초록 ▼

A capacity control for a multi-cylinder refrigeration compressor includes a modulating valve disposed between a suction manifold and less than all of the cylinders of the refrigeration compressor. The modulating valve regulates the flow of refrigerant gas from the manifold to the cylinders in commun

A capacity control for a multi-cylinder refrigeration compressor includes a modulating valve disposed between a suction manifold and less than all of the cylinders of the refrigeration compressor. The modulating valve regulates the flow of refrigerant gas from the manifold to the cylinders in communication therewith, with the valve functioning to increase the flow of refrigerant gas to the cylinders as the load on the refrigeration unit increases and to decrease the flow of refrigerant as the load on the refrigeration unit decreases.

대표청구항 ▼

Capacity control apparatus for a multi-cylinder refrigerant compressor employed in a mechanical refrigeration unit comprising: means defining a manifold for delivering refrigerant vapor to less than all of the cylinders of the compressor; a housing disposed between the manifold and the cylinders rec

Capacity control apparatus for a multi-cylinder refrigerant compressor employed in a mechanical refrigeration unit comprising: means defining a manifold for delivering refrigerant vapor to less than all of the cylinders of the compressor; a housing disposed between the manifold and the cylinders receiving refrigerant vapor therefrom for conducting refrigerant vapor from the manifold to these cylinders; a piston reciprocally disposed within the housing for modulating movement between open and closed positions to modulate the flow of refrigerant vapor from the manifold to the cylinders receiving vapor therefrom, the piston dividing the housing into an upper chamber spaced from the manifold, and a lower chamber in communication therewith and located between the manifold and the upper chamber; means for producing a relatively constant force in the upper chamber urging the piston to the closed position; and means for producing a variable force in the lower chamber urging the piston to the open position, the variable force producing means including vapor entering the housing from the manifold wherein the position of the piston and the quantity of refrigerant passing through the housing modulate in response to changes in the pressure of refrigerant vapor in the manifold.