JP2002214115A - Air cleaning device and its test system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air cleaning device and its test system capable of cleaning the air, and executing a leakage test having high precision and reliability on the cleaning state of the air. SOLUTION: This air cleaning device is constituted by a casing 1 for forming a ventilation route of the air to be cleaned, an HEPA filter 2 installed in the casing 1, for cleaning the air passing the casing 1, an upstream side detection hole 5 for capturing and guiding the air in the filter upstream side casing during the leakage test, and a sampling probe 8 movable in the filter upstream side casing, for capturing and guiding the air in the filter downstream side casing during the leakage test. This test system is constituted by having a DOP particle generator 20 for providing DOP particles into the filter upstream side casing, and a particle counter 19 for detecting the DOP particles included respectively in the upstream side air and the downstream side air guided from the upstream side detection hole 5 and the sampling probe 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air purifying apparatus used in an exhaust system of a business using chemical hazardous substances, for example, an antibiotic manufacturing room, and a test system therefor.

[0002]

2. Description of the Related Art Conventionally, in a manufacturing site using a chemical hazardous substance, such as an antibiotic manufacturing room, the atmosphere of the manufacturing site is passed through an air purification means to prevent the chemical hazardous substance from flowing out. I have. Examples of the air purifying means include a HEPA filter having a filtration efficiency of 99.97% or more for 0.3 μm DOP (dioctyl phthalate) particles and a 99.97% filtration efficiency for 0.1 μm particles.
An ULPA filter having a filtration efficiency of 999% or more is used.

In the exhaust system described above, for example, FIG.
An air purification unit as shown in FIG. 12 is known. This air purification unit is one in which a HEPA filter 2 is mounted in a casing 30 made of steel or SUS, and filters air containing hazardous substances flowing into the unit, and discharges only clean air to the outside. A prefilter 4 is attached to such an air purification unit as needed.

In the above unit, not only hazardous substances but also dusts accumulate on the HEPA filter as air is filtered. For this reason, the HEPA filter needs to be replaced periodically because the pressure loss increases due to clogging. In the unit, the seal between the HEPA filter and the casing is generally kept airtight by sponge packing. However, there is a possibility that a leak may occur from the seal due to deterioration of the packing over time. Therefore, it is necessary to periodically test and confirm that there is no leak from the HEPA filter or the seal portion when the filter is replaced or after a certain period of operation.

The above-described leak test will be described by taking the above-described unit as an example. The leak test of the air purification unit is performed by supplying test particles into the casing on the upstream side of the HEPA filter 2 and detecting the test particle concentration on the upstream and downstream sides of the HEPA filter 2 (FIG. 13). reference). The details are as follows. (1) Send air to the unit. (2) Inject the test particles (for example, DOP particles having a particle diameter of 0.3 μm) into the casing on the upstream side of the unit. (3) Particle detector (for example, particle counter 19)
Thus, the concentration of the test particles on the upstream side of the HEPA filter is measured. (4) Measure the concentration of the test particles downstream of the HEPA filter in the same way. (5) Check that the leak from the filter is equal to or less than the specified level from the ratio of the concentration of the test particles upstream and downstream of the HEPA filter. Reference numeral 20 denotes a DOP particle generator, 2
1 is a compressor, 22 is a differential pressure gauge.

Since the unit is used in an exhaust system,
The pressure downstream of the filter in the unit is negative compared to the pressure outside the unit. For this reason, in the leak test, the downstream side of the filter must be shut off from the outside of the unit with good airtightness so that particles outside the unit are not sucked to the downstream side of the filter and hinder detection of the leaked particles. For this reason, in the leak test of the unit, since the downstream side of the filter cannot be opened to the atmosphere outside the unit, as in a normal clean room in which a clean space is formed on the downstream side of the filter, an operator manually holds the probe at the outlet. I can't do a leak test. Therefore, usually, a method of forming a gas-tight air passage outside the unit on the downstream side of the filter by using the casing, installing a fixed pipe, or the like, and detecting leaked particles is used.

However, in this case, there are the following problems. (1) If the particle sampling position on the downstream side of the HEPA filter is close to the filter, if there is a leak at a location distant from the sampling position, the test particles leaking from the leak cannot be sampled and the leak is overlooked. Sometimes. (2) If the sampling position on the downstream side of the HEPA filter is set to a position sufficiently distant from the filter in order to reliably detect particles leaked from the leak, the leaked particles are diluted by clean air that has passed through the normal part of the filter. And may overlook relatively small leaks.

As for the leak test of the filter, as means for solving the above-mentioned problem, for example, Japanese Patent Laid-Open No.
A high-performance filter inspection device described in Japanese Patent Application Laid-Open No. 10294 is known. This inspection device has a particle supply means on the upstream side of the filter, a sampling probe on the downstream side,
A synchronous scanning mechanism is provided which causes the filters to be opposed to each other at a small interval, and scans the particle supply means and the sampling probe over the entire surface of the filter while maintaining the opposed relationship. This inspection apparatus is excellent in that the supply and the detection of the test particles are performed efficiently, so that the leak of the filter can be detected more accurately with a smaller supply amount of the particles.

[0009]

On the other hand, in recent years, the number of users who desire an air purifying apparatus capable of performing a leak test involving scanning when a filter is mounted has been increasing. The high-performance filter inspection device described in Japanese Patent Application Laid-Open No. H8-110294 is a device for detecting a leak of a filter. For example, when a HEPA filter is installed in an air purification device, there is a problem with installation or packing. It is not possible to detect a leak caused by attachment, such as deterioration of the device. Therefore, it may not always be appropriate to inspect the presence or absence of a leak when the HEPA filter is actually installed in the air purification unit.

[0010] It is an object of the present invention to provide an air purifying apparatus capable of purifying air and performing an accurate and reliable leak test on a state of purifying air, and a test system therefor. I do.

[0011]

According to the present invention, as a means for solving the above-mentioned problems, a casing forming an air passage for air to be purified and a casing provided in the casing and purifying air passing through the casing are provided. In an air purification device having an air purification unit, an upstream detection port that captures and guides air in a casing upstream of the air purification unit during a leak test and moves in a casing downstream of the air purification unit. An air purifying apparatus is provided, which is free and has a sampling probe that captures and guides air in a casing downstream of the air purifying means during a leak test.

According to the above configuration, since the casing and the air purifying means are provided, it is possible to purify the air, and since the apparatus has the upstream detection port and the sampling probe, the test particle supplying means and the test particle detecting means are provided. By using the means, it is possible to perform a leak test involving scanning in a state where air is purified.

Further, the present invention detects a leak in an air purifying apparatus having a casing forming an air passage for air to be purified, and air purifying means provided in the casing and purifying air passing through the casing. In a test system for performing a leak test, an upstream detection port that captures and guides air in the casing upstream of the air purification means during a leak test, and is movable in the casing downstream of the air purification means, At the time of a leak test, a sampling probe that captures and guides air in the casing downstream of the air purification unit, and a test particle supply unit that supplies test particles into the casing upstream of the air purification unit,
A test system comprising: an upstream detection port; and test particle detection means for detecting test particles contained in each of upstream air and downstream air guided from a sampling probe.

According to the above configuration, since a leak test involving scanning can be performed on the air purifying device, it is possible to specify a leak location and detect a minute leak while purifying air. It is possible to perform a leak test with high accuracy and reliability.

The casing is not particularly limited as long as it forms an air passage for air to be purified.
It is preferable that the device is made of US or steel in order to maintain the pressure resistance and airtightness of the device. In addition, it is preferable that the casing be provided with an inspection port larger than the size of the air purifying means, because maintenance such as replacement of the air purifying means becomes easier.

The air purifying means is not particularly limited as long as it traps particulate contaminants. Such air purifying means includes, for example, a HEPA filter and a UL filter.
A high-performance filter such as a PA filter can be exemplified, and an HEPA filter is preferably used as an air purification device for an exhaust system. The attachment of the air purifying means to the casing is performed in an airtight manner, but it is preferable to use a tightening member such as a long bolt and a nut or a cam to secure the airtightness of the attachment. .

The upstream detection port is not particularly limited as long as it can capture and guide the air in the casing upstream of the air purifying means at the time of the leak test, and can be connected to the test particle detecting means described later. It is preferable that the upstream detection port can be opened at the time of a leak test and can be sealed freely at the time of air purification. Examples of such an upstream detection port include a tubular body that is opened in a casing upstream of the air purification unit and that can be hermetically sealed, such as a vent pipe equipped with a valve, a pluggable socket, or the like. it can.

The upstream detection port is preferably opened in the casing on the upstream side of the purifying means so that the test particles in the casing on the upstream side of the purifying means can be appropriately measured during the leak test. A configuration that allows the sampling position on the upstream side to be adjustable by using a socket etc. that can be extended toward the inside of the casing, and a plurality of upstream detection ports are provided, and the upstream detection port at an appropriate location can be selected as appropriate Such a configuration may be adopted.

