Building and HVAC systems

Abstract

To provide a building that can prevent condensation from occurring in an inter-floor part.SOLUTION: A building 1 comprises an inter-floor part 4 that is a space partitioned between a floor portion 6 of an upper floor 2 and a ceiling portion 13 of a lower floor 3. The building 1 includes an air conditioner 21 for supplying dehumidified and air-conditioned air A3 to a space of at least one of the upper floor 2 and the lower floor 3, and a first fan F1 for directly or indirectly supplying a portion of the air-conditioned air A3 to the inter-floor part.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a building and an air conditioning system.

Background Art

[0002] Generally, in a building such as a house, an intermediate space partitioned between the ceiling of the first floor and the floor of the second floor is provided (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, when cold air conditioned by, for example, an air conditioner is supplied to at least one of the first floor or the second floor, the temperature of the intermediate space adjacent to these also decreases. When air with high humidity enters such an intermediate space, there is a problem that condensation occurs in the intermediate space.

[0005] The present invention has been devised in view of the above actual situation, and the main object thereof is to provide a building capable of preventing the occurrence of condensation in the intermediate space.

Means for Solving the Problems

[0006] The present invention is a building having an intermediate space partitioned between an upper floor floor portion and a lower floor ceiling portion, wherein an air conditioner for supplying dehumidified conditioned air is provided in at least one of the upper floor and the lower floor spaces, and a first fan for supplying a part of the conditioned air directly or indirectly to the intermediate space.

Effects of the Invention

[0007] By adopting the above configuration, the building of the present invention can prevent condensation from occurring between floors. [Brief explanation of the drawing]

[0008] [Figure 1] This is a conceptual diagram showing the building of this embodiment. [Figure 2] This is a close-up view of the upper floor. [Figure 3] This is a block diagram of the control device of this embodiment. [Modes for carrying out the invention]

[0009] Embodiments of the present invention will be described below with reference to the drawings. It should be understood that the drawings contain exaggerations and representations that differ from the actual dimensional ratios of the structures in order to aid in understanding the content of the invention. Furthermore, the same or common elements are denoted by the same reference numerals throughout each embodiment, and redundant explanations are omitted. Moreover, the specific configurations shown in the embodiments and drawings are for the purpose of understanding the content of the present invention, and the present invention is not limited to the specific configurations shown in the drawings.

[0010] [building] Figure 1 is a conceptual diagram showing building 1 of this embodiment. Figure 2 is a partially enlarged view of the upper floor 2. As shown in Figure 1, building 1 is exemplified as a house 1A, but it may also be a building such as a commercial building. In this embodiment, a two-story building 1 is exemplified, but it may also be a building 1 with three or more stories. Building 1 of this embodiment has an inter-floor space 4, which is a space partitioned between the upper floor 2 and the lower floor 3.

[0011] [Upper floor and lower floor] The upper floor 2 and lower floor 3 are located in the space above the floor of building 1, 5. In this embodiment, if building 1 is two stories high, the upper floor 2 is the second floor and the lower floor 3 is the first floor. If building 1 is three stories or more, for example, the upper floor 2 may be the third floor and the lower floor 3 may be the second floor, or the upper floor 2 may be the fourth floor and the lower floor 3 may be the third floor.

[0012] In this embodiment, the upper floor 2 is partitioned by a floor portion 6, a ceiling portion 7, and an exterior wall portion 8. The upper floor 2 is provided with a plurality of living rooms 2a and a hall 2b. The hall 2b in this embodiment is adjacent to the plurality of living rooms 2a, and air can be exchanged between the hall 2b and the plurality of living rooms 2a. Air exchange is carried out, for example, through an undercut 10 formed in a door 9 that partitions the living rooms 2a and the hall 2b.

[0013] As shown in Figure 2, an opening 11 is formed in the floor portion 6 of the upper floor 2, which communicates with the inter-floor 4. The opening 11 in this embodiment includes a first opening 11a and a second opening 11b, but is not particularly limited. The first opening 11a and the second opening 11b are located below the chamber 22, which will be described later.

[0014] As shown in Figure 1, the lower floor 3 in this embodiment is divided by a floor portion 12, a ceiling portion 13, and an exterior wall portion 8. The lower floor 3 is provided with a plurality of living rooms 3a and a hall (not shown). The hall in this embodiment is adjacent to the plurality of living rooms 3a, and air can be exchanged between the hall and the plurality of living rooms 3a. Air exchange is carried out, for example, through an undercut (not shown) formed in a fixture (not shown) that separates the living rooms 3a and the hall. Below the floor portion 12 of the lower floor 3 (first floor), an underfloor space 15 is provided.

[0015] [Floor] The inter-floor space 4 is configured as a space partitioned between the floor portion 6 of the upper floor 2 and the ceiling portion 13 of the lower floor 3. In such an inter-floor space 4, for example, an air passage 27 (second air passage 27B) described later, cables, etc., may be placed.

[0016] [Underfloor space] The underfloor space 15 of this embodiment is configured as a space surrounded by the foundation 16, the dirt floor 17, and the floor portion 12 of the lower floor 3. An opening 18 is provided in the foundation 16. This opening 18 is used, for example, for taking in outside air A1 and ventilating the underfloor space 15. The outside air A1 taken in through the opening 18 is heat-exchanged with the geothermal heat with little temperature change throughout the year via the dirt floor 17. As a result, in the underfloor space 15, air (hereinafter sometimes simply referred to as "underfloor air") A2 that is cooler in summer and warmer in winter than the outside air A1 is stored.

[0017] [Air conditioning system] An air conditioning system 20 is provided in the building 1 of this embodiment. The air conditioning system 20 of this embodiment is configured to include an air conditioner 21.

[0018] [Air conditioner] The air conditioner 21 is for supplying dehumidified conditioned air A3 to at least one of the spaces on the upper floor 2 and the lower floor 3. In this embodiment, the dehumidified conditioned air A3 can be generated during the cooling operation and the dehumidifying operation of the air conditioner 21. In the air conditioner 21 of this embodiment, in addition to the dehumidifying operation and the cooling operation, a heating operation or the like is possible, but it is not particularly limited as long as it can supply the dehumidified conditioned air A3.

[0019] The air conditioner 21 of this embodiment is configured, for example, by a general household separate-type air conditioner. For this reason, the air conditioner 21 includes, as a set, an indoor unit 21a (shown in FIG. 2) and an outdoor unit (not shown) arranged outside the building 1.

[0020] The indoor unit 21a (shown in FIG. 2) of this embodiment is arranged on the upper floor 2. Thereby, the indoor unit 21a is configured to supply the conditioned air A3 to the space on the upper floor 2 (in this example, the inside of the chamber 22 described later).

[0021] As shown in FIG. 2, the indoor unit 21a of the present embodiment is disposed within a chamber 22 arranged on the upper floor 2. The chamber 22 is formed in a box shape having a space (space) inside. Inside such a chamber 22, air-conditioned air A3 is supplied from the indoor unit 21a.

[0022] The chamber 22 of the present embodiment is disposed within a storage space 23 provided adjacent to the hall 2b on the upper floor 2. The storage space 23 and the hall 2b are partitioned by a partition wall 24. In this partition wall 24, a gap 25 is provided that allows air to flow between the hall 2b and the storage space 23. Further, in the chamber 22, a gap 26 is provided that allows air to flow between the storage space 23 and the chamber 22. These gaps 25 and 26 may be configured, for example, as louvers or by an undercut or the like.

[0023] As shown in FIG. 1, it is preferable that the air-conditioned air A3 is supplied to the spaces on both the upper floor 2 and the lower floor 3 by the second fan F2 and the air flow path 27. Thereby, the air conditioning system 20 can be configured as an all-hall air conditioning system that can air-condition the entire building 1 with a single air conditioner 21. In this specification, a "fan" is a machine for pumping air. Therefore, the fan is not particularly limited as long as it can pump air.

[0024] [Second Fan] The second fan F2 is for supplying (pumping) the air-conditioned air A3 generated by the air conditioner 21 to the spaces on both the upper floor 2 and the lower floor 3. The second fan F2 of the present embodiment is disposed within the chamber 22.

[0025] The second fan F2 in this embodiment includes one second fan F2a and the other second fan F2b. The first second fan F2a is for sending (supplying) conditioned air A3 to the upper floor 2. The other second fan F2b is for sending (supplying) conditioned air A3 to the lower floor 3. The second fan F2 may consist of only one unit or three or more units.

[0026] [Airflow channel] The air passage 27 is for supplying conditioned air A3, generated by the air conditioner 21, to the spaces on both the upper floor 2 and the lower floor 3. This air passage 27 extends between the air conditioner 21 and several living rooms 2a and 3a.

[0027] The air passage 27 of this embodiment is composed of a first air passage 27A and a second air passage 27B. These first air passage 27A and second air passage 27B are composed of ducts, but are not particularly limited and may be composed of, for example, a space enclosed by a partition wall or the like (not shown).

[0028] In this embodiment, the first airflow path 27A extends between the air conditioner 21 and the living rooms 2a on the upper floor 2. One end of the first airflow path 27A is located within the chamber 22 where the air conditioner 21 is installed. One of the second fans F2a is connected to this end. The other end of the first airflow path 27A is connected to the multiple living rooms 2a, 2a on the upper floor 2. A branching section 28 is provided between the one end and the other end of the first airflow path 27A. Through this first airflow path 27A, the conditioned air A3, pressurized by one of the second fans F2a, can be supplied to each of the living rooms 2a, 2a on the upper floor 2 via the branching section 28.

[0029] A portion of the first air passage 27A in this embodiment is located inside the attic 29. This suppresses the exposure of the first air passage 27A on the upper floor 2.

[0030] In this embodiment, the second air passage 27B extends between the air conditioner 21 and the living rooms 3a on the lower floor 3. One end of the second air passage 27B is located within the chamber 22 where the air conditioner 21 is installed. The other end of the second fan F2b is connected to this end. The other end of the second air passage 27B is connected to a plurality of living rooms 3a, 3a on the lower floor 3. A branching section 30 is provided between the two ends of the second air passage 27B. Through this second air passage 27B, the conditioned air A3, pressurized by the other second fan F2b, can be supplied to each of the living rooms 3a, 3a on the lower floor 3 via the branching section 30.

[0031] In this embodiment, the second air passage 27B is located inside the chamber 22 and inside the floor gap 4. This allows for the exposure of the second air passage 27B to be suppressed in both the upper floor 2 and the lower floor 3. As shown in Figure 2, in this embodiment, the second air passage 27B is located inside the floor gap 4 through the first opening 11a, one of the first and second openings 11b provided below the chamber 22. This makes it possible to improve constructability while suppressing the exposure of the second air passage 27B.

[0032] [Third fan] As shown in Figure 1, the air conditioning system 20 of this embodiment includes a third fan F3 for supplying (pressurizing) outside air A1 into the building. The third fan F3 of this embodiment is connected to an outside air supply duct 31. One end of the outside air supply duct 31 is connected to the underfloor space 15. The other end of the outside air supply duct 31 is connected to the chamber 22. This outside air supply duct 31 makes it possible to connect the underfloor space 15 and the chamber 22.

[0033] In this embodiment, the operation of the third fan F3 creates negative pressure in the underfloor space 15, and outside air A1 is supplied to the underfloor space 15 from the opening 18. Furthermore, the outside air A1 (underfloor air A2) in the underfloor space 15 can be pumped to the chamber 22 via the third fan F3 and the outside air supply duct 31. In this way, the third fan F3 can supply outside air A1 to the inside of the building. The airflow of the third fan F3 is preferably set appropriately based on, for example, the number of ventilations required for the building 1.

