JP6527977B2 - Ion generator - Google Patents

Description

  The present invention relates to an ion generator that generates ions by application of a high voltage.

  Patent documents 1 and 2 disclose an ion generator which connects a discharge electrode and an induction electrode to a high voltage generation circuit and generates ions from the discharge electrode by corona discharge. The ion generator disclosed in Patent Document 1 includes a step-up transformer in which a high voltage generation circuit includes a primary coil and a secondary coil. A pair of discharge electrodes are respectively connected to one end of the secondary coil via a diode, and the other end is connected to a grounded induction electrode.

  A switching element such as a thyristor is provided on the primary side of the step-up transformer, and a capacitor and a diode are connected in parallel to the primary coil. A resonant circuit is formed on the primary side of the step-up transformer by the capacitor and the primary coil. On the secondary side of the step-up transformer, a resonant circuit is formed by the capacitance between the discharge electrode and the induction electrode and the secondary coil.

  When power is supplied to the high voltage generation circuit, current flows in a predetermined direction to charge the capacitor. When the voltage between the terminals of the capacitor rises and reaches the break over voltage of the thyristor, the thyristor is short-circuited. As a result, the charge stored in the capacitor is discharged and a current flows through the primary coil to generate an induced electromotive force in the secondary coil.

  The resonant circuit on the secondary side of the step-up transformer resonates by the induced electromotive force, and a positive voltage and a negative voltage are applied between the discharge electrode and the induction electrode at a predetermined frequency. As a result, the discharge electrode is corona discharged to generate positive ions and negative ions.

  On the other hand, an oscillating voltage is generated to form a resonant circuit on the primary side of the step-up transformer, but the current of the second wave is rapidly attenuated because it flows through a diode connected in parallel to the primary coil. Thereby, the induced electromotive force of the secondary coil by the oscillating voltage of the primary side of a pressure | voltage rise transformer is suppressed. Therefore, distortion of the output voltage of the secondary coil due to the difference in frequency between the primary side and the secondary side can be prevented, and ions can be generated stably.

  In the ion generator disclosed in Patent Document 2, a plurality of discharge electrodes (discharge needles) are mounted in one direction on a discharge substrate and mounted, and a high voltage generation circuit and the discharge substrate are accommodated in a housing of an insulator. The discharge electrode protrudes from the housing, and an induction electrode (ground electrode portion) consisting of a pair of metal rods extending in the direction in which the discharge electrodes are arranged is mounted on the housing with the discharge electrode interposed therebetween. The induction electrode is grounded via a connection line connected to one end in the longitudinal direction.

  Then, a positive voltage and a negative voltage are applied between the discharge electrode and the induction electrode by the high voltage generation circuit. As a result, the discharge electrode is corona discharged to generate positive ions and negative ions.

JP-A 2003-7427 (Page 2-Page 3, Figure 2) JP 2007-157541 A (page 5-page 10, FIG. 1) JP, 2011-96555, A (page 4-page 5, FIG. 1)

  According to the ion generating device disclosed in Patent Document 1, when the discharge electrode is deteriorated due to use over time, the discharge becomes weak and the amount of generated ions decreases. Since this requires replacement of the ion generating device, it is desirable to extend the life of the ion generating device.

  Further, according to the ion generator disclosed in Patent Document 2, the connection line to be grounded is connected to one end of the induction electrode in the longitudinal direction, and is arranged outside the discharge electrodes arranged in parallel in the longitudinal direction. For this reason, there existed a problem to which an ion generator becomes large.

  Moreover, since the induction electrode which consists of a metal rod extended to one direction is provided, there existed a problem to which an ion generator becomes larger, and a number of parts increases.

  An object of this invention is to provide the ion generator which can aim at lifetime improvement. Another object of the present invention is to provide an ion generator which can be miniaturized. Another object of the present invention is to provide an ion generator capable of reducing the number of parts.

  In order to achieve the above object, the present invention provides a high voltage applying a high voltage between a discharge substrate provided with a pair of discharge electrodes, an induction electrode facing the discharge electrode, the discharge electrode and the induction electrode An ion generating apparatus comprising: a generation circuit; and a housing for housing at least the discharge substrate and the high voltage generation circuit, wherein the housing has an isolation chamber surrounded by a partition wall for partitioning between a pair of the discharge electrodes. A connecting member for connecting the induction electrode and the high voltage generation circuit may be disposed in the isolation chamber.

  Further, the present invention is characterized in that, in the ion generating apparatus having the above-described configuration, the mounting surface of the discharge substrate is molded with a molding material, and the molding material is filled in the gap between the discharge substrate and the partition wall.

  Further, according to the present invention, in the ion generating apparatus having the above configuration, the induction electrode is formed in a pattern on an opposing substrate facing the discharge substrate, and an upper end or an upper wall of a peripheral wall of the isolation chamber is in contact with the opposing substrate. And

  Further, the present invention is characterized in that in the ion generating apparatus of the above-described configuration, the opposite substrate is disposed on the outer wall of the housing, and the outer wall is provided with an opening through which the connection member is inserted.

