JPH0722592B2 - Deodorizer - Google Patents

Description

TECHNICAL FIELD The present invention relates to a deodorizing device that deodorizes with ozone.

[Prior Art] In an example of a conventional deodorizing device, a discharge electrode section for ozone generation is provided in a case having an electric fan for inducing an air flow having an intake port and an air supply port, and further downstream of the discharge electrode unit. Is provided with an odor absorbing and decomposing portion made of, for example, activated carbon. Ozone generated in the discharge electrode section decomposes the odorous components adsorbed in the odor absorbing and decomposing section, and at the same time, excess ozone recombines and decomposes on the surface of the odor absorbing and decomposing section to prevent ozone from leaking to the external space.

In another prior art example, the electric fan is stopped when ozone is generated in order to prevent ozone from leaking to the external space.

[Problems to be Solved by the Invention] However, the above-described conventional deodorizing device has the drawbacks described below.

That is, when decomposing ozone by the odor absorbing and decomposing section provided downstream of the discharge electrode section, the ozone decomposing ability of the odor absorbing and decomposing section must be designed to be sufficiently larger than that of the discharge electrode section. It is necessary to increase the size of the decomposition part (generally increase the area of the odor absorbing decomposition part). Of course, if the discharge electrode section's ozone generation capacity is reduced, it is not necessary to enlarge the odor absorbing and decomposing section. Noh deteriorates over time.

On the other hand, if the electric fan for inducing air flow is stopped during ozone generation, ozone leakage from the odor decomposition section can be prevented by stopping the air flow, but ozone becomes dense in the discharge electrode section and the upstream side of the case Ozone diffuses to the outside from the (suction side) opening.

The present invention has been made in view of such a problem, and an object thereof is to provide a deodorizing device capable of preventing external leakage of ozone without increasing the size of the odor absorbing and decomposing portion.

[Means for Solving the Problems] A deodorizing apparatus of the present invention is a cylindrical case having an intake port and an air supply port and containing an electric fan, and a discharge electrode portion provided inside the case and generating ozone by discharge. A high-voltage power supply unit for applying a discharge voltage to the discharge electrode unit, an odor-absorption decomposition unit disposed downstream of the discharge electrode unit in the case for absorbing odors and ozone, the electric fan and the high-voltage power supply In the deodorizing device including a control unit for controlling the drive of the unit, the control unit includes an odor absorbing command unit for instructing high-speed rotation of the electric fan and suppression of ozone generation amount, a low-speed rotation of the electric fan, and ozone. It is characterized by having a reproduction command section for commanding an increase in the generation amount.

[Operation] In the high-speed operation mode in which the odor absorption command section of the control means reduces the discharge current of the discharge electrode section to reduce the ozone generation amount and the electric fan is rotated at high speed, the passage time of ozone passing through the odor decomposition section is reduced. Since it is shortened, the ozone capture rate of the odor absorbing and decomposing section is lowered. However, since the ozone generation amount itself is reduced, the ozone leakage amount, which is the product of the two, is suppressed below the allowable level, and the ozone leakage amount becomes 0 when the discharge is stopped. Therefore, in this high-speed operation mode, the odor absorbing and decomposing section treats a large amount of air (adsorbs odorous components from a large amount of air) to strongly deodorize and prevents ozone leakage exceeding the allowable level.

On the other hand, in the low-speed operation mode in which the odor absorption decomposition part regeneration command part of the control means increases the discharge current of the discharge electrode part to increase the ozone generation amount and the electric fan rotates at low speed,
Since ozone passes through the odor absorbing and decomposing section for a longer time, the ozone capturing rate of the odor absorbing and decomposing section is increased. Therefore,
Although the amount of ozone generated itself increases, the amount of ozone leakage, which is the product of the two, is suppressed below the allowable level. Therefore, in this low-speed operation mode, the odorous components adsorbed on the surface of the odor absorbing and decomposing portion are rapidly decomposed by high-concentration ozone to regenerate the odor absorbing and decomposing portion, and ozone leakage exceeding the allowable level is prevented. Further, since the air flow is maintained at a low speed, ozone is prevented from leaking from the opening on the upstream side of the case.

[Embodiment] (First Embodiment) An embodiment of the deodorizing apparatus of the present invention will be described with reference to the block diagram of FIG.

This deodorizing device has a cylindrical case 1 having an intake port 11 and an air supply port 12, and an electric fan 2, a discharge electrode part 3 and an odor absorbing / decomposing part 4 are provided on the resin case 1 from the upstream side. They are installed in order.

The electric fan 2 is a sirocco fan having a variable speed DC brushless motor built-in, and the discharge electrode portion 3 is a pair of electrodes (not shown) that face each other with a predetermined discharge gap interposed therebetween.

