KR0171336B1 - Temperature sensor of microwave oven - Google Patents

Abstract

The present invention relates to a method for controlling automatic cooking of a microwave oven. In particular, by detecting a temperature in a refrigerator using a temperature sensor during automatic cooking of a microwave oven, it is possible to prevent the microwave from malfunctioning due to deterioration of components due to high frequency heating. A first process of setting an optimum temperature according to a cooking function in which automatic cooking is started, a second process of determining whether the inside temperature detected by the temperature sensor after the cooking process is above the set optimum temperature, and the detected inside temperature When the temperature is higher than the set optimal temperature, it is determined that the fire is malfunctioning method of the microwave oven using a temperature sensor which is sequentially operated in a third process of determining that all functions are stopped.

Description

How to prevent malfunction of microwave oven using temperature sensor

1 is a block diagram of a microwave driving apparatus for the present invention.

2 is a flowchart illustrating a method of preventing malfunction of a microwave oven using a temperature sensor according to the present invention.

FIG. 3 is a detailed operation flowchart of the first process 100 of FIG.

4 is a detailed operation flowchart of the second process 200 of FIG.

FIG. 5 is a detailed operation flowchart of the third process 300 of FIG.

* Explanation of symbols for main parts of the drawings

1: key input unit 2: sensor detection unit

3: control unit 4: display unit

5: load driving unit

The present invention relates to a method for controlling automatic cooking of a microwave oven. In particular, by detecting a temperature in a refrigerator using a temperature sensor during automatic cooking of a microwave oven, the microwave oven can be prevented from malfunctioning due to deterioration of components due to high frequency heating. The present invention relates to a method of preventing malfunction of a microwave oven using a temperature sensor.

In general, a microwave oven is a multi-purpose bar that is equipped with a grill heater, a convection heater, and a convection fan in addition to the magnetron as a heating means. By driving the convection fan installed at the rear of the convection heater while driving at the same time by the convection motor, the hot air is circulated inside the cooking chamber to cook by the oven function.

When cooking food by heating the heating means such as magnetron and heater as described above, the automatic cooking control is to control the cooking time, that is, the heating time, the automatic cooking method and the program type by the sensor type There is an automatic cooking method by the sensor type. The automatic cooking method of the sensor type is an automatic cooking control method that automatically detects the temperature generated from the food according to the heating by using a temperature sensor and automatically controls the cooking time. Is an automatic cooking control method that finds a cooking time defined by an experiment in advance by manually inputting the cooking amount according to the cooking name and serving and performs heating control during the cooking time.

In this way, when the load in the cooking chamber causes no load due to evaporation or carbonization, the temperature of the magnetron thermostat and the cavity thermostat rises in conjunction with the temperature increase in the cooking chamber. When the temperature is reached, the bimetal is activated to turn the device off.

Such a microwave oven, which controls automatic cooking as described above, has a problem in that a microcomputer or a sensor malfunctions due to external noise, an abnormality in an internal circuit, etc., and a congestion phenomenon occurs due to a malfunction of the microwave oven. Due to this, there is a problem that a safety accident such as cooking failure and fire due to a high frequency output occurs, which may cause a failure of the product, thereby lowering the lifetime and reliability of the product.

Therefore, the present invention was devised to solve the above-mentioned problems of the prior art, and by detecting the temperature in the refrigerator by using a temperature sensor during automatic cooking of the microwave, the microwave oven malfunctioned due to deterioration of components due to high frequency heating. It is an object of the present invention to provide a method of preventing malfunction of a microwave oven using a temperature sensor so as to be prevented from occurring.

The present invention for achieving the object as described above, the first step of setting the optimum temperature according to the cooking function when the automatic cooking is started, and whether the internal temperature detected by the temperature sensor after the cooking progress is more than the set optimum temperature And a second process of determining and a third process of stopping all functions by judging it as a topic when the sensed internal temperature is higher than the set optimum temperature.

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

A microwave driving apparatus for the present invention, as shown in FIG. 1, includes a key input unit 1 for inputting various key signals to operate a microwave oven; A sensor detector (2) for sensing humidity, weight, temperature, and the like for cooking control according to a key signal input from the key input unit (1); A control unit (3) which receives various key signals of the key input unit (1) and controls cooking functions and overall functions of the microwave by the detection signal of the sensor detection unit (2); A display unit 4 which is controlled by the control unit 3 and shows various operation states, cooking times and other predetermined displays; Under the control of the control unit 3 is composed of a load driving unit 5 for driving various loads for cooking, such as a magnetron, a heater, a convection pan.

Referring to the operation and effect of the present invention using a microwave oven configured as described above in detail.

