CN1933040A - Easy-to-produce antiexplosive voltage-dependent resister - Google Patents
Easy-to-produce antiexplosive voltage-dependent resister Download PDFInfo
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- CN1933040A CN1933040A CN 200610021954 CN200610021954A CN1933040A CN 1933040 A CN1933040 A CN 1933040A CN 200610021954 CN200610021954 CN 200610021954 CN 200610021954 A CN200610021954 A CN 200610021954A CN 1933040 A CN1933040 A CN 1933040A
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- housing
- main body
- seal
- varistor
- piezo
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Abstract
A varistor uses to produce explosion-protected varistor. It relates to shell and varistors main body inside of shell. The main body is made up of varistor ceramics group piece and insulating layer enveloping the varistor ceramics group piece and there are two detached inner electrodes on surface of varistor ceramics group piece. There are first and second derivation electrode on varistors main body, and the inner wall of shell and the outside wall of varistors main body make up of a hold cavity. Insulated non-burn material fills in the cavity and makes up of the insulated non-burn material layer warped the varistors main body. The bottom is glue-sealed layer and the other ends of the first and second derivation electrodes cross the insulated layer and glue-sealed layer to out of shell. It can effectively enhance the production speed and reduce the production technology to improve the closed ability of shell bottom.
Description
Technical field
The present invention relates to a kind of varistor, especially a kind of anti-explosion type voltage dependent resistor of being convenient to make.
Background technology
Varistor is widely used in the various electronic equipments as a kind of surge protection element, in use finds, when extraneous surge energy surpassed the tolerance of piezo-resistance, piezo-resistance can breakdown short circuit.In side circuit, piezo-resistance is connected across between the live wire and zero line of power supply often, transient energy is very big during short circuit, the punch through damage place can produce localized hyperthermia, the insulation and moisture that voltage-sensitive ceramic substrate outside may be wrapped up in envelope be wrapped up in seal (being main material with organic materials such as epoxy resin usually) and ignite, and might cause electric equipment such as air-conditioning on fire when serious.
At this potential safety hazard, there have been some technical measures to be used to prevent the generation of accident on fire.For example, the present inventor once disclosed a kind of varistor with arc-extinguishing flame-retarding function in Chinese utility model patent ZL200420033754.9 number, have housing and be encapsulated in the interior piezo-resistance main body of housing, described piezo-resistance main body is by the voltage-sensitive ceramic substrate and seal is wrapped up in the insulation that the voltage-sensitive ceramic substrate is sealed constituted, be provided with the interior electrode of two separation on the surface of described voltage-sensitive ceramic substrate, on the piezo-resistance main body, be connected with first extraction electrode and second extraction electrode, one end of described first extraction electrode and second extraction electrode is connected with two interior electrodes conduct of described voltage-sensitive ceramic substrate surface respectively, the other end of described first extraction electrode and second extraction electrode passes insulation and wraps up in seal and extend to outside the housing, it is characterized in that having the gap and constituting the particle container cavity between the outer wall of the inwall of described housing and piezo-resistance main body, in described particle container cavity, be filled with insulation and do not fire particle and constitute stratum granulosum is not fired in the insulation of piezo-resistance main body parcel, on described housing, offer the pore that the particle container cavity is connected with outside.But the technical scheme that this patent provides is extremely simple effective, it has solved the technical barrier that exists in varistor manufacturing field for a long time, the manufacturing cost of product increases few, can prevent effectively because the electrical equipment pyrophoricity accident that arc discharge causes, and can alleviate of the transmission of high heat to shell, alleviate porcelain body and burst the destruction of generation, the user also can make it and the supporting use of available circuit plate easily.In addition, in above-mentioned patent, because the shell wall of housing is provided with pore, thereby can when the piezo-resistance puncture short, in time discharge the hot gas that generates in the housing, like this, even adopt thin or the lower housing of intensity, also can avoid housing when the piezo-resistance puncture short, to occur bursting as far as possible, help reducing the cost of manufacture of product.
