JPH0427409A - Air cleaner - Google Patents

Abstract

PURPOSE:To prevent the stagnation of dust in a clean room and to operate the cleaner with low noise by providing a straightening and deflecting plate having a long passage for the air delivered from a fan and a high air flow straightening effect and further furnishing a silencer chamber in a cleaning chamber. CONSTITUTION:Air is sucked by a fan 2 in a fan room 11 in its axial direction and strikes the fan 2. The air current is delivered from an outlet 21 of the fan 2 along a blind patch 4 and strikes the silencer chamber 14. The air current delivered to the silencer chamber 14 is diffused by the shape of the chamber 14 with its width gradually changed and uniformly introduced into a communicating port 13. The noise made by the fan 2 is reduced by the diffusion effect of the chamber 14. The air current from the chamber 14 is introduced into the four equally spaced passages formed by the straightening and deflecting plates 51, 52 and 53. The air current introduced into the passages is moved along the plates 51, 52 and 53 and straightened. The straightened air current is introduced into a filter room 12 by the lower ends of the plates 51, 52 and 53 bent in the air current direction.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to an air purifying device that purifies air, and is particularly lightweight, thin, low noise, has excellent dust collection efficiency, and The present invention relates to an air cleaning device in which air is discharged as a laminar flow.

(Prior Art) In fields such as the semiconductor industry, electronic industry, precision machinery industry, biotechnology, and pharmaceutical industry, an ultra-high degree of cleanliness is required. Clean spaces include clean rooms that clean the entire working environment, clean benches and clean booths that locally clean the working environment. In order to create such a clean space, an air cleaning device that combines a fan and an air filter is used.

In conventional air purification devices, the dynamic pressure of the airflow sent out by the fan is uneven, so when the airflow passes through the air filter under these conditions, the air exhausted from the air filter becomes turbulent. . If the turbulent flow is blown into a clean room, for example, dust will accumulate, making it impossible to obtain a high degree of cleanliness. In addition, there is a problem that soundproofing and insulation are not taken into account, resulting in high noise levels.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional problems, and its purpose is to reliably prevent the occurrence of turbulence in the air discharged from the air filter and to improve the wind speed distribution. An object of the present invention is to provide an air cleaning device that can form a uniform laminar flow and maintain a high level of cleanliness in a clean room, for example. Another object of the present invention is to provide an air cleaning device that is lightweight, thin, and low in noise.

(Means for Solving the Problems) The air purifying device of the present invention includes a casing in which a purification chamber is provided, a fan chamber on an airflow inflow side, a silencing chamber communicating with the fan chamber, and an airflow a blind plate that is divided into a filter chamber on the discharge side and has a communication port that communicates the silencing chamber and the filter chamber; and a fan that is disposed within the fan chamber and sends out airflow along the blind plate. , an air filter disposed in the filter chamber, and a plurality of mutually parallel air filters disposed in the communication port for rectifying the airflow sent into the silencing chamber from the fan and guiding it to the air filter. A rectifying deflection plate that forms a flow path is provided, thereby achieving the above object.

Furthermore, the air filter may further include a perforated plate that covers the entire surface of the air flow inflow side of the air filter.

(Example) Examples of the present invention will be described below.

FIGS. 1 and 2 show a perspective view and a plan view of an embodiment of the air cleaning device of the present invention. FIG. 3 shows a cross-sectional view taken along line mm in FIG. 2. In addition, in Figures 1 and 2,
The air purifier is shown with the top lid removed. As shown in FIGS. 1 and 2, the air purifying device of the present invention includes a casing 1 provided with a purification chamber 10 having a fan chamber 11, a silencing chamber 14, and a filter chamber 12, and a fan chamber II. It has a fan 2 and an air filter 3 provided in a filter chamber 12. Purification room 10
While air is flowing through it, it is purified.

The purification chamber 10 is connected to a fan chamber 11 on the airflow inflow side by a blind plate 4.
It is divided into a silencing chamber 14 and a filter chamber 12 on the airflow discharge side. Two of the four circumferential sides of the blind plate 4 are
It is in contact with two circumferential side surfaces of the purification chamber 10, but the other two side surfaces are spaced apart from the side surfaces of the purification chamber 10, and the fan chamber 11 and the silencing chamber 1
4 and the filter chamber 12 are formed.

