Tyco Fire + Security Gmbh

Johnson Controls Tyco IP Holdings Llp

Matthew Lee Heisey

Paul William Snell

Ian Michael Casper

David Andrew Bradshaw

Tyler A Wolgemuth

Katelynn Louise Crissman

Paul W Snell, Ii

An induction motor for a chiller assembly is provided. The induction motor includes a housing and a stator having a cylindrical shape with a first end, a second end, an interior surface, and an exterior surface. The cylindrical shape defines a central axis. The induction motor further includes a rotor and a shaft with a first end and a second end. The rotor and the shaft are configured to rotate within the interior cylindrical surface of the stator about the central axis. The induction motor additionally includes a first bearing assembly located proximate the first end of the shaft, a second bearing assembly located proximate the second end of the shaft, a first nozzle ring and a second nozzle ring. The first and second nozzle rings are configured to direct a cooling fluid between the interior surface of the stator and the rotor.

Liquid injection nozzles for chiller motor

A hybrid cooling system for a hermetic motor includes an annular cavity in a motor housing that receives a vapor flow and an annulus in the motor housing that receives a liquid flow. The hybrid cooling system includes a sleeve disposed adjacent to the annular cavity and the annulus, where a radial opening is defined through the sleeve. The hybrid cooling system includes a stator at least partially surrounded by the sleeve, a gap defined between the stator and a rotor, and a vent slot of the stator configured to receive the vapor flow from the annular cavity through the radial opening of the sleeve and direct the vapor flow to the gap. The hybrid cooling system includes an exit path in the motor housing configured to direct an evaporated vapor flow, generated from the liquid flow contacting the stator, and the vapor flow out of the motor housing.

Hybrid cooling systems for hermetic motors

A system for cooling a hermetic motor includes a motor cooling refrigerant flow path configured to direct refrigerant from a condenser disposed along a refrigerant loop to a hermetic motor, and from the hermetic motor back to the refrigerant loop, and a housing of the hermetic motor disposed along the motor cooling refrigerant flow path and configured to receive the refrigerant from the condenser, wherein the housing of the hermetic motor comprises an annulus surrounding at least a portion of a stator of the hermetic motor, and wherein the annulus comprises a plurality of openings configured to direct refrigerant toward the stator and into a cavity of the housing of the hermetic motor.

Hermetic motor cooling system

A cooling system for a motor to power a compressor in a vapor compression system is provided. The cooling system includes a housing with a cavity enclosing the motor and defining a central axis and fluid directing features extending into the cavity and oriented parallel to the central axis. The cooling system further includes a fluid circuit configured to circulate a cooling fluid between the housing and the motor. The fluid circuit includes a first cooling fluid path defined by directing features that cause a first portion of cooling fluid to travel around a first portion of the motor and a second cooling fluid path defined by fluid directing features that cause a second portion of cooling fluid to travel around a second portion of the motor. The second portion of the motor is located opposite the first portion.

Chiller motor with cooling flow path

A heating, ventilation, and/or air conditioning (HVAC) system includes a compressor having an impeller configured to rotate and drive a working fluid through a working fluid circuit of the HVAC system in an active operating mode. The HVAC system further includes a controller configured to, in response to receiving an input indicative of a transition to operate in an inactive operating mode, suspend the active operating mode by interrupting a supply of power to the compressor, adjust pre-rotation vanes of the compressor, a variable geometry diffuser of the compressor to a first position, or both to enable a backflow of the working fluid through the compressor for a first interval of time, and, after the first interval of time has elapsed, adjust the pre-rotation vanes, the variable geometry diffuser, or both to a second position to block the backflow of the working fluid through the compressor.

Growing community of inventors

York, PA, United States of America

Matthew Lee Heisey