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:
Jul. 01, 2003
Filed:
Dec. 04, 2001
Nobuhiko Suzuki, Konan, JP;
Zexel Valeo Climate Control Corporation, Saitama, JP;
Abstract
Variable-capacity control is reliably carried out without using a large pressure control valve while maintaining sufficient pressure resistance in a refrigerating cycle in which carbon dioxide is used as its coolant. A pressure sensor for measuring the pressure on the low pressure side of this refrigerating cycle is used. The electromagnetic coil of the pressure control valve is controlled so that the measured pressure approaches the target value. Low pressure is applied equally to both ends in the direction of movement of the valve disc of the pressure control valve, so that the valve disc can be moved by a light load, and hence the size of the electromagnetic coil can be small.