JP7080838B2 - Air shower device - Google Patents

Description

The present invention relates to an air shower device for preventing dust and insects from invading a clean room in a food factory, a semiconductor manufacturing factory, or the like.

An insect repellent air curtain device for preventing the invasion of insects is described in Patent Document 1. In this patent document 1, "at a position where the air curtain flow from both sides intersects when the air curtain flow facing the outdoor side at a predetermined angle from both sides toward the passage space is blown out, the air curtain flow For the purpose of preventing insects and the like from entering from the upper part, an eave is provided in the passage space so as to cover the upper part of the intersection position. ”(Paragraph [0008]).

Japanese Unexamined Patent Publication No. 2007-163054

Patent Document 1 describes an insect repellent air curtain device that prevents the invasion of insects. However, the device described in Patent Document 1 does not consider insects that invade by crawling on the floor or ceiling. Therefore, it is not possible to completely prevent the invasion of insects into the device, and it is not possible to treat the invaded insects.

An object of the present invention is to provide an air shower device that catches insects that crawl on the floor surface and the like and insects that have invaded the inside of the device and prevent the invasion of insects into a clean room.

To give an example of the "air shower device" of the present invention for solving the above problems,
An air shower device that removes dust by blowing air from a fan onto a human body or an article in an air shower room through a main filter, and sucks in insects between the floor surface and the lower end of the door opening. A port is provided, an insecticidal means is provided in the flow path leading to the external air suction port, an internal air suction port is provided in the lower part of the air shower chamber, and the internal air suction port is connected to the insecticidal means .

According to the present invention, it is possible to provide an air shower device that catches insects that crawl on the floor surface and the like and insects that have invaded the inside of the device and prevent the invasion of insects into a clean room.
Issues, configurations and effects other than those described above will be clarified by the following description of the embodiments.

The front view which shows the main part of the air shower apparatus which concerns on Example 1 of this invention. The right side sectional view seen from the XX cross section of the air shower apparatus shown in FIG. 1. The right side sectional view seen from the YY cross section of the air shower apparatus shown in FIG. 1. The front view seen from the ZZ cross section of the air shower apparatus shown in FIG. FIG. 3 is a plan view showing a state in which the front door of the air shower device shown in FIG. 1 is opened. The block block diagram which shows the electric system of the air shower apparatus which concerns on Example 2 of this invention.

An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a front view of the air shower device 1 according to the first embodiment of the present invention. Further, FIG. 2 shows a cross-sectional view of the right side surface seen from the XX cross section of FIG. 1, and FIG. 3 shows a cross-sectional view of the right side surface seen from the YY cross section. Further, FIG. 4 shows a front view seen from the ZZ cross section of FIG. 2. In each figure, the arrows indicate the air flow, the solid line arrow indicates the air flow such as the air curtain with the door open, and the dotted line arrow indicates the air flow such as the air jet stream with the door closed. ..

The air shower device 1 is an air shower chamber inside the air shower device, like the conventional device, and has air jet streams Ca, Cb, blown from air jet outlets 4a, 4b, and 4c provided on both side surfaces and the upper surface. Cc is sprayed on the user 15 and articles to remove dust and dirt adhering to the user 15 and articles. Air containing dust and dirt sprayed on the user 15 and articles is sucked from the internal air suction port 7 at the lower part of the air shower room and circulates in the air shower device.

As a characteristic configuration, the air shower device 1 of the present embodiment is provided with an external air suction port 2 between the floor surface and the lower end of the opening of the door 13 (for the door, see FIG. 5) on the entrance / exit side. The external air suction port 2 is provided over the entire length of the lower end of the door opening. The external air suction port 2 may be a plurality of holes as shown in FIG. 1 or a single elongated hole. Air curtain outlets 3a, 3b, and 3c are provided on both sides and the upper end of the opening of the door 13. The air curtain outlets 3a and 3b on both sides of the door opening are provided over almost the entire length on both sides of the door opening, and the air curtain outlets 3c at the upper end of the door opening are above the door opening. It is installed over almost the entire length. The air curtain outlets 3a, 3b, and 3c are formed of linear slits and are provided so as to blow air toward the inside in the front direction of the door opening. That is, the air curtain outlets 3a and 3b provided on both sides of the door opening are provided so as to intersect inward so that the air flows intersect in front of the door opening. Further, the air curtain outlet 3c provided above the door opening is provided so as to be inclined toward the front lower side of the door opening.

As shown in FIG. 2, inside the side wall of the air shower chamber, an electric insecticide 11, a pre-filter 12, a fan 6 driven by a motor 5, a ventilation passage 8, and a main filter 10 are provided from below. .. Further, in the ventilation passage 8, a damper 9a that blocks and opens the airflow toward the air curtain outlets 3a, 3b and 3c, and a damper 9a that blocks and opens the airflow toward the air jet outlets 4a, 4b and 4c through the main filter 10 are blocked and opened. A damper 9b is provided so as to be switchable.

The operation of the air shower device 1 will be described. When the door 13 is opened to use the air shower device 1, air is sucked from the external air suction port 2 by the motor 5 and the fan 6 installed in the housing. In FIG. 1, arrow A indicates an external air suction airflow. Since the external air suction port 2 is installed near the floor surface, it is possible to suck and catch insects that crawl on the floor and invade the air shower device 1. As shown in FIG. 2, the inhaled insects are killed by the electric insecticide 11 installed inside the air shower device 1 to prevent the caught insects from escaping from the inside of the device. Insects and dust that have passed through the electric insecticide 11 are caught by the pre-filter 12 installed downstream of the electric insecticide 11. Insects that have passed through the electric insecticide 11 are attracted to the electric insecticide 11 by an attraction mechanism such as a light of the electric insecticide 11, particularly a black light, and are killed.

The air sucked from the external air suction port 2 passes through the ventilation passage 8 and the air damper 9a, and is blown out from the air curtain outlets 3a, 3b, and 3c to the front of the door opening. The air curtain outlets 3a, 3b, and 3c are installed on both sides and the upper side of the opening of the air shower device 1, and the air curtain airflows Ba, Bb, and Bc are blown toward the inside in the front direction of the device by the wind pressure. Prevent the invasion of flying insects. It also blows away insects that crawl from both sides and above the door opening.

As shown in FIG. 5, by setting the position of the hinge 14 for opening and closing the door 13 to be outside the air curtain outlet 3a, the door 13 and the air curtain outlet 3a can be used even in the air shower device 1 with a manually opened door. Air can be blown out from the air curtain outlet 3a without interfering with the air curtain.

When the user 15 enters the air shower chamber and the door 13 is closed, the dampers 9a and 9b are switched, and the air sent from the fan 6 passes through the main filter 10 and is provided on the side and above of the air shower chamber. The jet outlets 4a, 4b, and 4c are sprayed onto the user 15 in the air shower room. Motor 5 used to generate air jet streams Ca, Cb, Cc blown out from air jet outlets 4a, 4b, 4c through the main filter 10 and air curtain airflows Ba, Bb, Bc to prevent the invasion of insects. By using the same fan 6, the number of motors can be reduced and the housing can be made compact.

Insects that have invaded the air shower chamber of the air shower device 1 are sucked into the housing through the internal air suction port 7 at the bottom of the device by the air jet streams Ca, Cb, and Cc when the air jet is operated. The sucked insects are killed by the electric insecticide 11 and collected by the pre-filter 12 in the same manner as in the case of sucking by the external air suction port 2.

According to this embodiment, an external air suction port is provided between the floor surface and the lower end of the door opening, and an insecticide is provided in the flow path leading to the external air suction port. Can catch insects. In addition, air curtain outlets are provided on the sides and above the door opening to blow out the air jet stream toward the inside in the front direction of the device, so that flying insects and crawling insects can be affected by wind pressure. It can be blown away and prevent insects from entering the air shower room. Then, it is possible to surely prevent the invasion of insects into the clean room following the air shower device. Further, insects that have invaded the air shower chamber are sucked in from the internal suction port at the bottom of the air shower chamber, and can be caught by an insecticide provided in the flow path leading to the internal air suction port.

