Title:
DOUBLE-COMPRESSOR AIR-SOURCE COLD-WATER HEAT PUMP UNIT AND CONTROL METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2021/208197
Kind Code:
A1
Abstract:
The present invention relates to a double-compressor air-source cold-water heat pump unit and a control method therefor. The double-compressor air-source cold-water heat pump unit comprises a compressor I and a compressor II; air discharge ports of the compressor I and the compressor II are connected to a port D of a four-way valve by means of an oil separator I and an oil separator II, respectively; a port C of the four-way valve is connected to an inlet of a heat exchanger; an outlet of the heat exchanger is connected to a one-way valve assembly; the one-way valve assembly is further connected to an air supplement system, a first end of a throttling assembly and a first end of a liquid reservoir; the air supplement system is further connected to a second end of the throttling assembly, an air supplement port of the compressor I and an air supplement port of the compressor II; a second end of the liquid reservoir is connected to a port E of the four-way valve by means of a tube shell; a port S of the four-way valve is connected to an inlet of a gas-liquid separator; and an outlet of the gas-liquid separator is connected to a suction port of the compressor I and a suction port of the compressor II. The present invention makes oil returning of compressors more balanced and reliable, and makes air supplement control more accurate and efficient.
Inventors:
YANG YAHUA (CN)
MEI KUI (CN)
SHI QIMING (CN)
WANG FEI (CN)
GUO GANG (CN)
LU HUIXIA (CN)
MEI KUI (CN)
SHI QIMING (CN)
WANG FEI (CN)
GUO GANG (CN)
LU HUIXIA (CN)
Application Number:
PCT/CN2020/092561
Publication Date:
October 21, 2021
Filing Date:
May 27, 2020
Export Citation:
Assignee:
NANJING TICA CLIMATE SOLUTIONS CO LTD (CN)
International Classes:
F25B13/00; F25B31/00; F25B41/34; F25B49/02
Domestic Patent References:
| WO2002039033A1 | 2002-05-16 |
Foreign References:
| CN107990585A | 2018-05-04 | |||
| CN106500391A | 2017-03-15 | |||
| CN106352577A | 2017-01-25 | |||
| CN110848845A | 2020-02-28 | |||
| CN209541217U | 2019-10-25 | |||
| CN107192159A | 2017-09-22 | |||
| JP2005225438A | 2005-08-25 |
Attorney, Agent or Firm:
NANJING TIANHUA PATENT AGENT CO., LTD. (CN)
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