CN209088900U - A kind of heat radiating type lightning protection filter - Google Patents
A kind of heat radiating type lightning protection filter Download PDFInfo
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- CN209088900U CN209088900U CN201821929718.9U CN201821929718U CN209088900U CN 209088900 U CN209088900 U CN 209088900U CN 201821929718 U CN201821929718 U CN 201821929718U CN 209088900 U CN209088900 U CN 209088900U
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Abstract
It includes heat radiating type casing of filter and filter circuit plate that the utility model, which provides a kind of heat radiating type lightning protection filter,；The filter circuit plate is arranged in casing of filter；The casing of filter outer wall is equipped with the chamber for liquid circulation；The filter circuit plate is equipped with filter circuit；The filter circuit includes the first inductance L1, the second inductance L2, post-filtering circuit and protection indicating circuit；The positive input terminal of filter circuit, negative input end, filter circuit reference ground be connected separately with overshoot voltage protective module between any two, the overshoot voltage protective module includes varistor and the thermal fuse that is independently arranged.The utility model proposes a kind of heat radiating type lightning protection filter by casing of filter surface setting for coolant liquid circulation chamber improve heat dissipation effect; and by protection indicating circuit and thermal fuse effect, achieve the purpose that monitor and protect varistor.
Description
Technical field
The utility model relates to wave filter technology fields, and in particular to a kind of heat radiating type lightning protection filter.
Background technique
Conventional filter is to be sealed as casing of filter to filter circuit made of inductance, capacitor and resistance combination
It deposits,
In order to protect the circuit element in filter circuit from the injury of the pulse voltage generated in detection circuit, usually exist
Each voltage swell section connection varistor carries out circuit protection.It is more than maximum continuous use voltage when flowing through varistor voltage
When, cracking, and then abnormal heating occur for varistor, or even have the risk for generating fire.After pressure responsive resistor failure, Wu Fabao
The protection to each reactance component in filter circuit rear end is demonstrate,proved, is easy to cause secondary injury to filter circuit under over-voltage condition.
The structure of existing casing of filter is relatively simple.And in order to guarantee the leakproofness of casing of filter, usually recessed
Sealant is poured at slot and convex block, although doing so connect filter upper cover closely with shell, when filter needs are torn open
When unloading maintenance, can there are problems that being difficult disassembly, and the sealing structure of script can be destroyed, can not install again.In pressure-sensitive electricity
After hindering abnormal heating, the temperature in casing of filter is increased, and shell closed structure is unfavorable for radiating, can be to reactance on filter circuit
The physical characteristic of element generates interference, reduces the filter effect of each element.Also, the prolonged pulse electric shock under thunder and lightning environment
Under electromagnetic interference is generated to filter, there are biggish residual voltages to filter out in filter circuit.Therefore, one kind is needed at present
It can be convenient for filtering unit installing and dismounting, guarantee the heat dissipation performance of shell, monitor varistor working condition, extend varistor
Service life, guarantee the lightning protection filter effect of filter and protect the lightning protection filter of each filter reactance element.
Utility model content
Problem to be solved in the utility model is to provide a kind of heat dissipation for the above-mentioned deficiency in the presence of the prior art
Type lightning protection filter is used for the chamber of liquid circulation by being arranged on casing of filter outer wall, meets casing of filter
Sealing effect and heat dissipation performance are improved by the working condition for protecting indicating circuit that filtering unit is enable to monitor varistor
Lightning protection filter effect reaches protection each element purpose of filtering unit；And on the upper cover plate and lower cover plate for passing through casing of filter
Both ends are closed by two installation side plates after lower combination installation, realize being detachably connected for shell.
