JPH05309227A - Ceiling flush type air cleaner - Google Patents

Abstract

PURPOSE:To prevent the life of an ozonolysis filter from being locally shorten to the filter life by uniformly diffusing ozone. CONSTITUTION:In the 1st mode, an air introducing opening 36 is provided on the sidewall 3a of an inner cylinder 3 having an ozone deodorizer 33 inside. A part of air passing through a circulating pass 6 is introduced into the inner cylinder 3 by the air introducing opening 36. Therefore, the air introduced into the inner cylinder 3 through the air introducing opening 36 diffuses ozone inside the inner cylinder 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceiling-embedded air cleaner for cleaning indoor air, and more specifically, deodorizes air taken from indoor space with ozone,
Further, the present invention relates to a ceiling-embedded air purifier having a function of decomposing ozone contained in treated air by an ozone decomposing filter and then returning the ozone to room air.

[0002]

2. Description of the Related Art Generally, an air purifier of this type is for purifying air by removing odorous components and dust generated indoors. The structure of such an air purifier includes an outer box arranged in a ceiling space partitioned from the indoor space by a ceiling plate, and an outer box housed inside the outer box to communicate the inside of the outer box with the indoor space. It is generally provided with an inner cylinder, and is adapted to recirculate into the indoor space through a recirculation path partitioned by a wall portion of the inner cylinder and an outer box. Deodorizing means for deodorizing the air taken in from the indoor space is arranged in the inner cylinder, and the deodorizing means deodorizes the air passing through the inner cylinder.

As this deodorizing means, an ozone deodorizer for performing deodorizing treatment by generating ozone is widely adopted (see, for example, Japanese Patent Application Laid-Open No. 3-277367).
This is because ozone is the strongest oxidant next to natural fluorine, so ammonia, acetaldehyde,
This is because it is the most suitable substance for decomposing malodorous components such as hydrogen sulfide. However, since ozone is a substance that is harmful to the human body, such as causing respiratory disorders, it is necessary to decompose residual ozone contained in the air after deodorizing treatment when using it in an air cleaner. is there. Therefore, in the above conventional air cleaner, an ozone decomposing filter for decomposing residual ozone in deodorized air is provided, and after the residual ozone is completely decomposed by this ozone decomposing filter, clean air is discharged to the room. I'm trying to return to.

[0004]

However, since the air containing the residual ozone does not always pass through the ozone decomposing filter at a uniform concentration, the life of the ozone decomposing filter is locally shortened, and the remaining portion is left. There was a problem that it was necessary to replace it with a new ozone decomposition filter while it was still usable.

The present invention has been made in view of the above-mentioned problems, and it is possible to prevent the life of the ozone decomposing filter from being locally shortened, thereby extending the life of the ozone decomposing filter. The purpose is to provide an air purifier.

[0006]

In order to solve the above problems, a ceiling-embedded air purifier according to the present invention comprises an outer box arranged in a ceiling space partitioned from an indoor space by a ceiling plate,
An inner cylinder that is housed inside the outer box and connects the inside of the outer box to the indoor space, and an ozone deodorizer that is loaded into the inner cylinder and deodorizes the air taken from the indoor space into the inner cylinder by ozone. And an ozone decomposing filter disposed on the downstream side of the ozone deodorizer and decomposing residual ozone in the deodorized air, and the inner cylinder for returning the air passing through the ozone decomposing filter to the indoor space. In a ceiling-embedded air purifier provided with a return path partitioned by an outer box,
The side wall of the inner cylinder is characterized by being provided with an air inlet for taking in a part of the air passing through the reflux passage into the inner cylinder and diffusing ozone inside the inner cylinder.

A ceiling-embedded air purifier according to another aspect of the present invention has a container through which room air to be deodorized is inserted, and an ozone generator disposed in the container to generate ozone. Together with the ozone deodorizer for deodorizing the air introduced into the container by the ozone of the ozone generator, an ozone decomposing filter disposed downstream of the ozone deodorizer and decomposing residual ozone in the deodorized air. And a panel provided to hold the ozone deodorizer and arranged on the upstream opening side of the container, the panel defining an air inlet between the side wall of the container and A slit for generating a turbulent flow is provided in the container.

