CN2386368Y - Electric water heater - Google Patents

Abstract

The utility model relates to an electric water heater, which comprises a casing, a water inlet pipe, a water outlet pipe, a control mechanism, an electronic heating converter, etc. The utility model is characterized in that the inner side of the casing is provided with an iron core; a main magnetic circuit of the iron core is sheathed with a framework; the framework is wound with a coil and a metal water flowing pipe; both ends of the metal water flowing pipe is connected with fixed short circuit metal conductors. The electric water heater makes use of the metal water flowing pipe as an induction coil which can obtain a safe super-low voltage, and simultaneously the metal water flowing pipe is a short circuit current generator which can make the metal water flowing pipe rise in temperature quickly in a short time and water flowing into the water pipes absorb heat directly.

Description

A kind of electric heater

The utility model belongs to a kind of device that adds hot water, particularly about the electric heater in the line-frequency induction technical field of heating.

The water heater of domestic and international market sale at present has gas water heater and electrothermal water heater, the gas water heater improper use, and easily contaminated environment is poisoned the people and is jeopardized personal safety.At patent No. 95226661.X Granted publication CN2237199Y, a kind of hollow annular iron core connection running water pipe that has is disclosed on the 1O month 9 1996 Granted publication days, close on the iron core around lead, a logical alternating current, the electromagnetic field of alternation induce the electric heater that eddy current makes the iron core heating that water is heated in iron core.It is owing to water, electricity are isolated safe in utilization, but because this patent utilization eddy current heats, its thermal efficiency and power factor are lower, this is because the internal resistance of eddy current body is too small, leakage reactance becomes big relatively and causes power factor to descend, and because primary winding is around the iron core outside, the heat that the coil copper loss produced fails to utilize consequently to the air diffusion, and the thermal efficiency is low, the annular iron core-closed outer bag coiling by hand of reaching the standard grade of this patent, production efficiency is low, and the eddy current heater iron core of this patent adopts iron and steel casting easily to get rusty, and can cause endless tube wall scale, more reduces the thermal efficiency.

The purpose of this utility model provides a kind of electric heater, to improve electric conversion efficiency, makes the water Fast Heating, uses electric heater water essential safety reliable, improves electric heater production efficiency.

The technical solution of the utility model is: it comprises a kind of electric heaters of composition such as shell, water inlet pipe, outlet pipe, controlling organization, electrothermal transducer, it is characterized in that: iron core is housed in the shell, be with skeleton on the main magnetic circuit of iron core, be wound with coil and metal flow water pipe on the skeleton; Metal flow water pipe two ends are connected and fixed the short circuit metallic conductor.

Described electric heater, its feature also is: between described coil and the metal flow water pipe insulating barrier and ground shield are arranged.

Described electric heater, its feature also is: described metal flow water pipe can be around the inner surface or the outer surface of coil, also can be around the centre of coil.

Described electric heater, its feature also is: described iron core can be silicon steel sheet or glass film alloy sheet, is fixed as " day " word shape or " mouth " word shape by the 3-20cm sectional area.

Described electric heater, its feature also is: described coil can adopt the insulated wire line directly to be φ 1-φ 4mm coiling; It has a public zero curve tap and 3-5 the tap that power switched is used.

Described electric heater, its feature also is: caliber is selected in φ 3-φ 8mm or φ 3-φ 6.5mm in the described metal flow water pipe, and optimal selection is between φ 4-φ 5mm; Wall thickness is selected in 0.3-2mm or 0.3-1.5mm, optimal selection between 0.5-0.75mm, the spiral ring set of described metal flow water pipe coiled, its number of turn is selected in 5-25 circle or 8-15 circle, between the optimal selection 10-12 circle; Its resistance value of the metallic conductor of described metal flow water pipe shorted on both ends≤10-4 Ω, the metal material of metal flow water pipe can be selected red copper or copper alloy or stainless steel material for use, also can be aluminium or alloy material.

Above-mentioned described iron core can be the ring-type iron core that noncrystalline titanium magnetic material is made.

Described metal flow water pipe is the drinking water overflow pipe, is connected with the boiling water buffer in the water side; Be connected with the cool water quantity control valve at water inlet end.

Characteristics of the present utility model are as follows:

1, the utility model utilizes metal flow water pipe and short circuit metallic conductor to do to have three kinds of function interchangers cleverly, be itself to be that the secondary induction coil is again low pressure Short-Circuit High Current generator or hot-water line, its efficient height, power factor is greater than 〉=0.94, owing to adopt special " day " font iron core, and iron core magnetic resistance is little, adopts the internal resistance that reduces leakage reactance winding and metal spiral ring set relatively large, so its power factor is higher in addition.The thermal efficiency 〉=90%, this is owing to the outside of three function interchangers around coil, the heat that the coil copper loss produced is absorbed by three function interchangers and the conduction feedwater, turns bane into boon, and further improves the thermal efficiency of device.

2, the iron core of the utility model design and coil adopt standard component, and production cost is low, the production efficiency height.

3, metal flow water pipe of the present utility model adopts the material that red copper or difficulties such as copper alloy, stainless steel, aluminium or metal are got rusty, and can avoid scale.

What 4, respond on the metal flow water pipe of the present utility model is special lower security voltage, and the closed path loop of the short circuit metal conductor at metal flow water pipe two ends formation, so leakage current table survey reading is zero in the water, so the water essential safety is reliable.

Below in conjunction with the embodiment accompanying drawing the utility model is described further.

Accompanying drawing 1 is the structural representation of embodiment electric shower-bath.

