Automobile air-conditioner having improved control characteristi

Details Automobile air-conditioner having improved control characteristi Automobile air-conditioner having improved control characteristi

1997-04-30

1998-06-16

Wayner, William E.

Refrigeration

Automatic control

Refrigeration producer

622284, 62229, F25B 4100, F25B 100

Patent

active

057653836

ABSTRACT:
In an automobile air-conditioner comprising a compressor with variable discharge capacity for compressing a refrigerant, an outlet temperature sensor for sensing an outlet temperature at an outlet of at least one of a heat sink and a radiator, a room temperature sensor for sensing a room temperature inside the automobile, an outside air temperature sensor for sensing an outside air temperature outside the automobile, and a room temperature setting unit for setting the room temperature to a desired temperature, a first arithmetic operating unit carries out an arithmetic operation according to at least the room temperature, the outside air temperature, and the desired temperature, to obtain a target temperature. A second arithmetic operating unit predicts the rotation speed of the compressor with a predetermined feed-forward arithmetic expression to obtain a predicted rotation speed. A third arithmetic operating unit carries out an arithmetic operation with an arithmetic feedback control expression including the predicted rotation speed and a deviation between the target temperature and the outlet temperature to obtain the rotation speed of the compressor. The compressor is controlled in accordance with the rotation speed calculated by the third arithmetic operating unit.

REFERENCES:
patent: 5634348 (1997-06-01), Ikeda et al.
patent: 5669226 (1997-09-01), Kurahashi et al..

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