JP7337459B2 - How to repair air conditioning equipment - Google Patents

Description

The present invention provides an air conditioning facility that delivers cool air or warm air sent out from an air conditioner into a target space from an air control port provided in a duct extending from the delivery side of the air conditioner. The present invention relates to a method for repairing an air conditioning system for repair work such as new installation and new installation of a damper inside a duct.

In general, air conditioners installed in structures such as buildings send cold air and warm air sent out from the air conditioner through a duct connected to the sending side of the air conditioner and from an air control port provided in the duct. It is sent out to a space inside the building (hereinafter referred to as an indoor facility).

By the way, unlike office buildings where the internal heat load drops sharply at night and on holidays, in the case of a 24-hour production factory or a computer center that operates 24 hours a day, the internal heat load of indoor facilities is reduced throughout the day. It often occurs. In the case of the air conditioning equipment in the case of the office building mentioned above, for example, when performing repair work such as replacing ducts or installing new ducts and dampers, repair work should be carried out during hours when indoor facilities are rarely used, such as nights and holidays. The band is forced to close and take advantage of that time. However, in an indoor facility such as a computer center where internal heat load occurs all day long, electronic equipment (including power supply equipment) installed in the center operates all day long. Therefore, if the supply of air from the air conditioner is stopped even for a part of the time, the inside of the computer center tends to reach a high temperature due to the heat generated by the electronic devices that operate all day long, and the electronic devices are likely to be damaged. Therefore, in indoor facilities that operate all day, such as computer centers, air conditioners are constantly operating to cool the electronic devices from the viewpoint of preventing damage to the electronic devices. The above-mentioned repair work for air conditioning equipment installed in such indoor facilities is carried out by stopping the electronic equipment together with the air conditioning equipment, or by stopping only the air conditioning equipment without stopping the electronic equipment. It is difficult to stop heat load generating equipment such as electronic equipment in indoor facilities because huge compensation etc. will be required. Therefore, in an indoor facility such as a computer center where installed electronic equipment operates all day, it is necessary to carry out repair work promptly by minimizing the period during which air-conditioning is stopped to remove the heat load.

For example, as a method of repair work that minimizes the suspension of air conditioning equipment, when installing temporary bypass connecting pipes at two locations outside the existing duct renewal range, first stop the air conditioning, and then install the temporary bypass connecting pipe of the existing duct. After drilling the connection part of the temporary bypass, attach a temporary bypass connection pipe with a lid, and after restoring the air conditioning, remove the lid while the inside of the temporary bypass connection pipe is closed from the packer, and replace the temporary bypass duct with the temporary bypass connection pipe. connect to. Next, drill holes at both ends of the renewal range of the existing duct, insert the packers into both ends of the existing duct from the drilled holes, close the existing duct with the packers, and collect the packers in the temporary bypass connection pipe. Therefore, it has been proposed to divert air from an air conditioner from an existing duct to a temporary bypass duct (see, for example, Patent Document 1).

In addition to this, there is a method in which a casing box having a folded and retracted balloon on top is installed in the middle part of the duct in advance, and the balloon of the casing box is inflated inside the casing box to close the duct. It has been proposed (see, for example, Patent Document 2).

Japanese Patent No. 4341862 Japanese Patent No. 6386725

In the repair work disclosed in the above-mentioned Patent Document 1, after connecting the temporary bypass connection pipe to the existing duct, the part of the existing duct to which the temporary bypass connection pipe is connected is drilled using a plasma torch or the like. , it is necessary to form an opening for inserting a packer that closes both ends of the renewal range of the existing duct. In this case, we have no choice but to adopt a construction method with fire, and it is difficult to obtain permission for renovation work. It is essential to turn off the air conditioning because smoke and odors are emitted. In addition, as described above, in the method of diverting the air from the air conditioner from the existing duct to the bypass duct, it is necessary to install a temporary bypass, close the renewal area, and remove the temporary bypass. , there is a problem that the repair work itself becomes large-scale and the work time associated with it becomes long. Further, the work of drilling an existing duct using a plasma torch, for example, is a very dangerous work because dust inside the duct may catch fire.

In addition, in Patent Document 2, if the existing duct has casing boxes installed in advance, it is possible to easily perform repair work with the range between casing boxes as an update range, but many existing ducts are not repaired due to economic reasons. Due to the difficulty in estimating the area, it is not possible to install equipment for repair assuming the time of repair, and in many cases casing boxes are not installed. Therefore, in an existing duct without a casing box installed, it is necessary to perform work to update the renewal range of the existing duct using the repair work disclosed in Patent Document 1 or the like.

Therefore, in the present invention, it is possible to perform repair work such as updating the existing duct, installing a new duct, and installing a damper in the duct with respect to the supply air duct of the air conditioner while the air conditioner is in operation. An object of the present invention is to provide a method for repairing an air conditioning facility.

According to one aspect, a method for repairing an air conditioning facility includes an existing air supply main duct that is provided in the ceiling of the target room and into which air temperature-controlled by the air conditioner is sent, and the ceiling of the target room. and at least two or more air valves for blowing out the air branched and supplied from the existing air supply duct branching from the existing air supply main duct, in a method for repairing an air conditioning facility, wherein at least two or more air valves Among them, the process of inserting the balloon into the existing air supply main duct from the air control port provided downstream of the air supply duct from the planned renovation part where the lid is installed on the side of the existing air supply main duct, and the existing A step of inflating the balloon inserted inside the air supply main duct of the existing air supply main duct and blocking the existing air supply main duct downstream of the position where the balloon is inserted, on the side of the part to be repaired; In the air supply main duct, the process of repairing the facility on the downstream side of the part to be repaired from the point blocked by the inflated balloon, and the process of deflating the inflated balloon and removing it from the inserted air terminal. characterized by having

According to another aspect, a method for repairing an air conditioning facility comprises: a header duct provided outside a target room and into which air cooled by a first air conditioner is sent; and an existing air supply duct having at least one or more air control holes for blowing out the air sent into the header duct, wherein the existing air supply duct has at least one of the air control holes that blows out the air. A process of inserting a balloon into the existing air supply duct from an air control port provided downstream, and an air control in which the balloon inserted inside the existing air supply duct is inflated and the existing air supply duct balloon is inserted. A process of closing the existing air supply duct on the downstream side of the mouth, a process of repairing the equipment on the downstream side of the blockage by the inflated balloon in the existing air supply duct, and deflating the inflated balloon. After that, it has a step of removing it from the inserted air valve.

According to the present disclosure, it is possible to update the ducts of the air conditioning equipment, install new ducts, and perform repair work such as installing dampers in the ducts while the air conditioning equipment is in operation.

FIG. 2 is a schematic diagram showing an example of air conditioning equipment having a header duct in a machine room set in an indoor facility such as a computer center; FIG. 4 is a diagram showing an example of an inflated balloon; FIG. 4 is a diagram showing an example of the position of a joint portion of a balloon; It is a figure which shows an example of the damper for air volume adjustment. It is a flowchart which shows an example of the flow (repair method) of the repair work with respect to an air conditioner. FIG. 6 is a schematic diagram showing an example of a repaired state of the air conditioning equipment when performing repair work on the air conditioning equipment shown in FIG. 5 ; FIG. 7 is a schematic diagram showing an example of a repaired state of the air conditioner following FIG. 6 ; FIG. 8 is a schematic diagram showing an example of a repaired state of the air conditioner following FIG. 7 ; FIG. 9 is a schematic diagram showing an example of a repaired state of the air conditioner following FIG. 8 ; FIG. 10 is a schematic diagram showing an example of a repaired state of the air conditioner following FIG. 9 ; FIG. 11 is a schematic diagram showing an example of a repaired state of the air conditioner following FIG. 10 ; FIG. 12 is a schematic diagram showing an example of a repaired state of the air conditioner following FIG. 11 ; It is a schematic diagram which shows an example of the air conditioner after repair work. FIG. 10 is a diagram showing a modified example of rolling prevention measures for a balloon; FIG. 10 is a diagram showing another modified example of measures to prevent the balloon from rolling. FIG. 10 is a diagram showing another modified example of measures to prevent the balloon from rolling. An example of an air conditioning system in which an air conditioner is installed in the machine room and connected to the air supply duct in the ceiling of the room where the indoor facility is located via the main supply air duct in either the machine room or the room where the indoor facility is located. It is a schematic diagram showing.

An embodiment of a method for repairing an air conditioner will be described below with reference to the drawings.

FIG. 1 shows an example of air conditioning equipment having a header duct in a machine room set in an indoor facility such as a computer center. As shown in FIG. 1, the indoor equipment 1 in which the air conditioning equipment 2 is arranged includes two air conditioning machine rooms 10 and 20 and an air conditioning room 30 (target room) provided between the two air conditioning machine rooms 10 and 20. and Here, the air conditioning machine rooms 10 and 20 are rooms in which a plurality of air conditioners are installed, and the air conditioning room 30 is cooled (temperature controlled) by air from the air conditioners installed in the air conditioning machine rooms. is the room. Note that the number of air-conditioning machine rooms is not limited to two, and may be one or three or more.

