Title:
REFRIGERATION CYCLE SYSTEM
Document Type and Number:
WIPO Patent Application WO/2022/044321
Kind Code:
A1
Abstract:
This refrigeration cycle system comprises a measurement means that measures a related physical quantity, which is a physical quantity related to the state of a refrigerant circuit, and a control means that executes an abnormality determination mode. A decompression device can switch between a first decompression quantity state and a second decompression quantity state, in which the decompression quantity is less than the first decompression quantity state. When the abnormality determination mode starts, the control means sets the decompression device to the first decompression quantity state and operates the compressor at a first speed. The control means is configured such that, at a point in time when a first time period has passed from the start of the abnormality determination mode, the control means stores, as a first measurement value, the value of the related physical quantity measured by the measurement means, and then switches the decompression device from the first decompression quantity state to the second decompression quantity state, and stores, as a second measurement value, the value of the related physical quantity measured by the measurement means after the decompression device was switched from the first decompression quantity state to the second decompression quantity state. If a value obtained by subtracting the first measurement value from the second measurement value is greater than a first abnormality determination value, then the control means determines there is an abnormality in the refrigerant circuit, and stops operation of the compressor.
Inventors:
HIROSAKI HIROKI (JP)
Application Number:
PCT/JP2020/032872
Publication Date:
March 03, 2022
Filing Date:
August 31, 2020
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F25B49/02; F25B1/00
Domestic Patent References:
| WO2017042859A1 | 2017-03-16 |
Foreign References:
| JP2014043962A | 2014-03-13 | |||
| JP2015045487A | 2015-03-12 | |||
| JP2011158121A | 2011-08-18 |
Attorney, Agent or Firm:
TAKADA, Mamoru et al. (JP)
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