CN201028758Y - Anti-creep water heater - Google Patents
Anti-creep water heater Download PDFInfo
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- CN201028758Y CN201028758Y CNU2007201412625U CN200720141262U CN201028758Y CN 201028758 Y CN201028758 Y CN 201028758Y CN U2007201412625 U CNU2007201412625 U CN U2007201412625U CN 200720141262 U CN200720141262 U CN 200720141262U CN 201028758 Y CN201028758 Y CN 201028758Y
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Abstract
The utility model relates to an anti-leakage electric heater which includes a shell, a liner, a grounding wire, an electric heating pipe, a damping isolating signal collecting device and an electricity-leakage protecting device. The damping isolating signal collecting device includes a hollow insulating pipe which is communicated with the liner, a signal collecting element which has a contact surface which is contacted with the water flows from the insulating pipe into the liner or from the liner into the insulating pipe and collects the and sends signals into the electricity-leakage protecting device. The electricity-leakage protecting device collects the standard electric potential of the water in the liner and differentially compared the standard electric potential with the actual electric potential. When the signal differential exceeds the safe voltage, namely, 24V, the power supply is cut off. The electric potential signal generated through the voltage reducing of the insulating pipe matches with the protection of the electricity-leakage protecting device to the heater when the electricity leakage happens, with the insulating pipe far shorter than the insulating pipe in the prior electricity preventing wall. The utility model has a small structure, occupies little area and is convenient in assembly and disassembly.
Description
Technical field
The present invention relates to a kind of electric heater, particularly a kind of electricity-leak-prevention water heater.
Background technology
Existing electric heater generally adopts " Fang Dianqiang " technology aspect proof and electric leakage-proof safety.This technology installs one very big " resistance " additional between human body and water, in case leaky takes place, this " resistance " can bear most pressure drop, thereby the pressure drop that human body is born is very little.This " resistance " is that the insulation tube of 53 times of its endoporus radius squared length is realized by installation length on inlet tube and outlet tube.
As the disclosed patent No. of Patent Office of the People's Republic of China be: 01135300.7, name is called: the patent of invention of anti-electric shock type electric water heater.Its disclosed technical scheme is at water inlet pipe and outlet pipe place insulation tube to be installed.In order to improve resistivity of water in the insulation tube of flowing through, produce pressure drop, reduce greatly and flow out the electrified voltage in the water behind the insulation tube, to reach the safe voltage scope of human body, promptly said " Fang Dianqiang " technology.Generally the length of insulation tube L to be made as more than 53 times of endoporus radius r squared length, that is: L＞53r
2In this scheme, in order to satisfy above-mentioned requirements, the length of its insulation tube is very long, gives to install and use and has brought very big inconvenience.What have makes crooked shape to insulation tube in order to reduce length, screw type, shapes such as M shape.In addition, in this scheme, the circuit after the electric leakage does not disconnect protective device and warning device etc.After water heater electric leakage, its effect will flow out just that the electrified voltage of water is reduced in the safe voltage scope of human body in the insulation tube, and not be further power down process and alarm user for the electric leakage situation.So just cause the user also ignorant under the situation that water heater has leaked electricity, also just can not take follow-up remedial measure.Above-mentioned situation generation back as untimely deenergization are also notified the user, and fault can not get getting rid of timely, and potential safety hazard still exists, and for the user, is unsafe.Also can cause simultaneously water heater fault rate height, shorten service life.
If an earth leakage circuit-breaker and warning device just are installed on the basis of existing " Fang Dianqiang " water heater in addition, not only raise the cost, and also complex structure, the installation and maintenance inconvenience.And such conceptual design makes between " Fang Dianqiang " technology and earth leakage circuit-breaker and the warning device and can not cooperatively interact, the co-operating earth leakage protective of carrying out.
Summary of the invention
In order to solve deficiency of the prior art, the invention provides a kind of electricity-leak-prevention water heater.In water inlet tube of water heater and outlet pipe place damping isolation signals harvester is installed, this damping isolation signals harvester comprises an insulation tube, the ratio of the length of insulation tube L and its endoporus radius r square is far smaller than 53 times, establish a signal exit on the insulation tube, the electric potential signal of water and input to the control circuit and the warning circuit of water heater in collection water supply of signal exit and the discharge pipe line, the electric potential signal in the water intaking and input to the control circuit of water heater in inner bag simultaneously." Fang Dianqiang " technology and existing earth leakage protective device are effectively combined.Water heater electric leakage, charged power-off protection and the warning of water heater earth connection are provided, also can detect the potential difference significant change and propose warning the charged situation of water pipe.
