JPH05288378A - Clean room - Google Patents

Abstract

PURPOSE:To provide a clean room which can be constructed without necessity of a large duct space behind a ceiling of a clean zone and in which a facility can be easily extended. CONSTITUTION:Package air conditioners 22 of the number necessary for capacity of a clean room 20 are provided in a ceiling plenum 26 of a clean zone 24. Fresh air is sucked from an outside air inlet duct 30 connected to the suction side of the conditioners 22 and air conditioned. Then, the air is purified through an HEPA filter unit 34 attached to the supply air side of the conditioners 22, and air conditioned clean air is diffused to the zone 24. Thus, a duct system arranged in the ceiling plenum 26 may include only the duct 30 for introducing the fresh air to the conditioners 22, and a supply duct, a circulation duct which are observed in a conventional clean room 20 are not required. Accordingly, since it is not necessary to provide a large space for arranging a duct in the ceiling plenum 26, the room 20 can be constructed even in a narrow ceiling plenum 26 of a housing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clean room, and more particularly, to a bio-clean room related to hospital medical treatment, food, and a clean room such as electronics industry and precision machinery industry.

[0002]

2. Description of the Related Art A conventional clean room 1 of this type is shown in FIG.
As shown in FIG. 5 and FIG. 5, an air conditioner 4 is provided in the machine room 3 adjacent to the clean zone 2.
An outside air introduction duct 6 for introducing fresh outside air into the air conditioner 4 is connected to the. And the clean zone 2
An air supply duct 8 is provided in the ceiling space 7 of the air passage in communication with the air supply side of the air-conditioning air 4, and a branched tip portion of the air supply duct 8 is connected to the clean zone 2 via a HEPA filter unit 9. It is connected to each outlet 12 formed on the ceiling of the. Further, a return air duct 10 is provided in the ceiling space 7 so as to communicate with the intake side of the air-conditioning air 4, and a branched tip end portion of the return air duct 10 is in the clean zone 2.
Are connected to the respective suction ports 11, 11 ... As a result, the conditioned air from the air conditioner 4 passes through the air supply duct 8 and is cleaned by the HEPA filter unit 9 and blown into the clean zone 2. Then, the clean air blown into the clean zone 2 air-conditions the clean zone 2 and is sucked into the suction ports 11, 11 ... With dust in the clean zone 2, and returns to the air conditioner 4 through the return air duct 10. By this air circulation, the clean zone 2 can be kept clean.

[0003]

However, in the case of the conventional clean room 1 of this type, as described above, the air supply duct 8 and the return air duct 10 are provided in the ceiling 7 of the clean zone 2.
And the HEPA filter unit 9 are arranged, and especially the air supply duct 8 and the return air duct 10 require a large space in the ceiling space 7. Therefore, the conventional clean room 1
The construction cost of the building is high, and there is a drawback that the clean room 1 cannot be built in the existing building where the space above the ceiling 7 is small. Furthermore, when the clean room 1 is expanded, in addition to the capacity enhancement of the air conditioner 4 and the extension work of the duct system is required, there is a problem that the cost for remodeling is high and the construction period is long.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a clean room which can be constructed without requiring a large duct space behind the ceiling of the clean zone and in which facilities can be easily expanded. To do.

[0005]

In order to achieve the above-mentioned object, the present invention provides a clean room in which clean air is blown from above the ceiling above the clean zone to the clean zone. A plurality of package air conditioners, each of which is composed of a mixing chamber for mixing with the air of the mixing chamber and a fan for sending out the air from the mixing chamber toward the heat exchanger and the HEPA filter unit, are installed at predetermined locations on the ceiling, and the mixing chamber is equipped with an outside air The heat exchanger is connected to the heat medium source of the outdoor unit and blows clean air from the HEPA filter unit toward the clean zone.

[0006]

According to the present invention, a plurality of packaged air conditioners each including a mixing chamber, a fan, a heat exchanger, and a HEPA filter unit are provided at predetermined locations on the ceiling above the clean zone, and an outside air introduction duct is connected to the mixing chamber. Then, the heat exchanger is connected to the heat medium source of the outdoor unit. As a result, the air sucked into the mixing chamber from the clean zone is mixed with the air taken in from the outside air introduction duct, and then sent to the heat exchanger and the HEPA filter unit by the fan to be air-conditioned and cleaned. After that, it is blown out to the clean zone. That is, according to the clean room of the present invention, the clean room can be constructed even if the supply duct and the return air duct found in the conventional clean room are omitted. Therefore, it is not necessary to take up a large space for arranging ducts behind the ceiling,
When building a clean room, the floor height of the building can be lowered and the clean room can be built even in an existing building with a narrow ceiling.

Further, the packaged air conditioner is a unit type that independently performs the cleaning function of the clean zone. Thus, when expanding the clean room, it is only necessary to add a package air conditioner to the back of the ceiling and attach an outside air introducing duct for introducing outside air to the package air conditioner. Therefore, since the remodeling work can be easily performed, the construction period can be significantly shortened.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a clean room 20 according to the present invention will be described in detail below with reference to the accompanying drawings. As shown in FIGS. 1 and 2 of the first embodiment of the clean room 20 of the present invention, eight ceiling-embedded package air conditioners 2 are provided.
2, 22, ... Are arranged in a well-balanced manner in the ceiling 26 of the clean zone 24 as shown in FIG. Incidentally, the package air conditioner 22 has a heat exchanger 38 and an air supply fan 42 built-in, a HEPA filter unit 34 is attached to the air blow side of the package air conditioner 22, and a mixing chamber 28 is installed on the intake side of the package air conditioner 22.
Is a unit type with. Further, an outside air introducing duct 30 is connected to the mixing chamber 28, and is also connected to a suction port 32 of the clean zone 24.

