Carrier Corporation

Texas Instruments Corporation

James C Wilson

Howard H Fraser, Jr

Robert A Chopko

Donald Yannascoli

John R D'Entremont

Francis P Wilson

Kenneth B Barrett

Ernest F Reynolds

William H Rouseau

A transport refrigeration system includes a compressor having discharge and suction ports and at least one electric compressor drive motor disposed within the compressor. The system includes a condenser heat exchanger unit and an evaporator heat exchanger unit operatively coupled, respectively, to the compressor discharge port and the compressor suction port. At least one fan assembly having an electric fan motor is configured to provide air flow over at least one of the heat exchanger units. The system includes an integrally mounted unitary engine driven synchronous generator assembly, which is configured to selectively produce at least one A.C. voltage at one or more frequencies. The compressor drive motor and the at least one fan motor are configured to be directly coupled to the synchronous generator and to operate at a voltage and frequency produced thereby. The compressor is provided with means for unloading at least a portion of the compressor's compressing capability. Controls for the system are provided for selectively energizing the means for unloading the compressor during certain operating conditions of the refrigeration system, such as during start up of the compressor.

Start up control for a transport refrigeration unit with synchronous generator power system

Draining lubricant tends to be slung off of radially extending surfaces of the rotating shaft and entrained by the suction gas. This is prevented by providing an oil shield which collects the slung oil and directs it downwardly out of the path of the flowing suction gas.

Oil shield

Protection for an encased motor driven device is enhanced by utilizing additional sensors with associated resistance heaters to actuate the thermally responsive contacts of the internal line break. The sensors and heaters are powered from an auxiliary winding in the motor coils. When applied to a hermetic scroll compressor, the compressor can be protected against reverse rotation.

Internal protection circuit for electrically driven device

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Cazenovia, NY, United States of America

James C Wilson