KR100252323B1 - Safety apparatus of a microwave oven and control method thereof - Google Patents

Abstract

PURPOSE: A safety device of a microwave oven and a method for controlling the same are provided to increase the safety of the operation of the microwave oven with a main starting key and an auxiliary key, and to prevent the loss of electric power and overload of the microwave oven by preventing erroneous operation. CONSTITUTION: A safety device of a microwave oven includes a key input part(40) operated by a user for setting cooking conditions and outputting an operation starting signal through a plurality of starting keys, a load driving part(47) driving various loads necessary for driving the microwave oven, and a micro computer(46) operating the load driving part by the cooking conditions of the key input part and the operation starting signal for controlling every operations according to the cooking operation. A method for controlling the safety device includes the steps of judging whether a main starting key(44) is input by key input, driving the microwave oven if an auxiliary key(45) is input within a predetermined time after the main key is input, and returning to the initial state if the auxiliary key is not input within the predetermined time after the main key is input.

Description

Microwave Safety Device and Control Method

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave oven, and more particularly, to a safety device of a microwave oven and a method of controlling the same, in which the safety of operation is doubled by configuring the start key of the microwave oven in two steps.

2. Description of the Related Art In general, a microwave oven is a device for heating / cooking food using microwaves, and FIG. 1 shows a partially cutaway perspective view showing the appearance of a typical microwave oven and a mounting state of each component.

According to FIG. 1, the cabinet 1, which is divided into left and right spaces and forms an appearance of a microwave oven, has a cooking chamber 2 having an open front at one side thereof, and an apparatus chamber 3 having various circuit devices installed at the other side thereof. Prepared. In addition, the door 3 that opens and closes the front of the cooking chamber 2 is rotatably fixed to one side of the cabinet 1.

The cooking chamber 2 is rotatably provided with a rotary plate 5 on which the food to be cooked is placed on its bottom surface, and the rotary plate 5 is a rotary plate composed of motors and gears not shown on the bottom thereof. A driving unit 33 (shown in FIG. 2) is provided to rotate the rotary dish 5 during cooking.

Meanwhile, the apparatus chamber 3 is provided with a magnetron 6 for generating microwaves, a high voltage transformer 7, a high pressure capacitor 8, and a cooling fan 9 for cooling the magnetron 6. The front panel is provided with an operation panel 10 for operating these devices and displaying their status.

Here, the cooling fan 9 is forcibly blown air to cool the magnetron 6, and the air guide 11 to guide the heated air to the cooking chamber 2 through the heat exchange action is It is provided near the magnetron 6.

2 is a control block diagram of such a conventional microwave oven. According to FIG. 2, a conventional microwave oven includes a key input unit 20 including a time setting key 21, a temperature setting key 22, a menu selection key 23, and a start key 24. The key input unit 20 is formed in the operation panel 10 shown in FIG.

In addition, the microcomputer 25 for controlling the driving of various loads for the cooking operation in accordance with the key operation of the key input unit 20 is provided, the microcomputer 25 controls the overall cooking operation of the microwave oven, in advance, The operation of the load driver 26 to be described later is controlled by using stored predetermined information, for example, information such as a cooking temperature and a cooking time.

The load driver 26 includes a magnetron driver 27 for driving the magnetron 6 to generate microwaves, a cooling fan driver 28 for driving the cooling fan 9, and a rotating plate driver for rotating the rotary plate 5. It consists of 29 to perform the cooking operation according to the drive command of the control unit 20.

Here, the magnetron driver 27 generates microwaves of 2450 MHz through circuit elements such as the high voltage transformer 7, the high voltage capacitor 8, and the magnetron 6 shown in FIG. Release to the inside.

Along with this, high heat is generated in the magnetron 6, and the high heat generated in this way is forcedly cooled by the cooling fan 9. In addition, the display unit 30 displays the operation state and the operation state as described above, and is preferably formed on the operation panel 10 shown in FIG. 1 together with the key input unit 20.

In the conventional microwave oven configured as described above, a cooking vessel containing food in a state where the door 4 is opened by the user and the cooking chamber 2 is opened is rotated inside the cooking chamber 2 through the front of the cabinet 1. (5) It is placed on the top.

