Central air conditioning system, apartment complex

Abstract

To provide a technique that restrains a decrease in utilization efficiency of a space even when executing whole building air conditioning.SOLUTION: An air conditioner 300 is provided above a corridor 14, and comprises a discharge port 304 for discharging conditioned air to the corridor 14. A buffer space 150 is provided on an upper lateral side of the corridor 14 so as to be adjacent to the corridor 14, and a first side surface 152a is opened to the corridor 14. A circulation unit 350 comprises: a buffer suction port 352 arranged in an upper surface 154 of the buffer space 150, and for sucking air in the buffer space 150; and an air blowing part for blowing the air sucked from the buffer suction port 352, to a living room.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to air conditioning technology, and more particularly to a central air conditioning system for controlling the air conditioning of multiple rooms, and an apartment building. [Background technology]

[0002] In central air conditioning, an air conditioning unit blows temperature-controlled air to each room in a building. The air conditioning unit is connected to multiple ducts for supplying the temperature-controlled air to each room (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-39610 Summary of the Invention [Problem to be solved by the invention]

[0004] Air conditioning units are installed in an air-conditioning room, which is a space enclosed by walls. In other words, to achieve whole-house air conditioning, a home needs an air-conditioning room. However, in apartment complexes and other multi-family housing, the size of each home is often limited, making it difficult to secure an air-conditioning room in such homes.

[0005] The present disclosure has been made in consideration of these circumstances, and its purpose is to provide a technology that suppresses a decrease in space utilization efficiency even when whole-building air conditioning is performed. [Means for solving the problem]

[0006] In order to solve the above problems, a whole-house air conditioning system according to one embodiment of the present disclosure comprises an air conditioner that is installed above a shared space extending from the entrance to the living rooms and that has an air outlet that blows conditioned air into the shared space, a buffer space that is installed adjacent to the shared space at an upper lateral side thereof and that has a side that is open to the shared space, and a circulation unit that is arranged on a side different from the side of the buffer space and that has a buffer air intake that draws in air from the buffer space and an air blower that blows the air drawn in through the buffer air intake into the living rooms. The volume of the buffer space is smaller than the volume of the shared space, and the air conditioner has a wind direction control unit that directs the air outlet toward the side of the buffer space. The conditioned air blown out by the air conditioner from the air outlet is sent into the buffer space via the shared space. The lower part of the buffer space belongs to the living room adjacent to the shared space. . Another aspect of the present disclosure is also a central air conditioning system. This system includes an air conditioner installed above a shared space extending from the entrance to the living rooms and equipped with an air outlet for blowing conditioned air into the shared space; a buffer space installed adjacent to the shared space at an upper lateral position and with a side open to the shared space; a circulation unit located on a side different from the side of the buffer space and equipped with a buffer air inlet for drawing air into the buffer space and a blower for blowing the air drawn in through the buffer air inlet into the living rooms. The volume of the buffer space is smaller than the volume of the shared space, and the air conditioner is equipped with a wind direction control unit for directing the air outlet toward the side of the buffer space. The conditioned air blown out by the air conditioner from the air outlet is sent into the buffer space via the shared space, and the area below the buffer space belongs to the shared space. Yet another aspect of the present disclosure is also a central air conditioning system. This system includes an air conditioner located above a shared space extending from the entrance to the living rooms and having an air outlet that blows conditioned air into the shared space; a buffer space located adjacent to the shared space at an upper lateral position and with a side open to the shared space; and a circulation unit located on a side different from the side of the buffer space and having a buffer air inlet that draws in air from the buffer space and a blower that blows the air drawn in through the buffer air inlet into the living rooms. The volume of the buffer space is smaller than the volume of the shared space, and the air conditioner is equipped with a wind direction control unit that directs the air outlet toward the side of the buffer space. The conditioned air blown out from the air outlet by the air conditioner is sent into the buffer space via the shared space, and the airflow rate of the air conditioner is smaller than the airflow rate of the circulation unit.

[0007] Any combination of the above components, and conversion of the present disclosure into a method, device, system, recording medium, computer program, etc., are also valid aspects of the present disclosure. [Effects of the Invention]

[0008] According to the present disclosure, even when whole-building air conditioning is performed, a decrease in space utilization efficiency can be suppressed. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram showing the configuration of a house according to an embodiment of the present invention. [Figure 2] 2(a)-(b) are enlarged views of a portion of the house in FIG. [Figure 3] 3(a) to 3(c) are diagrams showing the configuration of the circulation unit of FIG. [Figure 4] FIG. 2 is a diagram illustrating a configuration of a system controller in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] Before describing specific embodiments of the present disclosure, an overview of the embodiments will be described. The present embodiment relates to a central air conditioning system that is installed in an apartment building, such as an condominium, where multiple residences are housed together, and performs central air conditioning for each residence. In the central air conditioning system, air conditioned in a central air conditioning unit is discharged from an outlet provided in each living room. Conventional central air conditioning systems require an air-conditioning room, which is a dedicated space, to install the central air conditioning unit. However, since the size of a residence is often limited, it is difficult to secure an air-conditioning room in a residence.

[0011] To address this issue, the central air conditioning system of this embodiment separates the central air conditioning unit into an air conditioner with air conditioning function and a circulation unit with air blowing function. The air conditioner is installed on the ceiling of a shared space such as a hallway, and a recessed space is provided in the upper part of the wall of the hallway as a buffer space, in which the circulation unit is installed. In this configuration, the air conditioner blows conditioned air toward the buffer space. The circulation unit draws in the air blown from the air conditioner toward the buffer space and discharges the drawn-in air from outlets provided in each living room.

[0012] The examples described below each illustrate a preferred specific example of the present disclosure. Therefore, the numerical values, shapes, materials, components, component placement and connection configurations, steps (processes), and step order shown in the following examples are merely examples and are not intended to limit the present disclosure. Therefore, among the components in the following examples, components that are not described in the independent claims that represent the highest concept of the present disclosure are described as optional components. Furthermore, in each figure, substantially identical components are designated by the same reference numerals, and redundant descriptions are omitted or simplified.

[0013] FIG. 1 shows the configuration of a house 500. The house 500 is a single-family residence in a multi-family housing complex such as an apartment building. Here, as an example, the upper side of FIG. 1 is the north side, the lower side is the south side, the left side is the west side, and the right side is the east side. The house 500 includes first living room 10a through sixth living room 10f, collectively referred to as living rooms 10, a hallway 12, a corridor 14, and a buffer space 150. The first living room 10a is a kitchen, the second living room 10b is a living room, the third living room 10c, the fourth living room 10d, and the fifth living room 10e are Western-style rooms, and the sixth living room 10f is a bathroom. Furthermore, at least one of the hallway 14 and the entrance 12 may be referred to as a shared space 16.

[0014] The whole-house air conditioning system installed in the house 500 includes an outside air inlet 100, an outside air inlet duct 102, a heat exchanger device 104, an exhaust duct 106, an exhaust port 108, an air supply duct 110, first to third transport ducts 122a to 122c collectively referred to as transport ducts 122, a first branch chamber 124a and a second branch chamber 124b collectively referred to as branch chambers 124, first to eighth branch transport ducts 126a to 126h collectively referred to as branch transport ducts 126, and first to eighth air outlets 128a to 128h collectively referred to as air outlets 128. The outside air inlet duct 102, the exhaust duct 106, the air supply duct 110, the transport duct 122, and the branch transport ducts 126 are pipes that transport air, that is, air paths. The central air conditioning system also includes an air conditioner 300 , a circulation unit 350 , a system controller 400 , and a temperature sensor 402 .

[0015] The outdoor air inlet 100 is installed on the south wall of the house 500. An outdoor air inlet duct 102 extending from the outdoor air inlet 100 toward the interior of the house 500 is connected to a heat exchanger device 104. The heat exchanger device 104 is disposed, for example, in the attic of the sixth living room 10f. An exhaust duct 106 is also connected to the heat exchanger device 104, and the exhaust duct 106 extends toward the south wall of the house 500 and is connected to an exhaust port 108 installed on the south wall. An air supply duct 110 is also connected to the heat exchanger device 104.

