CN107528305A - A kind of surge protective device and its application - Google Patents
A kind of surge protective device and its application Download PDFInfo
- Publication number
- CN107528305A CN107528305A CN201710753534.5A CN201710753534A CN107528305A CN 107528305 A CN107528305 A CN 107528305A CN 201710753534 A CN201710753534 A CN 201710753534A CN 107528305 A CN107528305 A CN 107528305A
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- China
- Prior art keywords
- electrode
- leading foot
- cavity
- protective device
- sensitive element
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/005—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection avoiding undesired transient conditions
Abstract
The invention discloses a kind of surge protective device and its application, including inner casing, shell, voltage-sensitive component, electrode lead-out pins and responding to switch component.The present invention is used for transient surges overvoltage in suppression circuit, voltage-sensitive component has close thermal coupling with responding to switch component, when the factors such as the transient surges overvoltage on circuit make voltage-sensitive component hinder the heating of short circuit current persistent fever for some reason, responding to switch component makes separating action because the thermal coupling of temperature-sensitive element responds, fire and hidden peril of explosion are not only efficiently avoid, and prevents electronic equipment from causing secondary destruction.
Description
Technical field
The present invention relates to a kind of circuit protection device, more particularly to a kind of surge protective device and its application.
Background technology
Surge protector or surgesuppressor, are also surge protection device, are a kind of electronics for various sensitivities or costliness
Equipment, as the electronic component on computer and communication relevant device provides the protection device of overvoltage security protection.Existing surge
Protection device be typically aim under medium or general condition surge overvoltage protection design, so surge overvoltage energy compared with
When the small or time is shorter, surge protection device now is unable to the response protection of rapid sensitive, so we would generally be voltage
Sensitive protection element is directly applied to realize the purpose of protection electronic circuit on electronic circuit.Conventional piezo-resistance be include by
The electronic device that Zinc oxide particles and complicated transgranular granular materials are formed, it is a non-linear to voltage device, unique electricity
Voltage-current characteristic is the preferable protection device of sensitive electronic circuit, but its material composition is determined from overvoltage short circuit
Catching fire is easily damaged during load, catastrophic destruction is produced to neighbouring sensitive electronic circuit and element.
So, it would be desirable to a kind of safer more sensitive surge protection device, can be applicable to as communication, computer, TV,
In the protection of surge overvoltage short circuit overload on the high precise control circuit such as air-conditioning, such as electronic circuit because extra electromagnetism is done
When disturbing generation momentary spike electric current suddenly or overvoltage, the surge protection device can turn on absorption, power down of releasing within moment
Come through voltage and play protection electronic equipment effect, and when short circuit overload causes surge device to damage can the quick separating surge protect
Protection unit, avoid causing fire to form catastrophic failure to electronic equipment.
Current existing surge protector is varied, and a kind of surge as disclosed in Patent No. CN201110121526.1 is protected
Protection unit, including surge protection module and base, surge protection module are inserted onto base；Event is provided with surge protection module
Barrier protection release unit, surge protection module include switching mode protection module and votage limit type protection module；It is provided with base remote
Journey warning device；Wherein error protection release unit links with remote alarming device.With finger in switching mode surge protection module
Show the error protection release unit of function, employ rotating contact structure, the dynamic and static conductor connected mode as motion realizes event
Barrier protection departs from work.
A kind of and for example new surge protection device disclosed in Patent No. CN201410342761.5, mainly include lightning protection member
Part, current sensor, relay, signal detection driver element, thermel protection device, overcurrent protective device, current limiter and shell, institute
State lightning protection component to connect with overcurrent protective device, form surge path；The thermel protection device is located at lightning protection component electrode
On；The current sensor is sleeved on surge path, output end access signal detection driver element；The signal detection
Driver element output end is connected with Control pole；Relay normally open contact is parallel to lightning protection component two after being connected with current limiter
Side.Current sensor of the present invention can sense the power current for flowing through lightning protection component, by signal detection driver element make after
Electrical equipment normally opened contact closes, and power current flows through overcurrent protective device, disconnects overcurrent protective device.
The content of the invention
It is an object of the invention to overcome existing surge protective device lacking when overvoltage causes device short circuit overload
Fall into and insufficient, there is provided a kind of surge protective device and its application.
The present invention uses following technical scheme：
A kind of surge protective device, including inner casing, shell, voltage-sensitive component, electrode lead-out pins and responding to switch component；
Described inner casing is closed-in construction, and inner casing is provided with insulating wall, electrode hole and fixed column；Described inner casing passes through lock with shell
Mode engage, when inner casing is engaged with shell by way of lock, formed two cavitys；Two described cavitys are respectively
First cavity and the second cavity；The first described cavity is in the front of inner casing；The second described cavity is at the back side of inner casing；It is described
Voltage-sensitive component include at least one voltage sensitive element；Described electrode lead-out pins include first electrode leading foot and the
Two electrode lead-out pins；Described responding to switch component includes temperature-sensitive element, front electrode and extension spring；Described insulating wall, fixation
Post and responding to switch component are arranged in the first cavity；Described voltage sensitive element is arranged in the second cavity.
Described voltage sensitive element tow sides are respectively equipped with metal electrode film；Described front electrode is located at wherein one
On individual metal electrode film, front electrode is reached in the first cavity by electrode hole by the second cavity, another metal electrode film
It is provided with backplate；Described backplate is placed in the second cavity, and by way of soldering with second electrode leading foot
The inner connection.
First electrode leading foot is additionally provided with described inner casing and stretches out groove and second electrode leading foot stretching groove, wherein first
Electrode lead-out pins stretch out groove and are located in the first cavity, and second electrode leading foot stretches out groove and is located in the second cavity；Described first
Electrode lead-out pins include first electrode leading foot outer end and first electrode leading foot is inner；Described first electrode leading foot is inner
Provided with pulling eye.
As the further explanation of the present invention, described first electrode leading foot is inner to be provided with the bending face of weld；Described is curved
When the folding face of weld is mutually touched with front electrode face face, temperature-sensitive element will bend the face of weld and be welded with front electrode；The one of described extension spring
End is connected with pulling eye, and the other end is connected with fixed column.
As the further explanation of the present invention, described voltage sensitive element is piezoresistor type sensing element or put
Electric conduit-type sensing element or discharging gap formula sensing element.
As the further explanation of the present invention, described temperature-sensitive element is meltable metal alloy solder or conducting polymer
Thing.
A kind of application of described surge protective device is as follows：
The fusion temperature of the current value, magnitude of voltage and the temperature-sensitive element that allow to pass through using preseting in the power supply system is prevented
During arc surge protective device, two external pins that first electrode leading foot outer end and second electrode leading foot outer end are formed are divided
It is not connected on phase line and the neutral conductor or ground wire；Now, responding to switch component connects to form normally closed work with voltage-sensitive component
State, as surge protective device normal operating conditions.
If voltage sensitive element electricity caused by leakage current caused by short-circuit overload current and its shelf-life aging on circuit
Pressure-sensitive sensing unit temperature rise, this temperature are delivered on front electrode, the temperature-sensitive element for promoting thereon reach preset temperature threshold value and
Fusing, under the pulling force effect of extension spring, first electrode leading foot the inner separates with front electrode, and first electrode leading foot is inner
The side of insulating wall is pulled to, promotes to form the dielectric strength of abundance between front electrode and first electrode leading foot the inner, it is thorough
The electrical connection that bottom has completely cut off in surge protective device；Meanwhile prevent moment from fusing and launch separation caused by electric arc form electricity
Breakdown triggers short circuit overload；Now the working condition of responding to switch component is changed into normally opened from normally closed.
Compared with prior art, the beneficial effect that the present invention possesses：
1st, the surge protective device of the present invention has the defencive function of overvoltage short circuit overload moment ejection separation and is heated
Temperature rise moment separation function.
2nd, the protection device can be with moment disjunction, and described insulating wall has prevented first electrode leading foot and front electrode
Electrical contact, forms effective dielectric strength.
3rd, the present invention is simple in construction, and single component multiple use can be achieved, and is advantageous to product reduction and uses number of parts, makes
Cause low.
