Pressure control for refrigerant system
AssigneeJohnson Controls Technology Company
InventorsPaul Marie de Larminat, Roger Marc Levesque
Life of this patent
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Abstract
A system includes a condenser and an evaporator. The condenser is configured to condense a working fluid, and the evaporator is configured to evaporate the working fluid. The system also includes piping that is configured to circulate the working fluid between the condenser and the evaporator. In addition, the system includes a low point configured to collect condensed working fluid. A controller is configured to selectively enable heating of the condensed working fluid collected within the low point based on a working fluid pressure of the low point.
Claims20
A refrigerant system comprising:
- a condenser configured to condense a working fluid;
- an evaporator configured to evaporate the working fluid;
- piping configured to circulate the working fluid between the condenser and the evaporator;
- a low point configured to collect condensed working fluid;
- and
- a controller configured to selectively enable heating of the condensed working fluid collected within the low point based on a working fluid pressure of the low point and a threshold pressure.
A system, comprising:
- one or more tangible, machine-readable media at least collectively comprising instructions executable by a processor, the instructions comprising instructions to:
- receive a signal indicative of a working fluid pressure of a working fluid within a low point of a refrigerant system;
- determine if the working fluid pressure is below a threshold pressure;
- and
- enable heating of the working fluid within the low point using a heat source when the working fluid pressure is below the threshold pressure.
A method, comprising:
- detecting a working fluid pressure of a working fluid collected within a low point of a heating, ventilation, air conditioning, or refrigeration refrigerant system using a pressure sensor;
- determining, with a controller, if the working fluid pressure is below a threshold pressure;
- and
- selectively enabling heating of the working fluid using a first heat source, a second heat source, or both, when the working fluid pressure is below the threshold pressure based on instructions from the controller.
Dependencies are inferred from the claim text.