JP2007165182A - High-voltage output device and ion generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high-voltage output device capable of outputting a high voltage of pulsating flow for ion generation, without having to use a transformer. <P>SOLUTION: The high-voltage output device is equipped with an AC voltage generation circuit 1 generating AC voltage from a DC power supply voltage V1, a voltage booster circuit 2 boosting voltage by sequentially rectifying the AC voltage over a plurality of steps, and a voltage-adding circuit 3, having a high voltage of pulsating flow made to be outputted from the voltage booster circuit 2, by intermittently impressing a predetermined voltage (V1) for pulsating flow to any voltage output point of the voltage booster circuit 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a high voltage output device that outputs a high voltage that is a relatively high voltage, and more particularly to a high voltage output device that outputs a high voltage for ion generation. The present invention also relates to an ion generator having the high voltage output device. Moreover, this invention relates to the electronic device and thermometer apparatus which have this ion generator. Moreover, this invention relates to the electronic device and thermometer apparatus which have the said high voltage output device.

  Conventionally, ion generators that generate negative ions or positive ions in the atmosphere have been developed in order to improve health and eliminate germs in the air. It is mounted on a conditioner (air conditioner), vacuum cleaner, etc.

  The negative ion refers to a substance having a negative charge among atmospheric ions existing as a medium of electric current in the atmosphere. Many negative ions are present near waterfalls and in forests and the like, and are known to bring about a refreshing effect of mind and body (see Non-Patent Document 1 below). When positive ions come into contact with fine suspended matters in the atmosphere, they positively charge the substances, so they may be used for dust collection. Further, when generating ions, ozone is generated by increasing the applied voltage. It is known that ozone has a bactericidal action.

  For example, Patent Document 1 below discloses a negative ion generator. FIG. 13 shows a circuit diagram of a high voltage generation circuit in the negative ion generator described in Patent Document 1 below.

  In the circuit of FIG. 13, the transistors Q1 and Q2 are switched by the output of the oscillation circuit MV using a DC power source as the operation source, and the primary current of the pulse transformer PT is intermittently connected. The high voltage generated in the secondary coil N2 is amplified by the voltage doubler rectifier circuit. Corona discharge occurs at the tip of the negative discharge electrode to which a negative high voltage obtained by voltage amplification is applied, and negative ions are generated. The voltage waveform that has passed through the voltage doubler rectifier circuit becomes a negative pulsating output that attenuates following the minus pulse.

  The configuration of FIG. 13 attempts to suppress high voltage noise from the secondary coil output to the oscillation circuit MV by inserting a forward diode in series with the primary coil N1. In addition, the useless current consumed during the pulse pause period due to noise is suppressed to reduce the power consumption, and the power source life in battery driving is extended.

Murata Manufacturing Co., Ltd., “Development of low voltage drive ion generator”, [online], March 1, 2005, [November 22, 2005 search], Internet <URL: http://www.murata.co .jp / ninfo / articles / nr04a2.html> JP 2004-31158 A

  In order to generate negative ions or the like, it is necessary to apply a high voltage to an ion generating element such as an electrode. In the conventional circuit represented by FIG. 13, a winding transformer is used, and the secondary output of the winding transformer is boosted by a voltage doubler rectifier circuit to obtain a high voltage for ion generation.

  When a winding transformer is used, an output voltage proportional to the coil turns ratio can be obtained. For example, by increasing the turn ratio to about 1: 100, a high voltage necessary for ion generation can be obtained. is there. However, if the turn ratio is increased in order to obtain a high voltage, the number of turns of the secondary coil increases, and the entire transformer becomes large. In order to reduce the transformer conversion loss, a ferrite core or an iron core for concentrating the magnetic flux is usually inserted at the center of the transformer. For this reason, there existed a problem that a transformer and an ion generator became expensive and became heavy and easily damaged by an impact such as dropping.

  In addition, as a method for generating ions, there are a method of discharging (strongly) in the air and a method with little discharge, but in the former case, much consideration for safety is required and ozone is generated. Since the amount is excessive, it is difficult to adopt it for home air cleaners. For this reason, the latter method is often employed in home air purifiers, etc., but in this case, a high voltage alternating current or pulsating current is applied to the ion generating element in order to obtain a necessary ion generating effect. It is generally known that there is a need to do.

  An object of this invention is to provide the high voltage output device which can output the high voltage of a pulsating flow, without using a transformer in view of said point. Moreover, an object of this invention is to provide the ion generator, electronic device, and thermometer apparatus which have such a high voltage output device.

  In order to achieve the above object, a high voltage output device according to the present invention includes an AC voltage generating means for generating an AC voltage from a DC power supply voltage, and a booster circuit for boosting the AC voltage while sequentially rectifying the AC voltage over a plurality of stages. And a voltage adding circuit for outputting a high voltage of the pulsating flow from the boosting circuit by intermittently applying a predetermined pulsating flow generation voltage to any voltage output point of the boosting circuit. It is characterized by that.

  By configuring as described above, it is possible to output a pulsating high voltage without using a transformer. If the high voltage output device is used in, for example, an ion generator, it may be possible to reduce the size of the ion generator.

  Specifically, for example, the AC voltage generating means includes a first switching element and a third switching element that are interposed in series between a power supply line to which the power supply voltage is applied and a reference potential line. And a second series circuit configured to include a second switching element and a fourth switching element interposed in series between the power supply line and the reference potential line, The first to fourth switching elements are controlled to be turned on / off, so that the first connection midpoint between the first switching element and the third switching element, the second switching element, and the fourth switching element Between the two connection midpoints, a pulsed AC voltage is generated as the AC voltage.

  For example, when the voltage adding circuit applies the pulsating current generation voltage to the voltage output point, the first connection middle point and the second connection middle point are opened.

  Thereby, suppression of useless energy waste can be expected.

  Further, for example, the AC voltage generation means is configured such that when the voltage adding circuit applies the pulsating flow generation voltage to the voltage output point, a voltage applied to the first connection midpoint is a first reverse bias voltage. Alternatively, the voltage applied to the second connection midpoint when the voltage adding circuit applies the pulsating current generation voltage to the voltage output point so as not to be applied to the third switching element is a reverse bias voltage. And reverse bias preventing means for preventing the second or fourth switching element from being added.

  Thereby, each switching element is effectively protected from reverse bias.

  For example, the amplitude of the high-voltage pulsating flow is 600 V or more.

  Further, for example, the booster circuit is configured by a voltage doubler rectifier circuit including a plurality of rectifying diodes and a plurality of smoothing capacitors, and the voltage output circuit applies the pulsating current generation voltage. The point is either a connection point between adjacent smoothing capacitors or the output terminal of the booster circuit.

  In order to achieve the above object, a first ion generator according to the present invention includes any one of the high voltage output devices described above.

  Thereby, miniaturization of the ion generator can be expected.

  Specifically, for example, the high voltage output device outputs a negative high voltage as the high voltage of the pulsating current, and the ion generator generates negative ions using the negative high voltage. appear.

  More specifically, for example, the high voltage output device outputs a positive high voltage as the high voltage of the pulsating flow, and the ion generator uses the positive high voltage to generate positive ions. Is generated.

  In order to achieve the above object, a second ion generator according to the present invention comprises two of the high voltage output devices described above, and one of the high voltage output devices has a negative high voltage. The other high voltage generator is configured to output a positive high voltage as the pulsating high voltage, and the negative high voltage and the positive electrode can be output as the pulsating high voltage. And an output control means for controlling the output timing of the high voltage.

  And, for example, the output control means selectively selects an operation mode of the ion generator from a plurality of operation modes by controlling the two high voltage output devices, and the plurality of operation modes. A first operation mode in which the negative high voltage is output and the positive high voltage output is stopped; and the negative high voltage output is stopped and the positive high voltage is output. And a third operation mode in which the output of both the negative high voltage and the positive high voltage is stopped.

  In order to achieve the above object, a first electronic device according to the present invention includes the first or second ion generator.

  For example, the electronic device further includes contact information input means for inputting information by direct contact with a person, and display means.

  For example, the contact-type information input means includes at least one of biometric information input means that accepts input of biometric information as the information and key input means.

  Further, for example, the electronic device further includes a wireless communication unit for performing wireless communication.

  In order to achieve the above object, a second thermometer device according to the present invention is a thermometer device comprising a thermometer body and a thermometer container for housing the thermometer body. The ion generator is provided in the thermometer housing.

  In order to achieve the above object, a second electronic device according to the present invention includes the high voltage output device according to any one of the above, and causes the high voltage output device to output a high voltage of the pulsating flow. , Positive ions, negative ions, positive ions and ozone, or high voltage product generator that can generate negative ions and ozone as high voltage products, and contact information input where humans directly input information Means and a housing, wherein the housing is configured to be able to seal and open a space including a portion in direct contact with a person to input the information, and the high voltage product generator The high voltage product is supplied into the space when the space is sealed.

