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:
Apr. 24, 2007
Filed:
Dec. 16, 2003
Masaki Ota, Kariya, JP;
Tomoji Tarutani, Kariya, JP;
Hisato Kawamura, Kariya, JP;
Yoshinori Inoue, Kariya, JP;
Masahiro Kawaguchi, Kariya, JP;
Masaki Ota, Kariya, JP;
Tomoji Tarutani, Kariya, JP;
Hisato Kawamura, Kariya, JP;
Yoshinori Inoue, Kariya, JP;
Masahiro Kawaguchi, Kariya, JP;
General Electric Company, Schenectady, NY (US);
Abstract
A vehicle air conditioning apparatus includes a refrigerant circulation circuit. The vehicle air conditioning apparatus has a variable displacement type compressor, a first pressure monitoring point, a second pressure monitoring point and an oil separator in the refrigerant circulation circuit. Also, the vehicle air conditioning apparatus has a control valve in the compressor. The compressor compresses refrigerant gas. Displacement of the compressor is variable. The refrigerant gas includes oil. The second pressure monitoring point is located more downstream than the first pressure monitoring point. The control valve controls the displacement based on differential pressure between the first and second pressure monitoring points. The oil separator is located between the first and second pressure monitoring points in order to separate the oil from the compressed refrigerant gas, thereby the oil separator serves as means for manifesting the differential pressure.