The technical solution used in the present invention is: a kind of electricity-leak-prevention water heater, comprise a shell, the inner bag that is positioned at shell and insulate mutually, the earth connection that is connected with inner bag with shell, be installed on the electric heating tube in the inner bag, and the earth leakage protective device that is electrically connected with electric heating tube; It is characterized in that: also comprise damping isolation signals harvester, damping isolation signals harvester comprises the insulation tube of hollow, and insulation tube is connected with inner bag, and the diameter of bore of insulation tube is between 4～8mm, and length is between 40～160mm; Damping isolation signals harvester also comprises the signals collecting part, the signals collecting part is connected with the signal input part of earth leakage protective device, the signals collecting part has a contact-making surface, contact-making surface contacts with the water that flows into the water the inner bag from insulation tube or flow out insulation tube from inner bag, gather the electric potential signal in the water, and the signal input part of input earth leakage protective device; The signal input part of inner bag and earth leakage protective device is electrically connected, and the reference potential signal of water in the inner bag is imported the signal input part of earth leakage protective device; Earth leakage protective device carries out difference relatively with reference potential signal and the electric potential signal of input, when signal difference during above safe voltage 24V, i.e. and deenergization.
The present invention also adopts following attached technical scheme: the two ends of insulation tube are separately installed with first connector and second connector, and second connector is the metallic conduction material; Second connector is the signals collecting part, first connector and the second connector mutually insulated separate, first connector is connected with water inlet pipe, outlet pipe on the water heater liner, second connector is connected with supply channel, the discharge pipe line of water heater, second connector has a contact-making surface, and contact-making surface contacts with water in the pipeline;
First connector is a hold-down nut, second connector is the set bolt of a hollow, and damping isolation signals harvester also comprises a fixed axis, and insulation tube is designed to an inserts, one end of fixed axis embeds in the body of insulation tube, and the other end flexibly connects mutually with hold-down nut; Set bolt is socketed on the insulation tube, and an end embeds in the body of insulation tube, and the end face of the other end is a contact-making surface, and contact-making surface contacts with the supply channel of water heater, the water in the discharge pipe line; Set bolt is provided with the signal exit, and the signal input part that the signal exit passes from insulation tube with earth leakage protective device is electrically connected;
Damping isolation signals harvester is 2, is connected to water inlet pipe, outlet pipe on the water heater liner;
Insulation tube adopts enhancing nylon insulating materials to make;
The diameter of bore of insulation tube is 5mm, and length is 73mm; Or diameter of bore is 6mm, and length is 120mm;
Earth leakage protective device comprises leakaging signal detecting circuit a, signal control circuit b, power circuit c; Leakaging signal detecting circuit a comprises first resistance, the first electric leakage indicator lamp, the 11 resistance, the second electric leakage indicator lamp, one end of first resistance and the 11 resistance is the input of the reference potential signal of inner bag, and the other end of the first electric leakage indicator lamp and the second electric leakage indicator lamp is the input of the electric potential signal of damping isolation signals harvester; The other end of the 11 resistance is connected with an end of the second electric leakage indicator lamp and forms a leakage alarm, and the 11 resistance other end is connected with an end of the second electric leakage indicator lamp;
Signal control circuit b comprises second resistance, the 3rd resistance, the 4th resistance, second operational amplifier, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 3rd operational amplifier, the 9th resistance, the tenth current potential, buzzer B, second triode, relay, first triode; One end of second resistance is connected with positive supply+Vcc, the other end respectively with the 3rd resistance, one end of the 4th resistance is connected, the other end of the 3rd resistance is connected with the anode of second operational amplifier, the other end of the 4th resistance is connected with earth electrode, the negative terminal of second operational amplifier is connected and is connected with an end of the 5th resistance, the other end of the 5th resistance respectively with the 7th resistance one end, the 3rd operational amplifier anode is connected, the negative terminal of the 3rd operational amplifier is respectively with the 6th resistance one end and the 8th resistance one end and connect, the 6th resistance other end is connected with positive supply+Vcc, the 8th resistance other end is connected with earth electrode, the 7th resistance other end respectively with an end of the output of the 3rd operational amplifier and the 9th resistance mutually and connect, one end of the tenth resistance is connected with the other end of the output of the 3rd operational amplifier and the 7th resistance, the other end of the tenth resistance is connected with the base stage of second triode, the colelctor electrode of second triode is connected with an end of buzzer, emitter stage is connected with earth electrode: the other end of buzzer is connected with positive supply+Vcc, the base stage of triode is connected in the other end of the 9th resistance, colelctor electrode is connected with an end of relay, and emitter stage is connected with earth electrode;
Relay inside comprises first contact and second contact, and first contact is connected with power line, and the other end is connected with an end of electric heating tube, and second contact, one end is connected with power line, and the other end is connected with the other end of electric heating tube;
One insulated isolated device is installed between inner bag and the shell, insulated isolated device comprises that one is installed on the stator on the inner bag housing, stator be shaped as U-shaped, and form the U-shaped air strike between the inner bag housing, have first through hole on the stator, corresponding respectively insulation inserts and the insulation spacer of being provided with on two sides of stator, and be mutually permanently connected, the insulation inserts is provided with screwed hole, insulation spacer has second through hole, screwed hole is corresponding with first through hole respectively with second through hole, has third through-hole on the outer cover body, is fixed with a body of wall fixture that is installed on the metope on the shell, have fourth hole on the body of wall fixture, pass fourth hole by a bolt between body of wall fixture and shell and the inner bag, be threaded fixing mutually with screwed hole behind the third through-hole, second through hole and first through hole;
Have two first through holes on the stator, corresponding with it, insulation inserts and insulation spacer are respectively two, and the third through-hole on the shell also is two, and the fourth hole on the body of wall fixture also is two.
The beneficial effect that adopts the present invention to bring: (1) damping isolation signals harvester is established a signal exit on its insulation tube, and is connected with control circuit, warning circuit on the water heater.At insulation tube electric leakage is carried out increasing leakage switch protection and warning function on the basis of pressure drop protection.Make existing " Fang Dianqiang " technology and earth leakage circuit-breaker, warning device is combined as a whole, and cooperatively interacts to carry out earth leakage protective, and is intelligent more, and use simultaneously is safer, and structure is more simplified, and is easy for installation.(2) the signal exit on the damping isolation signals harvester is gathered the electric potential signal in supply channel and the discharge pipe line, and inputs in the control circuit and warning circuit of water heater.All water into and out of water heater must be through overdamp isolation signals harvester, one side is reduced to the Leakage Current of the water outlet of water heater below the 5mA, and with water heater liner and water inlet pipe isolation, the Leakage Current that makes situations such as electric leakage and ground wire electrification be transmitted to inlet pipeline also is reduced to below the 5mA, guarantee that electric leakage and ground wire electrification can not damage human body by the mixed water of water outlet and inlet pipeline, further improve the security of water heater.(3) in case water heater liner electric leakage, the insulation tube of damping isolation signals harvester at first carries out step-down to electric leakage to be handled, the collection of signal exit after step-down signal and input to control circuit and warning circuit in, remind the user when cutting off the electricity supply.On anti-creeping basis, accomplish that potential safety hazard in time finds, in time get rid of.(4) when slight electrification phenomenon takes place owing to some situation in the water in the inner bag; because voltage is lower; electric potential signal to the signals collecting end after the insulation tube step-down can be ignored, and at this moment just can not produce false touch and move, and has improved the sensitivity and the accuracy rate of earth leakage protective device.(5) to 8mm, length L arrives 160mm at 40mm at 4mm for the insulation tube in the damping isolation signals harvester of the present invention, its diameter.Length much smaller than existing insulation tube.Charged current are behind overdamp isolation signals harvester, by national examination criteria voltage is 220V, using water temperature is 25 ± 5 ℃, resistivity is that Leakage Current is no more than 5mA under the situation of code test water of 1250 ± 50 Ω .cm, satisfies the requirement of GB4706.12-2006 " specific (special) requirements of the safe storage-type electric water heater of family expenses and similar applications electrical equipment " standardization appendix A A to Leakage Current fully.Insulation tube length is the ratio of 53 times of its endoporus radius squared in existing " Fang Dianqiang " technology.Structure is smaller and more exquisite, do not take up room, and easy installation and removal, the system of being convenient to is optimized.(6) the present invention installs insulated isolated device between water heater liner and shell, inner bag and casing insulation are separated, whole water heater liner and external environment condition are in state of insulation, make electric leakage not be transmitted to external environment condition by water heater, guarantee the Electrical Safety of water heater.(7) the electric leakage indicator lamp in the leakage alarm of the present invention drives luminous by potential difference, the suitable resistance of connecting, when surpassing the 24V potential difference, just can drive luminous, so long as the charged reason of water heater electric leakage, ground wire electrification and water pipe is not eliminated, the potential difference of damping isolation signals harvester output will continue to exist, the electric leakage indicator lamp also will continue luminous, till problem solves.Well play and find fault and warning, monitor the effect whether fault is got rid of simultaneously, and principle, simple in structure, low cost of manufacture.
Figure of description
Fig. 1 for electric heater of the present invention each the device between be electrically connected and wiring schematic diagram the interconnected relationship between earth leakage protective device shown in the figure, damping isolation signals harvester, inner bag, leakage alarm, power supply and the ground connection motor;
Fig. 2 is the perspective view of damping isolation signals harvester of the present invention;
Fig. 3 is the Facad structure schematic diagram of damping isolation signals harvester of the present invention;
Fig. 4 is the cutaway view of Fig. 3;
Fig. 5 is that the A-A of Fig. 3 is to view;
Fig. 6 is the circuit diagram of earth leakage protective device internal signal control circuit of the present invention;
Fig. 7 is the circuit diagram of earth leakage protective device interior power supply circuit of the present invention;
Fig. 8 is the generalized section of the insulated isolated device that installs additional between inner bag of the present invention and the shell; The structure of insulated isolated device is shown;
Fig. 9 splits schematic diagram for the parts of insulated isolated device of the present invention;
Figure 10 is installed in structural representation on the inner bag for insulated isolated device of the present invention;
The structural representation that Figure 11 is connected with shell for insulated isolated device of the present invention;
The specific embodiment
Below in conjunction with accompanying drawing the present invention is done further detailed description:
As Fig. 1 to a kind of electricity-leak-prevention water heater shown in Figure 12, comprise a shell 3, the inner bag 1 that is positioned at shell 3 and insulate mutually, the earth connection that is connected with inner bag 1 with shell 3, be installed on the electric heating tube in the inner bag 1, and the earth leakage protective device 4 that is electrically connected with electric heating tube; Also comprise damping isolation signals harvester 2; damping isolation signals harvester 2 comprises the insulation tube 21 of hollow; insulation tube 21 is connected with inner bag 1; damping isolation signals harvester 2 also comprises the signals collecting part; the signals collecting part is connected with the signal input part of earth leakage protective device 4; the signals collecting part has a contact-making surface S; this contact-making surface S contacts with the water that flows into the water the inner bags 1 from insulation tube 21 or flow out insulation tube 21 from inner bag 1; gather the electric potential signal in the water, and the signal input part of input earth leakage protective device 4.Inner bag 1 is electrically connected with the signal input part of earth leakage protective device 4, gathers the reference potential signal of water in the inner bag 1.Earth leakage protective device 4 carries out difference relatively with reference potential signal and the electric potential signal of input, when signal difference during above safe voltage 24V, i.e. and deenergization.
In the present embodiment, insulation tube 21 adopts enhancing nylon insulating materials to make.The effect that insulation tube 21 plays is that convection current is carried out the step-down processing through the water of insulation tube 21, makes the voltage of water reach the safe voltage that human body can bear when inner bag 1 electric leakage.I.e. " Fang Dianqiang " principle.As shown in Figure 5, the arrow at insulation tube 21 two ends represents that variation has taken place through hole, two ends voltage, and the voltage after insulation tube 21 step-downs is lower than the voltage in the inner bag.When inner bag 1 electric leakage, insulation tube 21 not only carries out step-down to the water at outlet pipe 12 places to be handled, and also simultaneously the water at water inlet pipe 11 places is carried out step-down and handles, with the supply channel leakproof of guaranteeing to be connected with water inlet pipe 11.Also avoid simultaneously owing to reasons such as ground wire electrification cause the charged situation of inner bag 1.
Among the present invention, charged current are behind overdamp isolation signals harvester, by national examination criteria voltage is 220V, using water temperature is 25 ± 5 ℃, resistivity is that Leakage Current is no more than 5mA under the situation of code test water of 1250 ± 50 Ω .cm, satisfies the requirement of GB4706.12-2006 " specific (special) requirements of the safe storage-type electric water heater of family expenses and similar applications electrical equipment " standardization appendix A A to Leakage Current fully.Insulation tube length is the ratio of 53 times of its endoporus radius squared in " anti-electricity is strong " technology much smaller than having now.Structure is smaller and more exquisite, do not take up room, and easy installation and removal, the system of being convenient to is optimized.The length of insulation tube 21 of the present invention can be between 40mm to 160mm, its diameter of bore at 4mm between the 8mm.Preferred scheme is 120mm for insulation tube length, and diameter of bore is 6mm, or length is 73mm, and diameter of bore is 5mm.
To shown in Figure 5, the two ends of insulation tube 21 are separately installed with first connector and second connector as Fig. 1, and second connector is the metallic conduction material.Second connector is the signals collecting part, first connector and the second connector mutually insulated separate, first connector is connected with water inlet pipe 11, outlet pipe 12 on the water heater liner 1, second connector is connected with supply channel, the discharge pipe line of water heater, second connector has a contact-making surface S, and this contact-making surface S contacts with water in the pipeline.In the present embodiment, first connector is a hold-down nut 22, and it is connected with outlet pipe 12 with water inlet pipe 11; Second connector is the set bolt 23 of a hollow, and it is connected with discharge pipe line with the supply channel of water heater.Damping isolation signals harvester 2 also comprises a fixed axis 24, and insulation tube 21 is designed to an inserts, and an end of fixed axis 24 embeds in the body of insulation tube 21, and the other end flexibly connects mutually with hold-down nut 22.Set bolt 23 is socketed on the insulation tube 21, and an end embeds in the body of insulation tube 21, and the end face of the other end is contact-making surface S, and this contact-making surface S contacts with the supply channel of water heater, the water in the discharge pipe line.Set bolt 23 is provided with a signal exit 231, and the signal input part that signal exit 231 passes from insulation tube 21 with earth leakage protective device 4 is electrically connected, and the electric potential signal that gets access to is inputed in the earth leakage protective device 4.
In the present embodiment, damping isolation signals harvester 2 is 2, is installed in respectively on water inlet pipe 11 and the outlet pipe 12.The other end of damping isolation signals harvester 2 is connected with discharge pipe line with the supply channel of water heater again.Signal exit 231 in the damping isolation signals harvester 2 inputs to the electric potential signal of water in supply channel and the discharge pipe line in the signal input part and leakage alarm 5 of connected earth leakage protective device 4.
