KR20040040184A - Cooling apparatus for electrical cooker - Google Patents

Abstract

PURPOSE: A radiator for an electric rice pot is provided to make a wiring operation easy between a display unit and a power PCB(Printed Circuit Board) by arranging the power PCB to a rear portion of a main body and a cooling fan to a front portion. CONSTITUTION: A case(55) receives an oven(65) inside and forms an inlet port(56a) and an exhaust port on a floor surface. A power PCB(Printed Circuit Board,80) is arranged rear inside the case. A heat sink(83) is attached to a heating device(81) of the power PCB. A cooling fan(85) inhales air, installed toward the inlet portion of the case separate from a lower end of the heat sink in a specific distance horizontally. A support device supports the oven. Thereby, a wiring operation between a display unit(54) and the power PCB is easy by arranging the power PCB to a rear portion of a main body(51) and the cooling fan to a front portion with the display unit having a lid(52). Cooling efficiency of is improved by installing a radiator to a guide structure integrally.

Description

Heat dissipation device of electric rice cooker {COOLING APPARATUS FOR ELECTRICAL COOKER}

The present invention relates to an electric rice cooker, and more particularly, to a heat dissipation device of an electric rice cooker to improve the heat dissipation performance while reducing the overall height by changing the flow path structure inside the rice cooker.

In general, an electric rice cooker performs cooking using electricity as a heating source, and maintains the inside of the oven at a high pressure, thereby making the cooking process quicker by raising the heating temperature than at normal pressure.

Such an electric rice cooker is connected to the main body 1 in which the oven 4 is built, as shown in FIG. 1, by the hinge part 3 on the upper part of the main body 1, and rotates about the hinge part 3. It is comprised by the lid 2 which opens and closes the said main body 1. As shown in FIG.

The main body 1 is provided with an electric heating device 5 for heating the oven 4, the electric heating device 5 is a working coil (working coil) for generating an induction current when cooking, It consists of a heater which performs relatively weak exothermic action at the time of heat retention, an inner cylinder 5a into which the oven is inserted, and the like.

According to the electric rice cooker as described above, the cooking operation is performed by heating the oven 4 by the electric heating device 5, in the cooking process, the inner part of the lid 2 is in close contact with the upper end of the oven 4, steam Since the discharge valve is kept closed, when the rice boils, the pressure inside the oven 4 becomes higher than the normal air pressure due to steam generation.

In addition, as the pressure increases, the temperature of the rice also rises to a temperature higher than the boiling point (100 ° C.) at normal pressure, so the rice grains ripen quickly. When the cooking process is finished, the steaming process for maintaining the pressure in the oven 4 is maintained for a predetermined time while the heating by the electric heating device 5 is stopped, and after the steaming process is finished, By the operation, the steam inside the oven 4 is discharged to the outside, and the thermal insulation process is performed in which the oven 10 is weakly heated to a constant temperature by the electric heating device 5 while the pressure is lowered.

On the other hand, the front of the main body 1 is provided with a display window 6 for displaying the operation state of the rice cooker, the display PCB 10, the display panel and the like provided therein, and the display PCB 10 In the vicinity of is mounted a power PCB 11 for controlling the operation of the display PCB 10 and the electric heating device (5). Here, the power PCB 11 is provided with a heat generating element (11a) such as a semiconductor element that becomes a high temperature during operation, the heat sink 15 is attached to the heat generating element (11a) to cool it.

The bottom surface of the main body 1 is provided with a heat radiating fan 13 for protecting the power PCB 11 from the high temperature generated by the electric heating device 5.

Therefore, as the heat radiating fan 13 operates, air outside the main body flows into the main body 1 to cool the heat generating element 11a of the power PCB 11, and then circulates inside the main body 1. And then you go outside.

However, in the electric rice cooker of the prior art as described above, when the display portion is provided on the lid 2 side, since the power PCB 11 is provided on the front of the main body 1, the wire connecting the display PCB and the power PCB is Since the back of the main body 1 and the hinge portion 3 must be connected to the display PCB, the length of the wire becomes long, and the internal wiring work is not easy.

