Vehicle air conditioning system

Details Vehicle air conditioning system Vehicle air conditioning system

1996-04-30

1997-12-09

Tanner, Harry B.

Refrigeration

Automatic control

Refrigeration producer

62470, 62502, F25B 102

Patent

active

056947844

ABSTRACT:
In a vehicle air conditioning system CO.sub.2 as the refrigerant is compred by an internally controlled swash plate compressor (1) and circulates in a main circuit (2) having at least two heat exchangers (3, 5). An expansion valve (4) subdivides the main circuit (2) into a high and a low pressure part. The capacity control of the swash plate compressor (1) and therefore the air conditioning system takes place by means of a valve (23), which is located in a partial circuit (22) branched from the main circuit (2) by means of a constant choke (21) and which includes the drive chamber (18) of the swash plate compressor (1), so that in the latter it is possible to modify the pressure for adjusting the stroke length of the compressor piston (7). The branching point for the partial circuit (22) is located on an oil separator (20), which is located in the flow direction behind a first heat exchanger (5), so that the swash plate compressor (1) is cooled and is supplied with returned, cooled oil.

REFERENCES:
patent: 4709555 (1987-12-01), Kawai et al.
patent: 4841737 (1989-06-01), Fujii et al.
patent: 4880356 (1989-11-01), Suzuki et al.
patent: 5027612 (1991-07-01), Terauchi
patent: 5205718 (1993-04-01), Fujisawa et al.

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