KR20100010394A

KR20100010394A - Micorwave oven

Info

Publication number: KR20100010394A
Application number: KR1020080071343A
Authority: KR
Inventors: 이철우
Original assignee: 엘지전자 주식회사
Priority date: 2008-07-22
Filing date: 2008-07-22
Publication date: 2010-02-01

Abstract

PURPOSE: A microwave oven is provided to disperse microwave, which is generated by a magnetron, inside a cooking room using one fan. CONSTITUTION: A microwave oven comprises a cavity, a convection chamber(71), a wave guide(84), and a fan(78). The cavity is formed in a cooking room. The convection chamber is connected to the cavity. The wave guide guides microwave to the convection chamber. The fan is installed inside the convection chamber. The fan circulates the air inside the cavity and the convection chamber.

Description

Microwave {Micorwave oven}

The present invention relates to a microwave oven.

In general, a microwave oven is a device that heats moisture by using microwaves generated from a magnetron of food accommodated in a cooking chamber, so that food is cooked. Further, a stirrer pan is further provided to evenly distribute the microwaves generated in the micron in the cooking chamber so that the food is cooked evenly.

In addition, the microwave oven is provided with a heater in addition to the magnetron is configured to cook food by the heat generated from the heater. And, by forcibly circulating the heat generated from the heater, the convection fan is further provided so that food is evenly cooked.

However, in the conventional microwave oven as described above, a stirrer pan and a convection pan are respectively provided, and when the food is cooked by the microwave, the stirrer pan is operated, and when the food is cooked by the heater, the convection pan is operated. It works. Therefore, since each fan must be provided in one microwave oven, there is a problem that the manufacturing cost of the microwave oven increases. In addition, there is a problem in that the production cost of the product is increased by increasing the number of assembly processes of each part by the application of parts of the individual function, there is a problem that the purchasing power for the product is reduced by increasing the defective rate of the product due to the application of a plurality of parts.

An object of the present invention is to provide a microwave oven in which a microwave generated from the magnetron is evenly distributed into the cooking chamber, as well as forming an air flow inside the cooking chamber with a single pan.

Embodiments of the present invention for achieving the above object, the cavity is provided with a cooking chamber; A convection chamber in communication with the cooking chamber; A wave guide guiding the microwaves to the convection chamber; And a fan installed in the convection chamber and configured to circulate air into the cooking chamber and the convection chamber or to diffuse the microwaves into the cooking chamber. It includes.

Another embodiment of the present invention, a cavity provided with a cooking chamber; A convection chamber in communication with the cooking chamber and receiving a microwave; At least one communication hole communicating the cooking chamber and the convection chamber; A convection heater installed in the convection chamber and heating air circulating in the cooking chamber and the interior of the convection chamber; An air flow installed in the convection chamber, the air flow circulating air inside the cooking chamber and the inside of the convection chamber, and an air flow that diffuses the microwaves delivered into the convection chamber into the cooking chamber. Fan to form; And a shielding member installed on the communication hole and allowing circulation of air and transmission of microwaves between the cooking chamber and the convection chamber. It includes.

According to the microwave oven according to the present invention, it is possible to force air circulation in the cooking chamber with one fan or to evenly distribute microwaves into the cooking chamber. Therefore, the number of parts to be used can be reduced, thereby reducing manufacturing costs and unnecessary space.

In addition, a portion of the air forced during the operation of the fan flows into the waveguide, it is possible to cool the magnetron, there is an advantage that the operation reliability of the component increases.

As a result, the satisfaction of the product is increased, thereby improving the image of the company.

Hereinafter, with reference to the drawings will be described a specific embodiment of the present invention. However, the spirit of the present invention is not limited to the embodiments presented, and those skilled in the art who understand the spirit of the present invention can easily suggest other embodiments within the scope of the same idea.

1 is a perspective view showing the appearance of a microwave oven according to the spirit of the present invention.

Referring to FIG. 1, the microwave oven 1 is formed in a substantially rectangular parallelepiped shape in which a cooking chamber 30 is provided therein. The microwave oven 1 is formed by the outer case 10 on both sides and the top surface. The outer case 10 is formed by bending a plate having a predetermined width and thickness, and the back plate 12 forming the outer surface of the microwave oven 1 and the base plate 14 forming the outer surface of the lower surface. Combined with.

In addition, the cooking chamber 30 is a space formed by the cavity 40 to be described below, and is a space in which food is cooked.