As shown in Figure 6, earth leakage protective device 4 comprises leakaging signal detecting circuit a, signal control circuit b, power circuit c.Leakaging signal detecting circuit a comprises first resistance R 1, the first electric leakage indicator lamp L1, the 11 resistance R 11, the second electric leakage indicator lamp L2, one end of first resistance R 1 and the 11 resistance R 11 is the input of the reference potential signal of inner bag 1, and the other end of the first electric leakage indicator lamp L1 and the second electric leakage indicator lamp L2 is the input of the electric potential signal of damping isolation signals harvester 2; The other end of first resistance R 1 is connected with the end of the first electric leakage indicator lamp L1, the other end of the 11 resistance R 11 is connected with the end of the second electric leakage indicator lamp L2 and forms a leakage alarm 5, the 11 resistance R 11 other ends and be connected with second end that leaks electricity indicator lamp L2.When the difference of the electric potential signal of the reference potential signal of inner bag 1 and damping isolation signals harvester 2 surpasses safe voltage 24V, the electric potential signal of damping isolation signals harvester 2 lights the first electric leakage indicator lamp L1 and the second electric leakage indicator lamp L2 through first resistance R 1 and the 11 resistance R 11, when the difference of the electric potential signal of the reference potential signal of inner bag 1 and damping isolation signals harvester 2 surpassed safe voltage 24V, the electric potential signal of damping isolation signals harvester 2 can not make the first electric leakage indicator lamp L1 or the second electric leakage indicator lamp L2 light.In leakaging signal detecting circuit, in the leakage alarm 5 second electric leakage indicator lamp L2 drives luminous by potential difference, the electric leakage indicator lamp is generally the neon lamp bulb, the suitable resistance of connecting, when surpassing the current potential difference of safety, just can drive luminous, also can suitably adjust the luminous potential difference of electric leakage indicator lamp by adjusting resistance for avoiding voltage pulsation, so long as water heater electric leakage, the charged reason of ground wire electrification and water pipe is not eliminated, the signal of damping isolation signals harvester 2 outputs will continue to exist, the electric leakage indicator lamp also will continue luminous, till problem solves.This is a kind of simple and reliable low-cost warning system.
Signal control circuit b comprises second resistance R, 2, the three resistance R, 3, the four resistance R, 4, the second operational amplifier IC2, the 5th resistance R 5, the six resistance R 6, the seven resistance R 7, the eight resistance R 8, the three operational amplifier IC3, the 9th resistance R 9, relay J, triode T1; One end of second resistance R 2 is connected with positive supply+Vcc, the other end respectively with the 3rd resistance R 3, one end of the 4th resistance R 4 is connected, the other end of the 3rd resistance R 3 is connected with the anode of the second operational amplifier IC2, the other end of the 4th resistance R 4 is connected with earth electrode, the negative terminal of the second operational amplifier IC2 is connected and is connected with an end of the 5th resistance R 5, the other end of the 5th resistance R 5 respectively with the 7th resistance R 7 one ends, the 3rd operational amplifier IC3 anode is connected, the negative terminal of the 3rd operational amplifier IC3 is respectively with the 6th resistance R 6 one ends and the 8th resistance R 8 one ends and connect, the 6th resistance R 6 other ends are connected with positive supply+Vcc, the 8th resistance R 8 other ends are connected with earth electrode, the 7th resistance R 7 other ends respectively with an end of the output of the 3rd operational amplifier IC3 and the 9th resistance R 9 mutually and connect, the base stage of triode T1 is connected in the other end of the 9th resistance R 9, colelctor electrode is connected with an end of relay J, and emitter stage is connected with earth electrode.When the water heater electric leakage, the first electric leakage indicator lamp L1 and the second electric leakage indicator lamp L2 are luminous among the leakaging signal detecting circuit a, the resistance of second resistance R 2 reduces, current potential between second resistance R 2 and the 4th resistance R 4 rises to high level, be input to the anode of the second operational amplifier IC2 through the 3rd resistance R 3, make the anode of the second operational amplifier IC2 become high level, the output of the second operational amplifier IC2 also becomes high level, the high voltage of the second operational amplifier IC2 is input to the 3rd operational amplifier IC3 through the 5th resistance R 5, make the positive terminal potential of the 3rd operational amplifier IC3 be higher than the negative terminal current potential, the output potential that makes the 3rd operational amplifier IC3 is a high level, high level is through the 9th resistance R 9, drive triode T1, make triode T1 conducting, the colelctor electrode of triode T1 and the potential difference between the emitter stage reduce, and the potential difference at relay J two ends strengthens, and makes the relay J adhesive.When the output potential of operational amplifier IC3 is high level, high level is through the tenth resistance R 10, drive triode T2, make triode T2 conducting, the colelctor electrode of triode T2 and the potential difference between the emitter stage reduce, the potential difference at buzzer B two ends strengthens, and makes buzzer B warnings of sounding, and the prompting user has electric leakage signal.Two contacts of relay J inside are shown is break-makes of how controlling electric heating tube and power supply to the circuit diagram of b1 part among Fig. 6, be specially: relay J inside comprises the first contact K1 and the second contact K2, the first contact K1 is connected with power line L1, the other end is connected with an end L2 of electric heating tube, the second contact K2, one end is connected with power line N1, and the other end is connected with the other end N2 of electric heating tube.The annexation of relay J and electric heating tube and power line shown in Fig. 6 b1, when the relay J adhesive, the first contact K1 of relay J and the second contact K2 disconnect, thereby cut off the electricity supply.
