Air duct

Abstract

An air duct 2 that has a cylindrical portion for allowing air from an air conditioner to flow. The cylindrical portion is formed from a synthetic material sheet. The flexural rigidity of the synthetic material sheet is at least 1×10-5 N·m2 but less than 1×10-3 N·m2 at a width of 38 millimeters.

Description

[Technical field]

[0001] The present invention relates to a flexible air duct. [Background technology]

[0002] Conventionally, air ducts that guide the path through which air flows and are made of soft materials have been known. Patent Document 1 discloses this type of soft duct.

[0003] The sock duct of Patent Document 1 is configured to include a nonwoven fabric layer and a glass cloth layer that is separably disposed on the inner or outer periphery of the nonwoven fabric layer. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2016-125761 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, when a duct is made of the nonwoven fabric of Patent Document 1, the surface smoothness of the nonwoven fabric is low, and the drape of the nonwoven fabric causes it to buckle during blowing, resulting in a large loss of air flow.

[0006] The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide an air duct that can suppress buckling, can maintain its shape favorably, and can reduce friction loss during air blowing.

[0007] The problem to be solved by the present invention has been described above. Next, the means for solving this problem and the effects thereof will be described.

[0008] According to an aspect of the present invention, there is provided an air duct having a cylindrical portion for flowing air from an air conditioner. The cylindrical portion is made of a synthetic material sheet. The bending stiffness of the synthetic material sheet is 1×10 at a width of 38 mm. -5 N m 2 That's it, 1×10 -3 N m 2 is less than.

[0009] This allows the air duct to be bendable, making it easy to store and transport, and because it has a certain degree of stiffness, it can maintain a good cylindrical shape for allowing air to flow during operation.

[0010] In the air duct, the synthetic material sheet is breathable and waterproof, has a thermal conductivity of 0.1 w / mK or less, and has a mass per unit area of ​​100 g / m 2 It is preferable that the thickness is 0.2 mm or less.

[0011] This makes it possible to form an extremely lightweight air duct, and the breathability and waterproofing make it possible to effectively suppress the occurrence of condensation.

[0012] In the air duct, the synthetic material sheet is preferably a sheet in which synthetic fibers are bonded by heat and pressure, so that thin fibers having a diameter of 0.5 μm or more and 10 μm or less are randomly entangled and layered in a spider web shape.

[0013] This makes it possible to form an air duct that is resistant to bending, and improves the durability of the air duct.

[0014] The air duct preferably has the following configuration: That is, the air duct includes a plurality of straight pipe sections and bent pipe sections. The straight pipe sections are detachably connected to each other or to the bent pipe sections by linear fasteners. At least some of the straight pipe sections are formed with blowing sections.

[0015] This makes it easy to create air ducts of different shapes by adding or removing parts (straight pipe sections and bent pipe sections). Also, air can be appropriately blown out from the straight pipe sections.

[0016] The air duct is preferably configured as follows: the blowing section includes a plurality of unit blowing sections each including a plurality of blowing holes, the unit blowing sections being arranged at intervals from one another in the longitudinal direction of the straight pipe section.

[0017] This allows air to be blown out over a wide area.

[0018] The air duct preferably has the following configuration: the air duct comprises a main body and a storage section. The main body is formed from the synthetic material sheet, and air from an air conditioner flows inside the main body. The storage section is formed from the synthetic material sheet along the extension direction of the main body. The storage section is capable of storing an elongated strength member, and is located at the top of the main body when the main body is in use.

[0019] This makes it possible to suppress deformation in the direction in which the air duct extends.

[0020] In the air duct, it is preferable that at least one of the two surfaces of the synthetic material sheet is flame-retardant.

[0021] This makes the air duct less likely to burn.

[0022] The air duct preferably has the following configuration: the air duct comprises a plurality of unit ducts. The unit ducts are formed into a cylindrical shape from the synthetic material sheet. The unit ducts are detachably connected to each other by a resin line fastener. The resin line fastener is flame-retardant.

[0023] This allows the air duct to be disassembled and stored when not in use, significantly reducing storage space, and the use of a resin fastener effectively prevents condensation from forming. The resin fastener is also flame-resistant.

