Air conditioning system

Abstract

To suppress apparatus cost and construction cost of an air conditioner when air-conditioning a space that is divided into a plurality of areas.SOLUTION: An air conditioning system 100 includes: an air conditioner 10; a first duct system 20 for supplying air-conditioned air from the air conditioner to a first area A; and a second duct system 30 for supplying air including the air-conditioned air from the air conditioner to a second area B. The first duct system includes: a plurality of first blowout ports 25 for blowing out the air-conditioned air into the first area; and a branch air supply port 22 for the air-conditioned air provided upstream of the first blowout ports. The second duct system includes: an air suction port 32 disposed leaving a predetermined clearance with respect to the branch air supply port to suck mixed air formed by mixing the air-conditioned air from the branch air supply port with indoor air; a plurality of second blowout ports 36 for blowing out the mixed air into the second area; and a booster fan 33 that blows out the mixed air taken in from the air suction port to the second blowout ports.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an air conditioning system, and more particularly to a system for efficiently air-conditioning an indoor space, for example, where an office area and a production area are co-located, while keeping costs down. [Background technology]

[0002] Conventionally, there has been known an air conditioning system in which multiple air conditioners are installed, each air conditioner has an air supply duct leading to multiple air conditioned areas, and conditioned air from the air conditioners is supplied individually to each air conditioned area (Patent Document 1, etc.).

[0003] For example, in a factory, an air-conditioned space may be divided into an office area where workers use PCs and other devices to perform office work, and a production area where heat-generating equipment with electric motors or internal combustion engines is installed and workers mainly use such equipment to perform production activities. In such a case, an air-conditioning system such as that described in Patent Document 1 makes it easy to individually control the air conditioning for each area, for example, in the summer, by installing more air conditioners to provide conditioned air in the production area than in the office area, and cooling the production area with a relatively low set temperature. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2008-241163 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, conventional systems require the installation of at least one air conditioner in each office area and production area, which poses the problem of high equipment and installation costs for the air conditioners.

[0006] In addition, in a conventional system in which the required number of air conditioners are provided for each air-conditioning area, it is necessary to provide air conditioners for each area based on the maximum heat load. For example, if a heat-generating device is installed in a production area, it is assumed that the indoor temperature of the production area will be higher than that of the office area, and the maximum heat load of the production area will be higher than that of the office area, so it is necessary to install more air conditioners supplying conditioned air to the production area than to the office area. However, when the air-conditioned space in a factory is divided into an office area and a production area, it is assumed that office workers are always present in the office area during their working period, and workers are only present in the production area for a limited time. In this case, it is necessary to constantly supply conditioned air to the office area, but it is sufficient to supply conditioned air to the production area only for the period before and after the workers work. However, as mentioned above, when determining the number of air conditioners based on the maximum heat load of each area, it is necessary to have more air conditioners than the office area, even though there is no need to constantly supply conditioned air to the production area, which makes the operation of the air conditioners inefficient.

[0007] Therefore, an object of the present invention is to reduce the equipment cost and construction cost of an air conditioner when air conditioning a space divided into multiple areas. Another object of the present invention is to more efficiently air-condition an air-conditioned space divided into multiple areas. [Means for solving the problem]

[0008] The inventors of the present invention have earnestly studied means for solving the problems of the above-mentioned conventional inventions, and have discovered that by configuring the first duct system in the first area and the second duct system in the second area to supply conditioned air from the same air conditioner, providing a specified clearance between the branch air supply port of the first duct system and the air intake port of the second duct system, and supplying a mixture of conditioned air from the air conditioner and the room air in the first area to the second duct system, it is possible to efficiently perform air conditioning appropriate for each area while keeping down the equipment costs and construction costs of the air conditioners. Specifically, the present invention has the following configuration.

[0009] The present invention relates to an air conditioning system 100. The air conditioning system 100 according to the present invention includes an air conditioner 10, a first duct system 20, and a second duct system 30. The air conditioner 10 generates conditioned air in which one or more of temperature, humidity, air purification, and airflow have been adjusted. The first duct system 20 supplies the conditioned air from the air conditioner 10 to a first area A. The second duct system 30 supplies air containing the conditioned air from the air conditioner 10 to a second area B. It is preferable that the first area A and the second area B are adjacent areas, but another area may exist between these areas. It is also preferable that the first area A and the second area B are at least partially connected to each other so that air can escape. However, a partition wall may be provided between these areas. As will be described later, the second duct system 30 supplies air obtained by mixing the conditioned air from the air conditioner 10 and room air to the second area B.

