CN104753030B - A kind of electrocution-proof protection system of electric heater - Google Patents
A kind of electrocution-proof protection system of electric heater Download PDFInfo
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- CN104753030B CN104753030B CN201510090300.8A CN201510090300A CN104753030B CN 104753030 B CN104753030 B CN 104753030B CN 201510090300 A CN201510090300 A CN 201510090300A CN 104753030 B CN104753030 B CN 104753030B
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- electric heater
- proof protection
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Abstract
A kind of electrocution-proof protection system for electric heater that the present invention uses; including electrocution-proof protection power sense circuit; the electrocution-proof protection power sense circuit is provided with relay one, relay two, relay three, photo-coupler; its repeat circuit two is closed type relay, and relay one, relay three are normal-open type relay.The present invention can realize the generation for avoiding electric shock accidents under electric heater ground connection defective mode or under unearthed state, and electric shock accidents is avoided to cause life injury and property loss, the economic results in society generated.
Description
Technical field
The present invention relates to electric heater technical field, more particularly to a kind of electrocution-proof protection system of electric heater.
Background technology
Electric heater receives the favor of people in recent years as a kind of household appliances.Electric heater belongs to I electric appliances, installation
When be necessary for it set a dedicated protection ground wire.When having good ground wire and plug in the three pole power outlets of user
In the case of being good again with female contact, it is very safe that electric heater, which uses,.But according to market survey, at present in China
Have many consumers installation power outlet on there is no good ground wire, for some running water pipes as ground wire, some are in outstanding
Dummy status, the ground wire pole of socket is even connected on the zero curve or firewire of power supply by some.Since so, user is using electric heating
It there is the hidden danger being absolutely unsafe during hydrophone.The earth polar of particularly power outlet is attempted by firewire, at this moment electric heater
Shell is just directly charged, and user just has the danger of direct electric shock.Also the ground wire pole of power outlet and on zero curve is connected on be also
It is absolutely unsafe, just in case exchange firewire and zero curve during outdoor electricity distribution line maintenance, then the shell of electric heater is also just direct
It is charged.Moreover if not by standard requirement wiring during water heater wiring, by ground wire and zero curve misconnection, ground wire and firewire misconnection,
Danger Electric shock risk will be caused.
The existing most common electrocution-proof protection mode of electric heater is to be to detect electric heater using zero sequence transformer
No electric leakage, this mode are also that could effectively realize electric water heater leakage protection under the premise of electric heater is ground wire grounded reliably
Function, if electric heater ground wire cannot reliably grounded or electric heater and ground wire loose contact, this detection mode will
Failure, so as to which creepage protection function cannot be played.
The content of the invention
For overcome the deficiencies in the prior art, it is an object of the invention to provide a kind of electrocution-proof protection systems of electric heater
System.
The present invention for solve its technical problem the technical solution adopted is that：
A kind of electrocution-proof protection system of electric heater, including electrocution-proof protection power sense circuit, the protection against electric shock is protected
Shield power sense circuit is provided with relay one, relay two, relay three, photo-coupler, and repeat circuit two is closed type
Relay, relay one, relay three are normal-open type relay；The relay one, relay two, the coil point of relay three
It is not connected with a main control module, control power supply letter is exported from the main control module to relay one, relay two, relay three
Number；The contact A of the relay one is connected with power firestreak, and contact B is connected with electric heating tube load；The relay two touches
Point A is connected with power ground, and contact B is connected with electric heater ladle body earth point；The contact A of the relay three and relay two
Contact B connections, contact B is connected to the anode of light emitting diode in photo-coupler；Light emitting diode in the photo-coupler
Cathode is connected with zero-power line, and the collector of phototriode and the input terminal of main control module connect, the transmitting of phototriode
Pole is grounded.
The electrocution-proof protection power sense circuit is additionally provided with Kick type temperature switch, and the Kick type temperature switch connects
It is connected on the circuit between electric heating tube load and power firestreak.
Present invention additionally comprises for electric heater to be hung on to the metal hanging rack of wall, the metal hanging rack connects with the earth
It connects.
Further, the main control module includes main control chip and its peripheral circuit.
Further, the main control module is additionally provided with the output terminal company of display module, the display module and main control chip
It connects.
Further, the main control module is additionally provided with the buzzer for leakage-current alarm, the buzzer and main control chip
Output terminal connection.
Further, the main control chip uses singlechip chip.
