Refrigeration – Diverse systems – e.g. – ice and mechanical – Primary and secondary dependent circuits
Patent
1981-03-10
1983-02-22
King, Lloyd L.
Refrigeration
Diverse systems, e.g., ice and mechanical
Primary and secondary dependent circuits
62335, 62476, F25D 1700
Patent
active
043744680
ABSTRACT:
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.
REFERENCES:
patent: 2680956 (1954-06-01), Haas
patent: 3392541 (1968-07-01), Nussbaum
patent: 4025326 (1977-05-01), Leonard, Jr.
patent: 4100755 (1978-07-01), Leonard
patent: 4176525 (1979-12-01), Tucker et al.
patent: 4194368 (1980-03-01), Bahel et al.
Hozumi Shiro
Takeshita Isao
King Lloyd L.
Matsushita Electric Industrial Company
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