The sampling probe is movable in the casing downstream of the air purifying means, in particular, on the downstream end surface of the air purifying means and in the vicinity thereof, and in the casing downstream of the air purifying means during a leak test. Any device that captures and guides air may be used. The configuration that allows the sampling probe to move freely may be a configuration in which an operator manually moves the sampling probe, or a configuration in which the sampling probe automatically moves near the downstream end surface of the air purification unit. It is good, but it is preferable to use a structure that can be moved manually, because it can be made freely movable with a simple structure, there is little risk of becoming a contamination source during air purification, and it is also advantageous for specifying a minute leak location.

The sampling probe can be automatically moved, for example, by a first rail fixed along the side of the cross-sectional shape of the casing, a first rail movable along the first rail, and a first rail. A second rail extending in a direction perpendicular to the second rail, and a holding member movable along the second rail and extending in a direction perpendicular to the cross section of the casing. And a configuration in which the holding member moves in accordance with a predetermined program by holding a sampling probe in the robot arm, or a configuration in which the robot arm moves in accordance with a predetermined program by holding the sampling probe in the robot arm.

As a configuration in which the sampling probe can be manually moved, for example, a configuration in which the sampling probe is connected to the tip of a deformable and airtight tubular body can be exemplified.

As the sampling probe, a probe whose tip is wider than that of the base can be preferably exemplified. If a probe having an appropriate opening area at the tip is used, a leak test with high accuracy is performed. Preferred above. The opening area of the tip of the sampling probe can be appropriately determined according to the purifying ability and cross-sectional area of the air purifying means, the operating conditions of the air purifying device, and the like.

The shape of the opening at the tip of the sampling probe is preferably determined by the cross-sectional shape of the casing, the shape of the downstream end surface of the air purifying means, the shape of the attachment portion between the air purifying means and the casing, and the like. For example, if the cross-sectional shape of the casing is rectangular, and if the opening shape of the sampling probe is also rectangular, air can be captured without gaps even at the corners of the casing during a leak test, and more accurate scanning can be performed.

The sampling probe can be opened at the time of a leak test, and a downstream detection port, which can be freely sealed at the time of air purification, is provided in a casing downstream of the purifying means and connected to the downstream detection port in the casing. It is more convenient and preferable to conduct a leak test of the purifier. As such a downstream detection port, the same configuration as the above-described upstream detection port, that is, a tubular body that is opened in a casing downstream of the air purification means and that can be sealed,
For example, a vent pipe having a valve, a socket capable of plugging, and the like can be exemplified.

The test particle supply means is not particularly limited as long as it is a means for supplying test particles to the casing upstream of the air purification means, and may be a particle generator conventionally known in the art. Can be used.
As the test particle supply means, an appropriate means is used depending on the type of the test particles used in the leak test. The test particle supply means may not be directly connected to the casing upstream of the air purification means at the time of the leak test,
For example, it may be connected to a casing via an appropriate duct or the like to supply test particles.

Since the specifications of the leak test vary depending on the type of the air purifying means, the properties of the air to be purified, and the like, the test particle supply means is a means capable of freely adjusting the particle size and supply amount of the test particles. It is preferred that For example, when a HEPA filter is used as the air purifying means, the concentration of test particles having a particle diameter of 0.3 μm in the casing upstream of the filter is 10 ⁶ to 10 ⁷ particles / particle.
It is preferable to supply the test particles so as to be ft ³ (3.5 × 10 ^{7 to} 3.5 × 10 ⁸ particles / m ³ ). The particle size and the supply amount of the test particles can be adjusted depending on, for example, the type of nozzle for generating the test particles and the conditions for generating the test particles (for example, pressure and air volume).

The test particles include JIS Z 891
In general, dioctyl phthalate (DOP) particles, which are defined as two or more 13 or 14 dusts, are used. When the DOP particles are used as test particles, the test particle supply means includes, for example, as shown in JIS B9927,
A nozzle called Ruskin nozzle is immersed in the DOP liquid, and the particle diameter is 1 μm by the compressed air flow ejected from the nozzle hole.
Means for generating DOP particles of m or less can be used.

In an environment where volatilization of liquid mist such as DOP can be a source of contamination, it is preferable to use solid particles as test particles. Such test particles include:
For example, silica particles described in JP-A-8-136637 can be exemplified. For example, a colloidal silica suspension is charged into the test particle supply means when the silica particles are used as test particles, and a particle generator containing a Collison type atomizer and compressed air are supplied to the generator. Using an apparatus having an air supply pipe for feeding air, a filter, a regulator, a flow meter, and a pressure gauge connected to the air supply pipe, and a drying cylinder for drying the silica-containing droplet particles generated by the particle generator. be able to.

The upstream detection port and the sampling probe each take in air and guide it to test particle detection means such as a measuring instrument provided outside the casing. The test particle detection means is not particularly limited as long as it is a means for detecting test particles contained in each of the upstream air and the downstream air guided from the upstream detection port and the sampling probe. Known means can be used. An appropriate test particle detecting means is used depending on the type of the test particles to be used. As a test particle detecting means, for example, a particle counter (LASAIR) manufactured by PMS or JIS Z
For example, a light scattering type relative densitometer (for example, TDA-2E, manufactured by ATI Co., Ltd.) at 4812 can be exemplified.

In the present invention, it is preferable to have a window for externally observing the inside of the casing downstream of the air purifying means from the viewpoint of more accurate scanning at the time of a leak test and identification of a leak point. As such a window, for example, a configuration in which an opening provided in a casing on the downstream side of the purifying means is hermetically closed with a light-transmitting substance such as a transparent resin film or glass can be exemplified.

Further, in the present invention, it is preferable to have an operating means for freely operating the sampling probe in order to perform more accurate scanning at the time of a leak test and to specify a leak location. The operation means is not particularly limited as long as the sampling probe can be freely operated in the casing downstream of the air purification means (particularly, at the downstream end face of the air purification means and in the vicinity thereof). More preferably, it can be used for maintenance work. As such an operation means, a deformable and airtight glove such as a resin glove can be exemplified. Further, it is more preferable that the operation means is a transparent glove, since the state of the hand at the time of operation can be visually recognized.

When the operating means is a glove, an opening for inserting a hand into the glove may be provided at a desired position in the casing, and the glove may be provided so as to hermetically close the opening. It is preferable to be provided integrally with the window from the viewpoint of simplifying the configuration of the air purification device.

The air purifying apparatus of the present invention uses a member or the like made of metal such as SUS or steel as necessary, and has a fully welded structure except for a detachable portion, so as to improve pressure resistance, airtightness, and the like. It is preferable for maintaining. The air purification device of the present invention is preferably used in an exhaust system, but may be used to form a clean space, for example, by supplying purified air to a space closed by a chamber or the like. It can also be used as a unit that forms part of a clean space, a wall of a manufacturing room, or a ventilation path.

The test system of the present invention is a system for performing a leak test of an air purification device, but may be used for a leak test of an air purification unit.

[0035]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of an air purification apparatus and a test system for the same according to the present invention will be described. The air purifying apparatus according to the present embodiment is used for an exhaust system in a business establishment that uses a chemical hazardous substance, for example, an antibiotic manufacturing room. As shown in FIG. 1, this air purification device is provided on one side wall of the chamber and is flush with the wall surface to form a part of the wall surface of the chamber.
Of the room, the air is purified by the air purifying means, and the purified air is discharged through an exhaust duct (not shown) on the back side of the wall surface.

As shown in FIGS. 2 and 3, the air purifying apparatus according to this embodiment has a casing 1 forming an air passage, and an air purifying apparatus provided in the casing 1 for purifying air passing through the casing 1. And a HEPA filter 2 as means. A pre-filter 4 for collecting relatively large dust sucked with air is provided on the back surface of the suction port 3. Further, the casing 1 on the upstream side and the downstream side of the HEPA filter 2 is provided in the casing 1.
A differential pressure gauge 22 for detecting the internal pressure difference is provided.

The casing 1 discharges washing water during floor cleaning.
In consideration of the above, the floor surface
It is formed so as to be inclined downward toward the entrance 3
You. The HEPA filter used in the present embodiment
2 means that the processing air volume is 19.6m ^Three/ Min, pressure loss is 2
The filtration efficiency for particles of 50 Pa and 0.3 μm is 99.
99% or more filters. HEPA filter 2
A long bolt via a sealing member such as sponge packing
And the casing is airtight by a fastening member such as a nut.
It is attached to 1.

Upstream side (below) of HEPA filter 2
The casing 1 has an upstream detection port 5 that can be hermetically sealed when purifying air, and the casing 1 that is downstream (upper) of the HEPA filter 2 has a downstream detection port 6 that can be hermetically sealed when purifying air. I have. Both the upstream detection port 5 and the downstream detection port 6 are sockets that can be hermetically sealed by plug sealing, and these sockets are respectively attached to the casing 1 by welding. A deformable resin tube 7 is connected to the downstream detection port 6 inside the casing 1,
A sampling probe 8 is connected to the tip of the resin tube 7. The resin tube 7 has a length sufficient to move the sampling probe 8 on and around the downstream end surface of the HEPA filter 2.

The sampling probe 8 is shown in FIGS.
As shown in (1), a socket is provided at the base end, the cross-sectional area gradually increases from the base end to the front end, and the front end is formed in a rectangular opening shape. The sampling probe 8 is connected to the resin tube 7 via a joint connected to the tip of the resin tube 7.

An inspection port 9 is provided in the casing 1 downstream of the HEPA filter 2. This inspection port 9
Has a rectangular shape whose long side and short side are larger than the long side and the thickness of the HEPA filter 2. An inspection panel 10 that hermetically closes the inspection port 9 is detachably attached to the inspection port 9 with screws. The inspection panel 10 is provided with a scan test hatch opening 11. A scan test panel 12 that covers the scan test hatch opening 11 is detachably attached to the scan test hatch opening 11 with screws (FIGS. 4 and 5).

The hatch opening 11 for the scan test is air-tightly closed by an O-ring by a transparent vinyl bag 13. The vinyl bag 13 is integrated with the inspection panel 10 and constitutes a window for observing the inside of the casing 1 from the scan test hatch opening 11. The vinyl bag 13 is provided with a pair of gloves 14 integrally formed of the same material as the vinyl bag 13. The globe 14 is large enough to work at an arbitrary position in the casing 1 downstream of the HEPA filter 2 (FIGS. 4 and 5).

An exhaust flange 15 is connected to the upper part (downstream) of the casing 1. The exhaust flange 15 is formed to have a rectangular cross-sectional shape.
Inside, a damper 16 capable of adjusting the amount of purified air discharged from the casing 1 (the amount of air sucked into the casing 1) is provided. The exhaust flange 15 is connected to an exhaust duct (not shown), and the purified air is discharged outside through the exhaust duct. Note that a blower is provided in the ventilation path of the exhaust duct, and the blower is configured to suck indoor air into the air purification device.

The air purifying apparatus according to the present embodiment
EPA filter 2, pre-filter 4, resin tube 7,
Vinyl bag 13, glove 14, damper 16 and the O
Most of them are made of SUS except for rings and the like.

Next, the purification of air by the air purification device according to this embodiment will be described. During air purification,
The upstream detection port 5 and the downstream detection port 6 are sealed with a plug. The glove 14 is pulled out toward the outside of the casing 1, and is housed in a state of being folded between the scan test panel 12 and the vinyl bag 13. Also, as shown in FIG.
The inspection panel 10 and the scan test panel 12 are:
Each is attached with a screw.

When the blower is operated, the air in the room is sucked into the casing 1 from the suction port 3 and passes through the pre-filter 4. At this time, relatively large particles and dust are collected by the pre-filter 4. The air that has passed through the pre-filter 4 passes through the HEPA filter 2. At this time,
Particulate contaminants contained in the indoor air, such as chemical hazardous substances, are collected by the HEPA filter 2, and the air taken in from the room is purified. The purified air is discharged outside through the casing 1, the exhaust flange 15, and the exhaust duct.

Next, as one embodiment of the present invention, a test system for the air purification device (FIG. 8) will be described. At the time of the leak test, the scan test panel 12 is removed as shown in FIG. Then, the stored glove 14 is pushed out to the inside of the casing 1.

In the test system according to the present embodiment,
As shown in FIG. 10, the test particle supply means D
An OP particle generator 20 is connected to the suction port 3. Note that the DOP particle generator 20 may be connected to the suction port 3 via an appropriate duct as needed. The plugs of the upstream detection port 5 and the downstream detection port 6 are removed, the upstream detection tube 5 is connected to the upstream detection tube 17, and the downstream detection port 6 is connected to the downstream detection tube 18. Is done. Both detection tubes 17 and 18 are provided with a particle counter (LASAIR, P
(Manufactured by MS Corporation) 19.

Next, a leak test of the air purifying device by the test system according to the present embodiment will be described. In the leak test, first, DOP (dioctyl phthalate) particles are supplied from the DOP particle generator 20 as test particles. At this time, the DOP particles have a particle concentration of HEP.
10 ⁶ to 10 ⁷ pieces / ft ³ (3.5
× 10 ^{7 to} 3.5 × 10 ⁸ pieces / m ³ ). The particle concentration of the DOP particles is adjusted by the degree of opening of the damper 16 and the supply of compressed air from the compressor 21. Part of the air in the casing 1 on the upstream side of the filter is captured by the upstream detection port 5, guided to the upstream detection tube 17, and sent to the particle counter 19 through the upstream detection tube 17. The particle counter 19 detects DOP particles contained in the upstream air,
Measure the DOP particle concentration upstream of the filter.

