Air conditioning duct

Abstract

The purpose of the present invention is to provide an air conditioning duct capable of efficiently supplying air of a predetermined temperature by means of an air conditioner to an indoor space of a building. This air conditioning duct 1, which is arranged in an indoor space R of a building and formed of a flexible sheet material, comprises: a first duct 10 arranged inside in a manner extending along an air blowing direction; and a second duct arranged outside a periphery of the first duct 10 in a manner extending along the air blowing direction. The first duct 10 is provided with a first inflow port 11 into which air of a predetermined temperature from an air conditioner 100 flows, and a first discharge port 12 for discharging air in the first duct 10 to the indoor space R. The second duct 20 is provided with a second inflow port 21 into which air of a predetermined temperature from the air conditioner 100 flows, and a second discharge port 22 for discharging air in the second duct 20 to the indoor space R.

Description

air conditioning ducts

[0001] The present invention relates to an air conditioning duct that is arranged in the interior space of a building and is made of a flexible sheet material.

[0002] Conventionally, air conditioning ducts are installed in indoor spaces of buildings such as gymnasiums, evacuation shelters, temporary tents, and huts during disasters, emergencies, events, etc. These air conditioning ducts are made of flexible sheet material, and air blown out from an air conditioner flows in from a base end, flows through the duct, and is then discharged from the periphery of the duct. This allows air to be supplied not only to locations in the indoor space near the air conditioner, but also to various locations, including locations far from the air conditioner (see, for example, Patent Documents 1 to 3).

[0003] Japanese Patent Application Laid-Open No. 2021-148345 Japanese Patent Application Laid-Open No. 8-294339 Japanese Utility Model Application Laid-Open No. 62-43231

[0004] However, while conventional air conditioning ducts are fine for the purpose of simply supplying room-temperature air to the indoor space of a building, when supplying air of a specified temperature, such as cold or warm air blown out from an air conditioner, to an indoor space, the air at the specified temperature absorbs heat from or radiates heat to the indoor space as it flows through the duct, and when it is discharged from the peripheral surface of the tip or center of the duct, it becomes the same temperature as or close to the temperature of the indoor space, making it difficult to efficiently supply air at the specified temperature from the air conditioner to the indoor space of a building.

[0005] The present invention has been made in consideration of the above-mentioned problems, and aims to provide an air conditioning duct that can efficiently supply air at a predetermined temperature generated by an air conditioner to the indoor space of a building.

[0006] In order to achieve the above-mentioned object, the present invention provides an air conditioning duct that is placed in the indoor space of a building and is made of a flexible sheet material, and that includes a first duct that is placed on the inside and extends along the air blowing direction, and a second duct that is placed on the outside around the first duct and extends along the air blowing direction, wherein the first duct has a first inlet through which air of a predetermined temperature flows in from an air conditioner and a first outlet through which the air in the first duct is discharged into the indoor space of the building, and is configured to expand into a cylindrical shape due to the air flowing through the first duct, and the second duct has a second inlet through which air of a predetermined temperature flows in from the air conditioner, and is configured to expand into a cylindrical shape due to the air flowing through the second duct.

[0007] In this way, the air layer in the first duct is surrounded by the air layer in the second duct, creating an insulated state, so that air at a predetermined temperature that flows into the first duct from the air conditioner passes through the first duct while roughly maintaining the predetermined temperature, and is then discharged into the indoor space from the first outlet. This allows air at the predetermined temperature from the air conditioner to be efficiently supplied to the indoor space of the building.

[0008] The first duct may be provided on its circumferential surface with the first outlets radially penetrating the second duct, thereby allowing air at a predetermined temperature inside the first duct to be radially discharged from one or more outlets on the circumferential surface of the first duct toward the interior space of the building.

[0009] The second duct may be provided with a second outlet that discharges the air in the second duct into the indoor space of the building. In this way, the air that has flowed into the second duct can also be discharged from the second outlet into the indoor space of the building.

[0010] Furthermore, the first duct and the second duct may be provided such that the second outlet is relatively closer to the air conditioner than the first outlet, whereby the air at a predetermined temperature that has flowed into the second duct is discharged from the second outlet while maintaining substantially the same temperature as when it was blown out from the air conditioner, thereby more efficiently supplying air at a predetermined temperature from the air conditioner to the indoor space of the building.

