CN206410604U - Electronic firecracker - Google Patents

Abstract

The utility model provides a kind of electronic firecracker, including：Power supply, boost and inversion unit and set off unit, boosting inversion unit includes PWM module, two FETs, determine frequency module and the voltage changing module that boosts, unit is seted off in boosting voltage changing module access, the first winding and the second winding of primary coil are connected with two FETs respectively, and first winding be the circle of 3.2 circles~7, second winding is the circle of 3.2 circles~7, and the output frequency of boosting inversion unit is 12kHz~30kHz.The electronic firecracker that the utility model is provided, by the number of turn for the primary coil for limiting boosting voltage changing module, boost inverter circuit obtains moderate output frequency, on the one hand, reduce the electrical performance demands for setting off the electrical part of each in unit, so as to reduce the price of single electrical part, and then reduce the holistic cost of product, on the other hand, reduce the loss of electrical part in operation, so as to extend the service life of electrical part, and then the service life of product is extended, add the competitiveness of product in market.

Description

Electronic firecracker

Technical field

The utility model is related to a kind of firecrackers, more particularly to a kind of electronic firecracker.

Background technology

Firecrackers are lucky symbols, and day cracker sound on every festival, celebrating is deafening, and colored spark is danced in the air over the sky, is given People is with joyous with inspiring；But firecrackers not only pollute the environment, will also result in various disabilities and fire incident, to the country and people with Unexpected economic loss is carried out；In order to solve the shortcoming of traditional firecrackers, electronic firecracker arises at the historic moment, and it can not only send common whip The simulated sound of big gun, and can be flashed with sound；Electronic firecracker is pollution-free, will not occur disability and fire incident, and can weight Use again, moreover it is possible to greatly reduce economic expenditure；Electronic firecracker is made using capacitor charging/discharging principle, is also referred to as used as thunder and lightning Formula firecrackers；Product connect after mains lighting supply can generation sound, light simultaneously, the sound is true to nature, and safety and environmental protection is the reason of traditional gunpowder firecrackers Think substitute；But there are the following problems for the electronic firecracker in correlation technique：

1st, firecrackers circuit is capacitive load, and the high-frequency alternating current frequency needed for output is higher, tight to electronic component requirement Lattice, the high expensive of product；

2nd, the working time of control electronic firecracker and time of having a rest mode are：Increase an active heat protection device, together When heating temp is no more than rated value, the active heating element in this active heat protection device can additionally increase load, and And the electrical control circuit of firecrackers ceaselessly phase, "on" position is constantly in, the loss of electrical part is added, causes electrical part easy Damage；

3rd, electronic firecracker generally uses lead-acid accumulators lead-acid battery, and the energy density of this kind of battery is than relatively low (68-80Wh/ L, 25-30Wh/kg), this results in battery volume greatly, weight weight, and this kind of battery feature of environmental protection is bad.

Utility model content

At least one in order to solve the above-mentioned technical problem, the utility model provides a kind of electronic firecracker, including：Power supply； Boosted inversion unit, and the boosting inversion unit is connected with the power supply；With set off unit, it is described to set off unit and the boosting Inversion unit is connected, and the boosting inversion unit sets off unit for described in and provides electric energy；Wherein, the boosting inversion unit includes PWM (Pulse Width Modulation) module, two FETs, determine frequency module and boosting voltage changing module, the boosting The primary coil of voltage changing module is connected with the PWM module and two FETs, and list is seted off described in secondary coil access Member, the primary coil includes the first winding and the second winding, first winding and second winding respectively with two institutes State FET connection, and first winding is the circle of 3.2 circles~7, second winding is the circle of 3.2 circles~7, so that the liter The output frequency for pressing inversion unit is 12kHz~30kHz.