A part to achieve the above object, the utility model use the following technical solution:
A kind of heat radiating type lightning protection filter, including heat radiating type casing of filter and filter circuit plate；The filter circuit plate
It is arranged in casing of filter；The casing of filter outer wall is equipped with the chamber for liquid circulation；In the filter circuit plate
Equipped with filter circuit；The filter circuit includes the first inductance L1, the second inductance L2, and post-filtering circuit and protection instruction are electric
Road；The positive input terminal of filter circuit is connected through the first inductance L1 with the positive input terminal of post-filtering circuit；Bearing for filter circuit is defeated
Enter end to be connected through the second inductance L2 with the negative input end of post-filtering circuit；The positive input terminal of filter circuit, negative input end, filtering
The reference ground of circuit is connected separately with overshoot voltage protective module between any two, and the overshoot voltage protective module includes pressure-sensitive
Resistance and the thermal fuse being independently arranged, wherein thermal fuse and the thermally conductive connection of varistor；Each overshoot voltage protects mould
The thermal fuse of block is connected in series, and whole one end is connected with post-filtering module positive input terminal, and the other end is indicated through protection
Circuit is connected with the negative input end of post-filtering module.
It further, include several strip grooves along the setting of casing of filter outer wall in the chamber；The filtered electrical
Road plate is mounted on the casing of filter inner wall opposite with strip groove.
Further, the casing of filter includes upper cover plate, lower cover plate and two installation side plates；The upper cover plate is under
Cover board is combined into hollow cavity up and down；Described two installation side plates cover conjunction respectively and are fixed on two hollow end of hollow cavity.
Further, the upper cover plate and lower cover plate are respectively along its length through equipped with bar shaped mounting hole and matching bar shaped
The strip protrusion of mounting hole.
Further, the bar shaped mounting hole is equipped with length and installs less than bar shaped with respect to upper cover plate/lower cover plate installation side
The opening of hole internal diameter.
Further, it is major arc that the upper cover plate and lower cover plate, which are respectively equipped with cross section with respect to two installation side plates installation side,
Bar shaped fixation hole；Installation through-hole corresponding with bar shaped fixation hole is respectively equipped in described two installation side plates.
Further, the protection indicating circuit includes sequentially connected light emitting diode D1, zener diode D2 and limit
Leakage resistance R4；The anode of the light emitting diode D1 is connected with the output end of overshoot voltage protective module；The light emitting diode
The cathode of D1 is connected with the anode of zener diode D2；The cathode of the zener diode D1 and current-limiting resistance R4 input terminal phase
Even；The current-limiting resistance R4 output end is connected with the negative input end of post-filtering circuit.
Further, the overshoot voltage protective module also includes concatenation thermal fuse；The concatenation thermal fuse
It is connected in series with varistor.
Further, the post-filtering circuit positive input terminal, negative input end and reference ground are also distinguished simultaneously between any two
It is connected to bi-directional voltage stabilizing diode.
Further, the post-filtering circuit includes common mode inductance L3, the first filter capacitor C1, the second filter capacitor
C2, the first decoupling capacitance C3 and the second decoupling capacitance C4；The output end of the filter circuit is connect with common mode inductance L3；Described
One filter capacitor C1 is connected across common mode inductance L3 input terminal；The second filter capacitor C2 is connected across common mode inductance L3 output end；
Whole in parallel with the output end of post-filtering circuit after the first decoupling capacitance C3 and the second decoupling capacitance C4 connection, first moves back
The junction of coupling capacitor C3 and the second decoupling capacitance C4 are connected with reference ground.
The working principle and beneficial effect of the utility model are as follows: be arranged one on casing of filter outer wall and followed for liquid
The chamber of ring carries out cooling and heat dissipation to casing of filter in cold water injecting chamber；By in filter circuit plate mounting shell body, prevent
Only cause each circuit element physical characteristic impacted since temperature is excessively high；It is inhaled using the spike of the first inductance L1, the second inductance L2
It receives characteristic and filters out too high voltages, and DC voltage is filtered out by post-filtering circuit；Input terminal of the varistor to filter circuit
With the further pressure stabilizing of reference ground；By thermal fuse and the thermally conductive connection of varistor being independently arranged, when varistor loses
Fever passes to thermal fuse when effect, and thermal fuse is made to fuse, and disconnecting varistor prevents from burning out；Flowing through varistor
When voltage is more than maximum continuous use voltage, the thermal fuse series connection of any overshoot voltage protective module, as any guarantor
When protecting pressure responsive resistor failure, thermal fuse is timely, disconnecting circuit, it is ensured that the normal work of other varistors is reduced to filter
The influence of wave circuit；The working condition of varistor is monitored by protection indicating circuit.
