CN2092827U - Safety device being able to auto-recovering power supply - Google Patents
Safety device being able to auto-recovering power supply Download PDFInfo
- Publication number
- CN2092827U CN2092827U CN 91214733 CN91214733U CN2092827U CN 2092827 U CN2092827 U CN 2092827U CN 91214733 CN91214733 CN 91214733 CN 91214733 U CN91214733 U CN 91214733U CN 2092827 U CN2092827 U CN 2092827U
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- China
- Prior art keywords
- power supply
- utility
- resistance
- model
- fuse
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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model relates to an anti-surge safety device capable of auntomatically recovering power supply, using a resistor to replace a fuse to play the functions of current limiting and power-off safety. Compared with the fuse, the utility model has long lifetime and safety, preventing transient overvoltage and surge current, and protecting electric appliance from impact damage; after power-off protection, the utility model debug failures; when load is normal, the utility model automatically recovers the power supply.
Description
The utility model belongs to the protector that uses in the power supply circuits.
Widely used protector in the present various power supply circuits, be by fuse by the time heating fusing of big electric current, circuit disconnected and play safety effect.Such protector has following shortcoming: the one, because the fuse melted by heat is a slow process, response time is slow, many electrical equipment and electronic component be just injured or damage before blown fuse, surge voltage and surge current particularly occur when (can exceed normal voltage and electric current several times).The 2nd, after the blown fuse, changing-over fuse or protector are very inconvenient again.The 3rd, be difficult to change the fuse or the protector of same specification under many families and the many electricity consumption occasions, even directly change copper, aluminium, iron wire etc. to replace fuse (it is very general that this phenomenon is actually), such protector performs practically no function, accident and loss happen occasionally, and be very harmful to safety utilization of electric power.The 4th, the present porcelain box protector that generally uses, not only volume is big, heavy, and use with the passing of time oxidation corrosion or cause loose contact (contact position resistance heightens and generates heat, strikes sparks) because of workmanship is not good or open circuit, can not guarantee normal power supply even work the mischief and lose.People in all sorts of ways and overcome above-mentioned shortcoming, but the circuit complexity, cost an arm and a leg, and result of use and useful life are all very limited, thereby can not widely use.
Task of the present utility model be to overcome the deficiency of prior art and design that a kind of safe and reliable, easy to use, life-span length, surge protection, response time are fast, automatic recovery of power supply, little, in light weight, the practical insurance circuit device of volume.
This insurance circuit device replaces fuse by resistor, uses piezo-resistance R
1With thermistor R
2Form.(ACVA is DCVA) through piezo-resistance R for supply voltage, electric current
1Absorb instantaneous overvoltage and surge current, again by thermistor R
2Deliver to electrical appliance after the current limliting.So just overcome the harm of instantaneous overvoltage and surge current to electrical equipment; When circuit load surpassed permissible value or short trouble occurs, thermistor was cut off the electricity supply automatically, plays the effect of fuse; Get rid of load restoration just often when fault, recover normal power supply again voluntarily.This process can repeat up to ten thousand times to hundreds of thousands.
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is circuit theory diagrams of the present utility model;
Fig. 2 is circuit element installation printed circuit domain of the present utility model.
With reference to Fig. 1, power input meets piezo-resistance R1, be used for preventing that instantaneous surge voltage and surge current are to thermistor R2And the impact of electrical equipment harm. R2Be thermistor, directly replace the function of fuse, and the function that restores electricity voluntarily after having fault to get rid of.
With reference to Fig. 2, the utility model can be installed in the box, and its shape can change as required, and arbitrariness is arranged, as doing rectangularity, square or polygon etc. Whatsoever shape needs only and connects respectively electric power incoming line and lead-out terminal or lead-in wire.
Embodiment of the present utility model such as Fig. 1, R
1Be 471K type Zno piezo-resistance, R
2Be MZ13-250Y type temperature-sensitive current-limiting resistance.Change R
1And R
2Model and specification, amount of capacity, can satisfy the requirement of multiple different output power and anti overvoltage.For example increase the capacity of piezo-resistance, can design the anti-surge protector that seals in the thunderbolt voltage and current of circuit.
Claims (4)
1, a kind of antisurge automatic recovery of power supply protector, it is characterized in that its use resistor replaces fuse to play the safety effect of current limliting, outage, and have the ability of anti-instantaneous overvoltage and surge current and the ability of automatic recovery of power supply, in this protector, be connected to the resistance R of anti-instantaneous overvoltage and surge current
1With the resistance R that plays current limliting outage effect
2
2, insurance circuit device according to claim 1, the resistance that it is characterized in that anti-instantaneous overvoltage and surge current is piezo-resistance.
3, insurance circuit device according to claim 1 is characterized in that anti-overladen resistance is thermistor.
4, insurance circuit device according to claim 1 is characterized in that external form can make arbitrary shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91214733 CN2092827U (en) | 1991-07-17 | 1991-07-17 | Safety device being able to auto-recovering power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91214733 CN2092827U (en) | 1991-07-17 | 1991-07-17 | Safety device being able to auto-recovering power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2092827U true CN2092827U (en) | 1992-01-08 |
Family
ID=4922898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91214733 Withdrawn CN2092827U (en) | 1991-07-17 | 1991-07-17 | Safety device being able to auto-recovering power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2092827U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1047036C (en) * | 1996-12-26 | 1999-12-01 | 浙江大学 | Short-circuit protection circuit |
-
1991
- 1991-07-17 CN CN 91214733 patent/CN2092827U/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1047036C (en) * | 1996-12-26 | 1999-12-01 | 浙江大学 | Short-circuit protection circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |