CN106463915A - Automatically balanced micro-pulsed ionizing blower - Google Patents

Abstract

In one embodiment of the invention, a method of automatically balancing ionized air stream created in bipolar corona discharge is provided. The method comprises: providing an air moving device with at least one ion emitter and reference electrode connected to a micro-pulsed AC power source, and a control system with at least one ion balance monitor and corona discharge adjustment control; generating variable polarity groups of short duration ionizing micro-pulses: wherein said micro-pulses are predominantly asymmetric in amplitude and duration of both polarity voltages and have a magnitude of at least one polarity ionizing pulses exceed the corona threshold.

Description

Self balancing micropulse ionizes blower fan

The cross reference of related application

The application is that the part of the U. S. application the 13/367,369th submitted for 6th for 2 months for 2012 continues application.U.S. Shen Please No. 13/367,369 here be incorporated herein by reference completely.

Background technology

1. technical field

Embodiments of the invention relate generally to ionize blower fan.

2. background technology

Electrostatic charge neutralizer is designed to remove or to minimize electrostatic charges accumulated.Electrostatic charge neutralizer pass through produce air from Son and those ion transport are made a return journey to powered target destatic lotus.

One specific kind of electrostatic charge neutralizer is ionization blower fan.Ionization blower fan generally with corona electrode produce air from Son, and use fan (or multiple fan) by air ion towards goal directed interested.

The performance of monitoring or control blower fan utilizes two measurements.

First is measured as balancing.When the number of positive air ion is equal to the number of negative air ion, preferably balanced-out Existing.On charge plates monitor, preferable reading is zero.In practice, static neutralizer is controlled in the minizone of zero surrounding. For example, the balance of static neutralizer can be defined as substantially ± 0.2 volt.

Second is measured as air ion electric current.Higher air ion electric current is useful, because can be in week short period Interim electrostatic charge is discharged.Higher air ion electric current and the low discharge time correlation with the measurement of charge plates monitor.

Content of the invention

In an embodiment of the present invention, a kind of air stream of the ionization that autobalance formed in bipolar corona discharge is provided Method.Methods described includes：There is provided at least one ion emitters with the AC power supplies being connected to micropulse and with reference to electricity The air moving device of pole, and there is the control system that at least one ionic equilibrium monitor and corona discharge adjustment control；Produce What raw short duration ionized micropulse can Variable Polarity group：Wherein said micropulse two polar voltages amplitude and continue Mainly asymmetric in time, and make the size of at least one polarity ionization pulse exceed corona threshold.

In another embodiment of the invention, provide a kind of equipment for self balancing ionization blower fan.Described equipment Including：Air moving device and at least one ion emitters and reference electrode, they are all connected to high voltage source；Put down with ion Weighing apparatus monitor；The transformator of wherein said high voltage source, described ion emitters and reference electrode are arranged in AC current circuit In closed circuit, and described loop is grounded by high level sensitive resistor.

Brief description

By referring to the various embodiments describing the disclosure recommended as example using figure below in detail, wherein Like mark Note indicates similar components, and in the accompanying drawings：

Figure 1A is the block diagram of the general view of the ionization blower fan according to embodiments of the invention.

Figure 1B is the cross-sectional view of the blower fan of Figure 1A.

Fig. 1 C is the block diagram of the sensor being included according to the ionization blower fan of embodiments of the invention.

Fig. 2A is the frame ionizing blower fan and the air stream of ionization from blower fan of the Figure 1A according to embodiments of the invention Figure.

Fig. 2 B is the electrical diagram according to the system in the ionization blower fan of embodiments of the invention.

Fig. 3 is the flow chart of the feedback algorithm 300 according to embodiments of the invention.

Fig. 4 is the flow chart of the micropulse generator algorithm that the micropulse generator according to embodiments of the invention controls.

Fig. 5 A is the flow chart of the system operatio according to embodiments of the invention during the formation of negative pulse train.

Fig. 5 B is the flow chart of the system operatio according to embodiments of the invention during the formation of positive pulse train.

Fig. 6 is the flow chart of the system operatio according to embodiments of the invention during current impulse phase.

Fig. 7 is the flow chart of the system operatio according to embodiments of the invention during sensor input measurement.

Fig. 8 is the oscillogram of the micropulse according to embodiments of the invention.

Fig. 9 is the flow chart of the system operatio according to embodiments of the invention during balance alarm.

Specific embodiment

In the following specifically describes, for purposes of explanation, illustrate that numerous details are various to the present invention to provide The thorough understanding of embodiment.One of ordinary skill in the art will be recognized that, these various embodiments of the present invention are simply said Bright property and be never intended to be restricted.The other embodiment of the present invention be readily able to emerge be benefited in this article disclosed in In the brain of these technicians.

Embodiments of the invention can be applicable to perhaps eurypalynous air ionizer, they be configured to (such as) ionization bar, Blower fan or embedded ionization device.

The ionization blower fan of broad covered area needs efficient air ionization to control with short discharge time and strict ionic equilibrium Combination.Figure 1A is the block diagram of the general view of the ionization blower fan 100 according to embodiments of the invention, and Figure 1B is the blower fan of Figure 1A 100 along line A-A cross-sectional view.Efficient air ionization is by array (that is, the emitter stage lattice array in transmitting limit 102 102) formed and two reference electrodes 104,105 (being illustrated as top reference electrode 104 and bottom reference electrode 105) between is double Pole corona discharge is realizing.Transmitting limit 102 is installed in protectiveness panel 106 (that is, ventilating duct 106), described protectiveness Panel 106 also comparably helps speed up the flowing of ionized air.

Fan 103 (Figure 1A) is in emitter stage lattice array 102 (ion emitters 102) and two reference electrodes 104,105 Between space 130 in the air moving device of alterable height air stream 125 is provided.Ventilating duct 106 is concentrated air stream 125 and is incited somebody to action Air stream 125 is distributed in the space 130 of corona discharge.The positive and negative ion that corona produces is between electrode 102,104 and 105 Mobile.Air flow 125 can obtain and take away the only relatively small part in the positive and negative ion being formed by corona discharge.

