Duct, air conditioning system, building, and air conditioning method

Abstract

To provide a duct capable of dehumidifying a space in which the duct is arranged, an air conditioning system including the duct, a building including the air conditioning system, and an air conditioning method including the duct.SOLUTION: The duct 7 can dehumidify a space where the duct 7 is arranged. The duct 7 includes a cylindrical member 9 having a space capable of circulating the air-conditioned air in an internal 7a. The cylindrical member 9 includes a moisture permeable part 10 having moisture permeability capable of moving moisture on an outer side 7b of the cylindrical member 9 to an inner side 7a.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a duct for circulating conditioned air inside, an air conditioning system including the duct, a building including the air conditioning system, and an air conditioning method including the duct. [Background technology]

[0002] Ducts for circulating conditioned air inside have been known. For example, Patent Document 1 below presents a duct used in an air conditioning system for conditioning multiple spaces in a building with a single heat source including at least one air conditioner. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-004682 Summary of the Invention [Problem to be solved by the invention]

[0004] The duct in Patent Document 1 is at least partially located in a buffer space, which is a space other than a living room, but when the relative humidity in the buffer space is high and the temperature of the air inside the duct is low, condensation can occur on the outer surface of the duct.

[0005] The present invention has been devised in consideration of the above-described circumstances, and its main object is to provide a duct that can dehumidify the space in which the duct is placed, an air conditioning system including the duct, a building including the air conditioning system, and an air conditioning method including the duct. [Means for solving the problem]

[0006] The present invention is a duct that includes a tubular member having a space inside which conditioned air can flow, and the tubular member includes a moisture-permeable portion that has moisture permeability that allows moisture outside the tubular member to move to the inside of the tubular member. [Effects of the Invention]

[0007] The duct of the present invention has the above-described configuration, and is therefore capable of dehumidifying the space in which the duct is placed. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a conceptual diagram showing one embodiment of a building including a duct of the present invention. [Figure 2] FIG. [Figure 3] 1 is a flowchart of an air conditioning method. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a conceptual diagram showing a building 1 including a duct 7 according to this embodiment. To facilitate understanding of the invention, FIG. 1 includes exaggerated representations and representations that differ from the dimensional ratios of the actual structure. Furthermore, while FIG. 1 illustrates a two-story house, the building 1 is not limited to this form and may be, for example, a single-story house, a house with three or more stories, or a building.

[0010] As shown in Figure 1, the building 1 of this embodiment includes a plurality of living rooms 4 provided on an upper floor 2 and a lower floor 3, and a buffer space 5 which is a space other than the living rooms 4. The buffer space 5 includes, for example, an attic space 5a above the upper floor 2, an inter-floor space 5b between the upper floor 2 and the lower floor 3, and an underfloor space 5c below the lower floor 3. Such a buffer space 5 is effective as a space for arranging wiring and piping, and also helps to mitigate the transfer of sound and heat.

[0011] The building 1 of this embodiment includes an air conditioning system 6 for air conditioning the rooms 4. The air conditioning system 6 of the building 1 preferably includes a duct 7 for circulating the conditioned air, and an air conditioner 8 for supplying the conditioned air to the duct 7. Such an air conditioning system 6 can air condition all of the rooms 4 with a single air conditioner 8.

[0012] Fig. 2 is a partial cross-sectional perspective view of the duct 7. As shown in Fig. 2, the duct 7 of this embodiment includes a tubular member 9 having a space in the interior 7a through which conditioned air can flow. The tubular member 9 preferably includes a moisture-permeable portion 10 having moisture permeability that allows moisture on the exterior 7b of the tubular member 9 to move to the interior 7a. Here, in this specification, "having moisture permeability" means that the moisture permeation resistance is 0.2 m 2 ·s·Pa / μg or less. The moisture permeability resistance is measured in accordance with JIS A1324 using the cup method at a set temperature of 23°C and a relative humidity of 50%.

[0013] Such cylindrical member 9 can move moisture from the air on the outside 7b to the interior 7a by using conditioned air with a low relative humidity circulating in the interior 7a. For example, in a hot and humid environment in summer, cylindrical member 9 can efficiently move moisture from the air on the outside 7b to the interior 7a by using air with a low relative humidity conditioned by the cooling operation of the air conditioner 8. Therefore, the duct 7 of this embodiment can dehumidify the space in which the duct 7 is placed and can suppress condensation from forming on the outer surface of the duct 7.

