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An absorption type refrigeration system includes a main flow circuit, a first and a second auxiliary flow circuit. The main flow circuit includes a refrigerant generator containing a solution of evaporable refrigerant in a less evaporable solvent which is heated by solar energy. Pressurized vapor ph

An absorption type refrigeration system includes a main flow circuit, a first and a second auxiliary flow circuit. The main flow circuit includes a refrigerant generator containing a solution of evaporable refrigerant in a less evaporable solvent which is heated by solar energy. Pressurized vapor phase refrigerant is supplied to a main condenser and thence to a main evaporator and back to an absorber in which a low refrigerant content solution from the generator is converted to a high refrigerant content solution which is pumped to the generator for recirculation. An electrically driven compressor supplies vapor phase refrigerant through the first auxiliary flow circuit including a condenser, a diaphragm-operated expansion valve, and a first auxiliary evaporator which is arranged to cool the main condenser. The expansion valve is responsive to the vapor pressure of the generator to regulate the pressure of the auxiliary evaporator in a predetermined relationship with the pressure of the main condenser so that the pressure at which refrigerant is evaporated in the first auxiliary evaporator is lower than the pressure at which refrigerant is condensed in the main condenser. The expansion valve is closed when the generator pressure is below the evaporation pressure of the main circuit to direct refrigerant from the compressor to a second auxiliary evaporator.

대표청구항 ▼

A refrigeration system comprising: a main closed loop working-fluid flow circuit including a refrigerant generator, condenser, an evaporator and an absorber, all of which are connected in series in said flow circuit; a first auxiliary closed loop refrigerant flow circuit including a compressor, a co

A refrigeration system comprising: a main closed loop working-fluid flow circuit including a refrigerant generator, condenser, an evaporator and an absorber, all of which are connected in series in said flow circuit; a first auxiliary closed loop refrigerant flow circuit including a compressor, a condenser and an evaporator, all of which are connected in series in the last-mentioned flow circuit, the evaporator of the auxiliary flow circuit being arranged to cool the condenser of said main flow circuit, said auxiliary flow circuit further including means for controlling the pressure of said auxiliary flow circuit evaporator as a function of the pressure in said refrigerant generator; and a second auxiliary refrigerant flow circuit connected in parallel with the first auxiliary flow circuit, said second auxiliary flow circuit including an evaporator located adjacent to the main flow circuit evaporator, said pressure controlling means comprising a valve for routing the refrigerant from said compressor to the evaporator of said second auxiliary flow circuit when the pressure in said refrigerant generator falls below a predetermined value.