JP4862486B2 - Catalyst deodorizer - Google Patents

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 a source of odor in a fluid by sandwiching a catalyst between electrodes constituting a catalyst reaction apparatus and exciting the catalyst by discharge between electrodes constituting the counter electrode. It is designed to break down organic matter.

By the way, in such a catalyst deodorizing apparatus, an ozone decomposition catalyst is provided, and the remaining ozone is guided to the ozone decomposition catalyst by a blower, and the ozone is decomposed into oxygen by the ozone decomposition catalyst. By discharging into the air, harmful ozone is prevented from being discharged into the air (for example, see Patent Document 1).
JP 2005-13383 A

  However, in the catalyst deodorization apparatus having such a configuration, when electric power is supplied to the catalyst reaction apparatus to generate ultraviolet rays and ozone, it is generated in the apparatus when the blower is suddenly stopped and locked for some reason. There is a problem that the ozone flowing back to the intake port side and harmful ozone is discharged to the outside air through the intake port.

  An object of this invention is to provide the catalyst deodorizing apparatus which can prevent reliably discharge | emission of ozone to the open air, even when a ventilation apparatus stops suddenly etc. in view of the said problem.

The catalyst deodorization apparatus according to claim 1 of the present invention comprises a catalyst reaction apparatus in which a catalyst is disposed between electrodes to be discharged, an ozone decomposition means for decomposing ozone, and a blower apparatus for blowing gas. in the blower, a blower drive unit, a built-in detection means for detecting the operation of the blower, the adjusting means for adjusting the operation of the catalytic reactor by the operation detection of the detection means is provided, before Symbol It characterized when the detection unit detects the abnormality, after a delay, and controls the blower drive means, further comprising a controller to I rows intermittent operation of driving the air blowing device for a predetermined time at a predetermined interval It is what.

  The catalyst deodorization apparatus according to claim 2 of the present invention is characterized in that a warning means is provided which operates by detecting the operation of the detection means.

  According to a third aspect of the present invention, there is provided a catalyst deodorization apparatus comprising a timing adjusting means for adjusting an operation start timing of the catalyst reaction apparatus.

According to the catalyst deodorizing apparatus of claim 1 of the present invention, since the operation as the catalytic reaction apparatus is automatically adjusted even if the blower suddenly stops for some reason, the generation of ozone in the fluid As a result, the backflow of ozone can be prevented in advance, and the discharge of ozone to the outside air can be reliably prevented even when the blower suddenly stops. In addition, by repeating the power feeding operation for feeding power to the blower intermittently for a predetermined time, wasteful power feeding to the blower can be suppressed as much as possible during the abnormal stop period.

  According to the catalyst deodorizing apparatus of claim 2 of the present invention, the user can be made aware through the warning means that the blower has stopped and that ozone is not currently generated.

  According to the catalyst deodorization apparatus of claim 3 of the present invention, since the catalyst reaction apparatus is operated after the rotational adjustment of the blower is stabilized by the timing adjusting means, the ozone generated by the catalyst reaction apparatus is reduced. The blower can reliably lead to the ozonolysis means, and ozone backflow can be reliably prevented.

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

  1A and 1B, reference numeral 1 denotes a discharge type photocatalyst deodorization apparatus as a catalyst deodorization apparatus according to the present invention. This discharge type photocatalyst deodorization apparatus 1 is a housing that forms an outer shell by combining a plurality of resin molded parts. A body 2 is provided so that current can be supplied from a power source via a power connector 3 so that the body 2 can operate. The upper surface 2A of the housing 2 has an air inlet 4 formed with an opening, a warning LED (Light Emitting Diode) 5 is provided, and a transparent sheet 5a is affixed to a position opposite to the LED 5, and the sheet 5a The light of the LED 5 is transmitted through. Further, an exhaust port 7 communicating with the intake port 4 is formed in one side surface 2B of the housing 2 in the inside of the housing 2.

  In practice, a wind tunnel 10 communicating from the intake port 4 to the exhaust port 7 is formed in the housing 2 as shown in FIG. 2, and the fan motor drive means and fan lock detection means described later are built in. A motor 11 is provided in the wind tunnel 10. On the exhaust side of the fan motor 11 as a blower, a catalyst reaction device 12 and an ozone decomposition catalyst 13 on the downstream side of the catalyst reaction device 12 for decomposing and removing ozone are sequentially arranged. , The air to be deodorized sucked from the intake port 4 sequentially passes through the catalytic reactor 12 and the ozone decomposition catalyst 13 and can be discharged from the exhaust port 7 to the outside of the housing 2.

  As shown in FIG. 3, the catalytic reactor 12 includes a high-voltage generating power source 14 that generates a high voltage of several KV to several tens of KV, and a positive electrode 16 disposed between a pair of photocatalysts 15 and 15. And counter electrodes 17 and 17 which are negative electrodes arranged 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. A high voltage from the power supply 14 can be applied between the electrode 16 serving as a 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, in the discharge type photocatalyst deodorization apparatus 1, as shown in FIG. 4, a delay means 25 is provided to a control unit 20 having a CPU (Central Processing Unit) configuration for comprehensively controlling the discharge type photocatalyst deodorization apparatus 1. A built-in fan lock detection means 21, a power supply stop means 22 as a stop means, a warning LED 5 as a warning means, and a fan motor drive means 23 are connected, and the power supply stop means 22 has a high voltage. A power supply 14 for generation is connected, and the fan motor 11 is connected to the fan motor driving means 23.

  In this embodiment, the fan lock detection means 21 detects that the rotation of the fan motor 11 has suddenly stopped (abnormally stopped) for some reason and is locked, and an output signal S1 indicating that the rotation has been locked is sent to the control unit 20. Is configured to do. Further, the power supply stopping means 22 cuts off the power supply line between the power supply stop means 22 and the high voltage generating power supply 14 in response to the output signal S1 indicating that it is locked, and the electrode via the high voltage generating power supply 14 The power supply to 16 is stopped.

  Incidentally, in this embodiment, the case where the power supply line between the power supply stopping means 22 and the high voltage generating power supply 14 is cut off has been described. However, the present invention is not limited thereto, and the high voltage generating power supply is not limited thereto. The power supply line between the electrode 14 and the electrode 16 and the high voltage line between the electrode 16 and the counter electrodes 17 and 17 may be cut off. In short, the operation of the catalytic reactor 12 is stopped. What is necessary is just to comprise.

  The delay means 25, after the fan lock detection means 21 as the detection means detects the lock of the fan motor 11, the locked state continues even after a certain time (hereinafter referred to as the delay time), An output signal S <b> 1 indicating that it is in a locked state at that time can be output to the control unit 20. Incidentally, in this embodiment, the case where the delay means 25 is incorporated in the fan lock detection means 21 has been described, but the present invention is not limited to this, and the delay means 25 is added to the control unit 20 or the power supply stop means 22. It may be incorporated.

  In this case, as shown in FIG. 5A, the applied voltage for operating the discharge photocatalyst device 1 is almost stable when a power switch (not shown) is turned on and an alternating current is supplied from a commercial power source. Voltage value Vin1. As a result, the control unit 20 sends an input current from the fan motor driving means 23 to the fan motor 11 to drive the fan motor 11 to rotate. At the same time, the control unit 20 supplies power to the electrode 16 from the high voltage generating power source 14 based on the alternating current supplied from the commercial power source, and the electrode 16 and the counter electrodes 17 and 17, As a result, corona discharge is caused between the electrode 16 and the counter electrodes 17 and 174 to generate ultraviolet rays and ozone. As a result, the photocatalysts 15 and 15 are excited by ultraviolet rays, and excess ozone is decomposed by the ozone decomposition catalyst 13 so that oxygen can be discharged from the exhaust port 7 to the outside of the housing 2.

  Here, as shown in FIG. 5B, the rotation speed of the fan motor 11 is substantially stable while the power switch is ON, and when the fan motor 11 is locked, the rotation speed is substantially “ 0 ".

  As shown in FIG. 5 (C), the input current sent from the fan motor driving means 23 to the fan motor 11 has a substantially stable rated value level while the fan motor 11 is rotating stably. When the fan motor 11 is locked, it rises to the lock level.

  Here, the fan lock detecting means 21 generates an output signal S1 (FIG. 4) for discriminating the rotational driving state of the fan motor 11 based on the input current of the fan motor driving means 23, and this is generated by the control unit. Sending to 20. In this case, as shown in FIG. 5D, the output signal S1 generated by the fan lock detecting means 21 is obtained while the input current sent from the fan motor driving means 23 to the fan motor 11 is at the rated value level. It is at the low level VOL, and rises to the high level VOH when a predetermined delay time t1 (for example, 3 seconds) elapses by the delay means 25 after the input current becomes the lock level.