According to one embodiment of present invention, force air 125 to leave ventilating duct (106) outlet 131, and air 125 leads to Cross air ionization sensor 101.The details of one embodiment of the design of sensor 101 is showed in Fig. 1 C.Fan is (in Figure 1B In be shown as frame 126) provide air 125 flowing.Air ionization voltage sensor 101 has exhibition in the overall with of pipeline 106 The thin dielectric sheet of flap type 109 opened.Louver board 109 guiding is from the air stream of pipeline 106 and the ionization of upper electrode 104 A part of 125a (or sample 125a) (see also Fig. 2A) of 125b (one air 125b of ionization), so that sensor Some in ionic charge in the 101 a part of 125a of air stream 125b that can sense and collect ionization.The ion-conductance collected Lotus is subsequently formed control signal 250 (Fig. 2), described control signal 250 by algorithm 300 (Fig. 3) using balance ionization blower fan 100 In ion.The top side 132 of plate 109 has the narrow bonding jumper serving as sensitive electrode 108, and bottom side 133 have wider Ground connection simple electrode 110.This electrode 110 is generally shielded, so that air ionization sensor 101 and emitter stage lattice array 102 high electric field shields.Some in the electric charge of electrode 108 collection of ions, thus lead to ionization air stream 125b in The proportional voltage/signal 135 (Fig. 2A) of ionic equilibrium.From sensor 101 voltage/signal 135 by control system 107 (being shown as system 200 in Fig. 2) is using monitoring and adjust the ionic equilibrium in air stream 125b of ionization.This signal 135 is also Represented by signal 250, described signal 250 is imported in sampling as will be further discussed and holding circuit 205.Ion The other configurations (for example, in the form of the conductivity panel being immersed in ion stream or wire netting) of balance sensor can also be used for In the other embodiment of the present invention.

According to another embodiment of the present invention, monitor ionization mobile equilibrium using ion current sensor 204.Therefore, this A bright embodiment provides system 200 (Fig. 2), and it includes passing for the ionization return current of the air mobile equilibrium of monitoring ionization Sensor 204.In another embodiment of the invention, system 200 includes the air ionization of the air mobile equilibrium for monitoring ionization Voltage sensor 101.

In another embodiment of the present invention, system 200 includes dual sensor, and described dual sensor includes air ionization electricity Pressure sensor 101 and ionization current Returning sensor 204, sensor 101 and 204 both of which are configured to monitor ionization Air mobile equilibrium.

Ionization return current sensor 204 includes capacitor C2 and capacitor C1, and resistor R1 and R2.Capacitor C2 The AC current path of ground connection is provided around overcurrent sensing circuit.Ion current is converted into voltage (Ii*R2) by resistor R2, and Resistor R1 and R2 and capacitor C2 forms low pass filter to leach the faradic current being formed by micropulse.From sensor 204 The return current 210 flowing out is represented as I2.

The electric current 254 flowing to transmitting limit 102 is electric current summation Σ (Ii (+), Ii (-), I2, Ic1, Ic2), wherein electric Stream Ic1 and Ic2 respectively flows through the electric current of capacitor C1 and C2.

Fig. 2A is shown in the ion current 220 of flowing between emitter stage 102 and reference electrode 104,105.From pipeline 106 Air stream 125 conversion ionization air stream 125b in this two ion currents 220 a part, air stream 125b of ionization Move to the charging neutrality target outside blower fan 100.Described target is totally shown as block 127 in fig. ib, and it can be with respect to electricity It is arranged on different positions from blower fan 100.

Fig. 2 B show ionizes the electrical diagram of the system 200 in blower fan 100 according to an embodiment of the invention.System 200 Including ion current sensor 204, (it is driven micropulse high-voltage power supply 230 (AC power supplies 230 of micropulse) by pulse Dynamic device 202 and high voltage (HV) transformator 203 are formed) and ionization blower fan control system 201.In an embodiment, control system 201 is microcontroller 201.Microcontroller 201 receives the electric power from voltage bias 256, and voltage bias 256 can be at (such as) Under about 3.3DC voltage, and microcontroller 201 is grounded at circuit 257.

Power converter 209 can be optionally used in system 200 to provide the various voltage (examples being used by system 200 As -12VDC, 12VDC or 3.3VDC).Voltage source value 258 (for example, 24VDC) can be converted into various electricity by power converter 209 Pressure 256 is to be biased to microcontroller 201.

Micropulse high-voltage power supply 230 has the pulse driver 202 being controlled by microcontroller 201.Pulse is driven Dynamic device 202 is connected to a liter rank pulse transformer 203.Transformator 203 produces short duration pulse (musec order) positive and negative Polarity, these polarity have the amplitude enough to produce corona discharge.The secondary coil of transformator 203 is to earth point Relative Floating. The high voltage terminal 250 of transformator 203 is connected to emitter stage lattice array 102, and the low voltage terminal 251 of transformator 203 connects To reference electrode 104,105.

Short duration high voltage AC pulse (being produced by high-voltage power supply 230) lead to electrode 102 and 104, The significant capacitive character of flowing or displacement current Ic1 and Ic2 between 105.For example, electric current Ic1 is in electrode (transmitting limit) Flow between 102 and top reference electrode 104, and electric current Ic2 flows between electrode 102 and bottom reference electrode 105.Labelling For Ii (+) and Ii (-) relatively small positive and negative corona of ions electric current leave this ion generating system 200 enter blower fan 100 outside Environment in and to target move.

In order to capacitive current is separated with ion current, by ion generating system 200 be arranged for being labeled as Ic1 and The closed loop circuit of the high-frequency AC capacitive current of Ic2, because the secondary coil of transformator 203 and corona electrode 102,104 and 105 Substantially with respect to ground connection point floating and ion current Ii (+) and Ii (-) there is return path to earth point (and transmission).AC Electric current has the resistance significantly lower than these AC electric currents being transferred to earth point with this loop internal circulation.

System 200 comprises ionic equilibrium monitor, and it passes through in the AC voltage source 230 of pulse, described ion emitters 102 Arrangement closed circuit current path provides the separation ion convection current of the AC electric current from pulse and reference electrode 104 or 105 between Electric current.

In addition, during the time cycle between micropulse, execution ionic equilibrium monitoring in system 200.In addition, passing through Aligning is quadratured with the differential signal of negative convection current to execute ionic equilibrium monitoring.

The transformator 203 of high voltage source 230, ion emitters 102 and reference electrode 104 or 105 are arranged for AC The closed circuit of current circuit, and closed circuit is connected to earth point by high level sensitive resistor R2.

Charge conservation theorem states, when the output (via transformator 203) of AC voltage source 230 is floated, ion current etc. In positive Ii (+) with negative Ii (-) summation of ion current.These electric currents Ii (+) and Ii (-) must be by the return in system 200 The circuit of current sensor 204 returns.The amount of each polar ion electric current is：

Ii (+)=Q (+) * N (+) * U and Ii (-)=Q (-) * N (-) .*U

Wherein Q is the electric charge of positive or negative ion, and N is ion concentration, and U is air velocity.If just Ii (+) and negative Ii The absolute value of (-) electric current is identical, then be up to ionic equilibrium.Two polarity of air ion known in the art carry about the same The electric charge (equal to an electronics) of amount.Therefore, another condition of ionic equilibrium is the equal concentrations of two polar ion.With right Ion current changes sensitive return current sensor 204 (ionic equilibrium monitor 204) and compares, air ionization voltage sensor 101 (ionic equilibrium monitors 101) are more sensitive to the change of ion concentration.Therefore, air ionization voltage sensor 101 (electric capacity Device sensor 101) response speed generally than ionization return current sensor 204 response faster.

The cation of the greater number being detected by sensor 101 leads to sensor 101 generation to be imported into sampling and protect Hold the positive output voltage of circuit 205 (and being processed by sampling and holding circuit 205).The greater number being detected by sensor 101 Anion lead to sensor 101 to produce to be imported into sampling and holding circuit 205 (and being processed by sampling and holding circuit 205) Negative output voltage.By contrast, as described in like above, positive Ii (+) and negative Ii (-) absolute value by sensor 204 Using with output signal 250, for be input in sampling and holding circuit 205 with determine and reach in ionization blower fan 100 from Quantum balancing.

Time between micropulse string, sample signal 215 is by closure switch 216, so that amplifier 218 is connected to electricity Container C3, is next based on, to the response of input signal 250, capacitor C3 is charged to a certain value.

The ion current floating in air stream is characterized by low-down frequency, and can be by flowing through high megaohm resistive electricity Road R1 and R2 to monitor up to earth point.In order that the impact of capacitive character and parasitic high frequency electric minimizes, sensor 204 has Two shunt capacitance paths including C1 and C2.

Electric current Ii (+) and Ii (-) difference continuously measured by sensor 204.Flow through the result electricity of resistance circuit R1, R2 The raw one voltage/signal of miscarriage, the ion that described voltage/signal integrates in time/is averaging with the air stream leaving blower fan is put down Weighing apparatus is proportional.The electric current that result obtains is illustrated as by summation Σ (Ii (+), the electric current 214 that Ii (-)) expresses.

By measuring the voltage output of current sensor 204, or the output by measurement voltage sensor 101, or pass through Measurement, from the voltage of air ionization sensor 101 and 204, reaches ionic equilibrium monitoring.For the sake of clarity, current sensor The voltage output of 204 voltage output and voltage sensor 101 is each shown by same signal 250 in fig. 2.This signal 250 It is applied to the input of sampling and holding circuit 205 (sample circuit 205), described sampling and holding circuit 205 are via sampling Signal 215 is controlled by microcontroller 201, and described sampled signal 215 opens switch 216 to trigger the sampling to signal 250 and guarantor Hold operation.

In the certain situation for corona system or embodiment, may compare the diagnosis from two sensors 101 and 204 Signal.These diagnostic signals are imported into sampling and holding circuit 205 as signal 250.

Then, signal 250 is being applied to the input residing at the analog-digital converter (ADC) within microcontroller 201 Adjusted by low pass filter 206 before and amplified by amplifier 207.Sampling and holding circuit 205 between the burst length to letter Numbers 250 are sampled so that noise minimization in the signal 250 that recovered.Capacitor C3 keeps last between the sampling time Signal value.Signal 250 is amplified to the more available level to microcontroller 201 by amplifier 207, and from amplifier 207 this The signal amplifying is illustrated as balanced signal 252.

Balanced signal 252 is compared by microcontroller 201 with set point signal 253, described set point signal 253 be by The reference signal that balanced adjustment potentiometer 208 produces.Set point signal 253 is the variable signal that can be adjusted by potentiometer 208.

Adjustable settings point signal 253 is to compensate the varying environment of ionization blower fan 100.For example, ionize blower fan 100 The neighbouring datum (earth point) of outfan 131 (Figure 1B) can be essentially a zero, and the datum in ionization target proximity Can be not zero.For example, if the position of ionization target has strong above earth potential value, then may lose at described position Remove more anion.Therefore, adjustable settings point signal 253 is to compensate the non-of the datum at the position of ionization target Null value.Set point signal 253 can be reduced in the case, so that microcontroller 201 driving pulse driver 202 can control HV Transformator 230 produces more cations (because relatively low to produce HV output 254, described HV output 254 at transmitting limit 102 Set-point value 253 be used as comparing to lead to the generation of more cations), to compensate negative at the position of ionization target The loss of ion.

Referring now to Fig. 2 and Fig. 8,.In an embodiment of the present invention, ionization blower fan 100 can based on following operation at least The ionic equilibrium in ionization blower fan is realized in one or more operations：(1) pass through increase and/or reduce positive pulse width value and/or Negative pulse width value, (2) are passed through to increase and/or reduce the time between time and/or the negative pulse between positive pulse, and/or (3) pass through to increase and/or reduce the number of positive pulse and/or negative pulse, as described below.Microcontroller 201 just exports Pulse output 815 and negative pulse export 816 (Fig. 2 and Fig. 8), and these outputs 815,816 are driven to pulse driver 202 and control Pulse driver 202 processed.In response to output 815 and 816, transformator 230 produces the ionization waveform being applied to transmitting limit 102 814 (HV outputs 814), to produce a certain amount of cation and a certain amount of anion based on ionization waveform 814.

