JP2009257690A - Electrode bar for electromagnetic wave heating, and electromagnetic water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small, simply-structured, and inexpensive electrode bar for electromagnetic wave heating without requiring a high-frequency oscillator and magnetron, and to provide a small, simply-structured, and inexpensive electromagnetic water heater heating flowing water by using the electrode bar. <P>SOLUTION: The electrode bar 1 for the electromagnetic heating is so formed that 1.5-2.5 wt.% Fe powder is added to cement-based material with cement material mixed with at least expansive admixture and a hydrated filler 2 is filled into a metal pipe 3. The electromagnetic water heater 10 generates a magnetic wave in the inside of each electrode bar by feeding a commercial AC power supply to an electrode bar assembly 5 having a plurality of positive electrode bars 1a and negative electrode bars 1b respectively filled with the filler 2, and heats water flowing around each electrode bar. Accordingly, the flowing water in a case 6 is heated. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electrode for electromagnetic wave heating, an electrode rod used as an electromagnetic wave generator, and an electromagnetic water heater using the same.

  In general, an electric water heater (for example, Patent Document 1) that supplies hot water by heating water in a hot water storage tank with an electric heater is known as a hot water supply device. In this electric water heater, the water level is detected by an electrode provided in the hot water storage tank, and water is supplied when the water level becomes low. There is also known a boiler that stores hot water heated by burning heavy oil in a hot water storage tank and supplies a required amount of hot water with a hot water pump.

By the way, electromagnetic heating such as dielectric heating and microwave heating is known as a method for heating foods and resins. In the dielectric heating, a high frequency voltage is applied to the plate-like electrodes to heat the object to be heated between the electrodes with a high frequency electric field (for example, Patent Document 2). In microwave heating, a microwave is generated by a magnetron using a commercial AC power source or the like, and the object to be heated is heated by the microwave.
Japanese Patent Laid-Open No. 5-001854 Japanese Patent Laying-Open No. 2005-085660

  However, conventional electric water heaters and boilers heat the water in the hot water storage tank, not the continuous running water, so there is a limit to continuous hot water supply. Therefore, it is difficult to reduce the size and cost.

  On the other hand, the conventional dielectric heating of electromagnetic heating requires a high frequency oscillator for applying a high frequency voltage to the plate electrode, and the microwave heating requires a magnetron that generates a high frequency. It becomes cost, and continuous flowing water cannot be heated with a simple structure and low cost.

  The present invention solves the above problems, eliminates the need for a high-frequency oscillator or a magnetron, and has a small and simple structure and a low-cost electrode rod for heating electromagnetic waves, and a small and simple structure using the electrode rod. And it aims at providing the electromagnetic water heater which can heat continuous flowing water at low cost.

  In order to achieve the above object, an electrode rod for heating electromagnetic waves according to the present invention comprises a cement material obtained by mixing at least an expansive admixture with a cement material, and Fe powder having a weight ratio of 1.5% to 2.5%. The filler that has been added and hydrated is filled into the metal pipe.

  According to this configuration, by supplying electric power from a commercial AC power source to the electrode rod filled with the filler, an electromagnetic wave is generated by the filler inside the electrode rod alone. Therefore, it is possible to obtain a low-cost electrode rod for heating an electromagnetic wave with a simple structure without using a high-frequency oscillator or a magnetron.

Preferably, the filler includes a grout material as the cement-based material, and Fe powder having a weight ratio of 1.5% to 2.5% is added thereto, and the Fe is included by water hydration reaction. An ethrin guide made of 3CaO.Al ₂ O ₃ .3CaSO ₄ .32H ₂ O is produced. Therefore, a stable molecular structure can be obtained by generating an ethrin guide containing Fe inside the electrode rod, and a more stable electrode rod for electromagnetic wave heating can be obtained.

  Preferably, a plurality of electrode bars each having at least one plus pole and one minus pole, wherein the plus pole and the minus pole electrode bars are spaced apart from each other in a direction orthogonal to the axial direction, When electric power is supplied to each electrode rod from a commercial AC power source, electromagnetic waves are generated inside each electrode rod, and water or other dielectrics between the electrode rods can be heated. Therefore, by supplying power from the commercial AC power source to the positive and negative electrode rods filled with the filler, electromagnetic waves are generated inside the electrode rods, and water or other dielectrics between the electrode rods are generated. Since heating is performed, each electrode bar itself becomes an electromagnetic wave heating electrode and an electromagnetic wave generator. Therefore, a low-cost electrode bar for electromagnetic wave heating can be obtained with a simple structure without using a high-frequency oscillator or a magnetron.