Filter circuit plate is located on the casing of filter inner wall opposite with strip groove, cold water is flowed into chamber indoor circulation
In strip groove, to surface of shell uniform decrease in temperature, the cooling effect to filter circuit is improved.
Upper cover plate and lower cover plate are combined into hollow cavity, it is hollow that two installation side plate lid conjunctions are mounted on hollow cavity two
End reaches the installation of side wall detachable-type sealed.Wherein, pass through the opposite bar shaped mounting hole and strip being equipped between upper and lower cover plates
Male cooperation installation, solve the problems, such as due to sealant seal generate be not easy to dismounting, dismounting after leakproofness it is poor；It will filter
Wave circuit plate is arranged in the cavity, plays the role of protecting each device in filter circuit plate.
It is equipped with the opening that length is less than bar shaped mounting hole internal diameter with respect to lower cover plate side by bar shaped mounting hole, so that upper cover
Plate/lower cover plate can only be from upper cover plate/lower cover plate side insertion bar shaped mounting hole installation, and such connection type is more stable and guarantees
The airtightness of casing of filter side.
By corresponding through-hole on bar shaped fixation hole on upper cover plate and the left and right end face of lower cover plate and two installation side plates,
Installation side plate is installed to upper cover plate and lower cover plate by screw rod, since the cross section of bar shaped fixation hole is major arc, bar shaped is fixed
The open side in hole has certain tension to the taking-up and installation of screw rod, installs the disassembly of casing of filter more convenient, laborsaving.
Protection indicating circuit is connected with the output end of overshoot voltage protective module, is convenient for real-time judge by light emitting diode
Effective working condition of varistor, and by the excessively thermogenetic voltge surge of diode absorption varistor, and pass through current limliting
Resistance inhibits voltage peak, and the filter effect to post-filtering circuit is avoided to have an impact.
It is connected in series by concatenation thermal fuse with varistor, flowing through voltage in varistor is more than continuous use electricity
When pressure, the fuse of series connection with it fuses in time, has reached the protective effect to other elements, and indicates corresponding failure pressure
The effect of quick resistance.
Bi-directional voltage stabilizing diode pair back-end circuit plays the protective action of pressure stabilizing after pressure responsive resistor failure.
Two-stage common-mode inductor and multiple capacitors are housed using post-filtering circuit, can supplement and inhibit prime filtering unit
The electromagnetic interference not filtered out promotes the filter effect of post-filtering circuit.
The further advantage, target and feature of the utility model will be partially reflected by the following instructions, and part will also pass through
Research and practice to the utility model and be understood by the person skilled in the art.
Detailed description of the invention
Fig. 1 is casing of filter schematic diagram described in embodiment；
Fig. 2 is filter circuit schematic diagram described in embodiment；
Fig. 3 is the internal circuit schematic diagram of embodiment overshoot voltage protective module；
Fig. 4 is lightning protection circuit schematic diagram described in embodiment.
The utility model is marked comprising the following drawings: casing of filter 1, filter circuit plate 2, upper cover plate 3, lower cover plate 4, item
Shape slot 5, bar shaped mounting hole 6, strip protrusion 7, chamber 8, inlet 9, liquid outlet 10, bar shaped fixation hole 11, opening 12.
