Title:
CONTROL DEVICE FOR REFRIGERATION CYCLE DEVICE, OUTDOOR UNIT, AND REFRIGERATION CYCLE DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/170848
Kind Code:
A1
Abstract:
An operation control unit of a control device of this refrigeration cycle device replaces a compressor OFF value with a value less than a preset outside air temperature lower limit if, after an evaporation temperature has reached an evaporation temperature target value, an outside air temperature satisfies an ultra-low outside air condition lower than a low outside air condition and is lower than a low-temperature control environment threshold. The low-temperature control environment threshold is a value that is lower than the evaporation temperature target value and lower than an ultra-low outside air condition threshold, which is a determination threshold for the ultra-low outside air condition. The operation control unit continues the operation of the compressor if, after the compressor OFF value has been replaced, the evaporation temperature is higher than the compressor OFF value after replacement. The operation control unit stops the operation of the compressor if, after the compressor OFF value has been replaced, the evaporation temperature is equal to or less than the compressor OFF value after replacement. The operation control unit resumes the operation of the compressor if, after the operation of the compressor has been stopped, both a first condition that "evaporation temperature > compressor OFF value after replacement" and a second condition that "a set period of time, set in advance, has elapsed after the operation of the compressor was stopped" are satisfied, or the evaporation temperature is higher than the compressor OFF value after replacement and is at least equal to a first threshold, which is a temperature lower than the ultra-low outside air condition threshold.
Inventors:
UEDA KOHEI (JP)
ARII YUSUKE (JP)
IKEDA TAKASHI (JP)
ARII YUSUKE (JP)
IKEDA TAKASHI (JP)
Application Number:
PCT/JP2022/010484
Publication Date:
September 14, 2023
Filing Date:
March 10, 2022
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F25D13/00; F25B1/00
Foreign References:
| JP2007278659A | 2007-10-25 | |||
| JPH11294876A | 1999-10-29 | |||
| JP2002013858A | 2002-01-18 | |||
| JP2010105466A | 2010-05-13 | |||
| JP2002061925A | 2002-02-28 | |||
| JP2019066068A | 2019-04-25 |
Attorney, Agent or Firm:
KISA PATENT & TRADEMARK FIRM (JP)
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