| 摘要 |
A high efficiency pool heating system (10) includes a power circuit (12) and heat pump circuit (14). Each circuit having a working fluid flowing therein. In the power circuit, a heater (16) vaporizes the working fluid which is periodically delivered and exhausted through a valve section (32) to a driving section (28) of a power unit (26). The driving section drives a driven section (30) which operates as a compressor for the working fluid in the heat pump circuit. Fluid exhausted from the driven section of the power unit is passed to a first portion (48) of a heat exchanger (46) which is in fluid communication with the water of a pool. In the heat exchanger, the working fluid in the power circuit is condensed to a liquid. Thereafter, the liquid is passed through the power circuit back to the heater where it is again vaporized. In the heat pump circit vaporized working fluid is compressed in the driven end of the power unit and delivered to a second portion (50) of the heat exchanger wherein the working fluid delivers heat to the pool water and is condensed. Thereafter, the liquid in the heat pump circuit is passed through a flow expander (98) and into an evaporator (102) wherein the working fluid absorbs heat from atmosphere and vaporizes. The fluid is then delivered to the driven end of the power unit to complete the heat pump circuit.
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