Refrigeration – Automatic control – Refrigeration producer
Patent
1990-11-30
1992-04-07
Tanner, Harry B.
Refrigeration
Automatic control
Refrigeration producer
62DIG17, 165101, F25B 3900
Patent
active
051016400
ABSTRACT:
The present invention provides an air conditioning apparatus for automobiles equipped with a heat exchanger and a control method for the apparatus, by which the heat transfer area of the heat exchanger can be properly controlled to permit a stable cycle operation, even when the capacity of a condenser is relatively overly enhanced under a condition of the low atmospheric temperature. The apparatus and the control method are achieved with such an arrangement that either one or both of headers of a heat exchanger is provided with at least one refrigerant flow rate control valve capable of opening and closing refrigerant passages in each header, the heat exchanger has a refrigerant inlet provided in one header and a refrigerant outlet provided in the other header, and the control valve is opened and closed to change the number of the passages allowing the refrigerant to pass therethrough, for thereby changing the effective heat transfer area for heat exchange dependent on the atmospheric temperature.
REFERENCES:
patent: 3112620 (1963-12-01), Stewart
patent: 3368364 (1968-02-01), Norton et al.
patent: 3370438 (1968-02-01), Hopkinson
patent: 3481152 (1969-12-01), Seeley
patent: 3487642 (1970-01-01), Norton
patent: 3789919 (1974-02-01), Huber
patent: 4136528 (1979-01-01), Vogel et al.
Fukushima Toshihiko
Miyamoto Seigo
Musoh Masanori
Umeda Tomomi
Yamamoto Takatoshi
Hitachi , Ltd.
Sollecito John
Tanner Harry B.
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