CN208523771U - Hand-held smoke filter - Google Patents

Abstract

The utility model discloses a kind of hand-held smoke filters, including shell, main control board, turbine fan and filter screen, main control board, the different location of turbine fan and filter screen setting inside the housing, and the air duct of filter screen is shaped form；Main control board includes that substrate and the USB interface being arranged on substrate, main control chip, power management chip, charge-discharge circuit, electronic ignition device bonding wire contact, paster LED, output contact, switch bonding wire contact, electricity show that LED array/LCD MODULE, power supply bonding wire contact and location hole, switch bonding wire contact are welded with touch switch or push switch.The utility model, which can siphon away secondhand smoke, to be filtered out, prevents the harmful substances such as tar, nicotine from influencing the health of smoker and other people, can carry out intelligent control by wired mode.

Description

Hand-held smoke filter

Technical field

The utility model relates to smoke filter field, in particular to a kind of hand-held smoke filter.

Background technique

Cigarette is made by tobacco, and 1,200 multiple compounds, wherein most pair are about contained in tobacco Human body is toxic.Cigarette can about discharge chemical substance in 6,800 when lighting, be harmful to the human body there are about 3,008 More than hundred kinds.The harm of especially tar and nicotine is larger.The work for the sponge filter tip filtering poisonous substance that cigarette itself has With very limited, therefore, long-term smoking will seriously damage the health of smoker.However, for the cigarette for thering is long-term smoking to be accustomed to For the people, and it is difficult to give up smoking completely.Cigarette is inserted in cigarette sleeve by smoking apparatus in the prior art in smoking, During smoking will a large amount of noxious materials such as product tar, nicotine, due to a large amount of toxic not by tar, nicotine etc. Substance is filtered and handles, therefore can impact to the health of smoker.

Utility model content

The technical problem to be solved by the present invention is to, in view of the above drawbacks of the prior art, provide it is a kind of light, Secondhand smoke can be siphoned away and filter out, prevent the harmful substances such as tar, nicotine from influencing the health of smoker and other people, can lead to Cross the hand-held smoke filter that wired mode carries out intelligent control.

The technical scheme adopted by the utility model to solve the technical problem is as follows: a kind of hand-held smoke filter is constructed, including Shell, main control board, turbine fan and filter screen, the main control board, turbine fan and filter screen setting are outside Different location inside shell, the air duct of the filter screen are shaped form；The main control board includes substrate and is arranged at USB interface, main control chip, power management chip, charge-discharge circuit, electronic ignition device bonding wire contact, patch on the substrate Piece LED, output contact, switch bonding wire contact, electricity show LED array/LCD MODULE, power supply bonding wire contact and positioning Hole, the USB interface, power management chip, electronic ignition device bonding wire contact, paster LED, output contact, switch bonding wire touching Piece, electricity show that LED array/LCD MODULE and power supply bonding wire contact are connected with the main control chip, the electronics point Fiery device bonding wire contact connects electronic ignition device, and the switch bonding wire contact is welded with touch switch or push switch.

It further include electronic ignition device in hand-held smoke filter described in the utility model, the electronic ignition device It is connect with the electronic ignition device bonding wire contact.

In hand-held smoke filter described in the utility model, the electricity shows that LED array includes five groups of dual-colored LEDs Lamp, when electricity is 100%, the equal brilliant white light of dual-colored LED lamp described in five groups；When electricity is 90%, dual-colored LED lamp described in four groups Equal brilliant white light, the bright orange light of dual-colored LED lamp described in one group；When electricity is 80%, the equal brilliant white light of dual-colored LED lamp described in four groups；When When electricity is 70%, the equal brilliant white light of dual-colored LED lamp described in three groups, the bright orange light of dual-colored LED lamp described in one group.

In hand-held smoke filter described in the utility model, the LCD MODULE includes a liquid crystal display, LCD MODULE battery total capacity show percent numerical value according to shared by existing electricity and the hand-held smoke filter State.

The state of the hand-held smoke filter includes the state of turbine fan, the state of paster LED, electronic ignition device Switch state and charged state.