The odor absorbing and decomposing section 4 is composed of a porous filter made of activated carbon, and this activated carbon has a function of adsorbing odorous components and ozone. A porous filter made of a catalyst material such as titanium oxide may be used as the odor absorbing and decomposing section 4.

One of the electrode pairs of the discharge electrode section 3 is grounded,
The other end is connected to the output terminal of the secondary coil 51 of the high voltage power supply unit 5 which is composed of a step-up transformer with a predetermined turn ratio. One end of the primary coil 52 of the high-voltage power supply unit 5 is grounded, and the other end is connected to the discharge voltage terminal 60 of the control means 6.

The control means 6 includes a power switch 61, a start switch 62, a reproduction switch 63, a microcomputer 64, an oscillator 65, a power amplifier 66,
It consists of a stop switch 67. The microcomputer 64 constitutes an odor absorbing command section and a reproduction command section according to the present invention, receives an input signal from each of the above switches, and sets the oscillation frequency of the multivibrator type oscillator 65 and the rotation speed of the electric fan 2 to 2 respectively. It has the function of switching to the stage.

The operation of this deodorizing device will be described with reference to the flowchart of the microcomputer 64 shown in FIG.

First, the power switch 61 is turned on to reset the necessary parts of the microcomputer 64 to the initial state (S10), and the process waits until the start switch 62 is turned on (S12).

If the start switch 62 is turned on (S12), the electric fan 2
Is rotated at about 1800 rpm to generate a high-speed air flow flowing from the intake port 11 to the air supply port 12, and the oscillator 65 is also oscillated at 400 Hz (S14). As a result, the 400 Hz pulse signal output from the oscillator 65 is power-amplified by the power amplifier 66, then boosted to a predetermined voltage value by the high-voltage power supply unit 5 to become a discharge voltage, and applied to the electrode pair of the discharge electrode 3. It By applying this discharge voltage, corona discharge occurs between the electrode pair of the discharge electrodes 3, and ozone is generated in the air flow. The odor absorbing and decomposing section 4 adsorbs the odorous components and ozone, but since the ozone production amount is relatively low, the odorous components accumulate in the odor absorbing and decomposing section when there are many odorous components. Since the air flow is high-speed, the time required for ozone to pass through the odor absorbing and decomposing section is short, but since the amount of generated ozone itself is small, ozone is captured and decomposed by the odor absorbing and decomposing section 4, and as a result, ozone leaking from the odor absorbing and decomposing section 4 Is suppressed below the acceptable level.

Next, it is checked whether or not the regeneration switch 63 for instructing the regeneration of the odor absorbing and decomposing section 3 is turned on (that is, whether or not the activated carbon regeneration signal is input) (S16), and if it is turned on, the electric fan 2 is rotated at about 400 rpm. Then, a low-speed air flow is generated, and the oscillator 65 is oscillated at 1800 Hz along with it (S18). As a result, the 1800 Hz pulse signal output from the oscillator 65 is power-amplified by the power amplifier 66, then boosted to a predetermined voltage value by the high-voltage power supply unit 5 to become a discharge voltage, and applied to the electrode pair of the discharge electrode 3. It By applying this discharge voltage, corona discharge is generated between the electrode pair of the discharge electrodes 3 and a relatively large amount of ozone is generated in the air flow. This large amount of ozone strongly decomposes the odorous components adsorbed in the odor absorbing and decomposing section 4, and regenerates the odor absorbing and decomposing section 4. At this time, since the air flow is slow, the ozone passes through the odor absorbing and decomposing section for a long time, and is sufficiently captured and decomposed by the odor absorbing and decomposing section 4. As a result, the ozone leaking from the odor absorbing and decomposing section 4 can be suppressed to an allowable level or less even though the generated ozone amount is large.

The low speed operation mode shown in step 18 is executed for a predetermined time (S20), and the process returns to S14.

To stop the operation, the interruption switch 67 is turned on to start the interrupt routine (see FIG. 3), the electric fan 2 is stopped, the discharge is stopped (S22), and the routine is ended.

FIG. 4 shows the relationship between the frequency of the discharge voltage applied to the discharge electrode section 3 and the rotation speed of the electric fan 2.

In this embodiment, the discharge voltage value may be changed instead of changing the oscillation frequency for controlling the ozone generation amount.
In addition, the power supply to the discharge electrode unit 3 may be cut off in S14.

(Second Embodiment) In this embodiment, in the deodorizing device of the first embodiment, switching between the high speed operation mode (S14) and the low speed operation mode (S18) is performed by the air supply port 12, that is, the odor absorbing / decomposing section 4. This is performed based on a signal from an odor sensor (not shown) provided downstream, and the device configuration is configured by adding the odor sensor to the first embodiment (see FIG. 1). The output signal of the odor sensor is amplified, A / D converted, and input to the microcomputer 64 as a digital odor concentration signal (hereinafter referred to as a concentration signal).

