Refrigeration – Processes – Compressing – condensing and evaporating
Patent
1986-11-19
1988-02-16
Wayner, William E.
Refrigeration
Processes
Compressing, condensing and evaporating
622284, 318779, 318807, F25B 100
Patent
active
047246804
ABSTRACT:
An air conditioning apparatus includes a variable frequency power source device for providing an AC electric power with a variable frequency, a variable capacity compressor driven by the AC electric ipower and a starting detector for detecting a starting state of the compressor a predetermined time after the compressor is energized. When the starting detector detects the starting failure of the compressor, the variable frequency power source device feeds the compressor with a starting frequency voltage until the starting detector detects changes in the level of the input current to the compressor within a predetermined time to heat refrigerant in the compressor, and then feeds the compressor with a driving frequency voltage corresponding to the required air conditioning load. When no change in the level of the input current is detected within the predetermined time, the variable frequency power source device supplys the compressor with the driving frequency voltage immediately after the predetermined time elapsed.
REFERENCES:
patent: 4422030 (1983-12-01), McAllise
patent: 4451112 (1984-05-01), Hattori et al.
patent: 4662185 (1987-05-01), Kobayashi et al.
Kabushiki Kaisha Toshiba
Wayner William E.
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