Refrigeration – Automatic control – Refrigeration producer
Patent
1996-06-05
1998-01-20
Tanner, Harry B.
Refrigeration
Automatic control
Refrigeration producer
62229, 62230, F25B 4902, B60H 100
Patent
active
057090980
ABSTRACT:
In the cooling operation, it is determined whether supplied electric current (IDC) supplied to an electric motor for driving a compressor is less than a predetermined value or not, that is, whether consumed electric power of the electric motor is less than a predetermined value or not. In the cool-down control, the determination may be "NO", however, in this case an inverter is controlled so that the IDC is set to the predetermined value. Thus, in the present invention, since IDC is always the predetermined value a1 or less and the consumed electric power of the electric motor is always the predetermined value or less, coefficiency of performance (COP) of the refrigerating cycle can be maintained to a predetermined magnitude.
REFERENCES:
patent: 4735058 (1988-04-01), Umezu et al.
patent: 4736595 (1988-04-01), Kato
patent: 5537831 (1996-07-01), Isaji et al.
Iritani Kunio
Itoh Satoshi
Suzuki Takahisa
Takeo Yuji
Nippondenso Co. Ltd.
Tanner Harry B.
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