KR100381164B1 - A heating device and method of micro wave oven - Google Patents

Abstract

The heating apparatus of the microwave oven according to the present invention comprises: a heater main body disposed between an inner panel forming a cavity and an outer panel assembled to the outside of the inner panel to accommodate food; A reflecting plate reflecting heat radiated from the heater body to the food side to the food side, and a shielding plate rotatably disposed between the heater body and the food; It comprises a drive means for rotating the shielding plate, it is possible to arrange the shielding plate horizontally between the heater body and the food to convection-type cooking to slowly heat the air inside the cavity, the shielding plate Radiation type cooking is possible by placing vertically between the heater body and the food so that the heat generated from the heater body is directly transmitted to the food, and using one heater body reduces the overall size and production cost of the microwave oven. There is an advantage to this.

Description

Heating device and method of microwave oven {A HEATING DEVICE AND METHOD OF MICRO WAVE OVEN}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave oven, and more particularly, to a heating apparatus of a microwave oven capable of cooking by a convection method and a cooking method by using a single heater body.

In general, a microwave oven generates microwaves using electricity, and infiltrates the microwaves into food, causing the food to heat up to the core in a short time as heat is generated by molecular vibrations inside the food.

Conventional microwave ovens, as shown in Figure 1, the inner panel 4 for forming a cavity (cavity) so that food can be accommodated; An outer panel 2 assembled outside the inner panel and provided with a driving manipulator 27 and a controller (not shown) for driving a microwave oven; A door (10) rotatably coupled to the outer panel (2) and having a viewing window (8); A magnetron (not shown) for oscillating microwaves; And a waveguide (not shown) for guiding the microwaves generated by the magnetron into the cavity.

The turntable 20 is disposed on the inner bottom of the inner panel 4 so that food can be placed thereon, and the turntable 20 is rotated by the driving motor 22 and the roller 24 so that the food is cooked evenly.

On the other hand, recently, in addition to cooking food by the microwave according to the request of the consumer to be able to cook a variety of food using a heating device.

Figure 2 is a cross-sectional view showing the configuration of the main portion of the microwave oven in which the heating device according to the prior art is disposed, the heating device between the inner panel 4 and the outer panel 2 to apply a high heat directly to the food inside the cavity Radiation cooking heater 12 installed on one side, the reflecting plate 14 reflecting the heat radiated from the radiating cooking heater 12 to the food side opposite to the food side, and the inside of the food by slowly heating the air inside the cavity It consists of a convection cooking heater 16 installed on one side of the inner panel 4 so as to slowly heat up to.

On the other hand, the operation control unit 27 is installed on the convection cooking button 28 for operating the convection cooking heater 16 and the radiation cooking button 29 for operating the radiating cooking heater 12, respectively. do.

In the conventional microwave oven configured as described above, after the user places food such as bread to be cooked on the turntable 20, the door 10 is closed and the convection cooking button 28 is pressed. The convection cooking heater 16 is operated to slowly heat the air inside the cavity, thereby allowing food on the turntable 20 to be cooked while the outside and the inside are slowly heated.

Then, after the user puts food such as fish on the turntable 20, closes the door 10 and presses the copy cooking button 29, the control unit operates the radiating cooking heater 12. The heat generated from the radiating cooking heater 12 is directly transmitted to the food.

On the other hand, such a microwave should minimize the radiant heat transfer that heats the surface of the food rapidly by heating the convection heat of the convection cooking heater 16 directly from the heater to food when cooking in a convection method, and increases the convection heat transfer effect In order to make the heat generating area of the heater to be large, the radiant heat of the radiant cooking heater 12 is to be directly heat-transferred to food when cooking in a radiant manner.

However, the conventional microwave oven is expensive to install each of the convection cooking heater 16 and the radiating cooking heater 12, there is a problem that the structure is complicated.

In addition, since each of the convection cooking heater 16 and the radiating cooking heater 12 must be provided, the overall size of the microwave oven becomes large, and thus there is a problem in that the cost is high.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and has an object to provide a heating apparatus of a microwave oven which can reduce the size of the microwave oven, the structure thereof is simple, and the cost can be reduced. .

1 is a perspective view of a microwave oven in the prior art,

Figure 2 is a cross-sectional view showing the configuration of the main part of the microwave oven according to the prior art,

3 is a cross-sectional view showing a state in which the heating apparatus of the microwave oven according to the present invention operated in a convection cooking method,

4 is a cross-sectional view showing a state in which the heating apparatus of the microwave oven according to the present invention is operated in a copy cooking method,

5 is a block diagram of a heating apparatus of a microwave oven according to the present invention.

<Explanation of symbols on main parts of the drawings>

50: inner panel 51: cavity

56: air guide portion 60: outer panel

70: heater body 72: reflector

76: shield plate 80: blower

84: motor 90: control unit

The heating apparatus of the microwave oven according to the present invention for solving the above problems is a heater body disposed between the inner panel and the outer panel is assembled to the outside of the inner panel to form a cavity to accommodate food; A reflecting plate reflecting heat radiated from the heater body to the food side to the food side, and a shielding plate rotatably disposed between the heater body and the food; It characterized in that it comprises a drive means for rotating the shield plate.

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

3 is a cross-sectional view showing a state in which the heating apparatus of the microwave oven according to the present invention is operated in a convection cooking method, Figure 4 is a cross-sectional view showing a state in which the heating apparatus of the microwave oven according to the present invention is operated in a copy cooking method, 5 is a block diagram of a heating apparatus of a microwave oven according to the present invention.

The heating apparatus of the microwave oven according to the present invention is assembled to the outside of the inner panel 50 and the inner panel 50 forming the cavity 51 so that food can be accommodated as shown in FIGS. A heater body 70 disposed between the outer panel 60; A reflector plate 72 for reflecting heat radiated from the heater body to the food side to the food side, and a shield plate 76 rotatably disposed between the heater body 70 and the food; A motor (84) for imparting a driving force to rotationally drive the shield plate (76); A blower (80) for circulating air in the cavity (51); It includes a control unit 90 for outputting a drive signal to the motor and the blower (80).

The inner panel 50 is formed with a heater hole 52 so that the heat radiated from the heater body 70 can cook the food inside the cavity 51, and in accordance with the driving of the blower 80 A blower hole 54 is formed to allow air inside the cavity 51 to pass through the inner panel 50 and the outer panel 60 and back into the heater hole 52. An air guide 56 is formed between the panel 50 and the outer panel 60 so as to circulate air inside the cavity 51 by driving the blower 80 to cook food.

On the other hand, a driving operation unit (not shown) for driving operation of the microwave oven is disposed on one side of the outer panel 60, and the driving operation unit is generated in the heater body 70 as in the case of food such as bread. Convection cooking button 64 for cooking by the convection method to heat the air inside the cavity 51 to cook the food slowly, and in the heater body 70 as in the case of food such as fish Radiation cooking buttons 66 and the like are arranged for the cooking by the radiation method such that the generated heat is directly transmitted to food such as fish.

The reflection plate 72 radiates heat radiated from the heater body 70 to the outer panel 60 to the inside of the cavity 51 through the heater hole 52. It is disposed rotatably between the panels 60, the center of rotation is connected to the rotation axis (not shown) of the motor.

In addition, the reflective plate 72 is formed with an air passing hole 74 so that the reflective plate 72 heated by the heat radiated from the heater body 70 can serve as a heat exchanger.

The blower 80 is positioned between the heater hole 52 and the blower hole 54 so that the air inside the cavity 51 passes through the air passing hole 74 and the reflecting plate 72. Force circulation for heat exchange.

Referring to the operation and heating method of the present invention configured as described above are as follows.

First, when the user puts food, such as bread, to be slowly heated and cooked inside the cavity and presses the button 64 for convection cooking, the controller 90 determines that the shield plate 76 The shield plate 76 is rotated horizontally as shown in FIG. 3 by driving the motor 84 to block the heater body 70 and the food. In addition, the control unit 90 allows power to be supplied from the power supply unit 92 to the heater body 90 so that heat is radiated from the heater body 70, thereby radiating from the heater body 70. Heat sweetens the reflector 72. At this time, the control unit 90 drives the blower 80, and the air inside the cavity 51 is driven by the blower 80 so that the blower hole 54 and the air guide unit 56. After passing through the air passage hole 74 of the hotly heated reflecting plate 72, passing through the side of the heater body 70 is heated, the food in the cavity 51 through the heater hole 52 Cook while convection. When the cooking of the food is finished, the controller 90 cuts off power to the heater body 70 and stops driving of the blower 80.

On the other hand, when the user presses the button for the radiation cooking 66 to cook food such as fish that should be cooked by applying heat directly to the food, the control unit 90 determines that the heater body 70 The heat radiating directly toward the food side is not bypassed, and the motor 84 is driven so that the shield plate 76 is directly supplied to the food, and the shield plate 76 is connected to the heater body 70 as shown in FIG. 4. Place vertically between foods. In addition, the controller 90 supplies power to the heater body 70 to radiate heat from the heater body 70. At this time, the heat radiated from the heater body 70 toward the reflecting plate 72 is reflected by the reflecting plate 72 to the food side so that the food is quickly cooked. When the cooking of the food is finished, the control unit 90 cuts off power to the heater body 70.

The heating apparatus of the microwave oven of the present invention configured as described above allows heat to be generated by one heater main body, and installs a shielding plate rotated by the motor between the heater main body and food, and the air inside the cavity. By installing a blower for forced circulation, the cooking by the radiation method and the cooking by the convection method can be selectively selected, thereby reducing the overall size of the microwave oven, thereby reducing the cost, and the conventional convection heater There is an advantage that can solve the inconvenience of having to install the heater and the radiation cooking respectively.

In addition, the air passage hole is formed in the reflector, and the reflector may act as a heat exchanger by driving the blower, so that the size of the heater body does not need to be increased in order to increase the heat transfer area. .

And, in the heating method of the microwave oven of the present invention, the control unit determines the user's pressing operation, and by simply rotating the shield plate can perform any one of cooking by the convection method and cooking by the copy method. There is an advantage.

Claims (5)

A heater body disposed between an inner panel forming a cavity to accommodate food and an outer panel assembled outside the inner panel; A reflecting plate reflecting heat radiated from the heater body to the food side to the food side, and a shielding plate rotatably disposed between the heater body and the food; And a heating means for driving the shield plate to rotate. The method of claim 1, The driving means includes a motor for applying a driving force to rotate the shield plate; And a control unit for outputting a driving signal to the motor. The method according to claim 1 or 2, The heating apparatus for a microwave oven further comprises a blower for circulating the air in the cavity. The method of claim 1, The reflector is a heating device of the microwave oven, characterized in that the air passage hole is formed so as to serve as a circulation passage of the air and the heat exchanger. In the cooking selection step of selecting one of the convection dishes and radiant dishes according to the user's pressing operation, and when the determination result of the cooking selection step is determined to be convection dishes, the food is blocked between the heater and the main body by using a shield plate. A convection cooking step of circulating air to cook food and a radiation cooking step of directly cooking food by heat generated from the heater body by rotating the shielding plate when the determination result of the cooking selection step is determined to be copy cooking. Heating method of a microwave oven, characterized in that configured to include.