JP2008151482A - Ventilation system for building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ventilation system capable of inexpensively or effectively ventilating a building in atmospheric environment having adverse effect on people or equipment. <P>SOLUTION: The ventilation system comprises a cable duct 30 storing wiring and pipes for supplying electricity, water, gas, and the like to the building 10 and connected to the building 10, or a communicating passage 80 communicating with the building 10; an intake port 41 provided in an area of excellent atmospheric environment and connected to the cable duct 30 or the communicating passage 80; an air blower 43 supplying ventilation air sucked from the intake port 41, to the building 10 through the cable duct 30 or the communicating passage 80; and a ventilation port or a ventilation fan 45 provided in the building 10. When ventilating the building, air is supplied so that the internal pressure of the building exceeds external atmospheric pressure. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a ventilation system for a building in an area under an atmospheric environment that adversely affects people or equipment. In the present invention, an atmospheric environment that adversely affects humans or equipment includes, for example, an atmosphere containing salt, an atmosphere containing dust, an atmosphere under high temperature, an atmosphere containing pollutants, and the like. An air environment that does not contain dust, pollutants, and does not adversely affect people or equipment, not an air environment under high temperature.

  In houses, offices, factories, etc., indoor air is gradually polluted by carbon dioxide, dust, furniture, or volatile components generated by machinery, etc., so use ventilation openings, ventilation fans, air conditioners, etc. Fresh air outside the building is taken into the room and ventilated. When the atmosphere around the building is clean, the inside of the building may be replaced with the outside atmosphere. However, when the atmosphere around the building is polluted, mere ventilation does not make sense. For some pollutants such as sulfur oxides and nitrogen oxides, the emission at the source is regulated by law, but the salinity along the coast or the sulfur oxide in hot springs is the source. It is difficult to hold with.

  In areas where the air is polluted, obstacles such as corrosion, failure, and reduced life of equipment inside the building may become a major problem. For example, a building near the coast contains salt in the atmosphere, and ventilation in such an atmosphere will cause equipment corrosion, failure, or reduced life. As a method for ventilating a building in such an environment, there is a method in which the air to be taken in is washed and filtered to remove contaminants and then introduced into the room. However, this method requires maintenance such as replacement and cleaning of the filter medium, and is a very expensive system in terms of cost. For example, in a semiconductor manufacturing factory or a building manufacturing a precision machine that needs to remove almost 100% of contaminants, a clean room is provided, but this equipment is very expensive.

The following technologies have also been proposed for building ventilation systems. After passing outdoor air through a pipe buried in the ground and exchanging heat with the cold and heat in the ground, and after exchanging heat with the cold and hot in the ground, for example, a ventilation system that takes in indoors (see Patent Document 1, for example) Furthermore, a ventilation system aiming at energy saving and health promotion effect has been proposed, such as a ventilation system (see, for example, Patent Document 2) that is brought into contact with aromatic wood and then given negative ions and then taken indoors.
JP-A-11-94297 JP 2000-213774 A

  When the atmospheric environment is good and the surrounding air is clean, a ventilation system using a ventilation fan or a ventilation port can provide a ventilation effect that is satisfactory in terms of cost and performance. If you are in an atmospheric environment that adversely affects people or equipment and the surrounding air is polluted, you can adopt a ventilation system that introduces filtered and cleaned air into the room. As represented by the clean room, there is a drawback of high cost. Even if the atmosphere is not polluted, ventilation in the instrument room, etc. in a high-temperature environment such as the vicinity of the blast furnace is also a problem. Currently, a ventilation system that can effectively and inexpensively ventilate buildings in an atmospheric environment that adversely affects people or equipment, including the ventilation system described in Patent Document 1 or Patent Document 2, has been developed. Not.

  The objective of this invention is providing the ventilation system which can perform the ventilation of the building in the atmospheric environment which has a bad influence on a person or an apparatus cheaply and effectively. Another object is to provide a building ventilation system that can be easily applied to existing buildings.

  The building ventilation system of the present invention is a building ventilation system in an atmospheric environment that adversely affects people or equipment, and stores wiring, piping for supplying electricity, water, gas, etc. to the building, and the building. The cable duct to be connected or the communication passage that communicates with the building, the air inlet that is provided in an area having a good atmospheric environment and is connected to the cable duct or the communication passage, and the ventilation air sucked from the air inlet A fan sent to the building through a cable duct or the communication passage, and a ventilation opening or a ventilation fan provided in the building, and sends the building so that the internal pressure of the building exceeds the external atmospheric pressure when the building is ventilated. It is characterized by care.

  The ventilation system according to the present invention is provided in a building through a wiring that supplies air, water, gas, etc. to a building in a good air environment, a cable duct that stores piping and connects to the building, or a communication passage that communicates with the building. Because the air is sent to the building, it is possible to ventilate the building at low cost. Normally, cable ducts and connecting passages are incidental facilities in buildings, and when the connecting passage is underground, a blower is attached to prevent oxygen deficiency. The present invention can be implemented only with this. Therefore, compared with a clean room system that filters and cleans the atmosphere, the cost of equipment and maintenance can be greatly reduced. Furthermore, it can be easily applied to existing buildings. In addition, when ventilating a building, air is sent so that the internal pressure of the building exceeds the external atmospheric pressure. Ventilation can be performed effectively without intrusion.

  Further, the building ventilation system of the present invention has the above-described configuration, and the building is a building that houses equipment, and a compartment that houses equipment that is easily affected by the atmospheric environment and equipment that is not easily affected by the atmospheric environment. A partition wall provided in the building that is separated into the housed compartment, and a ventilation port provided in the partition wall for communicating both compartments, and the air supply from the blower first affects the influence of the atmospheric environment It flows into the compartment containing the sensitive devices, then flows into the compartment containing the devices that are not easily affected by the atmospheric environment through the ventilation openings, and is finally discharged outside the building through the ventilation openings or the ventilation fans. It is characterized by.

  Further, according to the present invention, the building is a building that houses equipment, and the building is separated into a compartment that contains equipment that is easily affected by the atmospheric environment and a compartment that contains equipment that is not easily affected by the atmospheric environment. Including a partition wall and a ventilation port provided in the partition wall for communicating both compartments, and the air supply from the blower flows into the compartment containing the device that is susceptible to the atmospheric environment first, Next, it flows into the compartment containing the devices that are not easily affected by the atmospheric environment through the vents, and finally released to the outside of the building through the ventilation ports or fans. can do. Even if the air in a compartment containing equipment that is not easily affected by the atmospheric environment is contaminated, the air is discharged directly to the outside without passing through the compartment containing equipment that is susceptible to the atmospheric environment. Therefore, it is possible to sufficiently protect equipment that is easily affected by the atmospheric environment.

  Further, the building ventilation system according to the present invention has a sealing means for preventing the atmosphere from leaking into the cable duct or the communication passage from a portion other than the air inlet, in the cable duct or the communication passage, in addition to the above-described configuration. It is characterized by providing.

  In addition, according to the present invention, since the sealing means for preventing the atmosphere from leaking into the cable duct or the communication passage from a portion other than the air inlet, the atmosphere that adversely affects humans or equipment leaks and is cleaned. The atmosphere is not polluted and the atmospheric temperature does not rise significantly. For example, even if there is a gap in the connection part of the cable duct or the connection passage branches off and is connected to multiple buildings, the cable duct or connection passage leading to the building other than the object to be ventilated is sealed, so it is not the intake port Inhalation of air that adversely affects people or equipment from any part.

  The building ventilation system of the present invention is provided in an area where the air environment is good, with wiring for supplying electricity, water, gas, etc. to the building, cable duct for storing piping and connecting to the building, or communication passage connecting with the building. An air inlet connected to the cable duct or the communication passage, a blower for sending ventilation air sucked from the air inlet to the building through the cable duct or the communication passage, and a ventilation port or a ventilation fan provided in the building. When the air is ventilated, air is supplied so that the internal pressure of the building exceeds the external atmospheric pressure, so that the building in an atmospheric environment that adversely affects people or equipment can be ventilated at low cost and effectively. It can also be easily applied to existing buildings.

  FIG. 1 is a diagram showing a schematic configuration of a building ventilation system 1 as a first embodiment of the present invention. A building ventilation system 1 shown in the first embodiment is a ventilation system that sends clean air to a water discharge channel monitor building 10 for analyzing and monitoring the water quality of waste water discharged from a power plant, and ventilates the inside of the building. A cable duct 30 for supplying utilities such as water and electricity to the discharge channel monitor building 10, an intake port 41 for sucking clean air, a blower 43 for sending clean air into the discharge channel monitor building 10, and air inside the building for outdoor use A ventilation fan 45 is mainly configured to exhaust the air.

  In the power plant, the turbine is driven by steam, and power is generated by a generator connected to the turbine. The steam whose temperature and pressure are reduced by driving the turbine is cooled by seawater taken from the intake channel and becomes condensed water. On the other hand, the seawater whose temperature is increased by cooling the steam exhausted from the turbine is discharged into the sea through the underground water discharge channel 51. The discharge channel monitor building 10 is a one-story building designed to measure and monitor the quality of the discharged seawater. It is constructed near the exit of the discharge channel 51, that is, along the coastline, in order to collect and analyze the water just before the discharge. The equipment and measuring instruments are stored in the building. For this reason, the atmosphere around the discharge channel monitor building 10 contains salt.

  The interior of the water discharge channel monitor building 10 is divided into two sections by a partition wall 20, a section close to the coast is used as the sampling chamber 12, and a section far from the coast is used as the electric panel room 13. In the sampling chamber 12, a sampling pump 14, an analysis device 21, a drain pit 16, and a drain pipe 17 are installed, and seawater is continuously sucked up from the discharge channel 51 through the sampling pipe 15 by the sampling pump 14. After analyzing chlorine and the like, it returns to the sea through the drainage pit 16 and drainage pipe 17. On the other hand, in the electrical panel room 13, a power panel 23, a water quality monitor 24, a data recording transmitter 25, and a control panel 26 are installed. The water quality monitor 24 is connected to a sensor 22 inserted directly into the water discharge channel 51, and continuously measures temperature and the like, and these data are sent to the central control in the power plant main building 50 via the data recording transmitter 25. Sent to the room. As described above, the sampling chamber 12 is provided with devices that are relatively resistant to salt, and the electrical panel chamber 13 is provided with devices that are weak against salt.

  The partition wall 20 is used to divide the water discharge channel monitor building 10 into a sampling chamber 12 and an electric panel chamber 13, and a small opening 19 is provided in the partition wall 20. The opening 19 serves as a ventilation opening when the sampling chamber 12 and the electric panel chamber 13 are communicated to ventilate the water discharge channel monitor building 10. Although the size and attachment position of the opening 19 are not particularly limited, when ventilating the inside of the water discharge channel monitor building 10, there is no dead space in the room so that the entire room can be efficiently ventilated. It is desirable to determine in consideration of the position of the fan 45.

  The cable duct 30 is connected to a section closer to the power plant main building 50 among the two sections in the discharge channel monitor building 10, that is, the electric panel room 13. These utilities are all supplied from the power plant main building 50 through electrical wiring and water pipes housed in the cable duct 30. A cable 35 for transmitting data to be transmitted from the discharge channel monitor building 10 to the central control room in the power plant main building 50 is also housed in the cable duct 30. The cable duct 30 is embedded in the ground.

Further, the cable duct 30 includes an intake duct 42 having an intake port 41 in the vicinity of the power plant main building 50.
Connect with. The intake duct 42 is for taking in ventilation air to be sent to the discharge channel monitor building 10, and the air taken in from the intake port 41 is sent to the discharge channel monitor building 10. For this reason, the intake port 41 needs to be in a place where clean air that does not contain salt or the like can be taken in. In the present embodiment, the intake port 41 is provided on the immediate side of the power plant main building 50. The power plant main building 50 plays an important role in managing and operating the power plant, and is constructed at a location away from the sea so as not to be affected by salt damage and waves. Therefore, in normal weather, salt damage around the power plant main building 50 is almost negligible. The intake port 41 is not limited to a specific location as long as it is in a place where clean air can be taken in. However, by providing the intake duct 42 on the side surface of the power plant main building 50, the distance from the cable duct 30 can be increased. It is close and easy to install, resulting in low cost.

  The cable duct 30 has an unnecessary opening sealed with a sealing means 33 such as a putty so that ambient air does not enter. The sealing means 33 is exemplified by a putty, an adhesive tape, a door, and the like. Further, the sealing means 33 is used to fill a gap in the through portion of the cable 35 and to connect to a building outside the discharge channel monitor ridge 10 to be ventilated. It is preferable to prevent the surrounding air from entering the discharge channel monitor ridge 10 or the cable duct 30 by filling the gap.

  The blower 43 is for sending clean air taken in from the air inlet 41 to the water discharge channel monitor building 10 through the cable duct 30, and is connected to the connection portion between the cable duct 30 and the electric panel room 13. It is attached. Although the performance of the blower 43 is not particularly limited, it is necessary to be able to supply air necessary for sufficiently ventilating the inside of the water discharge channel monitor building 10. The length of the flow path from the intake port 41 to the blower 43 is from several tens of meters to several hundreds of meters in some cases. Furthermore, since the cross section of the cable duct 30 is a circle or a quadrangle having a diameter or length of several hundred millimeters, and wiring and piping are housed inside, the air flow rate and the discharge pressure are controlled in consideration of these points. It is necessary to decide. Further, when the exhaust fan 45 is provided in the water discharge monitor building 10 as shown in the present embodiment, the air flow rate of the blower 43 exceeds the air flow rate of the ventilating fan 45, so Set so that the pressure is higher than the outside air. By setting in this way, it is possible to prevent the atmosphere containing salt around the discharge channel monitor building 10 from leaking into the discharge channel monitor building 10.

  The ventilation fan 45 discharges indoor air to the outdoors and is installed in the sampling chamber 12 on the sea side. As the ventilation fan 45, a general ventilation fan used in a normal building can be used. Although the performance of the ventilation fan 45 is not limited to that of a specific performance like the blower 43, it is necessary to set the ventilation fan 45 to be lower than the blower 43. In addition, in consideration of the position of the opening 19 provided in the partition wall 20 which is a ventilation opening, it is desirable to provide it at a position where the room can be efficiently ventilated.

  The building ventilation system 1 of the present invention having the above configuration is ventilated in the following manner. First, clean air around the power plant main building 50 is sucked from the air inlet 41 and is sent to the electric panel room 13 by the blower 43 through the cable duct 30. Clean air from the blower 43 first enters the electrical panel room 13 and ventilates the electrical panel room 13. The clean air sent into the electrical panel room 13 enters the sampling room 12 through the opening 19 provided in the partition wall 20, ventilates the sampling room 12, and is finally discharged outdoors by the ventilation fan 45. The

  The sampling chamber 12 communicates with the outside air through the drain pipe 17, and air containing salty water may enter. Further, since the analyzed seawater is discharged from the analyzer 21 to the drain pit 16, the indoor air is likely to contain salt. For this reason, the sampling chamber 12 is provided with a device that is relatively resistant to salt. On the other hand, since the electric board room 13 does not have a portion that directly communicates with the atmosphere along the coast, sea breeze hardly enters the electric board room 13. For this reason, in the electric panel room 13, devices that are vulnerable to salt are installed. However, since the sampling chamber 12 and the electric board chamber 13 communicate with each other through the opening 19 and further open by opening a door (not shown), there is a possibility that air containing salty air enters the electric board chamber 13. .

  In this respect, the ventilation system 1 first replaces the electrical panel room 13 with clean air, and then replaces the sampling room 12 with air discharged from the electrical panel room 13, so that the sampling room 12 is temporarily Even if it is contaminated, the electric panel room 13 is not contaminated. Moreover, since the air volume of the blower 43 is set so as to be larger than the air volume of the ventilation fan 45, the inside of the water discharge channel monitor building 10 is in a pressurized state, and outside air including salt enters the room through the gap between the buildings. There is no. On the contrary, since the indoor air is pushed out through the drain pipe 17, the gap between the buildings, etc., the probability that the sea breeze enters during bad weather can be greatly reduced. Furthermore, since the unnecessary opening of the cable duct 30 is sealed with a putty, there is no possibility that the surrounding atmosphere leaks. As a result, the inside of the building can be ventilated with air that does not contain salt, and the life of electrical equipment can be greatly extended.

  As described above, the building ventilation system 1 according to the present invention has a great feature in that the cable duct 30 is used as an air supply passage. By adopting such a configuration, the inside of the building can be ventilated at low cost. it can. In addition, when the building is ventilated, air is sent so that the internal pressure of the building exceeds the external atmospheric pressure. Ventilation can be performed effectively without intrusion. In the first embodiment, the example of the cable duct 30 buried underground is shown, but it goes without saying that the cable duct installed on the ground can be used. However, if the underground cable duct 30 is used, since the underground temperature is relatively stable throughout the year, it is possible to obtain a cooling effect in the summer and a heating effect in the winter. An incidental effect that can reduce the heating and cooling costs can also be obtained. In particular, when the underground communication passage shown in the second embodiment to be described later is used as the air supply passage, the effect is great because the heat capacity is large. Furthermore, although the example which uses the ventilation fan 45 was shown in 1st Embodiment, it may replace with the ventilation fan 45 and may provide a ventilation opening. At this time as well, by supplying air so that the pressure in the building exceeds the ambient atmospheric pressure, it is possible to prevent the intrusion of air containing salt.

