JPH0533899Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) The invention fixes a cooling member and a heat radiation member in contact with the cooling side and heat radiation side surfaces of a thermoelectric element, respectively. This invention relates to a storage with an improved thermoelectric element mounting device.

(Prior Art) Conventionally, as shown in FIG. 3, a thermoelectric element mounting device in a storage of this type has a heat transfer block 2a and a heat transfer block 2a of a cooling member 2 on each side of the cooling side and heat radiation side of the thermoelectric element 1, respectively. With the heat dissipation member 3 in contact with the heat dissipation member 3, screws 4 inserted through the projections 2b of the heat transfer block 2a are tightened to the heat dissipation member 3, thereby integrating the thermoelectric element 1, the cooling member 2, and the heat dissipation member 3. It was something to do.

(Problem to be Solved by the Invention) However, in the above configuration, the tightening force of the screw 4 is directly applied to both sides of the thermoelectric element 1 via the heat transfer block 2a and the heat dissipation member 3. If 4 is tightened too strongly, excessive tightening force is applied to both sides of the thermoelectric element 1, which may damage the thermoelectric element 1, which is a major cause of assembly failure.

The present invention is intended to solve these problems, and therefore, its purpose is to provide a storage that can prevent damage to thermoelectric elements during installation.

[Structure of the invention] (Means for solving the problem) The storage of the invention includes a thermoelectric element located in an opening for installation provided in the heat insulating wall of the storage body, and a surface on the heat absorption side of the thermoelectric element. a cooling member in contact with the thermoelectric element; a heat radiating member in contact with the heat radiating side surface of the thermoelectric element;
a connecting body made of a hard heat insulating material, which is provided on the inner periphery of the installation opening of the heat insulating wall to insulate the inside and outside of the refrigerator, and connects the cooling member and the heat radiating member individually at a predetermined interval; The connecting body is provided with a spacing regulating protrusion made of a hard heat insulating material interposed between an end face of the cooling member on the thermoelectric element side and an end face of the heat dissipating member on the thermoelectric element side, and the spacing regulating protrusion is provided with a hard insulating material. The thickness of the thermoelectric element is set to be approximately the same as the thickness of the thermoelectric element.

(Function) A spacing regulating convex portion made of a hard heat insulating material whose thickness dimension is approximately the same as that of the thermoelectric element is interposed between the end face of the cooling member on the thermoelectric element side and the end face of the heat dissipation member on the thermoelectric element side. Therefore, part of the load applied to the thermoelectric element from the cooling member and the heat dissipation member during the installation work can be received by the interval regulating convex portion, and the load on the thermoelectric element is reduced. In addition, the cooling member and the heat dissipation member are installed separately at a predetermined distance from the connection body made of hard heat insulating material that insulates the inside and outside of the refrigerator at the inner periphery of the opening for attachment of the insulation wall of the refrigerator main body. Since they are connected, it is possible to reliably insulate the inside and outside of the refrigerator while preventing heat leakage between the cooling member and the heat radiating member, thereby increasing cooling (heat retention) efficiency.

