JP2003083578A - Clean room - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a clean room in which an air conditioner, intake / exhaust means, control means and the like are unitized. SOLUTION: The outside air suction-purified by an intake means 2 is adjusted in temperature, humidity and the like by an air conditioner 3 to form a closed chamber 1.
By supplying air into the inside and exhausting the air in the chamber 1 by the exhaust means 8, and controlling the air conditioner 3, the intake and exhaust means 2, 8 and the sterilization means 10 by the dynamic load control means 4,
This is a clean room in which the temperature, humidity, pressure, cleanliness, etc. in the room 1 are maintained at predetermined values, and the air conditioner 3, the suction / exhaust means 2, 8, the sterilization means 10, and the dynamic load control means 4 are unitized, The clean room is completed by installing various units such as the unitized air conditioner 3 into the construction site together with the room 1 so that the clean room is completed. Work period and man-hour required for trial operation can be significantly reduced

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clean room mainly used in hospitals and handling of pathogenic microorganisms.

[0002]

2. Description of the Related Art As a clean room of this type,
For example, the one described in JP-A-6-281238 and the one shown in FIG. 9 are known. The clean room described in the above publication is an air conditioner in which the air in the room is put into a temperature control air conditioner through an inlet, purified by a fine filter unit and then blown out into the room, and a wind provided between the temperature control air conditioner and the fine filter unit. A merging portion of the indoor air intake duct is provided on the downstream side of the road resistance adjusting damper, a first pressure sensor for detecting the outlet pressure is provided on the outlet side of the temperature control air conditioner, and a pressure of the merging portion is provided on the merging portion. Second to detect
A pressure sensor is provided to adjust the opening degree of the air passage resistance adjustment damper so that the pressure detected by these first and second pressure sensors is in a range higher than a predetermined positive pressure, and the rotation speed of the fan of the fine filter unit. Even if the air filter is clogged or the air volume of the fan changes, it is possible to automatically adjust the temperature adjustment capacity and air cleaning capacity due to the air volume decrease. Is configured to prevent.

On the other hand, in the clean room shown in FIG. 9, an outside air purified by an intake means a composed of a filter and an intake fan has its rear room c adjusted in temperature and humidity by an air conditioner b.
The air supplied to the inside of the chamber c is exhausted by the local exhaust fan d. The temperature, humidity and cleanliness (purification degree) in the room c are constantly monitored by the condition monitoring personal computer h, and when the preset temperature and humidity cleanliness deviates from the set values, condition monitoring is performed. A command is sent from the personal computer h to the variable air flow valve e to control the opening and closing of the variable air flow valve e, which causes air to be sent from the air conditioner b into the chamber c through the variable air flow valve e, the damper i and the HEPA filter f. As a result, the temperature, humidity, and cleanliness in the room c are maintained at set values, and at the same time, the air volume required for indoor circulation is secured, and the differential pressure before and after the HEPA filter f is different. It can be detected by a pressure gauge g.

[0004]

However, in the clean room of the above publication or the clean room shown in FIG. 9, the clean room contractor purchases the air conditioner, the blower, the damper, the various sensors, etc. individually based on the design drawings. However, there is a problem in that it requires a long period of time for construction because the construction must be done on site, and that many construction man-hours are required because the construction work on site is complicated. In particular, it takes a lot of time and technical skill to adjust the pressure during the trial run and to adjust the air volume of the damper and blower, so a skilled technician must be sent to the construction site for a long time, which increases costs. There are also problems.

On the other hand, in a clean room used in a hospital or the like, the room is switched between positive pressure (positive pressure) and negative pressure (negative pressure) according to the purpose of use, but in the clean room shown in the above publication and FIG. There is also a problem that switching cannot be done easily. The present invention has been made to improve such conventional problems, and provides a clean room in which an air conditioner, intake and exhaust means, control means, etc. are provided as a unit to reduce the construction period and the number of steps in the construction work. The purpose is.

[0006]

In order to achieve the above-mentioned object, the clean room of the present invention is configured such that the outside air sucked and purified by the intake means is adjusted in temperature, humidity, etc. by an air conditioner, and is supplied to a room having a closed structure, and A clean room that maintains indoor temperature, humidity, pressure, cleanliness, etc. at predetermined values by exhausting indoor air by exhausting means and controlling the air conditioner, intake / exhaust means, and sterilizing means by dynamic load control means. The air conditioner, the air intake / exhaust means, the sterilization means, and the dynamic load control means are unitized and incorporated in the room.

