Title:
REFRIGERATION AIR CONDITIONING DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/234851
Kind Code:
A1
Abstract:
A refrigeration air conditioning device, according to the present invention, provided with a refrigeration cycle circuit that comprises a compressor, a condenser, a decompression device, refrigerant conduits connecting the condenser and the decompression device, and an evaporator, and that is filled with refrigerant. The refrigerant conduits include an ascending conduit that extends in the up-down direction and through which the liquid refrigerant flowing out from the condenser ascends. The density of a refrigerator oil stored in the compressor is greater than the density of the refrigerant when the latter is in liquid form. When the conduit inner diameter is defined as the inner diameter of the ascending conduit, spherical refrigerator oil is defined as refrigerator oil having a spherical shape and a diameter equal to the conduit inner diameter, and fluid force is defined as force applied to the spherical refrigerator oil by the liquid refrigerant ascending through the ascending conduit, the speed of the liquid refrigerant ascending through the ascending conduit is such that the fluid force is greater than the gravitational force acting upon the spherical refrigerator oil.
Inventors:
YOKOGI TATSUYA (JP)
MAKINO HIROAKI (JP)
MAKINO HIROAKI (JP)
Application Number:
PCT/JP2020/019921
Publication Date:
November 25, 2021
Filing Date:
May 20, 2020
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F25B41/00; F24F11/86; F25B1/00
Domestic Patent References:
| WO2011052038A1 | 2011-05-05 |
Foreign References:
| JP2001272117A | 2001-10-05 | |||
| JP2000088369A | 2000-03-31 | |||
| JP2003214715A | 2003-07-30 | |||
| JP2009243719A | 2009-10-22 |
Attorney, Agent or Firm:
KISA PATENT & TRADEMARK FIRM (JP)
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