Air conditioner with internal heat exchanger and method of making same

US6434972B1 · kind B1 · utility

Assignee

• Behr GmbH & Co. · DE

Inventors

• Wolfgang Geiger · Plankstadt, DE
• Hans-Joachim Krauss · Stuttgart, DE
• Michael Sickelmann · Stuttgart, DE
• Karl-Heinz Staffa · Stuttgart, DE
• Christoph Walter · Stuttgart, DE
• Hagen Mittelstrass · Nagold, DE

Key dates

• Filing date: Sep 20, 2000
• Grant date: Aug 20, 2002
• Expiry date: Oct 28, 2020

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F25B2309/06
• WIPO field: Thermal processes and apparatus
• WIPO sector: Mechanical engineering

Abstract

The invention relates to an air conditioner with a refrigerant loop containing a compressor, an evaporator, an accumulator positioned on the low-pressure side between the evaporator and the compressor, and an internal heat exchanger with a high-pressure side heat transfer channel and a low-pressure side heat transfer channel. According to the invention, the internal heat exchanger has a multichannel tube wound into a radial spiral or a meander shape. In addition or alternatively, the internal heat exchanger contains a multichannel tube which is positioned in the air current path of a cool air current of a high-pressure side condenser/gas cooler. Utilization, for example as a CO2 air conditioner in motor vehicles.