In hand-held smoke filter described in the utility model, the short-press once touch switch or push switch, The output voltage power supply of the output contact, then by the primary touch switch or push switch, power-off；It is light described in long-pressing When the time of touch switches or push switch exceeds the first setting time, the output electricity of the electronic ignition device bonding wire contact Pressure power supply, unclamps the touch switch or push switch, powers off；It connects in the second setting time and is touched twice by described Formula switch or push switch, the output voltage power supply of the paster LED, then by the primary touch switch or push type Switch, power-off；When output contact power supply, touch switch described in long-pressing or push switch are more than first setting When the time, the output voltage of the electronic ignition device bonding wire contact is powered, and the output contact does not power off.

In hand-held smoke filter described in the utility model, when charging in such a way that lighting is dynamic or the side of liquid crystal screen display Formula shows the final state of electricity；When electricity changes downwards, the LCD MODULE is shown with data, if described in use Electricity shows LED array, then often reaches and become lamp critical value bright light third setting time；When electricity is lower than 10%, any operation It does not export, one group of dual-colored LED lamp shows minimum electricity by way of flashing yellow light.

In hand-held smoke filter described in the utility model, first setting time be 2 seconds, described second setting when Between be 0.6 second, the third setting time be 5 seconds.

In hand-held smoke filter described in the utility model, the charge-discharge circuit includes DC power supply, battery, first Triode, the first metal-oxide-semiconductor, the first inductance and first diode, collector and the DC power supply of first triode Anode connection, the emitter of first triode are connect with one end of one end of the first capacitor and the first inductance respectively, The other end of the first capacitor is connect with the drain electrode of first metal-oxide-semiconductor, the source electrode of first metal-oxide-semiconductor respectively with it is described straight The cathode in galvanic electricity source is connected with the cathode of battery, and the other end of first inductance is connect with the anode of the first diode, The anode of the cathode of the first diode and the battery connect, and the capacitance of the first capacitor is 450pF, and described first The model L-1822 of diode.

The hand-held smoke filter for implementing the utility model has the advantages that due to being equipped with shell, governor circuit Plate, turbine fan and filter screen, the air duct of filter screen are shaped form, and smoker uses the hand-held smoke filter, passes through its whirlpool Wheeled fan siphons away the secondhand smoke of generation, is fallen using filter screen filtration, prevents harm caused by secondhand smoke, main control board packet USB interface, main control chip, power management chip, charge-discharge circuit, the electronic ignition dress for including substrate and being arranged on substrate It sets bonding wire contact, paster LED, output contact, switch bonding wire contact, electricity and shows LED array/LCD MODULE, power supply weldering Line contact and location hole, mobile terminal can carry out intelligent control to the hand-held smoke filter by USB interface, therefore can be by two Hand cigarette siphon away filter out, prevent the harmful substances such as tar, nicotine influence the health of smoker and other people, can pass through it is wired Mode carries out intelligent control.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is the structural schematic diagram in the utility model hand-held smoke filter one embodiment；

Fig. 2 is the structural schematic diagram that hand-held smoke filter removes outer casing upper cover in the embodiment；

Fig. 3 is the structural schematic diagram of outer casing bottom in the embodiment；

Fig. 4 is the structural schematic diagram of outer casing upper cover in the embodiment；

Fig. 5 is the structural schematic diagram of turbine fan in the embodiment；

Fig. 6 is the structural schematic diagram of filter screen in the embodiment；

Fig. 7 is the schematic wiring diagram of main control board in the embodiment；

Fig. 8 is the circuit diagram of charge-discharge circuit in the embodiment.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

In the utility model hand-held smoke filter embodiment, the structural schematic diagram of the hand-held smoke filter such as Fig. 1 institute Show.Fig. 2 is that hand-held smoke filter removes the structural schematic diagram of outer casing upper cover in the present embodiment, in the present embodiment, hand-held filter Cigarette device includes shell 1, main control board 2, turbine fan 3 and filter screen 4, wherein main control board 2,3 and of turbine fan The different location inside shell 1 is arranged in filter screen 4, and the rational position inside shell 1, turbine type is arranged in main control board 2 The rational position inside shell 1 is arranged in fan 3, and the rational position in shell 1 is arranged in filter screen 4, such as: main control board 2 can be set one end inside shell 1, and turbine fan 3 can be set the other end inside shell 1, and filter screen 4 can be with One end on shell 1 close to turbine fan 3 is set；Certainly, turbine fan 3, which can also be, is arranged in inside shell 1 One end inside shell 1 also can be set in middle position, and one end inside shell 1 can be set in main control board 2, can also Main control board 2 is dismantled into the both ends that two parts are separately positioned on inside shell 1.The present embodiment is to main control board 2, whirlpool Wheeled fan 3 and filter screen 4 are arranged in inside shell 1 where do not require.

