JP2007167340A - Catalytic deodorizing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a catalytic deodorizing device capable of preventing the damage to electrodes caused by spark discharge from occurring. <P>SOLUTION: The discharge type photocatalytic deodorizing device 1 is equipped with a catalytic reaction device 9 mounted with photocatalysts 15, 15 between electrodes 16 generating ultraviolet ray and ozone, an ozonolysis catalyst 10 for decomposing ozone, and a fan motor 8 allowing passage of a gas from the catalytic reaction device 9 to the ozonolysis catalyst 10, and further a spark discharge detecting means 21 for detecting spark discharge of the catalytic reaction device 9 and a control means for operating the catalytic reaction device 9 with a second high voltage by using the spark discharge detection of the spark discharge detecting means 21. With the above constitution, even if spark discharge occurs in the catalytic reaction device 9, the generation of consecutive spark discharge is prevented by operating the catalytic reaction device 9 with the second high voltage, so that the damage to electrodes caused by spark discharge can be prevented before its occurrence. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a discharge-type catalyst deodorization apparatus that excites a catalyst by discharge between discharge electrodes, thereby deodorizing a fluid and decomposing an organic substance.

  Conventionally, this type of so-called catalyst deodorization apparatus is configured such that a catalyst is sandwiched between a pair or a plurality of electrodes constituting a catalyst reaction apparatus, and the catalyst is excited by a discharge between the electrodes constituting the counter electrode, so that an odor in the fluid is obtained. It is designed to break down the organic matter that is the source of.

As a result, in this catalyst deodorization device, the fluid is taken into the device by the flow feeding device, and the substance that is the source of the odor in the fluid, that is, the organic substance, is decomposed by the catalyst in the catalyst reaction device, and the deodorizing effect is produced together with the reaction of the catalyst. (For example, refer patent document 1).
JP 2005-13383 A

  However, in such a catalyst deodorizing apparatus, when the catalytic reaction apparatus is operated in an extremely high temperature and high humidity state, or when a large amount of dust or the like remains in the catalytic reaction apparatus, spark discharge may occur in the catalytic reaction apparatus. When this spark discharge continues to occur for a long time, there has been a problem that the electrode of the catalytic reaction apparatus is worn out, or is lost or blown, and the electrode is damaged.

  An object of this invention is to provide the catalyst deodorizing apparatus which can prevent beforehand the damage of the electrode by spark discharge in view of the said problem.

  In the catalyst deodorizing apparatus according to the first aspect of the present invention, when the detection means detects the spark discharge, the catalytic reaction apparatus is operated at a predetermined voltage value, and therefore, the continuous spark discharge can be prevented.

  The catalyst deodorization apparatus according to claim 2 of the present invention stops the operation of the catalyst reaction apparatus when the detection means again detects the spark discharge during operation at a predetermined voltage value after the detection means detects the spark discharge, for example. Therefore, it is possible to prevent the occurrence of the spark discharge many times during the operation at the predetermined voltage value, thereby further reliably preventing the occurrence of the continuous spark discharge. Further, it is possible to make the user recognize by the operation of the warning means that spark discharge occurs even when the catalytic reaction apparatus is operated at a predetermined voltage value.

  In the catalyst deodorization apparatus according to claim 3 of the present invention, when the detection means detects the spark discharge, the operation of the catalyst reaction apparatus is switched to the second voltage value lower than the first voltage value so far. Thus, it is more difficult for spark discharge to occur more reliably than when the catalytic reactor is operated at a voltage value of.

  The catalyst deodorization device according to claim 4 of the present invention shifts to the operation of the catalyst reaction device with the second voltage value when the detection means detects a predetermined number of spark discharges during the operation with the first voltage value, When the detection means further detects a predetermined number of spark discharges during the operation of the second voltage value, the operation as the apparatus is stopped and the warning means is operated. It is possible to reduce the occurrence of frequent stoppages.

  In the catalyst deodorization apparatus according to claim 5 of the present invention, when the detection means detects a spark discharge during the operation with the first voltage value or the second voltage value, the catalyst reaction is performed by operating only the flow sending device. A part of the dust accumulated in the apparatus can be removed by sending, and if the cause of the spark discharge is condensation due to high temperature, the condensation is removed by sending and it is possible to form an environment in which spark discharge is difficult to occur. In addition, since the spark discharge detection is performed a plurality of times before the operation of the device is stopped and the alarm means is operated, the occurrence of continuous spark discharge is prevented in a situation where spark discharge is likely to occur, and as a device It is possible to remarkably reduce the occurrence of frequent stoppages.

