KR100302903B1 - Heater supporting device of microwave oven - Google Patents

Abstract

PURPOSE: A supporting device for supporting electronic heater is provided in upper plate of an inner case. Both end are U shaped to cover the electronic heater to prevent falling off while operation. CONSTITUTION: An inner case(120) is formed with a cooking chamber(200). An outer case(110) is connected with the inner case(120) by a certain interval to form a pre-chamber(400) by differentiating with the cooking chamber(200). One end of an electronic heater(220) penetrates through a side of the inner case(120) to the pre-chamber(400). The other end of the electronic heater(220) is positioned at upper side of the cooking chamber(200) to heat food. A supporting device(300) supports the other end of the electronic heater(220). Both end of the supporting device(300) are bent to surround the electronic heater(220).

Description

Microwave heater support device

The present invention relates to a microwave oven, and more particularly, to a heater support apparatus for a microwave oven provided on an inner case top plate to support an electric heater.

In general, a microwave oven is a device that cooks food by frictional heat between molecules by radiating high frequency of 2450MHz fundamental wave from magnetron into the cooking chamber and repeatedly converting the molecular arrangement of moisture in food. By the way, a kind of convection microwave oven equipped with an electric heater that generates heat inside the cooking chamber is commercially available.

The convection microwave is divided into a cooking compartment in which food is accommodated and an electrical appliance compartment in which various electric appliances are mounted in a housing constituting the outer body.

The housing consists of an inner case constituting the cooking chamber and an outer case which surrounds it at a predetermined interval and partitions the electrical equipment compartment on one side. The electronics compartment is equipped with a magnetron that emits high frequency radiation to the cooking chamber, a high voltage capacitor that applies a high voltage to the magnetron, a high voltage transformer, and a cooling fan for cooling the electronic device that generates heat. In addition, a guide duct is provided to send most of the heat exchanged air to the cooking chamber while passing through the magnetron.

The cooking chamber is provided with a turntable-type cooking plate on which food is placed on the bottom surface, and an electric heater, which is bent at the top and generates heat, is rotatably provided.

The electric heater is to heat the cooking chamber so that the food is cooked by the heat, the terminal is provided at the right end thereof is supplied with power. That is, the terminal part is installed to protrude into the electrical equipment compartment through the inner case right side plate, and the wire is connected. For this purpose, a circular through hole is formed in the inner case right side plate, and the terminal unit is fitted into the through hole and is rotatably coupled. Is configured to be able to change the position by rotating the electric heater in a horizontal state or a predetermined angle.

On the other hand, the upper surface plate constituting the ceiling surface of the cooking chamber is provided with a support member for supporting the other end thereof so that the rotational movement of the electric heater is made smoothly. The supporting member of the alumina material having excellent heat resistance is fixed at one end to the inner case top plate, and at the other end, a locking part is formed to be supported by a rod-shaped electric heater, and the fixing structure thereof is illustrated in FIGS. 1 and 2. If described in detail as follows.

First, as shown in these, the inner case top plate 10 is provided with a rectangular mounting opening 11. The upper surface of one end of the support member 20 is provided with a rectangular protrusion 21 protruding to be fitted into the mounting hole 11, the guide groove 22 is recessed in the recess on both sides of the lower end of the rectangular protrusion 21. . In addition, the other end portion of the support member 20 is formed with a locking portion 23 bent so that the electric heater 40 is leisurely caught.

And the plate spring 30 is coupled to the square protrusion 21 exposed to the outside and the center is bent at a predetermined curvature so as to have its own elastic force, and the insertion hole (2) is inserted into the center (21) to the room (25) 31 and the coupling groove 32 is formed to extend in one side so as to be fitted into the guide groove 22.

Therefore, when the square protrusion 21 of the support member 20 is inserted into the installation opening 11, the tip portion of the square protrusion 21 is exposed to the outside of the inner case upper plate 10. After inserting the plate spring 30 using the insertion hole 31 in the square projection 21 exposed to the outside continuously, and pushes one side thereof to be fitted into the guide groove 22 by using the coupling hole (32). (B arrow direction in FIG. 1) The leaf spring 30 is fixed to the inner case top plate 10 outside. Accordingly, one side end of the support member 20 provided with the square protrusion 21 is firmly fixed to the inner case upper plate 10, and the other end of the electric heater 40 is coupled to the engaging portion 23 to support it. Done. At this time, the leaf spring bent at a predetermined curvature 30 is maintained as it is coupled with its own elastic force.