  Thereby, an efficient sterilization effect and / or dust removal effect is expected.

  Further, in order to achieve the above object, a second thermometer device according to the present invention is a thermometer device including a thermometer body and a thermometer container for housing the thermometer body. The positive voltage, negative ion, positive ion and ozone, or negative ion and ozone are generated as a high voltage product by outputting the high voltage of the pulsating flow to the high voltage output device. A possible high voltage product generator is provided in the thermometer housing, and the high voltage product generator supplies the high voltage product to a space in which the thermometer body is housed.

  Thereby, an efficient sterilization effect and / or dust removal effect is expected.

  As described above, according to the high voltage output device of the present invention, a high voltage of pulsating current can be output without using a transformer.

<< First Embodiment >>
Hereinafter, a first embodiment of an ion generator according to the present invention will be described in detail with reference to the drawings. FIG. 1 is an overall block diagram of an ion generator according to this embodiment. The ion generator according to the present embodiment is a negative ion generator.

  The ion generator of FIG. 1 includes an AC voltage generation circuit 1, a high voltage generation circuit 2, a voltage addition circuit 3, and an ion generation element 5. Reference numeral 4 denotes a control device for controlling the ion generator. The control device 4 may be provided outside or inside the ion generator. What remove | excluded the ion generating element 5 from the ion generator comprises the high voltage output device which outputs a high voltage. Here, “high voltage” means that when a voltage is applied to the ion generating element 5, the voltage is high enough to allow generation of ions from the ion generating element 5, and the magnitude of the voltage ( The absolute value is, for example, several hundred volts (volts) or more.

  The control device 4 includes a power supply control unit 6 that supplies a DC voltage V1 to the AC voltage generation circuit 1 as a power supply voltage of the ion generator, and AC signals that are control signals UA, UB, LA, and LB for generating the AC voltage. An ion generation voltage output control unit 7 for supplying a control signal Cont to the voltage adding circuit 3 for supplying to the generation circuit 1 and controlling a change timing of the high voltage for ion generation, and a power supply control unit 6 and an ion generation voltage output And a main control unit 8 that comprehensively controls the operation of the control unit 7.

  FIG. 2 shows a configuration example of the power supply control unit 6. A multi-bit digital control signal for determining the voltage value of the DC voltage V1 is supplied from the main control unit 8 to a DAC (digital-analog converter) 6a, and the DC voltage V1 having a voltage value corresponding to the digital control signal. Is supplied from the DAC 6a to the ion generator (AC voltage generating circuit 1) via the semiconductor switching element 6b such as an FET (Field effect transistor). In this way, the main control unit 8 controls the magnitude of the DC voltage V1 supplied to the ion generator in cooperation with the power supply control unit 6.

  The main control unit 8 supplies an on / off control signal for on / off control of the supply of the DC voltage V1 to the ion generator to the semiconductor switching element 6b. When the semiconductor switching element 6b is on, the DC voltage V1 generated by the DAC 6a is supplied to the ion generator and the ion generator is turned on. When the semiconductor switching element 6b is off, the DC voltage V1 is supplied to the ion generator. Is shut off and the ion generator is turned off.

  FIG. 3 shows a specific circuit configuration example of the ion generator of FIG. Hereinafter, the AC voltage generation circuit 1 according to the present embodiment includes transistors Q11 and Q12 that are P-channel FETs (Field effect transistors) for high-side switches, and transistors Q13 and Q14 that are N-channel FETs for low-side switches. And reverse bias preventing diodes D11 and D12 and reverse bias preventing resistors R11 and R12.

  11, 12, 13, and 14 are control signal input terminals (hereinafter simply referred to as “control terminals 11, 12, 13”) that receive control signals UA, UB, LA, and LB from the ion generation voltage output control unit 7 of FIG. And 14 ”). The control terminals 11, 12, 13, and 14 are connected to the gate of the transistor Q11, the gate of the transistor Q12, the gate of the transistor Q13, and the gate of the transistor Q14, respectively. The transistors Q11 to Q14 are on / off controlled according to the voltage levels of the control signals UA, UB, LA, and LB, respectively. The terminals 31 and 32 are a pair of output terminals of the AC voltage generation circuit 1 and a pair of input terminals of the high voltage generation circuit 2.

  The sources of the transistors Q11 and Q12 are connected to the power supply line L1 to which the DC voltage V1 from the power supply control unit 6 is applied, and the sources of the transistors Q13 and Q14 are connected to the 0V ground line (reference potential line) L2. It is connected. The drain of the transistor Q11 is connected to the anode of the diode D11, and the drain of the transistor Q12 is connected to the anode of the diode D12. The anode of the diode D11 is connected to the ground line L2 via the resistor R11, and the anode of the diode D12 is connected to the ground line L2 via the resistor R12.

  The cathode of the diode D11 is connected to the drain of the transistor Q13, and the cathode of the diode D12 is connected to the drain of the transistor Q14. The cathode of the diode D11 corresponding to the midpoint of connection between the transistors Q11 and Q13 is connected to the terminal 31. The cathode of the diode D12 corresponding to the midpoint of connection between the transistors Q12 and Q14 is connected to the terminal 32.

  The high voltage generation circuit 2 includes rectifier diodes D30, D31, D32, D33,..., D36, D37 and D38 (hereinafter, may be referred to as rectifier diodes D30 to D38), a smoothing capacitor C30, C31, C32, C33,..., C36, C37 and C38 (hereinafter may be referred to as smoothing capacitors C30 to C38). The rectifying diodes D30 to D38 are, for example, rectifying diodes that all have the same characteristics, and the smoothing capacitors C30 to C38 are, for example, smoothing capacitors that all have the same capacity.

  The high voltage generation circuit 2 is generally called a Cockcroft-Walton circuit, and is a circuit configured by connecting multiple voltage rectifier circuits in multiple stages in series. Each voltage doubler rectifier circuit includes two rectifying diodes and two smoothing capacitors. For example, the first-stage voltage doubler rectifier circuit (the lowest voltage-side voltage doubler rectifier circuit) includes rectifier diodes D30 and D31 and smoothing capacitors C30 and C31. It comprises rectifier diodes D32 and D33 and smoothing capacitors C32 and C33. The high voltage generation circuit 2 can be regarded as one voltage doubler rectifier circuit.

  A rectifier circuit (for example, a rectifier circuit including a rectifier diode D30 and a smoothing capacitor C30) is formed from one rectifier diode and one smoothing capacitor. Each rectifier circuit is connected in series in a plurality of stages, and the number of stages is n. Although n is an arbitrary integer of 2 or more, the following description will be made assuming that n = 20. That is, in the following description, it is assumed that the number of rectifying diodes and smoothing capacitors constituting the high voltage generation circuit 2 is 20 each. When an AC voltage is supplied to the high voltage generation circuit 2, a high voltage boosted by the number of connection stages of the rectifier circuit is obtained as an output.

  The anode of the rectifying diode D38 is connected to the terminal 34 that is the output terminal of the high voltage generating circuit 2, and the cathode of the rectifying diode D30 is connected to the terminal 32. From the terminal 34 to the terminal 32, rectifying diodes D38, D37, D36,..., D33, D32, D31, and D30 are connected in series in this order in the forward direction.

  Each smoothing capacitor is provided between the anode of one rectifying diode and the cathode of the other rectifying diode, out of two rectifying diodes adjacent to each other. That is, in the smoothing capacitor C38, one electrode is connected to the anode of the rectifying diode D38, and the other electrode is connected to the cathode of the rectifying diode D37. In the smoothing capacitor C37, one electrode is connected to the anode of the rectifying diode D37, and the other electrode is connected to the cathode of the rectifying diode D36. In the smoothing capacitor C33, one electrode is connected to the anode of the rectifying diode D33, and the other electrode is connected to the cathode of the rectifying diode D32. In the smoothing capacitor C32, one electrode is connected to the anode of the rectifying diode D32, and the other electrode is connected to the cathode of the rectifying diode D31. In the smoothing capacitor C31, one electrode is connected to the anode of the rectifying diode D31, and the other electrode is connected to the cathode of the rectifying diode D30. However, in the smoothing capacitor C30, one electrode is connected to the anode of the rectifying diode D30, but the other electrode is connected to the terminal 31.

  Specifically, the DC voltage V1 is, for example, a positive voltage of 30 to 50 V (volts). The ion generator of FIG. 3 is mounted on, for example, a portable electronic device. In a portable electronic device, a lithium ion battery is often used as a driving battery, and the output voltage (about 3.7 V) of the lithium ion battery is not easily shown in the regulator IC (integrated circuit) that is easily available. Is boosted to 30-50V. The DC voltage V1 is generated based on the voltage obtained by the regulator IC. In the following description, it is assumed that the DC voltage V1 is 40V. Further, the voltage value of the DC voltage V1 is represented by V1 (the unit is volts).

