Central air conditioning system

Abstract

To provide a whole building air conditioning system having good maintainability and capable of air-conditioning the whole of a building even if the building has a large site area.SOLUTION: The central air-conditioning system 100 includes an air-conditioned machine room 10 provided in a non-living room in a building, an underfloor space 20 provided in the building, a ventilator 11 and an air conditioner 13 disposed in the air-conditioned machine room 10, a suction port 33 provided in a part of the air-conditioned machine room 10 to take air in the building into the air-conditioned machine room 10, an opening 34 provided in a part of a floor surface of the air-conditioned machine room 10 so as to communicate with the underfloor space 20, and a floor blowout port 35 provided in a floor surface of a living room 60 or the like in the building so as to communicate with the underfloor space 20 to supply conditioned air SA into the building. The ventilation device 11 is disposed in an upper portion of the air conditioning machine room 10, the air conditioner 13 is disposed in a lower portion of the air conditioning machine room 10, and the floor blowout port 35 is provided in each of a plurality of living rooms 60 and the like in the building.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a central air conditioning system that takes air from inside a building into an air conditioning room, conditions the air with a ventilation system and an air conditioner, and supplies the conditioned air to the building via an underfloor space. [Background technology]

[0002] Various structures and functions have been proposed as central air conditioning systems capable of air conditioning the entire building. Patent documents 1 and 2 particularly relate to the present invention.

[0003] Patent Document 1 describes an air conditioning system that uses the underfloor space in a room as an air flow path during air conditioning. This air conditioning system is intended to be installed in a room structure while ensuring sufficient living space, and includes an air conditioning unit and a ventilation unit that perform air conditioning and ventilating the room space, with the air conditioning unit arranging an air conditioning flow path for an indoor unit installed in the room space in the underfloor space formed between the floor surface of the room structure made of concrete and a floor material placed at a distance above the floor, and the ventilation unit being placed in the attic space formed between the ceiling surface of the room structure made of concrete and a ceiling material placed at a distance above the ceiling.

[0004] On the other hand, Patent Document 2 describes a whole-building air conditioning system that does not require duct construction or maintenance and can simplify the configuration of the air conditioning system. This whole-building air conditioning system includes an air-conditioned room provided in a non-residential space on the second floor of a building, an air conditioner and a ventilator disposed in the air-conditioned room, an air inlet for the building and an air supply port for conditioned air to the building provided in part of the air-conditioned room, the air supply port for conditioned air communicating with the inter-story space within the building, and air outlets for supplying conditioned air to the building on the ceiling surface of the first floor and the floor surface of the second floor that form the inter-story space within the building, taking in air from inside the building and outside air into the air-conditioned room, and supplying the conditioned air, whose temperature has been adjusted by the air conditioner, into the building via the inter-story space. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2018-066490 [Patent Document 2] Japanese Patent Publication No. 2021-173473 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the air conditioning system described in Patent Document 1 is configured so that the ventilation device and the indoor unit are spaced apart vertically, and while sufficient living space can be secured by using the space between the indoor unit and the ceiling material as storage space, maintenance of the ventilation device must be performed in a location other than the machine room, which means that it cannot be said to be easy to maintain. On the other hand, the whole-building air conditioning system described in Patent Document 2 has such a configuration that the inter-floor space within the building becomes the supply flow path for the air-conditioned air, eliminating the need to install ducts for supplying the air-conditioned air within the building, which eliminates the need for duct construction and maintenance and simplifies the configuration of the air-conditioning system.However, since this system is mainly intended for two-story detached houses with inter-floor spaces, it is not intended for buildings such as apartment buildings that do not have inter-floor spaces.

[0007] SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a central air conditioning system that is easy to maintain and can air condition the entire building even if the building has a large floor area. [Means for solving the problem]

[0008] The whole-building air-conditioning system according to the present invention is a whole-building air-conditioning system that takes in air inside a building into an air-conditioning machine room, and supplies conditioned air conditioned by a ventilation device and an air conditioner to rooms in the building via an underfloor space, The air conditioning machine room is provided in a non-habitable room (excluding the attic space and the underfloor space) in the building; The underfloor space provided in the building; The ventilation device and the air conditioner are disposed in the air conditioning machine room; an intake port provided in a part of the air conditioning machine room for taking air from inside the building into the air conditioning machine room; an opening provided in a part of a floor surface of the air conditioning machine room so as to communicate with the underfloor space; a floor air outlet provided on a floor surface of a room in the building so as to communicate with the underfloor space and supplying the conditioned air into the building, the ventilation device is disposed in an upper portion of the air conditioning machine room, the air conditioner is disposed in a lower portion of the air conditioning machine room, The floor air outlets are provided in a plurality of rooms in the building, respectively.

[0009] With this configuration, air from inside the building is drawn into the air conditioning room through an intake port, where it is conditioned by the ventilation system and air conditioners to have its temperature and humidity adjusted to produce high-quality conditioned air. The conditioned air is then sent out into the underfloor space through openings in the floor of the air conditioning room. The conditioned air is then supplied to the rooms through floor outlets installed in the floors of multiple rooms. The air in the rooms then travels through common areas such as corridors and halls, and returns to the air conditioning room together with the air remaining in the common areas.

[0010] Furthermore, it is desirable that the whole-building air-conditioning system be configured such that a device having air quality improving means is disposed between the ventilation device and the air conditioner.

[0011] Here, the air conditioner is a floor-standing type having an air-conditioning air outlet at the bottom, It is desirable that the air conditioner be configured so that its conditioned air outlet is exposed to the underfloor space through the opening.

[0012] Furthermore, it is desirable that the central air conditioning system be configured to include a bypass means for supplying air from within the building to the underfloor space without passing through the air conditioner.

[0013] It is desirable that the air conditioning machine room be located approximately in the center of the floor plan of the building, or be located facing the outer wall of the building. [Effects of the Invention]

[0014] The central air conditioning system according to the present invention has the following configuration: (1-1) The air inside the building is supplied from the air conditioning machine room through the underfloor space into the living rooms, and then returns to the air conditioning machine room via the common area, creating a circulating air flow. This means that the living rooms are constantly supplied with high-quality conditioned air from the floor outlets installed on the floor, and the air that has been in the rooms (polluted air) flows through the common area to the air conditioning machine room, where it is exhausted to the outside by the ventilation system, and fresh outside air is taken in to the air conditioning machine room. This improves the air quality inside the building and keeps residents comfortable at all times. (1-2) Furthermore, because the conditioned air is blown from the opening toward the underfloor space, a constant flow of conditioned air can be created that moves from the underfloor space to the living space, common areas, and the air conditioning machine room. Therefore, the floor outlets ensure that high-quality conditioned air is evenly distributed throughout the living space, and the air (contaminated air) that has been in the living space can be reliably guided to the air conditioning machine room via the common areas. In addition, because the air in the conditioned room flows simply from the top (ventilation device side) to the bottom (opening side), the flow within the conditioned room does not become complicated, and pressure loss does not increase. (1-3) Furthermore, since the underfloor space is used to supply conditioned air to rooms, etc., the duct construction that is normally required is no longer necessary, improving workability.

[0015] (2) Furthermore, by using a device with air quality improvement means, it is possible to supply conditioned air with improved air quality, such as sterilization, humidification, deodorization, or air purification, into the living space, thereby maintaining greater comfort for residents. Furthermore, depending on the residents' preferences, any of the air quality improvement means can be selected or combined and installed in the air conditioning machine room.

[0016] In addition, by using floor-standing air conditioners, (3-1) The conditioned air from the air conditioner is supplied directly to the underfloor space, reducing heat loss of the conditioned air. (3-2) Furthermore, since there will be more space in the machine room, part of the room can be used for storage, making it possible to make effective use of the air conditioning machine room, and by installing air quality improvement measures, the functionality and performance of the whole-building air conditioning system can be improved.

[0017] (4) Furthermore, by providing a bypass means, the bypass means allows indoor air (return air) to be mixed with conditioned air in the underfloor space without going through the air conditioner, and the conditioned air after mixing is dehumidified. Therefore, during humid summer weather, discomfort can be alleviated by performing dehumidification operation using the bypass means.

