초록 ▼

A refrigeration system is disclosed in which negative energy storage is provided to significantly reduce electrical energy consumption during peak air conditioning hours. A transfer pump is provided in the system for pumping condensed and mixed phase refrigerant from the negative energy storage to a

A refrigeration system is disclosed in which negative energy storage is provided to significantly reduce electrical energy consumption during peak air conditioning hours. A transfer pump is provided in the system for pumping condensed and mixed phase refrigerant from the negative energy storage to an evaporator coil where it absorbs heat energy from an air conditioned space. The transfer pump is a positive displacement pump employing a rotor and vanes rotating in a pumping chamber. Dual inlets and discharges from the pumping chamber are located to balance forces on the rotor. The inlets enter the pumping chamber radially. A hermetic enclosure seals the pump and an electric drive motor to eliminate dynamic seals within the pump and thereby greatly reduce leakage of refrigeration from the system. A refrigeration overfeed system using a hermetically sealed pump according to the invention is also disclosed.

대표청구항 ▼

In a refrigeration system having a condensing unit, an evaporating unit, a refrigerant for circulation between the condensing unit and the evaporating unit, and a pump to pump liquid refrigerant from the condensing unit to the evaporating unit, the improvement comprising: the pump comprising a herme

In a refrigeration system having a condensing unit, an evaporating unit, a refrigerant for circulation between the condensing unit and the evaporating unit, and a pump to pump liquid refrigerant from the condensing unit to the evaporating unit, the improvement comprising: the pump comprising a hermetically sealed enclosure with an inlet opening and an outlet opening, a pump rotor mounted for rotation within the hermetically sealed enclosure on bearings wholly within the hermetically sealed housing, the pump rotor having a plurality of radially disposed vanes which form with the rotor and the enclosure a balanced rotor, positive displacement vane pump; the enclosure has a housing forming a generally elliptical rotor chamber, the rotor is mounted for rotation therein, a discharge passage extends axially from the rotor chamber; the rotor has a series of slots in which the vanes are slidably mounted, each slot having a radial outer end and a leading radial wall; the rotor further has a groove at the outer end of each slot at its leading radial wall to decrease a flow restriction upon the refrigerant leaving the rotor chamber; and the hermetically sealed enclosure housing further forms a motor chamber, and a discharge passage extends from the rotor chamber into the motor chamber.