Specific embodiment
In order to make technological means of the utility model, creation characteristic, reach purpose and effect is more clear and is easy to
Understand, the utility model be further elaborated with reference to the accompanying drawings and detailed description:
The present embodiment is heat radiating type lightning protection filter, including heat radiating type casing of filter 1 and filter circuit plate 2；The filter
Wave circuit plate 2 is arranged in casing of filter 1；As shown in Figure 1,1 outer wall of casing of filter is equipped with for liquid circulation
Chamber 8；8 both ends of chamber are equipped with inlet 9 and liquid outlet 10；The filter circuit plate 2 is equipped with filter circuit；Such as Fig. 2
Shown, the filter circuit includes the first inductance L1, the second inductance L2, post-filtering circuit and protection indicating circuit；Filtered electrical
The positive input terminal on road is connected through the first inductance L1 with the positive input terminal of post-filtering circuit；The negative input end of filter circuit is through second
Inductance L2 is connected with the negative input end of post-filtering circuit；The reference of the positive input terminal, negative input end, filter circuit of filter circuit
Ground terminal is connected separately with overshoot voltage protective module between any two, and the overshoot voltage protective module includes varistor and independence
The thermal fuse of setting, wherein thermal fuse and the thermally conductive connection of varistor；The hot melt of each overshoot voltage protective module is protected
Dangerous silk is connected in series, and whole one end is connected with post-filtering module positive input terminal, and the other end is through protection indicating circuit and postposition
The negative input end of filter module is connected.
Wherein, three overshoot voltage protective modules have separately included the first varistor R1, the second varistor R2
With third varistor R3；As shown in figure 3, the internal circuit schematic diagram of overshoot voltage protective module, between pin 4 and pin 5
Independent be equipped with leads hot linked thermal fuse with each varistor, and pin 1 is connect with pin 2 by pin 3, and pin 2 and
It is in series with concatenation thermal fuse between pin 3, current-limiting resistance R5 is connected between pin 1 and pin 3.The first pressure-sensitive electricity
Pin 1, the pin 2 of resistance R1 is connected to the first inductance L1 input terminal and the second inductance L2 input terminal；The first pressure-sensitive electricity
Resistance R1 is equipped with a pin 4 and connect with the first inductance L1 voltage output end；The first varistor R1 is equipped with a pin 5 and the
The pin 4 of two varistor R2 is connected；Pin 1, the pin 2 of the second varistor R2 is connected to the first inductance L1
Input terminal and the first ground terminal；The second varistor R2 is equipped with a pin 5 and third varistor R3 and is equipped with a pin 4
It is connected；The pin 1 of the third varistor R3, pin 2 inputs respectively with the second differential mode inductance L2 and the first ground terminal phase
Even；The third varistor R3 is equipped with a pin 5 and passes through the input of the input terminal and post-filtering circuit of protection indicating circuit
End is connected.
By the first varistor R1, the pin 4 of the second varistor R2 and third varistor R3, pin 5 as heat
Fuse monitoring client is connected to the right end of the first inductance L1, under normal circumstances, the input terminal input voltage of filter circuit, electric current
The first inductance L1 and the second inductance L2 are flowed through, when the input terminal of filter circuit removes power supply, since there are electric current reductions for circuit
Trend, the first inductance L1 and the second inductance L2 will generate Kickback voltage, so that certain voltge surge can be generated to back segment, protect
Indicating circuit is connected to the induction side of the first inductance L1, can share one part of current, alleviates to two pole of the first bi-directional voltage stabilizing
The rush of current of pipe D3.
Including several along the strip groove 5 of 1 outer wall of casing of filter setting in the chamber 8；The filter circuit plate 2 is pacified
On casing of filter 1 inner wall opposite with strip groove 5.Liquid enters in strip groove 5 after the inflow of inlet 9, accelerates filter
The cooling efficiency of wave device shell 1.
The casing of filter 1 includes upper cover plate 3, lower cover plate 4 and two installation side plates；The upper cover plate 3 and lower cover plate
About 4 are combined into hollow cavity；Described two installation side plates cover conjunction respectively and are fixed on two hollow end of hollow cavity.
The upper cover plate 3 and lower cover plate 4 are respectively along its length through equipped with bar shaped mounting hole 6 and matching bar shaped mounting hole
6 strip protrusion 7.
6 opposite 3/ lower cover plate 4 of the upper cover plate installation side of bar shaped mounting hole is equipped with length and is less than 6 internal diameter of bar shaped mounting hole
Opening 12.Upper cover plate 3, lower cover plate 4 can only be installed or removed from side, strengthen connecting up and down for upper cover plate 3 and lower cover plate 4
It connects, is further ensured that the leakproofness of casing of filter 1.
