JP3308098B2 - Air shower equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a function for removing dust adhering to the surface of a human body or an object passing through a passage provided in an apparatus main body, which is installed in an entrance passage leading to a clean room. The present invention relates to an air shower device having a function of keeping the air in a passage clean during a steady state in which an object or the like does not pass.

[0002]

2. Description of the Related Art Conventionally, this type of air shower apparatus has been disclosed in Japanese Utility Model Publication No. 58-1143.
As in No.3, a blower for clean air blower and a blower for high-speed jet stream blower are separately installed, which requires separate partition walls for passages in the wind tunnel. In addition to increasing the number of devices to be assembled, the size of the entire apparatus is increased to increase equipment costs, and when the size of the apparatus is increased, various restrictions are imposed on transport to the site and construction. For this reason, as disclosed in Japanese Patent Application Laid-Open No. Sho 64-63087, an air blower capable of switching between high and low speeds is provided, and an upper wind tunnel and a side portion defined on the ceiling including a circulating air outlet are provided for the purpose of downsizing the apparatus. An air damper that opens and closes at the time of high-speed operation of the blower and opens and closes at the time of low-speed operation at the communication point between the wind tunnel and the communication point between the wind tunnels has been proposed. However, there is a problem that dust on the head cannot be efficiently removed because the airflow does not blow out from the ceiling when a human body or an object passes. In addition, the jet stream needs to blow out dust attached to people at a high speed, so the outlet is narrowed and used as a nozzle. The circulating stream catches dust in the room and the indoor cleanliness needs to be improved. A low-speed airflow from below to the room. For this reason, there has been a problem that it is difficult to provide a circulating airflow outlet and a jet airflow outlet simultaneously on the same ceiling surface.

[0003]

SUMMARY OF THE INVENTION An air shower device according to the present invention is provided in an apparatus main body in order to solve the above problems .
A passage for passing a human body, an object, etc.
Blowers and filters are defined and provided inside
The jet stream outlet facing the road side, the bottom facing the passage side
The side wind with return air flow inlets respectively opened
The trunk and the ceiling side of the passage so as to communicate with the side wind tunnel
Air shower device consisting of an upper wind tunnel defined in
And the blower can be switched between high and low speed operation.
Both jets on the same surface facing the passage side of the upper wind tunnel
An airflow outlet and a circulating airflow outlet are provided side by side,
When the human body, an object, etc. pass through the outlet, close the outlet,
To provide a shutter that opens the air outlet during normal operation
Therefore, a set of blowers arranged in the side wind tunnel and
Using only the filter, when passing the human body, objects, etc.
Operate the blower at high speed to the side wind tunnel and the upper wind tunnel.
High-speed jet into the passage from the provided jet air jet
And blow the air blower at low speed during normal operation.
Into the passage from the circulating airflow outlet provided in the upper wind tunnel
The clean air flow is down-flowed and circulated.
And features. Said blower is a human body passing through the passage,
Based on a detection signal of a detection means for an object or the like, it is preferable that the rotation is controlled to be high-speed rotation when a human body, an object or the like passes, and low-speed rotation when steady. Further, it is preferable that a shutter provided at the circulating airflow outlet is of a wind pressure operation type that opens and closes in response to an internal pressure of an upper wind tunnel. Further, it is preferable that the shutter provided at the circulating airflow outlet is an electrically operated type that opens and closes in response to an operation speed switching signal of the blower.

[0004]

The blower and the filter are used for high-speed jet airflow and circulation blower. The blower is used when a human body, an object, or the like passes based on a detection signal of a detecting means of a human body, an object, etc. passing in the passage. At the time of high-speed operation and non-passing steady state, the control is switched to low-speed operation. The shutter of the circulating air outlet opens and closes in response to the internal pressure of the upper wind tunnel or in response to an operation speed switching signal of the blower. When a human body, an object, or the like passes, the blower is operated at high speed based on a detection signal or the like of the detection means and the shutter is closed at the same time. Therefore, the pressure of the side wind tunnel and the upper wind tunnel increases, and a high-speed jet stream is jetted into the passage through the jet stream jet opening opening on the side wall of the passage and the jet stream jet opening opening on the ceiling, so that dust from the surface of a human body, an object, etc. Off. On the other hand, in a steady state in which a human body, an object, or the like does not pass, the blower is switched to low-speed operation and the shutter is opened. Therefore, the clean air flow blown through the filter, the side wind tunnel, and the upper wind tunnel flows down into the room through the circulating air outlet opening at the low speed to the passage ceiling side and the upper jet air outlet and the side jet air outlet. As a result, the air in the passage can be cleaned and maintained with a minimum required air volume while reducing the power consumption of the blower.

[0005]

1 is a structural view of an entire air shower apparatus according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, FIG. 3 is a sectional view taken along line III-III of FIG. FIG. 2 is a sectional view taken along the line IV-IV of FIG. 2, and FIGS. In the figure, reference numeral 1 denotes an apparatus main body, in which a passage 2 for passing a human body, an object, and the like is provided, and a side jet air outlet 4a is provided on a side wall 3 of the passage 2; Is provided with a return air flow inlet 5 at the lower part of the lower part. Further, a side wind tunnel 6 is defined on the side of the passage 2 so as to extend between the side jet stream outlet 4a and the return air stream inlet 5, and a high wind is formed inside the side wind tunnel 6. A blower 7 and a HEPA filter 8 capable of low-speed switching operation
Has been deployed. In addition, a circulating airflow outlet 10 and an upper jet airflow outlet 4b are provided in the ceiling 9 of the passage 2,
An upper wind tunnel 11 is defined above the ceiling 9, and the upper wind tunnel 11 communicates with the side wind tunnel 6.

The circulating airflow outlet 10 is partitioned by a circulating airflow partition 12, and a shutter 13 is provided in a ventilation window 12 a to the partition 12. The shutter 13 closes during high-speed operation of the blower 7 and opens during low-speed operation. As shown in detail in FIG. 5, the shutter 13 is provided so as to surround the periphery of the circulating air outlet 10 opened in the ceiling 9. One end of a spring receiver 14a fixed inside the circulating airflow partition 12 and the other end of the shutter 13 via a spring 14 having the other end fixed to the shutter 13 corresponding to the ventilation window 12a of the circulating airflow partition 12. Has been deployed.

When the wind pressure inside the upper wind tunnel 11 is high, the shutter 13 is pushed down to close the ventilation window 12a, and when the wind pressure inside the upper wind tunnel 11 is low, the elastic force of the spring 14 causes It operates so that the shutter 13 is pushed up and the ventilation window 12a is opened.

FIG. 6 shows another example of the mounting of the shutter 13. The shutter 13 with the balance weight 15 mounted on the ventilation window 12a as a fulcrum is provided. Here, in the state where the wind pressure inside the upper wind tunnel 11 is high, the side of the shutter 13 where the balance weight 15 is not mounted is pushed down to close the ventilation window 12a, and in the state where the wind pressure inside the upper wind tunnel 11 is low. The side of the shutter 13 on which the balance weight 15 is not mounted is pushed up by the weight of the balance weight 15, and the ventilation window 12a
Operates to be opened.

FIG. 7 shows still another example of the mounting of the shutter 13. The shutter 13 is provided so as to be in contact with the circulating air outlet 10 in the circulating air flow partitioning wall 12 corresponding to the ventilation window 12a. And the shutter 13 is
It is suspended by a spring 16 from a. Here the upper wind tunnel 11
When the internal wind pressure is high, the spring 16 is extended and the shutter 13 is pushed down to operate to close the circulating air outlet 10, and when the internal wind pressure in the upper wind tunnel 11 is low, the spring 16 tries to return to the original position. It operates so that the shutter 13 is pushed up by the elastic force and the circulating air outlet 10 is opened.

