Title:
HEAT EXCHANGER AND REFRIGERATION CYCLE APPARATUS
Document Type and Number:
WIPO Patent Application WO/2021/079422
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a heat exchanger and a refrigeration cycle apparatus capable of generating a flooding phenomenon in which a liquid refrigerant is moved upward in flat tubes extending in a vertical direction, and capable of, as result of the liquid refrigerant being moved upward easily, exhibiting an inherent heating capacity without hindrance. This heat exchanger is provided with a heat exchange body having a plurality of flat tubes extended in a vertical direction, a gas header that is connected to a lower end part of the heat exchange body and that extends in a horizontal direction, and a liquid header that is connected to the heat exchange body and that extends in a horizontal direction. The heat exchange body is disposed to be inclined by an angle θ with respect to the upward vertical direction when the horizontal direction in which the gas header extends is defined as a start point; the angle θ satisfies 0°<θ<90°. A predetermined formula is satisfied and C≥1.5 is satisfied when C represents a flooding constant [-] that serves as a reference for generating the flooding phenomenon in which the liquid refrigerant is moved upward in the flat tubes extending in the up-down direction, ρL represents a liquid density [kg/m3], ρG represents gas density [kg/m3], g represents a gravitational acceleration [m/s2], D represents a hydraulic diameter [m], vL represents a liquid velocity, and vG represents a gas velocity.
Inventors:
HARA NAOTO (JP)
ONAKA YOJI (JP)
ONAKA YOJI (JP)
Application Number:
PCT/JP2019/041453
Publication Date:
April 29, 2021
Filing Date:
October 23, 2019
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F28F1/34; F28D1/053; F28F9/02
Domestic Patent References:
| WO2018154650A1 | 2018-08-30 |
Foreign References:
| JPH0611280A | 1994-01-21 | |||
| JP2014142165A | 2014-08-07 | |||
| JP2001194081A | 2001-07-17 | |||
| JPS49114145A | 1974-10-31 | |||
| JPS4849054A | 1973-07-11 | |||
| US5771964A | 1998-06-30 |
Attorney, Agent or Firm:
KISA PATENT & TRADEMARK FIRM (JP)
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