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Title:
TEMPERATURE MEASURING DEVICE, COOKING APPARATUS AND COOKING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2018/007122
Kind Code:
A1
Abstract:
The present invention refers to a temperature measuring device (2), a cooking apparatus (3) and a cooking system (1) comprising said measuring device (2) and said cooking apparatus (3). The cooking system (1) comprises wireless transmission 5 means for transmitting the temperature measured by the measuring device (2) to the cooking apparatus (3). The transmission means comprise an active communication unit arranged in the cooking apparatus (3) and a passive communication unit arranged in the measuring device (2), both communication units being configured for communicating with one another, the active communication unit generating an 10 electromagnetic field for feeding the passive communication unit, such that as a result of said electromagnetic field the measuring device (2) can measure the cooking temperature and transmit it to the cooking apparatus (3).

Inventors:
MUGICA ODRIOZOLA, Jose Ignacio (C/ Ibargarai, 36-5ºA, BERGARA, 20570, ES)
ZABALO BAYON, Aitor (C/ San Vicente Ferrer, 4 - 2º Izq, ARRASATE, 20500, ES)
QUEREJETA ANDUEZA, Felix (Rue Leon Lannepouquet Residence Les Tamaris nº 3, HENDAYE, 64700, FR)
Application Number:
EP2017/064691
Publication Date:
January 11, 2018
Filing Date:
June 15, 2017
Export Citation:
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Assignee:
COPRECI, S.COOP. (Avda. Alava 3, ARETXABALETA, 20550, ES)
International Classes:
H05B1/02; H05B3/68; H05B6/06
Foreign References:
US20090194526A12009-08-06
EP2945460A12015-11-18
US20100190436A12010-07-29
EP2005796A22008-12-24
Attorney, Agent or Firm:
IGARTUA IRIZAR, Ismael (Polo de Innovacion Garaia - Goiru Kalea 1, ARRASATE, 20500, ES)
Download PDF:
Claims:
CLAIMS

Temperature measuring device comprising

- at least one temperature sensor (20) for measuring a cooking temperature, and

- wireless transmission means for transmitting the temperature measured by said at least one temperature sensor (20) to a cooking apparatus (3), characterized in that

- the transmission means comprise a passive communication unit (21 ) configured for communicating with an active communication unit (32) of the cooking apparatus (3), the active communication unit (32) generating an electromagnetic field for feeding said passive communication unit (21 ), such that as a result of said electromagnetic field the measuring device (2) can measure the cooking temperature and transmit it to the cooking apparatus (3).

Measuring device according to claim 1 , wherein the passive communication unit (21 ) is a passive NFC antenna.

Measuring device according to claim 1 or 2, comprising positioning means configured for aligning the passive communication unit (21 ) with respect to the active communication unit (32) of the cooking apparatus (3), such that the passive communication unit (21 ) of the measuring device (2) is assured to be aligned with the active communication unit (32) of the cooking apparatus (3).

Measuring device according to claim 3, wherein the positioning means comprise at least one magnet (22), the cooking apparatus (3) comprising means attracting said magnet, such that the passive communication unit (21 ) is aligned with the active communication unit (32) of the cooking apparatus (3) when both communication units approach to one another.

Measuring device according to claim 4, wherein the positioning means comprise a ring-shaped magnet (22), the passive communication unit (21 ) being arranged in the center of said ring-shaped magnet (22).

6. Measuring device according to any of the preceding claims, comprising a body injected over the passive communication unit (21 ), the injected body (24) encasing the passive communication unit (21 ) and said body (24) being connected to the temperature sensor (20) by means of a cable (25).

7. Cooking apparatus comprising

- at least one cooking zone (31 ), and

- wireless transmission means for receiving the temperature measured by a measuring device (2) comprising at least one temperature sensor (20), characterized in that

- the transmission means comprise an active communication unit (32) arranged in the cooking apparatus (3) configured for communicating with a passive communication unit (21 ) of the measuring device (2), the active communication unit (32) generating an electromagnetic field for feeding said passive communication unit (21 ), such that as a result of said electromagnetic field the measuring device (2) can measure the cooking temperature and transmit it to the cooking apparatus (3).

8. Cooking apparatus according to claim 7, wherein the active communication unit (32) is an active NFC antenna.

9. Cooking apparatus according to claim 7 or 8, comprising positioning means configured for aligning the passive communication unit (21 ) of the measuring device (2) with respect to the active communication unit (32) of the cooking apparatus (3), such that the passive communication unit (21 ) of the measuring device (2) is assured to be aligned with the active communication unit (32) of the cooking apparatus (3).

10. Cooking apparatus according to claim 9, wherein the positioning means comprise at least one magnet (33), the measuring device (2) comprising means attracting said magnet (33), such that the passive communication unit (21 ) of the measuring device (2) is aligned with the active communication unit (32) of the cooking apparatus (3) when both communication units approach to one another. 1 1 . Cooking apparatus according to claim 10, wherein the positioning means comprise a ring-shaped magnet (33), the active communication unit (32) being arranged in the center of said ring-shaped magnet (33),

12. Cooking apparatus according to any of claims 9 to 1 1 , wherein the cooking apparatus (3) is a hob comprising a hotplate (30), the positioning means and the active communication unit (32) being arranged in the lower part (30b) of said hotplate (30).

13. Cooking system comprising

- a cooking apparatus (3) comprising at least one cooking zone (31 ), and

- a temperature measuring device (2) comprising at least one temperature sensor (20) for measuring a cooking temperature,

- said cooking apparatus (3) and said measuring device (2) comprising wireless transmission means for transmitting the temperature measured by said at least one temperature sensor (20) of the measuring device (2) to the cooking apparatus (3),

characterized in that

- the transmission means comprise an active communication unit (32) arranged in the cooking apparatus (3) and a passive communication unit (21 ) arranged in the measuring device (2), both communication units being configured for communicating with one another, the active communication unit (32) generating an electromagnetic field for feeding the passive communication unit (21 ), such that as a result of said electromagnetic field the measuring device (2) can measure the cooking temperature and transmit it to the cooking apparatus (3).

14. Cooking system according to claim 13, wherein the active communication unit (32) is an active NFC antenna and the passive communication unit (21 ) is a passive NFC antenna.

15. Cooking system according to claim 13 or 14, comprising positioning means configured for aligning the passive communication unit (21 ) with respect to the active communication unit (32), such that the passive communication unit (21 ) is assured to be aligned with the active communication unit (32).

16. Cooking system according to claim 15, wherein the positioning means comprise magnetic means arranged in the cooking apparatus (3) and in the measuring device (2), such that the passive communication unit (21 ) of the measuring device (2) is aligned with the active communication unit (32) of the cooking apparatus (3) when both communication units approach to one another.

17. Cooking system according to claim 16, wherein the positioning means comprise at least one magnet (33) arranged in the cooking apparatus (3) and at least one magnet (22) arranged in the measuring device (2).

18. Cooking system according to claim 17, wherein the positioning means of the cooking apparatus (3) comprise a ring-shaped magnet (33), the active communication unit (32) being arranged in the center of said ring-shaped magnet (33), and the positioning means of the measuring device (2) comprise a ring- shaped magnet (22), the passive communication unit (21 ) being arranged in the center of said ring-shaped magnet (22).

Description:
DESCRIPTION

"Temperature measuring device, cooking apparatus and cooking system"

TECHNICAL FIELD

The present invention relates to a temperature measuring device, a cooking apparatus, and a cooking system.

PRIOR ART The possibility of knowing the cooking temperature of a food and/or of the cooking medium of a food allows cooking said food in an optimal manner.

Cooking systems comprising a measuring device for measuring a cooking temperature are known. For example, EP2945460A1 discloses a cooking system comprising a cooking apparatus with a plurality of cooking zones and a controller. The cooking system also comprises a temperature sensor. The temperature sensor transmits the cooking temperature to the controller of the cooking apparatus. The controller can thereby adjust the power of the cooking zone in question. Communication between the temperature sensor and the cooking apparatus can be through wireless technology.

DISCLOSURE OF THE INVENTION The object of the invention is to provide a temperature measuring device, a cooking apparatus, and a cooking system, as defined in the claims.

A first aspect of the invention relates to a temperature measuring device comprising at least one temperature sensor for measuring a cooking temperature and wireless transmission means for transmitting the temperature measured by said at least one temperature sensor to a cooking apparatus.

The transmission means comprise a passive communication unit configured for communicating with an active communication unit of the cooking apparatus, the active communication unit generating an electromagnetic field for feeding said passive communication unit, such that as a result of said electromagnetic field the measuring device can measure the cooking temperature and transmit it to the cooking apparatus.

A second aspect of the invention relates to a cooking apparatus comprising at least one cooking zone and wireless transmission means for receiving the temperature measured by a measuring device comprising at least one temperature sensor.

The transmission means comprise an active communication unit arranged inside the cooking apparatus, configured for communicating with a passive communication unit of the measuring device, the active communication unit generating an electromagnetic field for feeding said passive communication unit, such that as a result of said electromagnetic field the measuring device can measure the cooking temperature and transmit it to the cooking apparatus. A third aspect of the invention relates to a cooking system comprising a cooking apparatus and a temperature measuring device such as those described above.

Given that the measuring device is fed by the electromagnetic field generated by the active communication unit of the cooking apparatus, the measuring device of the invention does not require any type of battery or connection to a power source to measure the cooking temperature or to transmit said cooking temperature.

These and other advantages and features of the invention will become evident in view of the drawings and the detailed description of the invention.

DESCRIPTION OF THE DRAWINGS

Figure 1 shows a perspective view of the cooking system according to an embodiment of the invention, the measuring device being separate from the cooking apparatus. Figure 2 is a perspective view of the cooking system of Figure 1 , wherein the measuring device is arranged in the contact area of the cooking apparatus. Figure 3 is a partial cross-section view of the cooking system of Figure 1 , wherein the measuring device is arranged in the contact area of the cooking apparatus.

Figure 4 is a detailed view of Figure 3. Figure 5 is a perspective view of the measuring device of Figure 1 .

Figure 6 is a cross-section view of the measuring device of Figure 1 .

DETAILED DISCLOSURE OF THE INVENTION

Figures 1 and 2 show an embodiment of the cooking system 1 according to the invention. The cooking system 1 comprises a cooking apparatus 3 comprising a cooking zone 31 . The cooking apparatus can be of any type known by the person skilled in the art, for example an induction cooktop, a glass ceramic cooktop or a gas cooking apparatus or a barbecue. In the embodiment shown in the drawings, the cooking apparatus 3 is a portable induction cooktop comprising a single cooking zone. In other embodiments, the cooking apparatus can comprise a plurality of cooking zones.

The cooking system 1 also comprises a temperature measuring device 2 comprising a temperature sensor 20 for measuring a cooking temperature. The cooking temperature can refer to the temperature of a food that is being cooked or to the medium in which said food is being cooked. For example, the sensor can be arranged inside a piece of meat that is being cooked in order to cook the meat to the desired point of doneness, but it also can be arranged in the oil in which a food is being fried so that the temperature of the oil is maintained at the optimal temperature. Preferably, the type of sensor used is a resistive temperature detector, for example a PT 100. This type of sensor comprises a resistance the value of which varies depending on temperature. In this embodiment, the temperature sensor 20 is arranged in a needle- shaped carrier 23. The needle shape of the carrier 23 makes the possibility of introducing the temperature sensor 20 into the food that is being cooked easier. In other possible embodiments, the measuring device can comprise more than one temperature sensor, for example it can comprise two temperature sensors, such that a first sensor can measure the temperature of the food that is being cooked, and a second sensor can measure the cooking temperature of the medium in which said food is being cooked.

The cooking apparatus 3 and the measuring device 2 comprise wireless transmission means for transmitting the cooking temperature measured by the temperature sensor 20 of the measuring device 2 to the cooking apparatus 3. The transmission means comprise an active communication unit 32 arranged inside the cooking apparatus 3 and a passive communication unit 21 arranged in the measuring device 2, both communication units being configured for communicating with one another, the active communication unit 32 generating an electromagnetic field for feeding the passive communication unit 21 , such that as a result of said electromagnetic field, the measuring device 2 can measure the cooking temperature and transmit it to the cooking apparatus 3.

The measuring device therefore does not require any type of battery or any connection to a power source to measure the cooking temperature or to transmit said cooking temperature. For measuring the cooking temperature and transmitting said cooking temperature to the cooking apparatus, the measuring device is fed by the electromagnetic field generated by the active communication unit of the cooking apparatus. Preferably, the technology used by the transmission means is near field communication (NFC) technology. Therefore, the active communication unit 32 is an active NFC antenna and the passive communication unit 21 is a passive NFC antenna. The person skilled in the art knows that according to ISO 14443, NFC is performed by means of induction in a magnetic field, wherein two spiral antennas are placed within their respective near fields. One of the NFC operating modes is passive communication and it is what is preferably used in this invention. In passive NFC, only one device, in this case the active communication unit 32, generates the electromagnetic field and the other one, in this case the passive communication unit 21 , uses the load modulation to transfer the data. The communication initiator is in charge of generating the electromagnetic field.

In other embodiments, the transmission means can use other technologies known by the person skilled in the art, provided that provided that the active communication unit can feed the measuring device.

In this embodiment, the cooking system 1 comprises positioning means configured for aligning the passive communication unit 21 with respect to the active communication unit 32, such that the passive communication unit 21 is assured to be aligned with the active communication unit 32. It is important for the passive communication unit 21 to be aligned with the active communication unit 32, since NFC technology requires both communication units to be arranged close to one another so that communication is correct.

In this embodiment, the positioning means comprise magnetic means arranged in the cooking apparatus 3 and in the measuring device 2, such that the passive communication unit 21 of the measuring device 2 is aligned with the active communication unit 32 of the cooking apparatus 3 when both communication units approach to one another, as observed in Figures 3 and 4. In this embodiment, the positioning means of the cooking apparatus 3 comprise a ring- shaped magnet 33, the active communication unit 32 being arranged in the center of said ring-shaped magnet 33, and the positioning means of the measuring device 2 comprise a ring-shaped magnet 22, the passive communication unit 21 being arranged in the center of said ring-shaped magnet 22.

As described above, in this embodiment the cooking apparatus 3 is a portable induction cooktop. The induction cooktop comprises a hotplate 30 where the cooking zone 31 is arranged. The assembly formed by the magnet 33 of the cooking apparatus 3 and the active communication unit 32 are likewise arranged in the lower part 30b of said hotplate 30. A marked reading area 34a is defined in the upper part 30a of the hotplate 30. The reading area 34 corresponds with the location of the active communication unit 32 and the magnet 33. No element needs to be added to the upper part 30a of the hotplate 30, as indicating the location of the reading area 34 by means of a marking, for example, is enough, so the hotplate 30 is flat on the entire upper part 30a, an easy-to-clean solution being obtained.

In other embodiments, the positioning means of both the cooking apparatus and the measuring device can comprise a magnet with another geometrical shape or a plurality of magnets, provided that they perform the function of the passive communication unit of the measuring device being aligned with the active communication unit of the cooking apparatus when both communication units approach to one another. In these embodiments, the active communication unit as well as the passive communication unit could be located in the area of said magnet or magnets. In another possible embodiment, the positioning means of the cooking apparatus can be replaced with a ferromagnetic element cooperating with the magnet of the measuring device.

In other possible embodiments, simpler positioning means could also be used, dispensing with magnets and ferromagnetic materials. For example, a housing for partially housing the measuring device could be made in the cooking apparatus.

The measuring device 2 of this embodiment, shown in detail in Figures 5 and 6, comprises a body injected over the passive communication unit 21 , the injected body 24 encasing the passive communication unit 21 . In this embodiment, the body 24 also encases the magnet 22 of the measuring device 2 and a treatment circuit, not shown in the drawings, adapting the signals between a temperature sensor 20 and the passive communication unit 21 . The body 24 is connected to the temperature sensor 20 by means of a cable 25. A completely leak-tight measuring device 2 is obtained by injecting the body 24 onto the mentioned elements, such that it can be washed in a dishwasher without any problem.

In this embodiment, the active communication unit 32 is arranged on the control plate 35 of the cooking apparatus 3. The active communication unit 32 communicates the temperature measured by means of the measuring device 2 to the control plate 35 of the cooking apparatus 3. The control plate 35 can, for example, thereby adapt the power of the corresponding cooking zone 31 so that the cooking temperature is kept constant, or it can give off an alarm when the cooking temperature reaches a given cooking temperature.