  An electromagnetic water heater according to another configuration of the present invention is provided with a plurality of electrode rods as described above, and each electrode rod is supplied with power from a commercial AC power source, and the electrode rod assembly is accommodated. A case having a water supply port and an outflow port, wherein water from the water supply port flows around each electrode rod and flows out from the outflow port, and a detection unit for detecting at least the temperature and flow rate of the water in the case And a controller that controls the temperature and flow rate of the water based on the detection signal, and heats continuous flowing water in the case by electromagnetic wave heating by the electrode rods.

  According to this configuration, by feeding power from a commercial AC power source to an electrode rod assembly having a plurality of positive and negative electrode rods filled with the filler, electromagnetic waves are generated inside each electrode rod, Since the water flowing around the electrode rod is heated, the continuous flowing water in the case can be heated with a simple structure and low cost.

  Preferably, the electrode rod assembly includes a pair of electrode rod contact plates disposed opposite to each other in the axial direction of each electrode rod, and an electrode rod holding portion that holds each electrode rod, In the pair of electrode rod contact plates, one electrode rod contact plate is electrically in contact with one end of a plurality of positive electrode rods, and the other electrode rod contact plate is electrically in contact with one end of a plurality of negative electrode rods. The electrode rod holder electrically insulates a plurality of positive and negative electrode rods arranged alternately and spaced apart in a direction perpendicular to the axial direction of the electrode rod. Hold while. Therefore, a plurality of positive electrode rods are in contact with one electrode rod contact plate, a plurality of negative electrode rods are in contact with the other electrode rod contact plate, and the positive and negative electrode rods are staggered. Since it is arranged and held, a large number of electrode bars can be efficiently arranged between the pair of electrode bar contact plates, and the apparatus can be miniaturized.

  Preferably, a plurality of electrode rod assemblies are provided in the case. Therefore, it is possible to sequentially heat the running water with the electrode rod assembly of each layer. Preferably, the electrode rod assembly is fixed to a frame that supports the electrode rod assembly, and a hanging tool capable of suspending the electrode rod assembly is fixed to the frame. Therefore, since the electrode rod assembly can be lifted and the entire electrode rod can be removed from the case, maintenance such as cleaning becomes easy.

  In the electromagnetic water heater system according to another configuration of the present invention, a plurality of the electromagnetic water heaters are connected, and water can be continuously supplied by sequentially flowing water to each electromagnetic water heater and sequentially heating it. It is.

  According to this configuration, since water is continuously flowed and heated sequentially in each electromagnetic water heater, continuous hot water can be heated more reliably by heating the continuous flowing water. Is possible.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an electrode rod for heating electromagnetic waves according to a first embodiment of the present invention. This electrode rod 1 is made of a filler 2 hydrated by adding Fe powder having a weight ratio of about 1.5% to 2.5% to a cement material obtained by mixing at least an expandable admixture with a cement material, such as stainless steel. The metal pipe 3 having a bottom with corrosion resistance is filled.

  In use, the electrode rod 1 is composed of a plurality of electrode rods each having at least one kind of positive electrode rod 1a and negative electrode rod 1b. 1A is covered with a stainless-steel contact cap 21 having a diameter larger than the outer diameter of the electrode rod on the tip sealed after the filler 2 is filled. Thus, when the positive electrode rod 1a is inserted into a holding hole 25 (FIG. 3 (B)) of the electrode rod contact plate 7 described later, the contact portion 1aa and the electrode rod 1a are prevented from coming off. The rear end is covered with an insulating cap 22 made of plastic as necessary. The negative electrode electrode 1b shown in FIG. 1B has a contact projection 23 made of stainless steel attached to the end sealed after the filler 2 is filled. The electrode contact plate 7 is contacted at the electrical contact portion 1bb. The other end is covered with an insulating cap 24 made of plastic as necessary.

The filler 2 uses, for example, a grout material as a cementitious material, and an Fe powder such as iron sand having a weight ratio of about 1.5% to 2.5% is added to the filler material, and at least by water hydration reaction. comprising the Fe, it is obtained by generating a _{3CaO · Al 2 O 3 · 3CaSO} 4 · 32H 2 O consisting et Trinh guide. The grout material is composed of cement material, expansive admixture (hardening shrinkage relaxation material), water reducing material including fluidizing material, bitumen emulsion, fine aggregate, etc., and contains at least components of Ca, Al, SO, Mg, Fe. Contains cementitious materials. The produced ethrin guide can maintain a stable state without causing shrinkage due to hardening and drying of the cement. In this example, a grout material is used as the cement-based material, but the present invention is not limited to this, and a predetermined expansive admixture or the like is mixed with Portland cement or other cement material to form an ettring guide. Any material that can maintain a corresponding stable state can be used.