The beneficial effects of the invention are as follows：A kind of electrocution-proof protection system for electric heater that the present invention uses, can be in electric heating
Under hydrophone ground connection defective mode or under unearthed state, realize the generation for avoiding electric shock accidents, electric shock accidents is avoided to lead
Cause life injury and property loss, the economic results in society generated.
Description of the drawings
Below in conjunction with attached drawing and example, the invention will be further described.
Fig. 1 is the circuit diagram of the electrocution-proof protection power sense circuit of the present invention；
Fig. 2 is the circuit diagram of the main control module of the present invention.
Specific embodiment
Referring to Figures 1 and 2, the electrocution-proof protection system of a kind of electric heater of the invention, including electrocution-proof protection power supply
Detection circuit, the electrocution-proof protection power sense circuit are provided with one RELAY1 of relay, two RELAY2 of relay, relay
Three RELAY3, photo-coupler U2, two RELAY2 of repeat circuit be closed type relay, one RELAY1 of relay, relay three
RELAY3 is normal-open type relay；One RELAY1 of relay, two RELAY2 of relay, the coil point of three RELAY3 of relay
It is not connected with a main control module, from the main control module to one RELAY1 of relay, two RELAY2 of relay, relay three
RELAY3 output control power supply signals；The contact A of one RELAY1 of relay is connected with power firestreak L, and contact B generates heat with electricity
1 connection of pipe load；The contact A of two RELAY2 of relay is connected with power ground G, and contact B is grounded with electric heater ladle body
2 connection of point；The contact A of three RELAY3 of relay is connected with the contact B of two RELAY2 of relay, and contact B is connected to optocoupler
The anode of light emitting diode in clutch U2（That is pin one）；The cathode of light emitting diode in the photo-coupler U2（That is pin two）
It is connected with zero-power line N, the collector of phototriode（That is pin four）It is connected with the input terminal of main control module, phototriode
Emitter（That is pin three）Ground connection.
In the present embodiment, the main control module includes main control chip 3 and its peripheral circuit, one RELAY1 of relay, relay
The output terminal of two RELAY2 of device, three RELAY3 of relay respectively with main control chip 3 is connected.
The main control module is additionally provided with display module and the buzzer 4 for leakage-current alarm, the display module, bee
Output terminal of the device 4 respectively with main control chip 3 that ring is connected.
When electric heater powers on, the output of main control chip 3 control power supply signal to one RELAY1 of relay, relay two
RELAY2, three RELAY3 of relay, are allowed to normally open end B and normal-closed end A in an ON state, if electric heater ground wire leaks electricity at this time
When i.e. charged, by above-mentioned connection mode, photo-coupler U2 pins four export low level, and main control chip 3 detects that this low level is believed
It exports one RELAY1 of control signal driving relay, two RELAY2 of relay, three RELAY3 of relay number at once to disconnect, cut-out is negative
It carries electrothermal tube power and is connected with the ground wire for cutting off ladle body, and send sound-light alarm, so as to fulfill the generation of electric shock accidents is avoided.
As the firewire L of input power and zero curve N reversed, because casing of electric water heater is connected to ground wire G, according to above-mentioned connection side
Formula can generate potential difference driving photo-coupler U2 pins four in photo-coupler U2 pins one and pin two and export low level, ibid
Operation principle cut-out electric heating tube load 1 and ground wire connection are stated, avoids that electric shock thing occurs because the firewire L and zero curve N of power supply are reversed
Therefore.
The electrocution-proof protection power sense circuit is additionally provided with Kick type temperature switch S1, the Kick type temperature switch
S1 is connected on the circuit between electric heating tube load 1 and power firestreak.When there are abnormal conditions in electric heater heating,
Kick type temperature switch 1 powers off tripping, is conducive to protect the liner water temperature of electric heater to be no more than the safe water temperature of highest.
This electrocution-proof protection system further includes to hang on electric heater into the metal hanging rack of wall, the metal hanging rack
It is connected with the earth.In the case that the firewire L and zero curve N of input power are reversed or electric heater ground wire fails, due to electricity
Water heater mounting means is to hang on wall, and electric heater can be connected by metal hanging rack with the earth, by above-mentioned connection mode,
Photo-coupler U3 pins one and pin two can generate potential difference, so as to which photo-coupler U2 pins four be driven to export low level, ibid
Operation principle, cut-out load electrothermal tube power and ground wire connection are stated, reaches the reversed generation of firewire L and zero curve N avoided because of power supply
The purpose of electric shock accidents.