Thereafter, the microwave oven is operated as the user operates the key input unit 20 while the door 4 is closed. That is, the user can set the temperature and time by using the temperature setting key 22 and the time setting key 21 or simply select a predetermined menu by using the menu selection key 23, and the desired cooking temperature and cooking time. After setting, the operation of the microwave oven is started with the start key 24.

Accordingly, the microcomputer 25 detects the input of the key input unit 20, and operates the magnetron driver 27, the rotary plate driver 29, the cooling fan driver 28, and the like according to the inside of the cooking chamber 2. Heat / cook food.

That is, the commercial AC power input from the outside is supplied to the magnetron 6 via the high voltage transformer 7 and the high voltage capacitor 8 shown in FIG. 1, and thus the predetermined frequency (2450 MHz) from the magnetron 6 described above. Microwaves are generated and emitted into the cooking chamber (2).

In addition, the cooling fan 9 for cooling the magnetron 6 is driven, the food is heated / cooked to an appropriate temperature by rotating the rotary plate 5 is placed food.

In addition, the display unit 30 informs the user by displaying the operation state and operation state of the microwave oven on the operation panel 10.

On the other hand, the microwave oven may immediately perform a cooking operation according to the basic data previously stored in the microcomputer 25 by simply pressing the start key 24 to increase user convenience.

However, due to such simplicity of the function, a malfunction may occur due to a user mistake or a mischief of a child. Therefore, there is also a microwave oven equipped with a safety key having a separate lock / release function in the key input unit, such a microwave oven is expected to malfunction due to the safety function is released as soon as the safety key is pressed.

Therefore, the conventional microwave oven as described above may cause a further malfunction due to the simplicity of the function, there was a problem that can not actively prevent such a malfunction.

In addition, there is another problem that unnecessary power is lost due to malfunction of the microwave oven and overload or overheating of the device occurs.

Accordingly, an object of the present invention is to provide a safety device for a microwave oven, which doubles the safety of operation by constructing the start key of the microwave oven in two stages. have.

Another object of the present invention is to provide a control method for more efficiently controlling the safety device of the microwave oven according to the present invention.

1 is a partially cutaway perspective view showing the appearance of a typical microwave oven and the mounting state of each component,

2 is a control block diagram showing a conventional microwave oven,

3 is a control block diagram showing a safety device of a microwave oven according to the present invention;

4 is a control flowchart illustrating a method for controlling a safety device of a microwave oven according to the present invention.

Explanation of symbols on the main parts of the drawings

40: key input section 41: time setting key

42: Temperature setting key 43: Menu selection key

44: primary start key 45: secondary start key

46: microcomputer 47: load driving unit

48: magnetron drive unit 49: cooling fan drive unit

50: rotation plate driving unit 51: display unit

A feature of the safety device of the microwave oven according to the present invention for realizing this is a key input unit which is operated by a user to set cooking conditions, and outputs an operation start signal through a plurality of start keys, and various necessary for driving the microwave oven. And a microcomputer that controls the overall operation according to the cooking operation by operating the load driving unit according to the load driving unit for driving the load and the cooking conditions and the operation start signal of the key input unit.

The microcomputer may further include a display unit configured to output an operation state and an operation state of the microwave oven under the control of the microcomputer.

According to a control method of a safety device for a microwave oven according to an embodiment of the present invention, a control method of driving a microwave oven according to input of these keys, having a primary start key and an auxiliary start key, comprising: a predetermined time after the primary start key is input; The microwave oven is driven only when the auxiliary start key is input within the first process, and the first process determines whether the main start key is input by key input, and a predetermined time after the main start key is input by the first process. A second process of driving the microwave when an auxiliary start key is entered in the second process and a third process of returning to an initial state when the auxiliary start key is not input within a predetermined time after the primary start key is input by the first process; It consists of.

Therefore, the safety of the microwave oven is doubled by the main start key and the auxiliary start key composed of two steps, and the malfunction of the microwave is prevented, thereby preventing unnecessary power loss and overload or overheating of the device. .

Hereinafter, a preferred embodiment of a safety device and a control method of a microwave oven according to the present invention will be described in more detail with reference to the accompanying drawings, the same components as in the prior art will be described with the same reference numerals.

3 is a control block diagram showing a safety device of the microwave oven according to the present invention, Figure 4 is a control flowchart showing a method for controlling the safety device of the microwave oven according to the present invention.

