JP2007042312A - Ion generating device and electric apparatus having this - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ion generating device in which the number of times of electric discharge per unit time is changeable and required cost and space are reduced. <P>SOLUTION: The ion generating device comprises electric discharge portions 8 and 9 and a voltage applying circuit for applying a predetermined voltage converted from an ac voltage supplied from an ac power supply 1 to the electric discharge portions 8 and 9. The voltage applying circuit includes a SSR 15, a microcomputer 13 controlling the SSR 15, and CR circuit (a resistor 2 and a capacitor 4) having a fixed time constant and applies the predetermined voltage to the electric discharge portions 8 and 9 every electric discharge of the CR circuit, in which the CR circuit receives the voltage only when the SSR 15 is in an on state. The microcomputer 13 detects the zero-cross of the ac voltage and controls the SSR 15 into the on state only when the phase of the ac voltage is in a predetermined range. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an ion generator capable of decomposing bacteria, fungi, harmful substances, etc. floating in the air by releasing positive ions and negative ions into the space, and an electric device equipped with the same. is there. In addition, as an example applicable to the above-mentioned electrical equipment, it is mainly a closed space (inside a house, one room in a building, a hospital room or operating room, a car, an airplane, a ship, a warehouse, a refrigerator, etc.) Examples thereof include air conditioners, dehumidifiers, humidifiers, air purifiers, refrigerators, fan heaters, microwave ovens, washing / drying machines, vacuum cleaners, and sterilizers that release positive ions and negative ions.

Positive ions and negative ions are released, and positive ions H ⁺ (H ₂ O) _m and negative ions O ₂ ⁻ (H ₂ O) _n (m and n are By generating approximately the same amount of natural number), both ions surround the airborne fungi and viruses in the air, and the action of the active species hydroxyl radical (.OH) generated at that time causes the airborne fungi A patent application has already been filed by the applicant of the present invention for an ion generator that can sterilize and inactivate, etc.

The above-mentioned invention has already been put into practical use by the applicant of the present application, and the practical machine includes an ion generator having a structure in which a discharge electrode is disposed outside and a induction electrode is disposed on the inside with a ceramic dielectric interposed therebetween, and this There are air cleaners and air conditioners equipped with.
JP 2003-47651 A JP 2002-319472 A JP 2004-363088 A

  If the amount of ions generated from the ion generator is large, it is possible to enhance the effect of sterilizing / inactivating the above-mentioned floating mold bacteria. In order to increase the amount of generated ions, the number of discharges per unit time may be increased. However, if the number of discharges per unit time is increased, the discharge noise will increase and the amount of ozone generated will increase. Therefore, the number of discharges per unit time will not always be increased. When it is not necessary to increase the effect of sterilizing / inactivating the liquid, it is desirable that the number of discharges per unit time can be switched so that the number of discharges per unit time can be reduced.

  However, in the ion generators disclosed in Patent Documents 2 and 3, since the time constant of the CR circuit arranged in the primary circuit of the step-up transformer is fixed, the number of discharges per unit time is fixed. Therefore, the number of discharges per unit time cannot be switched.

  When the time constant of the CR circuit arranged in the primary circuit of the step-up transformer is changed, the number of discharges per unit time is also changed. As an ion generator capable of changing the number of discharges per unit time, for example, FIG. 7 or the ion generator shown in FIG. 8 can be easily conceived.

  The ion generator shown in FIG. 7 includes an ion generating element including a first discharge unit 8 and a second discharge unit 9, and a voltage application circuit that applies a predetermined voltage to the ion generating element. The voltage application circuit is a circuit that converts an AC voltage output from the AC commercial power source 1 into a predetermined voltage, and includes an input resistor 2, a full-wave rectifier circuit 3, a capacitor 4, a diode 5, and a transformer drive. Switching element (gate-free two-terminal thyristor: Sidac [Shindengen product name]) 6, a step-up transformer 7, diodes 10 and 11, a relay comprising a relay contact RY0b and a relay coil RY0a, and a microcomputer 13 And a diode D1, a resistor R1, and a relay composed of a relay contact RY1b and a relay coil RY1a.

  The ion generator shown in FIG. 8 includes an ion generating element including a first discharge unit 8 and a second discharge unit 9, and a voltage application circuit that applies a predetermined voltage to the ion generating element. The voltage application circuit is a circuit that converts an AC voltage output from the AC commercial power source 1 into a predetermined voltage, and includes an input resistor 2, a full-wave rectifier circuit 3, a capacitor 4, a diode 5, and a transformer drive. Switching element (gate-free two-terminal thyristor: Sidac [Shindengen product name]) 6, a step-up transformer 7, diodes 10 and 11, a relay comprising a relay contact RY0b and a relay coil RY0a, and a microcomputer 13 And a diode D1, a resistor R1, a first relay composed of a relay contact RY1b and a relay coil RY1a, a resistor R2, and a second relay composed of a relay contact RY2b and a relay coil RY2a.

