JP2021081162A - Air shower device - Google Patents

Abstract

To provide an air shower device that prevents water from intruding an air shower device housing even when water is used for cleaning an entering person or when the air shower device is used while water adheres to the entering person.SOLUTION: An air shower device sucks internal air of an air shower room from an air suction port positioned in a housing lower part and blows air, from which dust is removed by a filter, out into the air shower room from a nozzle positioned in a housing upper part to remove dust from an entering person. The air shower device includes a nozzle in an upper part of the air suction port to blow air out so as to block the air suction port from an entering person.SELECTED DRAWING: Figure 1

Description

The present invention relates to an air shower device that is installed at an entrance / exit of a work space for manufacturing semiconductors, precision machinery, etc., processing foods, etc., and removes dust, pollen, etc. adhering to workers with an air jet.

Conventionally, when removing dust, pollen, etc. adhering to a worker's body or the like before entering a work space or the like, the removal is performed by an air shower device. In particular, when an air shower is installed on a wet floor such as a fishery processing plant, or when water adheres to the body after washing hands, the water may be used in a state where it is present in the air shower device room.

Further, Patent Document 1 describes a water air shower device characterized in that a nozzle having a clean air outlet and a water outlet are provided and blown out at the same time to enhance the dust removing effect.

Japanese Unexamined Patent Publication No. 2009-24907

In an air shower device, air sucked by a fan is generally blown out from a nozzle to a person entering the room, and is sucked again by a fan from a suction port at the bottom of the housing to be circulated. When the air shower device described in Patent Document 1 is used in a wet environment, the body, or the like in a state where water is present in the air shower device room, the air blown out from the nozzle is sucked into the housing again by the fan. In addition, there was a problem that water was also sucked in together.

An object of the present invention is to provide an air shower device that prevents water from entering the air shower device housing even if water is used to clean the occupants or the air shower device is used with water attached. To provide.

To give an example of a typical "air shower device" of the present invention for solving the above problems, the air in the air shower room is sucked from the air suction port at the bottom of the housing, and the air from which dust has been removed by a filter is used. An air shower device that blows air into the air shower room from a nozzle at the top of the housing to remove dust from the occupants, and a nozzle that blows air above the air suction port so as to block the occupants and the air suction port. It is characterized by being prepared.

According to the present invention, even if water is used to clean the occupants or the air shower device is used with water adhering to the room, the air shower device that prevents water from entering the air shower device housing is provided. Can be provided.

Issues, configurations and effects other than those described above will be clarified by the following description of the embodiments.

The front sectional view of the air shower apparatus which concerns on embodiment of this invention. The perspective view which shows the left side surface part of the air shower apparatus shown in FIG. An enlarged view of the periphery of the air suction port of the air shower device shown in FIG. The figure which shows the result of the experiment which confirms the effect of this invention. The figure which shows the result of the experiment which confirms the effect of this invention. The figure which shows the result of the experiment which confirms the effect of this invention.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 3.

FIG. 1 is a front sectional view of the air shower device according to the embodiment of the present invention, and FIG. 2 is a perspective view showing a left side surface portion of the air shower device of FIG.

In FIGS. 1 and 2, the air shower device 1 is provided with a nozzle for blowing air into the air shower chamber 2, where 10 is a top nozzle and 11 is a side nozzle. 22 is an air suction port for sucking air in the air shower chamber 2 provided at the lower part of the side surface, 25 is a pre-filter for collecting large dust in the air, and 26 is a main filter for collecting dust in the air and filtering the air. , 27 are fans, and the motor for driving the fan 27 is not shown. Reference numeral 12 denotes a slit type nozzle that blows out air. Although the air suction port 22 and the like are provided only on the left side surface portion in the figure, they may be provided on the left and right side surface portions.

When the occupant 4 enters the air shower chamber 2, the air jet stream 13 is blown out from the top nozzle 10 and the side nozzle 11, and the dust adhering to the body of the occupant 4 is blown off and removed. The removed dust floats in the air shower chamber 2, but is sucked from the air suction port 22 at the lower part of the air shower device 1 by the fan 27 provided on the side surface portion. The sucked air containing dust is filtered through the pre-filter 25 and the main filter 26, blown out from the nozzles 10 and 11 into the air shower chamber 2 again, and exposed to the occupant 4.

FIG. 3 shows an enlarged view of the peripheral portion of the air suction port 22. A slit-type nozzle 12, which is a characteristic configuration of the present invention, is arranged above the air suction port 22. The slit-type nozzle 12 has an elongated slit-shaped opening along the air suction port 22, and the opening is directed toward the bottom surface inclined by an angle θ from the housing surface. The inclination angle θ is preferably 20 ° <θ <40 °, but is not limited thereto. When the inclination angle θ is 20 ° or less, the air blown out from the slit type nozzle 12 is directly sucked from the air suction port 22, and it becomes difficult to suck the air in the air shower room. Further, when the inclination angle θ becomes 40 ° or more, the air blown out from the slit type nozzle 12 comes into contact with the occupant 4.

In order to stabilize the direction of the slit airflow 14, the slit type nozzle 12 preferably has a certain length in the depth direction. Further, the direction of the slit type nozzle 12 may be adjusted so that the direction of the slit airflow 14 can be changed. The slit type nozzle is, for example, a nozzle in which two plates are opposed to each other to form a slit, but the nozzle is not limited to this, and a nozzle in which a plurality of outlets are arranged in a straight line may be used.

As shown in FIG. 1, a part of the air passing through the main filter 26 toward each nozzle is blown out from the slit type nozzle 12 into the air shower chamber 2 as a slit air flow 14. Since the slit type nozzle 12 blows out air so as to block the suction airflow 15 from the occupant 4 to the air suction port 22, the suction airflow 15 does not go straight to the air suction port 22 but downwards or laterally. It is sucked while detouring. The water moving together with the suction airflow 15 is blown to the floor 3 by the slit airflow 14 and gravity, and only air can be taken into the housing from the air suction port 22. This makes it possible to weaken the intrusion of water into the housing.

By separating the position of the air suction port 22 higher than the floor 3, the water collected on the floor 3 is bounced off by the stepping of the occupant 4, or the water is discharged from the hose or the like when cleaning the inside of the air shower room 2. In some cases, the scattering of water to the air suction port 22 is reduced to prevent intrusion. The height of the air suction port 22 is preferably about 500 mm from the floor surface, but this is not the case. It is preferable that the height is such that the water splashed when the occupant walks does not enter through the air suction port 22. Generally, in an environment where water is used in an air shower, dust adheres to a wet floor and cannot be sucked in. Therefore, it is necessary to clean the floor with water. Therefore, even if the position of the air suction port 22 is raised so that the dust on the surface of the floor 3 is not sucked, there is no effect.

As shown in FIG. 3, a pre-filter 25 is provided at the air suction port 22, and a pre-filter cover 21 is provided on the air shower chamber side of the pre-filter 25. By alternately stacking the first suction port plate 23 and the second suction port plate 24 provided with the suction holes 221 on the pre-filter cover 21, the water that has passed through the suction holes 221 of the first suction port plate 23 is sucked into the second suction. By hitting the plate of the mouth plate 24, water can be prevented from entering the housing. In addition, a drainage plate 28 inclined toward the lower part of the pre-filter cover 21 is provided on the lower back side of the pre-filter 25 in the housing. The water that has entered the housing is collected by the drainage plate 28 at the lower part of the pre-filter cover 21 and flows out of the housing to prevent the water from accumulating in the housing.

The following experiment was conducted to confirm the water intrusion prevention effect of the slit type nozzle 12.
A plate imitating a slit-type nozzle 12 is attached to the upper part of the air suction port 22 of the conventional air shower device 1, and a mist is generated by a mist generator near the outlet of the slit-type nozzle 12 to visualize the air flow. Check the flow of. In addition, water is dropped near the outlet of the slit type nozzle 12 to check the behavior of the water droplets.

FIG. 4 shows a case where the slit type nozzle is provided, and FIG. 5 shows a case where the slit type nozzle is not provided. As a result of the experiment, the suction airflow 15 is curved downward by providing the slit type nozzle 12 as shown in FIG. 4, and when the slit type nozzle 12 is not provided as shown in FIG. 5, the suction airflow 15 is the air suction port 22. I confirmed that I was heading straight.

Further, FIG. 6 shows a case where water is dripped. It was also confirmed that the dripping water was repelled in the direction opposite to the air suction port 22 as shown in FIG. 6 by the slit airflow 14 from the slit type nozzle 12. From this result, it can be said that the air shower device 1 of the embodiment has a more effective effect of preventing water from entering the air shower device housing than the conventional air shower device.

According to the present embodiment, the slit type nozzle 12 is inclined at an angle θ (20 ° <θ <40 °) from the housing surface to the upper portion of the air suction port 22 provided at the lower side surface of the air shower chamber 2 and directed toward the bottom surface. Is provided so that air is blown out so as to block the occupant 4 and the air suction port 22, so that even if water is used to clean the occupant or the air shower device is used with water attached. , It is possible to prevent water from entering the air shower device housing.

1 Air shower device 2 Air shower room 3 Floor 4 Visitors 10 Top surface nozzle 11 Side surface nozzle 12 Slit type nozzle 13 Air jet stream 14 Slit stream 15 Suction stream 21 Pre-filter cover 22 Air suction port 221 Suction hole 23 First suction Mouth plate 24 2nd suction port plate 25 Pre-filter 26 Main filter 27 Fan 28 Drainage plate

Claims (9)

It is an air shower device that sucks the air in the air shower room from the air suction port at the bottom of the housing and blows out the air from which the dust has been removed by the filter into the air shower room from the nozzle at the top of the housing to remove the dust of the occupants.
An air shower device characterized in that an air shower device is provided above the air suction port with a nozzle that blows out air so as to block an occupant and the air suction port. In the air shower device according to claim 1,
An air shower device characterized in that the inclination angle θ of the nozzle with respect to the housing surface is 20 ° <θ <40 °. In the air shower device according to claim 1,
An air shower device characterized in that the inclination angle θ of the nozzle with respect to the housing surface can be adjusted. In the air shower device according to claim 1,
The nozzle is an air shower device characterized by being a slit type nozzle. In the air shower device according to claim 1,
An air shower device characterized in that the position of the air suction port is separated from the floor surface to prevent water from entering the air suction port. In the air shower device according to claim 5,
An air shower device characterized in that the position of the air suction port is set to a height at which water splashed when a occupant walks does not enter through the air suction port. In the air shower device according to claim 1,
The pre-filter cover provided on the air suction port is made by stacking two suction port plates with suction holes alternately, and the water that has passed through the suction hole of the suction port plate on the front side of the air shower room is the suction port plate on the back side. An air shower device that is configured to hit the air shower. In the air shower device according to claim 1,
An air shower device characterized in that a drainage plate provided inside the housing prevents invading water from accumulating inside the housing. In the air shower device according to claim 8.
The drainage plate is an air shower device that is inclined toward the lower part of the pre-filter cover, collects water that has entered the housing at the lower part of the pre-filter cover, and flows the water out of the housing.

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