CN206697915U - Detection and protection apparatus for leakage - Google Patents
Detection and protection apparatus for leakage Download PDFInfo
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- CN206697915U CN206697915U CN201720367865.0U CN201720367865U CN206697915U CN 206697915 U CN206697915 U CN 206697915U CN 201720367865 U CN201720367865 U CN 201720367865U CN 206697915 U CN206697915 U CN 206697915U
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- kitchen tools
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- electric kitchen
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Abstract
The utility model discloses detection and protection apparatus for leakage, zero sequence current mutual inductor is set, signal processing module, current detection module, controller module, relay module and key switch, after lower switch, zero sequence current mutual inductor receives outside civil power, carry out signal transacting and current detecting, there is leakage phase no, it is under-voltage, in the case of overvoltage, controller module sends control signal to relay module, electric kitchen tools mechanical switch is controlled to turn on, electric kitchen tools electrothermal tube starts to generate heat, it is this directly to extract outside city electric signal, detected, processing and the full-automatic mode judged, detection is accurate, it is active in one's movements, earth leakage protective purpose can effectively be realized；Line temperature detection module is set, in circuit temperature anomaly, control signal is sent from controller module to relay, disconnect electric kitchen tools mechanical switch, the detection of leakage current and the detection of line temperature are carried out simultaneously, whichever numerical exception, and controller can control electric kitchen tools mechanical switch to power off.
Description
Technical field
It the utility model is related to the electric kitchen tools of daily life, and in particular to a kind of detection of electrical leakage applied on electric kitchen tools is protected
Protection unit.
Background technology
Electric kitchen tools generally include electric frying pan, electric oven, electric cooker, electric wok etc..Nowadays, electric kitchen tools are widelyd popularize,
It is widely used in common people's daily life, is greatly facilitated to the common people.
Electric kitchen tools carry out power on/off to electrothermal tube, realize the control of temperature and power in use, by mains-supplied.In electricity
During the use of kitchen tools, waste electric energy and leakage may be triggered because outside mains-supplied is unstable or itself circuit has failure
The problem of electric, therefore, it is necessary to carry out current leakage detection protection to electric kitchen tools, avoid wasting electric energy, prevent user from getting an electric shock.Traditional
Detection and protection apparatus for leakage, it is electromechanical, detection inaccuracy, the insensitive shortcoming of action is present, is unable to reach earth leakage protective
Purpose.
Utility model content
The utility model provides detection and protection apparatus for leakage, solves the existing detection and protection apparatus for leakage applied to electric kitchen tools
Existing detection is inaccurate, action is insensitive, the problem of can not effectively realizing earth leakage protective.
The utility model solves the above problems by the following technical programs：
Detection and protection apparatus for leakage, including electric kitchen tools mechanical switch, electric kitchen tools electrothermal tube and electric hot tray, the electric kitchen tools
When mechanical switch closes, the electric kitchen tools electrothermal tube conducting, electric hot tray heating, further comprise zero sequence current mutual inductor, letter
Number processing module, current detection module, controller module, relay module and key switch；
The zero sequence current mutual inductor receives the output signal of outside civil power, the output all the way of the zero sequence current mutual inductor
End is connected with the input of current detection module, the another way output end of the zero sequence current mutual inductor and signal processing module
Input is connected, and the another road output end of the zero sequence current mutual inductor is connected with the input of relay module, the zero sequence
Another road output end of current transformer is connected with electric kitchen tools electrothermal tube；The output end of the current detection module and controller mould
Block is connected；The output end of the signal processor module is connected with controller module；The control terminal of the relay module and control
Device module processed is connected, and the output end of the relay module is connected with the control terminal of electric kitchen tools mechanical switch；The key switch
Output end be connected with controller module.
Further comprise line temperature detection module；The output end of the line temperature detection module and controller module phase
Even.
Further, the signal processing module includes signal amplification submodule and analog-to-digital conversion submodule；The signal
The input of amplification submodule is connected with the another way output end of zero sequence current mutual inductor；The output of the signal amplification submodule
End is connected with the input of analog-to-digital conversion submodule；The output end of the analog-to-digital conversion submodule is connected with controller module.
Further, the line temperature detection module is temperature sensor.
Further, the zero sequence current mutual inductor includes annular core, first winding and secondary winding；The annular iron
Core is rolled by sheet metal and formed；The first winding is current carrying conductor, through annular core madial wall；The secondary winding is uniform
Annular core lateral wall is wrapped in, the output signal of the secondary winding is exported to controller module through signal processing module.