  The ion generator shown in FIG. 7 has a configuration in which the number of discharges per unit time is switched in two stages by switching on / off of a relay composed of a relay contact RY1b and a relay coil RY1a. Further, the ion generator shown in FIG. 8 switches on / off the first relay composed of the relay contact RY1b and the relay coil RY1a and the second relay composed of the relay contact RY2b and the relay coil RY2a (however, the first relay and This is a configuration in which the number of discharges per unit time is switched in three stages except when both the second relays are turned on. When the case where both the first relay and the second relay are turned on is added, a configuration in which the number of discharges per unit time is switched in four stages is also possible. When the resistance value of the resistor constituting the CR circuit is increased, the number of discharges per unit time is reduced. Conversely, when the resistance value of the resistor constituting the CR circuit is reduced, the number of discharges per unit time increases.

  However, in the configuration in which the time constant of the CR circuit arranged in the primary circuit of the step-up transformer as shown in FIG. 7 or FIG. 8 is changed by switching on / off of the relay, the number of switching stages of the number of discharges per unit time is As the number increases, the number of parts increases, which makes it impossible to reduce the cost and space of the circuit board. In addition, since the number of discharges per unit time is switched by the resistance value of the resistor constituting the CR circuit arranged in the primary circuit of the step-up transformer, the CR circuit is used to change the setting of the number of discharges per unit time. It was necessary to replace the resistors constituting the circuit.

  In view of the above problems, the present invention provides an ion generator capable of switching the number of discharges per unit time and capable of reducing cost and space, and an electric apparatus equipped with the ion generator. With the goal.

  In order to achieve the above object, an ion generator according to the present invention includes at least one discharge unit and a voltage application circuit that converts an AC voltage supplied from an AC power source and applies a predetermined voltage to the discharge unit. The voltage application circuit includes a switching element, a control unit that controls the switching element, and a charging / discharging circuit having a fixed time constant, and discharging the charging / discharging circuit. Each time a predetermined voltage is applied to the discharge unit, a voltage is supplied to the charge / discharge circuit when the switching element is on, and no voltage is supplied to the charge / discharge circuit when the switching element is off In the circuit, the control unit detects a zero cross of the AC voltage, turns on the switching element when the phase of the AC voltage is within a predetermined range, Phase so that to turn off the switching element when other than the predetermined range.

  According to such a configuration, the number of discharges per unit time can be switched by changing the predetermined range. In addition, since the number of discharges per unit time can be switched by changing the control contents of the control unit in software, the time constant of the CR circuit arranged in the primary circuit of the step-up transformer is set to the relay. Compared with the ion generator shown in FIG. 7 or FIG. 8 which is changed by on / off switching, cost reduction and space saving can be achieved.

  Further, the control unit detects a zero cross of the AC voltage, turns on the switching element when the phase of the AC voltage is within a predetermined range, and when the phase of the AC voltage is outside the predetermined range, You may make it switch between the 1st control mode which turns off a switching element, and the 2nd control mode which hold | maintains the said switching element in an ON state.

  According to such a configuration, the number of discharges per unit time can be switched also by switching between the first control mode and the second control mode.

  In addition, the first control mode has two control modes (for example, a control mode in which the voltage waveform shown in FIG. 3 is obtained and a control mode in which the voltage waveform shown in FIG. 4 is obtained). The control unit may further select one mode from the plurality of control modes when the first control mode is selected by mode switching.

  According to such a configuration, the number of discharges per unit time can be switched in three or more stages.

  In addition, an electric apparatus according to the present invention includes an ion generator having any one of the above-described configurations and a sending unit (for example, a blower fan) that sends ions generated by the ion generator into the air. With such a configuration, in addition to the original function of the device, it is possible to change the amount of ions in the air and the ion balance with the installed ion generator, and to bring the environment such as the room into a desired atmosphere state.

  ADVANTAGE OF THE INVENTION According to this invention, the ion generator which can switch the frequency | count of discharge per unit time, and can aim at cost reduction and space saving, and an electric equipment provided with the same are realizable.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an electrical configuration example of an ion generator according to the present invention.

  The ion generator shown in FIG. 1 includes an ion generating element including a first discharge unit 8 and a second discharge unit 9, and a voltage application circuit that applies a predetermined voltage to the ion generating element. The voltage application circuit is a circuit that converts an AC voltage output from the AC commercial power source 1 into a predetermined voltage, and includes an input resistor 2, a full-wave rectifier circuit 3, a capacitor 4, a diode 5, and a transformer drive. Switching element (gateless two-terminal thyristor: Sidac [Shindengen product name]) 6, a step-up transformer 7, diodes 10 and 11, a relay comprising a relay contact RY0b and a relay coil RY0a, and a power supply clock circuit 12, a microcomputer 13, a resistor 14, and an SSR 15. The secondary windings 7b and 7c of the step-up transformer 7 have substantially the same characteristics as each other including the number of turns. The power supply clock circuit 12 receives the AC voltage output from the AC commercial power supply 1 and generates the power supply clock signal S0 that rises at the rising zero-cross timing of the input AC voltage and falls at the falling zero-cross timing of the input AC voltage. Then, the power supply clock signal S 0 is supplied to the microcomputer 13. The microcomputer 13 sets the signal S1 to a fixed high level or a signal synchronized with the rising edge of the power supply clock signal S0.

