CN203456848U - Electric leakage detection protection device of electric kettle - Google Patents
Electric leakage detection protection device of electric kettle Download PDFInfo
- Publication number
- CN203456848U CN203456848U CN201320392084.9U CN201320392084U CN203456848U CN 203456848 U CN203456848 U CN 203456848U CN 201320392084 U CN201320392084 U CN 201320392084U CN 203456848 U CN203456848 U CN 203456848U
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- Prior art keywords
- electric
- kettle
- zero sequence
- chip microcomputer
- sequence current
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- 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.)
- Expired - Lifetime
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- 238000001514 detection method Methods 0.000 title claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 230000001681 protective effect Effects 0.000 claims description 12
- 238000004804 winding Methods 0.000 claims description 11
- 239000004020 conductor Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 3
- 238000009841 combustion method Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model provides an electric leakage detection protection device of electric kettle, protection device including setting up the safety protection circuit between the kettle body and the base of electric kettle, the safety protection circuit include mechanical switch, heating tube, the safety protection circuit still include relay, singlechip, current detection device and zero sequence current transformer, the beneficial effects of the utility model reside in that electric leakage detection protection device has increased zero sequence current transformer in heating control circuit, utilizes zero sequence current transformer can be when kettle ground connection breaks down and produces the electric leakage, in time detects the leakage signal and makes electric kettle stop work, has increased the electric leakage automatic protection function of electric kettle on prior art's basis, has compensatied the not enough of electric kettle existence among the prior art, has apparent effect in the aspect of practicing thrift electric energy, protecting personal safety.
Description
Technical field
The utility model relates to the automatic safety device of electric kettle, relates in particular to the automatic safety device in the control circuit of electric kettle.
Background technology
Electric kettle has been used very general, and its convenient, healthy characteristic is firmly got user and liked.The defencive function of electric kettle self only has dry burning protection function at present; being about to a temperature kick switch is arranged on heat-generating disc bottom and is serially connected in circuit with heat-generating disc; when there is the situation of dry combustion method in kettle; the temperature of heat-generating disc sharply rises and reaches the disconnected temperature of jumping of temperature kick switch; thereby make kick switch motion and cut off the electricity supply, to realize the function of automatic protection., though can realize the automatically function of protection, if kettle long-term work may cause dry combustion method protection to be lost efficacy, thereby may there is wasting the situation that electric energy, human electric shock even can initiation fires etc. in this single dry burning protection function.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of detection and protection apparatus for leakage of electric kettle, increases on the basis of existing technology a kind of new automatic protection functions, and simple in structure, with low cost, working stability.
The technical scheme that the utility model technical solution problem adopts is: a kind of detection and protection apparatus for leakage of electric kettle, described protective device comprises and is arranged on safety protective circuit between the kettle body of electric kettle and base, described safety protective circuit comprises mechanical switch, heat-generating pipe, described safety protective circuit also comprises relay, single-chip microcomputer, current sensing means and zero sequence current mutual inductor, described single-chip microcomputer is provided with enabling signal input, current signal input, electric leakage signal input and heating signal output, the heating signal output of described single-chip microcomputer connects relay, the current signal input of described current sensing means access single-chip microcomputer, described zero sequence current mutual inductor output is connected with single-chip microcomputer treatment circuit and is formed secondary closure loop.
When adopting technique scheme, the utility model can also adopt following further technical scheme: described zero sequence current mutual inductor comprises the annular core of being made by sheet metal coil, in described annular core, pass and have the current carrying conductor as a winding of zero sequence current mutual inductor, the secondary winding uniform winding of zero sequence current mutual inductor, on annular core, and accesses the electric leakage signal input of described single-chip microcomputer by treatment circuit.
The beneficial effects of the utility model are: detection and protection apparatus for leakage of the present utility model has increased zero sequence current mutual inductor in heating control circuit; utilize zero sequence current mutual inductor to break down while producing electric leakage kettle ground connection; electric leakage signal detected in time and electric kettle is quit work; increased on the basis of existing technology the electric leakage automatic protection functions of electric kettle; make up the deficiency that electric kettle of the prior art exists, at aspects such as saves energy, protection personal safety, there is significant effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of detection and protection apparatus for leakage provided by the utility model.
Number in the figure: 1-mechanical switch, 2-heat-generating pipe, 3-relay, 4-single-chip microcomputer, 5-current sensing means, 6-zero sequence current mutual inductor, 7-enabling signal input, 8-current signal input, 9-electric leakage signal input, 10-heating signal output, 11-treatment circuit.