As shown in Figure 7, power circuit c comprises transformer Tr, four diode 1N4007, first capacitor C 1, integrated voltage stabilizer IC17805 and second capacitor C 2.Transformer Tr is elementary to be connected with power supply phase line L1, zero line N1, and the secondary rectification circuit of forming with four diodes is connected; The anode of the rectification circuit that first capacitor C 1 and four diodes are formed is connected with 7805 input, and the other end is connected with earth electrode; Second capacitor C 2 is connected with integrated voltage stabilizer IC17805, and the other end is connected with earth electrode; When supply voltage was 220V, the voltage of+Vcc was 5V.
Anticreep principle of the present invention is that the inner bag of water heater and external environment condition are isolated, and stops electric leakage to be delivered to external environment condition.Into and out of the current of water heater insulation tube 21 through overdamp isolation signals harvester 2, produce the effect of damping step-down and reduction Leakage Current by the water self-resistance, and the signal alarm that produces of the current potential difference of the electric potential signal by 2 inputs of the reference potential signal in the inner bag 1 and damping isolation signals harvester and live wire and the zero line that cuts off water heater, stop the water heater electric leakage, ground wire electrification is isolated damping below the 5mA of safety.
When the water in the inner bag 1 owing to some situation slight electrification phenomenon took place, because voltage is lower, the electric potential signal to signals collecting end 231 after insulation tube 21 step-downs was very faint, can ignore, and at this moment just can not produce false touch and move.At inner bag 1 real electric leakage situation takes place only, voltage in the inner bag 1 is about 220V or when higher, at this moment after insulation tube 21 step-downs are handled, also have certain voltage in the water, but at this moment in the water with voltage be reduced in the safe range of human body, can't make the user produce the danger of contact.The sensitivity and the accuracy rate of earth leakage protective device have been improved.This signal is gathered and inputs to the signal control circuit in the earth leakage protective device by signal exit 231; signal control circuit carries out the difference comparative analysis with the electric potential signal of reference potential signal in the inner bag 1 and 2 inputs of damping isolation signals harvester; after the potential difference value signal surpasses 24V; to send instruction; cut off the live wire and the zero line of water heater; guarantee thoroughly to solve the factor of water heater electric leakage; the alarm signal of signal control circuit output electric leakage; send chimes of doom; till chimes of doom will last till that problem solves and re-powers, guarantee the validity of warning system.
As shown in Figs. 8 to 11, between inner bag 1 and the shell 3 insulated isolated device is installed, insulated isolated device comprises that one is installed on the stator 6 on inner bag 1 housing, stator 6 be shaped as U-shaped, and form the U-shaped air strike between inner bag 1 housing, have first through hole 61 on the stator 6, corresponding respectively insulation inserts 7 and the insulation spacer 8 of being provided with on 6 two sides of stator, and be mutually permanently connected, insulation inserts 7 is provided with screwed hole 71, insulation spacer 8 has second through hole 81, screwed hole 71 is corresponding with first through hole 61 respectively with second through hole 81, have third through-hole on shell 3 bodies, be fixed with a body of wall fixture 31 that is installed on the metope on the shell 3, have fourth hole on the body of wall fixture 31, pass fourth hole by a bolt 9 between body of wall fixture 31 and shell 3 and the inner bag 1, third through-hole, second through hole 81 is threaded fixing with first through hole, 61 backs with screwed hole 71 mutually.Have two first through holes 61 on the stator 6, corresponding with it, insulation inserts 7 and insulation spacer 8 are respectively two, and the third through-hole on the shell 3 also is two, and the fourth hole on the body of wall fixture 31 also is two.The width of insulation inserts 7 and insulation spacer 8 is greater than the width of stator 6, on insulation inserts 7 and insulation spacer 8 expose to body outside stator 6 dual-sides, have corresponding screwed hole 72 and through hole 82, pass through hole 82 by screw 10 between insulation inserts 7 and the insulation spacer 8 and fixedly connected with screwed hole 72.Connecting so effectively insulate inner bag 1 separates with shell 3, can not be transmitted to external environment condition by shell when making inner bag charged, increases the danger of electric leakage.Certainly in order to reach inner bag 1 and the purpose that shell 3 insulation separate, several different methods can be arranged.Can adopt insulating materials making inner bags 1 such as pottery.
Claims (11)
1. electricity-leak-prevention water heater, comprise a shell (3), the inner bag (1) that is positioned at described shell (3) and insulate mutually with described shell (3), the earth connection that is connected with described inner bag (1), be installed on the electric heating tube in the described inner bag (1), and the earth leakage protective device (4) that is electrically connected with described electric heating tube; It is characterized in that: also comprise damping isolation signals harvester (2), described damping isolation signals harvester (2) comprises the insulation tube (21) of hollow, described insulation tube (21) is connected with described inner bag (1), the diameter of bore of described insulation tube (21) is between 4～8mm, and length is between 40～160mm; Described damping isolation signals harvester (2) also comprises the signals collecting part, described signals collecting part is connected with the signal input part of described earth leakage protective device (4), described signals collecting part has a contact-making surface (S), described contact-making surface (S) with flow into from described insulation tube (21) the inner bag (1) water or from inner bag (1) water of outflow insulation tube (21) contact, gather the electric potential signal in the water, and the signal input part of input earth leakage protective device (4); Described inner bag (1) is electrically connected with the signal input part of described earth leakage protective device (4), the reference potential signal of water in the described inner bag (1) is imported the signal input part of described earth leakage protective device (4); Described earth leakage protective device (4) carries out difference relatively with reference potential signal and the electric potential signal of input, when signal difference during above safe voltage 24V, i.e. and deenergization.
