Containment System

Abstract

To provide a wearing tool and a shut-in system which prevent a chemical hazard substance from leaking from a work booth and allow an operator to safely work without being exposed to the chemical hazard substance.SOLUTION: A wearing tool and a shut-in system comprise an air-supply port for supplying air and a ventilation surface located on the front face of an operator when worn, and blow the air supplied from the air-supply port toward the front of the operator through the ventilation surface.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention provides a method for protecting workers from chemical hazards. Wearing equipment and a work booth for containing chemical hazard materials. [Background technology]

[0002] Conventionally, a fume hood 102 as shown in Fig. 8 has been known as a work booth intended to protect workers such as researchers and experimenters from chemical hazard substances that are harmful to the human body. The fume hood 102 has a work space 104 where workers handle chemical hazard substances, and has the functions of containing and exhausting the chemical hazard substances (see, for example, Patent Document 1).

[0003] In the fume hood 102 described in Patent Document 1, an exhaust fan (not shown) is installed inside, allowing the worker 106 to work while introducing outside air into the work space 104. This prevents chemical hazard substances from leaking from the work space 104 while the worker 106 is working, allowing the worker 106 to work safely.

[0004] When working in such a fume hood 102, as shown in FIG. 8, a worker 106 inserts his or her hand into the work space 104 through an opening 108 formed in the front of the fume hood 102 to perform work. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2020-000966 Summary of the Invention [Problem to be solved by the invention]

[0006] Incidentally, when working in the above-described fume hood 102, the worker 106 stands in front of the fume hood 102 and therefore partially blocks the opening 108 of the fume hood 102. In this case, as shown in Figure 9, an airflow 110 blowing into the work space 104 is generated to the side of the worker 106, but no airflow 110 is generated in front of the worker 106.

[0007] In this case, part of the air current 110 blown into the work space 104 may flow around in front of the worker 106, forming a vortex air current 112 in front of the worker 106 (near the chest). As a result, there is a problem that the chemical hazard substance leaks near the chest of the worker 106, exposing the worker 106 to the chemical hazard substance.

[0008] Furthermore, when air sampling measurements are carried out for such leakage, the leakage value around the opening 108 of the fume hood 102 to the side of the worker 106 is below the detection limit, but near the chest of the worker 106, the leakage value can be more than 20 times the leakage value to the side of the worker 106, which is dangerous.

[0009] The object of the present invention is to prevent chemical hazard substances from leaking from a work booth such as a fume hood, so that workers can work safely without being exposed to chemical hazard substances. Containment System The purpose is to provide [Means for solving the problem]

[0010] The present invention Containment System teeth, Wearing protective clothing A harness worn on the worker's upper body and a work booth in which the worker wearing the harness inserts his or her hand into an opening to handle a chemical hazard substance, and the chemical hazard substance is contained within the work booth. And, The wearing tool is an air intake port for supplying air; When wearing The aforementioned A ventilation surface located in front of the operator Equipped with The work booth comprises: Located in front of the worker, When the worker puts his / her hand into the opening of the work booth to exhaust air, The air supplied from the air supply port is blown in front of the worker through the ventilation surface, thereby generating a new air current in front of the worker and preventing the formation of a vortex air current in front of the worker. and confine the chemical hazard material within the work booth. It is characterized by: In this way, by blowing air from the ventilation surface toward the front of the worker, the possibility of vortex air currents occurring is reduced, which in turn prevents chemical hazard substances from leaking from the work booth, allowing the worker to work safely without being exposed to chemical hazard substances.

[0011] In addition, the present invention Containment System teeth, The ventilation surface is characterized by being realized by forming the relevant portion of the wearing tool into a mesh shape, by disposing a breathable sheet, or by disposing a flow-regulating sheet. In this way, the breathable surface can be easily and inexpensively realized by simply disposing a general-purpose breathable material.

[0012] In addition, the present invention Containment System teeth, The breathability of the ventilation surface is characterized in that the wind speed on the surface is 0.2 m / s or more and 0.6 m / s or less. When the ventilation surface has such breathability, the ventilation surface can have a predetermined ventilation resistance, and air can be blown evenly from the entire ventilation surface.

[0013] In addition, the present invention Containment System teeth, The wearing tool is an outer garment having the breathable surface formed thereon; An inner garment located under the outer garment; Equipped with The intermediate garment is disposed in the lower layer of the wearing device at least in a portion where the ventilation surface is located, The air present in the space between the outer garment and the inner garment is blown toward the front of the worker through the ventilation surface. That is, by having such a structure, the wearing tool can efficiently retain air in the space between the outer garment and the inner garment and send the air forward through the ventilation surface.

[0014] In addition, the present invention Containment System teeth, A pressure-resistant hose for supplying compressed air from an external compressed air supply device is connected to the air inlet. In this way, by supplying compressed air, air can be blown in front of the worker with enough pressure to achieve a predetermined wind speed on the ventilation surface, thereby accurately preventing the entrainment of air currents containing chemical hazard substances.

[0015] In addition, the present invention Containment System teeth, The air intake port is connected to an air intake duct that supplies air blown by an external fan. That is, the present invention can be realized without necessarily using compressed air.

[0016] In addition, the present invention Containment System teeth, The air conditioner is characterized by including an air supply unit that supplies air to the air intake port. This allows you to work in places away from external compressors and fans.

[0017] In addition, the present invention Containment System teeth, The air conditioner is characterized by including an air supply passage for supplying air from the air supply port to the space. This limits the air flow path to the air supply path, preventing the wearing tool from expanding and allowing for comfortable wearing.

[0018] In addition, the present invention Containment System teeth, The ventilation surface is formed on the front body. That is, when a worker works in a work booth, the opening of the work booth is located in front of the worker's upper body, so it is preferable to form the ventilation surface on the front body.

[0019] In addition, the present invention Containment System teeth, The air conditioner is characterized in that a filter is provided at the air intake port or upstream of the air intake port. This makes it possible to prevent harmful substances from leaking into the wearing tool even if chemical hazardous substances are mixed into the outside air.

[0020] Also, The containment system of the present invention comprises: The aforementioned The ventilation surface is characterized by blowing air toward the opening of the work booth. This creates a new airflow, which can contain the airflow containing chemical hazard materials within the work booth.

[0021] The containment system of the present invention also comprises: The work booth is characterized by being a local exhaust ventilation system or a safety cabinet. That is, a local exhaust ventilation system or a safety cabinet is preferably used in the present invention. [Effects of the Invention]

[0022] According to the present invention, by blowing air from the ventilation surface toward the front of the worker, an air current similar to the air current formed around the work booth is generated in front of the worker. This prevents a vortex air current from forming in front of the worker. Furthermore, in a situation where a vortex air current may form in front of the worker, the air current can be counteracted and chemical hazard materials can be pushed back into the work booth. Thus, according to the present invention, chemical hazard materials are prevented from leaking from the work booth, allowing workers to work safely without being exposed to chemical hazard materials. Containment System can be provided. [Brief explanation of the drawings]

[0023] [Figure 1] FIG. 1 is a diagram showing a worker wearing a wearing device according to an embodiment. [Figure 2] 1 is a schematic diagram showing the structure of a wearing tool according to an embodiment. [Figure 3] 10A and 10B are schematic diagrams showing the structure of a wearing tool of another shape according to an embodiment. [Figure 4] 1 is a diagram showing a situation in which a worker wearing the wearing device according to an embodiment works in a work booth. FIG. [Figure 5] FIG. 10 is a diagram showing a situation in which an airflow is generated from in front of a worker toward a work booth in a containment system according to an embodiment. [Figure 6] 10A and 10B are schematic diagrams showing the structure of a wearing tool of another shape according to an embodiment. [Figure 7] 10A and 10B are schematic diagrams showing the structure of a wearing tool of another shape according to an embodiment. [Figure 8] FIG. 1 is a diagram showing a situation in which an operator works in a fume hood. [Figure 9] FIG. 1 is a diagram showing how airflow is drawn in when a worker works in a fume hood. DETAILED DESCRIPTION OF THE INVENTION

[0024] Hereinafter, with reference to the drawings, an embodiment of the present invention will be described. Containment System 1(a) and (b) are diagrams showing a state in which a worker 2 wearing protective clothing 1 is wearing a wearing device 4 according to an embodiment from above the protective clothing 1. FIG. 1(a) shows the appearance of the worker 2 as seen from the front, and FIG. 1(b) shows the appearance of the worker 2 as seen from the back. Also, FIG. 2 is a diagram showing an outline of the structure of the wearing device 4 when the worker 2 is seen from the side.

[0025] As shown in Figures 1(a), (b), and 2, the wearing device 4 has a vest-like shape that covers only the upper half of the body excluding the arms, and is equipped with an outer garment 6 that is positioned on the upper (outer) layer when worn by a worker 2, an inner garment 8 that is positioned underneath the outer garment 6, and an air intake port 12 for supplying air to the inside of the outer garment 6.

