Tandem compressors with pulse width modulation suction valve
OwnerAlexander Lifson, Michael F. Taras +2inventors
InventorsAlexander Lifson, Michael F. Taras, Mark A. Lifson, George M. Taras
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Abstract
A refrigerant system is provided with tandem compressors. A tandem compressor arrangement includes at least two compressors operating in parallel and having at least one common manifold. A control may operate the compressors either simultaneously, or in some predetermined sequence to provide control over refrigerant system capacity. At least one of the tandem compressors is provided with a pulse width modulation control on a suction line. In this manner, the amount of refrigerant, compressed by the compressor, can be precisely controlled to exactly meet thermal load demands in the conditioned space.
Claims21
A refrigerant system comprising:
- at least two compressors operating in parallel to compress refrigerant and deliver refrigerant downstream to at least one condenser, at least one expansion device positioned downstream of said at least one condenser, and at least one evaporator positioned downstream of said at least one expansion device;
- and
- refrigerant returning from said at least one evaporator through at least one suction line to said at least two compressors, and a suction valve provided between said evaporator and at least one of said at least two compressors, said suction valve being provided with a pulse width modulation control to control the amount of refrigerant being delivered to said at least one of said at least two compressors.
-39. (canceled)
Dependencies are inferred from the claim text.