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:
Jan. 27, 2026
Filed:
May. 13, 2021
Daikin Industries, Ltd., Osaka, JP;
Daikin Europe N.v., Ostend, BE;
Kevin Cornelis, Ostend, BE;
Satoshi Kawano, Osaka, JP;
DAIKIN INDUSTRIES, LTD., Osaka, JP;
DAIKIN EUROPE N.V., Ostend, BE;
Abstract
Provided is a heat pump system having a compressor, a liquid-side on-off valve, a gas-side on-off valve, and a controller. The controller is configured to perform a refrigerant recovery operation for recovering refrigerant from a utilization-side piping section to a heatsource-side piping section by operating the compressor while the liquid-side on-off valve is closed and the gas-side on-off valve is open, and control the system such that the gas-side on-off valve starts closing when a predetermined valve-close condition is satisfied during the compressor is operating for recovering refrigerant, and such that the operation of the compressor for recovering refrigerant stops after the closing of the gas-side on-off valve started.