Low temperature cooling and dehumidification device with reversing airflow defrost for applications where cooling coil inlet air is above freezing
OwnerWalter Starkinventor
Life of this patent
Estimating the term…
Abstract
A low temperature cooling and dehumidification system uses a reverse airflow arrangement to defrost a frosted cooling coil while not interrupting operation. Automatic air dampers are used to reverse the airflow at the proper time to initiate defrost of that section of frosted cooling coil. This system is useful for low temperature cooling and dehumidification in situations where the inlet air is above freezing, however exiting air below freezing can be supplied if desired. It is advantageous for operation if the coolant flow and temperature internal to the cooling coil are regulated to create the conditions for frost formation to begin closer to the air leaving side of the active cooling coil.
Claims4
A device for cooling and dehumidifying an airstream to temperatures at or below freezing, while avoiding air restriction due to frost buildup in at least one cooling coil;
- where cooling coil inlet air is above freezing, said device comprising
- at least two opposing inlet air dampers at the device air inlet and at least two opposing outlet air dampers at the device air outlet;
- said device further comprising two airflow circuits, where at least one inlet damper is in airflow communication with at least one outlet damper, through said at least one cooling coil and by alternating the dampers in each of two airflow circuits, reversal of airflow occurs through said at least one cooling coil, routing warmer inlet air to the previously cold outlet of said at least one cooling coil, while maintaining airflow in one direction through said device.
Dependencies are inferred from the claim text.