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Heat exchanger

a technology of heat exchanger and projecting portion, which is applied in the direction of indirect heat exchanger, refrigeration components, light and heating apparatus, etc., can solve the problems of further enhancement of withstand pressure and failure to meet a demand, and achieve the effects of enhancing heat exchange performance, stabilizing divided flow, and facilitating the formation of projecting portions

Inactive Publication Date: 2008-01-24
SHOWA DENKO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0005] An object of the present invention is to solve the above problem and to provide a heat exchanger which is further enhanced in terms of withstand pressure.

Problems solved by technology

Therefore, this heat exchanger is usually sufficient in terms of withstand pressure in application to a gas cooler or an evaporator of a supercritical refrigeration cycle, but may fail to meet a demand, should it arise, for further enhancement in withstand pressure.

Method used

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Embodiment Construction

[0040] An embodiment of the present invention will next be described in detail with reference to the drawings. This embodiment is implemented by applying a heat exchanger according to the present invention to a gas cooler of a supercritical refrigeration cycle.

[0041] In the following description, the upper, lower, left-hand, and right-hand sides of FIGS. 1 and 2 will be referred to as “upper,”“lower,”“left,” and “right,” respectively. Also, the downstream side of flow (represented by arrow X in FIG. 1) of air through air-passing clearances between adjacent heat exchange tubes will be referred to as the “front,” and the opposite side as the “rear.”

[0042]FIGS. 1 and 2 show the overall construction of a gas cooler to which the heat exchanger according to the present invention is applied. FIGS. 3 to 6 show the configuration of essential portions of the gas cooler of FIG. 1. FIGS. 7 and 8 show a method of manufacturing header tanks. FIGS. 9 and 10 show a heat exchange tube. FIG. 11 show...

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Abstract

A heat exchanger includes two header tanks and a plurality of heat exchange tubes. The header tanks each include an outside plate, an inside plate, and an intermediate plate. The outside plate has an outwardly bulging portion(s). The inside plate has a plurality of tube insertion holes. The intermediate plate has communication holes for allowing communication of the tube insertion holes with the outwardly bulging portion of the header tank. A pair of inclined portions inclined in a fanning-out fashion toward the inside plate are formed at inside-plate-side edge portions of opposite wall surfaces of each communication hole which extend in the hole-length direction. Projecting portions of the inside plate are formed by bending, toward the intermediate plate, portions of the inside plate located at opposite edges of each tube insertion hole which extend in the hole-length direction. The projecting portions are closely brazed to the corresponding inclined portions.

Description

BACKGROUND OF THE INVENTION [0001] The present invention relates to a heat exchanger, and more particularly to a heat exchanger that can be favorably used as a gas cooler or an evaporator of a supercritical refrigeration cycle in which a CO2 (carbon dioxide) refrigerant or a like supercritical refrigerant is used. [0002] Herein and in the appended claims, the term “aluminum” encompasses aluminum alloys in addition to pure aluminum. Furthermore, herein and in the appended claims, the term “supercritical refrigeration cycle” means a refrigeration cycle in which a refrigerant on the high-pressure side is in a supercritical state; i.e., assumes a pressure in excess of a critical pressure. The term “supercritical refrigerant” means a refrigerant used in a supercritical refrigeration cycle. [0003] A conventionally known heat exchanger for use in a supercritical refrigeration cycle includes a pair of header tanks disposed apart from each other; flat heat exchange tubes disposed in parallel...

Claims

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Application Information

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IPC IPC(8): F28F9/04
CPCF25B39/00F25B2500/01F28D1/0391F28D1/05391F28F9/0246F28D2021/0085F28F9/0209F28F9/0224F28F9/0229F28D2021/0073
Inventor ICHIYANAGI, SHIGEHARUIGAWA, SHUNSUKE
Owner SHOWA DENKO KK
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