Air-mix door control apparatus for an air conditioner for automo

Automatic temperature and humidity regulation – Mixing fluid of dissimilar temperature – Plenum type

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236 49, 165 16, G05D 2300

Patent

active

046977341

ABSTRACT:
An air-mix door control apparatus for an air conditioner of an automobile wherein an opening range of the air-mix door divides into three ranges on the basis of the relationship between the change ratio of opening of the air-mix door and the change ratio of the discharge air temperature. In the range where the change ratio of the discharge air temperature is great, the voltage applied to the air-mix control motor is changed over to a low voltage, in the range where the change ratio of the discharge air temperature is small, the voltage applied to the air-mix control motor is changed over to a high voltage. In the range where the change ratio of the discharge air temperature with respect to the change of opening of the air-mix door is great, changing of the air-mix door can be prevented. In the range where the change ratio of discharge air temperature with respect to the change of opening of the air-mix door is small, the responsiveness of the air-mix door can be improved.

REFERENCES:
patent: 4487254 (1984-12-01), Hayashibara
patent: 4585163 (1986-04-01), Cooley et al.
patent: 4607789 (1986-08-01), Bowman

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