  According to the catalyst deodorization apparatus of claim 1 of the present invention, it is possible to prevent the occurrence of continuous spark discharge and prevent the electrode from being damaged by the spark discharge.

  According to the catalyst deodorizing apparatus of claim 2 of the present invention, it is possible to more reliably prevent the electrode from being damaged by the spark discharge and to notify the user of an alarm.

  According to the catalyst deodorizing apparatus of claim 3 of the present invention, it is possible to achieve a stable operation of the catalytic reaction apparatus.

  According to the catalyst deodorizing apparatus of claim 4 of the present invention, it is possible to remarkably reduce occurrence of frequent stoppage of the apparatus due to spark discharge.

  According to the catalyst deodorization apparatus of claim 5 of the present invention, it is possible to prevent the occurrence of continuous spark discharge in a situation where spark discharge is likely to occur, and to significantly reduce the occurrence of frequent operation stop as the apparatus. it can.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

  1 to 5 show a first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a discharge photocatalyst deodorization apparatus as a catalyst deodorization apparatus according to the present invention. A housing 2 that forms an outer shell by combining these resin molded parts is provided, and can be operated by being supplied with power from a power source via a power connector 3. An intake port 4 is formed in the upper surface 2 </ b> A of the housing 2, and an exhaust port 5 communicating with the intake port 4 is formed in one side surface 2 </ b> B of the housing 2. Yes.

  In practice, the housing 2 has a PC (printed circuit) board 6 on which various circuit elements such as a spark discharge detecting means, which will be described later, are mounted as shown in FIG. A wind tunnel 7 communicating with the mouth 5 is formed, and a fan motor 8 driven by fan motor driving means described later is provided in the wind tunnel 7. A catalyst reaction device 9 and an ozone decomposition catalyst 10 for decomposing and removing ozone in the downstream side of the catalyst reaction device 9 are sequentially arranged on the exhaust side of the fan motor 8 as a flow sending device for moving fluid, that is, air. Thus, by rotating the fan motor 8, the air to be deodorized sucked from the intake port 4 sequentially passes through the catalyst reaction device 9 and the ozone decomposition catalyst 10, and is discharged from the exhaust port 5 to the outside of the housing 2. It has come to be.

  As shown in FIG. 3, the catalytic reactor 9 includes a high-voltage generating power source 14 that generates a first high voltage (first voltage) and a second high voltage (second voltage) of several KV, The positive electrode 16 is disposed between the pair of photocatalysts 15 and 15, and the counter electrode 17 and 17 is a negative electrode disposed so as to sandwich the electrode 16 and the photocatalysts 15 and 15. In this case, the positive lead terminal 18 of the high voltage generating power supply 14 is connected to the electrode 16, and the negative lead terminal 19 of the high voltage generating power supply 14 is connected to the counter electrodes 17 and 17 to generate high voltage. Either the first high voltage value or the second high voltage value from the power supply 14 can be applied between the electrode 16 that is the discharge device and the counter electrodes 17 and 17. Thus, between the electrode 16 on both sides of the photocatalysts 15 and 15 and the counter electrodes 17 and 17, the insulation of air is partially broken to cause corona discharge, which can generate ultraviolet rays and ozone. .

  Here, the discharge photocatalyst deodorization apparatus 1 includes a control means 20 having a CPU (Central Processing Unit) configuration for comprehensively controlling the discharge photocatalyst deodorization apparatus 1 as shown in FIG. A spark discharge detection means 21 for detecting the spark discharge of the catalytic reaction device 9 is connected to the input port of the control means 20, and the spark discharge of the spark discharge detection means 21 is connected to the output port of the control means 20. In response to the detection, a voltage variable means 22 for changing the voltage to the high voltage generating power supply 14 by a command signal from the control means 20 and a fan motor driving means 23 for driving the fan motor 8 are connected to each other. Then, the voltage variable means 22 gives the first high voltage value or the second high voltage value from the high voltage generating power supply 14 between the electrode 16 and the counter electrodes 17 and 17, and also the fan motor driving means 23. Thus, the fan motor 8 is configured to be driven.

