Air vent system

Abstract

The present invention provides an air diffuser system that minimizes short-circuiting of conditioned air and maintains the horizontal airflow from the outlet even after it passes below the intake, thereby ensuring sufficient reach of conditioned air within the indoor space. [Solution] The suction plate 20 is positioned so as to sandwich the central air outlet 10 in a unit area 63 of the ceiling 60. The airflow of conditioned air blown out from the air outlet 10 passes directly beneath the plate. The suction plate 20 is provided with multiple elongated openings 21 oriented perpendicular to the direction of the airflow, and vanes 22 are provided protruding from the edges of each opening 21. As the airflow progresses from the air outlet 10 towards the suction plate 20, the vanes 22 prevent the airflow from entering the openings 21 as it approaches them. This allows most of the airflow to continue horizontally beyond the suction plate 20 and be widely diffused into the room.

Description

Technical Field

[0005]

[0001] The present invention relates to an air control port system that is arranged on a ceiling or the like in an indoor space to be air-conditioned, blows conditioned air into the indoor space, and sucks air from the indoor space.

Background Art

[0002] As a method of discharging air for ventilation from an indoor space such as an office and performing smoke exhaust from the indoor space during a fire, a ceiling chamber method that uses the ceiling back space in a double ceiling such as a system ceiling as a ventilation and smoke exhaust chamber is widely adopted. [[ID=​​​​​​​​​​​​​​​​​

[0006] [Patent Document 1] Japanese Patent Publication No. 2001-101907 [Patent Document 2] Japanese Patent Publication No. 2003-173715 [Patent Document 3] Japanese Patent Publication No. 2007-200789 [Patent Document 4] Japanese Patent Publication No. 2002-310493 [Patent Document 5] Japanese Patent Publication No. 2014-137842 [Patent Document 6] Japanese Patent Publication No. 2018-125113 [Overview of the Initiative] [Problems that the invention aims to solve]

[0007] In the conventional ceiling chamber type air diffuser arrangement structure shown in the aforementioned patent document, although the intake and outlet can be efficiently arranged, there is a problem in that a short circuit is likely to occur where some of the conditioned air blown out from the outlet is drawn in through the holes in the lighting fixture because the lighting fixture, which also serves as the intake, and the outlet are adjacent to each other.

[0008] Furthermore, since lighting fixtures generally serve as intake vents in ceilings, if the number of lighting fixtures placed on the ceiling is set to the minimum necessary number for lighting in the room with the ceiling, the number of intake vents in the room may be insufficient. In such cases, there was a problem that the opening area of ​​the ceiling intake vents in the mechanical smoke exhaust system would be insufficient.

[0009] Regarding the former problem, if the outlet is a rectangular multi-layer cone type, changing the outlet from a four-way outlet on each side to a four-way outlet at each corner would reduce the amount of short-circuiting from the outlet to the intake, as conditioned air would not be directed towards the adjacent intake. However, this presented another problem: the air discharged from the corner outlets would be directed diagonally downwards rather than horizontally, raising concerns about drafts in the living area.

[0010] Furthermore, the latter problem was addressed by installing new, independent intake vents in other unit areas of the grid ceiling that lacked lighting fixtures. However, this resulted in increased costs due to the addition of these intake vents, and the difference in design between the generally multi-layer cone-shaped air outlets and the generally grille-shaped intake vents led to a lack of uniformity in the ceiling design.

[0011] The present invention was made to solve the aforementioned problems, and aims to provide an air diffuser system that minimizes short-circuiting of conditioned air discharged from the ceiling outlet to the intake, and maintains the horizontal airflow from the outlet even after passing near the intake, thereby ensuring a sufficient reach of conditioned air in the indoor space. [Means for solving the problem]

[0012] The air diffuser system disclosed in the present invention is a grid-type system ceiling facing an indoor space to be air-conditioned, and employs a ceiling chamber system in which the space above the ceiling is used as a ventilation and smoke exhaust chamber. The air diffuser system is installed in a ceiling, and comprises an outlet for blowing conditioned air supplied from above the ceiling into the indoor space, and a rectangular plate-shaped suction plate with an opening that allows the indoor space to pass through to the space above the ceiling. The outlet is provided in one or more unit areas of each square unit area surrounded on all four sides by a grid-like support frame in the grid-type system ceiling, and is positioned in the central rectangular area of ​​each rectangular area obtained by dividing the unit area into three in the direction of a predetermined frame edge in the support frame, and is capable of blowing conditioned air horizontally in four directions parallel to each frame edge direction of the support frame. The suction plate is provided in one or more of the unit regions, and is positioned in two of the rectangular regions other than the center of each rectangular region obtained by dividing the unit region into three in the direction of a predetermined frame edge in the support frame, with the long and short sides of the suction plate coinciding with the long and short sides of the two rectangular regions, the opening of the suction plate is an elongated hole continuous in the direction of the long side of the suction plate, and multiple openings are provided in the direction of the long and short sides of the suction plate, and a vane is provided protruding from the edge of each opening of the suction plate on the edge closer to the central rectangular region, with the vane being tilted at a predetermined angle of inclination that is acute with respect to the suction plate.