  FIG. 2 is a diagram showing a schematic configuration of the ventilation system 60 of the water discharge channel monitoring building 70 according to the second embodiment of the present invention. The same members as those in FIG. 1 are denoted by the same reference numerals, detailed description thereof will be omitted, and differences will be mainly described. The ventilation system 60 shown in the second embodiment has almost the same basic configuration as the ventilation system 1 shown in the first embodiment, and the ventilation mechanism is basically the same. However, the main difference is that the structure of the discharge channel monitor building 70, which is a building, and the air supply flow path are replaced with the cable duct 30 and the communication passage 80 is used.

  The spillway monitor building 70 shown in the second embodiment is similar to the spillway monitor building shown in the first embodiment, and is a building that houses equipment and measuring instruments for measuring and monitoring the quality of seawater discharged from the power plant. It is a two-story building with a basement floor located near the coast and a ground floor. The first basement floor is the sampling room 72 and the first floor is the electric panel room 73, and the installed equipment is the same as the drainage channel monitor building 10 shown in the first embodiment. The discharge channel monitor building 70 shown in the second embodiment also has a cable duct 30 that communicates with the power plant main building 50 that stores the electric wires and pipes, like the discharge channel monitor building 10 shown in the first embodiment. In addition, there is a communication passage 80 through which power station staff can communicate between the discharge channel monitor building 70 and the power plant main building 50. In the ventilation system 60 of the water discharge channel monitor building 70 shown in the second embodiment, clean air is supplied using this communication passage 80.

  The communication passage 80 is provided in the basement so that it can safely come and go to the power plant main building 50 even in bad weather such as a storm, and one end is the sampling chamber 72 of the water discharge channel monitoring building 70 and the other end is the power plant main building 50. linked. Doors 81 and 82 are provided at a connection portion between the communication passage 80 and the sampling chamber 72 of the discharge channel monitor building 70 and a connection portion between the communication passage 80 and the power plant main building 50. The doors 81 and 82 are normally closed and are opened when a staff member uses the communication passage 80. In addition, the communication passage 80 communicates with the intake duct 42 provided on the immediate side of the power plant main building 50 and is a connection portion with the sampling chamber 72 of the water discharge channel monitoring building 70, and does not interfere with the traffic of the staff. There is a blower 43 in place. Further, an air supply duct 75 for sending the supplied air to the electric panel room 73 is provided at the discharge portion of the blower 43 so as to penetrate the floor 76 at the end of the building. The cable duct 30 is provided in the ceiling portion of the communication passage 80.

  The spillway monitoring ridge 70 is one floor above ground and one floor above ground. The ground and the basement are separated by a floor 76, and the ground and the basement are connected by a staircase 77. The staircase 77 is provided at an end facing the air supply duct 75, is not provided with a door, and the first floor and the first basement are always in communication. Further, an exhaust duct 78 for discharging the air on the first basement floor to the outside is provided in the vicinity of the air supply duct 75 in the water discharge channel monitor building 70. One end of the exhaust duct 78 is attached by opening the wall surface of the electric board chamber 73, and a ventilation fan 45 is attached to a connection portion with the wall surface of the electric board chamber 73. The relationship between the performance of the blower 43 and the ventilation fan 45 and the air volume of the blower 43 and the ventilation fan 45 are the same as in the first embodiment.

  The building ventilation system 60 of the present invention configured as described above is ventilated in the following manner. First, clean air around the power plant main building 50 is sucked from the intake port 41 and is sent to the electrical board room 73 on the first floor above the ground via the air supply duct 75 by the blower 43 through the communication passage 80. Clean air from the blower 43 first enters the electric board room 73 and ventilates the electric board room 73. The clean air sent into the electric board room 73 enters the sampling room 72 on the first basement through the stairs 77, ventilates the sampling room 72, and is finally discharged to the outside through the exhaust duct 78 and the ventilation fan 45. At this time, since the air supply duct 75, the staircase 77, and the exhaust duct 78 are alternately arranged in the vicinity of the end of the building, the entire building can be effectively ventilated without causing a dead space in the building.

  The effect of the building ventilation system 60 shown in the second embodiment is basically the same as the effect of the building ventilation system 1 shown in the first embodiment. In the second embodiment, an example in which the staircase 77 is used as a ventilation opening is shown. However, when doors are provided at the entrance and exit of the staircase 77, the ventilation is performed as shown in the first embodiment. Needless to say, the mouth 19 may be provided. In the second embodiment, an example in which the communication passage 80 is used as an air supply channel has been described. However, as in the first embodiment, the cable duct 30 can naturally be used as an air supply channel. However, when the communication passage 80 is provided from the following points, it is preferable to use the communication passage 80 as an air supply passage.

