CN200979277Y

CN200979277Y - Electromagnetic type water heater

Info

Publication number: CN200979277Y
Application number: CN 200620135923
Authority: CN
Inventors: 严运进
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-10-11
Filing date: 2006-10-11
Publication date: 2007-11-21
Anticipated expiration: 2016-10-11

Abstract

The utility model relates to an electromagnetic heater which transforms the electric energy into heat energy using the electromagnetic induction principle. The present electric-heating pipe heater of water storage type has big bulk and heat emission area thereby the energy loss is inevitable. The instance electric-heating pipe heater has a small application scope, when the difference in temperature is large, the work current is large, which is easy to cause accident. The electromagnetic heater comprises a liquid container, a control circuit, an induction coil and an electric power, wherein the liquid container is a cylindrical metal pipe of perpendicular arrangement, an lower end surface of the metal pipe is connected with a water inlet pipe, an upper end of the metal pipe is connected with a warm water collector of funnel-type, an upper end of the collector is connected with an outlet pipe which the outside wall is provided with a temperature sensor, the surface of the cylindrical metal pipe is provided with insulation material which is provided with electromagnetic excitation coil. Compared with the present technology, the utility model has the advantages of high heat efficiency, convenient for controlling, and safe for using.

Description

The electromagnetic type hot-water heater

Technical field

The utility model relates to a kind of electromagnetic type hot-water heater that utilizes electromagnetic induction principle to convert electrical energy into heat energy.

Background technology

At present, known electric heater all is to utilize the heating of metal heating mode of heating; This mode is that heating is placed in the metal tube, and fill insulant between heating and inner wall of metal tube makes it to become a heater.The heating tube heater places water usually, directly with water heating, therefore can only prevent and can not fundamentally solve the electric leakage problem.Storage water heater electrothermal tube heating water heater volume is big simultaneously, and area of dissipation is also big, also because of needing insulation usually, certainly leads to energy loss; The existing common scope of application of instant electric pipe heating water heater is little, and when the temperature difference was big, operating current was also big, caused security incident easily.

Summary of the invention

The utility model overcomes the problem that prior art exists, and provides a kind of safe in utilization, the electromagnetic type hot-water heater that the thermal efficiency is high.

For overcoming the problem that prior art exists, the technical solution of the utility model is:

The electromagnetic type hot-water heater, comprise liquid container, control circuit, induction coil and power supply, its special character is: described liquid container is a vertically disposed cylindrical metal water pipe 2, and the bottom surface, lower end of metallic water pipe 2 connects water inlet pipe 3, and the upper end of metallic water pipe 2 connects infundibulate hot water gatherer 4, the upper end of gatherer 4 connects outlet pipe 1, and the outer wall of outlet pipe 1 is provided with temperature sensor 7; Insulating materials 8 is set on the face of cylinder of cylindrical metal water pipe 2, electromagnetic excitation induction coil 6 is set on the insulating materials 8.

The bottom surface, lower end of above-mentioned metallic water pipe 2 connects water inlet pipe 3, and water inlet buffer 5 is set in the water inlet.

Above-mentioned water inlet buffer 5 is a circular metal flat board, and it is arranged on the water inlet, bottom surface by highly consistent equally distributed pillar.

On the circular metal flat board of above-mentioned water inlet buffer 5 aperture is set.

The high frequency pulse power supply that above-mentioned electromagnetic excitation induction coil 6 connects.

Above-mentioned temperature sensor 7 is through divider resistance, the output temperature sensing voltage, and this voltage signal is admitted to power control circuit, regulates heating power and makes leaving water temperature keep constant.

The utility model is with respect to prior art, and its advantage is as follows:

1, the utility model uses the electromagnetic type heating, and heating current is positioned at outside the cylindrical metal water pipe, thereby safe in utilization.

When 2, the magnetic line of force in the utility model magnetic field is by near the metallic water pipe the coil, can produce countless little eddy current, water pipe itself is generated heat voluntarily, thereby the water in the heating pipe, because of adopting same water body is repeatedly repeated the method that heats, reach and change identical and the reduction operating current, so the thermal efficiency is higher in certain period self-energy.