By adding Fe powder in a weight ratio range of about 1.5% to 2.5% to the grout material, together with components of Ca, Al, SO, Mg, Fe, 3CaO.Al ₂ O _3. An ethrin guide consisting of 3CaSO ₄ .32H ₂ O is generated. As a result, 3CaO.Al ₂ O ₃ .3CaSO ₄ .32H ₂ O (E) containing Ca, Al, SO, and Mg, in which Fe is slightly increased, is contained in the electrode rod supplied with power from the commercial AC power source. Based on the trin guide), current flows from various angles by molecular structures with different electrical conductivities to generate a magnetic field as well as an electric field, and electromagnetic waves within an appropriate range are generated by the alternating induction of this electric field and magnetic field. , Is estimated.

  In the state where at least one of the positive electrode rod 1a and the negative electrode rod 1b having the above-described configuration is opposed to each other in a direction perpendicular to the axial direction, commercial AC is applied to each electrode rod 1a, 1b. By supplying electric power from the power source, electromagnetic waves can be generated inside the electrode rods, respectively, to heat a dielectric such as water or other liquid between the electrode rods 1a and 1b.

  As a result, appropriate electromagnetic waves that can be heated by electromagnetic waves can be obtained inside the electrode bars 1a and 1b that are fed from a commercial AC power source. Therefore, the electrode bars themselves serve as electromagnetic wave heating electrodes and electromagnetic wave generators. Compared with the electric heater of the electric water heater, a heating rate and a heating power that are remarkably superior can be obtained, and a high-frequency oscillator and a magnetron are not required, and a low-cost electrode rod for electromagnetic wave heating can be obtained with a small and simple structure. Moreover, stable electromagnetic heating can be obtained by using the filler 2 that has generated a stable ethrin guide.

  In the filler 2, the amount of Fe powder added to the cementitious material is preferably in the range of about 1.5% to 2.5% by weight, and in the range of 1.7% to 2.3%. More preferably, it is more preferably in the range of 1.9% to 2.1%. Within 1%, a desired electromagnetic wave cannot be generated, and when it is 3% or more, excessive Fe erodes the components of the ethrin guide and cannot be used as the electrode rod 1 of the present invention.

  FIG. 2 shows an electromagnetic water heater using a plurality of the electrode rods 1 according to the second embodiment of the present invention. This electromagnetic water heater 10 is provided with a plurality of positive and negative electrode rods 1a, 1b, and an electrode rod assembly 5 in which power is supplied to each of the electrode rods 1a, 1b from a commercial AC power source. Case in which the assembly 5 is housed and has a water supply port 11 and an outlet 12, and water from the water supply port 11 flows around the electrode rods 1 a and 1 b and flows out from the outlet 12 as warm water. 6, a cover 13 that covers the upper portion of the case 6, a wiring cover 14 attached to the cover 13, and a drain drain pipe 15 that discharges drain and water in the case 6. The case 6 may be covered with a heat insulating material such as glass wool in order to prevent thermal diffusion. The electromagnetic water heater 10 heats the flowing water in the case 6 by electromagnetic wave heating of water flowing between the positive and negative electrode rods 1a and 1b.

  The electromagnetic water heater 10 controls the temperature and flow rate of the water in the case 6 and the entire device, and controls the temperature and flow rate of the water based on the detection signal from the detector. And a control unit 20 for controlling.

  In the detector, the temperature of the water in the case 6 is detected by a temperature sensor such as a water thermometer (not shown) provided in the upper and lower parts of the case 6 to obtain a detection signal (electric signal). The flow rate of water is detected, for example, by detecting the water level based on the current flowing between the electrode rods 1a and 1b in the case 6, and a detection signal (electric signal) is obtained. The controller 20 opens and closes an electromagnetic valve (not shown), adjusts the power (for example, supply current) from the commercial three-phase AC power source based on the detected water temperature, and controls the water temperature, Further, based on the detected flow rate of water, a throttle valve in a pipe (not shown) is adjusted to control the flow rate of water. The detector can detect the supply current.