  Further, according to the present invention, in the ion generating device having the above configuration, the discharge substrate is divided into a first substrate portion on which one of the discharge electrodes is mounted and a second substrate portion on which the other discharge electrode is mounted. It is characterized.

  Further, according to the present invention, in the ion generating apparatus having the above configuration, the high voltage generation circuit includes a step-up transformer including a primary coil and a secondary coil to mount at least the secondary coil on the discharge substrate, A conductive shield case is formed in an open bottomed cylindrical shape to cover the step-up transformer, and a slit into which the peripheral wall of the shield case is inserted is between the discharge electrode of the discharge substrate and the secondary coil. It is characterized by being provided.

  Further, according to the present invention, in the ion generating apparatus having the above configuration, the high voltage generation circuit includes a capacitor forming a resonant circuit with the primary coil, and the shield case bends the open end of the peripheral wall to form the primary coil and the primary coil. It is characterized by having a shielding part which divides between a capacitor.

  The present invention is characterized in that, in the ion generating device having the above-mentioned configuration, the shield case has an extending portion covering one part of the capacitor by extending one peripheral wall from the opening side beyond the slit.

  Further, according to the present invention, in the ion generating apparatus having the above configuration, a high voltage generating circuit having a step-up transformer including a primary coil and a secondary coil, a housing formed of a conductive resin and containing the high voltage generating circuit, A connector portion provided in a housing and connected to an external power supply for supplying power to the high voltage generation circuit, a discharge electrode connected to one end of the secondary coil, and the other end of the secondary coil A GND line connected to the GND terminal, and a connection line connecting the GND line and the housing on the GND terminal side with respect to the high voltage generation circuit, the housing opens an opening facing the discharge electrode And an induction electrode facing the discharge electrode.

  Further, the present invention is characterized in that, in the ion generating apparatus having the above-mentioned structure, the housing is made of a resin containing carbon or PBT.

  According to the present invention, since the current variable portion is provided to change the current in one direction of the primary coil to which the oscillating voltage is applied, the current of the primary coil is increased when the discharge electrode ages and the voltage of the secondary coil is increased. Can be increased to suppress the decrease of ions. Therefore, even if the discharge electrode is deteriorated, the ion generator can be used continuously, and the life of the ion generator can be extended.

  Further, according to the present invention, the connection member connecting the induction electrode and the high voltage generation circuit is disposed in the isolation chamber surrounded by the partition wall partitioning the pair of discharge electrodes. Thereby, the ion generator can be miniaturized, and a short circuit between foreign matter and water vapor between the connection member and the discharge electrode can be prevented.

  Further, according to the present invention, the induction electrode is formed of a housing made of a conductive resin, and the housing is connected to the GND line via the connection line on the GND terminal side of the high voltage generation circuit. As a result, the ion generator can be reduced in size and weight, and the number of parts can be reduced, and noise generated from the ion generator can be reduced.

The perspective view which shows the ion generator of 1st Embodiment of this invention Top view showing the inside of the ion generator of the first embodiment of the present invention Front sectional drawing which cut | disconnected the ion generator of 1st Embodiment of this invention by the AA line of FIG. Front sectional drawing which cut | disconnected the ion generator of 1st Embodiment of this invention by the BB line of FIG. Circuit diagram of the ion generator of the first embodiment of the present invention The figure which shows the voltage generated in the secondary coil of the ion generator of 1st Embodiment of this invention. Front sectional drawing which shows the ion generator of 2nd Embodiment of this invention Front sectional drawing which shows the ion generator of 3rd Embodiment of this invention Front sectional drawing which shows the ion generator of 4th Embodiment of this invention The perspective view which shows the ion generator of 5th Embodiment of this invention The circuit diagram of the ion generator of 5th Embodiment of this invention The figure which shows the noise level of the ion generator of 5th Embodiment of this invention.

First Embodiment
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a perspective view of the ion generator of the first embodiment. The ion generator 1 accommodates a high voltage generating circuit 30 (see FIG. 5) and the like described later by a housing 2 made of an insulator ceramic, resin or the like. The housing 2 has a lower cover 3 and an upper cover 4, and the upper surface opening of the lower cover 3 is closed by the upper cover 4.

  An opposing substrate 13 is disposed on the upper surface of the upper cover 4. The opposite substrate 13 is positioned by a rib 4 a protruding on the upper surface of the upper cover 4 and fixed by a locking claw (not shown) provided on the rib 4 a. A connector 5 to which an external power supply is connected is provided on one side of the lower cover 3. Power is supplied to the high voltage generation circuit 30 via the connector unit 5.

  FIG. 2 is a top sectional view showing the inside of the ion generator 1. 3 and 4 show front sectional views of the ion generator 1. 3 shows a cross section taken along the line A-A of FIG. 2, and FIG. 4 shows a cross section taken along the line B-B of FIG. In the lower cover 3, the discharge substrate 11 and the drive substrate 15 are accommodated.