3, the utility model adopts temperature-control circuit, oscillating circuit, and the IGBT exciting circuit, the pulsewidth circuit for regulating and controlling, synchronous circuit, the VAC testing circuit, the VCE testing circuit, circuit such as zero passage detection, thereby control is convenient, safe in utilization.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is a structure cutaway view of the present utility model;

Fig. 3 is the utility model circuit diagram;

Fig. 4 is the utility model temperature-control circuit figure.

The specific embodiment

To explain the utility model by embodiment below.

Referring to Fig. 1, Fig. 2, structure of the present utility model comprises liquid container, control circuit, induction coil and power supply etc., described liquid container are a vertically disposed cylindrical metal water pipe 2, and the bottom surface, lower end of metallic water pipe 2 connects water inlet pipe 3, water inlet buffer 5 is set in the water inlet, water inlet buffer 5 is a metal plate, and it is arranged on the water inlet, bottom surface by four highly consistent equally distributed pillars, makes cold water slowly enter heating; The upper end of metallic water pipe 2 connects infundibulate hot water gatherer 4, and the upper end of gatherer 4 connects outlet pipe 1, and the outer wall of outlet pipe 1 is provided with temperature sensor 7 (TR1); Insulating materials 8 is set on the face of cylinder of cylindrical metal water pipe 2, electromagnetic excitation induction coil 6 (L2) is set on the insulating materials 8, the electric current that changes when high frequency flows through the magnetic field that electromagnetic excitation induction coil 6 can produce the high speed variation, when the magnetic line of force in the magnetic field during by near the metallic water pipe the coil, can produce countless little eddy current, water pipe itself is generated heat voluntarily, thereby the water in the heating pipe reach the purpose of hot water.

During work, closed power switch, open water valve, cold water flows to the mouth of a river and enters heating of metal water pipe 2, because stopping of buffer 5, cold water can not directly flow out from delivery port because of the reason of hydraulic pressure, but around buffer 5, in water pipe, spread, and boost with the variation of hydraulic pressure, because of the capacity of heating of metal water pipe greater than the per second water outlet water yield, the heated water yield of per second is greater than the per second water outlet water yield, so always some water (heating of metal water pipe volume subtracts the per second water flow) is repeated heating; Through heating, the water that temperature is higher, proportion is less, and upwards concentrates, and the water proportion that temperature is lower is bigger, concentrates downwards, flows out through delivery port through heating when temperature is the highest repeatedly.

Suppose that the utility model per minute discharge is 5 liters, water temperature is improved 40 ℃; Suppose that energy conversion rate is 100%, at this moment, institute's energy requirement is Q=cm Δ t=4.2 * 1000 * 5 * 40=8.4 * 100000J.Electrical power P=8.4 * 100000J ÷ 60S=14KW.We are with 5L/60 ≈ 83.3cm now ³The water of (per second discharge) heats n second continuously, and when water temperature was improved same temperature (Δ t=40 ℃), required electrical power was if that original 1/n. is n=10, then P=1.4kw.At this moment, the volume of heating of metal water pipe is not less than 10 * 83.3cm ³

Referring to Fig. 3, Fig. 4, the utility model be in electromagnetism hot water apparatus inside, by rectification circuit the alternating voltage of 50Hz become DC voltage, convert DC voltage to high-frequency pulse voltage through control circuit again, the electric current that high frequency changes flows through coil can produce the magnetic field that changes at a high speed.

In temperature-control circuit, temperature sensor TR1 is through divider resistance, the output temperature sensing voltage, and this voltage signal is admitted to power control circuit, regulates heating power and makes leaving water temperature keep constant.

Physical circuit is described as follows

IC1 IC2 is the LM339 operational amplifier.Built-in four voltage comparators that turnover voltage is 6mV of LM339 when voltage comparator input terminal voltage forward (+input terminal voltage is higher than-goes into defeated terminal voltage), place the triode of LM339 internal control output to end, and this moment, output was equivalent to open circuit; When the voltage comparator input terminal voltage is reverse (input terminal voltage is higher than+input terminal voltage), the triode conducting that places LM339 internal control output drags down the outside voltage that inserts output of comparator, and this moment, output was 0V.When output passed through IC internal discharge pipe ground connection, we were defined as IC OFF, otherwise ON.

