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:
Sep. 17, 2002
Filed:
Nov. 28, 2000
Kazuya Kimura, Kariya, JP;
Tatsuya Hirose, Kariya, JP;
Masaki Ota, Kariya, JP;
Masahiro Kawaguchi, Kariya, JP;
Naoya Yokomachi, Kariya, JP;
Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Kariya, JP;
Abstract
An air-conditioning system capable of always effectively performing the heating function by selectively using one of a cooling circuit and a heating circuit sharing a variable displacement type compressor is disclosed. An electromagnetic capacity control valve ( ) controls the discharge capacity of a variable displacement type compressor ( ) in response to the differential pressure between the discharge pressure Pd of a discharge chamber ( ) and the suction pressure Ps of a suction chamber ( ). The energization and deenergization of the capacity control valve ( ) is controlled by a control unit ( ). When a cooling command switch ( ) is turned on, the control unit ( ) deenergizes a switching valve ( ) thereby to control the cooling operation while at the same time controlling the discharge capacity by the capacity control valve ( ). When a heating command switch ( ) is turned on, on the other hand, the control unit ( ) energizes the switching valve ( ) thereby to control the heating operation while at the same time controlling the discharge capacity by the capacity control valve ( ).