CN109243939A - A kind of low-power consumption high response speed circuit protection device - Google Patents
A kind of low-power consumption high response speed circuit protection device Download PDFInfo
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- CN109243939A CN109243939A CN201810982439.7A CN201810982439A CN109243939A CN 109243939 A CN109243939 A CN 109243939A CN 201810982439 A CN201810982439 A CN 201810982439A CN 109243939 A CN109243939 A CN 109243939A
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- 230000009471 action Effects 0.000 claims abstract description 34
- 230000001960 triggered effect Effects 0.000 claims abstract description 4
- 229910052751 metal Inorganic materials 0.000 claims description 35
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- 230000008018 melting Effects 0.000 claims description 10
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- 239000000203 mixture Substances 0.000 claims description 8
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
-
- 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
Landscapes
- Fuses (AREA)
Abstract
A kind of low-power consumption high response speed circuit protection device comprising insulation shell and the electric conductor through the insulation shell, it is characterised in that be connected on the electric conductor in the detection unit；The motor unit includes concatenated current limiting element and action element；The motor unit is in parallel with detection unit；The action element is arranged in the cavity of electric conductor described in face；When being overloaded by protection main circuit, detection unit and motor unit both end voltage in parallel therewith are increased rapidly, are triggered the action element movement and are cut off the electric conductor disconnection main circuit.The structure anti-overload ability is strong, and disjunction is rapid, and temperature rise is low in energy consumption, high reliablity.
Description
Technical field
The present invention relates to power circuits to protect field, fuse and breaker functional area.
Background technique
Existing fuse melts/evaporates specific part electric conductor by current heating by melt come disconnecting circuit, Chang Li
Multiple series connection fractures raising disjunction voltages are generated with variable cross-section or other modes, especially in larger (such as the tens of amperes of electric current
More than), in the circuit system of voltage higher (such as 200V or more).And multiple fractures need to connect, and one is needed between fracture
Determine gap length (otherwise just ganging up into a fracture), multi-break structural resistance is big, and having that energy consumption is high, temperature increases, due to tolerance electricity
Stream fever and breaking current are exothermic melting, all originate from the electric current for flowing through fuse, the protection device of this type can not have
Larger rated current or the stronger short-time overload/dash current of tolerance (such as the electricity big in short-term when electric car starting or climbing
Stream) under conditions of, reach the sufficiently fast breaking speed of certain amplitude fault current, or sufficiently fast in certain amplitude fault current
Protection velocity conditions under, realize higher nominal electric current, or the biggish overload/dash current of tolerance without damaging.
For existing fuse after the generation of melt fracture, the extinguishing of electric arc passes through current heating dependent on metal material at narrow neck
Fusing/evaporation utilizes arc-extinguishing medium arc extinguishing to keep electric gap elongated.There are low power overload currents to need long period ability energy product
Tired heat movement, overlong time and excessively heating arc-extinguishing medium are right the problem of causing disjunction arc extinguishing unreliable or be difficult to disjunction
In DC circuit, this problem is especially prominent.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of low-power consumption high response speed protective devices, both can satisfy
It is resistant to the overload and impact of some strength, and cracking breaking speed (several milliseconds) can be provided, is guaranteeing the same of reliable disjunction
When can satisfy miniaturization, low-power consumption demand again.
In order to solve the above technical problems, technical solution provided by the invention is a kind of low-power consumption high response speed circuit protection
Device comprising insulation shell and the electric conductor through the insulation shell, it is characterised in that be connected in the detection unit
On the electric conductor；The motor unit includes concatenated current limiting element and action element；The motor unit and detection unit
It is in parallel；The action element is arranged in the cavity of electric conductor described in face；When being overloaded by protective loop, detection unit and
Motor unit both end voltage in parallel increases rapidly therewith, triggers the action element movement and cuts off the main electricity of the electric conductor disconnection
Road.
It is provided with structural strength weak spot on the electric conductor of the action element side, it is strong in the structure of the electric conductor
It is provided on shell below degree weak spot and accommodates the cavity that the electric conductor disconnection is fallen.
