A heat exchanger for heating or cooling a liquid, comprises a stationary outer shell and an drum rotatable coaxially in the shell. The outer periphery of the drum is adjacent the inner periphery of the shell and a stationary heat exchanger is disposed within the drum. Liquid to be heated or cooled is fed into the drum past the stationary heat exchanger and then between the outer periphery of the drum and the inner periphery of the shell. Impeller structure is disposed on the and extends axially along the outer periphery of the drum, such as a helicoidal vane, to more move the liquid is a circuitous path along the inner periphery of the stationary shell upon rotation of the drum.
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1. A heat exchanger for heating or cooling a liquid, comprising a stationary outer shell, a drum rotatable coaxially in the shell, the outer periphery of the drum being adjacent the inner periphery of the shell, stationary heat exchange means within the drum, means to feed a liquid into the drum past said stationary heat exchange means and then between said outer periphery of said drum and said inner periphery of said shell, and impeller means on and extending axially along said outer periphery of said drum to move said liquid in a circuitous path along said inner periphery of said stationary outer shell upon rotation of said drum.
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10. For use in an exterior heat utilization circuit, a compact heat exchange unit comprising two fluid connections for connecting said unit with said utilization circuit for the input to and outlet of heat exchange fluid from said circuit, said unit comprising:
(a) a heating wall for heating said fluid and a heating chamber extending along said heating wall; (b) means for heating said heating wall to provide more than about 1.8 W/cm2 to said heat exchange fluid; (c) a pump for circulating said fluid over said heating wall through said heating chamber; and (d) stirring means for stirring said fluid circulating in said heating chamber and including means immediately adjacent to said heating wall for preventing localized overheating in said fluid resulting in decomposition thereof by sweeping said fluid from said heating wall. 11. The heat exchange unit as defined by
For use in an exterior heat utilization circuit, a compact heat exchange unit for circulating a heat exchange fluid in said utilization circuit; said unit comprising two fluid connections for connecting said unit with said utilization circuit for the input to and outlet of heat exchange fluid from said circuit, said unit further comprising: (a) a heating wall for heating said fluid and a heating chamber extending along said heating wall for heating said fluid; (b) means for heating said heating wall to provide more than about 1.8 W/cm2 to said heat exchange fluid; (c) stirring means for stirring said fluid circulating in said heating chamber and including means immediately adjacent to said heating wall for preventing localized overheating in said fluid resulting in decomposition thereof by sweeping said fluid from said heating wall; and (d) in addition to said stirring means, a pump mounted coaxially with said stirring means, for circulating said fluid through said circuit and over said heating wall through said heating chamber. 27. For use in an exterior heat utilization circuit, a compact heat exchange unit for circulating a heat exchange fluid in said utilization circuit; said unit comprising two fluid connections for connecting said unit with said utilization circuit for the input to and outlet of heat exchange fluid from said circuit, said unit further comprising: (a) a heating wall for heating said fluid and a heating chamber extending along said heating wall; (b) means for heating said heating wall to provide more than about 1.8 W/cm2 to said heat exchange fluid; (c) stirring means for stirring said fluid circulating in said heating chamber and including means immediately adjacent to said heating wall for preventing localized overheating in said fluid resulting in decomposition thereof by sweeping said fluid from said heating wall; and (d) in addition to said stirring means, a pump mounted coaxially with said stirring means and driven by a single common driveshaft with said stirring means, for circulating said fluid through said circuit. 28. For use in an exterior heat utilization circuit, a compact heat exchange unit for circulating and maintaining the temperature of a heat exchange fluid in said utilization circuit; said unit comprising two fluid connections for connecting said unit with said utilization circuit for the input and outlet of heat exchange fluid from said circuit, said unit further comprising: (a) a heating wall for heating said fluid and a heating chamber extending along said heating wall; (b) means for heating said heating wall to provide more than about 1.8 W/cm2 to said heat exchange fluid; (c) cooling means for cooling said heat exchange fluid; (d) stirring means for stirring said fluid circulating in said heating chamber extending along said heating wall and including means immediately adjacent to said heating wall for preventing localized overheating in said fluid resulting in decomposition thereof by sweeping said fluid from said heating wall; and (e) in addition to said stirring means, a pump mounted coaxially with said stirring means and driven by a single common drive shaft with said stirring means, for circulating said fluid through said circuit and over said heating wall through said heating chamber. 