The cooking chamber 30 is selectively shielded by the door 20. The door 20 is formed to have a size corresponding to the front end of the outer case 10 and is rotatably mounted based on a lower end thereof. And, the front of the door 20 is provided with a door handle 22 that is gripped by the user to facilitate the rotation of the door 20.

In addition, an operation unit 24 to which an operation signal for setting an operation of the microwave oven 1 is input is provided above the door handle 22, that is, above the door 20. The operation unit 24 includes a plurality of buttons 25 and a display 26, and the operation state of the microwave oven 1 set by the buttons 25 is displayed on the display 26.

Figure 2 is a perspective view showing the rear of the cavity which is a main component of the microwave oven according to the spirit of the present invention, Figure 3 is an exploded perspective view showing the internal components of the microwave oven according to the spirit of the present invention, Figure 4 is The enlarged view of the inside of the microwave oven according to the idea.

2 to 4, the cavity 40 is formed of a substantially rectangular parallelepiped shape in which a plate having a predetermined thickness is bent or a plate forming at least one surface is welded, and the front surface is opened. In detail, the cavity 40 has a side plate 42 and a rear plate 44 integrally formed by bending a plate material into a substantially "c" shape, and an upper plate 46 coupled to an upper end thereof to form an upper surface. ), The bottom plate 48 is coupled to the bottom to form a lower surface. In addition, the inner space formed by the side plates 42 to the bottom plate 48 becomes the cooking chamber 30 in which food is cooked.

The front plate 69 is coupled to the front end of the side plate 42, the upper plate 46 and the bottom plate 48. The front plate 49 has a central portion drilled by the size of the cooking chamber 30 and forms the front surface of the microwave oven 1 when the door 20 is opened. The door 20 is coupled to the front plate 49. In addition, the back plate 12 is coupled to the rear ends of the upper plate 46 and the bottom plate 48.

Meanwhile, a plurality of discharge holes 52 and suction holes 54 are punctured on the rear surface of the cooking chamber 30, that is, the rear plate 44. The discharge hole 52 serves as an outlet through which hot air heated by the convection heater 76 to be described below is discharged into the cooking chamber 30. The discharge hole 52 is formed by drilling a plurality of holes having a predetermined diameter in a substantially rectangular shape at a position spaced a predetermined distance from the edge of the rear plate 44 to the inside.

The suction hole 54 serves as an entrance area through which the air inside the cooking chamber 30 is sucked into the convection chamber 71 to be described below. The suction hole 54 is formed by drilling a plurality of holes having a predetermined diameter in the center of the rear plate 44 in a substantially square shape.

In addition, a plurality of wave inlet holes 56 are drilled in the rear plate 44 at portions except the discharge hole 52 and the suction hole 54. The wave inlet hole 56 is a passage through which the microwave generated by the magnetron 80 to be described below flows into the cooking chamber 30. The wave inlet 56 is drilled into a substantially rectangular shape of a size through which microwaves can pass.

The wave inlet 56 is shielded by the mica sheet 58. The mica sheet 58 is formed in a sheet shape of a mica material having excellent fire resistance and insulation resistance, so as to shield the wave inflow hole 56. It is attached to the front surface of the plate 44. Therefore, the foreign matter (steam, smell, etc.) generated in the process of cooking food in the cooking chamber 30 by the mica sheet 58 is prevented from flowing into the wave inlet hole 56, the microwave is Pass through the mica sheet 58 is introduced into the cooking chamber 30.

As shown in FIG. 4, the mica sheet 58 is formed in a substantially "+" shape in which a central portion (a position corresponding to the suction hole) is perforated so as to shield the plurality of wave inlet holes 56 at one time. Would be preferred. In addition, the mica sheet 58 is formed in a shape corresponding to the wave inlet hole 56 and larger than the wave inlet hole 56, and may be attached to each of the wave inlet holes 56.

On the other hand, the electrical chamber 60 is formed in the space between the upper plate 46 and the outer case 10 and the space between the back plate 12 and the rear plate 44. The electric chamber 60 is a grill heater 61 for radiant heating, a convection device 70 for convection heating, a magnetron 80 for generating a microwave, a high voltage transformer for supplying high voltage power to the magnetron. (Not shown), a high-voltage capacitor (not shown), a control unit (not shown) for controlling the overall operation of the microwave oven 1, such as a space that accommodates a plurality of electrical components.

