CN204834226U - Novel piezo -resistor - Google Patents
Novel piezo -resistor Download PDFInfo
- Publication number
- CN204834226U CN204834226U CN201520530206.5U CN201520530206U CN204834226U CN 204834226 U CN204834226 U CN 204834226U CN 201520530206 U CN201520530206 U CN 201520530206U CN 204834226 U CN204834226 U CN 204834226U
- Authority
- CN
- China
- Prior art keywords
- piezo
- ntc thermistor
- protection
- resistor
- resistance
- 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.)
- Active
Links
Abstract
The utility model relates to a thermistor especially relates to a novel piezo -resistor, mainly includes: piezo -resistor, NTC thermistor, temperature fuse and insulating layer cover, piezo -resistor, NTC thermistor and temperature fuse electricity are each other connected and are pressed close to, two different temperature fuse electric connection of fusing temperature, piezo -resistor, NTC thermistor, temperature fuse outside is equipped with the insulating layer cover that is used for the protection, the insulating layer cover is formed by the insulating fire -retardant filler of protective sheath embedment, piezo -resistor and NTC thermistor's connected mode is silver thick liquid or soldering, the protection of realization quadruple, its quadruple protection is the protection of NTC thermistor self characteristic respectively, through generate heat indirect break -off signal fuse protection of NTC thermistor under the unreasonable increase situation of electric current, temperature fuse self disconnection protection under the current abnormality increase situation, and when surge current passes through, the protection of piezo -resistor self characteristic to realize the excessive pressure, overflow and overheat protection, ensure electronic equipment and peripheral personal safety as well as the property safety.
Description
Technical field
The utility model relates to a kind of thermistor, particularly relates to a kind of Novel piezoresistor.
Background technology
Thermistor is widely used in the various electronic device power circuit protection field such as all kinds of Switching Power Supply, electronic energy-saving lamp, electric ballast, charger; power circuit produces surge current in the moment of start; easily cause damage to serial connection other electronic products in a power, NTC themistor shields in the case.But self easily damages when running into larger transient voltage; or because fault causes working exceeding under its steady-state current; because of high temperature aging at loading, deterioration loses other electronic product effects of protection to thermistor; the reliable new low point and general insurance silk fuses, causes power circuit to there is certain potential safety hazard.Piezo-resistance is superior performance in suppression surge voltage, is widely used.But piezo-resistance self is fragile; easily be subject to electrical network power-frequency voltage too high and burn short circuit; or the performance degradation by surge current repeat impact; in deterioration with when losing efficacy; often produce a large amount of heats; sometimes even there is the phenomenon of burning, so just need power frequency overvoltage, overcurrent, overtemperature protection measure.
Summary of the invention
The purpose of this utility model is, for the existing state of the art, to provide a kind of Novel piezoresistor.
Thermal property is sent out when this Novel piezoresistor utilizes NTC thermistor increase characteristic and the piezo-resistance suppression surge of temperature rising with electric current or exceeded its maximum permission use voltage; both and Thermal Cutoffs are pressed close to link; three supports mutually; guarantee when voltage, electric current, temperature anomaly raise; cut off the electricity supply, realize maltilevel security protection.
For achieving the above object, the utility model adopts following technical scheme:
A kind of Novel piezoresistor, mainly comprises: piezo-resistance, NTC thermistor, Thermal Cutoffs, and described Thermal Cutoffs, piezo-resistance and NTC thermistor are electrically connected and mutually press close to, and Thermal Cutoffs is at least provided with one.
Further, described piezo-resistance, NTC thermistor and Thermal Cutoffs outside be provided with for the protection of insulating barrier cover.
Further, described insulating barrier cover encapsulating forms.
Further, described insulating barrier cover is formed by the filler of protective sleeve embedding flame-resistant insulation.
Further, described piezo-resistance and the connected mode of NTC thermistor are silver slurry or soldering.
Further, any junction therebetween of described piezo-resistance, NTC thermistor and Thermal Cutoffs can be provided with lead-in wire and draw.
In such scheme, described Thermal Cutoffs quantity is two, and the different Thermal Cutoffs of two fusing-off temperatures is connected in series, the side of the piezo-resistance that Thermal Cutoffs is arranged on or NTC thermistor.
The beneficial effects of the utility model are:
1, thunder-lightning surge function: realized by piezo-resistance.
When scurrying into thunder and lightning or surge in circuit; piezo-resistance responds fast due to instantaneous pressure; after piezo-resistance conducting; electric current is shunted; inhibit instantaneous pressure; prevent from parallel element to be thereafter subject to excessive instantaneous voltage to destroy or interference, also protect the destruction of NTC thermistor from larger surge voltage.
2, anti-function of current: realized by NTC thermistor.
Capacitor is had in circuit; booting moment produces instantaneous large-current (voltage is low, little relative to amplitude of lightning current) due to capacitor charging, produces destroy other electronic components; NTC has certain resistance in the cold state, plays and increases the protective effect that impedance reduces electric current.NTC thermistor heating under the effect of immediate current and operating current, resistance reduces, and power consumption is very little, does not affect circuit working.
