KR100283655B1 - Self-diagnosis method of cooking state of microwave oven - Google Patents

Abstract

A cooking self-diagnosis method of a microwave oven is disclosed. The present invention discloses a data input step of receiving a cooking start command after setting a cooking temperature, a cooking time and a temperature variable ΔT, and detecting an initial cooking temperature T1 in a state in which a cooking start command is input. An initial driving step of driving the magnetron for a time and a current cooking temperature T2 after a predetermined time elapse, and comparing the magnitudes with the initial cooking temperature T1 plus the current cooking temperature T2 and the temperature variable ΔT. If it is determined by the temperature comparison step and the temperature comparison step that the current cooking temperature T2 is equal to or less than the initial cooking temperature T1 plus the temperature variable ΔT, driving stop and error for stopping the magnetron and displaying an error. The display step is included. In addition, if it is determined by the temperature comparison step that the current cooking temperature (T2) is not less than the initial cooking temperature (T1) plus the temperature variable (ΔT), it is preferable to further include a normal driving step for performing normal cooking. . Therefore, by detecting the cooking temperature of a certain time to determine whether there is an abnormality of the cooking state, and immediately display this state, the user can quickly determine whether there is an abnormality of the cooking state of the microwave oven and cope with it appropriately.

Description

Self-diagnosis method of cooking state of microwave oven

The present invention relates to a cooking state self-diagnosis method of a microwave oven, and more particularly, by detecting a cooking temperature of a predetermined time to determine whether there is an abnormality of a cooking state, and to display the state. It is about a diagnosis method.

In general, a microwave oven is a device that heats / cooks food using microwaves, and includes a conventional high voltage transformer and a magnetron. This high voltage transformer generates a predetermined high voltage to drive the magnetron, which emits microwaves of high frequency (approximately 2450 MHz) in a confined space where food is stored. The microwave thus vibrates the water molecules contained in the food, and the food is heated / cooked by molecular frictional heat generated by the vibration of the water molecules.

1 is a partially cutaway perspective view illustrating a conventional microwave oven, and FIG. 2 is a control block diagram of FIG. 1.

According to Figure 1, the cabinet 20 forming the appearance of the microwave oven is divided into a left and right space is provided with a cooking chamber 22, the front is open on one side, the lamp 26, the fan motor 27, the magnetron (on the other side) The apparatus room 23 in which various electric appliances, such as MGT), a high voltage transformer (HVT), and a high voltage capacitor (HVC), is installed is provided. An operation panel 25 is provided on the front surface of the apparatus room 23 for operating the microwave oven and displaying the state thereof.

In addition, the door 21 that opens and closes the front of the cooking chamber 22 is rotatably fixed to one side of the cabinet 20, and the rotating dish 24 in which food to be cooked is placed in the bottom surface of the cooking chamber 22. Is installed. The rotary plate 24 is rotated by a drive motor and gears not shown on the bottom surface of the cabinet 20 during food cooking to increase cooking efficiency.

According to FIG. 2, an input unit 10 for receiving various operation commands of a user, a cooking temperature detection unit 11 for detecting a temperature inside a cooking chamber, and input signals of the input unit 10 and cooking temperature detection unit 11 are provided. Accordingly, the microcomputer 12 for controlling the operating state of the load driver 13 to be described later is provided.

In addition, the load driver 13 controls microwave loads such as the lamp 2, the fan motor 3, the magnetron MgT, and the driving motor (not shown) described above with reference to FIG. 1 under the control of the microcomputer 12. Run or stop. The display unit 14 displays various operations and operation states of the microwave oven under the control of the microcomputer 12. The display unit 14 and the input unit 10 are preferably installed in the control panel 25 described above with reference to FIG.

3 is a flowchart illustrating a cooking method of a conventional microwave oven, and the operation of the conventional microwave oven configured as described above is as follows.

First, the user opens the door 21 and places the food to be cooked in the state in which the cooking chamber 22 is opened on the upper side of the rotating dish 24 inside the cooking chamber 22 through the front of the cabinet 20. Close 21. Thereafter, the user sets a cooking temperature and a cooking time according to the type of food through the input unit 10 of the operation panel 25, and inputs a cooking start command (S101 to S102).

The microcomputer 12 detects such a stop start command and operates the load driver 13 accordingly to load microwave loads such as a lamp 26, a fan motor 27, a magnetron (MGT) and a driving motor (not shown). Drive it. Therefore, the microwaves generated by the magnetron MTG are emitted into the cooking chamber 22, whereby the food is heated inside (S103).

In this way, while the food is being heated, the cooking temperature detector 11 detects the temperature inside the cooking chamber 22 and inputs the cooking temperature to the microcomputer 12 (S104).

The microcomputer 12 compares / determines whether the currently detected cooking temperature is equal to or greater than the preset cooking temperature by the user (S105).

Here, when it is determined that the cooking temperature detected at present is not higher than the preset cooking temperature, the microcomputer 12 repeatedly performs the magnetron driving step S103 and the cooking temperature detecting step S104, while the cooking temperature currently detected is increased. If it is determined that the preset cooking temperature or more, the cooking time is counted (S106). In addition, the display unit 14 displays the cooking time counted in this way.

Subsequently, when a predetermined cooking time set by the user is completed, the microcomputer 12 stops the driving of the magnetron MTG and various loads through the load driving unit 13 to end all cooking operations of the microwave oven ( S107 to S108).

