CN104753030A - Anti-electric shock protection system of electric water heater - Google Patents
Anti-electric shock protection system of electric water heater Download PDFInfo
- Publication number
- CN104753030A CN104753030A CN201510090300.8A CN201510090300A CN104753030A CN 104753030 A CN104753030 A CN 104753030A CN 201510090300 A CN201510090300 A CN 201510090300A CN 104753030 A CN104753030 A CN 104753030A
- Authority
- CN
- China
- Prior art keywords
- relay
- main control
- electrocution
- electric heater
- proof protection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract description 11
- 230000003287 optical effect Effects 0.000 claims abstract description 15
- 206010014405 Electrocution Diseases 0.000 claims description 26
- 238000005485 electric heating Methods 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 3
- 206010014357 Electric shock Diseases 0.000 description 9
- 230000002950 deficient Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Control Of Resistance Heating (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses an anti-electric shock protection system of an electric water heater. The anti-electric shock protection system of the electric water heater comprises an anti-electric shock protection power supply detection circuit, the anti-electric shock protection power supply detection circuit is provided with a first relay, a second relay, a third relay and an optical coupler, the second relay is a normally closed relay, and the first relay and third relay are normally open relays. The anti-electric shock protection system is capable of avoiding an electric shock accident when the grounding wire of the electric water heater is poorly connected with the ground or not connected with the ground, the harm to the life and property loss due to the electric shock accident are avoided, and the social benefit and economic benefit are good.
Description
Technical field
The present invention relates to electric heater technical field, particularly relate to a kind of electrocution-proof protection system of electric heater.
Background technology
Electric heater, as a kind of household appliances, enjoys the favor of people in recent years.Electric heater belongs to I electric appliances, is necessary for it and arranges a special protection ground wire during installation.In the three pole supply sockets of user, have good earth connection and plug and female contact are good when, electric heater use be very safe.But according to market survey, do not have good earth connection at present on China has many consumers the supply socket of installing, ground wire is used as by some running water pipe, and some is in vacant state, on some zero line even the ground wire pole of socket being connected to power supply or live wire.Like this, user just also exists when using electric heater the hidden danger be absolutely unsafe.Particularly the earth polar of supply socket is attempted by live wire, and at this moment the shell of electric heater is just directly charged, and user just has the danger of direct electric shock.Also have the ground wire pole of supply socket and be also absolutely unsafe being connected on zero line, just in case by live wire and zero line exchange during outdoor electricity distribution line maintenance, so the shell of electric heater is also just directly charged.If moreover do not press standard-required wiring during water heater wiring, by ground wire and zero line misconnection, ground wire and live wire misconnection, all can cause Danger Electric shock risk.
Whether the most frequently used electrocution-proof protection mode of existing electric heater uses zero-sequence transformer to leak electricity to detect electric heater; this mode is also could effectively realize electric water heater leakage protection function under the ground wire grounded reliable prerequisite of electric heater; if electric heater ground wire can not reliably ground connection; or electric heater and earth connection loose contact; this detection mode will lose efficacy, thus can not play creepage protection function.
Summary of the invention
For overcoming the deficiencies in the prior art, the object of the present invention is to provide a kind of electrocution-proof protection system of electric heater.
The present invention is the technical scheme solving the employing of its technical problem:
A kind of electrocution-proof protection system of electric heater, comprise electrocution-proof protection power sense circuit, described electrocution-proof protection power sense circuit is provided with relay one, relay two, relay three, optical coupler, its repeat circuit two is closed type relay, and relay one, relay three are normal-open type relay; The coil of described relay one, relay two, relay three is connected with a main control module respectively, exports control power supply signal by described main control module to relay one, relay two, relay three; The contact A of described relay one is connected with power firestreak, and contact B is connected with electric heating tube load; The contact A of described relay two is connected with power ground, and contact B is connected with electric heater ladle body earth point; The contact A of described relay three is connected with the contact B of relay two, and contact B is connected to the positive pole of light-emitting diode in optical coupler; In described optical coupler, the negative pole of light-emitting diode is connected with zero-power line, and the collector electrode of phototriode is connected with the input of main control module, the grounded emitter of phototriode.
Described electrocution-proof protection power sense circuit is also provided with Kick type temperature switch, and described Kick type temperature switch is connected on the circuit between electric heating tube load and power firestreak.
The present invention also comprises the metal hanging rack for electric heater being hung on wall, and described metal hanging rack is connected with the earth.
Further, described main control module comprises main control chip and peripheral circuit thereof.