In particular, in order to sufficiently cool the heat generating element 11a which is a main heat generating source in the electric cooker, the heat dissipation area of the heat sink 15 should be increased, and the external air introduced through the heat dissipation fan 13 is also the heat sink 15. The heat dissipation fan 13 should be installed directly under the heat sink 15 in order to concentrate on the side of the heat sink. However, when the heat dissipation fan 13 is installed directly below the heat sink 15, the heat dissipation fan 13 should have a predetermined distance in the vertical direction between the heat dissipation fan 13 and the heat sink 15, Since there is a space, a problem arises in that the overall height of the rice cooker increases.

In addition, when the heat dissipation fan 13 is not installed directly under the heat sink 15, there is no special mechanism for concentrating external air flowing through the heat dissipation fan 13 toward the heat sink 15. There is also a problem that can not obtain a sufficient cooling efficiency for the heating source.

The present invention has been made in order to solve the above problems, in the condition that the display portion is provided on the lid to place the power PCB in the back of the main body, the heat dissipation fan is located in front of the power PCB to wire between the display portion and the power PCB It is an object of the present invention to provide a heat dissipation device for an electric rice cooker which can reduce the overall height of the main body while making the work easier.

In addition, the present invention, by forming a guide structure to intensively cool the heating element of the power PCB in a portion of the trivet supporting the oven, by providing a heat radiating fan integrally to the guide to improve the cooling efficiency of the heating source An object of the present invention is to provide a heat dissipation device for an electric rice cooker, in which the overall structure is simplified to facilitate the assembly and production of products.

1 is a longitudinal sectional view showing the internal structure of a conventional rice cooker,

2 is a longitudinal sectional view showing an electric rice cooker having a heat dissipation device according to the present invention;

3 is a bottom view showing the internal structure of the electric cooker according to the present invention,

4 is a plan view showing a bottom plate of the electric rice cooker according to the present invention,

5 is a perspective view showing a support device of the electric rice cooker according to the present invention.

<Explanation of symbols for the main parts of the drawings>

51: body 52: lid

53: hinge 54: display unit

55case 55a second outlet

56: bottom plate 56a: suction port

56b: first outlet 60: support cylinder

61: working coil 65: oven

68: horizontal support plate 68a: air passage hole

70: support 71, 72: support foot

73: guide foot 80: power PC

81: heat generating element 83: heat sink

85: heat dissipation fan

The heat dissipation device of the electric rice cooker according to the present invention for realizing the above object, the case is provided with an oven therein and the inlet and outlet respectively formed on the bottom surface; A power PCB located inside the rear of the case; A heat sink attached to the heat generating element of the power PCB; A heat dissipation fan provided on the inlet side of the case at a distance away from the lower end of the heat sink in a horizontal direction to suck outside air; It characterized in that it comprises a support means for supporting the oven provided in the case.

In addition, the heat dissipation device of the electric rice cooker according to the present invention for realizing the above object, the case and the inlet and outlet are formed on the bottom surface respectively; A power PCB located inside the rear of the case; A heat sink attached to the heat generating element of the power PCB; A heat dissipation fan provided inside the suction port of the case to suck outside air; And supporting means for guiding the air sucked through the heat dissipation fan in the heat sink direction while supporting the oven in the case.

In addition, the heat dissipation device of the electric rice cooker according to the present invention for realizing the above object is formed of a concave trivet structure so as to support the oven, one foot of the air flows by the heat radiating fan toward the side of the oven Characterized in that it comprises a support device formed of a guide structure to guide the concentration.

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

2 is a longitudinal sectional view showing an electric cooker having a heat dissipation device according to the present invention, Figure 3 is a bottom view showing the internal structure of the electric cooker according to the present invention.

In FIG. 2, reference numeral 51 is a main body provided with an oven 65 and an electric heating device therein, and 52 is connected to the main body 51 by a hinge 53 to open and close the oven 65 of the main body 51. It is a lid that can.

Here, the lid 52 is provided with a display unit 54 so that the user can easily check the state of the rice cooker and operate. This display unit 54 includes a display PC 54a.

The main body 51 is provided with a case 55 including a bottom plate 56 to form an exterior of the rice cooker, so that the outer plate is sucked out of the bottom plate 56 of the case 55 to be discharged. Inlet port 56a and first outlet port 56b are formed, respectively. In addition, a second outlet 55a is formed at the rear of the case 55 to allow the internal air to be discharged to the outside.

Here, referring to the top view of the bottom plate 56 shown in FIG. 4, the inlet port 56a is formed at a relatively rear portion of the bottom plate, and the first outlet port 56b is located at both sides of the front portion of the bottom plate. Is formed. Of course, the suction port 56a and the discharge port 56b preferably have a screen structure so that foreign matters and the like do not flow into the case 55.

The case 55 is provided with an electric heating device for heating the oven 65, the electric heating device is a working coil 61 for generating an induction current to heat the oven (65) And, the working coil 61 is installed on the outside and consists of a container-shaped support cylinder 60 into which the oven 65 is inserted.

A support device is provided to support the support cylinder 60 into which the oven 65 is inserted in the case 55. The supporting device is fixed to the horizontal support plate 68, which is installed between the circumference of the support cylinder 60 and the inner surface of the case 55, and fastening means such as screws to the horizontal support plate 68 to lower the lower portion of the support cylinder 60. It consists of a tri-shaped support body 70 for supporting.

The transverse support plate 68 has a plurality of air passage holes 68a such that air introduced through the suction port 56a passes through the upper space of the main body 51 and then is discharged to the outside through the discharge port 56b. Has

On the other hand, the inside of the case 55 is connected to the display PCB 54a and the working coil 61 and the like at the rear position of the support cylinder 60, the power PCB 80 to control the rice cooker vertically It is erected and fixed. Here, the power PCB 80 is provided with a heat generating element 81 for generating high heat during operation such as a semiconductor element, the heat sink 83 is provided in the heat generating element 81 to cool the heat generating element 81 Attached.

In addition, in order to cool the heat sink 83 in an air-cooled manner, a heat radiating fan 85 is provided inside the intake port 56a to forcibly suck outside air at a position separated by a distance in a horizontal direction from a lower end of the heat sink 83. ) Is provided. Here, the heat dissipation fan 85 is fixedly installed on the tri-shaped support body 70.

At this time, the heat dissipation fan 85 is located at the lower side of the support cylinder 60, the heat sink 83 is located at the rear side of the support cylinder 60.

Here, the support 70 will be described with reference to FIGS. 2 and 3 with reference to FIG. 5 as follows.

The support 70 is formed of a trivet structure consisting of a concave structure of three feet 71, 72, and 73 so as to support the support cylinder 60, and one of the feet 83 is the heat radiating fan. A guide foot 83 is formed to guide the air flowing by the 85 to the side of the support cylinder 60 to guide the air flowing in the direction of the heat sink 83.

That is, the support 70 is connected to two support feet 71 and 72 supporting the support cylinder 60 in the case 55 and the support feet 71 and 72 integrally with the support feet ( The guide foot 83 guides the air flowing through the heat dissipation fan 85 in the direction of the heat sink 83 while supporting the support cylinder 60 together with 71 and 72.

Flange portion 70a is formed at the end of each foot 71, 72, 73 of the support 70 such that it can be fixed to the transverse support plate 68 with a screw or the like.

The guide foot 73 extends upward along the support cylinder 60 from the fan mounting portion 73a and the fan mounting portion 73 so that the heat dissipation fan 85 may be integrally installed. It consists of a portion 73a. In addition, the width of the guide foot 73 is formed to be relatively wider than the width of the two support feet (71, 72).

Referring to the operation of the heat radiating device of the electric cooker according to the present invention configured as described above are as follows.

First, the heat dissipation fan 85 is integrally installed on the tri-moulded support 70, and one of the feet of the support 70 concentrates the air flowing by the heat dissipation fan 85 toward the heat sink 83. The guide foot 73 is formed to simplify the installation structure of the heat dissipation fan 85 and to concentrate the air toward the heat sink 83 without installing a separate air guide structure. 80) can increase the cooling efficiency.

In addition, the heat dissipation fan 85 is not installed directly under the power PCB 80 and the heat sink 83, and is installed in the lower side of the support cylinder 60, so that the overall height of the rice cooker is not increased. As a result, it is possible to secure an advantageous condition for sufficiently increasing the sizes of the power PCB 80 and the heat sink 83.

In the present invention as described above, when the heat radiating fan 85 is operated, air outside the main body 51 flows into the case 55 through the inlet port 56a of the bottom plate 56, as shown in FIG. do. The air introduced in this way passes through the heat radiating fan 85 and then flows toward the heat sink 83 and the power PCB 80 by the guide foot 73 of the support 70, thereby exchanging heat to the power PCB 80. ) And the heating element 81 are cooled.

