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Heat exchanger and manufacturing method thereof

一种热交换器、制造方法的技术，应用在热交换器固定、热交换设备、化学仪器和方法等方向，能够解决腐蚀的深度变浅等问题，达到实现轻质化、耐蚀性提高的效果

Inactive Publication Date: 2019-06-18
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 described in Patent Document 2, in order to secure the required corrosion resistance after thinning the heat exchange tube, it is necessary to reduce the depth of corrosion occurring in the tube wall of the heat exchange tube.

Method used

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  • Heat exchanger and manufacturing method thereof
  • Heat exchanger and manufacturing method thereof
  • Heat exchanger and manufacturing method thereof

Examples

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Embodiment

[0070] preparing an aluminum brazing sheet for forming a heat exchange tube formed of a core material containing 0.40% by mass of Cu, 0.8% by mass of Mn, and 0.1% by mass of Ti, and a first brazing filler metal and a second brazing filler metal. The remainder is composed of Al and unavoidable impurities, the first brazing filler metal contains 7.5% by mass of Si, 2.0% by mass of Zn, and the remainder is composed of Al and unavoidable impurities, and covers one side of the core material, so The second brazing filler metal contains 10% by mass of Si, and the remainder is composed of Al and unavoidable impurities, and covers the other side of the core material. The covering ratio of the first brazing filler metal in the aluminum brazing sheet for forming heat exchange tubes was 16%, and the covering ratio of the second brazing filler metal was 10%. In addition, the Si content which is an unavoidable impurity in a core material was 0.09 mass %, and the Fe content was 0.09 mass %. ...

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Abstract

The present invention provides a heat exchanger capable of securing required corrosion resistance while reducing the thickness of heat exchange tubes. The tube wall (30) of the heat exchange tube of the condenser consists of a core material layer (31), a first solder layer (32) covering the outer surface of the core material layer (31), and an inner layer covering the core material layer (31). The second solder layer (33) on the surface is formed. A Zn diffusion layer (34) is formed on the outer surface layer portion of the core material layer (31). The deepest part of the Zn diffusion layer (34) is located at a depth of 70 to 100 μm from the outermost surface of the tube wall (30) of the heat exchange tube. The Zn concentration of the outermost surface of the tube wall (30) of the heat exchange tube is 0.55% by mass or more, and there is a boundary between the core material layer (31) and the first solder layer (32) in the Zn diffusion layer (34). Portion (35) is a high potential portion in which the spontaneous potential is 41 mV or more higher.

Description

technical field [0001] The present invention relates to a heat exchanger and a manufacturing method thereof. More specifically, the present invention relates to a heat exchanger used as a condenser for an automobile air conditioner mounted in a vehicle such as an automobile and a manufacturing method thereof. [0002] In this specification and claims, the term "aluminum" includes aluminum alloys in addition to pure aluminum. In addition, a material represented by an element symbol means a pure material, and the meaning of the term "Al alloy" means an aluminum alloy. [0003] In addition, in this specification, the term "spontaneous potential" refers to the electrode potential that a material has with respect to a saturated calomel electrode (S.C.E.) as a standard electrode in an aqueous solution of 5% NaCl and pH 3 (acidic). . Background technique [0004] As a heat exchanger used in a condenser for an automobile air conditioner, the following heat exchanger is known: it i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/26F25B39/04
CPCB23P15/26F25B39/04F25B2339/045F28F21/089F28F1/022F28F1/128F28D2021/0084B23K1/0012B32B15/01B32B15/016B32B15/017C22C21/00C22C21/02F28D1/05391F28F21/084F28F2275/04
Inventor 寺田隆大槻拓史小林真奈
Owner KEIHIN THERMAL TECH CORP
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