Multicascade heating system

Abstract

A multi cascade heating system that comprises a plurality of heat-pump circuits successionally connected. The heat pump circuits are connected to one another by a common heat exchanger. Each of the heat pump circuits comprises a condenser and a refrigerant circulating in the heat pump circuit for heating a fluid flowing through the condenser. The fluid is successionally passing through the condenser of each heat pump circuit so that the temperature of the fluid is higher in each succeeding condenser as it passes towards an outlet of the multi cascade heating system while heat not utilized by the condenser for heating the fluid is exploited for heating the refrigerant of a succeeding heat pump circuit by the heat exchanger.

Dependencies are inferred from the claim text.