Method for installing air conditioning system in high-ceiling warehouse

Abstract

To provide a method for installing an air conditioning system in a high-ceiling warehouse without the need for scaffolding for air volume adjustment work.SOLUTION: A method for installing an air conditioning system in a high-ceiling warehouse includes: installing scaffolding for installation work on a floor surface of the high-ceiling warehouse; installing an air conditioning duct with both a vertical section and a horizontal section using the scaffolding for the installation work and inserting a plurality of outlet nozzles individually into a plurality of penetration holes provided on a lower wall of the horizontal section; and removing the scaffolding for the installation work after inserting the plurality of outlet nozzles and before installing a plurality of multi-stage racks. The method eliminates the need for scaffolding for air volume adjustment work by eliminating the need for air volume adjustment of the plurality of outlet nozzles after installing the plurality of multi-stage racks.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a method for installing an air conditioning system in a high-ceiling warehouse where goods are stored within a predetermined temperature range, and more particularly to a system suitable for air conditioning in a high-ceiling automated warehouse where multi-tiered racks for storing goods are installed. [Background technology]

[0002] 10, a conventional air conditioning system 100 for a high-ceiling automated warehouse Wh includes an air conditioner 2 installed on the floor Fl, an air conditioning duct 30 having a rising section 31 that rises from the air conditioner 2 to the vicinity of the ceiling Ce and a horizontal section 32 that extends horizontally from the top of the rising section 31 along the underside of the ceiling Ce, and a plurality of air outlets 41 provided in a plurality of short ducts 321 that branch off from the horizontal section 32 of the air conditioning duct 30 and are connected via volume dampers VD. The volume damper VD is, for example, a volume damper installed as an air volume adjustment damper midway through a rectangular duct, as disclosed in Patent Document 1 below, and the air outlet 41 is, for example, a volume damper with a shutter attached to a grill for adjusting the air direction (a so-called VHS grill register type air outlet), as disclosed in Patent Document 2 below. As a transport means for automatically transporting articles (including delivery of articles to and from the multi-tiered racks 51 to 54) in the high-ceiling automated warehouse Wh, a stacker crane 6 (see, for example, Patent Document 3) is used. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Utility Model Registration No. 2584735 [Patent Document 2] Patent No. 3311272 [Patent Document 3] Patent No. 5169211 Summary of the Invention [Problem to be solved by the invention]

[0004] When the conventional air conditioning system 100 is installed in a high-ceiling automated warehouse Wh, the air conditioning duct 30 and the air outlets 41 are installed before the multi-tiered racks 51-54 are installed. As described above, when the height from the floor Fl to the horizontal section 32 of the air conditioning duct 30 exceeds 10 meters, the installation work is generally performed using scaffolding rather than a high-altitude work vehicle. Because the scaffolding used for installation hinders the delivery and installation of the multi-tiered racks 51-54, it is dismantled and removed once the installation of the air conditioning duct 30 and the air outlets 41 is complete. The multi-tiered racks 51-54 are then installed, and after the racks 51-54 are installed, the stacker crane 6 serving as the transport equipment must be delivered and installed. Subsequently, the electrical work involves the installation of a power panel and wiring. Once the air conditioners 2 installed on the floor Fl are energized, the air volume is adjusted by adjusting the damper opening of the volume dampers VD in the branch ducts of each air outlet 41. When adjusting the airflow rate, scaffolding similar to that used for installation work must be set up. Thus, in the above-described conventional example, scaffolding must be set up twice, once for installation work and once for airflow rate adjustment, resulting in increased costs. Furthermore, when the flow velocity of the air (downward flow) blown out from the VHS or HS grill register type air outlet 41 is within a range of face velocities considered appropriate, even if the airflow rate of the built-in fan of the air conditioner 2 is increased and the volume damper VD is opened to adjust the airflow direction at each air outlet 41 so that the airflow rate reaches the maximum airflow rate within the face velocity range, the blowout dynamic pressure disappears at a level about 5 m above the floor Fl, even directly below the air outlet, making it difficult to move the air near the floor Fl (air stagnation occurs near the floor Fl). Furthermore, adjusting the air volume between the multiple air outlets 41 that branch into many branches midway along the horizontal section 32 of the horizontally extending air conditioning duct 30 and are connected via volume dampers VD does not create much of a pressure difference at the air outlets 41 because the air outlets 41 are registers with large openings and sparse blades. Therefore, it is difficult to resolve the poor static pressure distribution within the air conditioning duct 30 with just the volume dampers VD, resulting in poor distribution. To balance air volume and cost, these air outlets 41 are installed at large intervals of approximately one every 5 meters, resulting in a point-like distribution of air. As a result, the temperature difference between the ceiling Ce and floor Fl of the high-ceiling automated warehouse Wh becomes large, ultimately worsening the vertical temperature distribution within the high-ceiling automated warehouse Wh.In order to improve the temperature distribution in the vertical direction (Z-axis direction), a vertical section 33 is provided that extends from the downstream end (the right end in Figure 10(b)) of the horizontal section 32 of the air conditioning duct 30 to the vicinity of the floor surface Fl, and an air outlet 42 is provided that blows air from the lower end of the vertical section 33 to the vicinity of the floor surface Fl, but this results in a further increase in costs.

[0005] The present invention has been made to solve the above-mentioned problems, and aims to provide a method for installing an air conditioning system in a high-ceiling warehouse that does not require the installation of scaffolding for air volume adjustment work. [Means for solving the problem]

[0006] The present invention relates to a method for installing an air conditioning system in a high-ceiling warehouse where multiple multi-tiered racks are installed. The air conditioning system includes an air conditioner installed on the floor of the high-ceiling warehouse, an air conditioning duct having an upright section extending from the air conditioner to the ceiling and a horizontal section extending horizontally from the top of the upright section along the ceiling, a plurality of through-holes provided in the lower wall of the horizontal section at predetermined intervals in the longitudinal direction of the horizontal section, and a plurality of blow-out nozzles inserted into the plurality of through-holes. A method for installing an air conditioning system in a high-ceiling warehouse includes: setting up a scaffolding for installation work on the floor of the high-ceiling warehouse; using the scaffolding to install the rising section and the horizontal section and inserting the blow-out nozzles into the holes provided in the horizontal section; and removing the scaffolding after inserting the blow-out nozzles and before installing the multi-tiered racks. This eliminates the need to adjust the airflow volume of the blow-out nozzles after installing the multi-tiered racks, thereby eliminating the need for scaffolding for airflow volume adjustment work. Note that, in this invention, inserting the blow-out nozzles into the holes means that the upper end of the blow-out nozzle is positioned inside the horizontal section, rather than flush with the lower wall of the horizontal section. A high-ceiling warehouse refers to a warehouse with a floor-to-ceiling height of 10 meters or more.

[0007] In the present invention, the upper end of each blowout nozzle is inserted up to the center in the vertical direction of the horizontal portion.

[0008] In the present invention, the high-ceiling warehouse is a warehouse with a height from the floor to the ceiling of 10 m or more. [Effects of the Invention]

[0009] According to the present invention, multiple blowout nozzles are inserted into the horizontal section of the air conditioning duct, and the upper ends of the blowout nozzles are positioned inside the horizontal section of the duct. This allows the static pressure of the central air, which has a large dynamic pressure component, to be re-acquired, allowing air to be blown downward from each blowout nozzle at a uniform high speed regardless of the position of each blowout nozzle. The air blown out from each blowout nozzle attracts the surrounding air, creating a large-volume downward airflow with a uniform velocity distribution in the horizontal plane. While the flow velocity of the downward airflow gradually decreases as it approaches the floor, the air still moves at a gentle breeze near the floor. This improves the temperature distribution in the vertical direction and horizontally along the extension of the air conditioning duct in a high-ceiling warehouse. Furthermore, because air volume adjustment for each blowout nozzle is not required regardless of the operation of the air conditioner, there is no need to install scaffolding for air volume adjustment work. Furthermore, since there is no need to install separate air conditioning duct drop sections or air outlets near the floor, scaffolding for installation work only needs to be set up once, which in turn helps to reduce costs. [Brief explanation of the drawings]

