Heat exchange – Casing or tank enclosed conduit assembly – Manifold formed by casing section and tube sheet of assembly
Reexamination Certificate
1998-08-14
2001-10-02
Lazarus, Ira S. (Department: 3743)
Heat exchange
Casing or tank enclosed conduit assembly
Manifold formed by casing section and tube sheet of assembly
C165S159000, C122S015100, C122S017200, C126S391100, C126S360100
Reexamination Certificate
active
06296050
ABSTRACT:
TECHNICAL FIELD
The present invention relates generally to heat exchangers.
BACKGROUND OF THE INVENTION
Heat exchangers are typically used to transfer heat from one fluid to another fluid. A common example of a heat exchanger is the radiator in a car which is used to cool the internal engine coolant. Hot engine coolant is pumped into the car's radiator, while at the same time ambient air passes over the radiator which cools the engine coolant. As such, heat is transferred from the engine coolant to the ambient air. Heat exchangers are also used to heat fluids. For instance, many industrial settings require heated tanks of liquids. Heat exchangers using gas powered burners are immersed in the tank which then heat the liquids within the tank.
SUMMARY OF THE INVENTION
An object of the invention is to provide an improved heat exchanger. Additional objectives, advantages and novel features of the invention will be set forth in the description that follows and, in part, will become apparent to those skilled in the art upon examining or practicing the invention. The objects and advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the appended claims.
One aspect of the present invention is a heat exchanger comprising a central chamber and a first manifold connected to the central chamber. A plurality of straight tubes each having a proximal end and a distal end are connected to the first manifold at the distal end. The straight tubes are positioned around the central chamber. A second manifold is connected to the proximal ends of the straight tubes and has an exhaust vent.
Another aspect of the present invention is a heat exchanger comprising a center tube having a proximal end, a distal end, and a flowpath extending from the proximal end to the distal end. A first set of tubes are positioned in a circumferential pattern at a first radius around the center tube. The first set of tubes each have a proximal end, a distal end in fluid communication with the distal end of the center tube, and a flowpath from the distal end to the proximal end. A second set of tubes are positioned in a circumferential pattern at a second radius around the center tube. Each of the second set of tubes have a proximal end, a distal end in fluid communication with the distal end of the center tube, and a flowpath from the distal end to the proximal end. A vent is in fluid communication with the proximal ends of the first and second sets of tubes.
Still another aspect of the present invention is a heat exchanger for heating a fluid in a container. The heat exchanger has a flange sealingly mounted to the container. A center tube, immersed in the fluid, has a proximal end and a distal end. A return manifold is connected to the distal end of the center tube and is immersed in the fluid. A first set of straight tubes are positioned in a circumferential pattern at a first radius around the center tube and parallel to the center tube. Each of the first set of tubes have a proximal end and a distal end connected to the return manifold. A second set of straight tubes are positioned in a circumferential pattern at a second radius around the center tube and parallel to the center tube. Each of the second set of tubes have a proximal ends ani a distal end connected to the return manifold. The first and second sets of straight tubes are immersed in the fluid. An exhaust manifold is connected to the proximal end of the first and second sets of tubes. The exhaust manifold has a vent located outside the container. A burner capable of producing heated gases is positioned in the exhaust manifold and connected to the proximal end of the center tube. A flowpath for heated gases extends from the burner to the distal end of the center tube, to the return manifold, to the distal ends of the first and second sets of the tubes, to the proximal ends of the first and second sets of the tubes, to the exhaust manifold, to the vent.
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Dinsmore & Shohl LLP
Lazarus Ira S.
McKinnon Terrell
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