JPH07243747A - Heat dissipating structure for cold storage box - Google Patents

Abstract

PURPOSE:To improve cooling performance of a thermoelectric converter by expediting heat dissipating performance of a heat dissipating surface. CONSTITUTION:A heat dissipating structure for a cold storage box comprises a cooling water passage 30 for sealing cooling water flowing in a heat dissipating fin 18 to derive heat of the fin 18, and a heat exchanger 31 disposed in the passage 30 to derive heat of the cooling water, wherein the exchanger 31 is disposed at an exhaust side 14b of a duct.

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, Japanese Patent Laid-Open No.
The one described in Japanese Patent No. 295316 is known. This is a heat insulating wall that forms a cold insulation space, and a thermoelectric conversion element that is disposed on a side surface of the heat insulating wall and has a cooling surface that is in heat transfer contact with the cold storage space and a heat dissipation surface is in heat transfer contact with outside air. , And a blower fan arranged so as to face the heat dissipation surface. This cool box cools the heat radiation surface with cooling air blown by a blower fan.

[0003]

In order to improve the cooling effect of the thermoelectric conversion element, it is possible to improve the heat dissipation performance by increasing the heat dissipation surface area on the heat dissipation surface and improve the cooling performance on the cooling surface. .

In the above-mentioned prior art, the heat radiation surface is cooled by the cooling air from the blower fan. However, in order to enlarge the blower fan and the heat radiation fin, the size of the duct limits the size of the heat radiation surface. Can't get

Further, in the heat dissipation structure disclosed in Japanese Utility Model Publication No. 61-1144, the heat dissipation of the thermoelectric conversion element is performed on a heat dissipation plate formed of a good heat transfer material, which is disposed on the side surface of the heat insulating wall forming the cold insulation space. The heat dissipation surface and the heat dissipation plate are in heat transfer contact with each other so that the heat of the surface is transferred. As a result, the heat dissipation surface area is expanded and the heat dissipation performance is improved, but the heat dissipation plate is cooled by natural heat exchange between the heat dissipation plate and the outside air, so that the heat dissipation performance can be effectively improved. Can not.

The present invention promotes the heat dissipation performance of the heat dissipation surface,
An object is to improve the cooling performance of a thermoelectric conversion element.

[0007]

Means for Solving the Problems In order to solve the above-mentioned problems, the measures taken in the invention of claim 1 are as follows. A heat insulating wall forming a cold insulation space, and both ends which are arranged around the heat insulating wall and communicate with the outside air. A frame wall that forms a duct, a partition plate that divides the duct into an intake side and an exhaust side, and a cooling surface that is disposed on the heat insulating wall and is in heat transfer contact with the cooling space through the heat absorbing plate and the heat radiating surface. A thermoelectric conversion element that is in heat transfer contact with the inside of the duct through the radiation fins, and a first blower fan that faces the radiation fins and that is disposed on the partition plate and that connects the intake side and the exhaust side of the duct. In a heat dissipation structure of a cool box having a cooling water passage that encloses cooling water that flows in the heat dissipation fin to remove heat of the heat dissipation fin, and a heat exchanger that is disposed in the cooling water passage to remove heat of the cooling water. And the heat exchanger was located on the exhaust side of the duct.

The means taken in the invention of claim 2 is to have a second blower fan which is arranged so as to face the heat exchanger.

The means taken in the third aspect of the invention has a second heat exchanger in which a part of the cooling water passage is disposed on the intake side of the duct and is in heat transfer contact with a part of the cooling water passage. That is.

[0010]

According to the heat radiating structure of the cool box of the first aspect, the cooling water flowing through the cooling water passage exchanges heat with the radiating fins to remove heat from the radiating fins. As a result, the heat radiation fins have improved heat radiation performance due to heat exchange by the cooling water and heat exchange with the cooling air by the first blower fan, so that the cooling performance of the thermoelectric conversion element is improved.

According to the heat dissipating structure of the cool box of the second aspect, by the second blower fan arranged so as to face the heat exchanger,
Since the heat exchange of the cooling water in the heat exchanger is further promoted, the flow rate of the cooling water circulating in the cooling water passage is increased,
The heat radiation fins can be effectively cooled.

According to the heat dissipating structure of the cool box of claim 3, the cooling water flowing in the second heat exchanger arranged on the intake side is exposed to the outside air by the air flow in the duct due to the intake action of the first blower fan. Since heat exchange is performed with the heat radiation fins in a cooled state, the heat radiation fins can be effectively cooled.

[0013]

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

FIG. 1 shows a heat radiation structure of a cool box. The cool box 10 is a box-shaped heat insulating wall 1 having an opening on the front side.
1, a heat insulating door 12 that opens and closes an opening, and a box-shaped heat insulating wall 11
A heat insulating space 13 formed by a heat insulating door 12, a frame wall 15 that forms a duct 14 that is arranged around the box-shaped heat insulating wall 11 and has both ends communicating with the outside air, air in the cold insulating space 13, and heat transfer Heat absorbing plate 16 disposed on the peripheral wall of the box-shaped heat insulating wall 11 while being in contact with each other, and the heat transfer block 1 to the heat absorbing plate 16.
7, the cooling surface is in heat transfer contact, and the outside air in the duct 14 is in contact with the heat dissipation surface via heat dissipation fins 18, and the duct 14 is connected to the intake side 14a.
And a partition plate 20 which is divided into the exhaust side 14b, and a first blower fan 21 which is disposed on the partition plate 20 so as to face the heat radiation fins 18 and communicates the intake side 14a and the exhaust side 14b of the duct 14. ing. Further, the lower end of the duct 14 is opened as an intake port 22 in the lower front surface of the box-shaped heat insulating wall 11, and the upper end is opened as an exhaust port 23 in the upper front surface of the box-shaped heat insulating wall 11.

The box-shaped heat insulating wall 11 has a frame (wooden) 11b arranged around a box-shaped heat insulating material 11a.

The heat insulating door 12 includes a heat insulating material 12a, a movable side rail member 25, a storage case 26, and a frame wall (wooden) 12
b, and forms a lead portion.
A heat insulating material 12a is sandwiched between the frame wall 12b and the storage case 2
6 is fixed, and a heat insulating door 12 is formed. The movable side rail member 25 is fixed to the lower end of the frame wall 12b with a screw 27. A roller 25a is rotatably supported at an end portion (right side in the drawing) of the movable rail member 25. The fixed-side rail member 28 is disposed below the box-shaped heat insulating wall 11, and a roller (not shown) is rotatably provided at an end portion (left side in the drawing) of the fixed-side rail member 28. It is supported. The movable-side rail member 25 is slidable in the left-right direction on the fixed-side rail member 28 via the respective rollers, as shown in the drawing, so that the storage case 26 can be taken in and out of the cold storage space 13. In addition, a packing 29 accommodating a permanent magnet is arranged on the outer peripheral surface of the heat insulating door 12, and the cold insulation space 1 is provided by the attracting action of the permanent magnet.
The airtightness inside 3 is maintained. Further, the rail member is arranged outside the cool space 13 in order to prevent cooling loss due to the rail member in the cool space 13.

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

As shown in FIG. 2, a cooling water passage 30 is provided in the radiation fin 18, and the radiation fin 18 has a wave shape. The upper side of the cooling water passage 30 is arranged on the exhaust side 14b, and the lower side is arranged on the intake side 14a. As shown in FIG. 3, the cooling water passage 30 disposed on the exhaust side 14b has a corrugated cooling water passage 3 therein.
0, which forms the first heat exchanger 31. A second heat exchanger 33 having the same shape as the first heat exchanger 31 described above is formed in the cooling water passage 30 arranged on the intake side 14a. Further, in the first heat exchanger 31 and the second heat exchanger 33, a certain gap is formed between the passages so that the air flow in the duct 14 can be efficiently ventilated.

Next, the operation of this embodiment will be described.

From the operation switch section (not shown), the cool box 10
When the switch for instructing the start of cooling is turned on, the thermoelectric conversion element 19 is energized and at the same time the motor is energized.

When the thermoelectric conversion element 19 is energized, the cooling surface starts cooling and exchanges heat with the heat absorbing plate 16, so that the heat absorbing plate 16 is cooled. The heat absorbing plate 16 is further provided in the cold storage space 1
Since heat is exchanged with the air in the cool box 3, the air in the cool box 10 is cooled.

Further, the heat generated by the heat radiating surface exchanges heat with the heat radiating fin 18, and the heat radiating fin 18 is connected to the duct 14
Heat exchange with the air inside. In the duct 14, the outside air is sucked from the intake port 22 by the first blower fan 21, 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 radiating fins 18 passes through the exhaust side 14b of the duct 14 and is discharged from the exhaust port 23. The radiating fins 18 exchange heat with this air flow.