Further, described main control module is also provided with display module, and described display module is connected with the output of main control chip.
Further, described main control module is also provided with the buzzer for leakage-current alarm, and described buzzer is connected with the output of main control chip.
Further, described main control chip adopts singlechip chip.
The invention has the beneficial effects as follows: the electrocution-proof protection system of a kind of electric heater that the present invention adopts; can under electric heater ground connection defective mode or under unearthed state; realize the generation avoiding electric shock accidents; electric shock accidents is avoided to cause life to injure and property loss, the economic results in society produced.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and example, the invention will be further described.
Fig. 1 is the circuit theory diagrams of electrocution-proof protection power sense circuit of the present invention;
Fig. 2 is the circuit theory diagrams of main control module of the present invention.
Embodiment
See figures.1.and.2, the electrocution-proof protection system of a kind of electric heater of the present invention, comprise electrocution-proof protection power sense circuit, described electrocution-proof protection power sense circuit is provided with relay one RELAY1, relay two RELAY2, relay three RELAY3, optical coupler U2, its repeat circuit two RELAY2 is closed type relay, and relay one RELAY1, relay three RELAY3 are normal-open type relay; The coil of described relay one RELAY1, relay two RELAY2, relay three RELAY3 is connected with a main control module respectively, is exported by described main control module and controls power supply signal to relay one RELAY1, relay two RELAY2, relay three RELAY3; The contact A of described relay one RELAY1 is connected with power firestreak L, and contact B is connected with electric heating tube load 1; The contact A of described relay two RELAY2 is connected with power ground G, and contact B is connected with electric heater ladle body earth point 2; The contact A of described relay three RELAY3 is connected with the contact B of relay two RELAY2, and contact B is connected to the positive pole (i.e. pin one) of light-emitting diode in optical coupler U2; In described optical coupler U2, the negative pole (i.e. pin two) of light-emitting diode is connected with zero-power line N, and the collector electrode (i.e. pin four) of phototriode is connected with the input of main control module, emitter (the i.e. pin three) ground connection of phototriode.
In the present embodiment, described main control module comprises main control chip 3 and peripheral circuit thereof, and relay one RELAY1, relay two RELAY2, relay three RELAY3 are connected with the output of main control chip 3 respectively.
Described main control module is also provided with display module and the buzzer 4 for leakage-current alarm, and described display module, buzzer 4 are connected with the output of main control chip 3 respectively.
When electric heater switches on power, main control chip 3 exports and controls power supply signal to relay one RELAY1, relay two RELAY2, relay three RELAY3, make it Chang Kaiduan B and normal-closed end A is in on-state, if now electric heater ground wire electric leakage and charged time, by above-mentioned connected mode, optical coupler U2 pin four output low level, main control chip 3 detects that this low level signal exports control signal at once and drives relay one RELAY1, relay two RELAY2, relay three RELAY3 disconnects, cut off load electrothermal tube power to be connected with the ground wire cutting off ladle body, and send sound and light alarm, thus realize the generation avoiding electric shock accidents.
When the live wire L of input power and zero line N connects inverse time, because casing of electric water heater is connected to ground wire G, according to above-mentioned connected mode, potential difference can be produced at optical coupler U2 pin one and pin two and drive optical coupler U2 pin four output low level, cut off electric heating tube load 1 with above-mentioned operation principle and ground wire connects, avoid anti-electric shock accidents occurring because the live wire L of power supply and zero line N connects.
Described electrocution-proof protection power sense circuit is also provided with Kick type temperature switch S1, and described Kick type temperature switch S1 is connected on the circuit between electric heating tube load 1 and power firestreak.When electric heater is heated and occurred abnormal conditions, Kick type temperature switch 1, by tripping power-off, is conducive to protecting the inner bag water temperature of electric heater to be no more than the highest safe water temperature.
This electrocution-proof protection system also comprises the metal hanging rack for electric heater being hung on wall, and described metal hanging rack is connected with the earth.When the live wire L of input power and zero line N connect anti-or electric heater earth connection lost efficacy when, because electric heater mounting means hangs on wall, electric heater is connected with the earth by metal hanging rack, by above-mentioned connected mode, optical coupler U3 pin one and pin two can produce potential difference, thus drive optical coupler U2 pin four output low level, with above-mentioned operation principle, cut off load electrothermal tube power and ground wire to connect, reach and avoid because the live wire L of power supply and zero line N connects the anti-object that electric shock accidents occurs.
