JPH09313585A - Air cleaner with ozone generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve safety in stopping of an air cleaner with ozone generator by continuing air blowing for a prescribed time after the ozone generating means is stopped and transferring residual ozone left in an air passage to an ozone decomposing means to decompose ozone. SOLUTION: During this air cleaner is in operation, a fan 1 rotates in a prescribed speed and an ozone generator generates ozone. Thus, air containing an odor component taken in through an air suction port 10 is guided into a deodorizing chamber 5 via the ozone generator 4 and oxidized by filled ozone 7 to be deodorized to a nonodoring component 8. Residual ozone which did not participated in deodorizing is decomposed in an ozone decomposing filter to be harmless and exhausted through air exhaust port 9 with a nonodoring component 8. An inertial rotation function by dead weight is given to the fan 1 to keep running after stopping operation in a rotation number substantially the same as that in the normal operation. Consequently residual ozone in stopping is transferred to the ozone decomposing filter even after stopping operation to be harmless to improve safety.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air cleaning device for removing at least one of dust, odor, gas and bacteria in environment such as working space and living space. In particular, the present invention relates to a device configuration that safely handles ozone in a device that uses ozone to deodorize and disinfect.

[0002]

2. Description of the Related Art A conventional air purifying apparatus equipped with an ozone generator that uses ozone to deodorize and sterilize is, for example, as disclosed in Japanese Utility Model Laid-Open No. 25035/1990, corona discharge by high voltage. A deodorizing chamber is provided on the downstream side of the inflowing air of the ozone generator, and the air containing the odor and the ozone generated by the ozone generator are passed through the deodorizing chamber by the air blower to deodorize and sterilize the air. However, since ozone is harmful to the human body, the air containing ozone deodorized and sterilized is not exhausted as it is, but is decomposed and exhausted by ozone decomposing means such as an ozone decomposing filter. FIG. 11 shows a conventional air purifier with an ozone generator. A conventional air purifying apparatus with an ozone generator uses a fan 1 as a blowing unit, sends air sucked from an air suction port 10 to a deodorizing chamber 5 together with ozone generated by an ozone generating unit 4, and a malodorous component that flows in along with the air. To decompose and deodorize. At this time, bacteria in the air are also sterilized by the sterilizing action of ozone. Deodorization chamber 5
The air inside is sucked into the fan 1 through the ozone decomposing means 3, whereby ozone is decomposed by the ozone decomposing means 3, and deodorized and sterilized air is discharged from the air outlet 9. FIG. 12 is a block diagram showing a device configuration of a conventional air cleaning device with an ozone generator. The control circuit is blower means 1
Is started and stopped, and the ozone generation means 4 is started and stopped. The ozone decomposing means 3 uses an ozone decomposing filter utilizing a chemical action and does not require a power source, so that ozone contained in the air is decomposed only by passing deodorized and sterilized air by the blowing means. FIG. 13 shows an operation flowchart of a conventional air purifier with an ozone generator.
When "operation" is selected, air blowing and ozone generation are performed, and when "stop" is selected, both ozone generation and air blowing are stopped at the same time.

[0003]

In the above prior art, since the blowing of air is stopped at the same time as the generation of ozone is stopped, ozone having a larger specific gravity than the air remaining in the deodorization chamber flows backward and does not pass through the ozone decomposing means. There was a risk that it would flow out from the air intake. Therefore, the ozone concentration may be locally increased below the air suction port, which may cause a harmful state to the human body.

An object of the present invention is to provide an air purifying apparatus with an ozone generator, which can prevent ozone from flowing out of the air purifying apparatus at the time of stoppage and is excellent in safety.

[0005]

In order to solve the above-mentioned problems, the present invention provides an air purifying apparatus with an ozone generator, comprising:
An air flow path from the suction port to the blowout port, an ozone generating means for supplying ozone to the air sucked from the suction port, and an ozone decomposing means arranged on the downstream side of the ozone generating means in the air flow path, An air blower for forming an air flow from the suction port to the blowout port is provided in the air flow path, and a controller for controlling the ozone generator and the blower. The blower continues blowing for a predetermined time even after the ozone generator is stopped. It is characterized by being configured as follows.