Multi-disc is provided in the cavity for cooling down, separating the grating structure of electric arc.
Pressure limiting filter device is offered on the shell for accommodating the cavity side that the electric conductor is fallen.
The pressure limiting filter device includes the gas vent being arranged in housing sidewall, is provided with pressure maintaining in the gas vent
Diaphragm and filter screen.
At least one arc extinguishing is parallel at the structural strength weak spot both ends of the electric conductor of the action element side
Fuse.
When detection unit does not protect shell and arc-extinguishing medium, the detection unit both ends need at least one arc extinguishing in parallel
Fuse.
It is one or more of fuse, thin wire or low-melting-point metal conducting wire in the current limiting element.
The detection unit is that can disconnect in the case where being overloaded by protective loop or detection conductive structure that resistance becomes larger.
The detection unit includes two conductive connections rows, the connecting pin of the two connection rows by variable cross-section electric conductor,
Low-melting-point metal, PTC material or conductive memory metal connection；
It is spaced apart at the most narrow place of variable cross-section electric conductor junction and is equipped with open-work.
The surface of the variable cross-section electric conductor is provided with the metallurgical effect point of low-melting-point metal composition.
The detection unit includes two conductive connection rows, and it is convex to be respectively arranged with insulation on the joint face of the two connection rows
Point coats low melting point conductive metal in the insulation salient point periphery, and the joint face of the two connection rows is superimposed docking, by thereon
The insulation salient point at low melting point conductive metal connection.
The detection unit includes two conductive connection rows, and the joint face of the two connection rows is superimposed, and passes through low melting point
Conductive metal connection is provided with insulation limiting device on the wherein joint face of a connection row of superposition docking.
The detection unit is provided with protection shell.
Arc-extinguishing medium is filled in the protection shell.
The action element is electricity triggering gas generating unit, and the gas generating unit includes two lead terminals and pyrotechnics
Coyote hole, two described lead terminal one end connect by heating wire or are provided in its end electrode close to each other；The other end point
It is not connect with one end of described current limiting element one end and detection unit；Lead terminal heating wire end or electrode tip are arranged in cigarette
In powder chamber.
Piston, the piston and the gas are provided in chamber between the gas generating unit and the electric conductor
Space between body generating device is sealing space；Piston limit structure is provided in the chamber.
The action element is fixed on insulation shell by cover board.
The end that connects of the arc extinguishing fuse is provided with temperature sensing device, when temperature sensing device room temperature is state of insulation, when
When overloading high temperature, the temperature sensing device conducting；The temperature sensing device is molten by its distance or insulation temperature sensing material away from heat generating spot
Point difference, connects each temperature sensing device in a designated order.
The temperature sensing device includes two electric conductors, is provided with pressing device on an electric conductor wherein；In the electric conductor
Between be provided with insulation temperature sensing material；It is insulation solid-state under the insulation temperature sensing material room temperature, insulate temperature-sensitive when overloading high temperature
Material fusing, two electric conductors can be connected under pressing device effect.
The structural strength weak spot of the electric conductor is at least one opened up at electric conductor above and below interval
Through the groove of the conductive board width.
The groove shapes are U-shaped, V-type or trapezium structure.
The structural strength weak spot of the electric conductor is that the electric conductor is broken as to two parts, described in two parts of disconnection
The joint face of electric conductor is superimposed docking up and down, and lower superposition is connected at face on it is fixed by solder joint, bonding or riveting.
The structural strength weak spot of the electric conductor is that the electric conductor is broken as to two parts, and two parts of disconnection are conductive
There are gaps between body, are fixedly connected in the upper surface of described gap or below by the row of conductive connection by solder joint, bonding, riveting.
The structural strength weak spot of the electric conductor is that the electric conductor is broken as to two parts, and two parts of disconnection are conductive
There are gaps between body, and conductive connection row is crimped with above the gap.
It is provided with arc-chute in the cavity of the lower section of the conductor construction strength weak point and air-flow guides partition, institute
On the side wall for stating the insulation shell that pressure limiting filter device is located at the arc-chute side.
Circuit protection device of the invention accesses major loop by electric conductor to be caused to detect when major loop overload/short circuit
Unit both end voltage increases rapidly, directly drives motor unit and generates enormous impact force impact conductor construction strength weak point,
It disconnects electric conductor i.e. at weak location, disconnects main circuit.Extinguishing electric arc by arc-control device, (arc extinguishing fuse arc extinguishing goes out
Arc grid arc extinguishing and gas blow electric arc).And signal detection, cutting circuit, arc extinguishing are completed by special device.Its is overload-resistant
Ability is strong, and disjunction is rapid, and temperature rise is low in energy consumption, high reliablity.
Detailed description of the invention
Fig. 1, surface structure schematic diagram of the present invention.
Fig. 2, longitudinal direction schematic cross-sectional view of the present invention.
Fig. 3, the present invention remove the schematic perspective view after upper housing.
Fig. 4, structural schematic diagram after motor unit movement of the present invention.
Fig. 5, the longitudinal schematic cross-sectional view of the present invention with piston.
Fig. 6, temperature sensing device structural schematic diagram.
Fig. 7, a kind of structural schematic diagram of detection unit.
Fig. 8, detection unit another kind frame mode schematic diagram.
Fig. 9, detection unit another kind frame mode schematic diagram.
Figure 10, detection unit another kind frame mode schematic diagram.
Figure 11, detection unit another kind frame mode schematic diagram.
Figure 12, electric conductor various structures strength weak point structure schematic diagram.
Figure 13, gas generating unit structural schematic diagram.
Figure 14, gas generating unit structural schematic diagram.
Figure 15, gas generating unit structural schematic diagram.
Specific embodiment
Scheme in view of the above technology is now lifted preferred embodiment and is specifically described in conjunction with diagram.Low-power consumption of the invention
High response speed circuit protection device, mainly including shell, conductive plate, detection unit, motor unit, wherein.
Shell 10, referring to Fig. 1, material is isolation material.The conduction through 10 both ends of shell is provided between shell
Body (20,21), there are gaps between electric conductor (20,21).The part that conductive plate is located at outside shell two sides offer on it for
The connecting hole of external main circuit connection.Fig. 2, Fig. 3 are offered on the upper housing 11 above conductive plate and are offered respectively for detection
Unit 31 and motion detection circuit accommodating cavity 11, for motor unit accommodating cavity.Detection unit 31 is arranged in electric conductor
On the gap location of (20,21), and it is separately connected therewith, for detecting the variation of current/voltage, both ends of detection unit 31 and dynamic
Make unit to connect by conducting wire (42,43).It is spaced apart and is set there are two connection terminal on the electric conductor side at detection unit both ends,
In the present embodiment, which is integrated with electric conductor.Arc extinguishing fuse 62 is connected on connection terminal, i.e.,
Detection unit 31 is connect with arc extinguishing fuse 62 in parallel connection.When detection unit has arc-suppression function, arc extinguishing fuse 62
It can also cancel and be not provided with.Detection unit, arc extinguishing fuse 62, fuse 71, conducting wire (42,43) are largely all located at upper housing
Same cavity in.Arc extinguishing fuse 62 is for extinguishing the electric arc that detection unit generates in fracture forming process；Arc extinguishing fusing
Device 62 can both be located at enclosure interior, can also be located at hull outside.Chamber where chamber and detection unit where motor unit
Room is to be disposed adjacent, but be not connected to, and conducting wire (42,43) is connected with corresponding component respectively after the side wall of two adjacent chambers.
