KR200143509Y1 - Microwave oven - Google Patents

Abstract

The present invention relates to a microwave oven, comprising: control means, a key input means for inputting a cooking time, a cooking temperature, and an operation start command to the control means, a high frequency generating means for generating a high frequency signal by receiving an operation signal from the control means; And a temperature detecting means for detecting the temperature of the food in the cooking chamber and a position moving means for receiving a drive signal from the control means and moving the position of the temperature detecting means so that the temperature detecting means is moved up and down by the control of the control means. It is very effective to simplify cooking and reduce cooking costs.

Description

microwave

1 is a control block diagram of a microwave oven according to an embodiment of the present disclosure.

2 is a front view of the microwave oven according to one embodiment of the report.

3 is an enlarged view of the main part of FIG.

4 is a flowchart of a method for controlling a microwave oven according to an embodiment of the present disclosure.

5 is a perspective view of a microwave oven according to the prior art.

* Explanation of symbols for main parts of the drawings

100: control means 200: key input means

210: display unit 300: high frequency generating means

500: cooking chamber 510: food

600: temperature detection means 700: position moving means

710: first driving circuit 720: first motor

730: leaf spring 740: support

The present invention relates to a microwave oven, and more particularly, to a microwave oven capable of controlling cooking by a control means by detecting a cooking state of food by a temperature detecting means.

The microwave oven according to the related art detects the temperature of the cooking chamber 500 for cooking the temperature of the food 510 and the cooking 510 cooked in the cooking chamber 500, as shown in FIG. It consisted of a rod (900).

The detection rod 900 is usually disposed outside the cooking chamber 500 and installed in the cooking chamber 500 when the user wants to detect the temperature of the food 510.

A door 560 is installed at the front of the cooking chamber 500, and a fixing member 562 is integrally formed with the door 560 at one side of the door 560, and the door 560 is provided at the main body 1000. The fixing member 562 of the) is formed with a fixing groove 1002 is elastically inserted.

The microwave oven according to the related art configured as described above, the user places the food 510 on the turntable 560 of the cooking chamber 500, closes the door 560, and operates the cooking time and the key input means 200. When the start command is input, the cooking time signal and the operation command signal are output from the key input means 200 to the control means, and the high frequency is generated from the high frequency generating means 300 under the control of the control means, and the food is cooked.

When the cooking time set in the key input means 200 elapses, a cooking time elapsed display indicating that the cooking time has elapsed from the key input means 200 is displayed, and the cooking time has elapsed from the key input means 200. An alarm will sound.

Next, the user opens the door 560, inserts the detection rod 900 placed on the outside of the cooking chamber 500 into the cooking chamber 500, inserts the detection rod 900 into the food 510, and inserts an end thereof. Coupling with the connection terminal 570 installed on one side wall of the cooking chamber 500.

Then, the temperature signal of the food 510 is output from the detection rod 900 to the control means, and a display signal is output from the control means to the display portion 210 of the key input means 200. The temperature of the food is displayed.

Then, the user determines whether to continue cooking or to finish cooking by looking at the temperature of the food displayed on the display unit 210.

When the user determines to end cooking, the user opens the door 560 and pulls out the food 510 from the cooking chamber 500.

On the other hand, when the user determines to continue cooking, the user opens the door 560 to separate the detection rod 900 from the cooking terminal 510 and the connection terminal 570 of the cooking chamber 500. Then, the detection rod 900 is pulled out of the cooking chamber 500, the door 560 is closed, and the cooking time is input to the key input means 200 to add cooking as desired.

However, the microwave oven according to the related art has to open the door 560 in order to detect the temperature of the food 510 after the cooking period has passed, so that the heat in the cooking chamber 500 leaks to the outside and loses heat. This occurred, there was a problem that the cooking cost increases.

In addition, when the user wants to continue cooking, there is a problem that cooking is cumbersome because the user needs to separate the detection rod 900 from the food 510.

In addition, when the temperature of the food 510 exceeds the temperature desired by the user within the cooking time set by the user, the food 510 is excessively cooked.

Therefore, the purpose of the present invention is to solve the above problems, and an object of the present invention is to detect the cooking state of food by the temperature detecting means and to control the cooking time by the control means, and the temperature detecting means is controlled by the control means. It is possible to move up and down by means of providing a microwave oven that can simplify cooking and reduce cooking costs.

In order to achieve the above object, a microwave oven according to the present invention includes a control means, a key input means for inputting a cooking time, a cooking temperature, and an operation start command to the control means, and a high frequency for receiving an operation signal from the control means to generate a high frequency. And a generating means, a temperature detecting means for detecting a temperature of the food in the cooking chamber, and a position moving means for receiving a driving signal from the control means and moving the position of the temperature detecting means.

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

As shown in FIG. 1, the control means 100 is a microcomputer for controlling the overall cooking operation of the microwave oven.

The key input means 200 is connected to the input terminal I1 of the control means 100 so as to input a cooking time, a cooking temperature and an operation start command to the control means 100.

The high frequency generating means 300 is connected to the output terminal O1 of the control means 100 via the relay 400 so as to receive an operation signal from the control means 100 and generate a high frequency.

The relay 400 receives the operation signal from the control means 100 and generates a magnetic force to the relay coil L1 and the magnetic force generated from the relay coil L1 to the high frequency generating means 300. It consists of the switch SW1 which connects an AC power supply.

The temperature detecting means 600 for detecting the temperature of the food 510 in the cooking chamber 500 is composed of a thermistor whose resistance is changed according to the temperature of the food 510.

A display unit 210 which receives a display signal relating to a cooking state and an operation command from the control means 100 and displays a cooking state and an operation command is connected to an output terminal O4 of the control means 100.

A second drive circuit 580 that receives the drive signal from the control means 100 and outputs a DC drive voltage is connected to the output terminal O5 of the control means 100, and the second drive circuit 580 ) Is connected to a second motor 550 that rotates the turntable 540 by receiving a DC voltage of 12V from the second driving circuit 580.

The position shifting means 700 which receives the driving signal from the control means 100 and moves the position of the temperature detecting means receives the driving signal from the control means 100 as shown in FIGS. 1 to 3. And a first driving circuit 710 for receiving and outputting a driving voltage, a first motor 720 that receives and rotates a driving voltage from the first driving circuit 710, and is coupled to a rotation shaft of the first motor 720. The leaf spring 730 is released when the first motor 720 rotates to one side and wound when the first motor 720 rotates to the other side, and the leaf spring 730 is coupled to the leaf spring 730. The support 740 for supporting the temperature detecting means 600 to lower the temperature detecting means 600 when the 730 is released and to raise the temperature detecting means 600 when the leaf spring 730 is wound. )

The support part 740 has a plurality of support members 742, 744, 746, and 748 connected to each other in an upward direction. In the present embodiment, four support members 742, 744, 746, and 748 are connected to each other, and each support member 742, 744, 746, and 748 is provided at the lower and upper sides of the support members 742, 744, 746, and 748. The locking jaw 751 and the locking portion 752 are formed to prevent the separation.

The top plate 520 of the microwave oven is provided with a guide member 530 for guiding the movement of the leaf spring 730. An end of the guide member 530 is formed with a guide groove 532 for guiding the movement of the leaf spring 730.

The inner leaf spring 730 is fixed to the rotating shaft of the first motor 720, the inner end of the spiral wound around the rotating shaft, the outer end of the leaf spring 70 is the outermost portion of the support portion 740 It is fixed to the supporting member 748 at the end.

The temperature detecting means 600 is installed inside the support member 748 at the end of the support 740.

Meanwhile, a second motor 550 for rotating the turntable 540 is installed at the bottom of the main body 1000. The second motor 550 is in contact with the turntable 540 via the rotation shaft 552.

Four portions of the bottom surface of the turntable 540 are attached with rollers 542 for supporting the turntable 540 and smoothly rotating the turntable.

