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:
Jan. 29, 2002
Filed:
May. 15, 2000
Mannesmann VDO AG, , DE;
Abstract
It is proposed to design a compression-type refrigeration system of a motor-vehicle air-conditioning unit having a supercritical process, with a compressor ( ), driven by an electric motor ( ) with motor-control device ( ), a gas cooler ( ), an expansion member ( ) and an evaporator ( ) and also connecting elements for a circulation of a refrigerant, in such a way that the heat loss of the motor and/or of the motor-control device is essentially dissipated to the refrigerant. In particular, the refrigerant may flow around the motor and/or the motor-control device. This results in especially efficient cooling of the components, as a result of which their heat loss is reduced at the same time. Furthermore, in order to achieve a high efficiency of the entire unit, provision is made for the superheating of the refrigerant at the inlet of the compressor to be kept at a virtually constant level by a controlled expansion member.