Vertical duct for air conditioning system of building

Abstract

To provide a vertical duct for circulating air in a space of lower and upper floors of a building capable of keeping the air in the whole building in a cleaner state while keeping it at optimal temperature and humidity.SOLUTION: Photocatalysts 102 and 105 are sprayed on inner wall surfaces of vertical ducts 44 and 47, and a plurality of baffle plates 202 are arranged at predetermined intervals on a longitudinal major axis 201. The baffle plate 202 is formed in a circular shape and the like, and the inner wall surfaces of the vertical ducts 44 and 47 are provided with LED lights 101 and 104 for illuminating the photocatalysts 102 and 105 with light. A vertical duct fan 51' having an HEPA filter 51c and a Sirocco fan 51d is also used as axial fans 51 and 55 provided in a vertical part of the vertical duct.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to a vertical duct for a building's air conditioning system, which is effective for purifying air in a building's air conditioning system that manages and controls the air throughout the building to keep it uniform. [Background technology]

[0002] As shown in Patent Document 1 below, the inventor has developed an air conditioning system and method for a building that manages and controls the air throughout the building to keep it uniform, and in this technology, a vertical duct is used to circulate air between the spaces on the upper and lower floors.

[0003] The air conditioning system for this building treats the house as a single box, bringing in fresh air and circulating it widely between the first and second floors using axial fans. It also creates forced circulation by creating airflow using ventilation fans in each closed room, and circulating the air inside the building, stirring it up and making it uniform. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2022-74502 Summary of the Invention [Problem to be solved by the invention]

[0005] Meanwhile, in buildings, there is a demand for maintaining cleaner air as a measure against infectious diseases, for example. Here, attention is focused on the fact that titanium dioxide (photocatalyst) decomposes and neutralizes viruses in the air, and the challenge to be solved is to apply photocatalysts to building air conditioning systems to maintain clean air within buildings.

[0006] The present invention has been made in view of the above circumstances, and provides a vertical duct for a building's air conditioning system for circulating air between the spaces on the upper and lower floors of a building, which can keep the air throughout the building at an appropriate temperature and humidity while maintaining a cleaner state. [Means for solving the problem]

[0007] As a means for solving the above problem, the invention described in claim 1 is a vertical duct for circulating air between spaces on the upper and lower floors of a building, A photocatalyst is sprayed onto the inner wall surface of the vertical duct, A vertical duct for a building air conditioning system, characterized in that a plurality of baffles are arranged at predetermined intervals along the longitudinal axis.

[0008] The invention described in claim 2 is a vertical duct used in an air conditioning system of a building for circulating air between spaces on the lower and upper floors of a building, and maintaining appropriate temperatures and humidity in all spaces in the building, including the living space on the lower floor, the shared space on the lower floor, the shared space on the upper floor, other partitioned spaces on the lower floor, and other partitioned spaces on the upper floor, a first air conditioner is installed in the living space on the lower floor, a second air conditioner is installed in one location in the shared space on the upper floor, air path fans are installed horizontally on walls of the other partitioned spaces on the lower floor and walls of the other partitioned spaces on the upper floor to fluidly connect the living space on the lower floor, the shared space on the lower floor, and the shared space on the upper floor with the other partitioned spaces on the lower floor and the other partitioned spaces on the upper floor, and an axial fan is installed in a vertical portion of the vertical duct, The vertical duct has a photocatalyst sprayed on its inner wall surface and a plurality of baffle plates arranged at predetermined intervals on its longitudinal axis, and is installed vertically between the living space on the lower floor and one of the shared spaces on the upper floor to fluidly connect the living space on the lower floor with any one of the shared spaces on the upper floor and other partitioned spaces on the upper floor; A vertical duct for a building's air conditioning system, characterized by:

[0009] The invention described in claim 3 is a vertical duct for a building air conditioning system described in claim 1 or 2, characterized in that LED lighting is provided on the inner wall surface of the vertical duct to irradiate the photocatalyst with light.

[0010] The invention described in claim 4 is the vertical duct for a building air conditioning system described in claim 1 or 2, characterized in that the baffle plate is formed in a circular shape.

[0011] The invention described in claim 5 is a vertical duct for a building air conditioning system described in claim 2, characterized in that the axial fan is a vertical duct fan equipped with a HEPA filter and a sirocco fan. [Effects of the Invention]

[0012] The vertical duct of the present invention provides LED lighting and sprayed photocatalysts in the pathways that properly circulate the air within the building, allowing the air to efficiently come into contact with the photocatalyst, thereby keeping the air throughout the building cleaner. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a longitudinal cross-sectional view of a building conceptually showing a preferred embodiment of the overall configuration of a building air conditioning system equipped with a vertical duct for the building air conditioning system of the present invention. [Figure 2] FIG. 1 is a longitudinal cross-sectional view of a building conceptually showing another preferred embodiment of the overall configuration of an air conditioning system for a building equipped with a vertical duct of the present invention. [Figure 3] FIG. 2 is a schematic diagram showing an example of an intake and exhaust vent installed on the ceiling of the living space on the first floor in FIG. 1. [Figure 4] FIG. 2 is a schematic diagram showing an example of an intake and exhaust vent installed on a wall surface of a shared space on the second floor in FIG. 1. [Figure 5] 2 is a schematic diagram showing an example of an axial flow fan located in a storage room in a shared space on the second floor in FIG. 1. FIG. [Figure 6] FIG. 2 is a schematic diagram showing an example of an intake and exhaust port for an air path dung installed on the wall surface of a WC (toilet) on the first floor in FIG. [Figure 7] 1A and 1B are a longitudinal cross-sectional view (upper view) and a transverse cross-sectional view (lower view) showing a preferred embodiment of a vertical duct of the present invention. [Figure 8] FIG. 1 is a perspective view showing a preferred embodiment of a vertical duct. [Figure 9] FIG. 1 is a vertical cross-sectional view showing a preferred embodiment of an air intake port. [Figure 10] FIG. 1 is a cross-sectional view showing a preferred embodiment of an air inlet. [Figure 11] FIG. 1A is a plan view showing a vertical duct fan, which is a preferred embodiment of an axial flow fan, FIG. 1B is a front view of FIG. 1A, and FIG. 1C is a side view of FIG. [Figure 12] (A) is a partially cutaway plan view showing the internal structure of the vertical duct fan shown in Figure 11, (B) is a partially cutaway front view of (A), and (C) is a partially cutaway side view of (B). [Figure 13] 1 is a block diagram illustrating a preferred embodiment of a sensor and control unit for a building air conditioning system with vertical ducts according to the present invention. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0014] A preferred embodiment of a vertical duct to be provided in an air conditioning system for a building according to the present invention will be described below with reference to the drawings.

[0015] <Air conditioning system design concept> The design concept of the air conditioning system of this embodiment is as follows. First, for example, the air in the living, dining, and kitchen (LDK), which is the center of daily life, is adjusted to an appropriate temperature. By circulating this air throughout the building, temperature variations in the corners and walls of each room are eliminated, and the air throughout the building can be managed and controlled to a uniform temperature. In this case, the LDK functions as a heating or cooling room.

[0016] It is impossible to circulate the air throughout the building using only the ducts used in conventional buildings due to the problem of air volume. In the air conditioning system for the building of this embodiment, in addition to the axial fans in the vertical ducts, air path fans are installed in each room to circulate the air throughout the building.

[0017] In Japanese buildings, where the exterior walls are thin, operating a heating system locally results in large temperature drops on the walls, windows, and periphery of the building, making it impossible to heat the entire building evenly.The air conditioning system of this embodiment circulates air throughout the entire building, including the small toilet space, so the entire building can be heated evenly.

