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WO2007010873A1 - Pulvérisateur électrostatique - Google Patents

Pulvérisateur électrostatique Download PDF

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Publication number
WO2007010873A1
WO2007010873A1 PCT/JP2006/314101 JP2006314101W WO2007010873A1 WO 2007010873 A1 WO2007010873 A1 WO 2007010873A1 JP 2006314101 W JP2006314101 W JP 2006314101W WO 2007010873 A1 WO2007010873 A1 WO 2007010873A1
Authority
WO
WIPO (PCT)
Prior art keywords
discharge
controller
electrodes
current
dry
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2006/314101
Other languages
English (en)
Japanese (ja)
Inventor
Shosuke Akisada
Kenji Obata
Sumio Wada
Tatsuhiko Matsumoto
Toshihisa Hirai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HIRAI KISHIKO
Panasonic Electric Works Co Ltd
Original Assignee
HIRAI KISHIKO
Matsushita Electric Works Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HIRAI KISHIKO, Matsushita Electric Works Ltd filed Critical HIRAI KISHIKO
Publication of WO2007010873A1 publication Critical patent/WO2007010873A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/057—Arrangements for discharging liquids or other fluent material without using a gun or nozzle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/08—Plant for applying liquids or other fluent materials to objects
    • B05B5/10—Arrangements for supplying power, e.g. charging power
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/053—Arrangements for supplying power, e.g. charging power
    • B05B5/0533—Electrodes specially adapted therefor; Arrangements of electrodes

Definitions

  • the present invention relates generally to an electrostatic atomizer, and more particularly to an electrostatic atomizer that generates a mist of charged fine particles having a size of nanometer order.
  • An electrostatic atomizer of this kind can be found, for example, in the patent literature of Japanese Patent No. 3260150 (European Patent Publication No. 0 486 198 A1 or US Pat. No. 5,337,963).
  • the prior art device described in this document comprises a liquid storage cartridge suitable for electrostatic spraying and high voltage means for applying an electrostatic potential to the liquid.
  • the cartridge includes a capillary structure that extends into the cartridge to supply liquid from the cartridge to the spray output tube at the tip of the capillary structure by capillary action.
  • the cartridge also includes means for providing a conductive path that allows charging of the liquid.
  • the high voltage means applies the potential to the liquid at the mouth of the spray output tube, a potential gradient is developed between the innermost and outer peripheral surfaces of the mouth, and the liquid flows across the end surface of the spray output tube toward the outermost surface. Pump out. As a result, the liquid is electrostatically ejected into a plurality of ligaments arranged so as to form a halo around the round.
  • the atomizer includes a discharge electrode, a counter electrode disposed opposite to the discharge electrode, a cooling source that cools the discharge electrode to form dew as water thereon, and a discharge electrode between the electrodes.
  • a high-voltage power supply for applying a high voltage In this way, by cooling the discharge electrode to form dew, it is possible to save the trouble of supplying water.
  • the atomizer repeats Rayleigh splitting to realize electrostatic atomization. That is, when a high voltage is applied between the electrodes, negative charges are concentrated on the discharge electrode, and the water held at the tip of the discharge electrode rises like a cone to form a tiller cone. Negative charge is te When concentrated at the tip of the cone, the repulsive force of the high-density electric charge causes Rayleigh splitting, splitting and scattering the water of the tiller cone.
  • a high voltage is applied between the electrodes so that a discharge is generated under the condition that an appropriate amount of dew is formed on the discharge electrode. It is important to apply.
  • an object of the present invention is to prevent the continuous generation of dry discharge in addition to saving the labor of replenishing water.
  • the electrostatic atomizer of the present invention includes a discharge electrode, a counter electrode, a cooling source, a high-voltage power supply, a current detector, and a controller.
  • the counter electrode is disposed to face the discharge electrode.
  • the cooling source cools the discharge electrode and forms dew as water thereon.