[0016] The heat exchanger device 104 is also called a heat exchange type ventilation fan. The heat exchanger device 104 takes in outside air 200 from the outside air inlet 100 through the outside air inlet duct 102. The outside air 200 drawn in through the outside air inlet 100 corresponds to supply air. The heat exchanger device 104 also takes in ventilation return air (RA) 202 through the ventilation opening 114. The ventilation return air 202 is indoor air flowing in from the interior of the house 500, for example, from rooms including at least one of the living room 10 and the common space 16. The heat exchanger device 104 exchanges heat therebetween. As a result of the heat exchange, the heat exchanger device 104 discharges exhaust air 204 from the exhaust opening 108 through the exhaust duct 106. The heat exchanger device 104 also supplies the heat-exchanged supply air to the circulation unit 350 via the intake air duct 110.

[0017] 2(a)-(b) are also used to explain the air conditioner 300, buffer space 150, and circulation unit 350 in the whole-house air-conditioning system. FIGS. 2(a)-(b) are enlarged views of a portion of a house 500. FIG. 2(a) is a perspective view of the hallway 14 in FIG. 1 as seen from the entrance 12, and FIG. 2(b) is a front view of FIG. 2(a) as seen from the entrance 12. The hallway 14 is a space surrounded by a ceiling 30 located above, a floor 32 located below, and a first wall 40 and a second side 42 located on both the left and right sides.

[0018] The air conditioner 300 is installed above the hallway 14 leading from the entrance 12 to the living room 10, i.e., in the attic 34 above the ceiling 30. An air inlet 302 and an air outlet 304 are arranged on the underside of the air conditioner 300, and the air inlet 302 and the air outlet 304 are exposed from the ceiling 30 toward the hallway 14. Circulating air RA206 flows into the air inlet 302 from the hallway 14 inside the house 500. Like the ventilation air RA202, the circulation air RA206 corresponds to the supply air that has traveled inside the house 500. The air conditioner 300 is an air conditioner and performs air conditioning on the circulation air RA206. The air conditioner 300 controls the temperature, humidity, etc. of the circulation air RA206 so that the temperature in the hallway 14 becomes a set temperature (hereinafter referred to as the "set temperature"). The set temperature is set by the system controller 400. The air outlet 304 blows out the conditioned air into the hallway 14.

[0019] A buffer space 150 is provided above the first wall surface 40 as a space adjacent to the corridor 14 in which the air conditioner 300 is installed. The buffer space 150 has a box-like shape, and a first side surface 152a of the buffer space 150 on the corridor 14 side is an opening that is open to the corridor 14. An upper surface 154 of the buffer space 150 on the upper side is connected to the ceiling 30, and a buffer intake port 352 of a circulation unit 350 installed in the attic 34 is exposed on the upper surface 154. The sides of the buffer space 150 other than the first side surface 152a (hereinafter collectively referred to as "second side surface 152b") and a lower surface 156 of the buffer space 150 on the lower side are closed flat surfaces.

[0020] 3(a)-(c) show the configuration of a circulation unit 350. The circulation unit 350 in FIG. 3(a) includes a buffer air intake 352, an outside air intake 354, a mixing space 360, a HEPA (High Efficiency Particulate Air) filter 362, and a blower 364. The buffer air intake 352 draws in air from the buffer space 150, i.e., air blown out from the air conditioner 300. The outside air intake 354 draws in outside air that has been heat exchanged by the heat exchanger device 104. The outside air intake 354 is connected to the supply air duct 110 and draws in outside air that has been heat exchanged by the heat exchanger device 104.

[0021] The mixing space 360 ​​is connected to the buffer air intake port 352 and also to the outside air intake port 354. The mixing space 360 ​​mixes the outside air drawn in through the outside air intake port 354 with the air drawn in through the buffer air intake port 352. The HEPA filter 362 is an air filter or purification filter that is disposed downstream of the mixing space 360 ​​and removes dirt, dust, and the like from the air mixed in the mixing space 360, thereby outputting purified air. The blower 364 transports the air purified by the HEPA filter 362 through the first conveying duct 122a connected to the air outlet 356. Therefore, the air outlet 356 blows the mixed air to the first conveying duct 122a. The circulation unit 350 can be controlled independently of the air conditioner 300, and is controlled, for example, by the system controller 400. Figures 3(a)-(c) will be discussed later, and we will return to Figures 1 and 2(a)-(b).