When it is confirmed that the DOP particle concentration on the upstream side of the HEPA filter 2 is within the above range, the operator puts his hand in the glove 14, holds the sampling probe 8, and holds the HEPA filter 2 through the vinyl bag 13. The sampling probe 8 is scanned along the filter surface and the seal portion while observing the downstream end surface and its periphery. A part of the air in the casing 1 on the downstream side of the filter is captured by the sampling probe 8 being scanned, guided to the resin tube 7, and passed through the downstream detection port 6 and the downstream detection tube 18 to the particle counter 19. Sent. The particle counter 19 detects DOP particles contained in the downstream air and measures the concentration of the DOP particles downstream of the filter.

HE in the FDA's guidelines for sterile operation
Local permissible reference leak rate of PA filter is 0.01%
(10 ² to 10 ³ pieces / ft ³ or about 3.5 × 10 ^{3 to} 3.5
× 10 ⁴ pieces / m ³ ) or less. In the test system according to the present embodiment, the operating state of the device, the HEPA filter 2
The size of the sampling probe 8 may vary depending on conditions such as the size of the
By moving at a speed of about m / s, a leak test based on the above criteria can be performed.

Next, maintenance of the air purifying apparatus according to the present embodiment will be described. First, the filter replacement will be described. When a result exceeding the reference value is detected in the above-described leak test, when the purification ability of the HEPA filter 2 is reduced (for example, clogging is detected by the differential pressure gauge 22), or the end of the life of the HEPA filter 2 is reached. In some cases, the HEPA filter 2 may be replaced. To replace the HEPA filter 2, remove the scan test panel 12, put your hand in the glove 14,
While looking inside the casing 1 through the vinyl bag 13,
The fixed HEPA filter 2 is removed from the casing 1 (release of the lock).

After removing the HEPA filter 2, the inspection panel 10 is removed. The removed HEPA filter 2 is sealed in a vinyl bag or the like, carried out of the casing 1, and a new HEPA filter 2 is airtightly fixed to the casing 1. The leak test when the HEPA filter 2 is newly attached is performed in the same manner as the leak test described above. By such a filter replacement operation, it is possible to prevent contaminants such as chemical hazard substances trapped in the HEPA filter 2 from being scattered from the air purification device with the filter replacement operation. When removing the inspection panel 10 by replacing the HEPA filter 2, etc.,
The sampling probe 8 and the resin tube 7 may be cleaned or replaced.

Since the air before being purified passes through the casing 1 upstream of the HEPA filter 2, the casing 1 upstream of the HEPA filter 2 is relatively easily contaminated. When a leak test is performed, DOP particles adhere to the casing 1 on the upstream side of the filter. In such a case, washing is usually performed.

The air purification device of the present embodiment has a suction port 3 at the lower portion of the casing 1 and the HEPA filter 2 is mounted above the suction port 3.
At the time of washing, it is difficult for HEPA filter 2 to splash water.
The inside of the casing 1 on the upstream side of the EPA filter 2 can be washed with almost no water. Also,
Since the floor surface of the casing 1 is inclined downward toward the suction port 3, drainage during washing with water is good.

In the air purifying apparatus according to the present embodiment, the resin tube 7 may be removed from the downstream detection port 6 during air purification. The resin tube 7 and the sampling probe 8 can be airtightly inserted into the opening.
During the air purification, the resin tube 7 is inserted into the opening of the sampling probe 8 (that is, the internal space of the resin tube 7 and the sampling probe 8 is closed), and both are placed in the casing 1. May be stored. Such a configuration prevents foreign matter from entering the resin tube 7 and the sampling probe 8.

The air purifying apparatus according to the present embodiment comprises a casing 1 forming an air passage for air to be purified,
A HEPA filter 2 provided in the casing 1 for purifying air passing through the casing 1, an upstream detection port 5 for capturing and guiding air in the casing 1 upstream of the HEPA filter 2 during a leak test; Since it has a sampling probe 8 that is movable in the casing 1 downstream of the HEPA filter 2 and captures and guides air in the casing 1 downstream of the HEPA filter 2 during a leak test, Purification can be performed, and a leak test with high accuracy and reliability can be performed on the state of purifying air.