[0034] In this embodiment, one end of the outside air supply duct 31 is connected to the underfloor space 15, but the embodiment is not limited to this configuration. One end of the outside air supply duct 31 may be connected to the outdoors, for example.

[0035] [Fourth Fan] The air conditioning system 20 of this embodiment includes a fourth fan F4 for exhausting the air A4 inside the building to the outside. The fourth fan F4 of this embodiment is installed on the outer wall portion 8 of the building 1, and the air A4 inside the building is exhausted (pressurized) to the outside.

[0036] [Control device] The air conditioning system 20 of this embodiment includes a control device 32. The control device 32 of this embodiment is configured as a computer and is located, for example, in a partition wall. Figure 3 is a block diagram of the control device 32 of this embodiment.

[0037] The control device 32 of this embodiment includes an arithmetic unit 33 consisting of a CPU (Central Processing Unit), a storage unit 34 in which control procedures are stored, and a working memory 35 for reading control procedures from the storage unit 34.

[0038] In this embodiment, the calculation unit 33 is connected to an air conditioner 21. This allows the operation of the air conditioner 21 (for example, set temperature, airflow, etc.) to be controlled. Furthermore, the calculation unit 33 is connected to a second fan F2 (in this example, one second fan F2a and the other second fan F2b), a third fan F3, and a fourth fan F4. This allows the operation of the second fan F2, the third fan F3, and the fourth fan F4 (for example, airflow, etc.) to be controlled.

[0039] The memory unit 34 stores procedures (programs) for controlling the operation of, for example, the air conditioner 21, the second fan F2, the third fan F3, and the fourth fan F4. These procedures are loaded into the working memory 35 and executed by the arithmetic unit 33.

[0040] [Function as a whole-building air conditioning system] Next, the operation of the air conditioning system 20, which is configured as a whole-building air conditioning system, will be explained. As shown in Figure 1, in the air conditioning system 20 of this embodiment, outside air A1 is supplied to the underfloor space 15 from the opening 18 by the operation of the third fan F3. Furthermore, the outside air A1 (underfloor air A2) in the underfloor space 15 can be pressurized and sent to the chamber 22 via the third fan F3 and the outside air supply duct 31.

[0041] Return air A5, which is air that has passed through at least one of the spaces of the upper floor 2 and the lower floor 3 (in this example, the space of the upper floor 2), is supplied to the chamber 22 through the gap 25 in the partition wall 24 and the gap 26 in the chamber 22, as shown in Figure 2.

[0042] The mixture of underfloor air A2 (outside air A1) and return air A5 is supplied to the intake of the air conditioner 21 (indoor unit 21a) and heat is exchanged. As a result, the conditioned air A3, from which the mixture has undergone heat exchange, is discharged into the chamber 22 from the discharge port of the air conditioner 21. In this embodiment, the conditioned air A3 is filtered by the filter 37.

[0043] As shown in Figure 1, the operation of the second fan F2 (one second fan F2a and the other second fan F2b) supplies conditioned air A3 to the spaces on the upper floor 2 and lower floor 3 (living rooms 2a and 3a) via the air passage 27 (first air passage 27A and second air passage 27B). A portion of the conditioned air A3 contains air that has been conditioned from the outside air A1. Therefore, both the spaces on the upper floor 2 and lower floor 3 (living rooms 2a and 3a) can be ventilated and air-conditioned.

[0044] A portion of the conditioned air A3 supplied to the spaces of the upper floor 2 and lower floor 3 is supplied as return air A5 to the hall 2b via multiple living rooms 2a. This return air A5 is then supplied into the storage space 23 through the gap 25 in the partition wall 24 shown in Figure 2. Furthermore, a portion of the return air A5 supplied into the storage space 23 is supplied into the chamber 22 through the gap 26 in the chamber 22 shown in Figure 2, and is then supplied to the intake port of the air conditioner 21 (indoor unit 21a).