[0022] In the above configuration, the air outlet 304 of the air conditioner 300 is directed toward the first side surface 152a of the buffer space 150, so the air conditioner 300 blows out conditioned air toward the buffer space 150. Furthermore, the volume of the buffer space 150 is made smaller than the volume of the corridor 14, and the volume of air blown out from the air inlet 302 of the air conditioner 300 is made smaller than the volume of air drawn into the buffer air inlet 352 of the circulation unit 350. As a result, the conditioned air blown out from the air inlet 302 by the air conditioner 300 is sent into the buffer space 150 via the corridor 14, making it easier for the buffer space 150 to be filled with conditioned air. The air drawn in by the buffer air inlet 352 of the circulation unit 350 mainly contains conditioned air. In this way, by providing the buffer space 150, installing the air conditioner 300 in the corridor 14 near the buffer space 150, and installing the circulation unit 350 in the buffer space 150, an air conditioning room is no longer necessary. In addition, the area below the buffer space 150 belongs to the fifth living room 10e adjacent to the corridor 14.

[0023] The first transfer duct 122a branches into a second transfer duct 122b and a third transfer duct 122c. The second transfer duct 122b extends to the first branch chamber 124a, where it branches into a first branch transfer duct 126a and a fourth branch transfer duct 126d. The first branch transfer duct 126a is connected to a first air outlet 128a installed in the first living room 10a. The second branch transfer duct 126b is connected to a second air outlet 128b installed in the second living room 10b, and the third branch transfer duct 126c is connected to a third air outlet 128c installed in the second living room 10b. The fourth branch transfer duct 126d is connected to a fourth air outlet 128d installed in the third living room 10c.

[0024] The third transfer duct 122c extends to the second branch chamber 124b and branches into a fifth branch transfer duct 126e to an eighth branch transfer duct 126h in the second branch chamber 124b. The fifth branch transfer duct 126e is connected to a fifth air outlet 128e installed in the fourth room 10d, and the sixth branch transfer duct 126f is connected to a sixth air outlet 128f installed in the fourth room 10d. The seventh branch transfer duct 126g is connected to a seventh air outlet 128g installed in the fifth room 10e. The eighth branch transfer duct 126h is connected to an eighth air outlet 128h installed in the hallway 14.

[0025] The air conditioner 300 transports the conditioned air from the first room 10a to the third room 10c via the first transfer duct 122a, the second transfer duct 122b, the first branch chamber 124a, the first branch transfer duct 126a to the fourth branch transfer duct 126d, and the first air outlet 128a to the fourth air outlet 128d.The air conditioner 300 transports the conditioned air to the fourth room 10d, the fifth room 10e, and the hallway 14 via the first transfer duct 122a, the third transfer duct 122c, the second branch chamber 124b, the fifth branch transfer duct 126e to the eighth branch transfer duct 126h, and the fifth air outlet 128e to the eighth air outlet 128h.

[0026] Each air outlet 128 is installed on the side wall surface or ceiling surface of each living room 10, and discharges air sent from the circulation unit 350 into each living room 10. Since each living room 10 is connected to the corridor 14, when air is blown out from the air outlet 128, the air originally present in the living room 10 is also circulated into the corridor 14. A portion of the circulated air flows into the air conditioner 300 from the air inlet 302 as circulation RA206. Another portion of the circulated air is taken into the heat exchanger device 104 from the ventilation opening 114 as ventilation RA202.

[0027] The temperature sensor 402 is installed in the second living room 10b and detects the temperature of the house 500, for example, the second living room 10b. The temperature sensor 402 has a communication function such as wireless communication, and transmits the detected temperature to the system controller 400.

[0028] The system controller 400 is a controller that controls the entire central air-conditioning system. The system controller 400 is communicably connected to the air conditioners 300, the circulation units 350, and the temperature sensors 402 via wireless communication. At least some of these may be communicably connected via wired communication. The system controller 400 receives the temperature from the temperature sensors 402.

[0029] The system controller 400 also has an interface for receiving input of information necessary to construct a central air-conditioning system. For example, the system controller 400 receives the temperature to be set in the central air-conditioning system (hereinafter referred to as the "set temperature"). The system controller 400 executes control over the air conditioners 300 and the circulation unit 350 based on the received temperature and the set temperature. The system controller 400 transmits operational instructions to the air conditioners 300, and transmits operational instructions to the air blower 364 of the circulation unit 350 to the circulation unit 350.

[0030] The interface function of the system controller 400 may be provided in a communication device that is separate from the system controller 400 and that is capable of communicating with the system controller 400. The communication device is, for example, a mobile phone, a smartphone, or a tablet terminal.

[0031] 4 shows the configuration of the system controller 400. The system controller 400 is connected to a temperature sensor 402, an operation unit 410, the air conditioner 300, and the circulation unit 350, and includes a control unit 412 and a memory unit 414. The operation unit 410 is the interface described above, and receives the set temperature. The operation unit 410 outputs the set temperature to the system controller 400. When the temperature sensor 402 detects the temperature of the room 10, it outputs the temperature of the room 10 to the system controller 400.

[0032] The control unit 412 controls the temperature of the air conditioner 300 and controls the air volume of the circulation unit 350 based on the temperature of the room 10 and the set temperature. Known technologies can be used for temperature control and air volume control, so a detailed description will be omitted here, but data stored in the memory unit 414 may be used for the temperature control and air volume control. The air direction control unit 310 of the air conditioner 300 controls the air outlet 304 to face the first side surface 152a of the buffer space 150. The air direction control unit 310 may be an air deflector that fixes the air direction in one direction.

[0033] FIG. 3(b) is a modified example of the circulation unit 350 in FIG. 3(a). In FIG. 3(b), the circulation unit 350 in FIG. 3(a) is separated into a first circulation unit 350a and a second circulation unit 350b. The first circulation unit 350a includes a buffer intake port 352, an outside air intake port 354, a mixing space 360, and a HEPA filter 362, and the second circulation unit 350b includes a blower section 364. FIG. 3(c) is also a modified example of the circulation unit 350 in FIG. 3(a). In FIG. 3(c), the circulation unit 350 in FIG. 3(a) and the branch chamber 124 are integrally combined.

[0034] The subject of the device, system, or method of the present disclosure includes a computer. The computer executes a program to realize the functions of the subject of the device, system, or method of the present disclosure. The computer includes, as its main hardware component, a processor that operates according to the program. The processor may be of any type, as long as it can realize the functions by executing the program. The processor may be composed of one or more electronic circuits, including a semiconductor integrated circuit (IC) or a large-scale integration (LSI). The electronic circuits may be integrated into a single chip or may be provided on multiple chips. The multiple chips may be integrated into a single device or may be provided on multiple devices. The program is recorded on a non-transitory recording medium, such as a computer-readable ROM, optical disk, or hard disk drive. The program may be pre-stored on the recording medium or may be supplied to the recording medium via a wide-area communication network, including the Internet.

[0035] According to this embodiment, the air conditioner 300 is provided above the shared space 16, and the circulation unit 350 is provided in the buffer space 150 adjacent to the shared space 16, thereby eliminating the need for an air-conditioning room for whole-house air conditioning. Furthermore, because an air-conditioning room for whole-house air conditioning is not required, a decrease in space utilization efficiency can be suppressed even when whole-house air conditioning is performed. Furthermore, because the volume of the buffer space 150 is smaller than the volume of the shared space 16, and the air conditioner 300 has its air outlet 304 facing the side of the buffer space 150, it is easy to fill the buffer space 150 with conditioned air. Furthermore, because the buffer space 150 is filled with conditioned air, whole-house air conditioning can be performed without providing an air-conditioning room.

