Back to results
US 11,874,038 B2Granted
Thermostatic expansion valves and methods of control
AssigneeCarrier Corporation
InventorsDouglas Auyer, Gilbert B. Hofsdal, William C. Silliman, Raymond L. Senf, Jr.
Life of this patent
Estimating the term…
Abstract
A method of operating a refrigeration system is provided. The method includes activating an evaporator heater, monitoring a pressure differential within the refrigeration system, when the pressure differential reaches a predetermined value, deactivating the evaporator heater, and activating one or more evaporator fans, after deactivating the evaporator heater, to cause a thermostatic expansion valve to open.
Claims19
A method of operating a refrigeration system comprising:
- determining that the refrigeration system shutdown at a time less than or equal to 12 hours prior;
- activating an evaporator heater;
- monitoring a pressure differential within the refrigeration system;
- in response to the pressure differential reaching a predetermined value, deactivating the evaporator heater;
- activating one or more evaporator fans, after deactivating the evaporator heater, to cause a thermostatic expansion valve to open;
- and
- restarting the refrigeration system.
4 more elements
A refrigeration system comprising:
- a compressor;
- a condenser having one or more condenser fans;
- an evaporator having an evaporator heater and one or more evaporator fans;
- a thermostatic expansion valve;
- a fluid path fluidly connecting the compressor, the condenser, the evaporator, and the thermostatic expansion valve;
- and
- a controller configured to:
- determine that the refrigeration system shutdown at a time less than or equal to 12 hours prior;
- activate the evaporator heater;
- monitor a pressure differential within the fluid path;
- in response to the pressure differential reaching a predetermined value, deactivate the evaporator heater;
- activate the one or more evaporator fans to cause the thermostatic expansion valve to open, and
- restart the refrigeration system.
10 more elements
Dependencies are inferred from the claim text.