JPH0732439U - Air shower device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an air shower device having an excellent dust removing effect. [Structure] A spiral member is provided in the air jet nozzle.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an air shower device installed at the entrance to a space maintained in a clean environment such as a clean room.

[0002]

[Prior art]

 At the entrance to the working room, which is always kept in a clean environment such as a clean room or bio-clean room, an air shower device is installed to remove dust and germs adhering to the clothes of the occupants.

Conventionally, as an air shower device of this type, for example, a shower chamber and an air purifying chamber are provided in a main body case, and the air provided in the air purifying chamber sucks air in the shower chamber into the air purifying chamber. It is known that the air is sprayed into the shower room after being cleaned with a filter, and the relationship between the jetting time (sec) of the air jet and the dust removal efficiency (%) in this air shower device is shown in FIG. Shown in.

As shown in FIG. 6, in the conventional air shower apparatus, if the air shower is continuously taken, the air shower injection method is uniform and the dust removal efficiency is saturated in about 20 seconds. However, in order to enhance the effect, it was necessary for the person entering the room to rotate or tap the clothing surface by hand while taking an air shower.

[0005]

[Problems to be solved by the device]

 SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the conventional art, and an object of the present invention is to provide an air shower device having an excellent dust removing effect.

[0006]

[Means for Solving the Problems]

 A spiral member was provided in the air jet nozzle.

[0007]

[Action]

 When the appropriately pressurized clean air passes through the spiral member in the air jet nozzle, it is swirled and is jetted as a swirling airflow to blow away dust and the like adhering to the clothing surface. At this time, the swirling of the air jet causes straightness (propulsive force) to the air jet immediately after the jetting, which prevents immediate diffusion of the air jet to enhance the impact force of the jetting and at the same time the clothing surface. After reaching, the vibration and agitation action are exerted on a large area of the clothing surface, whereby the dust removal efficiency is improved.

[0008]

【Example】

 Examples will be described with reference to the drawings.

An air shower device according to an embodiment of the present invention is shown in FIG. In FIG. 1, the air shower device 1 is provided with a gate-shaped partition wall 3 inside a box-shaped main body case 2 so as to also serve as a passage that penetrates the main body case 2 from the front side to the rear side in the central portion. It is divided into a shower chamber 4 and air purification chambers 5 located on both sides of the shower chamber 4, and the shower chambers 4 and the air purification chambers 5 are a plurality of air injection ports provided in the middle of the partition wall 3. 6 and an air intake 7 provided below the partition 3 to communicate with each other.

An air chamber 8 is provided in the air purifying chamber 5 so as to cover the air injection port 6 from behind, and an air outlet 10 of a blower 9 is connected to a lower portion of the air chamber 8, and an air chamber 8 is provided. Inside the chamber 8, a filter 11 for cleaning the air blown by the blower 9 is provided, and a pre-filter 12 is provided below the blower 9.

The air jet nozzle 13 is supported by the holder 14 at the air jet port 6, and the air jet nozzle 13 is shown in FIG. 2 and described below.

The air jet nozzle 13 has an air introduction port 13a formed by cutting off a part of a sphere, and a cylindrical air outlet 13b is provided at a position facing the air introduction port 13a. Further, the holder 14 is formed in a truncated cone shape and fixed to the partition wall 3 at the outer peripheral portion, and a receiving portion 14a having the same inner spherical surface as the air jet nozzle 13 is formed in the recessed central portion. There is. Further, the receiving portion 14 and the annular supporting member 14b of the same shape provided on the receiving portion 14 support the spherical surface of the air jet nozzle 13 so that the blowing direction of the air jet nozzle 13 can be freely changed.

Inside the air jet nozzle 3, a spiral member 15 having the same axis as the air jet nozzle 3 is provided. In the illustrated example, the spiral member 15 has a propeller fan (screw) shape and is rotatably supported by a support member 16. Further, instead of providing the support member 16, the spiral member may be directly fixed to the inner peripheral surface of the air jet nozzle 3.

Next, the operation will be described based on examples.

In FIG. 1, when a person in the room opens the door 17 on the entrance side and enters the shower room 4 and closes the door 17, a control switch (not shown) attached to the door 17 is turned on and the blower 9 is operated. Start. Then, the air in the shower room 4 is sucked into the air blower 9 from the air intake 7 through the pre-filter 12, is further sent into the air chamber 10 from the air outlet 12, and is filtered by the filter 13. Then, as the pressure inside the air chamber 10 increases, the clean air is jetted into the shower chamber 4 from the air jet nozzle 13 of the air jet port 6.

At this time, as shown in FIG. 2, the clean air on the side of the air chamber 8 is introduced from the air introduction port 13a of the air jet nozzle 13, and when passing through the spiral member 15 in the air jet nozzle 13, a spiral It is guided by the member 15 to be swirled, and is injected into the shower chamber 4 as a swirling air flow (vortex flow).

Although the swirling airflow is slightly decelerated due to the contact resistance with the spiral member 15, immediately after it leaves the air injection port 13b of the air jet nozzle 13, it is given a propulsive force by the swirling and goes straight ahead. Since it has a strong property, the swirling airflow is not diffused but rather increases the impact force of the jet and reaches the clothing surface. Then, the swirling airflow blown causes a large area of the clothing surface to vibrate and stir by swirling, and the vibration and stirring effect not only blows off the dust and the like adhering to the clothing surface of the person entering the room, It gives a fluctuating action to the particles, weakens the adhesion of the dust particles to the clothes, and greatly enhances the dust removing effect. This is effective in avoiding the situation where dust particles on the surface of the clothes are pushed into the clothes by continuous air injection, and the dust removal effect is saturated compared to the injection time, causing a ceiling. Becomes

Specific experimental data for removing dust will be shown below.

Table 1 shows the removal efficiency (%) by dust particle size of the air jet nozzle 13 provided with the spiral member 15 in the air shower device 1 of the embodiment of the present invention and the conventional air jet nozzle under the same conditions. It is a thing.

[0020]

[Table 1]

It can be seen from Table 1 that the removal efficiency of the air shower device 1 of the embodiment of the present invention is higher than that of the conventional air shower device for any particle size.

Further, FIG. 3 shows the relationship between the air jet speed (m / sec) and the dust removal efficiency (%) in the same device. From FIG. 3, in addition to the above results, it can be seen that the removal efficiency of the air shower device 1 of the embodiment of the present invention is remarkably improved, especially when the air jet speed is low.

[0023]

[Effect of device]

 In the air shower device of the present invention, as described above, the spiral member is provided in the air jet nozzle, so that the air jet can be jetted as a swirling air flow, the impact force of the air jet is enhanced, and the clothing surface is wide. It is possible to obtain high dust removal efficiency by exerting vibration and agitation on the area.

[Brief description of drawings]

FIG. 1 is a partially longitudinal front view of an air shower device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of an essential part showing an air jet nozzle in an air shower device according to an embodiment of the present invention.

FIG. 3 is a graph showing the relationship between air jet and dust removal efficiency.

FIG. 4 is a graph showing the relationship between air jet ejection time and dust removal efficiency in a conventional example.

[Explanation of symbols]

 1 Air Shower Device 13 Air Jet Nozzle 15 Spiral Member

Claims (1)

[Scope of utility model registration request] 1. An air shower device comprising a spiral member provided in an air jet nozzle.