Technical Field

The present invention relates to a magnetic noise inhibitor in which applications involving an electric engine with more than one speed adjustment are operated, where the magnetic noise emitted by the engine or the noise of the wish of the corresponding engine is operating at low speed, is eliminated.

Prior Art

Nowadays electric engines with more than one speed are used in various applications to solve various problems. In the kitchens in the home environment or in the kitchens of many places serving a large number of people, range hoods or aspirators are used, which remove the smells that are occurred during preparation or cooking of foods and the beverages from the indoor environment.

With the help of a fan rotated by the electric engine, the aspirators deliver the food odors in the environment to the flue system of the building. The electric engines of the aspirators have more than one rpm or speed setting. Aspirators must have powerful engines to absorb and discharge large volumes of air. However, users want to use aspirators or range hoods that have good air suction power and that do not generate noise or produce little noise when operating.

Commercially available aspirators generally have noisy electric engines, including the first cycle setting. Electric engine manufacturers make the first speed settings of the engines they produce more than the desired level. In this way, the magnetic whish produced at low revolutions is suppressed by the high wind sound produced by the propeller. In this case, users who operate their aspirators at minimum speed will hear the noise of the fan as well as the additional costs because they will consume more power at high speed. For these reasons, there is a need for a magnetic noise inhibitor which will have an extra cost to the aspirator manufacturer.

In the state of the art, electric engine manufacturers use self-revved engines. Self-revved engines do not require an external speed or speed adjustment unit. Flowever, due to the nature of these engines, an irritating whish noise with magnetic cause is generated from the engine, even if the engine is running at the lowest speed. To prevent this, manufacturers avoid this through wind noise generated by the fan leaves which suppress the magnetic noise by increasing the lowest speed of rotation of the engine. This causes the aspirator user of to consume more electricity. In the state of the art, electric engine manufacturers use single revved engines. However, due to the single-revved nature of these engines, these engines offer multiple options which are very costly to the engine manufacturer. They must use an external speed adjusting unit, use a unit to adjust the engine speed with frequency assistance, use units containing transistors, use capacitive speed cards, or use various converters. In the state of the art, which is the subject of the prior art application TR201203524, the invention relates to the installation of the circuit elements on the electronic circuit boards (such as printed circuit boards - PCB) which are the control units of the aspirators used in the ventilation systems of the houses and industrial kitchens, and some improvements which will prevent the magnetic whish on the circuit board. The improvements mentioned in the present invention prevent the magnetic noise generated by the electric engine running on the aspirator.

In the present invention, improvements in the circuit board and MOSFET (Metal Oxide Semiconductor Field Effect Transistor) transistors, and since temperature sensors and filters used to filter the harmonics of the undulating voltage is used they add additional costs to the aspirator manufacturer and increase the selling price of the aspirator. Short Description of Invention

The object of the present invention is to provide a magnetic noise inhibitor in which the air absorbing engine operating in the aspirator is prevented by the magnetic whish or whistling noise that is produced when operating at the lowest rpm.

Another object of the present invention is to achieve a magnetic noise inhibitor that allows the consumer to conserve electricity by preventing the magnetic whish occurring at low rpm in self-revving engines.

Another object of the invention is to realize a magnetic noise inhibitor by applying a special connection form without disturbing the self-revving of the engines. Another object of the present invention to provide a magnetic noise inhibitor that allows self- rotating electric engines to operate without whish even at very low speeds, as healthy and consuming much less energy.

Detailed Description of Invention

In order to achieve the object of the present invention, a "Magnetic Noise Inhibitor" is shown in the Figure in Annex; and this

Figure- 1 is a detailed schematic view of a magnetic noise inhibitor according to the invention.

Parts included in the figure are individually enumerated and their equivalents were provided below. 1. Magnetic noise inhibitor

2. Body

3. Switching element

4. Filter 5. Engine

6. Connector

7. Magnetic interference suppressor

A magnetic noise inhibitor (1) according to the invention;

- at least one body (2) on which the circuit elements are fixed the other surface of which is insulating and the other surface is electrically conductive;

- multiple switching elements (3) for transmitting power to the circuitry on the body (2) and for switching on electricity to certain elements on the body (2),

- at least one harmonic filter (4) which prevents the frequency fluctuations of the circuit elements operating on the body (2),

- at least one electric engine (5) having an air suction feature on the body (2) and having multiple revving speed adjustments;

- at least one connector (6) securing the electric engine (5) on the body (2) and

- the at least one magnetic interference suppressor (7)connected to the switching element (3) to operate the engine (5) at the lowest revving.

In a preferred embodiment, the body (2) is manufactured of a printed circuit board (PCB). The planned switching elements (3), the harmonic filters (4), the magnetic interference suppressor (7)and the connector (6) are fixed by soldering in the small holes on the body (2). In a magnetic noise inhibitor (1) according to the invention, the relay is used as the switching element (3). The switching element (3) directs the power supply to the body (2) to cut off some of the components' electricity and allow some to receive electricity.

In a magnetic noise inhibitor (1 ) according to the invention, the filter (4) prevents the harmonic noise of the circuit elements on the body (2) to the electrical network to which the body (2) is connected.

In one embodiment of a magnetic noise inhibitor (1) according to the invention, more than one conductive wire are wrapped around the engine (5).

In a magnetic noise inhibitor (l) according to the invention, the connector (6) transfers the incoming electricity from the switching elements (3) on the body (2) to the engine (5).

In a magnetic noise inhibitor (1) according to the invention, an electric charge storage capacitor is used as the magnetic noise inhibitor (7). In the preferred embodiment, the magnetic interference suppressor (7)has a capacity of 6.3 microfarads. The magnetic interference suppressor (7)is fixed on the transmission path of the switching element (3) to transmit the lowest speed to the engine (5) on the body (2). The magnetic interference suppressor (7)prevents the whish or hum noise emitted by the engine (5) running at the lowest speed on the body (2).

A magnetic noise inhibitor ( 1) according to the invention, transmits the electricity through the relays via the voltage switching relays in the body (2) to the harmonic filter (4), the engine (5) and the connector (6) on the body (2). Minimum speed adjustment button on the body (2) in the aspirator is connected to the first relay on the body (2). With the operation of the first relay, electrical load begins to accumulate in the 6.3 micro-farads capacitor, which has the magnetic interference suppressor (7)connected to the transmission channel of the city electricity relay. The inductive resistance (L), capacitive resistance (C) and the winding effective resistance (R), as the engine (5) includes by nature, together form a total impedance value. Since the L and C resistors in the internal structure of the engine (5) cannot be changed, a serial capacitor (magnetic noise inhibitor (7)) is connected to the engine (5) to change the total impedance of these three elements (R, T and C) on the body(2) and to stop the humming or which noise from the engine (5) at low voltage. This magnetic noise inhibitor activated by the first relay (7) prevents the magnetic sounding noise generated in the engine (5) which is rotating in a minimum speed.

Thus, when aspirator users want to use their equipment at the lowest fan speed, they will be able to use it without hearing the magnetic-induced whirling or whish noise generated in the engine (5).

Users will observe reduction in the electricity bills because the engine (5) will run silently at the lowest planned speed speed. Instead of using costly engine (5) designs with the solution being used, the engine (5) running at the minimum speed but at the minimum speed becomes quiet.

It is possible to develop various applications for magnetic noise inhibitor (1), subject of invention, it may not be limited to examples described here, it is essentially as described in claims.