  Since the communication passage 80 where the staff come and go needs to ventilate the inside of the communication passage 80 from the viewpoint of oxygen deficiency prevention, the communication passage 80 is used as an air supply passage for ventilation of the building. Ventilation and ventilation in the building can be performed at once. In addition, the cable duct 30 naturally has a limited amount of air supply when there are many wires and pipes in the duct, or when the diameter of the cable duct is small, but the connecting passage 80 has a large cross-sectional area. There is no limit.

  In 1st, 2nd embodiment, although the air blower 43 showed the example installed in the connection part of the water discharge channel monitor buildings 10 and 70, the cable duct 30, or the communication channel | path 80, the air blower 43 is connected from the inlet 41. As long as it is between the connection portion between the cable duct 30 and the discharge channel monitor building 10 or the connection portion between the communication passage 80 and the discharge channel monitor building 70, it may be disposed at any position. In addition, in the case where the ventilation resistance is extremely large and the generally available blower 43 cannot supply the necessary air volume, a plurality of blowers 43 may be arranged along the flow path. When remodeling existing equipment, considering the installation space of the blower 43 and the ease of maintenance, the blower 43 is installed at the inlet of the inlet 41, the water discharge monitor building 10 and the cable duct 30 or the water discharge monitor building 70. And the connecting portion between the communication passage 80 seems to be realistic.

  In the first and second embodiments, an example in which the cable duct 30 or the communication passage 80 leads only to the power plant main building 50 and the discharge channel monitoring buildings 10 and 70 is shown. In some cases, If the building is in an atmospheric environment containing salt damage, the air containing salt will be sucked in through the cable duct or communication passage connected to the building, so the cable duct or communication passage leading to the building other than the building to be ventilated It is desirable to seal with a putty or door and shut off from the flow path of the ventilation system according to the present invention. By doing so, the blower 43 can suck only clean air through the air inlet 41 and supply it to the water discharge channel monitoring buildings 10 and 70.

  In the first and second embodiments, the embodiment of the present invention as a salt damage prevention measure, that is, the ventilation system of a building in an atmospheric environment containing salt, the present invention is a building in such an environment. It is not limited to, but in an environment contaminated with high-concentration dust, such as a foundry, and in a high-temperature environment, such as the vicinity of a blast furnace, in a polluted air environment It can be applied to ventilation of buildings in an atmospheric environment that adversely affects people or equipment, such as buildings in

It is a figure showing a schematic structure of ventilation system 1 of a building as a 1st embodiment of the present invention. It is a figure which shows schematic structure of the ventilation system 60 of the building as 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,60 Ventilation system of building 10,70 Water discharge monitor building 12,72 Sampling room 13,73 Electric board room 19 Opening part 20 Partition wall 30 Cable duct 33 Sealing means 41 Inlet port 43 Blower 45 Ventilation fan 77 Stairs 80 Connection passage

Claims (3)

A building ventilation system in an atmospheric environment that adversely affects people or equipment,
Wiring for supplying electricity, water, gas, etc. to the building, cable duct for storing piping and connecting to the building, or communication passage communicating with the building;
An air inlet connected to the cable duct or the communication passage provided in an area having a good atmospheric environment;
A blower for sending ventilation air sucked from the air inlet to the building through the cable duct or the communication passage;
A ventilation opening or a ventilation fan provided in the building,
A ventilation system for a building, wherein when the building is ventilated, air is supplied so that an internal pressure of the building exceeds an external atmospheric pressure. The building is a building for storing equipment, and a partition wall provided in the building that is separated into a section that stores equipment that is easily affected by the atmospheric environment and a section that stores equipment that is not easily affected by the atmospheric environment; ,
A ventilation opening provided in the partition wall for communicating both compartments,
The air supply from the blower first flows into a compartment containing a device that is easily affected by the atmospheric environment, and then flows into the compartment containing a device that is not easily affected by the atmospheric environment through the vent, and finally the The building ventilation system according to claim 1, wherein the building ventilation system is discharged outside the building through a ventilation port or the ventilation fan.   The said cable duct or the said communication channel | path is provided with the sealing means which prevents that air | atmosphere leaks in a cable duct or a communication channel | path from parts other than the said inlet port. Building ventilation system.

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