Advanced Heat Transfer LLC

Lennox Industries Inc.

Lennox International Inc.

Luvata Grenada LLC

Michael E Heidenreich

Younglib Bae

William George Abbatt

Hailing Wu

William G Abbatt

The invention involves a flat fin heat exchanger configurationwith a plurality of louversthat are raised above the plane of the finbetween adjacent tube holesthat receive tubes. Various alternative patterns of louvers enhance the heat transfer characteristics of the fin, and allow for the use of thinner materials to lower cost without diminishing performance. The exterior fin surface redirects air flow from the leading edge to the trailing edge of the fin. This effect directs the air flow over and in between the interrupted surfaces, thus breaking up air boundary layer around the fin. The louvers of the fin are oriented relative to the air flow in such a manner that each louver in effect creates another leading edge, thus contributing to a higher heat transfer coefficient.

Fin structure for heat exchanger

A refrigerant distribution devicesituated in an inlet headerof a multiple tube heat exchangerof a refrigeration system. The deviceincludes an inlet passagethat is in communication with an expansion device. Small diameter conduitsare disposed within the inlet headerand are in fluid communication with the inlet passage. A two-phase refrigerant fluid in the inlet passagehas a refrigerant liquid-vapor interface. The conduitshave inlet portsthat lie below the refrigerant liquid-vapor interface. Vapor emerging from the nozzlescreate a homogeneous refrigerant that is uniformly delivered to the multiple tubes. The invention also includes a method for delivering a uniform distribution of a homogeneous liquid mixture of liquid and vaporous refrigerant through the heat exchanger tubes.

Refrigerant distribution device and method

A refrigerant distribution devicesituated in an inlet headerof a multiple tube heat exchangerof a refrigeration system. The deviceincludes an inlet passagethat is in communication with an expansion device. Small diameter nozzlesare disposed within the inlet headerand are in fluid communication with the inlet passage. Capillary liquid nozzlesalso lie within the inlet headerand are in fluid communication with the inlet passage. A two-phase refrigerant fluid in the inlet passagehas a refrigerant liquid-vapor interface. The vapor nozzleshave vapor inlet portsthat lie above the refrigerant liquid-vapor interface. The capillary liquid nozzleshave liquid inlet portsthat lie below the refrigerant liquid-vapor interface. Vapor emerging from the vapor nozzlesblow onto and atomize liquid emerging from the liquid nozzle to create a homogeneous refrigerant that is uniformly delivered to the multiple tubes. The invention also includes a method for delivering a uniform distribution of a homogeneous liquid mixture of liquid and vaporous refrigerant through the heat exchanger tubes.

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Olive Branch, MS, United States of America

Michael E Heidenreich