The electronic firecracker that the utility model is provided, the number of turn of the primary coil by limiting the voltage changing module that boosts, boosts inverse Power transformation rood is to suitable output frequency, on the one hand, in the case where not reducing properties of product and quality, reduces and sets off unit In each electrical part electrical performance demands, so as to reduce the price of single electrical part, so reduce product it is overall into This, on the other hand, reduces the loss of electrical part in operation, so as to extend the service life of electrical part, and then extends The service life of product, adds the competitiveness of product in market.

Specifically, the boosting voltage changing module output frequency of electronic firecracker is more than 30MHz in correlation technique, to electrical part Electric requirement is higher, and the electronic firecracker that the utility model is provided, by the first winding coil circle for limiting the voltage changing module that boosts Number and the second winding coil number of turn are limited in the circle of 3.2 circles~7, using limit the output frequency of pressure inverter as 12kHz~ 30kHz, compared with the prior art 30MHz frequency, reduce the incoming frequency for setting off unit, on the one hand, do not reducing product In the case of energy and quality, the relatively low device of the usable electrical performance demands of the electrical part of each in unit is seted off, that is, is reduced The requirement of the electric property of the electrical part of each in unit is seted off, so as to reduce the price of single electrical part, and then production is reduced The holistic cost of product, on the other hand, reduces the loss of electrical part at work, so as to extend the use longevity of electrical part Life, and then the service life of product is extended, add the competitiveness of product in market.

In addition, the above-mentioned electronic firecracker that the utility model is provided can also have following additional technical feature：

In the above-mentioned technical solutions, first winding is the circle of 5 circles~6, and/or, second winding is the circle of 5 circles~6.

In the technical scheme, the number of turn of the first winding and or the second winding the number of turn in the circle of 5 circles~6, make transformer The frequency of output is in a more rational scope, and the frequency that such as transformer is exported is 15kHz~20kHz, be reduce further The loss of electrical part at work, so as to extend the service life of electrical part, and then extends the service life of product, increases The competitiveness of product in market is added.

In any of the above-described technical scheme, the number of turn of first winding is identical with the number of turn of second winding.

In the technical scheme, the number of turn of the first winding is identical with the number of turn of the second winding, makes the first winding of booster And second during alternate conduction between winding, output frequency is stable, it is to avoid frequency is unstable, causes electrical part at work The increased situation of loss occur, that is, the loss of electrical part at work is reduced, so as to extend the use of electrical part Life-span, and then the service life of product is extended, add the competitiveness of product in market.

In any of the above-described technical scheme, the electronic firecracker also includes：Timing control unit, the timing controlled list In the member access PWM module, for controlling after the PWM module setting time to disconnect with the power supply.

In the technical scheme, the setting of timing control unit makes electronic firecracker be stopped after operation setup time, And now PWM module is in open circuit, i.e. PWM module no power, it is to avoid even if liter during electronic firecracker stand-down in correlation technique Pressure inversion unit is also at inverter mode, i.e. inverter and is constantly in "on" position, causes to boost inversion unit at work The increased situation of loss occurs, so that the loss of electrical part at work is reduced, so as to extend boosting inversion unit Service life, and then extend the service life of product, add the competitiveness of product in market.

In any of the above-described technical scheme, the timing control unit includes：Switch module, the switch module access In the PWM module, for controlling the disconnection of the PWM module and the power supply or connecting；Timing control module, the timing Control module is connected with the switch module, disconnection or connection for controlling the switch module；With start control module, The startup control module is connected with the timing control module；Wherein, the startup control module controls the timing controlled Module starts timing, and the timing control module controls the switch module to disconnect after terminating so that the PWM module with it is described Power supply disconnects.

In the technical scheme, start control module control timing control module and start timing, timing control module terminates Controlling switch module disconnects afterwards, so that PWM module disconnects with power supply, and now PWM module is in open circuit, i.e., PWM module is obstructed Electricity, it is to avoid even if boosting inversion unit is also at inverter mode, i.e. inversion when electronic firecracker is in stand-down in correlation technique Device is constantly in "on" position, causes the increased situation generation of the loss of inversion unit at work of boosting, so as to reduce The loss of electrical part at work, so as to extend the service life of boosting inversion unit, and then extends the use of product In the life-span, add the competitiveness of product in market.

