KR100392458B1 - Microwave Oven and Control Method Thereof - Google Patents

Abstract

The present invention relates to a microwave oven having a cooking chamber in which an inlet and an exhaust port are formed, wherein an ignition detection sensor detects ignition in the cooking chamber, an open position for opening any one of the inlet and exhaust ports, and a closed position for closing. A shielding member which is movable, a driving means for opening and closing the shielding member, and whether or not the ignition is fired in the cooking chamber based on a detection signal from the ignition detecting sensor, and when the ignition is determined, the shielding member is moved to the closed position. It characterized in that it comprises a control unit for controlling the drive means to. Accordingly, it is possible to provide a microwave oven that detects and suppresses ignition in the cooking chamber and prevents electronic parts in the main body from being damaged by a flame.

Description

Microwave Oven and Control Method {Microwave Oven and Control Method Thereof}

The present invention relates to a microwave oven, and more particularly, to a microwave oven having a fire prevention blocking system.

In general, a microwave oven has a cooking chamber in which an intake port and an exhaust port are formed in a main body, and is a cooking utensil for cooking using a microwave and a direct heating device mounted in the cooking chamber.

6 is a perspective view showing a conventional microwave oven. As shown, the microwave oven is provided on the main body 101 having the cooking chamber 105, the door 103 attached to the front opening side of the main body 101, and the side of the main body 101 to mount the electronic components. It has a part chamber (not shown).

The main body 101 is provided with a cooking chamber 105 of a space in which a front surface is opened to cook food, and on one side of the front opening of the main body 101, a door 103 blocking the front opening is rotatably installed. It is. An operation panel 109 for selecting a cooking method is provided on an opening side surface of the main body 101, and a door button 111 for opening the door 103 is provided at a lower end of the operation panel 109.

The cooking chamber 105 is provided with a cooking tray 107 capable of supporting food on a bottom surface thereof, and an inlet port 113 for inhaling air into the cooking chamber 105 is formed on a side wall thereof. An exhaust port 115 capable of exhausting the air in the 105 is formed. The grill heater 119 is provided on the cooking chamber upper wall to directly heat the food.

In the component chamber (not shown), a magnetron (not shown) for generating microwaves is provided, and a high voltage transformer (not shown) is mounted to apply a high pressure to the magnetron.

A conventional microwave oven having such a structure opens a door 103, puts food on the food tray 107, selects a cooking method from the operation panel 109, and starts cooking from the side of the cooking chamber 105. The food is cooked by the microwave and the direct heating of the grill heater 119. In this way, in order to discharge the steam generated from the food to the outside during cooking, the inside of the cooking chamber 105 is continuously vented through the inlet port 113 and the exhaust port 115.

However, in the conventional microwave oven, when the cooking chamber 105 overheats during cooking and a flame occurs in the food, air is supplied to the cooking chamber 105 through the intake port 113 which is always opened in the cooking chamber 105. In addition, since the flame is generated and spread to the outside through the inlet port 113 or the exhaust port 115, there is a high risk that the electronic components embedded in the component chamber are damaged by the flame.

Accordingly, an object of the present invention is to provide a microwave oven that can prevent the flame from spreading around by detecting the fire in the cooking chamber so that the intake and exhaust ports can be blocked.

1 is a front view of a microwave oven according to the present invention;

2 is a front sectional view of the microwave oven according to the present invention;

3 is an enlarged perspective view of an intake port of a microwave oven according to the present invention;

4 is a block diagram showing a control method of the microwave oven according to the present invention;

5 is a flowchart of a microwave oven according to the present invention;

6 is a front view of a conventional microwave oven.

* Explanation of symbols for the main parts of the drawings

1: body 3: door

5: cooking chamber 7: cooking tray

9: operation panel 10: parts room

11 door button 13 air intake

15: exhaust port 19: grill heater

21: high voltage transformer 23: shielding member

25: sliding guide 27: ignition detection sensor

29: solenoid

The object of the present invention is a microwave oven having a cooking chamber in which an inlet and an exhaust port are formed, an ignition detecting sensor for detecting ignition in the cooking chamber, a sliding guide formed at one edge of the inlet and exhaust port, And a shielding member which is slid along the sliding guide, the shielding member being movable between an open position of opening any one of the inlet and the exhaust port and a closed position of closing, drive means for opening and closing the shielding member, and the fire detection sensor. It is determined by the microwave oven including a control unit for determining whether to ignite in the cooking chamber based on the detection signal, the control unit for controlling the driving means to move the shielding member to the closed position if it is determined that the ignition.

Here, a temperature sensor may be employed as the ignition detection sensor, and in this case, the controller determines that the ignition state is when the temperature detected by the temperature sensor is equal to or higher than a predetermined value.

On the other hand, a gas detection sensor may be employed as the ignition detection sensor.

The apparatus may further include a sliding guide formed at one edge of one of the inlet and the exhaust port, and the shielding member may be a plate member which slides along the sliding guide to lubricate and open the shielding member.

In addition, the driving means is preferably a solenoid for sliding opening and closing the shield member in the horizontal direction.

The purpose is According to the present invention, a control method of a microwave oven having a cooking chamber having an inlet and an exhaust port, the method comprising: detecting whether the ignition is in the cooking chamber and shielding at least one of the inlet and the exhaust port when the ignition is detected. It is also achieved by a method for controlling a microwave oven.

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

1 is a perspective view of a microwave oven according to the present invention, Figure 2 is a front sectional view of the microwave oven according to the present invention. As shown, the microwave oven according to the present invention is rotatably attached to the main body 1, the front surface of which is opened and the cooking chamber 5 is formed, and the side of the main body 1, the cooking chamber 5 of the main body 1 The side of the main body 1 located behind the operation panel 9, and has a door 3 for blocking the front opening and an operation panel 9 installed at the side of the cooking chamber 5 to select a cooking method. The component chamber 10 in which the electronic component was mounted is provided.

The inlet port 13 is formed in the side wall surface of the cooking chamber 5, and the exhaust port 15 is formed in the rear wall surface of the cooking chamber 5, supplying outside air into the cooking chamber 5, Can be discharged to the outside. The inlet 13 is provided with a blowing fan 17 at one side of the upper end of the rear wall of the main body, which is an end portion of the flow path through which air flows, so that outside air may be introduced into the cooking chamber 5. Although not shown, the exhaust port 15 is also provided with a shielding member.

In addition, an ignition detection sensor 27 is attached to an upper end of the cooking chamber 5 adjacent to the inlet 13, so that the flame in the cooking chamber 5 can be detected. The ignition detection sensor 27 may be installed at any position that can effectively monitor the inside of the cooking chamber 5, and is equipped with a temperature sensor that detects that the surrounding temperature is increased during ignition.

In the component chamber 10, a magnetron 20 is provided on the side wall of the cooking chamber 5, and a high pressure transformer 21 for converting a voltage to be applied to the magnetron 20 into a high voltage is mounted on the bottom surface of the cooking chamber 5. A control unit (not shown) for comparing the signals sensed by the sensor 27 to determine whether to ignite the predetermined value or more and to close the intake port 13 and the exhaust port 15 is mounted.

3 is a perspective view of a shield member of the microwave oven according to the present invention. As shown in the drawing, the shielding member 23 is formed in a rectangular rectangular plate shape, and is arranged on the outer side wall of the cooking chamber 5 at the opening end of the inlet 13 so as to transversely block the opening. Sliding guide 25 for accommodating the upper and lower edges of the shielding member 23 to enable the member 23 to slide between the open position and the closed position. And, the side of the shield member 23 is provided with a solenoid 29 for driving to open and close the shield member 23, it is possible to slide the shield member 23 between the open position and the closed position. Although not shown in the figure, the shield member 23 and the solenoid 29 are also provided in the exhaust port 15.

