Compressor unit and refrigerator using the unit
First Claim
1. A compressor unit comprising a compressor, an inverter for driving the compressor, and an over-current protective device for protecting the inverter against an output over-current, the compressor unit characterized in that a working current value of the over-current protective device has temperature characteristics varying according to an ambient temperature, the compressor unit further comprising:
- a temperature sensor (for detecting the ambient temperature, and a control part for controlling an output voltage of the inverter on occasion of start of the compressor on basis of the ambient temperature detected by the temperature sensor.
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Accused Products
Abstract
A compressor unit includes a compressor, an inverter for driving the compressor, and an over-current protective device for protecting the inverter against an output over-current. A control part controls the output voltage of the inverter when the compressor is started based on a ambient temperature detected by a temperature sensor so that the input current of the inverter does not exceed the working current value of the over-current protective device having temperature characteristics varying according to the ambient temperature. Thereby, a start torque can be increased by increasing the output voltage of the inverter without operating the over-current protective device when the compressor is stated at a low temperature when a start load is increased.
56 Citations
4 Claims
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1. A compressor unit comprising a compressor, an inverter for driving the compressor, and an over-current protective device for protecting the inverter against an output over-current,
the compressor unit characterized in that a working current value of the over-current protective device has temperature characteristics varying according to an ambient temperature, the compressor unit further comprising: -
a temperature sensor (for detecting the ambient temperature, and a control part for controlling an output voltage of the inverter on occasion of start of the compressor on basis of the ambient temperature detected by the temperature sensor. - View Dependent Claims (2, 3, 4)
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Specification