[0013] As described above, according to the disclosure of the present invention, an outlet and two suction plates are arranged in one of the unit areas enclosed by the ceiling support frame, and when the outlet and suction plates are arranged in the same unit area, the suction plates are arranged so as to sandwich the central outlet, and the airflow of conditioned air blown out in four directions from the outlet passes directly beneath the plates. At the same time, the suction plates are provided with multiple elongated openings oriented perpendicular to the direction of the blown airflow, and each opening is provided with a vane protruding from the edge near the outlet towards the ceiling space, so that these vanes can function as obstacles to the airflow blown out from the outlet and flowing into the openings. As a result, while the airflow from the outlet side to the intake plate side is allowed to draw in indoor air into the ceiling space through each opening in the intake plate, the inflow of the airflow that has reached the vicinity of the opening is suppressed by the vanes at the edge of the opening. This allows most of the airflow from the outlet to proceed horizontally beyond the intake plate, widely diffusing the conditioned airflow into the indoor space and efficiently performing air conditioning by replacing the indoor air with conditioned air.

[0014] Furthermore, by allowing the intake plate opening to function as an intake while suppressing the inflow of the discharged airflow into the opening, short-circuiting of the discharged conditioned air is minimized, enabling efficient air conditioning while ensuring sufficient exhaust area for the smoke exhaust opening using the ceiling chamber system, thus allowing for proper exhaust from the room. In addition, it eliminates the need to install a separate intake opening in the ceiling, and by avoiding the mixing of intake and exhaust openings, a sense of unity in the ceiling design is achieved.

[0015] Furthermore, in the air outlet system disclosed in the present invention, if necessary, the vanes of the suction plate are bent upward on the side of the suction plate facing the ceiling space, in the portion surrounded on three sides by linear holes provided along the outer circumference of the opening on three sides, excluding the edge on the side closest to the central rectangular region of the opening, at the location where the plate-shaped body forming the suction plate becomes the opening, and the void portion on the plate-shaped body created by bending the vanes becomes the opening.

[0016] As described above, according to the disclosure of the present invention, the vanes that protrude from the edges of each opening in the suction plate, closer to the central rectangular area, are provided by bending the portion surrounded by linear holes that are pre-provided at the location of the opening in the plate-like body that makes up the suction plate, toward the side of the suction plate facing the ceiling space. At the same time, the void in the plate-like body created by this bending is made into an opening. This eliminates the need to separately provide the vanes and openings in the suction plate, allowing for a simplified provision of vanes and openings. In particular, it reduces the cost associated with providing vanes that do not require any special methods other than bending, thus contributing to a lower cost for the suction plate.

[0017] Furthermore, the air outlet system disclosed in the present invention may be configured such that, if necessary, the openings of the suction plate are arranged in such a way that multiple openings are arranged at equal intervals in the direction of the long side of the suction plate, forming a single row, and this arrangement is the same for all rows of openings arranged in parallel in the direction of the short side of the suction plate, and the number of openings arranged in the direction of the long side of the suction plate is even.

[0018] As described above, according to the disclosure of the present invention, the openings are arranged in a so-called parallel arrangement, where multiple openings are arranged at equal intervals in the long side direction of the suction plate, and this arrangement is repeated multiple times in the short side direction of the suction plate to form multiple rows of openings in parallel. Furthermore, by making the number of openings in the long side direction of the suction plate an even number, and making the center of the long side direction of the suction plate a portion without openings sandwiched between the openings, the point where the airflow of conditioned air is strongest at the center of the long side direction of the suction plate will travel along the portion of the suction plate without openings. This allows the force of the discharged airflow to travel horizontally without weakening as much as possible, ensuring a sufficient reach and enabling more efficient air conditioning of the indoor space.

[0019] In addition, the air intake port system according to the disclosure of the present invention is provided, if necessary, with a plurality of openings in parallel such that the opening of the suction plate has an opening width of 1 / 10 or more of the short side dimension of the suction plate and the overall opening ratio is 30 to 70%.