[0011] The first duct and / or the second duct may be provided with an openable / closable fastener at the end opposite the air conditioner to allow air to escape from the duct. By opening the fastener within a predetermined range, the air in the air conditioning duct can be released into the indoor space of the building, making it possible to adjust the expansion of the air conditioning duct and prevent condensation.

[0012] Furthermore, the first duct and / or the second duct may be provided with a wire member around the periphery of the first inlet and / or the second inlet, which allows the first duct and the second duct of the air conditioning duct to be easily and reliably connected to the air outlet or adapter of the air conditioner.

[0013] The air conditioner may further include a cylindrical third duct arranged outside the periphery of the second duct along the air blowing direction, the third duct having an intake port for drawing in air from the indoor space of the building and an exhaust port for discharging the air in the third duct to the air conditioner, and expanding into a cylindrical shape due to the air flowing through the third duct. In this way, heat exchange occurs between the air from the indoor space flowing in the reverse direction through the third duct and the air from the air conditioner flowing in the forward direction through the second duct, thereby reducing the temperature difference between the air drawn into the air conditioner from the third duct and the air blown out from the air conditioner to the first duct and the second duct, thereby enabling efficient heat exchange of air in the air conditioner.

[0014] The present invention also provides an air conditioner set comprising the above-described air conditioning duct and an air conditioner.

[0015] According to the present invention, the air layer in the first duct is surrounded by the air layer in the second duct, creating an insulated state, so that air at a predetermined temperature that flows into the first duct from the air conditioner passes through the first duct while roughly maintaining the predetermined temperature, and is then discharged into the indoor space from the first outlet port. As a result, air at the predetermined temperature generated by the air conditioner can be efficiently supplied to the indoor space of the building.

[0016] This makes it possible to easily install air conditioning ducts in the indoor spaces of buildings such as gymnasiums, evacuation shelters, and temporary tents during disasters, emergencies, or events, and to create comfortable indoor spaces even on hot or cold days.

[0017] FIG. 1 is a diagram showing a state in which an air conditioning duct according to a first embodiment of the present invention is installed in an indoor space. FIG. 2 is a perspective view showing the air conditioning duct and air conditioner of FIG. 1. FIG. 3 is a side cross-sectional view showing the air conditioning duct of FIG. 2. FIG. 4 is a plan cross-sectional view showing the air conditioning duct of FIG. 4. (a) is a cross-sectional view taken along the arrows A-A, and (b) is a cross-sectional view taken along the arrows B-B of the air conditioning duct of FIG. 4. FIG. 5 is a side cross-sectional view showing an air conditioning duct according to a second embodiment of the present invention. FIG. 6 is a plan cross-sectional view showing the air conditioning duct of FIG. 6. FIG. 7 is a cross-sectional view taken along the arrows C-C of the air conditioning duct of FIG. 7. FIG. 8 is a cross-sectional view taken along the arrows D-D of the air conditioning duct of FIG. 7.

[0018] <First Embodiment> Next, a first embodiment of an air conditioning duct 1 according to the present invention will be described with reference to FIGS. 1 to 5. FIG.

[0019] 1, this air conditioning duct 1 is installed in an interior space R of a building such as a gymnasium, evacuation shelter, temporary tent, or hut, at a predetermined height from the floor and in a horizontal direction with a length of about 30 m, and is connected to an air conditioner 100 to supply air at a predetermined temperature (cold air in this embodiment) to the interior space R of the building. When installing this air conditioning duct 1, it may be simply connected to the air conditioner 100, or it may be hung from the ceiling, placed directly on the floor, or supported by a support member installed on the floor.

[0020] The air conditioner 100 is generally separated into an indoor unit 101 and an outdoor unit 102, and the indoor unit 101 blows out cool air at a predetermined temperature from an air outlet 101a and draws in air from the indoor space R from an air inlet 101b, and sends the gas medium that has absorbed heat in the indoor unit 101 to the outdoor unit 102 and sends the gas medium that has dissipated heat in the outdoor unit 102 to the indoor unit 101. Note that the air conditioner 100 may be configured such that the functions of the indoor unit 101 and the outdoor unit 102 are integrated.

[0021] The air conditioner 100 is also provided with a blow-out side adapter 200 at the air outlet 101a from which cool air at a predetermined temperature is blown out. As shown in Figure 3, the blow-out side adapter 200 includes a first cylindrical portion 201 disposed inside the base frame and a second cylindrical portion 202 disposed outside the periphery of the first cylindrical portion 201, and air at a predetermined temperature is blown out from the air outlet 101a of the air conditioner 100 through the first cylindrical portion 201 and the second cylindrical portion 202 into the interior of the air conditioning duct 1.

[0022] Next, the configuration of the air conditioning duct 1 will be specifically described.

[0023] As shown in Figures 3 and 4, this air conditioning duct 1 is made of a foldable, flexible, bag-shaped sheet material and includes a cylindrical first duct 10 with a bottom that is arranged inside along the direction of cold air blowing (horizontal in this embodiment), and a cylindrical second duct 20 with a bottom that is arranged outside the periphery of the first duct 10 along the direction of cold air blowing, and is configured as a two-layer structure consisting of a cylindrical first air layer K1 in the first duct 10 and a cylindrical second air layer K2 in the second duct 20 (air layer between the first duct 10 and the second duct 20).

[0024] 4, the first duct 10 is arranged coaxially inside the second duct 20, and is provided with a first inlet 11 formed on the end face of the base end and a plurality of first outlets 12 formed on the circumferential surface from the tip end to the center, and the end face of the tip end is formed in a closed state, and is configured to expand into a cylindrical shape in a manner extending in the air blowing direction by the cool air flowing in the forward direction inside the first duct 10. Note that the first duct 10 is evenly supported from the periphery by the second air layer K2 inside the second duct 20, and is therefore naturally arranged coaxially with the second duct 20.

[0025] The first inlet 11 is fitted into the first cylindrical portion 201 of the outlet side adapter 200 of the air conditioner 100, and the cold air blown out from the first cylindrical portion 201 flows into the first duct 10 through the first inlet 11.

[0026] Four first discharge ports 12 are provided symmetrically along the airflow direction on the left and right sides of the circumferential surface of the first duct 10 as viewed from the front, and discharge the cool air that has flowed forward through the first duct 10 diagonally downward in the radial direction. The first discharge ports 12 penetrate the second duct 20 so as to communicate the inside of the first duct 10 with the indoor space R, and are formed in the shape of a truncated cone that protrudes from the circumferential surface of the second duct 20.

[0027] As shown in Figure 4, the second duct 20 is arranged coaxially with the first duct 10 in a manner that covers the entire circumference, and is provided with a second inlet 21 formed on the end face of the base end and a plurality of second outlets 22 formed on the circumferential surface from the base end to the central part, and the end face of the tip end is formed in a closed state, so that the second duct 20 expands into a cylindrical shape in a manner that extends in the air blowing direction due to the cold air flowing in the forward direction within the second duct 20.

[0028] The second inlet 21 is fitted into the second cylindrical portion 202 of the outlet side adapter 200 of the air conditioner 100, and the cold air blown out from the second cylindrical portion 202 flows into the second duct 20 from the second inlet 21.

[0029] Four second discharge ports 22 are provided symmetrically along the airflow direction on the left and right sides of the circumferential surface of the second duct 20 as viewed from the front, and discharge cool air flowing forward through the second duct 20 diagonally downward. The second discharge ports 22 are formed in the shape of a truncated cone protruding from the circumferential surface of the second duct 20 so as to communicate the inside of the second duct 20 with the indoor space R.

[0030] 4, the first duct 10 and the second duct 20 are provided in a position where the second outlet 22 is relatively farther away from the air conditioner 100 than the first outlet 12. As a result, the cool air that has flowed into the second duct 20 is discharged from the second outlet 22 while roughly maintaining the temperature at which it was blown out from the air conditioner 100, so that air at a predetermined temperature by the air conditioner 100 can be supplied more efficiently to the indoor space R of the building.