In any of the above-described technical scheme, the electronic firecracker also includes：Remote control, the remote control is used for described Start control module and send signal, to control being turned on and off for the startup control module.

In the technical scheme, remote control is used for control module transmission signal is started, to control described start to control mould Block is turned on and off, so that boosting inversion unit is started working, it is achieved thereby that to electronic firecracker remote control is done, to combustion The personal safety for putting personnel plays a good protection.

In any of the above-described technical scheme, the switch module is triode, relay or controllable silicon.

In the technical scheme, triode has long lifespan, safe and reliable, no machinery mill as switch module triode Damage, switch module speed is fast, small volume the advantages of；Relay has action fast, working stability, service life length, small volume etc. Advantage；Controllable silicon has the advantages that small volume, efficiency high, stability is good, reliable operation, and triode, relay or controllable silicon are made For switch module, the reliability of product is improved, so as to improve the quality of product, and then the market competition of product is added Power.

In any of the above-described technical scheme, the startup control module is single-chip microcomputer, and/or, the timing control molding Block is single-chip microcomputer.

In the technical scheme, circuit is controlled by single-chip microcomputer integrated chip, all parts are integrated on a chip, Small volume, simple in construction, reliability are high, and strong antijamming capability, improve the reliability of product, so as to improve product Quality, and then add the competitiveness of product in market.

In any of the above-described technical scheme, the power supply is lithium battery, when setting off cell operation, the lithium battery Output current is 5A~15A.

It is electronic firecracker working power from lithium battery, lithium battery is relative to other salt acids electricity in the technical scheme Pond has small volume, lightweight feature, and the lithium battery of general same performance parameter only has the size of lead accumulator half, weight It is 1/3rd of lead accumulator, service life is long, service life can reach more than 6 years, stores energy density with height, at present 460-600Wh/kg is reached, has been about 6-7 times of plumbic acid class battery, and environmental protection, no matter production, using and scrapping, all Do not contain, do not produce the poisonous and harmful heavy metallic such as any lead, mercury, cadmium element and material yet.

In any of the above-described technical scheme, the lithium battery includes the lithium cell of three to six series connection and/parallel connection.

In the technical scheme, the lithium battery that three to six lithium cells of battery are constituted can adjust lithium as the case may be The shape of battery, reduces the volume of electronic firecracker.

Brief description of the drawings

Of the present utility model above-mentioned and/or additional aspect and advantage will from description of the accompanying drawings below to embodiment is combined Become substantially and be readily appreciated that, wherein：

Fig. 1 is the structured flowchart of electronic firecracker described in the utility model；

Fig. 2 is the circuit diagram of one specific embodiment of electronic firecracker described in the utility model.

Wherein, the corresponding relation in Fig. 1 and Fig. 2 between reference and component names is：

10 power supplys, 20 boosting inversion units, 21 PWM modules, 22 FETs, 23 determine frequency module, and 24 boostings become pressing mold Block, 241 first windings, 242 second windings, 30 set off unit, 40 timing control units, 41 switch modules, 42 timing control moldings Block, 43 start control module.

T1 boosting voltage changing modules, T2 is high voltage package, and Q1 is switch module, and Q3, Q4 are FET, and MCU is timing controlled Module, IC1 is starts control module, and IC2 is PWM module, and C1, C2, C3, C4 are electric capacity, and D1, D2, D3, D4 are diode, R1, R2, R3, R4 are resistance, and F discharge heads, K1, K2 are controlling switch module.

Embodiment

In order to be more clearly understood that above-mentioned purpose of the present utility model, feature and advantage, below in conjunction with the accompanying drawings and tool The utility model is further described in detail body embodiment.It should be noted that in the case where not conflicting, this Shen The feature in embodiment and embodiment please can be mutually combined.

Many details are elaborated in the following description to fully understand the utility model, still, this practicality New to be different from other modes described here to implement using other, therefore, protection domain of the present utility model is simultaneously Do not limited by following public specific embodiment.