  First, the operation of the primary circuit of the step-up transformer 7 when the SSR 15 is fixedly turned on will be described with reference to FIGS. FIG. 2 is a diagram showing voltage waveforms of respective parts of the ion generator shown in FIG. 1 when the frequency of the AC voltage output from the AC commercial power supply 1 is 60 Hz and the SSR 15 is fixedly turned on.

  When the SSR 15 is fixedly turned on, the microcomputer 13 fixes the signal S1 supplied to the primary side 15a of the SSR 15 through the resistor 14 to the high level.

The capacitor 4 is charged by the AC voltage output from the AC commercial power supply 1 through the input resistor 2, the full-wave rectifier circuit 3, the primary winding 7 a of the step-up transformer 7, and the secondary side 15 b of the SSR 15. When the voltage V2 across the transformer driving switching element 6 reaches the specified voltage _Vb0 , the transformer driving switching element 6 is turned on, and a current flows through the primary winding 7a of the step-up transformer 7. When a current flows through the primary winding 7a of the step-up transformer 7, the energy charged in the capacitor 4 is discharged, the voltage across the capacitor 4 returns to zero, the switching element 6 for driving the transformer is turned off, and the capacitor again 4 is charged, and charging and discharging are repeated at a specified period.

In the present embodiment, the resistance of the input resistor 2 is set so that the specified voltage V _b0 is 82.5 [V] and the capacitor 4 is repeatedly charged and discharged 600 times per second when the SSR 15 is fixedly turned on. Value and the capacitance value of the capacitor 4 are set. That is, when the frequency of the AC voltage V0 output from the AC commercial power supply 1 is 60 Hz, charging and discharging of the capacitor 4 is repeated 10 times in one cycle of the AC voltage V0 output from the AC commercial power supply 1. When the resistance value of the input resistor 2 and the capacitance value of the capacitor 4 are set and the frequency of the AC voltage V0 output from the AC commercial power supply 1 is 50 Hz, one cycle of the AC voltage V0 output from the AC commercial power supply 1 In addition, the resistance value of the input resistor 2 and the capacitance value of the capacitor 4 are set so that charging / discharging of the capacitor 4 is repeated 12 times.

  Next, an operation example of the primary side circuit of the step-up transformer 7 when the frequency of the AC voltage V0 output from the AC commercial power supply 1 is 60 Hz and the capacitor 4 is repeatedly charged and discharged 60 times per second is shown in FIG. This will be described with reference to FIG. FIG. 3 shows an example of the voltage waveform of each part of the ion generator shown in FIG. 1 when the frequency of the AC voltage output from the AC commercial power supply 1 is 60 Hz and the capacitor 4 is repeatedly charged and discharged 60 times per second. FIG.

  When the frequency of the AC voltage output from the AC commercial power supply 1 is 60 Hz and the capacitor 4 is repeatedly charged and discharged 60 times per second, the microcomputer 13 supplies a signal to the primary side 15a of the SSR 15 via the resistor 14 S1 is a signal in which a pulse having a pulse width W1 rises after T1 seconds have elapsed since the power supply clock signal S0 rises.

The signal S1 rises after a lapse of T1 seconds from the rise of the power supply clock signal S0, and the SSR 15 is turned on. When the SSR 15 is turned on, the AC voltage output from the AC commercial power supply 1 causes the capacitor 4 to pass through the input resistor 2, the full-wave rectifier circuit 3, the primary winding 7a of the step-up transformer 7, and the secondary side 15b of the SSR 15. Charged. When the voltage V2 across the transformer driving switching element 6 reaches the specified voltage _Vb0 , the transformer driving switching element 6 is turned on, and a current flows through the primary winding 7a of the step-up transformer 7. Thereafter, when the signal S1 falls, the SSR 15 is turned off.

  With such an operation, charging / discharging of the capacitor 4 is performed once in one cycle of the AC voltage V0 output from the AC commercial power supply 1, and therefore charging / discharging of the capacitor 4 is repeated 60 times per second.

  Next, an operation example of the primary side circuit of the step-up transformer 7 when the frequency of the AC voltage V0 output from the AC commercial power supply 1 is 60 Hz and the capacitor 4 is repeatedly charged and discharged 240 times per second is shown in FIG. This will be described with reference to FIG. 4 shows an example of the voltage waveform of each part of the ion generator shown in FIG. 1 when the frequency of the AC voltage output from the AC commercial power supply 1 is 60 Hz and the capacitor 4 is repeatedly charged and discharged 240 times per second. FIG.

  When the frequency of the AC voltage output from the AC commercial power supply 1 is 60 Hz and the capacitor 4 is repeatedly charged and discharged 240 times per second, the microcomputer 13 supplies a signal to the primary side 15a of the SSR 15 via the resistor 14 S1 is a signal in which a pulse having a pulse width W2 rises after T2 seconds and T3 seconds from the rise of the power supply clock signal S0.