  As a result, the control unit 20 can determine whether or not the fan motor 11 is locked in response to a change in the signal level of the output signal S1 (that is, rising to the high level VOH). In practice, the control unit 20 determines that the fan motor 11 is locked when the signal level of the output signal S1 rises to the high level VOH, and generates a power supply stop signal and a light emission signal based on the output signal S1. The control unit 20 operates the power supply stopping unit 22 by sending a power supply stop signal to the power supply stop unit 22, and interrupts the power supply from the power supply stop unit 22 to the high-voltage generating power source 14, thereby the catalytic reaction device. In FIG. 12, the corona discharge occurring between the electrode 16 and the counter electrodes 17 and 17 can be stopped to interrupt the generation of ultraviolet rays and ozone.

  Further, power supply to the warning LED 5 is started based on the light emission signal from the control unit 20, and the warning LED 5 starts to emit light. Further, the control unit 20 interrupts the sending of the input current to the fan motor 11 in the fan motor driving means 23 in response to the signal level of the output signal S1 rising to the high level VOH. As a result, the input current at the fan motor 11 falls to the minimum value level GND2, and the power supply to the fan motor 11 is interrupted. In this way, power consumption can be reduced as much as possible during the period in which the fan motor 11 is locked (hereinafter referred to as the lock period).

  In addition to this, the fan motor driving means 23 repeats an intermittent power supply operation of restarting power supply to the fan motor 11 for a predetermined power supply time t3 with a predetermined interval t2 until the lock period ends. Yes. In this case, the fan motor drive means 23 determines that the fan motor 11 is locked if the input current is still at the lock level at the power supply time t3 during the intermittent power supply operation, and then intermittently thereafter. Repeat the power feeding operation. On the other hand, when the input current returns to the rated value level at the power feeding time t3, the fan motor driving means 23 determines that the cause of the lock (cause of abnormal stop) of the fan motor 11 has been resolved and the lock is released, and the input is performed as it is. The electric current continues to be sent to the fan motor 11 and normal power feeding is started again, and the rotational drive of the fan motor 11 is resumed. As a result, as shown in FIG. 5B, the rotational speed of the fan motor 11 gradually increases from the start time point st of the power feeding time t3, and becomes a substantially stable rotational speed.

  At this time, the control unit 20 causes the signal level of the output signal S1 to fall to the logical level VOL after the delay time t1 has elapsed from the start point st of the power supply time t2 (FIG. 5D). When the signal level of the output signal S1 falls to the logical level VOL, the control unit 20 determines that the cause of the abnormal stop of the fan motor 11 has been resolved, and generates a light emission stop signal based on the output signal S1. Thereby, the power supply to the warning LED 5 is stopped based on the light emission stop signal from the control unit 20, and the warning LED 5 is turned off.

  Incidentally, at this time, the control unit 20 generates a power supply restart signal based on the output signal S1, and sends the power supply restart signal to the power supply stop unit 22, thereby stopping the operation of the power supply stop unit 22, and the power supply stop unit. The power supply to the high voltage generating power source 14 is started again from 22 so that a corona discharge is caused between the electrode 16 and the counter electrodes 17 and 17 in the catalytic reactor 12 to generate ultraviolet rays and ozone. good.

  Here, the delay time t1 when the signal level of the output signal S1 falls to the low level VOL is set to the same time as, for example, the time taken until the stopped fan motor 11 starts to rotate almost stably. Yes. Thus, after the fan motor 11 starts to rotate almost stably, the control unit 20 can generate corona discharge between the electrode 16 and the counter electrodes 17 and 17 in the catalytic reaction device 12 so as to generate ultraviolet rays and ozone. Has been made.

  Incidentally, as shown in FIG. 5A, the applied voltage for operating the discharge photocatalyst device 1 falls to a minute value GND1 when the power switch is turned OFF and the supply of AC current from the commercial power supply is stopped. As a result, the input current in the fan motor 11 falls to the minimum value level GND2 (FIG. 5C), and at that time, the rotation of the fan motor 11 starts to stop and gradually decreases to “0” ( FIG. 5 (B)). Thus, the discharge photocatalyst device 1 ends the various operations by stopping the power supply to the various circuit units while the signal level of the output signal S1 falls to the low level VOL.