Some of the air that has been cooled in this way is discharged to the outside through the second outlet (55a) behind the power PCB 80, the rest of the air through the air passage hole (68a) behind the rear support plate 68 of the main body ( 51 flows into the upper space, and then flows back to the lower space of the main body 51 through the front air passage hole 68a of the transverse support plate 68 and then to both lower portions of the rice cooker through the first outlet 56a. Discharged.

The heat dissipating device of the electric cooker according to the present invention configured and operated as described above is located in the rear of the main body of the power PCB under the condition that the display unit is provided on the lid, and the heat dissipation fan is located in front of the power PCB and the display unit and power The wiring work between the PCBs is facilitated, and the overall height of the main body is reduced.

In addition, the present invention, the guide structure is formed on the part of the tri-shaped support for supporting the oven to intensively cool the heat generating element of the power PCB, and since the heat dissipation is integrally provided in the guide, cooling efficiency of the heat generating source is improved. While improving, the overall structure is simplified to provide the advantage of facilitating the assembly production of the product.

Claims (16)

A case in which an oven is accommodated and an inlet and an outlet are respectively formed at the bottom thereof; A power PCB located inside the rear of the case; A heat sink attached to the heat generating element of the power PCB; A heat dissipation fan provided on the inlet side of the case at a distance away from the lower end of the heat sink in a horizontal direction to suck outside air; And a support means for supporting an oven provided in the case. A case in which an inlet and an outlet are respectively formed on the bottom surface; A power PCB located inside the rear of the case; A heat sink attached to the heat generating element of the power PCB; A heat dissipation fan provided inside the suction port of the case to suck outside air; And support means for guiding the air sucked through the heat dissipation fan in the heat sink direction while supporting the oven in the case. The method according to claim 1 or 2, Heat dissipation device of an electric rice cooker characterized in that the discharge port is formed on the rear surface of the case. The method according to claim 1 or 2, In the case, the suction port is formed in the rear portion of the bottom surface, the heat dissipation device of the electric cooker, characterized in that the discharge port is formed in the front portion. The method of claim 4, wherein The discharge port is a heat radiating device of the electric cooker, characterized in that formed on both sides of the bottom surface of the case. The method according to claim 1 or 2, The support means is a heat dissipation device of an electric rice cooker comprising a support for supporting the oven in the case, and a guide part which extends integrally from the support to guide the air flowing through the heat dissipation fan in the heat sink direction. The method of claim 6, The support unit is formed of a trivet structure, one of the heat radiating device of the electric rice cooker, characterized in that forming the guide portion. The method of claim 6, The heat radiating device of the electric cooker, characterized in that the heat radiating fan is fixed to the guide portion. The method according to claim 1 or 2, The inner side of the case is a heat radiating device of the electric cooker, characterized in that the horizontal support plate having a plurality of air passage holes provided. The method of claim 9, The support means is a heat dissipation device of an electric rice cooker, characterized in that the fastening means is fixed to the horizontal support plate. The method according to claim 1 or 2, The inner side of the case is provided with a horizontal support plate having a plurality of air passage holes, The support means is composed of a support portion for supporting the oven in the case, and a guide portion extending from the support portion integrally to guide the air flowing through the heat radiating fan in the heat sink direction, The air sucked through the suction port has an air flow structure through which the heat dissipation fan, the guide portion, the heat sink, the rear air passage hole of the transverse support plate, the front air passage hole of the transverse support plate is discharged through the outlet of the case. Radiator of electric rice cooker. The method according to claim 1 or 2, The heat dissipation fan is located on the lower side of the oven, the heat sink is a heat dissipation device of the electric cooker, characterized in that located behind the oven. An electric rice cooker comprising a support structure formed of a concave trivet structure to support the oven and one of which includes a guide structure configured to guide and guide the air flowing by the heat radiating fan toward the side of the oven. Heat dissipation device. The method of claim 13, Heat dissipation device of the electric cooker, characterized in that the flange portion is formed at the end of the trivet to be fixed to the inner structure of the rice cooker. The method of claim 13, The guide is a heat dissipation device of the electric cooker, characterized in that the heat dissipation fan is integrally installed. The method according to any one of claims 13 to 15, The guide is a heat dissipation device of the electric cooker, characterized in that the width is formed relatively wider than the width of the other foot that does not form the guide.