In the air purifying apparatus according to the present embodiment, the casing 1 downstream of the HEPA filter 2 is provided.
Since it has a vinyl bag 13 for observing the inside from the outside, the position of the sampling probe 8 can be visually recognized at the time of a leak test, and the work location can be visually recognized at the time of maintenance such as replacement of the HEPA filter 2. It can be done more easily.

Further, since the air purifying apparatus according to the present embodiment has the glove 14 for freely operating the sampling probe, it can be manually scanned at the time of the leak test, and the leak location can be specified. Is easier. Further, since the glove 14 is formed of transparent vinyl, the hand of the worker inserted into the glove 14 can be visually recognized, and scanning and maintenance work during a leak test can be performed more easily.

In purifying the air, the globe 14 is used.
Can be folded and stored between the scan test panel 12 and the vinyl bag 13 without disturbing the airflow in the casing 1 during air purification, and being stored when not in use. Hateful.

Further, in the air purifying apparatus according to the present embodiment, since the glove 14 is provided integrally with the vinyl bag 13, the air purifier is provided with an initial portion as compared with the case where the opening for the glove 14 is provided separately in the casing 1. Costs can be lower.

Further, since the air purifying apparatus according to the present embodiment has the inspection port 9, maintenance work such as replacement of the HEPA filter 2 can be performed more easily. Further, as shown in FIG. 1 and the like, the inspection port 9 is provided facing the room, so that maintenance work can be performed in the room, and the maintenance property is excellent.

Further, in the air purifying apparatus according to the present embodiment, since the floor surface of the casing 1 is formed to be inclined toward the suction port 3, the casing 1 upstream of the HEPA filter 2 after a leak test or the like. The inside of the casing 1 after the water washing is easily drained, and the inside of the casing 1 after the water washing can be easily made to be in a clean state, and the maintenance is excellent.

In addition to the above configuration, the test system according to the present embodiment includes a DOP particle generator 20 for supplying DOP particles into the casing 1 on the upstream side of the HEPA filter 2, an upstream detection port 5 and Since it has the particle counter 19 for detecting DOP particles contained in each of the upstream air and the downstream air guided from the sampling probe 8, it is possible to easily detect a minute leak and specify a leak location, and the air is removed. A leak test with high accuracy and high reliability can be performed on the air purification device in a state of purification.

In the test system according to the present embodiment, since the sampling probe 8 having a rectangular opening end is used for the casing 1 having a rectangular cross section, the corners of the casing 1 and the HEPA filter 2 are used. Even in the vicinity of the mounting portion (seal portion), the inside of the casing 1 on the downstream side of the filter can be completely scanned, and air around the corner can be captured and guided, so that a more precise leak test can be performed.

[0065]

The air purifying apparatus according to the present invention has an air purifying apparatus having a casing forming an air passage for air to be purified, and air purifying means provided in the casing for purifying air passing through the casing. , An upstream detection port that captures and guides the air in the casing upstream of the air purifying means during the leak test, and is movable in the casing downstream of the air purifying means. Since it has a sampling probe that captures and guides the air in the casing downstream of the means, the air can be purified, and a highly accurate and reliable leak test is performed on the state of purifying the air. be able to.

Further, the test system of the present invention provides an air purifying apparatus having a casing forming an air passage for air to be purified, and air purifying means provided in the casing for purifying air passing through the casing. In a test system for detecting leaks, an upstream detection port that captures and guides air in the casing upstream of the air purification unit during a leak test, and is freely movable in the casing downstream of the air purification unit A sampling probe that captures and guides the air in the casing downstream of the air purification means during a leak test, and a test particle supply means that supplies test particles into the casing upstream of the air purification means. And test particles contained in each of the upstream air and the downstream air guided from the upstream detection port and the sampling probe. The test particle detecting means for detecting air leakage, the air purifying device in the state where the air purifying means is actually provided, the presence or absence of leakage not only in the air purifying means but also in the mounting portion between the air purifying means and the casing Can be detected, and a leak test with high accuracy and reliability can be performed on the air purification device.

When the air purifying means is a HEPA filter, the air purifying apparatus and the test system of the present invention can also be used for purifying air that requires advanced purification such as collection and removal of chemical hazard substances. It is possible to perform a leak test of an air purification device that requires advanced purification.

Further, the air purifying apparatus and the test system of the present invention have a window for observing the inside of the casing downstream of the air purifying means from the outside. Also, the inside of the casing on the downstream side can be visually recognized, and more precise work can be easily performed in the maintenance work and the leak test.

The air purifying apparatus and the test system according to the present invention, if provided with operating means for freely operating the sampling probe, can perform scanning at the time of a leak test arbitrarily, thereby making it easier and more accurate. The leak location can be specified at the same time.

In the air purifying apparatus and the test system for the same according to the present invention, when the operating means is a deformable and air-tight glove integrally provided on the window, the initial cost can be further reduced, and the air purifying apparatus can be air-purified. At times, the operating means can be easily housed, hardly affecting air purification, and more effective in improving workability.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating an installation state of an embodiment of an air purification device according to the present invention.

FIG. 2 is a front view of the air purification device shown in FIG.

FIG. 3 is a cross-sectional view of a main part of a side surface of the air purification device shown in FIG.

FIG. 4 is an enlarged view of a main part of the front of the air purification device shown in FIG.

FIG. 5 is an enlarged sectional view of a main part of a side surface of the air purification device shown in FIG.

FIG. 6 is a front view showing a sampling probe of the air purification device shown in FIG.

FIG. 7 is a bottom view showing a sampling probe of the air purification device shown in FIG. 1;

FIG. 8 is a front view showing a state of the air purification device shown in FIG. 1 at the time of air purification.

FIG. 9 is a front view showing a state of the air purification device shown in FIG. 1 during a leak test.

FIG. 10 is a side sectional view showing a main part of one embodiment of the test system for the air purification device shown in FIG. 1;

FIG. 11 is a front view showing an example of a conventional air purification unit.

FIG. 12 is a side view showing an example of a conventional air purification unit.

FIG. 13 is a schematic diagram showing a test system in an example of a conventional air purification unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 30 Casing 2 HEPA filter 3 Suction port 4 Pre-filter 5 Upstream detection port 6 Downstream detection port 7 Resin tube 8 Sampling probe 9 Inspection port 10 Inspection panel 11 Scan test hatch opening 12 Scan test panel 13 Vinyl bag 14 glove 15 exhaust flange 16 damper 17 upstream detection tube 18 downstream detection tube 19 particle counter 20 DOP particle generator 21 compressor 22 differential pressure gauge

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Ken Amaya 1-25-1, Nishishinjuku, Shinjuku-ku, Tokyo Taisei Construction Co., Ltd. -23 (72) Inventor Kenji Matsuoka 172 Ikezawa-cho, Yamatokoriyama-shi, Nara Prefecture (72) Inventor Kazuyoshi Otsuka 8-2-1 Ginza, Chuo-ku, Tokyo 4D058 JA14 PA01 SA04 SA13

Claims (10)

[Claims] 1. An air purifying apparatus comprising: a casing forming an air passage for air to be purified; and air purifying means provided in the casing to purify air passing through the casing. An upstream detection port that captures and guides the air in the casing upstream of the means, is movable in the casing downstream of the air purification means, and is movable downstream of the air purification means during a leak test. An air purification device comprising: a sampling probe that captures and guides air in a casing. 2. The air purifying apparatus according to claim 1, wherein said air purifying means is a HEPA filter. 3. The air purifying apparatus according to claim 1, further comprising a window for externally observing the inside of the casing downstream of the air purifying unit. 4. The apparatus according to claim 1, further comprising operating means for freely operating said sampling probe.
The air purifying apparatus according to item 1. 5. The air purifying apparatus according to claim 4, wherein said operating means is a deformable and airtight glove integrally provided on a window. 6. A test for detecting a leak in an air purifying apparatus having a casing forming an air passage for air to be purified and air purifying means provided in the casing to purify air passing through the casing. In the system, an upstream detection port that captures and guides air in the casing upstream of the air purifying means during a leak test, and is movable in the casing downstream of the air purifying means. A sampling probe that captures and guides the air in the casing downstream of the air purifying unit at times, a test particle supply unit that supplies test particles into the casing upstream of the air purifying unit, and the upstream. Detects test particles contained in each of the upstream air and downstream air guided from the side detection port and the sampling probe. Test system, characterized in that it comprises a test particle detecting means. 7. The test system according to claim 6, wherein said air purifying means is a HEPA filter. 8. The test system according to claim 6, further comprising a window for externally observing the inside of the casing downstream of the air purification unit. 9. The apparatus according to claim 6, further comprising operating means for freely operating said sampling probe.
The test system according to 1. 10. The test system according to claim 9, wherein the operating means is a deformable and airtight glove provided integrally with the window.