CN202442503U - Protection device of electric water heater - Google Patents
Protection device of electric water heater Download PDFInfo
- Publication number
- CN202442503U CN202442503U CN2012200281251U CN201220028125U CN202442503U CN 202442503 U CN202442503 U CN 202442503U CN 2012200281251 U CN2012200281251 U CN 2012200281251U CN 201220028125 U CN201220028125 U CN 201220028125U CN 202442503 U CN202442503 U CN 202442503U
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- circuit
- water heater
- protection device
- electric water
- electric heater
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Abstract
The utility model provides a protection device of an electric water heater and belongs to the field of the electric water heater. The protection device comprises the electric water heater and is composed of a voltage-reducing circuit, a voltage-stabilizing circuit, a leakage detection circuit and an anti-drying circuit, wherein the voltage-reducing circuit, the voltage-stabilizing circuit, the leakage detection circuit and the anti-drying circuit are connected through a lead wire; and all elements are mounted on the electric water heater. The protection device takes a resistor, a silicon rectifier diode, unidirectional controlled silicon, a light-emitting diode, a photoelectric coupler and a relay as the leakage detection circuit; the protection device takes a resistor, a reed switch, a small magnet, a trimmer potentiometer, an NPN (Negative-Positive-Negative) triode, a PNP (Positive-Negative-Positive) triode, a light-emitting diode and a relay as the anti-drying circuit; and therefore, the protection device automatically switches off a heating pipe power supply of the electric water heater when the electric water heater leaks electricity or no water exists in the electric water heater, and the light-emitting diode is lightened to remind a user. The protection device has leakage detection and anti-drying functions so that the protection device has a better protection effect on the electric water heater and the user; and therefore, the protection device has a good application prospect.
Description
Technical field
The utility model relates to the safety guard of electric heater; Especially a kind of when can not have the dry combustion method of water heating tube in electric heater electric leakage and electric heater inside, heating tube power supply and the electric heater protective device of lighting light emitting diode prompting user that can the automatic disconnection electric heater.
Background technology
At present, known electric heater protective device, it can not effectively break off the heating tube power supply of electric heater when electric heater electric leakage and the heating tube dry combustion method of electric heater inside, can't remind the user through lighting light emitting diode intuitively.
The utility model content
The purpose of the utility model is to overcome existing electric heater protective device; It is when electric heater electric leakage and the heating tube dry combustion method of electric heater inside; Can not effectively break off the heating tube power supply of electric heater; Can't remind the user through lighting light emitting diode intuitively; Providing a kind of can effectively break off the heating tube power supply of electric heater when electric heater electric leakage and the dry combustion method of electric heater heating tube, and reminds user's electric heater protective device through lighting light emitting diode intuitively.
The purpose of the utility model is achieved in that
The electric heater protective device comprises electric heater, it is characterized in that being made up of reduction voltage circuit, mu balanced circuit, electric-leakage detection circuit and anti-dry circuit, connects through lead therebetween, and all elements are installed on the electric heater.
Described reduction voltage circuit is made up of a power transformer, four silicon rectifier diodes and an electrochemical capacitor, connects through lead therebetween.
Described mu balanced circuit is made up of the fixing output of one three end voltage-stablizer, two ceramic disc capacitors and a power switch, connects through lead therebetween.
Described electric-leakage detection circuit is made up of three resistance, a silicon rectifier diode, an one-way SCR, a light emitting diode, a photoelectrical coupler and a relay, connects through lead therebetween.
Described anti-dry circuit is made up of three resistance, a tongue tube, a small magnet, a trimmer potentiometer, a NPN triode, a PNP triode, a light emitting diode and a relay; Connect through lead between three resistance, a tongue tube, a trimmer potentiometer, a NPN triode, a PNP triode, a light emitting diode and a relay; The small magnet sealing is installed in the plastic casing, and is installed in the electric heater internal upper part to plastic casing through bolt and nut.
The utility model utilizes resistance, silicon rectifier diode, one-way SCR, light emitting diode, photoelectrical coupler and relay as electric-leakage detection circuit; Also utilize resistance, tongue tube, small magnet, trimmer potentiometer, NPN triode, PNP triode, light emitting diode and relay as the anti-dry circuit; Like this, the utility model just can be when electric heater electric leakage or electric heater inside have water, heating tube power supply that can the automatic disconnection electric heater, and light light emitting diode and remind the user.Owing to the utlity model has the function of detection of electrical leakage and anti-dry, the protective effect that can play electric heater and user is so have the application prospect of getting well.
Description of drawings
Fig. 1 is the utility model structured flowchart; Fig. 2 is the circuit diagram of the utility model; Fig. 3 is that the tongue tube and the small magnet of the utility model anti-dry circuit is installed in the sketch map on the electric heater.
The specific embodiment
Shown in Fig. 1, the electric heater protective device comprises electric heater, is made up of reduction voltage circuit, mu balanced circuit, electric-leakage detection circuit and anti-dry circuit, connects through lead therebetween, and all elements are installed on the electric heater.Reduction voltage circuit is made up of a power transformer, four silicon rectifier diodes and an electrochemical capacitor, connects through lead therebetween.Mu balanced circuit is made up of the fixing output of one three end voltage-stablizer, two ceramic disc capacitors and a power switch, connects through lead therebetween.Electric-leakage detection circuit is made up of three resistance, a silicon rectifier diode, an one-way SCR, a light emitting diode, a photoelectrical coupler and a relay, connects through lead therebetween.The anti-dry circuit is made up of three resistance, a tongue tube, a small magnet, a trimmer potentiometer, a NPN triode, a PNP triode, a light emitting diode and a relay; Connect through lead between three resistance, a tongue tube, a trimmer potentiometer, a NPN triode, a PNP triode, a light emitting diode and a relay; The small magnet sealing is installed in the plastic casing, and is installed in the electric heater internal upper part to plastic casing through bolt and nut.
Shown in Fig. 2, by power transformer T, silicon rectifier diode VD1, VD2, VD3, VD4 and electrochemical capacitor C1 form reduction voltage circuit.By the fixing output of three ends voltage-stablizer A1, ceramic disc capacitor C2, C3 and power switch S form mu balanced circuit.By resistance R 1, R2, R3, silicon rectifier diode VD5, one-way SCR VS, light emitting diode VL1, photoelectrical coupler A2 and relay K 1 are formed electric-leakage detection circuit.By resistance R 4, R5, R6, tongue tube E, small magnet CT, trimmer potentiometer RP, NPN triode VT1, PNP triode VT2, light emitting diode VL2 and relay K 2 are formed the anti-dry circuit.RL is the inner heating tube of electric heater.After the 220V AC power was connected, RL promptly got the inner water of electrical heating electric heater.Behind 220V AC power input T, reduce to the 12V AC power, through VD1, VD2, VD3, VD4 rectification, C1 filtering converts dc source to.After dc source gets into A1, under the effect of A1, from the stable 6V dc source of the 3rd pin output of A1; The effect of C2 is the ripple characteristics that improves power supply, and the effect of C3 is a transient response of improving load.In using, during the RL electric leakage, leakage current will be from the shell of RL through R1; 1,2 pin of A2; And VD5 and 220V AC power zero line N formation loop, the inner luminous tube of A2 is lighted, so the inner corresponding photosensitive tube of A2 transfers conducting state to by original cut-off state; VS obtains the trigger current conducting, and the K1 that continues gets its normally-closed contact of electric adhesive and breaks off.After VS obtained the trigger current conducting, power supply can be lighted VL1 through the R3 current limliting and remind user RL electric leakage.Because the 220V AC power live wire L feeder ear of RL is to link to each other with the normally-closed contact of K1, so after K1 got its normally-closed contact disconnection of electric adhesive, RL also can dead electricity quit work.In the use, if when the water heater internal