CN1553552A - Over voltage breaking protector - Google Patents
Over voltage breaking protector Download PDFInfo
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- CN1553552A CN1553552A CNA031289568A CN03128956A CN1553552A CN 1553552 A CN1553552 A CN 1553552A CN A031289568 A CNA031289568 A CN A031289568A CN 03128956 A CN03128956 A CN 03128956A CN 1553552 A CN1553552 A CN 1553552A
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- sensitive layer
- heat
- transition temperature
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- piezo
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Abstract
The invention relates to modifying structure of overvoltage open circuit protector. The protector includes varistor layer, electrode connected, and temperature sensing layer and output lead. The said temperature-sensing layer sets up outside varistor layer combining the two layers as an integrated layer. The invention possesses features of simple structure, easy production, low cost, good performance of overvoltage protection and long service life. The invention is suitable for fabricating productions of overvoltage protection in different specifications.
Description
Technical field
The present invention relates to a kind of over-pressure safety device, especially relate to a kind of structural improvement piezo-resistance formula overvoltage broken circuit protecting equipment.
Background technology
At present in the over-pressure safety device product that use in market; related to various protection structures; wherein a kind of " PTC arc-extinction device "; be used to eliminate the electric arc that may between switch contact, produce when electric current changes; comprise and the induction by current unit of switch polyphone and the control switch of controlling by this sensing unit; also comprise the series arm that comprises control switch, PTC element and branch current sensing unit, this series arm is connected across the series loop two ends of sensing unit and switch.This PTC arc-extinction device has advantages such as cost is low, extinguishing arc is effective, dependable performance.And another kind of " high energy ZnO varistor ", comprise folded ZnO resistors string, binding post and the elastic sheet rubber of string successively that is clamped between busbar and the insulating press boards, also comprise sealing arc extinguishing cover, sealing arc extinguishing cover is made of the folded institute of ceramic jacket and the high-temperature resistant rubber sealing ring string that is located at its two; Sealing arc extinguishing cover is sealed in the inner extending end and the elastic sheet rubber of described ZnO resistors string, binding post between busbar and the insulating press boards, can prevent the erosion of moisture to the ZnO resistors string, can stop scurrying out of electric arc again.Also having such as " PTC circuit protection device " of other, its principle is that the electrode of a plurality of holes contacts with the coated surfaces of PTC element, and heats to form a laminate in pressurization.Then this laminate is further formed a plurality of PTC circuit protection devices.
Whether though above-mentioned many over-pressure safety device products have advantage separately, its structure is comparatively complicated, the cost height, be exactly practicality a little less than, useful life is not long, takes normal replacing, thus to using and production causes trouble and inconvenience.
Summary of the invention
The present invention solves the existing in prior technology complex structure, unstable properties, the technical problem that useful life is short etc.Meanwhile, the present invention also provides a kind of economy, good stability, can be automatically with the overvoltage failure of current, and recover the overvoltage breaker protector of normal power supply automatically.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals: comprise the piezo-resistance layer and be attached thereto the electrode that connects, it is characterized in that in the arranged outside of described piezo-resistance layer heat-sensitive layer being arranged, be provided with output lead therebetween.Because the present invention has carried out scientific design to the product internal structure, is provided with heat-sensitive layer in the outside of piezo-resistance layer dexterously, and both are combined into one, and reaches aforementioned goal of the invention.
As preferably, be provided with screen between described piezo-resistance layer and the heat-sensitive layer and protect heat-sensitive layer; And protect and be provided with the metal level that joins with output lead between the heat-sensitive layer at described heat-sensitive layer and screen.Make piezo-resistance layer thermally equivalent like this, prevent piezo-resistance layer partial breakdown and cause whole the damage, further obviously prolonged useful life.
As preferably, described heat-sensitive layer or screen protect the both sides that heat-sensitive layer is symmetrically distributed in the piezo-resistance layer, and described input lead is connected in described heat-sensitive layer.
As preferably, described piezo-resistance layer adopts zinc oxide material to make; And the transition temperature T of described heat-sensitive layer
2Be lower than the transition temperature T that screen protects heat-sensitive layer
1
As one of selection, described screen protects the ptc material formation that temperature-sensitive series of strata employing average thickness is 0.1mm-0.5mm, described transition temperature T
1It is 140 ℃-165 ℃.Thin screen protects heat-sensitive layer and can reduce its thermal capacity, improves its sensitivity.
Simultaneously, as concrete selection, it is the ptc material formation of 0.5mm-3.5mm that described heat-sensitive layer also can adopt average thickness, described transition temperature T
2It is 90 ℃-110 ℃.