FIG. 6 shows a block configuration diagram of an electric system of the air shower device according to the second embodiment of the present invention. The air shower device of the second embodiment includes a door open / close detecting means 22 for detecting an open / closed state of the door 13, a human article detecting means 24 for detecting a person or an article in the air shower room, and a control circuit 20. The control circuit 20 inputs a door open / close detection signal from the door open / close detection means 22 and a human article detection signal from the human article detection means 24, and outputs a switching signal of the damper 9a and the damper 9b and a drive signal of the motor 5. ..

The operation of the air shower device of this embodiment will be described. When the door open / close detecting means 22 detects that the door 13 is open, the control circuit 20 switches the damper 9a so as to send the air from the fan 6 to the air curtain outlets 3a, b, c. When the door open / close detecting means 22 detects that the door 13 is closed, the damper 9b is switched to send the air from the fan 6 to the main filter 10. Then, when the door open / close detecting means 22 detects that the door is open, the air shower device 1 blows the air from the fan 6 forward from the air curtain outlets 3a, b, c. On the other hand, the control circuit 20 is from the fan 6 when the human article detecting means 24 detects a person or an article in the shower room and the door open / close detecting means 22 detects that the door is closed. The motor 5 is controlled so that air is blown to a person or an article in the air shower room through the main filter 10. Then, the control circuit 20 stops the motor 5 after operating the motor for a predetermined time required to remove dust of a person or an article.

According to this embodiment, the air shower device can be automatically controlled according to the open / closed state of the door and the presence / absence of a person or an article in the air shower room.

1 ... Air shower device 2 ... External air suction ports 3a, 3b, 3c ... Air curtain outlets 4a, 4b, 4c ... Air jet outlets 5 ... Motor 6 ... Fans 7 ... Internal air suction ports 8 ... Air passages 9a, 9b ... Damper 10 ... Main filter 11 ... Electric insecticide 12 ... Pre-filter 13 ... Door 14 ... Butterfly 15 ... User 20 ... Control circuit 22 ... Door open / close detection means 24 ... Human article detection means A ... External air suction airflow B ... Air Curtain airflow C ... Air jet airflow

Claims (9)

An air shower device that removes dust by blowing air from a fan onto a human body or an article in an air shower room through a main filter.
An external air suction port for sucking insects is provided between the floor and the lower end of the door opening.
An insecticidal means is provided in the flow path leading to the external air suction port.
An internal air suction port is provided at the bottom of the air shower room.
An air shower device in which the internal air suction port is connected to the insecticidal means . In the air shower device according to claim 1, further
An air shower device characterized in that an air curtain outlet for blowing air toward the inside in the front direction of the door opening is provided on the side and above of the door opening. In the air shower device according to claim 1,
The insecticidal means is an air shower device characterized by being an electric insecticide. In the air shower device according to claim 1,
An air shower device characterized in that a pre-filter for collecting insects is provided on the downstream side of the insecticidal means. In the air shower device according to claim 2,
The air shower device is characterized in that the air curtain outlet is provided over the entire length on the side of the door opening and the entire length above the door opening. In the air shower device according to claim 2,
An air shower device characterized in that the hinge of the door is located outside the air curtain outlet. In the air shower device according to claim 2,
An air shower device comprising a damper for switching whether air from the fan is sent to the main filter or the air curtain outlet. In the air shower apparatus according to claim 7 ,
It has a door open / close detection means and a control circuit.
The control circuit is
When the door open / close detecting means detects that the door is open, the damper is switched to send the air from the fan to the air curtain outlet.
An air shower device characterized in that when the door open / close detecting means detects that the door is closed, the damper is switched to send air from the fan to the main filter. In the air shower apparatus according to claim 8 ,
Equipped with a human article detection means to detect a person or an article in the air shower room,
The control circuit uses the air from the fan as a main filter when the human article detecting means detects a person or an article in the air shower room and the door open / close detecting means detects that the door is closed. An air shower device characterized in that it is controlled to be sprayed onto a human body or an article through the air shower device.

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