WO2013063977A1 - Dispositif et procédé de chauffage à double induction électromagnétique à fréquence de courant triphasé pour liquide - Google Patents

Dispositif et procédé de chauffage à double induction électromagnétique à fréquence de courant triphasé pour liquide Download PDF

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Publication number
WO2013063977A1
WO2013063977A1 PCT/CN2012/080711 CN2012080711W WO2013063977A1 WO 2013063977 A1 WO2013063977 A1 WO 2013063977A1 CN 2012080711 W CN2012080711 W CN 2012080711W WO 2013063977 A1 WO2013063977 A1 WO 2013063977A1
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WO
WIPO (PCT)
Prior art keywords
heating device
short
circuit
liquid
magnetic
Prior art date
Application number
PCT/CN2012/080711
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English (en)
Chinese (zh)
Inventor
吴荣华
Original Assignee
Wu Ronghua
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201110340219.2A external-priority patent/CN102384577B/zh
Priority claimed from CN2011204280126U external-priority patent/CN202303839U/zh
Application filed by Wu Ronghua filed Critical Wu Ronghua
Publication of WO2013063977A1 publication Critical patent/WO2013063977A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/101—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium using electric energy supply
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/105—Induction heating apparatus, other than furnaces, for specific applications using a susceptor
    • H05B6/108—Induction heating apparatus, other than furnaces, for specific applications using a susceptor for heating a fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H2250/00—Electrical heat generating means
    • F24H2250/08—Induction

