Duct equipment

Abstract

To suppress variation in distribution ratio of air volume to each branch duct from a distribution chamber that has taken drifted air in a duct device.SOLUTION: A duct device 10 includes a distribution chamber 30 provided with: an introduction port 40 for conditioned air; and a plurality of branch ports 41-46. Branch ducts 81-86 respectively extend from the branch ports 41-46. A current plate 60 with a vent hole 61 is installed in the distribution chamber 30 so as to face the branch ports 41-46.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a duct system for use in air conditioning facilities in buildings, and more particularly to a duct system for distributing conditioned air from an air conditioner in multiple directions. [Background technology]

[0002] Generally, buildings such as office buildings are equipped with air conditioning equipment including an air conditioner and a duct system (see Patent Document 1, etc.). The duct system disclosed in Patent Document 1 includes an inlet duct extending from the air conditioner, a distribution chamber, and multiple branch ducts. The distribution chamber is formed, for example, in a cylindrical shape. One inlet and multiple branch ports are provided on the peripheral wall of the distribution chamber, spaced apart from each other in the circumferential direction of the peripheral wall. The tip of the inlet duct is connected to the inlet. A branch duct extends from each branch port to a corresponding air-conditioning area. Conditioned air from the air conditioner passes through the inlet duct, is distributed to the multiple branch ducts in the distribution chamber, and is supplied to each air-conditioning area. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-142049 Summary of the Invention [Problem to be solved by the invention]

[0004] In this type of duct system, the distribution ratio of the air volume from the distribution chamber into which the biased air is taken to each branch duct can become uneven. In particular, when an opening adjustment damper is installed in the inlet duct, the distribution ratio tends to vary depending on the opening degree. In view of the above circumstances, an object of the present invention is to suppress variations in the distribution ratio of air volume from a distribution chamber to each branch duct in a duct device. [Means for solving the problem]

[0005] In order to solve the above problems, the duct device according to the present invention is a distribution chamber provided with an inlet for conditioned air and a plurality of branch ports; a plurality of branch ducts extending from the plurality of branch ports, respectively; a straightening plate having a large number of vent holes for passing air therethrough and provided inside the distribution chamber so as to face the plurality of branch ports; The present invention is characterized by the following. This makes it possible to reduce variations in the distribution ratio of the air volume from the distribution chamber to each branch duct in the duct device.

[0006] The rectifying plate is preferably provided with a transmission area including at least a part of the air holes, and a non-perforated shielding area having a width greater than the spacing between the air holes. It is more preferable that the transmission regions and the blocking regions are alternately arranged along the direction in which the plurality of branch ports are arranged. It is more preferable that the transmission regions and the blocking regions are alternately arranged along the direction in which the plurality of branch ports are arranged and along a direction perpendicular to the direction in which the plurality of branch ports are arranged. This makes it possible to more reliably suppress variations in the distribution ratio of the air volume from the distribution chamber to each branch duct.

[0007] It is preferable that the current vane is spaced apart from the branching port inside the distribution chamber. This makes it possible to suppress variations in the distribution ratio of the air volume from the distribution chamber to each branch duct while suppressing an increase in flow resistance.

[0008] It is preferable that a heat insulating layer is provided on the inner or outer surface of the housing of the distribution chamber, and the current plate is insulated from the outside of the distribution chamber. The support material for the rectifying plate may be held by a heat insulating layer on the inner surface of the housing, thereby thermally isolating the support material from the housing. The support material of the rectifying plate is connected to the housing, and holes for suppressing heat transfer may be formed in the support material. The housing may be insulated from the exterior by an insulating layer on the exterior surface of the housing, thereby insulating the baffles inside the housing from the exterior of the distribution chamber.

[0009] The duct device includes an inlet duct whose tip is connected to the inlet port and which introduces the conditioned air into the distribution chamber; It is preferable that the air conditioner further comprises an air volume adjusting mechanism interposed between the introduction duct and the introduction port or in the middle of the introduction duct. The air volume adjusting mechanism can adjust the total volume of conditioned air. The duct system can reduce variations in the distribution ratio of air volume to each branch duct, regardless of the total volume of air. [Effects of the Invention]

[0010] According to the present invention, it is possible to suppress variations in the distribution ratio of the air volume from the distribution chamber to each branch duct in the duct device. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a plan view of a building air conditioning system including a duct system according to one embodiment of the present invention. [Figure 2] FIG. 2 is a perspective view of the distribution chamber of the duct system. [Figure 3] FIG. 3 is a plan cross-sectional view of the distribution chamber at a height along line III-III in FIG. [Figure 4] FIG. 4 is a cross-sectional front view of the distribution chamber taken along line IV-IV of FIG. [Figure 5] FIG. 5 is an exploded front view showing an example of a straightening plate of the distribution chamber along the VV curve of FIG. [Figure 6] FIG. 6 is an exploded front view showing a modified example of the current plate. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the air conditioning equipment 2 of the building 1 includes an air conditioner 3 and a duct system 10. The duct system 10 includes an inlet duct 11, an opening adjustment damper 20, a distribution chamber 30, and a plurality of branch ducts 81-86. The inlet duct 11 extends from the air conditioner 3 and is connected to the distribution chamber 30. A plurality of (six in this example) branch ducts 81-86 extend from the distribution chamber 30. The tip of each branch duct 81-86 is connected to the outlets 91-96 of the corresponding air-conditioned areas 1a-1f.

[0013] As shown in Figure 1, an opening adjustment damper 20 is interposed between the inlet duct 11 and an inlet 40 (described later) of the distribution chamber 30 as an air volume adjustment mechanism. The opening adjustment damper 20 includes, for example, two semicircular rotary blades 21. The opening of the inlet 40 is adjusted by the rotation angle of the rotary blades 21, and the air volume of the conditioned air is adjusted.

[0014] As shown in Fig. 2, the distribution chamber 30 is formed in the shape of a cylindrical container with a lid and a bottom. As shown in Fig. 3, the distribution chamber 30 includes a housing 31 and a heat insulating layer 50. As shown in Figs. 3 and 4, the housing 31 includes a cylindrical peripheral wall 32, a top plate 33 that closes the upper end of the peripheral wall 32, and a bottom plate 34 that closes the bottom of the peripheral wall 32. The peripheral wall 32, the top plate 33, and the bottom plate 34 are made of metal plates such as steel plates.

[0015] As shown in Fig. 2, the peripheral wall 32 is provided with one inlet 40 and multiple (six in this example) branch ports 41 to 46. The inlet 40 is formed of a short pipe and protrudes radially outward from the peripheral wall 32. As shown in Fig. 1, the outlet portion of the opening adjustment damper 20 is connected to the inlet 40.

[0016] As shown in Fig. 2, each of the branch ports 41-46 is formed by a short pipe having a smaller diameter than the inlet port 40, and protrudes radially outward from the peripheral wall 32. The branch ports 41-46 are biased to approximately half the circumference of the peripheral wall 32 on the side opposite the inlet port 40, and are dispersed from one another in the circumferential and axial directions (up and down in Fig. 2) of the peripheral wall 32. The upstream ends of the branch ducts 81-86 are connected to each of the branch ports 41-46.

[0017] As shown in FIGS. 3 and 4, an insulating layer 50 is provided on the inner surface of the housing 31. Examples of materials for the insulating layer 50 include foamed resins such as urethane, as well as glass wool. The insulating layer 50 includes a peripheral layer 52, a top layer 53, and a bottom layer 54. The peripheral layer 52 is held on the inner surface of the peripheral wall 32. The inner ends of the inlet 40 and the branch ports 41 to 46 pass through the peripheral layer 52 and face the inner space of the distribution chamber 30. The inner ends of the inlet 40 and the branch ports 41 to 46 are approximately flush with the inner surface of the peripheral layer 52. The top layer 53 is held on the inner surface (lower surface) of the top plate 33. The bottom layer 54 is held on the inner surface (upper surface) of the bottom plate 34. Instead of or in addition to the heat insulating layer 50 on the inner surface of the housing 31, a heat insulating layer 51 may be provided on the outer surface of the housing 31, as shown by the two-dot chain line in Fig. 2. The entire outer surface of the housing 31 may be covered with the heat insulating layer 51.

[0018] 3 and 4, a straightening plate 60 is provided inside the distribution chamber 30. The straightening plate 60 is made of a perforated plate such as a mesh or punched metal having a large number of air holes 61 that allow air to pass through, and is curved to have a semi-cylindrical (partially cylindrical) shape that is coaxial with the distribution chamber 30.

[0019] As shown in FIG. 3, a semi-cylindrical straightening vane 60 is provided in the distribution chamber 30, along approximately half the circumference where the branch ports 41-46 are arranged, so as to face these branch ports 41-46. The straightening vane 60 is spaced from the branch ports 41-46 and the peripheral layer 52 toward the inside (center) of the distribution chamber 30. The radius of curvature of the straightening vane 60 is smaller than the radius of the inner peripheral surface of the peripheral layer 52. The distance D between the inner ends of the branch ports 41-46 and the inner peripheral surface of the peripheral layer 52 and the straightening vane 60 is preferably several mm to several tens of mm, and more preferably 30 mm to 40 mm. A flow division space 35 is formed between the straightening vane 60 and the peripheral layer 52.