[0045] The return air A5 is, for example, closer to the set temperature of the air conditioner 21 compared to the underfloor air A2 (outside air A1) before it is conditioned. When this return air A5 is heat-exchanged by the air conditioner 21, the increase in the heat load (latent heat of processing) can be suppressed.

[0046] As shown in Figure 1, the remaining conditioned air A3 supplied to the spaces of the upper floor 2 and lower floor 3 is exhausted outdoors via the fourth fan F4. This allows the air conditioning system (building 1) to ventilate and conditioned while circulating the conditioned air A3 to the upper floor 2 and lower floor 3.

[0047] Incidentally, when the air conditioner 21 is operating in cooling or dehumidifying mode, if cold conditioned air A3 is supplied to the upper floor 2 or lower floor 3, the temperature of the space between floors 4 also decreases via the floor portion 6 of the upper floor 2 or the ceiling portion 13 of the lower floor 3. If humid air (for example, outside air) enters this space between floors 4, condensation occurs, which is a problem.

[0048] [First fan] As shown in Figures 1 and 2, the air conditioning system 20 of this embodiment further includes a first fan F1. The first fan F1 is for supplying (pressurizing) a portion of the dehumidified conditioned air A3 to the floors 4, either directly or indirectly. As shown in Figure 3, the first fan F1 of this embodiment is connected to a calculation unit 33. This allows the operation of the first fan F1 (e.g., airflow) to be controlled.

[0049] As shown in Figure 2, the first fan F1 in this embodiment is connected to a duct 38. One end of the duct 38 in this embodiment is connected to a hole (not shown) that penetrates the storage space 23 and the chamber 22. The first fan F1 is connected to this end. The other end of the duct 38 is connected to the second opening 11b of the two openings 11a and 11a. This allows the duct 38 to connect the storage space 23 and the space between floors 4.

[0050] In this embodiment, the return air A5 supplied to the storage space 23 by the operation of the first fan F1 is supplied to the inter-floor space 4 via the duct 38. This return air A5 is the conditioned air A3 that has passed through at least one of the spaces of the upper floor 2 and the lower floor 3 shown in Figure 1. As a result, a portion of the dehumidified conditioned air A3 can be indirectly supplied to the inter-floor space 4 (in this example, via at least one of the spaces of the upper floor 2 and the lower floor 3).

[0051] Furthermore, one end of the duct 38 and the first fan F1 may be connected, for example, to the downstream side of the conditioned air A3 within the chamber 22. In this case, a portion of the dehumidified conditioned air A3 is supplied directly to the inter-floor 4 without passing through the upper floor 2 and lower floor 3. Note that even if the duct 38 is omitted and the first fan F1 is connected to the second opening 11b, a portion of the conditioned air A3 can still be supplied directly to the inter-floor 4 (in this example, without passing through the space of the upper floor 2 and lower floor 3).

[0052] Thus, in the air conditioning system 20 (building 1) of this embodiment, by operating the first fan F1, a portion of the conditioned air A3 dehumidified by the air conditioner 21 can be supplied directly or indirectly to the inter-floor space 4. As a result, even if, for example, highly humid air enters the inter-floor space 4 where the temperature has decreased, the humidity in the inter-floor space 4 can be reduced by the supply of dehumidified conditioned air A3. Therefore, condensation in the inter-floor space 4 can be suppressed.

[0053] In this embodiment, a portion of the dehumidified conditioned air A3 is indirectly supplied to the inter-floor space 4 (i.e., return air A5 is supplied). Therefore, compared to, for example, a case where a portion of the conditioned air A3 is directly supplied, the temperature in the inter-floor space 4 is prevented from dropping excessively. This allows for more reliable suppression of condensation in the inter-floor space 4.

