CN204651680U

CN204651680U - Air negative ion generator

Info

Publication number: CN204651680U
Application number: CN201520364654.2U
Authority: CN
Inventors: 刘宁庄
Original assignee: Xian University of Science and Technology
Current assignee: Xian University of Science and Technology
Priority date: 2015-05-29
Filing date: 2015-05-29
Publication date: 2015-09-16
Anticipated expiration: 2025-05-29

Abstract

The utility model discloses a kind of air negative ion generator, comprise power conversion circuit, master controller and voltage conversion circuit, and protective circuit and negative high voltage feedback circuit; Power conversion circuit is made up of LC half-bridge resonance circuit, piezoelectric ceramic transformer and two voltage-multiplying circuits connected successively; Protective circuit comprises current foldback circuit and overheating protection circuit; Negative high voltage feedback circuit is made up of the bleeder circuit connected successively, half-wave rectifying circuit and voltage limiter circuit; The input of master controller is also connected to A/D change-over circuit, and the input of A/D change-over circuit is also connected to voltage given circuit; The output of master controller is connected to drive circuit, and LC half-bridge resonance circuit is connected with the output of drive circuit.The utility model is rationally novel in design, and functional reliability is high, complete function, failure rate is low, maintainable strong, practical, is convenient to promote the use of.

Description

Air negative ion generator

Technical field

The utility model belongs to air purifier technical field, is specifically related to a kind of air negative ion generator.

Background technology

Along with the reinforcement of the day by day serious of environmental pollution and people's environmental consciousness, air quality oneself become the focus of whole world concern.Especially recently, the PM value that national each big city is announced, all more than 2.0, has even exceeded 2.5, and this life that directly will threaten us is with healthy.

As the indoor environment that people live, be similarly subject to the impact of atmosphere quality, moreover, be more subject to the direct impact of indoor specific environment, but its pollution factor is more and more not obvious, situation also allows of no optimist.Room air pollution mainly causes room air harmful substance to exceed standard due to a variety of causes, thus affects human health status, and along with the aggravation of pollution level, people knows from experience generation sub-health state.Furniture problem, architectural problems, decorations problem etc. have all become three large subject matters of indoor environmental pollution.

Along with the kind of air harmful substance and the continuous increase of quantity, continuous research and production both at home and abroad to air purifier product, increasing indoor air cleaner product moves towards market, can be divided into according to cleaning principle: mechanical filter formula and adsorption cleaning device, electrostatic purifier, negative ion air-cleaner.Its technical characterstic is as follows:

Mechanical filter formula and absorption type air purifier, pressurizeed by blower ventilating, air is successively through filtering material, mainly purify particulate contaminants, clean-up effect determines according to the filtering material of design and character, certain limitation is very large, can not thorough filtering noxious chemical substance and bactericidal action.

Electrostatic air cleaner is that one makes pollutants in air charged by electrostatic, has then adsorbed the dirt in air of charged particle with dust collect plant trapping, has reached the object that purifies air.But this clarifier not only cost and operating cost is higher also can cause secondary pollution.

The anion that air negative ion generator utilizes self to produce realizes the purification to air.The main component of air is nitrogen and oxygen, usual nitrogen, oxygen molecule electrical property in neutral, be with positive and negative electric charge equal.Negative aeroion refers to molecule electronegative in air or atom.But when after the electronics and oxygen molecule combination of air molecule ionization generation, the negative oxygen ion that chemical property is active can be formed.Negative oxygen ion not with other material generation fast reactions before, human body is acted on by breathing, nerve and hematological system, improve PFT, enhance metabolism, strengthen resistance against diseases, improving water flood, kill virus and bacterium, obtain fresh air, smoke abatement and dust control, improve indoor Air Quality.And its side effect is less, bactericidal effect is obvious, obtains and admits widely.And anion generator common in the market builds formation by analogue device, although this kind of anion generator has simple, the cheap advantage of circuit, also there is higher, the warm drift of failure rate simultaneously and seriously, usually cause the problems such as ion generator inefficacy because temperature rise is too high.

Utility model content

Technical problem to be solved in the utility model is, for above-mentioned deficiency of the prior art, to provide a kind of air negative ion generator, and it is rationally novel in design, functional reliability is high, complete function, failure rate is low, maintainable strong, practical, be convenient to promote the use of.

For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of air negative ion generator, it is characterized in that: the 24V DC voltage conversion comprised for 24V DC power supply is exported be the negative direct current high voltage of-6.5kV ~-11kV power conversion circuit, be used for master controller that power conversion circuit is controlled and be used for the voltage conversion circuit of powering for power circuit each in air negative ion generator, and protective circuit and for negative direct current high voltage signal feedback that described power conversion circuit is exported to the negative high voltage feedback circuit of master controller, described power conversion circuit is made up of LC half-bridge resonance circuit, piezoelectric ceramic transformer and two voltage-multiplying circuits connected successively, and described LC half-bridge resonance circuit is connected with the output of 24V DC power supply, described protective circuit comprises and to be connected with the current signal sampling end of LC half-bridge resonance circuit and for the current foldback circuit protected piezoelectric ceramic transformer overcurrent with for the overheated overheating protection circuit protected of piezoelectric ceramic transformer, described negative high voltage feedback circuit is made up of the bleeder circuit connected successively, half-wave rectifying circuit and voltage limiter circuit, and the input of described bleeder circuit is connected with the output of two voltage-multiplying circuits, the output of described current foldback circuit connects with the input of master controller, the input of described master controller is also connected to A/D change-over circuit, the output of described overheating protection circuit is all connected with the input of A/D change-over circuit with the output of voltage limiter circuit, and the input of described A/D change-over circuit is also connected to the voltage given circuit of the negative direct current high voltage size exported for given described power conversion circuit, the output of described master controller is connected to drive circuit, and described LC half-bridge resonance circuit is connected with the output of drive circuit, the described voltage conversion circuit 24V direct voltage comprised for 24V DC power supply being exported is converted to the 5V voltage conversion circuit of 5V, 5V direct voltage for being exported by 5V voltage conversion circuit is converted to the 3.3V voltage conversion circuit of 3.3V and is used for the 3.3V direct voltage that 3.3V voltage conversion circuit exports to be converted to the 1.5V voltage conversion circuit of 1.5V, described master controller all connects with the output of 3.3V voltage conversion circuit and 1.5V voltage conversion circuit, described current foldback circuit, overheating protection circuit, A/D change-over circuit, voltage given circuit and drive circuit all connect with the output of 5V voltage conversion circuit.