[0018] (5) Furthermore, by locating the air conditioning machine room in the approximate center, conditioned air is evenly supplied to each living space around the air conditioning machine room via the underfloor space. In addition, the conditioned air supplied to each living space is also evenly supplied to common areas such as corridors and halls through vents such as undercuts under doors, so the common areas also have a conditioned environment in terms of temperature and humidity, preventing heat shock for residents in the common areas.

[0019] (6) Alternatively, by locating the air conditioning machine room facing the exterior wall, it becomes possible to access the air conditioning machine room from outside, for example, from the common corridor or hall of an apartment building. This allows maintenance personnel to perform maintenance on ventilation systems and air conditioners even when the residents are not present, thereby improving convenience. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a partially omitted vertical cross-sectional view showing an embodiment of a central air-conditioning system of the present invention. [Figure 2] FIG. 4 is a partially omitted horizontal cross-sectional view showing another embodiment of the central air-conditioning system of the present invention. [Figure 3]1(i) is a partially omitted vertical cross-sectional view showing the configuration of an air conditioning machine room of a central air-conditioning system according to the present invention, and FIG. 1(ii) is a partially omitted CC cross-sectional view of FIG. 1(i). [Figure 4] 3(i) is a cross-sectional view taken along line AA of FIG. 3(i), and FIG. 3(ii) is a cross-sectional view taken along line BB of FIG. 3(i). [Figure 5] FIG. 1(i) is a partially omitted vertical cross-sectional view showing another configuration of the inside of an air conditioning machine room of a central air-conditioning system according to the present invention, and FIG. 1(ii) is a partially omitted FF cross-sectional view of FIG. 1(i). [Figure 6] 5(i) is a partially omitted DD cross-sectional view of FIG. 5(i), and FIG. 5(ii) is a partially omitted EE cross-sectional view. DETAILED DESCRIPTION OF THE INVENTION

[0021] The following describes in detail an embodiment of the present invention, but the following description of the components is one example (typical example) of the embodiment of the present invention, and the present invention is not limited to the following content unless the gist of the present invention is changed. Furthermore, components having the same functions are denoted by the same reference numerals in the drawings, and detailed description thereof will be omitted.

[0022] [Whole building air conditioning system] First, central air-conditioning systems 100, 101, and 102 according to embodiments of the central air-conditioning system of the present invention will be described with reference to FIGS. The whole-building air conditioning system 100-102 of this embodiment is installed in one room of an apartment building or other multi-family dwelling, and takes in air from inside the building and air from outside the building (outside air) into the air conditioning machine room 10, and supplies the conditioned air SA conditioned by a heat exchange type ventilation device 11 (hereinafter simply referred to as "ventilation device 11") and an air conditioner 13 to rooms and the like within the building via the underfloor space 20.

[0023] The air inside the building includes not only the air residing in rooms 60 inside the building, but also the air residing in common areas such as corridors 71. In this explanation, the air residing inside the building and being collected (return air) may be referred to as return air RA.

[0024] A building in which a central air conditioning system 100 or the like is installed has an attic space 40 and an underfloor space 20 (see FIG. 1). The underfloor space 20 has an airtight and insulated structure, and although the specific configuration of the airtight and insulated structure is not limited, any means can be used, such as foam board, spray foam, or glass wool.

[0025] The building also includes living rooms 60, which are the living spaces of the residents, as well as non-living rooms such as a corridor 71, a toilet 72, a bathroom 73, and a washroom 74 (see Figures 1 and 2). Naturally, living spaces such as a living / dining room 61 and a kitchen 62 where residents stay are also included in the living rooms.

[0026] The air conditioning machine room 10 is a room in which the ventilation device 11, the air conditioner 13, etc. are placed, and is provided in a non-habitable room in the building (excluding the attic space 40 and the underfloor space 20). The location (floor plan) where the air conditioning machine room 10 is installed can be designed arbitrarily, and in this embodiment, the air conditioning machine room 10 of the central air conditioning system 101 is installed between the living room 60 and the bathroom 73 (approximately in the center of the building) (see FIG. 2(i)). On the other hand, the air conditioning machine room 10 of the central air conditioning system 102 is installed so as to face the outer wall 91 of the building (see FIG. 2(ii)).

