Compressor crankcase heating control systems and methods
First Claim
1. A compressor crankcase heating control method for a heat pump system, the compressor crankcase heating control method comprising:
- selectively actuating a first switching device to connect and disconnect first and second power lines to and from second and third switching devices, respectively,the first and second power lines configured to receive a first voltage; and
when the first and second power lines are disconnected from the second and third switching devices via the first switching device, actuating the second and third switching devices thereby connecting third and fourth power lines to ends, respectively, of at least one winding of a stator of an electric motor of a compressor,the at least one winding of the stator of the electric motor configured to heat the crankcase of the compressor, andthe third and fourth power lines configured to receive a second voltage that is less than the first voltage.
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Abstract
A compressor crankcase heating control method for a heat pump system includes selectively actuating a first switching device to connect and disconnect first and second power lines to and from second and third switching devices, respectively, the first and second power lines receive a first voltage. The compressor crankcase heating control method further includes, when the first and second power lines are disconnected from the second and third switching devices via the first switching device, actuating the second and third switching devices thereby connecting third and fourth power lines to ends, respectively, of at least one winding of a stator of an electric motor of a compressor. The at least one winding of the stator of the electric motor heats the crankcase of the compressor. The third and fourth power lines receive a second voltage that is less than the first voltage.
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Citations
20 Claims
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1. A compressor crankcase heating control method for a heat pump system, the compressor crankcase heating control method comprising:
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selectively actuating a first switching device to connect and disconnect first and second power lines to and from second and third switching devices, respectively, the first and second power lines configured to receive a first voltage; and when the first and second power lines are disconnected from the second and third switching devices via the first switching device, actuating the second and third switching devices thereby connecting third and fourth power lines to ends, respectively, of at least one winding of a stator of an electric motor of a compressor, the at least one winding of the stator of the electric motor configured to heat the crankcase of the compressor, and the third and fourth power lines configured to receive a second voltage that is less than the first voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for a heat pump system, the method comprising:
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selectively actuating a first switching device to connect and disconnect first and second inputs of the first switching device to and from first and second nodes, respectively, the first input of the first switching device connected to a first power line, the second input of the first switching device connected to a second power line, the first and second power lines configured to receive a first voltage; when the first and second inputs are disconnected from the first and second nodes, respectively; actuating a second switching device to connect a third input of the second switching device to a first output of the second switching device, the third input connected to a third power line, and the first output of the second switching device connected to at least one of a first end of a first winding of a stator of an electric motor of a compressor and a first end of a second winding of the stator; and actuating a third switching device to connect a fourth input of the third switching device to a second output of the third switching device, the fourth input connected to a third power line, the third power line configured to receive a second voltage that is less than the first voltage, and the second output of the third switching device connected to second ends of the first and second windings; and when the first and second inputs are connected to the first and second nodes, respectively; actuating the second switching device to connect a fifth input of the second switching device to the first output of the second switching device, the fifth input connected to the first node; and actuating the third switching device to connect a sixth input of the third switching device to the second output of the third switching device, the sixth input connected to the second node. - View Dependent Claims (17, 18, 19, 20)
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Specification