Above-mentioned air negative ion generator, it is characterized in that: described LC half-bridge resonance circuit comprises NMOS power tube Q3, inductance L 1, nonpolar electric capacity C3, nonpolar electric capacity C4 and nonpolar electric capacity C5, the grid of described NMOS power tube Q3 is connected with the output of drive circuit by resistance R12, one end of described inductance L 1 connects with the output of 24V DC power supply, the described source electrode of NMOS power tube Q3 and the other end of inductance L 1, one end of nonpolar electric capacity C3 and one end of nonpolar electric capacity C5 connect and are the output of LC half-bridge resonance circuit, the drain electrode of described NMOS power tube Q3 is by resistance R13 ground connection, the described drain electrode of NMOS power tube Q3 and the link of resistance R13 are the current signal sampling end of LC half-bridge resonance circuit, the other end of described nonpolar electric capacity C3 is by nonpolar electric capacity C4 ground connection, the other end ground connection of described nonpolar electric capacity C5, described piezoelectric ceramic transformer is multilayer piezoelectric ceramic transformer MPT1, one end of the primary piezo oscillator of described multilayer piezoelectric ceramic transformer MPT1 connects with the output of LC half-bridge resonance circuit, the other end ground connection of the primary piezo oscillator of described multilayer piezoelectric ceramic transformer MPT1, one end of the secondary piezoelectric oscillator of described multilayer piezoelectric ceramic transformer MPT1 is the output of piezoelectric ceramic transformer, described two voltage-multiplying circuits are made up of diode D1, diode D2 and nonpolar electric capacity C6, the anode of described diode D1 and the negative electrode of diode D2 all connect with the output of piezoelectric ceramic transformer, the minus earth of described diode D1, the anode of described diode D2 be two voltage-multiplying circuits output and by nonpolar electric capacity C6 ground connection.

Above-mentioned air negative ion generator, is characterized in that: described master controller is fpga chip EP2C5T144C8N.

Above-mentioned air negative ion generator, it is characterized in that: described A/D change-over circuit comprises modulus conversion chip AD7862, Verf pin and the VDD pin of described modulus conversion chip AD7862 all connect with the output of 5V voltage conversion circuit, the DB0 pin of described modulus conversion chip AD7862, DB1 pin, DB2 pin, DB3 pin, DB4 pin, DB5 pin, DB6 pin, DB7 pin, DB8 pin, DB9 pin, DB10 pin and DB11 pin are corresponding in turn to the 94th pin with fpga chip EP2C5T144C8N, 93rd pin, 92nd pin, 87th pin, 86th pin, 81st pin, 80th pin, 79th pin, 76th pin, 75th pin, 74th pin and the 73rd pin connect, described modulus conversion chip AD7862's pin, BUSY pin, RD pin, CS pin and A0 pin are corresponding in turn to and connect with the 4th pin of fpga chip EP2C5T144C8N, the 3rd pin, the 7th pin, the 8th pin and the 24th pin, the VB1 pin of described modulus conversion chip AD7862 connects with the output of voltage limiter circuit and by nonpolar electric capacity C1 ground connection, the VA1 pin of described modulus conversion chip AD7862 connects with the output of overheating protection circuit, and the VB2 pin of described modulus conversion chip AD7862 connects with the output of voltage given circuit, described voltage given circuit is made up of slide rheostat VR1 and nonpolar electric capacity C2, the output of the one termination 5V voltage conversion circuit of described slide rheostat VR1, the other end ground connection of described slide rheostat VR1, the sliding end of described slide rheostat VR1 is the output of voltage given circuit, and by nonpolar electric capacity C2 ground connection.

Above-mentioned air negative ion generator, is characterized in that: described drive circuit is made up of symmetrical triode Q1, triode Q2, resistance R1 and resistance R2, and described symmetrical triode Q1 is made up of triode Q1-2 under triode Q1-1 in NPN type and positive-negative-positive, the base stage of described triode Q2 is the input of drive circuit and connects with the 9th pin of fpga chip EP2C5T144C8N, the collector electrode of described triode Q2, in NPN type, under the base stage of triode Q1-1 and positive-negative-positive, the base stage of triode Q1-2 is all connected with the output of 5V voltage conversion circuit by resistance R2, in described NPN type, the collector electrode of triode Q1-1 is connected with the output of 5V voltage conversion circuit by resistance R1, the equal ground connection of collector electrode of triode Q1-2 under the emitter of described triode Q2 and positive-negative-positive, in described NPN type, under the emitter of triode Q1-1 and positive-negative-positive, the emitter of triode Q1-2 connects and is the output of drive circuit.

Above-mentioned air negative ion generator, is characterized in that: described bleeder circuit is made up of the resistance R16 connected and resistance R17, and the one end after described resistance R16 and resistance R17 connects is the input of bleeder circuit, other end ground connection; Described half-wave rectifying circuit is made up of diode D5, diode D6 and nonpolar electric capacity C13, the anode of described diode D5 and the negative electrode of diode D6 all connect with the link of resistance R16 and resistance R17, the anode of described diode D6 and the equal ground connection of the other end of nonpolar electric capacity C13; Described voltage limiter circuit is made up of voltage stabilizing didoe DZ3, and the negative electrode of described voltage stabilizing didoe DZ3 connects with the negative electrode of diode D5 and is the output of voltage limiter circuit, the plus earth of described voltage stabilizing didoe DZ3.