[0024] The air duct is preferably configured as follows. That is, the air duct includes a main pipe and a loop path constituent pipe. The main pipe and the loop path constituent pipe are formed from the synthetic material sheet. The main pipe is formed in a straight line. One end of the loop path constituent pipe is connected to the main pipe in the longitudinal direction so that a part of the loop path constituent pipe is located on an extension line of the main pipe. The other end of the loop path constituent pipe is connected to the main pipe in the radial direction so that the other part of the loop path constituent pipe is perpendicular to the longitudinal direction of the main pipe. The main pipe and the loop path constituent pipe form a P-shaped duct.

[0025] As a result, due to the dynamic pressure of the air flowing inside the air duct, the flow of air introduced from the main pipe becomes dominant in the loop path constituent pipe portion located on the extension line of the main pipe rather than in other loop path constituent parts that are perpendicular to the longitudinal direction of the main pipe, so that a pressure equalization state can be easily achieved inside the loop path constituent pipe. [Brief description of the drawings]

[0026] [Figure 1] 1 is a schematic diagram showing an overall configuration of an air conditioning system equipped with an air duct according to a first embodiment of the present invention. [Diagram 2] FIG. 4 is a diagram showing an example of measurement of bending stiffness of a sheet. [Diagram 3] FIG. 4 is a perspective view showing a configuration of a main pipe. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] FIG. 4 is a perspective view showing an example of a connection between a straight pipe section and a bent pipe section. [Figure 7] FIG. 4 is a partial perspective view showing the configuration of a loop path configuration pipe. [Figure 8] 1A is a partial perspective view showing the configuration of a holed straight pipe section, and FIG. [Figure 9] 1A is a partial perspective view showing a state where a rod is passed through the receiving part, and FIG. 1B is a partial perspective view showing a state where a string is passed through the receiving part. [Figure 10] FIG. 11 is a perspective view showing an air duct according to a second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] Next, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a schematic diagram showing the overall configuration of an air conditioning system 100 equipped with an air duct 2 according to a first embodiment of the present invention. In the following description, "upstream" and "downstream" refer to the upstream and downstream in the direction in which conditioned air flows.

[0028] The air conditioning system 100 shown in FIG. 1 can provide air from an air conditioner 1 (that is, conditioned air) via an air duct 2 to a target space.

[0029] Although the use of the air conditioning system 100 is not limited, it can be suitably used in situations where short-term air conditioning needs arise in facilities without fixed air conditioning equipment and spontaneous installation / removal of air conditioning equipment is desired. Specific examples include cases where temporary tents, gymnasiums, etc. are used for events or disaster evacuation.

[0030] As shown in FIG. 1, the air conditioning system 100 mainly includes an air conditioner 1 and an air duct 2.

[0031] The air conditioner 1 is driven by, for example, electricity generated by a generator (not shown). This generator is, for example, composed of a diesel engine or the like. The air conditioner 1 can take in outside air and emit conditioned air (that is, air whose air quality, including at least one of temperature, humidity, air cleanliness, etc., has been adjusted to a predetermined quality). The air conditioner 1 can be, for example, a known air-cooled heat pump type air conditioner equipped with a compressor, a heat exchanger, etc.

[0032] The air duct 2 constitutes a path through which the conditioned air discharged by the air conditioner 1 flows to a target space. The air duct 2 is formed, for example, from a sheet (synthetic material sheet) made of synthetic fibers such as 100% polyethylene. This sheet is formed, for example, by stacking continuous ultrafine long fibers having a thickness of 0.5 μm to 10 μm in a spider web shape and bonding them with heat and pressure. That is, this sheet is formed by randomly intertwining the fibers.

[0033] The air duct 2 thus formed has very little breathability and is also waterproof. The water pressure resistance of the air duct 2 of this embodiment is 8 kPa or more. That is, the air duct 2 of this embodiment is impermeable to water up to a water pressure of about 8 kPa. Furthermore, the air duct 2 made of the above sheet has a thermal conductivity of 0.1 w / mk or less and a mass per unit area of ​​100 g / m 2 The following properties are such that the thickness is 0.2 mm or less.

[0034] In addition, the fabric sheet of the air duct 2 of this embodiment is formed by overlapping ultra-fine fibers so as to have a certain thickness. This overlapping of fibers makes the surface of the sheet smooth, has high opacity, and has extremely high whiteness.

[0035] In addition, by applying a certain degree of pressure and heat to the overlapping fibers, the number of fusion points between the fibers per unit area can be increased. This makes the sheet harder than cloth and gives it a paper-like texture. Specifically, the bending stiffness of this sheet is 1×10 at a width of 38 mm. -5 N m2 That's it, 1×10 -3 N m 2 is less than.