[0026] The outer garment 6 is a member for blowing air supplied from the air inlet 12 toward the front of the body of the worker 2. The outer garment 6 has a front body part 6a that covers the front of the body of the worker 2 and a back body part 6b that covers the back of the worker 2, and the front body part 6a of the outer garment 6 is formed with a ventilation surface 10 that is positioned in front of the worker 2 when worn.

[0027] The inner garment 8 is worn over the outer garment 6 so as to overlap at least the breathable surface 10 of the outer garment 6. In this embodiment, the front body 8a of the inner garment 8 overlaps with the front body 6a of the outer garment 6, and the back body 8b of the inner garment 8 overlaps with the back body 6b of the outer garment 6.

[0028] Furthermore, the inner garment 8 is sewn to the outer garment 6 so as to form a space 16 between them, and the inner garment 8 and the outer garment 6 form a double structure that can be separated from each other. Specifically, the inner garment 8 and the outer garment 6 are sewn together so closely (adhering) that the air in the space 16 can be ventilated as desired from places other than the ventilation surface 10.

[0029] Furthermore, the outer garment 6, except for the ventilation surface 10, and the inner garment 8 are each made of a material with low or no breathability. This allows air to be blown from the ventilation surface 10, while also making it possible to maintain the pressure inside the space 16 higher than the external air pressure (the pressure outside the wearing device 4) when air is supplied into the space 16, allowing the air inside the space 16 to be smoothly blown from the ventilation surface 10.

[0030] Furthermore, by forming the outer garment 6 from a material with low or no breathability except for the breathable surface 10, chemical hazard substances 30 can be prevented from penetrating into the inside of the outer garment 6 from the portions other than the breathable surface 10. Furthermore, by forming the inner garment 8 from a material with low or no breathability, chemical hazard substances can be prevented from passing through the inner garment 8 and unintentionally penetrating into the human body, and air supplied from the air inlet 12 can be prevented from leaking toward the body of the worker 2.

[0031] In this embodiment, the lower length of the outer garment 6 is longer than the lower length of the inner garment 8. That is, as shown in Fig. 2, the lower edge of the inner garment 8 is sewn to the lower part of the back surface of the outer garment 6, and the lower edge of the outer garment 6 extends lower than the lower edge of the inner garment 8. This prevents the space 16 from being wider than necessary and prevents chemical hazard substances 30 from entering through the gap between the inner garment 8 and the outer garment 6.

[0032] The breathable surface 10 is formed by making the front surface of the outer garment 6 mesh-like. Here, mesh-like refers to a fine mesh form (which may also be called woven or knitted fabric) such as highly breathable cloth or bleached fabric. In this way, the breathable surface 10 can be easily and inexpensively realized by simply arranging a general-purpose breathable material.

[0033] The breathability of the ventilation surface 10 is such that when air is blown at a blowing pressure of 50 Pa to 200 Pa, the wind speed on the surface of the ventilation surface 10 is preferably 0.2 m / s to 0.6 m / s, and more preferably 0.2 m / s to 0.5 m / s. In this way, since the ventilation surface 10 has a predetermined ventilation resistance, the air supplied from the air inlet 12 is pressurized to a level exceeding the ventilation resistance within the space 16, spreads throughout the space 16, and is blown evenly from the entire ventilation surface 10 (this will be described in detail later).

[0034] Air inlet 12 is formed below the back of outer garment 6 (around the waist when worn). A pressure-resistant hose 18 is connected to the outside of air inlet 12. The other end of this pressure-resistant hose 18 is connected to a compressor (not shown) that is an external compressed air supply device.

[0035] Alternatively, as shown in Figure 3, a wearing device 4' may be provided in which an air supply passage 14 is formed between the inner garment 8 and the outer garment 6. This air supply passage 14 is provided in a tubular shape at approximately the same height as the air supply port 12, joining the inner garment 8 and the outer garment 6 at their upper and lower boundaries, and connects the air supply port 12 to the space 16. As a result, air supplied from the air supply port 12 is blown through the air supply passage 14, the space 16, and the ventilation surface 10. In this case, air can be blown without providing an air supply port to which a hose or the like is connected in the front part, which is the main working surface, allowing the worker to work comfortably.

[0036] Next, the function of the harness 4 when the worker 2 wears it and works in a work booth will be described. Examples of work booths include local exhaust booths (hereinafter referred to as local exhaust booths) that have a fan installed inside to create an air current from the outside to the inside of the work booth, and safety cabinets that can maintain a clean space inside the work booth in addition to the function of a local exhaust booth.