The air-conditioning machine room 10 installs the air-conditioning machines 11, 12, 13, and 14 and the header duct 15 inside, for example. Air supply delivery portions of the air conditioners 11, 12, 13, 14 are connected to a header duct 15 via corresponding base ducts 11a, 12a, 13a, 14a. In FIG. 1, four air conditioners 11, 12, 13, and 14 are installed in the air conditioning machine room 10 as an example, but the number of air conditioners is limited to four. isn't it.

The air conditioners 11, 12, 13, and 14 are individually driven and controlled by a control device (not shown). Here, in the present embodiment, there are a mounted part (lower half of FIG. 1) where the heat-generating equipment in the air conditioning room 30 is installed and a non-mounted part (upper half of FIG. 1) where the heat generating equipment is not installed. It also shows a situation in which the part that takes charge of the unmounted part is installed in the air conditioning machine room 10 . The white air conditioners show the state in which air is sent out to handle the heat load of the mounted part, and the black air conditioners show the state in which air is not sent out to handle the unmounted part. there is In FIG. 1, the air from the air conditioners 11 and 13 shown in white is sent to the header duct 15, and the air from the air conditioners 12 and 14 shown in black is not sent to the header duct 15. . It should be noted that the switching of whether or not air is sent out by the air conditioners 11, 12, 13, and 14 causes the air supply from the air conditioners to be driven to flow backward to the air conditioners that are not in operation, and a predetermined air volume to be supplied to the header duct 15. In order to prevent this, backflow prevention and air supply are performed by opening/closing control of a damper (not shown) of the air conditioner.

The header duct 15 is, for example, a duct that joins the air sent out from any one of the air conditioners 11, 12, 13, and 14 and sends the air to the supply air ducts 40 and 50 connected to the header duct 15, for example. The header duct 15 has a large air volume in a facility with a high heat load such as a computer center, and although it depends on the air volume, it has a size of, for example, 2000 mm in width and 1600 mm in height, which is sufficient for human work inside. It's size.

The air conditioning machine room 20 has air conditioners 21, 22, 23 and 24 and a header duct 25 installed therein, for example. Air supply delivery portions of the air conditioners 21, 22, 23, 24 are connected to a header duct 25 via corresponding base ducts 21a, 22a, 23a, 24a. In FIG. 1, four air conditioners 21, 22, 23, and 24 are installed in the air conditioning machine room 20 as an example, but the number of air conditioners is limited to four. isn't it.

The air conditioners 21, 22, 23, and 24 are individually driven and controlled by a control device (not shown). In FIG. 1, there are a mounted part (lower half of FIG. 1) where the heat generating equipment in the air conditioning room 30 is installed and an unmounted part (upper half of FIG. 1) where the heat generating equipment is not installed. It also shows a situation in which the person in charge is installed in the air conditioning machine room 20 . White air conditioners 21 and 23 indicate the state in which air is sent to the header duct 25 in order to cope with the heat load of the mounted portion, and black air conditioners 22 and 24 are in charge of the unmounted portion. A case where air is not sent out to the header duct 25 is illustrated. It should be noted that the switching of whether or not the air is sent out by the air conditioners 21, 22, 23, and 24 causes the air supply from the air conditioners to be driven to flow backward to the air conditioners that are not in operation, and the predetermined air volume to be supplied to the header duct 25 becomes impossible. In order to prevent this, backflow prevention and air supply are performed by opening/closing control of a damper (not shown) of the air conditioner.

The header duct 25 is, for example, a duct that joins the air sent out from any one of the air conditioners 21, 22, 23, 24 and sends the air to the supply air ducts 40, 50 connected to the header duct 25, for example. The header duct 25, like the header duct 15, has a size of, for example, 2000 mm in width×1600 mm in height, which is large enough for a human to work inside.

The air-conditioned room 30 is, for example, a room in which electronic devices such as power supply devices and supercomputers are installed. It should be noted that the above-described power supply equipment and electronic equipment always operate. In the air-conditioned room 30, for example, air supply ducts 40 and 50 are arranged in the upper part of the room above the ceiling. The air supply ducts 40, 50 may be exposed if they are directly above the ceiling. Note that the number of air supply ducts is not limited to two, and may be one or three or more.

The air supply duct 40 has air control openings 41, 42, 43, and 44 which are connected via short pipes for branching the air supply and are installed on the ceiling surface or the virtual ceiling surface if the ceiling is straight. Air sent out from 25 is supplied to each air control port 41 , 42 , 43 , 44 . In FIG. 1, reference numerals 41, 42, 43, and 44 are attached to the air control openings provided in the air supply duct 40 from the left side in FIG.

In computer centers and factories, the air control ports 41, 42, 43, and 44 are often register-type outlets in which a shutter is attached to a universal grill having parallel strip-shaped movable blades. It is, for example, an HS air valve that can adjust the direction and volume of the air blown out by (H) and the shutter (S). The air control openings 41 , 42 , 43 , 44 are branched via short ducts and are positioned on the lower surface of the air supply duct 40 and provided in a suspended form. Therefore, the air blown out from the air control ports 41, 42, 43, 44 is dispersed to some extent in the vertical direction from the top to the bottom of the air conditioning room 30 and blown out. Therefore, the air blown out from these air control ports 41, 42, 43, 44 cools heat load generating equipment such as power supply equipment, which is arranged in the vicinity below these air control ports 41, 42, 43, 44. do. Here, in FIG. 1, the arrows pointing outward from the four directions of the outer peripheral edge of the air control ports 41, 42, 43, and 44 indicate that the air is directed downward in the air conditioning chamber 30 from the vertical direction by the movable vanes. It indicates that the particles are dispersed to some extent and blown out.

The air supply duct 40 has a sectional damper 45 between the air terminals 42 and 43 . The sectional damper 45 has the same form as a volume damper (VD) in detail, and a plurality of blades are opened and closed by movement such as rotation, and the flow rate of air passing through the damper is adjusted depending on the open/closed state. When the sectional damper 45 is closed (occluded), the duct portion (symbol 40a in FIG. 1) of the air supply duct 40 located on the left side in FIG. 40b) in FIG. In this state, the air sent out from the header duct 15 is blown out from the air control ports 41 and 42 into the air-conditioned room 30, and the air sent out from the header duct 25 is blown out from the air control ports 44 and 43 into the air-conditioned room 30. is blown out inside the In the present embodiment, the white damper indicates an open (open) state, and the black damper indicates a closed (closed) state. In FIG. 1, the partitioned damper 45 painted in black shows a closed (blocked) state, and the mounting area (the lower part of the air conditioning room 30 in FIG. 1) is the area where the air conditioners 11 and 13 of the air conditioning machine room 10 are in charge. and an area that the air conditioners 21 and 23 of the air conditioning machine room 20 are in charge of.

The air supply duct 50 has air control openings 51, 52, 53, 54 located on the sides of the air supply duct 50 and oriented sideways so as to blow out the supply air branched through the short pipe duct, The air sent out from each header duct 15, 25 is supplied to each air control port 51, 52, 53, 54. As shown in FIG. In FIG. 1, reference numerals 51, 52, 53, and 54 are attached to the air control openings provided in the air supply duct 50 from the left side in FIG.

Like the air control ports 41, 42, 43, and 44, the air control ports 51, 52, 43, and 44 are register-type outlets in which a shutter is attached to a universal grill having parallel strip-shaped movable blades. An example is an HS air valve, which can adjust the direction and volume of the air blown out by (H) and the shutter (S). Although not shown in the drawings, the HS air valve, which is a register-type outlet, has a shutter ( S) can be pulled out to the front and has a large opening when the shutter is removed. Since the air control ports 51, 52, 53, 54 are provided on the side surface of the air supply duct 50, the air blown out from the air control ports 51, 52, 53, 54 is directed from the sides of the air conditioning room 30 to the center. , while being dispersed by the horizontal blades (H) from the horizontal direction. This blowing of air cools heat load generating equipment such as power supply equipment arranged in the center of the air conditioning room 30 . Here, in FIG. 1, upward arrows from the air control ports 51, 52, 53, 54 indicate that the air is dispersed and blown out from the horizontal direction toward the center of the air-conditioned room.

The air supply duct 50 has a sectional damper 55 between the air terminals 52 and 53 . The partitioned damper 55, like the partitioned damper 45, has a plurality of blades that are opened and closed by movement such as rotation, and the flow rate of air passing through the damper is adjusted according to the open/closed state. When the sectional damper 55 is closed (occluded), the duct portion (symbol 50a in FIG. 1) located on the left side of the air supply duct 50 in FIG. 50b) in FIG. In this state, the air sent out from the header duct 15 is blown out from the air control ports 51 and 52 into the air-conditioned room 30, and the air sent out from the header duct 25 is blown out from the air control ports 54 and 53 into the air-conditioned room 30. is blown out inside the In addition, in FIG. 1, the divided damper 55 painted in black shows a closed (closed) state.

