US 2022/0136744 A1 · TURBO CHILLER

Abstract

A turbo chiller that has an oil-free configuration, which reduces the frequency of maintenance and maintenance-induced release of refrigerant, and can achieve a reduced environmental impact by utilizing the characteristics of the low-pressure refrigerant R1233zd(E) that reaches negative pressure at a saturation temperature of 18° C. or lower. The turbo chiller comprises a refrigeration cycle that includes a turbo compressor, a condenser, a decompression device, and an evaporator connected in sequence via piping and is filled with a refrigerant; wherein the refrigerant is a low-pressure refrigerant R1233zd(E) refrigerant with low global warming potential and low ozone depletion potential; the turbo compressor has a direct drive configuration in which a rotating shaft of impellers is directly joined to a motor; and the rotating shaft is supported by magnetic bearings.

Claims10

Dependent claims

A turbo chiller comprising:

a closed refrigeration cycle that includes a turbo compressor, a condenser, a decompression device, and an evaporator connected in sequence via piping and is filled with a refrigerant;
wherein
the refrigerant is a low-pressure refrigerant R1233zd(E) refrigerant with low global warming potential and low ozone depletion potential;
the turbo compressor has a direct drive configuration in which a rotating shaft of an impeller is directly joined to a motor;
the motor is disposed inside a motor housing;
the motor housing includes an extension portion that extends an internal space of the motor housing in a direction intersecting with the rotating shaft;
the extension portion is provided only at a position that does not overlap with a center portion of the motor as seen from a direction perpendicular to the rotating shaft;
and
the rotating shaft is supported by a magnetic bearing.

6 more elements

Dependencies are inferred from the claim text.

Turbo chiller

Life of this patent

Turbo chiller

Life of this patent

Abstract

Claims10