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Title:
HEAT EXCHANGER
Document Type and Number:
WIPO Patent Application WO/2019/058848
Kind Code:
A1
Abstract:
[Problem] To inhibit an increase in costs and the closing of an air duct caused by frost formation, while maintaining heat exchange efficiency. [Solution] The surface area of fins 14 is equal to or greater than the surface area obtained when the extension amount L is set to a reference amount Ls, and the pitch P is set to a reference pitch Ps. Furthermore, the extension amount L is set on the basis of a first change ratio α, i.e. the change ratio of the closing time when the extension amount L is longer than the reference amount Ls, to the closing time when the extension amount L is the reference amount Ls. Moreover, the pitch P is set on the basis of a second change ratio β, i.e. the change ratio of the closing time when the pitch P is longer than the reference pitch Ps to the closing time when the pitch P is the reference pitch Ps.

Inventors:
ISHII YUTAKA (JP)
TOYAMA TAKASHI (JP)
Application Number:
PCT/JP2018/030889
Publication Date:
March 28, 2019
Filing Date:
August 22, 2018
Export Citation:
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Assignee:
SANDEN HOLDINGS CORP (JP)
International Classes:
F28F1/32; B60H1/32; F25B39/02; F28D1/053; F28F1/30; F28F17/00
Domestic Patent References:
WO2013008464A12013-01-17
Foreign References:
JPH06221787A1994-08-12
JPH0829016A1996-02-02
JP2012163323A2012-08-30
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