Next, the operation of the air shower apparatus having the above-described configuration will be described. When a human body, an object, or the like passes through the passage 2 of the air shower device, the blower 7 operates at high speed based on detection signals of the door switch 17 and the photoelectric sensor 18. As a result, the air sucked from the return air flow inlet 5 is blown into the side wind tunnel 6 through the blower 7 and the HEPA filter 8. Further, in this case, since the blowing air pressure of the blower 7 is high, the shutter 13 is closed, so that the air blown into the side wind tunnel 6 is blown out as a high-speed jet stream through the side jet stream outlet 4a, and the upper wind tunnel is also opened. The air blown into the inside 11 blows out as a high-speed jet stream through the upper jet stream jet port 4b, thereby removing dust adhering to the surface of a human body, an object, or the like.
The return airflow is sucked through the suction port 5 and returns to the blower 7. On the other hand, in a steady state where the door is closed and no human body, object, or the like passes through the passage 2, the blower 7 operates at a low speed based on the detection signal. Accordingly, the internal pressure of the upper wind tunnel 11 decreases, the shutter 13 is opened, and the circulating airflow outlet 10 on the ceiling 9 and the upper jet airflow outlet 4b downflow into the passage 2 and the passage from the side jet airflow outlet 4a. Laminar flow horizontally into 2. The airflow blown into the passage 2 is circulated through the return air inlet 5 to return to the blower 7.

[0011]

According to the present invention, since the high-speed jet airflow and the circulating airflow can be blown by sharing the blower, the number of devices used in the apparatus can be reduced and the passage partition in the wind tunnel can be simplified. It is possible to reduce the size and size of the entire apparatus and to reduce equipment costs. In addition, since the jet stream can be ejected not only from the side but also from above, the dust on the head of the human body can be efficiently captured. Moreover, despite the fact that the jet airflow outlet and the circulation airflow outlet are arranged on the same surface, the airflow performance of the air shower chamber can be increased in a steady state as in the conventional case because the blowing performance of the circulation airflow is not hindered.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an entire air shower device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along line III-III of FIG. 2;

FIG. 4 is a sectional view taken along line IV-IV in FIG. 2;

FIG. 5 is a configuration diagram of a main part of the air shower device.

FIG. 6 is a configuration diagram of a main part of another embodiment.

FIG. 7 is a configuration diagram of a main part of still another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Device main body 2 Passage 3 Side wall 4a Side jet stream outlet 4b Upper jet stream outlet 5 Return air stream inlet 6 Side wind tunnel 7 Blower 8 HEPA filter 9 Ceiling 10 Circulating air stream outlet 11 Upper wind tunnel 12 Circulating air stream Partitioning partition 12a Ventilation window 13 Shutter 14 Spring 14a Spring receiver 15 Balance weight 16 Spring 17 Door switch 18 Photoelectric sensor

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Mamoru Haeda 415 Sakunodani, Yuki-shi, Ibaraki Pref. Japan Inorganic Co., Ltd. Yuki Plant (56) References JP-A-64-63087 (JP, A) JP-A-1- 212849 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) F24F ^7/ 04-7/06

Claims (4)

(57) [Claims] 1. A human body, an object, etc., provided in an apparatus main body.
A passage to be passed through, and a blown air defined inside the passage.
With a filter and filter, and
Return air at the lower part of
Side wind tunnels each having an open air inlet, and the side wind tunnels
Upper wind defined on the ceiling side of the passage so as to communicate with
In an air shower device comprising a body, the blower can be operated to switch between high and low speed,
Jet stream jets on the same surface facing the passage side of the upper wind tunnel
An outlet and a circulating air outlet are provided side by side, and the circulating air outlet is provided.
The air outlet is closed when the human body or an object
Is equipped with a shutter that opens the air outlet.
A set of blowers and filters arranged in the side wind tunnel.
Only when the human body, objects, etc.
The machine is operated at high speed and installed on the side wind tunnel and the upper wind tunnel
High-speed jet gas into the passage from the jet jet outlet
Flow, and in a steady state,
Clean into the passage from the circulating airflow outlet provided in the upper wind tunnel
That the air flow is down-flowed and circulated.
Characterized air shower device. 2. The apparatus according to claim 1, wherein the blower is controlled to switch to high-speed rotation when passing a human body or an object, and to low-speed rotation when stationary, based on a detection signal of a detection means for a human body or an object passing through a passage. The air shower device according to claim 1, wherein 3. The air shower device according to claim 1, wherein a shutter provided at the circulating air flow outlet is a wind pressure operation type that opens and closes in response to an internal pressure of an upper wind tunnel. 4. The air shower device according to claim 1, wherein a shutter provided at the circulating air flow outlet is an electrically operated type that opens and closes in response to an operation speed switching signal of the blower.