公开(公告)号：US20220107275A1

公开(公告)日：2022-04-07

申请号：US17426444

申请日：2020-01-27

申请人： DAIKIN INDUSTRIES, LTD.

发明人： Shouhei ARAKI ,  Kunihiro OKADA ,  Hideo OHYA ,  Keisuke IMAZU ,  Sayumi HAMA ,  Yuuji TANAKA

IPC分类号： G01N21/78 ,  G01N17/00

摘要： Provided are a method for inspecting a refrigerant pipe, the method being able to quickly determine durability, and a refrigerant pipe confirmed to be highly durable. The method is a method for inspecting a refrigerant pipe containing copper or a copper alloy. In the method, the refrigerant pipe is exposed to an aqueous alkaline solution and inspected based on a color change of the refrigerant pipe due to exposure of the refrigerant pipe to the aqueous alkaline solution.

公开(公告)号：US20240318930A1

公开(公告)日：2024-09-26

申请号：US18734392

申请日：2024-06-05

申请人： DAIKIN INDUSTRIES, LTD.

发明人： Mirei KANETAKE ,  Yuuji TANAKA ,  Kunihiro OKADA ,  Hideo OHYA ,  Hideo KATAYAMA ,  Keisuke IMAZU ,  Shouhei ARAKI

IPC分类号： F28F19/02 ,  C09D5/08 ,  F28F1/12 ,  F28F21/08

CPC分类号： F28F19/02 ,  C09D5/086 ,  F28F1/12 ,  F28F21/084

摘要： Provided are a copper-containing refrigerant pipe whose corrosion can be suppressed, a heat exchanger, and a method for producing a refrigerant pipe. A refrigerant pipe includes a pipe body including copper or copper alloy and an anticorrosive film formed on the outer surface of the pipe body. The anticorrosive film is obtained by applying a coating agent to the outer surface of the pipe body. The coating agent contains one or more anticorrosive agents selected from (A) an organic sulfonate compound, (B) a polyhydric alcohol-organic acid ester compound, and (C) an aliphatic amine compound having 8 to 24 carbon atoms. When the coating agent includes an anticorrosive agent of (C) the aliphatic amine compound having 8 to 24 carbon atoms, (C) the aliphatic amine compound having 8 to 24 carbon atoms is included in an amount of 2.0 wt % or more and 10.0 wt % or less in the coating agent.

公开(公告)号：US20210018282A1

公开(公告)日：2021-01-21

申请号：US17043413

申请日：2019-03-28

申请人： DAIKIN INDUSTRIES, LTD.

发明人： Mirei KANETAKE ,  Yuuji TANAKA ,  Kunihiro OKADA ,  Hideo OHYA ,  Hideo KATAYAMA ,  Keisuke IMAZU ,  Shouhei ARAKI

IPC分类号： F28F19/02 ,  C09D5/08 ,  F28F21/08 ,  F28F1/12

摘要： A copper-containing refrigerant pipe having an anticorrosive film, a heat exchanger, and a method for producing the refrigerant pipe are disclosed. The refrigerant pipe includes a pipe body including copper or a copper alloy and an anticorrosive film formed on the outer surface of the pipe body. The anticorrosive film is obtained by applying a coating agent to the outer surface of the pipe body. The coating agent contains one or more anticorrosive agents selected from the group consisting of (A) an organic sulfonate compound, (B) a polyhydric alcohol-organic acid ester compound, and (C) an aliphatic amine compound having 8 to 24 carbon atoms. When the coating agent includes an anticorrosive agent of (C) the aliphatic amine compound having 8 to 24 carbon atoms, (C) the aliphatic amine compound having 8 to 24 carbon atoms is included in an amount of 2.0 wt % or more and 10.0 wt % or less in the coating agent.