Above-mentioned air negative ion generator, it is characterized in that: described current foldback circuit comprises comparator U8B, triode Q1, the reference voltage circuit connected with the in-phase input end of comparator U8B and the Signal Collection and amplify circuit connected with the inverting input of comparator U8B, described reference voltage circuit is by resistance R19, resistance R20, voltage stabilizing didoe DZ4 and nonpolar electric capacity C14 forms, one end after described resistance R19 and resistance R20 connects connects with the output of 5V voltage conversion circuit, other end ground connection, the link of described resistance R19 and resistance R20 is the reference voltage output terminal of reference voltage circuit, the negative electrode of described voltage stabilizing didoe DZ4 and one end of nonpolar electric capacity C14 all connect with the output of 5V voltage conversion circuit, the anode of described voltage stabilizing didoe DZ4 and the equal ground connection of the other end of nonpolar electric capacity C14, described Signal Collection and amplify circuit is made up of operational amplifier U8A, resistance R21, resistance R22 and nonpolar electric capacity C15, the in-phase input end of described operational amplifier U8A is current signal input and connects with the current signal sampling end of LC half-bridge resonance circuit, the inverting input of described operational amplifier U8A is by resistance R22 ground connection, between the inverting input that described resistance R21 and nonpolar electric capacity C15 is connected in parallel on operational amplifier U8A and output, the output of described operational amplifier U8A is the output of Signal Collection and amplify circuit, the base stage of described triode Q1 connects with the output of comparator U8B, the grounded collector of described triode Q1, the transmitting of described triode Q1 very current foldback circuit output and connected with the output of 5V voltage conversion circuit by resistance R18, described overheating protection circuit is made up of temperature sensor MCP9701.

Above-mentioned air negative ion generator, it is characterized in that: described 5V voltage conversion circuit comprises step-down switching regulator MCP16301, switching diode D3, switching diode D4, voltage stabilizing didoe DZ1, voltage stabilizing didoe DZ2 and inductance L 2,4th pin of described step-down switching regulator MCP16301 and the 5th pin are all connected with the negative electrode of switching diode D3 by insurance F1, and by polar capacitor C7 ground connection; The anode of described switching diode D3 and the negative electrode of voltage stabilizing didoe DZ1 all connect with the output of 24V DC power supply, the plus earth of described voltage stabilizing didoe DZ1,1st pin of described step-down switching regulator MCP16301 connects with the negative electrode of switching diode D4, and connected with the negative electrode of voltage stabilizing didoe DZ2 and one end of inductance L 2 by nonpolar electric capacity C12, the plus earth of described voltage stabilizing didoe DZ2, the anode of described switching diode D4 and the other end of inductance L 2 connect and are the output of 5V voltage conversion circuit, and by polar capacitor C8 ground connection; The output of described 5V voltage conversion circuit be connected to the resistance R14 and resistance R15 that connect between ground, the 3rd pin of described step-down switching regulator MCP16301 connects with the link of resistance R14 and resistance R15; Described 3.3V voltage conversion circuit comprises chip AMS1117-3.3V, 3rd pin of described chip AMS1117-3.3V connects with the output of 5V voltage conversion circuit, and by polar capacitor C9 ground connection, the 1st pin ground connection of described chip AMS1117-3.3V, 2nd pin of described chip AMS1117-3.3V is the output of 3.3V voltage conversion circuit, and by polar capacitor C10 ground connection; Described 1.5V voltage conversion circuit comprises chip AMS1117-1.5V, 3rd pin of described chip AMS1117-1.5V connects with the output of 3.3V voltage conversion circuit, the 1st pin ground connection of described chip AMS1117-1.5V, 2nd pin of described chip AMS1117-1.5V is the output of 1.5V voltage conversion circuit, and by polar capacitor C11 ground connection.

The utility model compared with prior art has the following advantages:

1, the circuit structure of the utility model air negative ion generator is simple, rationally novel in design, and it is convenient to realize.

2, air negative ion generator of the present utility model, utilize piezoelectric ceramic transformer as main power inverter, it has the advantages such as drive circuit is simple, volume is little, electromagnetic-radiation-free, the circuit structure overcoming current wire-wound transformers anion generator is more complicated, require that stages is more, high-frequency oscillating circuits also can produce interference to communication, domestic circuit, be afraid of short circuit, dangerous, unstable, also can cause the shortcomings such as burning.

3, the utility model adopts FPGA (field programmable gate array) chip as essential core control unit, has the simple advantage of peripheral circuit.

4, functional reliability of the present utility model is high, complete function, has overheated, overcurrent protection function, ensure that reliability and the durability of ion generator.

5, maintainability of the present utility model is strong, can be applied to hotel, at home, office, the place such as hospital, beautify the environment, purify air, practical, be convenient to promote the use of.

In sum, the utility model is rationally novel in design, and functional reliability is high, complete function, failure rate is low, maintainable strong, practical, is convenient to promote the use of.

Below by drawings and Examples, the technical solution of the utility model is described in further detail.

Accompanying drawing explanation

Fig. 1 is schematic block circuit diagram of the present utility model.

Fig. 2 is the circuit theory diagrams of the utility model power conversion circuit.

Fig. 3 is the circuit connection diagram of the utility model master controller, A/D change-over circuit, voltage given circuit and drive circuit.

Fig. 4 is the circuit theory diagrams of the utility model negative high voltage feedback circuit.

Fig. 5 is the circuit theory diagrams of the utility model current foldback circuit.

Fig. 6 is the circuit theory diagrams of the utility model voltage conversion circuit.

Description of reference numerals:

1-master controller; 2-LC half-bridge resonance circuit; 3-piezoelectric ceramic transformer;

4-two voltage-multiplying circuits; 5-current foldback circuit; 6-overheating protection circuit;

7-bleeder circuit; 8-half-wave rectifying circuit; 9-voltage limiter circuit;

10-A/D change-over circuit; 11-voltage given circuit; 12-drive circuit;

13-5V voltage conversion circuit; 14-5V voltage conversion circuit;

15-1.5V voltage conversion circuit; 16-24V DC power supply.

Embodiment

As shown in Figure 1, air negative ion generator of the present utility model, the 24V DC voltage conversion comprised for 24V DC power supply 16 is exported be the negative direct current high voltage of-6.5kV ~-11kV power conversion circuit, be used for master controller 1 that power conversion circuit is controlled and be used for the voltage conversion circuit of powering for power circuit each in air negative ion generator, and protective circuit and for negative direct current high voltage signal feedback that described power conversion circuit is exported to the negative high voltage feedback circuit of master controller 1, described power conversion circuit is made up of the LC half-bridge resonance circuit 2 connected successively, piezoelectric ceramic transformer 3 and two voltage-multiplying circuits 4, and described LC half-bridge resonance circuit 2 is connected with the output DV24V of 24V DC power supply 16, described protective circuit comprises and to be connected with the current signal sampling end of LC half-bridge resonance circuit 2 and for the current foldback circuit 5 protected piezoelectric ceramic transformer 3 overcurrent with for the overheated overheating protection circuit 6 protected of piezoelectric ceramic transformer 3, described negative high voltage feedback circuit is made up of the bleeder circuit 7 connected successively, half-wave rectifying circuit 8 and voltage limiter circuit 9, and the input of described bleeder circuit 7 is connected with the output of two voltage-multiplying circuits 4, the output of described current foldback circuit 5 connects with the input of master controller 1, the input of described master controller 1 is also connected to A/D change-over circuit 10, the output of described overheating protection circuit 6 is all connected with the input of A/D change-over circuit 10 with the output of voltage limiter circuit 9, and the input of described A/D change-over circuit 10 is also connected to the voltage given circuit 11 of the negative direct current high voltage size exported for given described power conversion circuit, the output of described master controller 1 is connected to drive circuit 12, and described LC half-bridge resonance circuit 2 is connected with the output of drive circuit 12, the described voltage conversion circuit 24V direct voltage comprised for 24V DC power supply 16 being exported is converted to the 5V voltage conversion circuit 13 of 5V, the 3.3V voltage conversion circuit 14 that 5V direct voltage for being exported by 5V voltage conversion circuit 13 is converted to 3.3V and the 3.3V direct voltage being used for 3.3V voltage conversion circuit 14 to export are converted to the 1.5V voltage conversion circuit 15 of 1.5V, described master controller 1 all connects with the output of 3.3V voltage conversion circuit 14 and 1.5V voltage conversion circuit 15, described current foldback circuit 5, overheating protection circuit 6, A/D change-over circuit 10, voltage given circuit 11 and drive circuit 12 all connect with the output of 5V voltage conversion circuit 13.

As shown in Figure 2, in the present embodiment, described LC half-bridge resonance circuit 2 comprises NMOS power tube Q3, inductance L 1, nonpolar electric capacity C3, nonpolar electric capacity C4 and nonpolar electric capacity C5, the grid of described NMOS power tube Q3 is connected with the output PFM of drive circuit 12 by resistance R12, one end of described inductance L 1 connects with the output DV24V of 24V DC power supply 16, the described source electrode of NMOS power tube Q3 and the other end of inductance L 1, one end of nonpolar electric capacity C3 and one end of nonpolar electric capacity C5 connect and are the output of LC half-bridge resonance circuit 2, the drain electrode of described NMOS power tube Q3 is by resistance R13 ground connection, the described drain electrode of NMOS power tube Q3 and the link of resistance R13 are the current signal sampling end CUR_FB of LC half-bridge resonance circuit 2, the other end of described nonpolar electric capacity C3 is by nonpolar electric capacity C4 ground connection, the other end ground connection of described nonpolar electric capacity C5, the drive singal that fpga chip EP2C5T144C8N exports carries out the conducting of control NMOS power tube Q3 after power amplification and pass section through overdrive circuit 12, when the drive singal that fpga chip EP2C5T144C8N exports is high level, drive circuit 12 output low level, NMOS power tube Q3 conducting, when the drive singal that fpga chip EP2C5T144C8N exports is low level, drive circuit 12 exports high level, and NMOS power tube Q3 turns off, thus makes LC half-bridge resonance circuit 2 export resonance signal.

As shown in Figure 2, in the present embodiment, described piezoelectric ceramic transformer 3 is multilayer piezoelectric ceramic transformer MPT1, one end of the primary piezo oscillator of described multilayer piezoelectric ceramic transformer MPT1 connects with the output of LC half-bridge resonance circuit 2, the other end ground connection of the primary piezo oscillator of described multilayer piezoelectric ceramic transformer MPT1, one end of the secondary piezoelectric oscillator of described multilayer piezoelectric ceramic transformer MPT1 is the output of piezoelectric ceramic transformer 3; Described piezoelectric ceramic transformer 3 carries out power amplification for the resonance signal exported LC half-bridge resonance circuit 2.

As shown in Figure 2, in the present embodiment, described two voltage-multiplying circuits 4 are made up of diode D1, diode D2 and nonpolar electric capacity C6, the anode of described diode D1 and the negative electrode of diode D2 all connect with the output of piezoelectric ceramic transformer 3, the minus earth of described diode D1, the anode of described diode D2 be two voltage-multiplying circuits 4 output HV and by nonpolar electric capacity C6 ground connection.The output HV of described two voltage-multiplying circuits 4 is the output of described power conversion circuit, and the output of described power conversion circuit is the-6.5kV of this air negative ion generator ~-11kV negative direct current high voltage output.

As shown in Figure 3, in the present embodiment, described master controller 1 is fpga chip EP2C5T144C8N.