  When the spark discharge detecting means 21 detects the spark discharge, the control means 20 sets the second high voltage value lower than the first high voltage value before detecting the spark discharge so far to the electrode 16 and the counter electrodes 17, 17. And a spark discharge prevention control means 31 for operating the catalytic reaction device 9. In this case, the first high voltage value is, for example, 7.8 kV, and the second high voltage value is, for example, 6.8 kV. The high voltage generating power source 14 is provided on the PC board 6 as a circuit including a high voltage transformer, and the control means 20 is incorporated in the PC board 6 as a circuit including a microcomputer.

  Next, the operation of the above configuration will be described with reference to the flowchart of FIG. When the power connector 3 is connected to the nearest power source (not shown) and a predetermined voltage is applied to the PC board 6, the procedure proceeds from the start step of the routine RT1 of FIG. 5 to the procedure of step SP1. In this step SP1, the fan motor 8 is activated in response to a command from the control means 20 to the fan motor driving means 23, and air containing odor components is supplied from the intake port 4 to the prefilter (not shown) and the fan motor 8. And is fed into the catalytic reactor 9. At the same time, in response to a command signal from the control means 20, a predetermined high voltage is generated from the high voltage generating power source. When this predetermined high voltage is applied between the electrode 16 and the counter electrodes 17 and 17, the air insulation is partially broken and corona discharge occurs. When corona discharge occurs, ultraviolet rays and ozone are generated, and the photocatalysts 15 and 15 of the catalytic reaction device 9 are excited by the ultraviolet rays, and the odor component that is the source of the odor in the air is excited by the photocatalyst 15. , 15.

  On the other hand, ozone generated by discharge also oxidizes and decomposes odor components. Both ozone and odor components flow downstream of the wind tunnel 7, and the odor components are oxidatively decomposed by ozone in the air or adsorbed by the ozone decomposition catalyst 10 on the downstream side of the catalytic reactor 9, where odor components and the like are present. Oxidative decomposition with ozone. In this way, the air containing the odor component is gradually purified in the housing 2. Excess ozone is adsorbed by the ozone decomposition catalyst 10 and then reacted with each other to be discharged as oxygen. Thus, the air from which the odor component is removed is discharged to the outside from the exhaust port 5 on the one side surface 2B of the housing 2.

  Returning to step SP1 in FIG. 5 again, in this embodiment, the spark discharge prevention control means 31 constituting the control means 20 generates a command signal so that the first high voltage value is generated from the high voltage generating power supply 14 in the normal state. Is output. In this case, a first high voltage (for example, 7.8 kV) that causes the above-described corona discharge is applied from the high voltage generating power source 14 between the electrode 16 and the counter electrodes 17 and 17.

  By the way, for example, when a large amount of dust or the like is accumulated in the catalytic reaction device 9 or when condensation is attached to the catalytic reaction device 9 due to high humidity, it becomes easy to discharge, thereby reducing the starting voltage of spark discharge. As a result, spark discharge may occur even at a voltage in the corona discharge region. When a spark discharge occurs, the entire path is destroyed as compared with the corona discharge of the partial dielectric breakdown until then, and the value of the current flowing through the high-voltage generating power supply 14 is significantly changed.

  Here, the spark discharge detecting means 21 constantly measures the value of the current flowing from the high voltage generating power source 14 to the electrode 16, and when it is detected in step SP2 that this current value has changed significantly, a spark discharge is generated. An output signal S1 to the effect is sent to the control means 20. As a result, the control means 20 sends a second high voltage value (for example, 6.8 kV) lower than the first high voltage value to the voltage variable means 22 from the high voltage generating power supply 14 to the electrode 16 and the counter electrode 17. A command signal for switching so as to be applied between the two is transmitted (step SP3). Then, in the next step SP4, the operation as the spark discharge prevention control means 31 is terminated.

  Here, since the second high voltage value is selected to be lower than the first high voltage value, a spark discharge is generated as compared with the case where the catalytic reaction device 9 is operated at the first high voltage value. It will be difficult. Thus, between the electrode 16 on both sides of the photocatalysts 15 and 15 and the counter electrodes 17 and 17, the insulation of air is partially broken again to cause corona discharge, which can generate ultraviolet rays and ozone. Yes. That is, when a spark discharge occurs, the first high voltage value applied to the catalytic reaction device 9 is automatically switched to the second high voltage value lower than the first high voltage value, and the catalytic reaction device 9 is switched. By operating, it is possible to prevent the occurrence of a spark discharge for a long time, and as a result, it is possible to prevent the electrode 16 from being worn, broken, or blown by a continuous spark discharge.