[0027] By arranging the air conditioning machine room 10 facing the exterior wall 91, as in the whole-building air conditioning system 102, it becomes possible to access the air conditioning machine room 10 from outside, for example, from a common corridor or hall of an apartment building. Therefore, even when the residents are not present, a maintenance company can perform maintenance on the ventilation devices 11 and air conditioners 13 located in the air conditioning machine room 10, improving convenience.

[0028] An intake port for taking air from inside the building into the air conditioning machine room is provided in a part of the air conditioning machine room 10. In this embodiment, a louver 33 is provided on the wall surface of the air conditioning machine room 10 as the intake port (see FIG. 1), but the intake port is not limited to this.

[0029] Furthermore, an opening 34 is provided in a part of the air conditioning machine room 10 so as to communicate with the underfloor space 20. The opening 34 is provided in a part of the air conditioning machine room 10 in order to supply a part of the conditioned air SA generated by the air conditioner 13 and the return air RA taken into the air conditioning machine room 10 to the underfloor space 20, and the air conditioner 13 and the bypass fan 14 are installed in the opening 34 (see FIG. 1). In this embodiment, a plurality of openings 34 are provided in the floor surface of the air conditioning machine room 10, but the present invention is not limited to this.

[0030] Meanwhile, a floor air outlet 35 is provided on the floor surface of a room 60 or the like in the building so as to communicate with the underfloor space 20. The floor air outlet 35 is for blowing out the conditioned air SA supplied via the underfloor space 20 into the room 60 or the like.

[0031] In this embodiment, a floor air outlet 35 is provided in each of a plurality of living rooms 60, etc. within a building. For example, in a description based on a whole-building air-conditioning system 101 (see FIG. 2(i)), three or four floor air outlets 35 are provided in each living room 60. Six floor air outlets 35 are provided in the living / dining room 61, and three floor air outlets 35 are provided in the kitchen 62. Of course, the number and installation locations of the floor air outlets 35 can be designed appropriately depending on the size of the living room 60, etc. This allows conditioned air SA to be blown evenly from all floor air outlets 35 provided on the floor surface to every corner of the space, such as the living room 60.

[0032] Furthermore, a fan 21 is provided in the floor air outlet 35 (see FIG. 1), and the occupant can use the fan 21 to adjust the amount of conditioned air SA supplied as desired according to the occupant's preferences, physical condition, and the like.

[0033] [Configuration of the air conditioning machine room] The air conditioning machine room 10 is equipped with a ventilation device 11, air quality improvement means 12, and an air conditioner 13. In this embodiment, the ventilation device 11 is disposed in the upper part of the air conditioning machine room 10, and the air conditioner 13 is disposed in the lower part of the air conditioning machine room 10 (see FIG. 1). Note that the air conditioner 13 in this embodiment is a floor-standing type having a conditioned air outlet at the bottom, and is installed on the floor of the air conditioning machine room 10 so that the conditioned air outlet is exposed in the underfloor space 20.

[0034] Meanwhile, the ventilation device 11 is a device that supplies outside air into the building and exhausts the air inside the building to the outdoors through ducts, grilles, etc. In this embodiment, outside air OA is supplied to the ventilation device 11 from an air intake port 31 installed outdoors through an air supply duct 41 piped to the attic space 40 (see FIGS. 1, 3(ii), and 5(ii)). The ventilation device 11 then exchanges heat between the fresh outside air OA taken in from outdoors and the return air RA taken into the air conditioning machine room 10, and supplies the fresh outside air SA' to the air conditioner 13. The return air RA is taken into the air conditioning machine room 10 through a louver 33 via a door, undercut 36, door louver 37, etc. installed in each room 60, etc. (see FIG. 1). The ventilation device 11 also takes in the return air RA and exhausts it to the outdoors from an exhaust port 32 installed outdoors through an exhaust duct 42 piped to the attic space 40.

