Ventilation system, ventilation and air conditioning system, and exhaust port installation method

Abstract

To provide a ventilation system for a house having residence parts vertically.SOLUTION: An upstream side exhaust duct of a ventilation device 20 includes: a first chamber exhaust duct 411 extending from a first chamber R3 below a first residence part R1 to a third chamber R5; a second chamber exhaust duct 412 extending from a second chamber R4 above a second residence part R2 to the third chamber R5; a first indoor exhaust duct 413 connected to a first exhaust port part 71 provided on the floor board 143 of the second residence part; a second indoor exhaust duct 411 connected to a second exhaust port part 72 provided on the floor board 143 of the second residence part; and a body connection duct 415. A first blowout port part 81 and a second blowout port part 82 are provided on the ceiling board 141 of the first residence part and the floor board 143 of the second residence part, which constitute the third chamber. The floor board 119 of the first residence part includes a plurality of floor exhaust port parts 73 leading to the first chamber. The ceiling board 131 of the second residence part includes a ceiling exhaust port part 74 leading to the second chamber.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a ventilation system for a house having upper and lower living spaces, a ventilation air-conditioning system, and a method for installing an exhaust port. [Background technology]

[0002] Conventionally, ventilation equipment installed in the attic space has been used to ventilate houses 24 hours a day. This ventilation equipment uses a supply tube to deliver outside air from an intake port on the exterior wall to an air supply port on the ceiling. Air The unit is equipped with an intake duct, an exhaust duct for transporting indoor air from the exhaust port in the ceiling to the exhaust port in the exterior wall, and a main body portion provided midway between the intake duct and the exhaust duct and having a blower, a heat exchanger, etc.

[0003] When installing a ventilation system, if the structure of the house does not allow for ducts to be run within the attic space, the original ventilation plan may need to be modified, such as by supplying air to an alternative location instead of the piping intended to supply air to the desired location.

[0004] In order to reduce the use of such ducts, it is known to use part of the structure of a house for ventilation (Patent Documents 1 to 3).

[0005] Patent Document 1 discloses a ventilation system, in which a main body with a heat exchanger is housed between floors, and outside air is supplied between the floors, and the outside air is sent to the living space on the first floor through a plurality of openings formed in the ceiling of the first floor that constitutes the floors, and sent to the living space on the second floor through a plurality of openings formed in the floor of the second floor. Furthermore, exhaust ducts extend from the main body of the ventilation device to the space under the floor of the first floor and the space above the ceiling of the second floor, and blowers are attached to the ends of the exhaust ducts. When these blowers are operated, air flows into the exhaust duct in the space under the floor of the first floor and is exhausted to the outside through the main body, and in the space above the ceiling of the second floor, air flows into the exhaust duct and is exhausted to the outside through the main body. Moreover, air from the living space on the first floor flows into the space under the floor through an opening provided in the floor of the first floor, and air from the living space on the second floor flows into the space above the ceiling through an opening provided in the ceiling of the second floor.

[0006] Patent Document 2 discloses a central air conditioning system, in which the main body of the ventilation device and the air conditioner are housed between floors, outside air is supplied from the main body of the ventilation device to the air conditioner, and conditioned air is supplied from the air conditioner to the floors, and the air is sent to the living space on the first floor through multiple openings formed in the ceiling of the first floor that constitutes the floors, and is sent to the living space on the second floor through multiple openings formed in the floor of the second floor. Also, the air in the living space on the first floor is exhausted from an exhaust port provided in the ceiling of the first floor. Air The exhaust is then passed through the exhaust pipe and the main body of the ventilation system to the outdoors. Air The space under the floor is also vented to the outside, and air from the living space on the first floor flows into the space under the floor through an opening in the floor.

[0007] Patent Document 3 discloses a central air conditioning system, in which the main body of a ventilation device and an air conditioner are housed between floors, outside air is supplied from the main body of the ventilation device to the floors, conditioned air is supplied from the air conditioner to the floors, and the air is sent to the living space on the first floor through multiple openings formed in the ceiling of the first floor that constitutes the floors, and sent to the living space on the second floor through multiple openings formed in the floor of the second floor. Also, the air in the living space on the first floor is exhausted from an exhaust port provided in the ceiling of the first floor. AirThe air is exhausted to the outdoors through the outlet and the main body of the ventilation system. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] JP 2001-279837 A, paragraphs 0062 to 0069, FIG. 4 [Patent Document 2] JP 2021-38873 A, paragraphs 0075 to 0079, FIG. 6 [Patent Document 3] JP 2020-94724 A, paragraphs 0055 to 0062, FIG. 4 Summary of the Invention [Problem to be solved by the invention]

[0009] In the ventilation system of Patent Document 1, a fan installed at the end of the exhaust duct on the underfloor space side exhausts air from the first floor living area to the outdoors via the underfloor space and the exhaust duct, and a fan installed at the end of the exhaust duct on the attic side exhausts air from the second floor living area to the outdoors via the attic space and the exhaust duct. However, installing a fan at the end of the duct also requires wiring to power the fan, which could make installation work in the underfloor space and attic space complicated.

[0010] The central air conditioning system of Patent Document 2 requires the installation of the main body of the ventilation device and the air conditioner between floors, and the work of connecting them with ducts, which can make the installation work complicated. Between floors It is desirable to separate the ventilation system from the air conditioning system to ventilate the first floor and second floor living areas.

[0011] In the whole-building air-conditioning system of Patent Document 3, the main body of the ventilation device and the air conditioner are installed between floors without being connected by a duct, and air from the second floor is sent to the main body through an inlet port provided in the floor board and into the space between the floors (paragraph 0059 of Patent Document 3). However, this means that the outside air supplied to the space between the floors from the main body of the ventilation device mixes with the indoor air that enters the space between the floors through the inlet port. In addition, multiple outlets are provided in the ceiling board of the first floor and the floor board of the second floor between the main body of the ventilation device, which is installed between the floors toward the center of the building, and the inlet port provided in the floor board. Even if indoor air flows into the space between the floors from the inlet port, there is a risk that the indoor air that has entered the space between the floors will return to the living area through the outlet port before reaching the main body of the ventilation device. Furthermore, because the air between the floors enters the main body of the ventilation device and is exhausted to the outdoors, there is also a risk that the outside air supplied to the space between the floors from the main body of the ventilation device will be exhausted through a shortcut. Even if the intake port leading to the inter-floor space is installed on the ceiling of the first floor to draw in indoor air from the first floor instead of on the floorboard of the second floor, if the indoor air from the intake port is sent to the main body via the inter-floor space, the same problems as when it is installed on the floorboard of the second floor can be expected. In these cases, for example, the exhaust of indoor air and the supply of outside air cannot be performed properly for the first floor as the first living area and the second floor as the second living area above the first living area.

[0012] SUMMARY OF THE PRESENT DISCLOSURE In view of the above, an object of the present invention is to provide a ventilation system for a house having upper and lower living areas, and a method for installing the ventilation air-conditioning system and the exhaust port. [Means for solving the problem]

[0013] The present invention relates to a house comprising a first living portion, a second living portion provided above the first living portion, a first chamber provided below the first living portion, a second chamber provided above the second living portion, and a third chamber provided between the first living portion and the second living portion to form an inter-storey. (Excluding those in which the third chamber is equipped with an indoor unit of a room air conditioner.) A ventilation system for ventilating a room by a ventilation device, the ventilation device including a supply air passage through which outside air flows. Air and the exhaust through which indoor air flows. Airand a main body having an intake fan, an exhaust fan, and a heat exchanger, the heat exchanger performing heat exchange between the outside air and the indoor air, and the main body Air and the above exhaust Air The third chamber is provided in the middle of the pipe and accommodated therein. And A downstream end of the air supply duct is held within the third chamber. Before The outside air is blown into the intake air duct by the intake air blower. The above The main body is disposed in the intake duct. The above The exhaust pipe is provided at the downstream end of the exhaust pipe. Air The third chamber is provided in the middle of the pipe. Before The outside air is blown into the third chamber from the opening of the main body by the air supply blower, and the upstream exhaust duct upstream of the main body includes a first chamber exhaust duct extending from the inside of the first chamber to the inside of the third chamber, a second chamber exhaust duct extending from the inside of the second chamber to the inside of the third chamber, and a first exhaust port provided in a ceiling panel of the first living area or a floor panel of the second living area. (Excluding those equipped with a blower.) a first indoor exhaust duct provided inside the third chamber and connected to the first indoor exhaust duct; and a second exhaust port provided in the ceiling panel of the first living area or the floor panel of the second living area. (Excluding those equipped with the above-mentioned blower.) and a second indoor exhaust duct provided inside the third chamber and connected to the third chamber. The ceiling panel of the first living space has a plurality of first air outlets through which the outside air of the third chamber is blown into the first living space. (Excluding those equipped with the above-mentioned blower.) The floor plate of the second living area is provided with a plurality of second air outlet portions through which the outside air of the third chamber is blown into the second living area. (Excluding those equipped with the above-mentioned blower.) a floor plate of the first living area having a plurality of floor exhaust ports leading to the interior of the first chamber; (Excluding those equipped with the above-mentioned blower.) a ceiling panel of the second living area having a ceiling exhaust port portion communicating with the inside of the second chamber; (Excluding those equipped with the above-mentioned blower.) The exhaust fan exhausts the indoor air to the outdoors through the following routes K1, K2, K3, and K4. K1: A path that flows from the floor exhaust port through the first chamber, the first chamber exhaust duct, the main body, and the downstream exhaust duct. K2: A path from the ceiling exhaust port portion through the second chamber, the second chamber exhaust duct, the main body portion, and the downstream exhaust duct. K3: A path from the first exhaust port portion through the first indoor exhaust duct and the main body portion to the downstream exhaust duct. K4: A path from the second exhaust port portion through the second indoor exhaust duct and the main body portion to the downstream exhaust duct.

[0014] In the ventilation system of the present invention, the upstream exhaust duct is provided inside the third chamber with its downstream end connected to the main body, and further includes a main body connecting duct through which the indoor air from the first chamber exhaust duct, the indoor air from the second chamber exhaust duct, the indoor air from the first indoor exhaust duct, and the indoor air from the second indoor exhaust duct flow, the downstream end of the second chamber exhaust duct and the downstream end of the first indoor exhaust duct are connected to two inlet connections of a first pipe fitting of a two-input and one-output type, the outflow connection of the first pipe fitting and the downstream end of the second indoor exhaust duct are connected to two inlet connections of a second pipe fitting of a two-input and one-output type, the outflow connection of the second pipe fitting and the downstream end of the first chamber exhaust duct are connected to two inlet connections of a third pipe fitting of a two-input and one-output type, and the upstream end of the main body connecting duct is connected to the outflow connection of the third pipe fitting.

[0015] The present invention relates to a house comprising a first living portion, a second living portion provided above the first living portion, a first chamber provided below the first living portion, a second chamber provided above the second living portion, and a third chamber provided between the first living portion and the second living portion to form an inter-storey. (Excluding those in which the third chamber is equipped with an indoor unit of a room air conditioner.) A ventilation system for ventilating a room by a ventilation device, the ventilation device including a supply air passage through which outside air flows. Air and the exhaust through which indoor air flows. Airand a main body having an intake fan, an exhaust fan, and a heat exchanger, the heat exchanger performing heat exchange between the outside air and the indoor air, and the main body Air and the above exhaust Air The third chamber is provided in the middle of the pipe and accommodated therein. And A downstream end of the air supply duct is held within the third chamber. Before The outside air is blown into the intake air duct by the intake air blower. The above The main body is disposed in the intake duct. The above The exhaust pipe is provided at the downstream end of the exhaust pipe. Air The third chamber is provided in the middle of the pipe. Before The outside air is blown into the third chamber from the opening of the main body by the air supply blower, and the upstream exhaust duct upstream of the main body includes a first chamber exhaust duct extending from the inside of the first chamber to the inside of the third chamber, and a first exhaust port provided in a ceiling panel of the first living area or a floor panel of the second living area. (Excluding those equipped with a blower.) a first indoor exhaust duct provided inside the third chamber and connected to the first indoor exhaust duct; and a second exhaust port provided in the ceiling panel of the first living area or the floor panel of the second living area. (Excluding those equipped with the above-mentioned blower.) and a second indoor exhaust duct provided inside the third chamber and connected to the third chamber. The ceiling panel of the first living space has a plurality of first air outlets through which the outside air of the third chamber is blown into the first living space. (Excluding those equipped with the above-mentioned blower.) The floor plate of the second living area is provided with a plurality of second air outlet portions through which the outside air of the third chamber is blown into the second living area. (Excluding those equipped with the above-mentioned blower.) a floor plate of the first living area having a plurality of floor exhaust ports leading to the interior of the first chamber; (Excluding those equipped with the above-mentioned blower.) The second chamber is a non-exhaust chamber that is not used as a flow path for the indoor air, and the indoor air is exhausted to the outdoors via the following routes K1, K3, and K4 by the exhaust fan. K1: A path that flows from the floor exhaust port through the first chamber, the first chamber exhaust duct, the main body, and the downstream exhaust duct. K3: A path from the first exhaust port portion through the first indoor exhaust duct and the main body portion to the downstream exhaust duct. K4: A path from the second exhaust port portion through the second indoor exhaust duct and the main body portion to the downstream exhaust duct.

[0016] The present invention relates to a house comprising a first living portion, a second living portion provided above the first living portion, a first chamber provided below the first living portion, a second chamber provided above the second living portion, and a third chamber provided between the first living portion and the second living portion to form an inter-storey. (Excluding those in which the third chamber is equipped with an indoor unit of a room air conditioner.) A ventilation system for ventilating a room by a ventilation device, the ventilation device including a supply air passage through which outside air flows. Air and the exhaust through which indoor air flows. Air and a main body having an intake fan, an exhaust fan, and a heat exchanger, the heat exchanger performing heat exchange between the outside air and the indoor air, and the main body Air and the above exhaust Air The third chamber is provided in the middle of the pipe and accommodated therein. And A downstream end of the air supply duct is held within the third chamber. Before The outside air is blown into the intake air duct by the intake air blower. The above The main body is disposed in the intake duct. The above The exhaust pipe is provided at the downstream end of the exhaust pipe. Air The third chamber is provided in the middle of the pipe. Before The outside air is blown into the third chamber from the opening of the main body by the air supply blower, and the upstream exhaust duct upstream of the main body includes a second chamber exhaust duct extending from the inside of the second chamber to the inside of the third chamber, and a first exhaust port provided in a ceiling panel of the first living area or a floor panel of the second living area. (Excluding those equipped with a blower.) a first indoor exhaust duct provided inside the third chamber and connected to the first indoor exhaust duct; and a second exhaust port provided in the ceiling panel of the first living area or the floor panel of the second living area. (Excluding those equipped with the above-mentioned blower.)and a second indoor exhaust duct provided inside the third chamber and connected to the third chamber. The ceiling panel of the first living space has a plurality of first air outlets through which the outside air of the third chamber is blown into the first living space. (Excluding those equipped with a blower.) The floor plate of the second living area is provided with a plurality of second air outlet portions through which the outside air of the third chamber is blown into the second living area. (Excluding those equipped with the above-mentioned blower.) a ceiling panel of the second living area having a ceiling exhaust port portion communicating with the inside of the second chamber; (Excluding those equipped with the above-mentioned blower.) The first chamber is a non-exhaust chamber that is not utilized as a flow path for the indoor air, and the indoor air is exhausted to the outdoors via the following routes K2, K3, and K4 by the exhaust fan. K2: A path that flows from the ceiling exhaust port portion through the second chamber, the second chamber exhaust duct, the main body portion, and the downstream exhaust duct. K3: A path from the first exhaust port portion through the first indoor exhaust duct and the main body portion to the downstream exhaust duct. K4: A path from the second exhaust port portion through the second indoor exhaust duct and the main body portion to the downstream exhaust duct.

[0017] The present invention relates to a house comprising a first living portion, a second living portion provided above the first living portion, a first chamber provided below the first living portion, a second chamber provided above the second living portion, and a third chamber provided between the first living portion and the second living portion to form an inter-storey. (Excluding those in which the third chamber is equipped with an indoor unit of a room air conditioner.) A ventilation system for ventilating a room by a ventilation device, the ventilation device including a supply air passage through which outside air flows. Air and the exhaust through which indoor air flows. Air and a main body having an intake fan, an exhaust fan, and a heat exchanger, the heat exchanger performing heat exchange between the outside air and the indoor air, and the main body Air and the above exhaust Air The third chamber is provided in the middle of the pipe and accommodated therein. And A downstream end of the air supply duct is held within the third chamber. Before The outside air is blown into the intake air duct by the intake air blower. The aboveThe main body is disposed in the intake duct. The above The exhaust pipe is provided at the downstream end of the exhaust pipe. Air The third chamber is provided in the middle of the pipe. Before The outside air is blown into the third chamber from the opening of the main body by the air supply blower, and an upstream exhaust duct upstream of the main body is connected to a first exhaust port provided in a ceiling panel of the first living area or a floor panel of the second living area. (Excluding those equipped with a blower.) a first indoor exhaust duct provided inside the third chamber and connected to the first indoor exhaust duct; and a second exhaust port provided in the ceiling panel of the first living area or the floor panel of the second living area. (Excluding those equipped with the above-mentioned blower.) a second indoor exhaust duct provided inside the third chamber and connected to the third indoor exhaust duct; and a third exhaust port provided in the ceiling panel of the first living area or the floor panel of the second living area. (Excluding those equipped with the above-mentioned blower.) a third indoor exhaust duct provided inside the third chamber and connected to the third indoor exhaust duct; and a fourth exhaust port provided in the ceiling panel of the first living area or the floor panel of the second living area. (Excluding those equipped with the above-mentioned blower.) and a fourth indoor exhaust duct provided inside the third chamber and connected to the fourth indoor exhaust duct. The ceiling panel of the first living space has a plurality of first air outlets through which the outside air of the third chamber is blown into the first living space. (Excluding those equipped with the above-mentioned blower.) The floor plate of the second living area is provided with a plurality of second air outlet portions through which the outside air of the third chamber is blown into the second living area. (Excluding those equipped with the above-mentioned blower.) The first chamber and the second chamber are non-exhaust chambers that are not used as a flow path for the indoor air, and the indoor air is exhausted to the outdoors via the following routes K3, K4, K5, and K6 by the exhaust fan. K3: A path from the first exhaust port portion through the first indoor exhaust duct and the main body portion to the downstream exhaust duct. K4: A path from the second exhaust port portion through the second indoor exhaust duct and the main body portion to the downstream exhaust duct. K5: A path from the third exhaust port portion through the third indoor exhaust duct and the main body portion to the downstream exhaust duct. K6: A path from the fourth exhaust port portion through the fourth indoor exhaust duct and the main body portion to the downstream exhaust duct.

[0018] The present invention relates to a house comprising a first living portion, a second living portion provided above the first living portion, a first chamber provided below the first living portion, a second chamber provided above the second living portion, and a third chamber provided between the first living portion and the second living portion to form an inter-storey. (Excluding those in which the third chamber is equipped with an indoor unit of a room air conditioner.) A ventilation system for ventilating a room by a ventilation device, the ventilation device including a supply air passage through which outside air flows. Air and the exhaust through which indoor air flows. Air and a main body having an intake fan, an exhaust fan, and a heat exchanger, the heat exchanger performing heat exchange between the outside air and the indoor air, and the main body Air and the above exhaust Air The third chamber is provided in the middle of the pipe and accommodated therein. And A downstream end of the air supply duct is held within the third chamber. Before The outside air is blown into the intake air duct by the intake air blower. The above The main body is disposed in the intake duct. The above The exhaust pipe is provided at the downstream end of the exhaust pipe. Air The third chamber is provided in the middle of the pipe. Before the outside air is blown into the inside of the third chamber from an opening of the main body by the air supply blower, and the upstream exhaust duct upstream of the main body includes a first chamber exhaust duct extending from the inside of the first chamber to the inside of the third chamber, a second chamber exhaust duct extending from the inside of the second chamber to the inside of the third chamber, a two-input, one-output type pipe joint having a downstream end of the first chamber exhaust duct and a downstream end of the second chamber exhaust duct connected to two inflow connection parts, and a main body connection duct having an upstream end connected to the outflow connection part of the pipe joint and a downstream end connected to the main body, and a ceiling panel of the first living area includes a plurality of first air outlet parts through which the outside air of the third chamber is blown into the first living area. (Excluding those equipped with a blower.)a floor plate of the second living area, and a plurality of second air outlet portions through which the outside air of the third chamber is blown into the second living area; (Excluding those equipped with the above-mentioned blower.) a floor plate of the first living area having a plurality of floor exhaust ports leading to the interior of the first chamber; (Excluding those equipped with the above-mentioned blower.) a ceiling panel of the second living area having a ceiling exhaust port portion communicating with the inside of the second chamber; (Excluding those equipped with the above-mentioned blower.) The exhaust fan exhausts the indoor air to the outdoors via the following routes K1 and K2. K1: A path that flows from the floor exhaust port through the first chamber, the first chamber exhaust duct, the main body, and the downstream exhaust duct. K2: A path from the ceiling exhaust port portion through the second chamber, the second chamber exhaust duct, the main body portion, and the downstream exhaust duct.