  Further, in the discharge photocatalyst deodorization apparatus 1, the catalytic reaction apparatus 9 is operated at the second high voltage, so that the spark discharge is prevented from occurring in the catalytic reaction apparatus 9, and the electrode 16 is directly counter electrode. The photocatalysts 15 and 15 can be continuously excited between 17 and 17, and thus the catalytic reactor 9 can be stably operated.

  Incidentally, in the discharge type photocatalyst deodorizing apparatus 1 in which spark discharge is generated due to accumulation of dust or the like in the catalyst reaction apparatus 9, generation of spark discharge is performed by performing maintenance such as removing dust from the catalyst reaction apparatus 9. If the cause is eliminated, the catalytic reactor 9 can be operated again at the first high voltage.

  As described above, in this embodiment, the catalytic reaction device 9 in which the photocatalysts 15 and 15 are arranged between the electrode 16 for generating ultraviolet rays and ozone and the counter electrodes 17 and 17, and the ozone decomposition catalyst 10 for decomposing ozone. And a discharge photocatalyst deodorizing apparatus 1 having a fan motor 8 that allows gas to pass from the catalytic reaction apparatus 9 to the ozone decomposition catalyst 10, spark discharge detection means 21 as detection means for detecting the spark discharge of the catalytic reaction apparatus 9. And a control means 20 for operating the catalyst reaction device 9 at a second high voltage value which is a predetermined high voltage value when the spark discharge detection means 21 detects the spark discharge.

  In this way, when the spark discharge detecting means 21 detects the spark discharge, the catalytic reaction device 9 operates at a predetermined high voltage value, so that it is possible to prevent the occurrence of continuous spark discharge, and thus the electrode due to the spark discharge. Damage can be prevented beforehand.

  The predetermined high voltage value is set to a second high voltage value lower than the first high voltage value before the spark discharge detecting means 21 detects the spark discharge. In this way, when the spark discharge detecting means 21 detects the spark discharge, the operation of the catalytic reaction device 9 is switched to the second high voltage value lower than the first high voltage value so far. Thus, it is more difficult for the spark discharge to occur more reliably than when the catalytic reaction device 9 is operated, and continuous spark discharge can be prevented.

  FIGS. 6 to 9 show a second embodiment of the present invention. Common portions with the first embodiment are denoted by common reference numerals, and description of common portions is omitted as much as possible to avoid duplication. In FIG. 6, in which parts corresponding to those in FIG. 1 are assigned the same reference numerals, 51 denotes a discharge photocatalyst deodorization device as a catalyst deodorization device according to the present invention. A warning LED (Light Emitting Diode) 52 is provided in 2A. Further, as shown in FIG. 7 where parts corresponding to those in FIG. 2 are assigned the same reference numerals, a PC board 53 on which various circuit elements different from those in the first embodiment are mounted is provided inside the housing 2. It is designed to be able to perform its own spark discharge prevention process. In addition, the structure of each part other than that is common in 1st Example including the catalytic reaction apparatus 9, for example.

  8, the discharge photocatalyst deodorization apparatus 51 is configured to control a central processing unit (CPU) that controls the discharge photocatalyst deodorization apparatus 51 in an integrated manner. Means 20 are provided. As in the first embodiment, a spark discharge detecting means 21 for detecting the spark discharge of the catalytic reaction device 9 is connected to the input port of the control means 20, and a fan is connected to the output port of the control means 20 In addition to the motor drive means 23, a warning LED 52 as a warning means, and a power control unit 55 incorporating the voltage variable means 22 and the power supply stopping means 54 described above are connected. The power supply control unit 55 gives the first high voltage value or the second high voltage value from the high voltage generating power supply 14 between the electrode 16 and the counter electrodes 17 and 17 at a predetermined operation timing. The fan motor 8 is driven by the fan motor driving means 23.

  When the spark discharge detecting means 21 detects the spark discharge, the control means 20 sets the second high voltage value lower than the first high voltage value before detecting the spark discharge so far to the electrode 16 and the counter electrodes 17, 17. When the spark discharge detecting means 21 detects the spark discharge again during the operation at the second high voltage value, the operation as the discharge photocatalyst deodorizing device 51 is performed. There is provided a spark discharge prevention control means 61 for stopping the operation and causing the warning LED 52 as the abnormality display means to blink or turn on to display the abnormality. In this case, the first high voltage value is, for example, 7.8 kV, and the second high voltage value is, for example, 6.8 kV. The high voltage generating power source 14 is provided on the PC board 53 as a circuit including a high voltage transformer, and the control means 20 is incorporated in the PC board 53 as a circuit including a microcomputer.

  Further, the spark discharge prevention control means 61 in this case is switched to the second high voltage value as soon as the spark discharge detection means 21 once detects the spark discharge during operation at the first high voltage value, and the catalytic reactor 9 When the spark discharge detecting means 21 once detects a spark discharge during operation at the second high voltage value, the operation as the discharge photocatalyst deodorizing device 51 is immediately stopped and the warning LED 52 blinks or In order to avoid frequent operation stop and warning display, when the spark discharge detection means 21 detects a predetermined number of spark discharges during operation at the first high voltage value, When the catalyst reaction device 9 is operated by switching to the second high voltage value, and then the spark discharge detection means 21 detects a predetermined number of spark discharges during operation at the second high voltage value, the discharge photocatalyst deodorization device there. Stop operation and warning as 51 LED 52 may be blinked or lit. Here, the predetermined number of times may be two or more times.

  As an example, the spark discharge prevention control means 61 stops the voltage application between the electrode 16 and the counter electrodes 17 and 17 when the spark discharge detection means 21 detects a spark discharge during operation at the first high voltage value. Then, only the fan motor 11 is operated, the operation is performed again at the first high voltage value after a predetermined time, and the spark discharge detecting means 21 detects the spark discharge again during the operation at the first high voltage value. The voltage application between the electrode 16 and the counter electrodes 17 and 17 is stopped, and only the fan motor 11 is operated. After a predetermined time, the operation is performed at the second high voltage value. When the spark discharge detection means 21 detects a spark discharge during operation, the voltage application between the electrode 16 and the counter electrodes 17 and 17 is stopped, and only the fan motor 11 is operated. Operates at the second high voltage value and detects spark discharge during operation at the second high voltage value When stage 21 again detects a spark discharge, where the running operation of the discharge photocatalyst deodorizing device 51 is stopped, LED 52 may blink or light the a warning. Thus, during the operation at the first high voltage value or the second high voltage value, after the spark discharge detecting means 21 first detects the spark discharge, only the fan motor 8 can be temporarily operated. Has been made. As a result, when dust or the like is accumulated in the catalyst reaction device 9, dust or the like is removed by blowing air from the fan motor 8, or when condensation is attached to the catalyst reaction device 9, blowing air from the fan motor 8. Can remove condensation and eliminate the cause of spark discharge.

  Next, the operation of the above configuration will be described with reference to the flowchart of FIG. When the power connector 3 is connected to the nearest power source (not shown) and a predetermined voltage is applied to the PC board 6, the procedure proceeds from the start step of routine RT2 in FIG. 9 to step SP11. In step SP11, the fan motor 8 is activated in response to a command from the control means 20 to the fan motor driving means 23, and the air containing the odor component is supplied from the intake port 4 to the prefilter (not shown) and the fan motor. 8 is sent to the catalytic reactor 9. At the same time, in response to a command signal from the control means 20, a predetermined high voltage is generated from the high voltage generating power source. As a result, corona discharge occurs between the electrode 16 and the counter electrodes 17 and 17, and the odor components in the air are decomposed. As in the first embodiment, the air from which the odor components are removed becomes one of the cases 2. It is discharged to the outside from the exhaust port 5 on the side surface 2B.

  In step SP11, the spark discharge prevention control means 61 constituting the control means 20 outputs a command signal so that the first high voltage value is first generated from the high voltage generation power source 14. In the next step S12, the spark discharge prevention control means 61 determines whether or not the spark discharge detection means 21 has detected a spark discharge in the catalytic reaction device 9. The function of the spark discharge detection means 21 is the same as that of the first embodiment. When a spark discharge occurs, the spark discharge is detected by utilizing the fact that the value of the current flowing through the high voltage generating power source 14 changes significantly. Detect. As long as the spark discharge detecting means 21 does not detect the spark discharge, that is, as long as the corona discharge continues, the operation of the catalytic reactor 9 is performed at the first high voltage value.