Brief description of the drawings
Fig. 1 is the inner casing positive structure schematic of the present invention；
Fig. 2 is the inner casing structure schematic diagram of the present invention；
Fig. 3 is the structural representation of the voltage sensitive element of the present invention；
Fig. 4 is the structural representation of the shell of the present invention；
Fig. 5 is the structural representation of the first electrode leading foot of the present invention；
Fig. 6 is the structural representation of the internal part combination of the present invention.
Reference：1st, inner casing, 11, electrode hole, 12, first electrode leading foot stretch out groove, 13, second electrode leading foot stretches
Go out groove, 14, insulating wall, 15, fixed column；1a, the first cavity, 1b, the second cavity, 2, shell, 3, voltage-sensitive component, 31, just
Face electrode, 4, first electrode leading foot, 41, first electrode leading foot outer end, 42, pulling eye, 51, second electrode leading foot outer end,
6th, extension spring；44th, the face of weld is bent.
Embodiment
The present invention is described in more detail with reference to the accompanying drawings and detailed description, but protection scope of the present invention
It is not limited solely to following preferred embodiment.
Embodiment 1：
A kind of surge protective device, including inner casing 1, shell 2, voltage-sensitive component 3, electrode lead-out pins and responding to switch group
Part；Described inner casing 1 is closed-in construction, and inner casing 1 is provided with insulating wall 14, electrode hole 11 and fixed column 15；Described inner casing 1 with
Shell 2 is engaged by way of lock, when inner casing 1 is engaged with shell 2 by way of lock, forms two cavitys；It is described
Two cavitys be respectively the first cavity 1a and the second cavity 1b；The first described cavity 1a is in the front of inner casing 1；Described
Two cavity 1b are at the back side of inner casing 1；Described voltage-sensitive component 3 includes at least one voltage sensitive element；Described electrode
Leading foot includes first electrode leading foot 4 and second electrode leading foot；Described responding to switch component includes temperature-sensitive element, front
Electrode 31 and extension spring 6；Described insulating wall 14, fixed column 15 and responding to switch component is arranged in the first cavity 1a；Described
Voltage sensitive element is arranged in the second cavity 1b.
Described voltage sensitive element tow sides are respectively equipped with metal electrode film；Described front electrode 31 is located at wherein
On one metal electrode film, front electrode 31 is reached in the first cavity 1a by electrode hole 11 by the second cavity 1b, another
Metal electrode film is provided with backplate；Described backplate is placed in the second cavity 1b, and with the by way of soldering
The inner connection of two electrode lead-out pins.
First electrode leading foot is additionally provided with described inner casing 1 and stretches out groove 12 and second electrode leading foot stretching groove 13, its
Middle first electrode leading foot stretches out groove 12 and is located in the first cavity 1a, and second electrode leading foot stretches out groove 13 and is located at the second cavity 1b
It is interior；Described first electrode leading foot 4 includes first electrode leading foot outer end 41 and first electrode leading foot 4 is inner；Described
First electrode leading foot 4 is inner to be provided with pulling eye 42.
Described first electrode leading foot 4 is inner to be provided with the bending face of weld 44；The described bending face of weld 44 and front electrode 31
When face face is mutually touched, temperature-sensitive element welds the face of weld 44 is bent with front electrode 31；One end of described extension spring 6 connects with pulling eye 42
Connect, the other end is connected with fixed column 15.
Described voltage sensitive element is electric discharge tubular type sensing element.
Described temperature-sensitive element is meltable conducting polymer.
The fusion temperature of the current value, magnitude of voltage and the temperature-sensitive element that allow to pass through using preseting in the power supply system is prevented
During arc surge protective device, first electrode leading foot outer end 41 and second electrode leading foot outer end 51 are formed two external to draw
Pin is connected on phase line and the neutral conductor or ground wire；Responding to switch component connects to form normally closed work with voltage-sensitive component 3
State, surge protective device normal operating conditions.