In addition, a four-legged seat on the bottom of the main body 1000 is provided with a rubber leg 1004 for elastically supporting the main body 1000 from the floor surface of the room.

The key input means 200 is provided on the surface of the main body 1000 on one side of the cooking chamber 500, and the display unit 210 is provided above the key input means 200.

Hereinafter will be described the operation and effect of the microwave oven according to an embodiment of the present invention.

First, as an initial condition for the operation, it is assumed that the leaf spring 730 is wound around the rotation shaft 720 so that the support part 740 is overlapped upward.

First, in step S1, the food 510 is placed on the turntable 540 of the cooking chamber 500.

Then insert the power cord (not shown) into the outlet.

The AC power supply 800 is then connected to the switch SW1 of the relay 400.

Next, the user inputs a desired cooking time and cooking temperature into the key input means 200.

Next, the cooking time and the cooking temperature are output from the key input means 200 to the input terminal I1 of the control means 100. Then, a display signal is output from the control means 100 to the display unit 210 to display the cooking time and the cooking temperature on the display unit 210.

Next, when the user inputs an operation start command to the key input means 200 in step S2, an operation start command is output from the key input means 200 to the input terminal I1 of the control means 100. Next, a display signal is output from the output terminal O4 of the control means 100 to the display unit 210 and at the same time, the relay coil L1 of the relay 400 from the output terminal O1 of the control means 100. The operation signal is output to the second driving circuit 580 from the output terminal O5 of the control means 100 at the same time.

Then, the display unit 210 indicates that food is to be cooked, and magnetic force is generated from the relay coil L1 so that the switch SW1 is turned on. Then, an AC voltage of 220V is applied from the AC power supply 800 to the high frequency generating means 300. Then, the high frequency is output from the high frequency generating means 300 to the food 510 of the cooking chamber 500 through a waveguide, not shown, so that the food 510 is heated.

At the same time, a driving voltage of DC 12V is output from the second driving circuit 580 to the second motor 550 so that the second motor 550 is rotated so that the turntable 540 rotates. Then, the food 510 mounted on the turntable 540 is rotated so that the high frequency is uniformly incident on the food 510.

In step S3, the control means 100 determines whether the cooking execution time has reached the cooking time previously input to the control means 100.

If it is determined that the cooking execution time has reached the cooking time previously input to the control means 100 (YES), the relay 400 is output from the output terminal O1 of the control means 100 in step S4. A low level operation stop signal is output to the relay coil L1 of the control unit 100 and at the same time a low level drive stop signal is output from the output terminal O5 of the control means 100 to the second drive circuit 580. The display signal is output from the output terminal O4 of the control means 100 to the display unit 210.

Then, since the relay 400 does not operate and the AC voltage is not supplied to the high frequency generating means 300, high frequency is not generated from the high frequency generating means 300. Therefore, the food is not cooked.

In addition, since the driving voltage of DC 12V is not output from the second driving circuit 580 to the second motor 550, the second motor 550 is not rotated to stop the turntable 540. Then, the food 510 placed on the turntable 540 stops.

At the same time, the display unit 210 indicates that the cooking execution time has reached the cooking time.

Next, the high level and low level signals are output from the output terminal O2 and the output terminal O3 of the control means 100, respectively.

Then, a DC voltage is applied from the first driving circuit 710 in the direction of the + terminal of the first motor 720 and the-terminal of the first motor 720 so that the first motor 720 is shown in FIG. 2. Rotate counterclockwise at.

Then the outer end of the leaf spring 730 is lowered downward. As the outer end of the leaf spring 730 descends downward, the support member 748 fixed to the outer end of the leaf spring 730 is lowered so that the support member 748 is turned on the turntable 540. It is inserted into the food 510 that was above.

Next, in step S5, the temperature of the assembly 510 is detected by the temperature detecting means 660 provided inside the support member 748, and the control means 100 is released from the temperature detecting means 600. A temperature signal is output to the input terminal I2 of

Then, the control means 100 determines whether the temperature of the food 510 is equal to or higher than the cooking temperature previously input to the control means 100.

