Air conditioning unit for motor vehicles and method for its operation

US8037698B2 · kind B2 · utility

Assignee

• Visteon Global Technologies, Inc. · US

Inventors

• Roman Heckt · Aachen, DE
• Marc Graaf · Krefeld, DE
• Tobias Haas · Cologne, DE

Key dates

• Filing date: Jul 17, 2008
• Grant date: Oct 18, 2011
• Expiry date: Apr 9, 2030

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F25B9/008
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

An air conditioning unit is disclosed for motor vehicles. The air conditioning unit includes with a compression refrigerant circuit where a refrigerant circulates, comprising comprehensively switched in series with respect to fluid flow at least one compressor upstream of a heat-delivering heat exchanger, and an expansion element upstream of a heat-absorbing heat exchanger, whereby into the flow path leading from the outlet of the heat-delivering heat exchanger to the expansion element an additional heat exchanger is integrated thermally coupled to at least one cooling means the temperature of which can be put to values below the temperature of the refrigerant in the compression refrigeration circuit at the position of the refrigerant's outflow from the heat-delivering heat exchanger, and a method for its operation.