[0020] As shown in the developed view of Figure 5, the rectifying plate 60 is preferably provided with perforated transmission regions 62 and non-perforated shielding regions 63. Ventilation holes 61 are formed only in the transmission regions 62. Each transmission region 62 includes at least a portion of all the ventilation holes 61 of the rectifying plate 60. No ventilation holes 61 are formed in the shielding regions 63. Alternatively, ventilation holes 61 are formed over the entire area of ​​the rectifying plate 60, and the ventilation holes 61 in the shielding regions 63 are blocked by covering the portions that will become the shielding regions 63 with a hole blocking material (not shown). The width W of the shielding regions 63 along the circumferential direction of the distribution chamber 30 (the left-right direction in Figure 5) 63 is the arrangement interval P of the ventilation holes 61 61 More preferably, it is several times larger (W 63 >P 61 The transmitting regions 62 and the blocking regions 63 are alternately arranged along the circumferential direction of the rectifying plate 60 (the direction in which the branch ports 41 to 46 are arranged). The transmitting region 62 is divided into two in the axial direction of the rectifying plate 60. A blocking region 63 is interposed between adjacent transmitting regions 62.

[0021] 3 and 5, the central portion of the rectifying plate 60 in the circumferential direction faces the inlet 40. The arrangement of the transmission regions 62 does not necessarily have to correspond to the arrangement of the branch ports 41 to 46. As shown in Fig. 6, the transmission regions 62 and the shielding regions 63 may be arranged alternately in the circumferential direction and height direction of the rectifying plate (the direction in which the branch ports 41 to 46 are arranged and the direction perpendicular to the arrangement direction). In other words, the transmission regions 62 and the shielding regions 63 may be arranged in a staggered pattern.

[0022] As shown in FIG. 4 , the current vane 60 is supported by upper and lower support members 70. Each of the upper and lower support members 70 includes a support ring 71 and multiple (three in this example) support arms 72. The support rings 71 and support arms 72 are made of metal such as steel. The support rings 71 are formed in an annular shape with an L-shaped cross section, including a horizontal portion 73 and a vertical portion 74. The support ring 71 of the upper support member 70 is attached to a corner portion 55 formed by the upper end surface and inner peripheral surface of the peripheral layer 52, and the horizontal portion 73 is sandwiched between the upper end surface of the peripheral layer 52 and the top layer 53. The support ring 71 of the lower support member 70 is attached to a corner portion 56 formed by the lower end surface and inner peripheral surface of the peripheral layer 52, and the horizontal portion 73 is sandwiched between the lower end surface of the peripheral layer 52 and the bottom layer 54. As a result, the upper and lower support members 70 are each held by the heat insulating layer 50 .

[0023] 3, the outer diameter of the horizontal portion 73 of each support member 70 is smaller than the inner diameter of the peripheral wall 32. The outer peripheral edge of the horizontal portion 73 is spaced radially inward from the peripheral wall 32. Therefore, each support member 70 and the housing 31 are spaced apart and thermally isolated from each other.

[0024] As shown in Fig. 3, a plurality of (three) support arms 72 are arranged circumferentially spaced apart from each other on each of the upper and lower support rings 71. As shown in Fig. 4, each support arm 72 is joined to a vertical portion 74 and protrudes radially inward. The upper end of the current plate 60 is joined to the protruding end of the support arm 72 of the upper support member 70. The lower end of the current plate 60 is joined to the protruding end of the support arm 72 of the lower support member 70. In this way, the current plate 60 is held to the insulating layer 50 via the support portions 70. The current plate 60 and the housing 31 are thermally isolated from each other.

[0025] In the air conditioning equipment 2, conditioned air from the air conditioner 3 passes through the inlet duct 11, has its air volume adjusted by the opening adjustment damper 20, and is then introduced into the distribution chamber 30 from the inlet 40. Furthermore, the conditioned air is distributed to each of the branch ducts 81-86 in the distribution chamber 30, and is supplied to each of the air-conditioned areas 1a-1f from each of the blowout sections 91-96.

[0026] Within the distribution chamber 30, the conditioned air from the inlet 40 tends to flow toward the branch ports 43, 44 at the front. This flow is diffused in the circumferential direction of the distribution chamber 30 by the straightening plate 60. This makes it possible to suppress variations in the air volume distribution ratio to the branch ports 41-46 and ultimately to the branch ducts 81-86. In particular, regardless of the opening degree of the opening degree adjustment damper 20, the variation in the air volume distribution ratio can be reliably suppressed.