In the present embodiment, the inside of filter screen 4 is equipped with the air duct formed by a plurality of curve, and the air duct of filter screen 4 is curve Type, such as: shaped form can be S type, V-type, undaform etc..Fig. 3 is the structural schematic diagram of outer casing bottom in the present embodiment；Fig. 4 For the structural schematic diagram of outer casing upper cover in the present embodiment；Fig. 5 is the structural schematic diagram of turbine fan in the present embodiment；Fig. 6 is The structural schematic diagram of filter screen in the present embodiment.

In the present embodiment, air circulation is enhanced by attached wall principle, turbine fan 3 can take out air, the curve of shell 1 Circular arc brings bigger air to flow by attached wall principle, and the air being sucked is discharged by filter screen 4, due to filter screen 4 Air duct be shaped form, air can be smoothly through air duct very much, and when by the filter screen 4 of shaped form, particle can bump against filtering On the wall of net 4, tar and nicotine particle will be absorbed by filter screen 4.Therefore the utility model can siphon away secondhand smoke The health for filtering, preventing the harmful substances such as tar, nicotine from influencing smoker and other people.

Fig. 7 is the schematic wiring diagram of main control board in the present embodiment, in Fig. 7, the main control board 2 include substrate J, USB interface A, main control chip B, power management chip C, charge-discharge circuit (being not shown in Fig. 7), electronic ignition device bonding wire contact D, paster LED E, output contact F, switch bonding wire contact G, electricity show LED array/LCD MODULE H, the touching of power supply bonding wire Piece I and location hole K, USB interface A, main control chip B, power management chip C, charge-discharge circuit, electronic ignition device bonding wire contact D, paster LED E, output contact F, switch bonding wire contact G, electricity show LED array/LCD MODULE H, the touching of power supply bonding wire Piece I and location hole K are arranged on substrate J, it is worth mentioning at this point that, in the present embodiment, main control chip B uses single-chip microcontroller, the list Piece machine uses the chip for meeting ARM framework, such as: Atmel ultra low power SAM L21 series, USB interface A are connect using TYPE-C Mouthful or other may be implemented the multiple power source and data-interface of the utility model function, for illuminating, substrate J is adopted paster LED E With black or other color substrates, contact F is exported using 4.7V 1A and exports contact, location hole K is ground connection location hole, location hole K Number be two.

It is USB interface A, power management chip C, electronic ignition device bonding wire contact D, paster LED E, defeated in the present embodiment Out contact F, switch bonding wire contact G, electricity show dual-colored LED array/LCD MODULE H and power supply bonding wire contact I with master Chip B connection, electronic ignition device bonding wire contact D connection electronic ignition device are controlled, electronic ignition device can be electronic ignition Heating wire contact, arc ignition device or laser-ignition unit etc., switch bonding wire contact G are welded with touch switch or push type Switch.Due to being equipped with USB interface A, in this way, terminal can carry out intelligent control to the hand-held smoke filter by USB interface A System, therefore the utility model can carry out intelligent control by wired mode.It is noted that in the present embodiment, terminal can be with It is laptop, mobile phone, tablet computer or remote controler etc..

In the present embodiment, adaptive charge/discharge may be implemented by USB interface A, specifically, when outside access such as hand When the electrical equipments such as machine, battery discharge output is automatically switched to, when the external access of detection is charged state, is automatically switched to pair Battery charging.

In the present embodiment, the output voltage of electronic ignition device bonding wire contact D is 3.7V~4.2V, and paster LED E's is defeated Voltage is 3.4V~3.8V out, and the output voltage of output contact F is 3.0V~4.7V.

