F - Mech Eng,Light,Heat,Weapons – 25 – B
Patent
F - Mech Eng,Light,Heat,Weapons
25
B
62/25
F25B 13/00 (2006.01) F24F 5/00 (2006.01) F25B 9/00 (2006.01) F25B 29/00 (2006.01)
Patent
CA 1039962
Abstract of the Disclosure An air conditioning system for a living space capable of operating as a heat pump or refrigerator employing a unitary compressor and expander having a common rotor with vanes defining enclosed compartments for positive compression of air in the compressor and positive expansion of air in the expander. A regenerative heat exchanger having thermally coupled air passages is employed in the system together with a non-regenerative primary heat exchanger which is located in the warm space. Air from the cool space is heated in the first passage of the regenerative heat exchanger, and moisture is injected, following which the air passes into the compressor inlet port. From the compressor outlet port wet air flows at high temperature and pressure to the primary heat exchanger located in the warm space where some of its heat is given up. Next the air flows through the second passage in the regenerative heat exchanger where its temperature is further lowered prior to being fed to the expander inlet port. Air from the expander outlet port, at low temperature and at atmospheric pressure, is discharged into the cool space, the net result being to increase the temperature differential between the spaces. When the system is used in the heat pump mode, the primary heat exchanger is located in the living space for heating the same, with the compressor-expander, initial air inlet, and final air outlet being located in the outside environment. In the preferred form of the invention a separate primary heat exchanger is located in the outside environment and transfer valves are provided to substitute the outside heat exchanger and for switching the initial air inlet and final air outlet into the living space for use of the system in the refrigeration mode. In an alternate form of the invention an auxiliary non-regenerative heat exchanger may be interposed between the final air outlet and initial air inlet. When the system is employed in the heat pump mode, provision is made for use of a solar heat absorber between the regenerative heat exchanger and the inlet port of the compressor.
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