[0018] Furthermore, taking into account humidity levels due to temperature, for example, a humidifier can be operated in winter (dry times) and a dehumidifier in summer (humid times), and humidity-adjusted air can be circulated throughout the building, making it possible to uniformly control the overall humidity level within the building to, for example, an ideal 40-60%.Even highly insulated homes in Western countries do not have the functionality to uniformly adjust the humidity throughout the building.

[0019] By making the temperature uniform throughout the building, the temperature on the interior walls and glass surfaces is less likely to drop. This reduces the risk of condensation and mold. By achieving a temperature and humidity that is gentle on the body, it is possible to create a space that is gentle on the human body's health.

[0020] <Basic configuration of the entire air conditioning system> FIG. 1 is a conceptual longitudinal sectional view of a building showing a preferred embodiment of the overall configuration of an air conditioning system for a building equipped with a vertical duct of the present invention.

[0021] The air conditioning system 1 of this embodiment maintains appropriate temperatures and humidity levels in all spaces within a building, including the living spaces on the lower floors, the shared spaces on the lower floors, the shared spaces on the upper floors, other partitioned spaces on the lower floors, and other partitioned spaces on the upper floors. The upper and lower floors are connected with a minimum number of ducts, and air blowers are appropriately positioned within the ducts. By sending large volumes of air to every corner of each room and space and circulating the air throughout the building, the air is managed and controlled to maintain appropriate temperatures and humidity levels in each room and space throughout the building.

[0022] The building 2 of this embodiment can be a two or more story building, and in FIG. 1, the lower floor is the first floor and the upper floor is the second floor. An example of the living space on the lower floor mentioned above is the living room, dining room, and kitchen 11 on the first floor in FIG. 1. An example of the shared space on the lower floor is the hall 12 on the first floor in FIG. 1. An example of the shared space on the upper floor is the hall 21 on the second floor in FIG. 1. An example of another partitioned space on the lower floor is the toilet (WC) 13 on the first floor in FIG. 1. Examples of other partitioned spaces on the upper floor are the Western-style room 22 and bedroom 23 on the second floor in FIG. 1. The following explanation will be given based on the example of FIG. 1.

[0023] First, it is preferable that the building 2 has high airtightness and heat insulation. In FIG. 1, a heat insulation layer 41 is formed so as to surround the entire building. For example, by surrounding the entire building 2 with a heat insulating material having high airtightness and high heat insulation, it is possible to form a single heat insulation layer 41. The airtightness of the building 2 is C value = 1.0 cm 2 / m 2 Below, UA value = 0.6W / m 2 It is preferable to keep it at .K or less.

[0024] An air conditioner 42 serving as a first air conditioner is installed in the living / dining / kitchen area 11 on the first floor. An air conditioner 43 serving as a second air conditioner is installed in the hall 21 on the second floor. The first and second air conditioners may have at least a heating function and a cooling function. Alternatively, the first and second air conditioners may be separate units each having a heating function and a cooling function. The installation locations of the air conditioners 42 and 43 are not particularly limited, but it is preferable that the installation location of the air conditioner 43 in the hall 21 on the second floor is in a position that takes into consideration the air flow and is easy to perform maintenance in. Note that there are no particular limitations on which spaces the air conditioners are installed in and how many spaces they are installed in, but it is preferable to install one air conditioner in any space on the first floor and one in any space on the second floor.

[0025] A vertical duct 44 is provided between the living / dining / kitchen kitchen 11 on the first floor and the hall 21 on the second floor to fluidly connect them. An intake / exhaust vent 45 on the first-floor living / dining / kitchen kitchen 11 side of the vertical duct 44 is provided in the ceiling 61 of the living / dining / kitchen kitchen 11 on the first floor. FIG. 3 is a schematic diagram showing an example of the intake / exhaust vent 45 provided on the ceiling 61 of the living / dining / kitchen kitchen 11 on the first floor. An intake / exhaust vent 46 on the second-floor hall 21 side of the vertical duct 44 is provided in the wall surface 62 of the hall 21 on the second floor. FIG. 4 is a schematic diagram showing an example of the intake / exhaust vent 46 provided on the wall surface 62 of the hall 21 on the second floor. Note that there are no particular limitations on which lower-floor space and which upper-floor space the vertical duct 44 fluidly connects, but it is preferable to provide the vertical duct 44 so as to connect any space on the first floor where the air conditioner 42 is installed with any space on the second floor where the air conditioner 43 is installed.