[0020] According to the disclosure of the present invention as described above, by setting the opening width of the openings in the suction plate and the opening ratio of the entire suction plate to values within an appropriate range, and providing each opening with an appropriate size, the speed of the flow of indoor air sucked into the openings can be suppressed, so that the airflow does not become turbulent on the surface of the suction plate on the indoor space side. The blown airflow from the blowout port portion arranged adjacent to the suction plate toward the suction plate side can smoothly flow along the surface of the suction plate, enabling the blown airflow to surely progress horizontally and obtain a sufficient reach distance, and efficiently performing air conditioning. Further, while making the size of the openings in the suction plate sufficient, by providing the openings so that the opening ratio of the entire plate does not become excessively large, the strength of the suction plate can be ensured, and adverse effects due to insufficient strength such as deformation and vibration can be prevented.

Brief Description of the Drawings

[0021] [Figure 1] It is an explanatory diagram of the arrangement state in a region corresponding to one module of the ceiling of the air intake port system according to an embodiment of the present invention. [Figure 2] It is a bottom view of the air intake port system according to an embodiment of the present invention. [Figure 3] It is a cross-sectional view taken along line A-A of FIG. 2. [Figure 4] It is a cross-sectional view taken along line B-B of FIG. 2. [Figure 5] It is an enlarged view of the blowout port portion in the cross-sectional view taken along line A-A of FIG. 2. [Figure 6] It is an enlarged view of the blowout port portion in the cross-sectional view taken along line B-B of FIG. 2. [Figure 7] It is a partially enlarged view of the suction plate in the air intake port system according to an embodiment of the present invention. [Figure 8] It is an enlarged cross-sectional view taken along line C-C of FIG. 7. [Modes for carrying out the invention]

[0022] The following describes an air vent system according to one embodiment of the present invention, based on Figures 1 to 8. In the figures above, the air diffuser system 1 according to this embodiment is installed on a grid-type system ceiling 60 and is a device that blows conditioned air into the indoor space 80 to be air-conditioned, and also draws in air from the indoor space.

[0023] The ceiling 60 is a so-called grid ceiling constructed based on a predetermined module (for example, a 3.6m x 3.6m module), and a predetermined number of square unit areas 63, surrounded on all four sides by support frames 62 arranged in a grid pattern, are arranged within the area of ​​one module. Ceiling construction components (ceiling materials, lighting fixtures, air conditioning fixtures, etc.) are housed in these unit areas 63 within the frames. For example, if the module is 3.6m x 3.6m, it is common to provide support frames 62 so that 6 x 6 = 36 unit areas 63 are created per module.

[0024] Furthermore, in conjunction with the adoption of a ceiling chamber system that uses the space above the ceiling 65 as a ventilation and smoke exhaust chamber, the ceiling 60 will be provided with an opening that connects the indoor space 80 and the space above the ceiling 65, and serves as an intake for drawing air from the indoor space 80 and smoke in the event of a fire into the space above the ceiling 65. At least a portion of this opening will be provided as an air diffuser system 1.

[0025] Specifically, the air diffuser system 1 according to this embodiment comprises an outlet section 10 disposed in the center of a predetermined unit area 63 in the ceiling 60 and blowing conditioned air supplied from the ceiling space into the room space 80, and a plurality of openings 21 that allow the room space 80 to pass through to the ceiling space 65, and rectangular plate-shaped suction plates 20 arranged on both sides of the outlet section 10.

[0026] The air outlet 10 is positioned in the central rectangular area of ​​a predetermined unit area 63 on the ceiling 60, which is divided into three rectangular areas along predetermined frame edges of the support frame 62. It is then capable of horizontally blowing out conditioned air in four directions parallel to each of the frame edges of the support frame 62.

[0027] More specifically, the air outlet section 10 is formed as a roughly box-shaped body surrounding an opening 11a with a rectangular cross-section, and comprises an air outlet body 11 into which conditioned air for air conditioning is introduced; a central cone 15 disposed in the opening 11a of the air outlet body 11 to guide the conditioned air in a predetermined direction toward the room space; and plate-shaped closing plates 17 disposed to close the spaces between both longitudinal ends of the air outlet body 11 and the support frame 62.

[0028] The air outlet body 11 is formed as a roughly box-shaped body made of a high-strength material such as metal, surrounding an opening 11a with a rectangular cross-section through which conditioned air can pass. An outer cone portion 12 is formed on the part of the air outlet body 11 that expands toward the interior space while maintaining the rectangular cross-sectional shape, and a frame portion 13 is formed that protrudes outward from the lower end of the outer cone portion 12 toward the opening 11a.