Embodiment
With reference to accompanying drawing.A kind of detection and protection apparatus for leakage of electric kettle, described protective device comprises and is arranged on safety protective circuit between the kettle body of electric kettle and base, described safety protective circuit comprises mechanical switch 1, heat-generating pipe 2, described safety protective circuit also comprises relay 3, single-chip microcomputer 4, current sensing means 5 and zero sequence current mutual inductor 6, described single-chip microcomputer 4 is provided with enabling signal input 7, current signal input 8, electric leakage signal input 9 and heating signal output 10, enabling signal button connects the enabling signal input 7 of single-chip microcomputer 4, the current signal input 8 of current sensing means 5 access single-chip microcomputers, the heating signal output 10 of single-chip microcomputer 4 connects relay 3.
Described zero sequence current mutual inductor 5 comprises the annular core of being made by sheet metal coil, in described annular core, pass and have the current carrying conductor as a winding of zero sequence current mutual inductor 6, the secondary winding uniform winding of zero sequence current mutual inductor 6 is on annular core, and by the electric leakage signal input 9 of the described single-chip microcomputer 4 for the treatment of circuit 11 access, zero sequence current mutual inductor 6 outputs are connected with single-chip microcomputer treatment circuit 11 and are formed secondary closure loop.
During electric kettle work, after startup button is pressed, enabling signal is sent to single-chip microcomputer 4 from enabling signal input 7, single-chip microcomputer 4 control relay 3 adhesives make kettle enter operating state, now current sensing means 5 has detected current signal and has been input to single-chip microcomputer 4, after kettle is boiled, mechanical switch 1 is jumped to break kettle is quit work, the current signal at current sensing means 5 places disappears simultaneously, when single-chip microcomputer 4 detects current signal disappearance, control relay 3 disconnects, cut off heating circuit, even if water temperature is cooling afterwards while making mechanical switch 1 closed, kettle can not enter heated condition yet, until start button, be again pressed.This is electric kettle of the present utility model heating work principle in normal operation.
When kettle is in the situation that working, in circuit, the phase current algebraical sum of each node is zero, so the output of the secondary winding no signal of zero sequence current mutual inductor 6, the electric leakage signal input 9 no signals inputs of single-chip microcomputer 4; Electric kettle works according to above-mentioned principle; for example, when kettle ground connection is broken down (situation of getting an electric shock appears in human body touch kettle); algebraical sum through each phase current of zero sequence current mutual inductor 6 is non-vanishing; fault current makes to produce magnetic flux in the annular core of zero sequence current mutual inductor 6; thereby make the secondary winding end of zero sequence current mutual inductor 6 to electric leakage signal input 9 input signals of single-chip microcomputer 4; single-chip microcomputer 4 is controlled kettle by relay 3 and is quit work, to reach the electric leakage object of protection automatically.
Claims (2)
1. the detection and protection apparatus for leakage of an electric kettle, described protective device comprises and is arranged on safety protective circuit between the kettle body of electric kettle and base, described safety protective circuit comprises mechanical switch, heat-generating pipe, it is characterized in that: described safety protective circuit also comprises relay, single-chip microcomputer, current sensing means and zero sequence current mutual inductor, described single-chip microcomputer is provided with enabling signal input, current signal input, electric leakage signal input and heating signal output, the heating signal output of described single-chip microcomputer connects relay, the current signal input of described current sensing means access single-chip microcomputer, the output of described zero sequence current mutual inductor is connected with single-chip microcomputer treatment circuit and is formed secondary closure loop.
2. the detection and protection apparatus for leakage of a kind of electric kettle according to claim 1; it is characterized in that: described zero sequence current mutual inductor comprises the annular core of being made by sheet metal coil; in described annular core, pass and have the current carrying conductor as a winding of zero sequence current mutual inductor; the secondary winding uniform winding of zero sequence current mutual inductor, on annular core, and accesses the electric leakage signal input of described single-chip microcomputer by treatment circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320392084.9U CN203456848U (en) | 2013-07-02 | 2013-07-02 | Electric leakage detection protection device of electric kettle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320392084.9U CN203456848U (en) | 2013-07-02 | 2013-07-02 | Electric leakage detection protection device of electric kettle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203456848U true CN203456848U (en) | 2014-02-26 |
Family
ID=50136701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320392084.9U Expired - Lifetime CN203456848U (en) | 2013-07-02 | 2013-07-02 | Electric leakage detection protection device of electric kettle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203456848U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107069660A (en) * | 2017-04-10 | 2017-08-18 | 浦北县金洋电厨具有限公司 | Detection and protection apparatus for leakage |
-
2013
- 2013-07-02 CN CN201320392084.9U patent/CN203456848U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107069660A (en) * | 2017-04-10 | 2017-08-18 | 浦北县金洋电厨具有限公司 | Detection and protection apparatus for leakage |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140226 |
|
| CX01 | Expiry of patent term | ||
| CU01 | Correction of utility model |
Correction item: Termination upon expiration of patent Correct: Revocation of Patent Expiration and Termination False: Expiration and Termination of 39 Volume 2901 Patent on July 18, 2023 Number: 29-01 Volume: 39 |
|
| CU01 | Correction of utility model |