First, when automatic cooking is selected using the key input unit 1 of the microwave oven, the air is exhausted from the cooking chamber of the microwave through the temperature sensor of the sensor detecting unit 2 attached as a screw to the upper surface of the cooking chamber exhaust port side. Senses the temperature and inputs it to the controller 3.

Meanwhile, the controller 3 displays the cooking function according to the selection signal input from the key input unit 1 on the display unit 4 and drives the load driving unit 5 to advance the automatic cooking.

In the above state, the control unit 3 detects the cooking function currently in progress and detects the optimum temperature of the determined cooking function, and then, through the temperature sensor of the sensor detector 2 for each data, the optimum temperature corresponding to the cooking function. The abnormal state of the temperature sensor is determined by comparing with the detected current temperature.

For example, the optimum temperature for the oven function is 150 ° C in degrees Celsius, 300 ° F in degrees Fahrenheit, the optimum temperature for the grill function is 230 ° C or 446 ° F, and the temperature rise for the grill function is 260 ° C or 500 ° F, The controller 3 determines whether the temperature sensed by the sensor detector 2 matches the optimum temperature for each cooking function, and controls the load driver 5 to operate at a stable temperature.

At this time, when the temperature detected by the sensor detector 2 is higher than the optimum temperature for each cooking function, the controller 3 outputs a control signal to the load driver 5 to stop all operations, the sensor detector 2 By determining the cause of the error of the sensor detected through the display unit 4 can be informed to the user.

When the operation is shown in a flow chart as shown in Figure 2, the first process (100) for setting the optimum temperature according to the cooking function when automatic cooking is started; A second process of determining whether the inside temperature detected by the temperature sensor is higher than the set optimum temperature after the cooking process (200; and a third step of stopping all functions by determining that it is a fire if the detected inside temperature is higher than the set optimum temperature). Operation 300 proceeds sequentially.

As shown in FIG. 3, the first process 100 includes: a first step 101 of determining whether a high frequency output start flag is set in a convection mode; A second step 102 of detecting an optimum temperature of the oven function when not in the convection mode; A third step (103) of storing temperature data of the detected oven function in degrees Celsius and degrees Fahrenheit; A fourth step 104 of determining whether to be a grill function in the convection mode; A fifth step 105 of detecting an optimum temperature of the grill function which is not raised in the case of the grill function; A sixth step 106 of dividing the detected temperature data of the grill function into degrees Celsius and degrees Fahrenheit; The seventh step 107 of storing the high temperature data of the elevated grill function divided into Celsius and Fahrenheit is sequentially performed.

As shown in FIG. 4, the second process 200 includes a first step 201 of determining whether the sensor is open after determining the upper bit of the thermistor open counter based on the stored temperature data; A second step 202 of determining an upper bit of temperature data when the sensor is not open; A third step 203 of determining an intermediate bit when the upper bits of the temperature data are the same; If the intermediate bits of the temperature data are the same, the operation proceeds sequentially to a fourth step 204 of determining the lower bits.

As shown in FIG. 5, the third well 300 includes a first step 301 of stopping all functions to initialize a stop counter and clearing a high frequency output start flag; A second step 302 of detecting an error by setting an error occurrence and an initial buzzer; A third step 303 of determining a detected error and setting a corresponding error signal; A fourth step 304 of setting error 2 in case of failure or fire of the temperature sensor; A fifth step 305 of setting error 1 in case of overheating of the oven; Operation sequentially proceeds to a sixth step 306 of displaying the cause of the set error so that the user can recognize it.

As described in detail above, the present invention, by detecting the temperature in the refrigerator using a temperature sensor during automatic cooking of the microwave oven, it is possible to prevent the microwave from malfunctioning due to deterioration of the components by high frequency heating, By preventing the malfunction can improve the performance and life of the product, and thus there is an effect that can improve the consumer's reliability and purchasing power of the product.

Claims (1)

A method for controlling a microwave oven in which a temperature sensor is installed to measure a temperature in a cooking chamber of a microwave oven, the method comprising: determining a cooking mode started when cooking is started, and a temperature of three steps of high / medium / low for each cooking mode of the microwave oven Setting the range, detecting the inside temperature of the cooking chamber after cooking, comparing the high / medium / low three-step temperature range of the cooking mode with the detected inside temperature, and opening the temperature sensor by the stored temperature data. Determining whether the sensor is open by determining the upper bit, setting error3 if it is determined that the temperature sensor is open, and setting it to error2 by judging it as a temperature sensor failure or fire if the detected temperature is 'high' or higher, 'medium' 'If the range is determined to be overheating oven and set to error 1, if the' low 'range is determined to return to normal, In the step, when the error 1, 2, 3 is set, the microwave oven using the temperature sensor, characterized in that to stop all the functions, to send a warning sound corresponding to the determined error, and to display the cause of the error sequentially How to prevent malfunction.