Monitoring refrigerant in a refrigeration system
First Claim
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1. A method comprising:
- sensing refrigerant pressure in a refrigeration system;
calculating a first refrigerant pressure parameter based on sensing said refrigerant pressure over a first time period;
calculating a second refrigerant pressure parameter based on sensing said refrigerant pressure over a second time period, said second time period occurring after said first time period;
calculating a difference between said first refrigerant pressure parameter and said second refrigerant pressure parameter;
comparing said difference between said first and second refrigerant pressure parameters and a predetermined threshold; and
determining a system condition based on said comparison.
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Abstract
A method for monitoring refrigerant in a refrigeration system includes sensing, a refrigerant pressure of a refrigeration system, averaging the refrigerant pressure over a time period, determining an expected pressure based on said time period, comparing the average to the expected pressure, and determining a system condition based on said comparison. The method may be executed by a controller or stored in a computer-readable medium.
426 Citations
32 Claims
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1. A method comprising:
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sensing refrigerant pressure in a refrigeration system; calculating a first refrigerant pressure parameter based on sensing said refrigerant pressure over a first time period; calculating a second refrigerant pressure parameter based on sensing said refrigerant pressure over a second time period, said second time period occurring after said first time period; calculating a difference between said first refrigerant pressure parameter and said second refrigerant pressure parameter; comparing said difference between said first and second refrigerant pressure parameters and a predetermined threshold; and determining a system condition based on said comparison. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A method comprising:
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sensing suction pressure and discharge pressure in a refrigeration system; calculating a first suction pressure parameter based on sensing said suction pressure over a first time period; calculating a second suction pressure parameter based on sensing said suction pressure over a second time period, said second time period occurring after said first time period; calculating a second discharge pressure parameter based on sensing said discharge pressure over said second time period; comparing a difference between said first and second suction pressure parameters to a predetermined suction pressure threshold; issuing a first system notification when said difference between said first and second suction pressure parameters is greater than said predetermined suction pressure threshold; and when said difference between said first and second suction pressure parameters is less than said predetermined suction pressure threshold, comparing a difference between said first discharge pressure parameter and said second discharge pressure parameter to a predetermined discharge pressure threshold and issuing a second system notification when said difference between said first and second pressure parameters is greater than said predetermined discharge pressure threshold. - View Dependent Claims (27, 28, 29, 30, 31, 32)
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Specification