JPH07234053A - Electronic heat insulating chamber - Google Patents

Abstract

PURPOSE:To secure a heat dissipating area of a heat dissipating surface in a narrow duct sufficiently and improve heat dissipating performance by a method wherein a partitioning plate is formed of a heat conductive material and a heat transfer plate, contacting the heat conductive member with the partitioning plate theremally, is provided. CONSTITUTION:A heat absorbing plate 16 is contacted thermally with air in a heat insulating space 13 and is arranged on the vertical surface of a box type heat insulating wall while the cooling surface of a thermoelectric converting element 19 is contacted thermally with the heat absorbing plate 16 and the heat dissipating surface of the heat absorbing plate 16 is contacted thermally with outside air in a duct 14 through a heat conductive member 31 and heat dissipating fins 18. A partitioning plate 20 divides the duct 14 into a suction side and a discharging side while a ventilating fan 21 is arranged on the partitioning plate 20 so as to be opposed to the heat dissipating fins 18 and communicates the suction side of the duct 14 with the discharging side of the same. One end of a heat transfer plate 32 is fixed thermally to both side ends of the heat transfer member 31 through brazing while the other end of the heat transfer plate 32 is clamped thermally to the partitioning plate 20, formed of a heat conductive material, through screw rivets 33.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat dissipating structure for a cool box using a thermoelectric conversion element.

[0002]

2. Description of the Related Art As a conventional technique of this kind, there is an actual utility model sho 61.
The one described in JP-A-10144 is known. This is because the heat radiating surface and the heat radiating plate are transferred so that the heat of the heat radiating surface of the thermoelectric conversion element is transferred to the heat radiating plate which is arranged on the side surface of the heat insulating wall that forms the cold insulation space and is formed of a good heat transfer material. It is made to contact thermally. As a result, the heat dissipation surface area is expanded and the heat dissipation performance is improved.

[0003]

In the thermoelectric conversion element, the cooling performance can be improved by improving the heat radiation performance of the heat radiation surface. Further, it is possible to secure a sufficient heat radiation surface area to improve the heat radiation performance, but it is not possible to secure a sufficient heat radiation surface area for a blower fan arranged in a duct having a small width. In addition, in the above-mentioned conventional technology, in order to secure a surface area for radiating heat, a heat radiating plate which is disposed in close contact with the heat insulating wall and is made of a good heat transfer material is used, and the heat of the heat radiating surface is transferred to this heat radiating plate. Then, the heat is radiated by the heat radiating surface and the heat radiating plate. However, the heat radiating plate and the outside air cannot radiate heat effectively because they radiate heat by natural heat exchange.

An object of the present invention is to secure a sufficient heat dissipation surface area of a heat dissipation surface in a narrow duct and improve heat dissipation performance.

[0005]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the measures taken in the invention according to claim 1 are: a heat insulating wall forming a cold insulation space; A thermoelectric conversion element in which a cooling surface is in heat transfer contact with the frame wall forming a duct that communicates with the outside air in the cold insulation space and a heat dissipation surface is in heat transfer contact with the outside air via the heat conducting member and the heat dissipation fins. In an electronic cool box having a partition plate that divides the duct into an intake side and an exhaust side, and a blower fan that is disposed on the partition plate so as to face the heat radiation fins and blows air from the intake side to the exhaust side. The plate is made of a good heat transfer material, and
That is, a heat transfer plate is provided to bring the heat transfer member and the partition plate into heat contact with each other.

The means taken in the second aspect of the invention is that the heat transfer plate is formed so as to be elastically connected between the heat conducting member and the partition plate.

[0007]

According to the electronic refrigerator of the first aspect, both end faces of the partition plate, which is in contact with the heat conducting member through the heat transfer plate and is made of a good heat transfer material, are thermally conductive to the air flow of the duct. In addition to the heat dissipation effect of the heat dissipation fins,
A heat radiation effect by the partition plate is added, and the cooling performance of the thermoelectric conversion element can be improved. From this, it is possible to secure a sufficient heat dissipation surface area even in a narrow duct,
A heat dissipation effect can be effectively performed.

According to the electronic cool box of claim 2, since the heat transfer plate is elastically connected between the heat conducting member and the partition plate, both of the positional deviations occurring in the electronic cool box occur. Also, it can be assembled without impairing the assembling property.

[0009]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view of the electronic cold storage box 10 in an open state. FIG. 2 is a sectional view taken along the line AA of FIG. 1 and is in a stored state. The electronic cold storage 10 is formed by a box-shaped heat insulating wall (heat insulating wall) 11 having an opening at the front, a heat insulating door (heat insulating wall) 12 that opens and closes the opening, a box-shaped heat insulating wall 11 and a heat insulating door 12. A cool space 13 and a duct 14 arranged around the box-shaped heat insulating wall 11 and having both ends communicating with outside air.
A wooden frame wall 15 that forms a heat absorption plate 16, a heat absorption plate 16 that is in heat transfer contact with the air in the cold insulation space 13 and is disposed on the vertical surface of the box-shaped heat insulation wall 11, and a heat transfer block to the heat absorption plate 16. 1
The duct 14 and the thermoelectric conversion element 19 in which the cooling surface is in heat transfer contact with each other via the heat transfer member 7 and the heat dissipation surface is in contact with the outside air in the duct 14 via the heat transfer member 31 and the heat dissipation fins 18. From the partition plate 20 that divides the intake side 14a and the exhaust side 14b, and the blower fan 21 that is disposed on the partition plate 20 facing the heat radiation fins 18 and that connects the intake side 14a and the exhaust side 14b of the duct 14 to each other. It is configured. In addition, the lower end of the duct 14 is provided on the front surface below the box-shaped heat insulating wall 11 with an intake port 22.
The upper end of the box-shaped heat insulating wall 11 is opened as an exhaust port 23.

The box-shaped heat insulating wall 11 includes a box-shaped heat insulating material 11a and a wooden frame 11b arranged around the heat insulating material 11.
A lining material 24 is provided on the inner surface of a. Liner 2
A heat absorbing plate 16 is disposed on the vertical surface of the No. 4 unit.

The heat insulating door 12 includes a heat insulating material 12a, a movable side rail member 25, a storage case 26, and a wooden frame 12b.
And forms a drawer. The frame 12b holds the heat insulating material 12a and holds the storage case 26.
Are fixed by screws 27, and the heat insulating door 12 is formed. The movable side rail member 25 is fixed to the lower end of the frame body 12b with a screw 28. Movable rail member 2
A roller 25a is rotatably supported at an end portion (right side in the drawing) of No. 5. The fixed-side rail member 29 is arranged below the box-shaped heat insulating wall 11, and a roller 29a is rotatably supported at an end portion (left side in the drawing) of the fixed-side rail member 29. . The movable-side rail member 25 is slidable in the front-rear direction on the fixed-side rail member 29 via the rollers 25a and 29a.
It can be put in and taken out freely in 3 (state of Fig. 1). Also, in order to prevent cooling loss due to the rail member, the rail member is
It is arranged outside the cold storage space 13. In addition, a packing 30 accommodating a permanent magnet is disposed on the outer peripheral surface of the heat insulating door 12, and the airtightness in the cold insulating space 13 is improved by the adsorbing action of the permanent magnet and the metallic liner 24. It is kept.
Further, although the frame wall 15 and the frame bodies 11b and 12b are made of wood, the present invention is not limited to this.

Next, the heat dissipation structure of the cool box, which is a feature of the present invention, will be described.

As shown at 112, the thermoelectric conversion element 1
One end of a heat transfer plate 32 is heat-transferred and fixed to both ends of a heat conductive member 31 arranged between the heat dissipation surface of the heat dissipation member 9 and the heat dissipation fin 18 (X portion in FIG. 2). ) Further, the other end of the heat transfer plate 32 is heat-transferred to the partition plate 20 formed of a good heat transfer material (aluminum or the like) by the screw rivet 33 (Y portion in FIG. 2). The method of stopping the heat transfer plate 32 is not particularly limited to this. The heat transfer plate 32 is made of a good heat transfer material (aluminum or the like), and can transfer the heat generated by the heat transfer member 31 to the partition plate 20. or,
The heat transfer plate 32 is formed in a wave shape having elasticity,
It is possible to cope with the positional deviation that occurs in the electronic cool box 10, and to reliably transfer heat.