Definitions

  • the present invention relates to a power frequency electromagnetic induction short circuit and induction eddy current heating apparatus and method, and more particularly to a three-phase power frequency electromagnetic induction short circuit and induction eddy current heating apparatus and method for heating a liquid. Background technique
  • eddy current heating refers to an electrical heating that produces a Joule effect by a power frequency induced eddy current.
  • the working principle is that the alternating magnetic lines of force generate eddy currents and hysteresis in the conductor through the conductor, and the main effect of generating the Joule effect is eddy current, so it is called eddy current heating.
  • Short-circuit heating refers to an electrical heating that produces a Joule effect from a power-frequency induced short-circuit current.
  • Chinese patent ZL01134187.4 with the document number CN1142706C discloses a liquid three-phase power frequency electromagnetic induction and short-circuit heating device. This is the case. The working principle is that the secondary side is low according to the original secondary side turns ratio of the transformer. High voltage and current, in the above patent, the secondary side is 1 ⁇ , and short circuited to form a loop, so it is called short-circuit heating.
  • the part of the core is provided with a winding, and the core is not provided with a winding to form only a part of the yoke that constitutes the closed magnetic circuit.
  • the above patent creatively uses the metal casing as the secondary side, which closes the magnetic circuit along the three-phase.
  • the core and the primary winding are surrounded, so that three short-side secondary metal rings are formed on the core of the core, and four short-side secondary metal rings are formed on the yoke portion of the core, and a total of seven secondary short circuits are formed.
  • the above patent is hereinafter referred to as 7 secondary short-circuit heating device).
  • the secondary side metal rings of the metal casing When the primary side is connected to the three-phase power frequency power supply, the secondary side metal rings of the metal casing induce a short circuit and a large current; the secondary side metal rings of each phase are electrically connected to the same metal casing to generate phases and phases and between the three phases.
  • Short circuit high current.
  • the above two different short-circuit and large currents cause the metal casing to be rapidly heated.
  • the sum of the vectors of the three-phase short circuit is equal to zero, and the metal casing is zero potential during operation and is safe.
  • the above two kinds of short-circuit and large currents generate extraordinary magnetic flux leakage, which is also unusual for the thermal influence of the heating device, which is necessary for the development of commercial products, and the electric control box. Will affect normal operation.
  • the above patent does not mention short circuit leakage.
  • Figure 1 shows the magnetic field distribution (the boundary conditions are far enough) in the case of a transformer short circuit.
  • the primary and secondary sides have currents, and the magnetic fields generated by the currents of the two windings mostly cancel each other out.
  • the spatial distribution is mainly the leakage magnetic field (see “Engineering Electromagnetic Field”, Tsinghua University Press - 2004.9).
  • the magnetic induction intensity of the magnetic flux leakage of the above-mentioned seven secondary short-circuit heating devices having two different short circuits is inevitably larger than the magnetic induction intensity shown in FIG.
  • the object of the present invention is to provide a three-phase power frequency electromagnetic double induction heating device and a heating method for liquid, so that the leakage flux limit of the seven secondary short-circuit heating devices is stopped in the circulation box and is effectively utilized, and the heat effect during operation is further improved. High, safer and more reliable.
  • a metal plate using a ferromagnetic material has a magnetic permeability and a mechanism for generating eddy current and hysteresis, and is disposed around the 7-side short-circuit heating device, so that the short-circuit leakage occurs. It is effectively controlled and makes it an eddy current heating body.
  • the technical solution for realizing the three-phase power frequency electromagnetic double induction heating device (hereinafter referred to as double induction heating device) for liquid of the present invention is:
  • the double induction heating device of the present invention comprises 7 secondary short circuit heating devices, a circulation box and a piping system.
  • the secondary short-circuit heating device is fixed on the inner base in the circulation box, and the terminal block protrudes from the preset pipe hole on the vertical surface of the circulation box and is fixed by welding; the inlet manifold of the pipeline system passes through the front elevation of the circulation box The lower preset pipe hole passes through the inner base and is respectively welded and fixed; the inlet main pipe enters the circulation box and is divided into three outlets, and one road has 1 to 12 round hole outlets under the inlet main pipe at the inner base portion, and the other two paths are
  • An L-shaped branch pipe is arranged on the left and right sides of the inlet main pipe in front of the inner base, and the inlet of each L-shaped branch pipe is weldedly connected with the inlet main pipe, and the outlet is respectively welded and connected with the corresponding inlet pipe of the 7-side short-circuit heating device;
  • the upper end is provided with an outlet pipe;
  • the structural feature is:
  • the double induction heating device further comprises a ferromagnetic material magnetic guiding frame; the magnetic
  • the magnetic guide frame is in the shape of a "mouth" in a plan view, and the upper end is higher than the 7-side short-circuit heating device, and the lower end is up to
  • the bottom surface of the circulation box is surrounded by the seven sub-side short-circuit heating devices at a certain distance and uniform in spacing, thereby forming a passage for circulating liquid.
  • all circulating liquids to be heated pass through the passage from the bottom to the top, and the magnetic flux box induces the leakage magnetic flux generated by the 7-side short-circuit heating device to form a loop, and induces eddy current and hysteresis in the magnetic conductive frame. It is made into a vortex heating device, which simultaneously heats the liquid medium flowing through them with the above-mentioned seven secondary short-circuit heating devices, so that the short-circuit leakage is limited to the magnetic flux frame and is effectively controlled and utilized.
  • the magnetic conducting frame is made of a ferromagnetic metal plate, preferably a stainless steel plate or a steel plate having a thickness of 1 to 3 mm.
  • the passage between the above magnetic shielding frame and the 7-side short-circuit heating device may be determined by the flow rate of the liquid flowing through the passage of 0. dip 3 ⁇ 43 ⁇ 4, m.
  • the technical solution for the liquid three-phase power frequency electromagnetic double induction heating method for achieving the object of the present invention is: immersing the 7-side short-circuit heating device in the circulating liquid medium except that the terminal block protrudes out of the circulation box, so that it consumes Almost all of the active energy is converted into Joule heat; around the 7 secondary short-circuit heating devices A ferromagnetic material magnetic conductive frame is externally arranged to induce a magnetic flux leakage circuit generated by the 7-side short-circuit heating device, and induces eddy current and hysteresis in the magnetic magnetic frame to make it become a eddy current heating device, and leaks Magnetic is reactive; in this way, 7 secondary short-circuit heating devices that consume active energy and eddy current heating devices that consume reactive energy, and simultaneously heat the liquid medium flowing between them, that is, a 7-side short-circuit heating device is connected to three The phase power frequency power supply, and the heating liquid is the heating method of the two induction heating devices of short circuit and eddy
  • Figure 1 shows the magnetic field distribution in the case of a transformer short circuit.
  • Figure 3-a is a front view
  • Figure 3-b is a side view of Figure 3-a
  • Figure 3-c is a side view
  • Figure 3-a is a top view.
  • FIG. 4 is a schematic structural view of a three-phase power frequency electromagnetic double induction heating device of the present invention: wherein FIG. 4-a is a front view, FIG. 4-b is a side view of FIG. 4-a, and FIG. 4c is a side view of FIG. -a AA profile top view.
  • Fig. 5 is a set of commercial products of the three-phase power frequency electromagnetic double induction heating device of the present invention: wherein Fig. 5-a is a front view, and Fig. 5-b is a side view of Fig. 5-a.
  • Double induction heating device 50 flow guiding member 10, inlet branch pipe 11, outlet 12, circulation box 13, inner base 14, circular hole 15, inlet manifold 16, L-shaped branch 17, magnetic field guide 18, magnetic frame member 18- 1, the magnetic frame member 18-2, the channel 19,
  • Electric control box 60 7 secondary short-circuit heating device 30, rectangular tube 5, terminal block 6.
  • Fig. 2 shows a view of a magnetically permeable frame member 18-1 of the present invention.
  • Fig. 3 show a view of another member 18-2 of the magnetic permeable frame of the present invention.
  • the three views of Figure 4 show the dual induction heating device 50 of the present invention.
  • the seventh side short-circuit heating device 30 (the liquid three-phase power frequency electromagnetic induction and short-circuit heating device 30 in the patent document ZL01134187.4) is fixed to the inner base 14 in the circulation box 13 in such a manner that the terminal block 6 is located on the upper rear side.
  • the magnetic conductive frame member 18-2 has its circular hole passing through the terminal block 6 and its three sides are tightly covered on the inner side of the rear surface of the circulation box 13 and the left and right sides thereof, respectively, and welded and fixed; the magnetic magnetic frame member 18 of the above FIG. 2 is taken.
  • the circular hole of its size is respectively passed through the inlet manifold 16 and the inlet branch pipe 11 of the secondary short-circuit heating device, and the lower end thereof is welded and fixed to the bottom surface of the circulation box, and the left and right sides of the magnetic conductive frame member 18-2 are left and right.
  • a magnetically conductive frame 18 is formed on the periphery of the 7-side short-circuit heating device 30, and has a "mouth" shape in plan view, and its upper end is higher than the upper end surface of the short-circuit heating device 30, and the lower end is up to the circulation box 13
  • the bottom plate, the periphery and the 7-side short-circuit heating device 30 maintain a certain distance and the spacing is uniform, the magnetic frame 18 induces the leakage magnetic flux forming circuit of the 7-side short-circuit heating device 30, and forms a channel 19 for circulating liquid flow;