[0019] The ventilation and air conditioning system of the present invention comprises the ventilation system and an indoor unit of a room air conditioner provided in the first living area, the indoor unit comprising an air conditioning blower that blows conditioned air, the indoor unit being further arranged below the first air outlet portion, and the indoor unit conditions the outside air that flows into the first living area from the first air outlet portion above the indoor unit, and blows the conditioned air into the first living area.

[0020] The ventilation and air conditioning system of the present invention comprises the ventilation system and an indoor unit of a room air conditioner provided in the second living area, the indoor unit comprising an air conditioning blower that blows conditioned air, the indoor unit being further arranged above the second air outlet portion, and the indoor unit conditions the outside air that flows into the second living area from the second air outlet portion below the indoor unit, and blows the conditioned air into the second living area.

[0021] The method for attaching an exhaust port unit of the present invention is a method for attaching the first exhaust port unit and the second exhaust port unit of the ventilation system to the ceiling board of the first living area or the floor board of the second living area that constitutes the third chamber, the method comprising a first attachment step of attaching the first exhaust port unit to a first selected space part based on a layout of the house, and a second attachment step of attaching the second exhaust port unit to a second selected space part based on the layout of the house, the first attachment step being a step of attaching the first selected space part to a first selected space part of the first living area or the floor board of the second living area. Any of the following: toilet, washroom, dressing room (excluding those that are used as washrooms), shoe closet, or entrance hall If so, the first exhaust port portion is First choice space Attached to the ceiling panel of or The first selected space portion is the second living space portion. Any of the toilet, washroom, and dressing room (excluding those shared with the washroom in the second living area) If so, the first exhaust port portion is First choice space and the second mounting step is to mount the second selected space portion to the first living area. Any of the toilet, the washroom, the dressing room, the shoe closet, and the entrance (excluding the first selected space portion). If so, the second exhaust port portion is Second selection space Attached to the ceiling panel of or The second selected space portion is the second living space portion. Any of the toilet, the washroom, and the dressing room (excluding the first selected space portion) If so, the second exhaust port portion is Second selection space The present invention is characterized in that it is attached to the floor panel. Effect of the Invention

[0022] According to the present invention, the ventilation device can be easily installed in a house having a first living space and a second living space, and further, the first living space and the second living space can be suitably ventilated. [Brief description of the drawings]

[0023] [Figure 1] 1 is a cross-sectional view of a house to which a ventilation system according to a first embodiment of the present invention is applied. [Diagram 2] FIG. 2 is a perspective view showing a ventilation device of the ventilation system of FIG. [Diagram 3] FIG. 3 is a diagram showing a main body of the ventilation device of FIG. 2. [Figure 4] FIG. 3 shows a pipe joint of the ventilation device of FIG. 2. [Diagram 5] 3 is a diagram for explaining the connection relationship of an upstream exhaust duct of the ventilation device of FIG. 2. FIG. [Figure 6] FIG. 2 is a plan view showing an example of the configuration of a living space on the first floor of the house in FIG. [Figure 7] FIG. 2 is a plan view showing an example of the configuration of the second floor living space of the house in FIG. [Figure 8] FIG. 2 is a plan view showing an example of the structure of the foundation of the house shown in FIG. [Figure 9] 13 is a diagram for explaining the connection relationship of an upstream exhaust duct of a ventilation device according to a modified example of the present invention. FIG. [Figure 10] 3 is a diagram showing a method for determining a living space section in which a first exhaust port section and a second exhaust port section of the ventilation device of FIG. 2 are to be provided. FIG. [Figure 11] FIG. 11 is a diagram showing a first determination step in FIG. 10 . [Figure 12] FIG. 12 is a diagram for explaining step A1 in FIG. 11. [Figure 13] FIG. 11 is a diagram showing a second determination step in FIG. 10 . [Figure 14] FIG. 14 is a diagram for explaining step B1 in FIG. 13. [Figure 15] FIG. 4 is a cross-sectional view of a house to which a ventilation system according to a second embodiment of the present invention is applied. [Figure 16] FIG. 11 is a cross-sectional view of a house to which a ventilation system according to a third embodiment of the present invention is applied. [Figure 17] FIG. 11 is a cross-sectional view of a house to which a ventilation system according to a fourth embodiment of the present invention is applied. [Figure 18] FIG. 13 is a cross-sectional view of a house to which a ventilation system according to a fifth embodiment of the present invention is applied. [Figure 19] FIG. 13 is a cross-sectional view of a house to which a ventilation system according to a modified example of the fifth embodiment of the present invention is applied. [Figure 20] FIG. 13 is a cross-sectional view of a house to which a ventilation system according to another modified example of the fifth embodiment of the present invention is applied. [Figure 21] FIG. 13 is a cross-sectional view of a house to which a ventilation air-conditioning system according to a sixth embodiment of the present invention is applied. [Figure 22] FIG. 13 is a diagram for explaining a ventilation device according to another modified example of the present invention. [Figure 23] FIG. 4 is a diagram for explaining an example of the arrangement of the main body and the house in FIG. 3. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] [First embodiment] First, a house 10 to which a ventilation system 1 according to a first embodiment of the present invention is applied will be described with reference to the drawings. As shown in FIG. 1, the house 10 is two stories tall, and further includes a first floor living area (hereinafter referred to as the first living area R1), a second floor living area (hereinafter referred to as the second living area R2) above the first living area R1, a first chamber R3 below the first living area R1, a second chamber R4 above the second living area R2, and a third chamber R5 between the first living area R1 and the second living area R2 to form an inter-floor space. The first living area R1, the second living area R2, the first chamber R3, the second chamber R4, and the third chamber R5 are configured to be highly airtight against the outdoors. Hereinafter, the first living area R1 may be referred to as the "first floor" and the second living area R2 as the "second floor."

[0025] The first chamber R3 is constructed using a part of the first living area R1 and is provided under the first living area R1. Specifically, the first chamber R3 is hollow and includes a base concrete 111 of the foundation 110, a rising portion 112, a foundation 115 supported by a foundation top 112A of the rising portion 112, and a floor plate 119 supported by a joist 117 and the upper surface of which is exposed to the living space of the first living area R1. A packing 120 is disposed between the foundation top 112A and the foundation 115.

[0026] The second chamber R4 is constructed using a part of the second living area R2 and is provided on the second living area R2. Specifically, the second chamber R4 is formed hollow and includes a ceiling board 131 whose lower surface is exposed to the living space of the second living area R2, a roof board 137 arranged above the ceiling board 131, a heat insulating material 133 provided inside the roof board 137, and a side part 134 provided inside an outer wall part 160 described later. An airtight sheet is stretched on the surface of the heat insulating material 133 facing the ceiling space. The airtight sheet is a moisture-proof sheet made of synthetic resin. The gaps between the rafters 139 supporting the roof boards 137 that constitute the roof are also filled with heat insulating material 140, and the heat insulating material 140 and the multiple rafters 139 are covered with the heat insulating material 133. The side portion 134 includes heat insulating materials 135A, 135B and a beam 136, the surface of the heat insulating material 135A above the beam 136 facing the hollow space of the second chamber R4 being covered with an airtight sheet, and the heat insulating material 135B below the beam 136 is covered by an interior wall panel 138 of the second floor, which will be described later, extending up to the ceiling. Also, without providing a separate airtight sheet, heat insulating materials whose inner surfaces are made up of an airtight layer, and a framework structure such as an RC framework can be used to increase airtightness. The heat insulating materials 133, 135A, 135B, and 140 are made of, but not limited to, glass wool, for example.

[0027] The third chamber R5 is configured using a part of the first living portion R1 and a part of the second living portion R2, and is provided above the first living portion R1 and below the second living portion R2. Specifically, the third chamber R5 is hollow and includes a ceiling board 141 whose lower surface is exposed to the living space of the first living portion R1, a floor board 143 disposed above the ceiling board 141 and whose upper surface is exposed to the living space of the second living portion R2, and a side portion 145. The side portion 145 includes a beam 147 and a heat insulating material 135 provided inside the outer wall portion 160. The heat insulating material 135 provided in the first living portion R1 is denoted by reference symbol 135C, and the heat insulating material 135 provided in the second living portion R2 is denoted by reference symbol 135B. In addition, the inner wall panel 138 on the second floor, which will be described later, extends to the third chamber R5 and covers the heat insulating material 135B, and the inner wall panel 138 on the first floor extends to the third chamber R5 and covers the heat insulating material 135C.

[0028] Moreover, the exterior wall portion 160 of the house 10 includes an exterior wall panel 161 and a reinforcing surface material 163 provided inside the exterior wall panel 161 with a gap R6 therebetween. The reinforcing surface material 163 is, for example, plywood, gypsum board, etc. Furthermore, heat insulating materials 135B and 135C are provided inside the reinforcing surface material 163, and further an interior wall panel 138 such as a gypsum board is provided inside the heat insulating materials 135B and 135C.

[0029] The reinforcing surface material 163 of the exterior wall portion 160 of the house 10 is provided from the outer surface of the foundation 115 to the roof rafters 139. Furthermore, the roof boards 137 are composed of the reinforcing surface material. In the house 10, the reinforcing surface material covers the entire outside of the insulation materials 135A, 135B, 135C, and 140, except for the foundation 110, windows, entrances such as the front door, and ventilation points.

[0030] The house 10 has a first living area R1 and a second living area R2, and is provided with partition walls 171 and 172. The number of rooms is not limited to that shown in the figure, and each floor may have one or more rooms.

[0031] (Ventilation Equipment 20) Next, the ventilation device 20 installed in the house 10 will be described. As shown in FIG. 2, the ventilation device 20 includes a supply Air 30 and the exhaust through which indoor air flows. Air 40 and Air 30 and exhaust Air and a main body 50 that is provided in the middle of the outlet 40 and performs heat exchange and ventilation. Air Of the ducts 30, the one disposed upstream of the main body 50 is referred to as an upstream air supply duct 310, and the one disposed downstream of the main body 50 is referred to as a downstream air supply duct 320. Air Of the ducts 40 , the one disposed upstream of the main body 50 is referred to as an upstream exhaust duct 410 , and the one disposed downstream of the main body 50 is referred to as a downstream exhaust duct 420 .

[0032] Although not shown in the drawings, the main body 50 has an intake air flow path through which outside air flows and an exhaust air flow path through which indoor air flows. As shown in Fig. 3, the main body 50 has a heat exchanger 510 disposed at the intersection of the intake air flow path and the exhaust air flow path. The heat exchanger 510 is a total heat exchanger or a sensible heat exchanger. Also, an intake air blower 520 such as a sirocco fan, an exhaust air blower 530, and a filter for collecting foreign matter are provided.

[0033] The main body 50 has a first connection portion 541 that protrudes in a tapered shape for connecting the upstream air supply duct 310 to the upstream end of the air supply flow path. The main body 50 has a second connection portion 542 that protrudes in a tapered shape for connecting the downstream air supply duct 320 to the downstream end of the air supply flow path. Furthermore, main body 50 has a third connection portion 543 that protrudes in a tapered shape for connecting upstream exhaust duct 410 to the upstream end of the exhaust flow path. Main body 50 has a fourth connection portion 544 that protrudes in a tapered shape for connecting downstream exhaust duct 420 to the downstream end of the exhaust flow path.

[0034] The main body 50 is accommodated in the third chamber R5. For example, the main body 50 is fixed to a house structural part such as a joist 149 that supports a floor board 143 of the second living part R2 via a bracket or the like.

[0035] (Upstream air supply duct 310) Upstream air supply duct 310 extends from suction port 330 provided in exterior wall panel 161 to first connection portion 541 of main body 50. Suction port 330 is a so-called hood, and an upstream end of upstream air supply duct 310 is connected to this connection portion, and a downstream end of upstream air supply duct 310 is connected to first connection portion 541.

[0036] The structure and material of the upstream air supply duct 310 are not limited, but it is preferable that the upstream air supply duct 310 is, for example, a tubular fireproof layer such as glass wool, the inside of which is configured as a flow path, and can be flexibly bent. The inner diameter φ of the upstream air supply duct 310 is not limited, but is, for example, 75 mm, 100 mm, 125 mm, or 150 mm.

[0037] (Downstream air supply duct 320) The downstream air supply duct 320 has an upstream end connected to the second connection part 542 of the main body 50, and a downstream end 321 held by a saddle or the like inside the third chamber R5. This downstream end 321 constitutes an outlet for the outside air to the third chamber R5. The structure and material of the downstream air supply duct 320 are not limited, but it is preferable that the downstream air supply duct 320 is flexibly bendable, for example, with the inner surface of nonwoven fabric covered with PET felt and aluminum vapor deposition film. The inner diameter φ of the downstream air supply duct 320 is not limited, but is, for example, 75 mm, 100 mm, 125 mm, or 150 mm.

[0038] (Upstream exhaust duct 410) The upstream exhaust duct 410 includes a first chamber exhaust duct 411 extending from inside the first chamber R3 to inside the third chamber R5, a second chamber exhaust duct 412 extending from inside the second chamber R4 to inside the third chamber R5, a first indoor exhaust duct 413 connected to a first exhaust port 71 (described later) provided on the floor board 143 of the second living area R2 and provided inside the third chamber R5, a second indoor exhaust duct 414 connected to a second exhaust port 72 (described later) provided on the floor board 143 of the second living area R2 and provided inside the third chamber R5, and a main body connection duct 415 whose downstream end is connected to a third connection part 543 of the main body part 50 and provided inside the third chamber R5. In FIG. 1 and FIG. 5 described later, the upstream exhaust duct 410 is shown by a thinner line than the upstream air supply duct 310 and the downstream air supply duct 320.

[0039] The first chamber exhaust duct 411, the second chamber exhaust duct 412, the first indoor exhaust duct 413, and the second indoor exhaust duct 414 are connected by a two-input, one-output type pipe joint shown in Fig. 4, and the joined indoor air flows toward the main body 50 through the main body connection duct 415. The pipe joint has two inflow connectors 61A, 61B for inflow, and an outflow connector 62 through which the joined indoor air flows out. A so-called Y branch can be used as this two-input, one-output type pipe joint.

[0040] In the upstream exhaust duct 410, the exhaust amount per unit time from the first chamber exhaust duct 411 is EA1 [m 3 / h], and the exhaust volume per unit time from the second chamber exhaust duct 412 is EA2 [m 3 / h], and the exhaust volume per unit time from the first indoor exhaust duct 413 is EA3 [m 3 / h], and the exhaust volume per unit time from the second indoor exhaust duct 414 is EA4 [m 3 / h], the ratio of the total exhaust amount EA per unit time by the ventilation device 20 is set, for example, in Table 1 below.

[0041] [Table 1]

[0042] For example, if the exhaust volume EA1 per unit time from the first chamber exhaust duct 411 is 80 [m 3 / h], and the exhaust amount EA2 per unit time from the second chamber exhaust duct 412 is 20 [m 3 / h], and the exhaust amount EA3 per unit time from the first indoor exhaust duct 413 is 20 [m 3 / h], and the exhaust amount EA4 per unit time from the second indoor exhaust duct 414 is 40 [m 3 / h].

[0043] Specifically, the first chamber exhaust duct 411, the second chamber exhaust duct 412, the first indoor exhaust duct 413 and the second indoor exhaust duct 414 are connected as shown in FIG. 5, in that the second chamber exhaust duct 412 is connected to one inlet connection part 61A of the first pipe fitting 610, and the first indoor exhaust duct 413 is connected to the other inlet connection part 61B of the first pipe fitting 610, and the indoor air from the second chamber R4 and the indoor air from the second living area R2 join together.

[0044] The air joined at the first pipe fitting 610 joins with indoor air from the second indoor exhaust duct 414 at the second pipe fitting 620. The second indoor exhaust duct 414 is connected to one inlet connection part 61A of the second pipe fitting 620, and the outlet connection part 62 of the first pipe fitting 610 and the other inlet connection part 61B of the second pipe fitting 620 are connected by a first pipe member 417 that connects the fittings together.

[0045] The air that joins at the second pipe fitting 620 joins with the room air from the first chamber R3 at the third pipe fitting 630. The outflow connection 62 of the second pipe fitting 620 and one of the inflow connection parts 61A of the third pipe fitting 630 are connected by a second pipe member 418 that connects the fittings, and the first chamber exhaust duct 411 is connected to the other of the inflow connection parts 61B of the third pipe fitting 630.

[0046] The upstream end of the main body connecting duct 415 is connected to the outflow connection part 62 of the third pipe joint 630, and the air that joins at the third pipe joint 630 is sent into the main body part 50 via the main body connecting duct 415. The first pipe material 417 and the second pipe material 418 that connect the joints are, for example, ducts.

[0047] Furthermore, as shown in FIG. 1, the upstream end 411A of the first chamber exhaust duct 411 is held inside the first chamber R3, for example by a saddle, to form an inlet, and air within the first chamber R3 is drawn into the upstream end 411A of the first chamber exhaust duct 411 by the exhaust blower 530 of the main body 50.

[0048] The upstream end 412A of the second chamber exhaust duct 412 is held inside the second chamber R4 by a saddle or the like to form an inlet, and air from within the second chamber R4 is drawn into the upstream end 412A of the second chamber exhaust duct 412 by the exhaust blower 530 of the main body 50.

[0049] The upstream end of the first indoor exhaust duct 413 is connected to a first exhaust port 71 provided in the floor panel 143 of the second living area R2, and air from the second living area R2 is drawn into the first exhaust port 71 by the exhaust blower 530 of the main body 50.

[0050] The upstream end of the second indoor exhaust duct 414 is connected to a second exhaust port 72 provided in the floor panel 143 of the second living area R2, and air from the second living area R2 is drawn into the second exhaust port 72 by the exhaust blower 530 of the main body 50.

[0051] The first exhaust port portion 71 and the second exhaust port portion 72 are not limited in structure, but may, for example, comprise a hollow, box-shaped exhaust port main body portion with an opening facing upward, and a cover material (a so-called louver) attached to the opening of this main body portion and having multiple air holes, and the exhaust port main body portion is provided with a connection portion for connecting a duct.

[0052] The first chamber exhaust duct 411 extends to the third chamber R5, for example, through a first floor duct passage of the partition wall 171 of the first living portion R1. The second chamber exhaust duct 412 extends to the third chamber R5, for example, through a second floor duct passage of the partition wall 172 of the second living portion R2. The position where the first chamber exhaust duct 411 penetrates the first living portion R1 is not limited to the inside of the partition wall 171, and it may be disposed in a space such as a storeroom. The same applies to the position where the second chamber exhaust duct 412 penetrates the second living portion R2.

[0053] The first chamber exhaust duct 411, the second chamber exhaust duct 412, the first indoor exhaust duct 413, the second indoor exhaust duct 414, and the main body connection duct 415 are not limited in structure and material, but are preferably made of a nonwoven fabric on the inner surface coated with PET felt and aluminum vapor deposition film, so that they can be bent flexibly. The inner diameters φ of the first chamber exhaust duct 411, the second chamber exhaust duct 412, the first indoor exhaust duct 413, the second indoor exhaust duct 414, and the main body connection duct 415 are not limited, but are, for example, 75 mm, 100 mm, 125 mm, and 150 mm. The inner diameters of the ducts constituting the upstream exhaust duct 410 are not limited to the same size, but the present embodiment will be described on the assumption that each duct has the same inner diameter φ.

[0054] The first pipe joint 610, the second pipe joint 620, and the third pipe joint 630 are made of, for example, a synthetic resin. The first pipe joint 610, the second pipe joint 620, and the third pipe joint 630 are disposed inside the third chamber R5.