[0035] Furthermore, in this embodiment, an optional space S is provided between the ventilation device 11 and the air conditioner 13, and an air quality improvement means 12 (air quality improvement device 12) is disposed therein. Therefore, the supply air SA' that has been heat exchanged by the ventilation device 11 and a portion of the return air RA that has been taken into the air conditioning machine room 10 are subjected to sterilization, humidification, deodorization, air purification, or the like by the air quality improvement device 12, thereby further improving the air quality.

[0036] A specific example of the sterilization means is one that uses deep ultraviolet light. On the other hand, specific examples of the air purification means are an electrostatic precipitator 15 and a HEPA filter 16, which will be described later (see Figures 3 and 5). Note that the air quality improvement means 12 is not limited to the examples shown above, and various technologies can be adopted.

[0037] The air whose quality has been improved by the air quality improvement device 12 has its temperature and humidity adjusted by the air conditioner 13, and is supplied to the underfloor space 20 as conditioned air SA (see FIG. 1). The configuration inside the air conditioning machine room 10 of the central air conditioning systems 101 to 102 is the same as that of the central air conditioning system 100.

[0038] In addition, the whole-building air conditioning systems 100-102 may be configured so that the air quality improvement means 12 is not placed in the air conditioning machine room 10, and the configuration within the air conditioning machine room 10 can be freely redesigned to suit the preferences of the occupants as well as their family composition (infants, elderly people), whether they have pets, and whether or not they have underlying diseases (asthma), as in the air conditioning machine rooms 10A and 10B described below (see Figures 3 and 5).

[0039] [Bypassing means] In this embodiment, a bypass fan 14 is installed in an opening 34 provided in the floor surface of the air conditioning machine room 10. Therefore, a portion of the return air RA that has flowed to the bottom of the air conditioning machine room 10 via the air quality improvement device 12 is supplied directly to the underfloor space 20 by the bypass fan 14 without passing through the air conditioner 13, and is mixed with the conditioned air SA in the underfloor space 20.

[0040] The bypass means formed by such bypass fan 14 allows the return air RA to be mixed with the conditioned air SA in the underfloor space 20 without passing through the air conditioner 13 or the like, so that the mixed conditioned air SA is dehumidified and can be supplied to the living room 60 or the like from the floor air outlet 35. Therefore, by performing dehumidification operation using the bypass means during humid summer months, for example, it is possible to reduce discomfort felt by residents staying in the living room 60 or the like.

[0041] [Air flow inside the building] The central air conditioning systems 100 to 102 are configured in this way to create airflow within the building. Specifically, the air inside the building (return air RA) is taken into the air conditioning machine room 10 through the louver 33, and then the temperature and humidity are adjusted by the ventilation device 11 and the air conditioner 13 to become conditioned air SA with good air quality, which is then supplied to the underfloor space 20 through the opening 34 (see Figure 1).

[0042] The conditioned air SA is then supplied to the living rooms 60, etc. from floor air outlets 35 provided on the floor surface of each living room 60, etc. (see Figures 1 and 2). Note that, as the conditioned air SA is supplied, the air inside the living rooms 60, etc. passes through the undercut 36, door louver 37, etc. (see Figure 1), common areas such as the corridor 71, and returns to the air conditioning machine room 10 together with the air remaining in the common areas (see the wavy line in Figure 2).

[0043] In this way, in a building where whole-building air conditioning systems 100-102 are installed, return air RA becomes conditioned air SA from the air conditioning machine room 10 and is supplied to rooms 60, etc. via the underfloor space 20, and then returns to the air conditioning machine room 10 via the common area, creating a circulating air flow.