[0036] The bending stiffness can be obtained, for example, by a bending stiffness test as shown in FIG. 2. The weight per unit area W (g / m 2 ) is cut to a width b (cm) and allowed to extend horizontally from the edge of the table by a length L (cm), with the part that touches the edge of the table being pressed down from above. A weight of F (g) may be attached to the end of the extended part of the sheet, but this weight can also be omitted. If the sheet is cut to a width of 38 mm, b = 3.8. If the deflection of the sheet is d (cm), the bending stiffness S can be calculated using the following formula.

number

[0037] The air duct 2 formed from this sheet can be inflated quickly like a paper balloon during use, and can maintain its inflated cylindrical shape well. For example, even when an opening is formed at the tip of the duct and air flows into the duct toward the opening, the shape of the air duct 2 (especially the shape of the tip side that is easily deformed by the air flow) can be maintained well, and air can be blown in a stable state. As a result, buckling of the air duct 2 can be suppressed, and friction loss of the conditioned air can be reduced.

[0038] Furthermore, because the fabric sheet of the air duct 2 has a paper-like texture as described above, the inner wall of the air duct 2 becomes smooth, which further reduces the friction loss of the conditioned air when blowing air. Tests have confirmed that the air duct 2 formed in this way can reduce friction loss to the same extent as a sheet metal spiral duct of the same shape.

[0039] Bending strength is 1×10 -5 N m 2If the bending stiffness is smaller than 1×10, the duct will buckle and flutter more when air is passed through it, causing problems with the air flow. -3 N m 2 If it is more than this, it will be difficult to handle, for example, it will be difficult to inflate even when air is passed through it.

[0040] The sheet is bent to a bending strength of 1 x 10 -5 N m 2 That's it, 1×10 -3 N m 2 When the sheet is configured so that the thickness is less than 1 mm, the sheet has better shape retention than conventional sheets, but is prone to creases and wrinkles when folded. Therefore, in this embodiment, a regular sashiko pattern is printed on the sheet on the surface that corresponds to the outer circumferential surface of the air duct 2. This pattern makes it possible to make creases and the like less noticeable in the appearance. However, the pattern may be a pattern other than sashiko, and printing of the pattern may be omitted.

[0041] At least one of the two surfaces of the sheet forming the air duct 2 of this embodiment is flame-retardant. This provides flame retardancy. In addition, in the air duct 2 of this embodiment, the wire fastener 9, which is used to connect the various parts of the air duct 2 formed from the sheet and will be described later, is also flame-retardant.

[0042] The air duct 2 of this embodiment is composed of a main pipe 3 and a loop path forming pipe 4, as shown in FIG.

[0043] The main pipe 3 is used to connect the air conditioner 1 and the loop path constituent pipe 4. The main pipe 3 guides conditioned air from the air conditioner 1 to the loop path constituent pipe 4. The main pipe 3 is formed, for example, in a straight pipe shape. That is, both ends in the longitudinal direction of the main pipe 3 are open.

[0044] As shown in FIG. 3, the main pipe 3 includes a first joint portion 31 formed on one side in the longitudinal direction, and a second joint portion 32 formed on the other side in the longitudinal direction.

[0045] The first joint part 31 is provided at the upstream end of the main pipe 3 in the direction in which the conditioned air flows. The first joint part 31 includes a string body 31a and a string stopper 31b. The string body 31a is formed in a pouch shape with the string body 31a stretched around the outer periphery of the main pipe 3.

[0046] The string 31a passes through a string passage formed along the outer periphery of the main pipe 3 at one end in the longitudinal direction of the main pipe 3. As shown in Fig. 3, the vicinity of both ends of the string 31a that passes through this string passage and goes around the main pipe 3 are fixed together by string stoppers 31b.

[0047] The effective length of string 31a can be adjusted by adjusting the position where string stopper 31b binds string 31a. The shorter the length of string 31a passing through the string passage of main pipe 3, the smaller the opening area of ​​main pipe 3 on the side where first joint part 31 is provided. That is, by pulling string 31a to close the opening of a drawstring bag, and then binding string 31a with string stopper 31b, the opening of main pipe 3 can be kept narrowed.

[0048] As a result, after the first joint part 31 is positioned on the outer periphery of the conditioned air exhaust pipe 11 of the air conditioner 1, the first joint part 31 (the opening of the air duct 2) can be tightly attached to the outer periphery of the conditioned air exhaust pipe 11 by a simple operation such as pulling the string body 31a. As a result, the main pipe 3 and the air conditioner 1 are connected. In this way, the work of connecting the main pipe 3 and the air conditioner 1 is extremely simplified, and the work effort can be significantly reduced.

[0049] The second joint part 32 is provided at the downstream end of the main pipe 3 in the direction in which the conditioned air flows. The second joint part 32 is formed by providing an element 91 of a resin line fastener 9 so as to go around the main pipe 3. The element 91 provided at the second joint part 32 and an element 91 provided at a first flow section 51 described below are engaged with each other by the slider 92, thereby connecting the main pipe 3 and the connecting pipe 5 (first flow section 51). The slider 92 may be provided so as to be unremovable from either of the two elements 91, or may be provided so as to be removable from either element 91.

[0050] 5, the main pipe 3 may be composed of a plurality of straight pipe sections (unit ducts) 61. The straight pipe sections 61 are connected to each other by resin line fasteners 9. This allows the length of the main pipe 3 to be easily adjusted as necessary.

[0051] In the air duct 2 of this embodiment, the main pipe 3 is connected to the loop path forming pipe 4 via a connecting pipe 5 .

[0052] The connecting pipe 5 guides the conditioned air from the main pipe 3 into the loop path forming pipe 4. The connecting pipe 5 connects the main pipe 3 and the loop path forming pipe 4. As shown in Fig. 4, the connecting pipe 5 is formed in a substantially T-shape and has a first flow section 51 and a second flow section 52. The connecting pipe 5 is integrally formed from the above-mentioned synthetic material sheet.

[0053] The first circulating section 51 connects the main pipe 3 and the loop path constituent pipe 4. The first circulating section 51 guides the conditioned air from the main pipe 3 to the loop path constituent pipe 4. As shown in Fig. 4, the first circulating section 51 is formed in a straight pipe shape through which the conditioned air flows straight during ventilation. The first circulating section 51 is disposed along the longitudinal direction of the main pipe 3 (i.e., the direction in which the conditioned air flows in the main pipe 3).

[0054] The longitudinal direction of the first circulating portion 51 coincides with the longitudinal direction of the main pipe 3. A first opening 51a is formed at the end of the first circulating portion 51 located closer to the main pipe 3. A second opening 51b is formed at the end of the first circulating portion 51 located farther from the main pipe 3.

[0055] From the viewpoint of the flow of the conditioned air, the first opening 51a is an inlet of the conditioned air in the first circulation section 51. The second opening 51b is an outlet of the conditioned air in the first circulation section 51. The conditioned air flows through the first opening 51a, the second opening 51b, and the loop path forming pipe 4 in this order, without changing its direction.

[0056] In the first flow section 51, the second opening 51b is formed smaller than the first opening 51a of the first flow section 51. For example, when the first opening 51a is formed to be 300 mmΦ, the second opening 51b is formed to be 215 mmΦ. During ventilation, the cross-sectional area of ​​the first opening 51a in this embodiment is substantially the same as the cross-sectional area of ​​the main pipe 3. Moreover, during ventilation, the cross-sectional area of ​​the second opening 51b is substantially the same as the cross-sectional area of ​​a loop path constituent pipe 4 described below.

[0057] An element 91 of a line fastener 9 is provided along the opening contour in the first opening 51a and the second opening 51b of the first flow section 51. The first opening 51a of the first flow section 51 is detachably connected to the downstream end of the main pipe 3 (i.e., the second joint section 32) via the line fastener 9. The second opening 51b is detachably connected to the upstream end of the loop path forming pipe 4 via the line fastener 9.

[0058] With this configuration, the portion of the loop path constituent pipe 4 connected to the second opening 51b of the connecting pipe 5 is located on an extension line of the main pipe 3. As a result, the conditioned air in the main pipe 3 easily flows into the loop path constituent pipe 4 via the first flow section 51 of the connecting pipe 5 due to its dynamic pressure.

[0059] 4, a resistance portion 51c that increases the resistance to the flow of the conditioned air is provided in the downstream portion of the first flow section 51. The resistance portion 51c is formed in a trapezoidal cone shape in which the cross-sectional area of ​​the path through which the conditioned air flows gradually narrows toward the second opening 51b.

