JPH0422366A - Deodorizing device - Google Patents

Abstract

PURPOSE:To prevent ozone from leaking to the outside without causing large-sized construction of an odor absorbing/decomposing part by furnishing a control means with an odor absorption command part, which commands high speed rotation of a fan and suppression of the ozone production amount, and a reproduction command part which commands low speed rotation of the fan and increase of the ozone production amount. CONSTITUTION:In the high speed operation mode in which the odor absorption command part of a control means 6 decreases the discharge current of a discharge electrode 3, reduces the ozone production amount, and turns a fan 2 at a high speed, the transit time in which the ozone passes through an odor absorbing/decomposing part 4 is shortened, so that the ozone catching rate of this part 4 will drop. However, the ozone production amount itself has been reduced, so that the ozone leak amount consisting of the product of the two is suppressed below the allowable level, and in case electric discharge is to be stopped, the ozone leak amount nullifies. On the other hand, the odor absorbing/decomposing part and reproduction command part of the control means increase the discharge current of the discharge electrode part to cause increase in the ozone production amount, and also the transit time for the ozone to pass thorough the odor absorbing/decomposing part is prolonged in the low speed operation mode in which the fan is turned at a low speed, so that the ozone catching rate of the odor absorbing/decomposing part is raised.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a deodorizing device that performs deodorization using ozone.

[Prior Art] In an example of a conventional deodorizing device, a discharge electrode section for ozone generation is provided in a case that has an air intake port and an air supply port and incorporates an electric fan for generating airflow, and a discharge electrode section is provided downstream of the discharge electrode section. For example, an odor absorbing and decomposing section made of activated carbon or the like is provided. The ozone generated in the discharge electrode section decomposes the odor components adsorbed on the odor absorption and decomposition section, and at the same time, excess ozone is recombined and decomposed on the surface of the odor absorption and decomposition section, thereby preventing ozone from leaking into the outside space.

In other prior art examples, an electric fan is stopped when ozone is generated in order to prevent ozone from leaking into the outside space.

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

In other words, when ozone is decomposed by an odor absorbing and decomposing section provided downstream of the discharge electrode section, the ozone decomposition ability of the odor absorbing and decomposing section must be designed to be sufficiently large compared to the ozone generating ability of the discharge electrode section. Enlarge the disassembly section (
In general, it is necessary to sufficiently expand the area of the odor absorbing and decomposing part. Of course, if the ozone generation capacity of the discharge electrode section is reduced, there is no need to increase the size of the odor absorption and decomposition section, but this naturally reduces the ability of ozone to decompose odor components, and the accumulation of odor components in the odor absorption and decomposition section results in the odor absorption. performance deteriorates over time.

On the other hand, when the electric fan for generating airflow is stopped when ozone is generated, ozone leakage from the odor absorption and decomposition part can be prevented by stopping the airflow, but ozone becomes concentrated in the discharge electrode part, and Ozone diffuses outside from the opening (on the suction side).

The present invention was made in view of these problems, and an object to be solved is to provide a deodorizing device that can prevent ozone from leaking to the outside without increasing the size of the odor absorbing and decomposing section.

[Means for Solving the Problems] The deodorizing device of the present invention includes a cylindrical case having an intake port and an air supply port and a built-in electric fan, and a discharge electrode part that is placed inside the case and generates ozone by electric discharge. , a high voltage power supply section that applies a discharge voltage to the discharge electrode section, an odor absorption and decomposition section that is disposed downstream of the discharge electrode section in the case and performs odor absorption and ozone decomposition, the electric fan and the high voltage power supply section. In the deodorizing device, the control means includes an odor absorption command unit that commands the electric fan to rotate at high speed and suppress the amount of ozone generated, and an odor absorption command unit that instructs the electric fan to rotate at a low speed and suppress the amount of ozone generated. The invention is characterized in that it has a regeneration command section that commands an increase in the amount of the regeneration.

In the high-speed operation mode in which the odor absorption command section of the E-effect control means reduces the discharge current of the discharge electrode section to reduce the amount of ozone produced and also rotates the electric fan at high speed, the passage time for ozone to pass through the odor absorption and decomposition section is Since the time period is shortened, the ozone capture rate of the odor absorbing and decomposing section decreases. However, since the amount of ozone generated itself is reduced, the amount of ozone leakage, which is the product of both, is suppressed to below the permissible level, and when the discharge is stopped, the amount of ozone leakage becomes O. Therefore, in this high-speed operation mode, the odor absorbing and decomposing section processes a large amount of air, adsorbs odor components from the large amount of air, strongly deodorizes it, and prevents ozone leakage exceeding the permissible level.