The upper cover plate 3 and lower cover plate 4 install side with respect to two installation side plates and are respectively equipped with the bar shaped that cross section is major arc
Fixation hole 11；Installation through-hole corresponding with bar shaped fixation hole 11 is respectively equipped in described two installation side plates.It is penetrated by screw rod
Bar shaped fixation hole 11 and through-hole fix two installation side plates, since the cross section of bar shaped fixation hole 11 is major arc, screw rod and bar shaped
The connection of fixation hole 11 has certain tension, prevent cause due to expanding with heat and contract with cold etc. screw rod and 11 tension of bar shaped fixation hole or
Pine connection is crossed, inconvenient the problem of dismounting is caused.
The protection indicating circuit includes sequentially connected light emitting diode D1, zener diode D2 and current-limiting resistance R4；
The anode of the light emitting diode D1 is connected with the output end of overshoot voltage protective module；The cathode of the light emitting diode D1 with
The anode of zener diode D2 is connected；The cathode of the zener diode D2 is connected with current-limiting resistance R4 input terminal；The current limliting
Resistance R4 output end is connected with the negative input end of post-filtering circuit.
The overshoot voltage protective module also includes concatenation thermal fuse；The concatenation thermal fuse and varistor
It is connected in series.It is connected in series by concatenation thermal fuse with varistor, fuse is enabled to disconnect respective pressure sensitive electricity rapidly
Resistance prevented thermogenetic residual voltage from circulating.
The post-filtering circuit positive input terminal, negative input end and reference ground also respectively and are connected to two-way steady between any two
Press diode.After pressure responsive resistor failure, bi-directional voltage stabilizing diode establishes second erosion control pressure stabilizing barrier.
The post-filtering circuit includes common mode inductance L3, the first filter capacitor C1, the second filter capacitor C2, the first decoupling
Capacitor C3 and the second decoupling capacitance C4；The output end of the filter circuit is connect with common mode inductance L3；First filter capacitor
C1 is connected across common mode inductance L3 input terminal；The second filter capacitor C2 is connected across common mode inductance L3 output end；Described first moves back
It is whole in parallel with the output end of post-filtering circuit after coupling capacitor C3 and the second decoupling capacitance C4 connection, the first decoupling capacitance C3 with
The junction of second decoupling capacitance C4 is connected with reference ground.
The filter circuit plate 2 is equipped with lightning protection circuit；As shown in figure 4, the lightning protection circuit includes three-end air discharging
Pipe Q1, TVS array Q2, second resistance R5,3rd resistor R6, the 4th bi-directional voltage stabilizing diode D6, the second diode D7 and second
Common mode inductance L4；The input terminal and output end of the lightning protection circuit include anode and cathode；The input terminal of the lightning protection circuit
Anode and cathode are connect with second resistance R5 and 3rd resistor R6 respectively；The both ends three-end air discharging pipe Q1 are connected to
The input terminal of second resistance R5 and the input terminal of 3rd resistor R6；The output end of the second resistance R5 and 3rd resistor R6 point
It is not connected from the different pins of TVS array Q2；The TVS array Q2 is equipped with two pins and distinguishes the 4th bi-directional voltage stabilizing two of differential concatenation
Pole pipe D6 and the second diode D7 is simultaneously connect with third ground terminal；The TVS array Q2 is connect with the second common mode inductance L4；
The output end of the second common mode inductance L4 is connected with the output end of filter circuit.
