KR200235647Y1 - Circuit for driving vent motor of Over The Range - Google Patents

Abstract

The present invention relates to a ventilation motor driving circuit for a microwave oven with a hood that enables the design of a desired motor speed by applying a single coil winding and to reduce a product production cost. A power supply unit for supplying a voltage, a coil for generating a voltage for driving a ventilation motor by receiving a voltage supplied from the power supply unit, and detecting a temperature change inside the motor according to a load change of a corresponding motor when the ventilation motor is driven. It is composed of a temperature detection unit that cuts the voltage supplied from the power supply to the coil, so by using a vented motor with a single coil winding, it is easy to design the desired motor speed and reduce the cost of producing the vented motor. Compare small homes or interior spaces that don't require much energy (ie exhaust wind direction). It can be installed easily on the motor hood ventilation combine microwave oven installed in a narrow Car RV to require low noise.

Description

Ventilation motor driving circuit for laryngeal microwave oven {Circuit for driving vent motor of Over The Range}

The present invention relates to a microwave oven, and more particularly to a ventilation motor drive circuit of a microwave oven with a hood.

In general, a microwave oven cooks food at a high frequency oscillating from a magnetron, and a magnetron is installed at one side of the electric compartment, and the high frequency generated from the magnetron is configured to be irradiated into the cooking chamber through a waveguide, and the cooking chamber is cooked at the bottom of the cooking chamber. The tray is provided with a container, the tray motor is provided at the lower part of the tray is configured to be indirectly distributed by the rotation of the tray, the high frequency is indirectly distributed to the food is uniformly heated have.

In addition, the microwave oven is a multi-functional microwave that cooks food using only the high frequency oscillated from the magnetron, and a multi-functional microwave that can combine grill and oven cooking in addition to cooking by the high frequency by installing a heater or a convection pan in the cooking chamber. It is divided into a range.

These microwave ovens are mainly composed of tabletop microwave ovens, which are easily configured for easy installation and moving to any place. Currently, Over The Range (OTR) has been considerably developed to attempt system kitchen. There is a situation.

The hooded microwave oven saves kitchen space and allows housewives to simply cook or melt food in the microwave and cook them continuously in an electric or gas oven, so that they can cook comfortably while standing without bending. According to the average height of the general public, the gas stove is installed on the top of the countertop of the kitchen, which is installed, or it is installed on the upper side of the countertop so that housewives can cook conveniently.

The microwave oven for hood is installed above a cooking appliance such as an electric or gas oven, and has a hood function for discharging smoke and odor generated when cooking food by the electric or gas oven to the outside, or electric or gas. When cooking food by the oven range, the lighting function is added to give a soft atmosphere while illuminating the food.

This hood-use microwave oven has a tray motor for rotating the tray under the bottom of the cooking chamber, a vent fan on the outside of the top of the cooking chamber, a magnetron, a high-pressure transformer and a cooling fan for cooling it. Is installed.

In addition, the grill is installed on the front of the main body of the microwave oven so that the cooling fan can suck outside air, and a control panel with various control function indications for operating the microwave oven is installed right next to opening and closing the cooking chamber. have.

And if the smoke, odor and water vapor generated during cooking in the cooking utensils such as electricity or gas oven rises with the heat, the hood function to suck it and discharge it to the outside ventilating motor of the upper part of the cavity and the ventilation fan mounted on both sides It is made by a fan, and the smoke, odor and water vapor are sucked into the exhaust path formed inside the microwave oven by the rotation of the ventilation fan by the ventilation motor through the suction ports installed on both sides of the hood plate of the microwave oven to be discharged to the outside. do.

Hereinafter, referring to the accompanying drawings, a vent motor driving circuit of a microwave oven according to the prior art will be described in more detail.

1 is a circuit diagram illustrating a ventilation motor driving circuit of a microwave oven according to the prior art, Figure 2 is a view showing a ventilation motor and a ventilation fan according to the prior art.

As shown in FIG. 1, the ventilation motor driving circuit of the microwave oven with the hood according to the related art transmits the power of the power supply unit 2 by switching the power supply unit 2 to supply power, and according to the exhaust selection of the user. A switching unit 1 for control, a control coil L ₁ connected in series with the switching unit 1, a sub coil L ₃ having one end connected to the other side of the control coil L ₁ , and One end of the main coil L ₂ connected between the switching unit 1 and the control coil L ₁ and the other end of the sub coil L ₃ is connected to the switching of the switching unit 1. Accordingly, the motor capacitor C generates a voltage for driving the ventilation motor 20 by receiving the power supplied from the power supply unit 2, and the temperature change according to the load change of the corresponding motor when the ventilation motor 20 is driven. It consists of a temperature sensing unit (3) for detecting the power supply to cut off the power supply (2) The.

Referring to the operation of the ventilation motor driving circuit of the hood and microwave oven according to the prior art configured as follows.

First, when the user selects the outdoor exhaust, that is, when the user selects the outdoor exhaust, the switching unit 1 switches to the high terminal to generate a high speed air in consideration of a large amount of air flow due to the outdoor exhaust, thereby supplying power to the power supply unit 2. Is transmitted to the motor capacitor (C) through the control coil (L ₁ ) and sub-coil (L ₃ ).

Subsequently, the motor capacitor C receives a power transmitted through the serially connected control coil L ₁ and the sub coil L ₃ to generate a voltage for driving the ventilation motor 20 shown in FIG. 2. Subsequently, the ventilation motor 20 receives and drives the voltage generated by the motor condenser C to operate the ventilation fans 10a and 10b to discharge the indoor air to the outside.

Here, the smoke and odor generated during food cooking, that is, the wall exhaust exhausting the polluted air to the outside through the duct installed in the wall and the duct connected to the roof directly from the top of the product to the outside. It is divided into indoor exhaust, which is purged through exhausted roof exhaust and charcoal filter, and discharged back to the room.

And because the duct (Duct) at the time of roof exhaust or wall exhaust is about 3m in length to exhaust the polluted air to the outside must use a vent motor using a condenser.

In addition, when the user selects the indoor exhaust, the resistance of the exhaust air according to the indoor exhaust is relatively small when the user selects the indoor exhaust, so switching to a low terminal to generate a low speed ventilation to switch the power of the power supply unit 2 to the above. The sub coil L ₃ is transferred to the motor capacitor C.

The motor condenser C receives a power transmitted through the sub coil L ₃ to generate a voltage for driving the ventilation motor 20, and then the ventilation motor 20 is a ventilation fan 10a. By operating 10b, the indoor polluted air is purified through a charcoal filter (not shown) and discharged back to the room.

At this time, the temperature sensor 3 detects a temperature change in the motor according to the load change of the motor when the ventilation motor 20 is driven, and if the temperature is higher than the preset temperature, the power supply to the motor capacitor C is applied. Block it.

The ventilation motor driving circuit of the microwave oven according to the prior art described above has the following problems.

First, it is impossible to control the desired motor speed by using a ventilation motor using a control coil, a main coil, a sub coil, and a condenser.

Second, due to the high noise (approximately 60 dBA) generated by the high speed ventilation in outdoor exhaust and the friction noise (approximately 60 dBA) generated by the exhaust air colliding with the charcoal filter in the indoor exhaust, the conventional ventilator motor has low noise. It is not applicable to the microwave oven that is installed in small houses or RV cars where the required indoor space is relatively small.

Therefore, the present invention was devised to solve the above problems, and it is possible to easily control the desired motor speed by applying only a single coil winding without applying control coils, sub-coils and condensers to the ventilation motors, and improve product production costs. It is an object of the present invention to provide a ventilation motor driving circuit of a microwave oven with a hood that can be saved.

1 is a circuit diagram showing a ventilation motor driving circuit of a microwave oven according to the prior art

2 is a view showing a ventilation motor and a ventilation fan according to the prior art.

Figure 3 is a circuit diagram showing a ventilation motor driving circuit of the microwave oven with hood according to the present invention

4 is a view showing a ventilation motor and a ventilation fan according to the present invention

* Explanation of symbols for main parts of the drawings

100: power supply unit 200: temperature detection unit

L ₁₀₀ : Coil

The present invention for achieving the above object is a ventilation motor driving circuit of a microwave oven with a hood, the ventilation motor driving circuit of a microwave oven with a hood, a power supply for supplying a predetermined voltage and the voltage supplied from the power supply And a coil for generating a voltage for driving the ventilation motor upon receiving the input, and a temperature detector for detecting a temperature change inside the motor according to the load change of the motor when the ventilation motor is driven, and cutting off the voltage supplied from the power supply to the coil. It is composed of its features.

