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. 07, 2004
Filed:
Sep. 11, 2003
Takuya Tanihata, Kariya, JP;
Denso Corporation, Kariya, JP;
Abstract
A vapor-compression refrigerant cycle includes a variable displacement compressor for compressing refrigerant, a control unit for controlling the displacement of the compressor. The control unit includes a lock determining means for determining a lock of a sliding portion of the compressor, and the lock determining means determines that the sliding portion of the compressor is locked, when a control signal where the displacement of the compressor is equal to or larger than a predetermined value is output from the control unit, and when an absolute value of a temperature difference between an air temperature before being heat-exchanged in a low-pressure heat exchanger of the vapor-compression refrigerant cycle and the air temperature after being heat-exchanged in the low-pressure heat exchanger is equal to or smaller than a predetermined temperature. Therefore, the lock of the compressor can be accurately detected.