Title:
BINARY REFRIGERATION DEVICE
Document Type and Number:
Japanese Patent JP2022015253
Kind Code:
A
Abstract:
To provide a binary refrigeration device in which heat exchange amount of a cascade heat exchanger can be adjust while suppressing the occurrence of hunting in a control object.SOLUTION: A binary refrigeration device 100 is provided, comprising a control unit 50 constituted in such a manner that when an absolute value of a first multiplication value of a control gain 62a of the number of revolution of the high-temperature side compressor 21 with respect to the evaporation temperature Te, and a control gain 63a of the opening/closing amount of the high-temperature side expansion valve 23 is larger than (smaller than) an absolute value of a second multiplication value of a control gain 61a of the opening/closing amount of the high-temperature side expansion valve 23 with respect to the evaporation temperature Te and a control gain 64a of the number of revolution of the high-temperature side compressor 21 with respect to the overheat degree Tsh, the control unit 50 controls number of revolution of a high-temperature side compressor 21 and opening/closing amount of a high-temperature side expansion valve 23 (opening/closing amount of the high-temperature side expansion valve 23 and number of revolution of the high-temperature side compressor 21) in order to control evaporation temperature Te and overheat degree Tsh.SELECTED DRAWING: Figure 3
Inventors:
RIKIOKA TOMOKAZU
MIYAKOSHI TOMOYA
MIYAKOSHI TOMOYA
Application Number:
JP2020117963A
Publication Date:
January 21, 2022
Filing Date:
July 08, 2020
Export Citation:
Assignee:
FUJI ELECTRIC CO LTD
International Classes:
F25B7/00; F25B1/00; F25B13/00
Attorney, Agent or Firm:
Hirokazu Miyazono
Tomohiro Mimori
Tomohiro Mimori
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