Detection unit 31, structure are a kind of change-section conductor sealing structure.See that Fig. 7, change-section conductor 093 are section
The junction of conductive connection row (091,092) is arranged in the gradually smaller variable section structure of width, and even with its conduction
It connects, connection type includes but is not limited to weld, crimp, elastic connection.Variable cross-section electric conductor 093 is being passed through overload/short circuit electricity
The lesser part fever fusing in its middle section after stream.In order to improve device performance, opened up at the most narrow place interval of variable cross-section electric conductor
There are several open-works.Detection unit is connect by the row of connection with conductive plate.For fusing of preferably generating heat, in variable cross-section electric conductor 93
111 layers of low-melting-point metal layer are also provided on surface, low-melting-point metal includes but is not limited to tin, lead, bismuth and above-mentioned metal
It reduces fusing point it acts as metallurgical effect point is formed with variable cross-section electric conductor 093 with the alloy of other metals and increases resistance.For
The junction of connection row (091,092) and variable cross-section electric conductor 093 is arranged in shell 094 better arc extinguishing, and in shell
Arc extinguishing is carried out filled with arc-extinguishing medium in 094.In this way, do not increase shell and fill arc-extinguishing medium connection row (091,092) and
The connection row (091,092) and change that variable cross-section electric conductor 093 can be used as melt to treat, with shell and filled with arc-extinguishing medium
Section electric conductor 093 can then regard similar fuse structure as, but as detection unit, not undertake fuse function.That is,
Detection unit can be melt, can be similar fuse structure.Work as current overload, detection unit fusing or resistance increase suddenly
Greatly, the movement of electric signal drive actions unit is provided for motor unit.When detection unit is that melt does not have arc extinguishing effect, then exist
Detection unit side parallel connection arc extinguishing fuse or arc-control device carry out arc extinguishing.
It can also realize that signal is triggered as connection by setting low-melting-point metal in the junction of connection row.Referring to figure
8, insulation salient point 153 is first provided at the joint face of two connection rows (151,152), it is then low in the periphery cladding of insulation salient point
Melting point metals 154 make connection row (151,152) connection, when current/voltage increases, after eutectic breakpoint metal melt flows away,
Insulation salient point 153 is in contact, realizes and disconnect under gravity (or under external springs power or the effect of its other active force).It can also be with
It is the structure type of Fig. 9, is first provided with low-melting-point metal salient point 163 at the joint face of two connection rows (161,162), makes two low
Melting point metals salient point two docks, the setting insulation limited block 164 on the connection row 161 of low-melting-point metal side.In current/voltage
When increase, after eutectic breakpoint metal melt collapses, under the effect of gravity (or under external springs power or the effect of its other active force)
Connection 161 downward actuations of row, 164 row of being connected 162 of limited block of insulating are not connected to connection row 161 and connection row 162, real
Now disconnect.
It can also be Figure 10 structure, realize load with the both ends that low-melting-point metal 173 is directly connected to connection row (171,172)
It is disconnected after overload/short circuit current；Or the structure of Figure 11, connection row (181,182) is directly connected to PTC material 183
Both ends.The heat that temperature increases that detection structure resistance increases or electric current generates when electric current increases burns filler.Cause
Detection structure disconnects or resistance increases suddenly.Low melting point metal material includes but is not limited to tin, lead, bismuth and above-mentioned metal and its
The alloy of its metal.PTC material includes but is not limited to the alloy materials such as constantan, copper-manganese and thermal sensitive ceramic material.
Detection unit can also be that two electric conductors are connected by certain shape memory metal.It is lower than setting value in electric current
When, memory metal shape satisfaction makes the connection conducting of two electric conductors, and when passing through larger current, memory metal temperature is increased, metal shape
Shape is restored to the shape of the condition of high temperature, separates two electric conductors, realizes that two electric conductors disconnect.Under normal conditions, the memory gold
Belong to shape and connection row is connected, overloaded when by protective loop, when the memory metal condition of high temperature, then memory metal shape, which meets, breaks
Open the connection of the two connection rows.The structure of above-mentioned each detection unit can also be actually needed and be applied in combination with single use.