  As shown in FIG. 3 (A), the electrode rod assembly 5 is disposed at, for example, a plurality of electrode rods 1a and 1b extending in the vertical direction and axial ends (upper and lower ends) of the electrode rods 1a and 1b. It has a pair of electrode rod contact plates 7 and 7 that face each other, and an electrode rod holding portion 8 that holds the electrode rods 1a and 1b.

  A plurality of, for example, three layers of the electrode bar assembly 5 are provided in the vertical direction in the case 6, and a commercial three-phase AC power source is wired to the electrode bar contact plate 7 of each layer. As shown in the electrical wiring diagram of FIG. 4, for example, three-phase loads u, v, and w-phase loads are connected to U, V, and W phases of a 200 V commercial three-phase AC power source. The u, v, and w phase loads are each composed of a plurality of positive electrode rods 1 a and negative electrode rods 1 b in each electrode rod assembly 5. In this example, the Y-Y connection is used, but a Y-Δ, Δ-Y, or Δ-Δ connection may be used.

  FIG. 3B is a partially enlarged view of FIG. The pair of electrode rod contact plates 7, 7 are made of a corrosion-resistant metal such as stainless steel, for example, and are provided with a plurality of holding holes 25 into which the electrode rods 1a, 1b can be inserted as shown in FIG. A plurality of positive electrode rods 1 a are inserted into the plurality of holding holes 25 of one electrode rod contact plate 7, respectively, and are in electrical contact with the electric contact portion 1 aa at the periphery of the bottom of the contact cap 21 at the tip. At the same time, the other electrode rod contact plate 7 is in electrical contact with the contact portion 1bb of the contact projection 23 at the tip of the plurality of negative electrode rods 1b.

  As shown in FIG. 3C, which is a cross-sectional view taken along the line cc of FIG. 3A, the electrode bar contact plate 7 has a hexagonal shape in plan view, and has a plurality of positive electrode bars 1a. Are inserted into the holding holes 25 of one electrode rod contact plate 7 (upper side in the figure) of the pair of electrode rod contact plates 7 and 7, respectively, and contact the electrode rod contact plate 7 at the electrical contact portion 1aa. As shown in FIG. 3E, which is a cross-sectional view taken along the line ee, the plurality of negative electrode rods 1 b are in contact with the other electrode rod contact plate 7 (the lower side in the drawing) at the electrical contact portion 1 bb. .

  The electrode rod holding portion 8 is made of an insulating plate such as an acrylic plate provided between a pair of electrode rod contact plates 7 and 7, and a plurality of electrode rods 1a and 1b are inserted into the insulating plate. Holding holes 26 are provided, and positive and negative electrode rods arranged alternately and spaced apart in a direction (radial direction) orthogonal to the axial direction of the electrode rods 1a and 1b are respectively connected to the holding holes 26 and the diameters. Engage in a non-movable direction and hold while being electrically isolated. 3D is a cross-sectional view taken along the line dd of FIG. 3A, and the electrode bar holding portion 8 has a hexagonal shape in plan view like the electrode bar contact plate 7, and each electrode bar 1a and 1b are held by the electrode rod holding plate 8, respectively.

  As shown in FIG. 3A, for example, the UVW-phase wiring bars 32 to 34 come into contact with the electrode bar contact plates 7 to supply power to the electrode bars. The U-phase wiring bar 32 is connected to the u-phase load electrode bar contact plate 7 at the wiring contact portion 32a (FIG. 3B), and the V-phase wiring bar 33 is connected to the v-phase load electrode rod contact plate at the wiring contact portion 33a. 7, the W-phase wiring bar 34 is in contact with the w-phase load electrode rod contact plate 7 at the wiring contact portion 34 a (FIG. 3B), respectively, and the positive electrode rod 1 a and the negative electrode rod 1 a are contacted. 1b.

  As shown in FIG. 5, the electrode rod assembly 5 of each layer is fixed to a frame 9 made up of a plurality of, for example, six bolt-shaped columns 18 arranged at equal intervals in the circumferential direction, surrounding the entire outer periphery. Thus, a suspension 41 that can be suspended from the electrode bar assembly 5 is fixed to the frame 9. As shown in FIGS. 3C and 3E, the electrode bar contact plate 7 has six engaging holes 27 provided on the peripheral edge thereof passing through the pillars 18 to maintain the horizontal state. As shown in D), the electrode rod holding portion 8 is tightened with nuts or the like at three locations, for example, with the six engagement holes 28 provided in the peripheral portion thereof being passed through the respective struts 18 and held horizontal. It is fixed and fixed to the frame body 9. In this example, a plurality of arm portions 41a of the hanger 41 shown in FIG. 5 are stretched over each column 18 of the frame body 9, and an engagement provided at the tip of the arm portion 41a on the bolt 42 above the column 18 is provided. The hole is fitted and fixed with a nut 43 or the like.

