KR20040019624A - Door Cooing Device For Microwave Oven - Google Patents

Abstract

PURPOSE: A door cooling device for a microwave oven is provided to efficiently cool a door of a microwave oven by using natural convection of air without a ventilating device. CONSTITUTION: A door frame(53) forms an external appearance including a front surface of a door(50). A door panel(55) is installed on a rear surface of the door frame. A part of the door panel forms a protruded part(100) protruded toward a front to be exposed through the door frame. The door panel is made of a transparent material so that a user watches an inside of a cooking compartment. A plurality of vents(102) are perforated on the door panel, following a frame of the protruded part. A back cover(84) is mounted at a rear of the door panel, and contacts with the cooking compartment. Air flowed in through the plurality of vents are exhausted to the outside, thereby cooling the door and components of a controller formed at the door.

Description

Microwave Oven Door Chiller {Door Cooing Device For Microwave Oven}

The present invention relates to a microwave oven, and more particularly to a microwave oven door cooling apparatus for efficiently cooling the door by using the natural convection of air supplied from the bottom of the microwave oven door.

1 is an exploded perspective view of a conventional microwave oven, and FIG. 2 is an exploded perspective view of a conventional microwave oven door.

As shown in the drawings, the cavity assembly 10 is provided with a cooking chamber 12 and an electrical equipment chamber 14. The front of the cavity assembly 10 is mounted with a door 20 for opening and closing the opened front of the cooking chamber 12.

The cooking chamber 12 is a space for supplying microwaves generated from the components of the electrical equipment chamber 14 and is a space for heating food, and is configured to be opened and closed by the door 20 to prevent leakage of the microwaves. The electric chamber 14 is equipped with a high voltage transformer 16 and a magnetron 18 for generating microwaves, and a blower fan 19 for dissipating electric components.

In addition, a toaster part 11 is provided at a front portion of the electric compartment 14, and the toaster part 11 is configured to be opened and closed by the toaster door 13.

The cavity assembly 10 including the cooking chamber 12 and the electric compartment 14 is covered by an outer casing 17, the outer casing 17 being substantially the appearance of the upper and both sides of the microwave oven. Will form.

Next, the internal structure of the microwave oven door will be described in detail with reference to FIG. 2.

The microwave oven door 20 constitutes an exterior in which the door frame 21 includes a front surface thereof. The front upper end and the center inner side of the door frame 21 are formed to penetrate so that a part of the door panel 22 to be described below is exposed.

The door panel 22 is installed on the rear surface of the door frame 21, a part of which protrudes forward and is exposed to the front of the door 20 through the door frame 21. Such door panel 22 is preferably formed of a transparent material so that the inside of the cooking chamber 12 can be seen from the outside.

The controller seat 23 is formed on the upper end of the door panel 22 to the left and right. The operation panel 24 is installed on the front surface of the controller seat 23. The operation panel 24 is provided with a display unit 24 ′ and a plurality of buttons (not shown) to adjust the microwave function. A substrate (not shown) that is electrically connected to the control portion is mounted on the rear surface of the controller seating portion 23, and a plurality of electronic components are installed on the substrate.

A choke cover 26 is installed at the rear side of the door panel 22 to form a structure in which microwaves can be attenuated without leakage. The back frame 27 is installed in close contact with the rear side of the choke cover 26, and the back cover 28 is mounted on the back frame 27. Here, the back cover 28 is a surface in contact with the cooking chamber 12 of the door 50.

Next, the structure related to the door cooling of the microwave oven will be described.

A suction port 21a through which air is sucked into the door 20 is formed at a side of the door frame 21 in contact with the toaster part 11. An exhaust port 21b through which air in the door 20 may be discharged is formed on the opposite side of the door frame 21. In addition, the air circulated through the electric compartment 14 is supplied to the inlet port 21a formed on the side of the door frame 21 by the blower fan 19 inside the electric compartment 14.

A certain space is maintained between the door frame 21 and the back cover 28 that is in contact with the cooking chamber 12 to form a structure in which air introduced through the inlet port 21a can flow to the exhaust port 21b.

Hereinafter, the cooling process of the door in the microwave oven having the above structure will be described.

When food is put into the cooking chamber 12 and the door 20 is closed and the operation buttons installed in the controller 25 are operated, the high pressure transformer 16 and the magnetron 18 operate, and the cooking chamber (12) The microwave is supplied inside, and the food starts to heat up.