[0060] With this configuration, the flow speed of the conditioned air passing through the resistance portion 51c gradually increases, so that the conditioned air quickly flows into the loop path forming pipe 4 on the downstream side.

[0061] 4, the second circulating section 52 is formed in a straight pipe shape through which conditioned air flows straight during ventilation. In the second circulating section 52, a loop path forming pipe connection end 52a, which is an end opposite to the side connected to the first circulating section 51, is connected to an end of the loop path forming pipe 4.

[0062] Similar to the first opening 51a and the second opening 51b of the first flow section 51, the loop path forming pipe connecting end 52a has an element 91 of a line fastener 9 provided along the opening contour. The loop path forming pipe connecting end 52a is detachably connected to the end of the loop path forming pipe 4 via the line fastener 9.

[0063] The second circulation section 52 is connected to the first circulation section 51 upstream of the resistance section 51c. This makes it possible to greatly reduce the influence of the circulation of the conditioned air in the second circulation section 52 on the flow of the conditioned air in the resistance section 51c of the first circulation section 51. That is, the resistance section 51c allows the conditioned air to be suitably guided into the loop path forming pipe 4.

[0064] With this configuration, the portion of the loop path constituent pipe 4 connected to the loop path constituent pipe connection end 52a is perpendicular to the first flow section 51 (that is, the main pipe 3).

[0065] The loop path constituent pipe 4 constitutes most of the loop-shaped path through which the conditioned air flows by connecting the second opening 51b of the connecting pipe 5 and the loop path constituent pipe connection end 52a. When in use, the loop path constituent pipe 4 is attached to the ceiling of the space to be air-conditioned, and discharges the conditioned air into the space to be air-conditioned.

[0066] As described above, the air duct formed by connecting the main pipe 3 to the loop path constituent pipe 4 via the connecting pipe 5 is a P-shaped duct as shown in Fig. 1 or Fig. 5. As a result, the flow of conditioned air introduced into the part of the loop path constituent pipe 4 located on the extension line of the main pipe 3 becomes dominant due to the dynamic pressure of the conditioned air flowing through the main pipe 3. As a result, as shown in Fig. 1, no merging of conditioned air occurs in the loop path constituent pipe 4, so that a pressure equalization state in the loop path constituent pipe 4 can be easily achieved.

[0067] It is preferable that the loop path constituent pipe 4 is formed thinner than the main pipe 3. For example, when the diameter of the main pipe 3 is 300 mmΦ, the diameter of the loop path constituent pipe 4 is set to 215 mmΦ. However, this is not limited to this. As shown in Fig. 5, the loop path constituent pipe 4 is composed of a plurality (four in this embodiment) of straight pipe sections (unit ducts) 61 and a plurality (three in this embodiment) of bent pipe sections (unit ducts) 62.

[0068] An element 91 of a line fastener 9 is provided along the opening contour at both ends of each straight pipe section 61 and curved pipe section 62. That is, as shown in Fig. 6 etc., the end of each straight pipe section 61 and curved pipe section 62 can be detachably connected to another straight pipe section 61, curved pipe section 62, or connecting pipe 5 via the line fastener 9.

[0069] The straight pipe section 61 is formed in a straight pipe shape through which conditioned air flows straight during ventilation. The straight pipe section 61 is prepared in different lengths, and can be appropriately selected and used according to the shape of the air duct 2 to be formed.

[0070] The straight pipe section 61 constituting the loop path configuration pipe 4 of this embodiment is formed with an outlet hole 70 for discharging conditioned air into a space to be air-conditioned. In the following description, the straight pipe section 61 in which the outlet hole 70 is formed is referred to as a straight pipe section 63 with a hole.

[0071] 8, the perforated straight pipe section 63 has a plurality of unit blowing sections 7 formed at its lower part when attached to the ceiling of the space to be air-conditioned. The plurality of unit blowing sections 7 are arranged at a predetermined first interval L1 along the longitudinal direction of the perforated straight pipe section 63. The plurality of unit blowing sections 7 constitute the blowing section of the perforated straight pipe section 63.

[0072] As shown in Fig. 8, the unit blowing section 7 closest to the end of the perforated straight pipe section 63 is preferably disposed at a predetermined second distance L2 from the end of the perforated straight pipe section 63. This second distance L2 may be the same as or different from the first distance L1.