Since the air blowing means continues to blow air for a predetermined time after the ozone generating means is stopped when the operation is stopped, the residual ozone in the air flow path can be guided to the ozone decomposing means, and the residual ozone is effectively decomposed. can do.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIG.
This will be described with reference to FIG. 1 to 10 apply the present invention to a ceiling-embedded cassette type air cleaning device having a structure in which a suction port 10 and a blow-out port 9 are opened in the ceiling surface 30 by being embedded above a ceiling surface 30 in a room. It was done.

FIG. 1 is a sectional view showing a first embodiment of an air cleaning apparatus with an ozone generator according to the present invention. The air purifying apparatus according to the present embodiment has a pre-filter 2 for removing coarse dust.
0, an ozone generator 4, an ozone decomposing filter 3, and an inner case 22 that houses the control circuit 11, and an inner case 22, an outer case 12 that houses the fan 1 and the motor 2.

In the inner case 22, the air suction port 10 opened to suck the air in the room on the side facing the room when the air cleaning device is mounted on the ceiling, that is, the lower surface side.
And a partition plate 22 is provided inside the inner case 22.
3 chambers 2 in the direction of air flow due to a and 22b
It is partitioned so that 4, 5, and 26 are formed to communicate with each other. Pre-filter 20 provided in the air suction port 10
Removes relatively large dust (cotton dust, etc.) in the sucked air. The ozone generator 4 and the control circuit 11 are mounted in the first chamber 24 formed by the suction port 10 and the first partition plate 22a. In the present embodiment, the ozone generator 4 is the electrostatic precipitator 16, and a high voltage of about 10 kV is applied to the ionization line 18 of the ionization section 17 to generate corona discharge and ionize the air to remove air from the air. Converts oxygen molecules into ozone. In order to efficiently generate ozone, a negative high voltage of -9 kV is applied to the ionization line 18 in this embodiment. Ozone generator 4
Is not limited to the electrostatic precipitator 16, but one that simply ionizes air by corona discharge to generate ozone, a creeping discharge is generated on the surface of the dielectric (insulator), and air is ionized by this electric field to generate ozone. It may be one that generates ozone, or one that generates ozone by ultraviolet rays such as a germicidal lamp or an ozone lamp. When the electrostatic precipitator 16 is used as the ozone generator 4, even small dust in the air can be removed, so that dust can be prevented from adhering to the surface of the ozone decomposing filter 3 provided on the downstream side, and the life of the ozone decomposing filter 3 can be reduced. Can be extended. In addition, the structure of the ozone generator 4 is downsized and simplified when the one that ionizes the air to generate ozone by simply corona discharge or creeping discharge and the one that generates ozone by ultraviolet rays such as a germicidal lamp or an ozone lamp are used. Was converted into
The size and weight of the air purifier can be reduced.

The control circuit 11 of the present embodiment has a microcomputer (not shown) and storage means (not shown) such as an EEPROM. The microcomputer controls the operation / stop of the motor 2 for driving the fan 1 or the rotation control such as speed control and the operation / stop of the ozone generator 4 according to the program stored in the storage means. Since it is difficult for the ozone generator 4 to control the ozone generation amount continuously or stepwise, the ON / OFF control of only the operation / stop is performed in the present embodiment. The operation of the air cleaning apparatus of this embodiment is performed by a wired or wireless remote controller (not shown).

A second chamber 5 formed between the first partition plate 22a and the second partition plate 22b is used as a deodorizing chamber 5, and ozone generated by an ozone generator 4 in the deodorizing chamber 5 is used. Air intake port 10
The air sucked from the air is mixed, and the malodorous component 6 contained in the air is decomposed while passing through this space by the chemical action of ozone. At this time, bacteria and microorganisms in the air can be killed by the sterilizing action of ozone, and deodorization and sterilization are also performed.

