Air conditioning apparatus and control method thereof
First Claim
1. An air conditioning apparatus comprising:
- variable capacity compressor means for compressing refrigerant;
starting detector means for detecting the starting state of the compressor means after a predetermined starting interval; and
means for maintaining the voltage to the compressor means at a specified starting frequency level in response to the detection result of the starting detector means within a predetermined time.
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Accused Products
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.
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Citations
15 Claims
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1. An air conditioning apparatus comprising:
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variable capacity compressor means for compressing refrigerant; starting detector means for detecting the starting state of the compressor means after a predetermined starting interval; and means for maintaining the voltage to the compressor means at a specified starting frequency level in response to the detection result of the starting detector means within a predetermined time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An air conditioning apparatus comprising:
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variable capacity compressor means for compressing refrigerant; starting current detector means for detecting changes of more than a preset amount in the level of the input current to the compressor means; and means for maintaining the voltage to the compressor means at a specified starting frequency level in response to the detection result of the starting current detector means.
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13. A method for controlling an air conditioning apparatus, having a compressor motor and a counter, comprising the steps of:
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supplying a starting frequency voltage to the compressor motor; generating a time counting output with the counter; detecting the input current to the motor after a predetermined starting interval; maintaining the starting frequency voltage to the compressor motor at a specified frequency level when the level of the input current detected is larger than a predetermined current level; and changing the voltage to the motor from the starting frequency voltage to a different driving frequency voltage, greater than the starting frequency voltage, corresponding to a required air conditioning load when either the time counting output of the counter achieves a predetermined value or the level of the input current detected is less than the predetermined current level. - View Dependent Claims (14)
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15. A method for controlling an air conditioning apparatus, having a compressor motor and a counter, comprising the steps of:
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supplying a starting frequency voltage to the compressor motor; generating a time counting output with the counter; detecting the input current to the motor after a predetermined starting interval; resetting the counter when the input current detected is less than the predetermined current level; and changing the voltage to the motor from the starting frequency voltage to a different driving frequency voltage, greater than the starting frequency voltage, corresponding to a required air conditioning load.
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Specification