Field of the invention

The present invention relates to a water dispenser for hand washing according to the claims.

Background of the invention

Hand sanitation has always been of great importance in industries, in particular in medical, health and hospital environments, in food manufacturing facilities, in day cares, kindergartens and schools etc. The importance has grown considerably in recent years due to certain diseases and epidemics, in particular as a consequence of the outbreak of the COVID-19 epidemic, which has made increased hygienic procedures necessary in everyday scenarios among people in general and in a global context.

Thus, there is a need for a device which facilitate compliant hand wash procedures. Ideally the device should be adaptable and adjustable in order to target a broad audience, such as any age group, any relevant professional groups and/or any region of interest.

Summary of the invention

The invention relates to a water dispenser comprising a water inlet, a water outlet, a flow-path connecting the water inlet and water outlet, an adjustable flow regulator, a receiver, a water dispenser power supply and a control unit, wherein the adjustable flow regulator is communicatively coupled to the receiver via the control unit and wherein the adjustable flow regulator is configured for reducing a water flow between said water inlet and said water outlet in response to signals received from said receiver.

The water dispenser of the invention may advantageously facilitate a more compliant hand wash procedure, such as a more effective hand wash procedure. When using a water dispenser of the invention, the user may advantageously achieve an improved hand wash. This is highly important and highly valuable in medical, healthcare and hospital environments, in food manufacturing, in school and children care etc., where spreading of pathogens, disease infections etc. is not tolerated or must be diminished or even avoided.

It is well known that a high hand hygiene may reduce the spreading of diseases, such as infectious diseases, whereby disease-related absence may be diminished.

The water dispenser of the invention may advantageously facilitate an overall prolonged hand wash procedure, better utilization of cleaning agent, improved lathering of hands etc., and thereby users of the water dispenser according to the invention may achieve improved hand hygiene.

In particular, the controlled reduced water flow may advantageously improve the hand wash procedure, by motivating and facilitating a more thorough lathering, such as improved distribution of cleaning agent. Having a controlled, reduced flow is highly advantageous for any user group that needs to achieve or maintain a high level of hand hygiene. One case is in kindergartens (day care), where human resources are scarce, but systematic attention and guidance is needed to ensure an effective hand wash culture for all the kids.

Here, effective hand wash refers to a handwash where the level of pathogens distributed on the hands are highly reduced, such as at least 50% reduced, such as at least 60% reduced, such as at least 70% reduced, such as at least 80% reduced, such as at least 85% reduced, such as at least 90% reduced. The required level of reduction will rely on the industry or environment, where handwash is performed.

Responses to signals received from the receiver may be a response from an activation of a soap dispenser. Hereby, when a user applies soap to the hands via a soap dispenser, the adjustable flow regulator is activated and the water flow is reduced in a predefined period of time, e.g. 15 seconds, where after the waterflow returns to the initial water flow allowing the user to rinse off the lathered soap. Controlling the reduced water flow, i.e. reducing the water flow in a defined period of time is highly advantageously for users that may have difficulties in keeping a sufficient length of hand washing e.g. children. Hence, the water dispenser of the invention may advantageously be used in for example day care, where the resources needed to properly guide the children during the handwash situation may be limited.

The inventive water dispenser may provide an advantageous controlled and adjustable reduced water flow, meaning that the water dispenser is able to facilitate that a desirable reduced flow of water may be obtained, the level of water flow reduction is adjustable and the reduced flow of water may be achieved in a controlled and adjustable period of time.

The inventive water dispenser may facilitate an advantageously lower water consumption during hand wash as the water flow is reduced during lathering. Hence, the inventive water dispenser may represent a cost-effective solution.

The reduced water flow serves as a communicative tool, to tell the user to initiate and perform lathering and continue lathering for the time-period, wherein the water flow is reduced.

Also, the cost-effective aspect of the reduced water flow may encourage users to continue lathering for the full time period need in order to achieve a desirable, effective hand wash procedure as less water will be wasted compared to a non-reduced setup.

Here, reduction refers to a reduction of the water flow, i.e. reduction does not refer to a termination of the water flow.

Flow-path refers to the path wherein the water flows between the water inlet and the water outlet. In an embodiment of the invention the flow-path is tubes or pipes applicable for a flow of water.

According to an embodiment of the invention, the adjustable flow regulator is configured for reducing the water flow to achieve a reduced water flow of no more than 0.25 L per minute, such as no more than 0.2 L per minute. According to an embodiment of the invention, the adjustable flow regulator is configured for reducing the water flow from above 5 L per minute to a reduced water flow of no more than 0.25 L per minute.

Reducing the water flow to achieve a reduced water flow no more than 0.25 L per minutes may advantageously facilitate an improved distribution of cleaning agent on the hands.

If the reduced water flow is too high, such as above 0.25 L per minute, the cleaning agent will be rinsed off during lathering, which reduces the effectiveness of the hand wash.

Furthermore, the reduced water flow may enable an attractive foaming of the cleaning agent, which further improves the distribution of the cleaning agent.

Even further, the reduced water flow may advantageously enable use of any kind of cleaning agent, such as solid cleaning agent, cleaning agents with high viscosity, cleaning agents with low viscosity etc.

According to an embodiment of the invention, the adjustable flow regulator is configured for reducing the water flow to achieve a reduced water flow between 0.05 and 0.30 L per minute, such as between 0.05 and 0.25 L per minute, such as between 0.10 and 0.20 L per minute.

According to an embodiment of the invention, the adjustable flow regulator is configured for reducing the water flow from above 5 L per minute to achieve a reduced water flow between 0.05 and 0.30 L per minute, such as between 0.05 and 0.25 L per minute, such as between 0.10 and 0.20 L per minute.

According to an embodiment of the invention, the adjustable flow regulator is configured to achieve a reduction in water flow of at the water outlet of between 60% and 99.5%, such as between 70% and 99.5%, such as between 80% and 99.5%, such as between 90% and 99.5%.

From the above embodiment it may be understood that a 99% reduction may refer to for example that the waterflow is reduced from 15 L/min to a reduced waterflow of 0.15 L/min.

Advantageously, the water flow should be sufficiently reduced in order to prevent the cleaning agent from being rinsed off too early, while at the same time the water flow should be sufficient for desirable, effective lathering.

The reduced water flow is highly advantageous, for users, such as children, which may omit or forget to wet their hands before applying cleaning agent to their hands. These users, will despite the omitted wetting be able to achieve an effective lathering by performing the lathering partly or fully under the reduced flow of water facilitated by the water dispenser of the invention.

If the water flow is completely terminated, the effectiveness of the lathering may be lower and also rely on specific types of cleaning agents, which are distributable in the absence of a reduced water flow.

Furthermore, if the water flow is terminated, users which have not wetted their hands before applying cleaning agent will not be able to efficiently distribute the cleaning agent on their hands, hence the lathering will be less efficient.

According to an embodiment of the invention, the adjustable flow regulator is configured for reducing a water flow between said water inlet and said water outlet in response to signals received from said receiver and wherein the adjustable flow regulator is configured for automatically increasing the water flow under control by the control unit.

Automatically increasing may be performed within a predetermined time limit from the initial receipt of signals received from said receiver. It may thus be fixed time limits stored and controlled according to the control unit. The increasing of water flow may also be triggered of more advanced algorithms if so desired. Such algorithm could e.g. include a return to "normal" water pressure after a certain time, which may also be modified in dependency of the duration of the soap dispensing, the amount dispensed soap, the absolute initial water flow, etc.

According to an embodiment of the invention, the adjustable flow regulator comprises a solenoid valve.

In an embodiment of the invention the adjustable flow regulator comprises a latching solenoid valve.

A latching solenoid valve may represent a low power consuming solution.

Hence, the inventive water dispenser may advantageously comprise a latching solenoid valve, whereby the power consumption is low. This is highly advantageous if the water dispenser is powered by batteries.

In an embodiment of the invention, the water dispenser power supply comprise a battery pack and the adjustable flow regulator comprise a latching solenoid valve.

According to an embodiment of the invention, the adjustable flow regulator comprises a flow director and a parallel flow-path, wherein the flow director directs the water flow into the parallel flow-path, and wherein the parallel flow path reduces the water flow.

Here, the adjustable flow regulator is coupled in a parallel flow-path. The adjustable flow regulator may advantageously be a simple reduction in the flow path, such as a narrowed flow-path, whereby the water flow is reduced. This setup represents a very mechanically simple and cost-effective solution.

The narrowed flow-path may be adjusted by simply varying the diameter of the flow- path, such as by varying the diameter of the tubing constituting the flow-path. In an embodiment of the invention, the water dispenser will enable that upon response to signals received from the receiver, the flow director will direct the water flow from the primary flow-path and into the parallel flow path, where the adjustable flow regulator will reduce the water flow.

The primary flow-path may also be referred to as the main flow-path.

According to an embodiment of the invention, the adjustable flow regulator comprises a flow director and a parallel flow-path, wherein the flow director directs the water flow into the parallel flow-path, and wherein the parallel flow path comprises a water flow reducer and wherein the water flow reducer reduces the water flow.

Here, the narrowed flow-path may be facilitated by a manually adjustable flow reducer positioned in the parallel flow-path.

The water flow reducer is coupled in a parallel flow path. The water flow reducer may advantageously be a mechanical water flow reducer, such as a valve reducing the water flow. This flow reducer may be manually adjusted to achieve the desired reduced water flow needed for the intended use of the water dispenser.

This setup represents a very flexible and easily adjustable system. The manually adjustment of the water flow reducer may be performed during installation of the water dispenser or during optimization of the water dispenser setup.

Furthermore, reducing the water flow mechanically has the advantage of being adjustable according to different needs or requirements. Such adjustable needs may be a consequence of e.g. the use of different cleaning agents. Cleaning agents, such as soap, can have different textures and the water flow may need to be adjusted according to the texture or viscosity of the soap.

According to an embodiment of the invention, the flow director comprises a solenoid valve. In an embodiment of the invention, the flow director is a solenoid valve.

In an embodiment of the invention, the flow director is a latching solenoid valve. According to an embodiment of the invention, the water flow reducer comprises a ball valve.

In an embodiment of the invention, the water flow reducer is a ball valve.

In an embodiment of the invention, the water flow reducer is a manually operated ball valve.

In an embodiment of the invention, the flow director is a solenoid valve and the water flow reducer is a ball valve. In an embodiment of the invention, the flow director is a latching solenoid valve and the water flow reducer is a manually operated ball valve.

In an embodiment of the invention, the receiver is connected to the sensor via a threaded connection.

According to an embodiment of the invention, the receiver is a wireless receiver.

By using a wireless receiver, the installation of the hand wash design may advantageously be simplified and flexible. There need not to be any consideration of where to position a wire, nor any consideration of distances between receiver and the device generating the signals to the receiver, such as a sensor. The wireless receiver may be any type of receiver configured for wireless communication.

In an exemplified implementation of the invention, the wireless receiver is a Bluetooth receiver. However, in other implementations of the invention, the wireless receiver may be a wi-fi receiver. The wireless receiver may comprise one or more antennas, which may be of any type, whether currently available or a future development. In an exemplary implementation of the invention, the wireless receiver is comprised by the controller.

In a further implementation according to an embodiment of the invention, the water dispenser may comprise a wireless transmitter configured for transmitting signals. In exemplary embodiments of the invention, the transmitter may be comprised by the control unit.

In an embodiment of the invention, the receiver is coupled via a threaded connection. In an embodiment of the invention, the receiver is hard wired.

In an embodiment of the invention, the receiver is a wireless receiver coupled to the control unit via a threaded connection.

In an embodiment of the invention, the receiver is a wireless receiver wirelessly coupled to the control unit.

According to an embodiment of the invention, the signals are a response from an activation of a sensor.

In an embodiment of the invention, the sensor is a touch sensor, a proximity sensor or a motion sensor.

In an embodiment of the invention, the sensor is touch-free.

According to an embodiment of the invention, the signals are a response from an activation of a cleaning agent dispenser, wherein the response is mediated by an activation of a sensor, such as a cleaning agent dispenser-sensor.

Hereby, the water dispenser according to embodiments of the invention is communicatively coupled to a cleaning agent dispenser, such as e.g. a soap dispenser, where an activation of the soap dispenser, when a user applies soap to the hands, mediates a response and thereby signals to the water dispenser to reduce the water flow.

In an embodiment of the invention, the cleaning agent dispenser-sensor may e.g. be a touch sensor, a proximity sensor or a motion sensor and the cleaning agent dispenser sensor may have a power supply.

In an embodiment of the invention, the cleaning agent dispenser-sensor is a touch-free sensor.

In an embodiment of the invention, the cleaning agent dispenser-sensor is a proximity sensor, such as an infrared sensor, an ultrasonic sensor, a temperature sensor, a capacity sensor, accelerometer sensor etc.

Proximity sensor may advantageously be used in order to avoid direct contact between hand(s) and sensor and thereby diminish potential spreading of pathogens from user to sensor and/or from user to user.

The cleaning agent dispenser may be manually activated, such as by manually pumping cleaning agent into user’s hand or hands.

In an embodiment of the invention, the sensor is positioned such that it detects the presence of a user’s hand or hands when manually activating the cleaning agent dispenser.

In an embodiment of the invention, the cleaning agent dispenser is sensor activated.

In an embodiment of the invention, the cleaning agent dispenser comprise a power supply. In an embodiment of the invention, the cleaning agent dispenser sensor is integrated into the cleaning agent dispenser.

In an embodiment of the invention, the cleaning agent dispenser sensor is communicatively coupled to both the water dispenser and the cleaning agent dispenser. Hence, when the cleaning agent sensor detects a user’s hand or hands, the cleaning agent dispenser is activated and a power operated pump delivers a portion of cleaning agent into the hand of the user, while at the approximately same time the activation of the cleaning agent dispenser signal to the receiver of the water dispenser to reduce the water flow.

According to an embodiment of the invention, the control unit comprise a processing circuitry.

It is within the scope of the invention, that the control unit is capable of storing information in a memory and retrieving information from a memory. Examples of such information may for example comprise operational information, program instructions, settings regarding the level of water reduction and the length of the time period in which the water reduction is activated, number of handwashes etc.

In an exemplified implementation of the invention, the control unit may comprise at least one input for receiving information from an external device and it may further comprise at least one output for establishing a wired connection through which an external device may retrieve information stored on the control unit or stored on a memory positioned external to the control unit and connected to the control unit via wired connection. Hence, the control unit may therefore be configured for wired communication with an external device such as a computer, a cell phone, a tablet or the like.

In an exemplary embodiment of the invention, the control unit comprises a wireless transmitter. Hence, the control unit is capable of transmitting information wirelessly to external devices. Such devices may include any electronic device with a wireless receiver, including for example cell phones or the like. This has the advantage that a user wirelessly may retrieve information stored in the memory of the control unit regarding for example, but not limited to, the current or historical use of the water dispenser, potential error reports, or general operational information etc..

In an exemplified implementation of the invention, the control unit is a microcontroller. This is advantageous in that a microcontroller is reliable, cost- effective and energy efficient.

In an embodiment of the invention, the control unit is configured as a system on a chip (SoC). Advantageously, the system on a chip may be configured with a higher processing power, more memory, additional peripheral components such as for example wireless receivers/transmitters and audio and graphical inputs and outputs etc., compared with for example a microcontroller or the like. Hence, advantageously the system on a chip may be configured to meet requirements of many different implementations of the invention.

According to an embodiment of the invention, the water dispenser further comprises a timer.

According to an embodiment of the invention, the control unit comprises a timer.

According to an embodiment of the invention, the timer is an adjustable timer configured for reducing the water flow for a pre-defmed time period.

Hereby, the timer can advantageously be adjusted according to e.g. types of cleaning agents and/or different users of the water dispenser, such as children or hospital health care workers.

It is well accepted that the effectiveness of a hand wash rely on the time period users are lathering their hands, see for example ’’Centers for Disease Control and Prevention, Boyce M.D., Pittet D. (2002) - Guideline for Hand Hygiene in Health-Care Settings”. Here, it is reported that a lathering-time of only 2 second result in bacterial reduction of 24% or less. Whereas a lathering period of more than 15 seconds results in a bacterial reduction of more than 85%.

Hence, an effective hand wash relies on both an efficient distribution of the cleaning agent on the hands and a sufficiently long lathering period.

The inventive water dispenser allows the users to efficiently distribute any kind of cleaning agent by providing reduced water flow. In addition, the inventive water dispenser motivates and facilitate a sufficiently long lathering period, by reducing the water flow for a desired predefined time period.

According to an embodiment of the invention, the timer is an adjustable timer configured for reducing the water flow for a pre-defmed time period, wherein the pre defined time period is at least 5 seconds, such as at least 10 seconds, such as at least 15 seconds, such as at least 20 seconds.

The pre-defmed period should advantageously be sufficiently long to motivate and facilitate improved lathering of the user’ s hands, whereby a more effective hand wash may be achieved.

If the pre-defmed time period is too short, such as below 5 seconds, a less effective handwash is achieved.

According to an embodiment of the invention, the timer is an adjustable timer configured for reducing the water flow for a pre-defmed time period, wherein the pre- defmed time period is between 5 seconds to 2 minutes, such as between 10 seconds to 1 minute, such as between 10 to 40 seconds, such as between 10 to 30 seconds.

The timer should advantageously be sufficiently long, while at the same time not being too long, such as above 2 minutes, as users may then settle for insufficient rinsing of hands or even skip rinsing of hands. In an embodiment of the invention, the adjustable flow regulator is configured for reducing the water flow to achieve a reduced water flow below 0.30 L per minute for a pre-defmed time period of at least 5 seconds.

In an embodiment of the invention, the adjustable flow regulator is configured for reducing the water flow to achieve a reduced water flow between 0.05 and 0.30 L per minute for a pre-defmed time period between 5 seconds to 2 minutes. In an embodiment of the invention, the adjustable flow regulator is configured for reducing the water flow to achieve a reduced water flow between 0.05 and 0.20 L per minute for a pre-defmed time period between 10 seconds to 30 seconds.

The inventive water dispenser according to any of the previous embodiments may be an add-on to an already installed water dispensing means, i.e. retrofitted to a water dispensing means, such as a faucet, as illustrated in the figure 7.

According to an embodiment of the invention, the adjustable flow regulator in addition is configured for terminating the water flow by manual operation.

The inventive water dispenser may be a modified or rebuilt, otherwise conventional water dispensing means, such as a faucet. As an example, the flow terminator within a conventional faucet may advantageously be exchanged for an inventive controlled and adjustable flow regulator, which, in addition to enable a reduced water flow for a pre-defmed period, is also able to terminate the water flow.

Here, flow termination refers to a complete termination of the water flow, i.e. flow termination does not refer to a reduced water flow as no water flow will be present after a flow termination.

A flow terminator being in the closed state terminates the water flow completely. A flow terminator being in an open state, will allow a water flow to pass. This water flow may be around 3 to 15 L per minute in order to facilitate a proper wetting of a user’s hands prior to applying cleaning agent. Also, a minimum water flow of around 3 to 15 L per minute may be needed for rinsing off the cleaning agent from a user’s hands after lathering.

The adjustable flow regulator may advantageously also enable water flow termination after complete hand wash procedure. This enables the use of a single regulator, such as a single valve, for both reducing the water flow and for terminating the water flow. Furthermore, the use of a single regulator may facilitate a desirable visual appearance, as the single regulator is fully incorporated into the hand wash device, such as a faucet. Also, the use of only one regulator may represent a cost-effective solution.

According to an embodiment of the invention, the adjustable flow regulator in addition is configured for terminating the water flow in response to signals received by a sensor communicatively coupled to said water dispenser.

Termination of flow may advantageously be sensor controlled.

In an embodiment of the invention, the water dispenser comprises a touch-free sensor.

The inventive water dispenser may be a modified or rebuilt, sensor-controlled water dispensing means, such as a sensor-controlled faucet. As an example, the flow terminator within a sensor-controlled faucet may advantageously be exchanged for an inventive controlled and adjustable flow regulator, which, in addition to enable a reduced water flow for a pre-defmed period, is also able to terminate the water flow upon response from a sensor.

According to an embodiment of the invention, the water dispenser further comprises a flow terminator arranged between the water inlet and the water outlet. The water dispenser may advantageously comprise a flow terminator. Examples of a flow terminator includes but are not limited to tab valves, faucet valves, spigot valves, valves in water armature or water fittings.

According to an embodiment of the invention, the water dispenser further comprises a flow terminator arranged between said water inlet and said water outlet and wherein the flow terminator is manually operated.

In an embodiment of the invention, the user of the inventive water dispenser may manually initiate and terminate a hand wash procedure, by manually opening the flow terminator when starting the procedure and manually closing the flow terminator when ending the procedure, i.e. after proper rinsing of hands.

According to an embodiment of the invention, the water dispenser further comprises a flow terminator arranged between said water inlet and said water outlet and wherein the flow terminator is automatically operated in response to signals received by a flow- terminator sensor communicatively coupled to said water dispenser.

In an embodiment of the invention, the flow terminator sensor is a proximity sensor.

In an embodiment of the invention, the user of the inventive water dispenser may initiate and terminate a hand wash procedure, by activating a flow terminator sensor, i.e. the sensor detects the presence of a user’s hand or hands, which opens the flow terminator and which closes the flow terminator when ending the procedure, i.e. when hands are removed from the water flow and sensor detects the absence of a user hand or hands.

It is within the scope of the invention that the sensitivity of the sensor may be adjusted. Thereby the water dispenser may be configured to function in many different environments and according to different user preferences. In an exemplified implementation of the invention, a number of parameters regarding for example use of the water dispenser may be measured and stored in the control unit such parameters may for example comprise the handwash time and number of handwashes. Handwash time may for example be defined as the time period starting when a sensor detects the presence of a user’s hand and until the hand is no longer detected by the sensor.

In an implementation of the embodiment of the invention, the average handwash time, may be calculated and stored in the control unit or in an external memory connected to the control unit.

In an exemplary implementation of the invention, the stored parameters regarding use of the water dispenser may be retrieved by an external device, for example a computer or a cell phone. This may be done by wired as well as wireless communication with the control unit.

According to an embodiment of the invention, the water dispenser comprises a conventional faucet and wherein the faucet comprising an attachment coupled to the outlet of the faucet and wherein the attachment comprises the adjustable flow regulator and wherein the water flow from the faucet is formed by the water outlet.

According to an embodiment of the invention, the water dispenser comprises a conventional faucet, faucet connectors and at least one attachment coupled to the faucet connector(s), wherein the faucet connector(a) connect the faucet to a water supply, wherein the faucet comprises the water outlet, the water supply being the water inlet, and the at least one attachment comprises the adjustable flow regulator(s).

Here, faucet connectors refer to the connectors or supply lines connecting the faucet to the water supply. Here, water supply refers to the incoming water, such as the incoming water delivered via piping from a water supplier to a user. The delivery pipes may comprise an end- valve, such as a Ball-O-Fix valve.

Here, an attachment refers the adjustable flow regulator and the components needed for installing the adjustable flow regulator in the system. Hence, an attachment includes the adjustable flow regulator and may further include relevant fitting, pipes, valve, etc. needed in the installation of the adjustable flow regulator.

In an embodiment of the invention, the water dispenser comprises a conventional faucet, faucet connectors and at least one attachment coupled in between the faucet and the water supply, i.e. at least one attachment coupled to the faucet connectors and to the end-valve of the delivery pipes, e.g. the Ball-O-Fix valve.

In an embodiment of the invention, the water dispenser comprises at least one attachment, such as one attachment, such as two attachments, wherein the attachment(s) comprise(s) the adjustable flow regulator.

In an embodiment of the invention, the water dispenser comprises one attachment, wherein the attachment comprises the adjustable flow regulator.

In an embodiment of the invention, the water dispenser comprises two attachments, wherein the attachments comprise the adjustable flow regulator.

According to an embodiment of the invention, the water dispenser comprises a conventional faucet, faucet connectors and an attachment coupled in between the faucet connectors and the faucet, wherein the faucet comprises the water outlet, the faucet connectors being the water inlet, and the attachment comprises the adjustable flow regulator.

Here, faucet connectors refer to the connectors or supply lines connecting the faucet to the water supply. According to an embodiment of the invention, the flow-path connecting the water inlet WI and water outlet on the inlet side includes two separate water inlets, a cold-water inlet and a hot-water inlet.

In an embodiment of the invention, the flow path connecting the water inlet and water outlet on the inlet side includes two separate water inlets, a cold-water inlet and a hot- water inlet, which merge into the flow-path. The merging could be in a mixer compartment, such as a mixer tap.

According to an embodiment of the invention, the cold-water inlet and a hot-water inlet are regulated individually by respective adjustable flow regulators.

In an embodiment of the invention, adjustable flow regulators are installed on two water inlets, such as a hot-water inlet and a cold-water inlet.

According to an embodiment of the invention, a cold-water inlet and a hot water inlet merge into the flow path forming the water outlet, and wherein the merged flow path is regulated by the adjustable flow regulator.

The invention further relates to a kit of parts comprising an adjustable flow regulator, a control unit, a receiver, and components needed to assemble a water dispenser in accordance with embodiments of the invention. According to an embodiment of the invention, kit of parts comprising a water dispenser in accordance with embodiments of the invention and a faucet.

According to an embodiment of the invention, kit of parts comprising a water dispenser in accordance with embodiments of the invention, a faucet, a cleaning agent dispenser and a sensor related to the cleaning agent dispenser. The invention further relates to a system for hand wash, the system comprises a water dispenser, a cleaning agent dispenser, and a sensor related to the cleaning agent dispenser.

The invention further relates to a system for hand wash, the system comprises a water dispenser, a cleaning agent dispenser, and a sensor related to the cleaning agent dispenser, wherein the water dispenser and cleaning agent dispenser is physically separated.

The water dispenser may also be understood as a controllable water dispenser and such water dispenser may e.g. be a faucet. The cleaning agent dispenser may e.g. be a soap dispenser and the sensor may be also be understood as an activation trigger.

The invention even further relates to a method for operating a water dispenser according to embodiments of the invention, comprising the steps of -enabling an initial water flow between water inlet and water outlet -automatically reducing the initial water flow between the water inlet and the water outlet to a reduced water flow in response to activation of a soap dispenser.

According to an embodiment of the invention the soap dispenser is communicatively coupled with the water dispenser and wherein the water flow is reduced from the initial water flow established prior to detected activation of the soap dispenser to the reduced water flow achieved upon detected activation of the soap dispenser, and wherein the reduced water flow is lower than the initial water flow.

According to an embodiment of the invention, the water dispenser enables automatic return of the initial water flow.

According to embodiments of the invention, the automatic return of the water flow may be an increase of the water flow compared to the reduced water flow and not necessarily a return to the original water flow. Increasing the water flow may be under control by the control unit. According to an embodiment of the invention, the reduced water flow is less than 0.25 L per minute. According to an embodiment of the invention, the reduced water flow is between 0.05 and 0.25 L per minute.

According to an embodiment of the invention, the water flow is reduced from an initial water flow between 10 and 15 L per minute to a reduced water flow of less than 0.25 L per minute.

According to an embodiment of the invention, the water flow is reduced from an initial water flow of at least 3 L per minute to a reduced water flow between 0.05 and 0.25 L per minute.

According to an embodiment of the invention, the water flow is automatically reduced for a pre-defmed time period of at least 5 seconds.

According to an embodiment of the invention, the water flow is automatically reduced for a pre-defmed time period between 5 seconds to 2 minutes, such as between 10 seconds to 1 minute, such as between 10 to 40 seconds, such as between 10 to 30 seconds.