Then, while the food is heated, the blowing fan 19 installed in the rear of the electric compartment 14 is operated. The blower fan 19 generates an airflow for dissipating heat generated during the operation of the high pressure transformer 16 and the magnetron 18. Therefore, the airflow generated in the blower fan 19 cools them while passing through the high pressure transformer 16 and the magnetron 18 located in front of the blower fan 19.

And a part of the air which cooled these, flows in into the inside of the said cooking chamber 12, circulates inside the cooking chamber 12, and escapes to the exterior of the cooking chamber 12 like water vapor | steam which generate | occur | produces during heating, etc. Will ventilate the interior.

A part of the air sucked into the electric chamber 14 is blown into the door 20 through the air inlet 21a formed at one side of the door frame 21 by the blowing fan 19 of the electric chamber 14. . The air introduced into the door 20 is discharged through an exhaust port 21b formed at the other side of the door frame 21 through an air flow passage formed by the door frame 21 and the back cover 28.

However, in the case of the door 20 cooling structure as described above, there is a problem that the suction of air into the door 20 and the discharge of air to the outside of the door 20 are not smoothly performed. In particular, the air flow is not smooth inside the protruding portion of the door panel 22, so that the cooling of the controller 25 installed inside the protruding portion is not performed smoothly, which may cause a failure or malfunction due to overheating of the controller 25. There is.

In the door 20 cooling structure as described above, the flow of air is caused by forced blowing of the blower fan 19 provided in the electrical equipment chamber 14. In this case, in the design of the structure of the microwave oven, there is a structural disadvantage in that the installation structure of the blower fan 19 of the electrical equipment compartment 14 must be considered for cooling the door 20.

An object of the present invention is to implement a door cooling apparatus of a microwave oven that efficiently cools the door of the microwave oven by using natural convection of air without a separate blower.

Another object of the present invention is to implement a door cooling apparatus for efficiently cooling a controller in a microwave oven in which a controller is mounted to a door.

1 is an exploded perspective view of a typical microwave oven.

Figure 2 is an exploded perspective view of a conventional microwave oven door.

Figure 3 is an exploded perspective view showing the configuration of a preferred embodiment of the microwave oven door cooling apparatus according to the present invention.

Figure 4 is an exploded perspective view showing a detailed structure of the embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

10 ........ Cavity assembly 11 ........ Toaster section

12 ........ cooking room 13 ........ toaster door

14 ........ Battlefield 50 ........ Door

52 ........ Handle 53 ........ Door Frame

55 ........ Door panel 56 ........ Controller seat

60 ........ Controller 62 ........ Control panel

64 ............ Flexible Cable 65 ........ Board

100 ....... Projection 102 ....... Aeration

Microwave door cooling apparatus according to the present invention for achieving the above object comprises a door frame having a front surface of the door and a portion of the structure is penetrated; A door panel mounted on a rear surface of the door frame and having a protrusion exposed through the penetrating portion of the door frame to the front of the microwave oven, and having a plurality of ventilation holes formed along an edge of the protrusion, and a rear side of the door panel. It is mounted on and is configured to include a back cover that is in contact with the cooking chamber.

In the embodiment of the present invention, the front panel of the door is characterized in that the controller having a configuration for the operation of the microwave oven is exposed to the upper front of the door.

According to the microwave oven door cooling apparatus according to the present invention having such a configuration, there is an advantage that the door of the microwave oven can be efficiently cooled using natural convection of air.

Hereinafter, a configuration of a preferred embodiment of a microwave oven door cooling apparatus according to the present invention having the configuration as described above will be described in detail with reference to the accompanying drawings.

3 shows an exploded perspective view of a door configuration of an embodiment of the present invention, and FIG. 4 shows a detailed structure of a cooling device of the door.

As shown, in the door 50 that selectively opens and closes the cooking chamber, the door frame 53 constitutes an appearance including the front surface of the door 50. The top and center of the door frame 53 is formed to penetrate through, and a part of the door panel 55 to be described below is exposed to the front of the door 50 through the penetrated portion.

The door panel 55 is installed on the rear surface of the door frame 53, a part of which protrudes forward to form a protrusion 100 exposed to the front of the door 50 through the door frame 53. . Such a door panel 55 is preferably formed of a transparent material so that the inside of the cooking chamber can be seen from the outside.

The controller seating part 56 is formed at an upper end of the door panel 55 in a lengthwise direction. The controller seating part 56 is formed to protrude forward of the door panel 55, and a display hole 56h is formed at the center thereof, and a cable slot 56s is formed at one side thereof.