  In the above configuration, the discharge photocatalyst deodorization apparatus 1 performs an ultraviolet ray generation operation by applying a high voltage pulse of several KV to several tens KV from the high voltage generating power source 14 between the electrode 16 and the counter electrodes 17 and 17. Thus, ultraviolet rays and ozone are generated between the electrode 16 and the counter electrodes 17 and 17, and the photocatalysts 15 and 15 are excited by the ultraviolet rays. Thus, the discharge photocatalyst deodorization apparatus 1 decomposes the substance that is the source of the odor in the air, that is, the organic substance, and simultaneously decomposes the organic substance in the air by the oxidizing action of ozone that is generated. The deodorizing effect can be enhanced with the reaction. Further, in the discharge photocatalyst deodorization apparatus 1, surplus ozone is guided to the ozone decomposition catalyst 13 by the gas flowing from the intake port 4 to the exhaust port 7 by the fan motor 11 and is adsorbed. It exhausts from the exhaust port 7 with the air which does not contain a component.

  At this time, the discharge photocatalyst deodorization device 1 detects that the fan motor 11 is locked, and temporarily stops the power supply to the catalyst reaction device 12 until the fan motor 11 is unlocked, forcing the UV generation operation. Stop. Therefore, in the discharge photocatalyst deodorizing apparatus 1, when the fan motor 11 is locked, the corona discharge occurring between the electrodes 16 and the counter electrodes 17 and 17 on both sides of the photocatalysts 15 and 15 is stopped. Generation of ozone into the inside can be prevented, and thus harmful ozone can be prevented from flowing back into the air inlet 4 in the wind tunnel 10 when no airflow is formed by the fan motor 11.

  Further, in the discharge photocatalyst deodorization apparatus 1, when the fan motor 11 is locked, the warning LED 5 is caused to emit light, so that the fan motor 11 is locked and ozone is not currently generated in the housing 2. This can be instantly recognized by the user by the light emitted from the warning LED 5.

Furthermore, the discharge photocatalyst deodorization apparatus 1 temporarily interrupts continuous power supply to the fan motor 11 until the lock period ends and intermittently supplies power to the fan motor 11 for the power supply time t3. By repeating the operation , wasteful power supply to the fan motor 11 can be suppressed as much as possible during the abnormal stop period, and the fan motor 11 is automatically rotated instantly when the cause of the abnormal stop of the fan motor 11 is resolved. be able to.

  Further, in the discharge photocatalyst deodorizing apparatus 1, the signal level of the output signal S1 is raised to the high level VOH after the delay time t1 has elapsed, and in response to this, the power supply stopping means 22 generates ultraviolet rays and ozone in the catalytic reaction apparatus 12. By stopping the operation, it is possible to prevent the UV generation operation of the catalytic reactor 12 from being interrupted each time with an instantaneous lock that does not cause ozone to be discharged outside the housing 2. As a result, it is possible to prevent the ozone from flowing back to the intake port 4 side, and to achieve a stable operation of the catalytic reaction device 12.

  That is, in the discharge photocatalyst deodorization apparatus 1, when the fan motor 11 is locked, if the operation of the catalyst reaction apparatus 12 is performed as it is, the catalyst can be reliably only when ozone may be discharged outside the housing 2. The operation of the reactor 12 can be stopped.

  In the case of this embodiment, in the discharge photocatalyst deodorizing apparatus 1, when the fan motor 11 is unlocked, the fan motor 11 is first rotationally driven at the start time st of the power supply time t3 to exhaust from the intake port 4. A gas flowing in the mouth 7 is formed, and after the rotational drive of the fan motor 11 is stabilized in this way (that is, after the delay time t1 from the start point st of the power supply time t3), the ultraviolet ray generation operation of the catalyst reaction device 12 is performed. By doing so, the ozone generated by the catalyst reaction device 12 can be reliably guided to the ozone decomposition catalyst 13 side by the gas. Thus, in the discharge photocatalyst deodorization apparatus 1, it is possible to reliably prevent ozone from flowing back through the wind tunnel 10 even when the operation of the catalytic reaction apparatus 12 is performed again after the fan motor 11 is unlocked.

As described above, in the discharge-type photocatalyst deodorization apparatus 1 according to the present embodiment, the catalyst reaction apparatus in which the photocatalysts 15 and 15 as the catalysts are disposed between the electrode 16 that generates ultraviolet rays and ozone and the counter electrodes 17 and 17. 12, an ozone decomposition catalyst 13 for decomposing ozone, and a fan motor 11 as a blower device for blowing or passing a gas (fluid) from the catalyst reaction device 12 to the ozone decomposition catalyst 13. The fan motor 11 is a fan motor. As the adjusting means for incorporating the driving means 23 and the fan lock detecting means 21 for detecting the operation of the fan motor 11, that is, the lock, for example, stopping and adjusting the operation of the catalyst reaction device 12 by detecting the lock of the fan motor 11. the power supply stop means 22 is provided, when the fan lock detecting means 21 detects an abnormality, after a delay, and controls the fan motor driving means 23, a predetermined time at predetermined intervals fan motor It is to so that a control unit 20 to perform the intermittent operation of driving the 11.

Therefore, even if the fan motor 11 suddenly stops for some reason, the operation as the catalytic reaction device 12 automatically stops, so that the generation of ozone in the fluid air is prevented, and as a result Backflow to the inlet 4 side can be prevented in advance, and thus discharge of ozone to the outside air can be reliably prevented even when the fan motor 11 stops suddenly. In addition, since the power supply operation for supplying power to the fan motor 11 is repeated intermittently for the power supply time t3, wasteful power supply to the fan motor 11 can be suppressed as much as possible during the abnormal stop period.

  Further, in this embodiment, the warning LED 5 that operates by the lock detection (stop detection) of the fan lock detection means 21 is provided, so that the fan motor 11 is locked and no ozone is currently generated. Can be instantly recognized by the user by the light emission of the warning LED 5.

  Further, in the present embodiment, by providing the delay means 25 as the timing adjustment means for adjusting and delaying the operation stop timing of the catalyst reaction device 12, even if the fan motor 11 is stopped by the delay means 25, Since the catalytic reaction device 12 does not stop operating immediately, the operation of the catalytic reaction device 12 is prevented from stopping each time due to the instantaneous stop of the fan motor 11, and stable operation of the catalytic reaction device 12 is prevented. Can be planned.

  The present invention is not limited to the above embodiments, and various modifications are possible. For example, a buzzer is provided in place of the warning LED 5 or together with the warning LED 5, and the fan motor 11 stops abnormally. Sometimes, a warning sound may be emitted from the buzzer, or other various warning means may be provided.

  Further, in the above-described embodiment, when the fan motor 11 is locked, the case where the power supply only to the catalytic reaction device 12 is stopped and the ultraviolet ray generation operation is stopped is described. However, the operation of the catalytic reaction device 12 may be stopped by turning off the power supply of the discharge photocatalyst device 1 as a whole.

It is the upper side figure and partial side sectional view which show the whole structure of a discharge type photocatalyst apparatus. It is sectional drawing which shows the internal structure of a discharge type photocatalyst apparatus. It is the schematic which shows the whole structure of a catalytic reaction apparatus. It is a block diagram which shows the circuit structure of a discharge type photocatalyst apparatus. It is a timing chart figure which shows the timing of an applied voltage, rotation speed, input current, and an output signal.

1 Discharge type photocatalyst deodorization device (catalyst deodorization device)
5 Warning LED (Warning means)
11 Fan motor (blower)
12 Catalytic reactor
13 Ozone decomposition catalyst (Ozone decomposition means)
15 Photocatalyst (catalyst)
16 electrodes
17 Counter electrode (electrode)
20 Control unit
21 Fan lock detection means (detection means)
22 Power supply stopping means (adjustment means)
23 Fan motor drive means (fan drive means)
25 Delay means (timing adjustment means)

Claims (3)

In a catalyst deodorization apparatus comprising a catalyst reaction device in which a catalyst is disposed between electrodes to be discharged, an ozonolysis means for decomposing ozone, and a blower for blowing gas,
The blower includes a blower driving means and a detection means for detecting the operation of the blower ,
Adjusting means for adjusting the operation of the catalytic reaction device by detecting the operation of the detecting means;
If the previous SL detection unit detects the abnormality, after a delay, that by controlling the blower driving means, having a control unit to I rows intermittent operation of driving the air blowing device for a predetermined time at a predetermined interval A catalyst deodorizing device characterized by the above.   2. The catalyst deodorizing apparatus according to claim 1, further comprising a warning unit that operates by detecting the operation of the detection unit.   The catalyst deodorizing apparatus according to claim 1, further comprising a timing adjusting unit that adjusts an operation start timing of the catalyst reaction apparatus.

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