Refrigeration – Automatic control – Diverse – cascade or compound refrigeration-producing system
Patent
1991-04-24
1992-12-15
Sollecito, John
Refrigeration
Automatic control
Diverse, cascade or compound refrigeration-producing system
622284, 62510, 417 3, 236 1EA, F25B 700
Patent
active
051706369
ABSTRACT:
A heat exchanger includes a rotary compressor having two compression pumps and a motor for driving the compressor pumps, a condenser connected to the rotary compressor, a regulator connected to the condenser and with an evaporator connected to the regulator. An electric power is supplied from an inverter circuit to the motor of the rotary compressor. The output frequency of the inverter circuit is controlled by a frequency controlling device according to a heat load of a heat exchange circuit subjected. The rotary compressor is operated according to a parallel operation pattern in which the two compression pumps are actuated or a single operation pattern in which a single compression pump is actuated. Either one of the two operation patterns is selected by a selecting device according to the operational condition of the heat exchanger. The switching between the single operation and the parallel operation is performed by a switching device according to the output signal of the selecting device.
REFERENCES:
patent: 4502842 (1985-03-01), Currier
patent: 4526513 (1985-07-01), Bogel
patent: 4787211 (1988-11-01), Shaw
Kabushiki Kaisha Toshiba
Sollecito John
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