According to FIG. 3, the key input unit 40 is operated by the user to operate the time setting key 41, the temperature setting key 42, the menu selection key 43, and two steps in order to set the cooking temperature and time. The main start key 44 and the sub start key 45 for inputting the start signal are provided.

The load driving unit 47 drives various loads to perform heating / cooking operation of the microwave oven, and a magnetron driving unit 48 driving the magnetron 6 shown in FIG. 1 and a cooling fan driving the cooling fan 9. The driving unit 49, the rotary plate driving unit 50 for rotating the rotary plate 5 and the like.

The display unit 51 displays the operation state and cooking state of the microwave oven, and is formed on the operation panel 10 shown in FIG. 1 together with the key input unit 40.

Here, the magnetron driver 48 generates microwaves through circuit elements such as the high voltage transformer 7, the high voltage capacitor 8, and the magnetron 6 shown in FIG. 1, and emits them into the cooking chamber 2. In this case, the high heat generated in the magnetron 6 is forcedly cooled by the cooling fan 9.

If described in more detail with reference to Figure 4 the operation of the present invention configured as follows.

First, as the door 4 is opened from the cabinet 1 by the user, a cooking container containing food through the front of the cabinet 1 enters the inside of the cooking chamber 2 and is placed on the top of the rotary dish 5. .

Thereafter, the microwave oven is operated by operating the key input unit 40 of the operation panel 10 while the door 4 is closed. At this time, the user selects the temperature setting key 42, the time setting key 41, or the menu. The desired cooking temperature and time are set using the key 43 and the like.

In the state where such a condition is selected, the user first inputs the main start key 44, and continuously inputs the auxiliary start key 45 within a predetermined time (for example, 3 seconds) to output an operation start signal, and then the microcomputer 46 By detecting this, the cooking operation of the microwave is started.

That is, as shown in FIG. 4, the microcomputer 46 determines whether the main start key 44 has been input in response to a key input (S101 ˜ 102), and the main start key 44 is determined. If it is input, it is determined again whether the auxiliary start key 45 is input (103).

When the auxiliary start key 45 is input within a predetermined time (3 seconds) after the main start key 44 is input, the microcomputer 46 determines that it is a normal state and drives the load driver 47 to cook. The second process of driving the microwave oven is performed until the end (S104 to S108).

Here, the microcomputer 46 controls the load driver 47 according to the signal of the key input unit 40, and operates the magnetron driver 48, the cooling fan driver 49, and the rotary plate driver 50. The food inside the cooking chamber 2 is heated / cooked. In addition, the heating / cooking operation of the food is the same as described in detail with reference to Figs. 1 to 2, so the detailed description thereof will be omitted.

On the other hand, if the auxiliary start key 45 is not input within the predetermined time (3 seconds) by the second process, the microcomputer 46 determines that it is a malfunction and stops all functions and starts the key input process in the initial state ( By returning to step S101, malfunction of the device due to a user's mistake or the like is prevented.

As described above, according to the safety device and control method of the microwave oven according to the present invention, there is an effect of doubling the safety in the operation of the microwave by the main start key and the auxiliary start key composed of two steps.

In addition, by preventing malfunction of the microwave oven, there is another effect of preventing unnecessary power loss and overload or overheating of the device.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

Claims (4)

A key input unit manipulated by a user to set cooking conditions and output an operation start signal through a plurality of start keys; A load driver for driving various loads required for driving the microwave oven; And Safety device for a microwave oven, characterized in that the microcomputer for controlling the overall operation according to the cooking operation by operating the load driving unit in accordance with the cooking conditions and the operation start signal of the key input unit. The safety device of a microwave oven according to claim 1, further comprising a display unit for outputting an operation state and an operation state of the microwave oven under the control of the microcomputer. A control method comprising a primary start key and an auxiliary start key to drive a microwave oven according to input of these keys, A method of controlling a safety device of a microwave oven, wherein the microwave oven is driven only when the auxiliary start key is input within a predetermined time after the primary start key is input. 4. The method of claim 3, further comprising: a first step of determining whether a primary start key is input by a key input; A second step of driving the microwave oven when a sub start key is input within a predetermined time after the main start key is input by the first step; And And a third process of returning to an initial state when the auxiliary start key is not input within a predetermined time after the primary start key is input by the first process.

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