[0010] Here, the first duct system 20 has a branch air supply port 22 and a plurality of first air outlets 25. The first air outlet 25 is an air outlet for blowing out the conditioned air from the air conditioner 10 into the first area A. The branch air supply port 22 is provided upstream of the first duct system 20 from the first air outlet 25, and branches the conditioned air from the air conditioner 10 toward the second duct system 30. The second duct system 30 has an air intake port 32, a booster fan 33, and a plurality of second air outlets 36. The air intake port 32 is disposed with a predetermined clearance between it and the branch air supply port 22 of the first duct system 20, and takes in a mixed air obtained by mixing the conditioned air from the branch air supply port 22 and the room air. The room air referred to here is preferably the room air in the first area A, but is not limited thereto, and may be the room air in the second area B or the room air in another area. The second air outlet 36 is an air outlet for blowing out this mixed air into the second area B. The booster fan 33 is configured to send out the mixed air taken into the second duct system 30 from the air intake 32 to the second air outlet 36.

[0011] As in the above configuration, the conditioned air from the air conditioner 10 is supplied to the first duct system 20, and the first duct system 20 is branched to supply the conditioned air to the second duct system 30, so that one air conditioner 10 can be shared between the first area A and the second area B. This makes it possible to reduce the equipment cost and construction cost of the air conditioner 10. In addition, by providing a clearance between the first duct system 20 and the second duct system 30, the conditioned air (cold air / hot air) from the air conditioner 10 and the indoor air in the first area A can be mixed and supplied to the second area B via the second duct system 30, making it easier to adjust the temperature of the mixed air supplied to the second area B to an appropriate temperature. This eliminates the need to install an air conditioner 10 separately for the second area B. It is preferable that the air conditioning system 100 according to the present invention is equipped only with an air conditioner 10 that supplies conditioned air to both the first area A (first duct system 20) and the second area B (second duct system 30). However, this is not limited to the above, and in addition to such a shared air conditioner 10, it is also possible to provide, for example, another air conditioner that supplies conditioned air to the first area A and the second area B individually.

[0012] In the air conditioning system 100 according to the present invention, the clearance between the branch air supply port 22 of the first duct system 20 and the air intake port 32 of the second duct system 30 is preferably 250 to 2000 mm. If the clearance is less than 250 mm, the conditioned air and the room air are not easily mixed in the second duct system 30, and there is a concern that the pressure field of the first duct 20 of the PAC system may be affected by turning on / off the booster fan 33 or changing the opening degree of the air volume control damper 37. On the other hand, if the clearance exceeds 2000 mm, the conditioned air is less likely to reach the second duct system 30. For this reason, it is appropriate to set the clearance distance to 250 to 2000 mm as described above.

[0013] In the air conditioning system 100 according to the present invention, the first duct system 20 is preferably configured to perform area air conditioning by supplying conditioned air to the entire first area A. The second duct system 30 is preferably configured to perform spot air conditioning by supplying mixed air to a local area of ​​the second area B. Area air conditioning is an air conditioning method that supplies conditioned air with the aim of making the entire area have uniform air conditioning conditions (temperature, humidity). Spot air conditioning is an air conditioning method that aims to supply conditioned air to a local spot within the area and does not basically involve the air conditioning conditions of the entire area. The first area A can be directly supplied with conditioned air from the air conditioner 10 via the first duct system 20 to perform area air conditioning, so it is suitable for use as an area where workers are stationed, for example. On the other hand, the second area B can be supplied with a mixture of conditioned air and room air via the first duct system 20 and the second duct system 30 to perform spot air conditioning, so it can be said that it is suitable for use as an area where the location and time of workers are limited, for example. In this way, by separating areas into those that use area conditioning and those that use spot conditioning, it is possible to efficiently achieve air conditioning that is suited to the intended use of the area.

[0014] In the air conditioning system 100 according to the present invention, the first duct system 20 preferably has a loop duct 24 configured to form a closed loop disposed in the first area A. In this manner, air conditioning using the loop duct 24 is suitable for area air conditioning. Note that the closed loop is not limited to a simple O-shaped loop, and various loop shapes such as a figure-of-eight loop and a double loop can be mentioned.