  When the transistors Q11 and Q14 are on and the transistors Q12 and Q13 are off, the voltage at the terminal 31 is V1 and the voltage at the terminal 32 is 0V. When the transistors Q11 and Q14 are off and the transistors Q12 and Q13 are on, the voltage at the terminal 31 is 0V and the voltage at the terminal 32 is V1.

  Based on the control signals UA, UB, LA and LB, the AC voltage generation circuit 1 is in a state where the transistors Q11 and Q14 are on and the transistors Q12 and Q13 are off, and the transistors Q11 and Q14 are off. In addition, by alternately repeating the state in which the transistors Q12 and Q13 are on, a pulsed AC voltage having an amplitude (substantially) equal to the magnitude of the DC voltage V1 is generated between the terminals 31 and 32.

  When the voltage at the terminal 31 is V1 and the voltage at the terminal 32 is 0 V, the smoothing capacitor C30 is charged with the voltage V1 via the rectifying diode D30, and the charging voltage of the smoothing capacitor C30 becomes V1 (a voltage between both electrodes). V1 is held). At this time, in the smoothing capacitor C30, the electrode side to which the rectifying diode D30 is connected becomes a negative pole.

  Subsequently, when the voltage at the terminal 31 becomes 0 V and the voltage at the terminal 32 becomes V1, the smoothing capacitor C31 is charged via the rectifying diode D31 with the voltage V1 at the terminal 32 and the previously charged smoothing capacitor C30. The charging voltage of the smoothing capacitor C31 is (2 × V1). At this time, in the smoothing capacitor C31, the electrode side to which the rectifying diode D31 is connected becomes a negative pole.

  When the voltage at the terminal 31 becomes V1 and the voltage at the terminal 32 becomes 0 V again, the smoothing capacitor C32 is charged via the rectifying diode D32 with the voltage V1 at the terminal 31 and the previously charged smoothing capacitor C31. Charged by the voltage (2 × V1) and the charging voltage (−V1) of the smoothing capacitor C30, which is opposite to the smoothing capacitor C32, the charging voltage of the smoothing capacitor C32 is (2 × V1) Become. At this time, in the smoothing capacitor C32, the electrode side to which the rectifying diode D32 is connected becomes a negative pole.

  By repeating the above operation according to the AC voltage supplied between the terminals 31 and 32, the smoothing capacitors C30 to C38 constituting the high voltage generating circuit 2 are charged, and the terminals 31 and 34 are connected between the terminals 31 and 34. Is applied with a negative high voltage obtained by boosting the voltage V1 between the terminal 31 and the terminal 32 by the number of rectifying diodes D30 to D38. A voltage obtained by adding the voltage of the terminal 31 to the negative high voltage is applied between the terminal 34 and the terminal 35 connected to the ground line L2. Since the voltage at the terminal 31 oscillates between 0 V and V1, the terminal 34 outputs a pulsating voltage in which the alternating voltage having the amplitude V1 is superimposed on the negative high voltage.

  In this way, the high voltage generation circuit 2 constitutes a boost circuit that boosts the AC voltage generated by the AC voltage generation circuit 1 while sequentially rectifying it using n output stages (rectifier circuits) connected in series. Yes. The output voltage in each output stage (each rectifier circuit) appears at the anode of each rectifier diode. The connection points to which the anodes of the rectifying diodes D30, D31, D32, and D33 are connected can be considered as voltage output points of the first, second, third, and fourth output stages (rectifier circuits), respectively. The connection points to which the anodes of the diodes D36, D37, and D38 are connected can be considered as voltage output points of the (n-2) th, (n-1) th, and nth output stages (rectifier circuits), respectively.

  The high voltage generated at the terminal 34 is supplied to the ion generating element 5 including a needle-like metal body or the like. As will be described later, in order to efficiently generate negative ions from the ion generating element 5, a high-voltage pulsating flow (the amplitude of the pulsating flow is larger than V1) is applied to the terminal 34. The magnitude of the high voltage to be supplied to the ion generating element 5 in order to generate negative ions depends on the structure of the ion generating element 5, but in order to generate a necessary amount of negative ions, the negative maximum of the pulsating current is generated. For example, the voltage is set to an absolute value of about 800 V to several kV. Therefore, when the voltage value of the DC voltage V1 is 40V as described above, for example, n may be set to 20 or more.

  The voltage adding circuit 3 is composed of a switching element interposed between an arbitrary voltage output point (including the terminal 34) in the output stage (rectifier circuit) connected in multiple stages in the high voltage generating circuit 2 and the power supply line L1. The

  Specifically, for example, the voltage adding circuit 3 includes a transistor Q21 that is a P-channel FET. Reference numeral 21 denotes a control signal input terminal that receives a control signal Cont from the ion generation voltage output control unit 7 of FIG. 1 (hereinafter simply referred to as “control terminal 21”). The control terminal 21 is connected to the gate of the transistor Q21, and the transistor Q21 is ON / OFF controlled according to the voltage level of the control signal Cont.

  The source of the transistor Q21 is connected to the power supply line L1. The DC voltage V1 applied to the source of the transistor Q21 functions as a pulsating current generation voltage. The drain of the transistor Q21 is connected to, for example, a connection point or a terminal 34 of smoothing capacitors C30, C32,..., C36 and C38 connected in series to the terminal 31 side. That is, for example, the connection point 33 is a connection point between the smoothing capacitor C30 and the anode of the rectifying diode D30, a connection point between the smoothing capacitor C32 and the anode of the rectifying diode D32,..., Or the smoothing capacitor C36. Is coincident with the connection point between the rectifier diode D36 and the anode of the rectifier diode D36 or the terminal 34.

  The potential difference between the connection point 33 to which the drain of the transistor Q21 is connected and the power supply line L1 to which the source of the transistor Q21 is connected is equal to or lower than the withstand voltage between the source and drain of the transistor Q21. When a small package of about 3 mm square is adopted as the transistor Q21, the source-drain breakdown voltage is generally about 200V. Therefore, when V1 is 40 V, five stages of smoothing capacitors (including smoothing capacitors C30, C31, C32, and C33) are inserted between the terminal 31 and the connection point 33 from 200 ÷ 40 = 5. Will be.

  Next, with reference to the timing chart of FIG. 4 showing the voltage waveform of each terminal, the flow of operation of each part of the ion generator will be described. FIG. 4 shows voltage waveforms at the control terminals 11, 12, 13, 14 and 21 and the terminals 31, 32 and 34 from the top. The operation of the ion generator should be divided into a pause period P1, a charge period P2, a transition period P3, and a discharge period P4 (hereinafter, these periods may be simply referred to as periods P1, P2, P3, and P4). Can do.

  When the operation of the ion generator is on, P1 → P2 → P3 → P4 → P1 →... That is, the periods P1, P2, P3, and P4 come in this order, and when the period P4 ends, the period P1 starts again, and the processes of the periods P1, P2, P3, and P4 are repeated. The length of each period P1 to P4 is set in advance using an experiment or the like that measures the time required for each period, and the transition from one period to another is, for example, the length of the set time Done according to For example, when the time set from the start of the period P2 has elapsed, control is performed so as to shift to the period P3.

  First, in the idle period P1, the control terminals 11, 12, 13, and 21 are set to the high level, the control terminal 14 is set to the low level, the transistors Q11, Q12, Q14, and Q21 are turned off, and the transistor Q13 is turned on. Thereby, the terminal 31 is fixed to 0V. As a result, the potential in the high voltage generation circuit 2 is prevented from becoming unstable, and noise generation and electrostatic breakdown of the element are prevented. At this time, since the terminal 32 is in an open state (floating state), discharge of charges stored in the smoothing capacitors C31, C33,..., C37 is suppressed, and wasteful waste of energy is suppressed. The

  In the idle period P1, the voltage at the terminal 34 gradually increases from a negative voltage toward 0 V due to discharge of each smoothing capacitor in the high voltage generation circuit 2.

  In the charging period P2 that transitions after the pause period P1, the transistors Q11 and Q14 are turned on and the transistors Q12 and Q13 are turned off by setting the control terminals 11 and 13 to low level and the control terminals 12 and 14 to high level. And a state in which the transistors Q11 and Q14 are turned off and the transistors Q12 and Q13 are turned on are alternately repeated by setting the control terminals 11 and 13 to the high level and the control terminals 12 and 14 to the low level. As a result, a pulsed AC voltage having an amplitude (substantially) coincident with the magnitude of the DC voltage V <b> 1 is generated between the terminals 31 and 32.

  The frequency at which the above two states are repeated, that is, the frequency of the AC voltage generated between the terminals 31 and 32, is the capacitance of the smoothing capacitors C30 to C38 in the high voltage generating circuit 2 and the rectifying diodes D30 to D38. It is determined according to the characteristics. Specifically, the frequency is selected from the range of, for example, several tens of Hz (hertz) to several MHz (megahertz).

  With the supply of the AC voltage from the AC voltage generation circuit 1, the voltage at the terminal 34 gradually decreases. After all the smoothing capacitors C30 to C38 are charged (the charge voltage of each smoothing capacitor except for the smoothing capacitor C30 reaches 2 × V1), and the voltage at the terminal 34 reaches (−n × V1). The charging period P2 shifts to the transition period P3.

  In the charging period P2, the control terminal 21 is set to the high level, and the transistor Q21 is kept off. For this reason, after the voltage of the terminal 34 reaches (−n × V1), the voltage of the terminal 34 becomes a pulsating flow that oscillates between − (n + 1) × V1 and −n × V1. As described above, under the condition of V1 = 40V and n = 20, the pulsating current oscillates between −840V and −800V.

  The period P3 is a transition period from the charge period P2 to the discharge period P4, and the voltage levels of the control terminals 11, 12, 13, and 21 are the same as those in the pause period P1. That is, in the transition period P3, the control terminals 11, 12, 13, and 21 are set to the high level, the control terminal 14 is set to the low level, the transistors Q11, Q12, Q14, and Q21 are turned off, and the transistor Q13 is turned on. In the period P3, the voltage at the terminal 34 is (−n × V1).

  When the transition period P3 transitions to the discharge period P4, the state in which the control terminal 21 is set to low level and the transistor Q21 is turned on and the state in which the control terminal 21 is set to high level and the transistor Q21 is turned off are alternately repeated.

  In the discharge period P4, at the timing when the transistor Q21 is turned on, the control terminal 13 is set to the low level and the transistor Q13 is turned off. As a result, the terminal 31 is opened, and wasteful discharge of each smoothing capacitor is suppressed, so that waste of energy is suppressed. In the discharge period P4, the control terminals 11 and 12 are set to the high level and the control terminal 14 is set to the low level, and the transistors Q11, Q12, and Q14 are kept off. Therefore, both the terminals 31 and 32 are opened at the timing when the transistor Q21 is turned on. In the discharge period P4, at the timing when the transistor Q21 is turned off, the control terminal 13 is set to the high level, the transistor Q13 is turned on, and the voltage at the terminal 31 is fixed to 0V.

  Now, let m be the number of rectifier circuits between the terminal 31 and the connection point 33. For example, if the connection point 33 coincides with the connection point between the anode of the rectifying diode D32 and the smoothing capacitor C32, m = 3.

  In this case, the voltage at the terminal 34 at the timing when the transistor Q21 is turned on in the discharge period P4 is − (n−m) × V1. For this reason, when the control signal Cont of the high level and the low level is alternately applied to the control terminal 21, the voltage level between −n × V1 and − (n−m) × V1 is oscillated at the terminal 34. A pulsating voltage is generated.

  If a small package of about 3 mm square is adopted as the transistor Q21, the source-drain breakdown voltage is generally about 200V, so m is set to 5, for example. Then, since n = 20 and V1 = 40V, a pulsating voltage that oscillates a voltage level between −800V and −600V is generated at the terminal 34 in the discharge period P4.

  If the number of stages n is large, a high voltage having a large absolute value is generated, and more ions (in this embodiment, negative ions) are obtained from the ion generating element 5. In addition, since the larger the amplitude of the pulsating voltage generated at the terminal 34, the more ions are generated from the ion generating element 5, it is desirable to make m as close to n as possible.

  In particular, when the amplitude of the pulsating voltage generated at the terminal 34 is 600 V or more, significant ion generation is recognized from the ion generating element 5. Therefore, under the conditions of V1 = 40V and n = 20, for example, m = 15 and a pulsating voltage that oscillates a voltage level between −800V and −200V may be generated at the terminal 34. For example, when the voltage applied to the ion generating element 5 changes from −200 V to −800 V, for example, many negative ions are generated on the surface of the ion generating element 5.

  Further, as described above, at the timing when the transistor Q21 is on, the transistors Q13 and Q14 are turned off and both the terminals 31 and 32 are opened. Is approximately (m + 1) × V1. When V1 = 40V and m = 5, those voltages are 240V.

  That is, a voltage higher than V1 is applied to the terminals 31 and 32 at the timing when the transistor Q21 is turned on. However, the reverse bias prevention diodes D11 and D12 prevent reverse current flow, so that the transistors Q11 and Q12 are protected from reverse bias. The reverse bias preventing resistors R11 and R12 fix the anode potentials of the diodes D11 and D12 so that the drains of the transistors Q11 and Q12 are in a floating state and a high voltage is not applied.

  When V1 = 40V and the FETs are employed as the transistors Q11, Q12, Q13, Q14, and Q21 as described above, for example, high level and low level signals for the control terminals 11, 12, and 21 are 40V and 35V, respectively. The high level and low level signals for the control terminals 13 and 14 are 5V and 0V, respectively.

  In addition, an example is shown in which P-channel FETs are used as the transistors Q11, Q12, and Q21, and N-channel FETs are used as the transistors Q13 and Q14. However, the voltage level of the control signal to each transistor is The polarity can be easily converted, and the polarity of each transistor is not limited to the above. Furthermore, it is possible to employ various switching elements having a switching function such as bipolar transistors as Q11 to Q14 and Q21.

  Further, the drain of the transistor Q21 may be connected to any connection point of the smoothing capacitors C31, C33,..., C37 connected in series to the terminal 32 side. That is, the connection point 33 is a connection point between the smoothing capacitor C31 and the anode of the rectifying diode D31, a connection point between the smoothing capacitor C33 and the anode of the rectifying diode D33, or the smoothing capacitor C37. It may be a connection point with the anode of the rectifying diode D37.

  However, in this case, since the rectifying diode D38 is interposed in the line between the drain of the transistor Q21 and the terminal 34, a high voltage (for example, 200V) is instantaneously applied when the transistor Q21 is turned on. Join D38. Therefore, it is necessary to employ a diode having a large withstand voltage as the rectifying diode D38 (and the control signal applied to the control terminals 11 to 14 can be changed as appropriate). From this point of view, as described above, any one of the smoothing capacitors C30, C32,..., C36 and C38 in which the drain of the transistor Q21 is connected in series to the terminal 31 without using a rectifying diode. It is preferable to connect to the connection point or the terminal 34.

  Further, by appropriately setting V1, n and m, ozone is generated together with negative ions from the ion generator of FIG. A relatively large amount of ozone is generated by causing a discharge phenomenon in the atmosphere by relatively increasing the magnitude of the high voltage applied to the ion generating element 5.

  If configured as in the present embodiment, a winding transformer is not required to generate a high voltage for ion generation, and therefore, an ion generator that is inexpensive, lightweight, and has high reliability (impact resistance). Can be obtained. For this reason, it becomes easy to mount an ion generator in a small electronic device or the like, and the effect of the ion generator can be enjoyed in the electronic device or the like.

  Also, negative ions can be generated by applying an alternating high voltage to the ion generating element, but at the same time as the alternating high voltage is used, positive ions are also generated and the ions are neutralized. Generation efficiency is poor. In the present embodiment, not the AC voltage but the pulsating addition type DC voltage is used as the high voltage for generating ions, so that only negative ions (only positive ions in the second embodiment to be described later) are generated and high ion generation efficiency. Is obtained.

  Furthermore, since this embodiment uses a pulsating high voltage, the current flowing through the ion generating element during ion generation is 1/10 compared to that of an atmospheric discharge type using a high DC voltage. The power consumption can be reduced.

<< Second Embodiment >>
The ion generator in the first embodiment shown with reference to FIGS. 1 to 4 is a negative ion generator that generates negative ions. However, a positive ion generator may be configured by changing the circuit configuration. Is possible. This plus ion generator will be described as a second embodiment.

  FIG. 5 shows a specific circuit configuration example of the plus ion generator according to the present embodiment. In FIG. 5, the same parts as those in FIG. 3 are denoted by the same reference numerals, and redundant description is omitted. The circuit components of the plus ion generator of FIG. 5 are generally the same as those of the minus ion generator of FIG. 3, but the connection relationship and the signal level of each terminal are different.

  The plus ion generator of FIG. 5 corresponds to the AC voltage generation circuit 1, the high voltage generation circuit 2 and the voltage addition circuit 3 of FIG. 3, and the AC voltage generation circuit 1a, the high voltage generation circuit 2a and the voltage addition circuit 3a. It has. The overall block diagram of the plus ion generator according to the present embodiment is the same as that in FIG. 1, and the control device 4 shown in FIG. 1 has the DC voltage V1 and the control signal UA to the plus ion generator in FIG. , UB, LA, LB and Cont.

