CN2762301Y - Flame-resistance varistor - Google Patents
Flame-resistance varistor Download PDFInfo
- Publication number
- CN2762301Y CN2762301Y CN 200420086526 CN200420086526U CN2762301Y CN 2762301 Y CN2762301 Y CN 2762301Y CN 200420086526 CN200420086526 CN 200420086526 CN 200420086526 U CN200420086526 U CN 200420086526U CN 2762301 Y CN2762301 Y CN 2762301Y
- Authority
- CN
- China
- Prior art keywords
- varistor
- pin
- utility
- model
- chip body
- 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
- Thermistors And Varistors (AREA)
Abstract
The utility model relates to a flame-resistance varistor, which comprises a varistor device and a temperature fuse device. The utility model has the main improvements that a pin of the temperature fuse device is welded with a chip main body of the varistor device, and the other pin is led out as the third pin of the chip main body of the varistor device. The utility model can sense the temperature of a varistor chip by the pins of the temperature fuse device, which causes the heat emitted by the varistor chip to be directly transferred to a fuse by the pins of the temperature fuse. Proved by the contrast test, the utility model has the advantages of accurate temperature sense and flexible action compared with the prior art. In addition, an encapsulation layer of the utility model is made of organic silicon material, under the equal overtemperature test condition, the varistor which is sealed by epoxy resin is easy to be ignited, but the varistor which is sealed by the organic silicon is safe and sound.
Description
Technical field
The utility model relates to a kind of Zinc-oxide piezoresistor, particularly relates to a kind of anti-burning Zinc-oxide piezoresistor.
Background technology
In prior art, Chinese patent 002379013.9 provides a kind of " safe type piezoresistor ", it has a varistor device and Temperature protection device, common varistor device is by the chip body, the encapsulated layer of two pins that are connected with the chip body and chip body surface constitutes, ordinary temp insurance device is by a Thermal Cutoffs, the outer protecting shell body of the pin at these Thermal Cutoffs two ends and package temperature fuse constitutes, these two devices are encapsulated in the shell by the heat-conduction medium mutually insulated, and described heat-conduction medium can be epoxy resin or air.When overtension that varistor device bears in circuit, its this cognition of chip heating is generated heat and will be burnt to a certain degree the time, brings great hidden danger to electrical equipment.And this varistor device that is added with Temperature protection, can be during to the unallowed value of Temperature protection institute at the voltage dependent resistor chip body self-heating cooking, Thermal Cutoffs fusing makes supply line's disconnection of electrical equipment, then the voltage at piezo-resistance two ends is zero, thereby has prevented that piezo-resistance from continuing to generate heat and burn.The problem that this patent exists is: the Temperature protection device can not directly be experienced the temperature of voltage dependent resistor chip body, but the outer protecting shell body of package layer, heat-conduction medium and Thermal Cutoffs that will be by the voltage dependent resistor chip body surface just can be experienced, that is to say, what Thermal Cutoffs was experienced is its ambient temperature, and not exclusively be the actual temperature of voltage dependent resistor chip body, like this, will inevitably reduce the action sensitivity and the precise control of Temperature protection.Moreover the encapsulated layer of voltage dependent resistor chip body surface generally all adopts epoxy resin, and the heat-conduction medium of this patented technology also adopted epoxy resin, and the fire resistance of this material is not ideal enough, when surpassing 300 ℃, still can burn.In order to make piezo-resistance have better fire resistance, the fire resistance of its chip body surface encapsulated layer should be high more good more.
The utility model content
The purpose of this utility model is the shortcoming at prior art, and the anti-burning type varistor that a kind of temperature-sensitive is accurate, action sensitivity is high is provided, and secondly is the fire resistance that further improves this device.
For achieving the above object, the designer analyzes the structure of Temperature protection device, think by structural analysis: the fuse in the Temperature protection device is a temperature-sensing element, experience ambient temperature more directly, accurately and fast by the direct temperature-sensitive of the pin of fuse than it, therefore, the utility model has provided following concrete solution:
It comprises a varistor device and a Temperature protection device, described varistor device is made of the encapsulated layer of chip body, two pins that are connected with the chip body and chip body surface, described Temperature protection device is made of the pin and the outer protecting shell body thereof at a Thermal Cutoffs, these Thermal Cutoffs two ends, its improvements are: pin of described Temperature protection device and the welding of the chip body of varistor device, its another pin is drawn as the 3rd pin of varistor device chip body.
It is best that the encapsulated layer of above-mentioned varistor device chip body surface adopts organosilicon material.
By above-mentioned solution as can be seen, the utility model is experienced the temperature of voltage dependent resistor chip by the pin of Temperature protection device, makes the voltage dependent resistor chip evolution of heat be directly delivered to fuse by the pin of Temperature protection.Confirm that by contrast test the utility model is more accurate than prior art temperature-sensitive, be active in one's movements.Moreover encapsulated layer of the present utility model is selected organosilicon material for use, under equal overtemperature experimental condition (above 300 ℃), adopts the ignition of epoxy encapsulation, and adopts the still safe and sound of organosilicon encapsulation.In sum, anti-burning performance of the present utility model obviously is better than prior art.
Description of drawings
Fig. 1, overall structure schematic diagram of the present utility model.
Fig. 2, circuit theory diagrams of the present utility model
Embodiment
Describe structure of the present utility model and operation principle below with reference to the accompanying drawings in detail.
