Title:
HEAT EXCHANGER, REFRIGERATION CYCLE DEVICE, AND AIR CONDITIONING DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/180817
Kind Code:
A1
Abstract:
This heat exchanger comprises a heat exchanger body having: a heat transmission pipe through which a fluid passes and which has a groove formed in the inner surface thereof, the groove being a recess spirally extending in the direction of the pipe axis; and a fin that is in contact with the heat transmission pipe to promote heat exchange of the fluid. If a flow path length L, which is the length of the heat transmission pipe, from the heat exchanger inlet to the heat exchanger outlet between which the fluid flows, is not greater than 10 m, the lead angle θ formed between the pipe axis and the groove satisfies 25°≤θ≤45°, and if the flow path length L is greater than 10 m, the lead angle θ satisfies 5°≤θ<25°.
Inventors:
UGAJIN YUKI (JP)
Application Number:
PCT/JP2018/011044
Publication Date:
September 26, 2019
Filing Date:
March 20, 2018
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F25B39/00; F28D1/04; F28F1/40; F28F13/02
Domestic Patent References:
| WO1996012151A1 | 1996-04-25 |
Foreign References:
| JP2013134024A | 2013-07-08 | |||
| JPH11264630A | 1999-09-28 | |||
| JP2009133500A | 2009-06-18 | |||
| JP2005195192A | 2005-07-21 | |||
| JPH0712483A | 1995-01-17 | |||
| JP2015169363A | 2015-09-28 | |||
| JP2004301495A | 2004-10-28 |
Other References:
See also references of EP 3770535A4
Attorney, Agent or Firm:
KISA PATENT & TRADEMARK FIRM (JP)
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