JPH1030856A - Cooling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the application of pressure to a Peltier element even when a cooling device is subjected to vibration from outside by maintaining a space regulating mean which is projected toward a cooling plate from the opposed space of a heat radiation plate and maintains the spacing between the cooling plate and the heat radiation plate. SOLUTION: A threaded hole 13 is bored in a base plate of a heat radiation plate 4 where a screw 11 is screwed into this threaded hole 13 from a heat radiating fin side, thereby projecting a threaded section 14 of the screw 11 toward an opposed surface 2a of a cooling plate 2 from an opposed surface 4a of the heat radiation plate 4. The tip of the projecting threaded section 14 of the screw 11 comes in contact with the opposed surface 2a of the cooling plate 2 by way of an insulating material 15, thereby regulating the movement of the cooling plate 2 so that the cooling plate may not move in the direction which narrows the space between the opposed surface 2a and the opposed surface 4a. This construction makes it possible to prevent the application of a pressure to a Peltier element 3 even when a cooling device is subjected to vibration and hence protect the Peltier element 3 from being damaged and broken down.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device using a Peltier device.

[0002]

Conventionally, in a cooling device used for a simple cold storage container such as a vehicle-mounted cooler box, a Peltier element that generates an endothermic effect by receiving a required power supply is used to cool it. Some are interposed between the plate and the heat dissipation plate. 3 and 4 show an example thereof. As shown, the cooling device 1
Is a plate-shaped cooling plate 2 made of a material having high heat transfer efficiency such as a metal material, and the plate-shaped Peltier element 3
And a radiating plate 4 made of a material having good heat transfer efficiency as a shape having a plurality of fins (radiating plates) and a high radiating efficiency.
And the smooth opposing surfaces 2a, 4a of the cooling plate 2 and the heat radiating plate 4 face in parallel, the Peltier element 3 is interposed therebetween, and the Peltier element The cooling plate 2 is screwed to the heat radiating plate 4 at a position where the Peltier element 3 is not interposed.

As shown in the drawing, in each of a plurality of screwed portions 5 of the cooling plate 2 and the heat radiating plate 4 in the cooling device 1, a step portion for receiving a screw head is formed in the hole on the cooling plate 2 side. A stepped screw insertion hole 6 is opened, and a screw 8 is inserted through a screw seat 7 made of a heat insulating material for preventing heat conduction. The screw 8 is screwed into a screw hole 9 provided in the hole.

However, in a device assembled with a Peltier element sandwiched therebetween, there is no member for regulating the interval between the cooling plate and the heat radiation plate, and the structure is such that the interval is held by the Peltier element itself. When vibration is applied to the cooling device from the outside by using this cooling device for in-vehicle use, an external force may act in the direction in which the cooling plate vibrates and presses the Peltier element, thereby destroying the Peltier element. There was a problem that would.

In view of the above circumstances, the present invention provides a cooling device assembled by sandwiching a Peltier element between a cooling plate and a heat radiating plate. The problem is to be able to be maintained at intervals, so that even if vibration or the like is applied from the outside to the cooling device, the pressure for pressing the Peltier element is not applied,
An object of the present invention is to prevent the Peltier element from being destroyed.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and has a plate-like Peltier element interposed between a cooling plate and a heat radiating plate whose smooth opposing surfaces are opposed to each other. In a cooling device in which a screw arranged on the cooling plate is screwed to a heat radiating plate, and a Peltier element is sandwiched between the cooling plate and the heat radiating plate, the cooling device projects from the opposing surface of the heat radiating plate toward the cooling plate. The object of the present invention is to solve the above-mentioned problem by providing a cooling device characterized in that an interval regulating means for maintaining an interval between the plate and the heat radiating plate is provided on the heat radiating plate. In the present invention, a spacer may be interposed between the cooling plate and the heat radiating plate, the spacer corresponding to the facing surface interval, and the screw disposed on the cooling plate may be screwed to the heat radiating plate through the spacer. It is possible. Further, the screw may be disposed so as not to be in contact with the cooling plate via a screw seat made of a heat insulating material, and the interval regulating means may be configured to abut against the cooling plate via the heat insulating material. Things.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail with reference to the embodiments shown in FIGS. 3 and 4 are denoted by the same reference numerals, and description thereof is omitted. In the cooling device 1 of the present invention, the Peltier element 3 is located between the cooling plate 2 and the heat radiating plate 4 as shown in the figure, and the screw 8 passed through the screw insertion hole 6 on the cooling plate 2 side has a predetermined torque. (Torque which does not break the Peltier element) The two plates are connected by being screwed into the screw hole 9 of the heat radiation plate 4, and the point that the Peltier element is sandwiched by both plates is the same as the conventional one. The cooling device 1 of the present invention is different from the above-described conventional example in that the gap regulating means 10 is provided near each of the screwing portions 5. The space regulating means 10 provided in the vicinity of each screwing portion 5 is located at a position not overlapping with the screw 8 and the screw hole 9, and as shown in FIG. 2 protrudes toward the opposing surface 2 a of the heat radiation plate 4.
2, a screw hole 13 is opened.
1 from the radiating fin side, the screw portion 14 of the screw 11 moves from the opposing surface 4a to the opposing surface 2 of the cooling plate 2.
a. The protruding tip of the screw portion 14 of the screw 11 is in contact with the opposing surface 2a of the cooling plate 2 via the heat insulating material 15, and the opposing surfaces 2a and 4a
The distance between the opposing surfaces is regulated so that the cooling plate 2 does not move in a direction in which the distance between the cooling plates 2 becomes narrower. As described above, the cooling plate 2 and the heat radiating plate 4 are connected by the screw 8, and the interval regulating means 10 by the screw portion 14 of the screw 11 is in contact with the facing surface 2 a side of the cooling plate 2. The space between the cooling plate 2 and the heat radiating plate 4 is maintained at the initial space of the assembly, so that even if vibration or the like is applied to the cooling device, no pressure is applied to the Peltier element 3 and the Peltier element is destroyed. Problems such as breakdowns are prevented.

[0008] The distance regulating means 1 in the above-described example.
Since 0 is composed of the screw portion 14 of the screw 11, the screw 11 may loosen with respect to the screw hole 13 of the heat radiation plate 4. In this case, an adhesive may be applied around the screw 11 and fixed to prevent loosening. Further, in the above-described example, the screw seat of the heat insulating material is used to prevent heat conduction, and the heat insulating material is interposed between the gap regulating means and the cooling plate, but this is not always necessary.

FIG. 2 shows a second example. In this second example, a cylindrical spacer 16 made of a heat insulating material is provided on each screwed portion 5. This spacer 1
The thickness of 6 is the same as or slightly smaller than the thickness of the Peltier element, and when the cooling device 1 is assembled, the opposing surfaces 2a and 4
The screw 8 is passed through the screw insertion hole 6 of the cooling plate 2 and the spacer 16 and then screwed into the screw hole 9 of the heat radiation plate 4. When the screws 8 are tightened with the spacers 16 interposed in advance at the screwing portions 5 during assembly in this manner, the inclination of the cooling plate during assembly indicated by the phantom line in FIG. 2 can be suppressed. As a result, the Peltier element can be properly held between the two plates, so that the assembling work becomes easier.

Although the thickness of the spacer is slightly smaller than the thickness of the Peltier element, it is possible,
Of course, the cooling plate is placed on the Peltier element and is smaller than the thickness of the Peltier element as long as the Peltier element is not damaged when screwed.

[0011]

As described above, in the cooling device of the present invention, a plate-shaped Peltier element is interposed between a cooling plate and a heat radiating plate whose smooth opposing surfaces are opposed to each other, and is arranged on the cooling plate. In the cooling device in which the screw is screwed to the heat radiating plate and a Peltier element is sandwiched between the cooling plate and the heat radiating plate, the cooling plate and the heat radiating plate project from the opposite surface of the heat radiating plate toward the cooling plate. An interval regulating means for maintaining an interval is provided on the heat radiating plate.

As described above, the gap regulating means suppresses the movement of the cooling plate in the direction of coming into contact with the cooling plate to reduce the gap between the opposing surfaces, and the gap between the cooling plate and the heat radiation plate at the beginning of the assembly of the cooling device is reduced. The Peltier device is maintained even if vibration or the like is applied to the cooling device from the outside, so that destruction or failure can be prevented.

Further, since the cooling plate and the heat radiating plate are connected by screws arranged on the side of the cooling plate, and the space regulating means is in contact with the cooling plate, the screw holes around the screw holes of the heat radiating plate are screwed. A small internal stress occurs to suppress the loosening of the screw, and even if vibration is applied to the cooling device, the Peltier element is securely sandwiched and supported. .

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a cross section of an example of a cooling device according to the present invention.

FIG. 2 is an explanatory view showing another example in cross section.

FIG. 3 is an explanatory view showing a conventional cooling device.

FIG. 4 is an explanatory view showing a conventional example in cross section.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Cooling device 2 ... Cooling plate 3 ... Peltier element 4 ... Heat dissipation plate 5 ... Screw part 8 ... Screw 10 ... Spacing regulating means 11 ... Screw 15 ... Insulation material 16 ... Spacer

Claims (3)

[Claims] 1. A plate-like Peltier element is interposed between a cooling plate and a heat radiating plate whose smooth opposing surfaces are opposed to each other, and a screw arranged on the cooling plate is screwed to the heat radiating plate. In a cooling device in which a Peltier element is sandwiched between a cooling plate and a heat radiating plate, the heat radiating plate includes: A cooling device, wherein the cooling device is provided. 2. A heat-dissipating spacer interposed between the cooling plate and the heat-dissipating plate corresponding to the distance between the opposed surfaces, and the screw disposed on the cooling plate is screwed to the heat-dissipating plate through the spacer. Item 2. The cooling device according to Item 1. 3. The cooling plate according to claim 1, wherein the screw is disposed so as not to contact the cooling plate via a screw seat made of a heat insulating material, and the gap regulating means is abutted against the cooling plate via the heat insulating material. 3. The cooling device according to 2.