[0010] [Figure 1] 1(a) is a plan view of an air conditioning system for a high-ceiling warehouse according to an embodiment, (b) is a cross-sectional view taken along line Ib-Ib in FIG. 1(a), and (c) is a cross-sectional view taken along line Ic-Ic in FIG. 1(a). [Figure 2] 10(a) shows the simulation results showing the flow velocity distribution in the XZ plane in this embodiment, and FIG. 10(b) shows the simulation results showing the gas flow velocity distribution in the XZ plane in a conventional example. [Figure 3] 10(a) shows the simulation results showing the flow velocity distribution in the YZ plane in this embodiment, and FIG. 10(b) shows the simulation results showing the gas flow velocity distribution in the YZ plane in a conventional example. [Figure 4](a) is a simulation result showing the flow velocity distribution in the XY plane at a height of 20 m in this embodiment, and (b) is a simulation result showing the flow velocity distribution in the XY plane at a height of 20 m in a conventional example. [Figure 5] (a) is a simulation result showing the flow velocity distribution in the XY plane at a height of 10 m in this embodiment, and (b) is a simulation result showing the flow velocity distribution in the XY plane at a height of 10 m in a conventional example. [Figure 6] 10(a) shows the simulation results showing the temperature distribution in the XZ plane in this embodiment, and FIG. 10(b) shows the simulation results showing the temperature distribution in the XZ plane in the conventional example. [Figure 7] 10(a) shows the simulation results showing the temperature distribution in the YZ plane in this embodiment, and FIG. 10(b) shows the simulation results showing the temperature distribution in the YZ plane in the conventional example. [Figure 8] 10(a) is a simulation result showing the temperature distribution in the XY plane at a height of 20 m in this embodiment, and FIG. 10(b) is a simulation result showing the temperature distribution in the XY plane at a height of 20 m in a conventional example. [Figure 9] 10(a) is a simulation result showing the temperature distribution in the XY plane at a height of 10 m in this embodiment, and FIG. 10(b) is a simulation result showing the temperature distribution in the XY plane at a height of 10 m in a conventional example. [Figure 10] 10(a) is a plan view of an air conditioning system for a conventional high-ceiling warehouse, (b) is a cross-sectional view taken along Xb-Xb in FIG. 10(a), and (c) is a cross-sectional view taken along Xc-Xc in FIG. 10(a). DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments will be described with reference to the drawings. Common or corresponding elements in each drawing are designated by the same reference numerals, and descriptions thereof will be simplified or omitted. In each drawing, illustration of some components may be omitted for convenience of drawing.

[0012] Fig. 1(a) is a plan view of an air conditioning system 1 for a high-ceiling automated warehouse Wh according to an embodiment, Fig. 1(b) is a cross-sectional view taken along the line Ib-Ib of Fig. 1(a), and Fig. 1(c) is a cross-sectional view taken along the line Ic-Ic of Fig. 1(a). In this embodiment, the longitudinal direction of a horizontal section 32 of an air conditioning duct 3 (described later) is defined as the X-axis direction, the vertical direction as the Z-axis direction, and the direction in which multi-tiered racks 51 to 54 (described later) are arranged side by side, which is perpendicular to the X-axis direction and the Z-axis direction, is defined as the Y-axis direction.

[0013] The air conditioning system 1 comprises three air conditioners 2 installed on the floor Fl of the high-ceiling automated warehouse Wh, three air conditioning ducts 3 connected to each air conditioner 2, and a plurality of air outlets 4 provided in the horizontal section 32 of each air conditioning duct 3, which will be described later.

[0014] The air conditioner 2 is configured to cool or heat (heat in this embodiment) the return air that is drawn from the high-ceiling automated warehouse Wh through an air intake port (not shown), and send the heated air to the air conditioning duct 3. As the air conditioner 2, for example, a known air conditioner equipped with a cooling coil and a hot water coil can be used, and therefore further explanation is omitted. Furthermore, the air conditioning duct 3 can be selected with a pressure loss of, for example, about 0.2 mmAq / m, and in that case, for an air conditioner 2 with an air volume of, for example, 8,000 CMH, an air conditioning duct with cross-sectional dimensions of about 700 mm x 500 mm can be used, and therefore further explanation is omitted.

