| 摘要 |
A vapor compression system including a line for flowing heat transfer fluid, a compressor connected with the line for increasing the pressure and temperature of the heat transfer fluid, a condenser connected with the line for liquefying the heat transfer fluid, and an expansion device connected with the line for expanding the heat transfer fluid. The expansion device includes a housing defining a first orifice, and at least one blade connected with the housing, wherein the blade is movable between a first position and a second position, wherein the first orifice is larger in the first position than in the second position. The vapor compression system also includes an evaporator connected with the line for transferring heat from ambient surroundings to the heat transfer fluid.
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