In the present embodiment, which further includes electronic ignition device (not shown), electronic ignition device It is connect with electronic ignition device bonding wire contact D.

In the present embodiment, LED array/LCD MODULE H, electricity, which show that LED array H uses patch, to be shown for electricity Double-colored low bright LED, voltage needs are checked oneself after determining component, and LCD MODULE H includes a liquid crystal display, liquid Crystal display screen is checked oneself after determining component using monochromatic or color LED liquid crystal display, voltage needs, electronic ignition device One of effect of the output voltage of bonding wire contact D is to connect electronic ignition device, therefore it is noted that prevent overheat (it is contemplated that logical Power-off alternating).One of effect of the output voltage of paster LED E is the strong light LED of patch, therefore it is noted that heat dissipation (shell 1 cyclic annular air inlet is metal material, extends to main control board 2 and passes through the product of heat dissipating silicone grease and electronic ignition device, LED Thermal potential is set, and then, when sucking air by turbine fan 3, while being cooled down to above-mentioned accumulated heat position).

In the present embodiment, electricity shows that LED array H includes five groups of dual-colored LED lamps, and about the display of electricity, five groups double-colored LED light shows that every 10% 1 changes from 0~100% respectively by white/xanthochromia from left to right.When electricity is 100%, The equal brilliant white light of five groups of dual-colored LED lamps；When electricity is 90%, the equal brilliant white light of four groups of dual-colored LED lamps, one group of dual-colored LED lamp is bright orange Light；When electricity is 80%, the equal brilliant white light of four groups of dual-colored LED lamps；When electricity is 70%, the equal brilliant white light of three groups of dual-colored LED lamps, One group of bright orange light of dual-colored LED lamp, remaining and so on.LCD MODULE H battery total capacity according to shared by existing electricity is shown The state of percentages and hand-held smoke filter.The state of above-mentioned hand-held smoke filter include turbine fan state, The state of paster LED, the switch state of electronic ignition device and charged state.

In the present embodiment, about the control logic of switch, specifically, primary (such as: in the 0.6 second) soft-touch type of short-press Switch or push switch, the output voltage power supply of output contact F, then a touch switch or push switch are pressed, power-off； When the time of long-pressing touch switch or push switch exceeds the first setting time, electronic ignition device bonding wire contact D's is defeated Power voltage supply out unclamps touch switch or push switch, power-off；It connects in the second setting time and is opened twice by soft-touch type It closes or push switch, the output voltage of paster LED E is powered, then by a touch switch or push switch, power-off；When When exporting contact F power supply, when long-pressing touch switch or push switch are more than the first setting time, electronic ignition device bonding wire The output voltage of contact D is powered, and output contact F is not powered off.

In the present embodiment, above-mentioned first setting time is 2 seconds, and the second setting time is 0.6 second.Certainly, in practical application In, the size of the first setting time and the second setting time can adjust accordingly as the case may be.

In the present embodiment, about charge and discharge logic control, specifically, when charging in such a way that lighting is dynamic or liquid crystal display Aobvious mode shows the final state of electricity, and blinking intervals are 0.5 second, and when charging complete, electricity shows LED array/liquid crystal Show in module H, for example LCD MODULE H, then show charge completion information, for example electricity shows LED array, then five groups it is double-colored LED light all light, when electricity changes downwards, LCD MODULE H is shown with data, if showing LED array using electricity, Often reach and becomes lamp critical value bright light third setting time；When electricity is lower than 10%, any operation is not exported, wherein one group double Color LED light shows minimum electricity by way of flashing yellow light.It is noted that third setting time is 5 in the present embodiment Second.Certainly, in practical applications, the size of third setting time can adjust accordingly as the case may be.

It is noted that the length of main control board 2 is 40mm~55mm in the present embodiment, width is 10~15mm, With a thickness of 5mm~8mm (thickness).The measurements of the chest, waist and hips size of the main control board 2 is to be able to achieve the minimum value of repertoire (containing heat dissipation Consider) it is best, the pursuit limit.The wiring of the main control board 2 uses Limit Width, to guarantee that electric current is smooth.

Fig. 8 is the circuit diagram of charge-discharge circuit in the present embodiment, and in Fig. 8, which includes DC power supply Vin, battery BAT, the first triode Q1, the first metal-oxide-semiconductor M1, the first inductance L1 and first diode D1, wherein the first triode The anode of the collector of Q1 and DC power supply Vin are connect, the emitter of the first triode Q1 one end with first capacitor C1 respectively It is connected with one end of the first inductance L1, the other end of first capacitor C1 is connect with the drain electrode of the first metal-oxide-semiconductor M1, the first metal-oxide-semiconductor M1 Source electrode connect respectively with the cathode of the cathode of DC power supply Vin and battery BAT, the other end of the first inductance L1 and the one or two pole The anode of pipe D1 connects, and the cathode of first diode D1 is connect with the anode of battery BAT.

In the present embodiment, first capacitor C1 be coupled capacitor, for prevent the first triode Q1 and the first metal-oxide-semiconductor M1 it Between interference, first diode D1 be Current Limiting Diodes, for where the first inductance L1 branch carry out current-limiting protection, therefore The safety and reliability of circuit is higher.It is noted that the capacitance of first capacitor C1 is 450pF in the present embodiment, the The model L-1822 of one diode D1, certainly, in practical applications, the capacitance of first capacitor C1 can be as the case may be It adjusts accordingly, first diode D1 can choose the diode that other models have similar functions.

In the present embodiment, wherein circuit used in charge-discharge circuit is made of two kinds of working conditions, when the charging stage, One triode Q1 and the first metal-oxide-semiconductor M1 work works in linear condition, reaches in switch state, discharge regime, the first metal-oxide-semiconductor M1 It is acted on to constant-current discharge；It can be detected, fed back and be calculated by the charging current to battery BAT, can accurately be controlled The discharge current of battery BAT.

The charging circuit of battery BAT and discharge circuit are integrated in a circuit by the charge-discharge circuit, current detecting ring Section shares one, can greatly simplify the structure of main control board 2, and the first metal-oxide-semiconductor M1 is worked in charging in switch state, It can reduce circuit loss, in the turn-on time of the first triode Q1 and the first metal-oxide-semiconductor M1, interval time and turn-on frequency Be it is variable, can be adjusted accordingly according to real work situation.

The charging and discharging function of battery BAT can be realized in the charge and discharge electricity using different working conditions in the different stages Energy.The first triode Q1 and the first metal-oxide-semiconductor M1 work is charged to battery BAT, matched simultaneously in switch state in the charging stage The switching time of first triode Q1 and the first metal-oxide-semiconductor M1 guarantee that the system work of charging stage in optimum state, is realized efficient Charging；In discharge regime, the first triode Q1 or the first metal-oxide-semiconductor M1 is allowed to work in the linear condition (electric conduction of the first metal-oxide-semiconductor M1 Resistance linearly reduces as driving voltage increases), realize the electric discharge of energy consumption formula.

In the present embodiment, when the first triode Q1 conducting, the first metal-oxide-semiconductor M1 cut-off, DC power supply Vin passes through first Inductance L1 charges to battery BAT, and the electric current of the first inductance L1 is linearly increasing；First triode Q1 cut-off, the first metal-oxide-semiconductor M1 is also not When conducting, the first inductance L1 is linearly reduced by first diode D1 afterflow, the electric current of the first inductance L1；First triode Q1 is cut Only, when the first metal-oxide-semiconductor M1 is connected, the first inductance L1 is by the first metal-oxide-semiconductor M1 afterflow, due to the conducting resistance of the first metal-oxide-semiconductor M1 It is worth smaller, it is possible to reach the low-loss effect of drop.

In electric discharge, the first triode Q1 is at this time without driving signal, so the first triode Q1 is in off state, it can To be equivalent to disconnect, the first inductance L1 is not work in switch state, can be equivalent to conducting wire yet, is applied to the first metal-oxide-semiconductor M1 Lower than fully on driving voltage, the conducting resistance of the first metal-oxide-semiconductor M1 reduces as driving voltage increases, and conducting resistance changes Become the discharge current that can control battery BAT, by reaching constant-current discharge purpose with this principle.

