KR19990038637A - Microwave ovens with variable openings - Google Patents

Abstract

The disclosed microwave oven relates to a microwave oven, in which an opening in which food is cooked under an optimal state is adjusted by varying an opening size of one side of a cooking chamber to adjust an amount of microwave emission. The present invention is a microwave oven for cooking food inside the cooking chamber by microwaves generated from the magnetron and emitted through the opening of the side wall of the cooking chamber, the opening and closing plate opening and closing the operation piece on one side; A guide member formed at both sides of the opening to guide the opening and closing plate, and having a long hole through which the operating piece penetrates; A motor generating a rotational force through the motor shaft; And a worm gear which is formed to correspond to the operating piece in the vicinity of the long hole of the guide member, and one side is fixed to the rotating shaft and the other side is rotatably fixed to the bracket, such that the operating piece is moved along the worm gear by the rotation of the motor.

Description

Microwave ovens with variable openings

The present invention relates to a microwave oven, and more particularly, to a microwave oven in which an opening is varied so as to control the amount of microwave emission by varying an opening size of one side of the cooking chamber.

In general, a microwave oven is a heating apparatus for cooking food using microwaves, and as shown in FIG. 1, the cabinet 1, which is divided into left and right spaces to form an appearance of the microwave oven, has a front side open at one side. (2) is provided, the door 3 is hinged fixed to one side to open and close the front open portion in the state that the cooking chamber (2) is formed, and the rotary dish 6 is placed on the bottom surface ) Is rotatably installed on the bottom surface of the cooking chamber 2.

The rotary plate 6 is provided with a rotary plate driving unit 33 (shown in FIG. 2) composed of a motor and various gears not shown on the bottom thereof, and is configured to rotate the rotary plate 6 when cooking.

In addition, an apparatus chamber (not shown) in which various circuit devices are installed is provided at the other side of the cooking chamber, and the apparatus chamber includes loads such as a magnetron for generating microwaves, a high voltage transformer, a high pressure capacitor, and a cooling fan for cooling the magnetron. Are electrically connected to each other, and the front panel is provided with an operation panel 4 for operating these devices and displaying their status.

In addition, an opening 5 for emitting the microwaves into the cooking chamber 2 is formed on the side wall of the cooking chamber 2, and the size thereof is formed to have a fixed size through a predetermined test in the manufacturing process.

Meanwhile, as shown in FIG. 2, the control circuit of the conventional microwave oven includes the start switch 11, the menu selection switch 12, the temperature setting switch 13, and the time setting switches 14 of the microwave oven. The switch input unit 10 is provided, and the switch input unit 10 is formed in the operation panel 4 shown in FIG.

In addition, the control unit 20 is provided to control the driving of the various loads for the cooking operation in accordance with the switch operation of each of the switch input unit (10). Here, the control unit 20 controls the cooking operation using the microcomputer 21, but utilizes predetermined information previously stored from the data storage unit 22, for example, cooking temperature, cooking time, and the like. The data storage unit 22 is preferably configured as a ROM (Read Only Memory) that does not erase the information even when the power supply is stopped.

In addition, a load driving means 30 which is driven by the controller 20 to perform a cooking operation is provided. The load driving means 30 includes a magnetron driving unit 31 for driving the magnetron to generate microwaves, an illumination and fan driving unit 32 for driving the lighting and cooling fans of the cooking chamber, and a rotating plate for rotating the rotary plate 6. The drive part 33 is comprised. Here, the magnetron driver 31 generates a microwave of 2450 MHz through a circuit element such as a high voltage transformer, a high voltage diode, a high voltage capacitor, and a magnetron and emits the microwave into the cooking chamber 2. In addition, the high heat generated in the magnetron is forcedly cooled by the cooling fan.

In addition, the display unit 40 displaying the cooking state as described above is preferably formed in the operation panel 4 shown in FIG. 1 together with the switch input unit 10 described above.

In the conventional microwave oven, as the door 3 is opened from the cabinet 1, a cooking container containing food enters into the cooking chamber 2 through the front of the cabinet 1, and the cooking container is rotated. The dish 6 is placed on top.

Thereafter, the microwave oven is operated according to the operation of the switch input unit 10 while the door 3 is closed. That is, the user sets the desired cooking temperature and time using the temperature setting switch 13 and the time setting switch 14, and starts cooking with the start switch 11.

Here, the microcomputer 21 of the control unit 20 detects the on / off of each of the switches 11, 13, 14 described above, and accordingly the magnetron driver 31, the lighting and fan driver 32, And operating the rotary plate driving unit 33 to heat and cook food in the cooking chamber 2.

That is, the commercial AC power input from the outside is supplied to a load such as a high voltage capacitor, a high voltage diode and a magnetron through a high voltage transformer, and thus microwaves are generated from the magnetron and emitted into the cooking chamber 2 to cook food. . In addition, the microcomputer 21 drives a cooling fan for turning on the illumination of the cooking chamber and cooling the magnetron, and rotating the rotating dish 6 in which food is placed to improve cooking efficiency.