As depicted in figs. 1 and 2, the electronic firecracker that the utility model is provided includes：Power supply 10, boosting inversion unit 20 and combustion Put unit 30.

Specifically, boosting inversion unit 20 is connected with power supply 10；Set off unit 30 to be connected with boosting inversion unit 20, boost Inversion unit 20 provides electric energy to set off unit 30；Wherein, boosting inversion unit 20 includes PWM module 21, two FETs 22nd, frequency module 23 and boosting voltage changing module 24 are determined, the primary coil for the voltage changing module 24 that boosts and PWM module 21 and two field-effects Pipe 22 is connected, and unit 30 is seted off in secondary coil access, and primary coil includes the first winding 241 and the second winding 242, the first winding 241 and second winding 242 be connected respectively with two FETs 22, and the first winding 241 is the circle of 3.2 circles~7, the second winding 242 be the circle of 3.2 circles~7, so that the output frequency of boosting inversion unit 20 is 12kHz~30kHz.

The electronic firecracker that the utility model is provided, passes through the coil turn of the first winding 241 of the voltage changing module 24 that boosts and the The coil turn of two winding 242 is limited in the circle of 3.2 circles~7, to limit the output frequency of boosting inverter as 12kHz~30kHz, 30MHz frequency, reduces the incoming frequency for setting off unit 30 compared with the prior art, on the one hand, do not reduce properties of product and In the case of quality, the relatively low device of the usable electrical performance demands of each electrical part in unit 30 is seted off, that is, reduces combustion The requirement of the electric property of each electrical part in unit 30 is put, so as to reduce the price of single electrical part, and then production is reduced The holistic cost of product, on the other hand, reduces the loss of electrical part at work, so as to extend the use longevity of electrical part Life, and then the service life of product is extended, add the competitiveness of product in market.

In addition, boosting voltage changing module 24 output frequency can by PWM module (IC2) peripheral electric capacity C4 and resistance R4 structures Into frequency module 23 of determining determine.

In one embodiment of the present utility model, the first winding 241 is the circle of 5 circles~6, and/or, the second winding 242 is 5 The circle of circle~6.

In this embodiment, the number of turn of the first winding 241 and or the second winding 242 the number of turn in the circle of 5 circles~6, make change The frequency of depressor output is in a more rational scope, and the frequency that such as transformer is exported is 15kHz~20kHz, further drop The low loss of electrical part at work, so as to extend the service life of electrical part, and then extends the use longevity of product Life, adds the competitiveness of product in market.

In one embodiment of the present utility model, the number of turn of the first winding 241 is identical with the number of turn of the second winding 242.

In this embodiment, the number of turn of the first winding 241 is identical with the number of turn of the second winding 242, makes the first of booster Between the winding 242 of winding 241 and second during alternate conduction, output frequency is stable, it is to avoid frequency is unstable, causes electrical equipment The increased situation of the loss of part at work occurs, that is, the loss of electrical part at work is reduced, so as to extend electricity The service life of device, and then the service life of product is extended, add the competitiveness of product in market.

In one embodiment of the present utility model, as depicted in figs. 1 and 2, electronic firecracker also includes：Timing control unit 40。

Specifically, timing control unit 40 access PWM module 21 in, for control after the setting time of PWM module 21 with electricity Source 10 disconnects.

In this embodiment, the setting of timing control unit 40, makes electronic firecracker stop work after operation setup time Make, and now PWM module 21 is in open circuit, the i.e. no power of PWM module 21, it is to avoid even if electronic firecracker stops in correlation technique The inversion unit 20 that boosted during the phase is also at inverter mode, i.e. inverter and is constantly in "on" position, causes the inversion unit 20 that boosts The increased situation of loss at work occurs, so that the loss of electrical part at work is reduced, so as to extend liter The service life of inversion unit 20 is pressed, and then extends the service life of product, the competitiveness of product in market is added.