The signal S1 rises after the elapse of T2 seconds from the rise of the power supply clock signal S0, and the SSR 15 is turned on. When the SSR 15 is turned on, the AC voltage output from the AC commercial power supply 1 causes the capacitor 4 to pass through the input resistor 2, the full-wave rectifier circuit 3, the primary winding 7a of the step-up transformer 7, and the secondary side 15b of the SSR 15. Charged. When the voltage V2 across the transformer driving switching element 6 reaches the specified voltage _Vb0 , the transformer driving switching element 6 is turned on, and a current flows through the primary winding 7a of the step-up transformer 7. When a current flows through the primary winding 7a of the step-up transformer 7, the energy charged in the capacitor 4 is discharged, the voltage across the capacitor 4 returns to zero, the switching element 6 for driving the transformer is turned off, and the capacitor again 4 is charged, and when the voltage V2 across the transformer driving switching element 6 reaches the specified voltage _Vb0 , the capacitor 4 is discharged again. The signal S1 falls almost simultaneously with the re-discharge of the capacitor 4 and the SSR 15 is turned off.

Thereafter, the signal S1 rises again after T3 seconds from the rise of the power supply clock signal S0, and the SSR 15 is turned on. When the SSR 15 is turned on, the AC voltage output from the AC commercial power supply 1 causes the capacitor 4 to pass through the input resistor 2, the full-wave rectifier circuit 3, the primary winding 7a of the step-up transformer 7, and the secondary side 15b of the SSR 15. Charged. When the voltage V2 across the transformer driving switching element 6 reaches the specified voltage _Vb0 , the transformer driving switching element 6 is turned on, and a current flows through the primary winding 7a of the step-up transformer 7. When a current flows through the primary winding 7a of the step-up transformer 7, the energy charged in the capacitor 4 is discharged, the voltage across the capacitor 4 returns to zero, the switching element 6 for driving the transformer is turned off, and the capacitor again 4 is charged, and when the voltage V2 across the transformer driving switching element 6 reaches the prescribed voltage _Vb0 , the capacitor 4 is discharged again. The signal S1 falls almost simultaneously with the re-discharge of the capacitor 4 and the SSR 15 is turned off.

  With such an operation, charging / discharging of the capacitor 4 is performed four times in one cycle of the AC voltage V0 output from the AC commercial power supply 1, and therefore charging / discharging of the capacitor 4 is repeated 240 times per second.

  Next, the operation of the primary side circuit of the step-up transformer 7 when the frequency of the AC voltage V0 output from the AC commercial power supply 1 is 50 Hz and charging / discharging of the capacitor 4 is repeated 60 times per second is shown in FIG. This will be described with reference to FIG. FIG. 5 shows an example of the voltage waveform of each part of the ion generator shown in FIG. 1 when the frequency of the AC voltage output from the AC commercial power supply 1 is 50 Hz and the capacitor 4 is repeatedly charged and discharged 58.3 times per second. FIG.

  When the frequency of the AC voltage output from the AC commercial power source 1 is 50 Hz and the capacitor 4 is repeatedly charged and discharged 58.3 times per second, the microcomputer 13 supplies the primary side 15 a of the SSR 15 via the resistor 14. The signal S1 to be used is a signal in which a pulse having a pulse width W3 rises after T4 seconds have elapsed since the power supply clock signal S0 rises.

The signal S1 rises after the elapse of T4 seconds from the rise of the power supply clock signal S0, and the SSR 15 is turned on. When the SSR 15 is turned on, the AC voltage output from the AC commercial power supply 1 causes the capacitor 4 to pass through the input resistor 2, the full-wave rectifier circuit 3, the primary winding 7a of the step-up transformer 7, and the secondary side 15b of the SSR 15. Charged. When the voltage V2 across the transformer driving switching element 6 reaches the specified voltage _Vb0 , the transformer driving switching element 6 is turned on, and a current flows through the primary winding 7a of the step-up transformer 7. Thereafter, when the signal S1 falls, the SSR 15 is turned off.

  By such an operation, charging / discharging of the capacitor 4 is performed 58.3 times per 50 cycles of the AC voltage V0 output from the AC commercial power supply 1, and therefore charging / discharging of the capacitor 4 is repeated 58.3 times per second. .

  As is clear from the above description, the ion generator shown in FIG. 1 only changes the waveform of the signal S1 output from the microcomputer 13, and the number of times the capacitor 4 is charged / discharged per unit time, as well as the first discharge unit described later. 8 and the number of discharges per unit time in the second discharge unit 9 can be changed. As described above, since the ion generator shown in FIG. 1 can change the number of discharges per unit time in software, the number of discharge stages per unit time can be increased or input without increasing the number of parts. The setting of the number of discharges per unit time can be changed without replacing the resistor 2.

  Further, the power supply clock circuit 12, the resistor 14, and the SSR 15 are smaller and less expensive than the diode D1, the relay, and the resistor included in the ion generator shown in FIG. 7 or FIG. Compared with the ion generator shown in FIG. 7 or FIG. 8, the ion generator can achieve cost reduction and space saving of the circuit board. This effect becomes more prominent as the number of switching stages of the number of discharges per unit time increases.

  Further, the number of discharges per unit time in the first discharge unit 8 and the second discharge unit 9 is, for example, 60 times / second when the frequency of the AC voltage output from the AC commercial power supply 1 is 60 Hz, and the constant of the CR circuit is When set, in the conventional ion generator, the number of discharges per unit time in the first discharge unit 8 and the second discharge unit 9 when the frequency of the AC voltage output from the AC commercial power supply 1 is 50 Hz is small, for example The target value was 57 times / second, and it was difficult to approach the target value even when the frequency of the AC voltage output from the AC commercial power supply 1 was 50 Hz or 60 times / second. On the other hand, in the ion generator shown in FIG. 1, when the frequency of the AC voltage output from the AC commercial power source 1 is 60 Hz and when the frequency of the AC voltage output from the AC commercial power source 1 is 50 Hz, By setting the signal S1 to (see FIGS. 3 and 5), the first discharge unit 8 and the second discharge unit can be used regardless of whether the frequency of the AC voltage output from the AC commercial power supply 1 is 60 Hz or 50 Hz. The number of discharges per unit time at 9 can be made to coincide with or approach the target value.

  Next, the secondary side circuit of the step-up transformer 7 will be described. The secondary winding 7 b of the step-up transformer 7 is connected to the first discharge electrode 8 a and the first induction electrode 8 b of the first discharge unit 8, and the secondary winding 7 c of the step-up transformer 7 is connected to the second discharge unit 9. The second discharge electrode 9a and the second induction electrode 9b are connected.

  When the transformer driving switching element 6 of the primary circuit is turned on, the energy on the primary side is transmitted to the secondary windings 7b and 7c of the step-up transformer 7, and the secondary windings 7b and 7c of the step-up transformer 7 are transmitted. Impulse alternating voltage is generated at both ends.

  In Japan, since one of the AC commercial power supplies is grounded, an electrical device without a ground terminal can be connected to one side of the AC commercial power supply 1 to obtain the same function. In addition, even if the power plug of the ion generator is inserted reversely into the outlet, only 100V is superimposed and the grounding is the same.

  Not only the secondary winding 7b of the step-up transformer 7 but also the cathode of the diode 10 is connected to the first discharge electrode 8a. Further, not only the secondary winding 9c of the step-up transformer 7 but also the anode of the diode 11 is connected to the second discharge electrode 9a.

  First, the case where the relay contact RY0b is on under the control of the microcomputer 13 will be described. Since the cathode of the diode 10 is connected to the first discharge electrode 8a of the first discharge section 8, the first discharge electrode 8a, the first The voltage of the induction electrode 8b is obtained by positively biasing an impulse-like alternating voltage generated in the secondary winding 7b, and the first discharge electrode 8a with reference to one side of the ground terminal, or in some cases, the AC commercial power supply 1, The potentials of the first induction electrode 8b are both positive, negative ions generated from the first discharge part 8 are neutralized on the first discharge electrode 8a, and positive ions are repelled and released. On the other hand, since the anode of the diode 11 is connected to the second discharge electrode 9a of the second discharge unit 9, the second discharge electrode 9a, which is based on one side of the ground terminal, or in some cases, the AC commercial power source 1, The voltage of the second induction electrode 9b is obtained by negatively biasing an impulse-like alternating voltage generated in the secondary winding 7c, and is a second discharge electrode with reference to one side of the ground terminal or, in some cases, the AC commercial power supply 1. 9a and the potential of the second induction electrode 9b are both negative, the positive ions generated from the second discharge part 9 are neutralized on the second discharge electrode 9a, and the negative ions are repelled and released.

  The first discharge electrode 8a and the second discharge electrode 9a have the same shape, and the first induction electrode 8b and the second induction electrode 9b have the same shape. Furthermore, the insulation resistance between the first discharge electrode 8a and the first induction electrode 9b and the insulation resistance between the second discharge electrode 8a and the second induction electrode 9b are substantially the same. With such a configuration, when the relay contact RY0b is on, the positive ions released from the first discharge part 8 and the negative ions released from the second discharge part 9 become approximately the same amount.

Here, the positive ions generated from the first discharge part 8 are H ⁺ (H ₂ O) _m , and the negative ions generated from the second discharge part 9 are O ₂ ⁻ (H ₂ O) _n (m and n are Any natural number).

Thus, ions emitted from the first discharge part 8 become positive ions, and ions emitted from the second discharge part 9 become negative ions. That is, both positive and negative ions are released individually. _{^{Then, H + (H 2 O)}} m and O ₂ in the air ^- by releasing both of (H ₂ O) _n, these ions surrounds around the floating mold bacteria and viruses in the air, in which It becomes possible to sterilize / inactivate the floating mold by the action of the hydroxyl radical (.OH) of the generated active species.

