CN101275780A - Tubular high-frequency electromagnetic induction heating type water heater - Google Patents

Abstract

Tubular high frequency electromagnetic induction heating water heater forms a heating cavity in the heater through a frequency magnetic field; the eddy current heat is taken away when the inlet water flows without heat-transfer process. Therefore, the water is rapidly heated with less residual heat loss, less power, less power consumption. A running water switch control power supply is arranged in the water heater. Therefore, there is hot water available when opening the tap. The water begins with extremely cold water and the tap is closed to cut off the power supply. The water and the electricity has no relevance with absolutely using safety, which is practical to wash hands, faces, teeth and make tea or instant food in cold weather. The invention is small in volume and light in weight, which can be mounted below a washbasin or a sink. The less close to the tap, the less cold water wasted.

Description

Tubular high-frequency electromagnetic induction heating type water heater

Tubular high-frequency electromagnetic induction heating type water heater is that the transformation of the way is and next on the basis of No. 2006100712868 applications for a patent for invention, and it is easy to use that purpose is, makes the water immersion heater, the cold water less wastage, and waste heat is few, little power consumption.Be mainly used in that cold day is washed one's hands, washed one's face, Xian's pin, wash dish, wash rice, cook, wash the dishes, and make tea at ordinary times and just food etc. of foam method.Belong to the electric heater product in the modern household electric equipment products.

Tubular high-frequency electromagnetic induction heating type water heater is compared with the electric heater of miniature resistance heating formula with coal gas type water heater in the market, certain advantage is all arranged, because it is all far away from the water place that above-mentioned water heater is installed the place, therefore, pipeline is also longer, remaining water is also more in the pipe, each flow out hot water before, must emit and remained in last time in the pipe behind the chilled water, just have the hot water outflow, after using hot water, unnecessary hot water is stayed again in the pipe, and the time is long slightly, has become cold water again, must emit again during reusable heat water, therefore, both wasted water, wasted heat energy again, very uneconomical, to country, to family all is very big waste.So, the tubular tap water heater that existing in the market a kind of many resistance wire heat-generating pipes combine, still, the resistance wire heat-generating pipe has a diabatic process, heats slower.In order to improve firing rate, must add high-power use, generally all more than 4000W.Power is big more, and supply line is also big more, and general household electricity circuit is everlasting about 3000W, and is very difficult if long-term excess load is used, and power is big more, and the waste heat waste is many more.Weak point at various water heaters on the above-mentioned market exist adopts the high-frequency electromagnetic induction mode of heating, and induction coil is designed the certain spacing of being separated by outside tubular or oval iron pipe, makes the out-of-date heating of current.Owing to adopt tubular structure, can try one's best during installation near tap, the feasible tap of fetching boiling water just has hot water to flow out, and power and water avoids waste.