On the other hand, the HEPA filter unit 34 is connected to the air outlet 36 of the clean zone 24. Further, the heat exchanger 38 is connected to each package outdoor unit 40 provided outside the clean room 20 so that the temperature control (heating, cooling) is harmonized. The configuration of the clean room 20 of the present invention is as described above, and the function as the clean room 20 is as follows. That is, the conditioned air supplied from the packaged air conditioner 22 is cleaned by the HEPA filter unit 34, and then the air outlet 36 formed on the ceiling of the clean zone 24.
Is blown into the clean zone from. Clean zone 2
The clean air blown to 4 cleans the clean zone 24 and is sucked into the mixing chamber 28 from the suction port 32 formed in the ceiling of the clean zone 24 together with the fine dust in the clean zone 24. The return air sucked into the mixing chamber 28 is supplied to the outside air introduction duct 3
The mixture is mixed with fresh air sucked into the mixing chamber 28 from 0 and is sent to the temperature / humidity adjusting section 38 by an air supply fan. Then, the temperature and humidity are adjusted by the temperature and humidity adjusting section 38 and sent again to the HEPA filter unit 34.

As described above, according to the clean room 20 of the present invention, the clean room can be constructed without the supply duct and the return air duct found in the conventional clean room 20. Therefore, the air supply duct and the return air duct, which occupy a large space in the attic 26, are not required, and the floor height of the clean room 20 can be lowered, so that the construction cost is low and the existing building with a narrow attic 26 can be constructed. It will be possible.

Further, the packaged air conditioner 22 to which the HEPA filter 34 is attached is a unit type which individually and independently functions to clean the clean zone 24. As a result, when the clean room 20 is expanded, H
The packaged air conditioner 22 to which the EPA filter unit 34 is attached is additionally installed in the ceiling ceiling 26.
It is only necessary to attach the outside air introducing duct 30 for introducing outside air to the package air conditioner 22. Therefore, since the expansion work can be easily performed, the remodeling cost is lower than that of the conventional clean room 20, and the construction period can be significantly shortened.

The mounting interval between the HEPA filter unit and the package air conditioner and the mounting interval between the package air conditioner and the mixing chamber may be widened as necessary. Although the package outdoor unit is provided in each package air conditioner, it may be connected to a plurality of package air conditioners by increasing the capacity of the package outdoor unit. FIG. 3 shows a second embodiment of the present invention. The second embodiment is the first
The package air conditioner and the HEPA filter unit are integrated in a modification of the above embodiment, and the same members as those in the first embodiment are designated by the same reference numerals. In the second embodiment, the fresh air sucked into the mixing chamber 28 from the outside air introduction duct 30 is mixed with the return air from the clean zone 24 sucked from the suction port 32. Then, the air cooled or heated by the heat exchanger 44 and temperature-controlled is cleaned by the blower 42 by the HEPA filter 34, and then,
The blowout louver 46 blows off to the clean zone 24. The air blown out air-conditions the clean zone 24, and the suction port 3 again together with the dust in the clean zone 24.
Inhaled from 2.

Also in the case of the second embodiment, since the supply duct and the return air duct found in the conventional clean room are not required, the same effect as that of the first embodiment can be obtained. still,
It is desirable that the outlet be a variable louver so that the outlet airflow can be changed over a wide range.

[0014]

As described above, according to the clean room of the present invention, the supply duct and the return air duct found in the conventional clean room are unnecessary. Therefore, since the floor height of the clean room can be lowered, the construction cost can be reduced, and it is possible to construct the existing building with a narrow ceiling.

Further, the packaged air conditioner equipped with the HEPA fill is a unit type which independently performs the cleaning function of the clean zone. This allows
When expanding the clean room, the duct system work only needs the outside air introduction duct to introduce the outside air into the package air conditioner, and the package air conditioners equipped with the HEPA filter unit are placed in the ceiling above the clean zone. Just set it up. Therefore, since the expansion work can be easily performed, the remodeling cost is lower than that of the conventional clean zone, and the construction period can be significantly shortened.

[Brief description of drawings]

FIG. 1 is a plan view of a first embodiment of a clean room according to the present invention.

FIG. 2 is a side view of the first embodiment of the clean room according to the present invention.

FIG. 3 is an enlarged view of a main part of a second embodiment of a clean room according to the present invention.

FIG. 4 is a plan view of the conventional clean room seen from the ceiling side.

[Fig. 5] Side view of a conventional clean room

[Explanation of symbols]

 20 ... Clean room 22 ... Package air conditioner 24 ... Clean zone 26 ... Attic 30 ... Outside air introduction duct 34 ... HEPA filter unit 40 ... Outdoor unit

Claims (1)

[Claims] 1. In a clean room in which clean air is blown into the clean zone from above the ceiling above the clean zone, a mixing chamber for mixing air outside the clean room with air in the clean zone, and heating the air from the mixing chamber. A plurality of packaged air conditioners, each of which is composed of a fan for sending out to an exchanger and a HEPA filter unit, are installed at a predetermined location on the ceiling, and an external air introduction duct is connected to the mixing chamber, and the heat exchanger serves as a heat source for an outdoor unit. A clean room which is in communication with a medium source and blows clean air from the HEPA filter unit toward a clean zone.