[0036] The buffer space 150 is open to the shared space 16 at the first side 152a and connected to the circulation unit 350 via the top surface 154. The other surfaces are closed to other spaces, creating a small space capable of drawing in conditioned air. The lower portion of the buffer space 150 belongs to the living room 10 adjacent to the shared space 16, allowing for efficient use of the space. The shared space 16 includes at least one of the hallway 14 and the entrance 12, enhancing flexibility in design. The airflow rate of the air conditioner 300 is smaller than the airflow rate of the circulation unit 350, allowing the air blown out from the air conditioner 300 to be efficiently guided into the buffer space 150. The circulation unit 350 mixes the outside air that has been heat exchanged by the heat exchanger device 104 with the air drawn in through the buffer air intake 352, enabling whole-house air conditioning. The circulation unit 350 includes a HEPA filter 362, purifying the air.

[0037] An overview of one aspect of the present disclosure is as follows: A whole-house air-conditioning system of one aspect of the present disclosure includes: an air conditioner (300) provided above a shared space (16) extending from an entrance (12) to living rooms (10) and having an air outlet (304) that blows conditioned air into the shared space (16), a buffer space (150) provided adjacent to the shared space (16) at an upper lateral side thereof and having a side that is open to the shared space (16), a circulation unit (350) disposed on another side different from the side of the buffer space (150) and having a buffer air intake (352) that draws in air from the buffer space (150) and an air blower (364) that blows the air drawn in through the buffer air intake (352) into the living rooms (10). The volume of the buffer space (150) is smaller than the volume of the shared space (16), and the air conditioner (300) includes an air direction control unit (310) that directs the air outlet (304) toward the side of the buffer space (150). The conditioned air blown out from the air outlet (304) by the air conditioner (300) is sent into the buffer space (150) via the shared space (16).

[0038] The buffer space (150) has a side surface that is open to the shared space (16) and is connected to the circulation unit (350) via the other surface, and the surfaces other than the side surface and the other surface are closed to other spaces.

[0039] The lower part of the buffer space (150) may belong to the living room (10) adjacent to the common space (16).

[0040] The lower part of the buffer space (150) may belong to the shared space (16).

[0041] The common space (16) may include at least one of a hallway (14) and a hallway (12).

[0042] The volume of air blown out from the air conditioner (300) is smaller than the volume of air taken in from the circulation unit (350).

[0043] The circulation unit (350) may further include a heat exchanger device (104) that exhausts indoor air from a room including at least one of the living room (10) and the common space (16) to the outside and draws in outdoor air from the outside, thereby performing heat exchange between the indoor air and the outdoor air. The circulation unit (350) may include an outdoor air intake port (354) that draws in the outdoor air that has been heat exchanged by the heat exchanger device (104), and a mixing space (360) that mixes the outdoor air drawn in through the outdoor air intake port (354) with the air drawn in through the buffer air intake port (352).

[0044] The circulation unit (350) may further include a purification filter (362) disposed after the mixing space (360) and purifying the mixed air.

[0045] The present disclosure has been described above based on examples. These examples are merely illustrative, and it will be understood by those skilled in the art that various modifications are possible in the combination of each component or each treatment process, and that such modifications are also within the scope of the present disclosure.

[0046] In this embodiment, the lower part of the buffer space 150 belongs to the living room 10 adjacent to the shared space 16. However, this is not limited to this, and for example, the lower part of the buffer space 150 may belong to the shared space 16. According to this modification, the degree of freedom in the configuration can be improved.

[0047] In the central air-conditioning system of this embodiment, the air conditioners 300 and circulation units 350 operate using the system controller 400 and temperature sensor 402. However, this is not limiting, and for example, the air conditioners 300 and circulation units 350 may operate independently of each other without using the system controller 400 and temperature sensor 402. In other words, the air conditioners 300 and circulation units 350 may operate independently. According to this modified example, the configuration can be simplified. [Explanation of symbols]

[0048] 10 living room, 12 entrance, 14 corridor, 16 shared space, 30 ceiling, 32 floor, 34 attic, 40 first wall, 42 second side, 100 outside air intake, 102 outside air intake duct, 104 heat exchanger device, 106 exhaust duct, 108 exhaust port, 110 intake air duct, 114 ventilation port, 122 transport duct, 124 branch chamber, 126 branch transport duct, 128 air outlet, 150 buffer space, 152 side, 154 top, 156 bottom, 200 outside air, 202 ventilation RA, 204 exhaust, 206 circulation RA, 300 air conditioner, 302 intake port, 304 Air outlet, 310 air direction control unit, 350 circulation unit, 352 buffer intake port, 354 outside air intake port, 356 air outlet, 360 mixing space, 362 HEPA filter, 364 air outlet unit, 400 system controller, 402 temperature sensor, 410 operation unit, 412 control unit, 414 memory unit, 500 residence.

Claims

1. an air conditioner that is provided above a shared space extending from the entrance to the living room and has an air outlet that blows conditioned air into the shared space; a buffer space provided adjacent to the shared space on an upper side of the shared space, the side of the buffer space being open to the shared space; a circulation unit that is disposed on a surface of the buffer space different from the side surface, and that includes a buffer air intake port that draws in air from the buffer space, and an air blower that blows the air drawn in through the buffer air intake port into the living room, a volume of the buffer space is smaller than a volume of the shared space; the air conditioner includes a wind direction control unit that directs the air outlet toward the side surface of the buffer space, The conditioned air blown out from the air outlet by the air conditioner is sent to the buffer space via the shared space, Below the buffer space is a whole-building air conditioning system belonging to the room adjacent to the shared space.

2. an air conditioner that is provided above a shared space extending from the entrance to the living room and has an air outlet that blows conditioned air into the shared space; a buffer space provided adjacent to the shared space on an upper side of the shared space, the side of the buffer space being open to the shared space; a circulation unit that is disposed on a surface of the buffer space different from the side surface, and that includes a buffer air intake port that draws in air from the buffer space, and an air blower that blows the air drawn in through the buffer air intake port into the living room, a volume of the buffer space is smaller than a volume of the shared space; the air conditioner includes a wind direction control unit that directs the air outlet toward the side surface of the buffer space, The conditioned air blown out from the air outlet by the air conditioner is sent to the buffer space via the shared space, Below the buffer space is a whole-building air conditioning system belonging to the shared space.

3. The buffer space is the side is open to the shared space; connected to the circulation unit via the other surface, 3. The central air-conditioning system according to claim 1, wherein surfaces other than the side surface and the other surface are closed to other spaces.

4. The central air-conditioning system according to claim 1 , wherein the shared space includes at least one of a corridor and an entrance hall.

5. The central air-conditioning system according to claim 1 , wherein an airflow rate of the air conditioner is smaller than an airflow rate of the circulation unit.

6. an air conditioner that is provided above a shared space extending from the entrance to the living room and has an air outlet that blows conditioned air into the shared space; a buffer space provided adjacent to the shared space on an upper side of the shared space, the side of the buffer space being open to the shared space; a circulation unit that is disposed on a surface of the buffer space different from the side surface, and that includes a buffer air intake port that draws in air from the buffer space, and an air blower that blows the air drawn in through the buffer air intake port into the living room, a volume of the buffer space is smaller than a volume of the shared space; the air conditioner includes a wind direction control unit that directs the air outlet toward the side surface of the buffer space, The conditioned air blown out from the air outlet by the air conditioner is sent to the buffer space via the shared space, A whole-building air-conditioning system in which the air-conditioner's blowing air volume is smaller than the air-intake air volume of the circulation unit.

7. a heat exchanger device that exhausts indoor air from a room including at least one of the living room and the shared space to the outside and draws in outdoor air from the outside, and performs heat exchange processing between the indoor air and the outdoor air; The circulation unit comprises: an outside air intake port that draws in the outside air that has been heat exchanged by the heat exchanger device; The central air-conditioning system according to claim 1 , further comprising: a mixing space for mixing the outside air drawn in through the outside air intake port and the air drawn in through the buffer air intake port.

8. The circulation unit comprises: The central air-conditioning system according to claim 7, further comprising a purification filter arranged downstream of the mixing space and purifying the mixed air.

9. An apartment building equipped with the central air-conditioning system according to any one of claims 1 to 8.

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