Accompanying drawing 2 is an embodiment iron-core coil circuit diagram.

Accompanying drawing 3 is an embodiment drinking water water heater structural representation.

Among the figure: 1, iron core; 2, power line; 3, coil; 4, metal flow water pipe; 5, switch; Case; 11, skeleton; 12, cool water quantity control valve; 13, the temporary storage of boiling water; 14, tap.

As shown in the figure, iron core 1 usefulness silicon steel sheet is riveted into the E spare and the I spare in required cross section respectively, becomes " day " font iron core through mechanical connection; Be with outer surface and be wound with the coil 3 of setting the number of turn with high strength enamelled wire on the main magnetic circuit of this iron core, it is similar to primary " coil "; This coil inner surface is with selected metal flow water pipe 4 coileds: the spiral ring set, form three function interchangers 4, and it is similar to transformer secondary output " coil ".Spiral ring set two ends weld by flat metallic plate 6 short circuits of design section, and coil is selected line footpath φ 2mm for use, and it has a public zero curve, and extract 3 switching taps 14 out, and its power switched is 2KW, 2.5KW, 3KW.It is that φ 5mm, wall thickness are the spiral ring set of the copper tube coiled of 0.75mm that the metal flow water pipe is selected bore for use.The import of this metal flow water pipe 4 and running water UNICOM, another delivery port and shower nozzle tube connector join.Regulate the switch 5 of power and the green indicating lamp 8 of water-electricity linkage device 7 expression power connections through mixing basic, normal, high temperature; Expression metal flow water pipe 4 has been full of water, can connect the red led 9 that power supply send electricity by power line 2 at any time; Plastic box 10, skeleton 11 are formed complete machine, and Fig. 3 electric drinking water heater water inlet end connects cold water control valve 12, and the water side is connected with the temporary storage 13 of boiling water and constitutes the temporary storage function of boiling water: for the impulse force or the vapour of extenuating the boiling water outlet sprays.

Unimpeded in the water route, when circuit is errorless, the water heater line 2 of connecting with the mains, green indicating lamp 8 is bright immediately; Need only turn on running water switch this moment, and water-electricity linkage device 7 is connected water, electric system delicately; 9 of its red leds are bright, press temperature, power regulating switch 5 arbitrary shelves this moment, and coil 3 is connected the power supply of power demand at once.Because of coil 3 numbers of turn widely greater than the number of turn of " interchanger " 4, be coupled via iron core, make its induced inside go out a SELV that is significantly less than 24V, more become the short circuit system of a closure by short circuit because of its two ends, cause a very big SELV short circuit current of value thus and realize safe and reliable " electrothermal equivalent conversion ", through 3-5 second just the quantitative cold water of input, safe and efficient, be heated to give and decide water temperature efficiently, export required hot water or boiling water continuously from the other end.

The important technology standard of national standard: QB1239-91 and international standard: IEC335-1, wherein the delivery port lowest temperature rise is above standard and 10% is difficult for.And the utility model has been broken through this point, and its experimental data is seen attached list:

The A standard-required	Go out the hot water time (S)	Go out hot water (L/H)	Life-span (H)	Delivery port lowest temperature rise during with power (KW/C °)	The thermal efficiency (%)	Leakage current (MA)
							90	80	1000	2/17 2.5/22 3.0/20	≮80	＜0.75
	B model machine level	3-5	＞82	No external force is rapid wear not	2/20 2.5/24 3.0/22	＞90							Meter reading is zero

Claims (8)

1, a kind of electric heater, it comprises compositions such as shell, water inlet pipe, outlet pipe, controlling organization, electrothermal transducer, it is characterized in that: iron core is housed in the shell, is with skeleton on the main magnetic circuit of iron core, be wound with coil and metal flow water pipe on the skeleton; Metal flow water pipe two ends are connected and fixed the short circuit metallic conductor.

2, electric heater according to claim 1, its feature also is: between described coil and the metal flow water pipe insulating barrier and ground shield are arranged.

3, electric heater according to claim 1, its feature also is: described metal flow water pipe can be around the inner surface or the outer surface of coil, also can be around the centre of coil.

4, electric heater according to claim 1, its feature also is: described iron core can be silicon steel sheet or glass film alloy sheet, presses the 3-20cm sectional area, is fixed as " day " word shape or " mouth " word shape.

5, electric heater according to claim 2, its feature also is: described coil can adopt the insulated wire line directly to turn to for φ 1-φ 4mm; It has a public zero curve tap and 3-5 the tap that power switched is used.

6, electric heater according to claim 2, its feature also is: caliber is selected in φ 3-φ 8mm or φ 3-φ 6.5mm in the described metal flow water pipe, and optimal selection is at φ 4-φ 5mm; Wall thickness is selected in 0.3-2mm or 0.3-1.5mm, optimal selection between O.5-0.75mm, the spiral ring set of described metal flow water pipe coiled, its number of turn is selected in 5-25 circle or 8-15 circle, between the optimal selection 10-12 circle; Its resistance value of the metallic conductor of described metal flow water pipe shorted on both ends≤1O-4 Ω, the metal material of metal flow water pipe can be selected red copper or copper alloy, aluminum or aluminum alloy or stainless steel material for use.

7, electric heater according to claim 5, its feature also is: described iron core can be the ring-type iron core that noncrystalline titanium magnetic material is made.

8, electric heater according to claim 1, its feature also is: described metal flow water pipe is the drinking water overflow pipe, is connected with the boiling water buffer in the water side; Be connected with the cool water quantity control valve at water inlet end.