Refrigeration – Automatic control – Refrigeration producer
Patent
1989-06-20
1991-08-20
Tanner, Harry B.
Refrigeration
Automatic control
Refrigeration producer
62209, 622284, F25D 1702
Patent
active
050403796
ABSTRACT:
A temperature controller is provided for controlling a coolant temperature in a liquid coolant system including a liquid circulation circuit, in which coolant for cooling a machine circulates, and a refrigeration circuit for cooling the coolant. The operating capacity of a compressor of the refrigeration circuit is variably adjusted by an inverter, and when the operating condition of the machine is changed, the frequency value for driving the compressor is varied in accordance with the change. Accordingly, it is possible to immediately correspond to the change of a liquid temperature to be generated in the future. In addition, an appropriate control mode can be selected as a control for varying the frequency in combination with a normal feedback control, such that the liquid temperature may converge on a set value or may be co-changed to a room temperature.
REFERENCES:
patent: 2620635 (1952-12-01), Mautner et al.
patent: 4262491 (1981-04-01), Chorey et al.
patent: 4270361 (1981-06-01), La Barge
patent: 4608833 (1986-09-01), Kountz
Fukunaga Osamu
Tsuda Shozo
Daikin Industries Ltd.
Tanner Harry B.
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