KR100257623B1 - Apparatus for sensing temperature and method for controlling it of microwave oven when foods are cooked continually - Google Patents

Abstract

PURPOSE: A temperature detecting device when a microwave oven performs a continuous cooking and a controlling method thereof are provided to control to perform cooking by setting temperature of load of the lowest temperature, which is detected during the rotation of a turn table in case of the continuous cooking. CONSTITUTION: A temperature detecting device when a microwave oven performs a continuous cooking includes a temperature detecting unit, a first storing unit, a second storing unit, and a controlling unit. The first storing unit stores the lowest temperature detected from the detecting unit during one cycle of a turn table. The second storing unit stores cooking temperature to be achieved. The controlling unit controls heating until the temperature stored in the first storing unit reaches the cooking temperature stored in the second storing unit at the time of continuous cooking.

Description

Temperature sensing device and its control method during continuous cooking of microwave oven

The present invention relates to a temperature sensing device and a control method thereof for continuous cooking of a microwave oven, and more particularly, when the internal temperature of the continuous cooking is high, the lowest temperature is set as the current temperature of the load on the rotation period of the turntable. The present invention relates to a temperature sensing device and a control method thereof during continuous cooking.

As microwave ovens are used in a wide variety of real-world applications, expectations for their efficiency are increasing. Furthermore, as convenience foods are provided to consumers in various forms, microwaves are used as cooking devices that can be quickly and easily cooked at home and at companies and convenience stores.

The microwave ovens used in a variety of people and used in many places are used continuously when they are used once, and thus the consumer avoids purchasing a product having low continuous use efficiency.

However, the microwave oven using the existing infrared sensor detects the temperature of the load placed in the cooking chamber through the infrared sensor, and terminates the cooking when the detected temperature is higher than the set temperature.

FIG. 1 is a block diagram showing the hardware configuration of a general microwave oven, and FIG. 2 is a detailed block diagram of the determination means shown in FIG. 1 in a conventional microwave oven.

In the microwave oven, a groove 4 is formed at one side of an upper side of the cooking chamber 1, and an infrared sensor 5 is installed to detect the temperature of the load 7 in the cooking chamber 1 through the groove 4 without contact. do. The signal detected from the sensor 5 is input to the judging means 6, and the judging means 6 controls the operation of the heating means 3 and all the loads that generate the microwaves based on this signal.

A turntable driving motor 8 driven under the control of the determination means 6 is mounted below the cooking chamber 1, and a turntable 2 is mounted on the axis of the motor 8 in the center of the cooking chamber 1. It is installed, the load 7 containing the material to be cooked is placed on top of the turntable (2).

That is, according to the above configuration, the determination means 6 drives the heating means 3 and the motor 8 in response to the detection signal of the sensor 5, and the cooking chamber (by the microwaves emitted from the heating means 3). The load 7 in 1) is heated, and the turntable 2 is rotated when a heating operation is made to evenly transmit microwaves to the load 7.

The determination means 6 includes a configuration shown in FIG. 2, which comprises a key input section 6a for inputting a key signal such as setting a temperature desired for cooking by the user and heating it to a desired temperature. A set temperature storage unit 6b for storing the set temperature, a current temperature storage unit 6c for temporarily storing the current temperature detected by the sensor 5, and a simple message such as the set temperature and the present temperature; And a display controller 6e for displaying the liquid crystal, and an output controller 6e for controlling the output by comparing the set temperature with the present temperature.

That is, the determination means 6 judges the present temperature of the load 7 based on the signal detected from the sensor 5, and the heating means 3 until the present temperature becomes the temperature set by the user. ) Is controlled until cooking is completed.

Next, a detailed description will be given of a continuous cooking temperature sensor of a conventional microwave oven having the above configuration with reference to the accompanying drawings.

3 is a flowchart illustrating an operation of a temperature sensing method in a cooking operation of a conventional microwave oven.

That is, when the load 7 is put on the turntable 2 of the cooking chamber 1, the temperature to be cooked is set through the key input unit 6a, stored in the set temperature storage unit 6b, and the cooking start key is selected. The output control unit 6e operates the heating means 3 to heat the load 7.

When the heating operation of the heating means 3 is continued, the temperature of the load 7 is raised, at which time the sensor 5 detects the temperature of the load through the groove 4.

At this time, the temperature of the detected load 7 is compared with the cooking temperature set by the user (step 210), and if the detected present temperature is smaller than the cooking temperature, the heating means 3 is continuously operated to load 7 Is heated, and when the present temperature reaches the cooking temperature, the output control unit 6e ends cooking while stopping the operation of the heating means 3 (step 220).

That is, in the conventional microwave oven, the temperature detection according to the cooking operation compares the present cooking temperature with the set cooking temperature detected by the sensor 5. If the present temperature of the load is lower than the cooking temperature, the heating means 3 is continuously operated to heat the load. However, when the present temperature of the load reached the temperature to cook, the heating means 3 was interrupted and cooking was finished.

This operation is similarly performed during continuous cooking of the microwave oven. For example, even when a user performs cooking once and subsequently wants to perform the next cooking, the determination means 6 of the microwave oven performs cooking when the temperature detected from the sensor 5 becomes higher than the set cooking temperature. Judging by completion.

However, immediately after cooking once in a microwave oven, the temperature in the cooking chamber becomes very high. Therefore, when the temperature detected from the sensor 5 is lower than the load temperature according to the turntable rotation of the microwave oven, the temperature detected by the sensor when the load being rotated away from the sensor, such as the turntable rotation, is detected in the cooking chamber. It will detect high temperatures.

Therefore, when cooking is terminated at the instant when the temperature detected in the continuous cooking state of the conventional microwave oven becomes higher than the set temperature, there is a problem that the cooking is terminated in a state where cooking is not completely performed.

In this case, the microwave oven that is continuously used when the use is made once is deteriorated in efficiency of use, thereby deteriorating the reliability of the use and deteriorating the purchase of the product.

Accordingly, an object of the present invention is to provide a temperature sensing device and a method of controlling the same in continuous cooking for controlling cooking to be performed by setting the lowest temperature detected during rotation of the turntable during continuous cooking of the microwave oven to the load temperature. have.

1 is a block diagram showing a hardware configuration of a general microwave oven.

2 is a detailed configuration diagram of the determination means shown in FIG. 1 in a conventional microwave oven.

3 is a flowchart illustrating a cooking operation according to temperature sensing of a conventional microwave oven.

4 is a detailed configuration diagram of the determination means of the microwave oven according to the present invention.

5 is an operation flowchart for temperature sensing during continuous cooking of a microwave oven according to the present invention.

* Explanation of symbols for main parts of the drawings

1: cooking chamber 2: turntable

3: heating means 4: groove

5 sensor 6 determination means

7: load 8: motor

6a, 6A: Key Input 6b, 6B: Set Temperature Storage

6c, 6C: First current temperature storage unit 6d, 6D: Display unit

6e, 6E: Output control part 6F: Timer

6G: second current temperature storage unit

According to an aspect of the present invention, there is provided a temperature sensing method for continuous cooking of a microwave oven, the method comprising: setting a cooking temperature to be reached; Determining whether the cooking being performed is continuous cooking; Setting the lowest temperature to the temperature of the current load at the temperature detected during one cycle of the turntable during continuous cooking; And determining whether the current load temperature has reached the cooking temperature.

Temperature sensing device for continuous cooking of the microwave oven according to the present invention for achieving the above object comprises a sensing means for sensing the temperature; First storage means for storing the lowest temperature detected from said sensing means for one period of a turntable; Second storage means for storing a cooking temperature to be reached; In continuous cooking, control means for controlling heating until the temperature stored in the first storage means reaches the cooking temperature stored in the second storage means.

According to the present invention, in the continuous cooking of the microwave oven to which the infrared sensor is applied, when the set temperature is lower than the temperature detected by the infrared sensor, the cooking is performed by determining the lower temperature among the temperatures detected during one cycle as the temperature of the load. Therefore, even when the continuous cooking can be cooked up to the set temperature by the sensed temperature, it is possible to improve the convenience of cooking and give reliability of the product.

Hereinafter, with reference to the accompanying drawings will be described in detail the temperature sensing device and its control method during continuous cooking of the microwave oven according to the present invention.

First, the overall hardware configuration of the microwave oven will be described with reference to FIG. 1, and the detailed configuration of the determination means according to the present invention will be described with reference to FIG.

The microwave oven is located at the center of the cooking chamber 1 so that the cup 7 can be placed thereon, the motor 8 for rotating the turntable 2, and the load 7 for heating the load 7. Heating means 3 for generating microwaves. And the microwave oven is a non-contact thermopile temperature for detecting the temperature of the load (7) in the cooking chamber 1 through the groove (4) located on the upper side of the cooking chamber 1 corresponding to the side away from the center of the turntable (2) Sensor 5 and determination means 6 for determining whether to operate the respective parts of the heating means 3 or the like from the output of the detected temperature.

That is, the microwave oven drives the motor 8 to rotate the turntable 2 under the control of the determination means 6, and simultaneously controls the heating means 3 to emit infrared rays into the cooking chamber 1 so that cooking is performed. To be done. And while the cooking is performed, the load control including the heating means 3 determines the continuous driving or termination of the heating means 3 by the temperature detected from the sensor 5.