  Similar to the AC voltage generation circuit 1 of FIG. 3, the AC voltage generation circuit 1a includes transistors Q11, Q12, Q13, and Q14, diodes D11 and D12 for preventing reverse bias, and resistors R11 and R12 for preventing reverse bias, It is comprised. As in the AC voltage generation circuit 1 of FIG. 3, the control terminals 11, 12, 13, and 14 are connected to the gates of the transistors Q11, Q12, Q13, and Q14, respectively.

  The sources of the transistors Q11 and Q12 are connected to the power supply line L1, and the sources of the transistors Q13 and Q14 are connected to the ground line L2. The drain of the transistor Q11 is connected to the anode of the diode D11 and the terminal 31, and the drain of the transistor Q12 is connected to the anode of the diode D12 and the terminal 32. The cathode of the diode D11 is connected to the drain of the transistor Q13 and is connected to the power supply line L1 via the resistor R11. The cathode of the diode D12 is connected to the drain of the transistor Q14 and is connected to the power supply line L1 via the resistor R12.

  The high voltage generation circuit 2a has the same circuit configuration as the high voltage generation circuit 2 except that the directions of the rectifying diodes are reversed. That is, the rectifying diodes D30, D31, D32, D33,..., D36, D37, and D38 are connected in series in this order from the terminal 32 to the terminal 34. The cathode of the rectifying diode D38 is connected to the terminal 34 which is the output terminal of the high voltage generating circuit 2a, and the anode of the rectifying diode D30 is connected to the terminal 32. Further, in the smoothing capacitor C30, the electrode opposite to the electrode connected to the rectifying diode D30 is connected to the terminal 31.

  The voltage adding circuit 3a is configured by a transistor Q21a that is an N-channel FET, and a control terminal 21 that receives a control signal Cont is connected to the gate of the transistor Q21a. The drain of the transistor Q21a is connected to the connection point 33. As in the first embodiment, the connection point 33 is an arbitrary voltage output point (including the terminal 34) in the output stage (rectifier circuit) connected in multiple stages in the high voltage generation circuit 2a. The source of the transistor Q21a is connected to the ground line L2. The voltage (0 V) applied to the source of the transistor Q21a functions as a pulsating current generation voltage.

  FIG. 6 is a timing chart showing voltage waveforms at each terminal. FIG. 6 shows voltage waveforms at the control terminals 11, 12, 13, 14 and 21 and the terminals 31, 32 and 34 from the top. Similarly to the first embodiment, the operation of the plus ion generator in the present embodiment can be considered by dividing it into a pause period P1, a charge period P2, a transition period P3, and a discharge period P4. P1 → P2 → P3 → P4 → P1 →... Is repeated.

  In the pause period P1 and the transition period P3, the control terminals 11, 13, and 14 are set to the low level and the control terminal 12 is set to the high level, the transistors Q12, Q13, and Q14 are turned off, and the transistor Q11 is turned on. In the pause period P1, the charging period P2, and the transition period P3, the control terminal 21 is set to the low level, and the transistor Q21a is kept off as in the first embodiment.

  In the charging period P2 following the pause period P1, the control terminals 11 and 13 are set to low level and the control terminals 12 and 14 are set to high level to turn on the transistors Q11 and Q14 and turn off the transistors Q12 and Q13. Then, by setting the control terminals 11 and 13 to the high level and the control terminals 12 and 14 to the low level, the transistors Q11 and Q14 are turned off and the transistors Q12 and Q13 are turned on alternately. As a result, a pulsed AC voltage having an amplitude (substantially) coincident with the magnitude of the DC voltage V <b> 1 is generated between the terminals 31 and 32. In response to this AC voltage, the voltage at the terminal 34 rises and finally reaches a voltage of (n × V1).

  In the discharge period P4 following the transition period P3, the state where the control terminal 21 is set to the high level and the transistor Q21a is turned on and the state where the control terminal 21 is set to the low level and the transistor Q21a is turned off are alternately repeated. In the discharge period P4, the transistor Q11 is turned off when the transistor Q21a is turned on, and the transistor Q11 is turned on when the transistor Q21a is turned off. In the discharge period P4, the transistors Q12, Q13, and Q14 are kept off.

  By configuring as described above, a positive pulsating voltage is obtained from the terminal 34. Also in this case, it is desirable that the maximum voltage of the pulsation voltage is 800 V or more and the amplitude of the pulsation voltage is 600 V, as in the first embodiment. Thereby, positive ions are efficiently generated from the ion generating element 5 connected to the terminal 34 of FIG. As in the case of generating negative ions, when the amplitude of the pulsation voltage was set to 600 V or more, a remarkable positive ion generation effect was recognized. When the voltage applied to the ion generating element 5 changes from 200 V to 800 V, for example, a large amount of positive ions are generated on the surface of the ion generating element 5.

  Further, similarly to the ion generator (negative ion generator) of FIG. 3, ozone can be generated together with positive ions from the positive ion generator of FIG. Even in the positive ion generator, a relatively large amount of ozone is generated by causing a discharge phenomenon in the atmosphere by relatively increasing the magnitude of the high voltage applied to the ion generating element 5.

  Even when configured as in the present embodiment, the same effects as in the first embodiment can be obtained.

<< Third Embodiment >>
Further, as shown in FIG. 7, the ion generator (negative ion generator) of FIG. 3 described in the first embodiment is provided as a negative ion generator 41, and the ion of FIG. 5 described in the second embodiment. You may comprise the composite ion generator 44 provided with the generator (plus ion generator) as the plus ion generator 42. FIG. Hereinafter, the composite ion generator 44 will be described as a third embodiment of the present invention.

  The composite ion generator 44 further includes an ion output control unit 43. The ion output control unit 43 functions as the control device 4 (FIG. 1) for both the negative ion generator 41 and the positive ion generator 42, and generates a negative pulsating high voltage and a positive pulsating high voltage. For this purpose, a DC voltage (corresponding to V1 described above) and each control signal (corresponding to UA, UB, LA, LB and Cont described above) necessary for both are supplied to both the negative ion generator 41 and the positive ion generator 42.

  As is obvious from the description of the first and second embodiments, each control signal for the negative ion generator 41 and each control signal for the positive ion generator 42 may have different voltage levels. Further, the voltage value of the DC voltage (corresponding to V1 described above) for the negative ion generator 41 and the positive ion generator 42 may be the same or different. Further, the ion output control unit 43 can freely control the supply or non-supply of the DC voltage (corresponding to V1 described above) to the negative ion generator 41 and the positive ion generator 42.

  The ion output control unit 43 controls the supply / non-supply of each DC voltage and each control signal to generate a negative pulsating high voltage for generating negative ions and a positive polarity for generating positive ions. Each output timing of the pulsating high voltage can be freely changed.

  Therefore, for example, it is possible to perform control such that negative ions from the negative ion generator 41 and positive ions from the positive ion generator 42 are generated simultaneously, or negative ions and positive ions are generated alternately.

  For example, as the operation mode of the composite ion generator 44, the ion output control unit 43 outputs only negative ions by outputting negative pulsating high voltage and stopping output of positive pulsating high voltage. Negative ion generation mode, positive ion generation mode in which only negative ions are generated by stopping output of negative pulsating high voltage and outputting positive pulsating high voltage, and negative and positive pulsating An ion generation stop mode in which the generation of both positive ions and negative ions is stopped by stopping the output of both the flowing high voltage can be freely selected at an arbitrary timing.

<< Fourth Embodiment >>
Next, an embodiment in which an ion generator is provided in a mobile phone device will be described as a fourth embodiment. 8A and 8B are perspective views of the mobile phone device 60 according to the present embodiment. The cellular phone device 60 is a foldable cellular phone device, and the cellular phone device 60 can be folded via a well-known rotating mechanism 71 composed of a hinge or the like. The state of the cellular phone device 60 can be freely changed between an open state (not folded) and a closed state (folded) by an external force applied by the operator.

  FIG. 8A shows a perspective view of the surface of the mobile phone device 60 in a state where the mobile phone device 60 is opened so that the display content of the main display unit 62 can be confirmed, and FIG. The perspective view of the back surface of the mobile telephone apparatus 60 in a state is represented. FIGS. 9A and 9B respectively show a side view and a top view of the mobile phone device 60 in a state in which the mobile phone device 60 is closed. In FIG. 9B, the sub display unit 63 and the like are not shown in order to prevent the drawing from becoming complicated.

  The cellular phone device 60 includes an operation key 61, a main display unit 62, a sub display unit 63, a fingerprint sensor 64, a position selection key 65, an ion generation operation mode setting key 66, an ion generation voltage up key 67, and an ion generation voltage down key 68. , An ion ejection unit 69, an ion generator 70, a rotation mechanism 71, an impact relaxation member 72, an upper housing 73, a lower housing 74, and an imaging unit 75. The rotating mechanism 71, the upper casing 73, and the lower casing 74 constitute a casing of the mobile phone device 60, and the upper casing 73 and the lower casing 74 are separated from each other with the rotating mechanism 71 as a boundary ( However, it is electrically connected).

  On the upper casing surface 76 of the upper casing 73, a main display section 62, an ion generation voltage up key 67, an ion generation voltage down key 68, an ion ejection section 69, and an impact relaxation member 72 are provided. An ion generator 70 is provided inside the upper housing 73.

  An operation key 61, a fingerprint sensor 64, a position selection key 65, and an ion generation operation mode setting key 66 are provided on the lower casing surface 77 of the lower casing 74. A sub display unit 63 and an imaging unit 75 are provided on the back surface 78 of the upper housing 73.

  An operation key 61, a fingerprint sensor 64, a position selection key 65, an ion generation operation mode setting key 66, an ion generation voltage up key 67, and an ion generation voltage down key 68 are directly input by a person who is an operator. It is a contact information input means. Among these contact-type information input means, the fingerprint sensor 64 is biometric information input means for accepting input of biometric information for performing biometric authentication, and other than that, information assigned to the key is used as a fingertip or the like. It is a key input means that is received by a key operation by. It can be said that the main display unit 62 and the sub display unit 63 are components that output information on a form that can be recognized by a person.

  As the ion generator 70, the negative ion generator shown in the first embodiment, the positive ion generator shown in the second embodiment, or the composite ion generator 44 shown in the third embodiment can be adopted. . Hereinafter, description will be made assuming that the ion generator 70 is the composite ion generator 44 (FIG. 7). The positive ions, negative ions, or ozone generated by the ion generator 70 are sent from the ion ejection part 69 that is an opening provided in the upper casing surface 76 to the upper casing surface 76 side of the upper casing 73. .

  The impact mitigating member 72 is made of rubber or the like, and is formed at an upper portion on a substantially square so as to surround a region where the main display portion 62, the ion generation voltage up key 67, the ion generation voltage down key 68, and the ion ejection portion 69 are disposed. It is fixed on the periphery of the housing surface 76. For example, the area can be considered as a rectangular area. The shock relaxation member 72 has a U-shape, and the three sides of the region are surrounded by the shock relaxation member 72 and the other side is surrounded by the member of the rotation mechanism 71.

  Then, when the cellular phone device 60 is closed (folded), as shown in FIGS. 9A and 9B, the impact relaxation member 72 is brought into close contact with the peripheral portion of the lower housing surface 77. As a result, the substantially rectangular parallelepiped space surrounded by the upper housing surface 76, the lower housing surface 77, the impact mitigating member 72, and the members of the rotating mechanism 71 is sealed. In this space, the main display section 62 on the upper casing surface 76 side, the ion generation voltage up key 67, the ion generation voltage down key 68 and the ion ejection section 69, the operation key 61 on the lower casing surface 77 side, the fingerprint sensor 64, a position selection key 65 and an ion generation operation mode setting key 66 are included. Of course, when the cellular phone device 60 is opened, the space is opened.

  Further, the impact relaxation member 72 may be formed in a square shape (not shown) instead of a square shape. That is, when the mobile phone device 60 is closed, the U-shaped impact mitigating member 72 is brought into close contact with the peripheral portion of the lower casing surface 77, so that the U-shaped impact mitigating member 72 and the upper casing surface are The space may be sealed by 76 and the lower housing surface 77 (without depending on the member of the rotating mechanism 71).

  FIG. 10 shows a functional block diagram of the mobile phone device 60. 8A and 8B, FIGS. 9A and 9B, and FIG. 10, the same parts are denoted by the same reference numerals. The cellular phone device 60 further includes a control unit 80, an antenna 81, a wireless communication unit 82, a storage unit 83, and a voice input / output unit 84 in addition to the parts described with reference to FIG. The control unit 80 can recognize whether the cellular phone device 60 is closed or open by using a switch (not shown) that is turned on / off according to the opening / closing operation of the cellular phone device 60.

  As described above, the operation of the mobile phone device 60 will be described assuming that the ion generator 70 is the composite ion generator 44 of FIG. When the mobile phone device 60 shifts from the standby state to an operation state in which calls and imaging can be performed (that is, when the mobile phone device 60 shifts from the closed state to the open state), the ion output of the ion generator 70 from the controller 80 A control signal for generating negative ions is sent to the control unit 43 (FIG. 7). As a result, the power source of the negative ion generator 41 (FIG. 7) is turned on (that is, the DC voltage V1 is supplied to the power supply line L1 of FIG. 3 to enter the negative ion generation mode), and negative ions are emitted from the ion ejection part 69. Sent out.

  In the operation state of the mobile phone device 60, the mobile phone device 60 is open as shown in FIGS. 8 (a) and 8 (b). In the standby state of the mobile phone device 60, the mobile phone device 60 is closed as shown in FIGS. 9 (a) and 9 (b).

  When negative ions are sent out for a predetermined time, a control signal for stopping the generation of negative ions is sent from the control unit 80 to the ion output control unit 43 (FIG. 7) of the ion generator 70. As a result, the power supply of the negative ion generator 41 is turned off (that is, the supply of the DC voltage V1 to the power supply line L1 in FIG. 3 is interrupted), and the generation of negative ions is stopped. As will be described later, positive ions are generated with the cellular phone device 60 closed, but since the positive ions are neutralized by the negative ions when the cellular phone device 60 is opened, the operator can feel refreshed. (Discomfort is suppressed). In addition, bacteria floating around the mobile phone device 60 can be sterilized by negative ions. Even when the cellular phone device 60 is used in the presence of many people, it can be used while being refreshed by negative ions.

  As described above, the negative ion generator 41 is turned off when a predetermined time has elapsed after shifting from the standby state to the operation state. However, after the transition from the standby state to the operation state, the negative ions are continuously sent out. It doesn't matter if you do. In this case, for example, the power source of the negative ion generator 41 is shifted from on to off when the cellular phone device 60 is again in a standby state (standby state) and folded.

  In order to enhance the sterilizing effect, ozone may be generated together with the negative ions, and the ozone may be sent out from the ion ejection unit 69. However, the amount of ozone generated is appropriately controlled in consideration of the odor of ozone and the adverse effects of a large amount of ozone on the human body.

  When the mobile phone device 60 shifts from the operating state to the standby state (that is, when the mobile phone device 60 shifts from the open state to the closed state), the ion output control unit 43 of the ion generator 70 (see FIG. 7), a control signal for generating positive ions is sent. As a result, the power source of the positive ion generator 42 (FIG. 7) is turned on (that is, the DC voltage V1 is supplied to the power supply line L1 in FIG. Sent out. At this time, it is desirable to generate ozone together with the positive ions and to send both out from the ion ejection part 69.

  When a predetermined time elapses, the power source of the positive ion generator 42 is switched from ON to OFF, and the positive ion generator 42 shifts to an ion generation stop mode in which the operations of both the negative ion generator 41 and the positive ion generator 42 are stopped. In addition, you may make it continue sending out from the ion ejection part 69 of plus ion or plus ion and ozone until the mobile telephone apparatus 60 transfers to the state opened again.

  When the cellular phone device 60 is closed (folded), ozone is supplied to the sealed space including the operation keys 61 and the like, so that ozone is confined in the space for a longer time than when the cellular phone device 60 is not sealed. . As a result, the bactericidal effect by ozone lasts for a long time, and an effective bactericidal action is obtained. Therefore, when the mobile phone device 60 is carried around and used by a plurality of operators, or when the mobile phone device 60 is used in a place such as a medical institution that requires special hygiene considerations, the convenience is improved. Can do.

  The positive ions have an effect of electrically neutralizing dust and dirt attached to the operation key 61 and the like by being negatively charged and easily removing the dust. For this reason, dust or the like can be easily removed by supplying positive ions to the sealed space with the cellular phone device 60 closed (folded state).

  Further, when positive ions are generated, the generation status may be displayed on the sub display unit 63, and when negative ions are generated, the generation status may be displayed on the main display unit 62. Thereby, the operator can confirm the condition of ion generation.

  When the mobile phone device 60 is switched from the operating state (open state) to the standby state (closed state), if the negative ion generator 41 is turned on, first, the negative ion generator After the power source 41 is turned off, the positive ion generator 42 is turned on.