When in use, it is packed into bar shaped mounting hole 6 by strip protrusion 7 upper cover plate 3 is fixedly mounted on lower cover plate 4,
It is tightly connected between upper cover plate 3 and lower cover plate 4；Filter circuit plate 2 is fixed on upper cover plate 3 or lower cover plate 4 and 5 phase of strip groove
Then two installation side plates are fixed on 4 both ends of upper cover plate 3 and lower cover plate by screw rod by the inner wall of back, further sealing filtering
Device shell 1 prevents lower cover plate 4 from skidding off upper cover plate 3 along bar shaped mounting hole 6.In disassembly, first two installation side plates are removed, then
Filter circuit plate 2 is taken out, if you need to dismantle upper cover plate 3 and lower cover plate 4, it is only necessary to install upper cover plate 3 and lower cover plate 4 along bar shaped
6 direction of hole removes, and does not influence sealing effect after multiple disassembly.By the end positive input terminal P of protection type filter circuit, negative input end
N-terminal, protection type filter circuit reference ground be connected separately with overshoot voltage protective module, either effects of lightning between any two
Or under the influence of external circuit, so that the end positive input terminal P of protection type filter circuit, negative input end N-terminal are relative to reference ground
Voltage increase suddenly or when the end positive input terminal P, the voltage of negative input end N-terminal between the two increase suddenly, overshoot voltage protection
The resistance value of the varistor of module sharply becomes smaller, and forms access, while varistor and concatenation thermal fuse will be due to electric currents
Effect generates heat, and after exceeding normal calorific capacity, Zapping circuit is avoided varistor in overheat shape by concatenation thermal fuse
It is burnt out under state；Concatenating thermal fuse will restore to be connected after temperature is in normal range (NR), again total with the varistor concatenated
Filter circuit is provided protection against with combination, and extends the service life of varistor；In addition, protection indicating circuit can be right
The state of overshoot voltage protective module and the working condition of protection type filter circuit carry out effective monitoring；Due to protecting indicating circuit
It is connect by leading hot linked thermal fuse with varistor in different overshoot voltage protective modules, once wherein hot melt insurance
After silk beyond temperature limiting due to disconnecting, protection indicating circuit will form open circuit, and light emitting diode D1 can not be lighted；With
This, by the varistor monitored in three overshoot voltage protective modules simultaneously with the presence or absence of overheat harm；And since protection indicates
There are the one-way conductions elements such as light emitting diode D1, zener diode D2 in circuit, when the input of protection type filter circuit anode lacks
When electricity or reversal connection, light emitting diode D1 will be unable to light, thus, it can be achieved that instruction of the protection indicating circuit to circuit working state
Function.
By the way that lightning protection circuit and filter circuit are mounted on filter circuit plate, lightning protection and filter function integration are realized；?
There are resistance and ceramic gas discharge tube cooperation to absorb prolonged surge and due to voltage spikes in suppression circuit in lightning protection circuit；And
TVS pipe, the bi-directional voltage stabilizing diode and diode cathode of TVS pipe both ends connection ground connection, TVS are connected in the output end of two resistance
The remaining voltage absorption that pipe cooperates bi-directional voltage stabilizing diode and diode further to generate lightning stroke pulse, it is ensured that late-class circuit member
Part from transient state high-energy impact and damage；A common mode inductance is connected in TVS pipe output end, inhibits prime filtering unit not
The electromagnetic interference filtered out.Lightening pulse filters the voltage that substantially lightening pulse generates after passing through lightning protection circuit, recycles filtering
Capacitor in circuit, inductance peak absorbing characteristic residual voltage is handled again, improve the lightning protection properties of whole system.
Finally, it is stated that above embodiments are merely intended for describing the technical solutions of the present application, but not for limiting the present application, it can be right
The technical solution of the utility model is modified or replaced equivalently, without departing from the objective and model of technical solutions of the utility model
It encloses, should all cover in the scope of the claims of the utility model.
Claims (10)
1. a kind of heat radiating type lightning protection filter, which is characterized in that including heat radiating type casing of filter and filter circuit plate；The filter
Wave circuit plate is arranged in casing of filter；The casing of filter outer wall is equipped with the chamber for liquid circulation；The filtering
Circuit board is equipped with filter circuit；The filter circuit includes the first inductance L1, the second inductance L2, post-filtering circuit and protection
Indicating circuit；The positive input terminal of filter circuit is connected through the first inductance L1 with the positive input terminal of post-filtering circuit；Filter circuit
Negative input end be connected through the second inductance L2 with the negative input end of post-filtering circuit；The positive input terminal of filter circuit, negative input
It holds, the reference ground of filter circuit is connected separately with overshoot voltage protective module, the overshoot voltage protective module between any two
Include varistor and the thermal fuse being independently arranged, wherein thermal fuse and the thermally conductive connection of varistor；Each overshoot electricity
The thermal fuse of pressure protective module is connected in series, and whole one end is connected with post-filtering module positive input terminal, other end warp
Protection indicating circuit is connected with the negative input end of post-filtering module.
2. a kind of heat radiating type lightning protection filter according to claim 1, which is characterized in that include several in the chamber
Along the strip groove of casing of filter outer wall setting；The filter circuit plate is mounted on the casing of filter inner wall opposite with strip groove
On.
3. a kind of heat radiating type lightning protection filter according to claim 1, which is characterized in that the casing of filter includes upper
Cover board, lower cover plate and two installation side plates；The upper cover plate and lower cover plate are combined into hollow cavity up and down；Described two installation sides
Plate covers conjunction respectively and is fixed on two hollow end of hollow cavity.
4. a kind of heat radiating type lightning protection filter according to claim 3, which is characterized in that the upper cover plate and lower cover plate point
Not along its length through the strip protrusion for being equipped with bar shaped mounting hole and matching bar shaped mounting hole.
5. a kind of heat radiating type lightning protection filter according to claim 4, which is characterized in that the bar shaped mounting hole relatively on
Cover board/lower cover plate installation side is equipped with the opening that length is less than bar shaped mounting hole internal diameter.
6. a kind of heat radiating type lightning protection filter according to claim 3, which is characterized in that the upper cover plate and lower cover plate phase
The bar shaped fixation hole that cross section is major arc is respectively equipped with to two installation side plates installation side；It is set respectively in described two installation side plates
There is installation through-hole corresponding with bar shaped fixation hole.
7. a kind of heat radiating type lightning protection filter according to claim 1, which is characterized in that the protection indicating circuit includes
Sequentially connected light emitting diode D1, zener diode D2 and current-limiting resistance R4；The anode and overshoot of the light emitting diode D1
The output end of voltage protection module is connected；The cathode of the light emitting diode D1 is connected with the anode of zener diode D2；It is described
The cathode of zener diode D2 is connected with current-limiting resistance R4 input terminal；The current-limiting resistance R4 output end and post-filtering circuit
Negative input end is connected.
8. a kind of heat radiating type lightning protection filter according to claim 1, which is characterized in that the overshoot voltage protective module
Also comprising concatenation thermal fuse；The concatenation thermal fuse is connected in series with varistor.
9. a kind of heat radiating type lightning protection filter according to claim 1, which is characterized in that the post-filtering circuit is just defeated
Enter end, negative input end and reference ground and also respectively and is connected to bi-directional voltage stabilizing diode between any two.
10. a kind of heat radiating type lightning protection filter according to claim 1, which is characterized in that the post-filtering circuit packet
L3 containing common mode inductance, the first filter capacitor C1, the second filter capacitor C2, the first decoupling capacitance C3 and the second decoupling capacitance C4；Institute
The output end for stating filter circuit is connect with common mode inductance L3；The first filter capacitor C1 is connected across common mode inductance L3 input terminal；
The second filter capacitor C2 is connected across common mode inductance L3 output end；The first decoupling capacitance C3 and the second decoupling capacitance C4 connects
Connect rear whole, the junction and ginseng of first decoupling capacitance C3 and second decoupling capacitance C4 in parallel with the output end of post-filtering circuit
Ground terminal is examined to be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201821929718.9U CN209088900U (en) | 2018-11-22 | 2018-11-22 | A kind of heat radiating type lightning protection filter |
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| CN201821929718.9U CN209088900U (en) | 2018-11-22 | 2018-11-22 | A kind of heat radiating type lightning protection filter |
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| CN209088900U true CN209088900U (en) | 2019-07-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109560782A (en) * | 2018-11-22 | 2019-04-02 | 重庆大及电子科技有限公司 | A kind of lightning protection filtering unit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109560782A (en) * | 2018-11-22 | 2019-04-02 | 重庆大及电子科技有限公司 | A kind of lightning protection filtering unit |
| CN109560782B (en) * | 2018-11-22 | 2024-02-23 | 重庆大及电子科技有限公司 | Lightning protection filtering component |
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Granted publication date: 20190709 |