In addition; the present inventor also discloses thermal protection anti-explosion piezo-resistance No. 200610021223.1 in the Chinese invention patent application; hot protection type varistor is disclosed at Chinese utility model patent ZL02222055.0 number; the varistor that can be used for high frequency condition is disclosed at Chinese utility model patent ZL02245083.1 number; in the Chinese invention patent application No. 200410045212.8 a kind of varistor with arc-extinguishing flame-retarding function etc. is disclosed; these patent applications all improve at the potential safety hazard that varistor exists, and have obtained better technical effect.
Though the given technical scheme of above-mentioned patent application has plurality of advantages,, concrete structure and the corresponding production method thereof to housing do not carry out preferably in the technical scheme of above-mentioned patent application.Therefore, more convenient for the making that makes product, be necessary the shell structure of the said goods is done further research and preferred.
Summary of the invention
Purpose of the present invention promptly is that the shell structure of above-mentioned existing product is carried out preferably, so that a kind of anti-explosion type voltage dependent resistor of being convenient to make to be provided.
In order to reach the foregoing invention purpose, we study the shell structure of existing varistor from the angle of being convenient to processing and fabricating.Think by studying us, can accelerate manufacturing process as the bottom of housing, simplify manufacture craft with the glue seal.Described glue seal can be by various encapsulating materials: solidify the back as epoxy resin or polysulfide, polyurethanes, organosilicon etc. and form.Additional disclosure is feasible because existing ripe electronic package material is adopted in the positive housing encapsulation of pressure-sensitive electricity once, and these technical measures can't cause adverse effect to the fail safe of piezo-resistance main body.
Ensuing experiment confirm our analysis, organic siliconresin that is easy to conduct heat when employing or epoxy resin are during as the bottom of housing, the manufacturing schedule of making product will be improved the also corresponding simplification of manufacturing process.
Specifically, a kind of anti-explosion type voltage dependent resistor of being convenient to make of the present invention has housing and is contained in the interior piezo-resistance main body of housing, described piezo-resistance main body is by the voltage-sensitive ceramic substrate and seal is wrapped up in the insulation that the voltage-sensitive ceramic substrate is sealed constituted, be provided with the interior electrode of two separation on the surface of described voltage-sensitive ceramic substrate, the piezo-resistance main body is provided with first extraction electrode and second extraction electrode, one end of described first extraction electrode is connected with two interior electrodes conduct of described voltage-sensitive ceramic substrate surface respectively with an end of second extraction electrode, have the gap between the outer wall of the inwall of described housing and piezo-resistance main body and constitute container cavity, in described container cavity, be filled with the insulation incombustible material and constitute the insulation incombustible material layer that the piezo-resistance main body is wrapped up, the bottom that it is characterized in that described housing is the glue seal, and the other end of the other end of described first extraction electrode and second extraction electrode passes to insulate to wrap up in seal and pass the glue seal and extends to outside the housing.
In the present invention, the described insulation that the voltage-sensitive ceramic substrate is sealed wrap up in seal can be wrapping up in of constituting of organic siliconresin seal or organosilicon coating constitute wrapping up in of wrapping up in that seal, phenolic resins constitute seal, insulating varnish constitute wrap up in that seal, epoxy resin constitute wrap up in seal or the like.
From heat-transfer effect angle consideration preferably, seal is wrapped up in the above-mentioned insulation that special recommendation of the present invention adopts organic siliconresin to constitute, said organic siliconresin can directly adopt existing commercially available prod or prepare by existing manufacture method, manufacture method of the high-temperature resistant organic silicon resin that provides for No. 85103446 as Chinese invention patent or the like.
In the present invention, described housing can be hermetic housing, but mode is that housing is provided with the exhaust outlet that container cavity is connected with outside preferably.
In addition, when housing is provided with exhaust outlet, can also be provided with the exhaust outlet plugging structure that under gases at high pressure impact, to open in described exhaust ports.In the present invention, above-mentioned exhaust outlet plugging structure can be shutoff sheet or small-sized pressure-relief valve structure or the like.When the actual fabrication product, the setting of above-mentioned exhaust outlet plugging structure opening pressure can be decided according to the specific requirement of product, as long as can open automatically when puncture short appears in product, the gas that produces in the discharging housing gets final product, and the mechanism of its pressure release exhaust and existing pressure cooker are similar.
Consider from the angle of simplifying product structure, reduction product cost, recommend to adopt the shutoff sheet herein as above-mentioned exhaust outlet plugging structure.The shutoff sheet that is adopted can be to stick on the housing and with the shutoff sheet (as aluminium foil, plastic film or the like) of exhaust outlet shutoff, also can be that periphery is fixedlyed connected with the inwall of exhaust outlet and with the shutoff sheet of exhaust outlet shutoff.
Adopting periphery to fixedly connected with the inwall of exhaust outlet and during with this version of shutoff sheet of exhaust outlet shutoff, this shutoff sheet can with the same material of housing, also can unlike material.When the two adopted identical material, above-mentioned shutoff sheet can directly form when making housing.Comparatively simple and easy to do scheme has two:
Scheme one: the weak point of default one (or several) ring-type on housing, as annular ditch groove or by a plurality of breakpoint shape pits and arrangement ring-type pit group circlewise, the housing parts of corral promptly constitutes above-mentioned shutoff sheet within this ring-type weak point, simultaneously, the position at shutoff sheet place also promptly constitutes the exhaust outlet of reserving.In this structure, can be considered as is that the periphery of shutoff sheet is fixedlyed connected with the inwall of exhaust outlet and with the exhaust outlet shutoff flexiblely.When being subjected to the gases at high pressure impact, above-mentioned ring-type weak point breaks, and by all or part of disengaging housing of the shutoff sheet of ring-type weak point corral, makes exhaust open.
Scheme two: default one (or several) block weakness zone on housing, as the pit of bulk, and housing that should bulk pit position as thin as a wafer, and the housing parts of this bulk weak point institute corral promptly constitutes above-mentioned shutoff sheet, simultaneously, the position at shutoff sheet place also promptly constitutes the exhaust outlet of reserving.In this structure, also can be considered as is that the periphery of shutoff sheet is fixedlyed connected with the inwall of exhaust outlet and with the exhaust outlet shutoff flexiblely.When being subjected to the gases at high pressure impact, breaking can appear in above-mentioned block weak point, thereby makes exhaust open.
In the present invention, described insulation incombustible material layer can be the quartz sand layer of quartz sand formation, can also be the asbestos layer that asbestos constitute, or even the magnesium hydroxide powder layer of magnesium hydroxide powder formation.
But improvement project of the present invention is extremely simple effective, it can adopt various encapsulating materials: solidify the bottom that glue seal that the back forms has constituted housing as epoxy resin or polysulfide, polyurethanes, organosilicon etc., allow the other end of the other end of first extraction electrode and second extraction electrode pass the glue seal naturally and extend to outside the housing.This is enhance production progress effectively, simplifies production technology, and can satisfy the needs of client to piezo-resistance fail safe aspect.After adopting technical scheme of the present invention, the glue seal that solidifies back formation can be with the bottom complete closed of housing, improve the sealing property of housing bottom, therefore technical scheme of the present invention can also produce following beyond thought technique effect: the incombustible material layer that promptly can prevent to insulate from the housing bottom slit to external leakage, the incombustible material layer of avoiding insulating pollutes circuit board, and this point is even more important for some accurate electrical equipment.
Content of the present invention further illustrates with the following Examples, but content of the present invention not instrument be limited to content related among the embodiment.
Description of drawings
Fig. 1 is the structural representation of varistor among the embodiment 1.
Fig. 2 is the A-A cutaway view of Fig. 1.
Fig. 3 is the vertical view of Fig. 1.
Fig. 4 is the B-B cutaway view of Fig. 1.
