Title:
FREEZER
Document Type and Number:
Japanese Patent JP2021143819
Kind Code:
A
Abstract:
To provide a freezer capable of operating so as to prevent a compressor from deviating from an operation range even in a transient state.SOLUTION: A refrigeration device comprises a high-stage refrigeration cycle, a low-stage refrigeration cycle, a cascade heat exchanger that exchanges heat between a first refrigerant flowing through the high-stage refrigeration cycle and a second refrigerant flowing through the low-stage refrigeration cycle, and a control unit that controls the operation of the high-stage refrigeration cycle and the low-stage refrigeration cycle. The control unit adjusts intermediate pressure in a transient state of the high-stage refrigeration cycle and the low-stage refrigeration cycle, to operate the high-stage compressor and the low-stage compressor within an operable range.SELECTED DRAWING: Figure 1
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Inventors:
KOBAYASHI NAOKI
YOSHIDA TAICHI
YOSHIDA TAICHI
Application Number:
JP2021036004A
Publication Date:
September 24, 2021
Filing Date:
March 08, 2021
Export Citation:
Assignee:
MITSUBISHI HEAVY IND LTD
International Classes:
F25B7/00; F25B1/00; F25B1/10
Attorney, Agent or Firm:
Mitsuru Oba
Horikawa Miyuki
Yuko Otake
Yamashita Seiko
Horikawa Miyuki
Yuko Otake
Yamashita Seiko