[0015] The air conditioning duct 3 has a rising section 31 that rises from the air conditioner 2 to a predetermined height near the ceiling Ce, and a horizontal section 32 that extends horizontally in the X-axis direction from the top of the rising section 31 along the underside of the ceiling Ce. The lower wall 32a of the horizontal section 32 has multiple through-holes 32b evenly spaced along the X-axis. A plate-shaped fixing member 34 with a larger area than the through-holes 32b is attached to each through-hole 32b from below using adhesive, welding, or other methods. The fixing member 34 has a central through-hole 34a with a threaded groove corresponding to the threads on the tubular section 4a of the blowout nozzle 4 (described below). While the blowout nozzle 4 can be easily adjusted and attached if the tubular section 4a has threads and the through-hole 34a has a threaded groove, other fixing methods may be used as long as a certain insertion distance is ensured. In this embodiment, the horizontal section 32 is formed so that its cross-sectional area gradually decreases toward the downstream side, but it may also be formed with a constant cross-sectional area. In addition, in this embodiment, three air conditioners 2 are provided corresponding to the three air conditioning ducts 3, but one air conditioner 2 may be used for three air conditioning ducts 3. In this case, the air conditioner 2 can be configured so that the rising section 31 rising from the air conditioner 2 branches into three horizontal sections 32 from the top.

[0016] In this embodiment, multiple blowout nozzles 4 are inserted into the horizontal section 32. Each blowout nozzle 4 is composed of a cylindrical tube section 4a and a blowout section 4b that is integrally formed at the lower end of the tube section 4a and extends with a constant diameter. The opening diameter Dn at the lower end of the blowout section 4b can be set within a range of 65 mm to 150 mm. This allows air to be blown out from the blowout nozzle 4 at high speed. If the opening diameter Dn is smaller than 65 mm, the number of blowout nozzles 4 needs to be significantly increased, while if the opening diameter Dn is larger than 150 mm, air may not be blown out at high speed. A screw thread is formed on the outer surface of the tube section 4a to correspond to (screw into) the thread groove of the through-hole 34a. When the blowout nozzle 4 is rotated with the tube section 4a facing upward and in contact with the through-hole 34a, the blowout nozzle 4 is inserted into the horizontal section 32. However, other types of fastening may be used as long as a certain insertion allowance can be ensured. That is, the upper ends of the blowout nozzles 4 are not flush with the lower wall 32a of the horizontal section 32 but are located inside the horizontal section 32. Because the upper ends of the blowout nozzles 4 are located inside the horizontal section 32, the static pressure of the air flowing through the horizontal section 32 near the center, where the air has a large dynamic pressure component, is gradually regained. This allows air to be blown downward from each blowout nozzle 4 at a uniform high speed regardless of the position of each blowout nozzle 4. The insertion length Ln of the tubular section 4a is set so that the upper end of the tubular section 4a is positioned so that it is not affected by a decrease in flow velocity due to frictional resistance on the inner surface of the horizontal section 32. It is not necessary to strictly match the insertion lengths Ln of the blowout nozzles 4. Even if the insertion lengths Ln are slightly different, the flow velocity of the air blown from each blowout nozzle 4 will be almost the same as long as the upper ends are inserted near the center of the horizontal section 32. The spacing Sn between adjacent blowout nozzles 4 is preferably set within the range of 500 mm to 1,000 mm. This, in combination with setting the opening diameter Dn of the blowout portion 4b within the above range, ensures the induction effect described below. If the spacing Sn is greater than 1,000 mm, the induction effect will be reduced and it may not be possible to generate a large volume of downward airflow. On the other hand, if the spacing Sn is less than 500 mm, the number of blowout nozzles 4 will be excessive. Furthermore, if the horizontal portion 32 is relatively thick and is made of a relatively hard material such as stainless steel, a thread groove may be cut directly into the through-hole 32b.In this case, the number of parts can be reduced because the fixing member 34 can be omitted, which is advantageous. However, other types of fixing may be used as long as a certain insertion margin can be ensured.

[0017] In the high-ceiling automated warehouse Wh, multiple (four in this embodiment) multi-tiered racks 51-54 are arranged side by side, with intervals in the Y-axis direction. Each of the multi-tiered racks 51-54 stores items (not shown). In this embodiment, the gap S2 between two adjacent multi-tiered racks 52, 53 on the inside in the Y-axis direction is set smaller than the gaps S1, S3 between the multi-tiered racks 52, 53 and their respective adjacent multi-tiered racks 51, 54 on the outside in the Y-axis direction. A horizontal section 32 is disposed above these gaps S1, S2, S3 in the Z-axis direction. Thus, multiple blowout nozzles 4 are disposed above and along the gaps S1, S2, S3. Arranging the blowout nozzles 4 in this manner ensures a space that allows the air blown out from each blowout nozzle 4, and thus a downward airflow (described later), to reach the floor surface Fl and facilitates entry into the multi-tiered racks 51-54. Additionally, two rows of stacker cranes 6 are installed outside the multi-tier racks 51, 54 in the Y-axis direction to move articles in and out of the shelf storage sections of the multi-tier racks 51 to 54. The stacker cranes 6 perform automatic transport of articles within the high-ceiling automated warehouse Wh (including delivery of articles to and from the multi-tier racks 51 to 54), and are driven and controlled by a computer (not shown). As known multi-tier racks 51 to 54 and stacker cranes 6 can be used, further explanation will be omitted.