With the above construction, a clean room is completed by bringing together various equipment such as a unitized air conditioner with the room to the construction site and incorporating it into the room. Compared to the case of assembling on site, it can significantly reduce the construction period and the number of man-hours required for construction work, adjustment work, and trial operation, and it does not require much technical skill, so dispatch a technician to the construction site for a long time. Since it is not necessary to carry out adjustment work or trial run, it will be possible to reduce the costs for these. In addition, even if there is a change in specifications, it is possible to respond to changes in specifications simply by changing the settings with dynamic load control means according to the specifications, so there is no need to rewrite from the design drawing, which allows the specifications to be changed before or during construction. Even if such a situation occurs, it is possible to quickly respond.

In order to achieve the above object, the clean room of the present invention is such that the pressure inside the room can be switched to positive pressure or negative pressure by the dynamic load control means.

With the above construction, even when the patient's condition changes, for example, in a clean room used in a hospital or the like, and it is necessary to move from a positive pressure clean room to a negative pressure clean room, the room pressure is changed from positive pressure to negative pressure. Since it is not necessary to transfer the patient by switching to the pressure, nosocomial infections that occur when transferring the patient can be prevented.

To achieve the above object, the clean room of the present invention supplies a part of the air conditioned by an air conditioner to the room through a valve means and a HEPA filter, and at the same time, HEPA
The differential pressure before and after the filter is detected, and the intake amount of the intake means is controlled based on the obtained differential pressure.

With the above structure, even if the HEPA filter is clogged, the intake amount of the intake means is automatically adjusted by the differential pressure across the HEPA filter, so that the room is always maintained at a predetermined air volume and speed. be able to.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail with reference to the drawings shown in FIGS. FIG. 1 is a configuration diagram of a clean room, FIG. 2 is a configuration diagram of a control system for maintaining the inside of the clean room in an optimum state, and FIG. 3 is an operation explanatory diagram. Outside air purified by an intake unit 2 including a filter and an intake fan is supplied to a clean room 1 after being adjusted by an air conditioner 3. The air conditioner 3 adjusts the temperature, humidity, cleanliness, etc. of the outside air purified by the intake means 2 and supplies it to the inside of the room 1, and a part thereof is opened and closed by the dynamic load control means 4. Valve means 5 such as a variable air volume valve or a constant air volume valve, a damper 6, and a HEPA filter 7
Is supplied to the inside of the chamber 1 via the so that the amount of air required for indoor circulation is secured. Further, the chamber 1 is provided with an exhaust means 8 including, for example, two local exhaust fans 8a and 8b, one of the local exhaust means 8a constantly exhausts the air in the chamber 1, and the other local exhaust air. The means 8b is controlled to be turned on and off by the dynamic load control means 4.

On the other hand, the temperature, humidity, pressure and cleanliness inside the chamber 1 are constantly detected by a temperature sensor installed in the chamber 1, a humidity sensor, a pressure sensor and other detecting means (none of which are shown), The differential pressure before and after the HEPA filter 7 is detected by the differential pressure gauge 9 and input to the dynamic load control means 4, respectively, and based on the detected information, the dynamic load control means 4 causes the intake means 2 and the air conditioner 3 to operate. , The intake / exhaust means 7, 8, the valve means 5, the damper 6, etc. are controlled, and when the cleanliness inside the chamber 1 is lower than the set value, the sterilizing means 10 sterilizes the air inside the chamber 1 until the set value is reached. In addition, the intake / exhaust after sterilization is also time-controlled by the dynamic load control means 4. The signal input to and output from the dynamic load control means 4 is monitored by the status monitoring personal computer 12,
At the same time as constantly monitoring the state in the room 1, when there are a plurality of rooms 1, it is possible to monitor and manage each room 1.

Next, the operation of the clean room configured as described above will be described. For the equipment such as the room 1 of the clean room and the air conditioner 3 required for the clean room, models corresponding to the specifications are selected in advance at the design stage, unitized and brought into the construction site, and controlled to control each equipment. Software such as a program necessary for control is also incorporated in the dynamic load control means 4 in advance and carried into the construction site. As a result, at the construction site,
Since a clean room can be constructed by assembling various unitized equipment, the number of man-hours at the construction site can be significantly reduced, and by executing the program incorporated in the dynamic load control means 4 after construction, the air conditioner can be constructed. 3, the adjustment of the valve means 5, the damper 6, the intake and exhaust means 2, 8 and the like are automatically adjusted to preset values, so that adjustments that require technical skills such as pressure adjustment and air flow rate adjustment during test operation can be performed in a short time. And it can be done with high accuracy.