2. a kind of electricity-leak-prevention water heater according to claim 1 is characterized in that: the two ends of described insulation tube (21) are separately installed with first connector and second connector, and described second connector is the metallic conduction material; Described second connector is described signals collecting part, described first connector and the second connector mutually insulated separate, described first connector is connected with water inlet pipe (11), outlet pipe (12) on the described water heater liner (1), second connector is connected with supply channel, the discharge pipe line of water heater, described second connector has a contact-making surface (S), and described contact-making surface (S) contacts with water in the pipeline.
3. a kind of electricity-leak-prevention water heater according to claim 2, it is characterized in that: described first connector is a hold-down nut (22), second connector is the set bolt (23) of a hollow, described damping isolation signals harvester (2) also comprises a fixed axis (24), described insulation tube (21) is designed to an inserts, one end of described fixed axis (24) embeds in the body of described insulation tube (21), and the other end flexibly connects mutually with described hold-down nut (22); Described set bolt (23) is socketed on the insulation tube (21), and an end embeds in the body of described insulation tube (21), and the end face of the other end is contact-making surface (S), and described contact-making surface (S) contacts with the supply channel of water heater, the water in the discharge pipe line; Described set bolt (23) is provided with signal exit (231), and the signal input part that described signal exit (231) passes from described insulation tube (21) with described earth leakage protective device (4) is electrically connected.
4. a kind of electricity-leak-prevention water heater according to claim 1 is characterized in that: described damping isolation signals harvester (2) is 2, is connected to water inlet pipe (11), outlet pipe (12) on the described water heater liner (1).
5. a kind of electricity-leak-prevention water heater according to claim 1 is characterized in that: described insulation tube (21) adopts enhancing nylon insulating materials to make.
6. a kind of electricity-leak-prevention water heater according to claim 5 is characterized in that: the diameter of bore of described insulation tube (21) is 5mm, and length is 73mm; Or diameter of bore is 6mm, and length is 120mm.
7. a kind of electricity-leak-prevention water heater according to claim 1 is characterized in that: described earth leakage protective device comprises leakaging signal detecting circuit (a), signal control circuit (b), power circuit (c); Described leakaging signal detecting circuit (a) comprises first resistance R 1, the first electric leakage indicator lamp (L1), the 11 resistance R 11, the second electric leakage indicator lamp (L2), one end of described first resistance (R1) and described the 11 resistance (R11) is the input of the reference potential signal of inner bag (1), and the other end of the described first electric leakage indicator lamp (L1) and the second electric leakage indicator lamp (L2) is the input of the electric potential signal of described damping isolation signals harvester (2); The other end of described the 11 resistance (R11) is connected with an end of the second electric leakage indicator lamp (L2) and forms a leakage alarm (5), and described the 11 resistance (R11) other end is connected with an end of the described second electric leakage indicator lamp (L2).
8. a kind of electricity-leak-prevention water heater according to claim 7, it is characterized in that: described signal control circuit (b) comprises second resistance (R2), the 3rd resistance (R3), the 4th resistance (R4), second operational amplifier (IC2), the 5th resistance (R5), the 6th resistance (R6), the 7th resistance (R7), the 8th resistance (R8), the 3rd operational amplifier (IC3), the 9th resistance (R9), the tenth current potential (R10), buzzer (B), second triode (T2), relay (J), first triode (T1); One end of described second resistance (R2) is connected with positive supply+Vcc, the other end respectively with described the 3rd resistance (R3), one end of the 4th resistance (R4) is connected, the other end of described the 3rd resistance (R3) is connected with the anode of described second operational amplifier (IC2), the other end of described the 4th resistance (R4) is connected with earth electrode, the negative terminal of described second operational amplifier (IC2) is connected and is connected with an end of described the 5th resistance (R5), the other end of described the 5th resistance (R5) respectively with the 7th resistance (R7) end, the 3rd operational amplifier (IC3) anode is connected, the negative terminal of described the 3rd operational amplifier (IC3) is respectively with described the 6th resistance (R6) end and the 8th resistance (R8) end and connect, described the 6th resistance (R6) other end is connected with positive supply+Vcc, described the 8th resistance (R8) other end is connected with earth electrode, described the 7th resistance (R7) other end respectively with an end of the output of described the 3rd operational amplifier (IC3) and the 9th resistance (R9) mutually and connect, one end of described the tenth resistance (R10) is connected with the output of described the 3rd operational amplifier (IC3) and the other end of described the 7th resistance (R7), the other end of described the tenth resistance (R10) is connected with the base stage of described second triode (T2), the colelctor electrode of described second triode (T2) is connected with an end of described buzzer (B), and emitter stage is connected with described earth electrode; The other end of described buzzer (B) is connected with positive supply+Vcc, and the base stage of described triode (T1) is connected in the other end of described the 9th resistance (R9), and colelctor electrode is connected with an end of described relay (J), and emitter stage is connected with earth electrode.