As example, if the ion that sensor 101 and/or sensor 204 detect in ionization blower fan 101 is uneven, Wherein in blower fan 101, the amount of cation exceedes the amount of anion, then the balanced signal 252 entering in microcontroller 201 will Indicate that this ion is uneven.Microcontroller 201 will extend the negative pulse width (persistent period) 811 of negative pulse 804.Due to width 811 are extended, and the amplitude of therefore negative micropulse 802 increases.Positive micropulse 801 and negative micropulse 802 are to be driven to emitter stage The high voltage output of point 102.The amplitude of the increase of negative micropulse 802 will increase the anion producing from transmitting limit 102.Ionization Waveform 814 produced short duration ionize micropulse 801 and 802 can Variable Polarity group.Micropulse 801 and 802 is at two The amplitude of polar voltages and mainly asymmetric on the persistent period, and make the size of at least one polarity ionization pulse exceed corona Threshold value.

Once having reached maximum pulse for negative pulse width 811, if in blower fan 100 cation amount still above The amount of anion, then microcontroller 201 will shorten the positive pulse width (persistent period) 810 of positive pulse 803.Due to shortening Width 810, therefore reduces the amplitude of positive micropulse 801.The amplitude of the reduction of positive micropulse 801 will reduce from transmitting limit The cation of 102 generations.

As adjunctively or alternatively, if the amount of cation exceedes the amount of anion in blower fan 100, then microcontroller 201 The time between negative pulse 804 will be extended by extending negative cycle 813 (time interval between negative pulse 804).Due to prolonging Grow negative cycle 813, the time between therefore negative micropulse 802 also increases.As a result, prolongation or longer negative cycle 813 The time between negative micropulse 802 will be increased, this so that the time quantum producing anion from transmitting limit 102 will be increased.

Once having reached minimum negative cycle for negative cycle, if the amount of cation is still above anion in blower fan 100 Amount, then microcontroller 201 to shorten positive pulse 803 by being shortened by positive period 812 (time interval between positive pulse 803) Between time.Due to shortening positive period 812, the time between therefore positive micropulse 801 decreases.As a result, shortening Or shorter positive period 811 will reduce positive micropulse 803 between time, this so will reduce from launch limit 102 just produce The time quantum of ion.

As adjunctively or alternatively, if the amount of cation exceedes the amount of anion in blower fan 100, then microcontroller 201 Number by the negative pulse 804 increasing in negative pulse output 816.Microcontroller 201 has negative counting device, and it can increase meter Number is to increase the number of the negative pulse 804 in negative pulse output 816.Number due to negative pulse 804 increases, therefore in negative arteries and veins Punching output 816 in, negative pulse train increase, and which increase HV output in negative micropulse 802 number, described HV be output as by It is applied to the ionization waveform 814 of transmitting limit 102.

Once maximum quantity negative pulse is added to negative pulse output 816, if the amount of cation still surpasses in blower fan 100 Cross the amount of anion, then microcontroller 201 exports the number of the positive pulse 803 in 815 by reducing positive pulse.Microcontroller 201 have position counting device, and it can reduce counting to reduce the number of the positive pulse 803 in positive pulse output 815.Due to The number of positive pulse 803 reduces, and therefore the positive pulse train in positive pulse output 815 reduces, and which reduces in HV output The number of positive micropulse 801, described HV is output as being applied to the ionization waveform 814 of transmitting limit 102.

The ion that following instance is related to reach when the amount of anion in blower fan exceedes the amount of cation in blower fan 100 is put down Weighing apparatus.

If the ion that sensor 101 and/or sensor 204 detect in ionization blower fan 101 is uneven, wherein blower fan In 101, the amount of anion exceedes the amount of cation, then enter into the balanced signal 252 in microcontroller 201 will indicate this from Son is uneven.Microcontroller 201 will extend the positive pulse width 812 of positive pulse 803.Because width 810 extends, therefore just micro- The amplitude of pulse 801 increases.The amplitude of the increase of positive micropulse 801 will increase the cation producing from transmitting limit 102.

Once having reached maximum pulse for positive pulse width 812, if in blower fan 100 anion amount still above The amount of cation, then microcontroller 201 will shorten the negative pulse width 811 of negative pulse 804.Due to shortening width 811, because This reduces the amplitude of negative micropulse 802.The amplitude of the reduction of negative micropulse 802 will reduce from bearing that transmitting limit 102 produces Ion.

Alternatively or additionally, if in blower fan 100 anion amount still above cation amount, then microcontroller 201 will extend the time between positive pulse 803 by extending positive period 812.Because positive period 812 extends, therefore just micro- Time between pulse 801 also increases.As a result, prolongation or longer positive period 812 will increase positive micropulse 801 between Time, this so that increase from transmitting limit 102 produce cation time quantum.

Once having reached minimum positive period for positive period 812, if the amount of anion is still above cation in blower fan 100 Amount, then microcontroller 201 will by extend negative cycle 813 extend the time between negative pulse 804.Negative due to extending In the cycle 813, the time between therefore negative micropulse 802 also increases.As a result, prolongation or longer negative cycle 813 will increase Time between negative micropulse 802, this so that reduce from transmitting limit 102 produce anion time quantum.

Alternatively or additionally, if the amount of anion exceedes the amount of cation in blower fan 100, then microcontroller 201 Number by the positive pulse 803 increasing in positive pulse output 815.Microcontroller 201 has position counting device, and it can increase meter Number is to increase the number of the positive pulse 803 in positive pulse output 815.Number due to positive pulse 803 increases, therefore in Zheng Mai Positive pulse train in punching output 815 extends, and the number of the positive micropulse 801 in HV output increases, and described HV is output as being applied It is added to the ionization waveform 814 of transmitting limit 102.

