HEAT EXCHANGER AND REFRIGERATION CYCLE DEVICE USING HEAT EXCHANGER

Title:

HEAT EXCHANGER AND REFRIGERATION CYCLE DEVICE USING HEAT EXCHANGER

Document Type and Number:

WIPO Patent Application WO/2013/046482

Kind Code:

A1

Abstract:

A heat exchanger has fins which are stacked in the direction perpendicular to the direction of flow of air and a heat transfer pipe (20) which penetrates through the fins and which is joined and affixed to the fins by being expanded in diameter by a pipe expansion method. High protrusions (22A) extending in the axial direction of the heat transfer pipe (20) are provided on the inner surface of the heat transfer pipe (20) so as to be arranged in the circumferential direction. Low protrusions (22B) extending in the axial direction are provided between the high protrusions (22A). After the heat transfer pipe (20) is expanded, the height of the high protrusions (22A) is greater than the height of the low protrusions (22B). The opposing side surfaces of adjacent high and low protrusions (22A, 22B) are formed so as to be tilted so that, after the heat transfer pipe (20) is expanded, lines extended from the side surfaces intersect each other on the inside of the heat transfer pipe (20).

Inventors:

LEE SANGMU (JP)
ISHIKAWA MITSUHIRO (JP)
ISHIBASHI AKIRA (JP)
MATSUDA TAKUYA (JP)

Application Number:

PCT/JP2012/000577

Publication Date:

April 04, 2013

Filing Date:

January 30, 2012

Export Citation:

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Assignee:

MITSUBISHI ELECTRIC CORP (JP)
LEE SANGMU (JP)
ISHIKAWA MITSUHIRO (JP)
ISHIBASHI AKIRA (JP)
MATSUDA TAKUYA (JP)

International Classes:

F28F1/40; F25B39/00; F28F1/32

Domestic Patent References:

WO2009131072A1

2009-10-29

Foreign References:

JPS63290395A	1988-11-28
JP2002081882A	2002-03-22
JPS63172893A	1988-07-16
JP2001289585A	2001-10-19

Other References: