Variable capacity defrost
AssigneeCarrier Corporation
InventorCharles A. Cluff
Life of this patent
Estimating the term…
Abstract
A method of performing a defrost operation in a heating, ventilation and air conditioning (HVAC) system having a first heat exchanger and a second heat exchanger, the method including determining that the defrost operation is needed; determining a capacity for the defrost operation in response to one or more prior defrost operations; beginning the defrost operation at the determined capacity; monitoring a defrost parameter; determining if the defrost parameter indicates a need for increased capacity; and increasing the capacity of the defrost operation when the defrost parameter indicates the need for increased capacity.
Claims16
A method of performing a defrost operation in a heating, ventilation and air conditioning (HVAC) system having a first heat exchanger and a second heat exchanger, wherein the defrost operation is performed on the second heat exchanger, the method comprising:
- determining that the defrost operation is needed;
- determining a capacity for the defrost operation in response to one or more prior defrost operations;
- beginning the defrost operation at the determined capacity;
- monitoring a defrost parameter;
- determining if the defrost parameter indicates a need for increased capacity;
- and
- increasing the capacity of the defrost operation when the defrost parameter indicates the need for increased capacity.
A heating, ventilation and air conditioning (HVAC) system comprising:
- a first heat exchanger;
- a second heat exchanger;
- a temperature sensor configured to sense a temperature of the second heat exchanger;
- a controller configured to execute defrost operations for the second heat exchanger including:
- determining that the defrost operation is needed;
- determining a capacity for the defrost operation in response to one or more prior defrost operations;
- beginning the defrost operation at the determined capacity;
- monitoring a defrost parameter,
- determining if the defrost parameter indicates a need for increased capacity;
- and
- increasing the capacity of the defrost operation when the defrost parameter indicates the need for increased capacity.
Dependencies are inferred from the claim text.