In the case of a clean room used in a hospital or the like, the inside of the room 1 is housed in a positive pressure to prevent invasion of bacteria from the outside and in a negative pressure inside the room 1. In some cases, the bacteria of the patient may be prevented from leaking out of the room 1. In any case, the dynamic load control means 4 can switch the positive pressure and the negative pressure in the room 1, and there are a plurality of clean rooms. When there is a room, positive pressure and negative pressure can be set for each room 1. When the clean room test run is completed as described above, the clean room is ready for use.
To explain, the outside air that has been intake-purified by the intake means 2 is
After the temperature, humidity, pressure, and cleanness have been adjusted by the air conditioner 3 to be preset, the air is supplied into the chamber 1, and the air in the chamber 1 is exhausted by the exhausting means 8 It is maintained at a predetermined temperature, humidity, pressure and cleanliness, and the amount of air required for indoor circulation is secured.

On the other hand, when the temperature and humidity in the room 1 deviate from the set values, the dynamic load control means 4 sends a command to the air conditioner 3 to adjust the temperature and humidity in the room 1 to the set values. When the machine 3 is controlled and the pressure in the chamber 1 and the circulating air volume deviate from the set values, one of the valve means 5 and the intake / exhaust means 8b
Is sent to control the valve means 5 and the local exhaust means 8b so that the pressure in the chamber 1 and the circulating air flow become set values.

Since the amount of intake air into the chamber 1 is determined by the processing capacity of the HEPA filter 7, if the HEPA filter 7 is clogged, the amount of intake air will be insufficient, and the amount of intake air within the chamber 1 will be predetermined. It becomes impossible to secure the pressure and the air volume of
In order to prevent this, the differential pressure before and after the HEPA filter 7 is detected by the differential pressure gauge 9 and input to the dynamic load control means 4. The dynamic load control means 4 receives H from the differential pressure gauge 9.
From the differential pressure across the EPA filter 7, the shortage of the intake air amount into the chamber 1 is calculated, and a command is sent to the intake means 2 based on the calculation result so that the pressure and the air amount in the chamber 1 become set values. Since the intake means 2 is controlled, a predetermined pressure and circulating air volume are always ensured in the chamber 1.

On the other hand, when it is detected that the cleanliness in the room 1 deviates from the set value due to a person moving in and out of the clean room, the dynamic load control means 4 sends a command to the sterilization means 10 to cause the sterilization means. The air in the room 1 is sterilized by 10, and after the sterilization, the intake / exhaust means 2, 8 are time-controlled to maintain the cleanliness inside the room 1 at a predetermined value, and the above control operation is performed by the condition monitoring personal computer 12 Will be constantly monitored, and if an abnormality occurs, the clean room manager will be alerted. As a result, the condition of the clean room can be controlled at all times, and if the condition of the patient housed in the positive pressure clean room deteriorates and there is a risk that bacteria generated by the patient will leak to the outside, By switching the inside of the chamber 1 to the negative pressure by the load control means 4, it is not necessary to move the patient to another clean room.
Nosocomial infections can be prevented.

FIG. 4 shows a modification of the clean room corresponding to the biohazard countermeasure (level 3).
This will be explained next. The same parts as those in the above-mentioned embodiment are designated by the same reference numerals, and the description thereof will be omitted. In the modification shown in FIG. 4, a partitioned room 1a, 1b, 1c constitutes a clean room, and doors 13a, 13b, 13c are openably and closably attached to the entrances and exits of the respective rooms 1a, 1b, 1c. . The outside air taken in by the intake means 2 is supplied to each of the chambers 1a, 1b, 1c through the HEPA filter 7 after the temperature, humidity, cleanliness, etc. are adjusted by the air conditioner 3, 1b, 1c air is another HE
The air is exhausted by the local exhaust means 8a through the PA filter 7a. A safety cabinet 14 is installed in one of the compartments 1a, 1b and 1c, and the air in the compartment 1c is exhausted through the safety cabinet 14 and the exhaust means 8b.
FIG. 5 shows the air flow in the clean room which is configured to be exhausted by the above, and which is a biohazard countermeasure clean room.

On the other hand, FIG. 6 shows a biological clean room, and the constitution until the air is supplied into the chamber 1 is the same as that of the above embodiment and the modified examples shown in FIGS. 4 and 5, A positive pressure damper 15 is used to exhaust the air in the chamber 1. In the case of the modified examples shown in FIGS. 4 and 5, in order to prevent the infectious diseases of the living organisms on the earth and “humans” from being dealt with by the handled molecular organisms, the insides of the chambers 1a, 1b, 1c have negative pressure, Primary isolation is performed by the biological safety cabinet 15, and indoor isolation is performed as a secondary barrier.