Once maximum quantity positive pulse is added to positive pulse output 815, if the amount of anion is still in blower fan 100 Exceed the amount of cation, then microcontroller 201 exports the number of the negative pulse 804 in 816 by reducing negative pulse.Microcontroller 201 have negative counting device, and it can reduce counting to reduce the number of the negative pulse 804 in negative pulse output 816.Due to The number of negative pulse 804 reduces, and therefore in negative pulse output 816, negative pulse train shortens, and the negative micropulse in HV output 802 number reduces, and described HV is output as being applied to the ionization waveform 814 of transmitting limit 102.

If ion imbalance (it is reflected in balanced balanced current value 252) is not dramatically different with set point 253, then from Little adjustment in son imbalance may be enough, and microcontroller 201 can adjust pulse width 811 and/or 810 to reach ion Balance.

If ion imbalance (it is reflected in balanced balanced current value 252) is moderately from set point 253 different, then Medium adjustment in ion imbalance may be enough, and microcontroller 201 is put down with reaching ion adjustable complete cycle 813 and 812 Weighing apparatus.

If ion imbalance (it is reflected in balanced balanced current value 252) is dramatically different with set point 253, then ion is not Big adjustment in balance may be enough, and microcontroller 201 can add just and/or negative arteries and veins respectively in output 815 and 816 Punching.

In another embodiment of the present invention, persistent period (the pulse width of at least one polarity of the micropulse in Fig. 8 Degree) at least shorter about 100 times than the time interval between micropulse.

In another embodiment of the present invention, the micropulse in Fig. 8 is arranged to group/pulse in the way of following closely each other String, and one of polar impulse string comprises the positive ionization pulse between substantially 2 and 16, and just ionize with 16 substantially 2 Negative pulse train is included, the wherein time interval just and negative pulse train between is equal to about the 2 of the cycle of continuous impulse between pulse Times.

Flow chart in Fig. 3 shows the feedback algorithm 300 of system 200 according to an embodiment of the invention.By using anti- Feedback algorithm 300 provides the function that ionic equilibrium controls to run when ionizing loop ends.This algorithm is by the system in (such as) Fig. 2 200 execution.In block 301, start balance and control feedback algorithm.

In frame 302,303,304 and 305, the calculating of the controlling value of execution negative pulse width.In block 302, by from The ionic equilibrium (balancing side value (BalanceMeasurement)) of measurement deducts desired ionic equilibrium (set point (SetPoint)) carry out calculation error value (error (Error)).In frame 303, error amount is multiplied by loop gain.In frame 304 In, the calculating of controlling value is limited to minima or maximum so that controlling value is restricted and will not fall outside scope.In frame In 305, controlling value is added to last negative pulse width value.

In frame 306,307,308 and 309, increasing or decreasing pulse width.In frame 306, by negative pulse width and Big value (MAX) compares.If negative pulse width is equal to MAX, then in block 307, positive pulse width of successively decreasing, and algorithm 300 continues Continue and proceed to frame 310.If negative pulse width is not equal to MAX, then algorithm 300 proceeds to frame 308.

In frame 308, negative pulse width is compared with minima (MIN).If negative pulse width is equal to MIN, then In frame 309, positive pulse width of successively decreasing, and algorithm 300 proceeds to frame 310.If negative pulse width is not equal to MIN, then Algorithm 300 proceeds to frame 310.When negative pulse width hits its control limit, the change of positive pulse width will be to overshoot The mode of equilibrium set-points makes balance translate, thus forcing negative pulse to reach its limit.

In frame 310,311,312 and 313, when coincidence pulse width limit, (cycle increasing or decreasing pulse period (Rep-Rate)).In a block 310, positive pulse width is compared with MAX and negative pulse width is compared with MIN.If positive pulse Width is equal to MAX and negative pulse width is equal to MIN, then in frame 311, alternately, incremental positive pulse cycle (cycle (Rep- )) or successively decrease the negative pulse cycle Rate.Algorithm 300 proceeds to frame 314.If positive pulse width is not equal to MAX and negative pulse Width is not equal to MIN, then algorithm 300 proceeds to frame 312.

In frame 312, positive pulse width is compared with MIN and negative pulse width is compared with MAX.If positive pulse width Equal to MIN and negative pulse width be equal to MAX, then in frame 313, alternately, positive pulse of successively decreasing cycle (cycle (Rep- )) or the incremental negative pulse cycle Rate.Algorithm 300 proceeds to frame 314.If positive pulse width is not equal to MIN and negative pulse Width is not equal to MAX, then algorithm 300 proceeds to frame 314.

When balance is near set point, using positive and negative pulse width control.Aging or with environment with transmitting limit Regulation, positive and negative pulse width control will not have described scope, and will " hit " control limit (its maximum for just and Its minima is negative (or vice versa as the same)).When this happens, algorithm changes the positive or negative cycle, thus effectively increasing or decreasing The working time amount that positive or negative ion produces, and so that balance is translated towards set point.

In frame 314,315,316 and 317, when coincidence pulse width limit, the pulse period (cycle (Rep-Rate)) Increasing or decreasing.In block 314, the positive pulse cycle is compared with minimum pulse periodic quantity (minimum period (MIN-Rep-Rate)) And the negative pulse cycle is compared with maximum impulse periodic quantity (maximum cycle (MAX-Rep-Rate)).If the positive pulse cycle is equal to MIN-Rep-Rate and negative pulse cycle are equal to MAX-Rep-Rate, then in frame 315, are counted one by down time Individual negative pulse moves to positive pulse, and algorithm 300 then proceeds to frame 318, and in frame 318, balance controls feedback algorithm 300 Terminate.It is when ionizing waveform closing that down time counts.Down time be the negative of pulse with just and just with negative group (or Train of pulse) between time, and be defined herein as be equal to have the positive or negative cycle pulse duration counting.

If the positive pulse cycle is not equal to MIN-Rep-Rate and the negative pulse cycle is not equal to MAX-Rep-Rate, then calculate Method 300 proceeds to frame 316.

