Pressure balance valve, equipped with means of protection against low temperatures for cold.

摘要

Device for balancing the pressure difference between the inside and outside of a substantially sealed chamber; It said chamber being a cold storage, particularly domestic freezers or hot chambers; said device: - comprising means of interception (5, 6, 5a, 7a.3, 7A.4, 5b, 7B.1, 7b.3) unidirectional or bidirectional type; - installed near the outer surface (2) of the wall (1, 1a) of said sealing and camera connected to the inner surface (3) of the chamber itself through a duct (7, 7b) created in said wall ( 1, 1a) of said chamber, - and being substantially enclosed within said outer and inner surfaces (2, 3) of said wall (1; 1a) further comprising one or more static inserts (8; 8.a ; 8.b): - made of insulating material - incorporated within said conduit (7, 7b), - forming one or more open channels (8.1, 8A.1, 8B.1) along which the passage of air from / to the outside into / from the inside of said chamber is possible when a pressure difference between the inside and outside of said chamber, - at said channels (8.1, 8A.1, 8B.1) are designed to substantially prevent any heat transfer from / to the outside into / from the inside of said refrigerating camera or hot through said air when no pressure difference occurs between the inside and the outside of said room or chamber.