Motor unit, including concatenated current limiting element 71, action element 41；Concatenated current limiting element and action element and inspection
It is in parallel to survey unit；One end of detection unit is connect with action element one end, and the other end is connect with current limiting element one end；Action element
Cavity one end of face electric conductor is arranged in part；When by protection circuit overloads, i.e., when current/voltage overloads, detection unit is disconnected
It opens or resistance increases, so that electric current moment between the lead terminal of action element is increased trigger action element movement, cutting electric conductor is disconnected
Open main circuit.Arc extinguishing fuse 62 is connected in parallel with detection unit, and current limiting element and the concatenated circuit of action element and arc extinguishing melt
The both ends in parallel of disconnected device and detection unit are separately connected.In the present embodiment, current limiting element 71 is fuse, also be can be used
Thin wire (thin wire refers to thinner than connecting wire) or low-melting-point metal conducting wire replace.It is single that action element 41 is set to detection
The adjacent chamber of chamber where first, and be fixed on insulation shell by cover board 12 and its place chamber.Action element
It can be fixed on insulation shell by bonding, screw thread or other modes.It is electric conductor below chamber where action element, dynamic
Make to offer the chamber fallen for electric conductor on the shell of the lower section of the electric conductor below element.The chamber is cavity, can also be with
Setting has compressional insulating materials in the chamber, and when electric conductor is fallen, the insulating materials of compressibility is impacted, can
Slow down and fall impulse force, shell is protected.It is thin that structural strength is provided on the electric conductor where action element below chamber
Weakness 23.Structural strength weak spot 23 can be and distinguish in electric conductor above and below referring to several structure types in Figure 12
One or more disconnection grooves are opened up, disconnecting groove shapes can be U-shaped, V-type, trapezoidal or other structures.It is also possible to disconnect
Electric conductor up and down be superimposed, by solder joint connect reduce bonding strength, can be the electric conductor of disconnection, and formed between cleaved facet
Then gap is connected below cleaved facet by connecting plate, connecting plate and electric conductor are conductive by the reduction of several welded connectings
Plate bonding strength.The stain that junction is disconnected in figure is solder joint.Or at the open gap above connecting plate is set, passing through spring will
Gusset piece is crimped at open gap the bonding strength for reducing the connection of electric conductor gap by electric conductor.Above-mentioned electric conductor it is various
Its purpose of the structural strength weak spot of structure is exactly to reduce to lead in the case where meeting electric conductor connection conducting in normal state
The bonding strength of electric body, makes it in chance failure, is easy to disconnect at the structural strength weak spot of electric conductor.
Arc extinguishing fuse 61 is connected in parallel in the side of the structural strength weak spot 23 of electric conductor.Can one in parallel go out
Arc fuse 61 also can according to need more in parallel.The effect of arc extinguishing fuse 61 is to extinguish electric conductor strength weak point off
Electric arc at mouthful.Arc extinguishing fuse can not have to, such as when arc energy is smaller or current/voltage trigger action unit movement speed
When spending sufficiently fast.Arc extinguishing fuse 61, arc extinguishing fuse 62 both ends tie point at, setting insulation temperature-sensitive point, insulation feel
Temperature sensing device 63 is set at warm spot.Temperature sensing device 63 is slab construction, is arranged above conductor referring to Fig. 6, including conductor 631
There is conductive contact block 632, insulation temperature-sensitive substance 633 is provided between conductor 631 and conductive contact block 632, is allowed insulated from each other.Insulation
Temperature-sensitive substance is solid-state at normal temperature, after temperature reaches a certain value its can melt or gasify (including point be not limited to the overwhelming majority
Thermoplastic plastic, hydrocarbons).It is provided with spring 633 above conductive contact block 632, is set in the periphery of conductive contact block and spring
It is equipped with shell, at normal temperature, spring is in compressive state.Being connected on the top of conductive contact block can be with the conducting wire of external connection
634.Temperature sensing device at each insulation temperature-sensitive point is connected by conducting wire.
When electric current becomes larger, when the temperature at temperature sensing device is increased to the temperature of insulation temperature-sensitive matter melts or gasification, insulation
Temperature-sensitive substance then melts or gasifies, at this point, conductive contact block pushes back downwards under the action of the spring, keeps conductive contact block and conductor close
Contact is to connect related circuit.Temperature sensing device 63 is state of insulation under normal conditions.Therefore when device works normally, arc extinguishing is returned
There is no electric current to pass through in road and action triggers circuit, ensure that the safety of device (can also increase this in motor unit circuit
Temperature-sensitive point).By adjusting the difference of the fusing point of insulation distance and insulation filler of the temperature-sensitive point away from sites of heat generation, make wherein every
A blow-out circuit is connected according to preset optimal sequence.Temperature sensing device is also possible to after temperature-sensitive thin film applies between two conductors
It is connect with the electric conductor in shell, or temperature-sensitive thin film is set between conductor and the electric conductor of shell.Under normal conditions, temperature-sensitive thin film
For state of insulation, then circuit is not turned on, and when overloading high temperature, temperature-sensitive thin film is conduction state, and circuit is connected.