Embodiment 2：
A kind of surge protective device, including inner casing 1, shell 2, voltage-sensitive component 3, electrode lead-out pins and responding to switch group
Part；Described inner casing 1 is closed-in construction, and inner casing 1 is provided with insulating wall 14, electrode hole 11 and fixed column 15；Described inner casing 1 with
Shell 2 is engaged by way of lock, when inner casing 1 is engaged with shell 2 by way of lock, forms two cavitys；It is described
Two cavitys be respectively the first cavity 1a and the second cavity 1b；The first described cavity 1a is in the front of inner casing 1；Described
Two cavity 1b are at the back side of inner casing 1；Described voltage-sensitive component 3 includes at least one voltage sensitive element；Described electrode
Leading foot includes first electrode leading foot 4 and second electrode leading foot；Described responding to switch component includes temperature-sensitive element, front
Electrode 31 and extension spring 6；Described insulating wall 14, fixed column 15 and responding to switch component is arranged in the first cavity 1a；Described
Voltage sensitive element is arranged in the second cavity 1b.
Described voltage sensitive element tow sides are respectively equipped with metal electrode film；Described front electrode 31 is located at wherein
On one metal electrode film, front electrode 31 is reached in the first cavity 1a by electrode hole 11 by the second cavity 1b, another
Metal electrode film is provided with backplate；Described backplate is placed in the second cavity 1b, and with the by way of soldering
The inner connection of two electrode lead-out pins.
First electrode leading foot is additionally provided with described inner casing 1 and stretches out groove 12 and second electrode leading foot stretching groove 13, its
Middle first electrode leading foot stretches out groove 12 and is located in the first cavity 1a, and second electrode leading foot stretches out groove 13 and is located at the second cavity 1b
It is interior；Described first electrode leading foot 4 includes first electrode leading foot outer end 41 and first electrode leading foot 4 is inner；Described
First electrode leading foot 4 is inner to be provided with pulling eye 42.
Described first electrode leading foot 4 is inner to be provided with the bending face of weld 44；The described bending face of weld 44 and front electrode 31
When face face is mutually touched, temperature-sensitive element welds the face of weld 44 is bent with front electrode 31；One end of described extension spring 6 connects with pulling eye 42
Connect, the other end is connected with fixed column 15.
Described voltage sensitive element is piezoresistor type sensing element.
Described temperature-sensitive element is meltable metal alloy solder.
The fusion temperature of the current value, magnitude of voltage and the temperature-sensitive element that allow to pass through using preseting in the power supply system is prevented
Arc surge protective device, voltage sensitive element are made because of leakage current caused by short-circuit overload current and its shelf-life aging on circuit
Into voltage sensitive element temperature rise, this temperature is delivered on front electrode 31, promotes temperature-sensitive element thereon to reach preset temperature
Threshold value and melt, under the pulling force effect of extension spring 6, first electrode leading foot 4 is inner to be separated with front electrode 31, and first electrode
The inner of leading foot 4 is pulled to the side of insulating wall 14, promotes to be formed between front electrode 31 and the inner of first electrode leading foot 4 and fills
The dielectric strength of foot, the electrical connection thoroughly completely cut off in surge protective device；Meanwhile prevent moment from fusing and produced when launching separation
Raw electric arc forms electrical breakdown and triggers short circuit overload；Now the working condition of responding to switch component is changed into normally opened from normally closed.
Claims (8)
1. a kind of surge protective device, including inner casing (1), shell (2), voltage-sensitive component (3), electrode lead-out pins and response are opened
Close component；It is characterized in that：Described inner casing (1) is closed-in construction, and inner casing (1) is provided with insulating wall (14), electrode hole (11)
With fixed column (15)；Described inner casing (1) is engaged with shell (2) by way of lock, when inner casing (1) and shell (2) pass through
When the mode of lock engages, two cavitys are formed；Two described cavitys are respectively the first cavity (1a) and the second cavity (1b)；
Described the first cavity (1a) is in the front of inner casing (1)；Described the second cavity (1b) is at the back side of inner casing (1)；Described electricity
Pressure sensing assembly (3) includes at least one voltage sensitive element；Described electrode lead-out pins include first electrode leading foot (4) and
Second electrode leading foot；Described responding to switch component includes temperature-sensitive element, front electrode (31) and extension spring (6)；Described is exhausted
Edge wall (14), fixed column (15) and responding to switch component are arranged in the first cavity (1a)；Described voltage sensitive element is set
In the second cavity (1b).
A kind of 2. surge protective device according to claim 1, it is characterised in that：Described voltage sensitive element positive and negative two
Face is respectively equipped with metal electrode film；Described front electrode (31) is located on one of metal electrode film, front electrode (31)
Reached by electrode hole (11) by the second cavity (1b) in the first cavity (1a), another metal electrode film is provided with back side electricity
Pole；Described backplate is placed in the second cavity (1b), and is connected by way of soldering with second electrode leading foot the inner.