In frame 316, the positive pulse cycle is compared with MAX-Rep-Rate and by negative pulse cycle and MIN-Rep-Rate Relatively.If the positive pulse cycle is equal to MAX-Rep-Rate and the negative pulse cycle is equal to MIN-Rep-Rate, then in frame 317 In, counted by down time and a positive pulse is moved to negative pulse, and algorithm 300 then proceeds to frame 318, in frame In 318, balance controls feedback algorithm 300 to terminate.If the positive pulse cycle is not equal to MAX-Rep-Rate and negative pulse cycle not Equal to MIN-Rep-Rate, then algorithm 300 proceeds to frame 318, in frame 318, algorithm 300 terminates.

When the periodic Control hit limit, then algorithm triggers next adjustment construction quality.

Micropulse is moved to the down time pulse group of negative pulse group from positive pulse group, this makes balance negative Side translates up.On the contrary, micropulse is moved to the down time pulse group of positive pulse group from negative pulse group, this Balance is made to translate in the positive direction.Decrease this effect using down time group, and finer control is therefore provided.

Flow chart in Fig. 4 shows the algorithm 400 that micropulse generator controls.Driving pulse and the waveform of high voltage output It is illustrated in the in figure of Fig. 8.This algorithm 400 is executed by the system 200 in (such as) Fig. 2.In frame 401, start intervalometer 1 (Timer1) Interrupt Service Routine.Algorithm 400 (such as) for micropulse generator runs every 0.1 millisecond.

In frame 402, successively decrease micropulse period enumerator.This enumerator is the cycle division device enumerator of Timer1. Timer1 is the major loop timer and Pulse Width Control timer running by 0.1ms.Timer1 connects HVPS output, therefore starts Micropulse, and intervalometer 0 (Timer0) disconnects HVPS, thus terminating micropulse.Therefore, Timer1 setting cycle and triggering simulation To numeral conversion, Timer0 setting micropulse width.

In frame 403, if micropulse period enumerator is equal to 2, then execution is compared.In other words, execution test with Determine whether count from the beginning cycle division device of next micropulse is count value 2.Step in frame 403 will make ADC (micro- In controller 201) and tightly it is in the time synchronized before next micropulse transmission.If micropulse period enumerator is equal to 2, So sampling and holding circuit 205 are set to sampling configuration, as shown in frame 404.In block 405, in microcontroller 201 ADC read from sampling and holding circuit 205 sensor input signal.

If micropulse period enumerator is not equal to 2, then algorithm 400 proceeds to frame 406.

Frame 404 and 405 starts and executes analog-to-digital conversion to measure from sampling and holding circuit 205 to permit microcontroller 201 The simulation input receiving.

When enabling sampling and holding circuit 205, it is generally placed upon frame 403 and is in about 0.2 before a micropulse occurs Millisecond, wherein micropulse 803 and 804 is respectively provided with pulse width 810 and 811, signal 250 (Fig. 2) then be applied to resident Adjusted and by amplifier by low pass filter 206 before the input of analog-digital converter (ADC) within microcontroller 201 207 amplifications.Just after sampling and holding circuit 205 enable (frame 404) sampling and keep operation, signal to ADC to start Conversion (frame 405).Typically about 1.0 milliseconds of the gained sample rate of balanced signal, and synchronous with micropulse period (rep-rate). However, actual sample rate changes with the cycle 812,813 (Fig. 8) and changes (as shown in frame 310,311,312,313), but To remain synchronous with micropulse period 812,813.

According to this embodiment, before next micropulse, the method for signal sampling allows system 200 to ignore noise and (electricity Capacitively coupled) current surge and advantageously avoid damage to ionic equilibrium measured value.

In block 406, execution test is to determine whether the cycle division device enumerator of Timer1 has started to next faint pulse Punching.If micropulse period enumerator is equal to zero, then execution is compared.If micropulse period enumerator is not equal to zero, then Algorithm 400 proceeds to frame 412.If micropulse period enumerator is equal to zero, then algorithm 400 proceeds to frame 417.

In frame 417, reload micropulse period enumerator from data register.This will be (micro- for next pulse Pulse) start reload time interval.Algorithm 400 then proceeds to frame 408.

Frame 408,409 and 410 provides to determine it is to start the step that new impulse phase is also to continue with current pulse phase.

In block 408, if micropulse enumerator is equal to zero (0), then execution is compared.

If it is, then algorithm 400 proceeds to the frame 410 requiring next pulse phase place, and algorithm 400 continues Continue and proceed to frame 411.

If it is not, so algorithm 400 proceeds to the frame 409 requiring to continue current impulse phase.

In frame 411, start Timer0 (micropulse width counter).Timer0 controls micropulse width, following reference Frame 414 to 417 is discussed.

In block 412 so that all system break.In frame 413, terminate the Interrupt Service Routine of Timer1.

When expiring the Timer0 time, actual micropulse width is controlled based on frame 414 to 417.In frame 414, start The Interrupt Service Routine of Timer0.In frame 415, positive micropulse is driven and is set to pass (that is, disconnecting positive micropulse).In frame In 416, negative micropulse is driven and is set to pass (that is, disconnecting negative micropulse).In frame 417, terminate the interruption service of Timer0 Routine.

As shown in the part 450 also in Figure 40 0, for micropulse drive signal 452, the persistent period of Timer0 Micropulse width 454 equal to micropulse drive signal 452.Micropulse width 454 start from pulse rising edge 456 (its It is triggered during the starting of Timer0) and end at pulse falling edge 458 (it is triggered at the end of Timer0).

