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:
May. 07, 1991
Filed:
Mar. 05, 1990
Yasuji Tamura, Ojima, JP;
Sanden Corporation, Gunma, JP;
Abstract
The present invention is directed to a heat sink for a control device in an electric circuit of an automobile air conditioning system. The control device includes a power transistor which varies the amount of electric power supplied to a motor, so as to vary the rotational speed of the motor in response to demand. The motor drives a compressor of a refrigerant circuit in order to change the driving condition of the compressor in response to change in the rotational speed thereof. The power transistor is fixedly attached to an exterior surface of an evaporator which is the coolest element of the refrigerant circuit in order to provide cooling therefor. Thus, an excessive rise in temperature of the power transistor is prevented without impeding the flow of air in a duct which conducts air from the evaporator to a passenger compartment and without complicating the process of assembling the refrigerant circuit of the automobile air conditioning system.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile