JPS6347792Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air conditioning system for an airtight room housing precision equipment such as communication equipment.

The following factors can cause failures in unmanned communication equipment rooms:

(1) Dust: Dust contained in the outside air that enters accumulates on the contacts of communication equipment, causing poor contact.

(2) Moisture...Like dust, it causes poor contact and also causes poor insulation of coils, etc.

(3) Temperature: When the temperature exceeds a certain level (generally 40°C or higher), insulating materials such as coils tend to deteriorate.

The purpose of the present invention is to eliminate these three factors that cause failures in communication equipment. As a facility to effectively achieve this purpose, the present invention installs a pressurized air purifying device outside the room and a dehumidifier inside the air-conditioning equipment in an airtight room housing precision equipment. The pressurized air that has passed through the pressurized air purifier is supplied into the room through this dehumidifier, and part or all of this supplied air and indoor air are supplied into the room through an air cooler installed indoors. The present invention provides an air conditioning system for a precision equipment room, characterized in that a slight differential pressure damper for maintaining the pressure at a predetermined pressure is installed on the wall of the room.

To explain in detail according to the drawings, Fig. 1 systematically shows the equipment of the present invention, and Fig. 2 shows a plan view of an embodiment of the communication equipment room in which the equipment of the invention is installed. . In both figures, 1 is an unmanned airtight room that houses communication devices and associated machinery, 2 is a pressurized air purifier, 3 is a dehumidifier, 4 is an air cooler, and 5 is the air cooling device. The outdoor units of container 4 are shown respectively.

The pressurized air cleaning device 2 is a device in which a primary filter 6, a secondary filter 7, and a blower 8 are housed in a casing, and is installed outside the communication equipment room 1. This pressurized air cleaning device 2 removes dust from substantially all of the outside air introduced into the communication equipment room 1, and also forcibly blows air into the communication equipment room 1, which is an airtight room, using a blower 8 to Provides the effect of making the pressure inside the room 1 higher than that outside the room. The primary filter 6 has a dust collection efficiency of, for example, 30 to 35% in the NBS test, and the secondary filter 7 has a dust collection efficiency of, for example, 95% in the NBS test.
%, two-stage dust collection is performed. Blower 8
A plurality of units are installed and operated alternately so that the pressure inside the communication equipment room 1 can be constantly maintained higher than the outside pressure.

The outside air from which dust has been removed by the pressurized air cleaning device 2 passes through a duct 9 and is all supplied to a dehumidifier 3 installed indoors. A blower is also housed within the dehumidifier 3, and a portion of the indoor air is sucked into the dehumidifier 3 along with the outside air from the pressurized air purifier 2. Drain condensed in the dehumidifier 3 is discharged to the outside of the system through a drain pipe 10.

On the other hand, an air cooler 4 is installed independently of the outside air processing system consisting of the pressurized air purifier 2 and the dehumidifier 3.
is installed inside the communication equipment room 1. This air cooler 4 is preferably an air source heat pump type air conditioner. In this case, the air cooler 4 is configured as an indoor unit that includes an evaporator and a blower, and a heat pump is formed by connecting refrigerant piping to an outdoor unit 5 that includes a condenser, a blower, a compressor, and the like. The indoor unit of the air cooler 4 is suspended from the ceiling, and a part or all of the indoor air and the treated outside air from the dehumidifier 3 are sucked into its air intake. For this reason, it is preferable to direct the air supply port from the dehumidifier 3 toward the air intake port of the air cooler 4. In the illustrated example, an air supply duct 11 is attached to the discharge port of the dehumidifier 3, and the free end of the air supply duct 11 is opposed to the air intake of the air cooler 4 with a slight distance, and the air is discharged from the air supply duct 11. The air is sucked into the air cooler 4 together with indoor induced air.
With this configuration, the pressurized air cleaning device 2 and the dehumidifier 3
The outside air that has been dedusted and dehumidified through this process and the indoor air whose temperature has risen due to the heat generated by the operation of the communication equipment are cooled to a predetermined temperature by the air cooler 4 and blown into the room.

Avoid forced exhaust from communication room 1,
Instead of this, a slight differential pressure damper 12 is installed in this communication equipment room 1.
Install it on the wall. This slight differential pressure damper 12 adjusts and discharges the indoor air, which has become under positive pressure due to the outside air that is forcibly introduced into the communication room 1, to the outside, thereby constantly maintaining the pressure inside the room more positive than the outside. Use a product that provides the same effect. As this slight differential pressure damper 12, as schematically shown in FIG. 3, it is preferable to use a chuck damper that opens when a wind pressure of a predetermined level or more is applied. This allows the wing 16, which is rotatably supported on one side at the upper part of the opening 15 of the air passage 14 penetrating the chamber wall 13, to be covered by the opening 15. By attaching a weight 17 to the wing 16 so as to be able to adjust its vertical position, the lifting force (and thus the wind pressure) for pushing up the wing 16 can be adjusted. Therefore, according to this slight differential pressure damper 12, the air flow from the outdoors to the room is blocked, but when the pressure inside the room becomes higher than the outside by a predetermined amount, exhaust is performed, and the room is always kept higher than the outside. Positive pressure can be maintained. By maintaining this positive pressure, outside air is effectively prevented from entering the communication equipment room 1 through the doors and windows.

In this way, according to the equipment of the present invention, the pressurized air purifier 2, dehumidifier 3, and air cooler 4
This can be effectively removed by the slight differential pressure damper 12, and failures due to external factors of the communication device can be avoided.

[Brief explanation of the drawing]

Fig. 1 is a system diagram of the equipment arrangement of the equipment of the present invention, Fig. 2 is a plan view of the arrangement of equipment around a communication room showing an embodiment of the equipment of the invention, and Fig. 3 is a schematic sectional view showing an example of a slight differential pressure damper. It is. 1... Communication equipment room 1, 2... Pressurized air cleaning device,
3... Dehumidifier, 4... Air cooler, 5... Outdoor unit of air cooler, 12... Slight differential pressure damper.

Claims (1)

[Scope of utility model registration request] In air conditioning equipment in an airtight room that houses precision equipment, a pressurized air purifier is installed outside the room and a dehumidifier is installed inside the room, and the pressurized air that has passed through the pressurized air purifier is passed through the dehumidifier. supplying air into the room, and supplying some or all of this air supply and indoor air to the room through an air cooler installed indoors,
An air conditioning system for a precision equipment room, characterized in that a slight differential pressure damper is installed on the wall of the room to maintain the indoor pressure at a predetermined pressure.