  Further, when the mobile phone device 60 shifts from an open state to a closed state, or when the mobile phone device 60 is closed, the negative ion generator 41 is turned on to turn negative ions or negative ions on. And ozone may be sent out from the ion ejection part 69. Since negative ions also have a bactericidal effect, an effective bactericidal action can be obtained in this way.

  Further, the ion generator 70 may be replaced with an ozone generator (not shown). Then, when the mobile phone device 60 shifts from the open state to the closed state, or when the mobile phone device 60 is closed, the ozone generated by the ozone generator is sent out from the ion ejection unit 69. Even in this way, an effective bactericidal action can be obtained. The ozone generator or ion generator 70 functions as a high voltage product generator. In addition, since the structure of the said ozone generator is a well-known structure, description is omitted.

  Hereinafter, the configuration and function of each part of the mobile phone device 60 will be described.

  The operation key 61 is composed of a plurality of button type input keys representing numbers and alphabets. The position selection key 65 is formed of a so-called cross key of a button type that represents four directions, up, down, left, and right. The operator inputs necessary information (telephone number and the like) for operating the mobile phone device 60 through the operation key 61 using the position selection key 65.

  The main display unit 62 is a display device for displaying image information that the mobile phone device 60 has. The image information is, for example, image information transmitted from the outside and received by the mobile phone device 60, image information obtained by imaging by the imaging unit 75, or image information such as a function menu of the mobile phone device 60.

  The sub display unit 63 is for supplementing the display function of the main display unit 62. For example, the sub display unit 63 displays the time and calendar in a waiting state for incoming calls when the cellular phone device 60 is folded, and the other party's telephone number and mail address are displayed when an incoming call is received. In order to reduce power consumption, the display of the sub display unit 63 is usually darker than the main display unit 62, and the display operation is stopped when a predetermined time elapses from the display start of the sub display unit 63. Is controlled.

  Various display devices such as a liquid crystal display device, a plasma display display device, and an LED (Light Emitting Diode) display device can be used as the main display unit 62 and the sub display unit 63. However, low power consumption and miniaturization are possible. From this point of view, it is desirable to adopt a liquid crystal display device.

  The fingerprint sensor 64 is composed of a solid-state imaging device such as a CCD (Charge Coupled Devices) imager and a CMOS (Complementary Metal Oxide Semiconductor) imager, an element for reading a change in capacitance, and the like. Read the fingerprint. The fingerprint sensor 64 performs identity verification by so-called biometric authentication, and maintains operational security. That is, the specific function of the mobile phone device 60 can be used only when the fingerprint read by the fingerprint sensor 64 matches the registered fingerprint (registrant's fingerprint).

  When the fingerprint is read by the fingerprint sensor 64, the temperature of the part touched by the finger having the fingerprint (for example, the surface temperature of the fingerprint sensor 64) may be measured. When the temperature is out of a certain range, the authentication result is disabled regardless of the fingerprint verification result (that is, the use of the specific function is not permitted). As a result, it is possible to prevent “spoofing” caused by taking a registrant's fingerprint and forging it, and “spoofing” using a cut registrant's finger.

  The ion generation operation mode setting key 66 is a key for performing a series of operations for causing the mobile phone device 60 to function as an ion generation device. When the ion generation operation mode setting key 66 is first pressed, the cellular phone device 60 is set to an operation mode that functions as an ion generation device. Specifically, the ion generator 70 operates and ions (negative ions or positive ions) are emitted from the ion ejection unit 69. Next, when the ion generation operation mode setting key 66 is pressed, the operation of the ion generator 70 is stopped, and the emission of ions (negative ions or positive ions) from the ion ejection portion 69 is stopped.

  The ion generation voltage up key 67 and the ion generation voltage down key 68 set the maximum voltage in the absolute value of the high voltage applied to the ion generation element 5 (see FIG. 3 etc.) within the breakdown voltage range of the components of the ion generator 70. It is a key for adjustment. Specifically, when the ion generation voltage up key 67 is pressed, the above-mentioned V1 increases in proportion to the number of presses, and thus the maximum voltage increases. When the ion generation voltage down key 68 is pressed, the maximum voltage increases. As the above-described V1 decreases, the maximum voltage decreases. When the maximum voltage is set low, the amount of ions generated is reduced, but the power consumption is suppressed.

  The imaging unit 75 receives an optical image representing a subject via a lens (not shown), converts the optical image into an electrical signal, and outputs the electrical signal to an internal circuit, and functions as a so-called digital camera. Image information (image data) obtained by imaging by the imaging unit 75 is recorded in the storage unit 83 and reused as necessary.

  The wireless communication unit 82 (see FIG. 10) is for performing wireless communication with another mobile phone device or the like via radio waves at an external base station or the like. The wireless communication unit 82 transmits and receives radio waves via the antenna 81. The recording unit 83 stores information obtained by wireless communication, a control program built in the mobile phone device 60 in advance, information input from contact-type information input means such as the operation keys 61, and the like. The voice input / output unit 84 is a voice input / output unit for making a call.

  Although the mobile phone device is shown as an example of the electronic device in the fourth embodiment, the ion generator according to the first to third embodiments can be applied to various electronic devices (particularly, portable electronic devices). In particular, the ion generator according to the present invention is suitable for a small portable electronic device because it has features of low cost, light weight, and high reliability (impact resistance). The contents shown in the fourth embodiment can be applied to various electronic devices such as an electronic thermometer device and an overheating cooker (microwave oven, etc.), and by this application, an effective sterilization effect contributing to hygiene maintenance Can be obtained.

<< Fifth Embodiment >>
5th Embodiment shows the example which applied the ion generator which concerns on this invention to the thermometer apparatus. 11 and 12 are perspective views of the thermometer device 90 according to the present embodiment. FIG. 11 shows a state in which the lid 93 of the thermometer container is opened, and FIG. 12 shows a state in which the lid 93 is closed.

  A thermometer device 90 includes a thermometer body 91 for measuring body temperature, a thermometer housing body 92, a thermometer housing lid 93, a housing detection sensor 94, a high voltage output device 95, an ion generating element 96, It is comprised. The thermometer housing main body 92 and the lid 93 constitute a thermometer housing for housing the thermometer main body 91. Inside the thermometer housing main body 92, a housing detection sensor 94, a high voltage output device 95, and an ion generating element 96 are provided.

  The thermometer housing main body 92 is a box-like body in which a space for housing the thermometer main body 91 is secured, and one surface is open. The lid 93 is also a box-like body in which a space for housing the thermometer main body 91 is secured, and one surface is open. The thermometer housing main body 92 and the lid 93 are formed by fitting the open surfaces of the thermometer housing main body 92 and the lid 93 as shown in FIG. 12 (that is, by closing the lid 93). The thermometer main body 91 can be accommodated in the space that is substantially blocked from the outside air.

  The space formed by the thermometer housing main body 92 and the lid 93 by closing the lid 93 is hereinafter referred to as a thermometer housing space. The thermometer storage space is hermetically sealed by closing the lid 93, and is opened to the outside air by opening the lid 93 (that is, by disengaging the thermometer housing main body 92 and the lid 93). .

  When the lid 93 is closed with the thermometer main body 91 inserted into the thermometer housing main body 92, one surface of the thermometer main body 91 is pushed by the lid 93, and the other surface of the thermometer main body 91 applies pressure to the storage detection sensor 94. The storage detection sensor 94 is pushed in by the pressure, and turns on a switch (not shown) between a battery (not shown) built in the thermometer housing body 92 and the high voltage output device 95. That is, the output voltage of the battery is supplied to the high voltage output device 95 as a power supply voltage.

  The high voltage output device 95 and the ion generating element 96 constitute the ion generator described in any one of the first to third embodiments, and the high voltage output device 95 is changed from the ion generator to the ion generating element 5. It corresponds to the thing except. The ion generating element 96 is the same as the ion generating element 5 shown in the first to third embodiments. When the output voltage of the battery is applied to the high voltage output device 95, the ion generator including the high voltage output device 95 and the ion generating element 96 is turned on, and a high voltage of pulsating current is generated from the high voltage output device 95. To do. The high voltage of the pulsating flow is applied to the ion generating element 96, and ions are generated from the ion generating element 96.

  For example, when the ion generator composed of the high voltage output device 95 and the ion generating element 96 is the negative ion generator shown in the first embodiment, negative ions, or negative ions and ozone are ion generating elements 96. Arising from. When the ion generator composed of the high voltage output device 95 and the ion generation element 96 is the positive ion generator shown in the second embodiment, positive ions, or positive ions and ozone are generated from the ion generation element 96. To do.

  It is also possible to replace the high voltage output device 95 and the ion generating element 96 with an ozone generator that generates ozone. In this case, the ozone generator operates using the output voltage of the battery supplied from the battery when the lid 93 is closed as a power supply voltage to generate ozone.