[0014] In a more preferred embodiment, the cylindrical member 9 includes an outer layer 9a on the outer surface side, an inner layer 9b on the inner surface side, and an intermediate layer 9c between the outer layer 9a and the inner layer 9b. In such a cylindrical member 9, the outer layer 9a, the inner layer 9b, and the intermediate layer 9c can each have a unique function.

[0015] The tubular member 9 may include, for example, a moisture-impermeable portion 11 through which moisture cannot move. The moisture-permeable portion 10 and the moisture-impermeable portion 11 may be provided, for example, at different positions in the longitudinal direction of the tubular member 9. The moisture-permeable portion 10 and the moisture-impermeable portion 11 may be provided, for example, at different positions in the circumferential direction of the tubular member 9. Such a moisture-impermeable portion 11 is useful for reducing manufacturing costs and can block the movement of fluid, thereby improving air circulation efficiency.

[0016] The moisture-permeable portion 10 and the moisture-impermeable portion 11 preferably have different outer layers 9a but share the same inner layer 9b and intermediate layer 9c. That is, the outer layer 9a of the tubular member 9 includes the outer layer 10a of the moisture-permeable portion 10 and the outer layer 11a of the moisture-impermeable portion 11. As a result, the moisture-permeable portion 10 of this embodiment includes the outer layer 10a on the outer surface side, the inner layer 9b on the inner surface side, and the intermediate layer 9c between the outer layer 10a and the inner layer 9b. Similarly, the moisture-impermeable portion 11 of this embodiment includes the outer layer 11a on the outer surface side, the inner layer 9b on the inner surface side, and the intermediate layer 9c between the outer layer 11a and the inner layer 9b. Such a tubular member 9 helps reduce manufacturing costs.

[0017] The outer layer 10a of the moisture permeable part 10 of this embodiment is made of a material that is permeable to moisture but not to air. Such a moisture permeable part 10 can dehumidify the air in the outside 7b without reducing the air flow efficiency.

[0018] The outer layer 10a of the moisture-permeable part 10 is formed of, for example, a gas-barrier moisture-permeable film. Examples of gas-barrier moisture-permeable films include cellulose films. Such moisture-permeable part 10 has a hydrophilic effect that allows moisture to pass through while inhibiting the passage of air and odors.

[0019] The outer layer 10a of the moisture permeable portion 10 may be formed of, for example, a variable moisture permeability airtight sheet. Here, the variable moisture permeability airtight sheet is a sheet made of a special resin whose moisture permeability changes according to humidity conditions. Such a moisture permeable portion 10 can reduce moisture permeation resistance in a hot and humid summer environment and can efficiently transfer moisture from the air outside 7b to the inside 7a.

[0020] The outer layer 10a of the moisture-permeable portion 10 may be formed of, for example, a moisture-permeable sheet or a moisture-permeable waterproof sheet. Such a moisture-permeable portion 10 helps to move moisture from the air outside 7b to the inside 7a.

[0021] The outer layer 11a of the moisture-impermeable portion 11 of this embodiment is formed of a material that does not allow air or moisture to pass through. The outer layer 11a of the moisture-impermeable portion 11 is formed of, for example, a polypropylene sheet. Such a moisture-impermeable portion 11 is useful for reducing manufacturing costs and can reliably block the movement of fluids, thereby improving air circulation efficiency.

[0022] The inner layer 9b is formed of, for example, a nonwoven fabric. Such an inner layer 9b has high moisture permeability and is suitable for transferring moisture from the air outside 7b to the interior 7a. In addition, the inner layer 9b also has excellent heat insulating properties and is suitable for maintaining the temperature of the air circulating inside 7a.

[0023] The inner layer 9b is preferably formed by spirally winding a tubular nonwoven fabric with a wire 9d. For example, the inner layer 9b may be formed into a tubular shape by spirally winding a nonwoven fabric with an internal wire 9d. Such an inner layer 9b has a shape-retaining function and can facilitate the installation of the duct 7.