Hereinafter, in this embodiment, in the air conditioning equipment 2 for the indoor facility 1, a new air supply duct 60 to be described later and an air volume adjustment damper (flow rate adjustment damper) 80 (see FIG. 4) in the air supply ducts 40, 50, 60 ) will be explained on the assumption that renovation work will be carried out to newly install A new air supply duct 60 is newly installed at a position A indicated by a two-dot chain line in FIG. Also, the air supply duct 60 indicates a new air supply duct that includes all of the main duct 60a, branch ducts 60c and 60d, and rising ducts 60e and 60f (see FIG. 13).

In the repair work, if the header duct 15 or the header duct 25 is newly provided with a branch duct 60d or a branch duct 60c from the header duct 15 or the header duct 25, it will be installed in either one of the air conditioning machine rooms 10 and 20 described above. While the installed air conditioner is driven to ensure air-conditioning air volume in the existing area, the drive of the air conditioner installed on the other side is stopped to stop the ventilation of the header duct on one side. At the same time, the sectional damper 45 provided in the air supply duct 40 and the sectional damper 55 provided in the air supply duct 50 are each opened. By doing these things, it is possible to continuously blow air from the air valve, which is assumed to stop blowing air if the damper is still divided.

However, when the above operation is performed, the air from the driven air conditioner is also sent through the supply air ducts 40 and 50 to the header duct connected to the stopped air conditioner. Therefore, for example, when an air supply duct 60 is newly installed between the header duct 15 and the header duct 25, or when a damper such as an air volume adjustment damper (VD: Volume Damper) 80 is installed in the air supply ducts 40 and 50. , the air sent into the header ducts 15, 25 prevents work inside the header ducts 15, 25.

Therefore, in the present embodiment, the existing air supply ducts 40, 50 are installed in the vicinity of the connecting portions between the air supply ducts 40, 50 and the header ducts 15, 25 in order to allow work to be performed inside the header ducts 15, 25. are closed to prevent air from being sent into the header ducts 15 and 25. - 特許庁As a method for closing the air supply ducts 40, 50, in this embodiment, for example, the folded balloon 70 is inserted into the air supply ducts 40, 50 through the opening obtained by removing the face of the air terminal and the inner shutter. After that, the balloon 70 is inflated inside the air supply ducts 40, 50, and the inflated balloon 70 closes the air supply ducts 40, 50 (see FIGS. 2 and 3).

FIG. 2 shows an example of an inflated balloon. As shown in FIG. 2, the shape of the inflated balloon 70 is substantially rectangular parallelepiped. Also, although illustration is omitted, the balloon 70 is folded into a size that can be inserted through the openings of the air control openings of the air supply ducts 40 and 50 in a deflated state. The material of the balloon 70 is, for example, a transparent or translucent synthetic resin material. The material of the balloon 70 may be a colored synthetic resin material. The height (length in the Z direction in FIG. 2) H and width (length in the X direction in FIG. 2) W of the balloon 70 are, for example, minus 50 mm relative to the height and width inside the duct. set to an extent. On the other hand, the thickness (depth: length in the Y direction in FIG. 2) D of the balloon 70 is not particularly limited, but the diagonal of the rectangle formed by the thickness D and the height H is 1 of the height H. .2 times or more, and it is desirable that the size is such that it does not roll over due to wind pressure, which will be described later. When the compressed air is enclosed inside the balloon 70, for example, a slightly larger amount than the appropriate amount of compressed air is enclosed. Therefore, the balloon 70 is in a slightly inflated state compared to when an appropriate amount of compressed air is enclosed. In this state, of the wall surfaces of the balloon 70, the side surfaces facing the inner wall surfaces of the air supply ducts are pressed against the inner wall surfaces of the air supply ducts 40, 50, making it possible to close the air supply ducts 40, 50. do.

The balloon 70 is internally provided with traction members 71 such as threads at a plurality of locations across the side surfaces 70a and 70b. By providing the traction member 71, it is possible to prevent the expansion of the balloon 70 in the direction orthogonal to the side surfaces 70a and 70b (longitudinal direction of the air supply ducts 40 and 50). To prevent air leakage due to contraction of dimensions of height H and width W. In FIG. 2, the traction members 71 are provided at a total of 12 locations, 3 locations in the height direction (Z direction in FIG. 2) and 4 locations in the width direction (X direction in FIG. 2). The position or location where the member 71 is provided is not limited to this.

A side 70a of the balloon 70 has a joint portion 72 at the center of the side 70a leading to the inside of the balloon. The joint portion 72 may be, for example, a bamboo shoot type joint. The joint portion 72 connects the other end of a tube (hose) 74 having one end connected to the pump 73 (see FIG. 3). The pump 73 sends compressed air into the balloon 70 through the tube 74 when driven.

Here, the position of the joint portion 72 will be described. FIG. 3 shows an example of the position of the joint portion 72 of the balloon. Note that FIG. 3 shows a state in which the balloon 70 carried in from the opening of the air control port 44 is installed in the air supply duct 40 and compressed air is sent by the pump 73 . As shown in FIG. 3A, when the joint portion 72 is displaced downward from the midpoint C in the height direction (the Z direction in FIG. 2) of the balloon 70, the balloon may Air is biased toward the bottom, and the top swells in a narrow state, so it is easy to fall over. Also, even if the balloon is successfully inflated to some extent at that position, the portion forming the upper part of the balloon 70 receives the pressure of the air flowing inside the air supply duct 40 and moves downstream with the joint 72 as a fulcrum. There is a risk that the balloon 70 will move and fall down during the process of enclosing the compressed air. In addition, when the balloon 70 is displaced upward from the midpoint C in the height direction (the Z direction in FIG. 2), the portion forming the lower portion of the balloon 70 is the air flowing through the air supply ducts 40 and 50. pressure, it moves downstream and lifts up. As a result, if the position of the joint portion 72 is displaced from the midpoint C in the height direction (the Z direction in FIG. 2), the relative position of the balloon 70 with respect to the air supply duct is displaced. 50 may not be closed. Therefore, as shown in FIG. 3B, in order to prevent rolling of the balloon 70, the position of the joint portion 72 in the height direction of the balloon 70 (Z direction in FIG. It is provided at a position corresponding to the midpoint C in the Z direction in FIG.

The position of the joint portion 72 in the width direction of the balloon 70 (the X direction in FIG. 2) is also the same as the height direction (the Z direction in FIG. 2). A joint portion 72 is provided at the midpoint position. Although the length of the balloon 70 in the depth direction (the Y direction in FIG. 2) is not described, in order to prevent the balloon 70 from rolling during the process of inflating the balloon 70, the depth direction of the balloon 70 (the Y direction in FIG. 2) is The length in the middle Y direction) may be approximately the same as the length in the height direction (the Z direction in FIG. 2).

Next, the air volume adjusting damper 80 to be installed later inside the existing air supply duct will be described. FIG. 4 shows an example of an air volume adjusting damper. Note that FIG. 4 shows a cross-sectional view orthogonal to the ventilation direction in which the air volume adjustment damper 80 is installed in the air supply duct 40 . As shown in FIG. 4, the air volume adjusting damper 80 is a combination of a total of four small dampers 81, two in the vertical direction and two in the horizontal direction. The damper 81 has a plurality of drive shafts 82, a plurality of vanes 83, a transmission mechanism (not shown) inside the air supply duct, and an opening/closing mechanism 85 and an operation handle 86 outside the air supply duct. The four dampers 81 are of a size that can be carried in and out from the openings of the air control ports of the air supply ducts 40 and 50, for example, and can be assembled as the air volume adjustment dampers 80 inside the air supply ducts 40 and 50. is a damper capable of FIG. 4 illustrates a case where one damper 81 has three vanes 83 .

The drive shaft 82 is pivotally supported by the frame 87 with a predetermined vertical interval, with the rotation axis direction of the drive shaft 82 being horizontal. It should be noted that the predetermined interval may be, for example, an interval that allows the adjacent blade portions 83 to overlap each other at the upper end portion or the lower end portion when the damper 81 is closed.

Among the plurality of drive shafts 82 , both ends of the drive shaft 82 located in the center in the vertical direction protrude outward from the frame 87 . Before assembling the four dampers 81, a hole through which the drive shaft 82 penetrates is formed in the side surface of the existing air supply duct 40 where the drive shaft 82 of each damper 81 is located. First, the other end of the drive shaft 82 is inserted through the opening of the air supply duct. One end of the drive shaft 82 is connected to the drive shaft 82 projecting from the frame 87 of the adjacent damper 81 (not shown). The other end of the drive shaft 82 protrudes from the air supply duct 40 and, if necessary, is connected to an opening/closing mechanism 85. At its end, an operation handle 86 can be operated from the outside of the air supply duct 40. set in

The transmission mechanism (not shown) rotates the other drive shaft 82 of the damper 81 when the drive shaft 82 connected to the opening/closing mechanism 85 or the drive shaft 82 connected to the adjacent air supply duct 40 rotates. They are rotated in conjunction with each other. Examples of the transmission mechanism include a mechanism using a plurality of gears, a mechanism having pulleys and belts, and the like.

