JPH058417Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention cleans the work space and removes harmful dust such as asbestos dust that adheres to the clothes and belongings of workers during work in the work space. The present invention relates to an air shower device suitable for use in removing pathogens such as typhoid fever, cholera, etc.

(Prior Art) Conventionally, in order to clean a work space connected to an air shower device, an air cleaning device for the work space was required separately from the air shower device, which caused a problem of high equipment costs. Therefore, the special public official
As proposed in the publication, an air shower device consisting of a machine room a and a shower room b as shown in FIGS. An air shower device is known which is equipped with a clean air device that maintains the air pressure in the shower room B, prevents the contaminated air in the shower room B from going out into the work space C, and constantly supplies clean air into the work space C. There is.

More specifically, the ceiling duct d of the shower room b
A machine that is provided with an air outlet f into the shower chamber b and an air outlet e into the work space c, and connects the air outlet g provided at the lower part of the shower chamber b with the air outlet f. An air filter h is provided below the chamber a, and a first fan i blows out the clean air filtered by the air filter h from the air outlet f, and a second fan j operates at high speed to blow the air into a high-speed jet stream. The air is blown into the shower room b from the air outlet provided on the side wall k on the side of the shower room b to remove harmful dust, bacteria, etc. attached to clothing, etc., and the contaminated air is then discharged into the machine room a from the outlet g of the shower room b. At the same time, part of the air purified by the air filter h is blown out from the air outlet e of the ceiling duct d into the work space c to clean the work space c,
Contaminated air is sent into the shower room b from an air outlet n in the work space c provided at the lower part of the door m leading in and out of the shower room b. Then, the amount of air blown into the work space c is adjusted, and the amount of air sucked into the machine room a from the outlet g of the shower room b is adjusted.
By further reducing the amount of air blown into the shower chamber b, the inside of the shower chamber b is always maintained at a negative pressure.

(Problem to be solved by the invention) The conventional air shower device is designed to maintain negative pressure in the shower chamber b at all times, but the amount of air sucked into the machine room a from the exhaust port g of the shower chamber b is A is the sum of the amount of air blown out from the air outlet f of the ceiling duct d and the amount of air D sent from the work space c through the outlet n provided in the lower part of the door m. Therefore, contaminated air from the work space c will inevitably be sent into the shower room b. Therefore, there is no particular problem if the work space c is a room that does not contain harmful substances, such as in semiconductor manufacturing, but if the work space c is a room that does not contain harmful substances, such as those used in genetic recombination, or harmful bacteria. In the case of a bio-clean room handling Therefore, not only is there a high risk that harmful dust or bacteria may adhere to clothing, etc., but also contamination of the human body itself becomes a major problem.

An object of the present invention is to provide an air shower device that eliminates such conventional problems.

(Means for solving the problem) In order to achieve the above object, the present invention has a machine room,
In an air shower device that is disposed at the entrance/exit of a work space and blows clean air filtered in the machine room into the shower room and into the work space, the clean air is supplied into the work space above the side wall of the machine room. In addition to providing an air outlet that blows out the
An outlet for discharging air from the work space is provided below the side wall, a fan that can be switched between high-speed and low-speed operation and is always operated at low speed is provided at the bottom of the machine room, and an air filter is provided downstream of the fan in the machine room. A branch duct is installed downstream of the air filter to supply air purified by the air filter into the work space and the shower room, and when the air filter enters the shower room, the valve is opened in conjunction with the fan that switches to high-speed operation. The present invention is characterized in that a normally closed valve is provided in the duct on the shower room side of the branch duct.

(Function) When the shower room is not in use, the fan in the machine room is operated at low speed, and the normally-closed valve of the branch duct on the shower room side is closed, and the clean air purified by the air filter is discharged by the fan. The air blown into the work space through the air outlet and contaminated within the work space returns to the machine room through the outlet, is purified by the air filter, and then circulated into the work space. Clean air is not supplied into the shower room. Furthermore, when the shower room is in use, the fan is switched to high-speed operation, and the normally closed valve of the duct is opened to continue circulating and supplying clean air to the work space and supplying clean air into the shower room. As mentioned above, one fan is used to supply clean air to the shower room and to the work space.

(Example) The present invention will be explained with reference to the drawings.

Figures 1 and 2 show one embodiment of the present invention, which is installed at the entrance of a clean room such as a work space 1, such as a clean room for semiconductor manufacturing or a bio-clean room for genetic recombination research. be.

In the drawing, 2 indicates the shower room, 3 indicates the machine room,
The shower room 2 has a plurality of clean air outlets 4 supplied from the machine room 3 at the top and side of the room, and the air blown into the shower room 2 from the machine room 3 at the bottom. A discharge port 5 is provided for returning the air to the chamber 3. A ceiling duct 6 is provided above the room, and side ducts 7 are connected to the ceiling duct 6 at the sides of the room, and clean air is supplied to the air outlet 4 through the ceiling duct 6 and the side duct 7. The air was blown out into shower room 2.

