| 摘要 |
PROBLEM TO BE SOLVED: To provide the connection structure of a tubular member where the end part of the tubular member being connected to a hollow member does not project into the hollow member and a brazing material or the like for joining does not flow into the hollow member, its pipe connection part formation method, and a fluid shunt using the connection structure. SOLUTION: The connection structure of a tubular member for connecting a tubular member for the inflow or outflow of fluid to a hollow member for circulating the fluid inside is provided with a pipe connection part consisting of an extension part being extended in a tubular shape from the specific part of the hollow member to the outside and a pipe-spreading part where an inner diameter has been expanded so that the end part of the tubular member can be inserted at the tip side of the extension part. As a result, when the tubular member is inserted into the pipe connection part of the hollow member, the insertion of the tubular member is suppressed by the level difference in a diameter direction between the inner surface of the pipe- spreading part and that of the extension part, thus preventing the end part of the tubular member from projecting into the hollow member and a brazing material or the like for joining from flowing into the hollow member.
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