Tubular high-frequency electromagnetic induction heating type water heater is to be polarized to spiral type magnetic field repeatedly and to be converted into the vortex flow heating in high frequency magnetic field according to ferrimagnet.So-called high frequency, be to have different performance characteristics and purposes to divide in the different frequency scope according to electromagnetic wave, different partitionings is arranged again in different technical fields, in heating technique, be divided into power frequency, intermediate frequency, high frequency, microwave, infrared ray etc., high frequency refers generally to the electromagnetic wave of 10KHZ-300KHZ, and high frequency mainly is to utilize induction to produce vortex flow heat.But because increase frequency, Kelvin effect strengthens, and vortex flow reduces, and power descends, and therefore, it is best generally to be selected in 20KHZ.In order preferably to utilize vortex flow heat energy heating water temperature, should select for use ferromagnetic metal tube to do the vortex flow heat-generating pipe, and will prevent to get rusty, preferably select iron-nickel alloy pipe for use, because iron nickel all is the metal that absorbs the magnetic line of force, also non-corrosive behind the alloy.For current are taken away heat through the heat-generating pipe surface, load coil should be installed in the heat-generating pipe or pipe outer can, still, load coil must be from the certain distance in heat-generating pipe surface, water is heated from wherein flowing through.Load coil no matter is mounted in the pipe or outside the pipe, vortex flow heat all is to be created in the heat-generating pipe surface, directly contacts with flowing water, do not have diabatic process,, have water to flow and just switch on as long as fetch boiling water tap, energising just has hot water to flow out, and tap closes to cut off the water supply and promptly closes electricity, and waste heat is few in the water pipe.Therefore, immersion heater, little power consumption, the waste heat less wastage lacks power consumption 1/3 than the resistance heating formula.This programme has five big characteristics: first characteristics, because electromagnetic induction heating all has certain resonance impedance heating, power is big more, and heat production is many more, also is waste if be not used.For this reason, load coil (1) should be contained in one neither influences magnetic flux, impermeable again hollow seal cylinder (9) lining, and the cooling fluid (11) of good insulating can be adorned in tube (9) lining, as transformer oil, silicone oil etc.The hollow cylinder (9) of sealing should be selected the good material of heat resistance for use, as the fluorine silastomer etc.Second characteristic, a tube ferrite bead of (9) overcoat (7), the electromagnetic wave that forces load coil (1) to produce is inwardly assembled, in order to avoid outwards scattering.The 3rd characteristics, for leakage field does not take place with the external world in the magnetic flux that makes heating iron pipe (2), make fixed disc (13) and (19) that are threaded with non-magnetic conductive metal (as aluminium or copper) at heating iron pipe (2) two ends, the iron pipe (2) that will generate heat squeezes to be given as security in the hollow cylinder that load coil (1) is housed (9), makes heating iron pipe (2) and load coil (1) remain certain fixed intervals (12).The 4th characteristics as long as keep under the constant condition in interval, can be designed to oval-shaped long tube with heat-generating pipe (2) and coil (1), and the thickness of product is reduced, and make commodity elegant in appearance.The 5th characteristics, for simple operations, tap is opened just has hot water to flow out, and has designed piston (16) switch of a supporting flowing water impulsion especially.On Fig. 1, Fig. 2, Fig. 3, can find out, as long as tap is opened, when water outwards flows out, the heater internal pressure reduces, pressure disequilibrium between A and the B, at this moment, A portion intake pressure is greater than the hydrostatic pressure of B portion and the elastic force of spring (22), the piston of water blockoff (16) by intake pressure push open, the permanent magnet (26) of piston (16) lower end moves to the position of dry-reed tube switch (25), dry-reed tube switch (25) is connected, VS opens with bidirectional triode thyristor, connects alternating current circuit, produces rectification and exports and open switching tube (4) and heat.When tap closes after death, the heater internal pressure increases, when the intake pressure of the pressure of B portion and A portion equated, the pressure differential between A, B equaled 0, at this moment, the elastic force of spring (22) plays a role, sealing ring (23) on the piston (16) headed in the water inlet pipe water is turn-offed, simultaneously, permanent magnet (26) leaves the position of tongue tube (25), tongue tube (25) contact disconnects, and bidirectional triode thyristor VS turn-offs.The characteristics of this switch are to be magnetic UNICOM between permanent magnet (26) and the tongue tube (25), and water-tight, electricity links anything but with water, ensure to use to be perfectly safe.

Tubular high-frequency electromagnetic induction heating type water heater is made up of with water-electricity linkage switch three parts electronic component (comprise and detect monitoring, drive circuit) and heater (this programme), its structure is by shown in the figure: Fig. 1 is a schematic diagram, 1 is electromagnetic induction heating coil (being called for short heater coil or coil) among the figure, 2 is heat-generating pipe, also be heating tube or iron pipe, iron core), 3 is resonant capacitor, 4 is the oscillation switch pipe, 5 for volume system exchanges induction reactance coil (abbreviation choke coil), and 6 is Lu ripple capacitor; Fig. 2 is the heater sectional view, 7 is ferrite bead among the figure, 8 is heater housing (abbreviation shell), 9 are coil box (also claim oil box, be called for short box), and 10 is backstay, is to guarantee that coil (1) maintains static in oil box (9), distance between hold-in winding (1) and iron core (2) is constant, 11 is heat transfer agent (also being cooling fluid), and 12 is heating chamber, is the zone that water flows through; Fig. 3 is the heater profile, is the application's Figure of abstract, and 13 is the water inlet end fixed disc among the figure, and 14 is piston seat, and 15 is the current through hole, and 16 is piston (also being the flowing water switch), and 17 is intake end cover, and 18 are the water outlet end cap.19 is the water side fixed disc, and 20 and 21 is silicone gasket.22 is piston spring, and 23 is the piston cushion rubber, and 24 is the piston water inlet, and 25 is tongue tube, and 26 is permanent magnet; Fig. 4 is water-electricity linkage switch and electronic component installation site figure, 27 are electronic component (comprising detection, monitoring, driving element) among the figure, 28 is the electronic component plate, 29 is rectistack, 30 is fixed screw, and 31 is clamping plate, and 32 is insulating trip (mica sheet or polyester sheet), 33 is switching tube, and arrow refers to water (flow) direction among the figure; Fig. 5 is the control schematic diagram of water-electricity linkage switch, and middle Figure 25 is dried spring bomb tube, and all the other use letter representation, and Z is rectifier (also being rectistack), and VS is a bidirectional triode thyristor, and R is a resistance, and VD is light emitting diode (expression has), and RB is a protective tube.

