Daikin Applied Americas Inc.

Other

Daikin Industries, Ltd.

Joseph Layton Knopp

Jeffrey Allen Morgan

Ronald J Formosa, Jr

Bernard Zimmern

Paul Johnson

Naomasa Miki

Ronald J Formosa

A compressor includes a compression mechanism, a shaft, a motor, and a cooling medium delivery structure. The motor includes a rotor mounted on the shaft and a stator disposed radially outwardly of the rotor to form a gap between the rotor and the stator. The cooling medium delivery structure includes inlet and outlet conduits located to supply and discharge a cooling medium to and from the motor. The shaft has an external shape different than an internal shape of the rotor to form at least one axial passageway between the shaft and the rotor. The cooling medium is supplied through the gap and the at least one axial passageway to cool the rotor.

Compressor with motor cooling

An economizer includes a separation wheel, a motor, and a liquid storage portion. The separation wheel is arranged and configured to separate refrigerant into gas refrigerant and liquid refrigerant. The separation wheel is attached to a shaft rotatable about a rotation axis. The motor is arranged and configured to rotate the shaft in order to rotate the separation wheel. The liquid storage portion is arranged and configured to store the liquid refrigerant. The economizer is adapted to be used in a chiller system including a compressor, an evaporator and a condenser.

Economizer used in chiller system

A centrifugal compressor includes a casing, an inlet guide vane, an impeller, a motor, a diffuser and a cooling medium delivery structure. The motor includes a rotor mounted on the shaft and a stator disposed radially outwardly of the rotor to form a gap between the rotor and the stator. The cooling medium delivery structure includes inlet and outlet conduits located to supply and discharge a cooling medium to and from the motor. The shaft has an external shape different than an internal shape of the rotor to form at least one axial passageway between the shaft and the rotor. The cooling medium is supplied through the gap and the at least one axial passageway to cool the rotor.

Centrifugal compressor with motor cooling

Liquid coming from the condenser or present in the fluid discharged by the compressor circulates in grooves provided between a stator 7 and a housing 10 of the motor at a distance from the coils (8, 9) thereof. The liquid cools the stator without any risk of short-circuit in the coils. The liquid may be urged by a centrifugal economizer separator 13 through the liquid outlet 16 thereof, towards liquid inlets 27 and 27'. The pressurized gas produced by separator 13 is sent in the motor housing through slit 17 and then, having cooled the coils, reaches economizer hole 12 of the compressor, through conduit 11. Thus, the heated gas is not sent to the intake of the compressor where it would reduce the compressor capacity and efficiency.

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Staunton, VA, United States of America

Joseph Layton Knopp