CN2429779Y

CN2429779Y - Electromagnetic induction water heater with multi-pipe ferrous core

Info

Publication number: CN2429779Y
Application number: CN 00200051
Authority: CN
Inventors: 宋新南
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-01-03
Filing date: 2000-01-03
Publication date: 2001-05-09
Anticipated expiration: 2010-01-03

Abstract

The utility model relates to a water heater which uses alternating current as an energy source and uses the heat generation of an iron core for heating flowing water flow through electromagnetic induction. The utility model is composed of a multipipe iron core which is positioned in an outer pipe, an electromagnetic coil which is wound outside the outer pipe or a magnetic yoke, the magnetic yoke which is suitable for being used under the condition of alternating current and a power factor compensation capacitor which is connected in parallel with the electromagnetic coil, wherein the magnetic yoke is arranged along a field direction outside the outer pipe. The multipipe iron core is formed in the way that a plurality of ferromagnetic-material thin-walled pipes are bundled in the same direction, and is submerged in water flow. The multipipe iron core is conducting magnetic material, a heating element as well as a channel and a heat exchange surface of water flow. No electrical contact exists between a power source and the water flow, so the security is high. The heat exchange area of the heating element is large, and the utility model is immersed in the water flow, so the efficiency is high. The utility model has the advantages of good controllability of induction heating, convenient installation, convenient operation, small volume, less material consumption and low cost.

Description

Multitube iron core electromagnetic induction water heater

The utility model relates to a kind of electromagnetic induction water heater.

At present, known electromagnetic induction water heater structure is to be formed around single ferromagnetic steel tube outside by solenoid.When AC power is added on the solenoid, will in ferromagnetic steel pipe walls, produce induced-current, induced-current produces heat by tube wall resistance again, and then the current that flow through in the heating tube.This water heater has the advantage that electrical security is higher, start-up time is very short with respect to the resistance-type water heater, with respect to gas water heater wholesomeness, property easy to install and the higher thermal efficiency is preferably arranged.But this water heater is owing to the limitation of structure and electromagnetic performance aspect, and requiring has very long electromagnetic heating pipeline section, thereby the shortcoming that volume is big, consumptive material is many, cost is high, power factor is low, integrated heat efficiency is not high is arranged, and security is also high not enough.

The purpose of this utility model provides a kind of electromagnetic induction water heater, it not only has very short start-up time and advantage easy to install, and will be significantly reduced volume, reduce material consumption, reduce cost, improve power factor, improve integrated heat efficiency, improve controllability, and fundamentally guarantee security.

The purpose of this utility model is achieved in that in the outer tube of insulation, heat-resisting and waterproof the multitube iron core is housed, on the outside of outer tube or yoke, be wound with solenoid, be equipped with along outer tube outside magnetic direction and be suitable for the yoke used under the interchange condition, on solenoid, be parallel with power factor compensation capacitance.When solenoid is connected AC power, in the multitube iron core, produce alternating magnetic field, and in each ferromagnetic material light-wall pipe, produce induced-current, induced-current produces heat under the effect of ferromagnetic material light-wall pipe nature resistance, the current heating that the surfaces externally and internally of heat by ferromagnetic material light-wall pipe tube wall will flow through.Wherein the multitube iron core by a plurality of ferromagnetic material light-wall pipes in the same way boundling combine, its axis is parallel with water (flow) direction and magnetic direction.The multitube iron core is permeability magnetic material in this water heater, is the conductive exothermal element, and be the passage and the heat-transfer surface of current again.

Owing to adopt such scheme, a plurality of independently ferromagnetic material light-wall pipes in the multitube iron core will help forming big induced current density and big resistance, thereby help changing electric energy into heat energy, and make water heater have electromagnetic property preferably; The multitube iron core has bigger magnetic conduction sectional area and heat exchange specific area, and is immersed in fully among the heated current, will help improving heating and heat exchange efficiency, reduced volume, minimizing coil and the ferromagnetic material consumption of iron core; Yoke helps reducing the leakage field loss, reduces the consumption of coil and ferromagnetic material; The multitube iron core is immersed in structure in the current and helps not only preventing that it is overheated and initiating failure improves its controllability, but also helps limiting its operating temperature, guarantees its magnetic conductivity, thereby reduces coil and ferromagnetic material consumption; Building-out capacitor helps improving the power factor of water heater, reduces the input apparent energy.Obvious these advantages are reduced volume, minimizing material consumption, reduction cost, the power factor that improves, raising integrated heat efficiency significantly.In addition, insulation, heat-resisting and outer tube waterproof can make power supply and heated current not be electrically connected at all, electric energy just by magnetic field induction to the multitube iron core, the very little and electric current of faradic voltage on the multitube iron core seals, and this has just fundamentally guaranteed to use the security of this water heater bathing.

Below in conjunction with drawings and Examples the utility model is further specified.

Accompanying drawing has provided the schematic diagram of a kind of embodiment with the form of semi-section.In the drawings, the multitube iron core (1) that is positioned at the centre is installed in outer tube (2), solenoid (3) is around the outside of outer tube (2), be positioned at outermost bilateral yoke (4) and constitute magnetic circuit with multitube iron core (1), electric capacity (5) is connected in parallel on solenoid (3) and goes up as reactive power compensation element and solenoid formation main circuit.

In addition, this water heater structurally can also have some distortion to adapt to different conditions, for example save yoke (use intermediate frequency power supply), coil on yoke, adopt one-sided yoke etc., also can also add stronger electronics Power Regulation temperature adjustment function and form the more superior product of performance.

Claims

1. one kind is the electromagnetic induction water heater of the energy with the alternating current, it is characterized in that: the multitube iron core places in the outer tube of insulation, heat-resisting and waterproof, solenoid is outside outer tube or on the yoke, arrange along the magnetic direction outside the outer tube and to be suitable for the yoke used under the interchange condition, power factor compensation capacitance is connected in parallel on the solenoid, and yoke, solenoid, multitube iron core form complete field circuit.

2. multitube iron core electromagnetic induction water heater according to claim 1 is characterized in that: the multitube iron core by many ferromagnetic material light-wall pipes in the same way boundling make, be immersed in the flowing water flow, its axis is parallel with the magnetic line of force and current.

3. multitube iron core electromagnetic induction water heater according to claim 1, it is characterized in that: outer tube is made up of main body and end cap, main body is that one section one end has water inlet (or delivery port), the other end has the pipeline section that the multitube iron core takes on mouth, can hold the described multitube iron core of claim 2, have delivery port (or water inlet) on the end cap, make waterproof with flange or spiral or bonding mode between main body and the end cap and connect, outer tube is made by insulation, heat-resisting and waterproof materials or composite.