[0015] In the air conditioning system 100 according to the present invention, the booster fan 33 is preferably configured to be able to be switched on and off while the air conditioner 10 is in operation. By individually turning the booster fans 33 on and off in this manner, it is possible to individually control whether or not air conditioning is performed in the second area B.

[0016] In the air conditioning system 100 according to the present invention, the second duct system 30 preferably further includes a damper 37 for adjusting the volume of the mixed air circulating within the second duct system 30. By providing the damper 37 in the second duct system 30 in this manner, the volume of the mixed air supplied to the second area B can be individually adjusted.

[0017] In the air conditioning system 100 according to the present invention, it is preferable that the intake port 32 and the booster fan 33 of the second duct system 30 are provided in the first area A, and at least one of the second air outlets 36 is provided in the second area B. Since the booster fan 33 generates heat during operation, it is preferable to place it in the first area A where the indoor temperature is lower than that of the second area B.

[0018] In one embodiment of the air conditioning system 100 according to the present invention, the first area A may be an office area, and the second area B may be a production area in which a heat generating device C is installed and communicates with the office area. An exhaust port 40 may be provided at the communication portion between the first area A and the second area B. The first duct system 20 may have a loop duct 24 configured to form a closed loop arranged in the first area A. In this case, it is preferable that the duct 24(a) on the communication portion side of the loop duct 24 of the first duct system 20 is arranged closer to the first area A than the exhaust port 40, and the duct 24(b) on the opposite side to the communication portion is arranged along the wall of the first area A. By arranging them in this manner, the first area A can be more efficiently air conditioned. In particular, by providing the exhaust port 40 in, for example, the ceiling portion of the communication portion (boundary) between the first area A and the second area B, the air in the first area A and the air in the second area B are mixed through the communication portion, and the mixing loss of air conditioning energy can be suppressed.

[0019] In one embodiment of the air conditioning system 100 according to the present invention, among the loop ducts 24 of the first duct system 20, the duct 24(a) on the communication part side may have a narrower spacing between the multiple first air outlets 25 than the duct 24(b) on the opposite side to the communication part. By narrowing the spacing between the first air outlets 25 in the duct 24(a) on the communication part side in this manner, the conditioned air can be efficiently supplied to an area where the conditioned air is likely to escape to the second area B. Effect of the Invention

[0020] According to the present invention, when conditioning a space divided into a plurality of areas, the equipment cost and the construction cost of the air conditioner can be reduced. Also, according to the present invention, the air-conditioned space divided into a plurality of areas can be more efficiently conditioned. [Brief description of the drawings]

[0021] [Figure 1] FIG. 1 is a plan view showing an air conditioning system according to one embodiment of the present invention. [Diagram 2] FIG. 2 is a perspective view showing a schematic diagram of an air conditioning system according to an embodiment of the present invention, and particularly shows a loop duct in a first area. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] Hereinafter, the embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below, and includes appropriate modifications of the embodiments described below within the scope obvious to those skilled in the art.

[0023] FIG. 1 shows an air conditioning system 100 according to an embodiment of the present invention. As shown in FIG. 1, the space to be conditioned by the air conditioning system 100 is divided into a first area A and a second area B. The first area A and the second area B are not completely separated by a partition wall or the like, and are at least partially connected to each other. Although not shown, a vertical wall may be formed from the ceiling to the passageway in the communication part between the first area A and the second area B. In FIG. 1, the communication part (boundary line) between the first area A and the second area B is shown by a dashed line. It is preferable that the communication part between the first area A and the second area B has a passageway large enough for at least a person to pass through, and for example, this passageway may be 120 cm wide or more and 180 cm high or more. It is preferable that a pillar, a partition, an openable door, a shutter, or the above-mentioned vertical wall is provided at the boundary between the first area A and the second area B, so that it is clear that they are different areas.

[0024] In this embodiment, it is assumed that the first area A of the air-conditioned space is used as an office area, and the second area B is used as a production area. In the first area A, for example, desks, chairs, fixtures, PCs, etc. are placed, and workers are stationed in the first area A to perform various office work. For this reason, it is preferable that the first area A is generally air-conditioned at all times. On the other hand, in the second area B, heat-generating equipment C driven by an electric motor or an internal combustion engine is installed, and workers move from the first area A to the second area B as necessary and operate the heat-generating equipment C to perform various production work. For this reason, it is preferable that the second area B is air-conditioned at the necessary time and in the necessary places. There is no particular restriction on the type of heat-generating equipment C installed in the second area B. In this embodiment, it is assumed that glass bottles and cases are washed with steam in the second area B. For this reason, heat-generating equipment C such as an automatic bottle washer and case washer is placed in the second area B.