[0055] (Downstream exhaust duct 420) The downstream exhaust duct 420 extends from the fourth connection portion 544 of the main body portion 50 to an exhaust port portion 430 provided in the outer wall panel 161. The exhaust port portion 430 is a so-called hood, and the downstream end portion of the downstream exhaust duct 420 is connected to the exhaust port portion 430. Note that it is preferable that the suction port portion 330 and the exhaust port portion 430 are provided at a distance of 3 m or more.

[0056] The downstream exhaust duct 420 is not limited in structure or material, but is preferably a tubular fireproof layer such as glass wool, with the inside configured as a flow path, and is flexible and bendable. The inner diameter φ of the downstream exhaust duct 420 is not limited, but is, for example, 75 mm, 100 mm, 125 mm, or 150 mm.

[0057] Thus, the ventilation device 20 is installed in a house 10 having a first chamber R3, a second chamber R4 and a third chamber R5.

[0058] Furthermore, in the house 10, a floor exhaust port portion 73 that communicates with the inside of the first chamber R3 is provided in the floorboard 119 of the first living area R1, and the indoor air of the first living area R1 flows into the inside of the first chamber R3 from this floor exhaust port portion 73. A plurality of floor exhaust ports 73 are provided. The structure of the device that constitutes the floor exhaust port portion 73 is not limited, but for example, it includes a hollow box-shaped exhaust port main body portion that is attached to the opening of the floorboard 119 and opens upward, and a cover material (louver) that is attached to the opening of this exhaust port main body portion and has a plurality of air holes, and the exhaust port main body portion is provided with a penetration portion that communicates with the inside of the first chamber R3.

[0059] Of the multiple floor exhaust port sections 73, it is desirable that some, for example at least two, are installed in any of the dirty zones, walk-in closets, corridors, halls, and humid rooms described below. Furthermore, some of the multiple floor exhaust port sections 73 may be installed in rooms other than the dirty zones, walk-in closets, corridors, halls, bathrooms, and humid rooms, such as bedrooms, living rooms, and kitchens. For example, the number n11 of floor exhaust port sections 73 installed in the first living area R1 in the dirty zones, walk-in closets, corridors, halls, and humid rooms is set to be smaller than the number n12 of floor exhaust port sections 73 installed in the first living area R1 in rooms such as bedrooms, living rooms, and kitchens (n11 <n12)。

[0060] A ceiling exhaust port 74 that communicates with the interior of the second chamber R4 is provided in the ceiling board 131 of the second living area R2, and indoor air from the second living area R2 flows into the interior of the second chamber R4. At least one ceiling exhaust port 74 is provided. The structure of the device that constitutes the ceiling exhaust port 74 is not limited, but for example, it includes a frame that is attached to the opening in the ceiling board 131 and a cover that blocks the ventilation part inside the frame, and the indoor air flows into the second chamber R4 through the gap between the frame and the cover.

[0061] The ceiling exhaust port 74 is preferably installed in any one of the dirty zone, walk-in closet, corridor, hall, or a room with a lot of moisture, which will be described later. When a plurality of ceiling exhaust ports 74 are provided, some of them may be provided in rooms other than the dirty zone, walk-in closet, corridor, hall, bathroom, or a room with a lot of moisture, such as bedrooms, living rooms, kitchens, etc. For example, the number n21 of the ceiling exhaust ports 74 provided in the second living area R2 in the dirty zone, WIC, corridor, hall, or a room with a lot of moisture is set to be smaller than the number n22 of the ceiling exhaust ports 74 provided in the second living area R2 in rooms such as bedrooms, living rooms, kitchens, etc. (n21 < n22).

[0062] The first air outlet 81 is provided on the ceiling board 141 of the first living area R1, and the outside air that has undergone heat exchange with the indoor air in the main body 50 of the ventilation device 20 blows out into the living space of the first living area R1. A plurality of first air outlets 81 are provided. The device constituting the first air outlet 81 is not limited in structure. For example, the same device as that constituting the ceiling exhaust port 74 attached to the opening of the ceiling board 131 of the second living area R2 can be used.

[0063] The first air outlet 81 is preferably installed in rooms other than the dirty zone, walk-in closet, corridor, hall, bathroom, or a room with a lot of moisture, such as bedrooms, living rooms, kitchens, etc., which will be described later. In rooms such as bedrooms and living rooms, both the first air outlet 81 and the floor exhaust port 73 may be provided.

[0064] The second air outlet 82 is provided on the floor board 143 of the second living area R2, and the outside air that has undergone heat exchange with the indoor air in the main body 50 of the ventilation device 20 blows out into the living space of the second living area R2. A plurality of second air outlets 82 are provided. The device constituting the second air outlet 82 is not limited in structure. For example, the same device as that constituting the floor exhaust port 73 attached to the opening of the floor board 119 of the first living area R1 can be used.

[0065] The second air outlet section 82 is preferably installed in a room such as a bedroom, living room, kitchen, etc., other than a dirty zone, a walk-in closet, a corridor, a hall, a bathroom, or a humid room. In addition, both the second air outlet section 82 and the ceiling exhaust port section 74 may be provided in a room such as a bedroom or living room.

[0066] In the ventilation system 1, it is preferable to omit dedicated ventilation fans in a dirty zone, walk-in closet, corridor, hall, or humid room, which will be described later, in which the first exhaust port 71, the second exhaust port 72, and the floor exhaust port 73 are provided. By eliminating a dedicated ventilation fan separate from the ventilation device 20, the installation work for a ventilation device in a house and the cost of the ventilation device can be reduced.

[0067] Here, FIG. 6 is a plan view of the first living section R1, showing an arrangement example of the first air outlet section 81 provided in the ceiling board 141 on the first floor and the floor exhaust port section 73 provided in the floor board 119 of the first living section R1. Three first air outlet sections 81 are provided, and six floor exhaust port sections 73 are provided (n11 < n12). Further, FIG. 7 is a plan view of the second living section R2, showing an arrangement example of the second air outlet section 82 provided in the floor board 143 of the second living section R2, the first exhaust port section 71, the second exhaust port section 72, and the ceiling exhaust port section 74 provided in the ceiling board 131 on the second floor. Three second air outlet sections 82 are provided, one first exhaust port section 71 is provided, one second exhaust port section 72 is provided, and one ceiling exhaust port section 74 is provided. In the house shown in FIGS. 6 and 7, dedicated ventilation fans are not provided in the toilet and washroom on the first floor where the floor exhaust port section 73 is provided, nor in the toilet on the second floor where the first exhaust port section 71 is provided and the washroom on the second floor where the second exhaust port section 72 is provided. Also, a dedicated ventilation fan is not provided in the walk-in closet on the second floor where the ceiling exhaust port section 74 is provided. Windows that can be opened and closed may be provided in the toilet and washroom on the first floor where the floor exhaust port section 73 is provided, the toilet on the second floor where the first exhaust port section 71 is provided, the washroom on the second floor where the second exhaust port section 72 is provided, and the walk-in closet on the second floor where the ceiling exhaust port section 74 is provided. Further, in the house shown in FIGS. 6 and 7, although not shown, a ventilation fan dedicated to the kitchen (kitchen range hood) is provided separately from the ventilation device 20, and a ventilation fan dedicated to the bathroom (bath ventilation fan) is also provided. In the kitchen, both a ventilation fan (kitchen range hood) and the floor exhaust port section 73 may be provided. FIG. 8 is a plan view of the foundation 110 constituting the first chamber R3, with the rising portion 112 hatched and shown, and also shows the floor exhaust port section 73 provided on the first floor in this plan view.

[0068] In this way, the ventilation system 1 is configured by installing the ventilation device 20 in the house 10 and the house 10 being provided with the air outlet sections (81, 82) and the exhaust port sections (71 to 74).

[0069] In addition, when the house 10 is completed with the ventilation system 1 installed, it is preferable that the equivalent gap area of ​​the house 10 be 1.0 cm2 or less according to "JIS A2201:2017 (Test method for airtightness performance of houses, etc. using fans)". 2 / m 2 ] is constructed as follows. The equivalent gap area (=α×Or / b) is calculated by considering the inside and outside of the house as one space and generating a pressure difference ΔP between the inside and outside of the building and the air flow rate Or [m 3 / h], multiplying this by the flow coefficient α (0≦α≦1) to convert it to the gap area, and then multiplying this conversion value α×Or by the total floor area b [m 2 ]. The flow rate Or is the blower air volume when the pressure difference ΔP is 9.8 [Pa]. In addition, when the airtightness performance is measured, the operation of the main body 50 of the ventilation device 20 and other ventilation fans (kitchen range fan and bathroom ventilation fan in the house shown in Fig. 6 and Fig. 7) is stopped, and the intake port 330 for sucking in outside air and the exhaust port 430 for exhausting indoor air provided in the exterior wall 160 and other ventilation fans (kitchen range fan and bathroom ventilation fan in the house shown in Fig. 6 and Fig. 7) are sealed and closed. Furthermore, the floor exhaust port 73, the ceiling exhaust port 74, the first air outlet 81 and the second air outlet 82 are sealed, and the equivalent gap area is calculated without including the first chamber R3, the second chamber R4 and the third chamber R5 in the room, that is, without including their virtual areas described later in the total floor area b.

[0070] The ventilation performed by the ventilation system 1 will be described below. First, the air supply will be described. Outside air is sent from the intake port 330 through the upstream air supply duct 310 into the main body 50 by the intake fan 520 of the main body 50. The outside air passes through the heat exchanger 510 in the main body 50, where it exchanges heat with the exhausted indoor air. The outside air that has undergone heat exchange is sent by the intake fan 520 to the downstream air supply duct 320, and is blown out from the end 321 (air outlet) of the downstream air supply duct 320 into the third chamber R5.

[0071] As outside air continues to flow into the third chamber R5 by the supply air blower 520, the third chamber R5 is filled with outside air, and the excess outside air is blown out from a first air outlet 81 provided in the ceiling board 141 of the first living portion R1 and supplied to the first living portion R1. Also, the outside air in the third chamber R5 is blown out from a second air outlet 82 provided in the floor board 143 of the second living portion R2 and supplied to the second living portion R2.

[0072] Next, the exhaust will be described. The exhaust fan 530 of the main body 50 causes the air in the first chamber R3 to enter the end 411A (inlet) of the first chamber exhaust duct 411 and be sent to the main body 50. As the air in the first chamber R3 continues to be sent to the main body 50, and as air is supplied to the first living space R1, the indoor air of the first living space R1 flows into the floor exhaust port 73 of the floor board 119. In the configuration example of the first chamber R3 shown in FIG. 8, the indoor air of the first living space R1 flows into the first chamber R3 from each of the six floor exhaust port 73, mixes in the first chamber R3, and is exhausted to the outdoors via the end 411A of the first chamber exhaust duct 411 and the main body 50.

[0073] The exhaust fan 530 of the main body 50 sends the air in the second living portion R2 to the main body 50 through the first exhaust port 71 of the floor board 143 of the second living portion R2 and the first indoor exhaust duct 413, and further sends it to the main body 50 through the second exhaust port 72 of the floor board 143 of the second living portion R2 and the second indoor exhaust duct 414. The exhaust fan 530 of the main body 50 also sends the air in the second chamber R4 to the end 412A (inlet) of the second chamber exhaust duct 412 and to the main body 50. As the air in the second chamber R4 continues to be sent to the main body 50, and as air is supplied to the second living portion R2, the indoor air in the second living portion R2 flows into the ceiling exhaust port 74 of the ceiling board 131. Although not shown in the figure, when multiple ceiling exhaust outlets 74 are provided in the second floor ceiling panel 131, the indoor air of the second living area R2 flows into the second chamber R4 from each of the multiple ceiling exhaust outlets 74, mixes in the second chamber R4, and is exhausted to the outdoors through the end 412A and main body 50 of the second chamber exhaust duct 412.

[0074] The indoor air flowing through the second chamber exhaust duct 412 and the first indoor exhaust duct 413 joins at the first pipe joint 610, further joins with the indoor air of the second indoor exhaust duct 414 at the second pipe joint 620, and then joins with the indoor air of the first chamber exhaust duct 411 at the third pipe joint 630, flows through the main body connection duct 415, and enters the main body 50. After exchanging heat with the outside air, the indoor air passes through the downstream exhaust duct 420 and is exhausted to the outdoors from the exhaust port 430.

[0075] (required ventilation volume) Required ventilation volume per unit time for house 10 V1 [m 3 V1 / h] is the value obtained by multiplying the total floor area a (the sum of the total floor area a1 of the first floor and the total floor area a2 of the second floor) by the height H of the room, and then multiplying it by the number of ventilation cycles n per unit time (V1=a×H×n). n is set to 0.5 since the air in the living space is replaced once every two hours. The required ventilation volume V1 is calculated using the floor plans in Figures 6 and 7 as examples. The total floor area a1 of the first floor in Figure 6 is 63.72 m 2 (19.25 tsubo), and the total floor area a2 on the second floor in Figure 7 is 55.44 m 2 (16.75 tsubo) and the total floor area a is 119.16 m 2 However, to exclude the bathroom ventilation, the total is reduced by 1 tsubo to 115.85 m. 2 The total floor area is a. The height H is 2.4m for both the first and second floors, and the required ventilation volume V1 is 139.02 [m 3 / h].

[0076] Next, the ventilation volume V2 of the main body 50 per hour is set to, for example, 160 [m 3 The ideal intake and exhaust volumes are explained below for a ventilation volume V2 of 160 [m 3 / h] means that the air supply is 160 [m 3 / h] and the displacement is 160 [m 3 / h].

[0077] The amount of outside air supplied to the third chamber R5 per unit time is 160 [m 3 / h], and in the ventilation system 1, the amount of air supplied from the third chamber R5 to the first living area R1 and the amount of air supplied from the third chamber R5 to the second living area R2 are set to be the same. Three first air outlets 81 are provided in the ceiling panel 141 of the first living area R1, and the total supply amount from these first air outlets 81 is 80 [m 3 / h]. Three second air outlets 82 are provided on the floor plate 143 of the second living area R2, and the total supply volume from these second air outlets 82 is 80 [m 3 / h].

[0078] Six floor exhaust ports 73 are provided on the floor plate 119 of the first living area R1, and the amount of air flowing into each of the floor exhaust ports 73 per unit time is approximately 13 m 3 / h], and ideally, the amount of air flowing into the first chamber R3 per unit time is 80 [m 3 / h].

[0079] The amount of air flowing into the first exhaust port 71 of the floor plate 143 of the second living area R2 per unit time is 20 [m 3 / h], and the amount of air flowing into the second exhaust port 72 per unit time is 40 [m 3 / h]. Furthermore, the amount of air flowing into the ceiling exhaust port 74 of the ceiling panel 131 of the second living area R2 per unit time is 20 [m 3 / h].

[0080] In the upstream exhaust duct 410, the room air joins at the first pipe joint 610, the second pipe joint 620, and the third pipe joint 630, and the total flow rate is 160 [m 3 / h]. In this way, the ventilation volume per unit time for simultaneous supply and exhaust by the main body 50 is 160 [m 3 / h], the required amount of ventilation can be achieved.

[0081] In the first embodiment of the ventilation system 1, the main body 50 of the ventilation device 20 is housed in the third chamber R5, and the end 321 (air outlet) of the downstream air supply duct 320 is open into the third chamber R5, so that the inside of the third chamber R5 is filled with outside air and air can be suitably supplied to the first living area R1 and the second living area R2 from the first air outlet section 81 and the second air outlet section 82.

[0082] In addition, in the ventilation system 1, the exhaust blower 530 allows the indoor air to be suitably exhausted to the outdoors using the paths K1, K2, K3, and K4 described below, passing through the third chamber R5 filled with outside air but without mixing with the outside air. K1: A path that flows from the floor exhaust port 73 through the first chamber R3, the first chamber exhaust duct 411, the main body 50, and the downstream exhaust duct 420. K2: A path that flows from the ceiling exhaust port 74 through the second chamber R4, the second chamber exhaust duct 412, the main body 50, and the downstream exhaust duct 420. K3: A path from the first exhaust port 71 through the first indoor exhaust duct 413 and the main body 50 to the downstream exhaust duct 420. K4: A path that flows from the second exhaust port 72 through the second indoor exhaust duct 414 and the main body 50 to the downstream exhaust duct 420. By using the ventilation device 20, ventilation, for example, exhausting indoor air that has odors, while supplying fresh air, can be suitably performed.

[0083] In this way, by using the third chamber R5 to supply air, Air In addition, by using the first chamber R3 and the second chamber R4 for exhaust, the exhaust Air This can reduce the amount of chemical used.

[0084] Furthermore, in the ventilation device 20, the points at which the main body 50 draws in indoor air through the upstream exhaust duct 410 are limited to four locations, specifically, the upstream end 411A of the first chamber exhaust duct 411, the upstream end 412A of the second chamber exhaust duct 412, the first exhaust port portion 71 attached to the upstream end of the first indoor exhaust duct 413, and the second exhaust port portion 72 attached to the upstream end of the second indoor exhaust duct 414. Since these only need to be installed inside the first chamber R3, inside the second chamber R4, and on the floor boards of the second living area R2, installation work is easy.

[0085] On the other hand, in the ventilation system shown in Patent Document 1, a blower is installed at the end of an exhaust duct for exhausting air in the attic on the second floor, and a blower is installed at the end of an exhaust duct for exhausting air under the floor on the first floor, and wiring is also required to power the blower, making the installation work in the space under the floor and in the attic complicated. Furthermore, in Patent Document 2, the ventilation device and the air conditioner need to be connected with a duct, which may complicate the installation work of the ventilation device and the air conditioner. However, the ventilation device 20 in the ventilation system 1 is a device separate from the air conditioner, and furthermore, no air conditioner (indoor unit) needs to be installed in the third chamber R5; it is sufficient to install the main body 50 of the ventilation device 20 and piping, making the installation work easy.

[0086] Furthermore, in the whole-building air-conditioning system of Patent Document 3, the main body of the ventilation device and the air conditioner are installed between floors without being connected by a duct, and the air on the second floor is sucked into the main body through the floor space from the intake port provided in the floor panel (paragraph 0059 of Patent Document 3). However, this causes the outside air supplied to the floor space from the main body of the ventilation device to mix with the indoor air that enters the floor space from the intake port, and there are multiple outlets on the ceiling panel of the first floor and the floor panel of the second floor between the main body of the ventilation device, which is installed in the center of the building between the floors, and the intake port provided in the floor panel. Even if the indoor air flows into the floor space from the intake port, there is a risk that the indoor air that has entered the floor space will return to the living area from the outlet port before reaching the main body of the ventilation device. Furthermore, since the air between the floors enters the main body of the ventilation device and is exhausted to the outdoors, there is a risk that the outdoor air supplied to the floor space from the main body of the ventilation device will be exhausted by a shortcut. This does not allow the exhaust of indoor air and the supply of outdoor air to be performed appropriately. In contrast to Patent Document 3, in the ventilation system 1 of this embodiment, the third chamber R5 provided with the first air outlet 81 and the second air outlet 82 is used as the air supply flow path, and the indoor air is exhausted through the exhaust paths K1-K4 into the third chamber R5 filled with outside air without being mixed with the outside air, and further, since the main body 50 does not have an open suction port in the third chamber R5, the outside air supplied to the third chamber R5 is not exhausted through a shortcut. This allows for optimal simultaneous exhaust and air supply ventilation.

[0087] (Modification of ventilation system) The ventilation system can be configured by changing the proportions of the exhaust volumes EA1, EA2, EA3, and EA4 of the first chamber exhaust duct 411, the second chamber exhaust duct 412, the first indoor exhaust duct 413, and the second indoor exhaust duct 414 in the total exhaust volume per unit time of the ventilation system. For example, the exhaust volumes EA1, EA2, EA3, and EA4 can be set to the proportions shown in Table 2.