Transition temperature T
1With transition temperature T
1Can decide according to the concrete needs of product; The then demands of considering the aspects such as sensitivity of properties of product stability and reflection of both thickness degree and proportionate relationship thereof more.In addition, also can produce the product of different capacity, specifications and models by changing parameters such as zinc oxide material and sectional area thereof.
Characteristics such as therefore, the present invention has simple and reasonable for structure, and it is comparatively convenient to make, and production cost is comparatively cheap, and overvoltage protective property is superior, and useful life is long.Can be directly installed on wiring board and electronic installation front, the protection electronic installation is unlikely to overvoltage and overcurrent damages.Because the PTC semiconductor layer is directly connected with circuit, thereby the function of overcurrent protection is arranged, applicable to the overvoltage protection product of making different size.
Description of drawings
Accompanying drawing 1 is a kind of structural representation sketch of the present invention.
Embodiment
Below by embodiment, and in conjunction with the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment: piezo-resistance layer 1 adopts zinc oxide material to constitute, and its rated voltage is 220V; Be respectively arranged with screen in its two outside and protect heat-sensitive layer 2 and heat-sensitive layer 3, and be provided with the metal level that joins with output lead 6 between the heat-sensitive layer 2 with shielding to protect at heat-sensitive layer 3.Wherein, described screen protects the ptc material formation that temperature-sensitive series of strata employing thickness is 0.2mm, its transition temperature T
1It is 150 ℃; It is the ptc material formation of 1.0mm that described temperature-sensitive series of strata adopt thickness, its transition temperature T
2It is 100 ℃.Heat-sensitive layer or screen protect the both sides that heat-sensitive layer is symmetrically distributed in piezo-resistance layer 1, and output lead 6 is connected in heat-sensitive layer 3; Input lead 4 is connected to the metal level 5 that screen protects heat-sensitive layer 2 outsides.Above-mentioned inside is provided with can protect the piezo-resistance layer destruction that the part can not be become when TRANSIENT HIGH TEMPERATURE, helps improving whole service life of the present invention.
When the two poles of the earth input voltage surpassed setting voltage (for example 260V), certain point in the piezo-resistance layer 1 that is made of zinc oxide material was breakdown, causes increasing rapidly at the electric current at this place, this temperature is risen, when this temperature surpasses transition temperature T rapidly
1The time, the screen that is made of ptc material protects heat-sensitive layer 2 and produces blocking-up at this place, and the point around making is breakdown thereupon, and such process makes screen protect that the bulk temperature of heat-sensitive layer 2 is instantaneous to reach 150 ℃ constantly repeatedly, and screen protects the temperature of heat-sensitive layer 2 to transition temperature T simultaneously
2Be 100 ℃ heat-sensitive layer 3 diffusions, make the temperature of heat-sensitive layer 3 surpass 100 ℃, input voltage is cut off, then load in have very low voltage if output lead 6 is connected to load this moment, has very little electric current to pass through, this electric current will be kept screen and protect heat-sensitive layer 2 heatings, make it to remain near the transition temperature; If 6 of output leads do not connect load or 4 voltages of input lead cut off, then owing to the thermolysis of device itself, automatic processing circuit after 1-2 minute leads to again and go up power supply this moment, then is connected to the load restoration operate as normal on the output lead 6.
When two pole tensions surpass setting voltage once more, repeat said process at once automatically.Like this, even when load appliance uses in the power supply of spread of voltage, the input voltage at its two ends can not surpass setting voltage, and the protection load appliance is not damaged.
Claims (10)
1. an overvoltage breaker protector comprises the piezo-resistance layer and is attached thereto the electrode that connects, and it is characterized in that in the arranged outside of described piezo-resistance layer (1) heat-sensitive layer (3) being arranged, and is provided with output lead (4) therebetween.
2. overvoltage breaker protector according to claim 1 is characterized in that being being provided with between described piezo-resistance layer (1) and the heat-sensitive layer (3) screen and protects heat-sensitive layer (2); And protect at described heat-sensitive layer (3) and screen and to be provided with the metal level that joins with output lead (4) between the heat-sensitive layer (2).
3. overvoltage breaker protector according to claim 1 and 2 is characterized in that being that described heat-sensitive layer (3) or screen protect the both sides that heat-sensitive layer (2) is symmetrically distributed in piezo-resistance layer (1), and described input lead is connected in described heat-sensitive layer (3).
4. overvoltage breaker protector according to claim 1 and 2 is characterized in that being that described piezo-resistance layer (1) adopts zinc oxide material to make; And the transition temperature T of described heat-sensitive layer (3)
2Be lower than the transition temperature T that screen protects heat-sensitive layer (2)
1
5. overvoltage breaker protector according to claim 3 is characterized in that being that described piezo-resistance layer (1) adopts zinc oxide material to make; And the transition temperature T of described heat-sensitive layer (3)
2Be lower than the transition temperature T that screen protects heat-sensitive layer (2)
1
6. overvoltage breaker protector according to claim 1 and 2 is characterized in that being that it is that the employing average thickness is the ptc material formation of 0.1mm-0.5mm that described screen protects heat-sensitive layer (2), described transition temperature T
1It is 140 ℃-165 ℃.
