JPH0975436A - Air purifier and ozone detection sensor - Google Patents

Abstract

(57) [Summary] [Purpose] In an air purifier with a deodorizing function used to improve the environment of a living space or a working space, deodorization is performed by a built-in ozone generator and ozone decomposition catalyst. There has been a problem that the ozone decomposing catalyst deteriorates as it is used, its ozone decomposing ability decreases, and the amount of ozone discharged without being decomposed increases unknowingly. Therefore, there is a demand for an air purifying device with excellent safety that can detect a decrease in ozone decomposing ability. An object of the present invention is to provide an air purifying device having an ozone generator in an air flow path from an intake port to an exhaust port, and to intake ozone generated from the ozone generator by having an opening communicating with the intake port. An ozone chamber for adding air sucked from the mouth, a first chamber communicating with the ozone chamber for discharging the ozone-added air from the first exhaust port through the first filter, and 1 communicating with exhaust port 1
A second chamber for discharging the air passing through the filter from the second exhaust port via the second filter, and the air discharged from the second exhaust port is discharged from the exhaust port. To be achieved.

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, and more particularly to an air cleaning device having a structure suitable for ozone deodorization and a sensor for detecting the amount of harmful ozone exposure.

[0002]

2. Description of the Related Art An air purifying device having a function of improving the environment of a living space or a working space and reducing odor and airborne bacteria in the air is used. This device usually contains an ozone generator and an ozone decomposition catalyst, and deodorization is performed by the built-in ozone generator and ozone decomposition catalyst. Related items include Jitsukaihei-25035.

[0003]

An air cleaning device having a function of improving the environment of a living space or a working space and reducing odors and airborne bacteria in the air is used. In such a device, deodorization is performed by the built-in ozone generator and ozone decomposing catalyst, but when the ozone decomposing catalyst deteriorates, harmful ozone generated in the device as the deterioration progresses is generated by the ozone decomposing catalyst. There is a risk that ozone will be inadvertently discharged from the device to the living space or the work space because it will not be decomposed and the amount of ozone flowing out will increase.

An object of the present invention is to provide an air purifying device which is excellent in safety by reducing the risk that harmful ozone is inadvertently discharged from the device to the above-mentioned space even if the ozone decomposing catalyst deteriorates. Is to provide

[0005]

In order to achieve the above object, the present invention provides an air purifying device having an ozone generator in an air passage extending from an intake port to an exhaust port, and an opening communicating with the intake port. An ozone chamber which has ozone added from the ozone generator to the air sucked from the intake port, and an ozone-added air which communicates with the ozone chamber
A first chamber that is exhausted from the first exhaust port through the second filter, and air that is in communication with the first exhaust port and that has passed through the first filter is passed through the second filter through the second exhaust port. It is achieved by providing a second chamber for exhausting the air from the second exhaust port and configuring the air exhausted from the second exhaust port to be exhausted from the exhaust port.

[0006]

The ozone generator generates ozone, and the ozone chamber deodorizes and sterilizes the air taken in by the chemical action of the generated ozone. When the air containing ozone is passed through the catalyst, the ozone changes into oxygen due to the catalytic action, and the ozone concentration in the discharged air can be reduced.

Since ozone is harmful to the human body depending on the concentration and the time of exposure to ozone, it is important to decompose ozone and reduce the amount of emission from equipment.

[0008]

Embodiments of the present invention will be described below with reference to FIGS. A first embodiment of the present invention will be described with reference to FIGS. 1, 5, 6 and 7. FIG. 1 is a cross-sectional view showing a case where the air cleaning device of this embodiment is attached to the ceiling in a room.
The air in the room is reduced in coarse dust by the pre-filter 21, sucked from the intake port 11 into the ozone chamber of the air cleaner, and passes through the ozone generator 35 to add ozone. The odorous component contained in the air flows into the first chamber 31 communicating with the ozone chamber together with the ozone added by the ozone generator 35. The air that has flowed into the first chamber 31 is processed by the first filter 33 and flows into the second chamber 32. The air that has flowed into the second chamber 32 is processed by the second filter 34 and is exhausted from the exhaust port 12 via the air blowing unit 22.

The first filter 33 and the second filter 34
Is a filter with a catalyst. When the same catalyst is used for the first filter 33 and the second filter 34,
Deodorization is performed as follows. The air containing the malodorous components and the ozone generated by the ozone generator 35 is the first filter 33.
Although the malodorous component is reduced by the catalytic reaction of No. 3, the residual malodorous component and ozone flow into the second chamber 32, and the malodorous component is further reduced by the catalytic reaction in the second filter 34. Since the first filter 33 is close to the intake port 11, there is a high risk that it will be damaged by foreign matter or tools that have entered the intake port 11, but in the present embodiment, even if the first filter 33 should be damaged, the second filter 33 will be damaged. It can be deodorized by the filter 34. Further, ozone harmful to the human body is decomposed by the second filter 34 even if the first filter 33 is damaged. Also,
Since the first filter 33 and the second filter 34 are separated by the second chamber 32, the risk of being damaged at the same time can be avoided, the deodorizing function can be maintained, and the risk of ozone outflow can be avoided. .

The first filter 33 and the second filter 34
When different catalysts are used, the deodorization is performed as follows. A platinum-based catalyst is used for the first filter 33, and the second filter
When a manganese-based catalyst is used for the filter 34 of No. 1, when formaldehyde gas and ammonia, methyl mercaptan, acetaldehyde, hydrogen sulfide, etc. are contained as malodorous components in the air, the ozone generated by the ozone generator 35 causes the first filter 33. Formaldehyde gas is deodorized by the second filter 34, and ammonia, methyl mercaptan, acetaldehyde, hydrogen sulfide, etc. are deodorized by the second filter 34. In the present embodiment, since ozone and malodorous components can be mixed and made uniform in the second chamber 32, the second filter 34 can efficiently deodorize by catalytic reaction, and only a conventional single catalyst is used. It can deodorize more efficiently than other products.

In this embodiment, since the ozone precipitator 35 also serves as an electric precipitator, it has the capability of removing dust in addition to the capability of generating ozone. Therefore, the first filter 33 and the second filter 34 have When a catalyst is used, it is possible to prevent dust such as cigarette smoke and mist of oil and fat contained in the inflowing air from adhering to the surface of the catalyst, and the reduction of the exposed area of the catalyst reduces the catalytic performance of the entire filter. This is prevented, and the effect of extending the life of the first filter 33 and the second filter 34 is obtained.

Next, in this embodiment, an example in which an ozone detection sensor is provided to control the air cleaning device will be described. The first sensor 41 is installed downstream of the first filter 33, and the second sensor 42 is installed downstream of the second filter 34. First
The first sensor 41 and the second sensor 42 detect the exposure amount of ozone in the air that has passed through the first filter 33 and the second filter 34, respectively. The result of detecting the exposure amount of ozone by the sensor 42 is calculated by the first control panel 51, and the second control panel 5 is calculated by the calculation result.
The alarm 53 and the operation indicator lamp 54 are output according to the outflow amount of ozone.

An example of a specific calculation is shown in FIG. An arithmetic unit using a microcomputer is stored in the first control panel 51, and the following arithmetic is cyclically performed. After the start, the state of the sensor 1 is read, and then the state of the sensor 2 is read. Next, when the state of the sensor 2 is judged and the capability of the second filter is lowered (when the sensor of FIGS. 5 and 6 is used, it is turned off), an alarm is generated by characters, figures, etc. Alarm by display or sound,
Turn off the ozone generator and then stop the fan to prevent ozone from flowing out. The fact that the fan is stopped is indicated by the blinking operation lamp. After this, the process returns to the step of reading the state of the sensor 1. When the state of the sensor 2 is judged and the capability of the second filter is normal (when the sensor of FIGS. 5 and 6 is ON, it is ON), the state of the sensor 1 is further judged. When the capacity of the filter of No. 1 is reduced (when the sensor of FIGS. 5 and 6 is used, OF
When it becomes F), an alarm display is made by characters or figures, or an alarm is made by sound. After this, the process returns to the step of reading the state of the sensor 1. When the ability of the second filter is normal (ON when the sensor of FIGS. 5 and 6 is used
If it is), the operation is continued and the operation lamp is turned on. After this, the process returns to the step of reading the state of the sensor 1. The operation lamp is also turned on when the capacity of the first filter is reduced.

A concrete example of the structure of the sensor is shown in FIGS. In the sensor of FIG. 5, the support member 61 is supported by the support portion 62,
When the supporting member 61 is broken, the switch 64 is operated by the spring 63. The supporting member 61 is a material that deteriorates and breaks when exposed to a predetermined ozone concentration and for a predetermined time,
For example, since it is made of special rubber or the like, it functions as a sensor that detects the exposure amount of ozone. The sensor of FIG. 6 has a case 70 in which holes are formed so that the air to be detected can flow back into the film 71 loaded inside, and a case 70.
A film 71 supported and loaded in the inside of the film by a film support unit 72, a light emitting unit 73 for detecting a change in transparency and color of the film 71, a light receiving unit 74, and a calculation unit 75 for calculating a detection result. The film 71 is made of a material whose transparency and color change when exposed to ozone for a predetermined period of time. As a result, the film 71 functions as a sensor that detects the ozone exposure amount by calculating the ozone concentration and operating the switch when the ozone is exposed for a predetermined time to operate the switch to change the contact output from ON to OFF.

A second embodiment of the present invention will be described with reference to FIG. FIG. 2 is a cross-sectional view showing a case where the air cleaning device of this embodiment is attached to the indoor ceiling. This embodiment has a structure in which the air in the room is deodorized and sterilized inside the device and then exhausted to the outside, and the configuration and function of the main part are the same as in the first embodiment. In this embodiment, coarse dust is reduced by the pre-filter 21 in the room air, the air is sucked from the intake port 11 into the ozone chamber of the air cleaning device, and passes through the ozone generator 35 to add ozone. The odorous component contained in the air flows into the first chamber 31 communicating with the ozone chamber together with the ozone added by the ozone generator 35. The air that has flowed into the first chamber 31 is processed by the first filter 33 and flows into the second chamber 32. The air that has flowed into the second chamber 32 is transferred to the second filter 3
4 is exhausted from the exhaust port 12 via the air blowing means 22.

In this embodiment, in addition to the effects of the first embodiment,
It is possible to suppress an increase in the gas concentration in the room.

Further, since the exhaust is deodorized, it is possible to reduce the pollution due to the exhaust odor around the outdoor exhaust port.

A third embodiment of the present invention will be described with reference to FIG. FIG. 3 is a cross-sectional view showing a case where the air cleaning apparatus of this embodiment is installed on the floor. The present embodiment has a structure in which indoor air is deodorized and sterilized inside the device, and then exhausted into the space where the device is installed, and the configuration and function of the main parts are the same as in the first embodiment. In the present embodiment, the intake port 11 is opened on the side surface of the lower part of the device, and the indoor air sucked from the intake port 11 is reduced in coarse dust by the pre-filter 21 and is sucked into the ozone chamber of the air cleaning device to generate ozone. Ozone is added by passing through the vessel 35. The odorous component contained in the air, together with the ozone added by the ozone generator 35, communicates with the ozone chamber in the first chamber 31.
Flows into. The air that has flowed into the first chamber 31 is processed by the first filter 33 and flows into the second chamber 32. The air that has flowed into the second chamber 32 is processed by the second filter 34 and is sent to the exhaust port 12 via the air blowing unit 22.
It is exhausted from. FIG. 3 shows a case where the device of this embodiment is installed in a parking lot. In this embodiment, in addition to the effects of the first embodiment, the use of a first filter and a second filter capable of decomposing nitrogen oxides and sulfur oxides in addition to ozone decomposition causes harmful effects in exhaust gas. It is possible to suppress an increase in gas concentration. Further, since the exhaust gas is deodorized, it is possible to reduce pollution due to the exhaust odor around the exhaust port.

A fourth embodiment of the present invention will be described with reference to FIG. FIG. 4 is a cross-sectional view showing a case where the air cleaning apparatus of this embodiment is installed on the floor. The present embodiment has a structure in which indoor air is deodorized and sterilized inside the device and then exhausted to the outside, and has the same configuration and function as the third embodiment except that the exhaust port 12 communicates with the outside. .

Also in this embodiment, as in the third embodiment, the first
By using a filter capable of decomposing nitrogen oxides and sulfur oxides in addition to ozone decomposition as the second filter and the second filter, an increase in harmful gas concentration in exhaust gas can be suppressed. Further, in addition to the effect of the third embodiment, it is possible to suppress the increase of the exhaust gas concentration in the room.

[0021]

According to the present invention, even if the ozone decomposing catalyst is deteriorated, harmful ozone is inadvertently kept at a high concentration and the risk of being discharged from the device to the above-mentioned space is reduced. A cleaning device can be obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an air cleaning device according to a first embodiment of the present invention mounted on a ceiling in a room.

FIG. 2 is a cross-sectional view of an air purifying device according to a second embodiment of the present invention when it is attached to an indoor ceiling.

FIG. 3 is a cross-sectional view when an air cleaning device according to a third embodiment of the present invention is installed on the floor.

FIG. 4 is a cross-sectional view when an air cleaning device according to a fourth embodiment of the present invention is installed on the floor.

FIG. 5 is a cross-sectional view showing the structure of an ozone detection sensor of the air cleaning device in the first embodiment of the present invention.

FIG. 6 is a cross-sectional perspective view showing the structure of an ozone detection sensor of the air cleaning device according to the first embodiment of the present invention.

FIG. 7 is a flowchart showing a control flow of the air cleaning device in the first embodiment of the present invention.

[Explanation of symbols]

1 ... Space 1, 2 ... Space 2, 3 ... Air flow, 10 ... Main body, 11
... Intake port, 12 ... Exhaust port, 21 ... Prefilter, 22 ...
Blower means, 30 ... Ozone, 31 ... First chamber, 32
... second chamber, 33 ... first filter, 34 ... second
, 35 ... Ozone generator, 40 ... Sensor 41 ... First sensor, 42 ... Second sensor, 50 ... Control panel 51 ... First control panel, 52 ... Second control panel, 53 ... Alarm, 54 ... Operation indicator light, 61 ... Support member, 62 ... Support part, 63 ... Spring 64 ... Switch, 70 ... Case, 71 ... Film, 72
... Film support portion, 73 ... Light emitting portion, 74 ... Light receiving portion, 75
... Calculator

Claims (4)

[Claims] 1. An air purifying apparatus having an ozone generator in an air flow path from an intake port to an exhaust port, wherein the ozone generated from the ozone generator is provided with an opening communicating with the intake port. An ozone chamber for adding air to the air sucked from the intake port, a first chamber communicating with the ozone chamber for discharging the ozone-added air from the first exhaust port through the first filter, A second chamber is provided which is in communication with the first exhaust port and which exhausts the air that has passed through the first filter from the second exhaust port through the second filter, and is exhausted from the second exhaust port. An air purifier characterized in that it is configured to discharge the discharged air from the exhaust port. 2. The air cleaning apparatus according to claim 1, wherein at least one of the first filter and the second filter is a filter having a catalyst that decomposes ozone. 3. An ozone detection sensor provided downstream of the first exhaust port or the second exhaust port, and control means for controlling the operation of the air cleaning device based on the result of ozone detection by this sensor. The air purification apparatus according to claim 1, further comprising: 4. A material that is irreversibly changed in physical properties depending on the concentration of ozone and the exposure time of ozone is used, and the exposure amount of ozone is detected by detecting the physical properties that are irreversibly changed. Ozone detection sensor.