SYSTEM AND METHOD FOR EVALUATING PARAMETERS FOR A REFRIGERATION SYSTEM WITH A VARIABLE SPEED COMPRESSOR
First Claim
1. A system comprising:
- a compressor connected to a condenser and an evaporator;
a condenser sensor that outputs a condenser signal corresponding to at least one of a condenser pressure and a condenser temperature;
an evaporator sensor that outputs an evaporator signal corresponding to at least one of an evaporator pressure and an evaporator temperature;
an inverter drive that modulates a frequency of electric power delivered to said compressor to modulate a speed of said compressor;
a monitor module that receives compressor power data and compressor speed data from said inverter drive, determines a measured condenser temperature based on said condenser signal, determines a measured evaporator temperature based on said evaporator signal, calculates a first derived condenser temperature based on said compressor power data and said compressor speed data, calculates a second derived condenser temperature based on said measured evaporator temperature, said compressor power data and said compressor speed data, and compares said measured condenser temperature with said first and second derived condenser temperatures to determine whether any of said measured condenser temperature and said first and second derived condenser temperatures are inaccurate.
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Accused Products
Abstract
A system and method for evaluating parameters for a refrigeration system having a variable speed compressor is provided. A compressor is connected to a condenser and an evaporator. A condenser sensor and an evaporator sensor are provided. An inverter drive modulates a frequency of electric power delivered to the compressor to modulate a speed of the compressor. A monitor module receives compressor power data and compressor speed data from the inverter drive, determines a measured condenser temperature based on the condenser signal, determines a measured evaporator temperature based on the evaporator signal, calculates a first derived condenser temperature based on the compressor power data and the compressor speed data, calculates a second derived condenser temperature based on the measured evaporator temperature, the compressor power data and the compressor speed data, and compares the measured condenser temperature with the first and second derived condenser temperatures to determine whether any of the measured condenser temperature and the first and second derived condenser temperatures are inaccurate.
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Citations
18 Claims
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1. A system comprising:
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a compressor connected to a condenser and an evaporator; a condenser sensor that outputs a condenser signal corresponding to at least one of a condenser pressure and a condenser temperature; an evaporator sensor that outputs an evaporator signal corresponding to at least one of an evaporator pressure and an evaporator temperature; an inverter drive that modulates a frequency of electric power delivered to said compressor to modulate a speed of said compressor; a monitor module that receives compressor power data and compressor speed data from said inverter drive, determines a measured condenser temperature based on said condenser signal, determines a measured evaporator temperature based on said evaporator signal, calculates a first derived condenser temperature based on said compressor power data and said compressor speed data, calculates a second derived condenser temperature based on said measured evaporator temperature, said compressor power data and said compressor speed data, and compares said measured condenser temperature with said first and second derived condenser temperatures to determine whether any of said measured condenser temperature and said first and second derived condenser temperatures are inaccurate. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system comprising:
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a compressor connected to a condenser and an evaporator; a condenser sensor that outputs a condenser signal corresponding to at least one of a condenser pressure and a condenser temperature; an evaporator sensor that outputs an evaporator signal corresponding to at least one of an evaporator pressure and an evaporator temperature; a discharge temperature sensor that outputs a discharge temperature signal corresponding to a temperature of refrigerant exiting said compressor; an inverter drive that modulates a frequency of electric power delivered to said compressor to modulate a speed of said compressor; a monitor module that receives compressor power data and compressor speed data from said inverter drive, determines a measured condenser temperature based on said evaporator signal, determines a measured evaporator temperature based on said evaporator signal, calculates a first derived evaporator temperature based on said compressor power data, said discharge temperature signal, and said compressor speed data, calculates a second derived evaporator temperature based on said measured condenser temperature, said compressor power data, said compressor speed data, and said discharge temperature signal, and compares said measured evaporator temperature with said first and second derived evaporator temperatures to determine whether any of said measured evaporator temperature and said first and second derived evaporator temperatures are inaccurate. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method comprising;
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receiving an evaporator signal corresponding to at least one of an evaporator pressure and an evaporator temperature corresponding to an evaporator connected to a condenser and a compressor; receiving a condenser signal corresponding to at least one of a condenser pressure and a condenser temperature corresponding to said condenser; receiving compressor power data and compressor speed data from an inverter drive that drives said compressor; determining a measured condenser temperature based on said condenser signal; determining a measured evaporator temperature based on said evaporator signal; calculating a first derived condenser temperature based on said compresor data and said compressor speed data; calculating a second derived condenser temperature based on said measured evaporator temperature, said compressor power data, and said compressor speed data; comparing said measured condenser temperature with said first and second derived condenser temperatures to determine whether any of said measured condenser temperature and said first and second derived condenser temperatures are inaccurate. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification