Air conditioning installation, especially for a motor vehicle

Details Air conditioning installation, especially for a motor vehicle Air conditioning installation, especially for a motor vehicle

1996-12-19

1998-02-24

Tanner, Harry B.

Refrigeration

Automatic control

Of external fluid or means

236 493, 454258, 454 75, 165248, B60H 300

Patent

active

057201811

ABSTRACT:
A motor vehicle air conditioning system includes an adjustable position air inlet valve for controlling the relative proportions of recirculated air and fresh air from outside entering the system. A first sensor and a second sensor give respective measurement signals representing the inside temperature of the cabin and the outside temperature. The occupant of the vehicle can set a required value of inside temperature on a data unit, which memorizing this setting. The installation includes a processor for computing the difference between the actual inside temperature and its required value, and for memorizing at least one first temperature threshold value. The processor makes a first comparison between this first threshold value and the computed absolute value of the temperature difference, and then performs a second comparison between the inside and outside temperatures. The installation also includes control means for positioning the air inlet valve as a function at least of the first and second comparisons: this enables the temperature inside the cabin to be adjusted.

REFERENCES:
patent: 4917293 (1990-04-01), Fedter et al.
patent: 4996849 (1991-03-01), Burst et al.
patent: 5301515 (1994-04-01), Iritani et al.
patent: 5590540 (1997-01-01), Ikeda et al.
French Search Report dated 27 Sep. 1996.

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