Building air conditioning system

Abstract

To provide an air conditioning system that can efficiently air-condition the workspace within a large building without increasing the size of the air outlet components. [Solution] An air conditioning system for air conditioning a workspace (S1) inside a building (100), comprising an air conditioner (2) installed inside the building and a discharge member (4) connected to the air supply port of the air conditioner via a duct (3), wherein the discharge member has an inlet (40) into which conditioned air flows in, an outlet (42) that blows the conditioned air that has flowed into the inlet toward the floor surface (102), and a plurality of discharge holes (41) provided between the inlet and the outlet that blow out a portion of the conditioned air that has flowed into the inlet in a horizontal direction.

Description

Technical Field

[0001] The present invention relates to an air conditioning system for buildings, and particularly to an air conditioning system for conditioning a working space in a large building such as a factory.

Background Art

[0002] As an air conditioning system for large buildings, a displacement air conditioning method that forms a temperature stratification is known. In the displacement air conditioning method, the conditioned air from the air conditioner is supplied at a low speed from the side toward the working space of a person (generally about 2 to 3 m from the floor surface) to suppress mixing with the air in the upper part of the room.

[0003] Japanese Unexamined Patent Application Publication No. 2024-119783 (Patent Document 1) discloses an air supply structure in which conditioned air (for example, cold air) is blown downward from an air duct portion provided above the room, and the blowing speed of the inner portion of the air duct portion is made larger than the blowing speed of the outer portion. Thereby, when supplying conditioned air from above the room, while suppressing the entrainment of contaminants, by quickly descending, the lower part of the room is filled with low-temperature and clean air, and a layer of high-temperature and contaminant-containing air is formed in the upper part of the room.

[0004] Further, Japanese Unexamined Patent Application Publication No. 2012-184867 (Patent Document 2) discloses an air conditioning blowing unit in which a sock duct is attached to the lower end portion in a gallery chamber into which the lower end portion of a vertical duct is received. With this unit, the conditioned air from the vertical duct is blown out from the gallery of the gallery chamber through the sock duct, so that the blowing wind speed becomes uniform and the noise is reduced.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

[0006] In displacement air conditioning systems, conditioned air is generally supplied at a slow airflow rate to avoid disturbing the air in the upper part of the room. As a result, it takes time to transport air from the outlet to distant locations, and in buildings with large floor areas, temperature unevenness (uneven temperature distribution) is likely to occur on the surface. On the other hand, increasing the airflow rate necessitates larger outlets, leading to larger air supply components. Therefore, there has been a need for a technology that can transport air over long distances without increasing the size of the air supply components. Patent documents 1 and 2 do not address such technologies.

[0007] The present invention was made to solve the above-mentioned problems, and its objective is to provide an air conditioning system that can efficiently air-condition the workspace inside a large building without increasing the size of the air outlet component. [Means for solving the problem]

[0008] The air conditioning system according to the present invention is an air conditioning system that, in a certain context, air-conditions a workspace within a building, and comprises an air conditioner installed in the building and a discharge member connected to the air supply port of the air conditioner via a duct. The discharge member has an inlet into which conditioned air flows in, an outlet that blows the conditioned air that has flowed into the inlet toward the floor, and a plurality of discharge holes located between the inlet and the outlet that blow out a portion of the conditioned air that has flowed into the inlet in a horizontal direction.

[0009] Preferably, the air velocity of the conditioned air blown out from the outlet is greater than the air velocity of the conditioned air blown out from the outlet.

[0010] Preferably, the discharge member is formed by a cylindrical body extending vertically, having an inlet at its upper part, discharge holes on its side, and an outlet at its lower part.

[0011] Preferably, an induction member is provided between the duct and the discharge member to draw in air from the workspace and send it to the inlet.

[0012] Preferably, the opening ratio of the discharge holes of the discharge member is smaller closer to the induction member than further away. [Effects of the Invention]

[0013] According to the present invention, by blowing conditioned air from the outlet toward the floor, the conditioned air flows along the floor so as to adhere to the floor surface and is transported over long distances. Therefore, it is possible to efficiently air condition the workspace within a large building without increasing the size of the blowing member. [Brief explanation of the drawing]

[0014] [Figure 1] (A) is a schematic partial cross-sectional view showing the state in which the discharge member according to Embodiment 1 is arranged, and (B) is a schematic partial cross-sectional view showing the state in which an example of a conventional discharge member is arranged. [Figure 2] This is a schematic cross-sectional view showing the blowing member according to Embodiment 1. [Figure 3] (A) is a schematic plan view showing an example of the arrangement of air outlet components within a building, and (B) is a schematic plan view showing the air outlet component with a wind deflector attached. [Figure 4] This is a schematic cross-sectional view showing the discharge member and the induction member according to Embodiment 2. [Figure 5] This is a schematic cross-sectional view showing a modified example of Embodiment 2, specifically the discharge member and the induction member. [Modes for carrying out the invention]

[0015] Embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and their descriptions will not be repeated.

[0016] <Embodiment 1> Referring to FIGS. 1 to 3, Embodiment 1 will be described. FIG. 1(A) is a schematic diagram when the air conditioning system (replacement air conditioning method) according to this embodiment is applied in building 100. FIG. 1(B) is a schematic diagram when an example of a conventional air conditioning system (the same method) is applied in the same building 100. In FIG. 1 and the like, the direction indicated by reference sign X is referred to as the depth direction of building 100, the direction indicated by reference sign Y (FIG. 3) is referred to as the width (left - right) direction, and the height direction is indicated by reference sign Z.

[0017] (Regarding the building) Referring to FIG. 1(A), building 100 will be briefly described. Building 100 is, for example, a factory, and an indoor space S is partitioned by a ceiling 101, a floor surface 102, and left and right walls 103 (103a, 103b). Building 100 has, for example, a width and a depth of 100 to 200 m respectively, and a height from floor surface 102 to ceiling 101 of 10 to 20 m.

[0018] The indoor space S includes a work space S1 where workers perform various operations and an upper space S2 above the work space S1. The work space S1 refers to, for example, a space with a height from floor surface 102 to about 2 to 3 m. The upper space S2 is a space near the ceiling 101 and refers to, for example, a space with a height from floor surface 102 of about 2 to 3 m or more.

[0019] On one side of the wall 103a inside the building 100, an air conditioner 2 is installed. The air conditioner 2 is, for example, a ceiling-suspended package air conditioner with an indoor unit and an outdoor unit as a pair (hanging brackets, etc. are not shown). The air conditioner 2 is attached so as to supply conditioned air (cool air) α1 toward the other wall 103b, and one end (upper end) side of a duct 3 extending in the vertical direction (substantially vertical direction) is connected to the air supply port of the air conditioner 2. For example, one duct 3 is connected to one air conditioner. A blowing member 4 is connected to the other end (lower end) side of the duct 3. That is, the blowing member 4 is connected to the air supply port of the air conditioner 2 via the duct 3. The conditioned air α11, α12 blown out from the blowing member 4 flows in the depth direction, gradually rises, and is sucked in from the suction port below the air conditioner 2 as indicated by the arrow of the dashed two-point line. Thus, the indoor air circulates. Note that an opening (not shown) for taking in outside air may be provided in the wall 103a near the suction port of the air conditioner 2, and the air conditioner 2 may suck in outside air and indoor air to generate mixed air. Note that the air conditioner 2 is not limited to a ceiling-suspended type, and may be a wall-mounted type or a floor-standing type.

[0020] (Regarding the blowing member) Before describing the blowing member 4 of the present embodiment, for comparison, a conventional blowing member 400 shown in FIG. 1(B) will be described. The blowing member 400 is connected to the air conditioner 2 via the duct 3, similar to the blowing member 4 of the present embodiment. The blowing member 400 has, for example, a hollow box shape and is placed on the floor surface 102.

[0021] The blowing member 400 has an opening (not shown) communicating with the duct 3 at the upper end, and a large number of fine holes (not shown) are formed on the side surface. The conditioned air α1 flowing from the air conditioner 2 into the blowing member 400 via the duct 3 is blown out horizontally from the fine holes (reference sign α11). To prevent mixing with the air in the upper space S2, the blown air α11 is blown out at a low speed of, for example, 0.5 m / s. Since the blowing wind speed is slow, the conveying force to a distant place from the blowing member 400 is weak, and temperature unevenness occurs on the floor surface 102. On the other hand, increasing the size (opening area) of each fine hole to increase the air volume in order to reach a distant place leads to an increase in the size of the blowing member 400.

[0022] To overcome the above-mentioned drawbacks, the discharge member 4 of this embodiment is configured to blow conditioned air α1 downward toward the floor surface 102 (reference numeral α12), as shown in Figure 1(A), and to blow a portion of the conditioned air α1 horizontally from the side (reference numeral α11). The structure of the discharge member 4 will be described below.

[0023] Figure 2 is a schematic diagram showing a discharge member 4 connected to the downstream end of the duct 3. In this embodiment, the discharge member 4 is formed by a cylindrical body extending vertically. The upper end of the discharge member 4 is inserted into the duct 3, and its upper opening constitutes an inlet 40 into which conditioned air α1 from the duct 3 flows.

[0024] Multiple through holes are formed on the side surface of the discharge member 4, extending vertically and horizontally, and these through holes constitute multiple discharge holes 41. The opening at the lower end of the discharge member 4 constitutes the discharge outlet 42. Specifically, the diameter of the discharge outlet 42 is equal to the inner diameter of the discharge member 4.

[0025] The discharging member 4 is formed, for example, from perforated metal into a cylindrical shape, and its inner diameter D1 may be 300 to 600 mm. The discharging outlet 42 is positioned above the floor surface 102, and the distance L1 between the discharging outlet 42 and the floor surface 102 is, for example, 100 to 400 mm. The distance L2 from the floor surface 102 to the uppermost discharging hole 41 is, for example, 1000 to 1800 mm.

[0026] The flow of the conditioned air α1 is described below. The conditioned air α1 that flows into the inlet 40 via the duct 3 flows vertically through the discharge member 4 and is blown downward from the outlet 42 toward the floor surface 102 (symbol α12). As the conditioned air α1 flows from the inlet 40 to the outlet 42, a portion of it is blown horizontally from the discharge hole 41 (symbol α11).

[0027] Since the air α12 discharged from the outlet 42 is blown toward the floor surface 102, even if the wind speed is high, there is little risk of entraining the upper air of the work space S1. Therefore, the wind speed of the discharged air α12 can be made higher than the wind speed of the discharged air α11 discharged from the outlet 41. For example, the air volume of the air conditioner 2 and the distance L1 between the outlet 42 and the floor surface 102 are set so that the wind speed of the discharged air α12 flowing across the floor surface 102 is in the range of 2 to 4 m / s. In this embodiment, for example, it is set to 3 m / s.

[0028] The high-velocity discharged air α12 blown downward from the outlet 42 collides with the floor surface 102 and then flows along the floor surface 102 to a distant location, adhering to the floor surface 102 (a floor surface adhesion flow is formed). Because the discharged air α12 flows along the floor surface 102, it does not disturb the air in the upper space S2, and because it flows to a distant location, temperature unevenness on the floor surface 102 can be eliminated.

[0029] Furthermore, the outlet 42 is the lower end opening of the cylinder forming the discharging member 4, and can blow out a sufficient volume of discharged air α12. Therefore, the discharging member 4 can be made smaller. Consequently, the degree of freedom in arranging the discharging member 4 within the building 100 is increased. Moreover, the number of discharging members 4 to be installed can be reduced, thereby lowering equipment installation costs.

[0030] On the other hand, the discharged air α11 needs to have a low airflow velocity in order to avoid entraining the air in the upper space S2. For example, the airflow rate of the air conditioner 2 and the opening area of ​​the discharge port 41 are set so that the discharge velocity is in the range of 0.1 to 2.0 m / s. In this embodiment, for example, it is set to have a discharge velocity of 0.5 m / s.

[0031] The discharged air α11, which is blown horizontally from the discharge hole 41, has a low wind speed and therefore does not disturb the air in the space above S2. Furthermore, after being blown horizontally, the discharged air α11 gradually descends, as shown in Figure 1(A), and merges with the discharged air (floor-adhering flow) α12 flowing along the floor surface 102. It is then carried by the discharged air α12 to distant locations. Therefore, a sufficient amount of cold air can be delivered to distant locations.

[0032] Figure 3 is a schematic plan view showing an example of the arrangement of the air outlet members 4. In this example, multiple air outlet members 4 are arranged in the center of the building 100 and near the walls 103 in order to cool the workspace S1. The air outlet member 4 located in the center is configured to blow out air α11 and α12 in all directions.

[0033] On the other hand, the discharge member 4 positioned near the wall 103 may be configured so that the discharged air α11 and α12 are blown out in directions other than towards the wall 103. That is, the discharge hole 41 may be formed only on a part of the discharge member 4 in the circumferential direction. In addition, a partition plate (not shown) may be provided between the lower end of the discharge member 4 on the wall side and the floor surface 102 so that the discharged air α12 blown out from the outlet 42 does not go towards the wall 103.

[0034] Figure 3(B) is a plan view showing the state in which the discharge member 4 is positioned between the wall 103 and the passage 102a that extends parallel to the wall 103. Note that the discharge member 4 is not limited to a cylindrical shape, but may also be rectangular in shape as shown in this figure.

[0035] An obstacle (machinery, etc.) 7 is placed across the passage 102a from the discharge member 4. In this case, the airflow adhering to the floor surface collides with the obstacle 7, causing turbulence in the airflow. Therefore, for example, a wind deflector 5 may be provided at the lower end of the discharge member 4 on the side facing the obstacle 7. The wind deflector 5 guides the discharged air α12, which tends to flow towards the front side (obstacle 7 side), in the left-right direction along the passage 102a. The wind deflector 5 allows the discharged air α12 to be transported to a distant location along the passage 102a.

[0036] As described above, according to the discharge member 4 of this embodiment, the low-speed discharged air α11 from the discharge hole 41 does not disturb the air in the upper space S2 (while maintaining temperature stratification), and the floor surface adhesion flow of the discharged air α12 discharged from the outlet 42 eliminates temperature unevenness on the floor surface 102. Furthermore, since the airflow from the outlet 42 can be increased, the discharge member 4 can be made smaller.

[0037] <Embodiment 2> Embodiment 2 will be described with reference to Figure 4. In this embodiment, an induction member 6 is provided between the duct 3 and the discharge member 4A.

[0038] The induction member 6 is formed, for example, by a cylindrical body portion 60 with a smaller diameter than the discharge member 4A, and includes an upper opening 61 and a lower opening 62. The lower end of the induction member 6 is connected to the upper end of the discharge member 4A, and the lower opening 62 is in communication with the receiving inlet 40A of the discharge member 4A. The upper end portion that constitutes the upper opening 61 is inserted inside the downstream end of the duct 3. In this way, the conditioned air α1 flowing from the duct 3 flows to the discharge member 4A via the induction member 6.

[0039] The main body 60 is provided with an induction opening 63 for inducing air β1 from the working space S1 (air around the induction member 6). In this embodiment, the induction means is configured by attaching a louver 6a to the induction opening 63. The vanes of the louver 6a are inclined upward to facilitate the flow of air β1.

[0040] The discharge member 4A is formed similarly to the discharge member 4 of Embodiment 1, and its inner diameter dimension D11 may be 300 to 600 mm. The air outlet 42A is positioned above the floor surface 102, and the distance L1 between the air outlet 42A and the floor surface 102 is, for example, 100 to 400 mm. The height dimension L21 from the floor surface 102 to the upper end of the discharge member 4A is, for example, 1000 to 1800 mm.

[0041] The inner diameter D11 of the blowing member 4A is, for example, 10% or more larger than the inner diameter D3 of the duct 3 and larger than the inner diameter D2 of the attracting member 6. Further, the inner diameter D3 of the duct 3 is the same as or larger than the inner diameter D2 of the attracting member 6. That is, the relationship of D2≦D3<D11 is satisfied. Therefore, the speed of the air-conditioning air α1 flowing through the attracting member 6 is larger than the speed flowing through the blowing member 4A. As a result, the inside of the attracting member 6 becomes a lower pressure (negative pressure) than the outer periphery of the attracting member 6, and the air β1 flows into the attracting member 6 through the gap 6a. The inflowing air β1 merges with the air α1 flowing from the duct 3.

[0042] Thus, since the air α1 and β1 flow into the inlet 40A of the blowing member 4A, the air volume flowing through the blowing member 4A increases. Note that it is sufficient that the inner diameter D2 of the attracting member 6 is smaller than the inner diameter D11 of the blowing member 4A, and the inner diameter D2 of the attracting member 6 may be larger than the inner diameter D3 of the duct 3.

[0043] Similar to the first embodiment, the air volume of the air conditioner 2 and the separation distance between the air outlet 42A and the floor surface 102 are set so that the wind speed of the blowing air α12 flowing through the floor surface 102 is 2 to 4 m / s or less. On the other hand, in order not to entrain the air in the upper space S2, the air volume of the air conditioner 2 and the opening area of the air outlet hole 41A are set so that the blowing speed is in the range of 0.1 to 2 m / s.

[0044] Regarding the opening ratio of the air outlet hole 41A, the side closer to the attracting member 6 (the upper side of the blowing member 4A) may be made smaller than the side farther away (the lower side of the blowing member 4A). By doing so, at the boundary between the lower end portion of the attracting member 6 and the upper end portion of the blowing member 4A, the negative pressure is less likely to decrease, and the force for attracting the air β1 in the lower portion of the gap 6a (the gap 6a on the blowing member 4A side) becomes larger. Further, since the blowing amount of the blowing air α11 closer to the attracting member 6 decreases, the possibility that the blowing air α11 is immediately sucked from the gap 6a becomes less.

[0045] According to this embodiment, since air β1 is drawn in by the induction member 6, the amount of air blown out from the outlet 42A of the discharge member 4A increases. Therefore, even if the induction member 6 and the discharge member 4A are made smaller, a large amount of air can be flowed.

[0046] Air β1 is room temperature air in the workspace S1, which is not directly exposed to the blown airs α11 and α12, and is warmer than the blown airs α11 and α12. Therefore, when air β1 is taken in, the temperature of the air flowing through the blown member 4A rises. Consequently, even if a large amount of blown air α12 is blown from the outlet 42A toward the floor surface 102, the temperature of the floor surface 102 does not drop easily, and the occurrence of condensation on the floor surface 102 can be suppressed.

[0047] Furthermore, if the discharge member 4A is made of a metal material such as a steel plate, supercooling due to the cold air flowing through the discharge member 4A can be prevented, thus preventing condensation from occurring on the outer surface of the discharge member 4A. In addition, since the discharged air α11 and α12 are not excessively cooled, discomfort is less likely to occur even if the discharged air α11 and α12 directly hits a worker near the discharge member 4A.

[0048] <Variation> A modified example of Embodiment 2 will be described with reference to Figure 5. In this modified example, a plurality of thin tubes 6b are attached to the attraction member 6 instead of the louvers 6a. The thin tubes 6b may be circular or rectangular. The thin tubes 6b will be described mainly below, and the other configurations are the same as in Embodiment 2, so their description will not be repeated.

[0049] The thin tube 6b is attached to the side of the attracting member 6 and is integrally formed with an inclined portion 6b1 that extends diagonally upward and a vertical portion 6b2 that is connected to the inclined portion 6b1 and extends upward. The attracting opening 63 formed in the main body portion 60 of the attracting member 6 is in communication with the flow path of the thin tube 6b, and the air β1 taken in from the vertical portion 6b2 flows into the attracting member 6 via the inclined portion 6b1.

[0050] Because the thin tube 6b is bent and extends upward, it can take in air β1 from the upper part of the working space S1 without taking up a large amount of space. In addition, it reliably prevents the blown air α11 blown out from the blowing hole 41A at the top of the blowing member 4A from being sucked into the thin tube 6b. The shape and number of thin tubes 6b can be appropriately determined depending on the size of the blowing member 4.

[0051] Although embodiments of this invention have been described above with reference to the drawings, this invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiments within the same scope as this invention, or within the equivalent scope.

[0052] For example, the number of air outlets 42 is not limited to one. Multiple air outlets 42 may be provided by closing the opening at the lower end of the air outlet member 4 to form a bottom surface and creating multiple openings in this bottom surface. Also, as an induction means for the induction member 6, louvers 6a and thin tubes 6b may not be provided, and only induction openings 63 may be provided on the side of the main body 60. Furthermore, although the air conditioning system has been described in the context of cooling, it may also be applied to heating. [Explanation of Symbols]

[0053] 100 Building, 2 Air conditioner, 3 Duct, 4 Discharge component, 40 Inlet, 41 Discharge hole, 42 Discharge outlet, 5 Wind deflector, 6 Induction component, 60 Main body, 61 Upper opening, 62 Lower opening, 63 Induction opening

Claims

1. An air conditioning system for providing air conditioning for workspaces within a building, The building comprises an air conditioner installed inside the building and a discharge member connected to the air intake of the air conditioner via a duct, The aforementioned air supply member has an inlet into which conditioned air flows in, an outlet that blows the conditioned air that has flowed into the inlet toward the floor, and a plurality of outlets located between the inlet and the outlet that blow out a portion of the conditioned air that has flowed into the inlet in a horizontal direction, wherein this is an air conditioning system for a building.

2. The building air conditioning system according to claim 1, wherein the wind velocity of the conditioned air blown out from the outlet is greater than the wind velocity of the conditioned air blown out from the outlet.

3. The air conditioning system for a building according to claim 1 or 2, wherein the discharge member is formed by a cylindrical body extending vertically, has an inlet at its upper part, a discharge hole on its side, and a discharge outlet at its lower part.

4. The building air conditioning system according to claim 3, wherein an induction member is provided between the duct and the discharge member for drawing in air from the workspace and sending it to the inlet.

5. The building air conditioning system according to claim 4, wherein the opening ratio of the outlet holes of the outlet member is smaller closer to the induction member than further away.

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