[0018] According to this embodiment, multiple blowout nozzles 4 are inserted into the horizontal section 32 of the air-conditioning duct 3, so that air flowing through the horizontal section 32 is blown downward from each blowout nozzle 4 at high speed. The air blown out from each blowout nozzle 4 attracts the surrounding air, creating a large-volume, downward airflow with a uniform flow velocity in the horizontal plane (XY plane). Although the flow velocity of the downward airflow gradually decreases as it approaches the floor surface Fl, it still reaches the floor surface Fl. This prevents air from stagnating near the floor surface Fl, improving the temperature distribution in the vertical direction (Z-axis direction) and the horizontal plane in the air-conditioning duct extension direction (X-axis direction) within the high-ceiling automated warehouse Wh. Furthermore, because there is no need to adjust the airflow volume of the blowout nozzles 4 (adjusting the insertion length Ln), there is no need to install scaffolding for airflow volume adjustment work. Furthermore, since there is no need to separately provide the vertical section 33 of the air conditioning duct 30 or the air outlet 42 near the floor surface Fl as in the above-mentioned conventional example, it is possible to reduce costs, as it is only necessary to set up scaffolding for installation work once.

[0019] In this embodiment, a simulation was performed under the following conditions to confirm the vertical temperature distribution within the high-ceiling automated warehouse Wh. Specifically, the distance from the floor Fl to the ceiling Ce was 24,000 mm (24 m), the duct dimensions (each side in cross section) of the air-conditioning duct 3 were 700 mm x 500 mm, the opening diameter Dn of the outlet nozzle 4 was 80 mm, the spacing Sn was 700 mm, and the insertion length Ln was 100 mm. Furthermore, in a conventional example compared with this embodiment, the simulation conditions were the same as those of the embodiment, except that, as shown in FIG. 10, VHS grill register-type outlets 41 were used, the spacing between the outlets 41 was 5,000 mm, and the descending portion 33 and the outlet 42 were separately provided.

[0020] In this embodiment, referring to FIGS. 2(a) and 3(a), the flow velocity of the air blown out from each blowout nozzle 4 was 4.5 m / s, but the wind speed of the downdraft airflow at a plane 1,500 mm below the blowout nozzle 4 was confirmed to be high at 0.25 m / s. Referring also to FIG. 4(a), it was confirmed that the airflow blown out from each blowout nozzle 4 attracts the surrounding air, forming a downward airflow with a large air volume and a uniform flow velocity distribution in the XY plane. Referring also to FIG. 5(a), it was found that the flow velocity of the downward airflow gradually decreases as it approaches the floor surface Fl, but the air moves at a gentle breeze even near the floor surface Fl. Furthermore, as clearly shown in FIGS. 3(a) and 4(a), it was also confirmed that air entered the interior of the multi-tiered racks 51-54. This is presumably due to the attraction effect, which forms a downward airflow with a large air volume and a uniform flow velocity distribution in the XY plane.

[0021] In this embodiment, as the downward airflow reaches the floor Fl as described above, the temperature near the ceiling Ce of the high-ceiling warehouse Wh is about 19°C, the temperature at the center of the high-ceiling warehouse Wh is about 17.5°C, and the temperature near the floor Fl is about 16.5°C, as shown in Figures 6(a) and 7(a). As a result, it was confirmed that the vertical temperature distribution within the high-ceiling warehouse Wh is improved compared to the conventional example described below. Furthermore, as shown in Figures 8(a) and 9(a), it was confirmed that the temperature distribution within the XY plane at heights of 20 m and 10 m is also improved. This is presumably due to air entering the interior of the multi-tiered racks 51-54.