[0026] An axial flow fan 51 is provided in the vertical portion of the vertical duct 44. The axial flow fan 51 may be, for example, a counter-arrow fan. In addition, this axial fan 51 can also be suitably implemented by configuring it as a vertical duct fan 51' as shown in Figures 11 and 12 and installing it in the vertical duct 44 (the same applies to the vertical duct 47 described below). The vertical duct fan 51' is equipped with a HEPA (High Efficiency Particulate Air) filter 51c and a sirocco fan 51d with a motor 51e inside a housing 51a. In the figure, reference numeral 51f denotes a control panel, 51b denotes vertical duct connection ports provided at the top and bottom of the housing 51a, and 51g denotes an opening panel for maintenance. Conventional air purifiers have low airflow capacity, so they cannot send air from the first to second floor or from the second to first floor within a building, and so they need the ability to send air between upper and lower floors to maintain uniform temperature and humidity. Therefore, the capacity of the vertical duct fan 51' has been increased, giving it the capabilities of both an air purifier and a blower. Thus, this vertical duct fan 51' equipped with the HEPA filter 51c can further improve the removal rate of airborne viruses, PM2.5, etc.

[0027] The axial fan 51 described above is installed in a position where the living / dining / kitchen area 11 on the first floor and the hall 21 on the second floor are aligned in a straight line. The installation position of the axial fan 51 in the vertical portion of the vertical duct 44 is not particularly limited. However, considering ease of installation and maintenance, the axial fan 51 can be located, for example, inside the storage space of the hall 21 on the second floor. FIG. 5 is a schematic diagram showing the axial fan 51 located inside the storage space of the hall 21 on the second floor. This figure shows the state where the cover 68 covering the opening 69 has been removed. Installation and maintenance of the axial fan 51 can be performed through the opening 69. The vertical duct 44 and the axial fan 51 are covered with insulation 94.

[0028] To circulate air throughout the building 2, air path fans are installed in, for example, each living room, bathroom, and toilet. In the present embodiment shown in FIG. 1 , air path fans 52, 53, and 54 are horizontally installed on a wall 63 of the first-floor WC (toilet) 13, a wall 64 of the second-floor Western-style room 22, and a wall 65 of the second-floor bedroom 23 to fluidly connect the first-floor living / dining / kitchen area 11, the first-floor hall 12, and the second-floor hall 21 with the first-floor WC (toilet) 13, the second-floor Western-style room 22, and the second-floor bedroom 23, respectively. FIG. 6 is a schematic diagram showing an example of an intake / exhaust port 71 of the air path fan 52 installed on the wall 63 of the first-floor WC (toilet) 13. The mounting ducts (not shown) of the air path fans 52, 53, and 54 are made of, for example, steel pipes as a fire prevention measure.

[0029] Air path fan 52 is normally configured to send air from living / dining / kitchen area 11 on the first floor and hall 12 on the first floor to toilet 13 on the first floor. Air path fan 53 is normally configured to send air from hall 21 on the second floor to Western-style room 22 on the second floor. Air path fan 54 is normally configured to send air from hall 21 on the second floor to bedroom 23 on the second floor.

[0030] An exterior wall 90 of the building 2 is provided with air intakes 91, 92, and 93 for taking in outside air into the building 2. In Fig. 1, the air intakes 91, 92, and 93 are provided in the living / dining / kitchen area 11 on the first floor, the Western-style room 22 on the second floor, and the bedroom 23 on the second floor, respectively, but the spaces in which the air intakes are provided and the number of such air intakes are not particularly limited.