water is enough, the CT nearly E of suspension joint that will under the buoyancy of plastic casing, make progress, the inner contact of E will be connected; Thereby E is with the emitter stage short circuit of VT1, and VT1 ends, and subsequent conditioning circuit just can not worked yet.When the water heater internal water was not enough, CT will move downward and leave E, so the inner contact of E will be broken off; After the inner contact of E was broken off, VT1, VT2 obtained suitable bias current conducting, and the K2 that continues gets its normally-closed contact of electric adhesive and breaks off.After VT1, VT2 obtained suitable bias current conducting, power supply can be lighted VL2 through the R6 current limliting and remind user's water heater internal water not much of that.Because the 220V AC power live wire L feeder ear of RL is to link to each other with the normally-closed contact of K2, so after K2 got its normally-closed contact disconnection of electric adhesive, RL also can dead electricity quit work.In Fig. 2, T adopts 220V/12V, 3W power transformer.VD1, VD2, VD3, VD4 model are 1N4001, and the VD5 model is 1N4004.The C1 model is 470UF, 25V, and the C2 model is 0.33UF, and the C3 model is 0.1F.The VT1 model is 9014, and the VT2 model is 9012.The R1 resistance is 100K, and the R2 resistance is 1K, and the R3 resistance is 220 Ω, and the R4 resistance is 330K, and the R5 resistance is 10K, and the R6 resistance is 220 Ω.The RP specification is 330K.VL1, VL2 are the emitting red light diodes.VS is MCR100-1 one-way SCR.The A1 model is 7806, and A2 is a 4N25 type photoelectrical coupler.E is JAG-3 a type normally opened contact tongue tube.S stirs power switch for a short time.K1, K2 are JZC-22FY type 6V relays.
In Fig. 3, the 1st, electric heater; The 2nd, the small magnet of anti-dry circuit; The 3rd, the plastic casing of installation small magnet 2; The 4th, the screw rod of plastic casing 3 is installed, plastic casing 3 is installed in the internal upper part of electric heater 1 through screw rod 4, after plastic casing 3 installs, can move up and down along screw rod 4; The tongue tube of 5 anti-dry circuit.When electric heater 1 internal water was enough, the plastic casing 3 that small magnet 2 is installed moved upward near tongue tube 5 under the buoyancy of water effect, thereby tongue tube 5 inner contact are connected; When electric heater 1 internal water was not enough, the plastic casing 3 that small magnet 2 is installed will move downward and leave tongue tube 5, thereby tongue tube 5 inner contact are broken off.
Claims (1)
1. the electric heater protective device comprises electric heater, it is characterized in that being made up of reduction voltage circuit, mu balanced circuit, electric-leakage detection circuit and anti-dry circuit, connects through lead therebetween, and all elements are installed on the electric heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200281251U CN202442503U (en) | 2012-01-25 | 2012-01-25 | Protection device of electric water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200281251U CN202442503U (en) | 2012-01-25 | 2012-01-25 | Protection device of electric water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202442503U true CN202442503U (en) | 2012-09-19 |
Family
ID=46823951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200281251U Expired - Fee Related CN202442503U (en) | 2012-01-25 | 2012-01-25 | Protection device of electric water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202442503U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105406443A (en) * | 2015-11-11 | 2016-03-16 | 无锡联力电子科技股份有限公司 | Instantaneous electric water heater dry heating prevention detection protection circuit |
| CN106954288A (en) * | 2017-05-16 | 2017-07-14 | 叶人龙 | Intelligent safety electric heating tube of kettle |
-
2012
- 2012-01-25 CN CN2012200281251U patent/CN202442503U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105406443A (en) * | 2015-11-11 | 2016-03-16 | 无锡联力电子科技股份有限公司 | Instantaneous electric water heater dry heating prevention detection protection circuit |
| CN105406443B (en) * | 2015-11-11 | 2018-02-06 | 无锡联力电子科技股份有限公司 | Instant-heating electric water heater anti-dry detects protection circuit |
| CN106954288A (en) * | 2017-05-16 | 2017-07-14 | 叶人龙 | Intelligent safety electric heating tube of kettle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120919 Termination date: 20140125 |