Title:
AIR CONDITIONER
Document Type and Number:
WIPO Patent Application WO/2023/037435
Kind Code:
A1
Abstract:
This air conditioner (100) comprises a compressor (1), a first heat exchanger (2), a second heat exchanger (4), a decompression device (3), a circulation path (5), a temperature sensor (50), a concentration sensor (51), a heater (60), and a control device (70). When the concentration of refrigerator oil detected by the concentration sensor (51) is less than a first threshold, the control device (70) activates the heater (60) so that a portion of a liquid refrigerant inside the compressor (1) is vaporized, and when the concentration of refrigerator oil detected by the concentration sensor (51) exceeds a second threshold that is greater than the first threshold and the temperature of the refrigerator oil detected by the temperature sensor (50) is less than a prescribed temperature, the control device (70) activates the heater (60) so that the liquid refrigerant inside the compressor (1) is vaporized and the temperature of the refrigerator oil inside the compressor (1) rises.
Inventors:
YUASA RYOTA (JP)
ISHIYAMA HIROKI (JP)
SATO MASANORI (JP)
KOSHI SOICHIRO (JP)
ISHIYAMA HIROKI (JP)
SATO MASANORI (JP)
KOSHI SOICHIRO (JP)
Application Number:
PCT/JP2021/032974
Publication Date:
March 16, 2023
Filing Date:
September 08, 2021
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F25B1/00
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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