If it is determined that the temperature of the food 510 is higher than the cooking temperature as a result of the determination (in the case of YES), a display signal is output from the control means 100 to the display unit 210 in step S6 to display the display unit. At 210, the temperature of the food 510 is greater than the cooking temperature and indicates that the food 510 is cooked.

Next, a low level signal is output from the output terminal O2 of the control means 100 and a high level signal is output from the output terminal O3 of the control means 100.

Then, a DC voltage is output from the first driving circuit 710 to the negative terminal and the positive terminal of the first motor 720 so that the first motor 720 rotates clockwise when viewed in FIG. 2.

Then, the leaf spring 730 is wound so that the outer end of the leaf spring 730 is pulled upward.

Then, the temperature detecting means 600 and the support member 748 inserted into the food 510 are separated from the food 510, and the support members 742, 744, 746, and 748 overlap each other. The support member 748 and the temperature detecting means 600 move upward.

When the support member 748 and the temperature detecting means 600 are close to the top plate 520, a low level signal is output from the output terminal O2 of the control means 100, and the control means 100 A low level signal is output from the output terminal O3 of the first terminal circuit 710 so that a DC voltage is not applied from the first driving circuit 710 to the first motor 720.

Then, the rotation of the first motor 720 is stopped and the rising of the support member 748 and the temperature detecting means 600 is stopped to cook food.

On the other hand, when it is determined in step S5 that the temperature of the food 510 is less than the cooking temperature as a result of the determination in the control means 100 (NO), the display unit from the control means 100 in step S7. A display signal is output to the display 210 to indicate that the temperature of the food 510 is lower than the cooking temperature and cooking continues.

Next, the control means 100 calculates a cooking time based on the difference between the temperature of the food 510 and the cooking temperature.

Next, in step S8, the temperature detecting means 600 is raised through the same process as in step S6.

Next, the process proceeds to the step S2 and cooking is performed for the cooking time calculated in the step S7.

Next, the above-described process of step S3 or less is repeated to cook until the temperature of the food 510 reaches the cooking temperature.

On the other hand, when it is determined in step S3 that the cooking execution time is less than the cooking time, the flow advances to step S2 to continue cooking.

In the above-described embodiment, the first motor 720 is a DC motor, but a single-phase induction motor, a single-phase synchronous motor or a universal motor such as a universal motor is used, and the first driving circuit 710 is the first motor. Switching means and a transformer may be configured to supply an AC voltage to the motor 720.

As described above, according to the microwave oven according to the present invention, since the temperature detecting means is moved up and down by the control of the control means, the cooking can be simplified and the cooking cost can be reduced.

Claims (4)

In the microwave oven, the control means 100, a key input means 200 for inputting a cooking time, a cooking temperature and an operation start command to the control means 100, and receives an operation signal from the control means 100. A high frequency generating means 300 for generating a high frequency, a temperature detecting means 600 for detecting a temperature of the food 510 in the cooking chamber 500, and the temperature detecting means receiving a driving signal from the control means 100; Microwave oven characterized in that consisting of a position moving means 700 for moving the position of 600. The microwave oven according to claim 1, wherein the temperature detecting means (600) is a thermistor whose resistance is changed according to the temperature of the food (510). The driving apparatus of claim 1, wherein the position shifting means 700 receives a driving signal from the control means 100 and outputs a driving voltage, and receives the driving voltage from the driving circuit 710. When the first motor 720 is coupled to the rotating shaft of the first motor 720 and the first motor 720 is released when the first motor 720 rotates to one side, and the first motor 720 rotates to the other side. When the leaf spring 730 is wound and coupled to the leaf spring 730 and the leaf spring 730 is released, the temperature detecting means 600 is lowered and the leaf spring 730 is wound. Microwave oven characterized in that consisting of a support portion 740 for supporting the temperature detecting means 600 to raise the detection means (600). According to claim 1, wherein the control means 100 is connected to the display unit 210 for receiving a display signal of the cooking state of the food from the control means 100 and the user's operation command to display the cooking state and the operation command Microwave oven characterized in that.