CN201117979Y - Small power electric appliance fireproofing power socket - Google Patents
Small power electric appliance fireproofing power socket Download PDFInfo
- Publication number
- CN201117979Y CN201117979Y CNU200720014704XU CN200720014704U CN201117979Y CN 201117979 Y CN201117979 Y CN 201117979Y CN U200720014704X U CNU200720014704X U CN U200720014704XU CN 200720014704 U CN200720014704 U CN 200720014704U CN 201117979 Y CN201117979 Y CN 201117979Y
- Authority
- CN
- China
- Prior art keywords
- small
- electrical equipment
- supply socket
- low
- flow restricter
- 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
Abstract
The utility model relates to an electric appliance, in particular to a fireproof power socket for a low-powered electric appliance. Because the input impedances of low-powered and high-powered electric appliances have the same low impedance value, when the electric appliances fail, the low-powered electric appliance cannot restrict failure current; and because the failure current is larger than the low arc-generating current, arcs are generated to cause a fire. In order to resolve the problem, an amperite is cascaded with the lead of the power socket. The amperite can apply a resistor, a capacitor, an inductor, etc. or non-linear elements, such as a thermistance, etc. The fireproof power socket can restrict the failure current of the low-powered electric appliance under 500mA in order to eliminate the conditions of continuously generating arcs and fundamentally prevent fire hazards. Because a large number of low-powered electric appliances are used, the chance of causing fires is high, so resolving the problem is significant for the safety of the lives and properties of people.
Description
Technical field
The utility model relates to a kind of electrical installation, promptly a kind of small-power electrical equipment fire prevention supply socket.
Background technology
Small-power electrical equipment is meant the electrical equipment that 20W is following.At present, happen occasionally, cause at electricity and occupy higher ratio in the fire by the fire of small-power electrical equipment self initiation on fire.Discover, the reason that produces this phenomenon is: existing small-power electrical equipment equally links to each other with the AC network of 220V by supply socket with high-power electric appliance, the link of fault current without limits, thereby the input impedance of small-power electrical equipment and high-power electric appliance all is the same low impedance value, when electrical equipment breaks down, small electric apparatus self can not fault current limiting, and fault current is greater than your pupil's arc current and produce electric arc and cause fire.Requirement according to the electric fireproof act of technique for security, the fault current of small electric apparatus must not be greater than 500mA, (referring to " electrical equipment fire safety technology " 59 pages, the Inner Mongol People's Press, publish in December, 1998, the Chen Nan chief editor), and existing small electric apparatus hereto index do not take effective measures, so small electric apparatus produces electric arc, initiation fire is inevitable.
In order to solve small-power electrical equipment self problem on fire, someone adopts semistor to do from double insurance (to see the article " self-healing fuse that need not change " of Cheong Kuoc Va, be published in 308 pages of " electronic production " bound volumes in 1998), but this can solve insurance back-end circuit problem on fire, problem on fire that can not the guarantee insurance front-end circuit.
Summary of the invention
The purpose of this utility model provides and a kind ofly can prevent small-power electrical equipment self device on fire.
Above-mentioned purpose is realized by following technical scheme, develops a kind of small-power electrical equipment fire prevention supply socket, is characterized in: on the lead-in wire of said supply socket, be in series with flow restricter.
Said flow restricter to the impedance of 50Hz alternating current greater than 470 Ω.
Said flow restricter is a resistance.
Said flow restricter is an electric capacity.
Said flow restricter is an inductor.
Said flow restricter is a thermistor element.
Adopt the small-power electrical equipment fire prevention supply socket of technique scheme, can be limited in the fault current of small-power electrical equipment below the 500mA, thereby eliminate the condition that produces sustained arc, avoid the generation of fire.Because the owning amount of small-power electrical equipment is very big, its economic benefit and social benefit are very considerable.
Description of drawings
Fig. 1 is the circuit diagram of first kind of embodiment;
Fig. 2 is the circuit diagram of second kind of embodiment;
Fig. 3 is the circuit diagram of the third embodiment;
Fig. 4 is the circuit diagram of the 4th kind of embodiment;
Fig. 5 is the circuit diagram of the 5th kind of embodiment.
Among the figure as seen: socket 1, the lead-in wire 2, flow restricter 3.
Embodiment
First kind of embodiment: as shown in Figure 1, flow restricter 3 of series connection on a side of supply socket 1 lead-in wire 2 has promptly been formed and has been prevented small-power electrical equipment self supply socket on fire.This supply socket, its flow restricter 3 and socket 1 should be assembled into an integral body.Will have attaching plug when moving use, wall will have binding post when installing.Its flow restricter can adopt linear devices such as resistance, electric capacity, inductance, also utilizes non-linear devices such as adopting thermistor.
Second kind of embodiment: the flow restricter 3 on this as shown in Figure 2 supply socket lead-in wire 2 is current-limiting resistance R, and the parameter of current-limiting resistance is 5.1K Ω 10W, can use for the following electrical equipment of 1W.When electrical equipment breaks down, can be limited in fault current below the 43mA.
The third embodiment: as shown in Figure 3, make the flow restricter string before socket with the capacitor C of 4.7 μ f500V, its impedance is 678 Ω, can use for the following electrical equipment of 5W.When electrical equipment breaks down, can be limited in 324mA to fault current.The resistance R of a 200K Ω in parallel with capacitor on lead-in wire
2, the discharge resistance R when being capacitor C disengaging power supply
2
The 4th kind of embodiment: as shown in Figure 4, use the inductor L of coefficient of self-inductance 2H to connect with socket, its impedance is 628 Ω, can be the following electric power supply of 8W.When electrical equipment breaks down, can be limited in fault current below the 50mA.
The 5th kind of embodiment: as shown in Figure 5, be that the thermistor PTC of 18M270V makes the limit device and connects with socket, can be the following electric power supply of 20W with the positive temperature coefficient model.The electric current that flows through PTC during normal power supply is less than 90mA, and PTC can not produce big temperature rise, and what present is Low ESR, when electrical equipment generation overcurrent fault, the electric current that flows through PTC increases suddenly, self temperature fast rise, impedance sharply increases, thereby fault current is limited in several milliamperes the order of magnitude.
Claims (9)
1. a small-power electrical equipment fire prevention supply socket is characterized in that: on the lead-in wire of said supply socket, be in series with flow restricter.
2. small-power electrical equipment according to claim 1 fire prevention supply socket is characterized in that: said flow restricter to the impedance of 50Hz alternating current greater than 470 Europe.
3. small-power electrical equipment fire prevention supply socket according to claim 1, it is characterized in that: said flow restricter is a resistance.
4. small-power electrical equipment fire prevention supply socket according to claim 1, it is characterized in that: said flow restricter is an electric capacity.
5. small-power electrical equipment fire prevention supply socket according to claim 1, it is characterized in that: said flow restricter is an inductor.
6. small-power electrical equipment fire prevention supply socket according to claim 1, it is characterized in that: said flow restricter is a thermistor element.
7. small-power electrical equipment fire prevention supply socket according to claim 1, it is characterized in that: flow restricter and socket are connected as a whole.
8. small-power electrical equipment according to claim 7 fire prevention supply socket is characterized in that: the as a whole supply socket that is connected of said flow restricter and socket, and move and install attaching plug when using additional.
9. small-power electrical equipment according to claim 7 fire prevention supply socket is characterized in that: the as a whole supply socket that is connected of said flow restricter and socket is used for installing additional when wall is installed binding post.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720014704XU CN201117979Y (en) | 2007-09-22 | 2007-09-22 | Small power electric appliance fireproofing power socket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720014704XU CN201117979Y (en) | 2007-09-22 | 2007-09-22 | Small power electric appliance fireproofing power socket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201117979Y true CN201117979Y (en) | 2008-09-17 |
Family
ID=39992568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720014704XU Expired - Fee Related CN201117979Y (en) | 2007-09-22 | 2007-09-22 | Small power electric appliance fireproofing power socket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201117979Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102637984A (en) * | 2011-02-09 | 2012-08-15 | 三星电子株式会社 | Plug for DC appliance |
| CN103730784A (en) * | 2014-01-19 | 2014-04-16 | 陆腾蛟 | Socket for eliminating electric spark |
| TWI626801B (en) * | 2016-01-04 | 2018-06-11 | 泰金寶電通股份有限公司 | Sparkless socket |
-
2007
- 2007-09-22 CN CNU200720014704XU patent/CN201117979Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102637984A (en) * | 2011-02-09 | 2012-08-15 | 三星电子株式会社 | Plug for DC appliance |
| CN103730784A (en) * | 2014-01-19 | 2014-04-16 | 陆腾蛟 | Socket for eliminating electric spark |
| CN103730784B (en) * | 2014-01-19 | 2016-12-07 | 国网山东省电力公司日照供电公司 | A kind of socket eliminating electric spark |
| TWI626801B (en) * | 2016-01-04 | 2018-06-11 | 泰金寶電通股份有限公司 | Sparkless socket |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20130293343A1 (en) | Device combining a thermal fuse and a resistor | |
| US20070258175A1 (en) | Method and apparatus for open neutral fault detection | |
| CN201117979Y (en) | Small power electric appliance fireproofing power socket | |
| CN201018518Y (en) | Ethernet power supply overvoltage protector | |
| CN100546142C (en) | A kind of shunted exciter tripping type single-phase short circuit protecting equipment | |
| CN103680992A (en) | Capacitor bank | |
| CN202268696U (en) | Electric wiring protection device for detecting power supply false wiring condition | |
| CN203039363U (en) | Three-phase surge protector | |
| CN201035101Y (en) | Device sending out alarming indication when grounding system appears unconventionality | |
| CN204333922U (en) | A kind of low voltage isolation switch in parallel | |
| CN101046490A (en) | Alarm device for abnormality in earthing system | |
| CN208820453U (en) | A kind of input power cord line disconnection protector | |
| CN205004736U (en) | Self -healing low pressure power capacitor circuit that connects in parallel | |
| CN208638027U (en) | A kind of surging protection circuit | |
| CN205140748U (en) | Self -healing type low -voltage parallel capacitor | |
| CN106099840A (en) | The protection circuit of a kind of power circuit and power circuit | |
| CN205566814U (en) | Be applied to piezo -resistor mounting structure of PCB board | |
| CN202231682U (en) | Household automatic power switch | |
| CN212210966U (en) | Electronic switch circuit and electronic device applying same | |
| CN203244277U (en) | Water dispenser heating control and display circuit | |
| CN202405123U (en) | Safe and long-life lamp capacitor | |
| RU73563U1 (en) | DEVICE FOR REGULATING ELECTRIC POWER CONSUMER ELECTRIC NETWORK | |
| CN202840978U (en) | Rectifier transformer and shell thereof | |
| CN209000763U (en) | A kind of loaded capacity-regulated integrated capacitor | |
| CN206947899U (en) | A kind of bus duct |
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: 20080917 Termination date: 20091022 |