In this aspect, the ozone generator is
It is preferable that it is arranged near the side wall of the container. Further, it is preferable that the ozone generator is arranged at a location where the air introduced from the air introduction port passes at a wind speed capable of scattering the salt adhering to the ozone generator.

[0009]

According to the ceiling-embedded air purifier having the above structure, a part of the air passing through the recirculation passage is taken into the inner cylinder through the air introduction port to diffuse ozone into the inner cylinder. Can be made As a result, the air and ozone from the indoor space in the inner cylinder are agitated to accelerate the decomposition of the malodorous components, and the ozone concentration of the air becomes uniform,
This uniform concentration of residual ozone can be decomposed by the entire ozone decomposition filter.

Also in the ceiling-embedded air purifier according to another aspect of the present invention, the panel disposed on the upstream opening side of the container defines an air introduction port with the side wall of the container. Along with having a slit for generating turbulent flow in the container, by introducing the air to be introduced into the container from the air inlet and the slit, the flow of air introduced from the air inlet. Is disturbed by the air from the slit, so that the ozone generated by the ozone generator can be surely diffused.

Particularly, when the ozone generator is arranged near the side wall of the container, the diffusion of ozone is further promoted. Further, when the ozone generator is disposed at a place where the air admitted from the air introduction port passes at a wind speed at which the salt adhering to the ozone generator can be scattered, the ozone generator adheres to the ozone generator. Salt removal can be done automatically during operation.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings. 2 is a cross-sectional view of a ceiling-embedded air cleaner according to an embodiment of the present invention, and FIG. 1 is a cross-sectional view taken along line I-I of FIG. First, referring to FIG. 1, the above-mentioned ceiling-embedded air cleaner includes a metal outer casing 1 arranged in a ceiling space C2 partitioned from an indoor space C1 by a ceiling plate C. The box 1 is suspended above the ceiling by four stays S (see FIG. 2).

The lower end opening of the outer case 1 is covered with a decorative panel 2. The decorative panel 2 includes a suction port 21 formed substantially in the center side and a blowout port 22 formed around the suction port 21, and the interior of the outer box 1 via the suction port 21 and the blowout port 22. While communicating with the indoor space C1,
This is for closing the gap between the outer case 1 and the ceiling plate C.

Inside the outer case 1, an inner cylinder 3 whose lower end is opened at the suction port 21 of the decorative panel 2 is accommodated. The inner cylinder 3 is a cylinder body having a substantially rectangular cross section formed of the same material as the outer casing 1, and a pre-filter 31 facing the suction port 21 is attached to the lower end side opening thereof. An electrostatic filter 32 is mounted on the downstream side of the pre-filter 31. The electrostatic filter 32 is for performing dust removal processing by electrostatically adsorbing the dust not removed by the pre-filter 31.

On the downstream side of the electrostatic filter 32, a plurality of ozone deodorizers 33 for deodorizing by generating ozone are provided. The ozone deodorizer 33 includes an ozone generator 33a that generates ozone by creeping discharge, and decomposes the malodorous component contained in the air introduced into the inner cylinder 3 through the electrostatic filter 32 by this ozone. However, it is for deodorizing treatment.

On the downstream side of the ozone deodorizer 33, an ozone decomposition filter 34 is attached to the inner wall of the inner cylinder 3 via a frame 35. The ozone decomposing filter 34 is configured by applying an ozone decomposing catalyst to a honeycomb-shaped molded body, and is for decomposing residual ozone contained in the air after the deodorizing process. The fan 4 faces the downstream side of the ozone decomposition filter 34. This fan 4 is the inner cylinder 3
Part of the air enters into the upper opening of the outer casing 1 and is rotatably driven by the motor 5 fixed to the ceiling plate 11 of the outer casing 1 to suck air from the indoor space C1 into the inner cylinder 3 and The air is returned from the air outlet 22 of the decorative panel 2 to the indoor space C2 via the return path 6 formed between the outer case 1 and the inner cylinder 3.

In the above structure, as shown in FIG. 2, an opening is provided between the ozone deodorizer 33 and the ozone decomposing filter 34 near each corner of the side wall 3a forming the four sides of the inner cylinder 3. An air inlet 36 is formed. The air introduction port 36 is formed by cutting and raising the side wall 3a at the time of molding the inner cylinder 3, and includes a hood portion 36a that faces the direction of air flow through the return passage 6. This allows
Part of the air passing through the return passage 6 can be taken into the inner cylinder 3 to diffuse ozone in the inner cylinder 3.

Further, in this embodiment, a bypass pipe 7 is provided which directly connects the upstream side of the electrostatic filter 32 and the downstream side of the ozone deodorizing filter 34. Bypassing the bypass pipe 7 into the room by omitting a part of the dust removal process and the ozone deodorization process, the longevity of each of the filters 32 and 34 is ensured in a state in which a desired supply / exhaust amount is secured. It is a thing.

According to the above construction, by rotating the fan 4 by the motor 5, the air in the indoor space C1 is sucked from the suction port 21 of the decorative panel 2, and the pre-filter 31 and the electrostatic filter 32 are arranged in this order. It is introduced into the inner cylinder 3 through it. In this process, the air in the indoor space C1
Dust removal processing is performed by the pre-filter 31 and the electrostatic filter 32.

Next, the dust-removed air is mixed in the inner cylinder 3 with ozone generated by the ozone generator 33a of the ozone deodorizer 33. As a result, the malodorous components contained in the air introduced into the inner cylinder 3 are decomposed by the ozone and deodorized. The air after deodorization is
After passing through the ozone decomposition filter 34, it is returned to the indoor space C2 from the outlet 22 of the decorative panel 2 via the return path 6. In this process, the residual ozone contained in the air after the deodorizing process is removed by the ozone decomposing filter 34, and is returned to the indoor space C2 as odorless clean air.

Here, in this embodiment, the air inlet 3
Since 6 is provided on the side wall 3a of the inner cylinder 3, a part of the air passing through the reflux passage 6 is taken into the inner cylinder 3 from the air introduction port 36, and ozone in the inner cylinder 3 is diffused. Three
The air and ozone from the indoor space C1 in the interior are agitated to accelerate the decomposition processing of the malodorous components, and the ozone concentration of the air becomes uniform, and the residual ozone of this uniform concentration is
It can be decomposed by the entire ozone decomposition filter 34. As a result, according to the present embodiment, it is possible to prevent a local shortening of the service life of the ozone decomposing filter 34, and thereby to prolong the service life of the ozone decomposing filter 34 as a whole.

Further, in this embodiment, the air inlet 3
6, a hood 36 facing the direction of air flow in the return path 6
Since a is provided, it becomes easier to take in air, and ozone in the inner cylinder 3 can be effectively diffused. Further, in this embodiment, since the bypass pipe 7 that directly connects the upstream side of the electrostatic filter 32 and the downstream side of the ozone deodorizing filter 34 is provided, the bypass pipe 7 removes dust from a part of the air and ozone. By omitting the deodorizing process and returning the air to the room, it is possible to extend the service life of each of the filters 32 and 34 while ensuring a desired amount of supply and exhaust air.

Next, the embodiment shown in FIG. 3 and subsequent figures will be described.
FIG. 3 is a perspective view of a ceiling-embedded air cleaner according to another embodiment of the present invention, and FIG. 4 is a vertical cross-sectional view of the ceiling-embedded air cleaner. With reference to both figures, this ceiling-embedded air purifier includes an inner cylinder 3 as a container into which the room air to be deodorized is inserted. The inner cylinder 3 itself is
It is the same as the inner cylinder 3 in the embodiment of FIG. 1, and the pre-filter 31 faces the opening on the lower end side. In this embodiment, as shown in FIG. 3, the pre-filter 31 is detachably attached to the filter frame 131, and the filter frame 131 is rotatably supported on the decorative panel 2 so as to be openable and closable.

A panel 132 is arranged on the downstream side of the prefilter 31. The panel 132 is disposed in a posture facing the substantially central opening of the inner cylinder 3 via a holding metal fitting 132a (only shown in FIG. 3), whereby the panel 132 and the side wall 3a of the inner cylinder 3 are arranged. The air inlet IN is divided between them. Further, the panel 132 is provided with slits ST extending long along the respective pieces.

The panel 132 holds a plurality of ozone deodorizers 133. This ozone deodorizer 133 is
The high voltage generator is integrated with an ozone generator 133a that generates ozone by creeping discharge on its upper end surface. In this embodiment, the air inlet IN
It is arranged between the air inlet IN and the slit ST so that the air introduced from (1) can pass through the salt adhering to the ozone generator 133a at a wind speed capable of being scattered. Then, the ozone deodorizer 133 is connected to the air inlet IN
And the slit ST, the ozone generator 133a of the ozone deodorizer 133 is disposed between the inner cylinder 3 and
It is arranged near the side wall 3a (see FIG. 5). In this embodiment, as shown in FIG. 4, the sound absorbing material 8 is attached to the inner surface of the inner cylinder side wall 3a that covers the ozone deodorizer 133. The sound absorbing material 8 is made of, for example, urethane or the like, and preferably has a large number of undulations by forming the surface in a corrugated shape.

The remaining part is the same as that of the embodiment of FIG. 1 except that the electrostatic filter is omitted, and therefore, the same reference numerals are given and the description thereof is omitted. In the present embodiment, the air to be introduced into the inner cylinder 3 is introduced from the air introduction port IN and the slit ST, so that the air introduction port IN is formed.
Since the flow of the air introduced from the air is disturbed by the air from the slit ST, the ozone generated by the ozone generator 133a of the ozone deodorizer 133 can be surely diffused. The life of the ozone decomposition filter 34 can be prevented from being shortened, and the life of the entire ozone decomposition filter 34 can be prolonged.

In particular, in this embodiment, since the ozone generator 133a is disposed near the side wall of the inner cylinder 3, the diffusion of the ozone is further promoted, so that the residual ozone is in a more uniform state. Thus, the ozone decomposing filter 34 is allowed to pass therethrough, and the above effect can be obtained. Further, in the present embodiment, the ozone generator 133a uses the air introduced through the air inlet IN to generate the ozone generator 1a.
Since the salt adhering to 33a is disposed at a place where it can pass through at a wind speed that can be scattered, the salt adhering to the ozone generator 133a can be automatically removed during operation. Is prevented, and higher ozone deodorizing performance can be maintained for a long period of time.

Further, in this embodiment, since the sound absorbing material 8 is attached to the inner surface of the inner cylinder side wall 3a, the high frequency caused by the creeping discharge can be attenuated and the abnormal noise can be prevented. Also,
In the present embodiment, since the undulations are provided by forming the surface of the sound absorbing material 8 in a corrugated shape, it is possible to contribute to the homogenization of ozone. [Test Example] (1) Measured value of this embodiment As shown in FIG. 5, ozone decomposition filters S1 to S3 were used.
It is divided into two sectors, and for each sector S1 to S32,
As a result of measuring the ozone concentrations passing through them, the measured values shown in Table 1 were obtained. In addition, in FIG. 5, the two-dot chain line shows the arrangement position of the ozone generator 133a.

[0029]

[Table 1]

As is clear from Table 1, the average ozone concentration is 0.4 ppm, while the maximum ozone concentration is
It was 0.7 ppm, and it was confirmed that ozone uniformly passed through the ozone decomposition filter S1. (2) Measured Value of Conventional Example As shown in FIG. 6, in the conventional configuration, the ozone decomposition filter was divided into sectors S1 to S32, and the ozone concentration passing through each of the sectors S1 to S32 was measured. As a result, the measured values shown in Table 2 were obtained. In addition, in FIG. 6, the alternate long and two short dashes line shows the arrangement position of the ozone generator 133a.

[0031]

[Table 2]

As is clear from Table 2, the average ozone concentration is 0.4 ppm, whereas the maximum ozone concentration is
It was 3.6 ppm, and it was confirmed that ozone was nonuniformly passing through the ozone decomposition filter S1. Needless to say, the above-described embodiments are merely illustrative of preferred specific examples of the present invention, and various design changes can be made without departing from the scope of the present invention.

