CN107359090A - A kind of protection device of anti-overcurrent and its application - Google Patents
A kind of protection device of anti-overcurrent and its application Download PDFInfo
- Publication number
- CN107359090A CN107359090A CN201710753535.XA CN201710753535A CN107359090A CN 107359090 A CN107359090 A CN 107359090A CN 201710753535 A CN201710753535 A CN 201710753535A CN 107359090 A CN107359090 A CN 107359090A
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- China
- Prior art keywords
- electrode
- leading foot
- protection device
- cavity
- voltage
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- 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.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/14—Electrothermal mechanisms
- H01H71/20—Electrothermal mechanisms with fusible mass
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/085—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current making use of a thermal sensor, e.g. thermistor, heated by the excess current
Abstract
The present invention discloses protection device and its application of a kind of anti-overcurrent, 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 protection device of anti-overcurrent 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, a kind of Novel electric as disclosed in Patent No. CN201410342761.5
Protection device is gushed, mainly including lightning protection component, current sensor, relay, signal detection driver element, thermel protection device, mistake
Stream protection device, current limiter and shell, the lightning protection component are connected with overcurrent protective device, form surge path；It is described
Thermel protection device is located on lightning protection component electrode；The current sensor is sleeved on surge path, output end access letter
Number detection driver element；The signal detection driver element output end is connected with Control pole；Relay normally open contact with
Lightning protection component both sides are parallel to after current limiter series connection.Current sensor of the present invention can sense the power frequency electric for flowing through lightning protection component
Stream, closes relay normally open contact, power current flows through overcurrent protective device, protects excessively stream by signal detection driver element
Protection unit disconnects.
The content of the invention
It is an object of the invention to overcome existing surge protection device lacking when overvoltage causes device short circuit overload
Fall into and insufficient, there is provided a kind of protection device of anti-overcurrent and its application, can fundamentally prevent disaster hidden-trouble so as to protect
Demonstrate,prove the safety of electronic equipment.
The technical solution adopted by the present invention is：
A kind of protection device of anti-overcurrent, including inner casing, shell, voltage-sensitive component, electrode lead-out pins and response are opened
Close component；Described inner casing is closed-in construction, and inner casing is provided with insulating wall, electrode hole and fixed column；Described inner casing and shell
Engaged by way of lock, when inner casing is engaged with shell by way of lock, form two cavitys；Two described chambers
Body is respectively the first cavity and the second cavity；The first described cavity is in the front of inner casing；The second described cavity is in inner casing
The back side；Described voltage-sensitive component includes at least one voltage sensitive element；Described electrode lead-out pins include first electrode
Leading foot and second electrode leading foot；Described responding to switch component includes temperature-sensitive element, front electrode and extension spring；Described is exhausted
Edge wall, fixed column 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 leading foot includes first electrode leading foot outer end and first electrode leading foot is inner；Described
First electrode leading foot the inner is provided with pulling eye.
Described insulating wall is provided with through hole；Described front electrode is provided with jack；Described through hole is corresponding with jack
Set；Described first electrode leading foot is inner stretch out through hole with after jack, temperature-sensitive element by first electrode leading foot it is inner with
Front electrode welds；One end of described extension spring is connected with pulling eye, and the other end is connected with fixed column.
As the further explanation of the present invention, described temperature-sensitive element is meltable metal alloy solder or conducting polymer
Thing.
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.
A kind of application of the protection device of described anti-overcurrent 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 the protection device of the anti-overcurrent of arc, two that first electrode leading foot outer end and second electrode leading foot outer end are formed are external
Pin is connected on phase line and the neutral conductor or ground wire；Now, responding to switch component connects to be formed often with voltage-sensitive component
Close working condition, the protection device normal operating conditions of as anti-overcurrent.
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 the protection device of anti-overcurrent；Meanwhile prevent moment from fusing and launch electric arc caused by separation
Form electrical breakdown and trigger short circuit overload；Now the working condition of responding to switch component by it is normally closed be changed into it is normally opened.
The beneficial effect that the present invention possesses：
1st, the protection device of anti-overcurrent of the invention has the defencive function of overvoltage short circuit overload moment ejection separation
With 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.
Marked in figure：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, 141, through hole, 15, fixed column；1a, the first cavity, 1b, the second cavity, 2, shell, 3, voltage-sensitive group
Part, 31, front electrode, 311, jack, 4, first electrode leading foot, 41, first electrode leading foot outer end, 42, pulling eye, 51,
Two electrode lead-out pins outer ends, 6, extension spring.
