| 摘要 |
A refrigerator is disclosed that consists in contrast to conventional refrigerators of a number of heat exchangers that are separated into halves, in which the same refrigeration cycle process takes place simultaneously but chronologically displaced, and wherein all heat exchangers are driven the same compressor. A cold medium flows about one half of the heat exchanger (evaporator) at certain time periods, a hot medium flows about the other half of the heat exchanger (condenser). The refrigeration cycle process consists of six changes of state: isochoric heat input, isothermal expansion, isobaric condensation, isochoric heat extraction, isothermal compression and isobaric evaporation. In the disclosed embodiment, the compressor is a double acting piston compressor establishing a connection to the heat exchangers via valves on both sides of the piston at predefined points in time within a cycle period. The piston is driven by a linear motor or by a crank shaft and a piston rod. While the working gas is compressed on one side of the piston, the working gas is sucked out of a different heat exchanger on the other side. It should be noted, that other types of compressors may also be employed. Due to the six changes of state that are put into effect by this machine, a new cycle process is established which realizes a higher degree of efficiency (coefficient of performance) than conventional refrigerators or heat pumps.
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