Air conditioning apparatus for a vehicle

Details Air conditioning apparatus for a vehicle Air conditioning apparatus for a vehicle

1996-07-19

1998-10-13

Doerrler, William

Refrigeration

Reversible, i.e., heat pump

623246, 62160, F25B 2700

Patent

active

058195513

ABSTRACT:
A first heat exchanger implements heat exchange between refrigerant and atmosphere. A second heat exchanger implements heat exchange between the refrigerant and air directed to an interior of the vehicle. A third heat exchanger downstream of the second heat exchanger implements heat exchange between the refrigerant and the air directed to the interior of the vehicle. A four-way valve connected among a refrigerant flow restricting device, the first heat exchanger, the second heat exchanger, and the third heat exchanger for changing a flow path of the refrigerant. A bypass device allows the refrigerant to selectively flow through the second heat exchanger and bypass the second heat exchanger. During a first mode of operation, the refrigerant is circulated sequentially through a compressor, the third heat exchanger, the four-way valve, the first heat exchanger, the refrigerant flow restricting device, the four-way valve, the second heat exchanger, and the compressor. During a second mode of operation, the refrigerant is circulated sequentially through the compressor, the third heat exchanger, the four-way valve, the refrigerant flow restricting device, the first heat exchanger, the four-way valve, the second heat exchanger, and the compressor. During a third mode of operation, the refrigerant is circulated sequentially through the compressor, the third heat exchanger, the four-way valve, the refrigerant flow restricting device, the first heat exchanger, the four-way valve, and the compressor while being allowed by the bypass device to bypass the second heat exchanger.

REFERENCES:
patent: 3460353 (1969-08-01), Ogata et al.
patent: 4098092 (1978-07-01), Singh
patent: 4327561 (1982-05-01), McNeal
patent: 4938032 (1990-07-01), Mudford
patent: 5299431 (1994-04-01), Iritani et al.
patent: 5375427 (1994-12-01), Hara et al.
patent: 5388421 (1995-02-01), Matsuoka

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