[0088] [Table 2]

[0089] 9 is a diagram showing the configuration of the ventilation device 20A when the ratios of the exhaust volumes EA1, EA2, EA3, and EA4 of the first chamber exhaust duct 411, the second chamber exhaust duct 412, the first indoor exhaust duct 413, and the second indoor exhaust duct 414 in the exhaust volume per unit time of the ventilation device 20A are set to the ratios shown in Table 2. In FIG. 9, the upstream exhaust duct 410 is shown with a thinner line than the upstream air supply duct 310 and the downstream air supply duct 320. In the upstream exhaust duct 410' of the ventilation device 20A, the first indoor exhaust duct 413 is connected to one inlet connection part 61A of the first pipe joint 610, and the second indoor exhaust duct 414 is connected to the other inlet connection part 61B of the first pipe joint 610, and the room air from the first exhaust port part 71 and the room air from the second exhaust port part 72 join together. Furthermore, the second chamber exhaust duct 412 is connected to one inlet connection 61A of the second pipe joint 620, and the outlet connection 62 of the first pipe joint 610 is connected to the other inlet connection 61B of the second pipe joint 620 via a pipe member 417. This allows the room air from the first exhaust port 71 and the air from the second exhaust port 72 to merge with the room air from the second chamber R4. After merging with the air from the first chamber R3 at the third pipe joint 630, this room air is discharged to the outdoors via the main body connection duct 415, the main body 50, the downstream exhaust duct 420, and the exhaust port 430.

[0090] If the displacement EA3 and the displacement EA4 are the same, for example, 20.0 [m 3 / h], the floor area is 1.6 [m 2 ], and the ceiling height is 2.5 [m]. 3 If a first exhaust port 71 is provided in a toilet of the same size, and a second exhaust port 72 is provided in another toilet of the same size, each toilet can be ventilated five times per hour. This satisfies the minimum ventilation frequency (five times) required for ventilation of toilets in an ordinary house. In this way, it is advisable to provide the first exhaust port 71 and the second exhaust port 72 in a place where odors etc. are generated, such as a dirty zone, and use them as a ventilation system. If the exhaust volume EA4 is set to 20.0 [m 3 / h], it is preferable to use the piping shown in FIG. 5 or to increase the air volume of the exhaust fan of the main body 50.

[0091] In addition to toilets, dirty zones include, for example, washrooms, dressing rooms, shoe closets (sometimes written as SIC), and entrances. They may also be installed in walk-in closets (sometimes written as WIC) that store a lot of clothes, corridors, halls, and humid rooms. Bathrooms are not included in dirty zones and humid rooms. If any of these are configured together, for example, if the washroom and dressing room are in one room, it can be treated as a washroom that also serves as a dressing room. In this embodiment, the term humid room is used to mean not only humid rooms, but also storage spaces in a house such as closets and cupboards.

[0092] The house has a plurality of living spaces such as a first floor toilet, a second floor toilet, a washroom, a dressing room, a shoe closet, an entrance, a walk-in closet, a corridor, and a hall as locations for providing the first exhaust port 71 and the second exhaust port 72, and the first exhaust port 71 is provided in one of these living spaces, and the second exhaust port 72 is provided in another living space. Note that the living space where the first exhaust port 71 and the second exhaust port 72 are provided is not limited to the second floor of the house, and one of the first exhaust port 71 and the second exhaust port 72 can be provided in the floor board 143 of the second living space R2 and the other in the ceiling board 141 of the first living space R1, or both can be provided in the ceiling board 141 of the first floor.

[0093] Here, we will explain a method for determining whether to attach the first exhaust port 71 connected to the main body 50 contained in the third chamber R5 via the first indoor exhaust duct 413 and the second exhaust port 72 connected to the main body 50 via the second indoor exhaust duct 414 to the ceiling panel 141 of the first living area R1 or the floor panel 143 of the second living area R2, using an example of a house layout that includes, as living spaces, a kitchen, living room, multiple private rooms, bathrooms, etc., as well as a first floor toilet, a second floor toilet, a washroom that also serves as a dressing room, a shoe closet, a walk-in closet, and a hallway.

[0094] As shown in Figure 10, the determination method includes a first judgment process S1 for determining a first selected space portion in which a first exhaust port portion 71 will be provided among a floor plan having a plurality of living space portions, and a second judgment process S2 for determining a second selected space portion in which a second exhaust port portion 72 will be provided among a floor plan having a plurality of living space portions.

[0095] (First judgment step S1) First, the first judgment step S1 will be described. In the first judgment step S1, a judgment is made as to whether or not to install the first exhaust port 71 in the order of priority as a planned location indicated by the reference information in Table 3 below. The reference information indicates the priority order of each living space regarding the installation of the first exhaust port 71 and the second exhaust port 72, and the priority order is based on the layout of the house, and specifically, depends on the necessity of discharging air pollutants in each living space. Here, air pollutants are, for example, carbon dioxide, carbon monoxide, nitrogen dioxide, sulfur dioxide, ozone, odor, water vapor (humidity), suspended dust, radon daughter nuclides, asbestos, and suspended microorganisms. In Table 3, the toilet is listed as the object to be installed with the highest priority.

[0096] [Table 3]

[0097] Further, the determination of the planned installation location of the first exhaust port unit 71 is performed in the order from the second floor to the first floor. As shown in Fig. 11, in the first determination step S1, it is determined in steps A1 to A10 whether the first exhaust port unit 71 can be installed on the second floor, and if it cannot be installed on the second floor, it is decided in step A11 that the first exhaust port unit 71 will be installed on the first floor, and the location of the first exhaust port unit 71 on the first floor is determined in steps A12 to A20.

[0098] Specifically, first, in step A1, the location where the first exhaust port 71 is to be installed (hereinafter, the planned installation location) is a toilet, and it is determined whether it is OK to install it in the toilet. In the determination of step A1, as shown in Fig. 12, a first confirmation step C11 is performed to confirm whether the planned installation location satisfies a first condition that the house is provided with the first exhaust port 71, a second confirmation step C12 is performed to confirm whether the planned installation location satisfies a second condition that a ventilation fan other than the ventilation device 20, 20A (for example, a dedicated ventilation fan for the toilet) is not provided with the first exhaust port 71, and a third confirmation step C13 is performed to confirm whether the planned installation location satisfies a third condition that the ceiling exhaust port 74 is not provided with the first exhaust port 71.

[0099] When deciding where to install the first exhaust port 71 on the second floor, it is necessary to prepare the following information in advance. First information: Information about the layout of the first and second floors of the house Second information: Information regarding the location of a ventilation fan installed separately from the ventilation device 20, 20A in the house Third information: Information regarding the living space portion in which the ceiling exhaust port portion 74 is provided in the ceiling panel 131 of the second living portion R2. The first confirmation step C11 makes a judgment based on the first information, the second confirmation step C12 makes a judgment based on the second information, and the third confirmation step C13 makes a judgment based on the third information.

[0100] If the first condition, the second condition, and the third condition are satisfied, the toilet is determined as the first selected space in step A2, and the judgment process ends. When the planned location of the first exhaust port 71 is determined in this manner, information about the planned location of the first exhaust port 71 is set as the fourth information. In the subsequent steps, when the planned location is determined, information about the planned location of the first exhaust port 71 is also set as the fourth information.

[0101] On the other hand, if any of the first, second and third conditions is not satisfied, the target to be the planned installation location is changed to the next priority and the process proceeds to the next step A3 where the same process is performed.

[0102] In step A3, the planned installation location is changed to a washroom and a judgment is made. In this step A3, as in step A1, the planned installation location is set to a washroom and a first confirmation step C11, a second confirmation step C12, and a third confirmation step C13 shown in Fig. 12 are performed, and if the first condition, the second condition, and the third condition are satisfied, the washroom is determined to be the first selected space portion in step A4, and the judgment process is terminated. On the other hand, if any of the first condition, the second condition, and the third condition are not satisfied, the target to be the planned installation location is changed to the next priority, and the same process is performed in the next step A5.

[0103] In step A5, the planned installation location is changed to a walk-in closet and a judgment is made. In this step A5, as in step A1, the planned installation location is set to a walk-in closet and the first confirmation step C11, second confirmation step C12, and third confirmation step C13 shown in Fig. 12 are performed, and if the first condition, second condition, and third condition are met, the walk-in closet is determined to be the first selected space in step A6, and the judgment process is terminated. On the other hand, if any of the first condition, second condition, and third condition are not met, the target that will be the planned installation location is changed to the next priority and the same process is performed in the next step A7.

[0104] In step A7, the planned installation location is changed to a shoe closet and judged. In this step A7, as in step A1, the planned installation location is set to a shoe closet and the first confirmation step C11, second confirmation step C12 and third confirmation step C13 shown in Fig. 12 are performed, and if the first condition, second condition and third condition are satisfied, the shoe closet is determined to be the first selected space portion in step A8 and the judgment step is terminated. On the other hand, if any of the first condition, second condition and third condition are not satisfied, the target to be the planned installation location is changed to the next priority and the same process is performed in the next step A9.

[0105] In step A9, the planned installation location is changed to a corridor and judged. In this step A9, as in step A1, the planned installation location is set to a corridor, and the first confirmation step C11, the second confirmation step C12, and the third confirmation step C13 shown in FIG. 12 are performed. If the first condition, the second condition, and the third condition are satisfied, the corridor is determined to be the first selected space in step A10, and the judgment step is terminated. On the other hand, if any of the first condition, the second condition, and the third condition is not satisfied, it is determined that there is no planned installation location for the first exhaust port unit 71 on the second floor, and the planned arrangement location of the first exhaust port unit 71 is set to the first floor (step A11). In step A11, if there is no planned installation location for the first exhaust port unit 71 on the second floor, the fifth information regarding the planned installation location of the second exhaust port unit 72 is set to the first floor. Note that the fifth information is preset to the content that the planned installation location of the second exhaust port unit 72 is set to the second floor, and the fifth information is updated to the content that the planned installation location of the second exhaust port unit 72 is set to the first floor through step A11.

[0106] (Decision on installation of first exhaust vent 71 on the first floor) In step A12, the planned installation location is changed to the toilet on the first floor and judged. In this step A12, similar to step A1, the planned installation location is set to the toilet on the first floor, and the first confirmation step C11, the second confirmation step C12, and the third confirmation step C13 shown in FIG. 12 are performed. When deciding the location for providing the first exhaust port portion 71 on the first floor, it is necessary to prepare the above-mentioned first information, second information, and the following sixth information. Sixth information: Information regarding the living space portion having the floor exhaust port portion 73 provided in the floor plate 119 of the first living portion R1 The first confirmation process C11 for each room on the first floor is based on the first information, the second confirmation process C12 is based on the second information, and the third confirmation process C13 is based on the sixth information instead of the third information. In the third confirmation process C13, it is confirmed whether or not the planned installation location satisfies the third condition that the floor exhaust port 73 is not provided.

[0107] If the first, second and third conditions are met, the toilet on the first floor is determined as the first selected space in step A13, and the judgment process is terminated. On the other hand, if any of the first, second and third conditions is not met, the target to be the planned installation location is changed to the next priority and the same process is performed in step A14.

[0108] In step A14, the planned installation location is changed to the washroom on the first floor and judged. In this step A14, as in step A12, the planned installation location is set to the washroom on the first floor and the first confirmation step C11, second confirmation step C12 and third confirmation step C13 shown in Fig. 12 are performed, and if the first condition, second condition and third condition are satisfied, the washroom on the first floor is determined as the first selected space part in step A15 and the judgment step is terminated. On the other hand, if any of the first condition, second condition and third condition are not satisfied, the target to be the planned installation location is changed to the next priority and the same process is performed in the next step A16.

[0109] In step A16, the planned installation location is changed to a walk-in closet on the first floor and judged. In this step A14, similar to step A12, the planned installation location is set to a walk-in closet on the first floor and the first confirmation step C11, second confirmation step C12 and third confirmation step C13 shown in Fig. 12 are performed, and if the first, second and third conditions are met, the walk-in closet on the first floor is determined to be the first selected space in step A17 and the judgment step is terminated. On the other hand, if any of the first, second and third conditions are not met, the target to be the planned installation location is changed to the next priority and the same process is performed in the next step A18.

[0110] In Project A18, it is determined by changing the planned installation location to the shoe closet on the first floor. Similar to Project A12 and the like, in this Project A18, with the planned installation location being the shoe closet, the first confirmation process C11, the second confirmation process C12, and the third confirmation process C13 shown in FIG. 12 are carried out. When the first condition, the second condition, and the third condition are satisfied, in Project A19, the shoe closet on the first floor is determined as the first selection space part, and the determination process ends. On the other hand, when any of the first condition, the second condition, and the third condition is not satisfied, the corridor is determined as the first selection space part (Project A20). This corridor may be, for example, the hall.

[0111] (Second Judgment Process S2) Next, the second judgment process S2 will be described. The second judgment process S2 makes a judgment on whether to install the second exhaust port part 72 in the order of priority as the planned location indicated by the reference information in Table 3 above.

[0112] In the second judgment process S2 shown in FIG. 13, in Process B1, it is judged whether the planned location for arranging the second exhaust port part 72 can be the toilet on the first floor. When the planned location for arranging the second exhaust port part 72 is not set as the toilet on the first floor, in Process B3, based on the fifth information of the first judgment process S1, it is judged whether it is possible to start judging the planned location for arranging the second exhaust port part 72 for the second floor. In Processes B4 to B11, it is judged whether the second exhaust port part 72 can be set on the second floor. When it cannot be set on the second floor, in Processes B12 to B18, the arrangement location of the second exhaust port part 72 on the first floor is determined.

[0113] Specifically, first, in step B1, the planned installation location of the second exhaust port unit 72 is the toilet on the first floor, and it is determined whether it is acceptable to install it in the toilet on the first floor. As shown in Fig. 14, step B1 includes a first confirmation step C21 for confirming whether the planned installation location (toilet on the first floor) satisfies the first condition that the house is provided with the second exhaust port unit 72, a second confirmation step C22 for confirming whether the planned installation location (toilet on the first floor) satisfies the second condition that a ventilation fan (e.g., a dedicated ventilation fan for the toilet) other than the ventilation devices 20 and 20A is not provided with the second exhaust port unit 72, a third confirmation step C23 for confirming whether the planned installation location (toilet on the first floor) satisfies the third condition that the floor exhaust port unit 73 is not provided with the second exhaust port unit 72, and a fourth confirmation step C24 for confirming whether the planned installation location (toilet on the first floor) satisfies the fourth condition that the first exhaust port unit 71 is not provided with the second exhaust port unit 72. The first confirmation process C21 makes a judgment based on the first information, the second confirmation process C22 makes a judgment based on the second information, the third confirmation process C23 makes a judgment based on the sixth information (information regarding the position where the floor exhaust outlet section 73 will be provided on the floor panel 119 of the first living area R1), and the fourth confirmation process C24 makes a judgment based on the fourth information.

[0114] Then, if the first, second, third and fourth conditions are met, the toilet on the first floor is determined to be the second selected space in step B2, and the judgment process ends. On the other hand, if the second exhaust vent unit 72 is not installed in the toilet on the first floor, a judgment is made in step B3 based on the fifth information as to whether it is OK to proceed with the judgment of the planned installation location of the second exhaust vent unit 72 for the second floor. If step A11 has not been passed in the first judgment process S1, the fifth information is for the second floor, and in that case, the judgment of the planned installation location proceeds from the second floor.

[0115] (Judgment on installation of second exhaust vent 72 on the second floor) In step B4, the planned installation location of the second exhaust port unit 72 is the washroom, and it is determined whether it is acceptable to install the second exhaust port unit 72 in the washroom. In step B4, as in step B1, as shown in Fig. 14, the planned installation location is the washroom, and a first confirmation step C21 is performed to confirm whether the planned installation location (washroom) satisfies a first condition that the house is provided with the second exhaust port unit 72, a second confirmation step C22 is performed to confirm whether the planned installation location (washroom) satisfies a second condition that a ventilation fan (e.g., a ventilation fan dedicated to the washroom) other than the ventilation device 20, 20A is not provided, a third confirmation step C23 is performed to confirm whether the planned installation location (washroom) satisfies a third condition that the ceiling exhaust port unit 74 is not provided, and a fourth confirmation step C24 is performed to confirm whether the planned installation location (washroom) satisfies a fourth condition that the first exhaust port unit 71 is not provided. In the third confirmation process C23 on the second floor, the third information is used instead of the sixth information (information regarding the position where the floor exhaust outlet section 73 will be installed on the floor board 119 of the first living area R1) to confirm the third condition that the planned installation location does not have a ceiling exhaust outlet section 74.

[0116] If the first, second, third and fourth conditions are met, the washroom is determined as the second selected space in step B5, and the judgment process is terminated. On the other hand, if any of the first, second, third and fourth conditions are not met, the target to be the planned installation location is changed to the next priority and the same process is performed in step B6.

[0117] In step B6, the planned installation location is changed to a walk-in closet and judged. In this step B6, as in step B1, the planned installation location is set to a walk-in closet and the first confirmation step C21, second confirmation step C22, third confirmation step C23 and fourth confirmation step C24 shown in Fig. 14 are performed, and if the first condition, second condition, third condition and fourth condition are satisfied, the walk-in closet is determined to be the second selected space in step B7 and the judgment step is terminated. On the other hand, if any of the first condition, second condition, third condition and fourth condition are not satisfied, the target to be the planned installation location is changed to the next priority and the same process is performed in the next step B8.

[0118] In step B8, the planned installation location is changed to a shoe closet and judged. In this step B8, as in step B1, the planned installation location is set to the shoe closet and the first confirmation step C21, second confirmation step C22, third confirmation step C23 and fourth confirmation step C24 shown in Fig. 14 are performed, and if the first condition, second condition, third condition and fourth condition are satisfied, the shoe closet is determined to be the second selected space in step B9 and the judgment step is terminated. On the other hand, if any of the first condition, second condition, third condition and fourth condition are not satisfied, the target to be the planned installation location is changed to the next priority and the same process is performed in the next step B10.

[0119] In step B10, the planned installation location is changed to a hallway and judged. In this step B10, similar to step B1, the planned installation location is set to a hallway and the first confirmation step C21, second confirmation step C22, third confirmation step C23, and fourth confirmation step C24 shown in Fig. 14 are performed, and if the first condition, second condition, third condition, and fourth condition are satisfied, the hallway is determined to be the second selected space in step B11, and the judgment step is terminated. On the other hand, if any of the first condition, second condition, third condition, and fourth condition is not satisfied, judgment of the planned installation location of the second exhaust port unit 72 on the first floor is continued.

[0120] (Decision on installation of second exhaust vent 72 on the first floor) In step B12, the planned installation location is changed to the washroom on the first floor and a judgment is made. In this step B12, similar to step B1, the planned installation location is set to the washroom on the first floor and a first confirmation step C21, a second confirmation step C22, a third confirmation step C23, and a fourth confirmation step C24 shown in Fig. 14 are performed. Then, the first confirmation step C21 for each room on the first floor is judged based on the first information, the second confirmation step C22 is judged based on the second information, the third confirmation step C23 is judged based on the sixth information (information regarding the living space portion in which the floor exhaust port portion 73 provided in the floor board 119 of the first living portion R1 is provided), and the fourth confirmation step C24 is judged based on the fourth information.

[0121] If the first, second, third and fourth conditions are met, the washroom on the first floor is determined as the second selected space in step B13, and the judgment process ends. On the other hand, if any of the first, second, third and fourth conditions is not met, the target to be the planned installation location is changed to the next priority and the same process is performed in step B14.

[0122] In step B14, the planned installation location is changed to a walk-in closet on the first floor and judged. In this step B14, as in step B12, the planned installation location is changed to a walk-in closet on the first floor, and the first confirmation step C21, the second confirmation step C22, the third confirmation step C23, and the fourth confirmation step C24 shown in Fig. 14 are performed, and if the first condition, the second condition, the third condition, and the fourth condition are satisfied, the walk-in closet on the first floor is determined to be the second selected space portion in step B15, and the judgment step is terminated. On the other hand, if any of the first condition, the second condition, the third condition, and the fourth condition are not satisfied, the target to be the planned installation location is changed to the next priority and the same process is performed in the next step B16.

[0123] In step B16, the planned installation location is changed to the shoe closet on the first floor and judged. In this step B16, as in step B12, the planned installation location is changed to the shoe closet on the first floor, and the first confirmation step C21, the second confirmation step C22, the third confirmation step C23, and the fourth confirmation step C24 shown in FIG. 14 are performed. If the first condition, the second condition, the third condition, and the fourth condition are satisfied, the shoe closet on the first floor is determined as the second selected space in step B17, and the judgment step is terminated. On the other hand, if any of the first condition, the second condition, the third condition, and the fourth condition are not satisfied, the corridor is determined as the second selected space in step B18. Note that, if the planned installation location of the second exhaust port part 72 is determined to be the shoe closet, the planned installation location of the second exhaust port part 72 may be set to the entrance adjacent to the shoe closet instead of the shoe closet.

[0124] By using the determination method shown in Figures 10 to 14, information regarding the locations to install the first exhaust port 71 and the second exhaust port 72 can be used during the work of installing the ventilation equipment in a house, particularly in the process of piping the first indoor exhaust duct 413 and the second indoor exhaust duct 414 between floors of the house. The method of attaching the exhaust port portion (first exhaust port portion 71 and second exhaust port portion 72) of the ventilation device 20, 20A to the house includes a first attachment step of attaching the first exhaust port portion 71 to a first selected space portion based on the layout of the house, and a second attachment step of attaching the second exhaust port portion 72 to a second selected space portion based on the layout of the house. For example, if the first selected space portion is the first habitable portion R1, the first exhaust port portion 71 is attached to the ceiling board 141 of the first selected space portion, and if the first selected space portion is the second habitable portion R2, the first exhaust port portion 71 is attached to the floor board 143 of the first selected space portion, and further, the upstream end portion of the first indoor exhaust duct 413 is connected to the first exhaust port portion 71. In addition, in the installation method of the ventilation device 20, 20A, for example, if the second selected space portion is the first living area R1, the second exhaust port portion 72 is attached to the ceiling board 141 of the second selected space portion, and if the second selected space portion is the second living area R2, the second exhaust port portion 72 is attached to the floor board 143 of the second selected space portion, and further, the upstream end of the second indoor exhaust duct 414 is connected to the second exhaust port portion 72.

[0125] As shown in Figures 10 to 14, by identifying a first selected space portion in which to install the first exhaust port portion 71 based on the layout of the house, and further identifying a second selected space portion in which to install the second exhaust port portion 72 based on the layout of the house, the house can be optimally ventilated.

[0126] In the house 10 of the first embodiment, the first chamber R3 is utilized as a flow path for exhausting indoor air (first exhaust chamber) and the second chamber R4 is utilized as a flow path for exhausting indoor air (second exhaust chamber), but the house can also be configured with one or both of these chambers as non-exhaust chambers that are not utilized as flow paths for indoor air.

[0127] When the first chamber R3 is not used as a flow path for exhausting indoor air, the floor panel 119 of the first living portion R1 may be provided with no floor exhaust port 73 leading from the first living portion R1 to the inside of the first chamber R3. Such a floor panel 119 may have a floor insulation structure by providing a heat insulating material on the hollow side of the first chamber R3. The heat insulating material may be made of, for example, glass wool.

[0128] When the second chamber R4 is not used as a flow path for exhausting indoor air, the ceiling exhaust port 74 leading from the second living area R2 to the inside of the second chamber R4 may be omitted from the ceiling board 131 of the second living area R2. Such a ceiling board 131 may have a ceiling insulation structure by providing a heat insulating material on the hollow side of the second chamber R4. The heat insulating material may be made of, for example, glass wool.

[0129] In the following, a house ventilation system will be described in which the first chamber R3 and / or the second chamber R4 are not utilized as a flow path for exhausting indoor air.

[0130] [Second embodiment] First, a house 10A to which a ventilation system 2 according to a second embodiment of the present invention is applied will be described with reference to the drawings. 15, the house 10A is two-story, similar to the house 10 of the first embodiment, and further includes a first living area R1, a second living area R2, a first chamber R3, a second chamber R4, and a third chamber R5. Furthermore, the house 10A is configured to be highly insulated, with the second chamber R4 not being used as a passage for exhausting indoor air from the second living area R2 by the ventilation device 20B installed in the house 10A, and with a ceiling insulation structure in which an insulation material 181 is provided on the hollow side of the second chamber R4 of the ceiling board 131 of the second living area R2, and a foundation insulation structure in which an insulation material 182 is provided from the base concrete 111 of the foundation 110 to the rising portion 112.

[0131] (Ventilation device 20B) Next, the ventilation device 20B installed in the house 10A will be described. As shown in FIG. 15, the ventilation device 20B is a supply airflow device through which outside air flows. Air30 and the exhaust through which indoor air flows. Air 40A and supply Air 30 and exhaust Air and a main body 50 that is provided in the middle of the exhaust pipe 40A and performs heat exchange and ventilation. Air Of the ducts 40A, the one disposed upstream of the main body 50 is referred to as an upstream exhaust duct 410A. The same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.

[0132] (Upstream exhaust duct 410A) The upstream exhaust duct 410A includes a first chamber exhaust duct 411 extending from inside the first chamber R3 to inside the third chamber R5, a first indoor exhaust duct 413 connected to a first exhaust port 71 provided on the floor board 143 of the second living area R2 and provided inside the third chamber R5, a second indoor exhaust duct 414 connected to a second exhaust port 72 provided on the floor board 143 of the second living area R2 and provided inside the third chamber R5, and a main body connection duct 415 whose downstream end is connected to a third connection part 543 of the main body part 50 and provided inside the third chamber R5. In FIG. 15, the upstream exhaust duct 410A is shown by a thinner line than the downstream exhaust duct 420, the upstream air supply duct 310, and the downstream air supply duct 320.

[0133] The first chamber exhaust duct 411, the first indoor exhaust duct 413, and the second indoor exhaust duct 414 are connected by a two-input, one-output type pipe joint shown in FIG. 4, and the merged indoor air flows toward the main body 50 through the main body connection duct 415. Specifically, the first indoor exhaust duct 413 is connected to one inlet connection 61A of the first pipe joint 610, and the second indoor exhaust duct 414 is connected to the other inlet connection 61B of the first pipe joint 610. The first chamber exhaust duct 411 is connected to one inlet connection 61A of the second pipe joint 620, and the outlet connection 62 of the first pipe joint 610 and the other inlet connection 61B of the second pipe joint 620 are connected by a first pipe member 417 that connects the joints. The outlet connection 62 of the second pipe joint 620 is connected to the main body 50 through the main body connection duct 415.

[0134] In the ventilation system 2, since the second chamber R4 is configured not to be utilized as a flow path for exhausting indoor air from the second living area R2 by the ventilation device 20B installed in the house 10A, it is desirable to provide the first exhaust port portion 71 and the second exhaust port portion 72 in the floor board 143 of the second living area R2.

[0135] In the ventilation system 2, the first exhaust port section 71 and the second exhaust port section 72 are preferably installed in any one of the dirty zone, WIC, corridor, hall, or humid room in the layout of the house.

[0136] A plurality of floor exhaust ports 73 are provided on the floorboard 119 of the first living area R1, and preferably some of these, for example at least two, are installed in any of the dirty zone, WIC, corridor, hall, and humid rooms. Furthermore, some of the plurality of floor exhaust ports 73 may be installed in rooms other than the dirty zone, WIC, corridor, hall, bathroom, and humid rooms, such as bedrooms, living rooms, and kitchens. For example, the number n11 of floor exhaust ports 73 in the first living area R1 that are installed in the dirty zone, WIC, corridor, hall, and humid rooms is set to be smaller than the number n12 of floor exhaust ports 73 in the first living area R1 that are installed in rooms such as bedrooms, living rooms, and kitchens (n11 <n12)。

[0137] A plurality of first air outlets 81 are provided on the ceiling panel 141 of the first living area R1, and are preferably installed in rooms such as bedrooms, living rooms, and kitchens other than the dirty zone, WIC, corridor, hall, bathroom, and humid rooms. In addition, both the first air outlets 81 and the floor exhaust port 73 may be provided in rooms such as bedrooms and living rooms.

[0138] A plurality of second air outlet sections 82 are provided on the floorboard 143 of the second living area R2, and are preferably installed in rooms such as bedrooms, living rooms, and kitchens other than dirty zones, WICs, corridors, halls, bathrooms, and humid rooms.

[0139] In the illustrated house 10A, the first exhaust port 71 is installed in the toilet of the second living area R2 as the first dirty zone dz1, and the floor exhaust port 73 is installed in the toilet of the first living area R1 as the second dirty zone dz2 separate from the first dirty zone dz1. (Third selection space) The other floor exhaust port 73 is installed in the washroom of the first dwelling portion R1 as the third dirty zone dz3 separate from the first dirty zone dz1 and the second dirty zone dz2. (Third selection space) The first exhaust port 71, the second exhaust port 72, and the floor exhaust port 73 are installed in a walk-in closet (WIC) of the second living area R2. In this case, as in the ventilation system 1 of the first embodiment, it is preferable to omit dedicated ventilation fans from the dirty zones dz1, dz2, and dz3 and the WIC in which the first exhaust port 71, the second exhaust port 72, and the floor exhaust port 73 are installed. Reference numerals 173, 174, and 175 in FIG. 15 denote partition walls.

[0140] In the first living area R1, the number of first air outlet portions 81 is fewer than the number of floor exhaust port portions 73, for example, three first air outlet portions 81 are provided, and six floor exhaust port portions 73 are provided. In the second living area R2, the number of second air outlet portions 82 is more than the total number of the first exhaust port portions 71 and the second exhaust port portions 72 (=2), for example, four second air outlet portions 82 are provided.

[0141] Depending on the layout of the house and the priority order of the rooms to be ventilated, one or both of the first exhaust port 71 and the second exhaust port 72 of the ventilation device 20B may be selected as the dirty zone of the first living area R1. When the first exhaust port 71 and the second exhaust port 72 are provided in the dirty zone of the first living area R1, the installation of a dedicated exhaust fan may be omitted in the dirty zone where the first exhaust port 71 and the second exhaust port 72 are provided, as in the ventilation system 1 of the first embodiment.

[0142] In addition, the house 10A, when completed with the ventilation system 2 installed, preferably has an equivalent gap area of ​​1.0 [cm 2 / m 2] is configured as follows. During the measurement test of the airtightness performance, the operation of the main body 50 of the ventilation device 20B and other ventilation fans (such as a kitchen range fan and a bathroom ventilation fan installed in the house) not shown is stopped, and the intake port 330 for drawing in outside air and the exhaust port 430 for discharging indoor air, which are provided in the exterior wall 160, and other ventilation fans (such as a kitchen range fan and a bathroom ventilation fan installed in the house) are sealed and closed. Furthermore, the floor exhaust port 73, the first air outlet 81, and the second air outlet 82 are each sealed, and the equivalent gap area is calculated without including the first chamber R3, the second chamber R4, and the third chamber R5 in the room.

[0143] In the second embodiment of the ventilation system 2, the main body 50 of the ventilation device 20B is housed in the third chamber R5, and the end 321 (air outlet) of the downstream air supply duct 320 is open into the third chamber R5, so that the inside of the third chamber R5 is filled with outside air and air can be suitably supplied to the first living area R1 and the second living area R2 from the first air outlet section 81 and the second air outlet section 82.

[0144] Moreover, in the ventilation system 2, the exhaust fan 530 can exhaust the indoor air to the outdoors through the following routes K1, K3, and K4. K1: A path that flows from the floor exhaust port 73 through the first chamber R3, the first chamber exhaust duct 411, the main body 50, and the downstream exhaust duct 420. K3: A path from the first exhaust port 71 through the first indoor exhaust duct 413 and the main body 50 to the downstream exhaust duct 420. K4: A path that flows from the second exhaust port 72 through the second indoor exhaust duct 414 and the main body 50 to the downstream exhaust duct 420. By using the ventilation device 20B, ventilation in the highly airtight and highly insulated house 10A can be performed suitably.

[0145] In this way, by using the third chamber R5 to supply air, Air The amount of gas used can be reduced. Also, by using the first chamber R3 for exhaust, Air This can reduce the amount of chemical used.

[0146] Furthermore, in the ventilation device 20B, compared to the ventilation device 20 of the first embodiment, the main body 50 has only three locations where indoor air is drawn in through the upstream exhaust duct 410A. Specifically, these are limited to the upstream end 411A of the first chamber exhaust duct 411, the first exhaust port 71 of the first indoor exhaust duct 413, and the second exhaust port 72 of the second indoor exhaust duct 414. Since these only need to be installed inside the first chamber R3 and on the floor board 143 of the second living area R2, installation work is easy.

[0147] On the other hand, in the ventilation system shown in Patent Document 1, a blower is installed at the end of an exhaust duct for exhausting air in the attic on the second floor, and a blower is installed at the end of an exhaust duct for exhausting air under the floor on the first floor, and wiring is also required to power the blower, making the installation work in the space under the floor and in the attic complicated. In addition, in Patent Document 2, the ventilation device and the air conditioner need to be connected with a duct, which may complicate the installation work of the ventilation device and the air conditioner, but since the ventilation device 20B in the ventilation system 2 is a device separate from the air conditioner, the installation work is easy.

[0148] Furthermore, in the whole-building air-conditioning system of Patent Document 3, the main body of the ventilation device and the air conditioner are installed between floors without being connected by a duct, and the air on the second floor is sucked into the main body through the floor space from the intake port provided in the floor panel (paragraph 0059 of Patent Document 3). However, this causes the outside air supplied to the floor space from the main body of the ventilation device to mix with the indoor air that enters the floor space from the intake port, and there are multiple outlets on the ceiling panel of the first floor and the floor panel of the second floor between the main body of the ventilation device, which is installed in the center of the building between the floors, and the intake port provided in the floor panel. Even if the indoor air flows into the floor space from the intake port, there is a risk that the indoor air that has entered the floor space will return to the living area from the outlet port before reaching the main body of the ventilation device. Furthermore, since the air between the floors enters the main body of the ventilation device and is exhausted to the outdoors, there is a risk that the outdoor air supplied to the floor space from the main body of the ventilation device will be exhausted by a shortcut. This does not allow the exhaust of indoor air and the supply of outdoor air to be performed appropriately. In contrast to Patent Document 3, in the ventilation system 2 of this embodiment, the third chamber R5 provided with the first air outlet 81 and the second air outlet 82 is used as the air supply flow path, and the indoor air is exhausted through the exhaust paths K1, K3, and K4 into the third chamber R5 filled with outside air without being mixed with the outside air, and further, since the main body 50 does not have an open suction port in the third chamber R5, the outside air supplied to the third chamber R5 is not exhausted through a shortcut. This allows for optimal simultaneous exhaust and air supply ventilation.

[0149] [Third embodiment] Next, a house 10B to which the ventilation system 3 of the third embodiment of the present invention is applied will be described with reference to Fig. 16. The house 10B is two-story, like the house 10 of the first embodiment, and includes a first living area R1, a second living area R2, a first chamber R3, a second chamber R4, and a third chamber R5. Furthermore, the house 10B is configured such that the first chamber R3 is not utilized as a flow path for exhausting indoor air from the first living area R1 by the ventilation device 20C installed in the house 10B, and is configured to be highly insulated by having a floor insulation structure in which a heat insulating material 183 is provided on the hollow side of the first chamber R3 of the floor board 119 of the first living area R1.

[0150] (Ventilation device 20C) The ventilation device 20C installed in the house 10B will be described. As shown in FIG. 16, the ventilation device 20C has a supply Air 30 and the exhaust through which indoor air flows. Air 40B and Air 30 and exhaust Air and a main body 50 that is provided in the middle of the exhaust pipe 40B and performs heat exchange and ventilation. Air Of the ducts 40B, the one disposed upstream of the main body 50 is referred to as an upstream exhaust duct 410B. The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

[0151] (Upstream exhaust duct 410B) The upstream exhaust duct 410B includes a second chamber exhaust duct 412 extending from inside the second chamber R4 to inside the third chamber R5, a first indoor exhaust duct 413 connected to a first exhaust port 71 provided in the ceiling board 141 of the first floor and provided inside the third chamber R5, a second indoor exhaust duct 414 connected to a second exhaust port 72 provided in the ceiling board 141 of the first floor and provided inside the third chamber R5, and a main body connection duct 415 whose downstream end is connected to a third connection part 543 of the main body part 50 and provided inside the third chamber R5. In FIG. 16, the upstream exhaust duct 410B is indicated by a thinner line than the downstream exhaust duct 420, the upstream air supply duct 310, and the downstream air supply duct 320.

[0152] The second chamber exhaust duct 412, the first indoor exhaust duct 413, and the second indoor exhaust duct 414 are connected by a two-input, one-output type pipe joint shown in FIG. 4, and the merged indoor air flows toward the main body 50 through the main body connection duct 415. Specifically, the first indoor exhaust duct 413 is connected to one inlet connection 61A of the first pipe joint 610, and the second indoor exhaust duct 414 is connected to the other inlet connection 61B of the first pipe joint 610. The second chamber exhaust duct 412 is connected to one inlet connection 61A of the second pipe joint 620, and the outlet connection 62 of the first pipe joint 610 and the other inlet connection 61B of the second pipe joint 620 are connected by a first pipe member 417 that connects the joints. The outlet connection 62 of the second pipe joint 620 is connected to the main body 50 through the main body connection duct 415.

[0153] In the ventilation system 3, since the first chamber R3 is configured not to be utilized as a flow path for exhausting indoor air from the first living area R1 by the ventilation device 20C installed in the house 10B, it is desirable to provide the first exhaust port portion 71 and the second exhaust port portion 72 in the ceiling panel 141 of the first living area R1.

[0154] In the ventilation system 3, the first exhaust port portion 71 and the second exhaust port portion 72 are preferably installed in any one of the dirty zone, WIC, corridor, hall, or humid room in the layout of the house.

[0155] A plurality of ceiling exhaust vents 74 are provided on the ceiling panel 131 of the second living area R2, and preferably some of these, for example at least two, are installed in any of the dirty zone, WIC, corridor, hall, and humid rooms. In addition, some of the other ceiling exhaust vents 74 may be installed in rooms other than the dirty zone, WIC, corridor, hall, bathroom, and humid room, such as a bedroom, living room, and kitchen.

[0156] A plurality of first air outlet sections 81 are provided on the ceiling panel 141 of the first living area R1, and are preferably installed in rooms such as bedrooms, living rooms, and kitchens other than dirty zones, WICs, corridors, halls, bathrooms, and humid rooms.

[0157] A plurality of second air outlets 82 are provided on the floorboard 143 of the second living area R2, and are preferably installed in rooms such as bedrooms, living rooms, and kitchens other than the dirty zone, WIC, corridor, hall, bathroom, and humid rooms. In addition, both the second air outlets 82 and the ceiling exhaust port 74 may be provided in rooms such as bedrooms and living rooms.

[0158] In the illustrated house 10B, the first exhaust port 71 is installed in a toilet in the first living area R1 as a first dirty zone dz1, the second exhaust port 72 is installed in a washroom in the first living area R1 as a second dirty zone dz2 separate from the first dirty zone dz1, and the ceiling exhaust port 74 is installed in a toilet in the second living area R2 as a third dirty zone dz3 separate from the first dirty zone dz1 and the second dirty zone dz2. (Fourth Selection Space) Another ceiling exhaust port 74 is installed in the WIC of the second living area R2. As with the ventilation system 1 of the first embodiment, the ventilation system 3 may also omit the installation of dedicated ventilation fans in the dirty zones dz1, dz2, and dz3 and the WIC in which the first exhaust port 71, the second exhaust port 72, and the ceiling exhaust port 74 are provided.

[0159] In the first living area R1, the number of first air outlet portions 81 provided is greater than the total number (=2) of the first exhaust port portions 71 and the second exhaust port portions 72; for example, four first air outlet portions 81 are provided. In the second living area R2, the number of second air outlets 82 provided is fewer than the number of ceiling exhaust ports 74 provided; for example, three second air outlets 82 are provided and five ceiling exhaust ports 74 are provided.

[0160] Although not shown in the drawings, depending on the layout of the house and the priority order of the rooms to be ventilated, one or both of the first exhaust port 71 and the second exhaust port 72 of the ventilation device 20C may be selected as the dirty zone of the second living area R2. When the first exhaust port 71 and the second exhaust port 72 are provided in the dirty zone of the second living area R2, the installation of a dedicated exhaust fan may be omitted in the dirty zone where the first exhaust port 71 and the second exhaust port 72 are provided, as in the ventilation system 1 of the first embodiment.

[0161] In addition, the house 10B, when completed with the ventilation system 3 installed, preferably has an equivalent gap area of ​​1.0 [cm 2 / m 2 ] is configured as follows. During the measurement test of airtightness performance, the operation of main body 50 of ventilation device 20C and other ventilation fans (such as a kitchen range fan and a bathroom ventilation fan installed in the house) not shown is stopped, and air inlet 330 provided on the exterior wall for drawing in outside air, air outlet 430 for discharging indoor air, and other ventilation fans (such as a kitchen range fan and a bathroom ventilation fan installed in the house) are sealed and closed. Furthermore, ceiling exhaust port 74, first air outlet 81, and second air outlet 82 are each sealed, and the equivalent gap area is calculated without including first chamber R3, second chamber R4, and third chamber R5 in the room.