On the other hand, in a low-speed operation mode in which the odor absorbing and decomposing unit regeneration command unit of the control means increases the discharge current of the discharge electrode unit to increase the amount of ozone produced and rotates the electric fan at a low speed,
Since the passage time for ozone to pass through the odor absorption and decomposition section is extended, the ozone capture rate of the odor absorption and decomposition section increases. therefore,
Although the amount of ozone generated itself increases, the amount of ozone leakage, which is the product of both, is suppressed to below an allowable level. Therefore, in this low-speed operation mode, odor components adsorbed on the surface of the odor-absorbing and decomposing section are rapidly decomposed by high concentration ozone, regenerating the odor-absorbing and decomposing section, and leakage of ozone exceeding the permissible level is prevented. Furthermore, since the air flow is maintained at a low speed, ozone is also prevented from leaking from the upstream opening of the case.

[Example] (First Example) An example 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 the resin case 1 is equipped with an electric fan 2, a discharge electrode section 3, and an odor absorption and decomposition section 4 from the upstream side. It is installed inside the chest.

The electric fan 2 consists of a sirocco fan incorporating a variable speed DC brushless motor, and the discharge electrode section 3 consists of a pair of electrodes (not shown) facing each other with a predetermined discharge gap in between.

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

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

The control means 6 includes a power switch 61, a start switch 62,
It consists of a regeneration switch 63, a microcomputer 64, an oscillator 65, a power amplifier 66, and a stop switch 67. Microcomputer 64
constitutes the odor absorption command section and the regeneration command section in the present invention, and receives input signals from the above-mentioned switches and sets the oscillation frequency of the multi-vibrator type oscillator 65 and the rotation speed of the electric fan 2 to two levels, respectively. It has a switching function.

The operation of this deodorizing device will be explained based on the flowchart of the microcomputer 64 shown in FIG.

First, the necessary parts of the microcomputer 64 are reset to their initial states by turning on the power switch 61 (510), and the process waits until the starting switch 62 is turned on (312).

When the start switch 62 is turned on (312>), the electric fan 2 is rotated at about 1 soorpm to generate a high-speed airflow flowing from the intake port 11 to the air supply port 12, and at the same time, the oscillator 65 is caused to oscillate at 400 Hz (314 ).As a result, the 400H2 pulse signal output from the oscillator 65 is power amplified by the power amplifier 66, and then sent to the high voltage power supply section 5.
The voltage is increased to a predetermined voltage value to become a discharge voltage, which is applied to the electrode pair of the discharge electrodes 3. By applying this discharge voltage, a corona discharge occurs between the electrode pair of the discharge electrode 3, and ozone is generated in the air flow. The odor absorbing and decomposing section 4 adsorbs odor components and ozone, but since the amount of ozone produced is at a relatively low level, when there are many odor components, the odor components accumulate in the odor absorbing and decomposing section. Since the airflow is high speed, the time for ozone to pass through the odor absorption and decomposition section is short, but since the amount of ozone produced is small, the ozone is captured and decomposed in the odor absorption and decomposition section 4, and as a result, the ozone leaking from the odor absorption and decomposition section 4 is suppressed below acceptable levels.

Next, a regeneration switch 63 commands regeneration of the odor absorbing and decomposing section 3.
It is checked (316) whether or not the activated carbon regeneration signal has been input (that is, whether the activated carbon regeneration signal has been input). to oscillate (318). As a result, the 1800H2 pulse signal output from the oscillator 65 is power amplified by the power amplifier 66, and then boosted to a predetermined voltage value by the high voltage power supply section 5 to become a discharge voltage, which is applied to the electrode pair of the discharge electrode 3. Ru.

By applying this discharge voltage, a corona discharge occurs 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 odor components adsorbed by the odor absorbing and decomposing section 4 and regenerating the odor absorbing and decomposing section 4. At this time, since the airflow is at a low speed, it takes a long time for ozone to pass through the odor absorbing and decomposing section 4, and the ozone is sufficiently captured and decomposed by the odor absorbing and decomposing section 4. As a result, even though the amount of ozone produced is large, the amount of ozone leaking from the odor absorbing and decomposing section 4 is suppressed to below an allowable level.

The low-speed operation mode shown in step 18 is executed for a predetermined period of time (320>), and the process returns to Sl4.

To stop the operation, the interrupt routine (see FIG. 3) is started by turning on the stop switch 67, the electric fan 2 is stopped, and 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, instead of changing the oscillation frequency, the discharge voltage value may be changed to control the amount of ozone produced.

Further, in 314, the power supply to the discharge electrode section 3 may be interrupted.

(Second Embodiment) In this embodiment, in the deodorizing device of the first embodiment, switching between the high speed operation mode (314) and the low speed operation mode (S18> This is carried out based on a signal from an odor sensor (not shown) provided downstream, and the device configuration is configured by adding the above odor sensor to the first embodiment (see Fig. 1). The output signal of the odor sensor is amplified and A/D converted, and sent to the microcomputer 6 as a digital odor 1 bite signal (hereinafter referred to as concentration signal).
4 is input.

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

First, the routine is started by turning on the power switch 61, and after initial setting, it waits for the input of a start signal, and when the start signal is input (330), the concentration signal of the odor sensor is read <332>.

Next, if the concentration signal is less than or equal to the preset minimum allowable concentration DL (334), the electric fan 2 is stopped and the discharge is stopped (338). If the allowable concentration DL is exceeded (S
34), the density signal is compared with a preset maximum density DH (336).

Then, if the concentration signal is less than or equal to the maximum concentration DI-1,
The electric fan 2 is rotated at about 180 rpm to generate a high-speed airflow, and at the same time, the oscillator 65 is caused to oscillate at 400 H2 (S14).

On the other hand, if the concentration signal exceeds the maximum concentration DH, the electric fan 2 is rotated at about 40 rpm to generate a low-speed air flow, and at the same time, the oscillator 65 is caused to oscillate at 1800H7 (318).

To stop the operation, an interrupt routine (see FIG. 3) is started by turning on the stop switch 67, the electric fan 2 is stopped, the discharge is stopped (322), and the routine is ended.

(Third Embodiment) In this embodiment, in the deodorizing apparatus of the first embodiment, switching between the high-speed operation mode (314) and the low-speed operation mode (818> (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 explained with reference to the flowchart shown in FIG.

First, the routine is started by turning on the power switch 61, and after initial setting, waits for input of a start signal, and when the start signal is input (S40), the electric fan 2 is turned on to about isoor.
It rotates at pm to generate a high-speed airflow, and at the same time causes the oscillator 65 to oscillate at 400H2 (S42). and,
Start the high-speed operation timer set to a predetermined time (for example, 1 hour)! (844), and waits until this high-speed operation timer ends (S46). When the high-speed operation timer expires, the electric fan 2 is rotated at approximately 40 rpm to generate a low-speed air flow, and at the same time, the oscillator 65 is rotated at approximately 180 rpm.
0) -1z (S48).

Then, a low-speed operation timer set to a predetermined time (for example, 10 minutes) is started (S50), and the process waits until the low-speed operation timer ends (352). When the high-speed operation timer expires, the process returns to 342.

To stop the operation, an interrupt routine (see FIG. 3) is started by turning on the stop switch 67, the electric fan 2 is stopped, the discharge is stopped (S22), and the routine is ended.

[Effect of the Invention 1] As explained above, in the deodorizing device of the present invention, the control means includes a suction command unit that commands high speed rotation of the electric fan and suppression of ozone generation amount, and a suction command unit that commands high speed rotation of the electric fan and suppression of ozone generation amount. Since it has a regeneration command unit that commands an increase in the amount,
When the electric fan rotates at high speed, the odor absorbing and decomposing section adsorbs odor components from a large amount of air, powerfully deodorizing it and preventing ozone from leaking. In addition, when the electric fan rotates at low speed, odor components adsorbed on the surface of the odor absorbing and decomposing part are rapidly decomposed by relatively high concentration of ozone, powerfully regenerating and sterilizing the odor absorbing and decomposing part, and preventing 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 explanation of drawings]

FIG. 1 is a block diagram of a deodorizing device according to an embodiment of the present invention, FIGS. 2 and 3 are flow charts showing its operation, and FIG.
The figure is a timing chart showing changes in the rotational speed of the electric fan 2 and the amount of ozone produced, and FIGS. 5 and 6 are flowcharts showing other embodiments. 1... Case 2... Electric fan 3... Discharge electrode section 4... Odor absorption and decomposition section 5... High voltage power supply section 6... Control means (odor absorption command section and regeneration command section) 2nd Figure 3 Figure 4 Sword blade Figure 5

Claims (1)

[Claims] (1) A case with an inlet and an air inlet and a built-in electric fan, a discharge electrode part that is installed inside the case and generates ozone through discharge, and a high-voltage power supply part that applies a discharge voltage to the discharge electrode part. and an odor absorbing and decomposing section disposed downstream of the discharge electrode section in the case to perform odor absorption and ozone decomposition, and a control means for controlling the operation of the electric fan and the high voltage power supply section, The control means may include an odor absorption command unit that commands the electric fan to rotate at high speed and suppress the amount of ozone generated, and a regeneration command unit that commands the electric fan to rotate at a low speed and increase the amount of ozone generated. Characteristic deodorizing equipment.