Refrigeration – Automatic control – Refrigeration producer
Patent
1988-06-14
1989-08-15
Tanner, Harry B.
Refrigeration
Automatic control
Refrigeration producer
622285, 62227, 62244, F25B 100
Patent
active
048562939
ABSTRACT:
An air-conditioning control system for automotive vehicles, comprising a compressor variable in capacity in accordance with a change in suction pressure thereof. A controller is provided which carries out demisting control, on the basis of output signals from various sensors, in such a manner that, when outdoor-air temperature is equal to or lower than a predetermined value and at the same time the air-conditioning control system is in the indoor-air recirculating mode, the suction pressure set by the controller is lowered to a value at which temperature on the outlet side of an evaporator is brought to a value equal to or lower than a predetermined freezing temperature, and when a state in which freezing of the evaporator may occur has continued for a predetermined period of time, the set suction pressure of the compressor is raised until the temperature on the outlet side of the evaporator is brought to a value equal to or higher than a predetermined non-freezing temperature.
REFERENCES:
patent: 4350021 (1982-09-01), Lundstrom
patent: 4561260 (1985-12-01), Nisho et al.
patent: 4646535 (1987-03-01), Matsuoka et al.
patent: 4667480 (1987-05-01), Bessler
Diesel Kiki Co. Ltd.
Tanner Harry B.
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