[0162] In the third embodiment of the ventilation system 3, the main body 50 of the ventilation device 20C is housed in the third chamber R5, and the end 321 (air outlet) of the downstream air supply duct 320 is open into the third chamber R5, so that the inside of the third chamber R5 is filled with outside air and air can be suitably supplied to the first living area R1 and the second living area R2 from the first air outlet section 81 and the second air outlet section 82.

[0163] Moreover, in the ventilation system 3, the exhaust fan 530 can exhaust the indoor air to the outdoors through the following routes K2, K3, and K4. K2: A path that flows from the ceiling exhaust port 74 through the second chamber R4, the second chamber exhaust duct 412, the main body 50, and the downstream exhaust duct 420. K3: A path from the first exhaust port 71 through the first indoor exhaust duct 413 and the main body 50 to the downstream exhaust duct 420. K4: A path that flows from the second exhaust port 72 through the second indoor exhaust duct 414 and the main body 50 to the downstream exhaust duct 420. By using the ventilation device 20C, ventilation in the highly airtight and highly insulated house 10B can be performed suitably.

[0164] In this way, by using the third chamber R5 to supply air, Air The amount of gas used can be reduced. Also, by using the second chamber R4 for exhaust, the exhaust Air This can reduce the amount of chemical used.

[0165] Furthermore, in the ventilation device 20C, compared to the ventilation device 20 of the first embodiment, the main body 50 has only three locations where indoor air is drawn in through the upstream exhaust duct 410B. Specifically, these are limited to the upstream end 412A of the second chamber exhaust duct 412, the first exhaust port 71 of the first indoor exhaust duct 413, and the second exhaust port 72 of the second indoor exhaust duct 414. Since these only need to be installed inside the second chamber R4 and on the floor board 143 of the second living area R2, installation work is easy.

[0166] On the other hand, in the ventilation system shown in Patent Document 1, a blower is installed at the end of an exhaust duct for exhausting air in the attic on the second floor, and a blower is installed at the end of an exhaust duct for exhausting air under the floor on the first floor, and wiring is also required to power the blower, making the installation work in the space under the floor and in the attic complicated. Furthermore, in Patent Document 2, the installation of the ventilation device and the air conditioner needs to be performed using a duct, which may complicate the installation process. However, since the ventilation device 20C in the ventilation system 3 is a device separate from the air conditioner, the installation process is easy.

[0167] Furthermore, in the whole-building air-conditioning system of Patent Document 3, the main body of the ventilation device and the air conditioner are installed between floors without being connected by a duct, and the air on the second floor is sucked into the main body through the floor space from the intake port provided in the floor panel (paragraph 0059 of Patent Document 3). However, this causes the outside air supplied to the floor space from the main body of the ventilation device to mix with the indoor air that enters the floor space from the intake port, and there are multiple outlets on the ceiling panel of the first floor and the floor panel of the second floor between the main body of the ventilation device, which is installed in the center of the building between the floors, and the intake port provided in the floor panel. Even if the indoor air flows into the floor space from the intake port, there is a risk that the indoor air that has entered the floor space will return to the living area from the outlet port before reaching the main body of the ventilation device. Furthermore, since the air between the floors enters the main body of the ventilation device and is exhausted to the outdoors, there is a risk that the outdoor air supplied to the floor space from the main body of the ventilation device will be exhausted by a shortcut. This does not allow the exhaust of indoor air and the supply of outdoor air to be performed appropriately. In contrast to Patent Document 3, in the ventilation system 3 of this embodiment, the third chamber R5 provided with the first air outlet 81 and the second air outlet 82 is used as the air supply flow path, and the indoor air is exhausted through the exhaust paths K2, K3, and K4 into the third chamber R5 filled with outside air without being mixed with the outside air, and further, since the main body 50 does not have an open suction port in the third chamber R5, the outside air supplied to the third chamber R5 is not exhausted through a shortcut. This allows for optimal simultaneous exhaust and air supply ventilation.

[0168] [Fourth embodiment] A house 10C to which the ventilation system 4 of the fourth embodiment of the present invention is applied will be described with reference to FIG. 17. The house 10C is a two-story house, like the house 10 of the first embodiment, and includes a first living area R1, a second living area R2, a first chamber R3, a second chamber R4, and a third chamber R5. In addition, the house 10C has a ceiling insulation structure in which a heat insulating material 181 is provided on the hollow side of the second chamber R4 of the ceiling board 131 of the second living area R2, and a floor insulation structure in which a heat insulating material 183 is provided on the hollow side of the first chamber R3 of the floor board 119 of the first living area R1, in addition to the first chamber R3 being configured not to be used as a flow path for exhausting the indoor air of the first living area R1 by the ventilation device 20D installed in the house 10C and the second chamber R4 being configured not to be used as a flow path for exhausting the indoor air of the second living area R2 by the ventilation device 20D, and is configured to be highly insulated.

[0169] (Ventilation device 20D) Next, the ventilation device 20D installed in the house 10C will be described. As shown in FIG. 17, the ventilation device 20D is a supply airflow device through which outside air flows. Air 30 and the exhaust through which indoor air flows. Air 40C and Air 30 and exhaust Air and a main body 50 that is provided in the middle of the exhaust pipe 40C and performs heat exchange and ventilation. Air Of the ducts 40C, the one disposed upstream of the main body 50 is referred to as an upstream exhaust duct 410C. The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

[0170] (Upstream exhaust duct 410C) The upstream exhaust duct 410C includes a first indoor exhaust duct 413 connected to a first exhaust port 71 provided in the ceiling panel 141 of the first living portion R1 and provided inside the third chamber R5, a second indoor exhaust duct 414 connected to a second exhaust port 72 provided in the ceiling panel 141 of the first living portion R1 and provided inside the third chamber R5, a third indoor exhaust duct 419A connected to a third exhaust port 76 provided in the floor panel 143 of the second living portion R2 and provided inside the third chamber R5, a fourth indoor exhaust duct 419B connected to a fourth exhaust port 77 provided in the floor panel 143 of the second living portion R2 and provided inside the third chamber R5, and a main body connection duct 415 whose downstream end is connected to the third connection portion 543 of the main body portion 50 and provided inside the third chamber R5. 17, the upstream exhaust duct 410C is shown with a thinner line than the downstream exhaust duct 420, the upstream air supply duct 310, and the downstream air supply duct 320. The third exhaust port 76 and the fourth exhaust port 77 are not limited in structure to the first exhaust port 71 and the second exhaust port 72, but may include, for example, a hollow, box-shaped exhaust port main body with an opening toward the top, and a cover material (so-called louver) with multiple air holes attached to the opening of the exhaust port main body, and a connection part for connecting a duct is provided on the exhaust port main body. The first exhaust port 71, the third exhaust port 76, and the like may include an elbow.

[0171] The first indoor exhaust duct 413, the second indoor exhaust duct 414, the third indoor exhaust duct 419A, and the fourth indoor exhaust duct 419B are connected by a two-input, one-output type pipe joint shown in Fig. 4, and the merged indoor air flows toward the main body 50 through the main body connection duct 415. Specifically, the first indoor exhaust duct 413 is connected to one inlet connection part 61A of the first pipe joint 610, and the second indoor exhaust duct 414 is connected to the other inlet connection part 61B of the first pipe joint 610. Furthermore, the third indoor exhaust duct 419A is connected to one inlet connection part 61A of the second pipe joint 620, and the fourth indoor exhaust duct 419B is connected to the other inlet connection part 61B of the second pipe joint 620. Furthermore, the outflow connection portion 62 of the first pipe fitting 610 is connected to one inflow connection portion 61A of the third pipe fitting 630 via a first pipe material 417, and the outflow connection portion 62 of the second pipe fitting 620 is connected to the other inflow connection portion 61B of the third pipe fitting 620 via a second pipe material 418. Furthermore, the outflow connection portion 62 of the third pipe fitting 630 is connected to the main body 50 via a main body connecting duct 415. The inner diameters of the ducts constituting the upstream exhaust duct 410C are not limited to being all the same size, but in this embodiment, it is assumed that each duct has the same inner diameter φ.

[0172] In the ventilation system 4, since the first chamber R3 is configured not to be utilized as a flow path for exhausting indoor air from the first living area R1 by the ventilation device 20D installed in the house 10C, it is preferable that the first exhaust port 71 and the second exhaust port 72 are provided in the ceiling panel 141 of the first living area R1, and since the second chamber R4 is configured not to be utilized as a flow path for exhausting indoor air from the second living area R2 by the ventilation device 20D installed in the house 10C, it is preferable that the third exhaust port 76 and the fourth exhaust port 77 are provided in the floor panel 143 of the second living area R2. These first exhaust port 71, second exhaust port 72, third exhaust port 76 and fourth exhaust port 77 are preferably installed in the dirty zone, WIC, corridor, hall or humid room in the layout of the house.

[0173] A plurality of first air outlet sections 81 are provided on the ceiling panel 141 of the first living area R1, and are preferably installed in rooms such as bedrooms, living rooms, and kitchens other than dirty zones, WICs, corridors, halls, bathrooms, and humid rooms.

[0174] A plurality of second air outlet sections 82 are provided on the floorboard 143 of the second living area R2, and are preferably installed in rooms such as bedrooms, living rooms, and kitchens other than dirty zones, WICs, corridors, halls, bathrooms, and humid rooms.

[0175] In the illustrated house 10C, the first exhaust port 71 is installed in the toilet of the first living area R1 as the first dirty zone dz1, the second exhaust port 72 is installed in the washroom of the first living area R1 as the second dirty zone dz2 separate from the first dirty zone dz1, the third exhaust port 76 is installed in the toilet of the second living area R2 as the third dirty zone dz3 separate from the first dirty zone dz1 and the second dirty zone dz2, and the fourth exhaust port 77 is installed in the WIC of the second living area R2. In this case, as in the ventilation system 1 of the first embodiment, the installation of a dedicated exhaust fan may be omitted for each dirty zone or WIC where the first exhaust port 71, the second exhaust port 72, the third exhaust port 76, and the fourth exhaust port 77 are provided.

[0176] In the first living portion R1, the first air outlet portions 81 are provided in greater number than the total number (=2) of the first exhaust port portions 71 and the second exhaust port portions 72 provided in the ceiling panel 141 of the first living portion R1, for example, four first air outlet portions 81 are provided. In the second living portion R2, the second air outlet portions 82 are provided in greater number than the total number (=2) of the third exhaust port portions 76 and the fourth exhaust port portions 77 provided in the floor panel 143 of the second living portion R2, for example, four second air outlet portions 82 are provided. Although not shown in the figures, depending on the layout of the house 10C and the priority order of the rooms to be exhausted, it is also possible to install all four of the ventilation device 20D, the first exhaust port 71, the second exhaust port 72, the third exhaust port 76, and the fourth exhaust port 77, on the ceiling board 141 of the first living area R1 or on the floor board 143 of the second living area R2, or to install three or one on the ceiling board 141 of the first living area R1 and the remaining on the floor board 143 of the second living area R2. In this case, it is also preferable to install them in different dirty zones, etc.

[0177] In addition, the house 10C, when completed with the ventilation system 4 installed, preferably has an equivalent gap area of ​​1.0 [cm 2 / m 2 ] is configured as follows. During the measurement test of airtightness performance, the operation of main body 50 of ventilation device 20D and other ventilation fans (such as a kitchen range fan and a bathroom ventilation fan installed in the house) not shown is stopped, and air inlet 330 provided on the exterior wall for drawing in outside air, air outlet 430 for discharging indoor air, and other ventilation fans (such as a kitchen range fan and a bathroom ventilation fan installed in the house) are sealed and closed. Furthermore, first air outlet 81 and second air outlet 82 are each sealed, and the equivalent gap area is calculated without including first chamber R3, second chamber R4, and third chamber R5 in the room.

[0178] In the fourth embodiment of the ventilation system 4, the main body 50 of the ventilation device 20D is housed in the third chamber R5, and the end 321 (air outlet) of the downstream air supply duct 320 is open into the third chamber R5, so that the inside of the third chamber R5 is filled with outside air and air can be suitably supplied to the first living area R1 and the second living area R2 from the first air outlet section 81 and the second air outlet section 82.

[0179] Moreover, in the ventilation system 4, the exhaust fan 530 can exhaust the indoor air to the outdoors through the following routes K3, K4, K5, and K6. K3: A path from the first exhaust port 71 through the first indoor exhaust duct 413 and the main body 50 to the downstream exhaust duct 420. K4: A path that flows from the second exhaust port 72 through the second indoor exhaust duct 414 and the main body 50 to the downstream exhaust duct 420. K5: A path from the third exhaust port 76 through the third indoor exhaust duct 419A and the main body 50 to the downstream exhaust duct 420. K6: A path that flows from the fourth exhaust port 77 through the fourth indoor exhaust duct 419B and the main body 50 to the downstream exhaust duct 420. By using the ventilation device 20D, ventilation in the highly airtight and highly insulated house 10C can be performed suitably.

[0180] In this way, by using the third chamber R5 to supply air, Air This can reduce the amount of chemical used.

[0181] Moreover, in the ventilation device 20D, the four locations where the main body 50 draws in indoor air through the upstream exhaust duct 410C, specifically the first exhaust port 71 of the first indoor exhaust duct 413, the second exhaust port 72 of the second indoor exhaust duct 414, the third exhaust port 76 of the third indoor exhaust duct 419A, and the fourth exhaust port 77 of the fourth indoor exhaust duct 419B, are all provided on the ceiling board 141 or the floor board 143 constituting the third chamber R5, and piping from the third chamber R5 to the first chamber R3 and piping from the third chamber R5 to the second chamber R4 are not required, so that complicated work can be omitted compared to the ventilation device 20 of the first embodiment. Also, material costs can be reduced.

[0182] On the other hand, in the ventilation system shown in Patent Document 1, a blower is installed at the end of an exhaust duct for exhausting air in the attic on the second floor, and a blower is installed at the end of an exhaust duct for exhausting air under the floor on the first floor, and wiring is also required to power the blower, making the installation work in the space under the floor and in the attic complicated. In addition, in Patent Document 2, the ventilation device and the air conditioner need to be connected with a duct, which may complicate the installation work of the ventilation device and the air conditioner, but the ventilation device 20D in the ventilation system 4 is a device separate from the air conditioner, so the installation work is easy.

[0183] Furthermore, in the whole-building air-conditioning system of Patent Document 3, the main body of the ventilation device and the air conditioner are installed between floors without being connected by a duct, and the air on the second floor is sucked into the main body through the floor space from the intake port provided in the floor panel (paragraph 0059 of Patent Document 3). However, this causes the outside air supplied to the floor space from the main body of the ventilation device to mix with the indoor air that enters the floor space from the intake port, and there are multiple outlets on the ceiling panel of the first floor and the floor panel of the second floor between the main body of the ventilation device, which is installed in the center of the building between the floors, and the intake port provided in the floor panel. Even if the indoor air flows into the floor space from the intake port, there is a risk that the indoor air that has entered the floor space will return to the living area from the outlet port before reaching the main body of the ventilation device. Furthermore, since the air between the floors enters the main body of the ventilation device and is exhausted to the outdoors, there is a risk that the outdoor air supplied to the floor space from the main body of the ventilation device will be exhausted by a shortcut. This does not allow the exhaust of indoor air and the supply of outdoor air to be performed appropriately. In contrast to Patent Document 3, in the ventilation system 4 of this embodiment, the third chamber R5 provided with the first air outlet 81 and the second air outlet 82 is used as the air supply flow path, and the indoor air is exhausted through the exhaust paths K3, K4, K5, and K6 into the third chamber R5 filled with outside air without being mixed with the outside air, and further, since the main body 50 does not have an open suction port in the third chamber R5, the outside air supplied to the third chamber R5 is not exhausted through a shortcut. This allows for optimal simultaneous exhaust and air supply ventilation.

[0184] If the ventilation device is configured by omitting one or both of the first indoor exhaust duct 413 connected to the first exhaust port 71 provided in the ceiling panel of the first living portion R1 or the floor panel of the second living portion R2, and the second indoor exhaust duct 414 connected to the second exhaust port 72 provided in the ceiling panel of the first living portion R1 or the floor panel of the second living portion R2, the cost of the ventilation device itself can be further reduced compared to the ventilation device 20 shown in Figure 2 and the ventilation device 20A shown in Figure 9.

[0185] [Fifth embodiment] A ventilation system 5 according to a fifth embodiment of the present invention will be described below with reference to FIG. The ventilation system 5 includes a ventilation device 20E installed in the house 10D. Compared with the above-mentioned ventilation devices 20 and 20A, the ventilation device 20E has a smaller exhaust temperature. Air The ventilator 40D is the exhaust of the ventilation device 20, 20A. Air Specifically, the upstream exhaust duct 410D of the ventilation device 20E is different from the upstream exhaust duct 410 of the ventilation devices 20 and 20A, and the upstream exhaust duct 410D does not include the first indoor exhaust duct 413 and the second indoor exhaust duct 414, but includes a first chamber exhaust duct 411, a second chamber exhaust duct 412, and a main body connection duct 415. The same components as those in the first embodiment are denoted by the same reference numerals, and their description will be omitted. In FIG. 18, the upstream exhaust duct 410D is indicated by a thinner line than the downstream exhaust duct 420, the upstream air supply duct 310, and the downstream air supply duct 320.

[0186] The first chamber exhaust duct 411 extends from the inside of the third chamber R5 to the inside of the first chamber R3, similar to the above-mentioned ventilation devices 20 and 20A, and an end 411A is provided as an inlet in the inside of the first chamber R3. The second chamber exhaust duct 412 also extends from the inside of the third chamber R5 to the inside of the second chamber R4, similar to the above-mentioned ventilation devices 20 and 20A, and an end 412A is provided as an inlet in the inside of the second chamber R4. The first chamber exhaust duct 411 and the second chamber exhaust duct 412 are connected to the main body 50 via a pipe joint 600, which is a so-called Y branch, and a main body connection duct 415. Specifically, the first chamber exhaust duct 411 is connected to one inlet connection part 61A of a pipe fitting 600 provided in the third chamber R5, the second chamber exhaust duct 412 is connected to the other inlet connection part 61B of the pipe fitting 600, the upstream end of the main body connection duct 415 is connected to the outlet connection part 62 of the pipe fitting 600, and the downstream end of the main body connection duct 415 is connected to the third connection part 543 of the main body part 50.

[0187] In ventilation device 20E, the upstream side of upstream exhaust duct 410D branches into two, and the exhaust volume per unit time of each of first chamber exhaust duct 411 and second chamber exhaust duct 412 is not limited, but for example, the proportion of each of them to the total exhaust volume per unit time in ventilation device 20E is set to 50%.

[0188] The house 10D of the ventilation system 5 is two-story, similar to the house 10 of the first embodiment, and includes a first living area R1, a second living area R2, a first chamber R3, a second chamber R4, and a third chamber R5. In the ventilation system 5, the first chamber R3, the second chamber R4, and the third chamber R5, which are highly airtight against the outside, work together with the ventilation device 20E to perform ventilation.

[0189] In addition, the ventilation system 5 is characterized in that the first exhaust port 71, the second exhaust port 72, the third exhaust port 76, and the fourth exhaust port 77 are not provided in the first living area R1 and the second living area R2, and is configured to draw indoor air in the first living area R1 into the first chamber R3 and draw indoor air in the second living area R2 into the second chamber R4.

[0190] A plurality of floor exhaust ports 73 are provided on the floorboard 119 of the first living area R1, and preferably some of these, for example at least two, are installed in any of the dirty zone, WIC, corridor, hall, and humid rooms. Furthermore, some of the plurality of floor exhaust ports 73 may be installed in rooms other than the dirty zone, WIC, corridor, hall, bathroom, and humid rooms, such as bedrooms, living rooms, and kitchens. For example, the number n11 of floor exhaust ports 73 in the first living area R1 that are installed in the dirty zone, WIC, corridor, hall, and humid rooms is set to be smaller than the number n12 of floor exhaust ports 73 in the first living area R1 that are installed in rooms such as bedrooms, living rooms, and kitchens (n11 <n12)。

[0191] A plurality of ceiling exhaust vents 74 are provided on the ceiling panel 131 of the second living area R2, and preferably some of these, for example at least two, are installed in any of the dirty zone, WIC, corridor, hall, and humid rooms. Furthermore, some of the plurality of ceiling exhaust vents 74 may be installed in rooms other than the dirty zone, WIC, corridor, hall, bathroom, and humid rooms, such as bedrooms, living rooms, and kitchens. The dirty zone, WIC, corridor, and hall in which the floor exhaust vents 73 and ceiling exhaust vents 74 are provided , damp In rooms with a lot of air, the installation of a dedicated ventilation fan may be omitted.

