JPS60113079A - Negative pressure chamber control equipment - Google Patents

Abstract

PURPOSE:To obtain easy, fine control over the pressure in a negative pressure chamber, which maintains a predetermined negative pressure state, by providing in the negative pressure chamber an sub-system with a negative pressure controlling duct. CONSTITUTION:Negative pressure chambers 10 and 12 are connected to each other by means of a relief valve 32. As the main systems for the negative pressure chambers 10 and 12, an air inlet duct 22 consisting of an air conditioner 14, an air delivery fan 16, a constant airflow valve 26, and filters 20 and 20 is used in addition to an exhaust duct 30 consisting of a constant airflow valve 26, a filter 24, and exhaust fans 28 and 29. However, since it is not easy to control the pressure in the negative pressure chambers 10 and 12 because of plugging or the like in the filters 20 and 24, a negative pressure regulating duct 34 consisting of an air delivery fan 36, a constant airflow valve 38, and a filter 40 is provided. This duct 34 is connected to a by-pass duct 42 to form a sub-system. And the by-pass valve 44 in the by-pass 42 is controlled by a signal that is output from a regulator 46 after comparing the pressure in the negative pressure chamber 12 with the standard pressure.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a positive pressure room control device for controlling a positive pressure room that needs to maintain a predetermined negative pressure state.

[Background technology]

As shown in FIG. 1, a conventional control device controls the temperature, humidity, and pressure of positive pressure chambers 10 and 12.

Air conditioner 4. Air supply fan 16. Constant air volume valve 18. A supply air duct 22 with a supply air filter 20 and an exhaust filter 24
．． Constant air volume valve 26. The configuration included an exhaust duct 30 with an exhaust fan 28°29. The balance between the air supply amount and exhaust amount between the air supply duct 22 and the exhaust duct 30 is set by a constant air flow valve 8.26 to adjust the pressure in the depressurization chamber 10.12.

However, in such a conventional control device, when the positive pressure is a slight differential pressure of about -5 mm f (aQ) with respect to the outside air, this is caused by clogging of the air supply filters 20 and 24 in the duct.

[Purpose of the invention]

The present invention has been made in consideration of the above facts, and an object of the present invention is to provide a pressure relief chamber control device that can easily perform fine adjustment of the pressure in the pressure relief chamber.

[Summary of the invention]

In the depressurization chamber control device according to the present invention, fine adjustment of the depressurization chamber can be easily made by providing a duct for adjusting positive pressure to the depressurization chamber and providing a subsystem connected to a bypass duct from the middle part of the duct. There is.

[Implementation of the Invention] The present embodiment shown in FIG. 2 has depressurization chambers 1o and 1z@ as in the conventional train. The depressurization chambers 10 and 12 are communicated only through the IJ l)-f valve 32.
m H2O.

In this embodiment, as in the conventional example, the air conditioner 14. Air supply fan 1
6. Constant air volume valve 18. Air supply duct 22 with air supply filter 20 and constant air volume valve 26. Exhaust filter 5, filter 24. Exhaust fan 2nd, preliminary exhaust fan '2
- The exhaust duct 30 with 29 is used as the main system,
Furthermore, a subsystem having a positive pressure adjustment duct 34 is used.

A positive pressure regulating duct 34 connects an air supply source to an air supply fan 36. Outside air is supplied to the depressurization chamber 12 via the constant air volume valve 3B and the air supply filter 40. One end of a pi/xis duct 42 is communicated between the supply air filter 40 of the negative pressure adjustment duct 34 and the constant air volume valve 38, and the bypass duct 42 has a pi/zos valve 44 in the middle. and an exhaust filter 2 having an exhaust duct 30 at its lower end.
4 is connected to the upstream side of the exhaust fan 28.

The bypass valve 44 is also controlled by a regulator 46, which can be driven manually or automatically by a differential pressure signal from a differential pressure gauge 48. This differential pressure gauge 48 is adapted to detect the differential pressure between the positive pressure in the depressurization chamber 12 and the atmospheric pressure 50, which is a reference pressure.

Next, the operation of this embodiment will be explained. The pressure and temperature and humidity in the depressurizing chambers 10 and 12 are controlled by the main exhaust system. On the other hand, the subsystem pi-ξsuduct 42
The air corresponding to the differential pressure detected by the differential pressure gauge 48 is supplied to the depressurization chamber 12, and the rest is bypassed from the bypass valve 44 to the exhaust duct 30.

Therefore, the operator may operate the vehicle while observing the instructions from the differential pressure word 148, or automatically by a control means (not shown).
The regulator 46 is controlled to finely adjust the texture of the depressurization chamber 12.

Note that the displacement of the depressurization chamber 10 may be set so that the positive pressure is always large, regardless of the set depressurization (3 mm H2O), and the pressure may be maintained at a predetermined depressurization level by adjusting the relief valve 32.

Although the bypass duct 42 needs to keep the air volume within a range that allows the temperature and humidity control of the air conditioner 14, it is possible to achieve an energy saving effect corresponding to the air volume that will be sent. Furthermore, in the past, the influence of pressure fluctuations in the fine control duct system during test runs was large, and for this reason it was necessary to sacrifice the airtightness of the building to some extent, but this has been resolved by this embodiment.

Furthermore, when a package air conditioner is used as an air conditioner, a variable air volume type that automatically controls the constant air volume valve 18 using a slight differential pressure sensor is inappropriate, but this drawback has been solved in the two embodiments.

In addition, in the present invention, in the case of temperature and pressure control in a small space, a sub-system is branched from a part of the main system, and the structure in which the pipe/ξ duct 42 of the above embodiment is provided independently is abolished, and the intake fan and duct R- This is an appropriate structure when the space is narrow. Furthermore, in self-pressure control of large-scale spaces, even greater energy savings can be achieved by increasing the air volume ratio in the subsystem and using spot air conditioning in the main system.

〔Effect of the invention〕

As explained above, in the positive pressure room control device according to the present invention, the subsystem is used in addition to the main system to control the pressure in the self-pressure room.

[Brief explanation of the drawing]

Figure fJ1 is a system diagram showing a conventional self-pressure chamber control device. FIG. 2 is a system diagram showing the first embodiment 11 of the positive pressure room sterilization device according to the present invention. lO...Self-pressure chamber 12 ・Self-pressure chamber 22 Supply air tact 30 Exhaust tact 34・Positive pressure adjustment duct 42 ・Bypass duct.

Claims (1)

[Claims] +1) A main system including an air supply duct to the positive pressure room and an exhaust duct from the positive pressure room, and a positive pressure adjustment duct to the positive pressure room, and an intermediate part of this duct. From... one system of cores connected to the IPA system, which is regulated by the differential pressure between the positive pressure chamber and the reference pressure, from the system to the positive pressure chamber (2) of the subsystem 1j.
- The negative pressure room control device according to claim 1, wherein the IPA duct is connected to an exhaust duct of the main system. (3) The pi-zostat of the sub-system described in 111■ is characterized in that it is connected downstream of the exhaust duct of the main system: the waste amount valve and the exhaust filter unit, and upstream of the exhaust fan. The negative royal control device according to claim 2. (4) The positive pressure room is divided into a plurality of compartments, each of which has a differential pressure, and the positive pressure adjustment duct of the subsystem has the largest indoor space among the compartmented rooms. The positive pressure room i1r control device according to claim 1, which is connected to a room. (5) The positive pressure room control device according to Patent 1, characterized in that the main system has an air conditioner, and the sub system has an air volume controller, a large tamper, and a supply air filter unit.