As shown in Figure 3, in the present embodiment, described A/D change-over circuit 10 comprises modulus conversion chip AD7862, the Verf pin of described modulus conversion chip AD7862 and VDD pin all connect with the output DC5V of 5V voltage conversion circuit 13, the DB0 pin of described modulus conversion chip AD7862, DB1 pin, DB2 pin, DB3 pin, DB4 pin, DB5 pin, DB6 pin, DB7 pin, DB8 pin, DB9 pin, DB10 pin and DB11 pin are corresponding in turn to the 94th pin with fpga chip EP2C5T144C8N, 93rd pin, 92nd pin, 87th pin, 86th pin, 81st pin, 80th pin, 79th pin, 76th pin, 75th pin, 74th pin and the 73rd pin connect, described modulus conversion chip AD7862's pin, BUSY pin, RD pin, CS pin and A0 pin are corresponding in turn to and connect with the 4th pin of fpga chip EP2C5T144C8N, the 3rd pin, the 7th pin, the 8th pin and the 24th pin, the VB1 pin of described modulus conversion chip AD7862 connects with the output FB of voltage limiter circuit 9 and by nonpolar electric capacity C1 ground connection, the VA1 pin of described modulus conversion chip AD7862 connects with the output OTP of overheating protection circuit 6, and the VB2 pin of described modulus conversion chip AD7862 connects with the output terminals A DJ of voltage given circuit 11, described voltage given circuit 11 is made up of slide rheostat VR1 and nonpolar electric capacity C2, the output of the one termination 5V voltage conversion circuit 13 of described slide rheostat VR1, the other end ground connection of described slide rheostat VR1, the sliding end of described slide rheostat VR1 is the output terminals A DJ of voltage given circuit 11, and by nonpolar electric capacity C2 ground connection.A/D change-over circuit 10 exports to fpga chip EP2C5T144C8N after carrying out A/D conversion for the signal exported overheating protection circuit 6 and voltage limiter circuit 9.

As shown in Figure 3, in the present embodiment, described drive circuit 12 is made up of symmetrical triode Q1, triode Q2, resistance R1 and resistance R2, and described symmetrical triode Q1 is made up of triode Q1-2 under triode Q1-1 in NPN type and positive-negative-positive, the base stage of described triode Q2 is the input of drive circuit 12 and connects with the 9th pin of fpga chip EP2C5T144C8N, the collector electrode of described triode Q2, in NPN type, under the base stage of triode Q1-1 and positive-negative-positive, the base stage of triode Q1-2 is all connected with the output DC5V of 5V voltage conversion circuit 13 by resistance R2, in described NPN type, the collector electrode of triode Q1-1 is connected with the output DC5V of 5V voltage conversion circuit 13 by resistance R1, the equal ground connection of collector electrode of triode Q1-2 under the emitter of described triode Q2 and positive-negative-positive, in described NPN type, under the emitter of triode Q1-1 and positive-negative-positive, the emitter of triode Q1-2 connects and is the output PFM of drive circuit 12.Described drive circuit 12 has been mainly used in the power amplification to the drive singal that fpga chip EP2C5T144C8N exports, the drive singal that fpga chip EP2C5T144C8N exports is by the on-off action of triode Q2, at the collector electrode output switch pulse signal of triode Q2, drive that symmetrical triode Q1's is open-minded, thus the drive singal after power output amplification is to power conversion circuit, specifically, when the drive singal that fpga chip EP2C5T144C8N exports is high level, triode Q2 conducting, in NPN type in symmetrical triode Q1, triode Q1-1 ends, triode Q1-2 conducting under positive-negative-positive, the output of drive circuit 12 exports as low level, when the drive singal that fpga chip EP2C5T144C8N exports is low level, triode Q2 ends, triode Q1-1 conducting in the NPN type in symmetrical triode Q1, and under positive-negative-positive, triode Q1-2 ends, and the output of drive circuit 12 exports as high level.

As shown in Figure 4, in the present embodiment, described bleeder circuit 7 is made up of the resistance R16 connected and resistance R17, and the one end after described resistance R16 and resistance R17 connects is the input HV_FB of bleeder circuit 7, other end ground connection; Described half-wave rectifying circuit 8 is made up of diode D5, diode D6 and nonpolar electric capacity C13, the anode of described diode D5 and the negative electrode of diode D6 all connect with the link of resistance R16 and resistance R17, the anode of described diode D6 and the equal ground connection of the other end of nonpolar electric capacity C13; Described voltage limiter circuit 9 is made up of voltage stabilizing didoe DZ3, and the negative electrode of described voltage stabilizing didoe DZ3 connects with the negative electrode of diode D5 and is the output FB of voltage limiter circuit 9, the plus earth of described voltage stabilizing didoe DZ3.Half-wave rectifying circuit 8 is exported to after the signal dividing potential drop that two voltage-multiplying circuits 4 export by described bleeder circuit 7, halfwave rectifier is become the direct current of pulsation by half-wave rectifying circuit 8, again through the amplitude limit of voltage stabilizing didoe DZ3, prevent output feedack overtension from damaging master controller 1, the negative high voltage feedback signal after amplitude limit exports to A/D change-over circuit 10.

As shown in Figure 5, in the present embodiment, described current foldback circuit 5 comprises comparator U8B, triode Q1, the reference voltage circuit connected with the in-phase input end of comparator U8B and the Signal Collection and amplify circuit connected with the inverting input of comparator U8B, described reference voltage circuit is by resistance R19, resistance R20, voltage stabilizing didoe DZ4 and nonpolar electric capacity C14 forms, one end after described resistance R19 and resistance R20 connects connects with the output DC5V of 5V voltage conversion circuit 13, other end ground connection, the link of described resistance R19 and resistance R20 is the reference voltage output terminal of reference voltage circuit, the negative electrode of described voltage stabilizing didoe DZ4 and one end of nonpolar electric capacity C14 all connect with the output DC5V of 5V voltage conversion circuit 13, the anode of described voltage stabilizing didoe DZ4 and the equal ground connection of the other end of nonpolar electric capacity C14, described Signal Collection and amplify circuit is made up of operational amplifier U8A, resistance R21, resistance R22 and nonpolar electric capacity C15, the in-phase input end of described operational amplifier U8A is current signal input and connects with the current signal sampling end CUR_FB of LC half-bridge resonance circuit 2, the inverting input of described operational amplifier U8A is by resistance R22 ground connection, between the inverting input that described resistance R21 and nonpolar electric capacity C15 is connected in parallel on operational amplifier U8A and output, the output of described operational amplifier U8A is the output of Signal Collection and amplify circuit, the base stage of described triode Q1 connects with the output of comparator U8B, the grounded collector of described triode Q1, the transmitting of described triode Q1 very current foldback circuit 5 output OCP and connected with the output DC5V of 5V voltage conversion circuit 13 by resistance R18, during concrete enforcement, the output OCP of described current foldback circuit 5 connects with the 2nd pin of fpga chip EP2C5T144C8N, described Signal Collection and amplify circuit is used for gathering and Linear Amplifer the voltage at the resistance R13 two ends from LC half-bridge resonance circuit 2, the signal after Linear Amplifer is sent into again the inverting input of comparator U8B, described reference voltage circuit sends into the in-phase input end of comparator U8B with reference to voltage signal, when the voltage at resistance R13 two ends is greater than reference voltage, comparator U8B exports as low level, now triode Q1 conducting, and current foldback circuit 5 output low level is to master controller 1,

In the present embodiment, described overheating protection circuit 6 is made up of temperature sensor MCP9701.Temperature sensor MCP9701 is linear temperature element, and its power supply voltage range is 3.1V ~ 5.5V, and temperature measurement range is-40 DEG C ~ 125 DEG C, does not need other external devices, just the detection of energy complete independently temperature.The output of described temperature sensor MCP9701 is the output OTP of overheating protection circuit 6.

As shown in Figure 6, in the present embodiment, described 5V voltage conversion circuit 13 comprises step-down switching regulator MCP16301, switching diode D3, switching diode D4, voltage stabilizing didoe DZ1, voltage stabilizing didoe DZ2 and inductance L 2,4th pin of described step-down switching regulator MCP16301 and the 5th pin are all connected with the negative electrode of switching diode D3 by insurance F1, and by polar capacitor C7 ground connection, the anode of described switching diode D3 and the negative electrode of voltage stabilizing didoe DZ1 all connect with the output DV24V of 24V DC power supply 16, the plus earth of described voltage stabilizing didoe DZ1, 1st pin of described step-down switching regulator MCP16301 connects with the negative electrode of switching diode D4, and connected with the negative electrode of voltage stabilizing didoe DZ2 and one end of inductance L 2 by nonpolar electric capacity C12, the plus earth of described voltage stabilizing didoe DZ2, the anode of described switching diode D4 and the other end of inductance L 2 connect and are the output DC5V of 5V voltage conversion circuit 13, and by polar capacitor C8 ground connection, the output DC5V of described 5V voltage conversion circuit 13 be connected to the resistance R14 and resistance R15 that connect between ground, the 3rd pin of described step-down switching regulator MCP16301 connects with the link of resistance R14 and resistance R15, during concrete enforcement, the 2nd pin ground connection of described step-down switching regulator MCP16301, the operation principle of described 5V voltage conversion circuit 13 is: when the 4th pin input voltage of step-down switching regulator MCP16301 is higher than 3.5V, step-down switching regulator MCP16301 starts working, the inner built-in low resistance N-channel MOS FET of step-down switching regulator MCP16301, when low resistance N-channel MOS FET disconnects, inductance L 2 charges to nonpolar electric capacity C12 through switching diode D4, make the grid voltage of low resistance N-channel MOS FET higher than drain voltage, low resistance N-channel MOS FET just possibility conducting, concrete voltage-regulation process is when output feedack voltage sends into the 3rd pin of step-down switching regulator MCP16301 by resistance R14 and resistance R15, when the 3rd pin voltage of step-down switching regulator MCP16301 is lower than 0.8V, low resistance N-channel MOS FET closes, inductive current increases, and output voltage increases, when the 3rd pin voltage of step-down switching regulator MCP16301 is higher than 0.8V, low resistance N-channel MOS FET opens, and inductive current reduces, and output voltage reduces, and achieves voltage stabilizing.

As shown in Figure 6, in the present embodiment, described 3.3V voltage conversion circuit 14 comprises chip AMS1117-3.3V, 3rd pin of described chip AMS1117-3.3V connects with the output DC5V of 5V voltage conversion circuit 13, and by polar capacitor C9 ground connection, the 1st pin ground connection of described chip AMS1117-3.3V, the 2nd pin of described chip AMS1117-3.3V is the output DC3.3V of 3.3V voltage conversion circuit 14, and by polar capacitor C10 ground connection;

As shown in Figure 6, in the present embodiment, described 1.5V voltage conversion circuit 15 comprises chip AMS1117-1.5V, 3rd pin of described chip AMS1117-1.5V connects with the output DC3.3V of 3.3V voltage conversion circuit 14, the 1st pin ground connection of described chip AMS1117-1.5V, 2nd pin of described chip AMS1117-1.5V is the output DC1.5V of 1.5V voltage conversion circuit 15, and by polar capacitor C11 ground connection.

When the utility model uses, the output voltage of this air negative ion generator is set by voltage given circuit 11, master controller 1 drives LC half-bridge resonance circuit 2 to work by drive circuit 12, then exports negative direct current high voltage signal after piezoelectric ceramic transformer 3 transformation, two voltage-multiplying circuit 4 multiplication of voltages.

The above; it is only preferred embodiment of the present utility model; not the utility model is imposed any restrictions; every above embodiment is done according to the utility model technical spirit any simple modification, change and equivalent structure change, all still belong in the protection range of technical solutions of the utility model.

Claims

1. an air negative ion generator, it is characterized in that: the 24V DC voltage conversion comprised for 24V DC power supply (16) is exported be the negative direct current high voltage of-6.5kV ~-11kV power conversion circuit, for the master controller (1) that controls power conversion circuit and the voltage conversion circuit for powering for power circuit each in air negative ion generator, and protective circuit and for negative direct current high voltage signal feedback that described power conversion circuit is exported to the negative high voltage feedback circuit of master controller (1), described power conversion circuit is made up of the LC half-bridge resonance circuit (2) connected successively, piezoelectric ceramic transformer (3) and two voltage-multiplying circuits (4), and described LC half-bridge resonance circuit (2) is connected with the output of 24V DC power supply (16), described protective circuit comprises and to be connected with the current signal sampling end of LC half-bridge resonance circuit (2) and for the current foldback circuit (5) protected piezoelectric ceramic transformer (3) overcurrent with for the overheated overheating protection circuit (6) protected of piezoelectric ceramic transformer (3), described negative high voltage feedback circuit is made up of the bleeder circuit connected successively (7), half-wave rectifying circuit (8) and voltage limiter circuit (9), and the input of described bleeder circuit (7) is connected with the output of two voltage-multiplying circuits (4), the output of described current foldback circuit (5) connects with the input of master controller (1), the input of described master controller (1) is also connected to A/D change-over circuit (10), the output of described overheating protection circuit (6) is all connected with the input of A/D change-over circuit (10) with the output of voltage limiter circuit (9), and the input of described A/D change-over circuit (10) is also connected to the voltage given circuit (11) of the negative direct current high voltage size exported for given described power conversion circuit, the output of described master controller (1) is connected to drive circuit (12), and described LC half-bridge resonance circuit (2) is connected with the output of drive circuit (12), the described voltage conversion circuit 24V direct voltage comprised for 24V DC power supply (16) being exported is converted to the 5V voltage conversion circuit (13) of 5V, 5V direct voltage for being exported by 5V voltage conversion circuit (13) is converted to the 1.5V voltage conversion circuit (15) that the 3.3V voltage conversion circuit (14) of 3.3V and the 3.3V direct voltage for being exported by 3.3V voltage conversion circuit (14) are converted to 1.5V, described master controller (1) all connects with the output of 3.3V voltage conversion circuit (14) and 1.5V voltage conversion circuit (15), described current foldback circuit (5), overheating protection circuit (6), A/D change-over circuit (10), voltage given circuit (11) and drive circuit (12) all connect with the output of 5V voltage conversion circuit (13).

2. according to air negative ion generator according to claim 1, it is characterized in that: described LC half-bridge resonance circuit (2) comprises NMOS power tube Q3, inductance L 1, nonpolar electric capacity C3, nonpolar electric capacity C4 and nonpolar electric capacity C5, the grid of described NMOS power tube Q3 is connected with the output of drive circuit (12) by resistance R12, one end of described inductance L 1 connects with the output of 24V DC power supply (16), the described source electrode of NMOS power tube Q3 and the other end of inductance L 1, one end of nonpolar electric capacity C3 and one end of nonpolar electric capacity C5 connect and are the output of LC half-bridge resonance circuit (2), the drain electrode of described NMOS power tube Q3 is by resistance R13 ground connection, the described drain electrode of NMOS power tube Q3 and the link of resistance R13 are the current signal sampling end of LC half-bridge resonance circuit (2), the other end of described nonpolar electric capacity C3 is by nonpolar electric capacity C4 ground connection, the other end ground connection of described nonpolar electric capacity C5, described piezoelectric ceramic transformer (3) is multilayer piezoelectric ceramic transformer MPT1, one end of the primary piezo oscillator of described multilayer piezoelectric ceramic transformer MPT1 connects with the output of LC half-bridge resonance circuit (2), the other end ground connection of the primary piezo oscillator of described multilayer piezoelectric ceramic transformer MPT1, one end of the secondary piezoelectric oscillator of described multilayer piezoelectric ceramic transformer MPT1 is the output of piezoelectric ceramic transformer (3), described two voltage-multiplying circuits (4) are made up of diode D1, diode D2 and nonpolar electric capacity C6, the anode of described diode D1 and the negative electrode of diode D2 all connect with the output of piezoelectric ceramic transformer (3), the minus earth of described diode D1, the anode of described diode D2 is the output of two voltage-multiplying circuits (4) and passes through nonpolar electric capacity C6 ground connection.

3. according to air negative ion generator according to claim 1, it is characterized in that: described master controller (1) is fpga chip EP2C5T144C8N.

4. according to air negative ion generator according to claim 3, it is characterized in that: described A/D change-over circuit (10) comprises modulus conversion chip AD7862, the Verf pin of described modulus conversion chip AD7862 and VDD pin all connect with the output of 5V voltage conversion circuit (13), the DB0 pin of described modulus conversion chip AD7862, DB1 pin, DB2 pin, DB3 pin, DB4 pin, DB5 pin, DB6 pin, DB7 pin, DB8 pin, DB9 pin, DB10 pin and DB11 pin are corresponding in turn to the 94th pin with fpga chip EP2C5T144C8N, 93rd pin, 92nd pin, 87th pin, 86th pin, 81st pin, 80th pin, 79th pin, 76th pin, 75th pin, 74th pin and the 73rd pin connect, described modulus conversion chip AD7862's pin, BUSY pin, RD pin, CS pin and A0 pin are corresponding in turn to and connect with the 4th pin of fpga chip EP2C5T144C8N, the 3rd pin, the 7th pin, the 8th pin and the 24th pin, the VB1 pin of described modulus conversion chip AD7862 connects with the output of voltage limiter circuit (9) and by nonpolar electric capacity C1 ground connection, the VA1 pin of described modulus conversion chip AD7862 connects with the output of overheating protection circuit (6), and the VB2 pin of described modulus conversion chip AD7862 connects with the output of voltage given circuit (11), described voltage given circuit (11) is made up of slide rheostat VR1 and nonpolar electric capacity C2, the output of the one termination 5V voltage conversion circuit (13) of described slide rheostat VR1, the other end ground connection of described slide rheostat VR1, the sliding end of described slide rheostat VR1 is the output of voltage given circuit (11), and by nonpolar electric capacity C2 ground connection.

