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Heat exchanger

A technology of heat exchangers and heat exchange tubes, which is applied to heat exchange equipment, heat exchanger types, heat exchanger shells, etc., and can solve problems such as insufficient corrosion resistance of heat exchange tubes

Inactive Publication Date: 2019-03-05
KEIHIN THERMAL TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in the heat exchanger manufactured by the above method, the corrosion resistance of the heat exchange tube may be insufficient

Method used

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Embodiment Construction

[0014] Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, the heat exchanger of the present invention is applied to a condenser for an automobile air conditioner.

[0015] figure 1 It shows the overall structure of the condenser for automobile air conditioner to which the heat exchanger of the present invention is applied, figure 2 Indicates the structure of its main part.

[0016] And, in the description below, the figure 1 Up and down, left and right are called up and down, left and right.

[0017] exist figure 1 Among them, a condenser 1 for an automobile air conditioner includes: a plurality of flat heat exchange tubes 2 made of aluminum extruded materials, which have their longitudinal directions oriented to the left and right directions and their width directions oriented to the ventilation direction. The thickness direction of the tube 2) is arranged at intervals; the corrugated fins 3 made of aluminum-...

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Abstract

A condenser (1) as a heat exchanger includes a plurality of heat exchange tubes (2) formed from an aluminum extrudate and fins (3) made of an aluminum bare material, arranged between adjacent heat exchange tubes and jointed with the heat exchange tubes through brazing filler metal. The wall (30) of each heat exchange tube is composed of a main body portion (31) made of an Al alloy forming the aluminum extrudate, and a covering layer (32) made of an Al-Si-Zn alloy and covering the main body portion (31). A diffusion layer (33) containing Zn and Si diffused from the Al-Si-Zn alloy is formed in an outer surface layer portion of the main body portion (31). A low potential portion whose spontaneous potential is the lowest, and a high potential portion whose spontaneous potential is 60 mV or more higher than that of the low potential portion, are present within a range between an outermost surface (34) of the wall and a deepest portion (35) of the diffusion layer (33) such that the low potential portion is located toward the outermost surface (34) of the wall (30).

Description

technical field [0001] The present invention relates to a heat exchanger, and more specifically, to a heat exchanger used as a condenser of an automobile air conditioner mounted in a vehicle such as an automobile, for example. [0002] In this specification and claims, the term "aluminum" includes aluminum alloys in addition to pure aluminum. In addition, materials represented by element symbols represent pure materials, and the term "Al alloy" represents aluminum alloys. [0003] In addition, in this specification, "spontaneous potential" is an electrode potential that a material has with respect to a saturated calomel electrode (S.C.E) as a standard electrode in 5% NaCl, pH 3 (acidic) aqueous solution. Background technique [0004] As a heat exchanger used in a condenser for an automobile air conditioner, the following structure is known, which includes a plurality of flat heat exchange tubes made of aluminum extruded material, with the longitudinal direction oriented in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28D1/053F28F21/08
CPCF28D1/05366F28F21/084F28F9/0251F28D2021/0084F28F2255/16F28D1/05375F28F19/06
Inventor 高桥一幸大槻拓史小林真奈
Owner KEIHIN THERMAL TECH CORP
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