[0029] This frame portion 13 is configured such that a portion projecting outward by a predetermined width from the lower end of the outer cone portion 12, on the opposite side from the inner opening 11a, is continuously formed in the circumferential direction to create a roughly flange-like shape, and its outermost periphery is positioned to stand upright.

[0030] The air outlet body 11 is then mounted and fixed on the closing plate 17 by bringing the frame portion 13 into contact with the closing plate 17, and is positioned so that its longitudinal direction is oriented in a predetermined direction with respect to the interior space 80, and is located in the center of the unit area 63 surrounded by the support frame 62, and is attached to the support frame 62 of the ceiling 60 via the closing plate 17, thereby being installed on the ceiling 60 (see Figures 2 to 6).

[0031] Furthermore, the air outlet body 11 has a cylindrical neck portion 14 that is integrally connected to its upper part. The neck portion 14 protrudes upward from the upper part of the air outlet body 11, and is provided so that its interior is in communication with the opening 11a, and is connected to an air supply duct 61 located in the ceiling space 65. Through this neck portion 14, the air outlet body 11 receives conditioned air from the duct 61, and the conditioned air introduced into the opening 11a is blown out into the room space from the lower part of the opening 11a facing the room space, guided by the central cone 15.

[0032] The central cone 15 is formed by arranging and combining multiple vanes of different sizes, each shaped like a truncated pyramid with an expanding cone-like shape, at predetermined intervals. The central cone 15 is positioned in the central part of the opening 11a of the air outlet body 11, closer to the interior space, with the inclined surface of the outermost vane facing the inner surface of the outer cone portion 12 of the air outlet body 11, so that all the vanes expand toward the interior space.

[0033] The central cone 15 guides the conditioned air along the four inclined surfaces of each vane, causing the conditioned air to move in four directions, and creating a state in which the conditioned air is blown out in four directions as a horizontal airflow into the room space from the opening 11a of the outlet body 11. The structure of this inner cone 15 is similar to that of known inner cones used in conventional rectangular multi-layer cone-type air outlets, so a detailed explanation will be omitted.

[0034] In the central cone 15, two flaps of different sizes with an expanding shape are used in combination, but the configuration is not limited to this; it is also possible to use only one flaps or to use three or more flaps in combination.

[0035] The blocking plate 17 is a rectangular plate-like body with a rectangular through-hole in the center that communicates with the opening 11a of the air outlet body 11, and is installed on the ceiling 60 with its longitudinal ends attached to the support frame 62 of the ceiling 60.

[0036] The blocking plate 17 is attached to the support frame 62 with the air outlet body 11 placed on and fixed in place. It blocks the space between both longitudinal ends of the air outlet body 11 and the support frame 62, preventing the circulation of indoor air in this area. It also serves as a kind of decorative frame, covering the frame portion 13 of the air outlet body 11 and the fixing components of the air outlet body 11 from below, making them invisible from the indoor space.

[0037] In the portion of the blocking plate 17 that does not overlap with the air outlet body 11, ceiling-mounted equipment such as emergency alarm equipment (sirens, etc.), speakers for broadcasting equipment, sprinklers, emergency lighting, etc. may be installed. Furthermore, in the portion of the blocking plate 17 that is specifically designated as a place where the airflow from the opening 11a of the air outlet body 11 does not pass nearby, sensors for the indoor space, such as temperature and humidity sensors and CO2 sensors, may be installed.

[0038] Furthermore, if the outlet body has a rectangular opening cross-section that is longer in the longitudinal direction, and the outlet body can be directly attached to the support frame 62 at its longitudinal end, then a configuration without a closing plate is also acceptable.

[0039] The suction plate 20 consists of a rectangular plate-like body with multiple openings 21, which are elongated holes that penetrate through the plate, arranged at predetermined intervals in the direction of the long side and the short side of the plate. Two of these plates are arranged on either side of the air outlet 10 in the ceiling 60.

[0040] The suction plate 20 is positioned in two of the rectangular regions obtained by dividing a predetermined unit region 63 in the ceiling 60 into three sections along a predetermined frame edge direction in the support frame 62, excluding the central region where the air outlet 10 is located. The long and short sides of the suction plate 20 are aligned with the long and short sides of these two rectangular regions.

[0041] The suction plate 20 is installed on the ceiling 60 by attaching its short-side ends (longitudinal ends) to the support frames 62. The suction plate 20 forms part of the ceiling surface, while also functioning as a suction port that directs indoor air into the space above the ceiling through the opening 21.