In the present embodiment, for charge and discharge protecting, specifically, which has following charge and discharge protecting function Can: protect battery to stop output when low-voltage；Prevent overvoltage input protection main control board 2；Prevent transient voltage fluctuation impact Circuit element；It prevents from stopping charging when overcharge electricity is full；Electricity stops each road output lower than 10%, can only show electricity shape State；Electricity can carry out fast charge when being higher than 10% lower than 80%；When electricity is higher than 80%, Juan Chong is until electricity is full of；It prevents each Road exports electric current Hui Yong；Prevent excess load from exporting.

In the present embodiment, charge and discharge can carry out simultaneously, and when charging preferentially uses DC power supply Vin, and extra electricity is filled with electricity Pond BAT is obtained from battery BAT when not enough power supply.When output demand excess load, electricity shows LED array/LCD MODULE H All display yellow lights illustrate overloadings, and stop exporting, still in charged state after charging complete, while when exporting, extra electricity It is not filled with battery BAT.

In short, suck cigarette by the hand-held smoke filter in the present embodiment, using turbine fan 3 by the second-hand of generation Cigarette siphons away, and is filtered out using filter screen 4, prevents harm caused by secondhand smoke, since the substrate J of main control board 2 is equipped with USB Interface A, mobile terminal can carry out intelligent control to the hand-held smoke filter by USB interface A, therefore can siphon away secondhand smoke It filters out, prevent the harmful substances such as tar, nicotine from influencing the health of smoker, intelligent control can be carried out by wired mode System.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model Protection scope within.

Claims (6)

1. a kind of hand-held smoke filter, which is characterized in that described including shell, main control board, turbine fan and filter screen Main control board, the different location of turbine fan and filter screen setting inside the housing, the air duct of the filter screen is curve Type；The main control board includes substrate and is respectively provided with USB interface, main control chip, power management core on the substrate Piece, charge-discharge circuit, electronic ignition device bonding wire contact, paster LED, output contact, switch bonding wire contact, electricity show LED Array/LCD MODULE, power supply bonding wire contact and location hole, the USB interface, power management chip, electronic ignition device Bonding wire contact, paster LED, output contact, switch bonding wire contact, electricity show LED array/LCD MODULE and power supply bonding wire Contact is connected with the main control chip, and the switch bonding wire contact is welded with touch switch or push switch.

2. hand-held smoke filter according to claim 1, which is characterized in that it further include electronic ignition device, the electronics Igniter is connect with the electronic ignition device bonding wire contact.

3. hand-held smoke filter according to claim 1, which is characterized in that the electricity shows that LED array includes five groups Dual-colored LED lamp, when electricity is 100%, the equal brilliant white light of dual-colored LED lamp described in five groups；It is double described in four groups when electricity is 90% The equal brilliant white light of color LED light, the bright orange light of dual-colored LED lamp described in one group；When electricity is 80%, dual-colored LED lamp described in four groups is bright White light；When electricity is 70%, the equal brilliant white light of dual-colored LED lamp described in three groups, the bright orange light of dual-colored LED lamp described in one group.

4. hand-held smoke filter according to claim 1, which is characterized in that the LCD MODULE includes a liquid crystal Display screen, LCD MODULE battery total capacity show percent numerical value and the hand-held according to shared by existing electricity The state of smoke filter.

5. hand-held smoke filter according to claim 4, which is characterized in that the state of the hand-held smoke filter includes whirlpool State, the state of paster LED, the switch state of electronic ignition device and the charged state of wheeled fan.

6. according to claim 1 to hand-held smoke filter described in 5 any one, which is characterized in that the charge-discharge circuit packet Include DC power supply, battery, the first triode, the first metal-oxide-semiconductor, the first inductance and first diode, the collection of first triode The anode of electrode and the DC power supply is connect, the emitter of first triode respectively with one end of first capacitor and first One end of inductance connects, and the other end of the first capacitor is connect with the drain electrode of first metal-oxide-semiconductor, first metal-oxide-semiconductor Source electrode is connect with the cathode of the cathode of the DC power supply and battery respectively, the other end of first inductance and the described 1st The anode of pole pipe connects, and the cathode of the first diode is connect with the anode of the battery, the capacitance of the first capacitor For 450pF, the model L-1822 of the first diode.