[0025] As shown in Fig. 1, the air conditioning system 100 mainly comprises an air conditioner 10, a first duct system 20, and a second duct system 30. An outdoor unit of the air conditioner 10 is installed outside the air-conditioned space, for example, outdoors. A publicly known air conditioner can be adopted as the air conditioner 10. The air conditioner 10 has a function of exchanging heat between the inside and outside of the air-conditioned space and supplying conditioned air, mainly cold air or warm air, to the space. Specifically, the air conditioner 10 may be a commercial packaged air conditioner that includes an indoor unit and an outdoor unit as a set.

[0026] The conditioned air generated by the air conditioner 10 is first supplied to a first duct system 20 and introduced into the air-conditioned space (room) by this first duct system 20. The first duct system 20 mainly includes an introduction duct 21 and a loop duct 24. The introduction duct 21 connects the air conditioner 10 and the loop duct 24, and introduces the conditioned air generated by the air conditioner 10 into the loop duct 24. A part of the introduction duct 21 is located outdoors like the air conditioner 10, and the other part is located indoors like the loop duct 24. For this reason, the introduction duct 21 penetrates the wall surface of the air-conditioned space.

[0027] The loop duct 24 is a duct configured to supply conditioned air to the entire first area A. FIG. 2 shows a perspective view of the loop duct 24. As shown in FIGS. 1 and 2, the loop duct 24 has first air outlets 25 that open downward and are formed at multiple locations with intervals, and conditioned air is blown out from the first air outlets 25 toward the first area A. The loop duct 24 is branched into two, left and right, from the joint with the introduction duct 21, and has a closed loop structure configured such that one of the branches finally reaches the other branch. Specifically, the loop duct 24 is divided into a duct 24(a) on the side of the communication part between the first area A and the second area B and a duct 24(b) on the wall side opposite to the communication part, with the joint with the introduction duct 21 as the boundary. Therefore, the conditioned air introduced from the introduction duct 21 to the loop duct 24 branches into either the duct 24(a) on the communication side or the duct 24(b) on the wall side at the joint between the introduction duct 21 and the loop duct 24, and is blown out from the first blowing outlet 25 provided in each duct 24(a, b). In addition, since the duct 24(a) on the communication side and the duct 24(b) on the wall side eventually merge, the conditioned air passing through the duct 24(a) on the communication side and the conditioned air passing through the duct 24(b) on the wall side also eventually merge. As a result, almost the entire amount of the conditioned air introduced into the loop duct 24 is blown out from inside the loop duct 24, and does not basically return to the joint with the introduction duct 21. Furthermore, by introducing conditioned air into the loop duct 24, the conditioned air can be efficiently delivered to the farthest part 24(c) of the loop duct 24, which is the furthest from the joint with the inlet duct 21. Therefore, by providing the loop duct 24 throughout the first area A, the entire first area A can be almost uniformly conditioned.

[0028] In addition, in FIG. 2, the height level at which the loop duct 24 is arranged is indicated by the symbol H. The height level H of the loop duct 24 is preferably in the range of 2.5 to 6 m from the floor surface, and may be 3 to 5 m or 3 to 4 m from the floor surface. The intervals of the first air outlets 25 formed in the loop duct 24 can be appropriately set according to the total length of the loop duct 24 and other conditions, and may be selected from the range of 500 to 1500 mm, for example. As shown in FIG. 1 and FIG. 2, the first air outlets 25 are formed at multiple locations in the duct 24(a) on the communication part side and the duct 24(b) on the wall side of the loop duct 24. The intervals at which the first air outlets 25 are formed may be different between the duct 24(a) on the communication part side and the duct 24(b) on the wall side. For example, the interval between the first air outlets 25 in the duct 24(a) on the communication side may be set narrower than the interval between the first air outlets 25 in the duct 24(b) on the wall side. For example, when the average value of the interval between the first air outlets 25 in the duct 24(a) on the communication side is set to 100%, the average value of the interval between the first air outlets 25 in the duct 24(b) on the wall side may be set to 30 to 95% or 50 to 90%.

[0029] 1 and the like, the loop duct 24 may have an area where the first air outlet 25 is not formed. In this embodiment, the first air outlet 25 is not formed in the area of ​​the wall-side duct 24(b) of the loop duct 24 near the joint between the introduction duct 21 and the loop duct 24. For example, even in the first area A (office area), it is preferable to provide an area where the first air outlet 25 is not formed in such a manner in an area where it is assumed that no workers are constantly present in relation to the layout of the room and the arrangement of fixtures.

[0030] As shown in FIG. 1 and FIG. 2, the first duct system 20 has a branch air supply port 22 formed upstream of the first air outlet 25, which blows out conditioned air. Specifically, in this embodiment, the branch air supply port 22 is formed in a portion of the introduction duct 21 located upstream of the loop duct 24, in the first area A. Therefore, the branch air supply port 22 branches a portion of the conditioned air flowing through the introduction duct 21 and blows it out into the first area A. As described later, the branch air supply port 22 is provided for the purpose of supplying a portion of the conditioned air flowing through the introduction duct 21 to the second duct system 30. Therefore, it is preferable that the opening of the branch air supply port 22 faces the intake port 32 of the second duct system 30. Specifically, it is preferable that the opening of the branch air supply port 22 is formed in a horizontal direction (parallel to the floor surface) toward the second area B.

[0031] In addition, an air volume adjustment damper 23 may be attached to the branch air intake port 22. The air volume adjustment damper 23 serves to adjust the volume of conditioned air blown out from the inlet duct 21 to the first area A. A known air volume adjustment damper 23 may be used, and is configured to adjust the volume of air flow by moving the blades with a manual handle, for example. The air volume adjustment damper 23 may be completely closed, in which case almost the entire volume of conditioned air generated by the air conditioner 10 is supplied to the loop duct 24 via the inlet duct 21.

[0032] 1 and 2, an intake port 32 of an introduction duct 31 of a second duct system 30 is provided at the outlet of the branch air supply port 22 of the first duct system 20. Therefore, after the conditioned air generated by the air conditioner 10 is supplied to the first duct system 20, a part of it is blown out from the branch air supply port 22 and taken in by the second duct system 30. It is preferable that the opening of the branch air supply port 22 and the opening of the intake port 32 face each other so that the conditioned air blown out from the branch air supply port 22 of the first duct system 20 is efficiently taken in by the intake port 32 of the second duct system 30.

[0033] The second duct system 30 is arranged for the purpose of supplying air drawn in the first area A to the second area B. The second duct system 30 mainly includes an inlet duct 31 and a plurality of branch ducts 34, 35. The inlet duct 31 of the second duct system 30 has an air intake port 32 arranged in the first area A, extends from the first area A to the second area B, and The second duct system 30 is connected to a plurality of branch ducts 34, 35. The air taken in from the inlet duct 31 of the second duct system 30 is introduced into the plurality of branch ducts 34, 35 and blown out into the second area B through the second outlets 36 provided in each of the branch ducts 34, 35. For this reason, at least a portion of the inlet duct 31 of the second duct system 30 is located in the first area A, and at least a portion of each of the branch ducts 34, 35 where the second outlets 36 are provided is located in the second area B.

[0034] More specifically, the introduction duct 31 of the second duct system 30 includes an intake port 32 and a booster fan 33. The intake port 32 of the second duct system 30 is disposed at a position with a predetermined clearance from the branch air supply port 22 of the first duct system 20. That is, the intake port 32 of the second duct system 30 and the branch air supply port 22 of the first duct system 20 are not directly connected, and a space exists between them. Therefore, the entire amount of the conditioned air blown out from the branch air supply port 22 of the first duct system 20 is not immediately sucked in by the intake port 32 of the second duct system 30, but the conditioned air is blown out once into the first area A and then mixed with the indoor air in the first area A. Then, the mixed air, which is a mixture of the conditioned air blown out from the branch air supply port 22 and the indoor air in the first area A, is sucked in through the intake port 32 of the second duct system 30 and guided into the second duct system 30. For example, during cooling, the indoor air in the first area A is at a higher temperature than the conditioned air in the first duct system 20, so the mixed air of the indoor air and the conditioned air is naturally at a higher temperature than the conditioned air in the first duct system 20. The booster fan 33 provided in the introduction duct 31 of the second duct system 30 is arranged so as to blow air in the opposite direction to the intake port 32. Therefore, when the booster fan 33 is started, intake from the intake port 32 is started, and the mixed air sucked in from the intake port 32 is sent to the multiple branch ducts 34, 35 via the introduction duct 31.

[0035] The clearance between the branch air supply port 22 of the first duct system 20 and the air intake port 32 of the second duct system 30 is preferably 250 mm or more, and more preferably 300 mm or more, 400 mm or more, or 500 mm or more. If the clearance is too small, the conditioned air and the room air are difficult to mix, so it is preferable to avoid making the clearance less than 250 mm. In addition, this clearance is preferably 2000 mm or less, and more preferably 1800 mm or less, 1500 mm or less, or 1000 mm or less. If the clearance is too large, the conditioned air will not reach the air intake port 32 of the second duct system 30, so it is preferable to avoid making this clearance larger than 2000 mm. The appropriate range of the clearance is 500 to 1000 mm.

[0036] The significance of providing such a clearance is that, when a space in which a first area A (office area) and a second area B (production area) are arranged is conditioned by one air conditioner 10, appropriate conditioned air is supplied to each area. That is, during the summer season when cooling is particularly necessary, relatively low-temperature cooled air is supplied to the first area A (office area), while relatively high-temperature cooled air is supplied to the second area B (production area), so that an appropriate temperature difference is provided between the temperatures of the cooled air supplied to the first area A and the second area B. That is, since it is assumed that workers are stationed in the first area A, the temperature of the entire area is set to a level that the workers feel comfortable by appropriately supplying low-temperature cooled air to the first area A. On the other hand, the indoor temperature of the second area B is always higher than that of the first area A because the heat-generating device C is installed there. Considering such a temperature difference between the indoor temperatures of the second area B and the first area A, even if the cooling air supplied to the second area B is at a higher temperature than the first area A, it can provide a sufficient air conditioning effect to the workers in the second area B. In other words, if the same level of cooling air as that supplied to the first area A is supplied to the second area B, it will provide an excessive air conditioning effect, which is thought to result in energy loss. Therefore, by deliberately supplying a large amount of cooling air at a higher temperature to the second area B than to the first area A, it is possible to reliably deliver cooling air to the workers while suppressing this energy loss. As a result, even with only one air conditioner 10, it is possible to provide an appropriate air conditioning effect to the workers in both the first area A and the second area B.

[0037] In addition, for example, the amount of exhaust air from the branch air intake port 22 of the first duct system 20 Ve It is preferable to appropriately control the ratio of the amount of intake air Vi through the intake port 32 of the second duct system 30 to the amount of exhaust air through the branch air intake port 22. Ve is,The amount of intake air Vi of the intake port 32 can be controlled by adjusting the air volume of the air conditioner 10, and the amount of intake air Vi of the intake port 32 can be controlled by adjusting the air volume of the booster fan 33. For example, when the amount of intake air Vi is 1, the ratio of the amount of intake air Vi is preferably in the range of 1.5 to 6, and more preferably in the range of 2 to 4. As an example, the amount of exhaust air from the branch air intake port 22 is Ve 500m 3 / h (temperature 14°C), the intake volume Vi of the intake port 32 is 1000 to 2000 m 3 / h (temperature 26°C). Keep Ve fixed and adjust Booster Fan 33 Exhaust volume of branch air intake port 22 Ve may be within the above ratio range.

[0038] Also, for example, the temperature and air volume of the air conditioner 10 and the air volume of the booster fan 33 may be controlled so that the cooling temperature difference (difference between the indoor temperature and the supply air temperature) between the first area A and the second area B is approximately uniform. As an example, consider a case where the cooling temperature difference ΔT between each area is set to 12°C. For example, if the indoor temperature before the start of cooling in the first area A is 32°C, the temperature and air volume of the air conditioner 10 are adjusted to set the supply air temperature to the first area A to 20°C, thereby reducing the cooling temperature difference ΔT in the first area A. A In addition, if the indoor temperature before the start of cooling in the second area B is 38°C, the supply air temperature to the first area A is adjusted to 26°C by adjusting the air volume of the air conditioner 10 and the booster fan 33, and the cooling temperature difference ΔT B In this way, even if there is a difference in the temperature of the cooling air supplied to the first area A and the second area B, the cooling temperature difference ΔT A and the cooling temperature difference ΔT in the second area B B If the cooling temperature difference ΔT in each area is equal to or greater than a certain value and is approximately uniform, the workers in each area can enjoy a uniform air conditioning effect in each area. A ,ΔT B is preferably 8° C. or more, more preferably 10° C. or more, or 12° C. or more. In addition, the cooling temperature difference ΔT A and the cooling temperature difference ΔT in the second area B BIt is particularly preferable that the difference (absolute value) be within a range of 0 to 8° C. or 0 to 5° C. In this way, by intentionally providing a moderate temperature difference between the cooling air supplied to the first area A and the second area B, it is possible to minimize energy loss during air conditioning.

[0039] The booster fan 33 provided in the second duct system 30 may be a circulation fan with a large air volume capable of blowing air drawn in from an inlet out from an outlet. A known type of booster fan 33 may be used. It is preferable to use a booster fan 33 capable of adjusting the air volume. By adjusting the air volume of the booster fan 33, it is possible to adjust the amount of mixed air drawn into the second duct system 30 and the amount of mixed air blown out from the second outlet 36 of the second duct system 30. In addition, the booster fan 33 can be controlled to be turned on / off independently of the air conditioner 10. Therefore, even when the air conditioner 10 is operating, it is possible to air condition only the first area A and stop air conditioning the second area B by turning off the booster fan 33.

[0040] 1, it is preferable to provide the booster fan 33 in the first area A, not in the second area B. The booster fan 33 is generally equipped with an electric motor, which generates heat when the motor is driven, and the upper limit of the ambient temperature during use is generally about 40° C. For this reason, it is preferable to provide the booster fan 33 in the first area A, where it is easier to maintain a relatively low indoor temperature.

[0041] As shown in FIG. 1, the second duct system 30 is provided with a plurality of branch ducts 34, 35 downstream of the booster fan 33 in the second area B. In the embodiment shown in FIG. 1, the second duct system 30 has a first branch duct 34 and a second branch duct 35. The first branch duct 34 and the second branch duct 35 are branched from the introduction duct 31 of the second duct system 30. Specifically, in this embodiment, the first branch duct 34 branches from the introduction duct 31 upstream of the second branch duct 35, and the second branch duct 35 is substantially present on the extension path of the introduction duct 31. The branch ducts 34, 35 do not merge with each other, that is, a closed loop like the loop duct 24 in the first area A is not formed.

[0042] Each of the branch ducts 34, 35 has second air outlets 36 formed at multiple locations spaced apart, and the mixed air flowing through each of the branch ducts 34, 35 is blown out through these second air outlets 36 into the second area B. The positions of the multiple second air outlets 36 are determined for the purpose of supplying mixed air to a local area in the second area B, that is, performing so-called spot conditioning. In other words, the second air outlets 36 may be provided in a position in the second area B where an operator is expected to be located when performing production work.

[0043] 1, it is preferable to provide an air volume adjustment damper 37 in each of the first branch duct 34 and the second branch duct 35. This makes it possible to independently adjust the volume of the mixed air blown out from the second outlet 36 of the first branch duct 34 and the volume of the mixed air blown out from the second outlet 36 of the second branch duct 35. For example, when an operator is present only on the first branch duct 34 side, the air volume adjustment damper 37 of the second branch duct 35 can be closed or the volume of the air can be suppressed, so that the mixed air is blown out only from the second outlet 36 of the first branch duct 34 or the volume of the mixed air blown out from the second outlet 36 of the first branch duct 34 can be increased. When workers are present only on the second branch duct 35 side, the air volume adjustment damper 37 of the first branch duct 34 can be closed or the air volume can be reduced, so that the mixed air is blown out only from the second outlet 36 of the second branch duct 35, or the volume of the mixed air blown out from the second outlet 36 of the second branch duct 35 can be increased. In this way, by providing the air volume adjustment dampers 37 on each of the branch ducts 34, 35, the location within the second area B to which the mixed air is supplied can be set more precisely.

[0044] In this embodiment, the air conditioning system 100 further has a plurality of exhaust ports 40 near the boundary between the first area A and the second area B. In particular, it is preferable that the exhaust port 40 is provided in the communication portion between the first area A and the second area B, that is, in the passage between the first area A and the second area B. The exhaust port 40 is disposed on the ceiling of the air-conditioned space, and exhausts the air in the air-conditioned space (indoors) to the outside of the air-conditioned space (outdoors). In addition, in the case where a vertical wall is formed on the ceiling portion of the boundary between the first area A and the second area B, it is preferable that the exhaust port 40 is disposed along the second area B side of the vertical wall. In this way, by providing a plurality of exhaust ports 40 near the boundary between the first area A and the second area B, it is possible to prevent the indoor air in the second area B, which has a relatively high temperature, from flowing into the first area A during, for example, cooling operation. This suppresses the mixing loss of air-conditioning energy, and makes it easier to maintain the indoor temperature in the first area A.