On the other hand, the judging means 6 includes a key input section 6A for inputting a command to set a user desired temperature and heating to a desired temperature, a set temperature storage section 6B for storing the set temperature, and the sensor And a first present temperature storage section 6C for storing the present temperature detected from (5). The judging means 6 includes a display unit 6D for displaying the set temperature and the present temperature or time, an output control unit 6E for controlling the output by comparing the set temperature and the present temperature, and counting the cooking time. And a second current temperature storage section 6G which estimates and stores the lowest temperature among the temperatures detected during one rotation period of the turntable 2 as the current temperature of the load.

That is, the determination means 6 does not unconditionally set the temperature detected from the sensor 5 stored in the first present temperature storage 6C as the present temperature of the load 7 when the continuous cooking is performed. Therefore, in the continuous cooking, the determination means 6 estimates the lowest temperature among the temperatures detected during one rotation period of the turntable 2 as the current temperature of the load 7 and stores it in the second current temperature storage unit 6G. do. In this way, the temperature of the load 7 stored in the second current temperature storage unit 6G is controlled to be cooked up to the set temperature by comparing with the cooking temperature stored in the set temperature storage unit 6B.

Next, a description will be given of the temperature sensing method during continuous cooking of the microwave oven according to the present invention having the above configuration.

5 is an operation flowchart for temperature sensing during continuous cooking of a microwave oven according to the present invention.

The user puts a load (7) to cook on the turntable (2) of Josiri (1), and sets the cooking temperature (Tt) to be cooked by the key input unit (6A) to the set temperature storage unit (6B). Save it. Although the setting of the cooking temperature Tt may be performed by the user, the cooking temperature already set and stored in the set temperature storage unit 6B may be read by the output control unit 6E because the user selects the automatic mode of cooking. It may be. In any case, the output control unit 6E recognizes the cooking temperature Tt to be reached by the current cooking.

In the state where the cooking temperature Tt to be reached is recognized as described above, the heating operation of the heating means 3 is performed under the control of the output control unit 6E. In the heating operation of the heating means 3, when the user selects a cooking start key in the key input section 6A, the output control section 6E that inputs this signal operates the turntable driving motor 8 and the heating means 3. To control.

In this way, immediately after the heating operation of the heating means 3 is started under the control of the output control unit 6E, the sensor 5 detects the temperature in the cooking chamber 1. At this time, the temperature Ta in the cooking chamber detected by the sensor 5 is once stored in the current temperature storage unit 6C.

Then, the output control unit 6E detects the set temperature Tt stored in the set temperature storage unit 6B and the temperature in the cooking chamber 1 detected by the sensor 5 at the beginning of heating and stored in the current temperature store 6C. (Ta) is compared (step 101).

In general, in a microwave oven, when the cooking is not continuous, the temperature Ta in the cooking chamber 1 detected at the beginning of heating is lower than the cooking temperature Tt. Accordingly, when the detection temperature Ta is lower than the set temperature Tt in step 101, the output control unit 6E determines that the detection temperature Ta is not continuous cooking.

Thereafter, the output controller 6E sets the temperature detected from the sensor 5 stored in the current temperature storage 6C to the load temperature Tr, and sets the load temperature Vr to the set temperature storage 6B. The set temperature stored in the operation is continuously compared (step 103). The output controller 6E continues to heat the heating means 3 until the load temperature Tr in the cooking chamber 1 detected by the sensor 5 reaches the set cooking temperature Tt, and at the same time, the turntable Rotate (2).

That is, while the heating means 3 is heated to satisfy the condition of step 103, the temperature of the load 7 in the cooking chamber 1 is increased, and the load 7 is placed by the driving of the motor 8. The turntable 2 continues to rotate. The rotation of the turntable 2 prevents only the specific direction of the load 7 from being heated and crack-heats the entire area of the load 7 since the infrared rays emitted to the cooking chamber 1 are emitted from a specific direction. For sake.

When the temperature Tr of the load detected from the sensor 5 stored in the current temperature storage unit 6C reaches the set cooking temperature Tt stored in the set temperature storage unit 6B, the output control unit 6E Completes the cooking (step 105).

Next, immediately after the user puts the load 7 into the cooking chamber 1, when the cooking is started by inputting the cooking start key, the temperature Ta in the cooking chamber 1 detected by the sensor 5 is determined by the user. The case where the cooking temperature Tt is smaller than the value obtained by subtracting the margin ratio a occurs.

That is, when the temperature Ta in the cooking chamber 1 detected by the sensor 5 in step 101 is greater than a value obtained by subtracting the margin value a from the cooking temperature Tt stored in the set temperature storage unit 6B. The output control unit 6E determines that it is continuous cooking. At this time, the microwave oven is continuously cooked, and the temperature in the cooking chamber 1 is increased. Therefore, immediately after the cooking start key is input from the key input unit 6A, the temperature in the cooking chamber 1 detected by the sensor 5 is detected as a very high value.