The details of the method 700 that ion balance sensor input is averaging is showed in the flow chart in Fig. 7.Frame 701 Describe to sample and the operation of holding circuit 205 and the ADC conversion from sampling and the data of holding circuit 205 to 706.? At the end of ADC conversion 701, about 0.1 millisecond afterwards, disables sampling and holding circuit 205, thus preventing noise and current surge from breaking Bad balancing side value.Gained measured value 703 and Sample Counter 705 are added to previous original measurement value summation 704 be worth, and protect Deposit it, wait and processing further.Frame 707 to 716 is for being averaging that the measured value of sensor 101 and/or 204 is averaging Routine, and obtain ionic equilibrium average value measured, it is then used by finite impulse response (FIR) combined ionic balancing a survey meansigma methodss to incite somebody to action Measuring ion meansigma methodss are combined with baseline measurement 714, thus produce finally balancing used in balance control loop Measured value.Calculating in frame 714 calculates the meansigma methodss of weighting from a series of measured value of previous sensor inputs.In frame 715 In, call event routine to make adjustment to produce to ion based on the calculating in frame 714.

System operatio during the formation of negative, positive polar impulse string for the flow chart explanation in Fig. 5 A, Fig. 5 B and Fig. 6.From Subcycle 531 is made up of the following：A series of positive pulses 502,602, are then spaced 503,603 for down time, then For a series of negative pulses 517,604, then it is spaced 518,605 for down time.Occur when specifying number an ionization circulation When 708, calculate ionic equilibrium average value measured 709, and remove original measurement value summation 710 and remove Sample Counter value 710, 711.

Referring now to Fig. 5 A, Fig. 5 B and Fig. 6.These figures are respectively according to an embodiment of the invention in negative pulse train and Zheng Mai The flow chart of the system operatio during the formation of punching string.In frame 501, begin for the next pulse phase place of negative pulse train Routine.Frame 502 to 515 describes for producing negative pulse series and the step of the down time in pulse duration.Frame 517 arrives 532 describe for producing positive pulse series and the step of the down time in pulse duration.Frame 601 to 613 describes and is used for Produce next pulse phase place or if the step of current impulse phase continuation.

Be then used by finite impulse response (FIR) calculate combination balancing average value measured with by balancing a survey meansigma methodss with previously Measured value 714 combine, thus producing final balancing side value used in balance control loop.

Balancing side value is compared, thus obtaining error amount by balance control loop 301 with set-point value 302.Error signal It is multiplied by loop gain 303, checks whether and overrun 304/ under scope 304, and be added to current negative pulse width value.

In micropulse HV supply system 202,203, the pulse width of micropulse is driven to change gained high voltage (HV) ripple 814th, 801,802 peak amplitude.In the case, change negative amplitude pulse to realize the change of ionic equilibrium.If error Signal value is more than zero, then raise negative pulse width, therefore increases negative HV pulse amplitude as a result, changing balance in a negative direction. If on the contrary, it is negative for balancing, then lower negative pulse width, therefore change balance in the positive direction.

During the continuous adjustment of negative pulse width and when condition ensures, negative pulse width can hit its control limit. In this case, for just unbalance downward 307 positive pulse width, or for negative unbalance rise 309 positive pulse width, until bearing arteries and veins Rush width can recover again to control.This method using negative, positive pulse width control produces the mean equilibrium control of about 10V Adjusting range processed, it has the stability less than 3V.

According to another embodiment, big unbalance under the conditions of, for example, when ionizing blower fan and starting, substantial amounts of pollutant tire out Long-pending or emitter stage is aging and corrosion, negative pulse width and positive pulse width are up to its control limit 310,312 with it.Here Under situation, adjust positive pulse cycle and negative pulse cycle 311,313, so that balance reaches a point, in this point, positive pulse width Fall again in its corresponding span of control with negative pulse width.Therefore, for big just unbalance condition, increase negative pulse week Phase 313, thus lead to the negative translation balancing.If condition still suffers from, then reduce the positive pulse cycle 313, thus also leading to put down The negative translation of weighing apparatus.This alternated process changing the positive/negative cycle 313 continues, until negative pulse width and positive pulse width again Fall in its span of control.Similarly, for big negative unbalance condition, increase the positive pulse cycle 311, alternately, reduce negative arteries and veins Rush the cycle 311, thus leading to the positive translation balancing.This operation continues as described above, until negative pulse width and positive pulse Width falls again in its span of control.

In the case of there is extremely unbalance condition, positive negative pulse width and positive/negative period modulation all may hit it Corresponding control limit 310,312,314,316, position counting and negative counting will then be adapted so that and equilibrate to one Individual, in this point, the positive/negative cycle falls again in its corresponding span of control.Therefore, for extreme just unbalance condition, just Step-by-step counting will reduce 317, and down time step-by-step counting 317 will increase a step-by-step counting, thus leading to balance to bear Change.

If condition still suffers from, then down time step-by-step counting 317 will be reduced, and negative counting will increase 317 One step-by-step counting, thus lead to balance to bear change further.One pulse from negative packet/go here and there just be grouped/going here and there this Translation continues, and falls again in its span of control until the positive/negative cycle.Similarly, for extremely negative unbalance condition, an arteries and veins It is punched in sometime to be grouped/go here and there from positive pulse 315 by down time step-by-step counting and move to negative pulse packet 315, from And lead to the just change balancing, fall again in its span of control until the positive/negative cycle.

In parallel procedure, balancing side value is compared with set point.If it is determined that balancing side value is in its specified range Outward, described specified range correspond to measure at 1 foot of ionizer+the average CPM (charge plates monitor) of/15V reads Number, then the control system of ionizer will trigger balance alarm.

In fig. 9, it shows the method for providing feedback routine, uneven if there is ion, then described feedback example Cheng Faqi ionic equilibrium alarm.Frame 901 to 909 executes measurement, and the measured value obtaining is compared with threshold value to determine balance alarm Whether it is initiated.Frame 910 to 916 determines whether balance alarm is initiated.

In the fixed time interval of 5 seconds, assess balancing a survey 903, when falling outside this scope, make " 1 " to be displaced to police In report depositor 904, " 0 " otherwise, is made to be displaced in alarm group register 902.When alarm group register contains value 255 (complete " 1 "), Declaration balancing a survey is in alarm state.Similarly, if alarm group register contains value 0 (complete " 0 "), then declaration balancing a survey It is not at alarm state.Ignore any value of alarm group register non-255 or 0, and the state of alarm does not change.This filter alert is led to Know, and prevent sporadic notice.As by-product, notify to postpone to allow time enough so that balance control system is from outside Stimulate and recover.