3, high temperature-proof function: completed by Thermal Cutoffs.
When device temperature is too high or electric current reaches its fusing value, blown fuse, cut-off loop, proterctive equipment.Although Thermal Cutoffs has high reliability in design, but the abnormal conditions that single Thermal Cutoffs can be dealt with are limited after all, add that the effect of artificial or unforeseen force majeure Thermal Cutoffs of ordering sustains damage and can not normally play a role, cannot cut-off loop in time when then electrical equipment occurs abnormal, therefore in exigent place as gas station, use two or more to have the Thermal Cutoffs of different fusing-off temperature, guarantee safe and effective.
4, the special function combined: improve piezo-resistance and NTC thermistor function, anti-high pressure, anti-big current, high temperature-proof.
Work as fault, when there is irrational big current value, the temperature of NTC thermistor can raise, and carrys out open fuse, proterctive equipment by this temperature.
When NTC thermistor is in deterioration with when losing efficacy, often produces a large amount of heats, carry out open fuse by this temperature, get rid of hidden danger, proterctive equipment.
When piezo-resistance runs into power frequency high voltage, when exceeding its maximum permission close to collapse, often temperature raises, and carrys out open fuse, prevent piezo-resistance short-circuit failure or burning by this temperature, gets rid of hidden danger, proterctive equipment.
When piezo-resistance is by each inrush current shock and performance degradation, in deterioration with when losing efficacy, often produce a large amount of heats, carry out open fuse by this temperature, prevent piezo-resistance short-circuit failure or burning, get rid of hidden danger, proterctive equipment.
Thermal Cutoffs has coordinated the effect of last line of defense with NTC thermistor and piezo-resistance.
accompanying drawing illustrates:
Accompanying drawing 1 is the structural representation of the utility model simple insurance silk;
Accompanying drawing 2 is the structural representation of the utility model Dual-fuse;
Accompanying drawing 3 is the structural representation of the utility model envelope-like;
Accompanying drawing 4 is circuit connecting wire figure of the present utility model.
embodiment:
Can have the object of the utility model, feature and function to make juror and further understand, hereby lift preferred embodiment and coordinate graphic being described in detail as follows:
Refer to shown in Fig. 1 ~ 3, it is the schematic diagram of the preferred embodiment of the utility model, the purpose of this utility model is for the existing state of the art, a kind of Novel piezoresistor of multifunctional protection is provided, mainly comprise: piezo-resistance 1, NTC thermistor 2, Thermal Cutoffs 3 and insulating barrier cover 4, described piezo-resistance 1, NTC thermistor 2 and Thermal Cutoffs 3 are electrically connected to each other and are adjacent to, and Thermal Cutoffs 3 is at least provided with one.
In such scheme, piezo-resistance 1, NTC thermistor 2 and Thermal Cutoffs 3 outside be provided with for the protection of insulating barrier cover 4, the encapsulating of described insulating barrier cover 4 forms, and described insulating barrier cover 4 is formed by the filler of protective sleeve 6 embedding flame-resistant insulation.Cooperatively interacted by insulating barrier cover 4 and protective sleeve 6; achieve two-layer protection; effectively prevent electronic component overheated causing from burning; the connected mode of piezo-resistance 1 and NTC thermistor 2 is silver slurry or soldering; any junction therebetween of described piezo-resistance 1, NTC thermistor 2 and Thermal Cutoffs 3 can be provided with lead-in wire 5 and draw, and the direction of its lead-in wire 5 can change according to the needs of product.
Preferably, Thermal Cutoffs 3 quantity is two, Thermal Cutoffs 3 can select different model, the different Thermal Cutoffs 3 of two fusing-off temperatures is connected in series, two or more is used to have the Thermal Cutoffs 3 of different fusing-off temperature, guarantee to have at least a Thermal Cutoffs 3 normally to play a role, described Thermal Cutoffs, piezo-resistance is connected with one end lead-in wire of NTC thermistor, piezo-resistance, another pin a of Thermal Cutoffs and NTC thermistor, b and c draws separately, its circuit connecting wire is as Fig. 4, when there is lightning surge in circuit, piezo-resistance 1 responds fast, after piezo-resistance 1 conducting, be decreased through the voltage of piezo-resistance 1, thus protection NTC thermistor and below parallel element.If piezo-resistance 1 mid-winter, or abnormal liter of the excessive temperature NTC thermistor 2 of electric current then causes Thermal Cutoffs 3 to fuse, and cuts off the electricity supply the safety ensureing load circuit.