Action element 41 is that a kind of current/voltage triggers gas generating unit, and referring to Fig. 4, which inputs in input terminal
When certain current/voltage, inner material occurs rapidly chemical reaction and generates a large amount of high pressure gas, directly thrusts or push quality
Block interrupts the structural strength weak spot 23 of pre-set electric conductor, and the electric conductor after disconnection falls in the chamber 13 into lower case
It falls.Compressibility insulating materials, such as glass fiber material can be filled in chamber 13, in this way, when electric conductor disconnection is fallen in chamber 13
When, there is cushion effect, impact injury will not be caused to lower case.
Gas generating unit generally comprises a combustion chamber, in a combustion chamber there are two setting lead terminal (201,202),
And pyrotechnics coyote hole 203, the effect of pyrotechnic composition is that burning generates bulk gas at a certain temperature, close to heating wire or electricity
Pole.Pyrotechnic composition includes but is not limited to explosive and gunpowder.The gas generating unit of current trigger are as follows: on the basis of the said structure
One end of lead is by one section of heating wire connection 204, referring to Figure 14, the electrothermal wire heating when passing through a constant current, and pyrotechnic composition quilt
Cause；It is to connect two very close electrodes of distance 205 on lead (lead itself also to can be used and replace electricity there are also a kind of structure
Pole), after voltage reaches a certain value, electric arc is generated between electrode, pyrotechnic composition is initiated, referring to shown in Figure 15.
The mass block 244 that one lower section is insulating materials, the mass block and seal chamber are set below gas generating unit
Piston-cylinder assembly is formed, referring to Fig. 5.The device when input terminal inputs certain current/voltage, send out rapidly by inner material
Biochemical reaction generates a large amount of high pressure gas, and high pressure gas pushes mass block movement, it is weak to interrupt pre-set structural strength
Point disconnects electric conductor.In order to fix mass block initial position, it is arranged on the indoor side wall of seal chamber where mass block
There is limit point.
Pressure limiting filter device 51 is provided on lower case shell wall, structure is that gas vent, row is arranged in lower casing body sidewall
Stomata is provided with pressure maintaining diaphragm and filter screen, and after air pressure reaches certain value in device, pressure maintaining membrane ruptures, gas is through filtering
It is discharged after net filtration.
Working principle: whole device is needed in circuit to be protected by the access of electric conductor 20 and 21, when electric conductor was passed through
When load or short circuit current, detection unit specific part disconnection (such as connection row junction) or resistance is caused to increase rapidly.Together
When detection unit inside the arc-extinguishing medium filled can extinguish its internal electric arc generated during this, and provide one it is opposite
Closed environment.When detection unit itself does not have arc-suppression function, mistake that the arc extinguishing fuse of both ends parallel connection is formed in fracture
It starts to work in journey, extinguishes the electric arc that incision position is formed.Detection unit both end voltage, which increases rapidly, at this time causes action element (electricity
Stream/voltage triggered gas generating unit) lead terminal between current/voltage increase rapidly, make the lead terminal other end generate
High startup temperature pyrotechnic composition generates high pressure gas, pushes mass block movement to interrupt the structural strength weak spot in electric conductor, makes conduction
Body disconnects from structural strength weak spot, and rotates in the cavity into lower case along inflection point and take；Meanwhile with conduction
The arc extinguishing fuse of body fracture parallel connection is started to work, and makes main circuit current with relative smooth simultaneously arc extinction between electric conductor
Rate decline avoids influence and generation electromagnetic interference influence to other equipment of the electric current change dramatically to circuit.
