CASCADE HEAT PUMP SYSTEM FOR HEATING AND HOT WATER SUPPLY OF PRIVATE AND UTILITY SPACES Russian patent published in 2017 - IPC F24D3/18 

FIELD: engines and pumps.

SUBSTANCE: invention relates to heating systems with heat pumps, using low-temperature heat sources of natural or artificial origin to obtain water, suitable for autonomous heating and hot water supply of premises of enterprises in the sphere of housing and communal services, as well as cottages and private houses. A cascade heat pump system comprising two heat pumps connected in series to the consumer, which form the stages of the cascade. The first stage of the cascade of evaporator is included in the circulation circuit of low-heat source and capacitor of the second stage of the cascade is included in the circulation circuit heat consumer, it contains additional circulating outline with technological medium temperature heat transfer agent. The condenser of the first stage of the cascade and the evaporator of the second stage of the cascade are included in said additional circulation circuit, and at the outlet of the evaporator of the second stage of the cascade it contains an additional capacity for overheating of the saturated vapour of the refrigerant, and at the output of the condenser of the second stage of the cascade it contains an additional reservoir for the selection of excess heat of the refrigerant. Part of the excess heat generated by cooling the refrigerant additional condenser capacity the second stage of the cascade can be used for vapour refrigerant superheat in additional capacity at the outlet of the evaporator is the second stage of the cascade.

EFFECT: increase of reliability and efficiency of the cascade heat pump system, built on the basis of typical elements of heat pumps.

11 cl, 1 dwg