CN201352654Y - Power plug of electric water heater with dual protection function - Google Patents
Power plug of electric water heater with dual protection function Download PDFInfo
- Publication number
- CN201352654Y CN201352654Y CNU2009201134826U CN200920113482U CN201352654Y CN 201352654 Y CN201352654 Y CN 201352654Y CN U2009201134826 U CNU2009201134826 U CN U2009201134826U CN 200920113482 U CN200920113482 U CN 200920113482U CN 201352654 Y CN201352654 Y CN 201352654Y
- Authority
- CN
- China
- Prior art keywords
- zero line
- input
- ground wire
- live wire
- chip microcomputer
- Prior art date
- 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 - Fee Related
Links
Images
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
A power plug of an electric water heater with dual protection function consists of an electric potential difference detecting device for a ground wire and a zero line, a current difference detecting device for a live wire and the zero line, and a self-checking circuit which are respectively connected with an I/O input terminal of a singlechip. Three I/O output terminals of the singlechip are respectively connected with three relays by a triode and a photocoupler, and normally-closed contacts of the relays are respectively connected with input and output terminals of the live wire, input and output terminals of the ground wire and input and output terminals of the zero line. The beneficial effects are as follows: the singlechip detects the signals of the electric potential difference detecting device for the ground wire and the zero line and the current difference detecting device for the live wire and the zero line; and when an electric heating tube is basically insulated, and simultaneously the ground wire fails and the electric heating tube drains, a control circuit cuts off and controls the live wire, the ground wire and the zero line at real time, therefore, the personnel safety of a user is protected under the condition of imperfect grounding environment. The self-checking circuit has the functions of simulating electrical signal detection and reset. The device adopts the photocoupler, thus having good isolation effect to input electrical signals and output electrical signals.
Description
Technical field
The utility model relates to a kind of attaching plug, particularly a kind of electric heater attaching plug with double protection functions.
Background technology
The prior art electric heater does not have the electric heater of double protection functions attaching plug is arranged; can not be provided at when electric heating tube basic insulation and ground wire lose efficacy simultaneously and electric heating tube leaks electricity live wire, ground wire and zero line were controlled in real time, and make the personal safety of user under the imperfect earth environment can not get protection.Single live wire leakage protecting plug can't carry out mandatory protection to ground wire electrification.
Summary of the invention
The purpose of this utility model provides a kind of electric heater attaching plug with double-electric protection function.
The technical scheme that its technical problem that solves the utility model adopts is: cross-over connection is connected with the I/O input of single-chip microcomputer respectively with self-checking circuit with potential difference detecting device, live wire and neutral line current device for detecting difference between zero line in ground wire.Potential difference detecting device between ground wire and zero line is connected to form successively by transformer, rectification circuit, triode, photoelectrical coupler, the primary coil of transformer is connected with zero line with the ground wire of power supply, and the output of photoelectrical coupler is connected with the I/O input of single-chip microcomputer.Live wire and neutral line current device for detecting difference magnetic ring coil and double operational integrated circuit are formed, and live wire and zero line pass magnetic ring coil, and the output of double operational integrated circuit is connected with the I/O input of single-chip microcomputer.Self-checking circuit is made up of button and resistance, and an end of button is connected with the I/O input of single-chip microcomputer, and is connected other end ground connection with positive source by resistance.Three I/O outputs of single-chip microcomputer are connected with three relays with photoelectrical coupler by triode respectively, and the normally-closed contact of relay is connected with the in-out end of live wire, ground wire and zero line respectively.
The beneficial effects of the utility model are single-chip microcomputer detections to the signal of the potential difference detecting device between ground wire and zero line and live wire and neutral line current device for detecting difference; lost efficacy simultaneously and provided charged signal to control circuit during the electric heating tube electric leakage at electric heating tube basic insulation and ground wire; so that control circuit is controlled in real time to live wire, ground wire and zero line, the personal safety of user under the imperfect earth environment is protected.Self-checking circuit has analog electrical signal and detects and the system reset function.Adopting photoelectrical coupler, is the media transmission signal of telecommunication with light, and input, the output signal of telecommunication are had the good isolation effect.
Description of drawings
The utility model is described in further detail below by accompanying drawing.
Accompanying drawing 1 is an electrical schematic diagram of the present utility model.
Embodiment
Consult Fig. 1.The utility model single-chip microcomputer model is: PIC16C54.
Cross-over connection is connected with the I/O input of single-chip microcomputer respectively with self-checking circuit with potential difference detecting device, live wire and neutral line current device for detecting difference between zero line in ground wire.Potential difference detecting device between ground wire and zero line is connected to form successively by transformer T, rectification circuit D1-D4, triode G1, photoelectrical coupler GN1, the primary coil of transformer is connected with zero line N with the ground wire E of power supply, and the output of photoelectrical coupler is connected with the I/O input of single-chip microcomputer.Live wire and neutral line current device for detecting difference magnetic ring coil L and double operational integrated circuit LM358 form, and live wire L and zero line N pass magnetic ring coil, and the output of double operational integrated circuit is connected with the I/O input of single-chip microcomputer.Self-checking circuit is made up of button K and resistance R, and the end of button K is connected with the I/O input of single-chip microcomputer, and is connected other end ground connection with positive source by resistance R.Three I/O outputs of single-chip microcomputer are connected with three relay J 1, J2, J3 by triode G2, G3, G4 and photoelectrical coupler GN2, GN3, GN4 respectively, and the normally-closed contact of relay is connected with the in-out end of zero line N with live wire L, ground wire E respectively.