  On the other hand, in step SP12, for example, when a large amount of dust or the like is accumulated in the catalyst reaction device 9 or condensation is attached to the catalyst reaction device 9 due to high humidity, the spark discharge detection means 21 detects the spark discharge. A signal S1 (see FIG. 8) is output to the control means 20. In response to this, the spark discharge prevention control means 61 determines in the next step SP13 how many times the spark discharge has been detected during operation at the first high voltage value. In the case of the first spark discharge detection, the spark discharge prevention control means 61 proceeds to the procedure of step SP14 and operates only the fan motor 8 for a predetermined time, for example, 10 minutes, during which the electrode 16 and the counter electrodes 17, 17 are operated. The voltage application between the two is interrupted, and the operation of the catalytic reaction device 9 is stopped. Accordingly, when spark discharge occurs due to a large amount of dust accumulating in the catalytic reaction device 9 due to long-term use, a part of the dust is generated in a state where no spark discharge occurs by operating only the fan unit 8. Is removed by blowing. Further, even when a spark discharge occurs due to condensation due to high humidity, the condensation is removed in a state where no spark discharge occurs, and the atmosphere is improved so that the spark discharge hardly occurs.

  Thus, when the predetermined 10 minutes elapses, the procedure returns to the procedure of step SP11, and the operation of the catalyst reaction device 9 is performed again at the first high voltage value. In the above-described procedure of step S14, the inside of the catalytic reaction device 9 is in a state in which spark discharge is unlikely to occur. Here, when the spark discharge detecting means 21 detects the spark discharge again, the procedure from step SP12 to step S13 is performed. Then, the spark discharge prevention control means 61 determines that the second spark discharge detection is made, and operates only the fan motor 8 again for a predetermined time, for example, 10 minutes, during which a voltage is applied between the electrode 16 and the counter electrodes 17 and 17. And the operation of the catalytic reaction device 9 is stopped (step SP15).

  Similarly to the procedure of step SP11, the procedure of step SP15 is to form a state in which the spark discharge is unlikely to occur in the catalytic reactor 9, but after a predetermined 10 minutes have passed, the procedure of step SP16 is now performed. Then, the operation of the catalytic reactor 9 is restarted at another second high voltage value. The second high voltage value is lower than the first high voltage value, and spark discharge is less likely to occur than when the catalytic reactor 9 is operated at the first high voltage value. Thus, between the electrode 16 on both sides of the photocatalysts 15 and 15 and the counter electrodes 17 and 17, the air insulation is partially broken again to cause corona discharge, and the electrode 16 is worn, damaged, or melted due to continuous spark discharge. Can be prevented.

  In the next step SP17, the spark discharge prevention control means 61 determines whether or not the spark discharge detection means 21 has detected a spark discharge. However, unless the spark discharge is detected, that is, as long as the corona discharge continues, The catalytic reactor 9 is operated at a high voltage value of 2. On the other hand, during the operation at the second high voltage value, in addition to the accumulation of a large amount of dust in the catalytic reaction device 9, if conditions such as high temperature and high humidity that are likely to cause spark discharge are added, even under this circumstance, the spark Discharge may occur. When the spark discharge detection means 21 detects a spark discharge, the spark discharge prevention control means 61 proceeds to the procedure of step SP18, and the number of times of spark discharge is detected during operation at the second high voltage value. Judge whether or not. In the case of the first spark discharge detection, the spark discharge prevention control means 61 shifts to the procedure of step SP19 to operate only the fan motor 8 for a predetermined time, for example, 10 minutes, during which the electrode 16 and the counter electrodes 17, 17 are operated. The voltage application between the two is interrupted, and the operation of the catalytic reaction device 9 is stopped. As described above, this is performed in order to improve the inside of the catalytic reaction device 9 in an atmosphere in which spark discharge hardly occurs.

  Thus, when the predetermined 10 minutes have elapsed, the procedure returns to the procedure of step SP16, and the operation of the catalytic reaction device 9 is performed again at the second high voltage value. In the above-described procedure of step S19, the inside of the catalytic reaction device 9 is in a state in which spark discharge is unlikely to occur. Here, when the spark discharge detecting means 21 detects the spark discharge again, the procedure from step SP17 to step S18 is performed. The spark discharge prevention control means 61 determines that this is the second spark discharge detection, and this time, the operation as the discharge photocatalyst deodorization device 51 including the fan motor 8 as well as the catalytic reaction device 9 is stopped, and a warning is made. The LED 52 blinks or lights up (step SP20). Then, the process proceeds to the next step SP21, and the process as the spark discharge prevention control means 61 ends.