[0037] Specifically, as shown in Fig. 4, the local exhaust booth uses a fan (not shown) installed in the exhaust section 28 to create an airflow from the outside to the inside of the local exhaust booth 20, protecting the worker 2 from chemical hazard materials 30. In addition, as shown in Fig. 8, the safety cabinet is configured to draw in air from within the work space 104 from the lower side of the opening 108, and the drawn-in air rises up the exhaust path 114. The rising air is exhausted from the exhaust port 116, but a portion of the air is supplied into the work space 104 by an air supply fan 118 through a HEPA filter 120. This keeps the work space 104 clean while protecting the workers 2 from chemical hazards. In this embodiment, the local exhaust booth 20 shown in Figure 4 will be described as an example.

[0038] 4 and 5, the local exhaust booth 20 includes a workbench 22, a hood 24, and an exhaust section 28, and chemical hazard substances 30 are handled on the workbench 22. An opening 32 is formed in the front face of the hood 24 (the face facing the worker 2) so that the worker 2 can insert his or her hand into the workbench 22 to handle the chemical hazard substances 30. The opening 32 is set based on the height range of the worker 2's chest.

[0039] First, the worker 2 puts on the harness 4 and stands upright facing the local exhaust booth 20 as shown in Figure 4. Next, the worker inserts his / her hand into the workbench 22 through the opening 32 to handle the chemical hazard material 30.

[0040] At this time, the exhaust section 28 of the local exhaust booth 20 operates to exhaust air from inside the hood 24. As a result, an air current 34 flows from the worker 2 side through the opening 32 into the hood 24 and is exhausted, thereby primarily reducing the risk of the worker 2 being contaminated with chemical hazard material 30.

[0041] When the compressor is operating, compressed air is supplied to space 16 through pressure-resistant hose 18, air inlet 12, and the gap between outer garment 6 and inner garment 8 (or through air inlet 14, if provided) (see FIGS. 2 and 3). A predetermined amount of compressed air remains in space 16 due to the predetermined airflow resistance of ventilation surface 10. When the air pressure in space 16 exceeds the airflow resistance of ventilation surface 10, the compressed air is blown from the entire ventilation surface 10 toward the front of worker 2. This airflow creates a new airflow 36, as shown in FIGS. 4 and 5, which flows into hood 24 through opening 32. The formation of airflow 36 prevents the generation of airflow 112, as shown in FIG. 9, even when worker 2 is working in front of opening 32. Even if airflow 112 does occur, it is pushed back into hood 24 (counteracting the flow), thereby containing chemical hazard material 30 within hood 24.

[0042] With the harness 4 according to this embodiment, air is blown from the ventilation surface 10 toward the front of the worker 2, generating an airflow 36 in front of the worker 2 similar to the airflow 34 formed around the local exhaust booth 20, preventing the formation of a vortex airflow 112 (see FIG. 9 ) in front of the worker 2. Furthermore, in a situation where a vortex airflow 112 may be formed in front of the worker 2, the harness 4 can cancel out the airflow 112 and push the chemical hazard material 30 back into the local exhaust booth 20. This prevents the chemical hazard material 30 from leaking from the local exhaust booth 20, allowing the worker 2 to work safely without being exposed to the chemical hazard material 30. The harness 4 and the local exhaust booth 20 form a containment system that contains the airflow containing the chemical hazard material 30.

[0043] Moreover, the breathable surface 10 can be realized by simply placing a general-purpose breathable material on the front of the outer garment 6, which is an easy and inexpensive method.

[0044] In the above embodiment, the case where the local exhaust booth 20 is used as the work booth has been described as an example, but the same effect can be expected even when a safety cabinet is used instead of the local exhaust booth 20.

[0045] Furthermore, in the above embodiment, the local exhaust booth 20 for standing work is exemplified, but the local exhaust booth 20 may also be for seated work.

[0046] Furthermore, in the above-described embodiment, the ventilation surface 10 does not necessarily have to have uniform ventilation resistance over its entire surface. For example, if the mounting device 4 has an air intake passage 14 (see FIG. 3), the amount of blowout may be adjusted by adjusting the ventilation resistance in parts, such as by increasing the ventilation resistance closer to the air intake passage 14. Furthermore, the ventilation resistance at the center of the ventilation surface 10 (a position exactly facing the opening 32 of the local exhaust booth 20) may be smaller than the ventilation resistance above and below it.

[0047] In the above-described embodiment, the inner garment 8 is not necessarily required as long as an enclosed space that allows air to be blown forward through the ventilation surface 10 can be formed between the outer garment 6 and the human body.

[0048] Furthermore, in the above-described embodiment, the breathable surface 10 is formed by meshing the front surface of the outer garment 6, but other methods may be used. For example, the breathable surface 10 may be formed by placing a breathable sheet on the front surface of the outer garment 6, or the breathable surface 10 may be formed by placing a rectifying sheet on the front surface of the outer garment 6. Here, the breathable sheet refers to a thin porous sheet that is not a knitted fabric such as a nonwoven fabric, such as a urethane sheet. Furthermore, the rectifying sheet may be, for example, a punched mesh with many holes in a thin resin sheet. The holes are most commonly in the form of round dots.

[0049] Furthermore, in the above-described embodiment, the air inlet 12 does not necessarily have to be located below the back of the outer garment 6 (around the waist when worn). The air inlet 12 may be located on the front or side of the worker 2, and the location is not limited. However, in consideration of workability, such as preventing interference between the arms and the pressure-resistant hose 18, it is preferable to locate it on the back. Also, around the waist is preferable.

[0050] In the above embodiment, a pressure-resistant hose 18 that connects a compressor to the air inlet 12 is connected to the air inlet 12. Alternatively, an air inlet duct (flexible duct) that connects an external air intake fan (blower) to the air inlet 12 may be connected to the air inlet 12. In this case, the air pressure is lower than when a compressor is used, making it difficult to supply air through the air inlet passage 14, as shown in FIG. 3 of the above embodiment. For this reason, as shown in FIG. 2, it is preferable to place the inner garment 8 entirely under the outer garment 6, and use the space 16 formed between the inner garment 8 and the outer garment 6 as the air inlet passage to blow air from the ventilation surface 10 toward the front of the worker 2.

[0051] Furthermore, in the above-described embodiment, instead of supplying air from an external compressor, the wearing device 4 may be provided with an air supply unit that supplies air to the air inlet 12. Specifically, a fan may be provided as an air supply unit in the air inlet 12, and by blowing air toward the inside of the outer garment 6, the pressure inside the outer garment 6 may be made higher than the external air pressure and the airflow resistance of the ventilation surface 10. This allows work to be performed even in a location away from the compressor. Furthermore, instead of the air supply unit, the wearing device 4 may be provided with a blower whose sole purpose is to blow air from the ventilation surface 10. Specifically, a fan that blows air outward may be provided on the ventilation surface 10, forcing an airflow toward the front.

[0052] In the above-described embodiment, as shown in Fig. 6, the space 16 may be formed only in the area of ​​the front body 6a of the outer garment 6 of the worker 2 where the ventilation surface 10 is located. In this case, the inner garment 8 and the outer garment 6 form a double structure only in the area where the ventilation surface 10 is located, and the outer garment 6 and the inner garment 8 may be in close contact with each other in the area other than the area where the ventilation surface 10 is located, or may be composed of either the inner garment 8 or the outer garment 6. An air supply path 14 may be formed between the inner garment 8 and the outer garment 6 around the waist of the worker 2, or a separate tubular member may be provided and communicate with the space 16. Note that the inner garment 8 need not be provided in the area other than the area where the ventilation surface 10 is located.

[0053] Even with such a structure, it is possible to provide the wearing equipment 4'' that prevents chemical hazard substances 30 from leaking from a work booth such as a fume hood, and allows the worker 2 to work safely without being exposed to the chemical hazard substances 30.

[0054] In the above-described embodiment, as shown in FIG. 7, the wearing device 4''' may be configured to be worn only on the front of the worker 2 in the form of an apron. In this case, the back portions of the inner garment 8 and outer garment 6 do not exist, and the air inlet 12 is formed directly in the front portion 8a of the inner garment 8. This also achieves the object of the present invention.

[0055] Furthermore, in the above-described embodiment, a vest-shaped wearing device 4 is exemplified, but the wearing device 4 may also be one that covers the arms or the entire body. Furthermore, the ventilation surface 10 may be provided not only on the front body but also on the entire front of the worker 2. This type of wearing device 4 can be used, for example, when the workbench 22 of the local exhaust booth 20 is low and the opening 32 is wide open at the top and bottom.

[0056] In the above embodiment, the case has been described in which the worker 2 wearing the protective clothing 1 puts on the wearing equipment 4 over the protective clothing 1, but the wearing equipment 4 may be formed integrally with the protective clothing 1. In other words, the wearing equipment 4 may be located on the outermost surface of the protective clothing 1.

[0057] In the above-described embodiment, if the work table 22 of the local exhaust booth 20 is positioned high, the ventilation surface 10 may be formed only at the chest level.

[0058] Furthermore, in the above-described embodiment, the direction of airflow is not necessarily limited to the front of the worker 2, as long as it is in the direction in which the chemical hazard substance 30 is handled. For example, in the hood 24 shown in FIG. 5 , the workbench 22 is L-shaped or U-shaped in plan view (viewed from above), and the work space in which the chemical hazard substance 30 is handled is located to the side of the worker 2. In this case, the ventilation surface 10 may also be located on the side of the worker 2. In this case, air is also blown to the side of the worker 2. Also, assuming that the worker 2 works at a slight angle to the front, the ventilation surface 10 may be positioned slightly toward the body from the front in the direction in which the chemical hazard material 30 will be handled, and air may be blown in an oblique direction.

[0059] Furthermore, in the above-described embodiment, a filter may be provided at the air intake port 12 or upstream of the air intake port 12. Specifically, the filter may be provided at the intake port through which the air intake fan takes in air, the air outlet through which air is sent from the air intake fan to the air intake duct, inside the air intake duct, or at the air intake port 12. This makes it possible to prevent chemical hazard substances 30 from entering the wearing device 4 even if they are mixed into the outside air. [Explanation of symbols]

[0060] 1...protective clothing, 2...worker, 4, 4´, 4´´, 4´´´...wearing equipment, 6...outer garment, 6a...front body, 6b...back body, 8...internal garment, 8a...front body, 8b...back body, 10...ventilation surface, 12...air intake port, 14...air intake path, 16...space, 18...pressure-resistant hose, 20...local exhaust booth, 22...workbench, 24...hood, 28...exhaust section, 30...chemical hazard substance, 32...opening, 34...air flow, 36...air flow, 102...fume hood, 104...work space, 106...worker, 108...opening, 110...air flow, 112...air flow, 114...exhaust path, 116...exhaust port, 118...air intake fan, 120...HEPA filter

Claims

1. A containment system comprising: a harness to be worn on the upper body of a worker wearing protective clothing; and a work booth into which the worker wearing the harness inserts his or her hand into an opening to handle chemical hazard substances, the containment system containing the chemical hazard substances within the work booth, The wearing tool is an air intake port for supplying air; a ventilation surface located in front of the worker when worn; Equipped with The work booth comprises: Located in front of the worker, A containment system characterized in that, when the worker inserts his or her hand into the opening of the work booth to exhaust air, the air supplied from the air intake port of the wearing device is blown forward of the worker through the ventilation surface, creating a new airflow in front of the worker and preventing the formation of a vortex airflow in front of the worker, thereby containing the chemical hazard material within the work booth.

2. 2. The containment system according to claim 1, wherein the ventilation surface is achieved by forming the corresponding portion of the wearing device into a mesh, by placing a breathable sheet, or by placing a flow-regulating sheet.

3. 3. The containment system according to claim 1, wherein the ventilation surface has a ventilation performance such that a wind speed on the surface is between 0.2 m / s and 0.6 m / s.

4. The attachment device is an outer garment having the breathable surface formed thereon; An inner garment located under the outer garment; Equipped with The intermediate garment is disposed in the lower layer of the wearing device at least in a portion where the ventilation surface is located, A containment system as described in any one of claims 1 to 3, characterized in that air present in the space between the outer garment and the inner garment is blown toward the front of the worker through the ventilation surface.

5. 5. A containment system according to claim 1, wherein a pressure-resistant hose for supplying compressed air from an external compressed air supply device is connected to the air intake port.

6. 5. The containment system according to claim 1, wherein an air intake duct is connected to the air intake port to supply air blown by an external fan.

7. 5. The containment system according to claim 1, further comprising an air supply unit that supplies air to the air inlet.

8. 5. The containment system according to claim 4, further comprising an air supply path for supplying air from the air supply port to the space.

9. 9. The containment system of claim 1, wherein the breathable surface is formed on the front body.

10. 10. A containment system according to any one of claims 1 to 9, further comprising a filter at or upstream of the air inlet.

11. A containment system described in any one of claims 1 to 10, characterized in that the ventilation surface blows air toward an opening in the work booth.

12. 12. The containment system according to claim 11, wherein the work booth is a local exhaust ventilation system or a safety cabinet.

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