Frequency control apparatus of a multi-refrigeration cycle syste

Details Frequency control apparatus of a multi-refrigeration cycle syste Frequency control apparatus of a multi-refrigeration cycle syste

1988-04-20

1989-05-23

Wayner, William E.

Refrigeration

Automatic control

Refrigeration producer

62215, 622284, F25B 4100

Patent

active

048318361

ABSTRACT:
A frequency control apparatus of a multi-refrigeration cycle is provided with a current sensor to detect a primary current for a motor or a pressure sensor to detect a pressure at the discharge side of a compressor to detect a load in the refrigeration cycle. When a value detected by the sensor is estimated as being lower than a predetermined value range, the frequency of a current to be supplied to the motor is increased, and when the value detect by the sensor is estimated as being higher than the predetermined value range, the frequency is decreased, whereby the rising time of the refrigeration cycle can be shortened. Further, the frequency is determined by a weighted error average value of the difference between target room temperature in the rooms and detected temperature in the rooms to thereby control the multi-refrigeration cycle to provide an appropriate performance.

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patent: 4724680 (1988-02-01), Kawai
patent: 4738118 (1988-04-01), Kanazawa

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