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 protection device of anti-overcurrent, including inner casing 1, shell 2, voltage-sensitive component 3, electrode lead-out pins and response
Switch module；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 is engaged with shell 2 by way of lock, when inner casing 1 is engaged with shell 2 by way of lock, forms two chambers
Body；Two described cavitys are respectively the first cavity 1a and the second cavity 1b；The first described cavity 1a is in the front of inner casing 1；
The second described cavity 1b is at the back side of inner casing 1；Described voltage-sensitive component 3 includes at least one voltage sensitive element；Institute
The electrode lead-out pins stated 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 insulating wall 14, fixed column 15 and responding to switch component is arranged on the first cavity 1a
It is interior；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；Institute
The inner of first electrode leading foot 4 stated is provided with pulling eye 42.
Described insulating wall 14 is provided with through hole 141；Described front electrode 31 is provided with jack 311；Described through hole
141 are correspondingly arranged with jack 311；After the inner stretching through hole 141 of described first electrode leading foot 4 and jack 311, temperature-sensitive element
The inner of first electrode leading foot 4 is welded with front electrode 31；One end of described extension spring 6 is connected with pulling eye 42, the other end with
Fixed column 15 connects.
Described temperature-sensitive element is meltable metal alloy solder.
Described voltage sensitive element is piezoresistor type sensing element.
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 the protection device of the anti-overcurrent of arc, first electrode leading foot outer end 41 and second electrode leading foot outer end 51 are formed two
External pin is connected on phase line and the neutral conductor or ground wire；Now, responding to switch component is connected shape with voltage-sensitive component 3
Into normally closed working condition, the protection device normal operating conditions of as anti-overcurrent.
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 31, promote 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 is drawn
The inner of pin 4 is pulled to the side of insulating wall 14, promotes to form abundance between front electrode 31 and the inner of first electrode leading foot 4
Dielectric strength, the electrical connection thoroughly completely cut off in the protection device of anti-overcurrent；Meanwhile when preventing moment from fusing and launching separation
Caused electric arc forms electrical breakdown and triggers short circuit overload；Now the working condition of responding to switch component by it is normally closed be changed into it is normally opened.
Embodiment 2：
A kind of protection device of anti-overcurrent, including inner casing 1, shell 2, voltage-sensitive component 3, electrode lead-out pins and response
Switch module；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 is engaged with shell 2 by way of lock, when inner casing 1 is engaged with shell 2 by way of lock, forms two chambers
Body；Two described cavitys are respectively the first cavity 1a and the second cavity 1b；The first described cavity 1a is in the front of inner casing 1；
The second described cavity 1b is at the back side of inner casing 1；Described voltage-sensitive component 3 includes at least one voltage sensitive element；Institute
The electrode lead-out pins stated 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 insulating wall 14, fixed column 15 and responding to switch component is arranged on the first cavity 1a
It is interior；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；Institute
The inner of first electrode leading foot 4 stated is provided with pulling eye 42.
Described insulating wall 14 is provided with through hole 141；Described front electrode 31 is provided with jack 311；Described through hole
141 are correspondingly arranged with jack 311；After the inner stretching through hole 141 of described first electrode leading foot 4 and jack 311, temperature-sensitive element
The inner of first electrode leading foot 4 is welded with front electrode 31；One end of described extension spring 6 is connected with pulling eye 42, the other end with
Fixed column 15 connects.
Described temperature-sensitive element is meltable conducting polymer.
Described voltage sensitive element is electric discharge tubular type sensing element.
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 the protection device of the anti-overcurrent of arc, first electrode leading foot outer end 41 and second electrode leading foot outer end 51 are formed two
External pin is connected on phase line and the neutral conductor or ground wire；Now, responding to switch component is connected shape with voltage-sensitive component 3
Into normally closed working condition, the protection device normal operating conditions of as anti-overcurrent.
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 31, promote 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 is drawn
The inner of pin 4 is pulled to the side of insulating wall 14, promotes to form abundance between front electrode 31 and the inner of first electrode leading foot 4
Dielectric strength, the electrical connection thoroughly completely cut off in the protection device of anti-overcurrent；Meanwhile when preventing moment from fusing and launching separation
Caused electric arc forms electrical breakdown and triggers short circuit overload；Now the working condition of responding to switch component by it is normally closed be changed into it is normally opened.
Claims (9)
1. a kind of protection device of anti-overcurrent, including inner casing (1), shell (2), voltage-sensitive component (3), electrode lead-out pins and
Responding to switch 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) and fixed column (15)；Described inner casing (1) is engaged with shell (2) by way of lock, when inner casing (1) and shell
(2) when being engaged by way of lock, two cavitys are formed；Two described cavitys are respectively the first cavity (1a) and the second chamber
Body (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)；Institute
The voltage-sensitive component (3) stated includes at least one voltage sensitive element；Described electrode lead-out pins are drawn including first electrode
Pin (4) and second electrode leading foot；Described responding to switch component includes temperature-sensitive element, front electrode (31) and extension spring (6)；Institute
Insulating wall (14), fixed column (15) and the responding to switch component stated are arranged in the first cavity (1a)；Described voltage-sensitive member
Part is arranged in the second cavity (1b).