[0031] <About the vertical duct configuration> The vertical duct of this embodiment will be described. As shown in Figures 7 and 8, an LED light 101 is provided on the inner wall surface of the vertical duct 44, and a photocatalyst 102 is sprayed onto the inner wall surface. The light from the LED light 101 causes the photocatalyst 102 to perform its catalytic function. The LED light 101 is not particularly limited, but for example, a tape-shaped LED can be used and attached to the wall surface. The brightness of the LED light 101 is not particularly limited, but it is preferable that it is about 320 lm (lumens). The photocatalyst 102 is not particularly limited, but for example, titanium oxide can be used.

[0032] A plurality of baffles 202 are arranged horizontally at predetermined intervals on a major axis 201 in the longitudinal direction within the vertical duct 44. The major axis 201 is preferably the central axis of the vertical duct 44 in the longitudinal direction. The shape and thickness of the baffles 202 are not particularly limited, and for example, in addition to the circular shape shown in the illustration, they can be formed into polygonal shapes such as triangles and rectangles. For example, the baffles 202 may be formed by placing a major axis-shaped rod on the major axis 201 and fixing the rod to the rod. With this configuration, the air resistance within the vertical duct 44 is increased and the airflow is adjusted, thereby improving the contact efficiency of the air with the photocatalyst 102.

[0033] <Air intake configuration> As shown in Figures 9 and 10, LED lighting 104 is provided on the inner wall surfaces of air intakes 91, 92, and 93, and photocatalyst 105 is sprayed onto the inner wall surfaces. Light from the LED lighting 104 causes the photocatalyst 105 to function as a catalyst. The LED lighting 104 is not particularly limited, but for example, a tape-shaped LED can be used and attached to the inner wall surfaces. The brightness of the LED lighting 104 is not particularly limited, but it is preferable that it is about 320 lm (lumens). The photocatalyst 105 is not particularly limited, but for example, titanium oxide can be used.

[0034] <Air flow inside the building> In this embodiment, the air flows inside the building as follows. The air temperature in the first-floor LED 11 is adjusted by an air conditioner 42 installed in the first-floor LED 11 (see arrow D11). This adjusted air flows through a vertical duct 44 to the second-floor hall 21 by the action of a side-flow fan 51 (see arrows D12 and D13). The adjusted air also passes through the first-floor hall 12 and flows to the first-floor WC (toilet) 13 via an air path fan 52 (see arrows A11 and A12). The air that flows to the first-floor WC (toilet) 13 reaches every corner of the first-floor WC (toilet) 13 (see arrows A13 and A14). In addition, outside air is taken into the first-floor living / dining / kitchen 11 through an air intake vent 91 (see arrow A21).

[0035] Air sent from living / dining / kitchen area 11 on the first floor to hall 21 on the second floor, and air conditioned by air conditioner 43 installed in hall 21 on the second floor (see arrow D14) flows from hall 21 on the second floor to Western-style room 22 on the second floor through air path fan 53 (see arrows A15 and A16), and from hall 21 on the second floor to bedroom 23 on the second floor through air path fan 54 (see arrow A19). The air flowing into Western-style room 22 on the second floor and bedroom 23 on the second floor reaches every corner of Western-style room 22 on the second floor and bedroom 23 on the second floor (see arrows A17 and A18). In addition, outside air is taken in from air intakes 92 and 93 into Western-style room 22 on the second floor and bedroom 23 on the second floor, respectively (see arrows A22 and A23).

[0036] In this way, airflow is formed between the first floor living / dining / kitchen area 11, the first floor hall 12, the first floor toilet (WC) 13, the second floor hall 21, the second floor Western-style room 22, and the second floor bedroom 23, allowing the air inside the building 2 to be circulated throughout the building. By providing photocatalysts 102 and 105 in the airflow path and using LED lighting 101 and 104 to function as catalysts, the air inside the entire building 2 can be kept clean.