  • the power source applies a high voltage for discharge between the electrodes.
  • the detector detects a current flowing between the electrodes.
  • the controller determines whether or not the discharge between the electrodes is a dry discharge based on the current detected by the detector when the power supply applies a high voltage between the electrodes.
  • the dry discharge is a discharge when the amount of dew on the discharge electrode is less than a specified amount.
  • the controller temporarily increases the cooling rate of the cooling source.
  • the controller temporarily increases the cooling rate of the cooling source.
  • the controller monitors a time when the current detected by the detector exceeds a threshold current, and when the time exceeds the threshold time, the discharge between the electrodes is the dry discharge. Is determined.
  • This configuration is advantageous in that the detection accuracy of dry discharge can be increased.
  • the controller may stop the cooling source and the power source for a predetermined time, and then start the cooling source to temporarily increase the cooling rate.
  • the large amount of dew can be reduced. Therefore, even when a large amount of dew is formed on the discharge electrode not only in the case of dry discharge, it can be quickly returned to normal discharge.
  • the controller may increase the cooling rate stepwise. According to this configuration, it is possible to prevent a large amount of dew from being formed on the discharge electrode.
  • the controller may increase the cooling rate to a maximum cooling rate. According to this configuration, it is possible to quickly return to normal discharge.
  • the controller may step down the cooling rate and then stop the cooling source. In this case, stress on the cooling source can be reduced.
  • FIG. 1 is a schematic diagram of an embodiment according to the present invention.
  • FIG. 2 is an operation flow diagram of the embodiment.
  • FIG. 3 is an explanatory diagram of discharge current control in the enhanced embodiment of FIG.
  • FIG. 6 is an explanatory diagram of control for preventing ozone generation.
  • FIG. 7 is an operation flowchart of another modified embodiment.
  • FIG. 8 illustrates a Peltier module stop operation according to an alternative embodiment of FIG.
  • FIG. 1 illustrates one embodiment (ie, an electrostatic atomizer) according to the present invention.
  • the electrostatic atomizer includes a discharge electrode 1, a counter electrode 2, a cooling source 3, a high voltage power supply 4, a DC power supply 5, and a controller 6.
  • the discharge electrode 1 has, for example, a tip 11 having a teardrop shape, and receives a negative or positive high voltage (for example, ⁇ 4.6 kV) from the high-voltage power supply 4 during discharge.
  • the counter electrode 2 is formed in, for example, a ring shape whose inner peripheral edge functions as a substantial electrode, and a predetermined distance from the tip 11 of the electrode 1 Oppositely arranged at a distance.
  • the electrode 2 is connected to the ground.
  • the cooling source 3 includes, for example, a Peltier module 30 and heat radiating fins 31, and cools the discharge electrode 1 to a temperature equal to or lower than the dew point temperature of the surrounding air to form dew as water thereon.
  • the base of electrode 1 is connected to the cold side of module 30 and fin 31 is connected to the hot side of module 30.
  • the high-voltage power source 4 includes, for example, a high-voltage generator 40, a voltage detector 41, and a current detector 42.
  • the generator 40 generates a high voltage for discharge according to the ON control signal from the controller 6 and applies it between the electrodes 1 and 2, and stops generating the high voltage according to the OFF control signal from the controller 6. To do.
  • the detector 41 detects a voltage (discharge voltage) applied between the electrodes 1 and 2, and outputs a detection voltage signal (voltage Vv) to the controller 6 (AD input).
  • the detector 42 detects a current (discharge current) flowing between the electrodes 1 and 2, and outputs a detection current signal (voltage Vi) to the controller 6 (AD input).
  • the DC power supply 5 is constituted by, for example, a DCZDC converter 50 and applies a voltage adjusted according to a duty control signal from the controller 6 to the Peltier module 30.
  • the power supply 5 supplies a voltage (V +) to the high-voltage power supply 4.