The above description will be described in detail. By applying an alternating voltage between the electrodes constituting the first discharge part 8 and the second discharge part 9, oxygen molecules or water molecules in the air are ionized by receiving energy from electrons generated by the discharge, and H ⁺ Ions of (H ₂ O) _m (m is an arbitrary natural number) and O ₂ ⁻ (H ₂ O) _n (n is an arbitrary natural number) are generated and released into the space by a fan or the like. These H ⁺ (H ₂ O) _m and O ₂ ⁻ (H ₂ O) _n adhere to the surface of the floating bacteria and chemically react to generate H ₂ O ₂ or (.OH) as an active species. Since H ₂ O ₂ or (.OH) exhibits extremely strong activity, it can surround and sterilize and inactivate airborne bacteria in the air. Here, (.OH) is a kind of active species and represents radical OH.

Hydrogen peroxide H ₂ O ₂ or hydroxyl radicals (.OH), which are active species, oxidize or decompose harmful substances to form chemical substances such as formaldehyde and ammonia, harmless substances such as carbon dioxide, water, and nitrogen It can be made substantially harmless by converting to.

  Accordingly, the ion generator and the blower fan shown in FIG. 1 are mounted on an electrical device, and the positive and negative ions generated by the ion generator shown in FIG. 1 are sent out of the main body by driving the blower fan. Can do. And, by the action of these positive ions and negative ions, it is possible to inactivate fungi and fungi in the air and suppress their growth, and to substantially detoxify harmful substances.

  In addition, positive ions and negative ions have a function to inactivate viruses such as Coxsackie virus and polio virus, and can prevent contamination due to contamination of these viruses. In addition, it has been confirmed that positive ions and negative ions have a function of decomposing molecules that cause odors, and can be used to deodorize spaces.

  Since the ion generator shown in FIG. 1 can change the charge / discharge frequency of the capacitor 4 per second to, for example, 600 times / second, 60 times / second, 240 times / second, etc., as described above. The number of discharges per second in the discharge unit 8 and the second discharge unit 9 can be changed to, for example, 600 times / second, 60 times / second, 240 times / second, and the like. By increasing the number of discharges per second in the first discharge unit 8 and the second discharge unit 9 to increase the amount of ions generated in the first discharge unit 8 and the second discharge unit 9, the above-mentioned floating mold fungus, etc. The effects of sterilization / inactivation of viruses, inactivation of viruses, deodorization of space, etc. can be enhanced.

  Next, a case where the relay contact RY0b is off under the control of the microcomputer 13 will be described. In this case, since the first discharge electrode 8a of the first discharge unit 8 is not biased, an impulse-like alternating voltage generated at both ends of the secondary winding 7b of the step-up transformer 7 is applied to the first discharge unit 8 as it is. Therefore, most of the positive ions and negative ions generated from the first discharge part 8 disappear due to neutralization or the like. Therefore, a small amount of positive ions and negative ions are released from the first discharge part 8. Further, in the present embodiment, when the relay contact RY0b is controlled to be turned off, the signal S1 is not fixedly turned on and the capacitor 4 is charged / discharged 60 times per second (AC output from the AC commercial power supply 1). (When the frequency of the voltage is 60 Hz) or 58.3 times (when the frequency of the AC voltage output from the AC commercial power supply 1 is 50 Hz).

  Further, since the cathode of the diode 11 whose anode is connected to the second discharge electrode 9a of the second discharge unit 9 is electrically connected to one side of the AC commercial power source 1, it is a ground terminal, and in some cases, the AC commercial power source. The voltage of the second discharge electrode 9a and the second induction electrode 9b with respect to one side of 1 is a negative bias of an impulse-like alternating voltage generated in the secondary winding 7c. The potentials of the second discharge electrode 9a and the second induction electrode 9b with respect to one side of the AC commercial power supply 1 are negative, and positive ions generated from the second discharge unit 9 are generated on the second discharge electrode 9a. Neutralizes and negative ions are repelled and released.

  As is clear from the above description, when the relay contact RY0b is off under the control of the microcomputer 13, a small amount of positive ions and negative ions emitted from the first discharge part 8 and the second discharge part 9 are emitted. A large amount of negative ions results in a negative ion rich state as a whole with a small amount of positive ions and a large amount of negative ions.

  Therefore, if you want to supply a large amount of negative ions to the space where there is an excess of positive ions in household electrical equipment, etc., and you want to have a positive and negative ion balance like in a forest in nature, and a relaxation effect Can be requested.

  Next, the configuration of the ion generating element included in the ion generating apparatus shown in FIG. 1 will be described. A top view of the ion generating element included in the ion generating apparatus shown in FIG. 1 is shown in FIG. 6 (a), where the discharge electrode is cut along the line AA and the induction electrode is cut along the line BB. Is shown in FIG. The ion generating element includes a dielectric 16 (upper dielectric 16a and lower dielectric 16b), and a first discharge unit 8 (first discharge electrode 8a, first induction electrode 8b, discharge electrode contact 8c, induction electrode contact 8d. , Connection terminals 8e and 8f, and connection paths 8g and 8h) and the second discharge part 9 (second discharge electrode 9a, second induction electrode 9b, discharge electrode contact 9c, induction electrode contact 9d, connection terminal 9e and 9f, connection paths 9g and 9h), and a coating layer 17.