[0042] Between the suction plate 20 and the outlet section 10 and the closing plate 17, an auxiliary frame 67 made of the same material as the support frame 62 of the ceiling 60 is installed, preventing any gaps from forming.

[0043] Each opening 21 of the suction plate 20 is an elongated hole that is continuous in the direction of the long side of the rectangular suction plate 20, and is provided in a parallel configuration with an opening width of 1 / 10 or more of the short side dimension of the suction plate 20, and an overall opening ratio of 30 to 70%.

[0044] By providing each opening 21 to be of an appropriate size relative to the intake plate 20, the velocity of the indoor air flowing into the openings 21 is suppressed, preventing turbulence in the airflow on the indoor space side surface of the intake plate 20. This allows the discharged airflow from the adjacent outlet 10 toward the intake plate 20 to flow smoothly along the surface of the intake plate 20. Furthermore, by providing the openings 21 in such a way that the overall opening ratio of the intake plate 20 does not become excessively large, the strength of the intake plate 20 is sufficiently ensured.

[0045] The suction plate 20 is configured in a so-called parallel type, in which the arrangement (pattern) of the elongated openings 21 is the same for any of the multiple rows of openings 21 in the direction of the short side of the plate, with multiple rows of openings 21 arranged at equal intervals in the direction of the long side of the plate. Furthermore, the number of openings 21 in the suction plate 20 arranged in the direction of the long side of the plate is set to two.

[0046] With this arrangement of openings 21, the center position in the long-side direction of the suction plate 20 is the area between the openings 21 where there are no openings 21. As a result, the point where the airflow of conditioned air blown from the outlet 10 to the suction plate 20 is strongest, at the center in the long-side direction of the plate, travels along the area of ​​the suction plate 20 where there are no openings 21. This allows the blown airflow to travel horizontally without losing too much force, ensuring sufficient reach and enabling more efficient air conditioning of the indoor space.

[0047] The suction plate 20 is configured with two openings 21 arranged side by side in the direction of the long side of the plate, but it is not limited to this configuration. If the center position in the direction of the long side of the suction plate is a part where there are no openings, the number of openings arranged in the direction of the long side of the plate may be four or more, which is an even number.

[0048] The suction plate 20 is provided with vane plates 22 that protrude towards the ceiling space 90 from the edge of its opening 21, specifically from the part closer to the central rectangular area in the unit area 63, that is, the part closer to the air outlet 10 (see Figure 8).

[0049] The vane 22 is provided by bending the portion surrounded on three sides by linear holes that are pre-made in the plate-shaped body forming the suction plate 20, to a predetermined angle on the side of the suction plate 20 facing the space above the ceiling.

[0050] The holes defining the vane portions are located at the openings 21 of the plate-like body that make up the suction plate 20, and are provided in a shape that follows the outer circumference of the opening on three sides, excluding the edge closest to the air outlet portion 10. The portion surrounded by these notches forms the vane 22, while the voids on the plate-like body created by the bending and straightening of the vane 22 become the openings 21. Due to this arrangement, the vane plate 22 is slightly smaller than the size of the opening 21 by the width of the hole.

[0051] The vane 22 is tilted at a predetermined angle of inclination that is acute with respect to the suction plate 20. This angle of inclination is preferably 30 to 60°, and more preferably 45°. However, the angle of inclination of the vane 22 relative to the intake plate 20 can be changed to alter how easily air passes through the indoor space at the opening 21, thereby adjusting the amount of air intake.

[0052] Specifically, the user can operate the vane 22 through the opening 21 of the intake plate 20 from the indoor space to move it and adjust the tilt angle of the vane 22. This allows the user to arbitrarily adjust the angle between the vane 22 and the intake plate 20, thereby widening the gap between the vane 22 and the opening 21, increasing the degree of opening of the opening 21 on the ceiling space side, making it easier for indoor air to pass into the ceiling space, or to decrease the angle between the vane 22 and the opening 21, narrowing the gap between the vane 22 and the opening 21, decreasing the degree of opening of the opening 21, making it more difficult for indoor air to pass into the ceiling space.

[0053] Next, the discharge and suction conditions in the air diffuser system based on the above configuration will be described. As a premise, it is assumed that conditioned air is continuously supplied to the outlet 10 through the duct 61 in the ceiling space.

[0054] Furthermore, by employing a ceiling chamber system, the space above the ceiling 65 is under low pressure due to suction by an exhaust device (not shown) connected to it, and air from the relatively high-pressure indoor space 80 is gradually drawn in through each opening 21 of the suction plate 20.

