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Heat exchanger

A technology for heat exchangers and main piping, applied to heat exchange equipment, indirect heat exchangers, heat exchanger shells, etc., can solve problems such as complexity and increased production costs, and achieve improved productivity, reduced material costs, and improved processing The effect of simple work

Active Publication Date: 2007-07-25
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] When inserting the end of the elbow pipe into the end of the main pipe, it is necessary to expand the end of the main pipe, which is also troublesome and has a problem of increasing the production cost.

Method used

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  • Heat exchanger
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiments of the present invention will be described below with reference to the drawings. Fig. 1 is a refrigerant circuit diagram (embodiment 1) equipped with a heat exchanger embodiment of the present invention, Fig. 2 is a perspective view of the heat exchanger of the present invention viewed from one side, and Fig. 3 is a view of the heat exchanger of Fig. 2 viewed from the other side stereogram.

[0049] Among the figure, 1 is an internal intermediate pressure type multilayer (two-layer) compression type rotary compressor using carbon dioxide as a refrigerant, and this rotary compressor 1 includes: a cylindrical airtight container 2 made of steel plates; The electric element 4 is arranged and accommodated on the upper side of the inner space of the airtight container 2; Element 10 (first layer) and second rotary compression element 12 (second layer) constitute.

[0050] The airtight container 2 includes: a container body 2A, which accommodates the electric elem...

Embodiment 2

[0073] FIG. 6 is an enlarged view showing a main part of a gas cooler 24 as a heat exchanger in another embodiment of the present invention. This gas cooler 24 has substantially the same structure as that of the above-mentioned embodiment. The different parts are explained below. The same reference numerals are assigned to the same parts as those in the above-mentioned embodiments, and description thereof will be omitted. That is, as shown in FIG. 6 , the elbow pipe 36 does not extend the tip of the end portion 37 to the tube plate 27 , but is formed to have a short length from the tube plate 27 to a position separated by a predetermined distance.

[0074] Thus, since the end portion 37 of the elbow pipe 36 is formed shorter than in the first embodiment, the operability when inserting the end portion 37 of the elbow pipe 36 into the end portion 33 of the main pipe 32 can be improved. Since the processing operation of the end portion 37 of the elbow pipe 36 can also be simpli...

Embodiment 3

[0076] FIG. 7 is an enlarged view showing a main part of a gas cooler 24 as a heat exchanger in another embodiment of the present invention. This gas cooler 24 has substantially the same structure as that of the above-mentioned embodiment. The different parts are explained below. The same reference numerals are assigned to the same parts as those in the above-mentioned embodiments, and description thereof will be omitted. That is, the main pipe 32 is formed into a cylindrical shape with an outer diameter of 7.94mm, a wall thickness of 1.00mm, and an inner diameter of 5.94mm (shown in the first column of this technology in FIG. 12 ), and is formed from one end to the other end. It has a linear shape with the same wall thickness, and the roughly central part is bent into a U-shape.

[0077] The elbow pipe 36 has an outer diameter of 6.35 mm and a wall thickness of 1.00 mm, and is formed in a cylindrical shape with substantially the same wall thickness from one end to the other...

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Abstract

A heat exchanger using a high-pressure refrigerant, and the present invention provides a heat exchanger in which a main pipe used in the heat exchanger can effectively prevent cracks and other damage caused by the pressure of the refrigerant. The heat exchanger (gas cooler (24)) of the present invention consists of a main pipe (32) having a straight pipe portion and an elbow pipe ( 36) Serpentine refrigerant piping (3) constituted. The end (37) of the elbow pipe (36) is inserted into the end (33) of the main pipe (32) and welded. The outer diameter of the end (37) of the elbow pipe (36) is smaller than the outer diameter of the end (33) of the main pipe (32).

Description

technical field [0001] The present invention relates to a heat exchanger in which serpentine refrigerant piping is formed of a main pipe having a straight pipe portion and curved elbow pipes connecting ends of the main pipe to each other. Background technique [0002] A conventional heat exchanger of this type is composed of a plurality of heat exchange fins arranged at predetermined intervals, and meandering refrigerant pipes penetrating the heat exchange fins. When assembling the heat exchanger, first insert a plurality of heat exchange fins with through holes in advance into a plurality of straight main pipes at predetermined intervals, and then insert a pipe expansion jig into the main pipes and expand from the inside. Thus, the main pipe expands to enlarge its diameter and contacts the inside of the holes formed in the heat exchange fins and the tube plate, so that such main pipe is fixed to the heat exchange fins and the tube plate. A tube sheet thicker than the heat ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28F9/26F25B1/00F25B39/00F28D1/047
Inventor 柳裕文玉山弘司佐藤淳小林敬弘针生聪内田朋宏
Owner SANYO ELECTRIC CO LTD