Next, the operation of this embodiment will be described.

When a switch for instructing the start of cooling of the electronic cold storage 10 is turned on by an operation switch section (not shown), the thermoelectric conversion element 19 is energized and at the same time, the motor for driving the blower fan 21 is energized. The energization of the thermoelectric conversion element 19 starts cooling on the cooling surface, and heat is exchanged with the heat absorbing plate 16 via the heat transfer block 17.
6 is cooled. The heat absorbing plate 16 is further provided in the cold storage space 13
Since heat is exchanged with the air inside, the air inside the cold storage space 13 is cooled.

Further, the heat generated from the heat radiating surface exchanges heat with the air in the duct 14 from the heat radiating fins 18 via the heat conducting member 31. In the duct 14, the blower fan 21 sucks the outside air from the intake port 22, passes through the intake side 14a of the duct 14, and is blown to the radiating fins 18. The outside air that has exchanged heat with the radiation fins 18 passes through the exhaust side 14 b of the duct 14 and is exhausted from the exhaust port 23. The heat radiation of the heat radiation fins 18 is performed by this air flow. or,
Heat is also conducted from the heat conducting member 31 to the partition plate 20 via the heat transfer plate 32, and the partition plate 20 exchanges heat with the air in the duct 14. The lower partition plate 20a is a blower fan 2
1, heat exchange can be performed by the flow of the outside air sucked from the intake side, and the exhaust side 14 of the upper partition plate 20b.
On the side b, heat can be exchanged by the discharged air flow. Therefore, in addition to the radiation fins 19, the partition plate 2
Since the heat is radiated by 0, a sufficient heat radiation surface area can be secured.

As a result, the cooling performance of the thermoelectric conversion element 19 can be improved and the inside of the cold storage space 13 can be efficiently cooled, so that a clean space in which bacteria and the like are unlikely to propagate can be provided. Cosmetics such as lotion and milky lotion, which are preferably stored at low temperature, can be stored in the cold storage space 13.

[0019]

According to the electronic refrigerator of the first aspect, both end surfaces of the partition plate, which is in contact with the heat conducting member through the heat transfer plate and is made of a good heat transfer material, transmits the air flow of the duct. Since they can be brought into thermal contact with each other, the cooling performance of the thermoelectric conversion element can be improved by adding the heat radiation function of the partition plate in addition to the heat radiation function of the heat radiation fins. Therefore, a sufficient heat dissipation surface area can be secured even in a narrow duct, and heat dissipation can be effectively performed.

According to the electronic cool box of the second aspect, since the heat transfer plate is elastically connected between the heat conducting member and the partition plate, both of the positional deviations occurring in the electronic cool box occur. However, it can be assembled without impairing the assembling property.

[Brief description of drawings]

FIG. 1 is a sectional view of an electronic refrigerator according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

[Explanation of symbols]

 11 ... Box-shaped heat insulating wall (heat insulating wall) 12 ... Heat insulating door (heat insulating wall) 13 ... Cooling space 14 ... Duct 15 ... Frame wall 18 ... Radiating fin 19 ... Thermoelectric Conversion element 20 ... Partition plate 21 ... Blower fan 31 ... Heat conduction member 32 ... Heat transfer plate

Claims (2)

[Claims] 1. A heat insulating wall that forms a cold insulating space, a frame wall that is disposed around the heat insulating wall and has ducts whose both ends communicate with outside air, and a cooling surface that transfers a cooling surface to the cold insulating space. And a heat dissipation surface in which the heat dissipation surface is in heat transfer contact with the outside air through a heat conducting member and a heat dissipation fin, a partition plate for partitioning the duct into an intake side and an exhaust side, and a heat dissipation fin facing the heat dissipation fin. Then, in the electronic cool box having a blower fan that is disposed on the partition plate and blows air from the intake side to the exhaust side, the partition plate is formed of a good heat transfer material, and
An electronic cold storage, comprising a heat transfer plate for thermally contacting the heat conductive member and the partition plate. 2. The electronic cool box according to claim 1, wherein the heat transfer plate is formed so as to elastically connect between the heat conducting member and the partition plate.