[0055] Due to suction from the ceiling space 65 side through the openings 21 of the suction plate 20, indoor air moves upward through each opening 21 of the suction plate 20, passes through the openings 21, reaches the ceiling space, and then proceeds towards the exhaust side such as the exhaust device.

[0056] Meanwhile, in the air outlet section 10, the conditioned air supplied from the duct 61 proceeds through the neck section 14 at the top of the air outlet body 11 to the opening 11a of the air outlet body 11, and reaches the central cone 15 located closer to the interior space in the rectangular opening 11a.

[0057] The conditioned air that reaches the inner cone 15 then travels between the outer cone section 12 and the inner cone 15, and between each blade of the inner cone 15, guided by each blade, and changing direction from downward to sideways according to the inclination of the blades, and then splits into four directions according to the rectangular expanding shape of each blade, before being blown out as a horizontal airflow into the interior space 80 from the lower part of the opening 11a.

[0058] In this way, of the conditioned air discharge flow guided by the central cone 15 and directed in four directions, the airflow discharged towards the two suction plates 20 adjacent to the outlet 10 proceeds beneath the suction plates 20.

[0059] In the intake plate 20, each of the multiple openings 21 is sufficiently large and arranged together rather than dispersed, resulting in a gentle intake of indoor air and minimizing turbulence of the airflow on the surface of the intake plate 20. Thus, the influence of indoor air intake on the horizontal movement of the discharge airflow is small, allowing the discharge airflow to travel horizontally along the intake plate 20 that forms the ceiling surface.

[0060] Furthermore, in the suction plate 20, each opening 21 is an elongated hole that is continuous in the direction of the long side of the plate, and the size of the opening in the direction of travel of the discharged airflow from the outlet 10 is relatively small, making it difficult for the discharged airflow to flow in.

[0061] Furthermore, in the intake plate 20, the arrangement of the vanes 22 relative to each opening 21 causes the vanes 22 to act as a resistance even if there is a tendency for the discharged airflow to move towards the space above the ceiling. This suppresses the flow of the discharged airflow into the space above the ceiling 65, making it less likely for the conditioned air to directly enter the space above the ceiling 65 through a short circuit.

[0062] In contrast, if a lighting fixture is installed in the same position as conventionally at the location of the intake plate 20, the opening on the ceiling surface of the lighting fixture is made large enough to allow light to pass through the intake holes provided on the back of the lighting fixture, etc. As a result, the intake of indoor air towards the lighting fixture near the ceiling surface is gentle, and airflow turbulence is unlikely to occur. Therefore, the discharged airflow is not greatly affected by the intake of indoor air by the lighting fixture and can proceed horizontally along the ceiling surface. However, because the opening on the ceiling surface of the lighting fixture is large, there is also less resistance to the discharged airflow from the outlet. As a result, it is not possible to prevent the discharged airflow from entering the opening of the lighting fixture and proceeding into the space above the ceiling, and it was known that the proportion of short-circuiting of conditioned air was relatively high.

[0063] In addition, for example, if a general perforated plate is used instead of the intake plate 20, the numerous holes distributed on the perforated plate are small, and the resistance to airflow is large, making it difficult for the discharged airflow to pass through each hole and head towards the space above the ceiling. However, it has been found that indoor air is drawn in at each of the numerous holes distributed on the perforated plate, causing turbulence in the airflow on the indoor surface (ceiling surface) of the perforated plate. As a result, the discharged airflow does not easily flow along the surface of the perforated plate, and a horizontal airflow cannot be obtained.

[0064] By using the suction plate 20 of this embodiment, even when conditioned air is being blown out from the outlet 10 and indoor air is being drawn in through the opening 21 of the suction plate 20, it is possible to suppress short-circuiting of the conditioned air blown out from the outlet 10 as a horizontal airflow into the ceiling space 65 through the opening 21 of the suction plate 20, and to maintain the horizontal movement of the blown airflow along the suction plate 20, thereby ensuring the amount and distance of conditioned air reaching the indoor space.

[0065] Furthermore, when the airflow velocity along the ceiling surface is high or the flow rate is large, if there is a through-hole in the ceiling surface, the airflow along the ceiling surface will usually draw in air from the other side of the ceiling surface, i.e., the space above the ceiling, through the through-hole, and this air is likely to mix with the airflow.

[0066] However, in the structure of the suction plate 20 of this embodiment, even if an apparent force is generated by the airflow from the outlet 10 that attempts to draw air from the ceiling space 65 to the room space 80 through the opening 21, the presence of the vane 22 on the edge near the outlet 10 prevents the force attempting to draw air from the ceiling space 65 from effectively acting, and no airflow toward the room space 80 through the opening 21 occurs. As a result, no draw occurs.

[0067] In the case of heating, where warm conditioned air is blown out from the outlet 10, the airflow of conditioned air blown out from the outlet 10 is warm and has a low density, making it relatively easy to rise relative to the indoor air. As a result, when it passes under the intake plate 20, it easily enters the opening 21 of the intake plate 20. Therefore, compared to the case of cooling, the proportion of short circuits in the intake plate 20 where conditioned air reaches the ceiling space 65 through the opening 21 is slightly increased. However, due to the resistance of the vanes 22 at the edge of the opening 21, the proportion of short circuits can be kept smaller than in the case of intake in conventional lighting fixtures.

[0068] As described above, in the air diffuser system according to this embodiment, an outlet section 10 and two suction plates 20 are arranged in a predetermined unit area 63 surrounded by a support frame 62 of the ceiling 60. The suction plates 20 are positioned so as to sandwich the central outlet section 10, and the airflow of conditioned air blown out in four directions from the outlet section 10 passes directly beneath the plates. At the same time, the suction plates 20 are provided with multiple elongated openings 21 oriented perpendicular to the direction of the blown airflow. Furthermore, vanes 22 are provided on the edge of each opening 21 closest to the outlet section 10, protruding towards the ceiling space 65. These vanes 22 function as obstacles to the airflow from the outlet section 10 inflowing into the openings 21. As a result, while the airflow from the outlet 10 to the intake plate 20 is allowed to draw in indoor air into the ceiling space 65 through each opening 21 of the intake plate 20, the inflow of the airflow that has reached the vicinity of the opening 21 into the opening 21 is suppressed by the vane 22 at the edge of the opening 21. This allows most of the airflow from the outlet 10 to proceed horizontally beyond the intake plate 20, widely diffusing the conditioned airflow into the indoor space and efficiently performing air conditioning by replacing the indoor air with conditioned air.

[0069] Furthermore, by allowing the opening 21 of the intake plate 20 to function as an intake port while suppressing the inflow of the discharged airflow into the opening 21, short-circuiting of the discharged conditioned air is minimized, enabling efficient air conditioning while ensuring that the exhaust opening area of ​​the ceiling chamber system is secured, allowing for proper exhaust from the room. In addition, it eliminates the need to provide a separate intake port in the ceiling 60, and by avoiding the mixing of such intake and exhaust ports, a sense of unity in the ceiling design is achieved.

[0070] In the air outlet system according to the above embodiment, the arrangement (pattern) of the elongated openings 21 in the suction plate 20 is a so-called parallel type, that is, multiple openings 21 are arranged in a row in the direction of the long side of the plate at equal intervals, and this configuration is the same for any of the multiple rows of openings 21 in the direction of the short side of the plate. However, the system is not limited to this, and it is also possible to provide the openings in a so-called staggered arrangement, where each row is shifted by 1 / 2 of the arrangement pitch of the openings in the direction of the long side of the plate from the arrangement of the adjacent row.

[0071] Furthermore, while the configuration shows an even number of openings 21 arranged in the direction of the long side of the plate in the suction plate 20, such as two, it is not limited to this, and a configuration in which an odd number of openings 21 are arranged in the direction of the long side of the plate is also acceptable.

[0072] Furthermore, while the air vent system according to the above embodiment shows an example in which the outlet section 10 and the suction plate 20 are combined and provided in the same unit area 63, the system is not limited to this. In addition to the outlet section and suction plate that make up the air vent system, the outlet section that is not combined with the suction plate may be provided in the unit area, or the suction plate that is not combined with the outlet section may be provided in the unit area. For example, as shown in Figure 1, in addition to providing the outlet section 10 and the suction plate 20 in combination in a predetermined unit area 63 on the ceiling, the outlet section 10 can also be combined with a conventional lighting fixture with a suction function 70 and provided in a different unit area to ensure an appropriate arrangement of lighting fixtures and outlets on the ceiling.

[0073] Furthermore, in the air outlet system according to the above embodiment, the neck portion 14 of the outlet body 11 is formed as a cylindrical body, but the system is not limited to this. The neck portion can also be formed as a cylindrical body with an oval opening cross-section, for example, a roughly elliptical shape, or more precisely, an oval opening cross-section with a straight outer edge in the intermediate portion sandwiched between semicircular portions at the ends along the long axis. In this case, because the neck portion has an oval opening cross-section, the opening of the neck portion can be brought sufficiently close to the ends in the long side direction of the rectangular opening of the outlet body. In this way, in the case of a neck portion with a circular opening cross-section, the conditioned air can reach the ends of the opening, which are far from the neck portion and difficult for the conditioned airflow to reach, without any problems by using a neck portion with an oval opening cross-section, thereby enabling more efficient conditioned air discharge.

[0074] Furthermore, in the air outlet system according to the above embodiment, the outlet body 11 and the inner cone 15 in the outlet section 10 are configured to be rectangular in plan view, but the system is not limited to this, and the outlet body and the inner cone may be configured to be rectangular in plan view.

[0075] Furthermore, in the air diffuser system according to the above embodiment, the closing plate 17 that supports the outlet body 11 of the outlet section 10 is installed on the ceiling 60 by attaching its short side end (long side end) to a support frame 62 parallel to the short side. However, the system is not limited to this configuration, and the long side end of the closing plate can also be attached to an auxiliary frame provided next to the outlet section and installed on the ceiling.

[0076] Similarly, in the above embodiment, the suction plate 20 is installed on the ceiling 60 by attaching its short-side end (long-side end) to a support frame 62 parallel to the short side. However, it is not limited to this configuration, and the long-side end of the suction plate, the end closer to the air outlet, may be attached to an auxiliary frame provided next to the air outlet, while the end further from the air outlet may be attached to a support frame parallel to the long side, and installed on the ceiling. [Explanation of symbols]

[0077] 1. Air vent system 10 Air outlet section 11 Air outlet body 11a opening 12 Outer cone section 13. Frame section 14. Neck section 15 medium cones 17. Blockage plate 20 Suction Plate 21 Aperture 22 feather board 60 Ceiling 61 Duct 62 support frames 63 Unit Areas 65 Attic space 67 Auxiliary slots 70 Lighting fixtures 80 Indoor space

Claims

1. In a grid-type system ceiling facing an indoor space to be air-conditioned, and employing a ceiling chamber system in which the space above the ceiling is used as a ventilation and smoke exhaust chamber, an air diffuser system is installed in the ceiling, An outlet that blows conditioned air supplied from the ceiling space into the room space, It includes a rectangular plate-shaped suction plate with an opening that allows the interior space to connect to the space above the ceiling, The aforementioned air outlets are provided in one or more of the square unit regions enclosed on all four sides by a grid-like support frame in a grid-type system ceiling, and are positioned in the central rectangular region of each of the three rectangular regions obtained by dividing the unit region in the predetermined frame direction of the support frame, enabling the horizontal discharge of conditioned air in all four directions parallel to the frame direction of the support frame. The suction plate is provided in one or more of the unit regions, and is positioned in two of the rectangular regions other than the center of each rectangular region obtained by dividing the unit region into three parts in the direction of a predetermined frame edge in the support frame, and the long and short sides of the suction plate are aligned with the long and short sides of the two rectangular regions. The openings of the suction plate are elongated holes that are continuous in the direction of the long side of the suction plate, and multiple such openings are provided in the direction of both the long and short sides of the suction plate. Of the edges around each opening in the aforementioned suction plate, the edge closest to the central rectangular region is provided with a fin-like plate that protrudes from that edge toward the ceiling space. The vane is provided at a predetermined inclination angle that is acute with respect to the suction plate. A distinctive feature is the air vent system.

2. In the air outlet system according to claim 1, The vanes of the suction plate are provided such that, at the location of the opening of the plate-shaped body forming the suction plate, the portion surrounded on three sides by linear holes, which are shaped to follow the outer circumference of the opening on three sides, excluding the edge closest to the central rectangular region of the opening, is bent upwards toward the side of the suction plate facing the space above the ceiling. The gaps in the plate-like body created by bending and straightening the aforementioned vane are to be made into the opening. A distinctive feature is the air vent system.

3. In the air outlet system according to claim 1, The openings of the suction plate are arranged such that multiple openings are spaced equally apart in a row along the long side of the suction plate, and this arrangement is the same for all rows of openings arranged in parallel along the short side of the suction plate, and the number of openings arranged along the long side of the suction plate is even. A distinctive feature is the air vent system.

4. In the air outlet system according to claim 1, The openings of the aforementioned suction plates are arranged in a parallel configuration such that the opening width is 1 / 10 or more of the short side dimension of the suction plate, and the overall opening ratio is 30 to 70%. A distinctive feature is the air vent system.

Images