JPS6093291A - Lamination type heat exchanger - Google Patents

Abstract

PURPOSE:To improve heat exchanging efficiency by a method wherein a heat conductive board is provided with flow paths for input gas and return gas. CONSTITUTION:The high pressure input gas pipe 5 and the return gas pipe 6 of nitrogen are connectsd to a heat insulating board 7 while the heat conductive board 10, having the flow path 8 for the return gas and the flow path 9 for the high pressure input gas at the lower part thereof, is prepared. Further, the heat insulating board 13, having a hole 11 for return gas and the hole 12 for the high pressure input gas, is provided below the heat conductive board 10. Furthermore, the heat conductive board 10 and the heat insulating board 7 are provided below the heat insulating board 13 while the heat exchanger is constituted of the combination of 7-10-13-10-7...-13-10-7. Flow paths 8, 9 are provided in the plane of the heat conductive board and whereby a heat exchanging area between the high-temperature side high pressure input gas and the low-temperature side low pressure return gas may be increased and the heat exchanger, having a high heat exchanging efficiency, may be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a laminated heat exchanger, and more particularly to a laminated heat exchanger that has an increased heat exchange area and improved heat exchange efficiency.

Technology Background Heat exchangers that bring two fluids (gas or liquid) with different temperatures into contact through a solid wall and transfer heat between the two fluids are structurally divided into shell-and-tube heat exchangers and double-tube heat exchangers. Various heat exchangers are known, such as type heat exchangers and laminated type heat exchangers.

Among the above-mentioned heat exchangers, the laminated heat exchanger is often used in refrigerators and the like where miniaturization is required due to its advantages such as light weight and small size.

Prior Art and Problems As shown in Figure 1, a conventional laminated heat exchanger consists of a thermally insulating plate made of polyethylene with a thickness of about 0.1 mm, and a plate made of copper with a thickness of about 0.2 mm. Thermal conductive plates 2 are alternately laminated. Each plate is provided with holes 3 and 4 through which the input gas and the return gas B pass, and the input gas A and the return gas B are caused to exchange heat by the thermally conductive plate 2. The thickness of the thermally insulating plate l and the thermally conductive plate is, for example, 0.2 mm.
That's about it.

Since the structure is as shown in FIG. 1 and explained above, heat conduction is poor in the gas flow direction, but heat conduction is good in the direction perpendicular to the gas flow. In a heat exchanger having such a structure, the heat exchange efficiency of the high-pressure input gas A on the high-temperature side being heat exchanged to become the low-pressure return gas B on the low-temperature side is determined by the heat exchange area (inner wall area layer of 63, 4). It is so small that its improvement is hindered.

OBJECTS OF THE INVENTION In view of the above drawbacks, it is an object of the present invention to provide an improved heat exchanger with improved heat exchange efficiency.

Structure of the Invention The object of the present invention is to alternately laminate thermally insulating plates and thermally conductive plates, and to provide input gas flow ports and return gas flow ports on the thermally insulating plates and the thermally conductive plates. A laminated heat exchanger in which two flow ports are respectively provided; Achieved by a laminated heat exchanger characterized in that the thermally conductive plate is provided with the input gas flow path and the return gas flow path. . In other words, in the present invention, gas flow channels are provided in the plane direction of the plate to increase the heat exchange area.

Embodiments of the Invention Below, embodiments of the present invention will be described based on the drawings. FIG. 2 is a schematic perspective view showing one embodiment of the present invention.

In FIG. 2, a high-pressure input gas pipe 5 of, for example, nitrogen and a return gas vibro are connected to a thermally insulating plate 7 made of, for example, polyethylene, and a flow path 8 for return gas and a flow path 9 for high-pressure input gas are provided at the bottom thereof. is equipped with a plate of good thermal conductivity made of copper (good thermal conductivity plate). A and B indicate high pressure input gas and low pressure return gas, respectively. A thermally insulating plate 13 having a return gas hole 11 and a high-pressure input gas hole 2 is provided at the bottom of the thermally conductive plate 10. The heat exchanger of this embodiment is provided with the above-mentioned thermally conductive plate lO and thermally insulating plate 7 below the thermally insulating plate 13, and the plates 7-10-13-10-7... -13-10-7. By providing the flow paths 8 and 9 within the plane of the thermally conductive plate, the heat exchange area between the high-pressure input gas on the high-temperature side and the low-pressure return gas on the low-temperature side increases, and the heat exchange efficiency increases. A gas heat exchanger is obtained (direction of gas flow is indicated by arrows).

If a sufficient flow passage cross-sectional area cannot be obtained due to the thinness of the plate of the thermally good conductor described above, the plate 10', 10'' may be replaced with a multilayer plate having passages of the same pattern as shown in Fig. 3. do it.

As described in detail, according to the present invention, the heat exchange area of the high temperature side gas flow path and the low temperature side gas flow path is increased, so that the heat exchange efficiency of the heat exchanger can be improved. As a result, the heat exchanger can be made lighter and smaller if only the same heat exchange efficiency is obtained.

[Brief explanation of drawings]

FIG. 1 is a schematic perspective view for explaining the prior art;
FIG. 2 is a schematic perspective view of the shelf 1 for explaining one embodiment of the present invention, and FIG. 3 is a schematic cross-sectional view of a main part of the shelf 1 for explaining another embodiment of the present invention. 1.7.10''...Thermal insulating plate, 2.10,10'...Thermal conductive plate, 3.4...Hole, 5...High pressure input gas pipe, 6...
・Return gas pipe, 8...Return gas flow path, 9...High pressure input gas flow path, 11...Return gas hole, 12...
Hole for high pressure input gas. Patent applicant Fujitsu Limited Patent application agent Akira Aoki Patent attorney Kazuyuki Nishidate Patent attorney Yukio Uchida Patent attorney Akira Yamaguchi 3rd session

Claims (1)

[Claims] 1. Thermal insulating plates and thermally conductive plates are laminated alternately, and the thermally insulating plates and the thermally conductive plate are provided with two flow ports, an input gas flow port and a return gas flow port, respectively. 1. A laminated heat exchanger, characterized in that the thermally conductive plate is provided with the input gas flow path and the return gas flow path.