However, since the support member 20 of the conventional microwave oven is made of alumina, which is a white amorphous powder obtained by heating aluminum hydroxide, its manufacturing cost increases. In addition, since the other side of the electric heater 40 is simply caught by the locking portion 23 of the support member 20, the electric heater 40 is pulled out of the locking portion 23 due to a mistake of the user. Is generated so that the support of the electric heater 40 cannot be completely performed.

The present invention is to solve this problem, an object of the present invention is to provide a support device for supporting the electric heater to the inner case top plate constituting the cooking chamber, both ends of the "U" shape to surround the electric heater By forming a bracket which is bent and fixed to the inner case top plate, it is possible to provide a heater support device for a microwave oven which prevents the electric heater from being separated during operation, thereby improving its reliability and reducing manufacturing costs.

1 is an exploded perspective view schematically showing an installation structure of an electric heater support member of a conventional microwave oven.

Figure 2 is a cross-sectional view taken along the line AA of Figure 1, showing a coupling state of the support member.

3 is a cross-sectional view showing the overall internal structure of the microwave oven to which the present invention is applied.

4 is an exploded perspective view of the heater support apparatus according to the present invention.

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

120. Inner case 121. Top plate

220. Electric heater 300. Support device

310..Installation bracket 320..Bracket

321 .. projection 322 .. step

323..Home 330.Plate springs

The present invention for achieving this object, the inner case forming the cooking chamber, the outer case is coupled to the inner case and spaced apart at a predetermined interval to form the electrical compartment compartment partitioned with the cooking chamber, one end protrudes through the inner case side plate to the electrical equipment compartment The other end is located in the upper part of the cooking chamber, the electric heater to generate heat to cook the food, the electronic device having a support device coupled to the mounting hole formed on the upper plate of the inner case to support the other end of the electric heater In the stove,

The support device is characterized in that the both ends are bent to surround the electric heater and has a plate-like bracket that is fitted and coupled to the installation.

Hereinafter, one preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 is a cross-sectional view showing the overall structure of the convection microwave oven according to the present invention, Figure 4 is an exploded perspective view showing an electric heater support apparatus according to the present invention.

As shown in the convection microwave oven according to the present invention, the cooking chamber 200 and the electrical equipment compartment 400 are separately provided in the housing 100 forming the exterior, and the cooking chamber 200 is opened and closed. The door (not shown) is hinged. The housing 100 is an outer case coupled to surround the inner case 120 to be spaced apart at a predetermined interval so as to form an inner case 120 forming the cooking chamber 200 therein, and the electrical compartment 400 partitioned from the cooking chamber 200. Consists of 110.

The electrical equipment room 400 is equipped with a magnetron 410 radiating high frequency to the cooking chamber, a high-voltage transformer 420 applying high voltage thereto, a cooling fan (not shown) for cooling them, and the like. The outer portion of the housing 100 corresponding to the control unit (not shown) for operating the full function of the microwave oven is configured.

In addition, the cooking chamber 200 includes a disc-shaped cooking plate 210 that rotates in a turntable manner by the driving motor 211, and an electric heater 220 that emits heat so that cooking is performed by heat is installed on the upper side. .

The electric heater 220 is formed to be bent, and the terminal portion 221 to which power is supplied is provided at one end. Therefore, the terminal unit 221 is coupled to protrude into the electrical equipment compartment 400 through the circular through hole 240 formed in the side plate in the inner case 120 is connected to the electric wire. In addition, the electric heater 220 is configured to be rotated in a horizontal state or a predetermined angle to change the distance from the food. For this purpose, a predetermined angle in the through hole 240 at one end of the electric heater 220. A fixing device 230 capable of maintaining the rotated state is provided, and the support device 300 supporting the other end of the electric heater 220 is provided on the upper surface 121 of the inner case 120.

The support device 300 is composed of a bracket 320 to be inserted into the mounting hole 310 formed on the upper surface plate 121 of the inner case 120 and a leaf spring 330 to fix the same, see FIG. 4. If described in detail as follows.

First, a square-shaped mounting hole 310 is perforated in the upper surface plate 121 of the inner case 120 adjacent to the other end of the electric heater 220. Bracket 320 is composed of a steel plate extending to have a predetermined width and length, both ends are bent in a "U" shape to surround the electric heater 220. In addition, both ends thereof are lancing the protrusions 321 having a “V” shape so as to protrude in the inward direction so as to prevent the top play of the electric heater 220. At both ends of the bracket 320, the stepped 322 is provided to contact the inner surface of the inner case 120 and the upper plate 121 at the time of its coupling, and the guide grooves 323 recessed in the upper part of the stepped 322 are respectively provided. Formed.

The leaf spring 330 is coupled to and fixed to the end of the bracket 320 exposed to the outside of the inner case 120, and the center of the leaf spring 330 is bent at a predetermined curvature so as to have its own elastic force. To this end, on the center of the leaf spring 330, both ends of the bracket 320 are inserted into the insertion hole 331 and the insertion hole 332 which can be fitted into the guide groove 323 is extended to extend.

After inserting the other end of the electric heater 220 on the center of the bracket 320, and inserting the end into the mounting hole 310, the guide groove 323 is exposed to the outside and the step 322 is the inner case ( 120) the inner surface of the upper plate 121 is in contact. After inserting the leaf spring 330 using the insertion hole 331 to the end of the bracket 320 exposed to the outside, and pushes one side of the plate spring 330 to be fitted into the guide groove 323 by using the coupling hole 332. When (the arrow C direction of Figure 4) the leaf spring 330 is fixed to the inner case 120, the top plate 121 outside.

Therefore, the bracket 320 is firmly installed on the inner case 120 and the upper plate 121 to support the electric heater 220. In addition, the electric heater 220 is prevented from being separated due to the clearance in the upward direction by the protrusion 321, and the plate spring 330, which is bent at a predetermined curvature, is coupled with its own elastic force as it is. Keep it.

Next will be described the operation and effect of the convection microwave oven according to the present invention configured as described above.

First, for the cooking dish 210 of the cooking chamber 200 put a container containing the food or this. When the microwave oven is operated by operating a control unit (not shown) with the door (not shown) closed, a high frequency is radiated from the magnetron 410 to the cooking chamber 200, and the food irradiated with the high frequency is rapidly exposed to moisture. Cooked by heat of friction by molecular transformation. In addition, heat is emitted from the electric heater 220, and the heat cooks the food while circulating the cooking chamber 200. At this time, the cooking is made uniformly according to the rotation of the cooking plate 210.

On the other hand, since the electric heater 220 is supported on the upper part of the cooking chamber 200 by the fixing device 230 and the support device 300, the user according to the type of food before performing the cooking operation, the electric heater 220 Rotating horizontally or a predetermined angle can effectively cook by heat.

As described above, the bracket 320 of the support device 300 is made of a steel plate that is bent in a “U” shape to surround the electric heater 220, and thus, the manufacturing method of the support device 300 is easy, and also “V”. By the projection 321 protruding in the shape of the "gauge in the upper direction of the electric heater 220 is prevented and firmly supports it.

As described above in detail, the microwave oven according to the present invention is provided with a support device for supporting the electric heater to the inner case top plate constituting the cooking chamber, both ends are bent in a "U" shape to surround the electric heater It consists of a bracket fixed to the inner case top plate.

Therefore, the bracket is prevented from being released during the operation of the electric heater to improve its reliability, as well as to reduce the overall manufacturing cost.

Claims (3)

(Correction) The inner case 120 to form the cooking chamber 200, the outer case 110 is coupled to the inner case 120 and spaced apart a predetermined interval to form the electrical equipment compartment 400 partitioned with the cooking chamber 200 (110) One end is installed to protrude through the inner case 120 side plate to the electrical equipment compartment 400, the other end is located above the cooking chamber 200 to generate heat to cook the food 220 In the microwave oven having a support device 300, the end of which is coupled to the mounting hole 310 formed on the upper surface plate of the inner case 120 to support the other end of the electric heater 220, the support device Both ends 300 are bent at both ends to surround the electric heater 220, and are provided to correspond to both sides of the bracket 320 and a plate-shaped bracket 320 that is fitted and coupled to the installation hole 310. The tip end is inward to prevent the vertical play of the heater 220. Heater support device of the microwave oven comprising the projecting protrusion (321). (Correction) The concave guide grooves 323 are formed in both ends of the bracket 320 which penetrates through the installation hole 310 and is exposed to the outside of the inner case 120. The heater support device of the microwave oven, characterized in that it comprises a leaf spring 330 is coupled to the guide groove 323 on the outside of the inner case 120 to fix the bracket (320). (delete).