  The dielectric 16 is formed by laminating a substantially rectangular parallelepiped upper dielectric 16a and lower dielectric 16b (for example, 15 [mm] long × 37 [mm] wide × 0.45 [mm] long). If an inorganic material is selected as the material of the dielectric 16, ceramics such as high-purity alumina, crystallized glass, forsterite, and steatite can be used. If an organic material is selected as the material of the dielectric 16, a resin such as polyimide or glass epoxy having excellent oxidation resistance is suitable. However, in view of corrosion resistance, it is desirable to select an inorganic material as the material of the dielectric 16, and in view of formability and ease of electrode formation described later, it is preferable to use ceramic. . Further, it is desirable that the insulation resistance between the first discharge electrode 8a and the first induction electrode 8b and the insulation resistance between the second discharge electrode 9a and the second induction electrode 9b are uniform, As the material of the dielectric 16, it is preferable that the density variation is small and the insulation rate is uniform. The shape of the dielectric 16 may be other than a substantially rectangular parallelepiped (such as a disk, an ellipse, or a polygon), and may be a cylinder, but considering productivity. As in the present embodiment, it is preferable to have a flat plate shape (including a disk shape and a rectangular parallelepiped shape).

  The first discharge electrode 8a and the second discharge electrode 9a are formed integrally with the upper dielectric 16a on the surface of the upper dielectric 16a. The material of the first discharge electrode 8a and the second discharge electrode 9a can be used without particular limitation as long as it has conductivity, such as tungsten. The condition is not to wake up.

  The first induction electrode 8b is provided in parallel with the first discharge electrode 8a with the upper dielectric 16a interposed therebetween, and the second induction electrode 9b has the second discharge with the upper dielectric 16a interposed therebetween. It is provided in parallel with the electrode 9a. With such an arrangement, the distance between the first discharge electrode 8a and the first induction electrode 8b (hereinafter referred to as the first interelectrode distance) and the second discharge electrode 9a and the second induction electrode 9b. (Hereinafter referred to as the second interelectrode distance) can be made constant, so that the insulation resistance between the discharge electrode and the induction electrode is made uniform to stabilize the discharge state, and positive ions and negative ions are It can be suitably generated. When the dielectric 16 is cylindrical, the first discharge electrode 8a and the second discharge electrode 9a are provided on the outer peripheral surface of the cylinder, and the first induction electrode 8b and the second induction electrode 9b are provided. By providing it in a shaft shape, the distance between the first electrodes and the distance between the second electrodes can be made constant. As a material of the first induction electrode 8b and the second induction electrode 9b, as in the case of the first discharge electrode 8a and the second discharge electrode 9b, for example, as long as it has conductivity, for example, tungsten. It can be used without limitation, but it is a condition that it does not cause deformation such as melting by electric discharge.

  The discharge electrode contact 8c is electrically connected to the first discharge electrode 8a via a connection terminal 8e provided on the same formation surface as the first discharge electrode 8a (that is, the surface of the upper dielectric 16a) and a connection path 8g. Is connected to. Therefore, if one end of a lead wire (such as a copper wire or an aluminum wire) is connected to the discharge electrode contact 8c and the other end of the lead wire is connected to the secondary winding 7b of the step-up transformer 7 and the cathode of the diode 10, 1 discharge electrode 8a, the secondary winding 7b of the step-up transformer 7 and the diode 10 can be electrically connected.

  The discharge electrode contact 9c is electrically connected to the second discharge electrode 9a via a connection terminal 9e provided on the same formation surface as the second discharge electrode 9a (that is, the surface of the upper dielectric 16a) and a connection path 9g. Is connected to. Therefore, if one end of a lead wire (such as a copper wire or an aluminum wire) is connected to the discharge electrode contact 9c and the other end of the lead wire is connected to the secondary winding 7c of the step-up transformer 7 and the anode of the diode 11, The second discharge electrode 9a can be electrically connected to the secondary winding 7c of the step-up transformer 7 and the diode 11.

  The induction electrode contact 8d is electrically connected to the first induction electrode 8b via a connection terminal 8f provided on the same formation surface as the first induction electrode 8b (that is, the surface of the lower dielectric 16b) and a connection path 8h. Is connected to. Therefore, if one end of a lead wire (such as a copper wire or an aluminum wire) is connected to the induction electrode contact 8d and the other end of the lead wire is connected to the secondary winding 7b of the step-up transformer 7, the first dielectric electrode 8b And the secondary winding 7b of the step-up transformer 7 can be electrically connected.

  The induction electrode contact 9d is electrically connected to the second induction electrode 9b via a connection terminal 9f and a connection path 9h provided on the same formation surface as the second induction electrode 9b (that is, the surface of the lower dielectric 16b). Is connected to. Therefore, if one end of a lead wire (such as a copper wire or an aluminum wire) is connected to the induction electrode contact 9d and the other end of the lead wire is connected to the secondary winding 7c of the step-up transformer 7, the second dielectric electrode 9b And the secondary winding 7c of the step-up transformer 7 can be electrically connected.

