Title:
WIDE-RANGE LOW-TEMPERATURE REFRIGERATION SYSTEM FOR TEST CHAMBER
Document Type and Number:
WIPO Patent Application WO/2022/116133
Kind Code:
A1
Abstract:
A wide-range low-temperature refrigeration system for a test chamber. The system comprises a high-temperature stage unit (2), a low-temperature stage unit (1), and a refrigerating unit (3) for cascade refrigeration, and a cooling water circulation assembly (4) in communication with each of the units. A condensing evaporator (24) is provided between the high-temperature stage unit (2) and the low-temperature stage unit (1). An intermediate-temperature evaporator (23) is provided between the refrigerating unit (3) and the high-temperature stage unit (2). A type-D evaporator (15) is provided between the refrigerating unit (3) and the low-temperature stage unit (1). The high-temperature stage unit (2) comprises N type-G compressors (201) connected in parallel, suction ends of the N type-G compressors (201) are respectively in communication with a type-G suction manifold (203), and exhaust ends thereof are respectively in communication with a type-G exhaust manifold (233). A direct switching valve (206) and a bypass three-way switching valve (207) are disposed on the type-G suction manifold (203) and the type-G exhaust manifold (233), respectively, between the first N1 type-G compressors (201) and the last N2 type-G compressors (201), wherein N = N1 + N2, N1 ≤ N2, and a corner valve side of the bypass three-way switching valve (207) is in communication with the type-G suction manifold (203). The invention reduces the pressure ratio, improves the operation efficiency and safety, and facilitates acquisition of a lower temperature.
Inventors:
HU CHUN (CN)
CHEN BIN (CN)
ZHANG MIN (CN)
LI JIE (CN)
HE XIUMING (CN)
HUANG TAO (CN)
LIANG LIFENG (CN)
YANG ZHIFENG (CN)
CHEN BIN (CN)
ZHANG MIN (CN)
LI JIE (CN)
HE XIUMING (CN)
HUANG TAO (CN)
LIANG LIFENG (CN)
YANG ZHIFENG (CN)
Application Number:
PCT/CN2020/133803
Publication Date:
June 09, 2022
Filing Date:
December 04, 2020
Export Citation:
Assignee:
SUZHOU ELECTRICAL APPARATUS SCIENCE RES INSTITUTE CO LTD (CN)
International Classes:
F25B49/02; F25B39/00; F25B41/00
Domestic Patent References:
WO2009062526A1 | 2009-05-22 |
Foreign References:
CN202869066U | 2013-04-10 | |||
CN203454447U | 2014-02-26 | |||
CN101576327A | 2009-11-11 | |||
CN207515267U | 2018-06-19 | |||
JP5819006B2 | 2015-11-18 | |||
CN105758047A | 2016-07-13 | |||
CN207674762U | 2018-07-31 |
Attorney, Agent or Firm:
CENTRAL SOUTH WELL INTELLECTUAL PROPERTY OFFICE (CN)
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