  The connector portion 5 is connected to one end of the drive substrate 15, and a circuit component including the primary coil 31 a of the step-up transformer 31 and the capacitor 32 is mounted. A pair of needle-like discharge electrodes 12 and a secondary coil 31 b of the step-up transformer 31 are mounted on the discharge substrate 11. The mounting surfaces on both sides of the discharge substrate 11 are molded by a molding material 17 such as resin. The entire inside of the lower cover 4 may be molded by the molding material 17. A high voltage generating circuit 30 (see FIG. 5) for applying a high voltage between the discharge electrode 12 and the induction electrode 14 is formed by the circuit components on the discharge substrate 11 and the drive substrate 15.

  In the lower cover 3, a conductive shield case 20 such as metal is provided. The shield case 20 is formed in a bottomed cylindrical shape in which an end face on the connector portion 5 side is opened, and covers the step-up transformer 31. The noise generated from the step-up transformer 31 can be shielded by the shield case 20.

  At this time, the back side wall of the shield case 20 is inserted into the slit 11 c formed between the discharge electrode 12 of the discharge substrate 11 and the secondary coil 31 b. Thus, the step-up transformer 31 can be reliably covered by the shield case 20 while avoiding the discharge electrode 12. Further, part of the discharge substrate 11 and the step-up transformer 31 are covered by the shield case 20 because the slit 11 c is provided. Therefore, it is not necessary to cover the entire discharge substrate 11 with the shield case 20, and the cost of the ion generator 1 can be reduced by miniaturizing the shield case 20.

  The shield case 20 has a shielding portion 20a in which the lower wall on the opening side is bent upward. The shielding portion 20 a divides the space between the primary coil 31 a of the step-up transformer 31 and the capacitor 32. Thereby, the influence of the noise generated from the step-up transformer 31 on the capacitor 32 can be reduced.

  Further, the shield case 20 has an extending portion 20b in which an upper wall extends from the opening side more than the slit 11c. The extending portion 20 b covers the upper side of the capacitor 32 and can shield noise generated from the capacitor 32. The side wall on the front side of the shield case 20 may extend beyond the slit 11 c from the opening side.

  The upper cover 4 of the housing 2 is provided with a pair of openings 4 b facing the discharge electrode 12. The counter substrate 13 is provided with a pair of through holes 13a overlapping the opening 4b. An induction electrode 14 is formed in a pattern on the lower surface of the counter substrate 13. The induction electrode 14 is formed by connecting a pair of annular portions 14a disposed around the through hole 13a by a linear connection portion 14b.

  Further, an opening 18a is opened in the upper cover 4 between both the openings 4b, and a partition wall 19 having a U-shaped cross section in the upper surface section is formed extending downward from the periphery of the opening 18a. The open end of the back side (upper side in FIG. 2) of the partition wall 19 is formed to be in contact with the peripheral wall of the lower cover 3. The partition wall 19 partitions the pair of discharge electrodes 12, and an isolation chamber 18 surrounded by the partition wall 19 is formed in the housing 2. The peripheral wall of the isolation chamber 18 is formed by a partition wall 19 extending from the peripheral edge of the opening 18 a, and the upper end of the peripheral wall of the isolation chamber 18 contacts the opposite substrate 13 and the lower end contacts the discharge substrate 11.

  The upper cover 4 may be provided with the upper wall of the isolation chamber 18, and the opening 18a may be opened in the upper wall. At this time, the opposite substrate 13 is disposed in contact with the upper wall of the isolation chamber 18. Alternatively, the dividing wall 19 may be protruded from the peripheral wall of the lower cover 3 to form the isolation chamber 18.

  As will be described later in detail, one end of the secondary coil 31b forming the high voltage generation circuit 30 (see FIG. 5) is connected to the discharge electrode 12, and the other end is connected to the induction electrode. At this time, the connection member 16, one end of which is soldered to the induction electrode 14, is disposed in the isolation chamber 18, and the other end of the connection member 16 is soldered to the discharge substrate 11. The connection member 16 is connected to the secondary coil 31 b via the conductor pattern on the discharge substrate 11.

  Thus, the connection member 16 connecting the induction electrode 14 and the step-up transformer 31 is not disposed outside the plurality of discharge electrodes 12 as in the conventional example, but is disposed between the pair of discharge electrodes 12. For this reason, the ion generator 1 can be miniaturized.

  At this time, since the upper end of the partition wall 19 is in contact with the counter substrate 13 and the lower end is in contact with the discharge substrate 11, the connection member 16 and the discharge electrode 12 are separated. Therefore, a short circuit due to foreign matter or water vapor between the connection member 16 and the discharge electrode 12 can be prevented.

  Further, the molding material 17 is filled in a gap formed slightly between the lower end of the partition wall 19 and the discharge substrate 11. Thereby, the connection member 16 and the discharge electrode 12 can be more reliably separated.

  FIG. 5 is a circuit diagram showing a drive circuit of the ion generator 1. The drive circuit is connected to an external power supply (not shown) via the terminals 5 a and 5 b provided in the connector unit 5. The terminal 5 b is a GND terminal and is connected to the GND line 38.