Compared with prior art, there are following features：
The 1st, zero sequence current mutual inductor, signal processing module, current detection module, controller module, relay module are set
And key switch, after lower switch, zero sequence current mutual inductor receives outside civil power, carries out signal transacting and current detecting,
Do not occur leak phase, it is under-voltage, over-pressed in the case of, controller module to relay module send control signal, control electric kitchen tools
Mechanical switch turns on, and electric kitchen tools electrothermal tube starts to generate heat, electric kitchen tools normal work, this directly to extract outside city electric signal, enters
Row detection, processing and the full-automatic mode judged, detection is accurate, is active in one's movements, and can effectively realize earth leakage protective purpose；
The 2nd, line temperature detection module is set, temperature detection is carried out to the circuit of electric kitchen tools, in circuit temperature anomaly, by
Controller module sends control signal to relay, disconnects electric kitchen tools mechanical switch, the detection of leakage current and line temperature
Detection is carried out simultaneously, whichever numerical exception, and controller can control electric kitchen tools mechanical switch to power off, and leaky is provided
Double check, there is provided duplicate protection, further improve creepage protection function.
Brief description of the drawings
Fig. 1 is the utility model structural principle block diagram.
Embodiment
The utility model is described in further detail with reference to embodiments, but the utility model is not limited to these implementations
Example.
Detection and protection apparatus for leakage, including electric kitchen tools mechanical switch, electric kitchen tools electrothermal tube and electric hot tray, the electric kitchen tools
When mechanical switch closes, the electric kitchen tools electrothermal tube conducting, electric hot tray heating, in addition to zero sequence current mutual inductor, signal transacting
Module, current detection module, controller module, relay module and key switch；The zero sequence current mutual inductor receives outer
The output signal of portion's civil power, the output end all the way of the zero sequence current mutual inductor and the input of current detection module connect, institute
The another way output end for stating zero sequence current mutual inductor is connected with the input of signal processing module, the zero sequence current mutual inductor
Another road output end is connected with the input of relay module, another road output end and the electric kitchen tools of the zero sequence current mutual inductor
Electrothermal tube is connected；The output end of the current detection module is connected with controller module；The output of the signal processor module
End is connected with controller module；The control terminal of the relay module is connected with controller module, the relay module it is defeated
Go out end with the control terminal of electric kitchen tools mechanical switch to be connected；The output end of the key switch is connected with controller module.
The zero sequence current mutual inductor includes annular core, first winding and secondary winding；The annular core is by metal
Piece, which rolls, to be formed；The first winding is current carrying conductor, through annular core madial wall；The secondary winding uniform winding is in ring
Shape iron core lateral wall, the output signal of the secondary winding are exported to controller module through signal processing module.Utilize zero sequence electricity
Current transformer can detect electric leakage signal in time in electric leakage, and input into controller module, be controlled by controller module
Electric kitchen tools are stopped.
The signal processing module includes signal amplification submodule and analog-to-digital conversion submodule；The signal amplifies submodule
Input be connected with the another way output end of zero sequence current mutual inductor；The output end of the signal amplification submodule turns with modulus
The input for changing submodule is connected；The output end of the analog-to-digital conversion submodule is connected with controller module.Zero sequence current mutual inductance
The signal output of device to signal amplification submodule is amplified, and the signal output of signal amplification submodule is to analog-to-digital conversion submodule
Analog-to-digital conversion is carried out, then is inputted into controller module, obtains the amplitude of leakage current with existing program by controller module
And phase.When no leak electricity, no leakage current signal is inputted to controller module, when leaking electricity, is then had Lou
Electric current is inputted to controller module, and when leakage current reaches preset value, controller module controls electric kitchen tools mechanical switch to break
Open.
Current detection module be used for detect circuit circulating current, for judge the utility model whether normal work.Electric kitchen
Electric current be present when having normal work, in circuit, current detection module output current signal into controller module, when electric kitchen tools because
When other reasons are stopped, current detection module non-output signal, then controller module control relay module disconnect electric kitchen
The mechanical switch of tool, cut off the loop of electric kitchen tools circuit system.Electric kitchen tools circuit system includes electric kitchen tools mechanical switch, electric kitchen tools
Electrothermal tube and the other circuits of electric kitchen tools, three parts series connection, form circuit loop.
During user's electric kitchen tools of practicality, switch is pushed button, controller module is according to the current signal and leakage current of reception
Signal, the break-make of control relay module, connect circuit loop or disconnecting circuit loop.Key switch is not pressed, that is, is used
The mechanical switch of electric kitchen tools is pressed at family, and electric kitchen tools are also not turned on, can not normal work, only after switch is pushed button, control
Device module processed after judging no electric leakage signal, just sends control signal to relay module, connects electricity according to the signal received
Kitchen tools mechanical switch, electric kitchen tools are just started working.