Claims (27)
1. a kind of low-power consumption high response speed circuit protection device comprising insulation shell and the conduction through the insulation shell
Body, it is characterised in that be connected on the electric conductor in the detection unit；The motor unit includes concatenated current limiting element
With action element；The motor unit is in parallel with detection unit；The cavity of electric conductor described in face is arranged in the action element
In；When being overloaded by protective loop, detection unit and motor unit both end voltage in parallel therewith are increased rapidly, described in triggering
Action element movement cuts off the electric conductor and disconnects main circuit.
2. low-power consumption high response speed circuit protection device according to claim 1, it is characterised in that in the action element
It is provided with structural strength weak spot on the electric conductor of part side, is set on shell below the structural strength weak spot of the electric conductor
It is equipped with and accommodates the cavity that the electric conductor disconnection is fallen.
3. low-power consumption high response speed circuit protection device according to claim 2, it is characterised in that set in the cavity
Multi-disc is equipped with for cooling down, separating the grating structure of electric arc.
4. low-power consumption high response speed circuit protection device according to claim 2, it is characterised in that lead described in the receiving
Pressure limiting filter device is offered on the shell for the cavity side that electric body is fallen.
5. low-power consumption high response speed circuit protection device according to claim 4, it is characterised in that the pressure limiting filtering
Device includes the gas vent being arranged in housing sidewall, and pressure maintaining diaphragm and filter screen are provided in the gas vent.
6. low-power consumption high response speed circuit protection device according to claim 1, it is characterised in that in the action element
The structural strength weak spot both ends of the electric conductor of part side are parallel at least one arc extinguishing fuse.
7. low-power consumption high response speed circuit protection device according to claim 1, it is characterised in that do not have in detection unit
When having protection shell and arc-extinguishing medium, the detection unit both ends need at least one arc extinguishing fuse in parallel.
8. low-power consumption high response speed circuit protection device according to claim 1, it is characterised in that in the current limliting member
Part is one or more of fuse, thin wire or low-melting-point metal conducting wire.
9. low-power consumption high response speed circuit protection device according to claim 1, it is characterised in that the detection unit
For the detection conductive structure that can be disconnected in the case where being overloaded by protective loop or resistance becomes larger.
10. low-power consumption high response speed circuit protection device according to claim 9, it is characterised in that the detection unit
Including two conductive connection rows, the connecting pin of the two connection rows passes through variable cross-section electric conductor, low-melting-point metal, positive temperature coefficient
Material or conductive memory metal connection.
11. low-power consumption high response speed circuit protection device according to claim 10, it is characterised in that cut in described become
The most narrow place of face electric conductor junction, which is spaced apart, is equipped with open-work.
12. low-power consumption high response speed circuit protection device according to claim 10, it is characterised in that cut in described become
The surface of face electric conductor is provided with the metallurgical effect point of low-melting-point metal composition.
13. low-power consumption high response speed circuit protection device according to claim 9, it is characterised in that the detection unit
Including two conductive connection rows, it is respectively arranged with insulation salient point on the joint face of the two connection rows, outside the insulation salient point
Coat low melting point conductive metal week, the joint face of the two connection rows is superimposed docking, by low at the insulation salient point thereon
The connection of fusing point conductive metal.
14. low-power consumption high response speed circuit protection device according to claim 9, it is characterised in that the detection unit
It including two conductive connection rows, the joint face superposition of the two connection rows, and is connected by low melting point conductive metal, in superposition pair
Insulation limiting device is provided on the wherein joint face of a connection row connect.
15. according to any low-power consumption high response speed circuit protection device of claim 9 to 14, it is characterised in that in institute
It states detection unit and is provided with protection shell.
16. low-power consumption high response speed circuit protection device according to claim 15, it is characterised in that in the protection
Arc-extinguishing medium is filled in shell.
17. low-power consumption high response speed circuit protection device according to claim 1, it is characterised in that the action element
Gas generating unit is triggered for electricity, the gas generating unit includes two lead terminals and pyrotechnics coyote hole, two lead terminals
One end connects by heating wire or is provided in its end electrode close to each other；The other end respectively with described current limiting element one end
It is connected with one end of detection unit；Lead terminal heating wire end or electrode tip are arranged in pyrotechnic composition room.