In the present invention, the operation panel 62 and the substrate 65 constituting the controller 60 are respectively seated on the controller seat 56 formed on the upper and left sides of the door panel 55. Therefore, the controller 60 is mounted to be exposed to the upper front of the door 50.

Here, the substrate 65 is mounted on the rear surface of the controller seat 56 of the door panel 55, and the operation panel 62 is seated on the front of the controller seat 56. Electrical connection between the operation panel 62 and the substrate 65 is made by the flexible cable 64 is connected to the connector 67.

A choke cover 80 is installed at the rear side of the door panel 55 to form a structure in which microwaves can be attenuated without leakage. On the rear side of the choke cover 80, the back frame 82 is installed in close contact with the back frame 82, and the back cover 84 is mounted to be in contact with the cooking chamber of the microwave oven.

The ventilation hole 102 is drilled along the edge of the protrusion 100 of the door panel 55. Air is introduced into the vent hole 102 of the lower surface of the protrusion 100 to serve as an air intake port, and the heated air may be discharged through the door 50 to the vent hole 102 of the upper surface. It serves as an air vent.

A predetermined space is maintained between the door panel 55, the choke cover 80, and the back cover 84 to allow air to pass through. That is, air can flow through the gap between the elements. The back panel of the upper controller 60 of the door panel 55 is installed, and the clearance between the choke cover 80 and the back cover 84 forms a structure that allows the flow of air. Air introduced into the vent hole 102 on the lower surface of the protrusion part 100 of the door panel 55 passes through the rear space of the controller 60 and is disposed on the upper side of the protrusion part 100 of the door panel 55. 102) to a structure that can be discharged.

The vent hole 102 in which the air intake and exhaust occurs is preferably formed on the upper and lower surfaces and both sides of the door panel 55 along the protrusion 100. In addition, according to the shape of the protrusion 100 of the door panel 55, the position and function of forming the ventilation hole 102 is different, the door panel 55 and the door frame 53 and the back cover 84 It is also possible to achieve different structures depending on the shape of).

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

When the object to be cooked is placed in the cooking chamber, the door 50 is tightly closed, and the cooking start button 62` is pressed on the upper portion of the microwave oven 50, the microwave generated in the electric room (not shown) is cooked in the cooking chamber. (12) It is irradiated inside and a cooking object is heated. As the cooking object is heated, the temperature of the cooking chamber rises and heat is transferred to the microwave oven door 50.

When the door 50 is heated, the air inside the door 50 is also heated. The heated air moves from the bottom to the top of the inside of the door 50 by natural convection. At this time, air flows through the vent hole 102 to the inside and the outside of the protrusion formed over the center and the top of the door. As air flows through the vent hole 102, convection of air is naturally formed in the door. As the above process is repeated, fresh air introduced into the door 50 cools the door 50, and also cools each component of the controller 60 installed in the door 50.

The cooling process of the door 50 as described above does not require a separate blower, and through the natural convection of air, the same cooling of the door 50 as is done by forcibly blowing the air in the electric chamber 14 using the blower. The effect can be obtained. As described above, since the door 50 is cooled by the convection of the internal air of the door 50, the controller 60 can be attached to the door 50 of the microwave oven which is in close contact with the cooking chamber.

The scope of the present invention is not limited to the above embodiments, but is defined by the claims, and it is obvious that the present invention includes various modifications made by those skilled in the art and equivalents.

According to the present invention by the above configuration can be cooled both the inside and the outside of the door of the microwave oven, there is a risk that the user is less likely to be burned in use by the heating of the door has the effect of improving the safety of the product.

In addition, it is possible to cool the control unit mounted on the door to prevent the overheating of each component of the controller, it is possible to prevent the occurrence of a failure of the microwave oven due to overheating is obtained.

Therefore, since the temperature rise of the door can be prevented, it is possible to use a material having a relatively low heat resistance to the door, resulting in a material cost reduction effect. For example, the front glass material of the door may be a relatively low heat resistant but cheap ABS material instead of a high heat resistant PC material.

Claims (2)

A door frame forming a front surface of the door and having a portion penetrated therethrough; A door panel mounted on a rear surface of the door frame and having a protrusion exposed through the penetrating portion of the door frame to the front of the microwave oven, and having a plurality of ventilation holes formed along an edge of the protrusion; And a back cover mounted to the rear side of the door panel and configured to contact the cooking chamber. The microwave oven door cooling apparatus according to claim 1, wherein a controller having a structure for operating the microwave oven is mounted to the front of the door to be exposed to the front of the door panel.