Refrigeration control system and method
First Claim
1. A controller for a refrigerating device including a compressor, comprising:
- means for detecting a temperature in a compartment of the refrigerating device;
means for detecting a voltage of a power supply feeding power to the compressor;
processing means for;
(1) comparing the temperature detected by the temperature detecting means with a set temperature, (2) comparing the power supply voltage detected by the voltage detecting means with a reference voltage,(3) generating a drive signal when the detected temperature is higher than the set temperature and the power supply voltage is no lower than the reference voltage, (4) determining whether the compressor has started successfully, (5) halting the drive signal when the processing means senses that the compressor has not started successfully and (6) increasing the reference voltage by and additional amount from the previously increased reference voltage each time the drive signal is halted in response to the halting function; and
means for driving the compressor in response to the drive signal.
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Accused Products
Abstract
A compressor controller of a refrigerating device comprises a power supply voltage detecting device, a voltage comparing device, and a compressor driving device. When the temperature in a compartment of the refrigerating device rises and the compressor is required to be driven to cool the compartment, the power supply voltage detecting device detects the voltage of the power supply which feeds power to the compressor. The voltage comparing device compares the power supply voltage with a reference voltage. When the power supply voltage is no lower than the reference voltage, the compressor driving device starts the compressor. The compressor controller also includes a compressor starting condition detecting device, a compressor halting device, and a voltage compensating device. The compressor starting condition detecting device detects the starting condition of the compressor by detecting the voltage or the current which is fed to the compressor by the power supply. When a compressor starting failure is detected, the compressor halting device halts the compressor immediately. Further, the voltage compensating device increases the reference voltage.
115 Citations
13 Claims
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1. A controller for a refrigerating device including a compressor, comprising:
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means for detecting a temperature in a compartment of the refrigerating device; means for detecting a voltage of a power supply feeding power to the compressor; processing means for;
(1) comparing the temperature detected by the temperature detecting means with a set temperature, (2) comparing the power supply voltage detected by the voltage detecting means with a reference voltage,(3) generating a drive signal when the detected temperature is higher than the set temperature and the power supply voltage is no lower than the reference voltage, (4) determining whether the compressor has started successfully, (5) halting the drive signal when the processing means senses that the compressor has not started successfully and (6) increasing the reference voltage by and additional amount from the previously increased reference voltage each time the drive signal is halted in response to the halting function; and means for driving the compressor in response to the drive signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A controller of a refrigeration device including a compressor, comprising:
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means for detecting a temperature in a compartment of the refrigerating device; means for detecting a voltage of a power supply feeding power to the compressor, the power supply voltage detecting means including a transformer, a rectifier and smoothing circuit, and an A/D converter, a primary winding of the transformer being connected to the power supply, a secondary winding thereof and being connected to an input terminal of the rectifier and smoothing circuit, and an output terminal thereof being connected to the A/D converter; processing means for (1) comparing the temperature detected by the temperature detecting means with a set temperature, (2) comparing the power supply voltage detected by the voltage detecting means with a reference voltage, and (3) generating a drive signal when the detected temperature is higher than the set temperature and the power supply voltage is no lower than the reference voltage; and means for driving the compressor in response to the drive signal. - View Dependent Claims (9)
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10. A method for ensuring the successful starting of a compressor of a refrigerating device, comprising the steps of:
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comparing a voltage of a power supply for the compressor with a reference voltage; driving the compressor when the power supply voltage is no lower than the reference voltage; comparing again the power supply voltage with the reference voltage after the compressor has been driven for a predetermined time; halting the compressor when the power supply voltage is no lower than the reference voltage; and increasing the reference voltage by an additional amount from the previously increased reference voltage each time the compressor is halted in response to the halting function. - View Dependent Claims (11)
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12. A method for ensuring the successful starting of a compressor of a refrigerating device comprising the steps of:
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comparing a voltage of a power supply for the compressor with a reference voltage; driving the compressor when the power supply voltage is no lower than the reference voltage; comparing current flowing through the compressor with a predetermined current; halting the compressor when the current is greater than the predetermined current; and increasing the reference voltage by an additional amount from the previously increased reference voltage each time the compressor is halted in response to the halting function.
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13. A controller of a refrigerating device including a compressor comprising:
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means for detecting a temperature in a compartment of the refrigerating device; means for detecting a voltage of a power supply feeding power to the compressor; processing means for (1) comparing the temperature detected by the temperature detecting means with a set temperature, the processing means delaying the performance of the temperature comparing function a predetermined time before each time it performs the temperature comparing function, (2) comparing the power supply voltage detected by the voltage detecting means with a reference voltage, and (3) generating a drive signal when the detected temperature is higher than the set temperature and the power supply voltage is no lower than the reference voltage; and means for driving the compressor in response to the drive signal.
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Specification