[0033]

As described above, according to the present invention, by diffusing ozone into the inner cylinder, the air and ozone from the indoor space in the inner cylinder are agitated and the decomposition of the malodorous component is promoted. At the same time, the ozone concentration of the air passing through the ozone decomposing filter is made uniform, and the residual ozone of this uniform concentration can be decomposed by the entire ozone decomposing filter, preventing the local shortening of the life of the ozone decomposing filter, As a result, there is a remarkable effect that the life of the entire ozone decomposition filter can be extended.

Also in the ceiling-embedded air purifier according to another aspect of the present invention, the air to be introduced into the container is introduced from the air introduction port by introducing it from the air introduction port and the slit. Since the flow of air is disturbed by the air from the slit, the ozone generated by the ozone generator can be reliably diffused. As a result, even in this mode, it is possible to prevent a local shortening of the life of the ozone decomposing filter. This has the remarkable effect that the life of the entire ozone decomposition filter can be extended.

Particularly, when the ozone generator is arranged near the side wall of the container, the diffusion of the ozone is further promoted, so that the residual ozone passes through the ozone decomposition filter in a more uniform state. Thus, the above effect can be obtained. Further, when the ozone generator is disposed at a place where the air admitted from the air introduction port passes at a wind speed at which the salt adhering to the ozone generator can be scattered, the ozone generator adheres to the ozone generator. Since the salt can be removed automatically during operation, there is an advantage that the ozone generation rate can be prevented from decreasing due to the deliquescent of the salt, and a higher ozone deodorizing performance can be maintained for a long period of time.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an air cleaner according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the air cleaner.

FIG. 3 is a perspective view of a ceiling-embedded air cleaner according to another embodiment of the present invention.

FIG. 4 is a vertical sectional view of the ceiling-embedded air cleaner.

FIG. 5 is a schematic diagram showing measurement points in a test example of the example according to FIG.

FIG. 6 is a schematic diagram showing measurement points in a test example of the related art.

[Explanation of symbols]

 1 Outer Box 3 Inner Cylinder (Container) 6 Reflux Channel 33 Ozone Deodorizer 34 Ozone Decomposition Filter 36 Air Inlet 132 Panel 133 Ozone Deodorizer 133a Ozone Generator ST Slit

Claims (4)

[Claims] 1. An outer box (1) arranged in a ceiling space (C2) partitioned from an indoor space (C1) by a ceiling plate (C), and housed inside the outer box (1), Inner cylinder (3) that connects the inside of the outer box (1) and the interior space (C1), and the inner cylinder (3) that is loaded from the interior space (C1) to the inner cylinder (3).
An ozone deodorizer (33) that deodorizes the air taken in by ozone, and an ozone decomposing filter (34) that is installed downstream of the ozone deodorizer (33) and decomposes residual ozone in the deodorized air. The air that has passed through the ozone decomposition filter (34) should be
In order to recirculate to (C1), in the ceiling-embedded air purifier equipped with the inner cylinder (3) and the return path (6) partitioned by the outer box (1), the inner cylinder (3) The side wall (3a) is provided with an air inlet (36) for taking in a part of the air passing through the reflux passage (6) into the inner cylinder (3) and diffusing ozone inside the inner cylinder (3). A ceiling-embedded air purifier featuring. 2. A container (3) in which room air to be deodorized is inserted, and an ozone generator which is disposed in the container (3) and generates ozone.
(133a), and the ozone deodorizer (133) for deodorizing the air introduced into the container (3) by the ozone of the ozone generator (133a) and the ozone deodorizer (133) Installed ozone decomposing filter that decomposes residual ozone in deodorized air (34)
And a panel (132) provided to hold the ozone deodorizer (133) and arranged on the upstream opening side of the container (3), the panel (132) being the container (3). The air inlet (IN) is partitioned from the side wall (3a) of the
A ceiling-embedded air purifier characterized by having a slit (ST) that generates turbulent flow inside. 3. The ozone generator (133a) comprises the container (3).
The ceiling-embedded air purifier according to claim 2, which is disposed near the side wall (3a) of the. 4. The ozone generator (133a) comprises an air inlet (I
The ceiling-embedded air purifier according to claim 2, wherein the air introduced from (N) is disposed at a place where the salt adhering to the ozone generator (133a) can pass through at a wind speed capable of being scattered.