CN2228632Y

CN2228632Y - High-efficient safety electric water heater

Info

Publication number: CN2228632Y
Application number: CN 95242971
Authority: CN
Inventors: 祝世权
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-03-27
Filing date: 1995-03-27
Publication date: 1996-06-05
Anticipated expiration: 2005-03-27

Abstract

The utility model relates to a high efficient safety electric water heater. The utility model is characterized in that a water tank is changed to a heat exchange core; an electric heating pipe is arranged in a pore canal of the heat exchange core; a controlling circuit comprising a main circuit, an electric leakage protection circuit and a temperature control circuit is added and arranged on the external part of the heat exchange core, leading to safety; the external part of a heating wire of the electric heating pipe is additionally provided with infrared heating powder and electrothermal film heating powder, so the heating function conversion is strengthened, achieving the purpose of high efficiency. The utility model fundamentally has no electric leakage induction through checking and is a relatively ideal electric water heater.

Description

High-efficiency safety electric water heater

The utility model relates to a kind of electric calorifie installation, particularly a kind of high-efficiency safety electric water heater.

Known electric heater, constitute by water tank and electrothermal tube located therein, electrothermal tube is a metal tube, heating is positioned at the metal tube middle part, be provided with the insulation material layer insulation between heating and metal tube, the running water that the heat of heating is come in to water inlet by metal tube carries out indirect, flows out by delivery port again, and is for people to use.The water heater of this structure not only thermal efficiency is low, and current are little, and easily produces electric leakage, jeopardizes user's personal safety.In recent years, for addressing the above problem, people have done a large amount of research work, as the disclosed batch (-type) electric heater of Chinese patent CN88218039.8, by when heating water not, cut off the electricity supply during water method guarantee safety, this water heater not only needs big capacity tank, and the thermal efficiency is low.Chinese patent 91208510. * disclosed isolation electrical heating shower, by between civil power and electric heating shower, setting up an isolating transformer, reduce voltage, make electric leakage not produce big harm to the person, the electric heater of this structure not only thermal efficiency is low, and the heating rapid wear.

The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of thermal efficiency height, safe and reliable electric heater.

The purpose of this utility model realizes by following technical proposals:

With the water tank of electric heater, change the heat exchanging core in road with holes into, electrothermal tube is located in the heat exchanging core duct, and the heating wire at electrothermal tube middle part is provided with exothermal infrared bisque, insulating barrier, Electric radiant Heating Film heating bisque, mica layer outward successively.External at heat exchanger core; set up a control circuit; it comprises main circuit, leakage protection circuit and temperature control circuit; the main circuit input is provided with a diode and links to each other with resistance and control integrated package are anodal; negative pole links to each other with zero line; leakage protection circuit is to be connected to constant voltage circuit at the main circuit input by electric capacity and resistance and control integrated package, and extremely links to each other relay K with SCR control ₁Link to each other with controllable silicon one end, during operate as normal, controllable silicon conducting, relay K ₁Operate as normal, other draws an electric leakage and surveys probe on the control integrated package, and when the detection probe voltage was higher than constant voltage circuit voltage, control integrated package control controllable silicon disconnected, and makes relay K ₁Quit work.Temperature control circuit comprises that negative wire is by controlling integrated package and relay K ₂The constant voltage circuit that negative pole links to each other and be provided with adjustable resistance, temperature-sensitive element and the temperature control branch road that links to each other with the control integrated package.Relay K ₁Work pin sending and receiving thermal element, K ₂The work pin be connected on K ₁Field circuit on.

Set up a charged magnet valve passage and the contiguous block for preparing valve passage between running water pipe and electric heater, the magnetic valve passage communicates with running water pipe and heat exchanging core duct respectively with preparation valve passage two ends.

Be provided with a field coil in order to magnetized drinking water at the contiguous block position.

Parallel connection one is provided with the holding circuit of Zener diode and electric capacity on control circuit.

Set up a leakage protection circuit in the contiguous block outside, circuit structure is identical with the leakage protection circuit of control circuit.

Accompanying drawing and drawing explanation:

Fig. 1 is a contiguous block sectional structure diagrammatic sketch of the present utility model;

Fig. 2 is the utility model longitudinal section;

Fig. 3 is the utility model circuit diagram.