Claims (4)
1, a kind of electric heater attaching plug with double-electric protection function; it is characterized in that forming with self-checking circuit with potential difference detecting device, live wire and neutral line current device for detecting difference between zero line and being connected with the I/O input of single-chip microcomputer respectively in ground wire by cross-over connection; three I/O outputs of single-chip microcomputer are connected with three relays with photoelectrical coupler by triode respectively, and the normally-closed contact of relay is connected with the in-out end of live wire, ground wire and zero line respectively.
2, a kind of electric heater attaching plug according to claim 1 with double-electric protection function; it is characterized in that the potential difference detecting device between ground wire and zero line is connected to form successively by transformer, rectification circuit, triode, photoelectrical coupler; the primary coil of transformer is connected with zero line with the ground wire of power supply, and the output of photoelectrical coupler is connected with the I/O input of single-chip microcomputer.
3, a kind of electric heater attaching plug according to claim 1 with double-electric protection function; it is characterized in that live wire and neutral line current device for detecting difference magnetic ring coil and double operational integrated circuit composition; live wire and zero line pass magnetic ring coil, and the output of double operational integrated circuit is connected with the I/O input of single-chip microcomputer.
4, a kind of electric heater attaching plug according to claim 1 with double-electric protection function; it is characterized in that self-checking circuit is made up of button and resistance; one end of button is connected with the I/O input of single-chip microcomputer, and is connected other end ground connection with positive source by resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201134826U CN201352654Y (en) | 2009-02-01 | 2009-02-01 | Power plug of electric water heater with dual protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201134826U CN201352654Y (en) | 2009-02-01 | 2009-02-01 | Power plug of electric water heater with dual protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201352654Y true CN201352654Y (en) | 2009-11-25 |
Family
ID=41376040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009201134826U Expired - Fee Related CN201352654Y (en) | 2009-02-01 | 2009-02-01 | Power plug of electric water heater with dual protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201352654Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871749A (en) * | 2010-05-31 | 2010-10-27 | 攀钢集团冶金工程技术有限公司 | Remote control digital cold firework igniting system |
| CN111722101A (en) * | 2020-05-29 | 2020-09-29 | 宁波三星医疗电气股份有限公司 | Detection circuit and protection method of double-loop relay |
-
2009
- 2009-02-01 CN CNU2009201134826U patent/CN201352654Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871749A (en) * | 2010-05-31 | 2010-10-27 | 攀钢集团冶金工程技术有限公司 | Remote control digital cold firework igniting system |
| CN111722101A (en) * | 2020-05-29 | 2020-09-29 | 宁波三星医疗电气股份有限公司 | Detection circuit and protection method of double-loop relay |
| CN111722101B (en) * | 2020-05-29 | 2023-09-01 | 宁波三星医疗电气股份有限公司 | Detection circuit and protection method of double-loop relay |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205863578U (en) | A kind of electric car conduction chargeable connection device | |
| CN205029123U (en) | Power -off protection socket | |
| CN103219702A (en) | Electric leakage detection protection circuit capable of performing timed self-detection | |
| CN201352654Y (en) | Power plug of electric water heater with dual protection function | |
| CN103427394A (en) | Mining flame-proof type selective leakage protector | |
| CN202940463U (en) | Power-supply switching box | |
| CN103887660B (en) | The leakage protecting plug that three poles and two poles can switch mutually | |
| CN201352246Y (en) | Binary detection device for electrification signals of electric water heater | |
| CN201504086U (en) | Water heater leakage current detection circuit | |
| CN203826704U (en) | Tripolar-and-dipolar mutually switchable earth leakage protection plug | |
| CN201663360U (en) | Switch cabinet intelligent measurement and control instrument | |
| CN201504087U (en) | Water heater leakage voltage detection circuit | |
| CN212343315U (en) | Protective switch | |
| CN203895721U (en) | Data line with automatic power-off function | |
| CN204144168U (en) | Magneto many-contact relay | |
| CN203799488U (en) | Household digital intelligent distribution box | |
| CN203300900U (en) | Leakage protection plug | |
| CN207920820U (en) | Middle pump house motor start stop operation remote control system | |
| CN202206133U (en) | Lightning protection isolator for direct-to-home signal line and power socket with same | |
| CN205194630U (en) | Circuit breaker with detect feedback and remote control and divide disconnected function | |
| CN201122747Y (en) | Insulation type danger-proof protection switch plug | |
| CN204491281U (en) | Electric iron has a power failure calling protection circuit again | |
| CN201174466Y (en) | General-purpose electric appliance diad anti-electricity plug with dual selection functions | |
| CN203747258U (en) | Intelligent integrated power distribution protection box | |
| CN211182804U (en) | Grounding protection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091125 Termination date: 20100201 |