Figure 4 is a block diagram showing a control method of the microwave oven according to the present invention. As shown, an ignition detection sensor 27 that detects ignition in the cooking chamber, a control unit (not shown) that determines the ignition and closes one of the inlet and exhaust ports, and an inlet port by a closing signal from the control unit. It consists of the solenoid 29 and the shielding member 23 which close any one of 13 and the exhaust port 15. As shown in FIG.

5 is a flowchart illustrating a control method of the microwave oven according to the present invention. As shown, it comprises a fire detection step (S1), and if it is determined that the ignition is to block the inlet or exhaust port (S2).

In the ignition detection step (S1), the ignition detection sensor 27 in the cooking chamber 5 detects a state in the cooking chamber 5 and sends a temperature detection signal to the controller. Then, the temperature detection signal transmitted from the ignition detection sensor 27 is received by the control unit and compared with a predetermined reference value. If the detection signal is greater than or equal to a predetermined value, the control unit sends a driving signal to operate the solenoid 29 by determining that it is ignition.

In the inlet and exhaust port blocking step (S2), the driving means 29 is actuated by a signal transmitted from the control unit to the solenoid 29 so that the shielding member 23 moves to the closed position. Is closed.

The microwave oven of the present invention having such a configuration opens the door 3 and places the food in the cooking tray 7, and then selects a cooking method and cooks the cooking chamber due to overheating of the cooking chamber 5. 5) If a flame occurs inside, the fire detection sensor 27 installed in the cooking chamber 5 detects the flame and sends a temperature detection signal to the controller. When the value of this signal is detected to be higher than a predetermined reference value, the controller determines that a flame has occurred in the cooking chamber 5 and sends a closing signal to the solenoid 29 provided in the inlet 13 and the exhaust port 15. When the solenoid 29 receives the closing signal, the shield member 23 is driven to the closed position to close the inlet port 13 and the exhaust port 15. Thus, the flame is prevented from spreading to the component chamber 10 outside the cooking chamber 5 to which the electronic component is mounted.

As described above, the microwave oven according to the present invention blocks the intake port 13 and the exhaust port 15 through which air can be introduced, even if a flame is generated in the cooking chamber 5, thereby preventing the body 1 of the main body 1 on which the electronic component is mounted. The spread of the flame to the component chamber 10 can be prevented, and since the inside of the cooking chamber 5 is sealed, the extinguishing effect of suppressing the flame can be incidentally achieved by blocking the flammable gas from the outside.

On the other hand, the shielding member 23 may use a completely closed butterfly valve, the drive means may be a mechanical switch using a motor and a cam in addition to the solenoid (29).

In addition, the ignition detection sensor 27 may be provided with a gas detection sensor that can detect the gas generated during the combustion, such as CO and CO2 gas.

As described above, according to the present invention, the shielding member is closed on the intake and exhaust ports formed in the cooking chamber of the microwave, the shielding member capable of closing the intake and the exhaust port, and the shielding member based on the coral of the fire detection sensor. By providing a control unit capable of providing a microwave oven, the air inlet and the exhaust port may be closed when the flame is generated in the cooking chamber to prevent damage to the electronic component due to the flame.

Claims (8)

In a microwave oven having a cooking chamber having an inlet and an exhaust port, A fire detection sensor for detecting fire in the cooking chamber; A sliding guide formed at one edge of the inlet and exhaust port; A shielding member that slides along the sliding guide and is movable between an open position of closing one of the inlet and exhaust ports and a closed position of closing; Drive means for opening and closing the shielding member; And a control unit for controlling whether the ignition in the cooking chamber is ignited based on a detection signal from the ignition detecting sensor, and controlling the driving means to move the shielding member to a closed position when it is determined that the ignition is made. delete delete delete The method of claim 1, The driving means is a microwave oven, characterized in that the solenoid. delete delete delete