  A diode D1, an input resistor R, and a capacitor 32 are connected in series between the terminals 5a and 5b. In addition, the primary coil 31 a of the step-up transformer 31 and the switching element 33 connected in series are connected in parallel to both ends of the capacitor 32. The capacitor 32 and the primary coil 31 a form a resonant circuit on the primary side of the step-up transformer 31. The switching element 33 is formed of Sidak (registered trademark) or a thyristor, and becomes conductive when the voltage across the capacitor 32 reaches a predetermined voltage. The switching element 33 may be formed of another element that conducts when the voltage across the capacitor 32 reaches a predetermined voltage.

  A diode D2 and a current variable unit 34 connected in series are connected in parallel to both ends of the capacitor 32. In the current variable section 34, a current flows in one direction by the diode D2, and this current is varied by a variable resistor controlled by the microcomputer 35. At this time, the microcomputer 35 varies the current of the current variable unit 34 based on the detection result of the ion detection unit 36 which detects the amount of ions generated from the discharge electrode 12.

  A pair of discharge electrodes 12 is connected to one end of the secondary coil 31b of the step-up transformer 31 via a diode D3 and a diode D4, respectively. The diode D3 connects the cathode to the secondary coil 31b, and the diode D4 connects the anode to the secondary coil 31b. The induction electrode 14 is connected to the other end of the secondary coil 31 b. The secondary side resonance circuit of the step-up transformer 31 is formed by the capacitance between the discharge electrode 12 and the induction electrode 14 and the secondary coil 31 b.

  When a voltage is applied between the terminals 5a and 5b from the external power supply, the capacitor 32 is charged via the diode D1 and the input resistor R. When the voltage across the terminals of the capacitor 32 rises to a predetermined voltage, the switching element 33 conducts. As a result, the charge stored in the capacitor 32 is discharged through the switching element 33 and the primary coil 31a, and an impulse voltage is generated in the primary coil 31a.

  In the primary coil 31 a, an oscillating voltage is generated which is damped while being vibrated by the resonance circuit on the primary side of the step-up transformer 31. At this time, the damping time of the oscillating voltage is a short time (several tens of μsec to several hundreds of μsec), and the switching element 33 maintains the on state. Then, when the voltage across the capacitor 32 is attenuated and becomes zero, the switching element 33 is turned off, and the capacitor 32 is charged from the external power supply and charge and discharge are repeated.

  When an impulse voltage is generated in the primary coil 31a, energy is transmitted from the primary coil 31a to the secondary coil 31b to generate an electromotive force. As a result, on the secondary side of the step-up transformer 31, positive and negative high voltage pulses are generated alternately at both ends of the secondary coil 31b by the resonance circuit. The negative high voltage pulse generated by the secondary coil 31b is applied to one of the discharge electrodes 12 through the diode D3. Further, the positive high voltage pulse generated in the secondary coil 31b is applied to the other discharge electrode 12 via the diode D4. Thereby, corona discharge occurs at the tip of the discharge electrode 12.

  Therefore, a high voltage generating circuit 30 for applying a high voltage between the discharge electrode 12 and the induction electrode 14 is constituted by a circuit having the capacitor 32, the step-up transformer 31 and the switching element 33.

By corona discharge of the discharge electrode 12 applied to a positive voltage, water molecules in the air are ionized to generate hydrogen ions. These hydrogen ions cluster with water molecules in the air by solvation energy. As a result, positive ions of air ions consisting of H ⁺ (H ₂ O) m (m is 0 or any natural number) are released.

Further, by the corona discharge of the discharge electrode 12 applied to a negative voltage, oxygen molecules or water molecules in the air are ionized to generate oxygen ions. The oxygen ions cluster with water molecules in the air by solvation energy. ^{_{Thus, O 2 - (H 2 O}} ) n (n is an arbitrary natural number) negative ions of the air ions consisting of is released.

H ⁺ _(H 2 O) m and _{^{O 2 - (H 2 O)}} n surrounds these aggregated on the surface of airborne bacteria and odor components in the air. Then, as shown in the formulas (1) to (3), by collision, [· OH] (hydroxyl radical) and H ₂ O ₂ (hydrogen peroxide) which are active species are aggregated and formed on the surface of a microorganism or the like. Destroy airborne bacteria and odorous components. Here, m 'and n' are arbitrary natural numbers. Thus, positive and negative ions can be released to effect sterilization and odor removal in air.

_{^{H + (H 2 O) m}} + O 2 - (H 2 O) n → · OH + 1 / 2O 2 + (m + n) H 2 O ··· (1)
_{^{H + (H 2 O) m}} + H + (H 2 O) m '+ O 2 - (H 2 O) n + O 2 - (H 2 O) n'
→ 2 · OH + O ₂ + (m + m '+ n + n') H ₂ O (2)
_{^{H + (H 2 O) m}} + H + (H 2 O) m '+ O 2 - (H 2 O) n + O 2 - (H 2 O) n'
→ H ₂ O ₂ + O ₂ + (m + m '+ n + n') H ₂ O (3)

  As described above, the capacitor 32 is discharged when the switching element 33 is on, and an oscillating voltage is generated at both ends of the primary coil 31a. When an oscillating voltage is generated on the primary side of the step-up transformer 31, the current in the reverse direction of the diode D2 does not flow in the current variable portion 34, but flows in the primary coil 31a. Also, the forward current of the diode D2 flows through the current variable unit 34.

  At this time, when the resistance value of the current variable portion 34 is reduced (for example, 0 Ω) and the current flowing through the current variable portion 34 is increased, the current does not flow in the primary coil 31 a. On the other hand, when the resistance value of the current variable portion 34 is increased and the current flowing through the current variable portion 34 is decreased, a current flows through the primary coil 31a to generate an electromotive force on the secondary side. Therefore, the current variable portion 34 can change the current in one direction (forward direction of the diode D2) of the primary coil 31a.

  FIG. 6 is a diagram showing a voltage generated in the secondary coil 31b. In the figure, the vertical axis is voltage and the horizontal axis is time. In the drawing, the resistance value of the current variable portion 34 is larger in the state of the solid line E1 than in the state of the broken line E2.

  According to the drawing, in the voltage of the secondary coil 31b, the peak of the first wave after the switching element 33 is turned on becomes negative, and the peak of the second wave becomes positive. When the switching element 33 is turned on, the current does not flow to the current variable portion 34 by the diode D2, and thus flows through the primary coil 31a. As a result, an electromotive force is generated in the secondary coil 31 b to form a first wave. Therefore, the voltages of the first waves of the solid line E1 and the broken line E2 which have different resistance values of the current variable portion 34 are the same.

  Next, when a current flows from the capacitor 32 in the forward direction of the diode D2, a current corresponding to the resistance value flows in the current variable portion. Since the resistance value of the current variable portion 34 is small at the broken line E2, no current flows in the primary coil 31a, and the voltage of the secondary coil 31b is attenuated while the second and subsequent waves vibrate due to the resonance circuit on the secondary side.

  On the other hand, in the solid line E1, since the resistance value of the current variable portion 34 is large, a current flows through the primary coil 31a, and an electromotive force by this flows on the oscillating voltage of the secondary coil 31b. For this reason, the 2nd wave of solid line E1 becomes larger than the 2nd wave of broken line E2. After that, the voltage of the secondary coil 31 b is attenuated by the resonance circuit on the secondary side while the third and subsequent waves vibrate.

  As a result, when the resistance value of the current variable portion 34 is small (as indicated by the broken line E2) (solid line E1), the voltage applied to the discharge electrode 12 is increased, and the amount of generated ions is increased.

  In the present embodiment, when the ion generation amount detected by the ion detection unit 36 (see FIG. 5) is larger than a predetermined threshold, the resistance value of the current variable unit 34 is set to a predetermined standard value. Thus, ions of a threshold value or more can be generated without increasing the voltage applied to the discharge electrode 12 more than necessary, and deterioration of the discharge electrode 12 over time can be suppressed.

  Then, when the amount of generated ions decreases below the threshold due to the aged deterioration of the discharge electrode 12, the microcomputer 35 makes the resistance value of the current variable portion 34 smaller than the standard value (for example, 0 Ω). Thus, the voltage applied to the discharge electrode 12 can be increased to suppress the decrease in ions. Therefore, even if the discharge electrode 12 is deteriorated, the ion generator 1 can be used continuously, and the life of the ion generator 1 can be prolonged.

  Alternatively, a plurality of threshold values for the amount of generated ions detected by the ion detection unit 36 may be provided, and the resistance value of the current variable unit 34 may be varied in multiple steps with respect to each threshold value. Further, although the current variable portion 34 is configured by a variable resistor, another element may be used to change the current in one direction flowing through the primary coil 31a.

  Alternatively, the ion detection unit 36 may be omitted, a timer may be provided, and the current of the current variable unit 34 may be varied based on the usage time of the ion generator 1 detected by the timer. That is, the resistance value of the current variable unit 34 is set to a standard value when the usage time of the ion generator 1 is shorter than a predetermined threshold, and the resistance value of the current variable unit 34 is made smaller than the standard value when it is longer than the threshold. . Thereby, as described above, even if the discharge electrode 12 is deteriorated, the ion generator 1 can be used continuously.

  According to the present embodiment, since the current variable portion 34 is provided to change the current in one direction of the primary coil 31a to which the oscillating voltage is applied, the current of the primary coil 31a is increased when the discharge electrode 12 deteriorates over time. The voltage of the secondary coil 31 b can be increased to suppress the decrease of ions. Therefore, even if the discharge electrode 12 is deteriorated, the ion generator 1 can be used continuously, and the life of the ion generator 1 can be prolonged.

  Further, since the current variable portion 34 including the diode D2 and the variable resistor connected in series is connected in parallel to the primary coil 31a, the current flowing through the primary coil 31a can be easily varied.

  In addition, since the current is varied by the current variable unit 34 based on the detection result of the ion detection unit 36 that detects the generation amount of ions generated in the discharge electrode 12, a desired amount of ions are generated reliably when the discharge electrode 12 is deteriorated. It can be done.

  Further, a connection member 16 connecting the induction electrode 14 and the secondary coil 31 b of the high voltage generation circuit 30 is disposed in an isolation chamber 18 surrounded by a partition wall 19 partitioning the pair of discharge electrodes 12. Thus, the connection member 16 is disposed between the pair of discharge electrodes 12, and the ion generator 1 can be miniaturized. Further, since the connection member 16 and the discharge electrode 12 are partitioned by the partition wall 19, it is possible to prevent a short circuit due to foreign matter or water vapor between the connection member 16 and the discharge electrode 12.

  In addition, since the mounting surface of discharge substrate 12 is molded by molding material 17 and molding material 17 is filled in the gap between discharge substrate 12 and partition wall 19, connection member 16 and discharge electrode 12 are more reliably secured by partition wall 19. Can be divided into

  Further, the induction electrode 14 is formed in a pattern on the counter substrate 13 facing the discharge substrate 11, and the upper end of the partition wall 19 forming the circumferential wall of the isolation chamber 18 is in contact with the counter substrate 13. Thereby, the connection member 16 and the discharge electrode 12 can be more reliably partitioned by the partition wall 19. The upper wall of the isolation chamber 18 may be in contact with the counter substrate 13. Thus, the connection member 16 and the discharge electrode 12 can be more reliably partitioned by the partition wall 19 and the upper wall.

  Further, the counter substrate 13 is disposed on the outer wall of the upper cover 4 of the housing 2 and the opening 18a through which the connection member 16 is inserted is provided in the outer wall, so the upper end or the upper wall of the peripheral wall of the isolation chamber 18 is the counter substrate The ion generator 1 in contact with 13 can be easily realized.

  In addition, it has a bottomed cylindrical conductive shield case 20 covering the step-up transformer 31, and a slit 11c for inserting the peripheral wall of the shield case 20 between the discharge electrode 12 on the discharge substrate 11 and the secondary coil 31b. Provided. As a result, it is not necessary to cover the entire discharge substrate 11 with the shield case 20, and the cost of the ion generator 1 can be reduced by miniaturizing the shield case 20.

  Further, the shield case 20 has a shielding portion 20a which bends the open end of the peripheral wall to separate the primary coil 31a and the capacitor 32 from each other. Thereby, the influence of the noise generated from the step-up transformer 31 on the capacitor 32 can be reduced.

  Further, the shield case 20 has an extending portion 20b which covers a part of the capacitor 32 by extending one circumferential wall from the opening side beyond the slit 11c. Thereby, the noise generated from the capacitor 32 can be shielded.

Second Embodiment
Next, FIG. 7 is a front cross-sectional view of the ion generator 1 of the second embodiment, and shows the same cross section as FIG. 4 described above. For convenience of explanation, the same parts as those of the first embodiment shown in FIGS. 1 to 6 described above are given the same reference numerals. The present embodiment is different from the first embodiment in the configuration of the partition wall 19. The other parts are the same as in the first embodiment.

  The upper cover 4 has an opening 18a between the pair of openings 4b, and the lower cover 3 is formed with a partition wall 19 having a U-shaped cross section in top view projecting from the peripheral wall. The partition wall 19 partitions the pair of discharge electrodes 12, and an isolation chamber 18 surrounded by the partition wall 19 is formed in the housing 2. At this time, the opposite substrate 13 is disposed in contact with the upper wall of the isolation chamber 18. A gap is provided between the upper end of the partition wall 19 and the upper cover 4, and the lower end of the partition wall 19 contacts the discharge substrate 11. Further, the molding material 17 is filled in a gap formed slightly between the lower end of the partition wall 19 and the discharge substrate 11.

  According to the ion generator 1 configured as described above, the connection member 16 connecting the induction electrode 14 and the step-up transformer 31 is not disposed outside the plurality of discharge electrodes 12 as in the conventional example, and disposed between the pair of discharge electrodes 12. Be done. For this reason, the ion generator 1 can be miniaturized.

  At this time, since the lower end of the partition wall 19 is in contact with the discharge substrate 11, the creeping distance between the connection member 16 and the discharge electrode 12 can be increased. Therefore, a short circuit due to foreign matter or water vapor between the connection member 16 and the discharge electrode 12 can be prevented.

  Further, the creeping distance between the connection member 16 and the discharge electrode 12 can be more reliably increased by the mold material 17 filled between the lower end of the partition wall 19 and the discharge substrate 11.

Third Embodiment
Next, FIG. 8 is a front cross-sectional view of the ion generator 1 of the third embodiment, and shows the same cross section as FIG. 4 described above. For convenience of explanation, the same parts as those of the first embodiment shown in FIGS. 1 to 6 described above are given the same reference numerals. The present embodiment is different from the first embodiment in the configuration of the discharge substrate 11. The other parts are the same as in the first embodiment.