  As described above, also in this embodiment, the catalytic reaction device 9 in which the photocatalysts 15 and 15 are disposed between the electrodes 17 and 17 that generate ultraviolet rays and ozone, and the ozone decomposition catalyst 10 that decomposes ozone. In the discharge photocatalyst deodorizing device 51 provided with a fan motor 8 that allows gas to pass from the catalytic reaction device 9 to the ozone decomposition catalyst 10, spark discharge detection means 21 as detection means for detecting spark discharge of the catalytic reaction device 9, The spark discharge prevention control means 61 of the control means 20 for operating the catalytic reactor 9 at a second high voltage value which is a predetermined high voltage value by the spark discharge detection of the spark discharge detection means 21 is provided.

  For this reason, when the spark discharge detecting means 21 detects the spark discharge, the catalytic reaction device 9 operates at a predetermined high voltage value, so that it is possible to prevent the occurrence of continuous spark discharge, and thus damage to the electrode due to the spark discharge. Can be prevented.

  Further, in this embodiment, when the spark discharge detecting means 21 detects the spark discharge again during operation of the catalyst reaction apparatus 9 at the second high voltage value, the operation of the catalyst reaction apparatus 9 is stopped and a warning means is provided. The spark discharge prevention control means 61 of the control means 20 is configured to operate (flash or light) the warning LED 52.

  In this way, when the spark discharge detection means 21 detects the spark discharge again during operation at the second high voltage value which is a predetermined high voltage value after the spark discharge detection means 21 detects the spark discharge, the catalytic reaction Since the operation of the device 9 is stopped, it is possible to prevent the occurrence of a spark discharge many times during the operation at the second high voltage value, thereby further reliably preventing the occurrence of a continuous spark discharge. it can. In addition, even if the catalytic reaction device 2 is operated at a second high voltage value lower than the first high voltage value, the user is recognized by the operation of the warning LED 52 that spark discharge occurs. be able to.

  Further, the spark discharge prevention control means 61 in this case is the second high voltage value when the spark discharge detection means 21 detects a predetermined number of spark discharges while the catalytic reaction device 9 is operating at the first high voltage value. When the spark discharge detecting means 21 detects a predetermined number of spark discharges while operating the catalyst reaction device 9 at the second high voltage value, the operation of the discharge photocatalyst deodorizing device 51 is stopped. The warning LED 52 is configured to operate.

  In this case, when the spark discharge detecting means 21 detects a predetermined number of spark discharges during operation at the first high voltage value, the operation shifts to the operation of the catalytic reaction device 9 at the second high voltage value. When the spark discharge detection means 21 further detects a predetermined number of spark discharges during the operation at a high voltage value, the operation of the discharge photocatalyst deodorizing device 51 is stopped and the warning LED 52 is operated, so that the spark discharge easily occurs. Under the circumstances, it is possible to reduce the frequent occurrence of the operation stop as the discharge photocatalyst deodorization apparatus 51.

  Moreover, the spark discharge prevention control means 61 in the present embodiment applies voltage to the catalyst reaction apparatus 9 when the spark discharge detection means 21 detects the spark discharge while the catalyst reaction apparatus 9 is operating at the first high voltage value. And only the fan motor 8 which is a flow feeding device is operated, and after a predetermined time, the operation is performed again at the first high voltage value, and the catalyst reaction device 9 is operated at the first high voltage value. When the spark discharge detecting means 21 detects the spark discharge again, the voltage application to the catalyst reaction device 9 is stopped and only the fan motor 8 is operated, and after a predetermined time, the operation is performed at the second high voltage value. When the spark discharge detecting means 21 detects a spark discharge during operation of the catalyst reaction device 9 at the second high voltage value, the voltage application to the catalyst reaction device 9 is stopped and only the fan motor 8 is operated for a predetermined time. Later run again at the second high voltage value When spark discharge detection unit 21 during the operation in the second high voltage value to detect a spark discharge again the operation of the discharge photocatalyst deodorizing device 51 is stopped, and configured to operate a warning LED 52.

