JPH0359337B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention aims at making maintenance-free equipment in remote observation stations, communication relay stations, and similar unmanned electrical equipment housing machinery rooms, and improving the lifespan and service life of the equipment. This invention relates to a protective device for an unmanned outdoor electrical and mechanical room.

For example, near the entrance of a highway tunnel that passes through a mountainous area, a machine room is usually constructed for unmanned operation and management of the tunnel's auxiliary equipment.
This will house electrical machinery such as tunnel lighting, exhaust equipment, equipment for unmanned operation and control of fire extinguishing, disaster prevention, and other equipment, as well as remote communication equipment. In addition to these tunnel-related facilities, various observation stations and communication relay stations are installed in remote areas, and some of them are equipped with electrical equipment such as control equipment and communication equipment that are controlled unmanned. Often.
For outdoor unmanned electrical and mechanical rooms (hereinafter sometimes simply referred to as unmanned control rooms) installed in such remote areas, depending on the special geographical conditions of the installation location being in a mountainous area, Condensation tends to form due to rain and temperature changes that are unique to mountains, and this can cause contact failures in indoor electrical and electronic components. In addition, in cases such as the tunnel-related facilities mentioned earlier, SOx and other
In addition to NOx, soot and smoke (HC) generated from diesel cars can enter the room and cause contact corrosion and short circuits due to carbon deposits, which can cause malfunctions that must be avoided. .

Since such an unmanned control room is installed to eliminate manning due to geographical conditions, its failure must be particularly avoided. Therefore, in conventional facilities, maintenance costs are high, and once a failure occurs, it is impossible to take prompt action, and its useful life is also limited. Additionally, since this type of control room is unmanned, air conditioning equipment is not usually installed in this type of control room, and even if it is, it is only used to maintain the environment for maintenance workers. Rather, it was intended for temporary use.

In view of these circumstances, the present invention was made with the aim of making the above-mentioned unmanned control room maintenance-free and improving the service life of the equipment. As shown in the examples, observation stations in remote areas, communication relay stations, and similar unmanned electrical equipment storage machinery rooms (unmanned control rooms) with various electrical equipment installed therein.
An air conditioner 2 is installed in the air conditioner 2, and an air supply route (duct) 3 that supplies air from the air conditioner 2 into the room is controlled in opening degree in conjunction with the detected value of a differential pressure gauge 4 that detects the differential pressure inside and outside the room. A pre-filter 6 and a chemical adsorption filter 7 are installed in the air conditioning equipment 2.
In addition to installing a dehumidifier (cooling coil) 8, the cooling function of this dehumidifier (cooling coil) 8 is
An object of the present invention is to provide an outdoor-installed unmanned electrical equipment room protection device that automatically controls the room based on a detected value of the indoor dew point temperature.

The contents of the apparatus of the present invention will be specifically explained below based on the drawings.

Reference numeral 1 indicates an unmanned control room installed outdoors in a mountainous area as described above, in which electrical equipment such as a controller and a communication device are installed. This unmanned control room 1 has a sealed structure that is isolated from the outside air, and the door opens inward. In the present invention, a special air conditioning equipment 2 is installed for this unmanned control room. First, a control damper 5 is attached to the air supply duct 3 from this air conditioning equipment 2 to the unmanned control room 1. This control damper 5 is an automatic damper whose opening degree can be automatically controlled by an electric signal, and the detection signal of the differential pressure gauge 4 that detects the differential pressure between the inside and outside of the room is used as this control signal. By controlling this control damper 5, the pressure inside the unmanned control room 1 is always slightly higher than the pressure outside the room, but it is maintained at a value that does not exceed a certain constant value, for example, 5 mmAq.

In the air conditioning equipment 2, a pre-filter 6, a chemical adsorption filter 7, a cooling coil 8, and a fan 11 are installed in the order of air flow between the outside air intake port 9 and the air supply port 10. There is a return air suction port 12 between the
2 is connected to the air suction port 13 of the unmanned control room 1 via a return air duct 14. 15 is a damper that controls the amount of return air. Also, on the upstream side of the pre-filter 6 is an outside air damper 1 that controls the amount of outside air taken in.
A rough filter 16 such as a wire mesh or a punching board is provided on the upstream side of the filter 7 to remove large debris that flows in with the outside air.

The chemical adsorption filter 7 is an air filter that chemically adsorbs and removes oxidizing harmful substances such as SOx and NOx from the contacts of equipment. There is. The pre-filter 6 filters out road dust and the previously mentioned HC.
etc. to be removed.

The cooling coil 8 is a dehumidifier consisting of an evaporator that forms a heat pump with the condenser 18, and cools and dehumidifies the air passing therethrough. The start and stop of this dehumidifier is determined by the dew point temperature sensor 2 in the unmanned control room 1.
Automatically controlled by an instruction value of 0. Although FIG. 1 shows an example of a cooling coil 8 that cools and dehumidifies as a dehumidifier, a dry dehumidifier consisting of a rotating rotor impregnated with a moisture absorbent may be used instead. Automatically controls its start and stop based on the indicated indoor dew point value.

With the device of the present invention having the above configuration, the room pressure does not exceed a certain value by controlling the amount of air supplied from the air conditioner 2 or the amount of air blown by the differential pressure gauge 4 and the control damper 5 that follows it. Pressurization can be controlled to
This pressurization control automatically prevents soot, smoke, high dew point air, and air containing SOx and NOx from entering the room. Then, the air supply used for pressurization control is subjected to dust removal and chemical adsorption treatment for harmful substances in the air conditioning equipment 2, and is also automatically dehumidified to maintain a humidity that does not cause condensation on indoor equipment. Become. Therefore, it is possible to effectively avoid condensation in unmanned control rooms, which has conventionally caused contact failures and malfunctions in control equipment and communication equipment.
It also prevents the intrusion of oxidizing substances and carbon-based substances, which can cause contact failures and malfunctions. By controlling the opening degree of the control damper 5, even if pressure loss and changes over time occur due to clogging in the prefilter 6 and chemical adsorption filter 7, this is always compensated for by the control damper 5. Maintenance effort can be saved.

In addition, the indicated values a and b of the room temperature, humidity, dew point temperature, etc., the indicated value of the controlled room pressure, the pressure loss value (differential pressure loss Pi) of the prefilter 6 and chemical adsorption filter 7, and the failure signal c of the fan 11 , the dehumidifier failure signal d, and the damper control signal can be teleported to a nearby manned management facility through the transmitter 21, thereby enabling remote management of the device of the present invention.

[Brief explanation of drawings]

FIG. 1 is an equipment layout system diagram of the outdoor-installed unmanned electrical machine room protection device of the present invention. 1... Unmanned control room, 2... Air conditioning equipment, 3... Air supply duct, 4... Differential pressure gauge, 5... Control damper, 6... Prefilter, 7... Chemical adsorption filter, 8... Dehumidifier ( cooling coil), 9... outside air intake, 10... fan, 20... dew point detector.

Claims (1)

[Claims] 1 An air conditioning system 2 is installed in a machine room 1 for storing various types of electrical equipment in remote areas such as observation stations, communication relay stations, and similar unmanned electrical equipment, and air is supplied from this air conditioning system 2 into the room. A control damper 5 whose opening degree is controlled in conjunction with the detection value of a differential pressure gauge 4 that detects the differential pressure between the inside and outside of the room is installed in the air path 3, and a prefilter 6 and a chemical adsorption filter 7 are installed in the air conditioning equipment 2. and an outdoor unmanned electric machine room protection device in which a dehumidifier 8 is installed and the dehumidification function of the dehumidifier 8 is automatically controlled based on the detected value of the indoor dew point temperature.