Electric heater generation electric leakage accident, is mainly electrothermal tube defective insulation or the water conduction of electrothermal tube booster in inner bag is caused and the electric leakage of Kick type temperature switch causes.Under electric heater ground connection defective mode, existing employing zero-sequence transformer electric leakage protection technology will lose efficacy, and not have the effect of electrocution-proof protection.China region is wide, and particularly the family of rural area also exists the situation of a large amount of unearthed lines of use electric line, and some families exist ground wire grounded insecure situation, and these national conditions determine Electrical Safety and exist uncertain.Native system under electric heater ground connection defective mode or in unearthed situation, can avoid the generation of electric shock accidents, avoids electric shock accidents to cause life to injure and property loss, produces good economic results in society.
The above, just preferred embodiment of the present invention, the present invention is not limited to above-mentioned execution mode, as long as it reaches technique effect of the present invention with identical means, all should belong to protection scope of the present invention.
Claims (7)
1. the electrocution-proof protection system of an electric heater, it is characterized in that: comprise electrocution-proof protection power sense circuit, described electrocution-proof protection power sense circuit is provided with relay one (RELAY1), relay two (RELAY2), relay three (RELAY3), optical coupler (U2), its repeat circuit two (RELAY2) is closed type relay, and relay one (RELAY1), relay three (RELAY3) are normal-open type relay; The coil of described relay one (RELAY1), relay two (RELAY2), relay three (RELAY3) is connected with a main control module respectively, is exported by described main control module and controls power supply signal to relay one (RELAY1), relay two (RELAY2), relay three (RELAY3);
The contact A of described relay one (RELAY1) is connected with power firestreak (L), and contact B is connected with electric heating tube load (1);
The contact A of described relay two (RELAY2) is connected with power ground (G), and contact B is connected with electric heater ladle body earth point (2);
The contact A of described relay three (RELAY3) is connected with the contact B of relay two (RELAY2), and contact B is connected to the positive pole of light-emitting diode in optical coupler (U2);
In described optical coupler (U2), the negative pole of light-emitting diode is connected with zero-power line (N), and the collector electrode of phototriode is connected with the input of main control module, the grounded emitter of phototriode.
2. the electrocution-proof protection system of a kind of electric heater according to claim 1; it is characterized in that: described electrocution-proof protection power sense circuit is also provided with Kick type temperature switch (S1), described Kick type temperature switch (S1) is connected on the circuit between electric heating tube load (1) and power firestreak.
3. the electrocution-proof protection system of a kind of electric heater according to claim 1, is characterized in that: also comprise the metal hanging rack for electric heater being hung on wall, and described metal hanging rack is connected with the earth.
4. the electrocution-proof protection system of a kind of electric heater according to claim 1, is characterized in that: described main control module comprises main control chip (3) and peripheral circuit thereof.
5. the electrocution-proof protection system of a kind of electric heater according to claim 4, it is characterized in that: described main control module is also provided with display module, described display module is connected with the output of main control chip.
6. the electrocution-proof protection system of a kind of electric heater according to claim 4, is characterized in that: described main control module is also provided with the buzzer (4) for leakage-current alarm, and described buzzer (4) is connected with the output of main control chip (3).
7. according to the electrocution-proof protection system of the arbitrary described a kind of electric heater of claim 4-6, it is characterized in that: described main control chip (3) adopts singlechip chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510090300.8A CN104753030B (en) | 2015-02-27 | 2015-02-27 | A kind of electrocution-proof protection system of electric heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510090300.8A CN104753030B (en) | 2015-02-27 | 2015-02-27 | A kind of electrocution-proof protection system of electric heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104753030A true CN104753030A (en) | 2015-07-01 |
| CN104753030B CN104753030B (en) | 2018-05-22 |
Family
