JPH07218095A - Heat dissipation structure of cool box - Google Patents

Abstract

(57) [Summary] [Purpose] The objective is to improve the cooling performance of the heat dissipation part. [Structure] A blower fan is a cross flow fan 24, and the cross flow fan 24 is installed close to the radiation fins 23 and axially supports the fins parallel to the fin direction.
A heat dissipation structure for a cool box, wherein a discharge port 29 of the fan casing 28 is formed to extend so as to cover the entire surface of the heat dissipation fin 23.

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 disclosed in Japanese Patent No. 112976 is known. This has a heat-radiating fin disposed on the heat-radiating surface of the thermoelectric conversion element in a heat conductive manner, and a blower fan facing the heat-radiating fin and adjacent to the heat-radiating fin and driven by a motor. Cooling air is blown to the radiation fins.

[0003]

In the above-mentioned technique, as shown in FIG. 6, the blower fan 101 is arranged so as to face the heat radiation fin 100, and the blower fan 101 is provided.
The output shaft of the motor is supported at the center of. Cooling air is not blown to the support portion 102 of the output shaft, so that it is not possible to obtain sufficient cooling air to the portion of the radiation fin corresponding to the support portion 102.

FIG. 7 shows a radiation fin (hatched portion) 103 to which cooling air is not blown. Since this hatched portion is generated, the heat radiation efficiency of the heat radiation fin is reduced, and the heat exchange in the cooling unit is also reduced. Therefore, the cooling performance of the thermoelectric conversion element cannot be sufficiently exhibited.

An object of the present invention is to improve the cooling performance of the heat radiation part.

[0006]

Means for Solving the Problems In order to solve the above-mentioned problems, the means taken in the invention of claim 1 is to provide a housing, a cool box arranged in the housing, and between the housing and the cool box. A duct formed in communication with the outside air, and a thermoelectric conversion element having a cooling surface in heat transfer contact with the inside of the cool box and a radiating surface in heat transfer contact with the duct are formed in parallel in one direction and inside the duct. Radiating fins that are disposed in the heat transfer surface and are in thermal contact with the radiating surface, a blower fan that is disposed so as to face the radiating fins, and a fan that is provided with an intake port and a discharge port and is disposed around the blower fan. In the heat dissipation structure of the cool box having a casing, the blower fan is a cross flow fan, and the cross flow fan is installed close to the heat radiation fins and is axially supported parallel to the fin direction. It is that the outlet is formed extending to cover the radiation fin entire.

[0007]

According to the above-mentioned invention, the cooling fan is evenly blown to the radiation fins by disposing the blowing fan close to the radiation fins and using the cross flow fan axially supported parallel to the fin direction. Further, since the discharge port of the fan casing arranged around the cross flow fan is formed so as to cover the entire surface of the radiation fin, the cooling air can be effectively blown to the entire surface of the radiation fin. The cooling performance of the heat dissipation part can be improved. From this, the heat exchange performed by the radiation fins can be effectively performed.

[0008]

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

FIG. 1 is a sectional view showing the heat dissipation structure of the cool box 10. FIG. 2 shows a front view of the cool box 10. The cool box 10 includes a box-shaped heat insulating wall 11 having an opening at the front, a heat insulating door 12 that opens and closes the opening, a heat insulating space 13 formed by the box heat insulating wall 11 and the heat insulating door 12, and a heat insulating space 13.
And a cooling part in heat transfer contact with each other, and an atmosphere and a heat dissipation part in heat transfer contact with each other, and a storage case 15 fixed to the heat insulating door 12. The cool box 10 is arranged in a housing 16, and the housing 16 is provided with a duct 17 extending downward from above the cool box 10. The duct 17 has a U-shaped cross section, the lower end of the duct 17 opens as an intake port 18 on the lower front surface of the cool box 10, and the upper end of the duct 17 serves as an exhaust port 19 on the upper front surface of the cool box 10. It is open.

The heat insulating door 12 has a wooden frame 12a and a heat insulating material 12.
b is provided, and the storage case 15 has a heat insulating material 12b.
Is stuck to. In addition, the rail member 20 is the wooden frame 12
It is fixed below a. A roller 20a is rotatably supported on the rail member 20. The box-shaped heat insulating wall 11 has a box-shaped wooden frame 11a provided with a heat-insulating wall 11b, and a vertical surface 11c of the box-shaped heat-insulating wall 11 provided with a heat absorbing plate 22. The cooling surface of the thermoelectric conversion element 14 is in thermal contact with the heat absorbing plate 22 to form a cooling portion. The heat radiation fins 23 are arranged on the heat radiation surface of the thermoelectric conversion element 14, and a heat radiation portion is formed. The radiating fins 23 are in heat transfer contact with the air in the duct 17.

As shown in FIG. 3, a cross-flow fan (blower fan) arranged so as to face the radiation fins 23.
24 is held by a holding member 25 extending from the rear end of the housing 16. A drive unit 26 that drives the crossflow fan 24 is disposed below the crossflow fan 24. It is preferable that the cross flow fan 24 has the same length as the heat radiation fin 23.

FIG. 4 shows a Y cross section of FIG. Figure 5
It is the rear view seen from the arrow X direction of FIG. As shown in FIG. 4, the center of the cross flow fan 24 is moved to the right in the figure. This is because the crossflow fan 24 can efficiently take in the air to be sucked in by sufficiently securing the suction space 27. A fan casing 28 is arranged around the cross flow fan 24. The discharge port 29 formed in the fan casing 28 extends so as to cover the entire circumference of the radiating fin 23, and the suction port 30 has an opening formed on the left side in the drawing. Further, the positional relationship between the discharge port 29 and the suction port 30 is such that the suction port 30 is located at a position that is approximately 90 degrees with respect to the discharge port 29.
Are preferably formed.

The operation of the present embodiment will be described below.

The cool box 10 is operated by an operation switch (not shown).
When the switch for supporting the start of cooling is turned on, the thermoelectric conversion element 14 is energized and the drive unit 26 is energized at the same time. When the thermoelectric conversion element 14 is energized, cooling is started on the cooling surface and heat is exchanged with the heat absorbing plate 22.
Is cooled. Since the heat absorbing plate 22 further exchanges heat with the air in the heat insulating space 13, the air in the heat insulating space 13 is cooled.

The heat generated by the heat radiation surface exchanges heat with the heat radiation fins 23, and the heat radiation fins 23 exchange heat with the air in the duct 17. On the facing surface of the radiation fin 23,
The crossflow fan 24 operated by the drive unit 26 is rotating, air is sucked in through the intake port 18, and the duct 1
It is supplied to the cross flow fan 24 through the suction port 30 through the nozzle 7. The cross flow fan 24 increases the flow velocity of the air, and the cooling air is blown from the discharge port 29 over the entire surface of the radiation fin 23. The air that has exchanged heat with the radiation fins 23 is discharged from the exhaust port 19 through the duct 17 formed above. Therefore, the heat radiation fins 23 efficiently exchange heat by this air flow.

As described above, the crossflow fan 24 blows the cooling air over the entire surface of the radiation fins 23 to improve the cooling performance of the radiation fins 23, so that the heat exchange of the thermoelectric conversion element 14 can be effectively performed. it can.

[0017]

According to the above-mentioned invention, the cooling fan is evenly blown to the heat radiation fins by providing the air blower fan close to the heat radiation fins and using the cross flow fan axially supported parallel to the fin direction. Further, since the discharge port of the fan casing arranged around the cross flow fan is formed so as to cover the entire surface of the radiation fin, the cooling air can be effectively blown to the entire surface of the radiation fin. The cooling performance of the heat dissipation part can be improved.
From this, the heat exchange performed by the radiation fins can be effectively performed.

[Brief description of drawings]

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

FIG. 2 shows a sectional view of a cool box according to an embodiment of the present invention.

FIG. 3 shows a detailed view of a heat dissipation structure of a cool box according to an embodiment of the present invention.

4 is a cross-sectional view taken along the line Y of FIG.

FIG. 5 is a rear view from the X direction of FIG.

FIG. 6 shows a positional relationship of a blower fan with respect to a conventional radiation fin.

FIG. 7 shows a blowing range of cooling air with respect to a conventional radiation fin.

[Explanation of symbols]

 10 ... Cooling box 14 ... Thermoelectric conversion element 16 ... Housing 17 ... Duct 23 ... Radiating fin 24 ... Cross flow fan (blower fan) 28 ... Fan casing 29 ... Discharge port 30 ... Suction port

Claims (1)

[Claims] 1. A housing, a cool box arranged in the housing, a duct formed between the housing and the cool box and having both ends communicating with outside air, and a cooling surface inside the cool box. A thermoelectric conversion element that is in heat transfer contact and has a heat transfer surface in heat transfer contact with the duct is formed in parallel in one direction and is disposed in the duct and is in heat transfer contact with the heat transfer surface. In a heat dissipation structure of a cool box having a heat dissipation fin, a blower fan arranged to face the heat dissipation fin, and a fan casing formed around the blower fan with an intake port and a discharge port formed, The blower fan is a cross flow fan, and the cross flow fan is installed close to the heat radiation fins and is axially supported parallel to the fin direction, and the discharge port of the fan casing is the heat radiation fan. A heat-dissipating structure for a cool box, which is formed to extend so as to cover the entire surface of the inn.