Inverter air conditioner

Details Inverter air conditioner Inverter air conditioner

1992-10-14

1994-12-06

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Compressor protective circuits

H02H 700

Patent

active

053716450

ABSTRACT:
An inverter air conditioner controller includes an ac/dc converter for changing ac power into dc power, a dc/ac inverter for changing dc power into ac power having a desired frequency and a desired voltage to drive a compressor, compressor lock presumption unit for preliminarily determining whether a compressor lock occurs, and frequency increasing unit for increasing an operational frequency to a desired value. When it is presumed that compressor lock occurs, the operational frequency is increased. If the operational current value then reaches an overcurrent detection level, a lock protection unit for activates an overcurrent breaker to stop the compressor.

REFERENCES:
patent: 4736595 (1988-04-01), Kato
Patent Abstracts of Japan, vol. 8, No. 83 (N-290), Apr. 17, 1984, & JP-A-59 000 581, Jan. 5, 1984.
Patent Abstracts of Japan, vol. 15, No. 101 (N-1091), Mar. 11, 1991, & JP-A-30 00 519, Jan. 7, 1991.
Patent Abstracts of Japan, vol. 14, No. 87 (M-937), Feb. 19, 1990, & JP-A-13 00 076, Dec. 4, 1989.

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