[0192] A plurality of first air outlets 81 are provided on the ceiling panel 141 of the first living area R1, and are preferably installed in rooms such as bedrooms, living rooms, and kitchens excluding dirty zones, walk-in closets, corridors, halls, bathrooms, and humid rooms. In addition, both the first air outlets 81 and the floor exhaust port 73 may be provided in rooms such as bedrooms, living rooms, and kitchens.

[0193] A plurality of second air outlet portions 82 are provided in the floor board 143 of the second living portion R2, and are preferably installed in rooms such as bedrooms, living rooms, kitchens, etc., other than the dirty zone, WIC, corridors, halls, bathrooms, and rooms with a lot of moisture. In addition, both the second air outlet portion 82 and the ceiling exhaust port portion 74 may be provided in rooms such as bedrooms and living rooms.

[0194] In the first living portion R1, the number of first air outlet portions 81 is provided less than that of the floor exhaust port portion 73. For example, three first air outlet portions 81 are provided, and six floor exhaust port portions 73 are provided. In the second living portion R2, the number of second air outlet portions 82 is provided less than that of the ceiling exhaust port portion 74. For example, three second air outlet portions 82 are provided, and five ceiling exhaust port portions 74 are provided.

[0195] In addition, when the ventilation system 5 is installed in the house 10D and is in a completed state, preferably, the equivalent gap area is 1.0 [cm 2 / m 2 is configured as follows. During the measurement test of the airtight performance, the operation of the main body portion 50 of the ventilation device 20E and other ventilation fans (such as the kitchen range fan and the bathroom ventilation fan provided in the house) not shown in the figure is stopped, and the suction port portion 330 that sucks outside air provided on the outer wall, the discharge port portion 430 that discharges indoor air, and other ventilation fans (such as the kitchen range fan and the bathroom ventilation fan provided in the house) are covered and closed. Further, the floor exhaust port portion 73, the ceiling exhaust port portion 74, the first air outlet portion 81, and the second air outlet portion 82 are each covered, and the first chamber R3, the second chamber R4, and the third chamber R5 are not included in the room, and the equivalent gap area is obtained.

[0196] The supply air of the ventilation system 5 is sent from the suction port portion 330 to the inside of the main body portion 50 through the upstream supply air duct 310 by the supply air blower 520 of the main body portion 50 shown in FIG. 3. The outside air exchanges heat with the exhausted indoor air by passing through the heat exchanger 510 in the main body portion 50. The outside air that has undergone heat exchange is sent to the downstream supply air duct 320 by the supply air blower 520 and blows out into the third chamber R5 from the end portion 321 (air outlet) of the downstream supply air duct 320.

[0197] As outside air continues to flow into the third chamber R5 by the supply air blower 520, the inside of the third chamber R5 is filled with outside air, and the excess outside air is blown out and supplied to the first living portion R1 from a plurality of first air outlets 81 provided in the ceiling board 141 of the first living portion R1. Also, the outside air in the third chamber R5 is blown out and supplied to the second living portion R2 from a plurality of second air outlets 82 provided in the floor board 143 of the second living portion R2.

[0198] The exhaust of the ventilation system 5 is performed by the exhaust blower 530 of the main body 50, in which the air in the first chamber R3 enters the end 411A (inlet) of the first chamber exhaust duct 411 and is sent to the main body 50. As the air in the first chamber R3 continues to be sent to the main body 50, and as air is supplied to the first living space R1, the indoor air of the first living space R1 flows into the first chamber R3 from the multiple floor exhaust ports 73 of the floor board 119.

[0199] The exhaust fan 530 of the main body 50 causes the air in the second chamber R4 to enter the end 412A (inlet) of the second chamber exhaust duct 412 and be sent to the main body 50. As the air in the second chamber R4 continues to be sent to the main body 50, and as air is supplied to the second living area R2, the indoor air of the second living area R2 flows into the second chamber R4 from the multiple ceiling exhaust ports 74 of the ceiling panel 131.

[0200] The indoor air flowing through the first chamber exhaust duct 411 and the second chamber exhaust duct 412 join at the pipe joint 600, and then flows through the main body connection duct 415 and enters the main body 50. After exchanging heat with the outside air, the indoor air passes through the downstream exhaust duct 420 and is exhausted to the outdoors from the exhaust port 430. In this manner, in the ventilation system 5, the exhaust fan 530 of the ventilation device 20E exhausts indoor air to the outdoors via the following routes K1 and K2. K1: A path that flows from the floor exhaust port 73 through the first chamber R3, the first chamber exhaust duct 411, the main body 50, and the downstream exhaust duct 420. K2: A path that flows from the ceiling exhaust port 74 through the second chamber R4, the second chamber exhaust duct 412, the main body 50, and the downstream exhaust duct 420.

[0201] In the ventilation device 20E, since it is only necessary to provide the upstream end 411A of the first chamber exhaust duct 411 in the first chamber R3 in order to exhaust the air from the first chamber R3, the installation work is easy. It is also easy to provide the upstream end 412A of the second chamber exhaust duct 412 in the second chamber R4 in order to exhaust the air from the second chamber R4.

[0202] On the other hand, in the ventilation system shown in Patent Document 1, a blower is installed at the end of an exhaust duct for exhausting air in the attic on the second floor, and a blower is installed at the end of an exhaust duct for exhausting air under the floor on the first floor, and wiring is also required to power the blower, making the installation work in the space under the floor and in the attic complicated. In addition, in Patent Document 2, the ventilation device and the air conditioner need to be connected with a duct, which may complicate the installation work of the ventilation device and the air conditioner, but since the ventilation device 20E in the ventilation system 5 is a device separate from the air conditioner, the installation work is easy.

[0203] Furthermore, in the whole-building air-conditioning system of Patent Document 3, the main body of the ventilation device and the air conditioner are installed between floors without being connected by a duct, and the air on the second floor is sucked into the main body through the floor space from the intake port provided in the floor panel (paragraph 0059 of Patent Document 3). However, this causes the outside air supplied to the floor space from the main body of the ventilation device to mix with the indoor air that enters the floor space from the intake port, and there are multiple outlets on the ceiling panel of the first floor and the floor panel of the second floor between the main body of the ventilation device, which is installed in the center of the building between the floors, and the intake port provided in the floor panel. Even if the indoor air flows into the floor space from the intake port, there is a risk that the indoor air that has entered the floor space will return to the living area from the outlet port before reaching the main body of the ventilation device. Furthermore, since the air between the floors enters the main body of the ventilation device and is exhausted to the outdoors, there is a risk that the outdoor air supplied to the floor space from the main body of the ventilation device will be exhausted by a shortcut. This does not allow the exhaust of indoor air and the supply of outdoor air to be performed appropriately. In contrast to Patent Document 3, in the ventilation system 5 of this embodiment, the third chamber R5 provided with the first air outlet 81 and the second air outlet 82 is used as the air supply passage, and the exhaust paths K1 and K2 are passed through the third chamber R5 filled with outside air. Furthermore, indoor air is not sucked into the third chamber R5 from the ceiling board 141 of the first living area R1 or the floor board 143 of the second living area R2, so that the indoor air in the third chamber R5 is exhausted without mixing with the outside air, and further, the main body 50 does not have an open intake port in the third chamber R5, so that the outside air supplied to the third chamber R5 is not exhausted by a shortcut. This allows for optimal ventilation by exhausting and supplying air at the same time.

[0204] [Modification of the fifth embodiment] A ventilation system 5A according to a modification of the fifth embodiment of the present invention shown in FIG. 19 includes a ventilation device 20E′ installed in a house 10D′. Compared with the above-described ventilation device 20E, the ventilation device 20E′ has an exhaust gas pressure of 1000 psi. Air The ventilator 40D' is the exhaust of the ventilator 20E. AirSpecifically, the upstream exhaust duct 410D' of the ventilation device 20E' is different from the upstream exhaust duct 410D of the ventilation device 20E, and the upstream exhaust duct 410D' includes a first exhaust port 71 and a first indoor exhaust duct 413 connected to the first exhaust port 71 at its upstream end. The same components as those in the first and fifth embodiments are denoted by the same reference numerals and will not be described. In FIG. 19, the upstream exhaust duct 410D' is indicated by a thinner line than the downstream exhaust duct 420, the upstream air supply duct 310, and the downstream air supply duct 320.

[0205] Specifically, the first chamber exhaust duct 411, the second chamber exhaust duct 412, and the first indoor exhaust duct 413 are connected in such a way that the second chamber exhaust duct 412 is connected to one inlet connection part 61A of the first pipe fitting 610, and the first indoor exhaust duct 413 is connected to the other inlet connection part 61B of the first pipe fitting 610, and the indoor air from the second chamber R4 and the indoor air from the second living area R2 merge together.

[0206] The first chamber exhaust duct 411 is connected to one inlet connection 61A of the second pipe fitting 620, and the outlet connection 62 of the first pipe fitting 610 and the other inlet connection 61B of the second pipe fitting 620 are connected by a first pipe member 417 that connects the fittings. The air that joins at the second pipe fitting 620 is sent into the main body 50 via the main body connection duct 415.

[0207] In the ventilation system 5A, the first exhaust port portion 71 is preferably installed in any one of the dirty zone, WIC, corridor, hall, and humid room in the layout of the house.

[0208] A plurality of floor exhaust ports 73 are provided on the floorboard 119 of the first living area R1, and preferably some of these are provided in the dirty zone, WIC, corridor, hall, or humid room, and more preferably at least two are provided in the dirty zone. Some of the plurality of floor exhaust ports 73 may be provided in rooms other than the dirty zone, WIC, corridor, hall, bathroom, or humid room, such as a bedroom, living room, or kitchen. For example, the number n11 of floor exhaust ports 73 provided in the dirty zone, WIC, corridor, hall, or humid room in the first living area R1 is set to be smaller than the number n12 of floor exhaust ports 73 provided in rooms such as a bedroom, living room, or kitchen in the first living area R1 (n11 <n12)。

[0209] At least one ceiling exhaust vent section 74 is provided on the ceiling panel 131 of the second living area R2, and is preferably installed in any one of the dirty zone, WIC, corridor, hall, and humid rooms. When multiple ceiling exhaust vent sections 74 are provided, some of them may be installed in rooms other than the dirty zone, WIC, corridor, hall, bathroom, and humid rooms, such as the bedroom, living room, and kitchen.

[0210] A plurality of first air outlets 81 are provided on the ceiling panel 141 of the first living area R1, and are preferably installed in rooms such as bedrooms, living rooms, and kitchens other than the dirty zone, WIC, corridor, hall, bathroom, and humid rooms. In addition, both the first air outlets 81 and the floor exhaust port 73 may be provided in rooms such as bedrooms and living rooms.

[0211] A plurality of second air outlets 82 are provided on the floorboard 143 of the second living area R2, and are preferably installed in rooms such as bedrooms, living rooms, and kitchens other than the dirty zone, WIC, corridor, hall, bathroom, and humid rooms. In addition, both the second air outlets 82 and the ceiling exhaust port 74 may be provided in rooms such as bedrooms and living rooms.

[0212] In the illustrated example, the first exhaust port 71 is installed in a second floor toilet as a first dirty zone dz1, the floor exhaust port 73 is installed in a first floor toilet as a second dirty zone dz2 separate from the first dirty zone dz1, another floor exhaust port 73 is installed in a first floor washroom as a third dirty zone dz3 separate from the first dirty zone dz1 and the second dirty zone dz2, and the ceiling exhaust port 74 is installed in a hall on the second floor. In this case, the installation of dedicated ventilation fans may be omitted in the dirty zones dz1, dz2, dz3 and hall where the first exhaust port 71, floor exhaust port 73 and ceiling exhaust port 74 are provided.

[0213] In the illustrated example, the first exhaust port 71 is provided on the floor panel 143 of the second living area R2, but depending on the layout of the house, the priority of the rooms to be exhausted, and the positions of the floor exhaust port 73 and ceiling exhaust port 74, the first exhaust port 71 may be provided on the ceiling panel 141 of the first living area R1, as shown in Figure 20.

[0214] In the ventilation system 5A, the exhaust blower 530 allows the indoor air to be suitably exhausted to the outdoors using the paths K1, K2, and K3 described below, passing through the third chamber R5 filled with outside air but without mixing with the outside air. K1: A path that flows from the floor exhaust port 73 through the first chamber R3, the first chamber exhaust duct 411, the main body 50, and the downstream exhaust duct 420. K2: A path that flows from the ceiling exhaust port 74 through the second chamber R4, the second chamber exhaust duct 412, the main body 50, and the downstream exhaust duct 420. K3: A path from the first exhaust port 71 through the first indoor exhaust duct 413 and the main body 50 to the downstream exhaust duct 420.

[0215] [Sixth embodiment] In addition to the ventilation devices 20, 20A, 20B, 20C, 20D, 20E, 20E', the houses 10, 10A, 10B, 10C, 10D, 10D' can also be configured as a ventilation and air conditioning system by providing indoor units of room air conditioners on the walls of the first living area R1 and the walls of the second living area R2.

[0216] A ventilation air-conditioning system 6 according to a sixth embodiment of the present invention will be described using Figure 21. The ventilation air-conditioning system 6 has indoor units 90A, 90B of a room air conditioner provided on a wall of the first living area R1 and a wall of the second living area R2 of the ventilation system 1 shown in Figure 1. The same components as those in the first embodiment are given the same reference numerals and will not be described.

[0217] The room air conditioner is equipped with an outdoor unit (not shown) and indoor units 90A, 90B, and is not limited to a standalone type in which one outdoor unit dedicated to each of the indoor units 90A, 90B is connected, but may also be a multi-type in which multiple indoor units 90A, 90B are connected to one outdoor unit.

[0218] The indoor units 90A, 90B are equipped with a heat exchanger, an air conditioning blower (crossflow fan), and a cabinet that houses these, taking in indoor air from an intake port 91 provided at the top of the cabinet, and the conditioned air from the heat exchanger is blown into the living space by the air conditioning blower from an outlet port 92 provided on the front (decorative surface) side of the lower part of the cabinet. The room air conditioner is not limited to a cooling type, but may have both cooling and heating functions, and the indoor unit may have various known functions such as dehumidification and purification. Reference numeral 93 in the drawing denotes the air conditioning blower.

[0219] In the first living area R1, the outside air that flows into the first living area R1 from the third chamber R5 through the first air outlet 81 in the first floor ceiling panel 141 mixes with the indoor air on the first floor and is taken in through the intake port 91 of the indoor unit 90A installed in the wall on the first floor for air conditioning.

[0220] In the second living area R2, the outside air that flows into the second living area R2 from the third chamber R5 through the second air outlet 82 in the floor board 143 of the second living area R2 mixes with the indoor air on the second floor and is taken in through the intake port 91 of the indoor unit 90B installed in the wall on the second floor for air conditioning.

[0221] The indoor unit 90A provided in the first living space R1 is preferably disposed below the first air outlet 81. When the indoor unit 90A is disposed below the first air outlet 81, most of the outside air supplied to the first living space R1 is conditioned by the indoor unit 90A, and the conditioned air is blown far away by the air conditioning blower 93 (crossflow fan) of the indoor unit 90A and the louvers of the air outlet 92. This allows the entire living space to be conditioned efficiently.

[0222] In the second living area R2 as well, the indoor unit 90B is preferably disposed above the second air outlet 82. When the indoor unit 90B is disposed above the second air outlet 82, the outdoor air supplied to the second living area R2 is conditioned by the indoor unit 90B, and the conditioned air is blown far away by the air conditioning blower 93 (crossflow fan) of the indoor unit 90B and the louvers of the air outlet 92. This allows the entire living area to be conditioned efficiently.

[0223] According to the ventilation air-conditioning system 6, the room air conditioner and the ventilation device are provided separately in the house 10, so installation work is easy. On the other hand, in the ventilation air-conditioning system of Patent Document 2, the ventilation device and the air conditioner need to be connected by a duct or the like, which may make the installation work complicated. Furthermore, in the central air-conditioning system of Patent Document 3, there is a risk that the conditioned air supplied from the air conditioners between floors will be exhausted to the outdoors by the main body of the ventilation device installed between the floors, so even if the conditioned air is supplied to the living space from outlet openings installed in the ceiling board on the first floor or the floor board on the second floor, it is not easy to air-condition the entire living space. In the ventilation air-conditioning system 6 of this embodiment, for example, by arranging the indoor unit 90A installed in the first living space R1 below the first outlet part 81, it is possible to send conditioned air to the entire room in which the indoor unit is located.

[0224] The present invention can be practiced without being limited to the above-described and illustrated examples.

[0225] The layout of the first and second living areas is not limited to the illustrated example. In addition, the first floor living area is the first living area, the second floor living area is the second living area, and the present invention has been described as being applied to a two-story house, but the present invention may be applied to a three-story house for ventilation. For example, the second floor living area is the first living area, and the third floor living area is the second living area, and the main body is accommodated between the second and third floors, the first chamber exhaust duct is extended from the third chamber (between floors) between the second and third floors to the first chamber on the floor side of the second floor, the second chamber exhaust duct is extended from the third chamber to the second chamber on the ceiling side of the third floor, the first exhaust port is attached to the ceiling board of the second floor or the floor board of the third floor, the upstream end of the first indoor exhaust duct is connected to the first exhaust port, and the second exhaust port is attached to the ceiling board of the second floor or the floor board of the third floor, and the upstream end of the second indoor exhaust duct is connected to the second exhaust port. Alternatively, in a three-story house, the living space on the first floor can be the first living space, and the living space on the second floor can be the second living space, and the ventilation device (ventilation system) of the present invention can be applied to these spaces. In this case, too, it is preferable to configure the space under the floor of the living space on the second floor to be highly airtight, and to configure the space above the ceiling of the living space on the third floor to be highly airtight as well.

[0226] In the first embodiment, the first chamber exhaust duct, the second chamber exhaust duct, the first indoor exhaust duct, and the second indoor exhaust duct are connected using three pipe joints (first pipe joint, second pipe joint, and third pipe joint), but instead of a so-called Y branch, other pipe joints such as a three-input one-output type or a four-input one-output type may be used for connection. The ventilation devices 20B, 20C, 20D, 20E, and 20E' and the ventilation device 20F described below may also be connected using a three-input one-output type pipe joint instead of a so-called Y branch.

[0227] In the ventilation device 20, 20A of the first embodiment, Air In the previous ventilation device 20F shown in FIG. 22, the downstream air supply duct 320 was provided with an end 321 of the downstream air supply duct 320, which was open into the third chamber R5. Air The duct 30A of the ventilation device 20 is configured only with the upstream air supply duct 310 upstream of the main body 50, omitting the downstream air supply duct 320 of the ventilation device 20. AirThe exhaust pipe is provided at the downstream end of the exhaust pipe 30A. Air The upstream exhaust duct 410′ is provided in the middle of the upstream supply duct 310. Furthermore, the second connection part 542 of the main body part 50 is provided as an opening opened in the third chamber R5. The outside air that has exchanged heat with the indoor air in the heat exchanger 510 of the main body part 50 is blown out from the second connection part 542 into the third chamber R5. The opening is not limited to the tapered second connection part 542, and may be formed as a hole penetrating the plate part of the case or cover without the second connection part 542. In FIG. 22, the upstream exhaust duct 410′ is represented by a thinner line than the upstream supply duct 310. In the ventilation devices 20B to 20F, the downstream supply duct 320 may also be omitted and the outside air may be blown out from an opening such as the second connection part 542 of the main body part 50 into the third chamber R5.

[0228] As shown in Fig. 3, the main body 50 of the ventilation device has only four duct connections, of which the first connection 541 is provided for the outside air inlet, the second connection 542 is provided for the outside air outlet, the third connection 543 is provided for the room air inlet, and the fourth connection 544 is provided for the room air outlet. The main body having a heat exchanger, an intake fan, and an exhaust fan is not limited to having four duct connections, and for example, a plurality of third connection parts for connecting the ducts for the inlet of the room air into the main body may be provided. For example, four third connection parts may be provided to connect the first chamber exhaust duct 411, the second chamber exhaust duct 412, the first indoor exhaust duct 413, and the second indoor exhaust duct 414 one by one.