Fig. 5 is the structural representation of varistor among the embodiment 2.
Fig. 6 is the C-C cutaway view of Fig. 1.
Fig. 7 is the vertical view of Fig. 1.
Fig. 8 is the D-D cutaway view of Fig. 1.
Fig. 9 is the structural representation of varistor among the embodiment 3.
Figure 10 is the E-E cutaway view of Fig. 9.
Figure 11 is the vertical view of Fig. 9.
Figure 12 is the F-F cutaway view of Fig. 9.
Figure 13 is that the shutoff sheet of varistor among Fig. 9 is washed out by gases at high pressure and forms the structural representation of exhaust outlet.
Figure 14 is the structural representation of varistor among the embodiment 4.
Figure 15 is the G-G cutaway view of Figure 14.
Figure 16 is the H-H cutaway view of Figure 14.
Figure 17 is the structural representation of varistor among the embodiment 5.
Figure 18 is the I-I cutaway view of Figure 17.
Figure 19 is the vertical view of Figure 17.
Figure 20 is the J-J cutaway view of Figure 17.
Figure 21 is that the shutoff sheet of varistor among Figure 17 is washed out by gases at high pressure and forms the structural representation of exhaust outlet.
Figure 22 is the structural representation of varistor among the embodiment 6.
Figure 23 is the K-K cutaway view of Figure 22.
Embodiment
Embodiment 1: shown in Fig. 1～4, a kind of anti-explosion type voltage dependent resistor of being convenient to make in the present embodiment, have housing 1 and be contained in the interior piezo-resistance main body 2 of housing, described piezo-resistance main body 2 is by voltage-sensitive ceramic substrate 3 and seal 4 is wrapped up in the insulation that the voltage-sensitive ceramic substrate is sealed constituted, be provided with the interior electrode 5 of two separation on the surface of described voltage-sensitive ceramic substrate 3,6, piezo-resistance main body 2 is provided with first extraction electrode 7 and second extraction electrode 8, one end of one end of described first extraction electrode 7 and second extraction electrode 8 respectively with two interior electrodes 5 of described voltage-sensitive ceramic substrate surface, 6 conductions connect, have the gap between the outer wall of the inwall of described housing 1 and piezo-resistance main body 2 and constitute container cavity, in described container cavity, be filled with the insulation incombustible material and constitute the insulation incombustible material layer 9 that the piezo-resistance main body is wrapped up, the bottom that it is characterized in that described housing 1 is a glue seal 15, and the other end of the other end of described first extraction electrode 7 and second extraction electrode 8 passes to insulate to wrap up in seal 4 and pass glue seal 15 and extends to outside the housing 1.
It is to wrap up in seal by what organic siliconresin constituted that seal 4 is wrapped up in insulation described in the present embodiment.Described glue seal 15 is that epoxy resin solidifies the epoxy resin layer that the back forms.
Embodiment 2: shown in Fig. 5～8, the varistor in the present embodiment is similar to embodiment 1, and different is in the present embodiment, to be that described housing is provided with the exhaust outlet that container cavity is connected with outside.In the present embodiment, above-mentioned exhaust outlet plugging structure is to stick on the housing and with the shutoff sheet 11 (the shutoff sheet 11 in this example is aluminium foil) of exhaust outlet 10 shutoff.Simultaneously, to wrap up in seal 4 be to wrap up in seal by what organic siliconresin constituted in above-mentioned insulation.The quartz sand layer that above-mentioned insulation incombustible material layer 9 constitutes for quartz sand.
Embodiment 3: shown in Fig. 9～12, the varistor in the present embodiment is similar to embodiment 2, and different is that in the present embodiment, described exhaust ports is provided with the exhaust outlet plugging structure that can open under gases at high pressure impact.Described exhaust outlet plugging structure is that periphery is fixedlyed connected with the inwall of exhaust outlet and with the shutoff sheet 12 of exhaust outlet shutoff.Present embodiment has been preset the weak point of a ring-type on housing 1, it is annular ditch groove 13, the housing parts of corral promptly constitutes above-mentioned shutoff sheet 12 within this annular ditch groove 13, and simultaneously, the position at shutoff sheet 12 places has also promptly constituted the exhaust outlet of reserving 10 (referring to Figure 13).In this structure, can be considered as is that the periphery of shutoff sheet 12 is fixedlyed connected with the inwall of exhaust outlet 10 and with exhaust outlet 10 shutoff flexiblely.As shown in figure 13, when being subjected to the gases at high pressure impact, above-mentioned ring-type weak point breaks, and by the shutoff sheet 12 all or part of disengaging housings of annular ditch groove 13 corrals, exhaust outlet 10 is opened.In addition, above-mentioned annular ditch groove 13 also can be made of (the ring-type pit group that promptly constitutes the dotted line shape) a plurality of point-like pits that are arranged in closed circular.
It is to wrap up in seal by what epoxy resin constituted that seal 4 is wrapped up in insulation in the present embodiment.The magnesium hydroxide powder layer that described insulation incombustible material layer 9 constitutes for magnesium hydroxide powder.Described glue seal 15 is that polysulfide solidifies the polysulfide layer that the back forms.
In the present embodiment, above-mentioned annular ditch groove 13 is towards outside.
Embodiment 4: shown in Figure 14～16, the varistor in the present embodiment is similar to embodiment 3, and different is, in the present embodiment, above-mentioned annular ditch groove 13 is towards enclosure interior.
Embodiment 5: shown in Figure 17～20, the varistor in the present embodiment is similar to embodiment 3, and promptly the exhaust outlet plugging structure is that periphery is fixedlyed connected with the inwall of exhaust outlet and with the shutoff sheet 12 of exhaust outlet shutoff.Different is, in the present embodiment, default one (or several) block weakness zone on housing 1, pit 14 as bulk, and housing that should bulk pit position as thin as a wafer, the housing parts of this bulk weak point institute corral promptly constitutes above-mentioned shutoff sheet 12, and simultaneously, the position at shutoff sheet place also promptly constitutes the exhaust outlet of reserving 10 (referring to Figure 21).In this structure, also can be considered as is that the periphery of shutoff sheet 12 is fixedlyed connected with the inwall of exhaust outlet 10 and with exhaust outlet 10 shutoff flexiblely.As shown in figure 21, when being subjected to the gases at high pressure impact, breaking can appear in above-mentioned block weak point, thereby exhaust outlet 10 is opened.
It is to wrap up in seal by what epoxy resin constituted that seal 4 is wrapped up in insulation in the present embodiment.The asbestos layer that described insulation incombustible material layer 9 constitutes for asbestos.Described glue seal 15 is that polyurethanes solidifies the layer of polyurethane that the back forms.
In the present embodiment, the pit 14 of above-mentioned bulk is towards outside.
Embodiment 6: shown in Figure 22,23, the varistor in the present embodiment is similar to embodiment 5, and different is that in the present embodiment, the pit 14 of above-mentioned bulk is towards enclosure interior.Described glue seal 15 is that organosilicon solidifies the silicone layer that the back forms.
Claims (7)
1, a kind of anti-explosion type voltage dependent resistor of being convenient to make, have housing and be contained in the interior piezo-resistance main body of housing, described piezo-resistance main body is by the voltage-sensitive ceramic substrate and seal is wrapped up in the insulation that the voltage-sensitive ceramic substrate is sealed constituted, be provided with the interior electrode of two separation on the surface of described voltage-sensitive ceramic substrate, the piezo-resistance main body is provided with first extraction electrode and second extraction electrode, one end of described first extraction electrode is connected with two interior electrodes conduct of described voltage-sensitive ceramic substrate surface respectively with an end of second extraction electrode, have the gap between the outer wall of the inwall of described housing and piezo-resistance main body and constitute container cavity, in described container cavity, be filled with the insulation incombustible material and constitute the insulation incombustible material layer that the piezo-resistance main body is wrapped up, the bottom that it is characterized in that described housing is the glue seal, and the other end of the other end of described first extraction electrode and second extraction electrode passes to insulate to wrap up in seal and pass the glue seal and extends to outside the housing.