  • the controller 6 includes, for example, a microcomputer (microcomputer), a storage device, an AZD converter, and the like. Based on the voltage and current from the detectors 41 and 42, the output of the high-voltage power source 4 and the DC power source 5 Control the output of. Both power supplies are controlled in the start-up mode (S10-S11 in FIG. 2), normal discharge determination mode (S20-S21), discharge current control mode (S30), dry discharge restriction mode (S40-S49), and the like.
  • a microcomputer microcomputer
  • S20-S21 normal discharge determination mode
  • S30 discharge current control mode
  • S40-S49 dry discharge restriction mode
  • the controller 6 In the start-up mode (during start-up), since the discharge electrode 1 is not cooled and dew is not formed on the electrode 1, the controller 6 outputs the output voltage of the DC power source 5 (converter 50). An initial duty control signal is output to the power source 5 for a predetermined time so that the predetermined initial voltage is reached, thereby adjusting the cooling rate of the Peltier module 30 to the initial cooling rate and Form dew.
  • the predetermined time is set to a time of 1 minute or longer (for example, several minutes).
  • the controller 6 After the predetermined time has elapsed, the controller 6 operates in a normal discharge determination mode.
  • the controller 6 is configured such that the high voltage power source 4 (high voltage generator 40) Output ON control signal to power supply 4 to apply between 1 and 2.
  • the controller 6 determines whether or not the discharge between the electrodes 1 and 2 is a normal discharge based on the value of the current detected by the current detector 42. If the discharge between the electrodes 1 and 2 is a normal discharge, the controller 6 operates in a discharge current control mode of feedback control, and if not, the controller 6 operates in a dry discharge restriction mode. Details of the normal discharge determination will be described later.
  • the controller 6 In the discharge current control mode, the controller 6 outputs an ON control signal to the power supply 4 so that the high-voltage power supply 4 generates a high voltage and applies it between the electrodes 1 and 2, and at the same time, LA 6 outputs a duty control signal to the power source 5 so as to adjust the cooling rate of the Peltier module 30 by adjusting the output voltage of the DC power source 5 based on at least the current detected by the current detector 42. .
  • the controller 6 outputs an ON control signal to the power supply 4 so that the high-voltage power supply 4 generates a high voltage and applies it between the electrodes 1 and 2, and at the same time, LA 6 outputs a duty control signal to the power source 5 so as to adjust the cooling rate of the Peltier module 30 by adjusting the output voltage of the DC power source 5 based on at least the current detected by the current detector 42.
  • the controller 6 outputs an ON control signal to the power supply 4 so that the high-voltage power supply 4 generates a high voltage and applies it between the electrodes 1 and 2,
  • the amount of dew formed on the discharge electrode 1 In order to stably generate mist, it is necessary to adjust the amount of dew formed on the discharge electrode 1 to an appropriate amount (a prescribed amount within a prescribed range) determined at the design stage. If the amount of dew on the electrode 1 is far below the specified amount, the discharge will occur between the electrodes 1 and 2 but not between the water and the counter electrode 2, leading to the generation of ozone. Conversely, if the amount of dew on electrode 1 is much greater than the specified amount, a short circuit current will flow between water and counter electrode 2 and it will not be possible to generate mist of charged particles of the desired size. . Therefore, in the discharge current control mode, the relationship between the current (discharge current) detected by the current detector 42 and the length of the tailor cone is used.
  • the controller 6 increases the output voltage of the DC power source 5 to increase the cooling rate of the Peltier module 30. Duty system Output control signal to power supply 5. Conversely, if the value of the current detected by the detector 42 is greater than the value of the reference current, the controller 6 supplies the duty control signal to the power supply 5 so as to lower the cooling rate by reducing the output voltage of the power supply 5. Output to 5.