In an embodiment of the invention, the water flow is reduced from an initial water flow of at least 3 L per minute to a reduced water flow between 0.05 and 0.25 L per minute for a pre-defmed time period between 5 seconds to 2 minutes, such as between 10 seconds to 1 minute, such as between 10 to 40 seconds, such as between 10 to 30 seconds. In an embodiment of the invention, the water flow is reduced from an initial water flow of at least 3 L per minute to a reduced water flow between 0.05 and 0.25 L per minute for a pre-defmed time period between 10 to 30 seconds. The invention further relates to use of a water dispenser according to embodiments of the invention comprising the steps of

- enabling a water flow, - wetting hands,

- applying cleaning agent from a cleaning agent dispenser) whereby a cleaning agent dispenser sensor is activated, wherein the activation of cleaning agent dispenser sensor mediates a response to a receiver, and wherein the receiver mediates a response to an adjustable flow regulator via control unit and reduces the water flow for a pre-defmed time period,

- lathering hands in the pre-defmed time period, and

- rinsing the lathered hands subsequently to termination of the pre-defmed time period.

The use of a hand wash device according to embodiments of the invention has the advantages of being adjustable and thereby enabling and facilitating optimal conditions for efficient hand wash.

In an embodiment of the invention, the user of the hand wash device may perform the lathering, while positioning hands under the reduced flow of water and/or while positioning hands outside the reduced flow of water.

In an embodiment of the invention, the user of the hand wash device may perform the lathering, while positioning hands under the reduced flow of water. In an embodiment of the invention, the user of the hand wash device may perform the lathering, while positioning hands outside the reduced flow of water.

The invention further relates to a method of installing a water dispenser by retrofitting a faucet comprising the steps of -providing a faucet,

-coupling the faucet to a water supply, and -coupling an attachment to the outlet of the faucet, the faucet including a flow terminator and the attachment including an adjustable flow regulator.

The invention further relates to a method of installing a water dispenser by retrofitting a faucet comprising the steps of -providing a faucet,

-coupling the faucet to a water supply via an attachment, the faucet including a flow terminator, the attachment including the adjustable flow regulator.

The invention further relates to a method of installing a water dispense by retrofitting a faucet comprising the steps of -providing a faucet,

-coupling the faucet to a hot-water inlet via an attachment,

-coupling the faucet to a cold-water inlet via an attachment, the faucet including a flow terminator and the attachments including the adjustable flow regulator.

The invention further relates to a method of installing a water dispenser by retrofitting a faucet according to embodiments of the invention, further comprising the steps of -coupling the adjustable flow regulator to a receiver via a control unit,

-coupling the receiver to a cleaning agent dispenser sensor and

-coupling the water dispenser to a power supply.

Various exemplary embodiments and details are described hereinafter with reference to the figures when relevant. It should be noted that the figures may or may not be drawn to scale and the figures are only intended to facilitate the description of the embodiments. The figures

The invention will be explained in further detail below with reference to the figures of which

Fig. la-b illustrate a water dispenser according to the invention, Fig. 2 illustrates a water dispenser corresponding to Fig. lb, Fig. 3a-5b illustrate an adjustable flow regulator, Fig. 6a-6b illustrate an adjustable flow regulator having a parallel flow-path, Fig. 7a-7d illustrate examples of a water dispenser and Fig. 8-9 illustrate an embodiment of a method according to the invention.

Detailed description

An exemplary embodiment of a water dispenser WD according to the invention is shown in a schematic manner in Fig. la. In this embodiment the water dispenser WD has a water inlet WI and a water outlet WO and wherein the water flow WF runs in a flow path FP with a water flow direction from the water inlet WI to the water outlet WO. In connection with the flow path FP, an adjustable flow regulator AFR may be provided, according to embodiments of the invention. Examples hereof will also be explained in detail in the following figures. The adjustable flow regulator AFR may be communicatively coupled to a receiver RE via a control unit CU and hereby the adjustable flow regulator AFR is configured for reducing the water flow WF between the water inlet WI and water outlet WO in response to a received control signal issued by the control unit in response to signal received by the control unit from the receiver RE.

The control unit CU is an electronical device configured to execute a set of program instructions. The control unit may for example comprise a computer processing unit, memory and inputs and outputs for establishing a wired and/or wireless connection to enable communication with external electronic devices. The control unit may be embodied and configured in many different ways and it is not necessarily as such established for use in the particular context of the present invention. The physical control unit may therefore be established as one unit, for example a microcontroller or a system on a chip (SoC), but it may also be implemented as separate distributed co- functioning units distributed in a shielded environment. The control unit may however be configured for automatic execution unique to the degree that it is set up for automatic control of operation of a system/water dispenser within the provisions of the present invention. The instructions may be stored in the above-mentioned memory or distributed between several memories.

The control unit CU may be applied as a stand-alone controller with included memory and associated power supply and the communication with the exterior and/or components of the inventive system may be performed wireless or hard wired. The software may be embedded in the controller as firmware and the software may optionally be subject to upgrading if so desired.

The important aspect of the configuration of the control unit CU within the scope of the invention is that the control unit CU on an automatic basis controls method steps to be performed automatically according to the provisions of the invention.

Flow-path FP refers to the path wherein the water flows between the water inlet WI and the water outlet WO. In an embodiment of the invention the flow-path FP is at least formed partly by tubes or pipes applicable for a flow of water. Examples of conduits such as suitable pipes or tubes include but are not limited to steel pipes, iron pipes, cast iron pipes, stainless steel pipes, galvanised pipes, plastic pipes, polyvinyl chloride (PVC) pipes, cross-linked polyethylene pipes, linear polyethylene pipes hereunder linear low density polyethylene pipes, polyoxymethylene pipes, copper pipes or combinations thereof. The flow path FP may in some embodiment advantageously be flexible tube(s) or pipe(s), such as a polyvinyl chloride pipe(s) surrounded by braided stainless steel or linear low density polyethylene pipe(s).

The adjustable flow regulator AFR may in some embodiments be provided as an adjustable valve. Examples of adjustable valves may include but are not limited to electromagnetic valve, solenoid valve, pinch valve, electric ball valve and latching solenoid valve. In an embodiment of the invention, the adjustable flow regulator AFR may be a solenoid valve, such as a latching solenoid valve.

As shown in figure la, the control unit CU is connected to a receiver RE and the adjustable flow regulator AFR. The control unit CU is powered by the water dispenser power supply WD-PS.

As shown in Figure lb, the adjustable flow regulator AFR may further include a parallel flow path PFP for the reduction of the water flow WF. The water flow WF is led from the water inlet WI through a flow path FP. Upon activation of a flow director FD, the flow director closes for the water flow WF through the primary flow path FP and directs the water flow WF into the parallel flow-path PFP. The flow director FD may be activated through a control unit CU upon signals received by the control unit CU from the receiver RE. The parallel flow-path PFP may be configured to reduce the water flow WF by any means of water flow reduction and may e.g. simply be a narrowed flow-path FP, a valve or e.g. an adjustable valve or reduction valve. Other manners of doing this is exemplified in more details in the following or will be apparent to a skilled person.

As shown in figure lb, the control unit CU is connected to a receiver RE and the adjustable flow regulator AFR. In the exemplary embodiment of figure lb, the illustrated connection between the control unit and the adjustable flow regulator may be a connection between the control unit CU and the flow director FD. In a further exemplary embodiment of figure lb, the illustrated connection between the control unit CU and the adjustable flow regulator AFR may be a connection between the control unit CU and the flow director FD and the water flow reducer WFR.

The control unit CU may be powered by the water dispenser power supply WD-PS.

Figure 2 shows an example of an embodiment corresponding to the water dispenser WD in Fig. lb comprising a water inlet WI and a water outlet WO, wherein the water flow WF is led in at least partly pipes or tubes through a primary flow-path PRI when the flow director FD is not activated. If the flow director FD is activated by control unit CU based on e.g. signals received from a receiver RE, the flow director FD closes and terminates the water flow WF through the primary flow-path PRI and redirects the water flow WF through pipes or tubes through the parallel flow-path PFP. The parallel flow-path PFP reduces the water-flow WF by a water flow reducer WFR e.g. a valve.

Examples of valves for reducing the water flow WF may e.g. be an adjustable valve, such as a regulation valve, such as an Aquaspeed valve and may be manufactured in materials such as brass, plastic, stainless steel, bronze, cast iron, polyoxymethylene, and galvanized pipe.

The water-flow reducer WFR may also be understood as a reduction valve. Non-limiting examples of water-flow reducer WFR, i.e. valve positioned in the parallel flow path PFP include a reduction valve, such as ball valve, such as a manually operated ball valve or an electric ball valve.

In an embodiment of the invention the water-flow reducer WFR may be a manually operated ball valve.

The primary flow-pathPRI may also be understood as a main flow path MFP.

The flow director FD may also be understood as a main valve.

Non-limiting examples of valves applicable as flow directors FD include but are not limited to NO/NC solenoid valve, pinch valve, electric ball valve and latching solenoid valve.

In an embodiment of the invention, the flow director FD may be a solenoid valve.

In an embodiment of the invention, the flow director FD may be a latching solenoid valve.

The water dispenser WD further include a control unit CU that may comprise processing circuitry, which provide the control of the water reduction by sending or transmitting signals upon receiving signals from a receiver to activate the flow director FD and terminate the water flow WF for a predetermined time, when e.g. a user’s hand is detected by a sensor when e.g. applying soap. Furthermore, in figure la, figure lb and figure 2, it is shown that a power supply WD- PS is provided, which may be in the form of a battery pack or an AC power supply. This power supply WD-PS is connected to the water dispenser WD and may provide power to other components, such as the control unit CU, flow director FD, water flow reducer WFR etc. Possibly, power may be provided to other components. For example, the power supply WD-PS may be connected to the supply of cleaning agent, e.g. soap.

Figure 3 to 6 shows non limiting examples of an adjustable flow regulator AFR. The figures illustrate modified valves, such as modified solenoid valves. However, the reduced water flow RWF may be achieved in other ways as would be apparent to a skilled person.

The illustrated valves comprise a spring-plunger SP, a membrane MEM and a seal SE. The membrane MEM may also be referred to as a diaphragm. The membrane MEM may be a rubber membrane. The seal SE may be a rubber seal. Alternatively, the plunger may comprise a rubber part on the bottom part approaching the seal, the seal may in that case be a rigid seal, such as a rigid plastic. Figure 3a and 3b show an example of an adjustable flow regulator AFR for incorporation into the exemplary embodiment of figure la.

Figure 3a shows an example of an adjustable flow regulator AFR with a water inlet WI and a water outlet WO and two water flow paths WFP1 and WFP2 that mediates a non-reduced water flow WF, i.e. being in the non-reducing state.

Figure 3b shows an adjustable flow regulator in the reducing state. Upon activation of the adjustable flow regulator of figure 3a, the spring-plunger SP approaches the seal SE until a complete closure between seal SE and spring-plunger SP, and membrane MEM and valve body VB, is achieved, as depicted in figure 3b.

The solenoid valve illustrated in figure 3b, comprise a modified valve body VB, where an opening, i.e. WPF2, facilitates the reduced water flow RWF. Figure 4a and b show an example of an adjustable flow regulator AFR for incorporation into the exemplary embodiment of figure la.

Figure 4a shows an example of an adjustable flow regulator AFR with a water inlet WI and a water outlet WO and a flow path FP that mediates a non-reduced water flow WF, i.e. the adjustable flow regulator is illustrated in the non-reducing state.

Figure 4b shows an adjustable flow regulator in the reducing state. Upon activation of the adjustable flow regulator of figure 4a, the spring-plunger SP approaches the seal SE until a complete closure between seal SE and spring-plunger SP, and membrane MEM and valve body VB, is achieved, as depicted in figure 4b.

The solenoid valve illustrated in figure 4b, comprises a modified membrane, where an opening OP facilitates the reduced water flow RWF. Figure 5a and figure 5b show an example of an adjustable flow regulator AFR for incorporation into the exemplary embodiment of figure la.

Figure 5a shows an example of an adjustable flow regulator AFR with a water inlet WI and a water outlet WO and a flow path FP that mediates a non-reduced water flow WF, i.e. the adjustable flow regulator is illustrated in the non-reducing state.

Figure 5b shows an adjustable flow regulator AFR in reducing state. The solenoid valve illustrated in figure 5b, comprises a modified seal SE. Upon activation of the adjustable flow regulator of figure 5a, the spring-plunger SP approaches the modified seal SE until complete closure between membrane MEM and valve body VB is achieved, as depicted in figure 5b. At this state the spring-plunger SP and the modified seal touches, however the modified seal has an opening OP which facilitates the reduced water flow RWF. Figure 6a-6b show in a schematic manner examples of embodiments of the invention an adjustable flow regulator AFR having a parallel flow-path PFP. Figure 6a shows an example of an adjustable flow regulator AFR with a water inlet WI and a water outlet WO and two flow-paths FP; a primary flow path PRI and a parallel flow path PFP that combined mediates a non-reduced water flow WF, i.e. the adjustable flow regulator AFR is illustrated in the non-reducing state.

Figure 6b shows an adjustable flow regulator in the reducing state. Upon activation of the adjustable flow regulator, here referring to activation of the flow director FD, of figure 6a, the spring-plunger SP approaches the seal SE until a complete closure between seal SE and spring-plunger SP, and membrane MEM and valve body VB, is achieved, as depicted in figure 6b. Complete closure of the flow director FD, directs the water flow into the parallel flow-path PFP whereby the water flow reducer WFR facilitates the reduced water flow RWF.

Fig. 7a-7d show in a schematic manner examples of embodiments of the invention a water dispenser WD.

Figure 7a shows a faucet comprising an outlet of the faucet OOF and two separate water inlets, a cold-water inlet CWI and a hot-water inlet HWI. The water inlets may be regulated individually by respective adjustable flow regulators such as an adjustable flow regulator cold water AFRC and an adjustable flow regulator hot water AFRH. The adjustable flow regulators may reduce the water flow as exemplified in figures 3-

5.

Figure 7b shows a faucet comprising an outlet of the faucet OOF and two separate water inlets, a cold-water inlet CWI and a hot-water inlet HWI. The water inlets may be regulated individually by respective adjustable flow regulators such as an adjustable flow regulator cold water AFRC and an adjustable flow regulator hot water AFRH. The adjustable flow regulators may reduce the water flow by as exemplified in figure

6

Figure 7c shows a faucet comprising an outlet of the faucet OOF and two separate water inlets, a cold-water inlet CWI and a hot-water inlet HWI. In this example the adjustable flow regulator is attached to the outlet of the faucet and the adjustable flow regulator may reduce the water flow as exemplified in figures 3-5.

Figure 7d shows a faucet comprising an outlet of the faucet OOF and two separate water inlets, a cold-water inlet CWI and a hot-water inlet HWI. In this example the adjustable flow regulator is attached to the outlet of the faucet and the adjustable flow regulator may reduce the water flow as exemplified in figure 6.

Figure 8 illustrates a visual representation of method steps for operating a water dispenser, according to an exemplified embodiment of the invention. This embodiment of the invention is able to automatically reduce water flow between a water inlet WI and a water outlet WO in response to activation of a soap dispenser and comprises tree method steps S1-S3, and one optional method step S4. However, note that embodiments of the invention are not restricted to these particular method steps. In particular, preferred embodiments may comprise additional steps as described below.

In step SI, water flow between a water inlet WI and a water outlet WO is enabled. In this embodiment of the invention, the water outlet is the outlet of a faucet. The water flow between the water inlet WI and water outlet WO is enabled manually by turning on the faucet. Thus, a user of this exemplified embodiment of the invention, who is about to wash hands, manually turns on the faucet.

In other embodiments of the invention, the water flow WF may be enabled automatically, for example, in response to a sensor, say a motion sensor, detecting motion such as hand motion near the faucet. Other types of sensors may be applied to perform the function of detecting a user who is about to wash hands, using the water dispenser WD according to the invention.

In step S2, the initial water flow between the water inlet WI and the water outlet WO is reduced in response to a sensor detecting activation of a soap dispenser, so that a user is allowed to lather hands with soap and water flowing from the water outlet WO, and rinse hands, without completely flushing the soap off of the hands due to a large water flow. The sensor detecting activation of the soap dispenser is communicatively coupled to the water dispenser WD, which is configured for reducing flow in response to activation of the soap dispenser. When a user who is about to wash hands activates the soap dispenser, a signal is sent to the water WD dispenser, which in response to receiving the signal, reduces the water flow WF. In this exemplified embodiment of the invention, activation of the soap dispenser is detected by a motion sensor positioned to detect motion occurring close to the outlet wherefrom the soap dispenser dispenses soap. Thus, when a user receives soap from the dispenser, the sensor detects motion and sends a signal to the water dispenser. A receiver of the water dispenser receives the signal and sends it to a control unit CU, which in response to receiving the signal activates an adjustable flow regulator AFR, which in turn reduces the water flow WF. The water flow WF is reduced for a pre-determined time period. In this particular embodiment of the invention, the flow is preferably reduced to between 0.05 and 0.25 L per minute.

In other exemplified embodiments according to the invention, the sensor detecting activation of the soap dispenser may be built into the soap dispenser. In further embodiments of the invention, it may be preferred that the sensor is positioned on the outside of the soap dispenser. Dependent on the particular implementation of the invention, different types of sensors and different configurations of sensors can be used.

In step S3, the control unit monitors the time from activation of the soap dispenser and determines when the pre-determined time period of flow reduction is elapsed. The control unit then issues a signal to the adjustable flow regulator, which in response returns the water flow between the water inlet WI and the water outlet WO to the initial level. Here initial level refers to the initial water flow between the water inlet WI and water outlet WO before the water flow was reduced by the adjustable flow regulator AFR. According to this particular embodiment of the invention, the pre-determined time period varies between 5 seconds and 2 minutes dependent on the given implementations of the invention. In an optional step S4, the flow of water between the water inlet WI and the water outlet WO is disabled, for example by the user manually turning off the faucet.

In an alternative embodiment according to the invention, the optional step S4 of disabling the water flow is performed automatically. In this particular exemplified implementation of the invention, a sensor, for example a motion sensor, detects a lack of motion near for example the water outlet WO. Upon detection of this lack of motion, the motion sensor issues a signal, or alternatively stops outputting a signal, to a receiver communicatively coupled with the control unit CU. Upon receiving this signal or alternatively upon termination of the signal from the motion sensor, the control unit instructs the adjustable flow regulator AFR to terminate the water flow between the water inlet WI and the water outlet WO. This automatic implementation of the optional step S4 may for example be advantageous in that it prevents water spillage that may otherwise occur in the event of a user forgetting to disable the flow of water by manually turning off the faucet.

Figure 9 illustrates a visual representation of method steps for installing a water dispenser by retrofitting a faucet according to an exemplified embodiment of the invention. This embodiment of the invention thereby enables, to existing faucet installations, the advantages according to the invention of reducing water flow between a water inlet WI and a water outlet WO in response to activation of a soap dispenser. The method comprises three installation method steps Ml -M3. However, note that embodiments of the invention are not restricted to these particular installation method steps. In particular, preferred embodiments may comprise additional steps as described below.

In installation method step 1 Ml, a faucet is provided. The faucet may be preinstalled.

In installation method step 2 M2, the faucet is coupled to a water supply. The water supply may already be coupled to the faucet. In installation method step M3, an attachment comprising an adjustable flow regulator is coupled to the water outlet of the faucet.

In other embodiments according to the invention, the faucet is coupled to a hot-water inlet and a cold-water inlet between the faucet’s cold-water inlet and the water supply and the faucet’s hot water inlet and the water supply via the attachment comprising the adjustable flow regulator.

In other embodiments according to the invention, the faucet is coupled to a single water inlet between the faucet’s singular water inlet and the water supply via the attachment comprising the adjustable flow regulator.

In other embodiments according to the invention, the faucet is coupled to a single water inlet between the faucet’s singular water inlet and a mixer tap via the attachment comprising the adjustable flow regulator.

According to the invention, any of the above-mentioned couplings, including coupling of the water outlet of the faucet to the attachment and of the faucet to the hot-water inlet and cold-water inlet or any other alternative couplings according to embodiments of the invention can be done in any thinkable way. These ways will be apparent to the skilled person and include for example compression coupling, slip coupling, barb coupling, coupling by welding, by gluing, by soldering, by knotting, and screw coupling and coupling by use of nipple or nail.

In an installation method step (not shown) according to the invention, the adjustable flow regulator is coupled to a receiver via a control unit and the receiver is coupled to a sensor. The sensor is positioned so that it can detect activation of a soap dispenser. Thereby, when the soap dispenser is activated the sensor informs the control unit via the receiver, and the control unit issues instructions to the adjustable flow regulator, which in response to receiving the instructions from the controller reduces the water flow. The water dispenser WD may further comprise a timer. The timer may be used to facilitate the predefined period of time wherein the water flow is reduced. Non-limiting examples of timers include internal clock within a control unit, for example an internal clock within a microcontroller or a timer with ON-OFF delay.

Other manners of doing this is possible, as it will be apparent to a skilled person.

The timer may in some embodiments be incorporated within the control unit CU.

In another embodiment of the invention the timer is a separate device able to communicate with the control unit CU.

The timer may in some embodiments be configured for interacting with further devices, such as a display, a speaker and/or indicator light, or a device, for example a motor capable of generating a tactile response.

It is further within the scope of the invention to control, by adjustable flow regulators, the flow of water from the hot and cold-water inlets independently, to achieve a desired temperature of the water flowing out of the water outlet upon activation of the adjustable regulator. The temperature may be predetermined and adjusted as needed.

Even further, it is noted that according to an embodiment the water dispenser WD may be able to communicate with other devices, communication means, etc, for example via a (not shown) module for Bluetooth connection, an internet connection, a Wi-Fi connection, etc. Hereby, any service signals, e.g. low battery, may be communicated to the person in charge in this way, e.g. via an internet connection, via a Bluetooth connection or the like, including the ID of the specific apparatus.

In an embodiment of the invention, the water dispenser WD may comprise a memory device. The memory device may be part of the control unit or it may be a separate component. A memory device may advantageously enable collection of data, such as data on when and how often hand washing is performed, and the amount of water spent by using the invention. The data may be collected via a communication means, such as an internet connection. The data may also be transmitted to external devices either via a wired connection or via a wireless transmitter.

In an embodiment of the invention, the water dispenser WD may comprise a display. The display may motivate and mediate for example count-down during the defined period of time, where the water flow is reduced.

Furthermore, the water dispenser WD may comprise a number of indicator lights (not shown) to e.g. illustrate and/or motivate the user while the water is reduced during lathering of the hands. Such indicator lights may be arranged in multitude of ways, patterns, colours, etc. The indicator light may also be used as count-down illustrator and mediator.

Even further, the water dispenser WD may comprise a speaker (not shown), for the purpose of illustration and/motivating the user during lathering and handwashing. The speaker may also be used as count-down mediator.

Example 1: Test of a water dispenser WD effect on lathering time when installed in a danish day care.

Small children, such as children in the age of 3 to 5 years, most often rely on guidance or instructions in order to perform an effective handwash procedure. Thus, small children may be considered a highly suitable audience for testing the water dispenser WD.

A water dispenser WD, as exemplified on figure 7, was installed in a day care for children in the age of 3 to 5 years. The water dispenser WD was adjusted to reduce the water flow to 0.1 L per minute in 15 seconds. The children’s handwash procedures were documented using video both before installation of the water dispenser WD and after installation of the water dispenser WD. The time the children used to lather their hands before and after installation of a water dispenser is presented in the table below.

Table 1:

The data clearly demonstrates that the installation of a water dispenser WD prolong the time the children use on lathering their hands. The average lathering time was increased from 3 seconds to 9 seconds.

Before installation of a water dispenser WD, 64% of the children used 0-2 seconds to lather their hands, i.e. a very ineffective handwash procedure. Furthermore, the children did not sufficiently distribute the soap on their hands, which further reduce the effectiveness of their handwash procedure. After installation of the water dispenser WD, the children lathered their hands in an average time period of 9 seconds. Thus, a significant improvement was observed. Furthermore, it was experienced that the children much more carefully distributed the soap on their hands, thereby even further contributing to a more efficient hand wash procedure.

Example 2: Test of a water dispenser WD effect on disease related absence among day care workers (nursery teachers).

This test was performed over a time period of 4 months. The water dispensers WD (13 in total) were installed in two-day care centres and the data generated were compared to two control day care centres being in the same region. The test institutions and the control institutions have been matched with respect to disease level and location.

The water dispenser was installed on both the faucets used by the children and faucets used by the nursery teachers. Thus, the data will reflect the effect of the nursery teachers using the water dispenser WD themselves and the effect of the children using the water dispenser WD on the disease related absence among the nursery teachers. The water dispenser was adjusted to reduce the water flow to 0.1L per minute in 15 seconds.

In day care institution 1, DC1, 7 water dispensers WD were installed. The institution counts 10 nursery teachers.

In day care institution 2, DC2, 6 water dispensers WD were installed. The institution counts 24 nursery teachers.

Data on disease related absence were compared to similar data from the year before. The results are shown in the table below:

Table 2: Both test institutions experienced significantly less disease related absence. An average of 50% less disease related absence was reported.

Hence, the data demonstrates that the installation of a water dispenser WD may significantly lower disease related absence among nursery teachers.

Example 3: Feedback from nursery teachers.

As stated above, small children, such as children in the age of 3 to 5 years, most often rely on guidance or instructions in order to perform an effective handwash procedure. During the test described in example 2, nursery teachers experienced further advantages of having a water dispenser installed.

These advantages include:

The need for guidance is reduced. The children can perform a satisfying hand wash procedure themselves.

The water dispenser guides the children in the different steps within a handwash procedure, i.e. wetting, using soap, lathering and rinsing.

These opinions illustrate that the water dispenser provides a controlled and effective hand wash procedure, which is highly applicable for children.

Example 4: Further conclusions

It was further noted that the test indicated a clear improvement in the children’s hand wash procedure by using a reduced water flow, compared to a complete closure of the water flow in a period of applying soap, i.e. the lathering period. It is assumed that this improvement is due to an overall better process of applying soap to the hands, i.e. more effective lathering, combined with a more efficient cleansing/rinsing of the hands afterwards.

It was further noted that the tests indicated a clear divide in users applying soap first and user applying water first, when initiating their hand wash procedure. Approximately 50% of people start their hand wash by wetting their hands whereas the remaining 50% start by taking soap. According to studies, the most effective and gentle way of using soap is to combine it with a little water. With a reduced water flow, instead of a complete closure of the water, the invention supports all users in their current hand wash procedure. The users, who apply water prior to soap, may continue their current initiation of hand wash behaviour. Also, the users who apply soap prior to wetting their hands may continue their current initiation of hand wash behaviour. Thus, the invention supports all user, instead of forcing some users to change their behaviour or giving them a negative experience, e.g. resulting in dry and irritated hands due to a lathering in the absence of a reduced water flow.

List WD Water dispenser WF Water flow WI Water inlet WO Water outlet FP Flow path FT Flow terminator FD Flow director RE Receiver cu Control unit

WD-PS Water dispenser power supply

AFR Adjustable flow regulator

PRI Primary flow-path

PFP Parallel flow-path WFR Water flow reducer RWF Reduced water flow WFP1 Water flow path 1 WFP2 Water flow path 2 SP Spring-plunger MEM Membrane SE Seal OP Opening VB Valve body CAD Cleaning agent dispenser CAD-S Cleaning agent dispenser sensor FT-S Flow-terminator sensor FAU Faucet F-CON Faucet connector IOF Inlet faucet OOF Outlet faucet CWI Cold-water inlet HWI Hot-water inlet WSUP Water supply

ATC Attachment

AFRC Adjustable flow regulator cold water

AFRH Adjustable flow regulator hot water S1-S4 Method steps

Ml -M3 Installation method steps