Title:
TRANSCRITICAL CARBON DIOXIDE SINGLE-STAGE AND DOUBLE-STAGE COMPRESSION HOT WATER SYSTEM AND CONTROL METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/123843
Kind Code:
A1
Abstract:
A transcritical carbon dioxide single-stage and double-stage compression hot water system and a control method therefor. The system comprises a first-stage compressor (1), a first heat exchanger (2) used for exchanging heat with cooling water on a user side, a second-stage compressor (3), a second heat exchanger (4) used for exchanging heat with the cooling water on the user side, a third heat exchanger (5) used for heat exchange between a liquid-phase refrigerant and a gas-phase refrigerant, an expansion valve (6), a fourth heat exchanger (7) used for exchanging heat with ambient air, a buffer water tank (8), a first proportional valve (9), a second proportional valve (10), a third proportional valve (11), a fourth proportional valve (12), a defrosting valve (13), a refrigerant bypass valve (14) and the like. The system achieves intelligent switching between single-stage and double-stage transcritical operation under a variable working condition, has outstanding heating capacities and energy efficiency ratios under all working conditions, improves the comprehensive performance of making high-temperature hot water in a low-temperature environment, and also solves the defrosting problem and the water outlet temperature control problem of double-stage compression hot water systems.
Inventors:
PAN HAO (CN)
XIONG DAN (CN)
TANG XIAOLIANG (CN)
YOU JUN (CN)
KANG QIANG (CN)
SONG XIAOFEI (CN)
XIONG DAN (CN)
TANG XIAOLIANG (CN)
YOU JUN (CN)
KANG QIANG (CN)
SONG XIAOFEI (CN)
Application Number:
PCT/CN2022/095094
Publication Date:
July 06, 2023
Filing Date:
May 26, 2022
Export Citation:
Assignee:
JIANGSU SUJING GROUP CO LTD (CN)
International Classes:
F25B31/00
Foreign References:
| CN114165936A | 2022-03-11 | |||
| CN107726656A | 2018-02-23 | |||
| CN205318743U | 2016-06-15 | |||
| CN110736262A | 2020-01-31 | |||
| CN209605439U | 2019-11-08 | |||
| CN209484873U | 2019-10-11 | |||
| CN207585127U | 2018-07-06 |
Attorney, Agent or Firm:
SUZHOU CREATOR PATENT & TRADEMARK AGENCY, LTD. (CN)
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