  • the controller 6 determines whether or not the discharge between the electrodes 1 and 2 is a normal discharge based on the current value detected by the current detector 42, the controller 6 Use a larger threshold Imax. That is, if the current value detected by the detector 42 is smaller than a predetermined threshold value Imax, the controller 6 forms a dew on the discharge electrode 1 with a specified amount of discharge force between the electrodes 1 and 2. It is determined that the discharge is normal when it is discharged, and operates in the discharge current control mode. In this case, deterioration and wear of the electrode 1 can be prevented.
  • the value of the current detected by the detector 42 may be smaller than the threshold value Imax. Since the current flowing between 1 and 2 is not large, the problem of electrode 1 deterioration and wear does not occur.
  • the controller 6 determines that the discharge between the electrodes 1 and 2 is not normal discharge, and in the dry discharge restriction mode. Operate. That is, the controller 6 shuts off the power sources 4 and 5 for a predetermined dehumidification time to reduce, for example, a large amount of dew formed on the discharge electrode 1 to almost zero, for example due to high ambient humidity. . Subsequently, the controller 6 temporarily outputs an ON control signal to the power source 4 so that the high voltage power source 4 generates a high voltage and applies it between the electrodes 1 and 2, and is detected by the current detector 42. Based on the current value, it is determined whether or not the discharge power between electrodes 1 and 2 is a dry discharge when the amount of dew on electrode 1 is less than the specified amount.
  • the controller 6 discharges between the electrodes 1 and 2 if the value Idd of the current detected by the current detector 42 is equal to or slightly smaller than the threshold value Idd. Is determined to be dry discharge, and control is performed to regulate dry discharge. That is, the controller 6 stops the high-voltage power supply 4 and raises the cooling rate of the Peltier module 30 to the maximum cooling rate and holds the state for a predetermined maximum cooling duration. Thereby, dew is formed on the discharge electrode 1 in a short time. Subsequently, the controller 6 temporarily outputs an ON control signal to the power supply 4 so that the power supply 4 generates a high voltage and applies it between the electrodes 1 and 2.
  • the controller 6 determines that the discharge between the electrodes 1 and 2 is a normal discharge and operates in the discharge current control mode. Conversely, if the value of the current detected by the detector 42 is equal to or greater than the threshold value Idd, the controller 6 indicates that the discharge between the electrodes 1 and 2 is a dry discharge, and the force also forms an ambient environmental force. It is determined that the temperature and humidity are above the cooling capacity of the module 30, and power supplies 4 and 5 are turned off. Note that the controller 6 may be restarted in the startup mode after a predetermined time has elapsed.
  • the controller 6 determines that the discharge between the electrodes 1 and 2 has become a normal discharge, and controls the discharge current. Operate in mode.
  • the Peltier module 30 operates at the initial cooling rate for a predetermined time (SIO—Sl). After a predetermined time has elapsed, the controller 6 operates in the normal discharge determination mode, and the high voltage power source 4 generates a high voltage and applies it between the electrodes 1 and 2 (S20). Subsequently, the controller 6 determines whether or not the discharge between the electrodes 1 and 2 is a normal discharge based on the current value (I) detected by the current detector 42 (S21). If the discharge between the electrodes 1 and 2 is normal discharge (KImax), the controller 6 operates in the discharge current control mode (S30). Otherwise (I ⁇ Ima X ), the controller 6 operates in dry discharge regulation mode
  • the controller 6 stops the power sources 4 and 5 during the dehumidifying time (S40-S41). Subsequently, the high-voltage power supply 4 generates a high voltage and applies it between the electrodes 1 and 2 (S42), and the controller 6 determines whether the voltage between the electrodes 1 and 2 is based on the current value detected by the current detector 42. It is determined whether or not the power is a dry discharge (S43). If the discharge force between the electrodes 1 and 2 is not S dry discharge (KIdd), the controller 6 operates in the discharge current control mode (S30).