  Further, the discharge electrode contacts 8c and 9c and the induction electrode contacts 8d and 9d are provided on the surface of the dielectric 16 other than the surface on which the first discharge electrode 8a and the second discharge electrode 9a are provided. desirable. With such a configuration, unnecessary lead wires or the like are not provided on the upper surface of the dielectric 16, so that the ion generator shown in FIG. 1 and a blower fan that sends out ions generated by the ion generator into the air are provided. In the mounted electrical device, the air flow from the blower fan (not shown) is less likely to be disturbed, and neutralization of positive ions and negative ions can be reduced. Considering the above, in the ion generating element shown in FIG. 6, the discharge electrode contacts 8 c and 9 c and the induction electrode contacts 8 d and 9 d are provided on the surface opposite to the upper surface of the dielectric 16.

  In the ion generating element shown in FIG. 6, the first discharge electrode 8a and the second discharge electrode 9a have an acute angle portion, and an electric field is concentrated at the portion, thereby causing a local discharge.

  The ion generator according to the present invention described above may be mounted on an electric device such as an air conditioner, a dehumidifier, a humidifier, an air purifier, a refrigerator, a fan heater, a microwave oven, a washing dryer, a vacuum cleaner, or a sterilizer. . And it is good to equip such an electric equipment with the sending means (for example, ventilation fan) which sends out the ion which generate | occur | produced with the ion generator in the air. In such an electric device, in addition to the original function of the device, the action of positive ions and negative ions released from the installed ion generator inactivates molds and fungi in the air to suppress their growth. The indoor environment can be brought into a desired atmosphere state.

  In the above-described embodiment, the positive ion and the negative ion are individually generated, and the ion generator of the system in which each of the bipolar ions is independently released into the room has been described. An ion generator of a type that alternately generates ions and negative ions at a predetermined cycle may be used.

  The present invention is not limited to the above-described embodiment, and can be implemented by appropriately changing the configuration of each part and the like without departing from the spirit of the present invention. For example, the full-wave rectifier circuit is used in the above embodiment, but a half-wave rectifier circuit may be used. In the above embodiment, the signal S1 output from the microcomputer 13 is a fixed high-level signal or a signal synchronized with the rising edge of the power supply clock signal S0. The signal may be synchronized with the falling edge of the power supply clock signal S0. In the above embodiment, when the relay contact RY0b is turned off, the signal S1 is not fixedly turned on. However, the signal S1 is fixedly turned on similarly to when the relay contact RY0b is turned on. The state and the state where the signal S1 is not fixedly turned on may be switched.

These are figures which show the electrical structural example of the ion generator which concerns on this invention. These are figures which show each part voltage waveform of the ion generator shown in FIG. These are figures which show each part voltage waveform of the ion generator shown in FIG. These are figures which show each part voltage waveform of the ion generator shown in FIG. These are figures which show each part voltage waveform of the ion generator shown in FIG. These are figures which show the structure of the ion generating element which the ion generator shown in FIG. 1 comprises. These are figures which show the electrical structural example of the ion generator which can switch an ion generation amount to two steps. These are figures which show the electrical structural example of the ion generator which can switch an ion generation amount to 3 steps | paragraphs.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 AC commercial power supply 2 Input resistance 3 Full wave rectifier circuit 4 Capacitor 5, 10, 11 Diode 6 Switching element for transformer drive 7 Step-up transformer 8 1st discharge part 9 2nd discharge part 8a 1st discharge electrode 8b 1st dielectric Electrode 9a Second discharge electrode 9b Second dielectric electrode 12 Power supply clock circuit 13 Microcomputer 14 Resistance 15 SSR (Solid State Relay)
16 Dielectric 17 Coating layer RY0a Relay coil RY0b Relay contact

Claims (4)

At least one discharge part;
An ion generator comprising: a voltage application circuit that converts an AC voltage supplied from an AC power source and applies a predetermined voltage to the discharge unit;
The voltage application circuit includes a switching element, a control unit for controlling the switching element, and a charge / discharge circuit having a fixed time constant, and applies a predetermined voltage application for each discharge of the charge / discharge circuit. A voltage is supplied to the charge / discharge circuit when the switching element is on, and no voltage is supplied to the charge / discharge circuit when the switching element is off,
The control unit detects a zero cross of the AC voltage, turns on the switching element when the phase of the AC voltage is in a predetermined range, and turns on the switching element when the phase of the AC voltage is outside the predetermined range. The ion generator characterized by turning off.   The control unit detects a zero cross of the AC voltage, turns on the switching element when the phase of the AC voltage is in a predetermined range, and turns on the switching element when the phase of the AC voltage is outside the predetermined range. The ion generator of Claim 1 which switches the 1st control mode which turns OFF, and the 2nd control mode which hold | maintains the said switching element in an ON state. The first control mode has a plurality of control modes different from each other in the predetermined range;
The ion generation apparatus according to claim 2, wherein the control unit further selects one mode from the plurality of control modes when the first control mode is selected by mode switching.   An electrical apparatus comprising: the ion generator according to any one of claims 1 to 3; and a sending unit that sends out ions generated by the ion generator into the air.

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