The communication port 13 is provided across the entire width of the casing 1 in the width direction. On the other hand, the outlet 21 of the fan 2 has a width that is approximately half the width of the casing 1. Communication port 13
A silencing chamber 14 whose width gradually changes is formed by the side wall of the casing 1 and the airflow guide plate 6 between the casing 1 and the outlet 21 . The airflow guide plate 6 is in airtight contact with the fan 2 and the casing 1. The airflow sent to the silencing chamber 14 along the blind plate 4 by the fan 2 disposed in the fan chamber 11 is distributed evenly to the communication port 13 due to the diffusion effect of the shape of the silencing chamber 14 whose width gradually changes. be introduced. Moreover, the noise generated from the fan 2 is also reduced by the diffusion effect of the silencing chamber 14.

On the opposite side of the outlet 21 of the fan 2, a sound insulating panel 16 is provided over the entire width of the purification chamber 10. A metal plate is used for the sound insulating panel 1G, but a controlled iron plate, an iron plate with a sound absorbing material such as rubber, etc. can also be used.

In the filter chamber 12 of the purification chamber IO, an air filter 3 is provided at a predetermined distance from the blind plate 4. The air filter 3 is attached to the four circumferential surfaces of the casing 1 in an airtight manner. A punching plate 15, which is a perforated plate, is provided on the filter chamber 12 side of the air filter 3 at a predetermined distance from the air filter 3. The punching plate 15 functions to disperse and rectify the airflow that has passed through the communication port 13 and to supply an even airflow to the entire surface of the air filter 3. As the perforated plate, a mesh material such as metal or plastic may also be used instead of the punching blade 15.

Three rectifying deflection plates 51, S
2 and 53 are arranged in parallel. Each rectifying deflection plate 5
1.52 and 53 are fitted over the entire length of the communication port 13 (width direction of the casing l). In addition, each of the rectifying deflection plates 51, 52, and 53 is connected to the communication port 13.
are arranged at equal intervals so as to divide it into four equal parts. The length of each of the rectifying deflection plates 51, 52, and 53 in the vertical direction increases in order from the one closest to the fan 2 to the one farthest from the fan 2. That is, the rectifying deflection plate 51 located closest to the fan 2
is the shortest (and the rectifying deflection plate 53 located farthest from the fan 2 is the longest).

The upper ends of each of the rectifying deflection plates 5L 52 and 53 are bent in the airflow inflow direction of the fan 2. Further, the upper end portion of each rectifying deflection plate 51, 52, and 53 is arranged at a position that equally divides the length of the vertical direction of the silencing chamber 14 into four. The lower end portion is bent in the airflow outflow direction. With such a configuration of the rectifying deflection plates 51, 52, and 53, four mutually parallel flow paths are formed in the communication port 13. The four flow paths rectify the airflow sent into the silencing chamber 14 from the fan 2 and evenly supply it onto the punching plate 15.

Although three rectifying deflection plates are provided in this embodiment, the present invention is not limited to this. Although it depends on the amount of air blown by the fan 2, it is not preferable if the number of rectifying deflection plates is less than three because the rectifying effect becomes small. Providing four or more rectifying deflection plates increases the weight of the air purifier, and
This is not preferable because it increases the cost due to the increase in the process of installing the rectifying deflection plate.

In this embodiment, in order to enhance the sound absorption effect, the blind plate 4 has two iron plates, and glass wool is filled between these iron plates. The thickness of the blind plate 4 is approximately 25 m. The glass wool filled is 48 kg/I''.

In addition, a casing 1 surrounding the silencing chamber 14, an airflow guide plate 6,
And the upper lid 17 also has 4
8 kg/+*" glass wool is applied to a thickness of about 25 av.

The air cleaning device having the above configuration will be explained along the flow of air. The fan 2 in the fan chamber II sucks air into the fan 2 along its axial direction.

The fan 2 sends out airflow from its outlet 21 along the blind plate 4 into the silencing chamber 14. The airflow sent to the silencing chamber 14 is uniformly introduced into the communication port 13 due to the diffusion effect of the shape of the silencing chamber 14 whose width gradually changes.

Moreover, the noise generated from the fan 2 is also reduced by the diffusion effect of the silencing chamber 14.

The airflow flowing out from the silencing chamber 14 is directed to the rectifying deflection plates 51 and 52.
and 53 at equal intervals. The airflow introduced into these channels is rectified while moving along each of the rectifying deflection plates 51, 52 and 53. The rectified airflow is introduced into the filter chamber 12 by the lower ends of the rectification deflection plates 51, 52, and 53 bent in the airflow outflow direction.

The airflow introduced into the filter chamber 12 is dispersed by the punching plate 15, made uniform, and supplied to the entire surface of the air filter 3. ) The airflow that has passed through the cunching plate 15 is purified while passing through the air filter 3 and is discharged to the outside of the purification chamber 10. in this way,
The airflow rectified by the rectification deflection plates 5152 and 53 is further dispersed and made uniform by the punching plate 15, so that the airflow discharged from the filter chamber 12 becomes a laminar flow.

The rectification effect can be expressed by the formula shown below.

Standard deviation of wind speed Rectification effect = Average wind speed (m/sec) In the conventional air purifier, the value of the rectification effect was 0.205. On the other hand, in the air cleaning device of this example, the value of the rectification effect was 0.128. As described above, the air cleaning device of this embodiment has a high rectifying effect.

Since the air purifying device of this embodiment is provided with a silencing chamber 14 whose width gradually changes between the fan 2 and the communication port 13, a high noise prevention effect can be obtained. Further, in this embodiment, glass wool is attached to the casing 1, the airflow guide plate 6, and the lid 17 surrounding the sound deadening chamber 14. Further, the blind plate 4 has two iron plates, and glass wool is filled between these iron plates. Further, in this embodiment, a sound insulating panel 16 is provided on the side opposite to the outlet 210 of the fan 2. Such a configuration further enhances the soundproofing effect. With conventional air purifiers, the noise level 1 meter below the operating air purifier is, for example, 55 dB.
Met. On the other hand, in the air purifier of this embodiment, 5
It was 0dB. Thus, it can be seen that the air purifying device of this example has a high soundproofing effect.

(Effects of the Invention) As described above, in the air purifying device of the present invention, the flow path of the airflow sent out from the fan is long, and the rectification deflection plate with a high airflow rectification effect is provided, so the airflow is efficient (rectification is,
It is homogenized. Therefore, the airflow is gently introduced into the air filter with a uniform wind velocity distribution, and is discharged from the air filter as a laminar flow. Further, by providing the punching plate, the discharged airflow is further rectified and made uniform. In this way, by using the air cleaning device of the present invention, the discharged airflow becomes a laminar flow, which prevents dust from accumulating in the clean room.
High cleanliness is guaranteed.

Further, since a silencing chamber is provided in the purification chamber of the air purifying device of the present invention, low-noise operation is possible.

4. Nona Raihi Figure 1 is a partially cutaway perspective view showing an example of the air purifying device of the present invention, Figure 2 is a plan view of the air cleaning device shown in Figure 1, and Figure 3 is the part shown in Figure 2. It is a sectional view taken along the line -■.

DESCRIPTION OF SYMBOLS 1...Casing, 2...Fan, 3...Air filter 4...Blind plate, 6...Airflow guide plate, 11
...Fan room, 12...Filter room, 13...
Communication port, 15... Punching plate, 16...
・Sound insulation panel, 51. 52. 53... Rectifying deflection plate.

that's all

Claims (1)

[Claims] 1. A casing with a purification chamber provided therein, and the purification chamber divided into a fan chamber on the airflow inflow side, a silencing chamber communicating with the fan chamber, and a filter chamber on the airflow discharge side. Also, a blind plate having a communication port that communicates the silencing chamber and the filter chamber, a fan disposed within the fan chamber to send airflow along the blind plate, and a fan disposed within the filter chamber. an air filter; and a rectifying deflection plate arranged at the communication port and forming a plurality of mutually parallel flow paths for rectifying the airflow sent into the silencing chamber from the fan and guiding it to the air filter. An air purifying device comprising: 2. The air cleaning device according to claim 1, further comprising a perforated plate that covers the entire surface of the air flow inflow side of the air filter.