  As a result, the entire plurality of electrode rods 1a, 1b are packaged, and therefore, when cleaning such as removing the scale attached to each electrode rod 1a, 1b, the electrode rod assembly 5 can be lifted and removed from the case 6. Since the entire electrode rods 1a and 1b can be exposed and cleaning such as scale removal is facilitated, maintenance such as cleaning is facilitated.

  As shown in FIG. 1, the electromagnetic water heater 10 is an electrode rod 1 for heating electromagnetic waves, a bottomed stainless steel pipe 3 having a diameter of about 30 mm and a length of about 400 mm, an about 400 g grout material and about 8 g (weight). A ratio of about 2%) is added and the hydrated filler 2 is used. The positive electrode rod 1a has a contact cap 21 made of stainless steel at the front end and an insulating cap 22 attached at the rear end. The negative electrode rod 1b has a contact projection 23 made of stainless steel at the front end and an insulating cap 24 attached to the rear end. As shown in FIG. 2, the electromagnetic water heater 10 is formed by forming three electrode rod assemblies 5 each having a plurality of positive and negative electrode rods 1a and 1b.

  The water supplied from the water supply port 11 in FIG. 2 rises from the bottom to the top while flowing around the electrode rods 1a and 1b of each layer in the three-layer electrode rod assembly 5. During this time, water between the plurality of positive and negative electrode rods 1a, 1b is heated by electromagnetic wave heating. The water in the case 6 is sequentially heated as it flows from the lower electrode rod assembly 5 to the upper electrode rod assembly 5, and can be used as a water heater that heats the flowing water by flowing out warm water from the outlet 12.

  In this way, the commercial AC power is supplied to the electrode rod assembly 5 of each layer having a plurality of positive and negative electrode rods 1a and 1b filled with the filler 2, so that the inside of each electrode rod 1a and 1b. Proper electromagnetic waves that can be heated by electromagnetic waves are generated, and water flowing around each electrode rod is heated. As a result, a heating rate and heating power that are remarkably superior to those of an electric heater of a conventional electric water heater can be obtained, and a high-frequency oscillator and a magnetron are not required, and a small, simple structure and low cost are provided in the case 6. Continuous running water can be heated.

  Further, the temperature of hot water and the flow rate of water can be arbitrarily controlled by adjusting power (for example, supply current) from a commercial three-phase AC power source. Moreover, since the electromagnetic water heater 10 can be reduced in size, the thermal diffusion from the case 6 can also be reduced.

  FIG. 6 shows a plan view of the electromagnetic water heater system arranged in a state where a plurality of electromagnetic water heaters 10 of FIG. 2 are connected. In this example, for example, three electromagnetic water heaters 10 (10A, 10B, 10C) are connected, but two or four or more may be connected. In the control panel C, the control unit 20 and the electromagnetic valve described above are accommodated. In FIG. 6, first, water is supplied from the water supply port 11a of the first electromagnetic water heater 10A and flows out from the outlet 12a, and water is supplied to the water supply port 11b of the second electromagnetic water heater 10B to output the outlet 12b. The water is supplied to the water supply port 11c of the third electromagnetic water heater 10C and the hot water flows out from the outlet 12c.

  FIG. 7 shows a side view of FIG. This electromagnetic water heater system has a water distribution pipe 16, a water stop valve 17 and a joint 19 in addition to the above configuration. The water supplied from the water supply port 11a of the electromagnetic water heater 10A continuously flows through each of the electromagnetic water heaters 10A, 10B, and 10C and is heated sequentially, and then flows out as hot water from the outlet 12c of the electromagnetic water heater 10C. .

  In this way, in this electromagnetic water heater system, since water is sequentially flowed and heated sequentially by each of the electromagnetic water heaters 10A, 10B, and 10C, the continuous flowing water can be heated and more reliably heated to warm water. Continuous hot water supply is possible with a simple structure and low cost.

  In the second and third embodiments, the electrode rod assembly 5 is configured in three layers and a commercial three-phase AC power supply is used. However, the electrode rod assembly 5 is an integral multiple of three layers, 6 You may comprise in a layer, 9 layers, etc. Further, the electrode rod assembly 5 may be configured in one layer, two layers, four layers, five layers, etc. In this case, a commercial single-phase AC power source is mainly used.