Referring to Fig. 1, this anti-burning type piezo-resistance is made up of a common zinc oxide varistor spare and a common Temperature protection device, common piezo-resistance is by chip body 2, two pin A that are connected with the chip body, the encapsulated layer 1 of B and chip body surface constitutes, common Temperature protection device 3 is by Thermal Cutoffs, the pin C at these Thermal Cutoffs two ends, D and outer protecting shell body thereof constitute, described outer protecting shell body can be selected for use square or tubular, pin D of described Temperature protection and 2 welding of voltage dependent resistor chip body, its another pin C draws as the 3rd pin of voltage dependent resistor chip body; The encapsulated layer 1 of varistor chip body surface adopts organosilicon material.
Referring to Fig. 2, when this anti-burning type piezo-resistance was used, its A, C pin were connected on the two ends of power supply, and A, B pin join as output and electrical equipment, and B, C pin are as the overtemperature signal output part; Described Temperature protection device 3 is chosen according to desired fusing-off temperature.When power on circuitry; the heat that its voltage dependent resistor chip body sends can be directly delivered to fuse by the D pin, when the temperature of chip body surpasses the fusing-off temperature that Temperature protection device 3 sets, and Temperature protection device 3 actions and disconnecting; that is to say; the D pin of Temperature protection 3 and C pin disconnect, and then the power supply current supply circuit of electrical equipment disconnects, thereby have prevented the piezo-resistance overtemperature and burn; also protected simultaneously electrical equipment; meanwhile, the overtemperature signal output part provides break signal, can be used for detecting.
Claims (2)
1, a kind of anti-burning type piezo-resistance, it comprises a varistor device and a Temperature protection device, described varistor device is by chip body (2), two pins that are connected with the chip body (A), (B) and the encapsulated layer of chip body surface (1) constitute, described Temperature protection device (3) is by a Thermal Cutoffs, the pin at these Thermal Cutoffs two ends (C), (D) and the outer protecting shell body constitute, it is characterized in that: a pin (D) of described Temperature protection device (3) and the welding of the chip body (2) of varistor device, its another pin (C) is drawn as the 3rd pin of varistor device chip body (2).
2, anti-burning type piezo-resistance according to claim 1 is characterized in that: the encapsulated layer (1) of described varistor device chip body surface adopts organosilicon material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420086526 CN2762301Y (en) | 2004-12-30 | 2004-12-30 | Flame-resistance varistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420086526 CN2762301Y (en) | 2004-12-30 | 2004-12-30 | Flame-resistance varistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2762301Y true CN2762301Y (en) | 2006-03-01 |
Family
ID=36095417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420086526 Expired - Fee Related CN2762301Y (en) | 2004-12-30 | 2004-12-30 | Flame-resistance varistor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2762301Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102779601A (en) * | 2011-05-09 | 2012-11-14 | 曾清隆 | Manufacturing method for passive electric component having over-temperature protection function |
| CN102916391A (en) * | 2012-10-25 | 2013-02-06 | 上海金临电子科技有限公司 | Lightning safety monitoring protection device |
-
2004
- 2004-12-30 CN CN 200420086526 patent/CN2762301Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102779601A (en) * | 2011-05-09 | 2012-11-14 | 曾清隆 | Manufacturing method for passive electric component having over-temperature protection function |
| CN102779601B (en) * | 2011-05-09 | 2015-06-17 | 曾清隆 | Manufacturing method for passive electric component having over-temperature protection function |
| CN102916391A (en) * | 2012-10-25 | 2013-02-06 | 上海金临电子科技有限公司 | Lightning safety monitoring protection device |
| CN102916391B (en) * | 2012-10-25 | 2015-11-18 | 上海金临电子科技有限公司 | A kind of thunder and lightning safety monitoring protector |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100533605C (en) | Assembly with super-high-temperature releasing mechanism and pressure-sensitive resistor | |
| US9240300B2 (en) | Device comprising a thermal fuse and a resistor | |
| CN103346547B (en) | A kind of Thunder-prevention overvoltage protection device | |
| CN204257778U (en) | There is the battery of temperature alarming device | |
| CN104332944B (en) | A kind of pressure-sensitive temperature-sensitive compound type overvoltage over-current protection device | |
| CN2762301Y (en) | Flame-resistance varistor | |
| CN209625950U (en) | Overheat overvoltage protection piezoresistor | |
| CN101320605B (en) | Piezoresistor with heat protection function | |
| CN206364305U (en) | Data line interface and data wire with Thermal Protection Structural | |
| CN203434613U (en) | Lightning protection overvoltage protection device | |
| CN205354785U (en) | Incombustible piezo -resistor | |
| CN2826637Y (en) | Deterioration tripping zinc oxide piezoresistor | |
| CN201111299Y (en) | Composite type excessive heating protective resistor | |
| CN209045264U (en) | A kind of Thermal protection type varistor | |
| CN205624619U (en) | Multifunctional gloves | |
| CN100452609C (en) | Over voltage breaking protector | |
| CN201104328Y (en) | Low-temperature electrode connection device | |
| CN201348905Y (en) | Temperature-measurable resistor | |
| CN2535906Y (en) | Thermal-protective voltage-dependent resistor | |
| CN102646547A (en) | Protector for lithium ion battery | |
| CN103337848B (en) | A kind of anti-thunder overvoltage protection component | |
| CN202549721U (en) | Lithium ion battery protector | |
| CN202534450U (en) | Cement resistor | |
| CN201838413U (en) | Temperature protection type varistor with remote-control interface | |
| CN201051431Y (en) | Power arrestor for real time temperature monitoring |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |