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US 6,176,095 B1Granted
Pretrip device for testing of a refrigeration system compressor
AssigneeCarrier Corporation
InventorKevin J. Porter
Life of this patent
Estimating the term…
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AssigneeCarrier Corporation
InventorKevin J. Porter
Estimating the term…
A refrigeration/heating system for cooling or heating an area includes a condenser for removing heat from the system to an external environment, an evaporator for receiving heat from the area to be cooled or delivering heat to the area to be heated, and a compressor for raising the pressure and the temperature of a refrigerant. The compressor has at least one cylinder bank and an unloader connected to the cylinder bank for loading and unloading the cylinder bank. Pressure transducers measure the suction and discharge pressures of the compressor when the state of a cylinder bank is changed from a loaded to an unloaded state. A processor uses the suction and discharge pressures in the various states to determine the operational condition of either unloader. By varying the loading and unloading of a pair of cylinder banks, the processor can also use various suction and discharge pressures to determine if a problem exists within either cylinder bank or unloader.
A method for testing a compressor of the type having at least one unloader, a first cylinder bank, and a second cylinder bank, said method comprising the steps of:
A method for testing a compressor of the type having a front unloader, a rear unloader, a front cylinder bank and a rear cylinder bank, said method comprising the steps of:
A refrigeration system comprising:
Dependencies are inferred from the claim text.