[0037] <About reversing the rotation of an axial fan> The air flow can be changed by switching the rotation direction of the axial flow fan 51 from forward to reverse or from reverse to forward. Switching between forward and reverse rotation may be performed manually, for example, by a control switch (not shown), or automatically by a control unit 81 (described later) that is provided.

[0038] 2 is a longitudinal cross-sectional view of a building conceptually illustrating another preferred embodiment of the overall configuration of the air-conditioning system 1. The basic configuration of the air-conditioning system 1 is the same as that of FIG. 1, with the only difference being the flow direction of the air flowing through the vertical duct 44 by the axial fan 51. In FIG. 2, the rotation direction of the axial fan 51 is reversed from that of FIG. 1, so that air from the hall 21 on the second floor flows into the living / dining / kitchen room 11 on the first floor (see arrows D23 and D22).

[0039] The direction of air flow through vertical duct 44 is not particularly limited, but for example, when air conditioners 42 and 43 are operating as coolers, axial fan 51 can be set so that air flows from living / dining / kitchen area 11 on the first floor to hall 21 on the second floor, as shown in Figure 1, and when air conditioners 42 and 43 are operating as heaters, axial fan 51 can be set so that air flows from hall 21 on the second floor to living / dining / kitchen area 11 on the first floor, as shown in Figure 2.

[0040] The direction of air flow through the air path fans 52, 53, and 54 is the same in Figures 1 and 2, but the rotation direction of the air path fans 52, 53, and 54 may also be manually or automatically switchable between forward and reverse rotation, as in the case of the axial flow fan 51.

[0041] It is preferable to operate the air conditioners 42 and 43 all year round. By doing so, it is possible to maintain the appropriate temperature and humidity in all spaces, including the first-floor living / dining / kitchen area 11, the first-floor hall 12, the first-floor toilet 13, the second-floor hall 21, the second-floor Western-style room 22, and the second-floor bedroom 23, all year round.

[0042] <About attic storage> If there is, for example, an attic storage space 31 above the second floor as a partitioned space above the second floor hall 21, a vertical duct 47 can be installed between the second floor hall 21 and the attic storage space 31, and an axial fan 55 can be installed in the vertical portion of the vertical duct 47. In FIG. 1, intake and exhaust ports 72, 73 of the vertical duct 47 are installed in the ceiling 66 of the second floor hall 21 and in the wall 67 of the attic storage space 31. It is preferable that the vertical duct 47 be installed so as to connect any space on the second floor where the air conditioner 43 is installed with a partitioned space on the floor above.

[0043] The axial flow fan 55 may be, for example, a counter-arrow fan. As described above, the vertical duct fan 51' shown in FIGS. 11 and 12 is preferably used as the axial flow fan 55 (detailed description is omitted). The axial fan 55 (or vertical duct fan 51', hereinafter the same) is installed in a position where the second floor hall 21 and the attic storage 31 are in a straight line. The installation position of the axial fan 55 in the vertical part of the vertical duct 47 is not particularly limited, but in consideration of ease of installation work and maintenance, the axial fan 55 can be located, for example, inside the storage of the attic storage 31.

[0044] 1 and 2, an axial fan 55 is normally used to draw air from the hall 21 on the second floor into the attic storage space 31 (see arrows D15 and D16). As with the axial fan 51, the rotation direction of the axial fan 55 may be manually or automatically switchable between forward and reverse rotation.

[0045] The configuration inside the vertical duct 47 can be similar to that inside the vertical duct 44, with an LED light 101 provided on the inner wall surface of the vertical duct 47 and a photocatalyst 102 sprayed onto the inner wall surface (FIGS. 7 and 8). The photocatalyst 102 performs its catalytic function when illuminated by the light from the LED light 101. The LED light 101 is not particularly limited, but for example, a tape-shaped LED can be used and attached to the inner wall surface. The brightness of the LED light 101 is not particularly limited, but preferably is, for example, about 320 lm (lumens). The photocatalyst 102 is not particularly limited, but for example, titanium oxide can be used.

