Global patent index - EP 1046869 A1

EP 1046869 A1 2000-10-25 - Refrigeration/air conditioning system

Title (en)

Refrigeration/air conditioning system

Title (de)

Kühl- und Klimatisierungssystem

Title (fr)

Système de réfrigération et d'air conditionné

Publication

EP 1046869 A1 (EN)

Application

EP 00303315 A

Priority

  • EP 00303315 A
  • EP 99303027 A

Abstract (en)

Gaseous carbon dioxide is compressed in a compressor (21) to a pressure and temperature above the critical point. The high pressure gas then enters the gas cooler (22), where its temperature is reduced while maintaining its pressure constant. The gas then enters an expander (23) where the gas is expanded to a lower intermediate pressure and temperature resulting in a formation of a gas/liquid mixture. The mixture enters a combined gas separator/liquid accumulator (24) which separates the gaseous portion of the mixture for recycling prior to the primary compressor and directs the liquid portion to an evaporator (26).

A two-phase mechanical refrigeration system, particularly suitable for operation in accordance with the carbon dioxide trans-critical cycle, utilises energy produced on expansion to pre-compress refrigerant returning to a primary compressor (21), thereby improving the overall performance and efficiency of the system and of the primary compressor (21). The system finds application in refrigeration and air conditioning systems, and in heat pumps.

IPC 1-7 (main, further and additional classification)

F25B 1/10; F25B 9/00; F25B 11/02

IPC 8 full level (invention and additional information)

F25B 1/10 (2006.01); F25B 9/00 (2006.01); F25B 11/02 (2006.01); F25B 40/00 (2006.01)

CPC (invention and additional information)

F25B 9/008 (2013.01); F25B 1/10 (2013.01); F25B 11/02 (2013.01); F25B 40/00 (2013.01); F25B 2309/061 (2013.01); F25B 2400/13 (2013.01); F25B 2400/23 (2013.01)

Citation (search report)

Designated contracting state (EPC)

DE FR

EPO simple patent family

EP 1046869 A1 20001025; EP 1046869 B1 20050202

INPADOC legal status

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