  • the controller 6 stops the power supply 4 (S44), increases the cooling rate of the Peltier module 30 to the maximum cooling rate (S4 5), This state is maintained for the maximum cooling duration (S46). Subsequently, the controller 6 determines whether or not the dry discharge is eliminated (S47-S48). If dry discharge is eliminated (KIdd), the controller 6 operates in the discharge current control mode (S30). Otherwise (1 ⁇ 1 dd), the controller 6 stops the power supplies 4 and 5 (S49).
  • the controller 6 adjusts the output voltage of the DC power supply 5 based on the voltage detected by the voltage detector 41 and the current detected by the current detector 42.
  • a duty control signal is output to the power source 5 so that the cooling rate of the Peltier module 30 is adjusted.
  • the discharge voltage (V (m)) is selected in advance from a plurality of voltage ranges shown in Table 1 by the user.
  • the controller 6 outputs the duty control signal to the power source 5 so that the current detected by the detector 42 becomes a median value corresponding to the voltage detected by the detector 41.
  • the controller 6 sets the cooling rate of the Peltier module 30 to the median value based on the voltage detected by the voltage detector 41 and the current detected by the current detector 42.
  • a duty control signal is output to the DC power supply 5 so as to make it asymptotically approach the cooling rate corresponding to.
  • the controller The troller 6 averages the voltage and current detected by the detectors 41 and 42 for each specified period At.
  • Tl and t2 duty (D (2), t2 and t3 duty (D (3) D (2) + AD (2).
  • Pa and Pb are parameters, D (2), D (3), etc. correspond to any of D1-D256 obtained by dividing 0—100% duty into 256.
  • a correction function F ⁇ D (m-1) ⁇ corresponding to the value of the previous increment ⁇ D (ml) is used, that is, (Pa XA ld (m)-Pb X ⁇ I (m) XF ⁇ D (m-1) ⁇ may be used to calculate the increment AD (m), and the function F ⁇ D (m) ⁇
  • m-1) is low, it has a small value, and when D (ml) is high, it has a large value, which makes it possible to weight the entire duty.
  • the voltage to the Peltier module 30 Since the cooling temperature ⁇ ⁇ of the discharge electrode 1 is also low, dew is likely to be formed on it, so by setting the value of the correction function to 0.5, for example, excessive dew is formed.
  • the value of the correction function is set to 2, for example, to increase the rate of change.
  • ⁇ ⁇ is 5 ° C when the room temperature is 25 ° C and dew point is 20 ° C
  • ⁇ is when the room temperature is 25 ° C and dew point is 10 ° C. Is 15 ° C.
  • the controller 6 determines whether the discharge between the electrodes 1 and 2 is a dry discharge based on the current detected by the current detector 42 even in the discharge current control mode. If the discharge is a dry discharge, the dry discharge regulation mode is determined. It operates under the same control as the control (S40-S49). Specifically, in the case of normal discharge, the discharge current flowing between electrodes 1 and 2 falls within a range approximately twice the discharge current (for example, 8 / z A) corresponding to the default discharge voltage, for example. . Therefore, the controller 6 determines that the discharge between the electrodes 1 and 2 is dry discharge when the current detected by the detector 42 exceeds the upper limit of the range.
  • Dry discharge also occurs during continuous operation under the discharge current control mode.
  • Peltier module 30 failure, DC power supply 5 failure, dust adhering to discharge electrode 1 or surrounding environment (especially temperature and humidity) Occurs when dew does not form on discharge electrode 1 due to factors such as changes in In the electrostatic atomizer shown in Fig. 1, when dry discharge occurs during the discharge current control mode, the amount of dew is reduced according to the large discharge current due to the dry discharge, so the dry discharge cannot be returned to normal discharge. .
  • the dry discharge is returned to the normal discharge by determining whether or not the discharge between the electrodes 1 and 2 is a dry discharge based on the current detected by the detector 42. Can do.
  • controller 6 determines that the discharge between electrodes 1 and 2 is a dry discharge. A distinction is made between whether there is overdischarge due to overshoot or not.