The opening/closing mechanism 85 is a mechanism that receives a rotation operation of the operation handle 86 and converts the rotation of the operation handle 86 into rotation of the drive shaft 82 whose axial direction is orthogonal. In FIG. 4, the opening/closing mechanism 85 and the operating handle 86 are provided on both of the two dampers 81 juxtaposed in the left-right direction, but they may be provided on either one of them.

Next, an example of the flow of repair work (repair method) for the air conditioning equipment shown in FIG. 1 will be described based on the flowchart of FIG. FIGS. 6 to 12 sequentially show an example of the repaired state of the air conditioner when performing the repair work on the air conditioner shown in FIG. 5, and FIG. 13 shows an example of the air conditioner after the repair work.

Hereinafter, the work of newly installing the air supply duct 60 in the air conditioning equipment 2 for the indoor facility 1 shown in FIG. do. It should be noted that the newly installed air supply duct 60 is arranged along the lower floor surface of the indoor facility 1 for the convenience of cooling the heat load generating equipment. In the following procedure, the branching ducts 60d and 60c are provided in order from the state shown in FIG. , 10).

Step S1 is a process of curing the air terminal. In the state shown in FIG. 1, an operator removes dust accumulated in the existing air supply duct 40, air control openings 41, 42, and 43 installed in the air supply duct 50, and air control openings 51, 52, and 53. However, by touching the existing duct, gently open the face so as not to scatter it through the air terminal, and place the Philedon filter (coarse dust filter) on the face. After that, curing is performed under the ceiling for removing the register from the air terminal 44 for inserting the balloon 70 of the existing air supply duct 40 . Similarly, under-ceiling curing for removing the register for the air terminal 54 of the air supply duct 50 is performed. First, in order to provide a branch duct 60d for connecting the air supply duct 60 on the header duct 25 side, the operator cures the air control ports 44 and 54. As shown in FIG. By curing the air control ports 44 and 54, when carrying in and out of balloons through the openings of the air control ports 44 and 54, dust and dirt from the air control ports 44 and 54 and the inside of the duct can be prevented. to prevent residue from falling. The Philedon filters mounted on the faces of the other air control ports 41, 42, 43, 51, 52, 53 keep dust accumulated in the ducts from blowing out. The air control ports 44 and 54 in this embodiment are HS air control ports, and although illustration is omitted, the HS air control ports, which are register-type air outlets, are attached with the horizontal blades (H) pivotally supported. A shutter (S) located in the back can be drawn forward when the blower outlet face is removed from the lower surface of the ceiling, and when the shutter is removed, a large opening is formed. Therefore, the folded balloon 70 and the four divided dampers 81 can be carried into the air supply ducts 40 and 50 through the opening.

Step S2 is a process of opening the partition damper. As shown in FIG. 6, the operator opens the sectional damper 45 and the sectional damper 55 from the closed state. As described with reference to FIG. 1, in the present embodiment, the partition dampers 45 and 55 are closed in black, and open in white.

Step S3 is a process of switching air conditioners. As shown in FIG. 6, the operator drives all the air conditioners 11, 12, 13 and 14 installed in the air conditioner room 10. As shown in FIG. The dampers installed in the base ducts 12a and 14a of the air conditioners 12 and 14, which have been stopped until now, are opened in accordance with the operation of the air conditioners 12 and 14 to prevent backflow. As described in FIG. 1, in this embodiment, the air conditioners 11, 12, 13, and 14 and the air conditioners 21, 22, 23, and 24 are painted black to indicate that they are stopped or their dampers are blocked. A state in which the drive or damper is open is shown in white.

Also, as shown in FIG. 6, the operator stops driving all the air conditioners 21, 22, 23, and 24 installed in the air conditioning machine room 20. FIG. When the air conditioners 21 and 23 stop, the dampers installed in the base ducts 21a and 23a of the air conditioners 21 and 23 which have been in operation and which are open to prevent backflow are closed. As a result, the dampers in the base ducts 21a, 22a, 23a, and 24a are closed together with the dampers in the base ducts 22a and 24a, which have been closed to prevent backflow, so that the air in the header duct 25 becomes a dead end. Become.

Therefore, the air sent from the air conditioners 11 , 12 , 13 and 14 arranged in the air conditioner room 10 is sent to the header duct 15 . Here, in step S2, the partition damper 45 is opened. As a result, the air sent from the header duct 15 to the air supply duct 40 is blown out not only from the air control ports 41 and 42 but also from the air control ports 43 and 44 after passing through the sectional dampers 45 .

Similarly, the air sent from the header duct 15 to the air supply duct 50 is not only blown out from the air control ports 51 and 52, but also passes through the section damper 55 and is blown out from the air control ports 53 and 54. be. However, in this state, although the header duct 25 is communicated with the header duct 25, the air flow in the header duct 25 is stopped.

Step S4 is a process of installing a balloon. As shown in FIG. 7, the operator inserts the folded balloon 70 into the air supply duct 40 through the opening of the air valve 44 . At the same time, the folded balloon 70 is inserted into the air supply duct 50 through the air control port 54 .

As shown in FIG. 7, the position where the balloon 70 is inserted is immediately downstream of the air terminals 44, 54 near the header duct 25. As shown in FIG. After inserting the folded balloon 70 into each of the air supply ducts 40 and 50, the pump 73 (see FIGS. 2 and 3) is driven to inflate the balloon 70. As shown in FIG. By inflating the balloon 70, the inflated balloon 70 is pressed against the air supply ducts 40, 50, and the air supply ducts 40, 50 are closed. Since the header duct 25 is originally a dead end and there is no place where air blows out, the balloon 70 can be inflated even immediately downstream of the air control ports 44 and 54 in a calm place where there is almost no air flow. Therefore, the air sent from the header duct 15 is not sent from the air supply ducts 40 and 50 to the header duct 25 side. By closing the air supply ducts 40 and 50, even if the header duct 25 is subsequently opened, no air is supplied to the header duct 25, so that work inside the header duct 25 can be performed without wind. becomes possible.

On the other hand, since the air supply ducts 40 and 50 are closed by the balloon 70, the air sent into the air supply ducts 40 and 50 is discharged through the air control openings 41, 42, 43, and Air is blown into the air-conditioned room 30 from any one of 44 , 51 , 52 , 53 , 54 . Regarding the air control ports 44 and 54, from the viewpoint of blowing air volume, the tube 74 is attached to the joint portion 72 and treated so that air does not leak through the tube 74. Then, the gap between the shutter (S) and the lateral blade (H ), it is desirable to temporarily restore the shutter and the face by passing the tube 74 through the gap.

Therefore, when the processing up to step S4 is performed, the air sent out from all the air conditioners 11, 12, 13, and 14 installed in the air conditioning machine room 10 causes the electronic equipment installed in the mounting area of the air conditioning machine room 30 to of heat load generating equipment are cooled.

Step S5 is a process of connecting a branching duct to the header duct (performing branch extraction). As shown in FIG. 7, an operator punches a side plate of the header duct 25 to open it, and then connects the branching duct 60d to the opening. A general method may be used for connecting the branch duct 60d to the header duct 25, so details of the process are omitted. As a result, the branch duct 60 d is arranged across the air conditioning machine room 20 and the air conditioning room 30 .

Step S6 is a process of installing an air volume adjusting damper in the branch duct. As shown in FIG. 7, the operator installs one air volume adjusting damper (flow rate adjusting damper) 88 matching the duct size from the end side of the branching duct 60d to the branching duct 60d. Since it is a new installation, the operator does not need to install the air volume adjustment damper 80 from the inside of the duct unlike the existing installation. In addition, in the air volume adjustment damper 88, the same components as those of the air volume adjustment damper 80 are denoted by the same reference numerals, and detailed description of the configuration will be omitted.

Step S7 is a process of closing the air volume adjusting damper installed in the branch duct. As shown in FIG. 7, the operator operates the operation handle 86 (see FIG. 4) of the air volume adjustment damper 88 installed in the branch duct 60d to close the air volume adjustment damper 88. As shown in FIG.

Step S8 is a process of removing the balloon 70. FIG. As shown in FIG. 8, the operator removes the temporarily restored shutters and faces of the air control port 44 and the air control port 54, and then discharges the air from the inflated balloon 70 manually or with a pump 73 or the like. Wither. Then, the operator takes out the deflated balloon 70 from the openings of the air control ports 44 and 54 .