The second partition plate 22b and the inner case 22
An ozone decomposing filter 3 for decomposing ozone is attached to the third chamber 26 formed between the upper surfaces of the above. Two
The air deodorized and sterilized in the third chamber 5 is decomposed by the catalytic action of the ozone used in the ozone decomposing filter 3 to become safe clean air containing no harmful substances.
This clean air is sucked into the fan 1 through the opening 28 on the upper surface side of the inner case 22.

In the present embodiment, since the air purifying device is attached to the ceiling surface 30 in the room, the prefilter 20, the electrostatic precipitator 4, and the ozone decomposing filter 3 are all taken out in the downward direction of the inner case 22. It is installed so that it can be easily maintained and inspected.

The outer case 12 is provided around the inner case 22.
Is provided, and the space between the inner case 22 and the outer case 12 has a function as a duct 40 for guiding the air blown from the fan 1 downward toward the outlet 9. Therefore, in this embodiment, the air flow path has a shape in which the center leg of the “m” is rotated, and the air flows upward in the inner case 12 and then passes through the duct 40. And flows downward. In the present embodiment, both the inner case 22 and the outer case 12 have an outer shape that is a substantially square shape when viewed from the lower surface side, and the gap between the inner case 22 and the outer case 12 is a bubble on each side of the substantially square shape. The sides of the substantially square are provided with substantially the same dimensions so that the amount of air blown from the mouth 9 is substantially the same. The wind direction plate 42 provided in the air outlet 9 guides the blown air in a direction away from the air inlet 10.
Prevents short circuit of air flow and spreads clean air widely in the room.

In the present embodiment, even if the fan 1 is given an inertial force and the power supply to the motor 2 and the ozone generator 4 is stopped, the fan 1 remains substantially until the ozone concentration in the deodorization chamber becomes zero. It is configured to maintain the rotation speed during normal operation. Therefore, even after the ozone generator 4 is stopped, ventilation is continued for a predetermined time.

When the air cleaning apparatus of this embodiment is operated,
The fan 1 rotates at a predetermined speed and the ozone generator 4 generates ozone. As a result, the air containing the malodorous component 6 taken in from the air suction port 10 becomes the ozone generator 4
Through the deodorizing chamber 5. The deodorization chamber 5 is filled with ozone 7, where the malodorous component 6 becomes a non-odorous component 8 due to the chemical action (oxidation action) of the ozone 7, and deodorization is performed. Further, some of the malodorous components are adsorbed by the ozone decomposition filter 3 and removed. Residual ozone not involved in this reaction is decomposed and rendered harmless by passing through the ozone decomposition filter 3 composed of an ozone decomposition catalyst or the like. At this time, some of the malodorous components adsorbed on the ozone decomposing filter 3 are decomposed into non-malodorous components by ozone, so that clogging of the ozone decomposing filter 3 is also prevented. As a result, the clean air from which harmful ozone has been removed is guided to the air blowing means including the motor 2 and the fan 1,
The air is discharged from the air outlet 9 to the outside of the device. Note that the malodorous component 6, ozone 7, and non-malodorous component 8 are actually molecular-sized and invisible to the naked eye, but in order to make them easy to understand in the drawings of each embodiment of the present application, black circles, white circles, etc. It is indicated by.

In this embodiment, the fan 1 is the electrostatic precipitator 1
6 and the ozone decomposing filter 3 are provided on the downstream side, dust can be prevented from adhering to the fan 1, and the fan 1 can be prevented from being corroded by ozone.

FIG. 2 shows an operation time chart of the apparatus according to the first embodiment. When the operation of the apparatus is stopped or the power supply is stopped due to a power failure or the like, the power supply to the ozone generator 4 and the motor 2 is stopped, but the high concentration ozone 7 is naturally decomposed in the deodorization chamber 5. Remains. In the present embodiment, even if the fan 1 has an inertial force due to its own weight and the power supply to the motor 2 and the ozone generator 4 is stopped, the fan 1 remains substantially until the ozone concentration in the deodorization chamber becomes zero. Since it is configured to continuously maintain the rotation speed during normal operation, the residual ozone 7 is prevented from flowing backward from the air suction port 10 to the outside of the apparatus without passing through the ozone decomposing means 3. The residual ozone 7 can be effectively decomposed by the ozone decomposer 3.

A second embodiment of the present invention will be described with reference to FIG. FIG. 3 is a sectional view showing the second embodiment. The configuration of this embodiment is the same as that of the first embodiment except that the weight 14 is attached to the fan 1. Since ozone 7 is heavier than air, in the case of the ceiling-embedded cassette type in which the ozone generator 4 and the deodorization chamber 5 are formed above the air suction port 10, the reverse flow of the residual ozone 7 from the air suction port 10 after the device is stopped is remarkable. Appear in. Further, the amount of remaining ozone varies depending on the size of the deodorization chamber 5 and the concentration of ozone 7 used. Therefore, depending on the installation method and structure of this device, it is necessary to continue the rotation of the fan 1 after operation stop and adjust the time for blowing air. Therefore, in the present embodiment,
By attaching the weight 14 to the fan 1 and adjusting the weight of the weight 14, the time during which the rotation of the fan 1 is continued,
That is, the time during which the ventilation can be continued can be adjusted. The weight 14 may be provided continuously over the entire circumference of the impeller of the fan 1, or may be provided at a plurality of positions at a position where the impeller of the fan 1 is balanced.

A third embodiment of the present invention will be described with reference to FIG. FIG. 4 is a sectional view showing the third embodiment. The configuration of this embodiment is the same as that of the first embodiment except that the flywheel 13 is mounted on the motor 2. Like the second embodiment, the present embodiment is also configured such that the rotation of the fan 1 is continued after the operation is stopped and the time for blowing air can be adjusted. In the present embodiment, a flywheel 13 is provided on the rotating shaft of the motor 2, and the mass or diameter of the flywheel 13 is adjusted to adjust the moment of inertia, thereby making it possible to adjust the time during which the rotation of the fan 1 can be continued. Is.

A fourth embodiment of the present invention will be described with reference to FIG. FIG. 5 is a cross-sectional view of the blower unit showing the fourth embodiment. Except for the blowing means, it is the same as that of the first embodiment, so the illustration is omitted. In the present embodiment, by using materials having different specific gravities for the blades of the fan 1 and the core plate that supports the blades, sufficient inertial force can be obtained and rotation can be continued without using additional parts such as weights and flywheels. It is configured as follows. As a specific example, by forming the core plate with aluminum and the blades with iron, it is possible to suppress the mass of the fan 1 while providing sufficient inertia.

A fifth embodiment of the present invention will be described with reference to FIG. The hardware configuration of this embodiment is the same as that of the first embodiment. The present embodiment is configured by software so that the fan 1 can continue to rotate even after the ozone generator 4 is stopped to continue blowing air. FIG. 6 shows an operation time chart of the present embodiment. In this embodiment, a program stored in the storage means in the control circuit 11 provides a time difference between the stop signal to the ozone generator 4 and the stop signal to the motor 2 of the blower when the air cleaning device is stopped. is there. The control circuit 11 receives a stop signal for the air purifying device from a remote controller (not shown),
A stop signal is supplied to the ozone generator 4 substantially at the same time as this signal, and a stop signal is supplied to the motor 2 after a time sufficient for the concentration of the residual ozone 7 in the deodorization chamber 5 to reach zero. As a result, the rotation of the fan 1 is continued even after the ozone generator 4 is stopped, and the residual ozone is forcibly guided to the ozone decomposition filter 3 and decomposed. In the present embodiment, the time difference between the stop signal to the ozone generator 4 and the stop signal to the motor 2 of the blower can be arbitrarily set by software, and by selecting the optimum value, the time difference after the remaining ozone disappears Unnecessary fan operation can be prevented and an energy saving effect can be obtained.

A sixth embodiment of the present invention will be described with reference to FIGS. FIG. 7 is a sectional view showing the sixth embodiment. The hardware configuration of the present embodiment is the same as that of the first embodiment except that the ozone concentration detecting means 15 is attached to the outlet 9. In the present embodiment, the ozone decomposing process status in the ozone decomposing filter 3 is monitored by the ozone concentration detecting means 15 installed in the outlet 9.

FIG. 8 is an operation flowchart showing the sixth embodiment. When the operation is stopped by the switch of the remote controller after the operation is started (step 600), it is determined that the operation is stopped in step 601, and the power supply to the motor 2 and the ozone generator 4 is stopped (step 61).
1). At this time, the blown air is continued due to the inertia of the fan 1, and the residual ozone 7 is guided to the ozone decomposition filter 3 and decomposed. When it is determined in step 601 that the vehicle is operating, the ozone concentration detecting means 15 monitors the ozone concentration in the exhaust gas and determines whether the ozone concentration is normal (step 602). When it is determined that the concentration is abnormal, the abnormality is displayed (step 612) and the operation of the motor 2 and the ozone generator 4 is stopped (step 613). Further, the rotation speed of the fan 1 or the current of the motor 2 of the blowing means is detected, and it is judged whether the rotation speed or the current is normal (step 603). When it is out of the specified range, it is judged that the blowing means is abnormal. In this case, however, an abnormality is displayed (step 612) and the operation is stopped (step 613). Examples of this abnormal display include a lamp display and a buzzer or voice warning. If it is determined to be normal in step 603, ozone generation is continued (step 604) and air blowing is continued (step 60).
5) and returns to step 601. As a result, even if an abnormality occurs in the air blowing means, ozone generation is stopped, and safety is improved. In the present embodiment, the ozone concentration detecting means 15 can prevent the residual ozone 7 during operation from flowing out of the apparatus.
Can be prevented from being decomposed and released to the outside of the apparatus during operation, or the ozone 7 is not guided to the ozone decomposing means 3 due to the deterioration of the performance due to the abnormality of the fan 1 and can flow backward from the air suction port 10 during operation. Therefore, in the present embodiment, it is possible to prevent ozone outflow during operation and at the time of operation stop,
It is possible to obtain an air cleaning device with an ozone generator that is excellent in safety and reliability.

A seventh embodiment of the present invention is shown in FIGS.
This will be described below. FIG. 9 is a sectional view showing the seventh embodiment. The hardware configuration of the present embodiment uses the electrostatic precipitator 16 having the ionization section 17 as the ozone generator 4 in the sixth embodiment. Also in the present embodiment, the ozone decomposing process status in the ozone decomposing means 3 is monitored by the ozone concentration detecting means 15 installed in the outlet 9. In the present embodiment, the ozone generated in the ionization section 17 of the electrostatic precipitator 16 is guided to the deodorization chamber 5 by the blowing means.

FIG. 10 is an operation flowchart of the seventh embodiment. This flow is for determining whether the ionization current is normal or abnormal (step 703) instead of the normal or abnormal determination (step 603) of the blowing means in FIG. 8 of the sixth embodiment. Operation other than 6th
This is the same as the embodiment. When the electric dust collector 16 is used as the ozone generator 4, it exerts a high effect on dust collection of inflowing air. The ionization part 17 of the electrostatic precipitator 16 is composed of a ground electrode and an ionization wire 18 for corona discharge. Since the amount of electric power due to corona discharge increases as the length of the ionization line 18 increases, the load of the high-voltage generation power supply that supplies a high voltage to the ionization line 18 is proportional to the length of the ionization line 18. When the ionization wire 18 is broken due to long-term use, the length of discharge is shortened, and the load on the high-voltage generation power source is reduced. At this time, the ionization current rises, and the ozone 7 generated from the ionization section 17 also rises. In the present embodiment, the increased ozone 7 is detected by the ozone concentration detecting means 1
5, the microcomputer of the control circuit 11 determines whether the ionization current of the ionization section 17 is in the normal range, and it is estimated that the ozone concentration rises abnormally, and the ozone concentration detection means 15 detects the abnormal ozone concentration. An error is displayed before detection and operation is stopped. With this device configuration, it is possible to safely operate the air cleaning device with the ozone generator equipped with the electrostatic precipitator.

Although the fan and the motor are used as the blowing means in the fifth and sixth embodiments, the present invention is not limited to this, and a blowing means using ion wind may be used. When the air blowing means using the ion wind is used in the sixth embodiment, the air blowing of the air blowing means is continued for a predetermined time even after the ozone generating means is stopped by software when the operation is stopped.

The present invention is not limited to the above-mentioned respective embodiments, but has an "I" -shaped or "L" -shaped air flow path, and the ozone generating means from the upstream side in the air flow path, A floor-standing type air cleaning device provided with an ozone decomposing filter and a blowing means may be configured to continue blowing air for a predetermined time even after the ozone generator is stopped.

[0029]

According to the present invention, since the air is continuously blown for a predetermined time even after the operation is stopped, the residual ozone can be guided to the ozone decomposing filter and decomposed, and the air purifying apparatus with an ozone generator is excellent in safety. Can be obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a configuration of an air cleaning device with an ozone generator according to a first embodiment of the present invention.

FIG. 2 is an operation time chart of the air cleaning device with an ozone generator according to the first embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a configuration of an air purifier with an ozone generator according to a second embodiment of the present invention.

FIG. 4 is a cross-sectional view showing the configuration of an air purifier with an ozone generator according to a third embodiment of the present invention.

FIG. 5 is a cross-sectional view of a blowing unit showing a configuration of an air purifier with an ozone generator according to a fourth embodiment of the present invention.

FIG. 6 is an operation time chart of the air cleaning device with an ozone generator according to the fifth embodiment of the present invention.

FIG. 7 is a cross-sectional view showing the configuration of an air purifier with an ozone generator according to a sixth embodiment of the present invention.

FIG. 8 is an operation flowchart of an air purifying apparatus with an ozone generator according to a sixth embodiment of the present invention.

FIG. 9 is a sectional view showing the configuration of an air purifier with an ozone generator according to a seventh embodiment of the present invention.

FIG. 10 is an operation flowchart of an air purifying apparatus with an ozone generator according to a seventh embodiment of the present invention.

FIG. 11 is a cross-sectional view showing the configuration of a conventional air purifying apparatus with an ozone generator.

FIG. 12 is a block diagram showing a configuration of a conventional air purifier with an ozone generator.

FIG. 13 is an operation flowchart of a conventional air purifier with an ozone generator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Fan 2 ... Motor 3 ... Ozone decomposing means 4 ... Ozone generator 5 ... Deodorization chamber 6 ... Odor component 7 ... Ozone 8 ... Non-odor component 9 ... Air discharge port 10 ... Air suction port 11 ... Control circuit 12 ... Outer case 13 ... Flywheel 14 ... Weight 15 ... Ozone concentration detection means 16 ... Electrostatic precipitator 17 ... Ionization part 18 ... Ionization line

Claims (1)

[Claims] 1. An air flow path from an inlet to an outlet, ozone generating means for supplying ozone to the air sucked from the inlet, and an air flow path disposed downstream of the ozone generating means in the air flow path. The ozone blowing means includes an ozone decomposing means provided, a blowing means for forming an air flow in the air flow path from the suction port to the blowing port, and a control means for controlling the ozone generating means and the blowing means. An air purifier with an ozone generator, wherein the means is configured to continue blowing air for a predetermined time even after the ozone generating means is stopped.