  • the discharge current control mode as shown in FIG. 4, the force overshoot that is adjusted to Imid within the range of the current I force Imax and Imin detected by the detector 42 is, for example, the discharge current control mode. It may occur in the initial stage, etc., and may exceed the current I force threshold Imax. In such a case, if the control in the discharge current control mode is continued, the current I falls within the above range.
  • FIG. 4 the discharge current control mode
  • the controller 6 measures the time exceeding the current I force S threshold Imax. If the time is longer than the threshold time Ta for determining dry discharge and overdischarge, the controller 6 determines that the discharge between the electrodes 1 and 2 is dry discharge, and the control is the same as in the dry discharge restriction mode control. Operates with control.
  • the threshold time Ta is set to a time shorter than the time B in FIG. 5 that is longer than the time A in FIG. For example, if the A time is set to 30 seconds or less, the threshold time Ta is set to about 1 minute.
  • the controller 6 is configured to prevent the current I 1S detected by the detector 42 from exceeding the threshold value Ith larger than the threshold value Imax for preventing ozone generation. Measure.
  • the controller 6 stops the high piezoelectric source 4 for a predetermined stop time for preventing ozone generation.
  • the threshold time Tb is set to a time shorter than the threshold time Ta, for example. In this case, this embodiment can be combined with the embodiments of FIGS. 4 and 5, and the stop time is set based on the threshold value Ith, the threshold time Ta, and the threshold time Tb.
  • the threshold time Ta and the threshold time Tb are long, the amount of dew is reduced. Therefore, in the case of dry discharge, the time for reducing the amount of dew can be shortened. Is set. If the threshold time Ta and the threshold time Tb are short, the amount of dew may be high, so the pause time is set to a few minutes.
  • the controller 6 operates in the normal discharge determination mode after the start-up mode (not shown) and determines whether or not it has the power to shift to the discharge current control mode. Determine (S120). If the mode does not enter the discharge current control mode (NO at SI 20), the power sources 4 and 5 are suspended for a predetermined time (S121), and the process returns to step S120. When shifting to the discharge current control mode (YES in S120), the controller 6 operates in the discharge current control mode (S1 30) .For example, the current detected by the current detector 42 is output at predetermined intervals such as by interruption. It is determined whether or not the threshold value is equal to or greater than Imax (S100).
  • the process returns to step S130. If the current is equal to or greater than the threshold value Imax, the controller 6 operates in the dry discharge restriction mode. That is, the controller 6 stops the power supplies 4 and 5 during the dehumidifying time (S140-S141). Subsequently, the controller 6 increases the cooling rate of the Peltier module 30 to the maximum cooling rate with a rising rate faster than the normal control (see the broken line), and at the same time, supplies the electrode via the high-voltage power source 4 every ⁇ . A high voltage is generated between 1 and 2, and based on the current I detected by the detector 42 within a predetermined elapsed time or a predetermined number of determinations, It is determined whether the live discharge has been eliminated (S 142).
  • the process returns to step S130. If the dry discharge is not eliminated by the predetermined elapsed time or the predetermined number of determinations (I ⁇ Idd), the power supplies 4 and 5 are suspended for the predetermined time (S143), and the operation returns to the start mode.
  • the rising rate is adjusted in an environment where dew is likely to form (about 40 ° C, 90% RH). In this environment, for example, when a maximum voltage is applied to the Peltier module 30, dew is formed: If the A discharge current takes 15 seconds to flow between electrodes 1 and 2, then the rising rate is The starting power of is set to reach the maximum cooling rate after about 60 seconds.
  • step S143 is set based on the environment where dew formation is difficult (about 40 ° C, 15% RH). That is, if maximum voltage is applied to module 30 and dew is formed and it takes about 3 minutes to allow 1 A discharge current to flow between electrodes 1 and 2, the time for S143 is about 3 minutes. Is set.