Oscillating circuit: IC1C, D3, D4, D5, D6, R10, R11, R12, C6 form oscillating circuit.As IC1C OFF, when input has the positive voltage input in the same way, input terminal voltage equals the forward pressure drop of D5, D6 in the same way, IC is ON by the OFF transition when input terminal voltage is greater than reverse input end voltage in the same way, IC internal discharge tube open circuit at this moment, and the 5V power supply charges to C6 by R12, R11.When C6 makes the reverse input voltage of IC1C greater than input terminal voltage in the same way through overcharging, IC1C is OFF by the ON transition, at this moment IC1C in the same way input terminal voltage equal D5, D6 pressure drop in the same way, reverse input end voltage reduces through R11, D4, ICIC internal discharge tube discharge because of C6, when reverse input end voltage during, repeat said process and form vibration less than input terminal voltage in the same way.IC1C input terminal voltage in the same way is high more, and the time that is in the ON state is long more, and heating power is big more, otherwise more little.

The IGBT exciting circuit: when IC1C ON, Q1 conducting Q2 ends, and 18V voltage produces the G utmost point that about 17.6V voltage is added to IGBT1, IGBT1 conducting by R17, R18 dividing potential drop again through the C utmost point, the E utmost point of Q1; When IC1C OFF, Q1 ends, Q2 conducting discharge, and IGBT1 ends.

Pulsewidth circuit for regulating and controlling: Q1, Q2, Q3, R21, R22, R23, R24, R25, R26, R27 form the pulsewidth circuit for regulating and controlling, and the Q3C pole tension is high more, and it is long more that IC1C is in time of ON, and the water heater heating power is big more.

Synchronous circuit: in a certain moment of a high frequency electric in the cycle, in the conversion process of energy between L2 and C3, if the node voltage of L2 and IGBT1C interpolar is higher than the node voltage between L2 and L1, then IC1D OFF, IC1C OFF oscillating circuit output voltage is 0V, and IGBT1 ends.If L2 and IGBT1C interpolar node voltage are less than L2 and L1 intermediate node voltage, then IC1D ON oscillating circuit operate as normal.Above process has guaranteed to be added to switching pulse forward position and the last VCE pulse back edge synchronised that produces of IGBT1 that IGBT1 G extremely goes up.

VAC testing circuit: AC220V divides two-way to detect through the B1 rectifier rectification: a route R23 R24 and R25 dividing potential drop produce a DC voltage, and this voltage is added to the Q2 B utmost point.The variation of AC220V will cause the variation of Q2 B pole tension, and when Q2 B pole tension rose, Q2 C pole tension descended, and Q3 B pole tension descends, Q3 C pole tension descends, and IC1C is in the ON time and shortens the shortening of IGBT1 ON time, otherwise when Q2 B pole tension descended, the IGBT1 ON time prolonged.One tunnel DC voltage that produces after R34 R32 and R33 dividing potential drop is compared through the 10V reference voltage of R35 ZD4 output in IC2B, when AC220V supply voltage during greater than 298V, IC2B inverting input voltage is greater than in-phase input end voltage, IC2B OFF, D7 D8 conducting, Q1 ends, and IGBT1 ends.

The VCE testing circuit: the pulse voltage that IGBT1 C is extremely gone up is divided by R2 R3 R5 and R6 and is sent to the IC1B inverting input and compares with the reference voltage of IC1B in-phase input end.IC1B OFF when IGBT C pole tension is higher than 1028V, IC1C OFF, IGBT1 ends.Guarantee that IGBT1 works below withstand voltage (1200V).

Zero passage detection: when the AC220V AC supply voltage is in lower half, the pulsed dc voltage that the bridge rectifier that D12 D13 D14 D15 forms produces is by R38 R41 dividing potential drop, keep the Q5 conducting, the IC1A inverting input is by Q5 ground connection, IC1A in-phase input end voltage is greater than inverting input voltage, IC1A ON.When the AC200V supply voltage was in zero crossing, Q5 ended because of base voltage is lower than starting resistor, and at this moment IC1A in-phase input end voltage is less than inverting input voltage, IC1A OFF, and IC1C OFF, IGBT1 ends.

Referring to Fig. 4, in temperature-control circuit, temperature sensor TR1 is through divider resistance, the output temperature sensing voltage, and this voltage signal is admitted to power control circuit, regulates heating power and makes leaving water temperature keep constant.Temperature-control circuit: 5V voltage is delivered to IC2C, IC2D in-phase input end through the DC voltage of R28, PR1 and the generation of R29 dividing potential drop as reference voltage; TR1, TR2 are negative tempperature coefficient thermistors, and resistance is 100K in the time of 25 ℃.5V voltage is through TR1 and R30 dividing potential drop, and the variation of this voltage has reflected the variation of RT1 resistance, and the variation of RT1 resistance has reflected the variation of water outlet water temperature.This voltage divides two-way output: the one tunnel delivers to the IC2C inverting input compares with the reference voltage of in-phase input end, when inverting input voltage greater than by the phase input voltage time, IC2C OFF, IC1C OFF, IGBT1 ends, water heater stops to heat; Otherwise, IC2C ON.Regulate variable resistor PR1 and can change reference voltage, change reference voltage and also just changed the highest water outlet water temperature.Another road is through R26 and the R27 dividing potential drop base voltage as Q1, and when water outlet water temperature during near set water temperature, Q1 conducting, the Q3 emitter voltage descends, and heating power reduces.Be close to IGBT radiator mounting temperature sensor TR2,5V voltage is delivered to the IC2D inverting input after TR2 and R31 dividing potential drop.When the IGBT radiator temperature is higher than setting value, IC2D OFF, IC1C OFF, IGBT1 ends.ZD1 is in parallel with R29, when the R28 short circuit, and R28+PR1≤20K, the ZD1 conducting, reference voltage is 0, IC2C, IC2D OFF, IGBT1 ends.ZD2 is in parallel with TR1, when TR1 opens a way, and the ZD2 conducting, IC2C OFF, IGBT1 ends.ZD3 is in parallel with TR2, when TR2 opens a way, and the ZD3 conducting, IC2D OFF, IGBT1 ends.

Claims

1, electromagnetic type hot-water heater, comprise liquid container, control circuit, induction coil and power supply, it is characterized in that: described liquid container is a vertically disposed cylindrical metal water pipe (2), and the bottom surface, lower end of metallic water pipe (2) connects water inlet pipe (3), and the upper end of metallic water pipe (2) connects infundibulate hot water gatherer (4), the upper end of gatherer (4) connects outlet pipe (1), and the outer wall of outlet pipe (1) is provided with temperature sensor (7); Insulating materials (8) is set on the face of cylinder of cylindrical metal water pipe (2), electromagnetic excitation induction coil (6) is set on the insulating materials (8).

2, electromagnetic type hot-water heater according to claim 1 is characterized in that: the bottom surface, lower end of described metallic water pipe (2) connects water inlet pipe (3), and water inlet buffer (5) is set in the water inlet.

3, electromagnetic type hot-water heater according to claim 1 and 2, it is characterized in that: the water inlet, bottom surface of described liquid container is provided with water inlet buffer (5), water inlet buffer (5) is a circular metal flat board, and it is arranged on water inlet upper end, bottom surface by highly consistent equally distributed pillar.

4, electromagnetic type hot-water heater according to claim 3 is characterized in that: on the circular metal flat board of described water inlet buffer (5) aperture is set.

5, electromagnetic type hot-water heater according to claim 4 is characterized in that: the high frequency pulse power supply that described electromagnetic excitation induction coil (6) connects.

6, electromagnetic type hot-water heater according to claim 5, it is characterized in that: described temperature sensor (7) is through divider resistance, the output temperature sensing voltage, this voltage signal is admitted to power control circuit, regulates heating power and makes leaving water temperature keep constant.