Step S9 is a process of installing an air volume adjusting damper in the air supply duct. In the state up to this point, even if the balloon 70 is removed, there is no open opening on the downstream side from the position where the balloon 70 was. There are no strong air currents downstream of the vents 44, 54 other than weak air currents from the duct gaps. As shown in FIG. 8, the operator first opens a hole in the side plate of the air supply duct 40, 50 through which the drive shaft 82 of the damper 81 of the air supply duct 40, 50 is inserted from the opening of the air control port 44, 54. . After that, four dampers 81 are brought in through the openings of the air control ports 44 and 54, and while each drive shaft 82 is inserted into the hole in the side plate of the duct, two in the height direction and two in the width direction are combined. A damper 80 for adjusting air volume is installed in the air supply ducts 40 and 50 . Then, the opening/closing mechanism 85 is connected and installed from the outside of the side plates of the air supply ducts 40 and 50 . Note that, as shown in FIG. 8, the air volume adjusting dampers 80 installed in the air supply ducts 40 and 50 are held in an open state. This completes the removal of the branch duct 60d on the side of the header duct 25 and the installation of the air volume adjusting dampers 80 in the existing air supply ducts 40 and 50 near the header duct 25, as shown in FIG.

Next, take out the branching duct 60c on the side of the header duct 15 and install the respective air volume adjusting dampers 80 in the existing air supply ducts 40 and 50 on the side closer to the header duct 15. FIG.

Step S10 is a process of curing the air terminal. In the state shown in FIG. 9, the worker removes dust accumulated in the air supply duct 40 and the air supply duct 50 installed in the existing air supply duct 40 and the air supply duct 54 restored in step S9. Then, gently open the face so as not to touch the existing duct and scatter it through the air terminal, and place the Philedon filter on the face. After that, curing is performed under the ceiling for removing the register from the air terminal 41 for inserting the balloon 70 of the existing air supply duct 40 . Similarly, under-ceiling curing for removing the register for the air terminal 51 of the air supply duct 50 is performed. First, in order to provide a branch duct 60c for connecting the air supply duct 60 on the header duct 15 side, the operator cures the air control openings 41 and 51. As shown in FIG. By curing the air control openings 41 and 51, when the balloon 70, the damper 81, etc. are carried in and out through the openings of the air control openings 41 and 51, dust, dirt, and dust remaining in the duct from the air control openings 41 and 51 are prevented. to prevent residue from falling. Philedon filters mounted on the faces of the other air control ports 42, 43, 44, 52, 53, 54 keep the accumulated dust in the ducts from blowing out. The air control ports 41 and 51 in this embodiment are HS air control ports, and although illustration is omitted, the HS air control ports, which are register-type air outlets, are attached with the horizontal blades (H) pivotally supported. A shutter (S) located in the back can be drawn forward when the blower outlet face is removed from the lower surface of the ceiling, and when the shutter is removed, a large opening is formed.

Step S11 is processing for switching air conditioners. As shown in FIG. 9, the operator drives all the air conditioners 21, 22, 23, 24 installed in the air conditioning machine room 20, and the air conditioners 21, 22, 23, 24 from all the air conditioners 21, 22, 23, 24 to the header duct 25. air delivery. The dampers of the closed base ducts 21a, 21b, 21c, and 21d are opened to send air from each air conditioner.

Further, as shown in FIG. 9, the operator stops driving all the air conditioners 11, 12, 13, and 14 installed in the air conditioning machine room 10. FIG. Backflow is prevented by closing all the backflow prevention dampers installed in the base ducts 11a, 12a, 13a, and 14a. The dampers in the base ducts 21a, 22a, 23a, and 24a are thereby closed, and the air in the header duct 15 becomes a dead end.

Therefore, the air sent out from the air conditioners 21 , 22 , 23 , 24 arranged in the air conditioning machine room 20 is sent into the header duct 25 . At this time, since the sectional damper 45 is opened, the air sent from the header duct 25 to the air supply duct 40 passes not only the air control ports 44 and 43 but also the sectional damper 45 to the air control ports 42 and 41. is also blown out.

Similarly, the air sent from the header duct 25 to the air supply duct 50 is blown out not only from the air control ports 54 and 53 but also from the air control ports 52 and 51 after passing through the sectional damper 55 . However, in this state, although the header duct 15 is communicated with the header duct 15, the flow of air in the header duct 15 is stopped.

Step S12 is a process of installing a balloon. As shown in FIG. 10 , the operator inserts the folded balloon 70 into the air supply duct 40 through the opening of the air control port 41 . At the same time, the folded balloon 70 is inserted into the air supply duct 50 through the opening of the air control port 51 . In addition, as shown in FIG. 10, the position where the balloon 70 is inserted is immediately downstream of the air control ports 41 and 51 in the vicinity of the header duct 15 . After inserting the folded balloon 70 into each of the air supply ducts 40 and 50, the pump 73 (see FIGS. 2 and 3) is driven to inflate the balloon 70. As shown in FIG. By inflating the balloon 70, the inflated balloon 70 is pressed against the inner wall surfaces of the air supply ducts 40, 50, and the air supply ducts 40, 50 are closed. Since the header duct 15 is originally a dead end and there is no point where air blows out, the balloon 70 can be inflated even immediately downstream of the air control ports 41 and 51 in a calm place where there is almost no air flow. Therefore, the air sent from the header duct 25 is not sent from the air supply ducts 40 and 50 to the header duct 15 side. By closing the air supply ducts 40 and 50, even if the header duct 15 is subsequently opened, no air is supplied to the header duct 15, so that work inside the header duct 15 can be carried out without wind. becomes possible.

On the other hand, since the air supply ducts 40, 50 are closed by the balloon 70, the air sent into the air supply ducts 40, 50 is discharged through the air control openings 44, 43, 42, 41, 54, 53, 52, 51 blows out into the air-conditioned room 30. FIG. Regarding the air control ports 41 and 51, from the viewpoint of blowing air volume, the tube 74 is attached to the joint portion 72 and treated so that air does not leak through the tube 74. Then, the gap between the shutter (S) and the lateral blade (H ), it is desirable to temporarily restore the shutter and the face by passing the tube 74 through the gap.

Therefore, when the processing from step S10 to step S12 is performed, the air sent out from all the air conditioners 21, 22, 23, and 24 installed in the air conditioning machine room 20 is installed in the mounting area of the air conditioning machine room 30, for example. A heat load generating device such as an electronic device is cooled.

Step S13 is a process of connecting a branching duct to the header duct (performing branch extraction). As shown in FIG. 10, an operator punches a side plate of the header duct 15 to make an opening, and then connects the branch duct 60c to the opening. A general method may be adopted for the process of connecting the branch duct 60c to the header duct 15, so details of the process will be omitted. As a result, the branch duct 60 c is arranged across the air conditioning machine room 20 and the air conditioning room 30 .

Step S14 is a process of installing an air volume adjusting damper in the branch duct. As shown in FIG. 10, the operator installs one air volume adjusting damper 88 matching the dimensions of the branch duct 60c from the end side of the branch duct 60c. Since the branching duct 60c is newly installed like the branching duct 60d (step S6), the operator does not need to install the air volume adjusting damper 80 from the inside of the duct unlike the existing installation.

Step S15 is a process of closing the air volume adjusting damper installed in the branch duct. As shown in FIG. 10, the operator operates the operation handle 86 (see FIG. 4) of the air volume adjustment damper 88 installed in the branch duct 60c to close the air volume adjustment damper 88. As shown in FIG.

Step S16 is a process of removing the balloon. As shown in FIG. 11, the operator removes the shutters and faces of the temporarily restored air control port 41 and air control port 51, and then expels the air from the inflated balloon 70 manually or with a pump 73 or the like. Wither. Then, the operator takes out the deflated balloon 70 from the openings of the air control ports 41 and 51 respectively.

Step S17 is a process of installing an air volume adjusting damper in the air supply duct. In the state up to this point, even if the balloon 70 is removed, there is no open opening on the downstream side from the position where the balloon 70 was present. There is no strong air current downstream of the air ports 41, 51 other than weak air currents from the duct gaps. As shown in FIG. 11, the operator first opens a hole in the side plate of the air supply duct 40, 50 through which the drive shaft 82 of the damper 81 of the air supply duct 40, 50 is inserted from the opening of the air control port 41, 51. . After that, four dampers 81 are carried in through the openings of the air control ports 41 and 51, and two dampers 81 in the height direction and two dampers in the width direction are inserted through the holes in the side plates of the air supply ducts 40 and 50, respectively. A total of four dampers 80 for adjusting air volume are installed in the air supply ducts 40 and 50. Then, the opening/closing mechanism 85 is connected and installed from the outside of the side plates of the air supply ducts 40 and 50 .

This completes the removal of the branch duct 60c on the side of the header duct 15 and the mounting of the air volume adjusting dampers 80 in the existing air supply ducts 40 and 50 on the side closer to the header duct 15 shown in FIG.