Further, the cooling water passage 30 arranged in the radiation fin 18 allows the radiation fin 18 to exchange heat with the cooling water. The cooling water that has exchanged heat with the radiation fins 18 is warmed, rises in the cooling water passage 30 and flows into the first heat exchanger 31. In the first heat exchanger 31, heat exchange is performed by the air flow of the second blower fan 32 and the exhaust side 14b, and the cooling water is cooled and flows downward. Further, in the cooling water passage 30 arranged on the intake side 14a of the duct 14,
The second heat exchanger 33 is provided, and the cooling water flows into the second heat exchanger 33. In the second heat exchanger 33, heat is exchanged by the air flow generated by the intake action of the first blower fan 21, so that the cooling water is further cooled and circulates in the cooling water passage 30. Radiation fin 1
The heat exchange of 8 is performed by the circulation of the cooling water.

As described above, in the heat dissipation structure of the cool box used in this embodiment, the first heat exchanger 31, the second heat exchanger 33, and the second heat exchanger 31 which constitute the heat dissipation structure of the heat dissipation fins 18 are used.
By having the blower fan 32, the heat dissipation performance on the heat dissipation surface is improved, and accordingly, the cooling performance on the cooling surface is also improved. As a result, since the inside of the cold storage space 13 is efficiently cooled, it is possible to provide a clean space in which bacteria and the like are unlikely to propagate, and the cold storage space 13 stores cosmetics such as lotions and milk lotions that are preferably stored at low temperatures. can do.

Further, in this embodiment, the first heat exchanger 31 and
Although the heat dissipation performance is improved by using the second heat exchanger 33 and the second blower fan 32, in addition to this, the method of using the first heat exchanger 31, the first heat exchanger 31 and the second heat exchanger 31 are used. There are a method of using the two blower fans 32, a method of using the first heat exchanger 31 and the second heat exchanger 33, and the like. In this case as well, the heat radiation performance can be improved.

[0026]

According to the heat radiating structure of the cool box of the first aspect, the cooling water flowing through the cooling water passage can exchange heat with the radiating fins to remove the heat of the radiating fins. Since the heat is exchanged with the air flow on the exhaust side, the cooling water is cooled and flows again to the radiating fins and circulates in the cooling water passage. Thus, the radiating fins are
Due to the heat exchange and the heat exchange with the cooling air by the first blower fan, the heat radiation performance is improved and the cooling performance of the thermoelectric conversion element can be improved.

According to the heat dissipating structure of the cool box of the second aspect, the second blower fan arranged to face the heat exchanger allows
Since the heat exchange of the cooling water in the heat exchanger is further promoted, the flow rate of the cooling water circulating in the cooling water passage is increased,
The heat radiation fins can be effectively cooled.

According to the heat dissipating structure of the cool box of claim 3, the cooling water flowing in the second heat exchanger arranged on the intake side is exposed to the outside air by the air flow in the duct due to the intake action of the first blower fan. Since heat exchange is performed with the heat radiation fins in a cooled state, the heat radiation fins can be effectively cooled.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a cool box according to an embodiment of the present invention.

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

FIG. 3 is a detailed view of a B part in 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 14a ... Intake side 14b ... Exhaust side 15 ... Frame Wall 16 ... Heat absorbing plate 18 ... Radiating fin 19 ... Thermoelectric conversion element 20 ... Partition plate 21 ... First blower fan 30 ... Cooling water passage 31 ... First heat exchanger 32 ... 2nd ventilation fan 33 ... 2nd heat exchanger

Claims (3)

[Claims] 1. A heat insulating wall which forms a cold insulation space, a frame wall which is arranged around the heat insulating wall and forms a duct whose both ends communicate with outside air, and a partition plate which divides the duct into an intake side and an exhaust side. And a cooling surface provided on the heat insulating wall, a cooling surface being in heat transfer contact with the inside of the cold insulation space via a heat absorbing plate, and a radiating surface being in heat transfer contact with the inside of the duct via radiating fins. In a heat dissipation structure of a cool box having an element and a first blower fan that faces the heat dissipation fin and is disposed on the partition plate and blows air from the intake side to the exhaust side of the duct, the heat dissipation structure flows in the heat dissipation fin. A cooling water passage enclosing cooling water that removes heat from the radiation fins; and a heat exchanger that is disposed in the cooling water passage and removes heat from the cooling water. The heat exchanger has exhaust air from the duct. A heat dissipation structure for a cool box characterized by being located on the side. 2. A second device arranged to face the heat exchanger.
The heat dissipating structure for a cool box according to claim 1, further comprising a blower fan. 3. A second heat exchanger, wherein a part of the cooling water passage is disposed on an intake side of the duct, and the second heat exchanger is in heat transfer contact with a part of the cooling water passage. Item 3. A heat dissipation structure for a cool box according to item 1 or 2.