7. overvoltage breaker protector according to claim 3 is characterized in that being that it is that the employing average thickness is the ptc material formation of 0.1mm-0.5mm that described screen protects heat-sensitive layer (2), described transition temperature T
1It is 140 ℃-165 ℃.
8. overvoltage breaker protector according to claim 1 and 2 is characterized in that being that described heat-sensitive layer (3) is that the employing average thickness is the ptc material formation of 0.5mm-3.5mm, described transition temperature T
2It is 90 ℃-110 ℃.
9. overvoltage breaker protector according to claim 3 is characterized in that being that described heat-sensitive layer (3) is that the employing average thickness is the ptc material formation of 0.5mm-3.5mm, described transition temperature T
2It is 90 ℃-110 ℃.
10. overvoltage breaker protector according to claim 4 is characterized in that being that described heat-sensitive layer (3) is that the employing average thickness is the ptc material formation of 0.5mm-3.5mm, described transition temperature T
2It is 90 ℃-110 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031289568A CN100452609C (en) | 2003-05-27 | 2003-05-27 | Over voltage breaking protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031289568A CN100452609C (en) | 2003-05-27 | 2003-05-27 | Over voltage breaking protector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1553552A true CN1553552A (en) | 2004-12-08 |
| CN100452609C CN100452609C (en) | 2009-01-14 |
Family
ID=34322318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031289568A Expired - Fee Related CN100452609C (en) | 2003-05-27 | 2003-05-27 | Over voltage breaking protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100452609C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101138054B (en) * | 2005-03-11 | 2011-06-08 | 松下电器产业株式会社 | Multilayer ceramic electronic component |
| CN103632784A (en) * | 2013-11-23 | 2014-03-12 | 华中科技大学 | Lamination sheet-type heat and pressure sensitive composite resistor and preparation method thereof |
| CN105390219A (en) * | 2015-12-14 | 2016-03-09 | 天津凯华绝缘材料股份有限公司 | Component with over-voltage over-current protective effect and manufacturing process of the same |
| CN106992509A (en) * | 2017-05-18 | 2017-07-28 | 中国电力科学研究院 | A kind of laminated bus guide rod and suppressing method for being used to suppress VFTO |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI809273B (en) * | 2020-05-08 | 2023-07-21 | 富致科技股份有限公司 | Composite circuit protection device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3976854A (en) * | 1974-07-31 | 1976-08-24 | Matsushita Electric Industrial Co., Ltd. | Constant-temperature heater |
| JPH06188106A (en) * | 1992-12-18 | 1994-07-08 | Tdk Corp | Arrester with varistor function and protector using the arrester |
| JPH10144506A (en) * | 1996-11-06 | 1998-05-29 | Tdk Corp | Overcurrent/overvoltage protective element |
| US6304166B1 (en) * | 1999-09-22 | 2001-10-16 | Harris Ireland Development Company, Ltd. | Low profile mount for metal oxide varistor package and method |
| CN2627644Y (en) * | 2003-05-27 | 2004-07-21 | 李帮庆 | Overvoltage circuit breaking protector |
-
2003
- 2003-05-27 CN CNB031289568A patent/CN100452609C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101138054B (en) * | 2005-03-11 | 2011-06-08 | 松下电器产业株式会社 | Multilayer ceramic electronic component |
| CN103632784A (en) * | 2013-11-23 | 2014-03-12 | 华中科技大学 | Lamination sheet-type heat and pressure sensitive composite resistor and preparation method thereof |
| CN103632784B (en) * | 2013-11-23 | 2016-04-13 | 华中科技大学 | Quick composite resistor of a kind of lamination sheet type hot pressing and preparation method thereof |
| CN105390219A (en) * | 2015-12-14 | 2016-03-09 | 天津凯华绝缘材料股份有限公司 | Component with over-voltage over-current protective effect and manufacturing process of the same |
| CN106992509A (en) * | 2017-05-18 | 2017-07-28 | 中国电力科学研究院 | A kind of laminated bus guide rod and suppressing method for being used to suppress VFTO |
| CN106992509B (en) * | 2017-05-18 | 2019-04-30 | 中国电力科学研究院 | It is a kind of for inhibiting the laminated bus guide rod and suppressing method of VFTO |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100452609C (en) | 2009-01-14 |
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Granted publication date: 20090114 Termination date: 20100527 |