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A heating and cooling system which uses heat derived from solar collectors to operate a heat engine which provides operating power to drive a heat pump/air conditioning system and including capability to operate either partly or wholly on supplementary energy sources such as an oil or gas furnace or

A heating and cooling system which uses heat derived from solar collectors to operate a heat engine which provides operating power to drive a heat pump/air conditioning system and including capability to operate either partly or wholly on supplementary energy sources such as an oil or gas furnace or electric power, and employing positive displacement heat engine and compressor units.

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In combination, means of circulating a primary flow of circulating liquid, and means of heating the said primary 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 refrigerant to

In combination, means of circulating a primary flow of circulating liquid, and means of heating the said primary 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 refrigerant to boil to a vapor, and means of controlling the said primary 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 an 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 exhausting the said vapor from the said cylinder to a condenser cooled by the outside heat sink, and means of injecting liquid refrigerant from the said condenser into the said boiler, 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 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 evaporator so that the said fluid medium receives a cooling effect from the said evaporator, and means of circulating the said fluid medium to cool the 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 cooling effect is required to cause cooling 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 cooling effect in sufficient quantity to keep the said inside of a building cooled to a pre-determined sensible temperature, and valve means of shutting off flow of vapor from the said boiler means to the said cylinder during the said times when the sensible temperature in the said boiler means is too low, and valve means of conducting vapor flow from the said evaporator through the said inlet valve into the said cylinder during the said times when the sensible temperature in the said boiler means is too low, so that the said piston is driven by the said crankshaft to move in the said cylinder in the alternate function of a compressor which assists the said positive displacement compressor means. In combination, means of circulating a primary flow of circulating liquid, and means of heating the said primary 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 refrigerant to boil to a vapor, and means of controlling the said primary 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 an 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 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 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 valve means of conducting vapor flow from the said evaporator through the said inlet valve into the said cylinder during the said times when the sensible temperature in the said boiler means is too low, so that the said piston is driven by the said crankshaft to move in the said cylinder in the alternate function of a compressor which assists the said positive displacement compressor means.