[0022] In contrast, in the conventional example, referring to Figures 2(b) and 3(b), the flow velocity of the air blown out from each outlet 41 was as high as 0.25 m / s directly below while maintaining its dynamic pressure, but the flow velocity of the surrounding air was low at less than 0.10 m / s. Because the blown air velocity was low, it was confirmed that there was almost no force to attract the surrounding air. This indicated that the air-attracting effect of the present embodiment was not achieved, and the downward airflow did not produce a large volume. Referring also to Figures 4(b) and 5(b), it was confirmed that the flow velocity distribution of the downward airflow in the XY plane was uneven, and the flow velocity rapidly decreased as it approached the floor surface Fl. Therefore, although not shown in the figure, it was found that the downward airflow would not reach the floor surface Fl unless a separate downdraft section 33 and outlet 42 were provided. The high flow velocity near the floor surface Fl in Figure 2(b) is due to the air being blown out from the outlet 42 near the floor surface Fl. 3(b) and 4(b), it was confirmed that less air entered the interior of the multi-tiered racks 51 to 54 than in the embodiment. This is presumably because the flow velocity is locally high directly below each air outlet 41, and the flow velocity distribution in the XY plane is non-uniform.

[0023] In the conventional example, even though the vertical section 33 and the air outlet 42 were separately provided, as shown in Figures 6(b) and 7(b), the temperature directly below the air outlet 42 near the ceiling Ce of the high-ceiling warehouse Wh was as high as approximately 22°C, but at the center level of the high-ceiling warehouse Wh it was 16.8°C and near the floor Fl it was approximately 15.5°C, confirming that the temperature distribution in the vertical direction was worse than that of the embodiment. Furthermore, as shown in Figures 8(b) and 9(b), it was confirmed that the temperature distribution in the XY plane at heights of 20 m and 10 m was also worse than that of the embodiment. This is presumably because less air enters the multi-tiered racks 51-54 than in the embodiment.

[0024] Although the present embodiment has been described using the example of heating operation, it can also be applied to cooling operation. It has been confirmed that the vertical temperature distribution inside the high-ceiling automated warehouse Wh is improved even in cooling operation.

[0025] Furthermore, in this embodiment, the example has been described in which the present invention is applied to a high-ceiling automated warehouse Wh equipped with a stacker crane 6 that automatically transports goods, but the present invention does not necessarily have to be equipped with a stacker crane 6, and can be widely applied to high-ceiling warehouses where the height from the floor Fl to the ceiling Ce is 10 m or more. [Explanation of symbols]

[0026] Wh High-ceiling automated warehouse (high-ceiling warehouse), Fl Floor, Ce Ceiling, 1 Air conditioning system, 2 Air conditioner, 3 Air conditioning duct, 31 Rising section, 32 Horizontal section, 32a Lower wall, 32b Through hole, 4 Air outlet nozzle, 51, 52, 53, 54 Multi-tier rack

Claims

1. A method for installing an air conditioning system in a high-ceiling warehouse in which a plurality of multi-tiered racks are installed, comprising the steps of: The air conditioning system comprises an air conditioner installed on the floor of the high-ceiling warehouse, an air conditioning duct having an upright section that rises from the air conditioner to the ceiling and a horizontal section that extends horizontally from the top of the upright section along the ceiling, a plurality of through-holes provided at predetermined intervals in the longitudinal direction of the horizontal section on the lower wall of the horizontal section, and a plurality of blow-out nozzles that are inserted into the plurality of through-holes, Installing scaffolding for installation work on the floor of the high-ceiling warehouse; Using the scaffolding for the installation work, the rising portion and the horizontal portion are installed, and the plurality of blow-out nozzles are inserted into the plurality of through holes provided in the horizontal portion, respectively; After inserting the plurality of blowout nozzles, removing the scaffolding for the installation work before installing the plurality of multi-tiered racks; Including, A method for installing an air conditioning system in a high-ceiling warehouse, characterized in that after the multiple multi-tiered racks are installed, it is not necessary to adjust the air volume of the multiple blow-out nozzles, thereby eliminating the need to install scaffolding for air volume adjustment work.

2. The method for installing an air conditioning system in a high-ceiling warehouse according to claim 1, A method for installing an air conditioning system in a high-ceiling warehouse, characterized in that the upper end of each blow-out nozzle is inserted up to the center of the horizontal portion in the vertical direction.

3. The method for installing an air conditioning system in a high-ceiling warehouse according to claim 1 or 2, A method for installing an air conditioning system in a high-ceiling warehouse, wherein the high-ceiling warehouse is a warehouse having a height from the floor to the ceiling of 10 m or more.

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