(Example) Hereinafter, an example in which the present invention is applied to an electronic refrigerator will be described based on FIGS. 1 and 2. First, in FIG. 2 showing the overall configuration, reference numeral 11 denotes the cabinet body of the electronic refrigerator.
It is centrally installed through. As shown in FIG. 1, a rectangular opening 14, for example, is formed in the rear heat insulating wall 13 of the storage body 11, and a connecting body 15 is provided at the inner edge of the opening 14. The connecting body 15 is made of a hard heat insulating material and has a rectangular tube shape.
A step 16 is formed at the center of the inner periphery and projects perpendicularly toward the center of the opening 14, and screw holes 17 are formed at predetermined positions on both the front and rear surfaces of the step 16. On the other hand, 18 is the connecting body 15
A thermoelectric element placed inside the
8a, and the rear surface becomes the heat radiation surface 18b. Reference numeral 19 denotes a cooling member disposed inside the storage body 11, which is formed by tightening and fixing cooling fins 21 to the front end surface of the heat transfer block 20 with screws 22. A screw fixing protrusion 23 is integrally provided on the heat transfer block 20 in a manner corresponding to the screw hole 17 of the connecting body 15.
The cooling member 19 is fixedly attached to the connecting body 15 by tightening the screw 24 inserted into the insertion hole of the screwing protrusion 23 into the screw hole 17 of the connecting body 15. On the other hand, 25 is a heat dissipation member disposed outside the storage body 11, which is the cooling member 19.
It has a configuration that is substantially symmetrical to the above, and consists of a heat transfer block 26 and a heat radiation fin 27 that are integrated with a screw 28. Then, by tightening the screw 30 inserted into the insertion hole of the screw fixing protrusion 29 of the heat transfer block 26 into the screw hole 17 of the connecting body 15, the heat dissipation member 2
5 is attached and fixed to the connecting body 15. As described above, the cooling member 19 and the heat dissipating member 25 are connected to the connecting body 1.
5, thereby connecting the thermoelectric element 18
The end faces 20 of both the heat transfer blocks 20 and 26 on the cooling side and the heat radiation side are provided on the cooling surface 18a and the heat radiation surface 18b, respectively.
a and 26a are in contact with each other. Reference numeral 31 denotes a spacing regulating protrusion 31 made of heat insulating material and integrally protruding from the entire circumference of the part of the stepped portion 16 of the connecting body 15 that faces the thermoelectric element 18.
are the end faces 20a, 26 of both heat transfer blocks 20, 26.
It is interposed between a. In this case, the thickness dimension A of the interval regulating convex portion 31 is approximately the same as the thickness dimension B of the thermoelectric element 18, specifically, the thickness dimension B of the thermoelectric element 18.
It is set 0.1 to 0.2 mm smaller than the actual size. As a result, the end surfaces 20a, 26a of both heat transfer blocks 20, 26 are brought into pressure contact with both surfaces 18a, 18b of the thermoelectric element 18 by the tightening force of the screws 24, 30, while the end surfaces 20a, 26a are brought into contact with the spacing regulating convexes. Part 31
It can also be brought into contact with both sides of the still,
Dimension C from the side surface of the interval regulating convex portion 31 to the side surface of the stepped portion 16 and the end surface 2 of each heat transfer block 20, 26
Regarding the dimension D from 0a, 26a to the screw fixing protrusions 23, 29, the dimension C is set 0.1 to 0.2 mm smaller than the dimension D, taking into account the molding error of each part. The end faces 20a, 26a of the heat transfer blocks 20, 26 are connected to both sides 18 of the thermoelectric element 18.
a, 18b so as to be able to reliably come into contact with them.

Next, the operation of the above configuration will be explained. Thermoelectric element 1
8, after screwing one of the heat transfer blocks 20 and 26 on the cooling side and the heat radiation side to the connecting body 15, the other heat transfer block is screwed so as to sandwich the thermoelectric element 18. Just screw it on. At this time, by applying the tightening force of the screws 24, 30 to both surfaces 18a, 18b of the thermoelectric element 18 through each heat transfer block 20, 26, the end surfaces 20a, 26a of each heat transfer block 20, 26 are thermoelectrically Pressed against both sides 18a and 18b of the element 18,
While ensuring heat transfer between the two, the thermoelectric element 1
8 is sandwiched between each heat transfer block 20 and 26. In this case, the thickness dimension A is the thermoelectric element 18
Since the spacing regulating protrusion 31 having substantially the same thickness dimension B is interposed between the end surfaces 20a and 26a of each heat transfer block 20 and 26, it is assumed that the screws 22 and 2
Even if the tightening force of No. 4 is too strong, the end surfaces 20a, 26a of each heat transfer block 20, 26 come into contact with the spacing regulating protrusion 31, so that part of the tightening force is transferred to the spacing regulating protrusion 31. 31, the load on the thermoelectric element 18 is reduced. Therefore, it is possible to prevent excessive tightening force from being applied to the thermoelectric element 18 during the tightening operation, and damage to the thermoelectric element 18 can be prevented. Moreover, since the spacing regulating protrusion 31 is provided on the connecting body 15, the thermoelectric element 18 can be positioned with respect to the coupling body 15 by the spacing regulating protruding part 31, and the amount of tightening of the screws 24 and 30 is limited. To be uniform, that is, each heat transfer block 20, 26
The spacing regulating convex portion 31 can prevent the heat transfer blocks 20 and 26 from being tightened in an inclined state, thereby ensuring good contact between the heat transfer blocks 20 and 26 and the thermoelectric element 18. In addition, in the conventional structure, as shown in FIG. 3, the same screw 4 is inserted across the cooling member 2 and the heat radiating member 3, so that heat is transmitted through the screw 4. However, in this embodiment, the cooling member 19 and the heat dissipating member 25 are connected via the connecting body 15 made of a heat insulating material. By tightening the cooling member 19 and the heat radiating member 25 with separate screws 24 and 30, respectively, the space between the cooling member 19 and the heat radiating member 25 can be reliably insulated by the connecting body 15,
Cooling efficiency can be improved.

In addition, in the above embodiment, the interval regulating convex portion 31 (connecting body 15) is formed of a hard heat insulating material.
The thickness dimension A of the interval regulating convex portion 31 is made slightly smaller than the thickness dimension B of the thermoelectric element 18 to ensure contact between each heat transfer block 20, 26 and the thermoelectric element 18. However, the present invention is not limited to this, and if the dimensions A and B of both are made the same, or if the spacing regulating protrusions are formed of a heat insulating material that deforms slightly due to the tightening load, the spacing regulating protrusions may be The thickness of the thermoelectric element may be slightly larger than that of the thermoelectric element, and in this case, the same effect as in this embodiment can be obtained. In this embodiment, the interval regulating convex portion 31 is provided on the entire inner circumference of the cylindrical connecting body 15, but for example,
A similar effect can be obtained even if the structure is provided intermittently only in the portions corresponding to numbers 4 and 30. Furthermore, in this embodiment, both the cooling member 19 and the heat radiating member 25 have heat transfer blocks 20 and 26, but as in FIG. 3, one of the heat transfer blocks is omitted. Alternatively, the heat transfer block and the cooling fins (radiation fins) may be integrally formed.

[Effects of the invention] As is clear from the above description, the present invention connects the cooling member and the heat dissipating member individually through a connecting body made of a hard heat insulating material, and also connects the cooling member and the heat dissipating member individually through a connecting body made of a hard heat insulating material, and also connects the cooling member and the heat dissipating member through a space regulating convex portion provided on the connecting body. is interposed between the end face of the cooling member on the thermoelectric element side and the end face of the heat dissipation member on the thermoelectric element side, so it is possible to prevent damage to the thermoelectric element during installation work, and also to prevent the cooling member and the heat dissipation member from being damaged. The insulation between the two is ensured by the connecting body,
It has excellent effects such as improving cooling efficiency.

[Brief explanation of the drawing]

Figures 1 and 2 show an embodiment of the present invention, with Figure 1 being an enlarged longitudinal sectional side view of the main parts, Figure 2 being a perspective view of the whole, and Figure 3 being a conventional example. FIG. 1 is a diagram corresponding to FIG. In the drawing, 13 is a rear insulation wall, 14 is an opening, 1
5 is a connecting body, 18 is a thermoelectric element, 19 is a cooling member,
20 is a heat transfer block, 21 is a cooling fin, 25 is a heat radiation member, 26 is a heat transfer block, 27 is a heat radiation fin, and 31 is a spacing regulating convex portion.

Claims (1)

[Scope of Claim for Utility Model Registration] A thermoelectric element located within a mounting opening provided in a heat insulating wall of the storage body, a cooling member in contact with the heat absorption side surface of the thermoelectric element, and a heat radiation side of the thermoelectric element. a heat dissipation member that contacts the surface of the heat insulating wall, and the cooling member and the heat dissipation member are individually connected at a predetermined interval, and the cooling member and the heat dissipation member are provided on the inner periphery of the mounting opening of the heat insulating wall to insulate the inside and outside of the refrigerator. a connecting body made of a hard insulating material, the connecting body having a spacing regulation made of a hard insulating material interposed between an end face of the cooling member on the thermoelectric element side and an end face of the heat dissipation member on the thermoelectric element side. A storage, characterized in that a convex portion is provided, and the thickness of the interval regulating convex portion is set to be approximately the same as the thickness of the thermoelectric element.