[0044] Furthermore, living rooms 60 and the like are constantly supplied with high-quality conditioned air SA from floor outlets 35 installed in the floor, and the air (polluted air) that has been in living rooms 60 and the like flows through the common area to the air conditioning machine room 10 and is discharged outdoors by the ventilation system 11, while fresh outside air OA is taken into the air conditioning machine room 10 through the air intake 31 and air supply duct 41, where it becomes conditioned air SA whose temperature and humidity have been adjusted by the ventilation system 11 and air conditioner 13, and is circulated through the underfloor space 20 to be supplied again to living rooms 60 and the like. Thus, the air quality inside the building is constantly improved, and the comfort of the residents is always maintained.

[0045] Furthermore, because the conditioned air SA is blown by the air conditioner 13 from the opening 34 toward the underfloor space 20 (see FIG. 1), a constant flow of conditioned air SA can be generated that moves from the underfloor space 20 to the living rooms 60 and the like, the common areas, and then to the air conditioning machine room 10. Therefore, the floor air outlets 35 allow good quality conditioned air SA to be evenly supplied throughout the spaces such as the living rooms 60, and the air (polluted air) that has been staying in the living rooms 60 and the like can be reliably guided to the air conditioning machine room 10 via the common areas (see FIG. 2).

[0046] The fan 21 provided in the floor air outlet 35 can draw in the conditioned air SA from the underfloor space 20 and blow it out evenly from the floor air outlet 35. In addition, as mentioned above, the resident can adjust the supply amount of the conditioned air SA as desired using the fan 21, so that the supply amount can be adjusted for each floor air outlet 35, and the environment of the living room 60, etc. can be set for each room according to the resident's preferences.

[0047] Other non-residential rooms such as the toilet 72, bathroom 73, and washroom 74 are typically provided with individual ventilation devices 75, as in the case of the central air-conditioning systems 101 and 102 (see Figure 2). The return air RA flowing from each room 60 to the common area is in a condition where the temperature and humidity have been conditioned, and some of this conditioned return air RA from the toilet 72, bathroom 73, and washroom 74 is also exhausted to the outdoors by the ventilation devices 75. As a result, these spaces also become environments where the temperature and humidity are conditioned, preventing heat shock for residents.

[0048] [Another configuration of the air conditioning machine room] Next, with further reference to Figs. 3 to 6, another configuration of the air conditioning machine room of the central air conditioning system according to this embodiment will be described.

[0049] In the air conditioning machine room 10A, similar to the air conditioning machine room 10 (see FIG. 1), the ventilation device 11 is disposed in the upper part of the air conditioning machine room 10A, and the air conditioner 13 is disposed in the lower part of the air conditioning machine room 10A (see FIG. 3). An electrostatic precipitator 15 is disposed in the optional space S as an air quality improvement means. Therefore, the conditioned air SA from the ventilation device 11 is taken in by the electrostatic precipitator 15, and then fine particles and dust in the air are removed before being supplied to the air conditioner 13 and air-conditioned, thereby further improving the air quality of the conditioned air SA supplied to the living room 60, etc.

[0050] The floor surface of the air conditioning machine room 10A is provided with a plurality of openings 34, an air conditioner 13, and a bypass fan 14. Therefore, while the conditioned air SA is supplied to the underfloor space 20 by the air conditioner 13, by operating the bypass fan 14, the return air RA that has been treated by the electrostatic precipitator 15 without passing through the ventilation device 11 is mixed with the conditioned air SA in the underfloor space 20 without passing through the air conditioner 13, thereby achieving dehumidification operation.

[0051] The air conditioning machine room 10A is provided with a door 50 through which workers enter and exit the room, and the door 50 is provided with a louver 33 (see FIG. 3(i)). Air from inside the building (return air RA) flows into the air conditioning machine room 10A through the louver 33 and is taken into the ventilation device 11, and because a guide 18 is provided below the ventilation device 11 (see FIGS. 3(i) and 4(i)), the return air RA from the louver 33 can be reliably guided to the intake port 111 of the ventilation device 11 (see FIG. 3(ii)).

