Title:
REFRIGERATION CYCLE DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/111603
Kind Code:
A1
Abstract:
A refrigeration cycle device (100), in which a refrigerant circulates in the following order: a compressor (1), a first heat exchanger (2), a receiver (3), a pipe (Pp), an expansion valve (4), and a second heat exchanger (5). An observation hole (Ho) is formed in the pipe (Pp). The receiver (3) stores a liquid refrigerant. The refrigeration cycle device (100) comprises a light transmissive member (6), a light detection device (7), and a control device (10). The light transmissive member (6) is disposed in the observation hole (Ho) so as to face the inner wall of the pipe (Pp). The light detection device (7) is disposed outside the pipe (Pp) so as to face the light transmissive member (6) and outputs information relating to the light from inside the pipe (Pp). The control device (10) detects the state of the refrigerant from the receiver (3) using the information relating to the light output from the light detection device (7). If the refrigerant from the receiver (3) is in a gas-liquid two-phase state, the control device (10) reports a shortage of the refrigerant.
Inventors:
ISHIKAWA TOMOTAKA (JP)
NOMOTO SO (JP)
NOMOTO SO (JP)
Application Number:
PCT/JP2019/047683
Publication Date:
June 10, 2021
Filing Date:
December 05, 2019
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F25B49/02
Foreign References:
| JPH06185839A | 1994-07-08 | |||
| JP2005257204A | 2005-09-22 |
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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