The grill heater 61 heats the food contained in the cooking chamber 30 with radiant heat. To this end, the grill heater 61 is fixed to the upper plate 46 to be exposed to the inside of the cooking chamber 30. The grill heater 61 generally uses a sheath heater, and various types of electric heaters, such as a ceramic heater and a halogen heater, are used as necessary.

The convection device 70 is provided on the outer side of the cooking chamber 30, that is, on the rear surface of the rear plate 44. The convection device 70 includes a convection chamber 71, a convection heater 76, a fan 78, and a convection motor 79.

The convection chamber 71 is formed of a flat hexahedral cylindrical metal body having an approximately front face, and the convection chamber 71 is fixed to the rear surface of the rear plate 44. Accordingly, a predetermined space is formed between the rear surface of the rear plate 44 and the convection chamber 71, and the space is formed in the discharge hole 52, the suction hole 54, and the wave inlet hole 56. It communicates with the said cooking chamber 30 by this.

The convection heater 76 is for heating the air introduced through the suction hole 54 and is provided in the convection chamber 71. The convection heater 76 mainly uses a sheath heater that generates heat by an electrical resistance, and various types of electric heaters such as ceramic heaters, halogen heaters, and quartz tube heaters may be used.

The fan 78 is provided inside the convection chamber 71 corresponding to the convection heater 76. The fan 78 formed of a metal body not only forms a flow of air circulating through the cooking chamber 30 and the convection chamber 71, but also serves to disperse the microwaves generated by the magnetron 80.

That is, when the food inside the cooking chamber 30 is cooked by the convection device 70, the air inside the cooking chamber 30 is rotated through the suction hole 54 by the rotation of the fan 78. It is sucked into the convection chamber 71 and heated by the convection heater 76. In addition, the air heated by the convection heater 76 is discharged into the cooking chamber 30 through the discharge hole 52. By repeating this process, the food in the cooking chamber 30 is cooked by convective heat.

And, when the food is cooked by the microwave, the microwave guided to the convection chamber 71 is dispersed by the rotation of the fan 78, the wave inlet (56) substantially, the It is radiated into the cooking chamber 30 through the car seat (58). In addition, the moisture of the food is heated by the microwave radiated into the cooking chamber 30 to cook the food.

The convection motor 79 is provided on the rear surface of the convection chamber 71. The fan 78 is coupled to the rotation shaft of the convection motor 79, and the fan 78 is driven by the rotational force generated by the convection motor 79. That is, the convection motor 79 is driven by an external power source, that is, a power source applied from the controller (not shown) to generate rotational force.

On the other hand, the chamber wave inlet hole 72 is drilled on the rear surface of the convection chamber 71. The chamber wave inlet 72 is a passage through which the microwave generated by the magnetron 80 flows into the convection chamber 71. A chamber mica sheet 73 is attached to the chamber wave inlet 72 so that the chamber wave inlet 72 is shielded. Therefore, only the microwaves pass through the chamber wave inlet hole 72 by the chamber mica seat 73.

The chamber mica sheet 73 is formed in a sheet shape having the same material as that of the mica sheet 58 described above, and a porous hole 74 is drilled in the center portion thereof. The porous hole 74 is formed with a diameter smaller than the wavelength of the microwave. In addition, the porous hole 74 is a portion of the cooking chamber 30 air introduced into the convection chamber 71 by the rotation of the fan 78 is introduced into the wave guide 84 to be described below. It is a passage.

The chamber wave inlet 72 is in communication with the wave guide 84. The wave guide 84 is formed in the form of a duct of a metal body to form a movement path of the microwave generated by the magnetron (0). That is, one end of the wave guide 84 is coupled to the magnetron 80 to receive the antenna 82 of the magnetron 80, the other end is in communication with the chamber wave inlet 72 It is coupled to the back surface of (71).

Accordingly, the magnetron 80 substantially, the microwave radiated from the antenna 82 is guided into the convection chamber 71 by the wave guide 84, the interior of the convection chamber 71 The microwave guided into is dispersed by the pan 78 and radiated into the cooking chamber 30.

Hereinafter will be described the operation of the microwave oven according to the spirit of the present invention having the configuration as described above.

When the user selects the cooking mode using the convection device 70 by using the manipulation unit 24, the controller (not shown) turns on the convection heater 76. At the same time, the convection motor 79 is turned on, and the fan 78 is rotated.

When the fan 78 is rotated, the air inside the cooking chamber 30 is sucked into the convection chamber 71 through the suction hole 54. In addition, the air sucked into the convection chamber 71 is heated by the convection heater 76. The air heated by the convection heater 76 is discharged into the cooking chamber 30 from the inside of the convection chamber 71 through the discharge hole 52 by the driving of the fan 78. .

As described above, the hot air discharged into the cooking chamber 30 convections inside the cooking chamber 30, and the above process is repeatedly performed to heat food contained in the cooking chamber 30.

On the other hand, when the user selects a cooking mode using the microwave using the operation unit 24, the controller (not shown) to turn on the magnetron (80). At the same time, the convection motor 79 is turned on to drive the fan 78.

In addition, the magnetron 80 substantially, the microwave emitted from the antenna 82 is guided by the wave guide (84). The microwave guided by the wave guide 84 is introduced into the convection chamber 71 through the chamber wave inlet 72 substantially, the chamber mica seat 73.

The microwaves introduced into the convection chamber 71 are evenly dispersed by the rotating fan 78 and the wave inlet 56 substantially, and the cooking chamber 30 through the mica sheet 58. ) Is radiated inside. Therefore, the food accommodated in the cooking chamber 30 is heated and cooked by microwave.

In addition, the air in the cooking chamber 30 flows into the suction hole 54 into the convection chamber 71 by the rotation of the fan 78. And, most of the air introduced into the convection chamber 71 is discharged into the cooking chamber 30 through the discharge hole 52, a part of the porous hole 74 of the chamber mica seat 73 Through the wave guide 84 is introduced. Since the air introduced into the waveguide 84 cools the magnetron 80 substantially, the antenna 82 has an effect of improving the operation reliability of the magnetron 80.

Figure 2 is a perspective view showing the rear of the cavity which is a main component of the microwave oven according to the spirit of the present invention.

Figure 3 is an exploded perspective view showing the internal components of the microwave oven according to the spirit of the present invention.

Figure 4 is an enlarged view of the inside of the microwave oven according to the spirit of the present invention.

Explanation of symbols on the main parts of the drawings

1. Microwave 10. Outcase

12. Backplate 14. Baseplate

20. Door 22. Door handle

24. Control panel 25. Button

26. Display 30. Cooking Room

40.Cavity 42.Sideplate

44. Rear Plate 46. Upper Plate

48. Bottom plate 49. Front plate

52. Outlet hole 54. Suction hole

56. Wave inflow hole 58. Mica seat

60. Electric Heater 61. Grill Heaters

70. Concealment Device 71. Concealment Chamber

72. Chamber wave inlet hole 73. Chamber mica seat

74. Porous Hole 76. Convection Heater

78. Fan 79. Convection Motor

80. Magnetron 82. Antenna

84. Wave Guide

Claims

Cavity is provided with a cooking chamber;

A convection chamber in communication with the cooking chamber;

A wave guide guiding the microwaves to the convection chamber; And

A fan installed in the convection chamber and configured to circulate air into the cooking chamber and the convection chamber or to diffuse the microwaves into the cooking chamber; Microwave including a.

The method of claim 1,

At least one surface of the cavity, the microwave oven for drilling at least one wave inlet through which the microwave flows from the convection chamber.

The method of claim 1,

And a convection heater configured to heat air circulating in the cooking chamber and the interior of the convection chamber.

The method of claim 3, wherein

And at least one discharge hole and a suction hole through which air circulating in the cooking chamber and the inside of the convection heater flows into at least one surface of the cavity.

Cavity is provided with a cooking chamber;

A convection chamber in communication with the cooking chamber and receiving a microwave;

At least one communication hole communicating the cooking chamber and the convection chamber;

A convection heater installed in the convection chamber and heating air circulating in the cooking chamber and the interior of the convection chamber;

An air flow installed in the convection chamber, the air flow circulating air inside the cooking chamber and the inside of the convection chamber, and an air flow that diffuses the microwaves delivered into the convection chamber into the cooking chamber. Fan to form; And

A shielding member installed on the communication hole and allowing circulation of air and transmission of microwaves between the cooking chamber and the convection chamber; Microwave including a.

The method of claim 5, wherein

And an antenna of a magnetron that oscillates the microwave by an airflow formed by the fan.

The method of claim 5, wherein

Microwaves oscillated from the magnetron is guided to the convection chamber through a wave guide.