  The discharge substrate 11 is divided into a first substrate portion 11 a on which one discharge electrode 12 is mounted and a second substrate portion 11 b on which the other discharge electrode 12 is mounted. The lower ends of the partition walls 19 are in contact with the end portions of the first substrate portion 11a and the second substrate portion 11b, respectively. The lower end of the connection member 16 disposed in the isolation chamber 18 is connected to a lead wire 16 a. The lead wire 16a is connected to the discharge substrate 11 through the space between the first substrate portion 11a and the second substrate portion 11b. Thereby, induction electrode 14 and secondary coil 31b are connected.

  According to this embodiment, the same effect as that of the first embodiment can be obtained. Further, the discharge substrate 11 is divided into a first substrate portion 11 a and a second substrate portion 11 b on which the discharge electrodes 12 are respectively mounted. Thereby, induction electrode 14 and secondary coil 31b can be easily connected via connection member 16 which passes between the 1st substrate part 11a and the 2nd substrate part 11b.

Fourth Embodiment
Next, FIG. 9 is a front cross-sectional view of the ion generator 1 of the fourth embodiment, and shows the same cross section as FIG. 7 described above. For convenience of explanation, the same parts as those of the second embodiment shown in FIG. 7 described above are given the same reference numerals. The present embodiment differs from the second embodiment in the configuration of the discharge substrate 11. The other parts are the same as in the second embodiment.

  The discharge substrate 11 is divided into a first substrate portion 11 a on which one discharge electrode 12 is mounted and a second substrate portion 11 b on which the other discharge electrode 12 is mounted. The lower ends of the partition walls 19 are in contact with the end portions of the first substrate portion 11a and the second substrate portion 11b, respectively. The lower end of the connection member 16 disposed in the isolation chamber 18 is connected to a lead wire 16 a. The lead wire 16a is connected to the discharge substrate 11 through the space between the first substrate portion 11a and the second substrate portion 11b. Thereby, induction electrode 14 and secondary coil 31b are connected.

  According to this embodiment, the same effect as that of the second embodiment can be obtained. Moreover, the induction electrode 14 and the secondary coil 31b can be easily connected via the connection member 16 which passes between the 1st board | substrate part 11a and the 2nd board | substrate part 11b.

Fifth Embodiment
Next, FIG. 10 shows a perspective view of the ion generator 1 of the fifth embodiment. For convenience of explanation, the same parts as those of the first embodiment shown in FIGS. 1 to 6 described above are given the same reference numerals. In the present embodiment, the configuration of the housing 2 is different from that of the first embodiment, and the shield case 20 (see FIG. 3) is omitted. The other parts are the same as in the first embodiment.

  The ion generator 1 accommodates a high voltage generating circuit 30 (see FIG. 5) and the like by a housing 2 having a lower cover 3 and an upper cover 4. The lower cover 3 and the upper cover 4 are formed of a carbon-containing resin or a conductive resin such as PBT (polybutylene terephthalate). Thereby, since the drive circuit is covered by the conductive housing 2, it is possible to shield noise generated from the drive circuit. Moreover, weight reduction of the ion generator 1 can be achieved rather than covering the ion generator 1 with a metal case etc.

  The upper cover 4 has a pair of openings 4b facing the discharge electrode 12 (see FIG. 4), and the induction electrode 14 (see FIG. 11) is formed by the openings 4b as described later. For this reason, the opposing substrate 13 and the rib 4a (see FIG. 1) shown in the first embodiment are omitted.

  FIG. 11 is a circuit diagram showing a drive circuit of the ion generator 1. The description of the same parts as those in FIG. 5 described above will be omitted. One end of the secondary coil 31 b of the step-up transformer is connected to the discharge electrode 12 through the diodes D 3 and D 4, and the other end is connected to the GND line 38. Further, the GND wire 38 and the conductive housing 2 are connected by the lead wire 38 a (connection wire). Thereby, the opening 4b opposed to the discharge electrode 12 is maintained at the GND potential, and the pair of induction electrodes 14 is formed.

  At this time, one end of the lead 38a is connected to the GND line 38 on the terminal 5b (GND terminal) side of the high voltage generation circuit 30 including the capacitor 32, the step-up transformer 31, and the switching element 33. Thus, the induction electrode 14 bypasses the high voltage generation circuit 30 and is connected to the terminal 5 b of the GND potential. Therefore, the influence of noise generated from step-up transformer 31 can be more reliably reduced.

  FIG. 12 is a diagram showing the noise level of the ion generator 1. In the figure, the vertical axis is the noise level, and the horizontal axis is the frequency (unit: Hz). In the figure, the solid line F1 shows this embodiment, and the broken line F2 shows a state in which the shield case 20 (see FIG. 3) is omitted from the ion generator 1 of the first embodiment.

  According to this figure, the solid line F1 of this embodiment can reduce the noise generated from the ion generator 1 even if the shield case 20 (see FIG. 3) is omitted.

  According to this embodiment, the same effect as that of the first embodiment can be obtained. Further, the induction electrode 14 is formed by the housing 2 made of a conductive resin, and the housing 2 is connected to the GND line 38 via the lead wire 38a (connection line) on the terminal 5b (GND terminal) side than the high voltage generating circuit 30. Be done. As a result, the counter substrate 13 and the shield case 20 (see FIG. 3) can be omitted, and no metal case is required, so that the ion generator 1 can be reduced in size and weight, and the number of parts can be reduced. Further, the noise generated from the step-up transformer 31 can be reliably reduced, and the noise generated from the ion generator 1 can be reduced.

