TEMPERATURE CONTROL OF HEAT SUPPLY SYSTEM Russian patent published in 1998 - IPC

FIELD: automatic control over temperature of mixed ( circulating ) water in systems of centralized heat supply of buildings. SUBSTANCE: temperature control has inlet ducts to supply heat transfer agents from direct and return lines of heat supply system, outlet branch pipe in the form of diffuser positioned uniaxially to nozzle and throttle needle, bellows to drive throttle needle and manometric thermal system. Temperature control is fitted with control duct and valve coupled to outlet of manometric thermal system, guiding bushing installed in body to house throttling needle put with clearance and provided with at least one longitudinal profiled groove. Needle is made fast to butt of bellows located in blind chamber and is spring-loaded. Inside throttling needle there is made duct communicating inlet duct from direct line with blind chamber. Internal space of bellows is connected through clearance between throttling needle and guiding bushing to internal space of inlet duct and through control duct shut by control valve is connected to internal space of duct supplying return water. EFFECT: given temperature control is characterized by simplified design, shows small mass and size indices and enhanced reliability. 1 dwg