[0073] Each unit blowing section 7 has a plurality of blowing holes 70 (three in this embodiment). The plurality of blowing holes 70 are arranged at equal intervals on the peripheral wall of the perforated straight pipe section 63, as shown in Fig. 8, for example. The intervals between the plurality of blowing holes 70 can be determined, for example, so that the blowing holes 70 are positioned at a predetermined distance D1 when projected onto a plane. However, this is not limited thereto, and for example, the plurality of blowing holes can be arranged in a staggered pattern or so as to form any pattern as a whole.

[0074] The bent pipe section 62 is formed in an arc shape in a plan view. The bent pipe section 62 is used in a location where it is necessary to change the direction of the conditioned air flow. By passing through the bent pipe section 62, the direction of the conditioned air flow is changed by 90°. However, this is not limited to this, and the arc angle of the bent pipe section 62 can be changed arbitrarily as necessary.

[0075] The straight pipe sections 61 and the bent pipe sections 62 have their ends connected to each other by resin line fasteners 9 to form a loop path forming pipe 4 that forms most of the loop as shown in FIG. 1 or FIG. 5, etc.

[0076] Since the loop path constituent pipe 4 of this embodiment is formed by combining a plurality of parts (straight pipe section 61 and bent pipe section 62), it is possible to configure loop path constituent pipes 4 of different shapes by increasing or decreasing the number of parts (straight pipe section 61 and bent pipe section 62). This allows for flexible response to the shape and size of the target space to be air-conditioned.

[0077] A straight pipe section 61 not having the blow-out holes 70 may be used as a part of the straight pipe section 61 constituting the loop path forming pipe 4. For example, a straight pipe section 61 not having the blow-out holes 70 is used in a portion where it is not necessary to release conditioned air. This makes it possible to eliminate pressure loss caused by the blow-out of the conditioned air, and allows the conditioned air to flow suitably into the downstream loop path forming pipe 4.

[0078] The air duct 2 of this embodiment includes a main body (cylindrical portion) composed of the main pipe 3, the loop path constituent pipe 4, and the connecting pipe 5 connecting the main pipe 3 and the loop path constituent pipe 4 as described above, as well as a storage section 8.

[0079] The accommodating section 8 is used for routing, fixing, etc., of the air duct 2 (main body portion, etc.). As shown in Figs. 3, 6, etc., the accommodating section 8 is formed on the main pipe 3 and the loop path constituent pipe 4. The accommodating section 8 is made of the same material as the above-mentioned synthetic material sheet that forms the main body portion of the air duct 2. This simplifies management of materials during manufacturing and reduces costs. The accommodating section 8 is fixed to the main pipe 3 and the loop path constituent pipe 4 by being sewn integrally with the main pipe 3 and the loop path constituent pipe 4 when the main pipe 3 and the loop path constituent pipe 4 are formed.

[0080] The accommodation section 8 is configured to be hollow, and as shown in Fig. 9(a), a strength member such as a rod 82 can be inserted and accommodated therein. By providing the rod 82 inside the accommodation section 8, the elongated shapes of the main pipe 3 and the loop path constituent pipe 4 can be easily maintained.

[0081] When the air duct 2 is installed at the site, the housing 8 can be cut at any position in the longitudinal direction, for example, as shown in FIG. 6 or FIG. 9(b). The cutting can be easily performed using a general-purpose tool such as scissors. This allows the location where the rod 82 is passed through to be flexibly changed. Also, as shown in FIG. 9(b), a string 83 can be passed through one or more cut housings 8, and the air duct 2 can be attached to the ceiling of the space to be air-conditioned so as to be suspended by the string 83. However, this is not limited to this, and for example, the air duct 2 may be attached to the ceiling of the space to be air-conditioned via an attachment string or the like on both sides in the longitudinal direction of the rod 82 housed in the housing 8. In this embodiment, cutting lines are printed at equal intervals on the housing 8 to serve as a guide for the cutting position. However, the cutting lines may be omitted.

[0082] As described above, the air duct 2 of this embodiment has a cylindrical portion for flowing air from an air conditioner. The cylindrical portion is made of a synthetic material sheet. The bending stiffness of the synthetic material sheet is 1×10 at a width of 38 mm. -5 N m 2 That's it, 1×10 -3 N m 2 is less than.

[0083] This allows the air duct 2 to be bendable, facilitating storage and transportation, and because it has a certain degree of stiffness, it can satisfactorily maintain a cylindrical shape for air flow during operation.

