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:
Jun. 28, 2005
Filed:
Oct. 14, 2002
Peter Horstmann, Leonberg, DE;
Stephan Leuthner, Stuttgart, DE;
Peter Satzger, Korntal, DE;
Gernot Mall, Pforzheim, DE;
Petra Kanters, Stuttgart, DE;
Peter Horstmann, Leonberg, DE;
Stephan Leuthner, Stuttgart, DE;
Peter Satzger, Korntal, DE;
Gernot Mall, Pforzheim, DE;
Petra Kanters, Stuttgart, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The invention relates to an air-conditioning unit () for a motor vehicle with a heating heat transfer unit () connected to a coolant circuit () in an internal combustion engine and comprising an evaporator () installed upstream in the direction of flow of a fan (). A compressor () in a refrigerant circuit () pumps a refrigerant through a gas cooler () and an expansion valve () during a cooling operation, and pumps said refrigerant to the evaporator () via the expansion valve () by by-passing the gas cooler () during a heating operation. A coupled heat exchanger () is provided between the coolant circuit () and the refrigerant circuit (). The invention provides that the coupled heat exchanger () is located in the refrigerant circuit () on the pressure side of the compressor () upstream of the gas cooler (), a first by-pass line () is provided parallel to the gas cooler () and the flow through the gas cooler () and the first by-pass line () is controlled by a switching valve () in the first by-pass line () and a switching valve () located at each of the inlet and outlet of the gas cooler (), depending on operating parameters, and a heat transfer unit () for a medium in a unit in the refrigerant circuit () is connected behind an expansion valve (or) and serves as heat source in heating operation.