Title:
HEAT EXCHANGER, AND HEAT PUMP DEVICE AND COOLING DEVICE USING SAME
Document Type and Number:
WIPO Patent Application WO/2018/154882
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a heat exchanger which suppresses the deterioration of evaporation heat transfer performance due to dry-out occurring in a transition region from a slug flow of a refrigerant in a heat transfer tube (30) to an annular flow. An indoor heat exchanger (1) according to the present invention has the heat transfer tube (30) which allows the refrigerant to flow in a straight line. A heat exchange suppressing region, which suppresses the heat exchange of the refrigerant, is provided in the intermediate section in the conduit direction of the heat transfer tube (30). This heat exchange suppressing region is formed by shielding the air passage passing outside the heat transfer tube (30).
Inventors:
ENDOH KAZUHIRO (JP)
Application Number:
PCT/JP2017/041293
Publication Date:
August 30, 2018
Filing Date:
November 16, 2017
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
F28F13/06; F25B39/02
Foreign References:
| JP2015210030A | 2015-11-24 | |||
| JP2009021404A | 2009-01-29 | |||
| JP2013245875A | 2013-12-09 |
Other References:
SAITOH, SHIZUO: "Effect of tube diameter on boiling heat transfer of R-134a in horizontal small-diameter tubes", INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, vol. 48, 9 August 2005 (2005-08-09), pages 4973 - 4984, XP005088867
SAITOH, SHIZUO: "Effects of Pipe Diameter on Boiling Heat Transfer of HFC-134a Refrigerant inside Horizontal Smooth Pipe", GRADUATE SCHOOL OF FRONTIER SCIENCES
SAITOH, SHIZUO: "Effects of Pipe Diameter on Boiling Heat Transfer of HFC-134a Refrigerant inside Horizontal Smooth Pipe", GRADUATE SCHOOL OF FRONTIER SCIENCES
Attorney, Agent or Firm:
ISONO INTERNATIONAL PATENT OFFICE, P.C. (JP)
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