HEAT EXCHANGER

Japanese Patent JP2017125634

A

PROBLEM TO BE SOLVED: To provide a heat exchanger capable of suppressing production of defective articles during processing even with a reduced diameter or thickness of a heat transfer pipe and having improved assemblability without requiring reduction of an outer diameter of a connection pipe.SOLUTION: A heat exchanger has a connection portion B connecting a heat transfer pipe 2 penetrating through a plurality of fins 1 stacked at prescribed intervals in a stacking direction and having a projecting portion 21 projecting from an end portion of the stack of the fins, with a connection pipe 4 connected to the projecting portion of the heat transfer pipe. The connection portion includes a connection pipe surrounding member 6 having a pipe surrounding portion 21a receiving a tip of the connection pipe and surrounding the outer periphery thereof, and a flare-shaped portion 21b disposed on a pipe receiving-side end portion connected to the pipe surrounding portion and formed by an expanded pipe; and an expanded pipe portion protection member 5 in intimate contact with an outer peripheral face of the pipe surrounding portion of the connection pipe surrounding member and restricting a pipe expansion dimension in a radial direction of the pipe surrounding portion.SELECTED DRAWING: Figure 1

JP5058558	How to assemble a pyrolysis furnace tube
JP6021081	A refrigerating cycle device provided with a fin tube heat exchanger and it

YONEDA NORIHIRO
HAYASHI TOMOYUKI

JP2016003994A

July 20, 2017

January 13, 2016

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MITSUBISHI ELECTRIC CORP

F28D1/047; B21D19/08; B21D39/06; B21D53/08; F28F1/32; F28F9/26

JPH043893A	1992-01-08
JPS57144895A	1982-09-07
JPS5323061U	1978-02-27
JP2015064159A	2015-04-09
JPH05288052A	1993-11-02
JP2011027346A	2011-02-10

EP0538846A1	1993-04-28
KR101564586B1	2015-11-03

Takenaka Ikuo
Masuo Oiwa
Keigo Murakami
Kenji Yoshizawa

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