KR19980074356A - Microwave Exhaust System - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust device of a microwave oven, and in particular, the control means generates an exhaust control signal in accordance with a cooking signal detected by the key signal input through the key input means and the sensing means, and the relay of the exhaust fan driver. Applies a voltage of a predetermined level input from the outside in response to the exhaust control signal to the fan motor of the exhaust fan driver, and the fan motor generates a rotational power by the commercial alternating current voltage and rotates the exhaust fan. The air inside the cooking chamber is exhausted to the outside by the blowing pressure generated by the rotation of the fan, thereby preventing the occurrence of odor due to the residual food smell inside the cooking chamber.

Description

Microwave Exhaust System

The present invention relates to a microwave oven, and more particularly, to an exhaust device of a microwave oven suitable for deodorizing food in the cooking chamber by discharging the air of the cooking chamber to the outside through the exhaust fan driving unit.

In general, a microwave oven refers to a cooking apparatus that generates microwaves and allows food to be cooked by the dielectric heating action of the microwaves.

As illustrated in FIG. 1, the microwave oven includes a high voltage generator 10, a magnetron 20, a waveguide 30, a cooking chamber 40, a turntable 50, a turntable motor 60, and cooling. It consists of the fan 70 and the cooling fan motor 80.

In FIG. 1, the high voltage generator 10 transforms a commercial AC voltage input from the outside into a high voltage (for example, 4 kilovolts [KV]) suitable for high frequency generation, and applies the same to the magnetron 20. The magnetron 20 generates microwaves by performing high frequency oscillation by the high voltage.

In addition, the waveguide 30 guides the microwaves generated from the magnetron 20 to the inside of the cooking chamber 40 so that food in the cooking chamber 40 may be cooked by the dielectric heating action of the microwaves.

Then, the turntable motor 60 is rotated at a low speed (for example, 10 revolutions per minute) by a voltage of a predetermined level input from the outside to rotate the turntable 50, the turntable 50 is rotated in this way This causes the food to rotate and shoot the microwave evenly.

In addition, the cooling fan motor 80 is rotated by a voltage of a predetermined level input from the outside to rotate the cooling fan 70, the cold air is blown to the magnetron 20 by the rotation of the cooling fan 70. Thus, the high heat of the magnetron 20 generated at the time of driving is cooled.

In the conventional microwave oven configured as described above, when the user instructs cooking through the key input means, not shown, the high-voltage generator 10 receives high-frequency commercial AC voltage from the outside according to the control operation of the control means not shown. A high voltage suitable for generation is transformed, and the magnetron 20 receives the high voltage to generate microwaves to dielectrically heat food in the cooking chamber 40.

However, since the conventional microwave oven as described above is made in the cooking chamber 40 in which cooking of food is sealed, food smells generated from food during heating remain in the cooking chamber 40, Even after the cooking is completed, the food smell remaining in the cooking chamber may not be discharged to the outside, resulting in a bad smell caused by the residual food smell in the cooking chamber 40.

Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to provide an exhaust device of a microwave oven which can exhaust the air inside the cooking chamber to the outside, to prevent the smell of the cooking chamber. Is in.

In order to achieve the above object, an exhaust device of a microwave oven includes control means for generating an exhaust control signal according to a key signal or a selected cooking course input through a key input means, and an exhaust control signal of the control means. Therefore, the exhaust fan driving means for blowing the air in the cooking chamber to the outside is characterized in that it consists of.

1 is a schematic configuration diagram of a conventional microwave oven,

2 is a schematic block diagram of a microwave oven to which the present invention is applied;

3 is a schematic view of the exhaust fan driving unit shown in FIG.

4 is an operation flowchart of the control unit shown in FIG.

* Description of the symbols for the main parts of the drawings *

10, 400: high voltage generator 20, 500: magnetron

30: Waveguide 40, 600: Cooking room

50: turntable 60: turntable motor

70: cooling fan 80: cooling fan motor

100: key input unit 200: sensor unit

300: control unit 700: cooling fan drive unit

800: turntable drive unit 900: exhaust fan drive unit

910: fan motor 920: exhaust fan

930: Relay

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a schematic block diagram of a microwave oven to which the present invention is applied, and includes a key input unit 100, a sensor unit 200, a control unit 300, a high voltage generation unit 400, a magnetron 500, and a cooking chamber. 600, a cooling fan driver 700, a turntable driver 800, and an exhaust fan driver 900.

In FIG. 2, when a user manipulates a key, the key input unit 100 generates a key signal corresponding thereto, and the sensor unit 200 is in a state (eg, food) for food in the cooking chamber 600. Humidity, gas amount, etc. emitted from the) is detected, and generates a corresponding detection signal.

The controller 300 generates a corresponding microwave control signal, a motor driving control signal, and a display signal according to the key signal generated by the key input unit 100 and the temperature signal of the sensor unit 200 by a user's key operation. The high voltage generator 400 converts a commercial AC voltage input from the outside according to the microwave control signal of the controller 300 into a high voltage (for example, 4 kilovolts [KV]) suitable for high voltage generation. ) Is applied.

In addition, the magnetron 500 is a high frequency oscillation by the high voltage transformed by the high voltage generator 400, through which the microwave is generated is guided to the inside of the cooking chamber 600 through the waveguide, not shown.

The motor driving unit 700 includes a cooling fan and a fan motor, not shown, and rotates by receiving a commercial AC voltage applied to the outside of the fan motor according to a motor driving control signal of the controller 300. Power is generated, which causes the cooling fan to rotate.

In addition, the turntable driving unit 800 is composed of a turntable not shown and a turntable motor not shown, and in response to the motor drive control signal of the control unit 300 receives the commercial alternating voltage applied from the outside to the rotational power It generates, through which to turn the turntable.

As shown in FIG. 3, the exhaust fan driver 900 includes a fan motor 910, an exhaust fan 920, and a relay 930. The relay 930 is applied from the controller 300. In accordance with the exhaust control signal, a commercial AC voltage Vin input from the outside is applied to the fan motor 910, and the fan motor 910 generates a rotational power when the commercial AC voltage is inputted to exhaust fan 930. Will rotate.

Here, the fan motor 910 and the exhaust fan 920 are installed at a predetermined position (for example, a ventilation window inside the cooking chamber 600) suitable for inhaling air from the cooking chamber 600 and exhausting it to the outside.

Hereinafter, an operation example of the present invention having the configuration as described above will be described in detail with reference to FIGS. 2 to 4.

When the user inputs a cooking course (for example, warming, frozen food, thawing, cooking steel / weak, reservation time, type of food, weight of food, etc.) through the key input unit 100 (S10), The electrical key signal is input to the control unit 300.

Then, when the user manipulates the key for starting the aperture, the corresponding key signal is input to the control unit 300 (S20), the control unit 300 generates a microwave control signal, a motor drive control signal and an exhaust control signal. (S30), the cooling fan driver 700 and the turntable motor illustrated in the turntable driving unit 800 and the turntable motor not shown in the drawing according to the motor drive control signal of the control unit 300, respectively, from the outside The rotary power is generated by the input, and the cooling fan and the turntable, not shown, are rotated, respectively.

Accordingly, the cooling fan is rotated to blow the cold air to the magnetron 500, and the food on the turntable rotates.

At the same time, the high voltage generator 100 converts a commercial AC voltage input from the outside into a high voltage suitable for high frequency generation according to the microwave control signal and applies it to the magnetron 200.

As a result, the magnetron 500 is oscillated by the high voltage, and thus microwaves are emitted from the antenna not shown in the magnetron 500 to the inside of the cooking chamber 600 through the waveguide, not shown.

At this time, the food is heated by the dielectric heating action of the microwave, the humidity or gas amount of the heated food is detected by the sensor unit 200 is converted into a corresponding detection signal, and then applied to the control unit 300 do.

Next, the control unit 300 generates an exhaust control signal and applies it to the exhaust fan driver 900 (S40), and the relay 930 of the exhaust fan driver 900 is externally input according to the exhaust control signal. An AC voltage Vin is applied to the fan motor 910.

As a result, the fan motor 910 rotates to rotate the exhaust fan 920, and the air inside the cooking chamber 600 is blown out by the rotation of the exhaust fan 920.

Thereafter, the control unit 300 detects a heating state of the food, that is, a cooking progress state according to the detection signal applied from the sensor unit 200 (S50), and selects the cooking course according to the detected cooking progress situation (S10). In operation S60, the remaining cooking time is calculated according to the type or weight of the food input through the key input unit 100.

Next, when the remaining cooking time has elapsed, the controller 300 generates a microwave generation stop signal and a motor driving stop signal for stopping cooking (S70), and the high voltage generator 100 generates a microwave generation stop signal. Therefore, the generation of high voltage is stopped.

Accordingly, the magnetron 500 stops the high frequency oscillation, and since the generation of microwaves is stopped, the heating of the food is stopped.

In addition, the omitted fan motor and the illustrated turntable motor of the cooling fan driver 700 and the turntable driver 800 stop driving according to the motor driving stop signal, so that the illustrated fan motor and the illustrated turntable of the turntable motor are stopped. The rotation stops.

Thereafter, when a predetermined time (for example, 2 minutes) elapses, the control unit 300 generates an exhaust stop control signal and applies it to the exhaust fan driver 900 (S80), and relays the exhaust fan driver 900. 930 cuts off the commercial AC voltage Vin input to the fan motor 910 according to the exhaust stop control signal.

As a result, the fan motor 910 stops rotating and the rotation of the exhaust fan 920 is stopped.

On the other hand, in the embodiment of the present invention has been described only for the case of performing the exhaust operation according to the cooking course in which the cooking proceeds, for example, those skilled in the art perform the exhaust operation during the cooking according to the user's key operation of the user It may be set not to be, it will be readily understood that the exhaust operation can be performed even when the cooking is not in progress.

As described above, the present invention has an effect of deodorizing the odor remaining in the cooking chamber because the exhaust fan driving unit operates in accordance with the exhaust control signal of the controller to discharge the air inside the cooking chamber to the outside.

Claims (2)

In a microwave oven for generating microwaves to heat food in the cooking chamber, Control means for generating an exhaust control signal according to a key signal input through a key input means or a selected cooking course; And an exhaust fan driving means for blowing air in the cooking chamber to the outside according to the exhaust control signal of the control means. The method of claim 1, wherein the exhaust fan drive unit, A relay for switching a driving voltage of a predetermined level applied from the outside according to the exhaust control signal of the control means; A fan motor for generating rotational power by a driving voltage of a predetermined level applied by the switching operation of the relay; And an exhaust fan configured to rotate by the rotational power generated by the fan motor to blow air inside the cooking chamber to the outside.