Step S18 is a process of switching the air conditioner installed in the air conditioning machine room to normal operation. As shown in FIG. 12, among the air conditioners 11, 12, 13, and 14 in the air conditioning machine room 10, the heat load generating device is still installed only in the mounting area, so the worker drives only the air conditioners 11 and 13. Then, air is sent out from the air conditioners 11 and 13 to the header duct 15 . At the same time, the operator drives only the air conditioners 21 , 23 out of the air conditioners 21 , 22 , 23 , 24 in the air conditioning machine room 20 to send air from the air conditioners 21 , 23 to the header duct 25 . The air conditioners 11, 13, 21, 23 that send air open the backflow prevention dampers in the base ducts 11a, 13a, 21a, 23a, and the air conditioners 12, 14, 22, 22, 23 that do not send air are opened. 24 closes the anti-backflow dampers in the base ducts 12a, 14a, 23a, 24a.

Step S19 is a process of closing the partition dampers. As shown in FIG. 12, the operator closes the partition dampers 45 and 55 . Thereby, the left duct portion 40a of the air supply duct 40 and the right duct portion 40b are separated. Further, the left duct portion 50a and the right duct portion 50b of the air supply duct 50 are separated. That is, the air sent from the header duct 15 to the air supply duct 40 is blown out from the air control ports 41 and 42 to the air conditioning room 30 . Also, the air sent from the header duct 25 to the air supply duct 40 is blown out from the air control ports 44 and 43 into the air conditioning room.

Also, the air sent from the header duct 15 to the air supply duct 50 is blown out from the air control ports 51 and 52 into the air conditioning room 30 . Also, the air sent from the header duct 25 to the air supply duct 50 is blown out from the air control ports 54 and 53 into the air conditioning room 30 .

Step S20 is a process of removing the covering of the air terminal. In the state shown in FIG. 12 , the worker removes the covering of the air terminal 41 and the air terminal 51 . In step S10, if the covering of the air terminal 44 and the air terminal 54 is not removed, in this step, the covering of the air terminal 41 and the air terminal 51 is removed and the covering of the air terminal 44 and the air terminal is removed. Also remove the 54 cure. The existing air supply duct 40, the air terminals 42, 43, and 44 installed in the air supply duct 50, and the dust accumulated in the air terminals 52, 53, and 54 touches the existing duct, thereby opening the air terminal. Gently open the face and remove the Philedon filter placed on the face so as not to scatter through the face.

Step S21 is a process of connecting the new air supply duct to the branch duct. As shown in FIG. 12, the operator connects a new main duct 60a between a branch duct 60c branched from the header duct 15 and a branch duct 60d branched from the header duct 25. As shown in FIG. The new main duct 60 a is arranged along the floor surface of the air conditioning room 30 . Therefore, the main duct 60a has raised ducts 60e and 60f that rise vertically from the floor at both ends. The rising ducts 60e and 60f provided at both ends of the main duct 60a are connected to the branching ducts 60c and 60d described above. The air control ports 61, 62, 63, 64 provided in the main duct 60a are preferably provided before connecting to the branch ducts 60c, 60d. The main duct 60a connected to the branch ducts 60c and 60d may or may not be provided with a partition damper. In FIG. 12 and FIG. 13, which will be described later, reference numeral 2' denotes the air conditioner after repair.

Step S22 is a process of opening the air volume adjusting damper 88 of the branch duct. As shown in FIG. 13, the operator operates the operating handle 86 (see FIG. 4) to open the air volume adjusting damper 88 of the new air supply duct 60 which is blocked. As a result, air is sent into the new air supply duct 60, and the air is blown into the air conditioning room 30 from the air control ports 61, 62, 63, 64 of the main duct 60a. Thereby, all repair work of the air conditioner 2 in this embodiment is complete|finished.

In the procedure shown in FIG. 5, after the balloons 70 are installed in the air supply ducts 40, 50, first, the branching ducts 60d, 60c and the air volume adjusting dampers 88 in the branching ducts 60d, 60c are newly installed. , the air volume adjusting dampers 88 in the branch ducts 60d and 60c are closed. Next, an example of removing the balloon 70 from the air supply ducts 40 and 50 and newly installing the air volume adjusting damper 80 in the air supply ducts 40 and 50 has been described, but the procedure is not limited to this. After installing the balloons 70 in the air supply ducts 40, 50, first, the air volume adjusting dampers 80 are newly installed in the air supply ducts 40, 50, and the air volume adjusting dampers 80 in the air supply ducts 40, 50 are closed. Then, the balloons 70 may be removed from the air supply ducts 40, 50, and the branching ducts 60d, 60c and the air volume adjusting dampers 88 in the branching ducts 60d, 60c may be newly installed.

As described above, in the present embodiment, when there is an air terminal in the middle of the air supply duct 40, 50, the operator inflates the balloon 70 inserted into the air supply duct 40, 50 from the opening of the air terminal. , in the vicinity of the header ducts 15, 25, the air supply ducts 40, 50 are closed. At this time, among the air conditioners installed in each of the two air conditioning machine rooms, only the air conditioner installed in one air conditioning machine room is driven, and the air conditioner to be driven is switched for each air conditioning machine room. Therefore, it is possible to continue cooling the electronic equipment installed in the air conditioning room 30 . In addition, since the air volume of the switched air conditioner does not change before and after the repair work, it is possible to stably cool the electronic equipment installed in the air conditioning room 30 .

Further, after connecting the branch duct 60d, an air volume adjustment damper 88 is installed in the branch duct 60d, and by closing the air volume adjustment damper 88, the air control ports of the supply ducts 40 and 50 are closed. Air stays in the duct portions on the downstream side from 44 and 54 and inside the header duct 25 . Therefore, even in a state in which air is blown out from each air control port, a plurality of dampers 81 are carried in through the openings of the air control ports 44, 54, and these dampers 81 are assembled inside the air supply ducts 40, 50. The operation of installing the air volume adjusting damper 80 inside the supply air ducts 40 and 50 can be easily performed without being affected by the air flow. The work of connecting the branch duct 60c is the same.

Further, in the repair work of the air conditioner 2 disclosed in the present embodiment, the air conditioner can be operated continuously even during the repair work, and the influence on the indoor environment and the existing equipment can be eliminated. Furthermore, by enabling the air conditioning to continue operating during construction, it is possible to carry out work without being restricted by work days and work hours, and work can be carried out even on facilities with a 24-hour system. is also possible.

Further, in this embodiment, repair work of the air conditioning equipment 2 is performed by installing the air volume adjusting damper 80 by assembling a plurality of dampers 81 in the air supply ducts 40 and 50 . That is, according to the method for repairing the air conditioning equipment 2 of the present embodiment, if a location where the wind speed is weak can be created by the balloon 70, the air volume adjustment damper 80, or the like, the air volume adjustment damper 80 can be adjusted inside the supply air ducts 40, 50. It is possible to carry out installation work. As a result, since work is mainly performed in the air supply ducts 40 and 50, it is possible to avoid the risk of trouble occurring in operating equipment around the work environment.

Moreover, according to this embodiment, there is no need to install a temporary air conditioner, and there is no need to manufacture or suspend a connecting duct, unlike the conventional construction method. Therefore, compared with the conventional construction method, the construction period can be shortened and the cost can be reduced. In addition, in this embodiment, there is no need to stop the air conditioning, and there is no need to work on holidays or at night, so it is possible to work on weekdays, which also shortens the construction period and reduces costs. is possible.

Hereinafter, modified examples of countermeasures against rolling of the balloon will be described with reference to FIGS. 14 to 16. FIG.

In FIG. 3, as an example, the joint portion 72 of the balloon 70 is arranged at the center of the side surface of the balloon in order to prevent the balloon 70 from rolling. However, the measures against rolling of the balloon 70 need not be limited to the above configuration. 14 to 16, the same components as in FIG. 3 are denoted by the same reference numerals, and detailed description thereof will be omitted.

As a countermeasure against the rolling of the balloon 70, for example, the location where the balloon 70 is installed, instead of the position of the joint portion 72 provided in the balloon 70, is moved in the flow direction of the air flowing inside the air supply duct 40. 14) or a pipe 93 (see FIG. 15) inserted through a sleeve 92 installed at the joint of the air supply duct.

As shown in FIG. 14 , the reinforcing rod 91 is a member used for the purpose of reinforcing the strength of the air supply duct 40 or the like. Here, in FIG. 14, the direction of the arrow is the direction in which the air flows. In this case, the balloon 70 may be arranged on the upstream side of the reinforcing rod 91 in the flow direction of the air flowing inside the air supply duct 40 . In this case, during the process of inflating the balloon 70, the balloon 70 is subjected to a flowing stream of air on the side surface 70a. As a result, the balloon 70 is flowed downstream, but is supported by the reinforcing rod 91, so that the balloon 70 itself is prevented from rolling. Further, even if the installation location of the balloon 70 is upstream of the pipe 93 (see FIG. 15) inserted through the sleeve 92 installed at the joint of the air supply duct 40, that is, the air supply duct 40 The same applies to the upstream side of the pipe 93 that penetrates the cross section of the sleeve 92 of the skeleton penetrating portion.