29. For use in an exterior heat utilization circuit, a compact heat exchange unit for circulating and maintaining the temperature of a heat exchange fluid in said utilization circuit; said unit comprising two fluid connections for connecting said unit with said utilization circuit for the input to and the output of heat exchange fluid from said circuit, said unit further comprising: (a) a heating wall for heating said fluid and a heating chamber extending along said heating wall; (b) means for heating said heating wall to provide more than about 1.8 W/cm2 to said heat exchange fluid; (c) cooling means for cooling said heat exchange fluid; (d) means for sensing the output temperature of said heat exchange fluid from said unit and for regulating said cooling and heating means to maintain said fluid at a desired temperature; (e) stirring means for stirring said fluid circulating in said heating chamber extending along said heating wall and including means immediately adjacent to said heating wall for preventing localized overheating in said fluid resulting in decomposition thereof by sweeping said fluid from said heating wall; and (f) in addition to said stirring means, a pump mounted for circulating said fluid through said circuit and over said heating wall through said heating chamber. 30. For use in an exterior heat utilization circuit, a compact heat exchange unit for circulating and maintaining the temperature of a heat exchange fluid in said utilization circuit; said unit comprising two fluid connections for connecting said unit with said utilization circuit for input to and outlet of heat exchange fluid from said circuit, said unit further comprising: (a) a heating wall for heating said fluid and a heating chamber extending along said heating wall; (b) heating means for heating said heating wall to provide more than about 1.8 W/cm2 to said heat exchange fluid; (c) cooling means for cooling said heat exchange fluid; (d) means for sensing the output temperature of said heat exchange fluid from said unit and for regulating said cooling and heating means to maintain said fluid at a desired temperature; (e) stirring means for stirring said fluid circulating in said heating chamber extending along said heating wall and including means immediately adjacent to said heating wall for preventing localized overheating in said fluid resulting in decomposition thereof by sweeping said fluid from said heating wall, and means for operating said stirring means to provide a fluid velocity of at least about 10 meters/second through said heating chamber; and (f) in addition to said stirring means, a pump mounted for circulating said fluid through said circuit and over said heating wall through said heating chamber. |
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The FIGURE illustrates the invention with a single or multiple thread screw. 1,8 1.8 W/cm2, except with the risk of relatively fast decomposition of the oil.
Furthermore, in the thermal exchanger according to the invention, even in the case of voluntary or not stopping of the fluid circulation in the external circuit, said fluid continues to circulate on the heating surfaces, as long as the endless screw is driven in rotation, thus eliminating any risk of decomposition of the oil by overheating.
All the original elements of this invention, which have been mentioned in reference to the particular embodiment described, allow reduction of the size of a heating device of a fluid by a factor of about 5.
Of course, a device analogous to that described in reference to the single annexed drawing can be used as a thermal exchanger for the cooling of a fluid. For this, it is merely advisable on the one hand to replace the external heating means I by external cooling means, for example a circuit of a refrigerating fluid, and on the other hand to provide for the circulation of an heated fluid in the chamber 9' according to the arrows IV and V, so as to obtain a more efficacious thermostatisation.
The thermal exchanger according to the invention, when used as a cooling device for a fluid presents the advantages on one hand of allowing, as in the case of the heating device, an important reduction of the size with regards to the known devices, with the same cooling power and efficiency, and on the other hand to avoid, owing to the continuous forced circulation against the cooling walls, undesired modifications of the viscosity or even a partial cristallization crystallization of the fluid due to local overcooling.
Although the present invention has been described and illustrated in connection with a preferred embodiment, it is to be understood that modifications and variations may be restored to without departing from the spirit of the invention, as those skilled in this art will readily understand. Such modifications and variations are considered to be within the purview and scope of the present invention as defined the appended claims.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Jun 11 1982 | PIOTROWSKI, TADEUSZ | EUROBURNER , A CORP OF LIECHTENSTEIN | ASSIGNMENT OF ASSIGNORS INTEREST | 004040 | /0659 | |
| Aug 10 1982 | Etablissement Euroburner | (assignment on the face of the patent) | / |
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