[0054] In this embodiment, the air conditioning system 20 is configured as a whole-building air conditioning system capable of continuously air-conditioning the entire building 1. Therefore, compared to, for example, the case where air conditioners (not shown) are installed in each of the rooms 2a and 3a for individual air conditioning, dehumidified conditioned air A3 can be supplied stably. As a result, dehumidified conditioned air A3 (return air A5 in this example) is continuously supplied to the floors 4, so condensation in the floors 4 can be suppressed more reliably.

[0055] It is preferable that the floor space 4 is not equipped with an exhaust means for exhausting the air in the floor space 4 to the outside of the building. As a result, the floor space 4 is maintained at positive pressure by the dehumidified conditioned air A3 (return air A5 in this example), preventing the entry of humid air (not shown). This can more reliably suppress condensation in the floor space 4. The conditioned air A3 supplied to the floor space 4 can be discharged to the outside of the floor space 4 through gaps (not shown) formed in, for example, the floor portion 6 of the upper floor 2 that partitions the floor space 4, or the ceiling portion 13 of the lower floor 3.

[0056] Preferably, the airflow of the third fan F3 shown in Figure 1 is greater than the combined airflow of the first fan F1 and the fourth fan F4. This results in a larger supply of air to the building compared to the exhaust of air from inside the building, maintaining positive pressure inside the building. Consequently, it is possible to prevent high-humidity outside air from entering through gaps in the building 1 (not shown), and condensation between floors 4 can be more reliably suppressed.

[0057] Furthermore, by setting the airflow rate of the first fan F1 to be less than the difference between the airflow rates of the third fan F3 and the fourth fan F4, the amount of conditioned air A3 (return air A5 in this example) supplied to the inter-floor area 4, which is not subject to air conditioning, is suppressed. This can suppress an increase in air conditioning energy. In this embodiment, the airflow rates of the first fan F1, the third fan F3, and the fourth fan F4 are controlled by the control device 32 to maintain the above relationship, but they may also be controlled by residents or the like.

[0058] During cooling or dehumidifying operation of the air conditioner 21, the dehumidified cold conditioned air A3 (return air A5) tends to have a downward airflow towards the floor portion 6 of the upper floor 2 due to the pressure difference between the inside and outside. Since the opening 11 (second opening 11b) of this embodiment is formed in the floor portion 6 of the upper floor 2, the dehumidified conditioned air A3 (return air A5) directed towards the floor portion 6 of the upper floor 2 can be smoothly guided to the inter-floor 4. As a result, condensation in the inter-floor 4 can be suppressed more reliably.

[0059] The operation of the first fan F1 may be stopped during heating operation when dehumidified conditioned air A3 is not supplied, or when the air conditioner 21 is stopped. This prevents undehumidified air from being supplied to the space between floors 4, and can suppress condensation (winter condensation) in the space between floors 4. The stopping of the first fan F1 may be performed by the control device 32 based on, for example, the calendar function of the control device 32 or data from a temperature sensor, or it may be performed by an occupant or the like.

[0060] During heating operation of the air conditioner 21, the warm, undehumidified conditioned air A3 (return air A5) tends to create an upward airflow toward the ceiling portion 7 of the upper floor 2 due to the pressure difference between the inside and outside. Since the opening 11 (second opening 11b) of this embodiment is formed in the floor portion 6 of the upper floor 2, it is possible to prevent the undehumidified conditioned air A3 (return air A5) from being guided to the inter-floor 4. This makes it possible to more reliably suppress condensation (winter condensation) in the inter-floor 4.

[0061] Although particularly preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the illustrated embodiments and can be implemented in various modified forms.

[0062] [Note] The present invention includes the following embodiments.