Further, in the case of the biological clean room shown in FIGS. 6 and 7, the inside of the chamber 1 is maintained at a positive pressure in order to remove biological and physical influences from outside and outside the area.
Further, FIG. 8 shows an example of a system for switching the inside of the chamber 1 to positive pressure and negative pressure. That is, when the inside of the chamber 1 is maintained at a positive pressure, the bypass circuit 17 circulated from the inside of the chamber 1 to the air conditioner 3 is blocked by the negative pressure damper 18, and the exhaust means 8 and the positive pressure damper 1 are connected.
5, the inside of the chamber 1 is maintained at a positive pressure, and when the inside of the chamber 1 is switched from the positive pressure to the negative pressure, the exhaust means 8 and the positive pressure damper 15 are shut off, and the negative pressure damper 18 is opened. By circulating the air in 1 to the air conditioner 3 via the bypass circuit 17, the inside of the chamber 1 is maintained at a negative pressure. According to this system, a patient who has been conventionally performing a positive pressure clean room, Since it is not necessary to transfer the negative pressure to a clean room, it is possible to prevent hospital infections.

[0022]

As described above in detail, the present invention provides an air conditioner for adjusting the temperature, humidity, etc. of the outside air suctioned and purified by the air intake means by the air conditioner, a dynamic load control means for the intake and exhaust means and the sterilization means. Since it was made into a unit and incorporated into the room, a clean room is completed by bringing in various equipment such as an air conditioner to the construction site together with the room and incorporating it into the room. Compared to the case of assembling at the construction site by site matching, the construction period and man-hours required for construction work, adjustment work, and trial operation can be significantly reduced, and since little technical skill is required, engineers are dispatched to the construction site for a long time. Since it is not necessary to carry out adjustment work or trial run, it will be possible to reduce the cost involved.

In addition, even if there is a change in specifications, it is possible to respond to changes in specifications simply by changing the settings by means of the dynamic load control means in accordance with the specifications, so there is no need to rewrite from the design drawing. Even if the specifications are changed, it is possible to respond promptly, and since the pressure inside the room can be switched to positive pressure or negative pressure by the dynamic load control means, for example, in a clean room used in a hospital or the like. Even if the patient's condition changes like this and it is necessary to move from the positive pressure clean room to the negative pressure clean room, it is not necessary to transfer the patient to the room by changing the pressure from the positive pressure to the negative pressure. Hospital infections that occur during transfer can be prevented.

Further, a part of the air conditioned by the air conditioner is supplied to the room through the valve means and the HEPA filter, the differential pressure before and after the HEPA filter is detected, and the obtained differential pressure is used as a basis. Since the intake amount of the intake means is controlled, even if the HEPA filter is clogged,
Since the amount of intake air of the intake means is automatically adjusted by the differential pressure across the filter, it is possible to always maintain a predetermined air volume and speed in the room.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a clean room according to an embodiment of the present invention.

FIG. 2 is a configuration diagram showing a control system of a clean room according to an embodiment of the present invention.

FIG. 3 is an operation explanatory view of the clean room according to the embodiment of the present invention.

FIG. 4 is a configuration diagram showing a modified example (biohazard countermeasure system) of the clean room according to the embodiment of the present invention.

FIG. 5 is an operation explanatory view showing a modified example (biohazard countermeasure system) of the clean room according to the embodiment of the present invention.

FIG. 6 is a configuration diagram showing a modified example (biological clean room) of the clean room according to the embodiment of the present invention.

FIG. 7 is an operation diagram showing a modified example (biological clean room) of the clean room according to the embodiment of the present invention.

FIG. 8 is an explanatory view of the operation when switching the positive and negative pressures of the clean room according to the embodiment of the present invention.

FIG. 9 is a configuration diagram of a conventional clean room.

[Explanation of symbols]

1 room 2 Intake means 3 air conditioners 4 Dynamic load control means 5 valve means 7 HEPA filter 8 exhaust means 10 Sterilization means

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kazutoshi Kogure             23-2, 1-chome, Kandasuda-cho, Chiyoda-ku, Tokyo               Hitachi Air Conditioning System Co., Ltd. F term (reference) 3L058 BF09 BG01 BG03 BG04                 3L060 AA08 CC09 EE27

Claims (3)

[Claims] 1. An outside air suction-purified by an intake means is supplied to a room having a closed structure by adjusting a temperature, a humidity, etc. by an air conditioner, and an air exhaust means exhausts the air in the room. A clean room in which the temperature, humidity, pressure, cleanliness, etc. of the room are maintained at predetermined values by controlling the intake and exhaust means and the sterilization means by a dynamic load control means. A clean room characterized in that the means and the dynamic load control means are unitized and incorporated into the room. 2. The clean room according to claim 1, wherein the pressure in the room is switched to positive pressure or negative pressure by the dynamic load control means. 3. A part of the air conditioned by the air conditioner is supplied to the room through a valve means and a HEPA filter, and the differential pressure before and after the HEPA filter is detected,
The clean room according to claim 1 or 2, wherein the intake amount of the intake means is controlled based on the obtained differential pressure.