  In this way, when the spark discharge detecting means 21 detects a spark discharge during the operation of the catalytic reaction device 9 with the first high voltage value or the second high voltage value, only the fan motor 8 is operated. Part of the dust accumulated in the catalytic reaction device 9 can be removed by blowing air, and when the cause of the spark discharge is condensation due to high temperature, the condensation is removed by blowing and an environment in which spark discharge is difficult to occur can be formed. In addition, since the discharge as a photocatalyst deodorizing device 51 is stopped and the warning LED 52 is operated several times before the alarm LED 52 is operated, continuous spark discharge occurs in a situation where spark discharge is likely to occur. In addition, the frequent stoppage of the operation of the apparatus can be significantly reduced.

  In addition, this invention is not limited to said each Example, A various deformation | transformation implementation is possible. In each of the above-described embodiments, the case where the first high voltage value is selected to be about 7.8 kV has been described. However, the present invention is not limited to this, and the first high voltage value is about 7.0 to 7.0. It may be selected between 8.6 kV, and the point is that the corona discharge can be caused between the electrode 16 and the counter electrodes 17 and 17 at the normal time. Similarly, the second high voltage value is selected to be about 6.8 kV, but the present invention is not limited to this, and the second high voltage value is selected between about 6.1 to 7.5 kV. In short, it is only necessary that the voltage value is lower than the first high voltage value, and the corona discharge can be caused again between the electrode 16 and the counter electrodes 17 and 17.

  In the second embodiment, for example, a buzzer as a notification means may be provided in place of the warning LED 52, and a warning sound may be emitted from the buzzer when a spark discharge occurs, and various other warning means may be provided. May be.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the whole structure of the discharge type photocatalyst apparatus in 1st Example of this invention, (A) is the top view, (B) is the side view. It is sectional drawing which shows an internal structure of a discharge type photocatalyst apparatus same as the above. It is the schematic which shows the whole structure of a catalytic reaction apparatus same as the above. It is a block diagram which shows the circuit structure of a discharge type photocatalyst apparatus same as the above. It is a flowchart which shows the process sequence of a spark discharge prevention control means same as the above. It is a figure which shows the whole structure of the discharge type photocatalyst apparatus in 2nd Example of this invention, (A) is the top view, (B) is the side view. It is sectional drawing which shows an internal structure of a discharge type photocatalyst apparatus same as the above. It is a block diagram which shows the circuit structure of a discharge type photocatalyst apparatus same as the above. It is a flowchart which shows the process sequence of a spark discharge prevention control means same as the above.

Explanation of symbols

1,51 Discharge type photocatalyst deodorizer (catalyst deodorizer)
8 Fan motor (flow feeding device)
9 Catalytic reactor
10 Ozone decomposition catalyst
15 Photocatalyst (catalyst)
16 electrodes
17 Counter electrode (electrode)
20 Control unit (control means)
21 Spark discharge detection means (detection means)
52 Warning LED (Warning means)

Claims (5)

In a catalyst deodorization apparatus equipped with a catalyst reaction apparatus in which a catalyst is disposed between electrodes,
A catalyst deodorizing apparatus comprising: a detecting means for detecting a spark discharge; and a control means for operating the catalytic reaction apparatus at a predetermined voltage value by detecting the spark discharge of the detecting means.   2. The catalyst deodorization apparatus according to claim 1, wherein the control means stops operation and activates a warning means when the detection means detects spark discharge again.   The catalyst deodorization apparatus according to claim 1 or 2, wherein the predetermined voltage value is a second voltage value lower than the first voltage value.   When the detection unit detects a predetermined number of spark discharges, the control unit shifts to an operation based on the second voltage value which is the predetermined voltage value, and the detection unit detects the predetermined number of spark discharges during the operation. 4. The catalyst deodorizing apparatus according to claim 2, wherein the operation is stopped and the warning means is operated. A flow sending device for moving the fluid;
When the detection means detects a spark discharge during operation at the first voltage value, the control means stops the voltage application to the catalytic reaction device to operate the flow sending device, and again after a predetermined time, the control means Operate at the first voltage value,
When the detection means detects the spark discharge again during the operation of the first voltage value, the voltage application to the catalytic reaction device is stopped to operate the flow sending device, and the second voltage value after a predetermined time. Drive in,
When the detection means detects a spark discharge during operation at the second voltage value, the voltage application to the catalytic reaction device is stopped to operate the flow sending device, and the second voltage value is again activated after a predetermined time. Drive in,
5. The catalyst deodorization apparatus according to claim 4, wherein when the detection unit detects spark discharge again during operation at the second voltage value, the operation is stopped and the warning unit is operated.

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