[0084] In the air duct 2 of this embodiment, the synthetic material sheet is breathable and waterproof, has a thermal conductivity of 0.1 w / mK or less, and a mass per unit area of ​​100 g / m 2 The thickness is 0.2 mm or less.

[0085] This makes it possible to form an extremely lightweight air duct 2, and at the same time, the occurrence of condensation can be effectively suppressed by providing breathability and waterproofing.

[0086] In addition, in the air duct 2 of this embodiment, the synthetic material sheet is a sheet in which synthetic fibers are bonded by heat and pressure, causing thin fibers having a thickness of 0.5 μm or more and 10 μm or less to randomly intertwine and be layered in a spider web shape.

[0087] This makes it possible to form an air duct 2 that is resistant to bending, and the durability of the air duct 2 can be improved.

[0088] The air duct 2 of this embodiment includes a plurality of straight pipe sections and bent pipe sections. The straight pipe sections are detachably connected to each other or to the bent pipe sections by linear fasteners 9. At least some of the straight pipe sections are formed with blowing sections.

[0089] This makes it possible to easily form air ducts 2 of different shapes by increasing or decreasing the number of parts (straight pipe sections and bent pipe sections). Also, air can be appropriately blown out from the straight pipe sections.

[0090] In the air duct 2 of this embodiment, the blowing section includes a plurality of unit blowing sections each including a plurality of blowing holes. The unit blowing sections are arranged at intervals in the longitudinal direction of the straight pipe section.

[0091] This allows air to be blown out over a wide area.

[0092] Moreover, the air duct 2 of this embodiment includes a main body (main pipe 3, loop path constituent pipe 4, and connecting pipe 5 connecting the main pipe 3 and the loop path constituent pipe 4) and a storage section 8. The main body is formed of a synthetic material sheet, and air from the air conditioner flows inside. The storage section 8 is formed of a synthetic material sheet along the extension direction of the main body. The storage section 8 is capable of storing an elongated rod 82, and is located at the top of the main body when the main body is in use.

[0093] This makes it possible to suppress deformation of the air duct 2 in the extension direction.

[0094] In the air duct 2 of this embodiment, at least one of the two surfaces of the synthetic material sheet is flame-retardant.

[0095] This makes the air duct 2 less flammable.

[0096] Moreover, the air duct 2 of this embodiment includes a plurality of unit ducts (straight pipe section 61 and / or curved pipe section 62). The unit ducts are formed into a cylindrical shape from a synthetic material sheet. The unit ducts are detachably connected to each other by a resin line fastener 9. The resin line fastener 9 is flame-retardant.

[0097] This allows the air duct 2 to be disassembled and stored when not in use, significantly saving storage space, and the use of the resin line fastener 9 effectively prevents condensation from forming. The resin fastener is also flame-resistant.

[0098] The air duct 2 of this embodiment includes a main pipe 3 and a loop path constituent pipe 4. The main pipe 3 and the loop path constituent pipe 4 are formed of a synthetic material sheet. The main pipe 3 is formed in a straight line. One end of the loop path constituent pipe 4 is connected to the main pipe 3 in the longitudinal direction so that a part of the loop path constituent pipe 4 is located on an extension line of the main pipe 3. The other end of the loop path constituent pipe 4 is connected to the main pipe 3 in the radial direction so that the other part of the loop path constituent pipe 4 is perpendicular to the longitudinal direction of the main pipe 3. The main pipe 3 and the loop path constituent pipe 4 form a P-shaped duct.

[0099] As a result, due to the dynamic pressure of the air flowing inside the air duct 2, the flow of air introduced from the main pipe 3 becomes dominant in the loop path constituent pipe 4 portion located on the extension line of the main pipe 3 rather than in other loop path constituent parts perpendicular to the longitudinal direction of the main pipe 3, so that a pressure equalization state inside the loop path constituent pipe 4 can be easily achieved.

[0100] Next, a second embodiment will be described. Fig. 10 is a plan view showing an air duct 2a of the second embodiment. In the description of this embodiment, the same or similar members as those in the above embodiment are given the same reference numerals in the drawings, and the description may be omitted.

[0101] In the air duct 2a of this embodiment, the loop path forming pipe 4a does not form a loop path but forms an end path. This loop path forming pipe 4a is composed of a plurality of (two in the example of FIG. 10) holed straight pipe sections 63 and an end pipe 64, for example, as shown in FIG.

[0102] The end pipe 64 has one end formed in a round pipe shape so that it can be connected to the holed straight pipe portion 63, and the other end is closed. The end pipe 64 is connected to the holed straight pipe portion 63 via a line fastener 9.

[0103] The air duct 2a of this embodiment is formed from a sheet with a certain stiffness, so even when blowing air in the shape shown in Figure 10, buckling during blowing can be suppressed and the shape can be well maintained. As a result, friction loss of conditioned air can be reduced and blowing efficiency can be improved.

[0104] In the air duct 2a of this embodiment, the connecting pipe 5 may be omitted. In other words, the loop path forming pipe 4a may be directly connected to the main pipe 3.

[0105] Although the preferred embodiment of the present invention has been described above, the above configuration can be modified, for example, as follows.

[0106] The air duct 2 may be formed in a square tube shape instead of a round tube shape.

[0107] The bent pipe portion 62 may be provided with an outlet portion.

[0108] The rod 82 may be provided in the receiving portion 8 corresponding to only a part of the plurality of straight pipe portions 61 and / or bent pipe portions 62 of the loop path forming pipe 4.

[0109] The main pipe 3, the connecting pipe 5, and the loop path forming pipe 4 may be connected to each other via a hook-and-loop fastener or the like instead of the line fastener 9.

[0110] A bellows-shaped coiled pipe may be provided between the conditioned air exhaust pipe 11 and the main pipe 3. In this case, the main pipe 3 is attached to the coiled pipe.

[0111] The main pipe 3 may be made of synthetic material sheets either at its downstream end or entirely. [Explanation of symbols]

[0112] 1 Air conditioner 2. Air Duct

Claims

1. An air duct having a cylindrical portion for flowing air from an air conditioner, the tubular portion is constructed from a sheet of synthetic material; The bending stiffness of the synthetic sheet is 1×10 at 38 mm width. -5 N.m 2 That's it, 1 x 10 -3 N.m 2 The air duct according to claim 1,

2. 2. The air duct of claim 1, The synthetic material sheet is breathable and waterproof, has a thermal conductivity of 0.1 W / mK or less, and a mass per unit area of ​​100 g / m 2 The air duct is characterized in that the thickness is 0.2 mm or less.

3. 3. The air duct according to claim 1 or 2, The synthetic material sheet is a sheet in which synthetic fibers are bonded by heat and pressure, so that thin, long fibers having a diameter of 0.5 μm or more and 10 μm or less are randomly entangled and layered in a spider web shape.

4. An air duct according to any one of claims 1 to 3, A plurality of straight pipe sections and bent pipe sections are provided, The straight pipe sections are detachably connected to each other or to the straight pipe section and the bent pipe section by a linear fastener, An air duct, characterized in that at least a part of the straight pipe section is formed with a blowing section.

5. 5. The air duct of claim 4, The blowing section includes a plurality of unit blowing sections each including a plurality of blowing holes, The air duct, wherein the plurality of unit blowing sections are arranged at intervals from each other in the longitudinal direction of the straight pipe section.

6. An air duct according to any one of claims 1 to 5, a main body formed from the synthetic material sheet, through which air from an air conditioner flows; a receiving portion formed by the synthetic material sheet along an extension direction of the main body portion; Equipped with The air duct is characterized in that the accommodating portion is capable of accommodating an elongated strength member and is located at the top of the main body portion when the main body portion is in use.

7. An air duct according to any one of claims 1 to 6, An air duct characterized in that at least one of the two surfaces of the synthetic material sheet is flame retardant.

8. An air duct according to any one of claims 1 to 7, A plurality of unit ducts formed in a cylindrical shape by the synthetic material sheet are provided, The unit ducts are detachably connected to each other by a resin fastener, The air duct is characterized in that the resin line fastener is flame-retardant.

9. An air duct according to any one of claims 1 to 8, a main pipe formed from the synthetic material sheet; a loop path forming tube formed by the synthetic material sheet; and Equipped with The main pipe is formed in a straight line, one end of the loop path constituent pipe is connected to the main pipe in a longitudinal direction thereof so that a part of the loop path constituent pipe is located on an extension line of the main pipe; the loop path constituent pipe has another end connected to the main pipe in a radial direction such that another part of the loop path constituent pipe is perpendicular to a longitudinal direction of the main pipe; The air duct, wherein the main pipe and the loop path constituent pipes form a P-shaped duct.

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