The operation of this deodorizing device will be described with reference to the flowchart of FIG.

First, the routine is started by turning on the power switch 61, and after initial setting, the start signal is waited for. If the start signal is input (S30), the concentration signal D of the odor sensor is read (S32).

Next, if the density signal D is equal to or lower than the preset minimum allowable density DL (S34), the electric fan 2 is stopped and the discharge is stopped (S38). If the allowable density DL is exceeded (S34), the density signal D is compared with the preset maximum density DH (S3
6). If the density signal D is less than or equal to the maximum density DH,
The electric fan is rotated at about 1800 rpm to generate a high-speed air flow, and the oscillator 65 is also oscillated at 400 Hz (S1
Four).

On the other hand, if the density signal D exceeds the maximum density DH, the electric fan 2 is rotated at about 400 rpm to generate a low-speed air flow, and the oscillator 65 is also oscillated at 1800 Hz (S18).

To stop the operation, the interruption switch 67 is turned on to start the interrupt routine (see FIG. 3), the electric fan 2 is stopped, the discharge is stopped (S22), and the routine is ended.

(Third Embodiment) In this embodiment, in the deodorizing device of the first embodiment, switching between a high speed operation mode (S14) and a low speed operation mode (S18) is performed by a high speed operation timer (Fig. (Not shown) and a low speed operation timer (not shown), and the device configuration may be the same as that of the first embodiment (see FIG. 1).

The operation of this deodorizing device will be described with reference to the flowchart of FIG.

First, the routine is started by turning on the power switch 61, and after the initial setting, waits for the input of the start signal, and when the start signal is input (S40), the electric fan 2 is rotated at about 1800 rpm to generate a high-speed air flow. The oscillator 65 at 400Hz
To oscillate (S42). Then, the high-speed operation timer set for a predetermined time (for example, 1 hour) is started (S4
4) Wait until this high-speed operation timer expires (S4
6). When the high-speed operation timer expires, turn the electric fan 2 to about 4
It rotates at 00 rpm to generate a low-speed air flow, and at the same time, oscillates the oscillator 65 at 1800 Hz (S48). Then, the low speed operation timer set for a predetermined time (for example, 10 minutes) is started (S50), and the operation waits until the low speed operation timer ends (S52). When the low speed operation timer ends, the process returns to S42.

To stop the operation, the interruption switch 67 is turned on to start the interrupt routine (see FIG. 3), the electric fan 2 is stopped, the discharge is stopped (S22), and the routine is ended.

[Effects of the Invention] As described above, in the deodorizing apparatus of the present invention, the control means instructs the high-speed rotation of the electric fan and the suppression of the ozone generation amount, the odor absorption command section, the low-speed rotation of the electric fan, and the ozone generation amount. Since it has a playback command section that points to the increase of
When the electric fan rotates at a high speed, the odor absorbing / decomposing section adsorbs odorous components from a large amount of air to strongly deodorize and prevents ozone from leaking. Also, when the electric fan rotates at a low speed, the odorous components adsorbed on the surface of the odor absorbing and decomposing portion are rapidly decomposed by relatively high-concentration ozone to strongly regenerate and sterilize the odor absorbing and decomposing portion, and prevent ozone leakage. be able to. Furthermore, since the air flow is maintained at a low speed, ozone can be prevented from leaking from the upstream opening of the case.

[Brief description of drawings]

FIG. 1 is a block diagram of a deodorizing apparatus according to an embodiment of the present invention, FIGS. 2 and 3 are flowcharts showing its operation, and FIG.
FIG. 5 is a timing chart showing changes in the rotation speed of the electric fan 2 and ozone generation amount, and FIGS. 5 and 6 are flowcharts showing other embodiments. 1 ... Case 2 ... Electric fan 3 ... Discharge electrode part 4 ... Odor absorbing / decomposing part 5 ... High-voltage power supply part 6 ... Control means (odor absorbing command part and regeneration command part)

Claims (1)

[Claims] 1. A case having an electric fan and having an intake port and an air supply port, a discharge electrode section provided inside the case for generating ozone by discharge, and a high voltage for applying a discharge voltage to the discharge electrode section. A power source section, and an odor absorbing and decomposing section disposed downstream of the discharge electrode section in the case for absorbing odors and decomposing ozone,
In the deodorizing device comprising a control means for controlling the operation of the electric fan and the high-voltage power supply section, the control means, an odor absorption command section for instructing high-speed rotation of the electric fan and suppression of the ozone production amount, A deodorizing device, comprising: a regeneration command unit that commands low-speed rotation of the electric fan and an increase in ozone production.