[0045] In the above, in order to express the contents of the present invention, the present specification has described the embodiments of the present invention with reference to the drawings. However, the present invention is not limited to the above-mentioned embodiments, and includes modifications and improvements that are obvious to a person skilled in the art based on the matters described in the present specification.

[0046] For example, in the embodiment described above, the loop duct 24 is used for the first duct system 20 in the first area A, but the present invention is not limited to this, and the first duct system 20 may be configured to branch into a plurality of ducts rather than being a closed loop. Even with such a branched duct, it is possible to provide area air conditioning for the entire first area A. [Explanation of symbols]

[0047] 10...Air conditioner 20...First duct system 21... Inlet duct 22... Branch air intake 23...Air flow control damper 24...Loop duct 24(a)…Duct on the communication part side 24(b)…Duct on the wall side 24(c)...Farthest part 25...First outlet 30...Second duct system 31...Inlet duct 32…Air intake 33…Booster fan 34...First branch duct 35...Second branch duct 36...Second air outlet 37...Air volume control damper 40...Exhaust vent 100...Air conditioning system A: 1st area B: 2nd area C: Heat generating equipment

Claims

1. An air conditioning system including an air conditioner, a first duct system that supplies conditioned air from the air conditioner to a first area, and a second duct system that supplies air including the conditioned air from the air conditioner to a second area, The first duct system comprises: a plurality of first air outlets for blowing the conditioned air into the first area; a branch air supply port for the conditioned air provided upstream of the first air outlet, The second duct system comprises: an intake port arranged with a predetermined clearance between it and the branch air intake port and configured to take in mixed air obtained by mixing the conditioned air from the branch air intake port and room air; a plurality of second outlets for blowing the mixed air into the second area; a booster fan that sends out the mixed air taken in through the intake port to the second outlet port; Air conditioning system.

2. The clearance is 250 to 2000 mm.

2. The air conditioning system of claim 1.

3. the first duct system is configured to perform area conditioning by supplying the conditioned air to the entire first area, The second duct system is configured to perform spot conditioning by supplying the mixed air to a local area in the second area.

2. The air conditioning system of claim 1.

4. The first duct system includes a loop duct arranged in the first area and configured to form a closed loop. An air conditioning system according to claim 1 or 2.

5. The booster fan is configured to be able to be switched on and off while the air conditioner is running. An air conditioning system according to claim 1 or 2.

6. The second duct system further includes a damper for adjusting the amount of air flowing through the second duct system. An air conditioning system according to claim 1 or 2.

7. In the second duct system, the intake port and the booster fan are provided in the first area, and at least one of the second air outlets is provided in the second area. An air conditioning system according to claim 1 or 2.

8. An air conditioning system including an air conditioner, a first duct system that supplies conditioned air from the air conditioner to a first area, and a second duct system that supplies air including the conditioned air from the air conditioner to a second area, The first duct system comprises: a plurality of first air outlets for blowing the conditioned air into the first area; a branch air supply port for the conditioned air provided upstream of the first air outlet, The second duct system comprises: an intake port arranged with a predetermined clearance between it and the branch air intake port and configured to take in mixed air obtained by mixing the conditioned air from the branch air intake port and room air; a plurality of second outlets for blowing the mixed air into the second area; a booster fan that sends the mixed air taken in through the intake port to the second outlet, the first area is an office area, the second area is a production area in which heat-generating equipment is installed and which is connected to the office area; an exhaust port is provided at a communication portion between the first area and the second area, The first duct system includes a loop duct arranged in the first area to form a closed loop; a duct of the first duct system on the communication portion side is disposed on the first area side relative to the exhaust port, The duct of the first duct system on the opposite side to the communication portion is disposed along the wall of the first area. Air conditioning system.

9. In the first duct system, a duct on the communication portion side has a narrower interval between the first air outlets than a duct on the opposite side to the communication portion.

9. An air conditioning system according to claim 8.

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