KR19990060051A - Malfunction prevention device of microwave oven - Google Patents

Abstract

The disclosed microwave oven relates to a malfunction preventing apparatus for a microwave oven, which detects and displays a short state of a key input unit and prevents malfunction of a device through a reset function. According to the present invention, a plurality of operation keys including a reset key are provided to input an operation command by a user, and input an operation command of the key input unit to drive a load of a microwave oven, and detect a short state of the key input unit. The microcomputer is configured to reset the input power when the reset key is input and the display unit displays an operation state of the microwave oven under the control of the microcomputer, and displays an error message when the short state of the key input unit is detected. Therefore, it detects and displays a short state of a key input unit generated when moisture penetrates into the operation panel, and prevents malfunction of the device through a reset function.

Description

Malfunction prevention device of microwave oven

The present invention relates to a microwave oven, and more particularly, to a malfunction prevention apparatus of a microwave oven which detects and displays a short state of a key input unit and prevents a malfunction of a device through a reset function.

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 of a general microwave oven. 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 4 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 provided with a rotating plate 5 on which food to be cooked is placed on its bottom surface. The rotating plate 5 is a rotating plate driving unit 28 composed of a motor and gears not shown on the bottom surface thereof. 2 is provided to rotate the rotating plate 5 when 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 forced to blow the surrounding air to cool the magnetron 6, and the air guide 11 near the magnetron 6 is heated while passing through the magnetron 6 Induce air to the cooking chamber (2).

In addition, the operation panel 10 is typically provided on one side of the cooking chamber 2, but recently, a monitor look type microwave oven, etc., in which the operation panel 10 is installed below the cooking chamber 2, is also developed. It is used.

2 is a control block diagram showing the circuit configuration of the conventional microwave oven as described above. According to FIG. 2, a conventional microwave oven includes a key input unit 20 including various operation keys such as a time setting key 21, a temperature setting key 22, a menu selection key 23, and a start key 24. The key input section 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, Various loads such as the magnetron driver 26, the cooling fan driver 27, and the rotating plate driver 28, which will be described later, are operated / controlled by using the stored predetermined information, for example, information such as a cooking temperature and a cooking time.

That is, the magnetron drive unit 26 drives the magnetron 6 to generate microwaves, and the cooling fan drive unit 27 drives the cooling fan 9 for cooling the magnetron 6, and the rotary plate drive unit. Reference numeral 28 rotates the rotary plate 5 in which food is placed. Here, the magnetron driver 26 generates a high voltage through circuit elements such as the high voltage transformer 7 and the high voltage capacitor 8 shown in FIG. 1 and supplies the same to the magnetron 6 to supply microwaves of 2450 MHz. Generate. Accordingly, 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 29 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. On the other hand, the microwave oven may immediately perform a cooking operation according to the data previously stored in the microcomputer 25 by simply pressing the start key 24 to increase user convenience.

Accordingly, the microcomputer 25 detects each operation key input of the key input unit 20, and selectively operates the magnetron driver 26, the cooling fan driver 27, the rotary plate driver 28, and the like accordingly. The food inside the cooking chamber 2 is heated / cooked. That is, the commercial AC power input from the outside is boosted to a high voltage through the high voltage transformer 7 and the high voltage capacitor 8 shown in FIG. 1 and supplied to the magnetron 6, and thus a predetermined frequency from the magnetron 6 described above. (2450 MHz) microwaves are generated and emitted into the cooking chamber 2. In addition, a cooling fan 9 for cooling the magnetron 6 is driven.

In addition, by rotating the rotary dish 5, the food is placed, the microwaves emitted into the cooking chamber are irradiated evenly to the food, and the food is heated / cooked to an appropriate temperature. In addition, the display unit 29 displays the operation state and operation state of the microwave oven to inform the user.

However, such a conventional microwave oven generates a large amount of water when cooking food, and when such moisture penetrates into the operation panel, various operation keys of a key input unit are short-circuited and the overall operation function of the microwave oven malfunctions. There was this.

In addition, since the conventional microwave oven does not have a separate reset function when such a malfunction occurs, the conventional microwave oven has to be unplugged and then connected again.

Accordingly, the present invention has been made in order to solve the above-mentioned conventional problems, an object of the present invention is to detect a short state of the key input portion and display it, and also to prevent malfunction of the device through a reset function microwave oven To provide a malfunction preventing device of the.

1 is a partially cutaway perspective view of a typical microwave oven,

2 is a control block diagram showing a circuit configuration of a conventional microwave oven;

3 is a control block diagram showing a preferred embodiment of the malfunction prevention apparatus of the microwave oven according to the present invention.