[0046] A plurality of baffles 202 are arranged at predetermined intervals on a major axis 201 in the longitudinal direction within the vertical duct 47. The major axis 201 is preferably the central axis of the vertical duct 47 in the longitudinal direction. The shape and thickness of the baffles 202 are not particularly limited, and may be, for example, circular or polygonal, such as triangular or rectangular. For example, the baffles 202 may be formed by arranging a rod shaped like a major axis on the major axis 201 and fixing the rod to the rod. With this configuration, the air resistance within the vertical duct 47 is increased and the airflow is adjusted, thereby improving the contact efficiency of the air with the photocatalyst 102.

[0047] <About floor heating equipment> A floor heating system 48 may be installed at least in the living, dining, and kitchen area 11 on the first floor. At least one of the air conditioner 42 and the floor heating system 48 can be used to heat the air in the living, dining, and kitchen area 11 on the first floor, and the temperature can be managed and controlled. The floor heating system 48 can be a conventional one, whether it is a hot water type or an electric type.

[0048] <Regarding humidity adjustment> A humidifier and a dehumidifier for adjusting humidity can be installed in at least one location in the space within the building. For example, a humidifying air purifier 49 can be used as the humidifier and dehumidifier. In FIGS. 1 and 2, the humidifying air purifier 49 is placed on the floor of the hall 21 on the second floor. By circulating the air whose humidity has been adjusted in the hall 21 on the second floor throughout the building 2 using the air conditioning system 1 described above, the entire building 2 can be uniformly controlled at a constant humidity. There are no particular limitations on the space in which the humidifying air purifier 49 is installed or the number of units, but it is effective to install the humidifying air purifier 49 in a space where an air conditioner is installed, for example.

[0049] <Wind speed inside the building> If the wind speed inside the building 2 is in the range of 0.15 to 0.25 m / sec, the occupants will not feel uncomfortable. Therefore, it is preferable to circulate the air inside the building 2 throughout the building at a wind speed in the range of 0.15 to 0.25 m / sec. By circulating air using the air-conditioning system 1 of this embodiment, the wind speed inside the building 2 can be controlled to be in the range of 0.15 to 0.25 m / sec.

[0050] <About the control unit> The control unit of this embodiment will be described. In order to automatically control the temperature, humidity, wind speed, etc. within the building 2, a control unit 81 may be provided to control the axial fans 51, 55, air path fans 52, 53, 54, air conditioners 42, 43, and humidifying air purifier 49 that constitute the air conditioning system 1 of this embodiment. 12 is a block diagram showing a preferred embodiment of the sensor and control unit 81. For example, in the case of the axial fans 51, 55 and the air path fans 52, 53, and 54, the fan control means 84 is configured to control the on / off, rotation direction, air volume, etc. of the axial fans 51, 55 and the air path fans 52, 53, and 54 according to the air conditions in the building 2. In the case of the air conditioners 42 and 43, the temperature control means 85 is configured to control the on / off, heating / cooling switching, air volume, etc. of the air conditioners 42 and 43 according to the temperature in the building 2. In the case of the humidifying air purifier 49, the humidity control means 86 is configured to control the on / off, humidification / dehumidification switching, air volume, etc. of the humidifying air purifier 49 according to the humidity in the building 2. To measure the air volume, temperature, and humidity, for example, an air volume sensor 87, a temperature sensor 88, and a humidity sensor 89 can be used, respectively. The sensors 87, 88, and 89 may be installed in a predetermined space, taking into consideration the necessity and effectiveness of the measurements, for example. The control unit 81 may have at least a CPU (Central Processing Unit) 82 and a storage device 83, and executes the above-mentioned control means 84, 85, and 86 based on inputs from the sensors 87, 88, and 89. Each of the control means 84, 85, and 86 may be configured to have a CPU and a storage device.

