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:
Oct. 18, 1994
Filed:
May. 25, 1993
Junichiro Hara, Yokohama, JP;
Takayoshi Matsuoka, Yokosuka, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
A heat pump type air conditioner for an automotive vehicle has a compressor whose outlet is connected to a condenser and a heat-radiating inner heat exchanger through a three-way valve. The heat-radiating inner heat exchanger is connected to an evaporator through an expansion valve. The evaporator is connected to an inlet of the compressor. During a cooling operation, the three-way valve is set to lead the refrigerant from the compressor to the condenser. During a heating operation, the three-way valve is set to lead the refrigerant from the compressor to the heat-radiating inner heat exchanger while bypassing the condenser. A control unit controls such that a cooling efficiency of the condenser is lowered for a predetermined time when the compressor is started. Therefore, the heating operation is securely implemented, and a start-up period in starting is shortened. Furthermore, the freezing of the condenser is avoided.