  • the high-voltage power supply 4 high-voltage generator 40
  • the module 30 is turned off in consideration of the excessive amount of dew, but the dry discharge If the occurrence is obvious, you can keep module 30 on! /.
  • the controller 6 when the controller 6 turns off the Peltier module 30, for example in steps S40, S49, S121, S140 or S143, the controller 6 Decrease the cooling rate in steps (eg about every 3 seconds ⁇ ) and then shut down module 30. According to this embodiment, since the stress on the module 30 can be reduced, its life can be extended.
  • the controller 6 further considers the voltage of the Peltier module 30 when the controller 6 determines whether a dry discharge has occurred. If the controller 6 operates in the discharge current control mode in the case of dry discharge, the current detected by the current detector 42 shows fluctuation, and the module 30 shows voltage fluctuation according to the fluctuation of the current. Therefore, if the width of the voltage fluctuation is, for example, about 0.3 V, the module 3 If the actual voltage of 0 continues below 0.3V, it can be determined that a dry discharge has occurred.

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  • Electrostatic Spraying Apparatus (AREA)

Abstract

Pulvérisateur électrostatique comportant une électrode de décharge, une contreélectrode, une source de refroidissement, une alimentation en énergie haute tension, un détecteur de courant, et une commande. La source de refroidissement refroidit l'électrode de décharge en y déposant une rosée d’eau. L’alimentation en énergie applique une haute tension de décharge entre les électrodes. Le détecteur détecte un courant circulant entre les électrodes. La commande décide si une décharge entre les électrodes est une décharge sèche ou non, en fonction du courant détecté par le détecteur lorsque l'alimentation en énergie applique une haute tension entre les électrodes. La décharge sèche est une décharge se produisant lorsque la quantité de rosée sur l’électrode de décharge est inférieure à une quantité spécifiée. Lorsqu’une décharge entre les électrodes est une décharge sèche, la commande augmente temporairement le taux de refroidissement de la source de refroidissement.
PCT/JP2006/314101 2005-07-15 2006-07-14 Pulvérisateur électrostatique Ceased WO2007010873A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005207583A JP4396591B2 (ja) 2005-07-15 2005-07-15 静電霧化装置
JP2005-207583 2005-07-15

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WO2007010873A1 true WO2007010873A1 (fr) 2007-01-25

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007021374A (ja) * 2005-07-15 2007-02-01 Matsushita Electric Works Ltd 静電霧化装置
WO2009136470A1 (fr) * 2008-04-18 2009-11-12 Panasonic Electric Works Co., Ltd. Dispositif d'atomisation électrostatique
JP2010064055A (ja) * 2008-09-12 2010-03-25 Panasonic Electric Works Co Ltd 静電霧化装置
CN102427888A (zh) * 2009-03-19 2012-04-25 杜尔系统有限责任公司 静电雾化器的电极组件
EP2226127A4 (fr) * 2007-12-25 2013-11-06 Panasonic Corp Appareil de génération de particules fines d'oxydation et de réduction

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JP5149095B2 (ja) * 2008-07-28 2013-02-20 パナソニック株式会社 静電霧化装置およびそれを用いる空気調和機
JP5265997B2 (ja) * 2008-09-12 2013-08-14 パナソニック株式会社 静電霧化装置
CN102582293B (zh) * 2012-02-29 2014-07-23 厦门大学 电纺直写闭环控制系统及控制方法

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JP3260150B2 (ja) * 1990-11-12 2002-02-25 ザ プラクター アンド ギャムブル カンパニー カートリッジおよび静電噴霧装置
JP2005131549A (ja) * 2003-10-30 2005-05-26 Matsushita Electric Works Ltd 静電霧化装置

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CN102427888B (zh) * 2009-03-19 2015-06-17 杜尔系统有限责任公司 静电雾化器的电极组件
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