In addition, the machine room 3 is provided with an air outlet 9 that blows out clean air into the working space 1 above the side wall 8 facing into the working space 1, and air blown into the working space 1 below the side wall 8. A discharge port 10 is provided for returning the water to the machine room 3, and the machine can be switched to high-speed or low-speed operation in conjunction with the opening and closing of a door 11 provided at the entrance and exit of the shower room 2, for example, at the lower part of the machine room 3. A fan 12 that operates at low speed when the shower room 2 is not in use is disposed, and an air filter 13 is disposed above the fan 12. Further, a branch duct 14 is arranged above the air filter 13 to branch and supply the air purified by the air filter 13 into the shower room 2 and the work space 1, and the duct 15 on the work space 1 side of the branch duct 14 is arranged above the air filter 13. Machine room 3
The duct 16 on the shower room 2 side of the branch duct 14 is connected to the ceiling duct 6 of the shower room 2, and
The duct 16 is provided with a normally closed valve 17 which opens in conjunction with the high speed operation of the fan 12.

Incidentally, as in the illustrated embodiment, the duct 15 on the work space 1 side of the branch duct 14 is provided with an arbitrarily adjustable air volume adjustment valve 18 that operates in conjunction with switching to high-speed operation of the fan 12. For example, it is possible to prevent the fan 12 switched to high-speed operation from blowing out more than a predetermined amount of air into the work space 1, and to constantly supply a predetermined amount of air into the work space 1. I can do it.

Next, to explain the operation of the above embodiment, when the shower room 2 is not in use, the door 11 is not opened or closed, so the fan 12 in the machine room 3 is operated at low speed, and the fan 12 in the branch duct 14 on the shower room 2 side is operated at low speed. The normally closed valve 17 of the duct 16 is closed, and the clean air purified by the air filter 13 is blown into the work space 1 by the fan 12 through the outlet 9, and the air inside the work space 1 is The contaminated air returns to the machine room 3 through the exhaust port 10, is purified by the air filter 13, and is circulated into the work space 1. At this time, clean air is not supplied into the shower chamber 2 due to the normally closed valve 17 being closed.

Furthermore, when the shower room 2 is used, the fan 12 is switched to high-speed operation in conjunction with the opening and closing of the door 11, and in conjunction with this, the normally closed valve 17 is opened and the fan 12 is switched to high-speed operation. Clean air with increased wind pressure is blown into the shower chamber 2 as a high-speed jet air stream through the outlet 4, removing harmful dust and bacteria from clothing, etc., and contaminated air is discharged from the outlet of the shower chamber 2. 5, the air is returned to the machine room 3, is cleaned again by the air filter 13, and is circulated and supplied to the shower room 2. At this time, the circulating supply of clean air to the work space 1 is continued with the supply air volume being adjusted to a desired amount by the air volume adjustment valve 18.

(Effects of the invention) Thus, with the air shower device of the present invention, by simply installing the air shower device in the work space, the work space can be constantly kept clean without having to install a new air purifier for the work space. Not only can clean air be efficiently supplied to both the shower chamber and the work space by switching a single fan between high and low speed operation, but the circulation supply path for clean air to the shower chamber and the circulation supply path for clean air to the work space are separate and independent, so contaminated air will not flow into the shower chamber, and the risk of contamination of the shower chamber with harmful dust or bacteria is minimized.

[Brief explanation of the drawing]

Figures 1 and 2 show one embodiment of the present invention, with Figure 1 being a partially cutaway perspective view with the door removed, and Figure 2 showing the air shower device of the present invention. Fig. 3 is a plan view showing the state in which it is placed at the entrance of the work space; Fig. 3 is a perspective view of the conventional air shower device with part of it removed and the door removed;
The figure is a plan view showing an example of the arrangement of a conventional device. 1... Work space, 2... Shower room, 3... Machine room, 8... Side wall, 9... Air outlet, 10... Discharge port, 12... Fan, 13... Air filter, 1
4... Branch duct, 16... Shower room side duct, 17... Normally closed valve.

Claims (1)

[Scope of utility model registration request] In an air shower device, which is composed of a machine room and a shower room, and is placed at the entrance/exit of a work space and blows clean air filtered in the machine room into the shower room and into the work space, there is a work space above the side wall of the machine room. An air outlet for blowing out clean air is provided inside the machine room, an air outlet is provided below the side wall for discharging air from the work space, and a fan is provided at the bottom of the machine room that can be switched between high-speed and low-speed operation and is always operated at low speed. , an air filter is provided downstream of the fan;
A branch duct is installed downstream of the air filter to supply air purified by the air filter into the work space and the shower room, and the valve is opened in conjunction with the fan that switches to high-speed operation when entering the shower room. An air shower device characterized in that a normally closed valve is provided in a duct on the shower room side of the branch duct.