However, in the conventional microwave cooking method, when the magnetron fails to emit microwaves at a proper output due to an abnormal operation, the food in the cooking chamber may not be cooked or cooked at all. There was a problem that the user can not immediately determine this state.

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, by detecting the cooking temperature of a certain time to determine whether there is an abnormality of the cooking state, and also of the microwave oven to display such a state The present invention provides a self-diagnostic method of cooking.

1 is a partially cutaway perspective view showing a conventional microwave oven,

2 is a control block diagram of FIG. 1;

3 is a flowchart illustrating a cooking method of a conventional microwave oven,

4A and 4B are flowcharts showing a preferred embodiment of a cooking state self-diagnosis method of a microwave oven according to the present invention.

Explanation of symbols on the main parts of the drawings

10: input unit 11: cooking temperature detection unit

12: microcomputer 13: load driving unit

14: display unit 22: cooking chamber

In order to achieve the above object, a cooking state self-diagnosis method of a microwave oven according to the present invention includes a data input step of receiving a cooking start command after setting a cooking temperature, a cooking time and a temperature variable ΔT, and starting the cooking start. After detecting the initial cooking temperature (T1) in the state that the command is input, the initial driving step of driving the magnetron for a predetermined time, and the current cooking temperature (T2) after a predetermined time elapses, and the current cooking temperature (T2) and Comparing the size with the initial cooking temperature (T1) plus the temperature variable (ΔT) and the current cooking temperature (T2) by the temperature comparison step is less than the initial cooking temperature (T1) plus the temperature variable (ΔT). If it is determined, driving stop and error display steps of stopping the magnetron and displaying an error are included.

In addition, when it is determined by the comparison step that the current cooking temperature (T2) is not less than the initial cooking temperature (T1) plus the temperature variable (ΔT), it is preferable to further include a normal driving step for performing normal cooking.

Therefore, by detecting the cooking temperature of a certain time to determine whether there is an abnormality of the cooking state, and immediately display this state, the user can quickly recognize the cooking state abnormality of the microwave oven and cope with it appropriately.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of a cooking state self-diagnosis method of a microwave oven according to the present invention, the same components as in the prior art will be described by applying the same reference numerals.

Figures 4a and 4b is a flow chart showing a preferred embodiment of the cooking state self-diagnosis method of the microwave oven according to the present invention, the operation of the preferred embodiment according to the present invention with reference to this in more detail as follows.

First, the user sets a cooking temperature, a cooking time and a temperature variable ΔT through the input unit 10, and then performs a data input step of inputting a cooking start command (S201 to S202). These various data are input to the microcomputer 12, where the temperature variable ΔT refers to a temperature change value that can change regardless of the lamp 26 and other food cooking inside the cooking chamber 22.

The microcomputer 12 detects the initial cooking temperature T1 inside the cooking chamber 22 through the cooking temperature detector 11 while the cooking start command is input, and then controls the load driver 13 to control the magnetron for a predetermined time. An initial driving step of driving the MTG is performed (S203 to S206). Herein, the microcomputer 12 counts the driving time of the magnetron MTG to determine whether a predetermined predetermined time has elapsed.

Thereafter, when a predetermined time elapses, the microcomputer 12 detects the current cooking temperature T2 through the cooking temperature detector 11, and adds the current cooking temperature T2 and the temperature variable ΔT to the initial cooking temperature ( A temperature comparison step of comparing the size with T1) is performed (S207 to S208).

Therefore, when it is determined by the comparison step that the current cooking temperature T2 is less than or equal to the initial cooking temperature T1 plus the temperature variable ΔT, the microcomputer 12 controls the load driver 13 to control the magnetron MTG. ) Is stopped, and the drive stop and error display steps of displaying an error are performed through the display unit 14 (S209 to S210).

On the other hand, when the microcomputer 12 determines that the current cooking temperature T2 is not less than the initial cooking temperature T1 plus the temperature variable ΔT by the comparison step, the microcomputer 12 performs the normal driving step of performing normal cooking. (S211 to S215). In addition, the process of the normal cooking is similar to the conventional cooking method (S104 to S108) described with reference to Figure 3, the detailed description thereof will be omitted here.

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 are intended to fall within the scope of the claims set forth.

As described above, according to the cooking state self-diagnosis method of the microwave oven according to the present invention, by detecting a cooking temperature for a predetermined time and judging whether there is an abnormality in the cooking state, and immediately displaying such a state, There is an effect that can quickly recognize the cooking state abnormalities of the microwave oven and cope with them appropriately.

Claims (2)

A data input step of inputting a cooking start command after setting a cooking temperature, a cooking time, and a temperature variable ΔT; An initial driving step of driving the magnetron for a predetermined time after detecting the initial cooking temperature T1 in a state in which a stop start command is input; A temperature comparison step of detecting a current cooking temperature T2 after a predetermined time elapses and comparing the magnitude of the current cooking temperature T2 with the initial cooking temperature T1 plus the temperature variable ΔT; And If it is determined by the temperature comparison step that the current cooking temperature (T2) is equal to or less than the initial cooking temperature (T1) plus the temperature variable (ΔT), the driving stop and error display step of stopping the magnetron to display an error Self-diagnosis method of cooking state of a microwave oven, characterized in that. The method of claim 1, further comprising a normal driving step of performing normal cooking when it is determined by the temperature comparing step that the current cooking temperature T2 is not less than or equal to the initial cooking temperature T1 plus the temperature variable ΔT. Cooking state self-diagnosis method of a microwave oven, characterized in that.