5. according to air negative ion generator according to claim 3, it is characterized in that: described drive circuit (12) is made up of symmetrical triode Q1, triode Q2, resistance R1 and resistance R2, described symmetrical triode Q1 is made up of triode Q1-2 under triode Q1-1 in NPN type and positive-negative-positive, the base stage of described triode Q2 is the input of drive circuit (12) and connects with the 9th pin of fpga chip EP2C5T144C8N, the collector electrode of described triode Q2, in NPN type, under the base stage of triode Q1-1 and positive-negative-positive, the base stage of triode Q1-2 is all connected with the output of 5V voltage conversion circuit (13) by resistance R2, in described NPN type, the collector electrode of triode Q1-1 is connected with the output of 5V voltage conversion circuit (13) by resistance R1, the equal ground connection of collector electrode of triode Q1-2 under the emitter of described triode Q2 and positive-negative-positive, in described NPN type, under the emitter of triode Q1-1 and positive-negative-positive, the emitter of triode Q1-2 connects and is the output of drive circuit (12).

6. according to air negative ion generator according to claim 1, it is characterized in that: described bleeder circuit (7) is made up of the resistance R16 connected and resistance R17, one end after described resistance R16 and resistance R17 connects is the input of bleeder circuit (7), other end ground connection; Described half-wave rectifying circuit (8) is made up of diode D5, diode D6 and nonpolar electric capacity C13, the anode of described diode D5 and the negative electrode of diode D6 all connect with the link of resistance R16 and resistance R17, the anode of described diode D6 and the equal ground connection of the other end of nonpolar electric capacity C13; Described voltage limiter circuit (9) is made up of voltage stabilizing didoe DZ3, and the negative electrode of described voltage stabilizing didoe DZ3 connects with the negative electrode of diode D5 and is the output of voltage limiter circuit (9), the plus earth of described voltage stabilizing didoe DZ3.

7. according to air negative ion generator according to claim 1, it is characterized in that: described current foldback circuit (5) comprises comparator U8B, triode Q1, the reference voltage circuit connected with the in-phase input end of comparator U8B and the Signal Collection and amplify circuit connected with the inverting input of comparator U8B, described reference voltage circuit is by resistance R19, resistance R20, voltage stabilizing didoe DZ4 and nonpolar electric capacity C14 forms, one end after described resistance R19 and resistance R20 connects connects with the output of 5V voltage conversion circuit (13), other end ground connection, the link of described resistance R19 and resistance R20 is the reference voltage output terminal of reference voltage circuit, the negative electrode of described voltage stabilizing didoe DZ4 and one end of nonpolar electric capacity C14 all connect with the output of 5V voltage conversion circuit (13), the anode of described voltage stabilizing didoe DZ4 and the equal ground connection of the other end of nonpolar electric capacity C14, described Signal Collection and amplify circuit is made up of operational amplifier U8A, resistance R21, resistance R22 and nonpolar electric capacity C15, the in-phase input end of described operational amplifier U8A is current signal input and connects with the current signal sampling end of LC half-bridge resonance circuit (2), the inverting input of described operational amplifier U8A is by resistance R22 ground connection, between the inverting input that described resistance R21 and nonpolar electric capacity C15 is connected in parallel on operational amplifier U8A and output, the output of described operational amplifier U8A is the output of Signal Collection and amplify circuit, the base stage of described triode Q1 connects with the output of comparator U8B, the grounded collector of described triode Q1, the transmitting of described triode Q1 very current foldback circuit (5) output and connected with the output of 5V voltage conversion circuit (13) by resistance R18, described overheating protection circuit (6) is made up of temperature sensor MCP9701.

8. according to air negative ion generator according to claim 1, it is characterized in that: described 5V voltage conversion circuit (13) comprises step-down switching regulator MCP16301, switching diode D3, switching diode D4, voltage stabilizing didoe DZ1, voltage stabilizing didoe DZ2 and inductance L 2,4th pin of described step-down switching regulator MCP16301 and the 5th pin are all connected with the negative electrode of switching diode D3 by insurance F1, and by polar capacitor C7 ground connection, the anode of described switching diode D3 and the negative electrode of voltage stabilizing didoe DZ1 all connect with the output of 24V DC power supply (16), the plus earth of described voltage stabilizing didoe DZ1, 1st pin of described step-down switching regulator MCP16301 connects with the negative electrode of switching diode D4, and connected with the negative electrode of voltage stabilizing didoe DZ2 and one end of inductance L 2 by nonpolar electric capacity C12, the plus earth of described voltage stabilizing didoe DZ2, the anode of described switching diode D4 and the other end of inductance L 2 connect and are the output of 5V voltage conversion circuit (13), and by polar capacitor C8 ground connection, the output of described 5V voltage conversion circuit (13) be connected to the resistance R14 and resistance R15 that connect between ground, the 3rd pin of described step-down switching regulator MCP16301 connects with the link of resistance R14 and resistance R15, described 3.3V voltage conversion circuit (14) comprises chip AMS1117-3.3V, 3rd pin of described chip AMS1117-3.3V connects with the output of 5V voltage conversion circuit (13), and by polar capacitor C9 ground connection, the 1st pin ground connection of described chip AMS1117-3.3V, 2nd pin of described chip AMS1117-3.3V is the output of 3.3V voltage conversion circuit (14), and by polar capacitor C10 ground connection, described 1.5V voltage conversion circuit (15) comprises chip AMS1117-1.5V, 3rd pin of described chip AMS1117-1.5V connects with the output of 3.3V voltage conversion circuit (14), the 1st pin ground connection of described chip AMS1117-1.5V, 2nd pin of described chip AMS1117-1.5V is the output of 1.5V voltage conversion circuit (15), and by polar capacitor C11 ground connection.