Explanation of symbols on the main parts of the drawings

100: key input unit 105: reset key

110: microcomputer 120: magnetron drive unit

130: cooling fan drive unit 140: rotary plate drive unit

150: display unit

The malfunction prevention device of the microwave oven according to the present invention for realizing this is characterized in that a plurality of operation keys including a reset key are provided, and a key input unit for inputting an operation command by a user, Displaying the operation state of the microwave oven under the control of the microcomputer and the microcomputer to drive the load of the range and to detect the short state of the key input unit and to reset the input power when the reset key is input. It is composed of a display unit that displays an error message when a short state is detected.

Here, the microcomputer detects a short state of the key input unit when at least one of the plurality of operation keys is input for a predetermined time or more.

Therefore, it detects and displays a short state of a key input unit generated when moisture penetrates into the operation panel, and prevents malfunction of the device through a reset function.

Hereinafter, a preferred embodiment of a malfunction prevention apparatus of a microwave oven according to the present invention will be described in 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 preferred embodiment of the malfunction prevention apparatus of the microwave oven according to the present invention. Referring to FIG. 3, the key input unit 100 is operated by a user to provide a time setting key 101, a temperature setting key 102, a menu selection key 103, and an operation start signal to set cooking temperatures and times. Various operation keys such as a start key 104 and a reset key 105 for inputting are provided. In addition, the microcomputer 110 inputs an operation command of the key input unit 100 to drive a load of the microwave oven, and detects a short state of the key input unit 100 and input power when the reset key 105 is input. To reset it.

The loads driven by the control of the microcomputer 110 are composed of a magnetron driver 120, a cooling fan driver 130, and a rotary plate driver 140. The magnetron driver 120 drives the magnetron 6 to generate microwaves, and the cooling fan driver 130 drives the cooling fan 9 for cooling the magnetron 6, and the rotation plate driver 140. ) Rotates the rotary dish 5 is placed food.

The display unit 150 displays an operation state of the microwave oven under the control of the microcomputer 110, and displays an error message when the short state of the key input unit 100 is detected, together with the key input unit 100. It is preferably formed in the operation panel 10 shown in FIG.

Referring to the operation of the present invention configured as described in more detail as follows.

In the state in which the door 4 is opened by the user and the cooking chamber 2 is opened, a cooking container containing food is placed in the upper part of the rotary dish 5 inside the cooking chamber 2 through the front of the cabinet 1. Thereafter, the microwave oven is operated as the user operates the key input unit 100 while the door 4 is closed. That is, the user can set the temperature and time by using the temperature setting key 102 and the time setting key 101, or simply select a predetermined menu by using the menu selection key 103, and the desired cooking temperature and cooking time. After setting, the start key 104 starts the operation of the microwave oven. On the other hand, the microwave oven may immediately perform a cooking operation according to the data previously stored in the microcomputer 110 by simply pressing the start key 104 to increase user convenience.

Accordingly, the microcomputer 110 detects each operation key input of the key input unit 100, and selectively operates the magnetron driver 120, the cooling fan driver 130, the rotary plate driver 140, and the like. The food inside the cooking chamber 2 is heated / cooked, and the heating / cooking operation of the food through each of the components is the same as described with reference to FIG. 1, and thus a detailed description thereof will be omitted.

On the other hand, during the cooking operation of the microwave oven as described above, moisture may penetrate into the operation panel 10 and various operation keys 101 to 105 may be shorted. At this time, the microcomputer 110 enters a short state of the key input unit 100 when at least one of the plurality of operation keys 101 to 105 is input for a predetermined time (for example, 120 seconds) or more. To be detected.

Therefore, the microcomputer 110 displays an error message according to the short state of the key input unit 100 through the display unit 150 to recognize the user in such a state. Subsequently, when the user recognizes the error state of the microwave oven through the display unit 150 and inputs the reset key 105 provided on the operation panel 100, the microcomputer 110 receives the reset key 105 when the user inputs the reset key 105. By resetting the input power supplied to the microwave oven to prevent malfunction of the device.

As described above, according to the apparatus for preventing malfunction of the microwave oven according to the present invention, it detects a short state of a key input unit generated when moisture penetrates the manipulation panel and displays the short state, thereby informing the user of an error state.

In addition, when the malfunction of the device occurs, it is possible to immediately reset the device by inputting the reset key provided on the operation panel has another effect that the operation function is very convenient.

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 (2)

A key input unit provided with a plurality of operation keys including a reset key to input operation commands by a user; A microcomputer for driving a load of the microwave oven by inputting an operation command of the key input unit to sense a short state of the key input unit and to reset input power when the reset key is input; And And a display unit which displays an operation state of the microwave oven under the control of the microcomputer, and displays an error message when detecting a short state of the key input unit. The apparatus of claim 1, wherein the microcomputer detects a short state of the key input unit when at least one of the plurality of operation keys is input for a predetermined time or more.