On the other hand, by operating the menu selection switch 12, the user selects a desired menu, and the cooking temperature and time according to this menu are automatically set / controlled to perform the cooking operation. Here, the microcomputer 21 reads information such as temperature and time corresponding to the input of the menu selection switch 12 from the data storage unit 22 to control the cooking operation and accordingly performs a predetermined cooking process. The display unit 40 displays the cooking setting and the progress state, and informs the user.

However, in cooking the food through the microwave in this way, it is preferable to boil in an optimal state in consideration of various conditions such as the kind, volume and weight of the food, the conventional microwave oven as described above There was a problem in that food can not be cooked in an optimal state according to various conditions by simply adjusting only the cooking time under a fixed emission amount.

The present invention has been made to solve the conventional problems as described above, the object is to change the size of the opening of one side of the cooking chamber to adjust the amount of microwave emission electrons that the food is cooked under the optimum state is variable To provide a stove.

1 is a perspective view showing the appearance of a conventional microwave oven,

2 is a block diagram showing a conventional microwave control circuit;

3 is a circuit diagram showing a preferred embodiment of the microwave oven is variable opening according to the present invention,

4 is a perspective view illustrating main parts of the opening and closing unit of FIG. 3.

Explanation of symbols on the main parts of the drawings

2: cooking chamber 5: opening

10: switch input unit 20: control unit

30: load driving means 40: display unit

50: motor drive unit 51: motor

52: motor shaft 53: worm gear

54: bracket 55: opening and closing plate

56: operating piece 57: guide member

58: longevity

A microwave oven having a variable opening according to the present invention for realizing this is characterized in that, in a microwave oven for cooking food inside the cooking chamber by microwaves generated from the magnetron and emitted through the opening of the side wall of the cooking chamber, Opening and closing means for opening and closing to adjust its size; And it has a conveying means for conveying the opening and closing means to adjust the emission amount of the microwave flowing into the cooking chamber.

Here, the opening and closing means and the transfer means opening and closing the opening and closing plate having an operating piece on one side; Guide members formed on both sides of the opening to guide the opening and closing plate, the guide member having a long hole through one side thereof; A motor generating a rotational force through the motor shaft; And a worm gear which is formed to correspond to the operating piece in the vicinity of the long hole of the guide member, and one side is fixed to the rotating shaft and the other side is rotatably fixed to the bracket, and the operating piece is rotated along the worm gear by the rotation of the motor. It is desirable to allow movement.

In addition, another feature of the present invention is a switch input unit which is manipulated by the user to set the cooking temperature and time, etc. and input an operation start command; A control unit which outputs various driving and control signals according to a cooking operation by an input of the switch input unit; Load driving means for driving loads necessary for a cooking operation by a drive signal output from the controller; A display unit for displaying predetermined data according to a setting state of the switch input unit and cooking operation of the load driving means by a control signal of the controller; And a motor driving unit which drives the motor to adjust the size of the opening according to the control signal of the controller.

Hereinafter, a preferred embodiment of a microwave oven having a variable opening 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 circuit diagram showing a preferred embodiment of the microwave oven is variable opening according to the present invention, Figure 4 is a perspective view of the main part showing the opening and closing means of FIG.

As shown, the switch input unit 10 provided with the start switch 11, the menu selection switch 12, the temperature setting switch 13, and the time setting switches 14 is operated by a user, and the cooking temperature and time are provided. Etc. and setting an operation start command, the switch input unit 10 being formed in the operation panel 4 shown in FIG.

The control unit 20 including the microcomputer 21 and the data storage unit 22 receives an operation command of the switch input unit 10 and load-loading means to be described later according to information previously stored in the data storage unit 22 ( 30) to control the heating / cooking operation. Here, the data storage unit 22 is configured as a ROM that does not erase the information even when the power supply is interrupted as described above.

The load driving means 30 performs the heating / cooking operation of the microwave oven, the magnetron driving unit 31 for driving the magnetron (MGT), the lighting and fan driving unit 32 for driving the lighting and the cooling fan of the cooking chamber, and a rotating plate. And a rotary plate driving unit 33 for rotating (6). In addition, a display unit 34 for displaying predetermined data according to the cooking state of the load driving means 30 and the setting state of the switch input unit 10 by the control signal of the control unit 20 is provided.

Here, the display unit 34 is formed on the operation panel 4 together with the switch input unit 10, and the magnetron driving unit 31 is a high voltage transformer, a high voltage diode, a high voltage capacitor and a magnetron (MGT). Microwaves are generated through the circuit elements and emitted into the cooking chamber 52. At this time, the high heat generated in the magnetron (MGT) is forcibly cooled by the cooling fan.

In addition, in order to cook food in the cooking chamber 2, the microwave is emitted through the opening 5 of the side wall of the cooking chamber 2, and the opening and closing means open and close the opening 5 to adjust the size thereof. By controlling the emission amount of the microwave flowing into the cooking chamber (2).

To this end, the opening and closing means for opening and closing the opening 5 and the opening and closing plate 55 having an operating piece 56 on one side, and formed on both sides of the opening 5 to guide the opening and closing plate 55 It consists of a guide member 57 formed with a long hole 58 through which the working piece 56 penetrates.

In addition, the conveying means is formed so as to correspond to the operating piece 56 in the vicinity of the long hole 58 of the motor 51 and the guide member 57 to generate a rotational force through the motor shaft 52, one side of the rotating shaft The worm gear 53 is fixed to the 52 and the other side is rotatably fixed to the bracket (54).

Therefore, the operating piece 56 is moved along the worm gear 53 by the rotation of the motor 51 to open and close the opening and closing plate 55 covering the opening 5 so that its size can be adjusted. Done.

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

First, as the door 3 is opened from the cabinet 1, a cooking container containing food enters into the cooking chamber 2 through the front of the cabinet 1, and the cooking container is at the top of the rotary dish 6. After being placed in, the microwave oven is operated according to the operation of the switch input unit 10 in the state in which the door 3 is closed. At this time, the user sets the desired cooking temperature and time using the temperature setting switch 13 and the time setting switch 14, and starts the cooking by turning on the start switch 11.

Here, the signal of the switch input unit 10 is applied to the control unit 20 to control the load driving means 30, the magnetron driving unit 31, the lighting and fan driving unit (controlled by the control unit 20) 32), the operation of heating and cooking food inside the cooking chamber 2 by operating the rotary plate driving unit 33 is the same as the conventional microwave oven described in detail with reference to FIGS. 1 to 2, and thus a detailed description thereof will be omitted.

In addition, the microcomputer 21 of the controller 20 determines the size of the opening and closing of the opening 5 only by considering various conditions such as the type, volume, and weight of the food. Here, the size of the opening 5 is proportional to the amount of microwave emission, so that the larger the opening 5 is, the more the microwave is emitted into the cooking chamber 2.

Therefore, a low signal is output from the microcomputer 21 to the motor drive unit 50 in order to open the opening 5 to a predetermined size suitable for the food cooking conditions, so that the power supply voltage Vcc is applied to the relay RY. The relay is turned on so that AC power is applied to and driven by the motor 51.

The opening and closing plate 55 covering the opening 5 is moved by the driving of the motor 51, which will be described in more detail. First, rotational force is generated from the motor 51 and through the motor shaft 52. Rotate the worm gear 53.

At this time, the worm gear 53 is rotated in one direction as one side is fixed to the rotation shaft 52 and the other side is rotatably fixed to the bracket (54). Therefore, the opening and closing plate 55 is moved upward or downward by the operating piece 56 corresponding to the worm gear 53, where the opening and closing plate 55 is guided by guide members 57 on both sides thereof. The working piece 56 is movable between them via the long hole 58.

Therefore, the operation piece 56 is moved along the worm gear 53 by the rotation of the motor 51 to open and close the opening and closing plate 55 covering the opening 5 so that the size thereof is adjustable. Through this, the microwave emission amount of the cooking chamber 2 is controlled.

As described above, according to the microwave oven, in which the opening is variable, the cooking time is adjusted, and the size of the opening of one side of the cooking chamber is adjusted to control the amount of microwave emission, thereby making it possible to cook food under an optimal condition. .

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 modifications are intended to fall within the scope of the appended claims.

Claims (3)

In the microwave oven for cooking food in the cooking chamber by microwaves generated from the magnetron and emitted through the opening of the side wall of the cooking chamber, Opening and closing means for opening and closing the opening to adjust its size; And The microwave oven is provided with a opening means for transferring the opening and closing means to adjust the amount of microwaves flowing into the cooking chamber. According to claim 1, wherein the opening and closing means and the transfer means An opening and closing plate for opening and closing the opening and having an operation piece at one side; Guide members formed on both sides of the opening to guide the opening and closing plate, the guide member having a long hole through one side thereof; A motor generating a rotational force through the motor shaft; And It is formed in the vicinity of the long hole of the guide member to correspond to the operating piece, one side is fixed to the rotating shaft and the other side is composed of a worm gear rotatably fixed to the bracket, the operation piece is moved along the worm gear by the rotation of the motor Microwave oven is characterized in that the opening is variable. A switch input unit manipulated by a user to set cooking temperature and time and input an operation start command; A control unit which outputs various driving and control signals according to a cooking operation by an input of the switch input unit; Load driving means for driving loads necessary for a cooking operation by a drive signal output from the controller; A display unit for displaying predetermined data according to a setting state of the switch input unit and cooking operation of the load driving means by a control signal of the controller; And The microwave oven, characterized in that the opening is variable, characterized in that it comprises a motor driving unit for driving the motor to adjust the size of the opening in accordance with the control signal of the controller.