Heat exchange – With agitating or stirring structure
Patent
1984-10-18
1986-03-25
Davis, Jr., Albert W.
Heat exchange
With agitating or stirring structure
138 38, 165174, F28F 1312
Patent
active
045776814
ABSTRACT:
A heat exchanger for a combustion unit having particular use with a water heater. The heat exchanger includes a plurality of generally parallel tubes disposed in a water heater tank in contact with the water to be heated and waste gases of combustion pass through the heat exchanger tubes. A turbulator is disposed in each tube to increase the heat transfer from the waste gases to the water in the tank. Each turbulator is formed from a generally flat strip of metal and has a plurality of transverse slits that extend more than one-half the width of the strip and terminate at a base. Generally triangular portions or tabs bordering each slit are bent outwardly and the tabs are disposed generally normal to the strip. One tab bordering each slit extends laterally from one side of the strip, while the other tab bordering that slit extends laterally from the opposite side of the strip. The end portion of the strip is bent about the base of a slit to position the end portion at an angle of about 30.degree. with respect to the remainder of the strip. The bent end portion enables the strip to be firmly engaged within the heat exchanger tube so that it will not be displaced during service and yet can be readily removed for maintenance or replacement.
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A. O. Smith Corporation
Davis Jr. Albert W.
Smith Randolph A.
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