SU1236264A2 - Induction heater of fluid medium - Google Patents

Description

The invention relates to a power system, can be used in heaters for liquids and gases and is an improvement of the invention according to the basic author. St. No. 886329.

The purpose of the invention is to increase the efficiency of heating by intensifying the heat supply.

FIG. 1 shows an induction fluid heater, longitudinal section; in fig. 2 is a section A-A in FIG. one.

The induction fluid heater contains a magnetic core 1 placed inside an annular dielectric chamber 2 with an inlet and outlet nozzles 3 and 4 cooled by the medium and uniformly wound on its surface by a primary winding 5 located inside a corrugated ring short-circuited chamber 6 forming a secondary winding and enclosed by a casing 7 with inlet and outlet connections 8 and 9 for supplying a heated medium. The inlet 8 is provided with a confusing nozzle 10, which is inserted into the casing 7. Radial corrugations 11 are made on the end walls of chamber 6, on the projections 12 of which a transverse plate 13 is formed from the outlet branch 9 side 9, forming an annular gap 14 with a wall of the casing 7. The corrugations 11 are asymmetric with larger and smaller slopes 15 and 16. On the side walls of the chamber 6, asymmetric radial corrugations 17 are also made with larger and smaller slopes 18 and 19, the latter directed in one direction opposite to the smaller x slopes 16 corrugations 11 end walls of the chamber 6, and the tops of the projections of each pair of opposite corrugations 17 of the side walls of the chamber 6 are located in the same plane with the vertices of the corresponding pair of opposite corrugations 1 of the end walls.

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The device works as follows.

When voltage is applied to the primary winding 5 in the secondary winding formed by the short-circuited chamber 6, a current of significant magnitude (short-circuit current) is induced, causing it to heat. The heated medium entering the casing 7 through the nozzle 8 is pressed by the nozzle 10 and directed into the central cavity enclosed by the corrugated annular chamber 6 along the cavities of the radial corrugations 17. At the same time, the energy of the fluid jet carries along a cavity of the upper radial corrugations 11 heating up from the heat-dissipating surface of the chamber 6. The plate 13 then guides the flow along the lower corrugations 11, then the fluid flow splits into the inner walls of the casing 7. A part of the flow returns to the nozzle 10, and the rest through the annular gap 14 out of the casing 7 and the pipe 9 is heated. Around the surface of the annular chamber 6 along its corrugations 11 and 17 a recirculation loop is formed in the form of a toroidal vortex, which intensifies the flow of fluid1 1 and the heat removal from the heat-generating surface of chamber 6. The execution of OFR 11 and 17 is asymmetric and the direction of their smaller slopes 16 and 19, in different directions, organizes along them additional vortex structures that intensify (especially in narrow corner zones) the heat and mass transfer process. The cooling of the primary winding 5 and the magnetic conductor 1 is carried out by supplying a cooling medium into the space between the surface of the magnetic circuit 1 and the inner surface of the dielectric annular chamber 2.

The organization of recirculation of the south contour along the corrugations 11 and 17 of the annular short-circuited chamber 6 makes it possible to intensify the loss of the fluid and to save energy on its flow.

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FIG. 2

Circulation 649 Subscription

Branch PPP "Patent, Uzhgorod, st. Project, 4

Claims (2)

1. INDUCTION HEATER OF FLUID by ed. St. No. 886329, characterized in that, in order to increase heating efficiency by intensifying heat removal, the inlet pipe is equipped with a confuser nozzle inserted into the casing, the output section of which is less than or equal to the cross-sectional area of the annular short-circuited chamber with radial corrugations made on its end walls, on the protrusions which transverse plate is installed on the outlet side, forming an annular gap with the casing wall. 2. Heater according to π. 1, characterized in that all the corrugations of the annular short-circuited chamber are asymmetric with larger and smaller slopes, the last of which are directed in the corrugations of the side walls of the chamber in one direction, and in the corrugations of the end walls in the opposite direction, with the vertices of the protrusions of each pair of opposite corrugations of the side the walls are located in the same plane with the vertices of the corresponding pair of opposite corrugations, end walls. Fig t 1236264 A 2