The utility model further comprises line temperature detection module；The output end of the line temperature detection module with
Controller module is connected；The line temperature detection module is temperature sensor.Because only that when leakage current reaches certain value,
It can just detect, and compared with preset value, then judge whether to leak electricity.And in fact, some leakage current very littles, control
Device module processed can not temporarily detect and judge whether leak electricity, now can be to pass through the temperature that temperature sensor detects circuit
Degree, is judged whether to leak electricity by controller module according to the temperature of circuit.When line temperature is higher by preset value, controller module leads to
Cross relay module and disconnect electric kitchen tools switch, cut-off loop, electric kitchen tools are stopped.The detection of leakage current and line temperature
Detection is carried out simultaneously, whichever numerical exception, and controller can control electric kitchen tools mechanical switch to power off, and leaky is provided
Double check, there is provided duplicate protection, further improve creepage protection function.
The course of work of the present utility model is：
User uses electric kitchen tools, pushes button switch, and zero sequence current mutual inductor starts to receive outside civil power, will after processing
Leakage current signal is inputted into signal processing module, and input is into controller module after amplified and analog-to-digital conversion, when not depositing
In leakage current, controller module sends control instruction to relay module, connects electric kitchen tools mechanical switch, electric kitchen tools start work
Make, during electric kitchen tools use, leakage current be present, controller module sends control instruction to relay module, disconnects electricity
Kitchen tools mechanical switch；Current detection module detects circuital current, and current signal is inputted into controller module, and electric kitchen tools are just
Often during work, current signal is nonzero value, when electric kitchen tools are stopped because of other reasons, current detection module output null value,
Controller module understands that control relay module disconnects electric kitchen tools switch, protection circuit；Line temperature detection module detects in real time
Line temperature, leaking electricity, and controller module can be not yet judged according to leakage current in the case of electric leakage being present, control
Device module judges whether to leak electricity according to line temperature, when line temperature exceeds preset value, controller module control immediately after
Electrical appliance module disconnects electric kitchen tools switch, and otherwise controller module does not send signal.
Computer program involved by the utility model is existing, known program, is not improved.
Claims (5)
1. detection and protection apparatus for leakage, including electric kitchen tools mechanical switch, electric kitchen tools electrothermal tube and electric hot tray, the electric kitchen tools machine
During tool switch closure, the electric kitchen tools electrothermal tube conducting, electric hot tray heating, it is characterised in that：
Also include zero sequence current mutual inductor, signal processing module, current detection module, controller module, relay module and
Key switch；
The zero sequence current mutual inductor receives the output signal of outside civil power, the output end all the way of the zero sequence current mutual inductor with
The input connection of current detection module, the another way output end of the zero sequence current mutual inductor and the input of signal processing module
End is connected, and the another road output end of the zero sequence current mutual inductor is connected with the input of relay module, the zero-sequence current
Another road output end of transformer is connected with electric kitchen tools electrothermal tube；The output end of the current detection module and controller module phase
Even；The output end of the signal processor module is connected with controller module；The control terminal and controller of the relay module
Module is connected, and the output end of the relay module is connected with the control terminal of electric kitchen tools mechanical switch；The key switch it is defeated
Go out end with controller module to be connected.
2. detection and protection apparatus for leakage according to claim 1, it is characterised in that：
Further comprise line temperature detection module；The output end of the line temperature detection module is connected with controller module.
3. detection and protection apparatus for leakage according to claim 1, it is characterised in that：
The signal processing module includes signal amplification submodule and analog-to-digital conversion submodule；
The input of the signal amplification submodule is connected with the another way output end of zero sequence current mutual inductor；The signal amplification
The output end of submodule is connected with the input of analog-to-digital conversion submodule；The output end and controller of the analog-to-digital conversion submodule
Module is connected.
4. detection and protection apparatus for leakage according to claim 2, it is characterised in that：The line temperature detection module is temperature
Spend sensor.
5. detection and protection apparatus for leakage according to claim 1, it is characterised in that：
The zero sequence current mutual inductor includes annular core, first winding and secondary winding；The annular core is by sheet metal coil
System forms；The first winding is current carrying conductor, through annular core madial wall；The secondary winding uniform winding is in annular iron
Core lateral wall, the output signal of the secondary winding are exported to controller module through signal processing module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720367865.0U CN206697915U (en) | 2017-04-10 | 2017-04-10 | Detection and protection apparatus for leakage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720367865.0U CN206697915U (en) | 2017-04-10 | 2017-04-10 | Detection and protection apparatus for leakage |
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| Publication Number | Publication Date |
|---|---|
| CN206697915U true CN206697915U (en) | 2017-12-01 |
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ID=60441761
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720367865.0U Expired - Fee Related CN206697915U (en) | 2017-04-10 | 2017-04-10 | Detection and protection apparatus for leakage |
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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 |
-
2017
- 2017-04-10 CN CN201720367865.0U patent/CN206697915U/en not_active Expired - Fee Related
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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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171201 Termination date: 20210410 |