[0031] 2, the first duct 10 and the second duct 20 are provided with annular first fastener portion 13 and second fastener portion 23 on the periphery of the tip end on the side opposite the air conditioner 100. Therefore, by opening the first fastener portion 13 and the second fastener portion 23 of the duct within a predetermined range, the air inside the air conditioning duct 1 can be released into the indoor space R of the building, making it possible to adjust the degree of expansion of the air conditioning duct 1 and prevent condensation.

[0032] Furthermore, the first duct 10 and the second duct 20 may be provided with annular wire members (not shown) around the peripheries of the first inlet 11 and the second inlet 21. This makes it possible to easily and reliably connect the first duct 10 and the second duct 20 of the air conditioning duct 1 to the first cylindrical portion 201 and the second cylindrical portion 202 of the air outlet adapter 200 when connecting the air conditioning duct 1 and the air outlet adapter 200.

[0033] Next, the material of the air conditioning duct 1 will be specifically described.

[0034] The air conditioning duct 1 is preferably made of a foldable, flexible sheet made of polyester fiber as the sheet material. For example, a plain weave of polyester fiber threads with a warp density and weft density of 50 to 300 threads per inch is used. The sheet material has a basis weight of 20 g / m2 so that it is lightweight enough to be deformed by the wind pressure of the cold air from the air conditioner 100, and has strength against the wind pressure of the cold air and pulling during installation. ２ ~100g / m ２ It is preferable that the thickness of the sheet material is within a range of 0.05 mm to 0.25 mm in order to improve ease of handling during installation of the air conditioning duct 1. It is also preferable that the tensile strength of the sheet material is 80 MPa or more and the tensile elongation of the sheet material is 10% or more.

[0035] In addition, the air conditioning duct 1 has a ventilation rate of 0.01 to 0.05 cm as long as it can expand into a cylindrical shape under the wind pressure of the cold air from the air conditioner 100. ３ / cm ２ / s, this can prevent the sheet material from being damaged by excessive force due to the wind pressure of the cold air, and can also prevent condensation from forming on the surface of the sheet material.

[0036] The air conditioning duct 1 may be coated with a thermosetting resin such as a polyurethane resin, a silicone resin, or a polyvinyl chloride resin containing a flame retardant. The amount of the thermosetting resin containing the flame retardant to be applied is set to 1 to 20 g / m so as to provide flame retardancy to the sheet material and prevent the thickness and weight of the sheet material from becoming excessively large. ２ is preferred.

[0037] Next, a specific description will be given of the flow of cool air in the air conditioning duct 1. The air conditioning duct 1 is connected to the air outlet 101a of the air conditioner 100.

[0038] First, when cool air at a predetermined temperature is blown out from the air outlet 101a of the air conditioner 100, the cool air passes through the first cylindrical portion 201 and the second cylindrical portion 202 of the outlet adapter 200 and flows into the first duct 10 and the second duct 20 from the first inlet 11 and the second inlet 21, as shown in Figures 3 and 4. At this time, the pressure of the cool air blown out from the air outlet 101a of the air conditioner 100 causes the first duct 10 and the second duct 20 to expand cylindrically along the air blowing direction.

[0039] The cool air that has flowed into the first duct 10 then flows forward in the first duct 10 from the base end to near the tip end, and is discharged diagonally downward in the radial direction from each of the first outlet ports 12 on the circumferential surface of the first duct 10 into the indoor space R, as shown in Figure 5(a) . At this time, the air layer K1 in the first duct 10 is surrounded by the air layer K2 in the second duct 20, and is therefore in an insulated or nearly insulated state. Therefore, the cool air that has flowed into the first duct 10 from the air conditioner 100 is discharged from each of the first outlet ports 12 while flowing through the first duct 10 from the center to the tip end, while roughly maintaining the predetermined temperature at which it was blown out from the air conditioner 100.

[0040] On the other hand, the cool air that has flowed into the second duct 20 flows sequentially in the forward direction from the base end to the center within the second duct 20, and is discharged into the indoor space R from each second outlet 22, as shown in FIG. 5(b). At this time, the air layer K2 within the second duct 20 is in close proximity to the air in the indoor space R. However, because the second outlet 22 is located close to the air conditioner 100, the cool air that has flowed into the second duct 20 from the air conditioner 100 is discharged from each second outlet 22 while flowing from the base end to the center within the second duct 20 while roughly maintaining the temperature it had when it was blown out from the air conditioner 100. Note that a portion of the cool air that has flowed into the second duct 20 passes the second outlet 22 and remains between the center and the tip of the second duct 20, thereby maintaining the thermal insulation of the first duct 10.