In one embodiment of the present utility model, as depicted in figs. 1 and 2, timing control unit 40 includes：Switch module 41st, timing control module 42 and startup control module 43.

Specifically, the access of switch module 41 PWM module, for controlling the disconnection of PWM module 21 and power supply 10 or connecting；It is fixed When control module 42 be connected with switch module 41, disconnection or connection for controlling switch module 41；Start control module 43 with Timing control module 42 is connected；Wherein, start the control timing control module 42 of control module 43 and start timing, timing control module Controlling switch module 41 disconnects after 42 end, so that PWM module 21 disconnects with power supply 10.

In this embodiment, start the control timing control module 42 of control module 43 and start timing, timing control module 42 Controlling switch module 41 disconnects after end, so that PWM module 21 disconnects with power supply 10, and now PWM module 21 is in open circuit, i.e., PWM module 21 no power, it is to avoid even if boosting inversion unit 20 is also at inversion during electronic firecracker stand-down in correlation technique State, i.e. inverter are constantly in "on" position, cause the increased situation hair of the loss of inversion unit 20 at work that boosts It is raw, so that the loss of electrical part at work is reduced, so as to extend the service life of boosting inversion unit 20, Jin Eryan The service life of product has been grown, the competitiveness of product in market is added.

In one embodiment of the present utility model, electronic firecracker also includes：Remote control.

Specifically, remote control is used for the transmission signal of control module 43 is started, to control the unlatching for starting control module 43 Or close.

In this embodiment, remote control is used for the transmission signal of control module 43 is started, to control to start control module 43 Be turned on and off so that boosting inversion unit 20 is started working, it is achieved thereby that do remote control to electronic firecracker, to combustion The personal safety for putting personnel plays a good protection.

In one embodiment of the present utility model, switch module 41 is triode, relay or controllable silicon.

In this embodiment, triode has long lifespan, safe and reliable, no machinery mill as the triode of switch module 41 Damage, the speed of switch module 41 is fast, small volume the advantages of；Relay, which has, acts fast, working stability, service life length, small volume The advantages of；Controllable silicon has the advantages that small volume, efficiency high, stability is good, reliable operation, triode, relay or controllable silicon As switch module 41, the reliability of product is improved, so that the quality of product is improved, and then it is competing to add the market of product Strive power.

In one embodiment of the present utility model, as shown in Fig. 2 it is single-chip microcomputer to start control module 43, and/or, it is fixed When control module 42 be single-chip microcomputer.

In this embodiment, circuit is controlled by single-chip microcomputer integrated chip, all parts is integrated on a chip, body Small, the simple in construction, reliability of product is high, and strong antijamming capability, the reliability of product is improved, so as to improve the product of product Matter, and then add the competitiveness of product in market.

Certainly, it should be appreciated by those skilled in the art can be integrated in by starting control module and timing control module by one On single-chip microcomputer, as long as can realize that timing controlled electronic firecracker starts just can be with.

In one embodiment of the present utility model, power supply 10 is lithium battery 10, when setting off cell operation, lithium battery 10 Output current be more than 5A, it is preferable that lithium battery output current be 5A~15A.

In this embodiment, it is electronic firecracker working battery 10 from lithium battery 10, lithium battery 10 is relative to other hydrochloric acid Class battery 10 has small volume, and lightweight feature, the lithium battery 10 of general performance parameter only has the big of the half of lead accumulator 10 Small, weight is 1/3rd of battery 10, and service life is long, and service life can reach more than 6 years, close with height storage energy Degree, has reached 460-600Wh/kg at present, is about 6-7 times of plumbic acid class battery 10, and environmental protection, no matter producing, using With scrap, all do not contain, do not produce the poisonous and harmful heavy metallic such as any lead, mercury, cadmium element and material yet.

In one embodiment of the present utility model, lithium battery 10 includes the lithium cell of three to six series connection and/or parallel connection, Preferably, the dynamic output voltage of lithium battery 10 is 8V~12V.

In this embodiment, the lithium battery that 10 three to six lithium cells of battery are constituted, lithium can be adjusted as the case may be The shape and packing forms of battery 10, reduce the volume of electronic firecracker, and lithium cell is 18650 type battery cores.

2 specific work process for specifically describing electronic firecracker below in conjunction with the accompanying drawings：

After electronic firecracker starts, start the meter of output (out) the connection timing control module (MCU) of control module (IC1) When triggering end (5 pin), timing control module (MCU) start timing, the level of the output pin (3 pin) of timing control module (MCU) Turn on switch module (Q1), the supply pin (12 pin) of PWM module (IC2) powered and worked, and the first output pin (9 pin) and Pulse, FET (Q3, Q4) alternate conduction, boosting voltage changing module (T1) output high frequency are recommended in second output pin (10 pin) output Alternating current, when by current limiter C1, commutation diode (D1 and D2), storage capacitor (C2), controllable silicon oscillating circuit (R1, R2, D4, C3), the part such as high voltage package (T2), discharge head (F) composition electronic firecracker sets off unit and obtains sending " crack in Pi after this alternating current " firecrackers sound；After work a period of time, timing control module (MCU) timing to point, its output pin (3 pin) is without output, electronic cutting Module switch module (Q1) shut-off is closed, PWM module (IC2) loses power supply and is stopped, and FET (Q3, Q4) is not turned on, Inverter stops output alternating current side firecrackers and is stopped.

In addition, as the necessary requirement of circuit normal work, it is necessary to set charger or charging circuit, overcurrent protection electricity Road, over-discharge protection circuit, short-circuit protection circuit etc., are not just being specifically illustrated.

In addition, the electronic firecracker that the utility model is provided considers in cost and performance (i.e. cost performance), remove Outside the armature winding of aforementioned definition boosting voltage changing module, during by limiting electronic firecracker " setting off " output current of lithium battery as 5~15A, can reach related elements (battery core, FET etc.) steady operation, specifically, lithium battery output current is determined：1) Set off the number (preferably 2) of unit in the reasonable scope, it is to avoid number sounds dull very little, and too many lithium battery needs The problem of increasing number, in addition, component selects more high-power, cost can be at a relatively high, and market is difficult to receive, therefore, lithium battery Output current be 5A~15A, can make to set off the number of unit in the reasonable scope, and cost is not high；2) make to set off unit In storage capacitor C2 size in 120UF-330UF, it is to avoid then sound too small C2 is small, and C2 excessive inversion units are born The problem of lotus is overweight.

In summary, the electronic firecracker that the utility model is provided, the circle of the primary coil by limiting the voltage changing module that boosts Number, boost inverter circuit obtains suitable output frequency, on the one hand, in the case where not reducing properties of product and quality, reduction The electrical performance demands of the electrical part of each in unit are seted off, so as to reduce the price of single electrical part, and then production are reduced The holistic cost of product, on the other hand, reduces the loss of electrical part in operation, so that the service life of electrical part is extended, And then the service life of product is extended, add the competitiveness of product in market.

Specifically, the boosting voltage changing module output frequency of electronic firecracker is more than 30MHz in correlation technique, to electrical part Electric requirement is higher, and the electronic firecracker that the utility model is provided, by the first winding coil number of turn of the voltage changing module that boosts and The second winding coil number of turn is limited in the circle of 3.2 circles~7, to limit the output frequency of pressure inverter as 12kHz~30kHz, phase To prior art 30MHz frequency, the incoming frequency for setting off unit is reduced, on the one hand, do not reducing properties of product and quality In the case of, the relatively low device of the requirement of the usable electric property of the electrical part of each in unit is seted off, that is, reduces and sets off list The requirement of the electric property of the electrical part of each in member, so as to reduce the price of single electrical part, and then reduces the whole of product Body cost, on the other hand, reduces the loss of electrical part at work, so that the service life of electrical part is extended, and then The service life of product is extended, the competitiveness of product in market is added.

The term such as term " installation ", " connected ", " connection ", " fixation " all should be interpreted broadly in the utility model, example Such as, " connection " can be fixedly connected or be detachably connected, or be integrally connected；" connected " can be joined directly together, It can also be indirectly connected to by intermediary.For the ordinary skill in the art, it can understand as the case may be Above-mentioned term concrete meaning in the utility model.

In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc. Mean that combining the embodiment or specific features, structure, material or the feature of example description is contained in of the present utility model at least one In individual embodiment or example.In this manual, identical embodiment is not necessarily referring to the schematic representation of above-mentioned term Or example.Moreover, specific features, structure, material or the feature of description can be in any one or more embodiments or examples In combine in an appropriate manner.

Preferred embodiment of the present utility model is the foregoing is only, the utility model is not limited to, for this For the technical staff in field, the utility model can have various modifications and variations.It is all it is of the present utility model spirit and principle Within, any modification, equivalent substitution and improvements made etc. should be included within protection domain of the present utility model.

Claims (10)

1. a kind of electronic firecracker, it is characterised in that including：

Power supply (10)；

Boost inversion unit (20), and the boosting inversion unit (20) is connected with the power supply (10)；With

Unit (30) is seted off, the unit (30) of setting off is connected with the boosting inversion unit (20), the boosting inversion unit (20) electric energy is provided for the unit (30) of setting off；

Wherein, the boosting inversion unit (20) include PWM module (21), two FETs (22), determine frequency module (23) and Boost voltage changing module (24), the primary coil of the boosting voltage changing module (24) and the PWM module (21) and two fields Effect pipe (22) is connected, and secondary coil access is described to set off unit (30), and the primary coil includes the first winding (241) and the Two windings (242), first winding (241) and second winding (242) connect with two FETs (22) respectively Connect, and first winding (241) is the circle of 3.2 circles~7, second winding (242) is the circle of 3.2 circles~7, so that the boosting The output frequency of inversion unit (20) is 12kHz~30kHz.

2. electronic firecracker according to claim 1, it is characterised in that

The number of turn of first winding (241) is the circle of 5 circles~6, and/or, the number of turn of second winding (242) is 5 circle~6 Circle.

3. electronic firecracker according to claim 2, it is characterised in that

The number of turn of first winding (241) is identical with the number of turn of second winding (242).

4. electronic firecracker according to any one of claim 1 to 3, it is characterised in that also include：Timing control unit (40), the timing control unit (40) is accessed in the PWM module (21), during for controlling the PWM module (21) to set Between after with the power supply (10) disconnect.

5. electronic firecracker according to claim 4, it is characterised in that the timing control unit (40) includes：

Switch module (41), the switch module (41) is accessed in the PWM module (21), for controlling the PWM module (21) with the disconnection of the power supply (10) or connecting；

Timing control module (42), the timing control module (42) is connected with the switch module (41), described for controlling The disconnection or connection of switch module (41)；With

Start control module (43), the startup control module (43) is connected with the timing control module (42)；

Wherein, the startup control module (43) controls the timing control module (42) to start timing, the timing control molding Block (42) controls the switch module (41) to disconnect after terminating, so that the PWM module (21) disconnects with the power supply (10).

6. electronic firecracker according to claim 5, it is characterised in that also include：

Remote control, the remote control is used to send signal to the startup control module (43), to control described start to control mould Block (43) are turned on and off.

7. electronic firecracker according to claim 5, it is characterised in that

The switch module (41) includes triode, relay or controllable silicon.

8. electronic firecracker according to claim 5, it is characterised in that

The startup control module (43) is single-chip microcomputer, and/or, the timing control module (42) is single-chip microcomputer.

9. electronic firecracker according to any one of claim 1 to 3, it is characterised in that

The power supply (10) is lithium battery (10), and when setting off unit (30) work, the output current of the lithium battery (10) is 5A to 15A.

10. electronic firecracker according to claim 9, it is characterised in that

The lithium battery (10) includes the lithium cell of three to six series connection and/or parallel connection.