Hereinafter, with reference to the accompanying drawings, a vent motor driving circuit of a microwave oven according to the present invention will be described.

3 is a circuit diagram illustrating a ventilation motor driving circuit of a combined microwave oven according to the present invention, Figure 4 is a view showing a ventilation motor and a ventilation fan according to the present invention.

Ventilation motor driving circuit of the microwave oven with hood according to the present invention is, as shown in Figure 3, in the ventilation motor driving circuit of the microwave oven with hood, the power supply unit 100 for supplying a predetermined voltage and the power supply unit The coil L ₁₀₀ generating the voltage for driving the ventilation motor 120 by receiving the voltage supplied from the ₁₀₀ and the temperature inside the motor according to the load variation of the corresponding motor when the ventilation motor 120 is driven. It is configured to include a temperature detector 200 for detecting a change to cut off the voltage supplied from the power supply unit 100 to the coil (L ₁₀₀ ).

At this time, the temperature detector 200 is characterized in that the temperature (Thermal) element.

Referring to the operation of the ventilation motor driving circuit of the combined microwave oven according to the present invention is configured as follows.

First, the user turns on the ventilation switch (not shown) to discharge the smoke and the odor generated when cooking food to the outside.

Subsequently, when the ventilation switch (not shown) is turned on by the user, the power supply unit 100 supplies a predetermined voltage to the coil L ₁₀₀ .

The coil L ₁₀₀ receives a voltage supplied from the power supply unit 100 and generates a voltage for driving the ventilation motor 120 illustrated in FIG. 4 and applies the voltage to the ventilation motor 120.

At this time, the ventilation motor 120 is driven at a predetermined speed in accordance with the input of the voltage transmitted from the coil (L ₁₀₀ ) to operate the ventilation fan (110a) (110b) so that smoke and odor generated during cooking are discharged to the outside. Operate.

Here, the temperature detector 200 detects a temperature change inside the motor according to the load change of the motor when the ventilation motor 120 is driven.

That is, the temperature detector 200 detects the temperature generated inside the motor due to the overload of the ventilation motor 120 and when the detected temperature is higher than the preset temperature, the coil ( L ₁₀₀ cuts off the voltage of the power supply unit 100.

Subsequently, since the voltage is not supplied from the power supply unit 100, the coil L ₁₀₀ stops voltage generation for driving the ventilation motor 120 to prevent the motor damage.

As a result, the ventilation motor of the present invention uses a single coil winding to drive the motor, and thus, the ventilation motor of the present invention can be applied to a hood-use microwave oven installed in a small house or RV car that does not need a large amount of exhaust exhaust force (ie, exhaust air volume).

In addition, the ventilation motor of the present invention does not discharge smoke and odor generated during cooking in a small house through the roof of the house (applies a duct within 1m) or emits low noise in a relatively narrow indoor space such as an RV Car. Easy to install where required

As described above, the ventilation motor driving circuit of the microwave oven according to the present invention has the following effects.

First, it is easy to control the desired motor speed by using a ventilation motor with a single coil winding applied, it is possible to reduce the cost of the production of the ventilation motor.

Second, it is possible to easily install the ventilation motor in a microwave oven that is installed in a small house or indoor space that does not require a large amount of ventilation exhaust force (that is, exhaust wind direction) is relatively narrow and requires low noise.

Claims (2)

In the ventilation motor drive circuit of the hood and microwave oven, A power supply for supplying a predetermined voltage; A coil configured to receive a voltage supplied from the power supply unit and generate a voltage for driving the ventilation motor; And, Ventilation motor of a hood and microwave oven comprising a temperature detector for detecting a temperature change in the motor according to the load change of the motor when the ventilation motor is driven to cut off the voltage supplied from the power supply to the coil Driving circuit. The method of claim 1, Ventilation motor driving circuit of the microwave oven with a hood, characterized in that the temperature detection unit is a thermal element.