In conjunction with the embodiments the utility model is further described with reference to the accompanying drawings below: as shown in Figure 1; between running water and electric heater, be provided with the contiguous block of charged magnet valve 1 passage and preparation valve 3 passages; magnetic valve passage 2 is divided equally other with preparation valve passage 4 two ends and is communicated with running water pipe and heat exchanging core duct; be provided with a magnetizing coil 5 at the contiguous block position; as shown in Figure 2; be provided with electrothermal tube 7 in the heat exchanging core duct 6; resistance wire 8 is positioned at the middle part of pipe; be followed successively by exothermal infrared bisque 9 outside it; ceramic insulating layer 10; Electric radiant Heating Film heating bisque 11 and mica splittings 12; as shown in Figure 3; the external control circuit of setting up of heat exchanging core; it comprises main circuit; leakage protection circuit and temperature control circuit, main circuit input are provided with a commutation diode D ₁With the pressure limiting resistance R ₁, make it become low-voltage direct, and link to each other with positive terminal 8 pin of control integrated package, control negative pole 4 pin of integrated package and be provided with dropping resistor R ₄Zero line link to each other, form the main circuit of control integrated package.Leakage protection circuit is by a capacitor C at the main circuit input ₂With adjustable resistance RV ₁Link to each other with integrated package 2 pin, make it to import a fixed voltage, be defeated by the SCR control utmost point, make its conducting, make relay K through 1 pin to integrated circuit ₁Operate as normal is simultaneously drawn an electric leakage and is surveyed probe 13 on control integrated package 3 pin, when electric leakage is surveyed the probe return voltage and is higher than 2 pin voltages, by 1 foot control system controllable silicon BT ₁Disconnect, make relay K ₁Quit work.Said temperature control circuit comprises from the negative pole end lead-in wire by adjustable resistance RV ₃Link to each other with control integrated package 5 pin and pass through 7 pin and K ₂Negative pole links to each other, and forms constant voltage circuit, is provided with a temperature control branch road by negative pole in addition, which is provided with adjustable resistance RV ₄, RV ₅Temperature-sensitive element RT, and link to each other with integrated package 6 pin, when the temperature control branch voltage is lower than constant voltage circuit, make K ₂Quit work K ₁, K ₂Anodal and be connected on the main circuit electrode line K ₁Be to add electrothermal relay, K ₂Be that control adds electrothermal relay, K ₁, K ₂All be to make it work, so their connected mode is K by the field coil voltage that control circuit is imported ₁Magnetic field voltage import K by control circuit ₁Work pin sending and receiving thermal element, K ₂Magnetic field voltage also be that its work pin is connected on K by control circuit input ₁The loop of field circuit in, make it controlled.In case of necessity, outside contiguous block, set up one with control circuit in the identical leakage protection circuit of leakage protection circuit structure, make creepage protection function more reliable.

Unlikely too high for the voltage that guarantees control circuit, prevent that inverse peak voltage from burning out relay contact, can on control circuit, parallel connection one be provided with zener diode D ₂, capacitor C ₃Holding circuit.

From above-mentioned situation as can be known, the purpose of this utility model can realize, undertaken by exothermal infrared powder and Electric radiant Heating Film heating powder in the heat-generating pipe on the one hand that hot merit can change and electrostatic sheild closes processing, improved the thermal efficiency greatly and stopped leakage inductance and answer.Play the efficient energy-saving effect.Set up control circuit on the other hand, in case electric leakage, when the electric leakage probe was higher than the fixed voltage of control integrated package 2 pin by return voltage, the control controllable silicon disconnects, and was safe and reliable.Temperature control circuit makes temperature constant in addition, in case discharge is very few, temperature rises when surpassing predetermined value, relay K ₂Just control K ₁Quit work, the people can not scalded.Simultaneously, magnetic valve promptly cuts out when mains failure or when electric leakage, and water arrheas, and makes it safer, and can open the preparation valve this moment, guarantees to supply water.

Claims

1, a kind of high-efficiency safety electric water heater, form by shell, electrothermal tube, water tank, intake-outlet etc., it is characterized in that: the heating wire at electrothermal tube middle part is provided with exothermal infrared bisque, insulating barrier, Electric radiant Heating Film heating bisque, mica splittings outward successively, change water tank into heat exchanging core, electrothermal tube is located in the heat exchanging core duct, the external control circuit of setting up of heat exchanger core, it comprises main circuit, leakage protection circuit and temperature control circuit; The main circuit input is provided with a diode and links to each other with anodal 8 pin of resistance and control integrated package, and negative pole 4 pin link to each other with zero line, and leakage protection circuit is to pass through capacitor C at the main circuit input ₂With resistance R V ₁Link to each other with control integrated package 2 pin, extremely link to each other with SCR control, draw an electric leakage at control integrated package 3 pin in addition and survey probe through control integrated package 1 pin; Temperature control circuit comprises that negative wire and resistance and control integrated package 5 pin link to each other and pass through 7 pin and relay K ₂The constant voltage circuit that negative pole links to each other, and be provided with adjustable resistance, temperature-sensitive element and the temperature control that links to each other with control integrated package 6 pin are propped up circuit, K ₁Work pin sending and receiving thermal element, K ₂The work pin be connected on K ₁Field circuit on.

2, high-efficiency safety electric water heater according to claim 1, it is characterized in that: set up a charged magnet valve passage and the contiguous block for preparing valve passage between running water pipe and electric heater, the magnetic valve passage links to each other with running water pipe and electric heating exchange core body duct respectively with preparation valve passage two ends.

3, high-efficiency safety electric water heater according to claim 2 is characterized in that: the contiguous block position is provided with a field coil.

4, high-efficiency safety electric water heater according to claim 2 is characterized in that: contiguous block is provided with a leakage protection circuit outward, and its structure is identical with the control circuit leakage protection circuit.

5, high-efficiency safety electric water heater according to claim 1 is characterized in that: parallel connection one is provided with the holding circuit of Zener diode and electric capacity on the control circuit.