[0063] [Invention 1] A building having an inter-floor space, which is a space partitioned between the floor portion of the upper floor and the ceiling portion of the lower floor, An air conditioner for supplying dehumidified conditioned air to at least one of the spaces on the upper floor and the lower floor, Includes a first fan for supplying a portion of the conditioned air directly or indirectly between the floors, building. [Invention 2] The building according to the present invention 1, further comprising a second fan and an airflow channel for supplying the conditioned air to both the upper and lower floor spaces. [Invention 3] The building according to the present invention, wherein the first fan is configured to supply return air, which is air that has passed through the space of at least one of the upper and lower floors, between the floors. [4th Invention] At least one of the upper and lower floors includes a plurality of living rooms and a hall adjacent to the plurality of living rooms, which allows for air circulation between them. The aforementioned air passage extends between the air conditioner and the plurality of rooms. The building according to the present invention, wherein the return air is supplied to the hall via the plurality of rooms. [5th ​​Invention] The air conditioner is configured to supply the conditioned air to the space on the upper floor. An opening is formed in the floor portion of the upper floor that communicates with the floors. The building according to the present invention 3 or 4, wherein the first fan supplies the return air from the upper floor to the floors through the opening. [Invention 6] The building according to any one of inventions 1 to 5, wherein the floors between the floors are not provided with an exhaust means for exhausting the air between the floors to the outside of the building. [7th Invention] A third fan to supply outside air into the building, It includes a fourth fan for exhausting the air inside the building to the outside, The building according to any one of inventions 1 to 6, wherein the airflow of the third fan is greater than the combined airflow of the first fan and the fourth fan. [8th Invention] An air conditioning system for a building having an inter-floor space, which is a space partitioned between the floor portion of the upper floor and the ceiling portion of the lower floor, An air conditioner for supplying dehumidified conditioned air to at least one of the spaces on the upper floor and the lower floor, Includes a first fan for supplying a portion of the conditioned air directly or indirectly between the floors, Air conditioning system. [Explanation of Symbols]

[0064] 1. Building 2 Upper floor 3 Lower floor 4th floor 21 Air conditioner F1's number one fan

Claims

1. A building having an inter-floor space, which is a space partitioned between the floor portion of the upper floor and the ceiling portion of the lower floor, An air conditioner for supplying dehumidified conditioned air to at least one of the spaces on the upper floor and the lower floor, A first fan for supplying a portion of the aforementioned conditioned air directly or indirectly between the floors, A third fan to supply outside air into the building, It includes a fourth fan for exhausting the air inside the building to the outside, The airflow of the third fan is greater than the combined airflow of the first and fourth fans. building.

2. The building according to claim 1, further comprising a second fan and an airflow path for supplying the conditioned air to both the upper and lower floor spaces.

3. The building according to claim 2, wherein the first fan is configured to supply return air between the floors, which is air that has passed through the space of at least one of the upper floor and the lower floor.

4. At least one of the upper and lower floors includes a plurality of living rooms and a hall adjacent to the plurality of living rooms, which allows for air circulation between them. The aforementioned air passage extends between the air conditioner and the plurality of rooms. The building according to claim 3, wherein the return air is supplied to the hall via the plurality of rooms.

5. The air conditioner is configured to supply the conditioned air to the space on the upper floor. An opening is formed in the floor portion of the upper floor that communicates with the floors. The building according to claim 3 or 4, wherein the first fan supplies the return air from the upper floor to the floors through the opening.

6. The building according to claim 1 or 2, wherein the floors between the floors are not provided with an exhaust means for exhausting the air between the floors to the outside of the building.

7. An air conditioning system for a building having an inter-floor space which is a space partitioned between the floor portion of an upper floor and the ceiling portion of a lower floor, An air conditioner for supplying dehumidified conditioned air to at least one of the spaces on the upper floor and the lower floor, A first fan for supplying a portion of the aforementioned conditioned air directly or indirectly between the floors, A third fan to supply outside air into the building, It includes a fourth fan for exhausting the air inside the building to the outside, The airflow of the third fan is greater than the combined airflow of the first and fourth fans. Air conditioning system.

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