As a countermeasure against rolling of the balloon 70 , it is also possible to stretch a mooring rope between a plurality of positions near the outer periphery of the side surface 70 a of the balloon 70 and the tube 74 . As shown in FIG. 16, for example, mooring ropes 94a, 94b, 94c, and 94d extending from a tube (hose) 74 are attached to the four corners of the side surface 70a of the balloon 70 where the joint portion 72 is provided. Thereby, the side surface 70a of the balloon 70 is stretched by the mooring ropes 94a, 94b, 94c and 94d. By stretching the mooring ropes 94a, 94b, 94c, and 94d, even if the balloon 70 is affected by the air flowing inside the air supply duct 40, the mooring ropes 94a, 94b, 94c, and 94d keep the balloon 70 in place. Being held, the balloon 70 is prevented from rolling. Note that it is not necessary to use the four corners of the side surface 70a of the balloon 70 as long as they are located at a plurality of positions near the outer periphery of the side surface 70a of the balloon 70. FIG.

Note that any two or more of the rolling prevention measures for the balloon 70 shown in FIGS. 3 and 14 to 16 may be used in combination.

Another embodiment of the method for repairing the air conditioner will be shown below with reference to FIG. 17 .

Figure 17 shows an air conditioner installed in the machine room and connected to the air supply duct in the ceiling of the room with the indoor facilities via the main supply air duct in either the machine room or the room with the indoor facilities. An example of an air conditioner is shown. In addition, in the embodiment shown in FIG. 17, the same reference numerals are given to the same configurations as in the embodiment shown in FIGS. 1 to 13, and detailed description of the configurations will be omitted.

As shown in FIG. 17, the indoor facility 100 in which the air conditioner 200 is arranged has one air conditioning machine room 110 and one adjacent air conditioning room 130 (target room). Here, the air conditioner room 110 is a room in which two air conditioners 111 and 112 are installed, and the air conditioner room 130 is cooled by the air from the air conditioners 111 and 112 installed in the air conditioner room 110 ( It is a room where the temperature is controlled.

The air conditioning machine room 110 includes air conditioners 111 and 112, for example. The air conditioners 111, 112 are connected to the supply air main duct 115 via anti-backflow dampers intermediate the corresponding base ducts 111a, 112a as supply air delivery portions.

The air conditioner 111 is driven and controlled by a control device (not shown). Here, in the embodiment shown in FIG. 17, there are a mounted part (lower half of FIG. 17) where the heat generating equipment in the air conditioning room 130 is installed and a non-mounted part (upper half of FIG. 17) where the heat generating equipment is not installed. The air conditioner 112 is in charge of the unmounted part, and shows a situation in which it has already been installed in the air conditioning machine room 110 . The white air conditioners show the state in which air is sent out to handle the heat load of the mounted part, and the black air conditioners show the state in which air is not sent out to handle the unmounted part. there is FIG. 17 illustrates a case where the air from the air conditioner 111 shown in white is sent to the air supply main duct 115, and the air from the air conditioner 112 shown in black is not sent to the air supply main duct 115. . It should be noted that the switching of whether or not air is sent out by the air conditioners 111 and 112 should be made so that the air supply from the air conditioners to be driven does not flow back to the air conditioners that are not in operation and that the air conditioners 111 and 112 do not become unable to supply a predetermined air volume to the header duct. Backflow prevention and air supply are performed by opening/closing control of a damper (not shown) in the base duct of the outlet of the .

The air supply main duct 115, for example, joins the air sent out from either of the air conditioners 111, 112, for example, to the air supply ducts 140, 160, which are sub-main air supply ducts connected to the air supply main duct 115. It is a duct that sends out. The air supply main duct 115 has a large air volume in a facility with a high heat load such as a computer center. It's big.

The air-conditioned room 130 is, for example, a room in which electronic devices such as power supply devices and supercomputers are installed. It should be noted that the above-described power supply equipment and electronic equipment always operate. In the air-conditioned room 130, for example, an air supply duct 140 is arranged in the upper part of the room above the ceiling. The air supply duct 140 may be exposed in the case of a direct ceiling. The number of air supply ducts 140 is not limited to one, and may be two as shown in FIG. 17, or may be three or more.

The air supply duct 140 is connected via a short pipe that branches the air supply, and includes air control ports 141, 142, 143, 144, 145, 146, 147, and 148 that are installed on the ceiling surface or the virtual ceiling surface if the ceiling is straight. and supplies the air sent out from the air supply main duct 115 to each of the air control ports 141 , 142 , 143 , 144 , 145 , 146 , 147 , 148 . In addition, in FIG. 17 , reference numerals 141 , 142 , 143 and 144 and reference numerals 145 , 146 , 147 and 148 are attached to the air control openings provided in the air supply duct 140 from the left side in FIG. 17 .

The air control ports 141, 142, 143, 144, 145, 146, 147, and 148 are often register-type outlets in which a shutter is attached to a universal grill having parallel strip-shaped movable blades. It is, for example, an HS air valve that can adjust the direction and volume of the air blown out by (H) and the shutter (S). The air control openings 141, 142, 143, 144, 145, 146, 147, 148 are branched via short pipe ducts and are positioned on the lower surface of the air supply duct 140 and provided in a suspended form. Therefore, the air blown out from the air control ports 141, 142, 143, 144, 145, 146, 147, 148 is dispersed to some extent in the vertical direction from the top to the bottom of the air conditioning room 130 and blown out. Therefore, the air blown out from these air control ports 141, 142, 143, 144, 145, 146, 147, 148 is in the vicinity below these air control ports 141, 142, 143, 144, 145, 146, 147, 148. For example, heat load generating equipment such as power supply equipment disposed in is cooled. Here, in FIG. 17, the arrows pointing outward from four directions on the outer peripheral edge of the air control ports 141, 142, 143, 144, 145, 146, 147, and 148 indicate that the air flows downward in the air conditioning chamber 130. It shows that the air is dispersed and blown out to some extent from the vertical direction by the movable blades.

In the embodiment shown in FIG. 17, in the air conditioning equipment 200 for the indoor facility 100, repair work is performed to newly install the air volume adjustment damper 80 (see FIG. 4) in the new air supply duct 160 and the air supply main duct 115. I will explain on the premise. A new air supply duct 160 is newly installed at a position B indicated by a two-dot chain line in FIG. In addition, the air supply duct 160 in this case indicates a new air supply duct that can be installed in an easily installable place such as directly under the ceiling.

In addition, in the repair work of the embodiment shown in FIG. is fed through the air supply main duct 115 . Therefore, for example, when a duct is cut on the side of the air supply main duct 115 to install a damper such as the air volume adjustment damper 80, or when a newly installed air supply duct 160 is connected, leakage may occur from the cut opening. Due to the wind pressure of the air sent into the air supply main duct 115, the work inside the air supply main duct 115 cannot be performed.

Therefore, in the embodiment shown in FIG. 17, in the vicinity of the end of the air supply main duct 115 and at the scheduled branching portion at the base of the air supply main duct 115, in order to allow the work inside the air supply main duct 115 to be performed, A duct end face 161 with a lid installed is provided, and in the vicinity of the air control port 141 or the air control port 145, the branch downstream side of the air supply main duct 115 of the repair scheduled part is closed, and the air supply downstream of the repair scheduled part is closed. To prevent air from being sent into the main duct 115. - 特許庁As a method for closing the air supply main duct 115, in the embodiment shown in FIG. 17, for example, the folded balloon 70 is closed by the air control port 141 or the air control port in the same manner as in the embodiments shown in FIGS. After inserting into the downstream side of the branching air supply main duct 115 of the portion to be repaired through the opening from which the face of 145 and the inner shutter are removed, the balloon 70 is inflated in the air supply main duct 115 downstream of the portion to be repaired. Then, a method of closing the air supply main duct 115 downstream of the portion to be repaired by the inflated balloon 70 is adopted.

Of course, the repair work method in the embodiment shown in FIG. 17 also follows the procedure of the repair work method in the embodiment shown in FIGS. 1 to 13 .

That is, the process of curing the air terminals 141, 145 and the curing of the air terminals 142, 143, 144, 146, 147, 148 is performed according to step S1.

Further, the process of installing the balloon 70 on the branch downstream side of the portion to be repaired of the air supply main duct 115 follows the procedure of step S4. The operator crawls forward in the duct from either the air control port 141 or the air control port 145 to extend the tube 74 to the downstream side of the branch, while the operator moves the pump 73 from outside the air control port 141 or the air control port 145. A balloon 70 is installed so as to drive the .

Further, the process of connecting the air supply duct 160 branched to the downstream side of the branch of the air supply main duct 115 is performed according to step S5. On the side plate of the air supply main duct 115, there is a duct end surface 161 with a lid installed near the end of the air supply main duct 115 and at the base of the air supply main duct 115 to be repaired, and the lid is opened. , a new air supply duct 160 is connected.

Then, the process of installing the air volume adjusting damper 80 on the upstream side of the balloon blocking portion of the air supply main duct 115 may be performed according to step S9. On the other hand, the process of installing the air volume adjusting damper 88 on the downstream side of the balloon blocking portion of the air supply main duct 115 may be performed according to step S6.