More than show and describe general principle of the present utility model and principal character and advantage of the present utility model, the technical staff of the industry should understand, the utility model is not restricted to the described embodiments, what describe in above-described embodiment and specification just illustrates principle of the present utility model, under the prerequisite not departing from the utility model spirit and scope, the utility model also has various changes and modifications, these changes and improvements all fall within the scope of claimed the utility model, the claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (7)
1. a Novel piezoresistor, mainly comprise: piezo-resistance (1), NTC thermistor (2), Thermal Cutoffs (3), it is characterized in that: described Thermal Cutoffs (3), piezo-resistance (1) and NTC thermistor (2) are electrically connected and mutually press close to, and Thermal Cutoffs (3) is at least provided with one.
2. a kind of Novel piezoresistor according to claim 1, is characterized in that: described piezo-resistance (1), NTC thermistor (2) and Thermal Cutoffs (3) outside be provided with for the protection of insulating barrier cover (4).
3. a kind of Novel piezoresistor according to claim 2, is characterized in that: described insulating barrier cover (4) encapsulating forms.
4. a kind of Novel piezoresistor according to claim 2, is characterized in that: described insulating barrier cover (4) is formed by the filler of protective sleeve (6) embedding flame-resistant insulation.
5. a kind of Novel piezoresistor according to claim 1, is characterized in that: described piezo-resistance (1) and the connected mode of NTC thermistor (2) are silver slurry or soldering.
6. a kind of Novel piezoresistor according to claim 5, is characterized in that: any junction therebetween of described piezo-resistance (1), NTC thermistor (2) and Thermal Cutoffs (3) can be provided with lead-in wire (5) and draw.
7. a kind of Novel piezoresistor according to claim 1 to 6 any one, it is characterized in that: described Thermal Cutoffs (3) quantity is two, the different Thermal Cutoffs (3) of two fusing-off temperatures is connected in series, the piezo-resistance (1) that Thermal Cutoffs (3) is arranged on or the side of NTC thermistor (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520530206.5U CN204834226U (en) | 2015-07-21 | 2015-07-21 | Novel piezo -resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520530206.5U CN204834226U (en) | 2015-07-21 | 2015-07-21 | Novel piezo -resistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204834226U true CN204834226U (en) | 2015-12-02 |
Family
ID=54691798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520530206.5U Active CN204834226U (en) | 2015-07-21 | 2015-07-21 | Novel piezo -resistor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204834226U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108766853A (en) * | 2018-06-08 | 2018-11-06 | 佛山市仁星电气有限公司 | The main temperature controller of packaged type and temperature control device |
| CN108878405A (en) * | 2018-07-02 | 2018-11-23 | 深圳市槟城电子有限公司 | A kind of protective device and preparation method thereof, electronic equipment |
| WO2019114186A1 (en) * | 2017-11-10 | 2019-06-20 | 厦门赛尔特电子有限公司 | Thermally protected varistor |
-
2015
- 2015-07-21 CN CN201520530206.5U patent/CN204834226U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019114186A1 (en) * | 2017-11-10 | 2019-06-20 | 厦门赛尔特电子有限公司 | Thermally protected varistor |
| CN108766853A (en) * | 2018-06-08 | 2018-11-06 | 佛山市仁星电气有限公司 | The main temperature controller of packaged type and temperature control device |
| CN108878405A (en) * | 2018-07-02 | 2018-11-23 | 深圳市槟城电子有限公司 | A kind of protective device and preparation method thereof, electronic equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20130293343A1 (en) | Device combining a thermal fuse and a resistor | |
| CN201656470U (en) | Lightning protection circuit with overcurrent protection function | |
| CA2568003A1 (en) | Surge protection device | |
| CN203589720U (en) | LED optical engine lightning protection apparatus | |
| CN204834226U (en) | Novel piezo -resistor | |
| CN104393562A (en) | Overvoltage and electric leakage integrated protection circuit breaker | |
| CN201733089U (en) | Surge protector | |
| CN203300549U (en) | Temperature fuse protector with dual-protection function | |
| CN202282601U (en) | Protection circuit combining high-polymer phenylthiocarbamide (PTC) thermistor and piezoresistor | |
| CN203026939U (en) | Novel surge protector | |
| CN204834219U (en) | Thermistor with fuse | |
| CN203950625U (en) | Novel heat protection piezo-resistance and Surge Protector | |
| CN203039363U (en) | Three-phase surge protector | |
| CN202534449U (en) | Cement resistor with temperature fuse wire | |
| CN102403705A (en) | Thermistor type over-current and over-voltage protection device | |
| CN204118729U (en) | The lightning protection thermel protection device of three-phase leakage switch | |
| CN103384419A (en) | Self-fusing protecting electric heating device and protecting method thereof | |
| CN101887790B (en) | Piezoresistor for lightning protection | |
| CN202978261U (en) | Double-channel surge protector | |
| CN207183192U (en) | A kind of current over-load protector structure | |
| CN202772088U (en) | Lightning protection device capable of automatic release under overcurrent and overheat | |
| CN205751736U (en) | A kind of varistor with Double-side hot protection | |
| CN202565478U (en) | Electric heating device having self-fusing protection function | |
| CN204205551U (en) | Overvoltage and electric leakage comprehensive protective circuit breaker | |
| CN204992522U (en) | Circuit protector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |