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A heating system using heat derived from solar collectors to operate a reciprocating piston heat engine which provides operating power to drive a heat pump, and with additional capability to operate as a heat pump with electric motor drive, and with separate inlet valves for heat engine and heat pum

A heating system using heat derived from solar collectors to operate a reciprocating piston heat engine which provides operating power to drive a heat pump, and with additional capability to operate as a heat pump with electric motor drive, and with separate inlet valves for heat engine and heat pump operation.

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In combination, means of circulating a flow of circulating liquid, and means of heating the said flow of circulating liquid by solar radiation to a sensible temperature greater than the sensible temperature of the outside heat sink, and a boiler means of causing liquid regrigerant to boil to a vapor

In combination, means of circulating a flow of circulating liquid, and means of heating the said flow of circulating liquid by solar radiation to a sensible temperature greater than the sensible temperature of the outside heat sink, and a boiler means of causing liquid regrigerant to boil to a vapor, and means of causing the said flow of circulating liquid to heat the said boiler means, and means of introducing the said vapor into a cylinder, and the said means of introducing including a primary inlet valve, and a piston which is moved in the said cylinder by pressure from the said vapor when the said pressure is adequate to cause this movement, and means of connecting the said piston to a crankshaft so that the movement of the said piston under the influence of the said pressure causes rotation of the said crankshaft In the function of a heat engine, and means of controlling the operation of the said primary inlet valve, and the said means of controlling being influenced by the said rotation of the said crankshaft, and the inside of a building maintained at a sensible temperature higher than the sensible temperature of the outside heat sink, and a condenser in which condensing of refrigerant vapor occurs at a sensible temperature higher than the sensible temperature of the said inside of a building, and means of exhausting the said vapor from the said cylinder to the said condenser, and means of injecting liquid refrigerant from the said condenser into the said boiler means, and an evaporator in which refrigerant liquid evaporates at a sensible temperature lower than the sensible temperature of the outside heat sink, and means of transferring heat from the outside heat sink to the said evaporator to provide latent heat of vaporization, and means of introducing liquid refrigerant into the said evaporator from the said condenser, and means of coupling the said crankshaft to drive a positive displacement compressor means of drawing refrigerant vapor from the said evaporator, and means of discharging the vapor compressed by the said positive displacement compressor means into the said condenser, and means of circulating a fluid medium to contact the said condenser so that the said fluid medium receives a heating effect from the said condenser, and means of circulating the said fluid medium to heat the said inside of a building, and an electric motor means of driving the said crankshaft, and means of automatically controlling the said electric motor means to provide motive power to start the motion of the said function of a heat engine, and means of automatically controlling the said electric motor means to provide motive power to drive the said positive displacement compressor means when the said heating effect is required to cause heating of the said inside of a building during times when the sensible temperature in the said boiler means is too low for the said function of a heat engine to provide sufficient power to drive the said compressor means fast enough to provide the said heating effect in sufficient quantity to keep the said inside of a building heated to a pre-determined sensible temperature, and a secondary inlet valve means of conducting vapor flow from the said evaporator into the said cylinder during times when the sensible temperature of the said flow of circulating liquid is lower than the sensible temperature of the outside heat sink, and means of causing the said motor means to drive the said crankshaft during the said times when the sensible temperature in the said boiler is too low, and means of employing the said crankshaft to drive the said piston in the said cylinder in the alternate function of a compressor which assists the said positive displacement compressor means when the said motor means is driving the said crankshaft.