[0052] Meanwhile, in the air conditioning machine room 10B, similar to the air conditioning machine rooms 10 and 10A (see FIGS. 1 and 3), the ventilation device 11 is disposed in the upper part of the air conditioning machine room 10A, and the air conditioner 13 is disposed in the lower part of the air conditioning machine room 10A (see FIG. 5). A HEPA filter 16 is disposed in the optional space S as an air quality improvement device. The HEPA filter 16 captures pollen, house dust, pet hair, bacteria, viruses, and other contaminants contained in the conditioned air SA, thereby further improving the air quality of the conditioned air SA supplied to rooms 60 and the like. Because the HEPA filter 16 has a high pressure loss, a separate HEPA filter fan 17 is disposed in the optional space S to smoothly flow the conditioned air SA to the air conditioner 13 and bypass fan 14.

[0053] Of course, the configurations of the air conditioning machine rooms 10A, 10B shown in FIGS. 3 to 6 are merely examples, and the number of openings 34 and the like, their positions, etc. can be designed as desired.

[0054] Furthermore, the whole-building air conditioning system described above is an example of a whole-building air conditioning system according to the present invention, and the configuration of the present invention is not limited to the example shown, as long as it does not deviate from the spirit of the present invention. For example, the air quality improvement process 12 is not limited to the example given in this description, and it is also possible to arrange multiple devices each having a sterilization means, a humidification means, etc., or to arrange a single device having multiple air quality improvement means. [Industrial Applicability]

[0055] The central air conditioning system according to the present invention can be widely used in industrial fields such as the building and construction industries as an air conditioning system for various buildings such as condominiums and detached houses, and is therefore industrially useful. [Explanation of symbols]

[0056] 10,10A,10B Air conditioning machine room 11 Ventilation equipment 111 Ventilation intake 12 Air quality improvement equipment 13 Air conditioner 14 Bypass fan 15 Electrostatic Precipitator 16 HEPA filters 17 HEPA filter fan 18 Guide 20 Underfloor space 21 Fan 31 Air intake 32 Exhaust port 33 Louver (intake port) 34 Aperture 35 Floor outlet 36 Undercut 37 Door Louver 40 Attic space 41 Air supply duct 42 Exhaust duct 50 Doors 60 Room 61 Living room (dining room) 62 Living room (kitchen) 71 Hallway 72 Toilet 73 Bath 74 Washroom 75 Ventilation equipment for non-occupied rooms 81 Entrance 82 Balcony 91 Exterior Wall 92 Floor 100, 101, 102 Whole building air conditioning system S Optional space SA´ Air supply SA Air Conditioning RA return air OA Outside air EA Exhaust

Claims

1. A whole-building air-conditioning system that takes in air from inside a building into an air-conditioning machine room, and supplies conditioned air conditioned by a ventilation device and an air conditioner to rooms in the building via an underfloor space, The air conditioning machine room is provided in a non-habitable room (excluding the attic space and the underfloor space) in the building; The underfloor space provided in the building; The ventilation device and the air conditioner are disposed in the air conditioning machine room; an intake port provided in a part of the air conditioning machine room for taking air from inside the building into the air conditioning machine room; an opening provided in a part of a floor surface of the air conditioning machine room so as to communicate with the underfloor space; a floor air outlet provided on a floor surface of a room in the building so as to communicate with the underfloor space and supplying the conditioned air into the building, the ventilation device is disposed in an upper portion of the air conditioning machine room, the air conditioner is disposed in a lower portion of the air conditioning machine room, The floor air outlet is provided in each of a plurality of rooms in the building, in a central air conditioning system.

2. 2. The central air-conditioning system according to claim 1, further comprising a device having air quality improving means disposed between the ventilation device and the air conditioner.

3. The air conditioner is a floor-standing type having an air-conditioning air outlet at its bottom, The central air-conditioning system according to claim 2, wherein the air conditioner is installed so that a conditioned air outlet is exposed in the underfloor space through the opening.

4. 2. The central air-conditioning system according to claim 1, further comprising a bypass means for supplying the air inside the building to the underfloor space without passing through the air conditioner.

5. The central air-conditioning system according to any one of claims 1 to 4, wherein the air-conditioning machine room is located approximately in the center of the floor plan of the building.

6. The central air-conditioning system according to any one of claims 1 to 4, wherein the air-conditioning machine room is provided facing an outer wall of the building.

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