A kind of 2. protection device of anti-overcurrent according to claim 1, it is characterised in that：Described voltage sensitive element
Tow sides are respectively equipped with metal electrode film；Described front electrode (31) is located on one of metal electrode film, front electricity
Pole (31) is reached in the first cavity (1a) by electrode hole (11) by the second cavity (1b), and another metal electrode film is provided with
Backplate；Described backplate is placed in the second cavity (1b), and by way of soldering and in second electrode leading foot
End connection.
A kind of 3. protection device of anti-overcurrent according to claim 1, it is characterised in that：On described inner casing (1) also
Groove (12) is stretched out provided with first electrode leading foot and second electrode leading foot stretches out groove (13), and wherein first electrode leading foot stretches out
Groove (12) is located in the first cavity (1a), and second electrode leading foot stretches out groove (13) and is located in the second cavity (1b).
A kind of 4. protection device of anti-overcurrent according to claim 1, it is characterised in that：Described first electrode is drawn
Pin (4) includes first electrode leading foot outer end (41) and first electrode leading foot (4) is inner；Described first electrode leading foot
(4) it is inner to be provided with pulling eye (42).
A kind of 5. protection device of anti-overcurrent according to claim 1, it is characterised in that：On described insulating wall (14)
Provided with through hole (141)；Described front electrode (31) is provided with jack (311)；Described through hole (141) and jack (311) is right
It should set；After the inner stretching through hole (141) of described first electrode leading foot (4) and jack (311), temperature-sensitive element is electric by first
Pole leading foot (4) is inner to be welded with front electrode (31)；One end of described extension spring (6) is connected with pulling eye (42), the other end with
Fixed column (15) connects.
A kind of 6. protection device of anti-overcurrent according to claim 1, it is characterised in that：Described temperature-sensitive element is easy
Molten metal alloy solder or conducting polymer.
A kind of 7. protection device of anti-overcurrent according to claim 1, it is characterised in that：Described voltage sensitive element
For piezoresistor type sensing element or electric discharge tubular type sensing element or discharging gap formula sensing element.
A kind of 8. application of the protection device of anti-overcurrent according to any one of claims 1 to 7, it is characterised in that：In electricity
The anti-overcurrent of preventing arc of the fusion temperature of the current value, magnitude of voltage and the temperature-sensitive element that allow to pass through using preseting in the system of source
During protection device, by first electrode leading foot outer end (41) and two external pins of second electrode leading foot outer end (51) composition
It is connected on phase line and the neutral conductor or ground wire；Now, responding to switch component connected with voltage-sensitive component (3) to be formed it is normally closed
Working condition, the protection device normal operating conditions of as anti-overcurrent.
A kind of 9. application of the protection device of anti-overcurrent according to any one of claims 1 to 7, it is characterised in that：It is if electric
Pressure-sensitive sensing unit voltage sensitive element temperature caused by leakage current caused by short-circuit overload current and its shelf-life aging on circuit
Rise, this temperature is delivered on front electrode (31), promotes temperature-sensitive element thereon to reach preset temperature threshold value and melt, drawing
Under the pulling force effect of spring (6), first electrode leading foot (4) the inner separates with front electrode (31), and first electrode leading foot (4)
The inner is pulled to the side of insulating wall (14), promotes to be formed between front electrode (31) and first electrode leading foot (4) are inner and fills
The dielectric strength of foot, the electrical connection thoroughly completely cut off in the protection device of anti-overcurrent；Meanwhile prevent moment from fusing and launch point
Electrical breakdown, which is formed, from caused electric arc triggers short circuit overload；Now the working condition of responding to switch component is changed into often by normally closed
Open.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710753535.XA CN107359090A (en) | 2017-08-25 | 2017-08-25 | A kind of protection device of anti-overcurrent and its application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710753535.XA CN107359090A (en) | 2017-08-25 | 2017-08-25 | A kind of protection device of anti-overcurrent and its application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107359090A true CN107359090A (en) | 2017-11-17 |
Family
ID=60289654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710753535.XA Pending CN107359090A (en) | 2017-08-25 | 2017-08-25 | A kind of protection device of anti-overcurrent and its application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107359090A (en) |
-
2017
- 2017-08-25 CN CN201710753535.XA patent/CN107359090A/en active Pending
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20171117 |