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:
Dec. 16, 2025
Filed:
Feb. 18, 2022
Mitsubishi Heavy Industries Thermal Systems, Ltd., Tokyo, JP;
Nobuki Oka, Tokyo, JP;
Ryo Kamito, Tokyo, JP;
Yoshiaki Ito, Tokyo, JP;
Taichi Yoshii, Tokyo, JP;
Tatsuo Ishiguro, Tokyo, JP;
Yoshie Togano, Tokyo, JP;
Norihisa Horaguchi, Tokyo, JP;
Masahiko Nagai, Tokyo, JP;
Naoya Miyoshi, Tokyo, JP;
Abstract
An a purge device that includes an air purge pipe connected to a condenser and configured to extract a mixed gas containing a refrigerant gas and air from the condenser; a separation film provided to the air purge pipe and configured to separate, by a pressure difference, air from the mixed gas extracted by the air purge pipe; an exhaust pipe configured to externally guide a gas containing air separated by the separation film; a first valve provided to the exhaust pipe; a vacuum pump provided downstream of the first valve in the exhaust pipe and configured to externally discharge a gas present inside the exhaust pipe; and a control unit, the control unit activates the vacuum pump, opens the first valve, then closes the first valve to stop permeation of air caused by a pressure difference when detecting that a predetermined amount of air has permeated the separation film.