18. low-power consumption high response speed circuit protection device according to claim 17, it is characterised in that in the gas
Piston, the space between the piston and the gas generating unit are provided in chamber between generating device and the electric conductor
For sealing space；Piston limit structure is provided in the chamber.
19. 7 to 18 any low-power consumption high response speed circuit protection device according to claim 1, it is characterised in that institute
Action element is stated to be fixed on insulation shell by cover board.
20. low-power consumption high response speed circuit protection device according to claim 6 or 7, it is characterised in that go out described
The end that connects of arc fuse is provided with temperature sensing device, and when temperature sensing device room temperature is state of insulation, when overloading high temperature, the sense
Warm device conducting；The temperature sensing device makes each temperature-sensitive by its distance or insulation temperature sensing material different melting points away from heat generating spot
Device is connected in a designated order.
21. low-power consumption high response speed circuit protection device according to claim 20, it is characterised in that the temperature-sensitive dress
It sets including two electric conductors, is provided with pressing device on an electric conductor wherein；Insulation temperature-sensitive is provided between the electric conductor
Material；It is insulation solid-state under the insulation temperature sensing material room temperature, temperature sensing material fusing of insulating when overloading high temperature, two conductions
Body can be connected under pressing device effect.
22. low-power consumption high response speed circuit protection device according to claim 1, it is characterised in that the electric conductor
Structural strength weak spot is at least to run through the conductive board width together what electric conductor above and below interval opened up
Groove.
23. low-power consumption high response speed circuit protection device according to claim 22, it is characterised in that the groove type
Shape is U type, V-type or trapezium structure.
24. low-power consumption high response speed circuit protection device according to claim 1, it is characterised in that the electric conductor
Structural strength weak spot is that the electric conductor is broken as to two parts, and the joint face of electric conductor described in two parts of disconnection is folded up and down
Add docking, lower superposition on it is connected at face to be fixed by solder joint, bonding or riveting.
25. low-power consumption high response speed circuit protection device according to claim 1, it is characterised in that the electric conductor
Structural strength weak spot is that the electric conductor is broken as to two parts, and there are gaps between two parts electric conductor of disconnection, described
The upper surface of gap is fixedly connected below by the row of conductive connection by solder joint, bonding, riveting.
26. low-power consumption high response speed circuit protection device according to claim 1, it is characterised in that the electric conductor
Structural strength weak spot is that the electric conductor is broken as to two parts, and there are gaps between two parts electric conductor of disconnection, described
Conductive connection row is crimped with above gap.
27. low-power consumption high response speed circuit protection device according to claim 1, it is characterised in that in the electric conductor
It is provided with arc-chute in the cavity of the lower section of structural strength weak spot and air-flow guides partition, the pressure limiting filter device is located at institute
It states on the side wall of the insulation shell of arc-chute side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810982439.7A CN109243939B (en) | 2018-08-27 | 2018-08-27 | Low-power consumption high response speed circuit protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810982439.7A CN109243939B (en) | 2018-08-27 | 2018-08-27 | Low-power consumption high response speed circuit protection device |
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| CN109243939A true CN109243939A (en) | 2019-01-18 |
| CN109243939B CN109243939B (en) | 2024-04-16 |
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| CN201810982439.7A Active CN109243939B (en) | 2018-08-27 | 2018-08-27 | Low-power consumption high response speed circuit protection device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114334573A (en) * | 2021-12-30 | 2022-04-12 | 广东中贝能源科技有限公司 | Intelligent fuse |
| WO2023204128A1 (en) * | 2022-04-22 | 2023-10-26 | パナソニックＩｐマネジメント株式会社 | Shutdown device and shutdown system |
| WO2024045422A1 (en) * | 2022-09-01 | 2024-03-07 | 西安中熔电气股份有限公司 | Multi-excitation-source protection apparatus |
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|---|---|
| CN109243939B (en) | 2024-04-16 |
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