It is in another parallel procedure running at the end of every ADC conversion cycle, in figures 9 b and 9, about every 1 millisecond, prison Survey balance control system.This routine 910 is directed to restrictive condition and checks positive and negative step-by-step counting 911,912.As above, when depositing In unbalance condition and when positive/negative pulse width and positive/negative cycle are in its corresponding limit, adjust positive and negative step-by-step counting.However, When balance being made to return to normality condition and positive/negative step-by-step counting has reached it and adjusts the limit 911,912, by by alarm Depositor be set to entirely " 1 " value 913, set warning sign 914 and set two alarm state positions 915 and to force alarm state.

The methods and techniques of balance Control Scheme discussed above are not limited to the ionization blower fan of a type.It can be used for having There are the different model ionization blower fans of multiple emitter electrodes.The other application of automatic system is included with micropulse high-voltage power The model of the ionization bar of supply.

The above description of the embodiment of the explanation of the present invention is not intended in detail (including the content described in summary) Or limit the invention to disclosed precise forms.Although the specific embodiment of the present invention and example herein illustrate that Property purpose and describe, but as skilled in the art will recognize, within the scope of the invention, various equivalent modifications are can Can.

According to description described in detail above, the present invention can be carried out with these modifications.Term used in following claims It is not necessarily to be construed as limiting the invention to disclosed specific embodiment in the specification and in the claims.On the contrary, this Bright scope is all determined by the following claims explaining the religious doctrine of the establishment explained according to claims.

Claims (20)

1. the method for the air stream of the ionization that a kind of autobalance is formed in bipolar corona discharge, methods described includes：

There is provided and there is at least one ion emitters of the AC power supplies being connected to micropulse and the air moving device of reference electrode, With the control system with least one ionic equilibrium monitor and corona discharge adjustment control；

Produce short duration ionize micropulse can Variable Polarity group：

Wherein said micropulse the amplitude of two polar voltages and in the persistent period mainly asymmetric, and make at least one pole The size of the ionization pulse of property exceedes corona threshold.

2. method according to claim 1, the Duration Ratio micropulse of at least one polarity of wherein said micropulse Between time interval short at least about 100 times.

3. method according to claim 1, wherein said micropulse is arranged to group/pulse in the way of following closely each other String, and one of polar impulse string includes the positive ionization pulse between about 2 and 16；And

Negative pulse train includes, between about 2 to 16 positive ionization pulses, having between described positive pulse train and negative pulse train Time interval, described time interval is equal to about 2 times of continuous impulse cycle.

4. method according to claim 1, wherein in order to balance the air stream of ionization, described corona discharge adjustment control changes Become the number of the described pulse just and/or in negative pulse train being produced by described voltage source.

5. method according to claim 1, wherein in order to balance the air stream of ionization, described corona discharge adjustment control changes Become the persistent period of the described ionization pulse just and/or in negative pulse train being produced by described voltage source.

6. method according to claim 1, wherein in order to balance the air stream of ionization, described corona discharge adjustment control changes Become by described voltage source produce described just and/or negative pulse train ionization pulse cycle.

7. method according to claim 1, wherein said ionic equilibrium monitor pass through described pulse AC voltage source, Between described ion emitters and reference electrode, arrangement closed circuit current path separates ion convection current to provide.

8. method according to claim 1, including：Ionic equilibrium is executed during the time cycle between described micropulse Monitoring.

9. method according to claim 1, including：Just execute with the differential signal of negative convection current by integration is described Ionic equilibrium is monitored.

10. a kind of equipment for self balancing ionization blower fan (100), including：

Air moving device and at least one ion emitters and the reference electrode that are all connected to high voltage source；And

Ionic equilibrium monitor；

The transformator of wherein said high voltage source, described ion emitters and reference electrode are arranged in the closure ring of AC current circuit Lu Zhong, and described loop is connected to earth point by high level sensitive resistor.

11. equipment according to claim 10, wherein ionic equilibrium monitor includes high impedance voltage sensor, described height Impedance voltage sensor be connected to ionic equilibrium control system and the exit of described air moving device be installed on described from The downstream of sub- emitter stage.

12. equipment according to claim 10, wherein ionic equilibrium control system be configured to described ionization pulse it Between time interval from described sensitive resistor and/or voltage sensor sampled output signal.

13. equipment according to claim 10, wherein said high voltage source produces output, and described output includes：

Short duration ionization micropulse can Variable Polarity group；

Wherein said micropulse the amplitude of two polar voltages and in the persistent period mainly asymmetric, and make at least one pole The size of property ionization pulse exceedes corona threshold.

14. equipment according to claim 13, wherein said high voltage source produces output, and described output includes described faint pulse The persistent period of at least one polarity of punching, the time interval between described Duration Ratio micropulse is short at least about 100 times.

15. equipment according to claim 13, wherein said micropulse is arranged to group/arteries and veins in the way of following closely each other Punching string, and one of polar impulse string includes the positive ionization pulse between about 2 and 16；And

Include negative pulse train between about 2 and 16 positive ionization pulses, just and negative pulse train between, there is time interval described, It is equal to about 2 times of continuous impulse cycle.

16. equipment according to claim 10, further include control system, wherein in order to balance the air stream of ionization, Described control system change by described voltage source produce described just and/or negative pulse train pulse number.

17. equipment according to claim 10, further include control system, wherein in order to balance the air stream of ionization, Described control system change by described voltage source produce described just and/or negative pulse train ionization pulse persistent period.

18. equipment according to claim 10, further include control system, wherein in order to balance the air stream of ionization, Described control system change by described voltage source produce described just and/or negative pulse train ionization pulse cycle.

19. equipment according to claim 10, wherein said ionic equilibrium monitor pass through described voltage source, described from Between sub- emitter stage and reference electrode, arrangement closed circuit current path separates ion convection current to provide.

20. equipment according to claim 10, the time cycle between micropulse for the wherein said ionic equilibrium monitor Period execution ionic equilibrium monitoring.