| 摘要 |
A fixed restriction is placed in a suction line leading to a compressor. The size of the restriction is selected to achieve a desired capacity reduction (correction) for the refrigerant system compressor. By selectively restricting the flow of refrigerant through the suction line, the capacity delivered by the compressor will be reduced. This allows a designer of a refrigerant system to utilize an available compressor of a specific size (displacement) to satisfy the desired system operating conditions and performance characteristics as well as application requirements. In embodiments, the refrigerant system may be provided with an economizer and unloader functions. The restriction may be placed in the compressor suction port, or in the suction line leading to the compressor. Further, a pair of parallel flow passages may communicate an evaporator to the compressor, with the restriction being placed in one and a solenoid valve placed in the other.
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