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:
Aug. 19, 2025
Filed:
Apr. 21, 2023
Mitsubishi Heavy Industries Thermal Systems, Ltd., Tokyo, JP;
Abstract
An embodiment includes: a cylindrical motor case surrounding a compression mechanism about an axis; a lower case closing an opening of the motor case, fitted to an inner circumferential face of the motor case, and defining an accommodation chamber between the motor case and the lower case where a refrigerant is introduced; a first O-ring provided about the axis at a facing portion where the motor case and the lower case fitted to each other face each other in a plane; and a second O-ring provided about the axis in the facing portion, the first O-ring is provided at a position closer to a starting point on the accommodation chamber side of the facing portion than the second O-ring, the first O-ring has better refrigerant resistance and/or oil resistance than the second O-ring, and the second O-ring has better sealing performance than the first O-ring at a temperature of −20° C. or lower.