Electric leakage accident occurs for electric heater, and predominantly electrothermal tube defective insulation or electrothermal tube booster is passed through the water in liner
Caused by leading and the electric leakage of Kick type temperature switch causes.It is existing to use zero under electric heater ground connection defective mode
Sequence mutual inductor electric leakage protection technology will fail, and not have the effect of electrocution-proof protection.China region is wide, is particularly rural area
Family also there is a situation where largely to use electric line unearthed line, and with the presence of the ground wire grounded insecure situation of family, this
It is uncertain that a little national conditions determine that Electrical Safety exists.The system can not connect under electric heater ground connection defective mode or
In the case of ground, the generation of electric shock accidents is avoided, electric shock accidents is avoided to cause life injury and property loss, generates good society
Economic benefit.
The above is presently preferred embodiments of the present invention, the invention is not limited in the above embodiment, as long as
It reaches the technique effect of the present invention with identical means, should all belong to the scope of protection of the present invention.
Claims (7)
1. a kind of electrocution-proof protection system of electric heater, it is characterised in that：It is described including electrocution-proof protection power sense circuit
Electrocution-proof protection power sense circuit is provided with relay one（RELAY1）, relay two（RELAY2）, relay three
（RELAY3）, photo-coupler（U2）, repeat circuit two（RELAY2）For closed type relay, relay one（RELAY1）, after
Electric appliance three（RELAY3）For normal-open type relay；The relay one（RELAY1）, relay two（RELAY2）, relay three
（RELAY3）Coil be connected respectively with a main control module, from the main control module to relay one（RELAY1）, relay two
（RELAY2）, relay three（RELAY3）Output control power supply signal；
The relay one（RELAY1）Contact A and power firestreak（L）Connection, contact B are loaded with electric heating tube（1）Connection；
The relay two（RELAY2）Contact A and power ground（G）Connection, contact B and electric heater ladle body earth point（2）
Connection；
The relay three（RELAY3）Contact A and relay two（RELAY2）Contact B connections, contact B is connected to optocoupler
Clutch（U2）The anode of middle light emitting diode；
The photo-coupler（U2）The cathode and zero-power line of middle light emitting diode（N）Connection, the collector of phototriode with
The input terminal connection of main control module, the emitter ground connection of phototriode.
2. a kind of electrocution-proof protection system of electric heater according to claim 1, it is characterised in that：The protection against electric shock is protected
Shield power sense circuit is additionally provided with Kick type temperature switch（S1）, the Kick type temperature switch（S1）It is connected to electric heating tube
Load（1）On circuit between power firestreak.
3. a kind of electrocution-proof protection system of electric heater according to claim 1, it is characterised in that：It further includes to incite somebody to action
Electric heater hangs on the metal hanging rack of wall, and the metal hanging rack is connected with the earth.
4. a kind of electrocution-proof protection system of electric heater according to claim 1, it is characterised in that：The main control module
Including main control chip（3）And its peripheral circuit.
5. a kind of electrocution-proof protection system of electric heater according to claim 4, it is characterised in that：The main control module
It is additionally provided with display module, the output terminal connection of the display module and main control chip.
6. a kind of electrocution-proof protection system of electric heater according to claim 4, it is characterised in that：The main control module
It is additionally provided with the buzzer for leakage-current alarm（4）, the buzzer（4）With main control chip（3）Output terminal connection.
7. according to a kind of electrocution-proof protection system of any electric heaters of claim 4-6, it is characterised in that：The master
Control chip（3）Using 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 CN104753030A (en) | 2015-07-01 |
| CN104753030B true CN104753030B (en) | 2018-05-22 |
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| 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 |
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| CN (1) | CN104753030B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| 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 |
| CN204424871U (en) * | 2015-02-27 | 2015-06-24 | 张正怡 | A kind of electrocution-proof protection system of electric heater |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2015
- 2015-02-27 CN CN201510090300.8A patent/CN104753030B/en active Active
Patent Citations (6)
| 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 |
| CN204424871U (en) * | 2015-02-27 | 2015-06-24 | 张正怡 | A kind of electrocution-proof protection system of electric heater |
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| Publication number | Publication date |
|---|---|
| CN104753030A (en) | 2015-07-01 |
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| 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 |
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| GR01 | Patent grant |