At this time, the output controller 6E determines whether the current position TIMEc of the turntable 2 has completely rotated one cycle TT of the turntable (step 107). This is because when continuous cooking is performed, the temperature detected from the sensor 5 varies greatly depending on the position of the load 7 and the distance of the sensor 5.

In more detail, when the sensor 5 directly detects the temperature of the load 7, the detection temperature is low, but the position of the load 7 placed on the rotating turntable 2 is moved from the sensor 5. When away, the sensor 5 detects the temperature inside the cooking chamber 1 that has already been raised. Therefore, in order to prevent an error of judging the internal temperature of the cooking chamber 1 increased due to continuous cooking as the temperature of the load 7, it is determined whether one cycle of the turntable 2 is completely rotated.

Thus, when the current position TIMEc of the turntable 2 rotated under the control of the output control unit 6E in step 107 does not completely rotate one cycle of the turntable 2, the output control unit 6E performs the sensor ( Step 5 compares whether the current temperature Tc detected from 5) and stored in the current temperature storage unit 6C is the lowest value Tmin at the temperature detected during the current cooking.

When the present temperature Tc detected in the 113th step is smaller than the minimum temperature Tmin detected from the sensor 5 during the current cooking, the detected present temperature Tc is set to the lowest temperature Tmin and estimated. The current temperature storage unit 6G (step 115).

That is, steps 113 and 115 are repeated until the current position TIMEc of the turntable 2 reaches the rotation period TT of the turntable 2. In this way, the operation of setting the lowest temperature Tmin among the temperatures Tc detected by the sensor 5 during one cycle of the turntable 2 as the load temperature and storing it in the estimated current temperature storage unit 6G is performed. It is performed repeatedly.

After the current position TMIEc of the turntable 2 reaches the rotation period TT of the turntable 2 in step 107, the temperature Tmin stored in the estimated current temperature storage unit 6G is stored. Compared with the cooking temperature Tt stored in the set temperature storage unit 6B (step 109).

If the lowest temperature Tmin detected during one cycle of the turntable 2 in step 109 does not reach the set cooking temperature Tt, the output controller 6E continues to heat the heating means 3 while The comparison of the temperatures detected from the sensor 5 is repeated.

Therefore, when the turntable 2 is continuously rotated because the lowest temperature Tmin detected during one cycle of the turntable 2 does not reach the set cooking temperature Tt, the current position of the turntable 2 is again Comparing in step 107 whether TIMEc) has completely rotated one turn cycle of turntable 2, until the current position TIMEc of turntable 2 completely rotates one turn cycle of turntable 2, Subsequently, the lowest temperature Tmin is substituted for and stored at the detected temperature (steps 113 and 115).

When the one rotation cycle of the turntable 2 is completely rotated, it is compared whether or not the lowest temperature Tmin detected during one cycle of the turntable 2 in step 109 reaches the set cooking temperature Tt. When the lowest temperature Tmin detected for one period reaches the cooking temperature Tt, the output control unit 6E determines that cooking has been completed (step 111).

That is, the temperature sensing device and the control method for the continuous cooking of the microwave oven according to the present invention, when performing a continuous cooking in the microwave using an infrared sensor, the load is put in the cooking chamber (1), the key input unit (6A) Set the temperature (Tt) to cook through, and start cooking. Then, the judging means 6 compares the cooking chamber internal temperature Ta with the set cooking temperature Tt minus the margin ratio a, and the margin ratio a at the temperature Tt to which the cooking chamber internal temperature Ta should reach. Is less than the subtracted value, it is determined that the lowest temperature among the temperatures detected by the sensor 5 during one cycle of the turntable 2 is determined as the temperature of the load 7 to control the temperature Tt to be cooked. To do.

As described above, in the continuous cooking of the microwave oven using the infrared sensor, when the set temperature is lower than the temperature detected by the infrared sensor, the lower temperature among the temperatures detected during one cycle of the turntable is determined as the load temperature. By cooking, it is possible to cook up to a set temperature even in continuous cooking, thereby improving the convenience of cooking and bringing the reliability of the product.

Claims (3)

Setting a cooking temperature to be reached; Determining whether the cooking being performed is continuous cooking; Setting the lowest temperature to the temperature of the current load at the temperature detected during one cycle of the turntable during continuous cooking; And determining whether the current load temperature has reached the cooking temperature. The method of claim 1, wherein the determining of the continuous cooking comprises comparing whether the temperature detected immediately after the start of cooking is smaller than the cooking temperature. Sensing means for sensing a temperature; First storage means for storing the lowest temperature detected from said sensing means for one period of a turntable; Second storage means for storing a cooking temperature to be reached; And control means for controlling heating until the temperature stored in the first storage means reaches the cooking temperature stored in the second storage means during continuous cooking.

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