Thermo King Corporation

Mark Freese

Randy Scott Burnham

Neil D Tamppari

Alan D Gustafson

Dermott Crombie

A container for transporting a load in conditioned space air, where the container includes a number of walls defining a closed conditioned space with an ambient air intake opening and a conditioned space air exhaust opening provided on one of the container walls; a temperature control system for controlling the temperature of the conditioned space air; an ambient air exchange so system having a door movable relative to the exhaust and intake openings to thereby change the rate that conditioned space air is exchanged with ambient air, and a motor for repositioning the ambient air exchange door. The container also including a container controller in signal transmitting relation with the air exchange door repositioning motor. The controller sends signals to the repositioning motor to move the ambient air exchange door to a position which produces the required ambient air exchange rate to preserve the load.

Automatic ambient air control system and method for refrigerated container

A method and apparatus for controlling evaporator and condenser fans in a refrigeration system. The apparatus is a refrigeration system including a refrigerant circuit defined by a compressor, a condenser, a throttling device, and an evaporator. The apparatus includes an evaporator fan and a condenser fan. The apparatus also includes a controller coupled to the fans. The controller includes a variable frequency drive unit. For the method of the invention, the speed of the fans is controlled by the controller.

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Eagan, MN, United States of America

Mark Freese