9. a kind of electricity-leak-prevention water heater according to claim 8, it is characterized in that: described relay (J) inside comprises first contact (K1) and second contact (K2), described first contact (K1) is connected with power line (L1), the other end is connected with an end (L2) of electric heating tube, described second contact (K2) end is connected with power line (N1), and the other end is connected with the other end (N2) of electric heating tube.
10. a kind of electricity-leak-prevention water heater according to claim 1, it is characterized in that: between described inner bag (1) and the shell (3) insulated isolated device is installed, described insulated isolated device comprises that one is installed on the stator (6) on described inner bag (1) housing, described stator (6) be shaped as U-shaped, and form the U-shaped air strike between described inner bag (1) housing, have first through hole (61) on the described stator (6), corresponding respectively insulation inserts (7) and the insulation spacer (8) of being provided with on (6) two sides of described stator, and be mutually permanently connected, described insulation inserts (7) is provided with screwed hole (71), described insulation spacer (8) has second through hole (81), described screwed hole (71) is corresponding with described first through hole (61) respectively with second through hole (81), have third through-hole on described shell (3) body, be fixed with a body of wall fixture (31) that is installed on the metope on the described shell (3), have fourth hole on the described body of wall fixture (31), pass described fourth hole by a bolt (9) between described body of wall fixture (31) and described shell (3) and the inner bag (1), third through-hole, second through hole (81) is threaded fixing with first through hole (61) back with described screwed hole (71) mutually.
11. a kind of electricity-leak-prevention water heater according to claim 10, it is characterized in that: have two first through holes (61) on the described stator (6), corresponding with it, described insulation inserts (7) and insulation spacer (8) are respectively two, third through-hole on the described shell (3) also is two, and the fourth hole on the described body of wall fixture (31) also is two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201412625U CN201028758Y (en) | 2007-03-30 | 2007-03-30 | Anti-creep water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201412625U CN201028758Y (en) | 2007-03-30 | 2007-03-30 | Anti-creep water heater |
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| Publication Number | Publication Date |
|---|---|
| CN201028758Y true CN201028758Y (en) | 2008-02-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201412625U Expired - Lifetime CN201028758Y (en) | 2007-03-30 | 2007-03-30 | Anti-creep water heater |
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| CN (1) | CN201028758Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101275779B (en) * | 2007-03-30 | 2010-05-26 | 宁波帅康热水器有限公司 | Electricity-leakage-proof water heater |
| CN103528196A (en) * | 2013-10-24 | 2014-01-22 | 陈非 | Electric shock protection structure of electric water heater |
| CN108507186A (en) * | 2018-03-02 | 2018-09-07 | 青岛经济技术开发区海尔热水器有限公司 | Anti-creeping grounding structure, water pipe screw head with same and electric water heater |
| CN108870728A (en) * | 2018-03-02 | 2018-11-23 | 青岛经济技术开发区海尔热水器有限公司 | Electric water heater |
| CN109581141A (en) * | 2018-12-14 | 2019-04-05 | 青岛经济技术开发区海尔热水器有限公司 | Electric leakage detection method of electric water heater and electric water heater |
| CN111765649A (en) * | 2020-07-14 | 2020-10-13 | 广东格美淇电器有限公司 | Electric water heater with voltage induction type leakage protection and alarm method thereof |
-
2007
- 2007-03-30 CN CNU2007201412625U patent/CN201028758Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101275779B (en) * | 2007-03-30 | 2010-05-26 | 宁波帅康热水器有限公司 | Electricity-leakage-proof water heater |
| CN103528196A (en) * | 2013-10-24 | 2014-01-22 | 陈非 | Electric shock protection structure of electric water heater |
| CN103528196B (en) * | 2013-10-24 | 2016-05-18 | 陈非 | Electric shock protection structure of electric water heater |
| CN108507186A (en) * | 2018-03-02 | 2018-09-07 | 青岛经济技术开发区海尔热水器有限公司 | Anti-creeping grounding structure, water pipe screw head with same and electric water heater |
| CN108870728A (en) * | 2018-03-02 | 2018-11-23 | 青岛经济技术开发区海尔热水器有限公司 | Electric water heater |
| CN109581141A (en) * | 2018-12-14 | 2019-04-05 | 青岛经济技术开发区海尔热水器有限公司 | Electric leakage detection method of electric water heater and electric water heater |
| CN111765649A (en) * | 2020-07-14 | 2020-10-13 | 广东格美淇电器有限公司 | Electric water heater with voltage induction type leakage protection and alarm method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20080227 Effective date of abandoning: 20070330 |