The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 12, 2026
Filed:
May. 26, 2022
Jiangsu Sujing Group Co., Ltd., Suzhou, CN;
Hao Pan, Suzhou, CN;
Dan Xiong, Suzhou, CN;
Xiaoliang Tang, Suzhou, CN;
Jun You, Suzhou, CN;
Qiang Kang, Suzhou, CN;
Xiaofei Song, Suzhou, CN;
JIANGSU SUJING GROUP CO., LTD., Suzhou, CN;
Abstract
A hot water system with transcritical carbon dioxide single-stage or double-stage compression and a control method therefor is provided. The hot water system includes a first-stage compressor, a first heat exchanger for exchanging heat with cooling water on user side, a second-stage compressor, a second heat exchanger for exchanging heat with the cooling water on user side, a third heat exchanger for exchanging heat between a liquid phase refrigerant and a gas phase refrigerant, an expansion valve, a fourth heat exchanger for exchanging heat with ambient air, a buffer water tank, a first proportional valve, a second proportional valve, a third proportional valve, a fourth proportional valve, a defrosting valve, and a refrigerant circuit bypass valve. The hot water system can switch between the single-stage compression ad the double-stage compression in high-temperature and low-temperature weather, ensuring that the system has good heating capacity and energy efficiency ratio.