  In addition, you may provide the shield case 20 (refer FIG. 3) similar to 1st Embodiment. Thereby, the noise generated from the ion generator 1 can be further reduced.

  In the present embodiment, in the ion generator 1 for in-vehicle use, a constant voltage circuit that converts the input voltage of the terminals 5a and 5b into a predetermined voltage (for example, DC 9 V) is provided on the drive substrate 15. The high voltage generation circuit 30 receives the output voltage of the constant voltage circuit. At this time, it is more preferable to connect the lead wire 38a to the GND wire 38 on the terminal 5b side than the constant voltage circuit. Thus, the influence of noise generated from the constant voltage circuit can be reduced.

  Alternatively, the single induction electrode 14 may be formed by the housing 2 made of a conductive resin in the ion generator 1 in which the single discharge electrode 12 is provided.

  ADVANTAGE OF THE INVENTION According to this invention, it can utilize for the ion generator which generate | occur | produces ion by application of a high voltage.

Reference Signs List 1 ion generator 2 housing 3 lower cover 4 upper cover 4a rib 4b, 18a opening 5 connector 5a, 5b terminal 11 discharge substrate 11a first substrate 11b second substrate 11c slit 12 discharge electrode 13 counter substrate 13a through hole DESCRIPTION OF SYMBOLS 14 Induction electrode 15 Drive board 16 Connection member 16a Lead wire 17 Mold material 18 Separation room 19 Partition wall 20 Shield case 20a Shield part 20b Extension part 30 High voltage generation circuit 31 Step-up transformer 31a Primary coil 31b Secondary coil 32 Capacitor 33 Switching Element 34 Current adjuster 35 Microcomputer 36 Ion detector 38 GND line 38a Lead wire

Claims (8)

A discharge substrate provided with a pair of discharge electrodes, an induction electrode facing the discharge electrode, a high voltage generation circuit for applying a high voltage between the discharge electrode and the induction electrode, at least the discharge substrate and the high voltage generation circuit An ion generating apparatus comprising: a housing for housing a voltage generating circuit, wherein the housing has an isolation chamber surrounded by a partition wall partitioning the pair of discharge electrodes, the induction electrode and the high voltage generating circuit Place a connecting member to connect the
The mounting surface of the discharge substrate is molded with a mold material, and the mold material is filled in the gap between the discharge substrate and the partition wall, and the induction electrode is pattern-formed on the opposing substrate facing the discharge substrate. An ion generating apparatus characterized in that an upper end or an upper wall of a peripheral wall of the isolation chamber is in contact with the opposite substrate . The ion generating apparatus according to claim 1, with disposing the counter substrate on the outer wall of the housing, wherein the connecting member to the outer wall has an opening to be inserted. Wherein the first substrate portion discharge substrate mounted with one of the discharge electrodes, the other of said of claim 1 or claim 2, characterized in that it is divided into a second substrate portion where the discharge electrodes mounted Ion generator. A discharge substrate provided with a pair of discharge electrodes, an induction electrode facing the discharge electrode, a high voltage generation circuit for applying a high voltage between the discharge electrode and the induction electrode, at least the discharge substrate and the high voltage generation circuit An ion generating apparatus comprising: a housing for housing a voltage generating circuit, wherein the housing has an isolation chamber surrounded by a partition wall partitioning the pair of discharge electrodes, the induction electrode and the high voltage generating circuit Place a connecting member to connect the
The high voltage generation circuit includes a step-up transformer including a primary coil and a secondary coil to mount at least the secondary coil on the discharge substrate, and is formed in a bottomed cylindrical shape with one end face opened to form the step-up transformer. An ion generating device comprising: a conductive shield case covering the first and second electrodes; and a slit into which a peripheral wall of the shield case is inserted between the discharge electrode of the discharge substrate and the secondary coil . The high voltage generation circuit has a capacitor that forms a resonant circuit with the primary coil, and the shield case has a shielding portion that bends the open end of the peripheral wall to separate the primary coil from the capacitor. The ion generator according to claim 4 , wherein The ion generating device according to claim 4 or 5 , wherein the shield case has an extending portion that extends from the opening side to a part of the capacitor by extending one peripheral wall more than the slit.   A high voltage generating circuit having a step-up transformer comprising a primary coil and a secondary coil, a housing formed of a conductive resin to accommodate the high voltage generating circuit, and provided in the housing and supplying power to the high voltage generating circuit Connector part to which an external power supply is connected, a discharge electrode connected to one end of the secondary coil, a GND line connecting the other end of the secondary coil to the GND terminal of the connector part, and the high voltage generation A connection line connecting the GND line and the housing is provided on the GND terminal side of the circuit, and the housing opens an opening facing the discharge electrode to form an induction electrode facing the discharge electrode. Ion generator characterized by. The ion generator according to claim 7 , wherein the housing is made of carbon-containing resin or PBT.

Images