A kind of 3. surge protective device according to claim 1, it is characterised in that：Is additionally provided with described inner casing (1)
One electrode lead-out pins stretch out groove (12) and second electrode leading foot stretches out groove (13), and wherein first electrode leading foot stretches out groove (12)
It is located in the first cavity (1a), second electrode leading foot stretches out groove (13) and is located in the second cavity (1b)；Described first electrode
Leading foot (4) includes first electrode leading foot outer end (41) and first electrode leading foot (4) is inner；Described first electrode is drawn
Pin (4) the inner is provided with pulling eye (42).
A kind of 4. surge protective device according to claim 1, it is characterised in that：Described first electrode leading foot (4)
The inner is provided with the bending face of weld (44)；When the described bending face of weld (44) is mutually touched with front electrode (31) face face, temperature-sensitive element will
The face of weld (44) is bent to weld with front electrode (31)；One end of described extension spring (6) is connected with pulling eye (42), the other end and fixation
Post (15) connects.
A kind of 5. surge protective device according to claim 1, it is characterised in that：Described voltage sensitive element is pressure-sensitive
Resistance-type sensing element or electric discharge tubular type sensing element or discharging gap formula sensing element.
A kind of 6. surge protective device according to claim 1, it is characterised in that：Described temperature-sensitive element is meltable gold
Belong to solder or conducting polymer.
A kind of 7. application of surge protective device according to any one of claims 1 to 6, it is characterised in that：In power-supply system
During the preventing arc surge protective device for the fusion temperature that middle use presets the current value, magnitude of voltage and the temperature-sensitive element that allow to pass through,
Two external pins that first electrode leading foot outer end (41) and second electrode leading foot outer end (51) are formed are connected to
In phase line and the neutral conductor or ground wire；Now, responding to switch component connects to form normally closed working condition with voltage-sensitive component (3),
As surge protective device normal operating conditions.
A kind of 8. application of surge protective device according to any one of claims 1 to 6, it is characterised in that：If voltage-sensitive
Element voltage sensitive element temperature rise caused by leakage current caused by short-circuit overload current and its shelf-life aging on circuit, this
Temperature is delivered on front electrode (31), promotes temperature-sensitive element thereon to reach preset temperature threshold value and melt, in extension spring (6)
Under pulling force effect, first electrode leading foot (4) the inner separates with front electrode (31), and first electrode leading foot (4) inner quilt
Move the side of insulating wall (14) to, promote to form the exhausted of abundance between front electrode (31) and first electrode leading foot (4) are inner
Edge intensity, the electrical connection thoroughly completely cut off in surge protective device；Meanwhile prevent moment from fusing and launch electricity caused by separation
Arc forms electrical breakdown and triggers short circuit overload；Now the working condition of responding to switch component is changed into normally opened from normally closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710753534.5A CN107528305A (en) | 2017-08-25 | 2017-08-25 | A kind of surge protective device and its application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710753534.5A CN107528305A (en) | 2017-08-25 | 2017-08-25 | A kind of surge protective device and its application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107528305A true CN107528305A (en) | 2017-12-29 |
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ID=60682566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710753534.5A Pending CN107528305A (en) | 2017-08-25 | 2017-08-25 | A kind of surge protective device and its application |
Country Status (1)
| Country | Link |
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| CN (1) | CN107528305A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112352470A (en) * | 2018-06-28 | 2021-02-09 | 昕诺飞控股有限公司 | Circuit board arrangement for protection against overvoltages and arcs |
-
2017
- 2017-08-25 CN CN201710753534.5A patent/CN107528305A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112352470A (en) * | 2018-06-28 | 2021-02-09 | 昕诺飞控股有限公司 | Circuit board arrangement for protection against overvoltages and arcs |
| CN112352470B (en) * | 2018-06-28 | 2023-08-11 | 昕诺飞控股有限公司 | Circuit board device for preventing overvoltage and arc |
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Legal Events
| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20171229 |
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| WD01 | Invention patent application deemed withdrawn after publication |