Welding method of connector and connection tube, connection structure and heat exchanger
AssigneeSanhua (Hangzhou) Micro Channel Heat Exchanger Co., Ltd.
InventorsYuzhang LIU, Han ZHOU, Yuke ZUO, Chuanting WANG
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Abstract
A welding method for a connector and a connection tube of a heat exchanger are proposed. The method includes: forming a diffusion layer on a surface of the connector, a corrosion potential of the diffusion layer being less than a corrosion potential of the connector; inserting a connection tube into the connector; brazing the connection tube to the connector by a brazing filler metal, a corrosion potential of a weld metal formed after brazing of the brazing filler metal being higher than the corrosion potential of the connector and less than a corrosion potential of the connection tube.
Claims23
A welding method of a connector and a connection tube of a heat exchanger, comprising:
- forming a diffusion layer on a surface of the connector, a corrosion potential of the diffusion layer being less than a corrosion potential of the connector;
- inserting a connection tube into the connector;
- brazing the connection tube to the connector by a brazing filler metal, a corrosion potential of a weld metal formed after brazing of the brazing filler metal being higher than the corrosion potential of the connector and less than a corrosion potential of the connection tube.
13-15. (canceled)
A connection structure of a heat exchanger, comprising:
- a connector, a diffusion layer being formed on a surface of the connector;
- and
- a connection tube inserted into the connector and brazed with the connector through a brazing filler metal,
- wherein a corrosion potential of the diffusion layer, a corrosion potential of the connector, a corrosion potential of a weld metal formed after brazing of the brazing filler metal, and a corrosion potential of the connection tube increase in sequence.
(canceled)
A heat exchanger, comprising:
- a header;
- and
- a connection structure of a heat exchanger, comprising:
- a connector, a diffusion layer being formed on a surface of the connector;
- and
- a connection tube inserted into the connector and brazed with the connector through a brazing filler metal,
- wherein a corrosion potential of the diffusion layer, a corrosion potential of the connector, a corrosion potential of a weld metal formed after brazing of the brazing filler metal, and a corrosion potential of the connection tube increase in sequence,
- wherein the connector is connected to the header, and the connection tube is communicated with the header through the connector.
(canceled)
Dependencies are inferred from the claim text.