  • the liquid to be heated is pumped from the liquid storage tank (not shown) through the inlet manifold 16 into the magnetic conducting frame 18 of the circulation tank 13 by the circulation pump, and the water is discharged in three ways: one way is sprayed downward through the circular hole 15 and diffused.
  • the other two passes through the L-shaped branch 17 through the 7 inlet circular tubes 11 of the secondary side short-circuit heating device 30, enter the gap between the two rectangular tubes 5 and the flow guiding member 10, and then discharge from the other end of the two rectangular tubes 5 into the passage 19 (rectangular tube 5 and guide
  • the specific structure of the flow element 10 is detailed in the patent of ZL01134187.4).
  • the three-way liquid is short-circuited to the outer surface of the heating device 30 and the surface of the magnetic conductive frame 18 via the seven secondary sides, and the Joule heat generated by the short-circuit and the eddy current is discharged from the outlet 12 with the heated liquid, and is returned to the storage tank, so that the cycle is repeated. , heat the liquid in the tank to the required temperature.
  • Figure 2 is a view showing a kit 500 of the double induction heating device of the present invention, which is taken from the double induction heating device 50 of Figure 4, and the protective casing 51 is mounted on the frame 54, which is connected to the electric control box.
  • 60 is mounted on the same base 56, a fixed structure; an insulation layer (not shown) is disposed between the heating device 50 and the protective casing 51, and a drain valve 55 is provided at the bottom of the heating device 50 at the inlet 16 thereof.
  • An inlet temperature sensor 52 and a pressure sensor 53 are disposed on the pipeline, and an outlet temperature sensor 57 is disposed on the pipeline of the outlet 12; the low-voltage electrical appliance selected by the matched electrical control box can effectively detect short-circuit, over-current, and Fault signals such as leakage, and signals detected from the above sensors, such as the outlet water temperature, the temperature difference between the inlet water and the pressure, are sent to the PLC program controller, and then the PLC sends a control or alarm signal according to the programmed program to realize unmanned, safe automatic run.
  • the first 7-side short-circuit heating device 30 is directly exposed to the air, which is far enough according to the boundary conditions of FIG. That is, there are no metal parts in the range of 5 times the height dimension.
  • the relevant data of the 7-side short-circuit heating device 30 are shown in the following table number 1; the other 2 7-side short-circuit heating devices 30 are respectively in accordance with ZL01134187.4 patent
  • the magnetic enclosure 18 is not provided, and the magnetically permeable frame 18 of the present invention is assembled into a kit 100 as shown in FIG.
  • the material of the circulation box 13 is 304 stainless steel, the circulating medium is water, the material Q235 of the protective casing 51, and the heat preservation conditions are the same.
  • the relevant data of the actual measurement are shown in the following table No. 2 and No. 3. It can be clearly seen from the table that the boundary conditions of the 7-side short-circuit heating device 30 are different, and the parameters are different, and the largest variation is the reactive power: No. 1 boundary condition is far enough, and the reactive power consumed is the least Excitation reactive power consumption, including magnetic flux leakage; secondly, no. 2, 7 sub-side short-circuit heating device 30 is surrounded by no magnetic frame 18, reactive power is larger than that of serial number 1, and the temperature rise of the protective casing 51 is protected.
  • the height is the magnetic flux leakage of the secondary short-circuit heating device 30; the serial number 3 is the invention, and the magnetic shielding frame 18 is disposed around the secondary short-circuit heating device 30, and the reactive power is increased the most, and the temperature rise of the protective casing 51 is protected.
  • the measured thermal efficiency ⁇ reaches 1.108, and it is obvious that this is the leakage current of the 7-side short-circuit heating device 30, which causes eddy currents in the magnetic frame 18!
  • the magnetic flux leakage is reactive
  • the magnetic energy is also energy, and can be converted into thermal energy.
  • the measured data in the table is of considerable value for the determination of the reactive power equivalent of the short-circuit leakage magnetic energy converted into thermal energy in the future.
  • the magnetic frame is both magnetically conductive and diverted. It increases the flow rate of all circulating liquids through the passage between the short circuit and the eddy current heating device, and the heat exchange is more sufficient.
  • the measured temperature rise of the primary winding decreases by 7.2K. It is advantageous to shorten the service life of the heating device.
  • the magnetic frame limits the leakage flux, and the measured temperature rise of the protective casing drops from 57K to 15K, ensuring safe operation.
  • the magnetic frame converts the reactive short-circuit leakage magnetic energy into heat energy, and the measured thermal efficiency is increased from 0.977 to 1.108, which is 11.1% higher, saving energy and saving money.
  • the invention further improves and perfects ZL01134187.4, and the cost is small, and the energy saving and economic effects are very good.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • General Induction Heating (AREA)