Tubular high-frequency electromagnetic induction heating type water heater, mainly determine its resonant frequency by induction coil (1) and resonant capacitor (3) parameter, in electromagnetic oven, the size of capacitor (3) is fixed, resonant frequency range is fixed, key is that the parameter of coil (1) is variable, according to theoretical formula: $f=\frac{1}{2\mathrm{\π}\sqrt{\mathrm{LC}}},$ Push away by formula is counter $L=\frac{1}{{4\mathrm{\π}}^2{f}^{2}c}.$ But, inductance L again with the distance dependent of iron core (2), square being inversely proportional to of inductance value and distance, therefore, coil (1) need be debugged decision with the distance (12) of iron core (2) in the production trial-manufacturing process, the method for debugging is the diameter and the resonance power of prerequisite distance (12) and iron core (2), as long as power has determined, the loop total current has just determined, adopts the instrument of ammeter as debugging coil (1) parameter.But ammeter must be connected on the output of rectifier Z, can not be connected in series with coil (1), because the resonance current on the coil (1) is O, surveys to come out.The making of coil (1), generally all be parallel close around.After these condition of resonances all determined, the size of inductance value just was decided by the length of coil (1) with line, the just number of turns of coil (1).This need be by repeatedly debugging decision, and this is the key of making, and remaining detection, monitoring, driving element all have provision in set on market, and oneself can not produced.The oil box (9) of dress cooling fluid (11) can be entrusted the working of plastics process plants.Red circle (1) is tied up on backstay (10) in oil box (9), and it is stiff that coil (1) is fixed in the oil box (9), is the key that ensures heater performance.Ferrite bead (7) can be made cylindrical shape, in order to be adjacent to oil box (9), can to make four and break off with the fingers and thumb and close up, and can get in touch with relevant producer.The fixed disc (13) at iron core (2) two ends and (19) can make of the non-magnet material of copper or aluminium, in order to avoid magnetic flux is guided shell into.Piston (16) and intake end cover (17) are non-magnet material, and available copper, aluminium alloy or stainless steel material are done.Piston seat (14) and water outlet end cap (18) can be processed on lathe with iron pipe with shell (8), also available stainless steel material processing.Iron core (2) must pure iron or iron nickel cooperation material do, two ends seal.Permanent magnet (26) and tongue tube (25) have the auxiliary products supply.

Claims (6)

1. tubular high-frequency electromagnetic induction heating type water heater, mainly constitute heating chamber (12) by coil (1) and iron pipe (2), being contained in the shell (8) by fixed disc (13) and (19) becomes induction heater, it is characterized in that coil (1) is contained in the coil box (9) of cooling fluid (11), maintain static by backstay (10), box (9) is outer to have ferrite bead (7) to prevent the outside scattering of the magnetic line of force, and the controlled brick VS of piston (16) drive tongue tube (25) switch two-way of water impulsion is housed at water inlet end.

2. according to the described tubular high-frequency electromagnetic induction heating type water heater of claim 1, it is characterized in that induction heater shell (8) two ends tighten into water heater integral body with piston seat (14) with water outlet end cap (18) by connecting thread.

3. according to the described tubular high-frequency electromagnetic induction heating type water heater of claim 1, it is characterized in that iron pipe (2) two ends are tightened by screw thread and water inlet end fixed disc (13) and water side fixed disc (19) to push down silicone gasket (20) and (21) become heating core.

4. according to the described tubular high-frequency electromagnetic induction heating type water heater of claim 1, it is characterized in that being equipped with on the piston seat (14) the corresponding water-electricity linkage switch that becomes of permanent magnet (26) of spring (22) and piston (16) lower end with tongue tube (25).

5. according to the described tubular high-frequency electromagnetic induction heating type water heater of claim 1, it is characterized in that rectifier bridge heap Z (29) and switching tube (4) are fixed on the piston seat (14) with screw (30) by insulating trip (32) and clamping plate (31), utilize the water inlet heat radiation.

6. according to the described tubular high-frequency electromagnetic induction heating type water heater of claim 1.It is characterized in that profile is round tube or oval tubular body.

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