Refrigerant cycle system
First Claim
1. A refrigerant cycle system comprising:
- an electric compressor that includes a compression mechanism, which sucks and compresses refrigerant, and an electric motor, which drives the compression mechanism and is cooled by the refrigerant at a suction side of the compression mechanism;
a variable throttle mechanism that decompresses the refrigerant discharged from the electric compressor;
a motor temperature detector that detects a temperature of the electric motor;
a motor protection determiner that determines whether the temperature of the electric motor detected by the motor temperature detector is equal to or higher than a criterion value; and
a motor protection controller that controls the variable throttle mechanism so that opening degree of the variable throttle mechanism does not decrease when the motor protection determiner determines that the temperature of the electric motor is equal to or higher than the criterion value.
1 Assignment
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Accused Products
Abstract
In a refrigerant cycle system, a compression mechanism of an electric compressor sucks and compresses refrigerant, and an electric motor that drives the compression mechanism is cooled by the refrigerant. A variable throttle mechanism decompresses the refrigerant discharged from the electric compressor. A motor temperature detector detects a temperature of the electric motor. A motor protection determiner determines whether the temperature of the electric motor detected by the motor temperature detector is equal to or higher than a criterion value. A motor protection controller controls the variable throttle mechanism so that an opening degree of the variable throttle mechanism does not decrease when the motor protection determiner determines that the temperature of the electric motor is equal to or higher than the criterion value.
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Citations
11 Claims
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1. A refrigerant cycle system comprising:
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an electric compressor that includes a compression mechanism, which sucks and compresses refrigerant, and an electric motor, which drives the compression mechanism and is cooled by the refrigerant at a suction side of the compression mechanism; a variable throttle mechanism that decompresses the refrigerant discharged from the electric compressor; a motor temperature detector that detects a temperature of the electric motor; a motor protection determiner that determines whether the temperature of the electric motor detected by the motor temperature detector is equal to or higher than a criterion value; and a motor protection controller that controls the variable throttle mechanism so that opening degree of the variable throttle mechanism does not decrease when the motor protection determiner determines that the temperature of the electric motor is equal to or higher than the criterion value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification