CN202696108U - Voltage type leakage protection power line overcurrent protection device used for electric water heater - Google Patents
Voltage type leakage protection power line overcurrent protection device used for electric water heater Download PDFInfo
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- CN202696108U CN202696108U CN 201220380159 CN201220380159U CN202696108U CN 202696108 U CN202696108 U CN 202696108U CN 201220380159 CN201220380159 CN 201220380159 CN 201220380159 U CN201220380159 U CN 201220380159U CN 202696108 U CN202696108 U CN 202696108U
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Abstract
The utility model discloses a voltage type leakage protection power line overcurrent protection device used for an electric water heater. The voltage type leakage protection power line overcurrent protection device used for the electric water heater comprises a sequence switch, a leakage current mutual inductance coil, an electric leakage detection circuit, an E-N mutual inductance coil detection circuit, a valve value voltage detection circuit, a protection execution circuit, a mechanical release/actuation device, and an E line power supply mutual inductance coil detection circuit. The leakage current mutual inductance coil detects the leakage currents from a live wire and a zero line, and transmits signals to the electric leakage detection circuit. The E line power supply mutual inductance coil detection circuit detects the current value from a ground wire, and transmits signals to the electric leakage detection circuit. The E-N mutual inductance coil detection circuit detects the voltage signals between the zero line and the ground wire, and outputs the voltage signals to the valve value voltage detection circuit. The electric leakage detection circuit and the valve value voltage detection circuit transmit signals to the protection execution circuit. The protection execution circuit controls the opening and closing of the sequence switch through the mechanical release/actuation device based on the received signals. The device can protect the personal safety of a user of the electric water heater and prevent the property loss in all directions.
Description
Technical field
The utility model relates to a kind of voltage-type for electric heater and leaks guarantor's power line overcurrent protective device.
Background technology
Earth leakage protective device on the existing market all adopts the current detection type earth leakage protective device; it is except realizing over the ground (E) loop current of live wire (L), zero line (N)〉during 5mA; outside the cutting function of realization to power supply and load; in the time of realizing that also zero line and ground line current reach 30mA; 0.1s interior to power supply and load cutting function, but being the current detection type earth leakage protective device, its loop can't 100% ensures user's person and property safety.The current detection type earth leakage protective device mainly contains following shortcoming and can't overcome:
Country's power utilization environment has two kinds, be protective ground and protectiveness connecting to neutral, no matter adopt which kind of connection, socket E line and N line loop voltage is some voltage all, this voltage is objective reality, and GB GB_20044-2005 electrical accessory family expenses and similar applications do not reach 30mA with the loop current in the portable residual current device (PRCD) of overcurrent protection the time, 0.1s interior must be to power supply and the mandatory cutting function of load, and earth resistance is generally all less than 0.1 Ω, that is to say that Compulsory Feature E line and N line loop voltage are necessary for 30mA*0.1 Ω=0.001V, and just now talked about socket E line and N line loop voltage all has certain voltage poor, in fact the different systems electric power system generally has the following voltage of 10V, this voltage is objective reality, this moment, E line and N line loop electric current were inevitable greater than 30mA, leak to protect must deenergization for current detection type three lines so, make its not deenergization, must make inner container of electric water heater and wall and water pipe circuit do insulation (generally adopting the red blue water pipe head of plastics and inner container insulating hanger), so that E line and N line loop electric current are less than 30mA, reach earth leakage protective device with this and be unlikely to false tripping, avoid impact to use, but be to have promoted E-N socket voltage relatively, generally false tripping voltage does not maintain more than the 64V very that the person reaches 90V, this voltage serious threat to personal safety;
Connect the red blue water pipe head of plastics at the storage-type electric water heater output and reduce E line and N line loop electric current to increase water resistance, also will increase the inner inner bag of electric heater and casing insulation device simultaneously, this will consume a large amount of costs;
The restriction that increases the inner inner bag of electric heater and the existing Patents of casing insulation device causes the situation of seal exclusive supply, be unfavorable for the development of enterprise, this voltage-type leaks to protect and contains independent ground wire power supply mutual inductor testing circuit simultaneously, in the time of can overcoming E and N electromotive force pressure reduction＜50V, because of cause specific (though probability is little, but voltage occurs leak the situation of not jumping of protecting, the consequence that causes also can be very serious) the motionless start of voltage-type leakage guarantor, and this moment, electric current＜50mA in the E line loop, same machinery release/attracting device on time sequence cuts off respectively L-N (synchronously), and E reaches and cuts off the electricity supply and the load purpose.When preventing ground wire and zero line electrified voltage less than 50V, voltage-type leaks to protect is failure to actuate and causes power line overcurrent phenomenon, causes power line to burn.
And can solve as above problem without any an enterprise at present, cause enterprise to face being unfavorable for the situation of self-development.
Summary of the invention
In order to overcome defects, the utility model provides a kind of voltage-type for electric heater to leak and has protected the power line overcurrent protective device, and personal safety and property that can omnibearing protection electric heater user not be suffered a loss.
The utility model for the technical scheme that solves its technical problem and adopt is: a kind of voltage-type for electric heater leaks protects the power line overcurrent protective device; comprise sequence switch; the leakage current mutual inductor; electric-leakage detection circuit; E-N mutual inductor testing circuit; threshold voltage detection circuit; the protection executive circuit; machinery discharge attracting device and E line power supply mutual inductor testing circuit; described leakage current mutual inductor detects from the leakage current on live wire and the zero line and delivers a letter to electric-leakage detection circuit; described E line power supply mutual inductor testing circuit detects from the current value of ground wire and delivers a letter to electric-leakage detection circuit; described E-N mutual inductor testing circuit detects from the voltage signal between zero line and the ground wire and exports to threshold voltage detection circuit; described electric-leakage detection circuit is delivered a letter respectively to the protection executive circuit according to the magnitude of voltage that detects according to the current value that receives and described threshold voltage detection circuit, this protection executive circuit according to the signal that receives by described machinery release attracting device control the switching of described sequence switch.
As further improvement of the utility model; when the loop current of any a pair of ground wire is greater than 50mA in live wire and the ground wire; the leakage current mutual inductor will output signal to the protection executive circuit, this protection executive circuit by described machinery discharge attracting device control the disconnection of described sequence switch.
As further improvement of the utility model, when described E-N mutual inductor testing circuit produces electromotive force pressure reduction greater than 50V, described threshold voltage detection circuit deliver a letter to the protection executive circuit by described machinery discharge attracting device described sequence switch is disconnected.
As further improvement of the utility model, the resistance of two 1.5M Ω of serial connection in zero line that described E-N mutual inductor testing circuit connects and earth loop.
As further improvement of the utility model; when the described zero line that described protection executive circuit receives and ground wire electromotive force pressure reduction ﹤ 50V and earth loop electric current ﹤ 50mA, this protection executive circuit by described machinery discharge attracting device control the disconnection of described sequence switch.
As further improvement of the utility model, the error-polarity connection of power supply of live wire and zero line in the socket, and ground wire contacts when good, and described protection executive circuit discharges the disconnection that the attracting device is controlled described sequence switch by described machinery.
The beneficial effects of the utility model are:
1. any end of L and N is to the E loop current〉during 5mA, this device on time sequence cuts off respectively L-N (synchronously), E, reaches and cuts off the electricity supply and load.
When 2. E and N loop voltage surpassed 50V, this device on time sequence cut off respectively L-N (synchronously), E, reaches and cuts off the electricity supply and load.
3. in the socket when L and N error-polarity connection of power supply, the E(ground wire being arranged) under the prerequisite, this device on time sequence cuts off respectively L-N (synchronously), E, reaches and cuts off the electricity supply and load.
4. when E and N electromotive force pressure reduction＜50V, voltage-type leaks to be protected the voltage that does not reach 50V and jumps disconnected value, may be failure to actuate, and electric current＜50mA in this moment E line loop, this installs equally on time sequence and cuts off respectively L-N (synchronously), E, reaches and cuts off the electricity supply and load.
5. storage-type electric water heater internal body inner bag need not and casing insulation, thereby saves the lot of materials cost.
6. storage-type electric water heater cold water input and output end of hot water need not to connect red blue joint, thereby also can save the lot of materials cost.
7. thoroughly overcome N/E current detection type earth leakage protective device false tripping problem.
8. thoroughly overcome N/E voltage when＜50V, voltage-type leaks to be protected the power line that causes power line overcurrent phenomenon and cause of may being failure to actuate and burns.
9. thoroughly avoided the restricted problem of collets patent.
Description of drawings
Fig. 1 is the utility model structural representation.
By reference to the accompanying drawings, make the following instructions:
K---sequence switch
1---the leakage current mutual inductor
2---electric-leakage detection circuit
3---E-N mutual inductor testing circuit
4---threshold voltage detection circuit
5---the protection executive circuit
6---machinery discharge attracting device
7---E line power supply mutual inductor testing circuit
L---live wire
N---zero line
E---ground wire
Embodiment
By reference to the accompanying drawings; the utility model is elaborated; but protection range of the present utility model is not limited to following embodiment, and the simple equivalence of namely in every case being done with the utility model claim and description changes and modifies, and all still belongs within the utility model patent covering scope.
A kind of voltage-type for electric heater leaks protects the power line overcurrent protective device; comprise sequence switch K; leakage current mutual inductor 1; electric-leakage detection circuit 2; E-N mutual inductor testing circuit 3; threshold voltage detection circuit 4; protection executive circuit 5; machinery discharge attracting device 6 and E line power supply mutual inductor testing circuit 7; described leakage current mutual inductor detects from the leakage current on live wire L and the zero line N and delivers a letter to electric-leakage detection circuit; described E line power supply mutual inductor testing circuit detects from the current value of ground wire E and delivers a letter to electric-leakage detection circuit; described E-N mutual inductor testing circuit detects from the voltage signal between zero line N and the ground wire E and exports to threshold voltage detection circuit; described electric-leakage detection circuit is delivered a letter respectively to the protection executive circuit according to the magnitude of voltage that detects according to the current value that receives and described threshold voltage detection circuit, this protection executive circuit according to the signal that receives by described machinery release attracting device control the switching of described sequence switch.Like this; equivalent by the voltage and current that leakage current mutual inductor, N-E coil mutual inductance circuit and E line power supply mutual inductor testing circuit detect respectively between live wire, zero line and the ground wire; when they require above regulation; the protection executive circuit by machinery discharge the disconnection of attracting device control sequence switch; thereby power supply and load are disconnected, effectively protect electrical equipment user safety.
Preferably; when the loop current of any a pair of ground wire is greater than 50mA in live wire and the ground wire; the leakage current mutual inductor will output signal to the protection executive circuit; this protection executive circuit by described machinery discharge attracting device control the disconnection of described sequence switch, reach the purpose of cutting off the electricity supply with load.
Preferably; when described E-N mutual inductor testing circuit produces electromotive force pressure reduction greater than 50V; described threshold voltage detection circuit deliver a letter to the protection executive circuit by described machinery discharge attracting device described sequence switch is disconnected, reach the purpose of cutting off the electricity supply with load.
Preferably, the resistance of two 1.5M Ω of serial connection plays metering function in zero line that described E-N mutual inductor testing circuit connects and earth loop.
Preferably; when the described zero line that described protection executive circuit receives and ground wire electromotive force pressure reduction ﹤ 50V and earth loop electric current ﹤ 50mA; this protection executive circuit by described machinery discharge attracting device control the disconnection of described sequence switch; reach the purpose of cutting off the electricity supply with load; when preventing ground wire and zero line electrified voltage less than 50V; voltage-type leakage guarantor is failure to actuate and causes power line overcurrent phenomenon, causes power line to burn.
Preferably, the error-polarity connection of power supply of live wire and zero line in the socket, and ground wire contacts when good, and described protection executive circuit discharges the disconnection that the attracting device is controlled described sequence switch by described machinery, reaches the purpose of cutting off the electricity supply with load.
Claims (6)
1. a voltage-type that is used for electric heater leaks guarantor's power line overcurrent protective device; it is characterized in that: comprise sequence switch (K); leakage current mutual inductor (1); electric-leakage detection circuit (2); E-N mutual inductor testing circuit (3); threshold voltage detection circuit (4); protection executive circuit (5); machinery discharge attracting device (6) and E line power supply mutual inductor testing circuit (7); described leakage current mutual inductor detects from the leakage current on live wire (L) and the zero line (N) and delivers a letter to electric-leakage detection circuit; described E line power supply mutual inductor testing circuit detects from the current value of ground wire (E) and delivers a letter to electric-leakage detection circuit; described E-N mutual inductor testing circuit detects from the voltage signal between zero line (N) and the ground wire (E) and exports to threshold voltage detection circuit; described electric-leakage detection circuit is delivered a letter respectively to the protection executive circuit according to the magnitude of voltage that detects according to the current value that receives and described threshold voltage detection circuit, this protection executive circuit according to the signal that receives by described machinery release attracting device control the switching of described sequence switch.
2. the voltage-type for electric heater according to claim 1 leaks and protects the power line overcurrent protective device; it is characterized in that: when the loop current of any a pair of ground wire is greater than 50mA in live wire and the ground wire; the leakage current mutual inductor will output signal to the protection executive circuit, this protection executive circuit by described machinery discharge attracting device control the disconnection of described sequence switch.
3. the voltage-type for electric heater according to claim 1 leaks and protects the power line overcurrent protective device; it is characterized in that: when described E-N mutual inductor testing circuit produces electromotive force pressure reduction greater than 50V, described threshold voltage detection circuit deliver a letter to the protection executive circuit by described machinery discharge attracting device described sequence switch is disconnected.
4. the voltage-type for electric heater according to claim 1 leaks and protects the power line overcurrent protective device, it is characterized in that: the resistance of two 1.5M Ω of serial connection in zero line that described E-N mutual inductor testing circuit connects and earth loop.
5. the voltage-type for electric heater according to claim 1 leaks and protects the power line overcurrent protective device; it is characterized in that: when the described zero line that described protection executive circuit receives and ground wire electromotive force pressure reduction ﹤ 50V and earth loop electric current ﹤ 50mA, this protection executive circuit by described machinery discharge attracting device control the disconnection of described sequence switch.
6. the voltage-type for electric heater according to claim 1 leaks and protects the power line overcurrent protective device; it is characterized in that: the error-polarity connection of power supply of live wire and zero line in the socket; and ground wire contacts when good, described protection executive circuit by described machinery discharge attracting device control the disconnection of described sequence switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220380159 CN202696108U (en) | 2012-08-01 | 2012-08-01 | Voltage type leakage protection power line overcurrent protection device used for electric water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220380159 CN202696108U (en) | 2012-08-01 | 2012-08-01 | Voltage type leakage protection power line overcurrent protection device used for electric water heater |
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| CN202696108U true CN202696108U (en) | 2013-01-23 |
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| CN 201220380159 Expired - Fee Related CN202696108U (en) | 2012-08-01 | 2012-08-01 | Voltage type leakage protection power line overcurrent protection device used for electric water heater |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103579992A (en) * | 2012-08-01 | 2014-02-12 | 樱花卫厨（中国）股份有限公司 | Voltage type leakage protection power line over-current protection device for electric water heater |
| CN104570900A (en) * | 2015-01-26 | 2015-04-29 | 芜湖美的厨卫电器制造有限公司 | Voltage protection circuit for water heater and water heater |
| CN106322767A (en) * | 2015-06-23 | 2017-01-11 | 青岛经济技术开发区海尔热水器有限公司 | Electric water heater and control method |
| CN106451329A (en) * | 2016-07-19 | 2017-02-22 | 中山市开普电器有限公司 | Leakage protection apparatus |
-
2012
- 2012-08-01 CN CN 201220380159 patent/CN202696108U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103579992A (en) * | 2012-08-01 | 2014-02-12 | 樱花卫厨（中国）股份有限公司 | Voltage type leakage protection power line over-current protection device for electric water heater |
| CN103579992B (en) * | 2012-08-01 | 2016-08-17 | 樱花卫厨（中国）股份有限公司 | Voltage type leakage protection power line over-current protection device for electric heater |
| CN104570900A (en) * | 2015-01-26 | 2015-04-29 | 芜湖美的厨卫电器制造有限公司 | Voltage protection circuit for water heater and water heater |
| CN106322767A (en) * | 2015-06-23 | 2017-01-11 | 青岛经济技术开发区海尔热水器有限公司 | Electric water heater and control method |
| CN106322767B (en) * | 2015-06-23 | 2019-11-05 | 青岛经济技术开发区海尔热水器有限公司 | Electric water heater and control method |
| CN106451329A (en) * | 2016-07-19 | 2017-02-22 | 中山市开普电器有限公司 | Leakage protection apparatus |
| CN106451329B (en) * | 2016-07-19 | 2019-04-05 | 中山市开普电器有限公司 | A kind of earth leakage protective device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130123 Termination date: 20140801 |
|
| EXPY | Termination of patent right or utility model |