CN206258541U - A kind of water heater electric-leakage detection circuit - Google Patents
A kind of water heater electric-leakage detection circuit Download PDFInfo
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- CN206258541U CN206258541U CN201621372466.5U CN201621372466U CN206258541U CN 206258541 U CN206258541 U CN 206258541U CN 201621372466 U CN201621372466 U CN 201621372466U CN 206258541 U CN206258541 U CN 206258541U
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Abstract
The utility model discloses a kind of water heater electric-leakage detection circuit, including live wire and zero line, the live wire and zero line constitute the primary coil of output electric leakage signal through a toroidal core L201, electric capacity C102, resistance R101 and resistance R102 are parallel between the live wire and zero line, the electric capacity C102 and resistance R101 are connected with the first interface of chip U101, and resistance R102 is connected with the second interface of chip U101；The primary coil is also circumscribed with electric capacity C101, and electric capacity C101 is connected with one end of electric capacity C104, and the other end of electric capacity C104 is connected with the 4th interface of chip U101 and the 5th interface respectively；3rd interfacing ground of the chip U101, the 6th interface of chip U101 is connected with one end of electric capacity C103, and the 7th interface of chip U101 is connected with the other end of electric capacity C103.
Description
Technical field
The utility model is related to detection circuit field, specifically, is related specifically to a kind of water heater electric-leakage detection circuit.
Background technology
Water heater refers to just, by various physical principles, cold water temperature is raised the one kind for becoming hot water within a certain period of time
Device.Existing water heater in use, easily because the factors such as plastics occur leak electricity, so as to jeopardize the person of user of service
Safety.
Utility model content
The purpose of this utility model is for deficiency of the prior art, there is provided a kind of water heater electric-leakage detection circuit,
To solve problems of the prior art.
The technical problem that the utility model is solved can be realized using following technical scheme：
A kind of water heater electric-leakage detection circuit, including live wire and zero line, the live wire and zero line pass through a toroidal core
L201 constitute output electric leakage signal primary coil, be parallel between the live wire and zero line electric capacity C102, resistance R101 and
Resistance R102, the electric capacity C102 and resistance R101 are connected with the first interface of chip U101, resistance R102 and chip U101's
Second interface is connected；
The primary coil is also circumscribed with electric capacity C101, and electric capacity C101 is connected with one end of electric capacity C104, electric capacity C104's
The other end is connected with the 4th interface of chip U101 and the 5th interface respectively；3rd interfacing ground of the chip U101, chip
6th interface of U101 is connected with one end of electric capacity C103, and the 7th interface of chip U101 is connected with the other end of electric capacity C103.
Compared with prior art, the beneficial effects of the utility model are as follows：
It is secondary as the primary coil of electric leakage mutual inductor by using live wire and zero line also cross ring type magnetic core
The mode of coil output electric leakage signal detects whether water heater leaks electricity.
Brief description of the drawings
Fig. 1 is the schematic diagram of water heater electric-leakage detection circuit described in the utility model.
Specific embodiment
For technological means, creation characteristic, reached purpose and effect for realizing the utility model are easy to understand, below
With reference to specific embodiment, the utility model is expanded on further.
Referring to Fig. 1, a kind of water heater electric-leakage detection circuit described in the utility model, including live wire and zero line, the fire
Line and zero line constitute the primary coil of output electric leakage signal through a toroidal core L201, in parallel between the live wire and zero line
There are electric capacity C102, resistance R101 and resistance R102, the electric capacity C102 and resistance R101 are connected with the first interface of chip U101,
Resistance R102 is connected with the second interface of chip U101；
The primary coil is also circumscribed with electric capacity C101, and electric capacity C101 is connected with one end of electric capacity C104, electric capacity C104's
The other end is connected with the 4th interface of chip U101 and the 5th interface respectively；3rd interfacing ground of the chip U101, chip
6th interface of U101 is connected with one end of electric capacity C103, and the 7th interface of chip U101 is connected with the other end of electric capacity C103.
Current transformer detection electric leakage, secondary coil is exported as the input of difference amplifier, outside difference amplifier and
Connect electric capacity and be combined and amplify signal, be connected in parallel to the input of latch circuit.Before input voltage reaches setting, breech lock electricity
Road is always maintained at low level, when leakage current exceeds permissible value, exports high level.
The numerical value of C101, C103, C104, R102 is recommended parameter in Fig. 1.Adjustment R101 can make the minimum permission voltage of electric leakage
Reach the cut-in voltage of IC.Circuit is simple, as long as detect high level to think to leak electricity.
Operation principle of the present utility model is as follows：
By live wire and zero line also cross ring type magnetic core, as the primary coil of electric leakage mutual inductor, secondary coil output
Electric leakage signal.When without electric leakage when, flow through the size of current equal direction of electromagnetism ring conversely, formed magnetic field cancel out each other, it is secondary
Without electric leakage signal, when there is leakage current, due to flowing through the current imbalance of magnet ring, then secondary coil is induced level coil
Electric leakage signal, amplified device amplifies, then is changed into the signal that chip can be recognized, chip receives electric leakage signal and then stops heating guarantor
Temperature and keyboard operation, terminate engineering process and send alarm signal, power supply indicator flash caution, continuous toot the sound of buzzer.
General principle of the present utility model and principal character and advantage of the present utility model has been shown and described above.One's own profession
The technical staff of industry it should be appreciated that the utility model is not restricted to the described embodiments, described in above-described embodiment and specification
Simply illustrate principle of the present utility model, on the premise of the utility model spirit and scope are not departed from, the utility model is also
Various changes and modifications are had, these changes and improvements are both fallen within the range of claimed the utility model.The utility model
Claimed scope is by appending claims and its equivalent thereof.
Claims (1)
1. a kind of water heater electric-leakage detection circuit, it is characterised in that：Including live wire and zero line, the live wire and zero line pass through a ring
Shape magnetic core L201 constitutes the primary coil of output electric leakage signal, and electric capacity C102, resistance are parallel between the live wire and zero line
R101 and resistance R102, the electric capacity C102 and resistance R101 are connected with the first interface of chip U101, resistance R102 and chip
The second interface connection of U101；
The primary coil is also circumscribed with electric capacity C101, and electric capacity C101 is connected with one end of electric capacity C104, and electric capacity C104's is another
End is connected with the 4th interface of chip U101 and the 5th interface respectively；3rd interfacing ground of the chip U101, chip U101
The 6th interface be connected with one end of electric capacity C103, the 7th interface of chip U101 is connected with the other end of electric capacity C103.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621372466.5U CN206258541U (en) | 2016-12-14 | 2016-12-14 | A kind of water heater electric-leakage detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621372466.5U CN206258541U (en) | 2016-12-14 | 2016-12-14 | A kind of water heater electric-leakage detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206258541U true CN206258541U (en) | 2017-06-16 |
Family
ID=59028280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621372466.5U Expired - Fee Related CN206258541U (en) | 2016-12-14 | 2016-12-14 | A kind of water heater electric-leakage detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206258541U (en) |
-
2016
- 2016-12-14 CN CN201621372466.5U patent/CN206258541U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20170616 Termination date: 20191214 |