After that, the process of removing the balloon 70 may be performed according to step S8.

As described above, the embodiment shown in FIG. 17 also has the same effect as the embodiment shown in FIGS. 1 to 13 .

17, one or more of the rolling prevention measures for the balloon 70 shown in FIGS. 3 and 14 to 16 may be used. As a result, even in the embodiment shown in FIG. 17, the same effect as the anti-rolling measures for the balloon 70 shown in FIGS. 3 and 14 to 16 can be obtained.

From the detailed description above, the features and advantages of the embodiments will become apparent. It is intended that the claims cover the features and advantages of such embodiments without departing from their spirit and scope. In addition, any improvements and modifications will readily occur to those skilled in the art. Accordingly, the scope of the inventive embodiments is not intended to be limited to that described above, but can be relied upon by suitable modifications and equivalents within the scope disclosed in the embodiments.

DESCRIPTION OF SYMBOLS 1... Indoor equipment; 2, 2'... Air conditioner; 10... Air-conditioning machine room; 11, 12, 13, 14... Air-conditioner; Room; 21, 22, 23, 24 Air conditioner; 21a, 22a, 23a, 24a Base duct; 25 Header duct; 30 Air conditioning room; , 43, 44... Air outlet; 45... Sectional damper; 50... Air supply duct; 50a, 50b... Duct portion; 60a... main duct; 60c, 60d... branch duct; 60e, 60f... rising duct; 61, 62, 63, 64... air terminal; Joint part; 73... Pump; 74... Tube (hose); 80... Air volume adjusting damper; 81... Damper; 82... Drive shaft; 110 air-conditioning machine room; 111, 112 air conditioner; 111a, 112a base duct; 115 air supply main duct; , 142, 143, 144, 145, 146, 147, 148 air control port; 160 air supply duct; 161 duct end face; 200 air conditioning equipment

Claims (23)

An existing air supply main duct installed in the ceiling of the target room and into which air whose temperature is controlled by an air conditioner is sent, and distributed on the ceiling of the target room and branched from the existing air supply main duct In a method for repairing an air conditioner comprising at least two air control ports for blowing out the air branched and supplied from an air supply duct,
Out of the at least two or more air control ports, the balloon is installed in the existing air control port from the air control port provided downstream of the air supply duct from the planned repair portion in which the cover is installed on the side surface of the existing air supply main duct. inserting inside the supply air main duct;
The balloon inserted inside the existing air supply main duct is inflated, and the existing air supply main duct is located downstream of the position where the balloon is inserted in the existing air supply main duct on the side of the portion to be repaired. occlude the
a step of repairing equipment in the existing air supply main duct on the downstream side of the portion to be repaired from the point blocked by the inflated balloon;
and a step of deflating the inflated balloon and then taking it out from the inserted air valve. In the method for repairing air conditioning equipment according to claim 1,
In the step of repairing the equipment, a flow rate adjustment for adjusting the flow rate of the air flowing through the existing air supply main duct downstream of the blockage portion of the existing air supply main duct on the side of the portion scheduled for repair. A method of repairing an air conditioner, comprising a step of installing a damper for air conditioning. In the method for repairing air conditioning equipment according to claim 1,
In the step of repairing the equipment, a flow rate adjustment for adjusting the flow rate of the air flowing through the existing air supply main duct upstream of the blockage portion of the existing air supply main duct on the side of the part scheduled for repair. A method of repairing an air conditioner, comprising a step of installing a damper for air conditioning. In the repair method for air conditioning equipment according to claim 3,
A method of repairing an air conditioner, wherein the flow rate adjusting damper has a form in which a plurality of dampers are combined. In the method for repairing air conditioning equipment according to any one of claims 1 to 4,
A method for renovating air conditioning equipment, wherein the step of renovating the equipment includes a step of installing a new air supply duct in a lid opening portion of the existing air supply main duct on the side of the portion to be refurbished. A header duct is provided outside the target room and into which air cooled by a first air conditioner is sent; A method for renovating an air conditioning facility comprising an existing air supply duct having at least one or more vents,
a step of inserting a balloon into the existing air supply duct from one of the at least one air control openings provided most downstream of the existing air supply duct;
a step of inflating the balloon inserted into the existing air supply duct to close the existing air supply duct downstream of the air terminal of the existing air supply duct into which the balloon is inserted;
a step of refurbishing the existing air supply duct downstream of a location blocked by the inflated balloon;
and a step of deflating the inflated balloon and then taking it out from the inserted air valve. In the method for repairing air conditioning equipment according to claim 6,
The step of repairing the facility includes installing a flow rate adjusting damper for adjusting the flow rate of the air flowing through the existing air supply duct downstream of the blocked portion of the existing air supply duct. A method for repairing an air conditioning system characterized by: In the method for repairing air conditioning equipment according to claim 6,
The header duct includes a first header duct to which air from the first air conditioner is sent, and one end of the existing air supply duct opposite to one end branched from the first header duct. a second header duct connected to the other end,
A method of repairing an air conditioning facility, wherein the repairing of the equipment includes connecting a new supply air duct between the first header duct and the second header duct. In the repair method for air conditioning equipment according to claim 8,
A method for renovating air conditioning equipment, wherein the step of renovating the equipment includes a step of installing a branch duct for connecting the new supply air duct to the second header duct. In the method for repairing air conditioning equipment according to claim 9,
The step of repairing the equipment includes the step of installing a flow rate adjusting damper for adjusting the flow rate of the air flowing through the new air supply duct in the branch duct. How to refurbish. In the repair method for air conditioning equipment according to claim 10,
a step of closing the flow rate adjusting damper installed in the branching duct, which is performed before the step of removing the balloon from the air control port into which the balloon is inserted;
Flow rate adjustment, which is performed after the step of removing the balloon from the air control port into which the balloon is inserted, and adjusts the flow rate of the air flowing in the existing air supply duct downstream of the air control port in the existing air supply duct and a step of installing a damper for air conditioning. In the method for repairing air conditioning equipment according to claim 10 or claim 11,
A method of repairing an air conditioner, wherein the flow rate adjusting damper has a form in which a plurality of dampers are combined. In the method for repairing air conditioning equipment according to any one of claims 8 to 12,
The existing air supply duct has a partition damper provided at least between adjacent air terminals among the air terminals having at least one air terminal and partitioning the inside of the existing air supply duct when closed. A method for repairing air conditioning equipment. In the method for repairing air conditioning equipment according to claim 13,
A method for repairing an air conditioning system, further comprising: opening the section damper to send air from the first header duct to a blocked portion of the existing supply air duct. In the method for repairing air conditioning equipment according to claim 13 or claim 14,
A method for repairing air conditioning equipment, wherein the first air conditioner includes an air conditioner that is driven to send the air into the first header duct at least when the division damper is blocked. In the method for repairing air conditioning equipment according to any one of claims 13 to 15,
a second air conditioner for sending cooled air to the second header duct;
The second air conditioner is stopped when the balloon is inserted into the existing air supply duct from an air terminal provided at the most downstream side of the existing air supply duct. How to refurbish. In the method for repairing air conditioning equipment according to claim 16,
The method of repairing air conditioning equipment, wherein the second air conditioner includes an air conditioner that is driven to send the air into the second header duct at least when the division damper is blocked. In the method for repairing air conditioning equipment according to claim 16 or claim 17,
Among the first air conditioner and the second air conditioner, the number of air conditioners driven when the section damper is closed, and among the air conditioners connected to the first header duct, the opening of the section damper A method for repairing an air conditioner, characterized in that the number of air conditioners that are driven at times is the same. In the method for repairing air conditioning equipment according to any one of claims 1 to 18,
The balloon is characterized in that, when the balloon is inflated, traction members are arranged at a plurality of locations on two inner surfaces perpendicular to the extending direction of the existing air supply main duct or the existing air supply duct. How to refurbish air conditioning equipment. In the method for repairing air conditioning equipment according to any one of claims 1 to 19,
The balloon has a joint portion into which compressed air is injected at a central portion of an outer surface perpendicular to an extension direction of the existing air supply main duct or the existing air supply duct when the balloon is inflated. How to refurbish air conditioning equipment. In the method for repairing air conditioning equipment according to claim 20,
A method for repairing an air conditioner, wherein the balloon is connected to a tube for injecting compressed air via mooring ropes at four corners of the outer surface where the joint portion is provided. In the method for repairing air conditioning equipment according to any one of claims 1 to 21,
A method for repairing an air conditioner, wherein the balloon is arranged upstream of an existing air supply main duct or a reinforcing rod arranged inside the existing air supply duct. In the method for repairing air conditioning equipment according to any one of claims 1 to 22,
A method for repairing air conditioning equipment, wherein the balloon is arranged upstream of a pipe that penetrates a cross section of a sleeve of an existing air supply main duct or an existing air supply duct.

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