[0041] Thus, a portion of the cool air blown out from the air conditioner 100 is discharged through the first duct 10 at a location away from the air conditioner 100 while maintaining a predetermined temperature, and a portion of the cool air is discharged through the second duct 20 at a location close to the air conditioner 100 while maintaining a predetermined temperature, so that air at a predetermined temperature by the air conditioner 100 can be efficiently supplied to the indoor space R of the building.

[0042] In this embodiment, the air conditioning duct 1 has a two-layer structure consisting of the first duct 10 and the second duct 20, but it may have a three-layer or more structure.

[0043] In addition, the second duct 20 is provided with a second outlet 22 through which the cold air in the second duct 20 is discharged, but the second duct 20 may be configured so that the cold air flowing in from the second inlet 21 stagnates within the second duct 20 without the second outlet 22 being provided.

[0044] Furthermore, the first duct 10 and the second duct 20 are connected to the air outlet 101a of the air conditioner 100 via the adapter 200, but they may also be connected directly to the air outlet 101a of the air conditioner 100, or may be connected to the air outlet 101a of the air conditioner 100 via a hose or the like.

[0045] Furthermore, the first duct 10 and the second duct 20 are formed in the shape of a truncated cone with the first outlet 12 and the second outlet 22 protruding from the circumferential surface of the second duct 20, but as long as they connect the inside of the first duct 10 and the second duct 20 to the indoor space R of the building, they do not need to protrude from the circumferential surface of the second duct 20, or they may be formed in other shapes.

[0046] In addition, although the second duct 20 is arranged coaxially with the first duct 10 so as to cover the entire circumference thereof, it may be arranged so as to cover a portion of the circumference of the first duct 10. However, in order to reliably maintain the thermal insulation state of the first duct 10, it is preferable that the second duct 20 cover 80% or more of the circumference of the first duct 10.

[0047] Second Embodiment Next, a second embodiment of the air conditioning duct 1 according to the present invention will be described with reference to Figures 6 to 9. Note that only configurations that differ from the above embodiment will be described below, and descriptions of the same configurations will be omitted and the same reference numerals will be used.

[0048] As shown in Figures 6 and 7, this air conditioning duct 1 has a cylindrical third duct 30 with a bottom that is arranged outside the periphery of the second duct 20 along the air blowing direction, and is configured in a three-layer structure consisting of a cylindrical first air layer K1 in the first duct 10, an annular second air layer K2 in the second duct 20 (air layer between the first duct 10 and the second duct 20), and a cylindrical third air layer K3 in the third duct 30 (air layer between the second duct 20 and the third duct 30).

[0049] As shown in Figure 7, this third duct 30 is arranged coaxially with the second duct 20 in a manner that covers the entire circumference, and is provided with a cylindrical suction port 31 formed on the lower peripheral surface of the tip end and a cylindrical exhaust port 32 formed on the lower peripheral surface of the base end, and the end face of the tip end is formed in a closed state, and is configured to expand cylindrically in a manner that extends in the blowing direction (horizontal direction) due to air flowing in the opposite direction within the third duct 30.

[0050] The suction port 31 is formed in a manner that faces downward of the third duct 30 , and air in the indoor space R is sucked into the third duct 30 through the suction port 31 .

[0051] The exhaust port 32 is formed in a manner that faces downward toward the third duct 30, and is connected to the air conditioner 100, with one end of the suction hose 400 fitted thereto, so that air flowing in the reverse direction through the third duct 30 is discharged from the exhaust port 32 into the suction hose 400.

[0052] 6, the air conditioner 100 is provided with an intake side adapter 300 at the intake port 101b through which air from the indoor space R is drawn in. The other end of the suction hose 400 is connected to a cylindrical portion of the intake side adapter 300, and the air from the indoor space R flowing in from the suction hose 400 is drawn in through the cylindrical portion.

[0053] In this embodiment, as shown in Fig. 8, the first outlet 12 of the first duct 10 is formed in a truncated conical shape that penetrates the second duct 20 and the third duct 30 to communicate the inside of the first duct 10 with the indoor space R and protrudes from the circumferential surface of the third duct 30. As shown in Fig. 9, the second outlet 22 of the second duct 20 is formed in a truncated conical shape that penetrates the third duct 30 to communicate the inside of the second duct 20 with the indoor space R and protrudes from the circumferential surface of the third duct 30.

[0054] 6 , air from the indoor space R is sucked into the third duct 30 through the suction port 31, flows in the third duct 30 in the reverse direction from the tip to the base, is discharged from the outlet 32 ​​to the suction hose 400, and is sucked through the suction hose 400 into the suction port 101b of the air conditioner 100. At this time, heat exchange occurs between the air from the indoor space R flowing in the reverse direction through the third duct 30 (third air layer K3) and the air from the air conditioner 100 flowing in the forward direction through the second duct 20 (second air layer K2). This reduces the temperature difference between the air sucked into the suction port 101b of the air conditioner 100 from the third duct 30 and the air (cold air) blown out from the outlet 101a of the air conditioner 100 to the first duct 10 and the second duct 20, enabling efficient heat exchange of air in the air conditioner 100.

[0055] In each of the above embodiments, the air conditioning duct 1 is applied when cool air at a predetermined temperature is blown out from the air conditioner 100, but it may also be applied when warm air at a predetermined temperature is blown out from the air conditioner 100.

[0056] Furthermore, although the present air conditioning duct 1 is configured with a single duct in the lengthwise direction, it may also be configured with a plurality of ducts in series or in parallel in the lengthwise direction.

[0057] Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiments within the same scope as the present invention or within an equivalent scope.

[0058] DESCRIPTION OF SYMBOLS 1...air conditioning duct 10...first duct 11...first inlet 12...first outlet 13...first fastener portion 20...second duct 21...second inlet 22...second outlet 23...second fastener portion 30...third duct 31...suction port 32...exhaust port 100...air conditioner 101...indoor unit 101a...air outlet 101b...suction port 102...outdoor unit 200...air outlet side adapter 201...first cylindrical portion 202...second cylindrical portion 300...suction side adapter 400...suction hose K1...first air layer K2...second air layer K3...third air layer R...indoor space

Claims

1. An air conditioning duct arranged in the indoor space of a building and made of a flexible sheet material, comprising: a first duct arranged on the inside in a manner extending along the air blowing direction; and a second duct arranged on the outside around the first duct in a manner extending along the air blowing direction; the first duct has a first inlet through which air at a predetermined temperature from an air conditioner flows in and a first outlet through which the air in the first duct is discharged into the indoor space of the building, and is configured to expand into a cylindrical shape due to the air flowing through the first duct; and the second duct has a second inlet through which air at a predetermined temperature from the air conditioner flows in, and is configured to expand into a cylindrical shape due to the air flowing through the second duct.

2. An air conditioning duct as claimed in claim 1, wherein said first duct is provided on a peripheral surface thereof in such a manner that said first discharge port passes radially through said second duct.

3. An air conditioning duct as claimed in claim 1, wherein the second duct is provided with a second outlet port for discharging the air in the second duct into an indoor space of a building.

4. An air conditioning duct as claimed in claim 3, wherein the first duct and the second duct are provided at a position such that the second outlet is relatively closer to the air conditioner than the first outlet.

5. An air conditioning duct as claimed in claim 1, wherein the first duct and / or the second duct are provided with an openable and closable fastener portion at the end opposite the air conditioner for discharging air within the duct.

6. The air conditioning duct according to claim 1, wherein the first duct and / or the second duct has a wire member provided on the periphery of the first inlet and / or the second inlet.

7. An air conditioning duct as described in claim 1, further comprising a cylindrical third duct arranged outside the periphery of the second duct along the air blowing direction, the third duct having an intake port for drawing in air from the indoor space of the building and an exhaust port for discharging the air in the third duct to the air conditioner, and configured to expand into a cylindrical shape by the air flowing through the third duct.

8. An air conditioner set comprising the air conditioning duct according to any one of claims 1 to 7 and an air conditioner.

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