ID=53592310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510090300.8A Active CN104753030B (en) | 2015-02-27 | 2015-02-27 | A kind of electrocution-proof protection system of electric heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104753030B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113938554A (en) * | 2021-09-27 | 2022-01-14 | 深圳创维智能厨电有限公司 | High-safety electric water heater with intelligent voice interaction function |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2637986Y (en) * | 2003-01-31 | 2004-09-01 | 谭启仁 | Human body safety protection device of electric water heater charged ground lead |
| WO2009113570A1 (en) * | 2008-03-13 | 2009-09-17 | ダイキン工業株式会社 | Overvoltage protection circuit and power supply system |
| CN201393050Y (en) * | 2009-04-09 | 2010-01-27 | 贾翱东 | Anti-electric shock device of household appliance |
| CN201556927U (en) * | 2009-11-20 | 2010-08-18 | 佛山市顺德区和而泰电子科技有限公司 | Electric leakage detection protecting circuit and electric leakage detection protector |
| CN103311885A (en) * | 2012-03-06 | 2013-09-18 | 海尔集团公司 | Electric leakage protection device |
| CN203456846U (en) * | 2013-09-02 | 2014-02-26 | 芜湖美的厨卫电器制造有限公司 | Water heater and earth wire detection device for water heater |
| CN204424871U (en) * | 2015-02-27 | 2015-06-24 | 张正怡 | A kind of electrocution-proof protection system of electric heater |
-
2015
- 2015-02-27 CN CN201510090300.8A patent/CN104753030B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2637986Y (en) * | 2003-01-31 | 2004-09-01 | 谭启仁 | Human body safety protection device of electric water heater charged ground lead |
| WO2009113570A1 (en) * | 2008-03-13 | 2009-09-17 | ダイキン工業株式会社 | Overvoltage protection circuit and power supply system |
| CN201393050Y (en) * | 2009-04-09 | 2010-01-27 | 贾翱东 | Anti-electric shock device of household appliance |
| CN201556927U (en) * | 2009-11-20 | 2010-08-18 | 佛山市顺德区和而泰电子科技有限公司 | Electric leakage detection protecting circuit and electric leakage detection protector |
| CN103311885A (en) * | 2012-03-06 | 2013-09-18 | 海尔集团公司 | Electric leakage protection device |
| CN203456846U (en) * | 2013-09-02 | 2014-02-26 | 芜湖美的厨卫电器制造有限公司 | Water heater and earth wire detection device for water heater |
| CN204424871U (en) * | 2015-02-27 | 2015-06-24 | 张正怡 | A kind of electrocution-proof protection system of electric heater |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113938554A (en) * | 2021-09-27 | 2022-01-14 | 深圳创维智能厨电有限公司 | High-safety electric water heater with intelligent voice interaction function |
| CN113938554B (en) * | 2021-09-27 | 2023-04-28 | 深圳创维智能厨电有限公司 | High security electric water heater with intelligent voice interaction function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104753030B (en) | 2018-05-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101419265B (en) | Signal generating circuit for detecting protective earthing connecting status | |
| CN102927690A (en) | Water heater and electric leakage and dry burning prevention detection method thereof | |
| CN204167871U (en) | A kind of Aftercurrent protection circuit breaker | |
| CN100561814C (en) | Protecting circuit for electrical equipment | |
| CN202434818U (en) | Power socket with electric leakage alarming function | |
| CN201725987U (en) | Leakage protection socket with sound and light alarm | |
| CN201717602U (en) | Noise-proof type anti-electric touch and anti-overheating protector of electric water heater | |
| CN204424871U (en) | A kind of electrocution-proof protection system of electric heater | |
| CN108400571A (en) | A kind of earth leakage protective device of leakage-current alarm | |
| CN104753030A (en) | Anti-electric shock protection system of electric water heater | |
| CN105259516B (en) | A kind of off-line UPS input switch abnormal detector | |
| CN101782275B (en) | Noise-type electric shock preventing and dry burning protecting device of electric water heater | |
| CN204012014U (en) | A kind of socket of new structure | |
| CN206076642U (en) | A kind of safe leakage protecting plug that all can be detected | |
| CN204794013U (en) | Earth -leakage protector control circuit | |
| CN206148921U (en) | Power source detection circuit and electronic product | |
| CN204179401U (en) | A kind of insert row with alarm and protection function | |
| CN203617501U (en) | Special touch control type high-power power supply system for kitchen | |
| CN201044351Y (en) | Device capable of alarming when abnormal voltage happens in grounding system | |
| CN210486118U (en) | Safety device capable of timing, energy-saving and anti-creeping | |
| CN207922583U (en) | Single-phase electric water-boiling device final stage control protective unit | |
| CN106410743A (en) | Power supply detection circuit and electronic product | |
| CN201490483U (en) | Surge proof protective socket | |
| CN202206133U (en) | Lightning protection isolator for indoor signal line and power socket with same | |
| CN2652004Y (en) | Automatic leakage and cut-off protector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20180411 Address after: 528305 Foshan, Shunde, Guangdong province Ronggui Rong Li neighborhood committee Changfu West Road 3, 8 of Tianfu Lai international industrial city 403. Applicant after: Shunde Foshan early morning Electric Appliance Co., Ltd. Address before: 528303 Guangdong Province, Foshan city Shunde District Ronggui Hongxing Road No. 6 Wen Xing Ying vigor ranks 6 402 Applicant before: Zhang Zhengyi |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |