JP3462942B2 - Air purifier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air purifier and, more particularly, to an air purifier having a structure suitable for deodorizing ozone and a sensor for detecting an exposure amount of harmful ozone.

[0002]

2. Description of the Related Art An air purifier having a function of improving the environment of a living space or working space and reducing odors and floating bacteria in the air is used. This device usually has a built-in ozone generator and an ozone decomposition catalyst, and deodorization is performed by the built-in ozone generator and the ozone decomposition catalyst. A related example is Japanese Utility Model No. 25035 and the like.

[0003]

SUMMARY OF THE INVENTION An air purifier having a function of improving the environment of a living space or working space and reducing odors and airborne bacteria in the air is used. In such a device, deodorization is performed by a built-in ozone generator and an ozone decomposition catalyst, but when the ozone decomposition catalyst deteriorates, harmful ozone generated in the device as the deterioration progresses is reduced by the ozone decomposition catalyst. There is a danger that the ozone will not be decomposed, the amount of ozone flowing out will increase, and ozone will be inadvertently discharged from the device into the living space or working space.

[0004] It is an object of the present invention to provide an air cleaning apparatus which is excellent in safety by reducing the risk of harmful ozone being inadvertently discharged at a high concentration from the apparatus into the space even if the ozone decomposition catalyst has deteriorated. Is to provide

[0005]

In order to achieve the above object, the present invention provides an air purifying apparatus having an ozone generator in an air passage from an intake port to an exhaust port, wherein the opening communicates with the intake port. an ozone chamber for adding ozone generated from the ozone generator into the air sucked from the intake port has a second air ozone communicated with the ozone chamber were added via the first filter a first chamber for discharging the first outlet, a second discharged from the second outlet of the air passing through the first filter in communication with the said first outlet via the second filter and a chamber, said first filter and said second filter
Is a filter having a catalyst for decomposing ozone,
The same catalyst is used for the first filter and the second filter.
There, or the the first filter using a platinum-based catalyst, before
Serial to the second filter using a manganese-based catalyst, the O
It is also used to Zon generator as an electric precipitator is accomplished the air discharged from the second exhaust port configured to exhaust 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 air containing ozone is passed through the catalyst, the ozone is converted into oxygen by the catalytic action, and the ozone concentration in the exhaust air can be reduced.

[0007] Since ozone is harmful to the human body depending on its concentration and the time of exposure to ozone, it is important to decompose ozone and reduce emissions from equipment.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment 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. FIG. 1 is a cross-sectional view showing a case where the air cleaning device of the present embodiment is mounted on a ceiling in a room.
The air in the room is reduced in coarse dust by the pre-filter 21, is sucked into the ozone chamber of the air cleaning device from the intake port 11, and is added with ozone by passing through the ozone generator 35. The odor 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 through the blowing unit 22.

A first filter 33 and a second filter 34
Is a filter having 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 component and the ozone generated by the ozone generator 35 is supplied to the first filter 33.
The unpleasant odor component and ozone flow into the second chamber 32 and the second filter 34 further reduces the unpleasant odor component by the catalytic reaction. Since the first filter 33 is close to the intake port 11, there is a high risk that the first filter 33 will be damaged by a foreign object or a tool that has entered through the intake port 11. However, in this embodiment, even if the first filter 33 is damaged, It can be deodorized by the filter 34. Also, ozone harmful to the human body is decomposed by the second filter 34 even if the first filter 33 is broken. Also,
Since the first filter 33 and the second filter 34 are separated from each other in the second chamber 32, the risk of breakage can be avoided at the same time, the deodorizing function can be maintained, and the risk of ozone outflow can be avoided. .

A first filter 33 and a second filter 34
When a different catalyst is used, deodorization is performed as follows. A platinum-based catalyst is used for the first filter 33, and a second filter is used.
When a manganese-based catalyst is used for the filter 34, when the formaldehyde gas and the ammonia, methyl mercaptan, acetaldehyde, hydrogen sulfide, etc. are contained as the odorous components in the air, the first filter 33 is generated by the ozone generated by the ozone generator 35. , Formaldehyde gas is deodorized, and ammonia, methyl mercaptan, acetaldehyde, hydrogen sulfide and the like are deodorized in the second filter 34. In the present embodiment, ozone and malodorous components can be mixed and uniformized in the second chamber 32, so that the second filter 34 can efficiently deodorize by catalytic reaction, and only the conventional single catalyst is used. Deodorization can be performed more efficiently than that of products.

In the present embodiment, an electric dust collector is also used as the ozone generator 35. Therefore, the ozone generator 35 has a dust removing capability in addition to an ozone generating capability. When a catalyst is used, dust such as tobacco smoke and oil and grease mist contained in the air flowing in can be prevented from adhering to the surface of the catalyst, and the reduction in the exposed area of the catalyst reduces the catalytic performance of the entire filter. As a result, the effect of extending the life of the first filter 33 and the second filter 34 can be obtained.

Next, in this embodiment, an example in which an ozone detection sensor is provided to control an 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. First
The sensor 41 and the second sensor 42 detect the exposure amount of ozone in the air passing through the first filter 33 and the second filter 34, respectively. The result of detection of the amount of ozone exposure by the sensor 42 is calculated by the first control panel 51, and the second control panel 5 is calculated based on the calculation result.
The second alarm 53 and the operation indicator light 54 output an output based on the amount of ozone flowing out.

FIG. 7 shows an example of a specific calculation. The first control panel 51 stores an arithmetic unit using a microcomputer, and performs the following arithmetic operations cyclically. After the start, the state of the sensor 1 is read, and then the state of the sensor 2 is read. Next, the state of the sensor 2 is determined, and when the performance of the second filter is reduced (when the sensor is turned off when the sensor of FIGS. 5 and 6 is used), an alarm using characters, graphics, or the like Perform an alarm by display or sound, etc.
Turn off the ozone generator and then stop the fan to prevent ozone outflow. The stop of the fan is indicated by the flashing of the operation lamp. Thereafter, the process returns to the step of reading the state of the sensor 1. If the state of the sensor 2 is determined and the performance of the second filter is normal (if the sensor of FIGS. 5 and 6 is used, it is ON), the state of the sensor 1 is further determined and 1 when the performance of the filter 1 is reduced (when the sensors of FIGS. 5 and 6 are used, OF
In the case of (F), an alarm display using characters, figures, or the like, or an alarm using sounds or the like is performed. Thereafter, the process returns to the step of reading the state of the sensor 1. When the capacity of the second filter is normal (ON when the sensor of FIGS. 5 and 6 is used)
), The operation is continued, and the operation lamp is turned on. Thereafter, 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.

FIGS. 5 and 6 show specific examples of the structure of the sensor. The sensor of FIG. 5 supports the support member 61 with the support portion 62,
When the support member 61 is broken, the switch 64 is operated by the spring 63. The support member 61 is a material that deteriorates and breaks when exposed to a predetermined concentration of ozone and a predetermined time,
For example, since it is made of a special rubber or the like, it functions as a sensor for detecting the amount of exposure to ozone. The sensor shown in FIG. 6 includes a case 70 having a hole so that air detected on a film 71 loaded therein can be recirculated, and a case 70 having a hole.
It comprises a film 71 supported and loaded by a film support unit 72 therein, a light emitting unit 73 for detecting a change in the transparency and color of the film 71, a light receiving unit 74, and a calculation unit 75 for calculating the detection result. The film 71 is made of a material whose transparency and color change when exposed to ozone for a predetermined time. In this way, the film 71 functions as a sensor for detecting the ozone exposure amount by changing the contact output from ON to OFF by operating the switch and operating the switch when the exposure of ozone is performed for a predetermined time period.

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 the present embodiment is mounted on a ceiling in a room. This embodiment has a structure in which air in a room is deodorized and sterilized inside the device and then exhausted outside the room. The configuration and function of the main part are the same as those in the first embodiment. In the present embodiment, the air in the room is reduced in coarse dust by the pre-filter 21, is sucked into the ozone chamber of the air cleaning device from the intake port 11, and passes through the ozone generator 35 to add ozone. The odor 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 flowing into the second chamber 32 is supplied to the second filter 3.
Then, the air is exhausted from the exhaust port 12 through the blowing means 22.

In this embodiment, in addition to the effects of the first embodiment,
An increase in indoor gas concentration can be suppressed.

Further, since the exhaust gas has been deodorized, it is possible to reduce 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 illustrating a case where the air cleaning device of the present embodiment is installed on a floor. This embodiment has a structure in which indoor air is deodorized and sterilized inside the apparatus, and then exhausted to a space where the apparatus is installed. The configuration and functions of the main parts are the same as those of the first embodiment. In this embodiment, the air inlet 11 is opened to the side surface at the lower part of the apparatus, and the indoor air sucked from the air inlet 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 odor component contained in the air is supplied to the first chamber 31 connected to the ozone chamber together with the ozone added by the ozone generator 35.
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,
It is exhausted from. FIG. 3 shows a case where the apparatus of this embodiment is installed in a parking lot. In this embodiment, in addition to the effects of the first embodiment, harmful substances contained in exhaust gas can be reduced by using a filter capable of decomposing nitrogen oxides and sulfur oxides in addition to ozone decomposition as the first filter and the second filter. An increase in gas concentration can be suppressed. Further, since the exhaust gas has been deodorized, it is possible to reduce contamination 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 illustrating a case where the air cleaning device of the present embodiment is installed on a floor. This embodiment has a structure in which air in a room 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. .

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 the concentration of harmful gas in exhaust gas can be suppressed. Further, in addition to the effects of the third embodiment, it is possible to suppress an increase in indoor exhaust gas concentration.

[0021]

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

[Brief description of the drawings]

FIG. 1 is a sectional view when an air purifying apparatus according to a first embodiment of the present invention is mounted on a ceiling in a room.

FIG. 2 is a cross-sectional view when an air purifying apparatus according to a second embodiment of the present invention is mounted on a ceiling in a room.

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

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

FIG. 6 is a cross-sectional perspective view showing a 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 purifying apparatus according to the first embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Space 1, 2 ... Space 2, 3 ... Airflow, 10 ... Body, 11
... intake port, 12 ... exhaust port, 21 ... pre-filter, 22 ...
Blowing means, 30 ozone, 31 first chamber, 32
... second chamber, 33 ... first filter, 34 ... second
Filter 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 portion, 63: spring 64: switch, 70: case, 71: film, 72
... Film support part, 73 ... Light emitting part, 74 ... Light receiving part, 75
… Calculator

Continuation of the front page (56) References JP-A-6-262098 (JP, A) JP-A-3-289553 (JP, A) JP-A 8-155015 (JP, A) JP-A-3-143524 (JP) JP-A-7-227421 (JP, A) JP-A-3-2377981 (JP, A) JP-A-63-157223 (JP, U) JP-A-6-19737 (JP, U) (58) Field surveyed (Int.Cl. ⁷ , DB name) A61L 9/015 C01B 13/10

Claims (1)

(57) [Claims] 1. A air cleaning apparatus having an ozone generator in an air flow path extending to the exhaust port from the inlet port, the ozone generated from the ozone generator has an opening communicating with said intake port an ozone chamber to be added to the air sucked through the air inlet, first discharged from the air ozone communicated with the ozone chamber is added first outlet via a first filter
Comprising of a chamber and a second chamber for discharging the second outlet of the air passing through the first filter in communication with the said first outlet via the second filter, the first Ozone in the second filter and the second filter.
A filter having a catalyst for decomposing the same, and the first filter and the second filter have the same
Medium or use a platinum-based catalyst for the first filter.
There, the the second filter using a manganese-based catalyst, the ozone generator is also used as an electric precipitator, and the air discharged from the second exhaust port configured to exhaust from the exhaust port An air purifier characterized by the above.