[0027] The straightening plate 60 has the transmission areas 62 and the shielding areas 63 arranged alternately in the circumferential direction of the distribution chamber 30, so that the flow of conditioned air can be reliably diffused in the circumferential direction. This makes it possible to further reliably suppress variations in the airflow distribution ratio. The rectifying plate 60 is positioned away from each of the branch ports 41 to 46, and a flow dividing space 35 is formed between the rectifying plate 60 and the branch ports 41 to 46, so that the airflow that has passed through each of the air vents 61 of the rectifying plate 60 is also diffused in the flow dividing space 35. This makes it possible to further reduce variations in the airflow distribution ratio and to prevent an increase in flow resistance. The conditioned air can also flow into the flow division space 35 from between both circumferential ends of the straightening vane 60 and the peripheral layer 52. Therefore, a sufficient amount of air can be secured to the side branch ports 41, 46, and variations in the air volume distribution ratio can be reliably suppressed.

[0028] Since the metal housing 31 has heat insulating layers 50, 51 on the inner or outer surface thereof, the distribution chamber 30 can be kept insulated and warm. Furthermore, since the support material 70 of the rectifying plate 60 is separated from the housing 31, the support material 70 and the housing 31, and ultimately the rectifying plate 60 and the housing 31, can be thermally isolated, further improving the insulation and heat retention properties.

[0029] The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the invention. For example, the opening adjustment damper 20 may be interposed in the middle of the inlet duct 11 . Rotating vane 21 may be provided with a large number (plurality) of opening / closing holes. The opening degree of each opening / closing hole may be adjustable independently or in conjunction with each other. The opening degree of inlet 40 may be adjusted not only by the rotation angle of rotating vane 21 but also by the opening degree of the opening / closing holes, thereby adjusting the flow rate of conditioned air. The opening adjustment damper 20 may have one circular rotary vane instead of the two semicircular rotary vanes 21. Furthermore, the air volume adjusting mechanism is not limited to an opening adjustment damper with rotary blades, but may also be an openable / closable lid that can be expanded and contracted. The number of branch ports and branch ducts is not limited to six, but may be five or less, or seven or more, as long as it is two or more. The shape of the distribution chamber 20 is not limited to a cylindrical shape, but may be a square or other rectangular cylindrical shape. The support ring 71 may be omitted. The support arm 72 may be extended to the housing 31. The support arm 72 may be connected to the housing 31. In this case, it is preferable to form holes in the support arm 72 to suppress heat transfer. [Industrial Applicability]

[0030] The present invention can be applied to air conditioning equipment in, for example, office buildings, factories, and the like. [Explanation of symbols]

[0031] 1. Building 2 Air conditioning equipment 3 Air conditioner 10 Duct equipment 11 Inlet duct 20 Opening adjustment damper (air volume adjustment mechanism) 21 Rotating blades 30 Distribution Chamber 31 Case 32 Peripheral wall 33 Top plate 34 Bottom plate 35 Diversion space 40 entrance 41~46 Branch 50 Inner insulation layer 51 Outer insulation layer 52 Surrounding layer 53 Top layer 54 Bottom layer 60 Rectifier plate 61 Ventilation hole 62 Transparent area 63 Shield area 70 Support material 71 Support ring 72 Support arm 81~86 Branch duct

Claims

1. a distribution chamber provided with an inlet for conditioned air and a plurality of branch ports; a plurality of branch ducts extending from the plurality of branch ports, respectively; a straightening plate having a large number of vent holes for passing air therethrough and provided inside the distribution chamber so as to face the plurality of branch ports; the distribution chamber is cylindrical, the straightening vane is provided with permeable regions including at least some of the air vents and non-perforated shielding regions having a width greater than the spacing between the air vents, the permeable regions and the shielding regions are arranged alternately along the arrangement direction of the plurality of branch ports, the plurality of branch ports are arranged in a half-circumferential portion of the distribution chamber on the opposite side to the inlet in the circumferential direction, and the straightening vane is semi-cylindrical and follows the half-circumferential portion of the distribution chamber.

2. 2. The duct system according to claim 1, wherein the transmission areas and the blocking areas are alternately arranged along the arrangement direction of the plurality of branch ports and along a direction perpendicular to the arrangement direction.

3. 3. The duct apparatus according to claim 1, wherein the flow straightening vane is spaced apart from the branching port toward the inside of the distribution chamber.

4. A duct device described in any one of claims 1 to 3, characterized in that an insulating layer is provided on the inner or outer surface of the housing of the distribution chamber, and the straightening plate is insulated from the outside of the distribution chamber.

5. an inlet duct whose tip is connected to the inlet port and which introduces the conditioned air into the distribution chamber; an airflow adjustment mechanism interposed between the introduction duct and the introduction port or in the middle of the introduction duct; The duct device according to any one of claims 1 to 4, characterized in that it comprises:

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