Abstract

L'invention concerne un dispositif de chauffage à double induction électromagnétique à fréquence de courant triphasé pour liquide qui comprend : un dispositif de chauffage à court-circuit secondaire en 7 parties (30), un boîtier de circulation (13), un système de tuyauterie, et un cadre magnétique (18). Le dispositif de chauffage à court-circuit secondaire en 7 parties (30) est fixé sur une base inférieure interne (14) dans le boîtier de circulation (13). Le système de tuyauterie comprend un tuyau d'entrée de collecteur (16), un tuyau de branchement en « L » (17), et un tuyau de sortie. Le cadre magnétique (18) est réalisé en matériau ferromagnétique, et un espace uniforme est maintenu entre les quatre côtés du cadre magnétique (18) et le dispositif de chauffage à court-circuit secondaire en 7 parties (30) pour réaliser un passage (19) qui laisse circuler le liquide. L'invention concerne en outre un procédé de chauffage à double induction électromagnétique à fréquence de courant triphasé pour liquide qui consiste à : tremper un dispositif de chauffage à court-circuit secondaire en 7 parties (30) dans un milieu liquide en circulation ; induire un flux de fuite généré par le dispositif de chauffage à court-circuit secondaire en 7 parties (30) au moyen d'un cadre magnétique (18) placé autour du dispositif de chauffage à court-circuit secondaire en 7 parties (30) dans le but de former une boucle, ce qui entraîne un courant de Foucault ; et chauffer le milieu liquide au moyen du chauffage par court-circuit et du chauffage par courant de Foucault simultanément.
PCT/CN2012/080711 2011-11-01 2012-08-29 Dispositif et procédé de chauffage à double induction électromagnétique à fréquence de courant triphasé pour liquide WO2013063977A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201110340219.2A CN102384577B (zh) 2011-11-01 2011-11-01 液用三相工频电磁双重感应加热装置
CN2011204280126U CN202303839U (zh) 2011-11-01 2011-11-01 液用三相工频电磁双重感应加热装置
CN201120428012.6 2011-11-01
CN201110340219.2 2011-11-01

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WO2013063977A1 true WO2013063977A1 (fr) 2013-05-10

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0383272A2 (fr) * 1989-02-17 1990-08-22 Nikko Corporation Ltd. Elément de chauffage à induction à basse fréquence
FR2713871A1 (fr) * 1993-12-15 1995-06-16 Bolcato Robert Dispositif de réchauffage d'un fluide par champ électromagnétique.
CN1356856A (zh) * 2001-11-18 2002-07-03 吴荣华 液用三相工频电磁感应及短路加热装置和方法
WO2006006946A1 (fr) * 2004-07-09 2006-01-19 Fos International S.A. Procede de traitement de milieux fluides et chauffage a induction afferent
CN200980177Y (zh) * 2006-12-05 2007-11-21 陈炳炎 工频感应金属短路腔体液相磁化加热装置
CN102384577A (zh) * 2011-11-01 2012-03-21 吴荣华 液用三相工频电磁双重感应加热装置和方法
CN202303839U (zh) * 2011-11-01 2012-07-04 吴荣华 液用三相工频电磁双重感应加热装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0383272A2 (fr) * 1989-02-17 1990-08-22 Nikko Corporation Ltd. Elément de chauffage à induction à basse fréquence
FR2713871A1 (fr) * 1993-12-15 1995-06-16 Bolcato Robert Dispositif de réchauffage d'un fluide par champ électromagnétique.
CN1356856A (zh) * 2001-11-18 2002-07-03 吴荣华 液用三相工频电磁感应及短路加热装置和方法
WO2006006946A1 (fr) * 2004-07-09 2006-01-19 Fos International S.A. Procede de traitement de milieux fluides et chauffage a induction afferent
CN200980177Y (zh) * 2006-12-05 2007-11-21 陈炳炎 工频感应金属短路腔体液相磁化加热装置
CN102384577A (zh) * 2011-11-01 2012-03-21 吴荣华 液用三相工频电磁双重感应加热装置和方法
CN202303839U (zh) * 2011-11-01 2012-07-04 吴荣华 液用三相工频电磁双重感应加热装置

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