  Products (ions and / or ozone) generated from the ion generating element 96 are released into the thermometer storage space. Since the thermometer storage space is sealed, the product fills the thermometer storage space in which the thermometer main body 91 is stored. For this reason, sterilization etc. are performed efficiently.

  When the lid 93 is opened, the voltage supply from the battery is cut off, the operation of the high voltage output device 95 is turned off, and the generation of the product is stopped.

<< Deformation, etc. >>
The first to fifth embodiments described above can be freely combined as long as there is no contradiction.

  In the fourth embodiment, it is possible to employ ion generators having various known circuit configurations. That is, for example, an ion generator including a known high voltage output device that obtains a high voltage necessary for ion generation using a transformer can be employed as the ion generator 70. Also in the fifth embodiment, such an ion generator can be employed as an ion generator including the high voltage output device 95 and the ion generating element 96. However, in consideration of cost, lightness, reliability, and the like, it is desirable to employ the ion generator shown in the first to third embodiments as the ion generator.

  Further, a known oscillation circuit that generates a square wave from a DC power supply voltage and outputs the AC voltage generation circuit 1 in the first embodiment (FIG. 3) and the AC voltage generation circuit 1a in the second embodiment (FIG. 5). Instead of (not shown), a square wave voltage that is an output voltage of the oscillation circuit may be applied as an AC voltage to the high voltage generation circuit 2 or the high voltage generation circuit 2a.

1 is an overall block diagram of an ion generator according to a first embodiment of the present invention. It is a figure which shows the example of 1 structure of the power supply control part 6 of FIG. It is a circuit block diagram of the ion generator of FIG. It is a timing chart showing the voltage waveform of each terminal of FIG. It is a circuit block diagram of the ion generator which concerns on 2nd Embodiment of this invention. It is a timing chart showing the voltage waveform of each terminal of FIG. It is a block diagram of the composite ion generator which concerns on 3rd Embodiment of this invention. FIG. 8 is a perspective view of a mobile phone device according to a fourth embodiment of the present invention, and is a front perspective view (a) and a back perspective view (b) of the mobile phone device in an opened state. It is the perspective view of the mobile telephone apparatus which concerns on 4th Embodiment of this invention, and is the side view (a) and top view (b) of a mobile telephone apparatus in the state which closed the mobile phone apparatus. FIG. 10 is a functional block diagram of the mobile phone device of FIGS. 8 and 9. It is a perspective view of the thermometer device concerning a 5th embodiment of the present invention (state where a lid was opened). It is a perspective view of the thermometer device concerning a 5th embodiment of the present invention (state where a lid was closed). It is a circuit diagram of the high voltage generation circuit in the conventional negative ion generator.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1a AC voltage generation circuit 2, 2a High voltage generation circuit 3, 3a Voltage addition circuit 4 Control apparatus 5 Ion generation element 6 Power supply control part 7 Ion generation voltage output control part 8 Main control part Q11-Q14, Q21, Q21a Transistor D30 to D38 Rectifier diode C30 to C38 Smoothing capacitor D11, D12 Diode (Diode for preventing reverse bias)
R11, R12 resistance (Reverse bias prevention resistance)
L1 power line L2 ground line 41 negative ion generator 42 positive ion generator 43 ion output control unit 44 complex ion generator 60 mobile phone device 61 operation key 62 main display unit 63 sub display unit 64 fingerprint sensor 65 position selection key 66 ion Generation operation mode setting key 67 Ion generation voltage up key 68 Ion generation voltage down key 69 Ion ejection part 70 Ion generator 71 Rotating mechanism 72 Impact mitigating member 73 Upper casing 74 Lower casing 75 Imaging section 76 Upper casing surface 77 Lower section Case surface 80 Control unit 81 Antenna 82 Wireless communication unit 83 Storage unit 84 Voice input / output unit 90 Thermometer device 91 Thermometer main body 92 Thermometer container main body 93 Lid 94 Storage detection sensor 95 High voltage output device 96 Ion generating element

Claims (18)

AC voltage generating means for generating an AC voltage from a DC power supply voltage;
A booster circuit that boosts the AC voltage while sequentially rectifying the AC voltage over a plurality of stages;
A voltage adding circuit that outputs a high voltage of a pulsating current from the boosting circuit by intermittently applying a predetermined pulsating current generation voltage to any voltage output point of the boosting circuit;
A high voltage output device comprising: The AC voltage generating means includes a first series circuit configured to include a first switching element and a third switching element interposed in series between a power supply line to which the power supply voltage is applied and a reference potential line; A second series circuit configured to include a second switching element and a fourth switching element interposed in series between the power supply line and the reference potential line,
When the first to fourth switching elements are controlled to be turned on / off, the first connection midpoint between the first switching element and the third switching element, the second switching element, and the fourth switching element The high-voltage output device according to claim 1, wherein a pulsed AC voltage is generated as the AC voltage between the second connection midpoint. 3. The first connection middle point and the second connection middle point are opened when the voltage adding circuit applies the pulsating current generation voltage to the voltage output point. A high-voltage output device as described in 1. The AC voltage generation means is configured such that when the voltage adding circuit applies the pulsating current generation voltage to the voltage output point, a voltage applied to the first connection middle point is a first or third reverse bias voltage. A voltage applied to the second connection midpoint when the voltage adding circuit applies the pulsating current generation voltage to the voltage output point is not applied to the switching element. 4. The high voltage output device according to claim 3, further comprising reverse bias prevention means for preventing the fourth switching element from being applied. The high-voltage output device according to any one of claims 1 to 4, wherein an amplitude of the high-voltage pulsating flow is 600 V or more. The booster circuit is composed of a voltage doubler rectifier circuit composed of a plurality of rectifying diodes and a plurality of smoothing capacitors, and the voltage output point to which the voltage adding circuit applies the pulsating current generation voltage is: 6. The high-voltage output device according to claim 1, wherein the high-voltage output device is one of connection points between adjacent smoothing capacitors or an output terminal of the booster circuit. An ion generator comprising the high voltage output device according to any one of claims 1 to 6. The high voltage output device outputs a negative high voltage as the high voltage of the pulsating flow,
The ion generator according to claim 7, wherein the ion generator generates negative ions using the negative high voltage. The high voltage output device outputs a positive high voltage as the high voltage of the pulsating flow,
The ion generator according to claim 7, wherein the ion generator generates positive ions using the positive high voltage. Two high-voltage output devices according to any one of claims 1 to 6 are provided,
One high voltage output device can be configured to output a negative high voltage as the high voltage of the pulsating current, and the other high voltage generator can output a positive high voltage as the high voltage of the pulsating current Make
An ion generator further comprising output control means for controlling an output timing of the negative high voltage and the positive high voltage. The output control means selectively selects an operation mode of the ion generator from a plurality of operation modes by controlling the two high-voltage output devices,
The plurality of operation modes include a first operation mode for outputting the negative high voltage and stopping the positive high voltage output, and stopping the negative high voltage output and the positive polarity. 11. The second operation mode for outputting a high voltage of the second and the third operation mode for stopping the output of both the negative high voltage and the positive high voltage are included in claim 10. The ion generator as described. An electronic apparatus comprising the ion generator according to any one of claims 7 to 11. Contact-type information input means for inputting information by direct contact with a person;
The electronic apparatus according to claim 12, further comprising display means. 14. The electronic apparatus according to claim 13, wherein the contact-type information input means includes at least one of biometric information input means for accepting input of biometric information as the information and key input means. 14. The electronic device according to claim 12, further comprising a wireless communication unit for performing wireless communication. The thermometer body,
In a thermometer device comprising a thermometer housing for housing the thermometer body,
A thermometer device comprising the ion generator according to any one of claims 7 to 11 provided in the thermometer housing. A high voltage output device according to any one of claims 1 to 6, wherein the high voltage output device outputs a high voltage of the pulsating flow, thereby allowing positive ions, negative ions, positive ions and ozone, Or a high voltage product generator capable of generating negative ions and ozone as high voltage products;
Contact-type information input means for inputting information by direct contact with a person;
A housing,
The housing is configured to be capable of sealing and opening a space including a portion that a person directly contacts to input the information,
The high-voltage product generator supplies the high-voltage product into the space when the space is sealed. The thermometer body,
In a thermometer device comprising a thermometer housing for housing the thermometer body,
A high-voltage output device according to any one of claims 1 to 6, wherein the high-voltage output device outputs a high voltage of the pulsating flow, whereby positive ions, negative ions, positive ions and ozone, Or a high voltage product generator capable of generating negative ions and ozone as a high voltage product is provided in the thermometer housing,
The thermometer device, wherein the high-voltage product generator supplies the high-voltage product to a space that houses the thermometer main body.

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