2, varistor as claimed in claim 1 is characterized in that it is to wrap up in seal by what organic siliconresin constituted that seal is wrapped up in described insulation.
3, varistor as claimed in claim 2 is characterized in that described housing is provided with the exhaust outlet that container cavity is connected with outside.
4, varistor as claimed in claim 3 is characterized in that described exhaust ports is provided with the exhaust outlet plugging structure that can open under gases at high pressure impact.
5,, it is characterized in that described insulation incombustible material layer is the quartz sand layer that quartz sand constitutes as claim 1 or 2 or 3 or 4 described varistors.
6,, it is characterized in that described insulation incombustible material layer is the asbestos layer that asbestos constitute as claim 1 or 2 or 3 or 4 described varistors.
7,, it is characterized in that described insulation incombustible material layer is the magnesium hydroxide powder layer that magnesium hydroxide powder constitutes as claim 1 or 2 or 3 or 4 described varistors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610021954 CN1933040A (en) | 2006-09-27 | 2006-09-27 | Easy-to-produce antiexplosive voltage-dependent resister |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610021954 CN1933040A (en) | 2006-09-27 | 2006-09-27 | Easy-to-produce antiexplosive voltage-dependent resister |
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| CN1933040A true CN1933040A (en) | 2007-03-21 |
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| CN 200610021954 Pending CN1933040A (en) | 2006-09-27 | 2006-09-27 | Easy-to-produce antiexplosive voltage-dependent resister |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101079343B (en) * | 2007-07-05 | 2010-08-18 | 成都铁达电子有限责任公司 | Voltage-sensitive resistor with compound encapsulation voltage-leakage device |
| CN102723155A (en) * | 2012-07-09 | 2012-10-10 | 深圳市辰驹电子科技有限公司 | Overcurrent and overvoltage protector with adjustable values |
| CN105788782A (en) * | 2016-05-05 | 2016-07-20 | 广东百圳君耀电子有限公司 | Anti-explosion long-service-life piezoresistor |
| CN109300638A (en) * | 2018-11-27 | 2019-02-01 | 深圳市辰驹电子科技有限公司 | Anti- power frequency arc extinguishing encapsulation piezoresistor and packaging method |
| CN109633313A (en) * | 2018-12-18 | 2019-04-16 | 米艾西(福建)测控技术有限公司 | A kind of insulating cement fill method in load tray |
-
2006
- 2006-09-27 CN CN 200610021954 patent/CN1933040A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101079343B (en) * | 2007-07-05 | 2010-08-18 | 成都铁达电子有限责任公司 | Voltage-sensitive resistor with compound encapsulation voltage-leakage device |
| CN102723155A (en) * | 2012-07-09 | 2012-10-10 | 深圳市辰驹电子科技有限公司 | Overcurrent and overvoltage protector with adjustable values |
| CN102723155B (en) * | 2012-07-09 | 2016-12-07 | 深圳市辰驹电子科技有限公司 | Adjustable value over-current overvoltage protector |
| CN105788782A (en) * | 2016-05-05 | 2016-07-20 | 广东百圳君耀电子有限公司 | Anti-explosion long-service-life piezoresistor |
| CN109300638A (en) * | 2018-11-27 | 2019-02-01 | 深圳市辰驹电子科技有限公司 | Anti- power frequency arc extinguishing encapsulation piezoresistor and packaging method |
| CN109633313A (en) * | 2018-12-18 | 2019-04-16 | 米艾西(福建)测控技术有限公司 | A kind of insulating cement fill method in load tray |
| CN109633313B (en) * | 2018-12-18 | 2020-11-13 | 米艾西(福建)测控技术有限公司 | Method for filling insulating glue in load box |
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Application publication date: 20070321 |