[0051] While the present invention has been described above based on the embodiments, it should be noted that the present invention is not limited to the illustrated examples and includes design modifications and application variations that would normally be made by a person skilled in the art, provided they do not deviate from the technical concept of the present invention. For example, the building layout is not limited to those shown in Figures 1 and 2. The number and location of vertical ducts, air intakes, and air conditioners can be appropriately set according to the layout of the building in which the air conditioning system is installed. Furthermore, the air conditioning system is not limited to the present embodiment, and the vertical duct of the present invention can be applied to air conditioning systems in various buildings. [Explanation of symbols]

[0052] 1. Air conditioning system 2. Building 11 1st floor living / dining / kitchen area (living space on the lower floor) 12 Hall on the first floor (shared space on the lower floor) 13 WC (Toilet) (Other enclosed spaces on lower floor) 21 Second floor hall (upper floor shared space) 22 Western-style room on the second floor (and other partitioned spaces on the upper floors) 23 Bedrooms on the second floor (and other partitioned spaces on the upper floor) 31 Attic storage (separated space on the upper floor) 41 Insulation layer 42 Air conditioner (first air conditioner) 43 Air conditioner (second air conditioner) 44, 47 Vertical duct 48 Floor heating system 49 Humidifier air purifier (humidifier and dehumidifier) 51, 55 Axial flow fan 51' Vertical Duct Fan 51a housing 51b Vertical duct connection port 51c HEPA filter 51d Sirocco fan 51e motor 51f control board 51g Maintenance opening panel 52, 53, 54 Air pass fans 81 Control Unit 84 Fan control means 85 Temperature control means 86 Humidity Control Means 87 Air flow sensor 88 Temperature Sensor 89 Humidity Sensor 90 Exterior Wall 91, 92, 93 Air supply port 101, 104 LED lighting 102, 105 photocatalyst 201 Long axis (rod) 202 Baffle Plate

Claims

1. A vertical duct for circulating air between the upper and lower floors of a building. A photocatalyst is sprayed onto the inner wall surface of the vertical duct, A vertical duct for a building air conditioning system, characterized in that a plurality of baffles are arranged at predetermined intervals on the longitudinal axis.

2. A vertical duct used in a building's air conditioning system to circulate air between the lower and upper floors of a building and to maintain appropriate temperatures and humidity in all spaces in the building, including the living space on the lower floor, the common space on the lower floor, the common space on the upper floor, other partitioned spaces on the lower floor, and other partitioned spaces on the upper floor, a first air conditioner is installed in the living space on the lower floor, a second air conditioner is installed at one location in the shared space on the upper floor, air path fans are installed horizontally on walls of the other partitioned spaces on the lower floor and walls of the other partitioned spaces on the upper floor to fluidly connect the living space on the lower floor, the shared space on the lower floor, and the shared space on the upper floor with the other partitioned spaces on the lower floor and the other partitioned spaces on the upper floor, and an axial fan is installed in a vertical portion of the vertical duct, The vertical duct has a photocatalyst sprayed on its inner wall surface and a plurality of baffle plates arranged at predetermined intervals on its longitudinal axis, and is installed vertically between the living space on the lower floor and one of the shared spaces on the upper floor to fluidly connect the living space on the lower floor with one of the shared spaces on the upper floor and other partitioned spaces on the upper floor; Vertical ducts for building air conditioning systems, characterized by:

3. 3. The vertical duct for a building air conditioning system according to claim 1, wherein an LED light source is provided on an inner wall surface of the vertical duct to irradiate the photocatalyst with light.

4. 3. A vertical duct for a building air conditioning system according to claim 1 or 2, characterized in that the baffle plate is formed in a circular shape.

5. 3. The vertical duct for a building air conditioning system according to claim 2, wherein the axial fan is a vertical duct fan equipped with a HEPA filter and a sirocco fan.

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