[0024] The intermediate layer 9c is preferably made of a moisture-permeable heat-insulating material, such as glass wool. Such an intermediate layer 9c can maintain the temperature of the air circulating inside 7a, improving air-conditioning efficiency.

[0025] As shown in Fig. 1, the moisture permeable portion 10 of the duct 7 of this embodiment is disposed in a buffer space 5, which is a space other than the living room 4. Fig. 1 illustrates moisture permeable portions 10 disposed in an attic space 5a and an inter-floor space 5b. Such a duct 7 can move moisture from the moisture permeable portion 10 to the interior 7a of the duct 7, thereby dehumidifying the attic space 5a and the inter-floor space 5b.

[0026] The moisture-permeable portion 10 of the duct 7 is preferably provided in the supply path 12 for supplying the air conditioned by the air conditioner 8 to the living room 4. Such a duct 7 can efficiently dehumidify the buffer space 5 using the air with the lowest relative humidity generated by the air conditioner 8.

[0027] Although not shown, the duct 7 may include, for example, an exhaust path for exhausting the conditioned air from the living room 4 to the outdoors. In this case, the moisture permeable portion 10 of the duct 7 may be provided, for example, in this exhaust path. Such moisture permeable portion 10 can dehumidify the buffer space 5 in which the exhaust path is located, using the conditioned air from the living room 4, without affecting the humidity in the living room 4.

[0028] The air conditioning method for the building 1 will be described with reference to FIGS. Fig. 3 is a flowchart of the air conditioning method of this embodiment. As shown in Fig. 3, the air conditioning method of this embodiment includes an arrangement step S1 of arranging the moisture-permeable portion 10 of the duct 7 in the buffer space 5, which is a space other than the living room 4.

[0029] In the arranging step S1, for example, the moisture-permeable portions 10 of the duct 7 are arranged in a part of the attic space 5a and the inter-floor space 5b. In this arranging step S1, the ratio of the moisture-permeable portions 10 to the non-moisture-permeable portions 11 can be adjusted depending on the number of rooms 4 and the volume of the buffer space 5.

[0030] The air conditioning method of this embodiment includes a dehumidifying step S2 in which conditioned air having a lower relative humidity than the buffer space 5 is circulated through the interior 7a of the tubular member 9 of the duct 7, thereby moving moisture from the buffer space 5 to the interior 7a. Such a dehumidifying step S2 can be performed by operating the air conditioner 8.

[0031] Although a particularly preferred embodiment of the present invention has been described in detail above, the present invention is not limited to the above-described embodiment and can be modified and practiced in various ways. [Example]

[0032] Using the "Unsteady State Heat and Moisture Calculation System H&M" from Architectural Environmental Solutions, the moisture permeability of the moisture permeable part of the example and the non-moisture permeable part of the comparative example were calculated by simulation. In this simulation, the inner layer, which has little effect on moisture permeability, was omitted from the calculation. The common specifications, specifications of the example and comparative example, and the simulation method are as follows:

[0033] <Common specifications> Intermediate layer material: 24K glass wool Intermediate layer thickness: 25mm Bone dry density: 24kg / m 3 Specific heat: 840J / kg Thermal conductivity: 0.038W / m Moisture resistance: 0.147m 2 s Pa / μg

[0034] <Example> Outer layer material: Breathable sheet Outer layer thickness: 0.2mm Bone dry density: 920kg / m 3 Specific heat: 2300J / kg Thermal conductivity: 0.33W / m Moisture resistance: 0.13m 2 s Pa / μg

[0035] <Comparative Example> Outer layer material: Polypropylene sheet Outer layer thickness: 0.2mm Bone dry density: 920kg / m 3 Specific heat: 2300J / kg Thermal conductivity: 0.33W / m Moisture resistance: 144m 2 s Pa / μg

[0036] <Moisture permeability simulation> The amount of moisture that moves from the outside to the inside was calculated when the external environment on the outer layer side was set to a temperature of 25°C and humidity of 90%, and the internal environment on the middle layer side was set to a temperature of 12°C and humidity of 90%.

[0037] The results of the simulation are as follows: Example (moisture permeable part): 16g / m 2 h Comparative example (non-moisture permeable part): 0.04 g / m 2 h

[0038] As a result of the simulation, it was confirmed that the amount of moisture that moved from the outside to the inside of the example was approximately 400 times that of the comparative example, and that a duct including a moisture-permeable portion can efficiently dehumidify the space in which the duct is placed.

[0039] [Note] The present invention is as follows.

[0040] [Invention 1] A duct, a cylindrical member having a space therein through which conditioned air can flow, The cylindrical member includes a moisture-permeable portion having moisture permeability that allows moisture outside the cylindrical member to move to the inside of the cylindrical member. duct.

[0041] [Invention 2] The moisture permeable portion includes an outer layer on an outer peripheral surface side, 2. The duct according to claim 1, wherein the outer layer is impermeable to air but permeable to moisture.

[0042] [Invention 3] 3. The duct according to claim 2, wherein the outer layer is formed of a gas-barrier moisture-permeable film.

[0043] [Invention 4] 3. The duct according to claim 2, wherein the outer layer is formed of a variable moisture-permeable, airtight sheet.

[0044] [Invention 5] The moisture permeable portion includes an inner layer on an inner circumferential surface side, 5. The duct according to any one of claims 1 to 4, wherein the inner layer is formed of a nonwoven fabric.

[0045] [Invention 6] 1. A building air conditioning system, comprising: A method for manufacturing a duct system according to any one of claims 1 to 5, comprising: The moisture-permeable portion of the duct is disposed in a buffer space that is a space other than a living room. Air conditioning system.

[0046] [Invention 7] 7. The air conditioning system according to claim 6, wherein the moisture-permeable portion of the duct is provided in a supply path for supplying air conditioned by the air conditioner to the room.

[0047] [Invention 8] 8. The air conditioning system according to claim 6 or 7, wherein the moisture-permeable portion of the duct is provided in an exhaust path for exhausting air from the room to the outdoors.

[0048] [Invention 9] A building comprising an air conditioning system according to any one of claims 6 to 8.

[0049] [Invention 10] A method for air conditioning a building, comprising: An arrangement step of arranging the moisture-permeable portion of the duct according to any one of the first to fifth aspects of the present invention in a buffer space other than a living room; a dehumidifying step of moving moisture in the buffer space to the inside by circulating the conditioned air having a relative humidity lower than that of the buffer space through the inside of the cylindrical member of the duct, Air conditioning method. [Explanation of symbols]

[0050] 7 Duct 7a internal 7b External 9. Cylinder 10 Breathable section

Claims

1. A duct, a cylindrical member having a space therein through which conditioned air can flow, The cylindrical member includes a moisture-permeable portion having moisture permeability that allows moisture outside the cylindrical member to move to the inside of the cylindrical member. duct.

2. the moisture permeable portion includes an outer layer on an outer peripheral surface side, 10. The duct of claim 1, wherein the outer layer is air impermeable but moisture permeable.

3. The duct according to claim 2 , wherein the outer layer is formed of a gas-barrier moisture-permeable film.

4. The duct of claim 2 , wherein the outer layer is formed of a variable moisture-permeable, tight sheet.

5. The moisture permeable portion includes an inner layer on an inner circumferential surface side, The duct of claim 1 , wherein the inner layer is formed of a nonwoven fabric.

6. 1. A building air conditioning system, comprising: A system including the duct according to any one of claims 1 to 5 and an air conditioner for supplying conditioned air to the duct, The moisture-permeable portion of the duct is disposed in a buffer space that is a space other than a living room. Air conditioning system.

7. The air conditioning system according to claim 6, wherein the moisture-permeable portion of the duct is provided in a supply path for supplying air conditioned by the air conditioner to the room.

8. The air conditioning system according to claim 6, wherein the moisture-permeable portion of the duct is provided in an exhaust path for exhausting air from the room to the outdoors.

9. A building comprising an air conditioning system according to claim 6.

10. A method for air conditioning a building, comprising: an arrangement step of arranging the moisture-permeable portion of the duct according to any one of claims 1 to 5 in a buffer space that is a space other than a living room; a dehumidifying step of moving moisture in the buffer space to the inside by circulating the conditioned air having a relative humidity lower than that of the buffer space through the inside of the cylindrical member of the duct, Air conditioning method.

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