  In the above embodiments, the electrode rods 1a and 1b are arranged in the vertical direction and the electrode rod assembly 5 is formed in the vertical direction. However, the electrode rods 1a and 1b are arranged in the horizontal direction and the electrode rod assembly is arranged. The body 5 may be formed in the horizontal direction.

  In addition, as above-mentioned, the electromagnetic water heater concerning this invention supplies hot water to a boiler as a front stage apparatus of a boiler as well as using it as a hot water heater which heats the continuous flowing water by 1 unit | set or several units | sets. Therefore, it can also be used for applications that reduce the low combustion efficiency of the boiler.

(A), (B) is a side view which shows the electrode rod for electromagnetic wave heating which concerns on 1st Embodiment of this invention. It is a side view which shows the electromagnetic water heater which used multiple electrode bars of FIG. 1 which concern on 2nd Embodiment of this invention. (A)-(E) are the block diagrams which show the electromagnetic water heater of FIG. It is an electrical wiring diagram of the electromagnetic water heater of FIG. It is a side view which shows the state which removes an electrode stick assembly from a case. It is a top view which shows the electromagnetic water heater system which is 3rd Embodiment of this invention. It is a side view which shows the electromagnetic water heater system of FIG.

Explanation of symbols

1: Electrode electrode 1a for electromagnetic heating: Positive electrode rod 1b: Negative electrode rod 2: Filler 3: Metal pipe (stainless steel pipe)
5: Electrode bar assembly 7: Electrode bar contact plate 8: Electrode bar holding unit 10, 10A, 10B, 10C: Electromagnetic water heater 11: Water supply port 12: Outlet 20: Control unit 41: Hanging tool C: Control panel

Claims (8)

  Electromagnetic heating, in which a metal pipe is filled with a filler hydrated by adding 1.5% to 2.5% by weight of Fe powder to a cement-based material in which at least an expandable admixture is mixed with a cement material Electrode rod. In claim 1,
The filler includes a grout material as the cement-based material, and a Fe powder having a weight ratio of 1.5% to 2.5% is added to the filler. An electrode rod for heating electromagnetic waves, in which an ethrin guide made of Al ₂ O ₃ .3CaSO ₄ .32H ₂ O is generated. In claim 1 or 2,
Each electrode rod is composed of a plurality of electrode rods each having at least one positive electrode and a negative electrode, and the electrode rods of the positive electrode and the negative electrode are spaced apart from each other in a direction perpendicular to the axial direction. An electrode rod for heating electromagnetic waves, which is capable of heating water or other dielectrics between the electrode rods by generating electromagnetic waves inside the electrode rods by supplying electric power from a commercial AC power source. A plurality of electrode rods according to claim 3 are provided, and an electrode rod assembly in which electric power is supplied to each electrode rod from the commercial AC power source;
A case in which the electrode rod assembly is housed and has a water supply port and an outlet, and water from the water supply port flows around each electrode rod and flows out of the outlet,
A detection unit for detecting at least the temperature and flow rate of water in the case;
A control unit for controlling the temperature and flow rate of the water based on the detection signal,
The electromagnetic water heater which heats the flowing water in a case by the electromagnetic wave heating of the water which flows between the electrode poles of the said positive pole and a negative pole. In claim 4,
The electrode rod assembly has a pair of electrode rod contact plates disposed opposite to each other in the axial direction of each electrode rod, and an electrode rod holding portion for holding each electrode rod,
The pair of electrode rod contact plates are electrically connected to one electrode rod contact plate with one end of a plurality of positive electrode rods and one end of a plurality of negative electrode rods to the other electrode rod contact plate. In electrical contact,
The electrode rod holder is an electromagnetic water heater that holds a plurality of positive and negative electrode rods arranged alternately and spaced apart in a direction orthogonal to the axial direction of the electrode rod while being electrically insulated. . In claim 5,
An electromagnetic water heater, wherein the electrode rod assembly is provided in a plurality of layers in the case.   The electromagnetic hot water according to claim 5 or 6, wherein the electrode rod assembly is fixed to a frame that supports the electrode rod assembly, and a hanging tool capable of suspending the electrode rod assembly is fixed to the frame. vessel. A plurality of electromagnetic water heaters according to any one of claims 4 to 7 are connected,
An electromagnetic water heater system that can supply hot water continuously by flowing water sequentially through each electromagnetic water heater and heating it sequentially.

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