Antifreeze valve unit
AssigneeCaleffi S.p.A.
InventorMarco Caleffi
Life of this patent
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Abstract
An antifreeze valve unit has a valve body provided with at least one opening for the delivery of a fluid used in an air conditioning plant; this unit has a first thermostatic valve, fitted at a drain outlet to drain the fluid in function of the fluid temperature, and a second thermostatic valve fitted at the drain outlet to enable or prevent the drain of the fluid in function of the external environment temperature. This antifreeze valve unit operates reliably in any temperature condition of the inner fluid and of the external environment temperature, and enables the plant to be drained only if a real possibility of fluid freezing occurs.
Claims18
Antifreeze valve unit for pipes connected to air conditioning plants including a valve body provided with at least one opening for the delivery of an operating fluid coming from an air conditioning plant, wherein it includes a first thermostatic valve fitted at a drain outlet to drain the fluid in function of the temperature of the fluid, and a second thermostatic valve fitted at said drain outlet to enable or prevent the drain of the fluid in function of the temperature of the external environment.
Dependencies are inferred from the claim text.