[0229] The house may be provided with an inspection hatch in the third chamber R5 to allow for maintenance of the main body 50. For example, as shown in Fig. 23, an inspection hatch 95 is provided in a floor board 143 of the second living area R2. Fig. 23 shows a state in which a plate-like member (not shown) that closes the inspection hatch 95 has been removed, and reference symbol 95A denotes a frame of the inspection hatch 95. The main body 50 has a filter 551 for collecting foreign matter contained in the outside air and a filter 552 for collecting foreign matter contained in the indoor air, which are detachably attached to attachment portions on an attachment surface 570 of the main body 50. The attachment surface 570 of the main body 50 is desirably provided in the third chamber R5 facing upward so as to be exposed when the plate-shaped cover of the inspection hatch is opened. This allows the filters 551, 552 to be removed from the main body 50 and attached to the main body 50. It is desirable to shorten the distance between the mounting surface 570 of the main body 50 and the frame 95A of the inspection hatch 95. For example, shielding members 96A, 96B, 96C, and 96D are provided between the mounting surface 570 of the main body 50 and the frame 95A of the inspection hatch 95. The shielding members 96A, 96B, 96C, and 96D protrude downward from the frame 95A to reduce the gap between them and the main body 50. This makes it possible to prevent foreign matter from entering the third chamber R5. In Patent Documents 1 to 3, the main body of the ventilation device is provided between floors, but there is a risk that foreign matter may get into the space between floors during maintenance of the main body.

[0230] In the first embodiment, Table 3 is shown as reference information for the first judgment step of determining the first selected space portion in which the first exhaust port portion 71 is to be provided and the second judgment step of determining the second selected space portion in which the second exhaust port portion 72 is to be provided. However, taking into consideration the layout of the house in which the ventilation device is to be installed, it is also possible to use reference information including living space portions not listed in Table 3 or omitting some of the living space portions listed in Table 3. In this case, too, the priority order is based on the layout of the house, and specifically, depends on the necessity of discharging air pollutants in each living space portion. Here, air pollutants are, for example, carbon dioxide, carbon monoxide, nitrogen dioxide, sulfur dioxide, ozone, odor, water vapor (humidity), airborne dust, radon daughter nuclides, asbestos, and airborne microorganisms.

[0231] In the first judgment step, the first confirmation step C11, the second confirmation step C12, and the third confirmation step C13 are performed for each living space, but the first exhaust port 71 may be selected from the remaining living space in the order of the reference information after excluding the living space in which a ventilation fan other than that of the present invention is installed and the living space in which a floor exhaust port or a ceiling exhaust port is installed from the multiple living space in which the first exhaust port 71 is to be installed. Alternatively, after first selecting the first exhaust port 71 from the multiple living space in the order of the reference information, if the selected living space is a living space in which a ventilation fan other than that of the present invention is installed or a living space in which a floor exhaust port or a ceiling exhaust port is installed, the selection may be reset and another living space may be selected. The judgment method for determining the first exhaust port 71 can be performed in the same way when determining the second exhaust port 72 from the multiple living space in which the second exhaust port 72 is to be installed.

[0232] In this way, in the first judgment process, the order of selecting the living space area in which the first exhaust port 71 will be provided, identifying the living space area to be excluded from the target, and confirming whether the selected living space area is the same as the living space area to be excluded is not limited. This is similar to the second judgment process, and in the second judgment process, the order of selecting the living space area in which the second exhaust port 72 will be provided, identifying the living space area to be excluded from the target, and confirming whether the selected living space area is the same as the living space area to be excluded is not limited.

[0233] [Equivalent gap area] If the house has an entrance or return door leading to the inside of the first chamber R3 or the inside of the second chamber R4, the airtightness measurement is performed including the first chamber R3 and the second chamber R4 in the room. When measuring, there is no need to seal the floor exhaust port 73 or the ceiling exhaust port 74. In addition, the air volume of the first chamber R3 or the second chamber R4 is calculated and divided by the virtual ceiling height of 2.6 [m] to calculate the virtual area, which is included in the total floor area b.

[0234] [House structure] Although not shown in Fig. 1, the house 10 to which the ventilation system 1 is applied has a staircase as in the configuration examples of Figs. 6 and 7. In the present invention, the indoor air may flow from the first floor to the second floor or from the second floor to the first floor using the space of the staircase. Further, reference numeral 190 in Figs. 6 and 7 is an atrium extending from the floor of the first floor to the ceiling of the second floor, and the indoor air may flow from the first floor to the second floor or from the second floor to the first floor using this atrium 190. These are not limited to the house 10, and the same applies to other houses 10A, 10B, etc.

[0235] In the ventilation system of Fig. 6, the floor exhaust port 73 is provided in the toilet and washroom as the dirty zone on the first floor. Regarding the air volumes va of these toilets, vb of the washroom, and vc of the first chamber R3, in the ventilation system of the present invention, it is preferable to set the air volume vc of the first chamber R3 to be larger than the air volume va of the toilet and the air volume vb of the washroom (vc > va, vc > vb) so as to mix the air containing odors and the like with the air from other living rooms and the like outside the dirty zone. These are not limited to the house 10, and the same applies to other houses 10A, 10B, etc.

[0236] In the ventilation system 5 of Fig. 18, when the ceiling exhaust port 74 is provided in the toilet and washroom as the dirty zone on the second floor, comparing the air volumes vd of these toilets, ve of the washroom, and vf of the second chamber R4, it is preferable to set the air volume vf of the second chamber R4 to be larger than the air volume vd of the toilet and the air volume ve of the washroom (vf > vd, vf > ve) so as to mix the air containing odors and the like with the air from other living rooms and the like outside the dirty zone.

[0237] When the first chamber R3 is used as a flow path for exhausting indoor air from the first living area R1, when the upstream end 411A of the first chamber exhaust duct 411 and the multiple floor exhaust ports 73 provided on the floor plate of the first living area R1 are projected onto the same imaginary horizontal plane, the multiple floor exhaust ports 73 are preferably provided around the end 411A. For example, as shown in FIG. 8, when the floor exhaust ports 73 arranged at different angles clockwise from the end 411A are connected in order by an imaginary line L1 shown by a dashed line, the multiple floor exhaust ports 73 are provided to surround the end 411A of the first chamber exhaust duct 411, and more specifically, the end 411A is provided in an area inside the periphery formed by the imaginary line L1. The linear distance from the end 411A to the floor exhaust ports 73 is not limited to be the same. [Explanation of symbols]

[0238] 1,2,3,4,5,5A Ventilation System 6. Ventilation and air conditioning system 10,10A,10B,10C,10D,10D′ House 119,143 Floorboards 131,141 Ceiling panel 20, 20A, 20B, 20C, 20D, 20E, 20E', 20F Ventilation equipment 30,30A supply Air Kut 310 Upstream air supply duct 320 Downstream air supply duct 321 End 330 Intake port 40,40A,40B,40C,40D,40D′ Exhaust Air Kut 410, 410′, 410A, 410B, 410C, 410D, 410D′ Upstream exhaust duct 411 First chamber exhaust duct 411A End 412 Second chamber exhaust duct 412A End 413 First indoor exhaust duct 414 Second indoor exhaust duct 415 Main unit connection duct 419A Third room exhaust duct 419B Fourth indoor exhaust duct 420 Downstream exhaust duct 430 Discharge port 50 Main body 510 heat exchanger 520 Air supply fan 530 Exhaust Fan 71 First exhaust port 72 Second exhaust port 73 Floor exhaust port 74 Ceiling exhaust port 76 Third exhaust port 77 Fourth exhaust port 81 First outlet section 82 Second air outlet section R1 First living area R2 Second living area R3 First Chamber R4 Second Chamber R5 Third chamber (floor)

Claims

1. A ventilation system for ventilating a house (excluding a house in which an indoor unit of a room air conditioner is provided in the third chamber) including a first living portion, a second living portion provided above the first living portion, a first chamber provided below the first living portion, a second chamber provided above the second living portion, and a third chamber provided between the first living portion and the second living portion to form an inter-floor space, by a ventilation device, comprising: The ventilation device includes an intake duct through which outside air flows, an exhaust duct through which indoor air flows, and a main body provided with an intake fan, an exhaust fan, and a heat exchanger; The heat exchanger exchanges heat between the outside air and the indoor air, the main body is provided midway through the air intake duct and the exhaust duct and is accommodated in the third chamber, and a downstream end of the air intake duct is held inside the third chamber, and the outside air is blown out from the downstream end of the air intake duct into the inside of the third chamber by the air intake blower, or the main body is provided at the downstream end of the air intake duct and midway through the exhaust duct and is accommodated in the third chamber, and the outside air is blown out from an opening of the main body into the inside of the third chamber by the air intake blower, the upstream exhaust duct upstream of the main body portion comprises: a first chamber exhaust duct extending from inside the first chamber to inside the third chamber; a second chamber exhaust duct extending from inside the second chamber to inside the third chamber; a first indoor exhaust duct connected to a first exhaust port portion (excluding one equipped with a blower) provided in a ceiling panel of the first living area or a floor panel of the second living area and provided inside the third chamber; and a second indoor exhaust duct connected to a second exhaust port portion (excluding one equipped with the blower) provided in the ceiling panel of the first living area or the floor panel of the second living area and provided inside the third chamber; The ceiling panel of the first living space includes a plurality of first air outlets (excluding the one including the blower) through which the outside air of the third chamber is blown out to the first living space, The floor plate of the second living area includes a plurality of second air outlets (excluding the one including the blower) through which the outside air of the third chamber is blown out to the second living area, a floor plate of the first living area includes a plurality of floor exhaust ports (excluding the one including the blower) communicating with the interior of the first chamber; a ceiling panel of the second living area includes a ceiling exhaust port portion (excluding the one including the blower) communicating with the inside of the second chamber; A ventilation system, characterized in that the exhaust fan exhausts the indoor air to the outdoors through the following routes K1, K2, K3 and K4. K1: A path that flows from the floor exhaust port through the first chamber, the first chamber exhaust duct, the main body, and the downstream exhaust duct. K2: A path from the ceiling exhaust port portion through the second chamber, the second chamber exhaust duct, the main body portion, and the downstream exhaust duct. K3: A path from the first exhaust port portion through the first indoor exhaust duct and the main body portion to the downstream exhaust duct. K4: A path that flows from the second exhaust port portion through the second indoor exhaust duct and the main body portion to the downstream exhaust duct.

2. the upstream exhaust duct further includes a main body connecting duct, the downstream end of which is connected to the main body and provided inside the third chamber, through which the room air from the first chamber exhaust duct, the room air from the second chamber exhaust duct, the room air from the first indoor exhaust duct, and the room air from the second indoor exhaust duct flow, A downstream end of the second chamber exhaust duct and a downstream end of the first indoor exhaust duct are connected to two inlet connection portions of a two-input, one-output type first pipe joint; the outlet connection portion of the first pipe joint and a downstream end portion of the second indoor exhaust duct are connected to two inlet connection portions of a two-input, one-output type second pipe joint; The outlet connection of the second pipe joint and the downstream end of the first chamber exhaust duct are connected to two inlet connection parts of a two-input, one-output type third pipe joint; 2. The ventilation system according to claim 1, further characterized in that an upstream end of the main body connection duct is connected to an outlet connection portion of the third pipe joint.

3. A ventilation system for ventilating a house (excluding a house in which an indoor unit of a room air conditioner is provided in the third chamber) including a first living portion, a second living portion provided above the first living portion, a first chamber provided below the first living portion, a second chamber provided above the second living portion, and a third chamber provided between the first living portion and the second living portion to form an inter-floor space, by a ventilation device, comprising: The ventilation device includes an intake duct through which outside air flows, an exhaust duct through which indoor air flows, and a main body provided with an intake fan, an exhaust fan, and a heat exchanger; The heat exchanger exchanges heat between the outside air and the indoor air, the main body is provided midway through the air intake duct and the exhaust duct and is accommodated in the third chamber, and a downstream end of the air intake duct is held inside the third chamber, and the outside air is blown out from the downstream end of the air intake duct into the inside of the third chamber by the air intake blower, or the main body is provided at the downstream end of the air intake duct and midway through the exhaust duct and is accommodated in the third chamber, and the outside air is blown out from an opening of the main body into the inside of the third chamber by the air intake blower, the upstream exhaust duct upstream of the main body portion comprises: a first chamber exhaust duct extending from inside the first chamber to inside the third chamber; a first indoor exhaust duct connected to a first exhaust port portion (excluding one equipped with a blower) provided in a ceiling panel of the first living area or a floor panel of the second living area and provided inside the third chamber; and a second indoor exhaust duct connected to a second exhaust port portion (excluding one equipped with the blower) provided in the ceiling panel of the first living area or the floor panel of the second living area and provided inside the third chamber; The ceiling panel of the first living space includes a plurality of first air outlets (excluding the one including the blower) through which the outside air of the third chamber is blown out to the first living space, The floor plate of the second living area includes a plurality of second air outlets (excluding the one including the blower) through which the outside air of the third chamber is blown out to the second living area, a floor plate of the first living area includes a plurality of floor exhaust ports (excluding the one including the blower) communicating with the interior of the first chamber; The second chamber is a non-exhaust chamber that is not utilized as a flow path for the indoor air, A ventilation system, characterized in that the exhaust fan exhausts the indoor air to the outdoors through the following routes K1, K3, and K4. K1: A path that flows from the floor exhaust port through the first chamber, the first chamber exhaust duct, the main body, and the downstream exhaust duct. K3: A path from the first exhaust port portion through the first indoor exhaust duct and the main body portion to the downstream exhaust duct. K4: A path that flows from the second exhaust port portion through the second indoor exhaust duct and the main body portion to the downstream exhaust duct.

4. The ventilation system according to claim 3, wherein the house has a ceiling panel of the second living area provided with a thermal insulation material.

5. A ventilation system for ventilating a house (excluding a house in which an indoor unit of a room air conditioner is provided in the third chamber) including a first living portion, a second living portion provided above the first living portion, a first chamber provided below the first living portion, a second chamber provided above the second living portion, and a third chamber provided between the first living portion and the second living portion to form an inter-floor space, by a ventilation device, comprising: The ventilation device includes an intake duct through which outside air flows, an exhaust duct through which indoor air flows, and a main body provided with an intake fan, an exhaust fan, and a heat exchanger; The heat exchanger exchanges heat between the outside air and the indoor air, the main body is provided midway through the air intake duct and the exhaust duct and is accommodated in the third chamber, and a downstream end of the air intake duct is held inside the third chamber, and the outside air is blown out from the downstream end of the air intake duct into the inside of the third chamber by the air intake blower, or the main body is provided at the downstream end of the air intake duct and midway through the exhaust duct and is accommodated in the third chamber, and the outside air is blown out from an opening of the main body into the inside of the third chamber by the air intake blower, the upstream exhaust duct upstream of the main body portion comprises: a second chamber exhaust duct extending from the inside of the second chamber to the inside of the third chamber; a first indoor exhaust duct connected to a first exhaust port portion (excluding one equipped with a blower) provided in a ceiling panel of the first living area or a floor panel of the second living area and provided in the inside of the third chamber; and a second indoor exhaust duct connected to a second exhaust port portion (excluding one equipped with the blower) provided in the ceiling panel of the first living area or the floor panel of the second living area and provided in the inside of the third chamber; The ceiling panel of the first living space includes a plurality of first air outlets (excluding the one including the blower) through which the outside air of the third chamber is blown out to the first living space, The floor plate of the second living area includes a plurality of second air outlets (excluding the one including the blower) through which the outside air of the third chamber is blown out to the second living area, a ceiling panel of the second living area includes a ceiling exhaust port portion (excluding the one including the blower) communicating with the inside of the second chamber; The first chamber is a non-exhaust chamber that is not utilized as a flow path for the indoor air, A ventilation system, characterized in that the exhaust fan exhausts the indoor air to the outdoors via the following routes K2, K3, and K4. K2: A path that flows from the ceiling exhaust port portion through the second chamber, the second chamber exhaust duct, and the main body portion to the downstream exhaust duct. K3: A path from the first exhaust port portion through the first indoor exhaust duct and the main body portion to the downstream exhaust duct. K4: A path that flows from the second exhaust port portion through the second indoor exhaust duct and the main body portion to the downstream exhaust duct.

6. The ventilation system according to claim 5, wherein the house has a floor panel of the first living area provided with a thermal insulation material.

7. A ventilation system for ventilating a house (excluding a house in which an indoor unit of a room air conditioner is provided in the third chamber) including a first living portion, a second living portion provided above the first living portion, a first chamber provided below the first living portion, a second chamber provided above the second living portion, and a third chamber provided between the first living portion and the second living portion to form an inter-floor space, by a ventilation device, comprising: The ventilation device includes an intake duct through which outside air flows, an exhaust duct through which indoor air flows, and a main body provided with an intake fan, an exhaust fan, and a heat exchanger; The heat exchanger exchanges heat between the outside air and the indoor air, the main body is provided midway through the air intake duct and the exhaust duct and is accommodated in the third chamber, and a downstream end of the air intake duct is held inside the third chamber, and the outside air is blown out from the downstream end of the air intake duct into the inside of the third chamber by the air intake blower, or the main body is provided at the downstream end of the air intake duct and midway through the exhaust duct and is accommodated in the third chamber, and the outside air is blown out from an opening of the main body into the inside of the third chamber by the air intake blower, the upstream exhaust duct upstream of the main body portion comprises: a first indoor exhaust duct connected to a first exhaust port portion (excluding one equipped with a fan) provided in a ceiling board of the first living area or a floor board of the second living area and provided inside the third chamber; a second indoor exhaust duct connected to a second exhaust port portion (excluding one equipped with the fan) provided in the ceiling board of the first living area or the floor board of the second living area and provided inside the third chamber; a third indoor exhaust duct connected to a third exhaust port portion (excluding one equipped with the fan) provided in the ceiling board of the first living area or the floor board of the second living area and provided inside the third chamber; and a fourth indoor exhaust duct connected to a fourth exhaust port portion (excluding one equipped with the fan) provided in the ceiling board of the first living area or the floor board of the second living area and provided inside the third chamber; The ceiling panel of the first living space includes a plurality of first air outlets (excluding the one including the blower) through which the outside air of the third chamber is blown out to the first living space, The floor plate of the second living area includes a plurality of second air outlets (excluding the one including the blower) through which the outside air of the third chamber is blown out to the second living area, The first chamber and the second chamber are non-exhaust chambers that are not utilized as a flow path for the indoor air, A ventilation system, characterized in that the exhaust fan exhausts the indoor air to the outdoors through the following routes K3, K4, K5 and K6. K3: A path from the first exhaust port portion through the first indoor exhaust duct and the main body portion to the downstream exhaust duct. K4: A path that flows from the second exhaust port portion through the second indoor exhaust duct and the main body portion to the downstream exhaust duct. K5: A path that flows from the third exhaust port portion through the third indoor exhaust duct and the main body portion to the downstream exhaust duct. K6: A path that flows from the fourth exhaust port portion through the fourth indoor exhaust duct and the main body portion to the downstream exhaust duct.

8. The ventilation system according to claim 7, wherein the house is provided with a heat insulating material on a floor panel of the first living area, and the heat insulating material is provided on a ceiling panel of the second living area.

9. A ventilation system for ventilating a house (excluding a house in which an indoor unit of a room air conditioner is provided in the third chamber) including a first living portion, a second living portion provided above the first living portion, a first chamber provided below the first living portion, a second chamber provided above the second living portion, and a third chamber provided between the first living portion and the second living portion to form an inter-floor space, by a ventilation device, comprising: The ventilation device includes an intake duct through which outside air flows, an exhaust duct through which indoor air flows, and a main body provided with an intake fan, an exhaust fan, and a heat exchanger; The heat exchanger exchanges heat between the outside air and the indoor air, the main body is provided midway through the air intake duct and the exhaust duct and is accommodated in the third chamber, and a downstream end of the air intake duct is held inside the third chamber, and the outside air is blown out from the downstream end of the air intake duct into the inside of the third chamber by the air intake blower, or the main body is provided at the downstream end of the air intake duct and midway through the exhaust duct and is accommodated in the third chamber, and the outside air is blown out from an opening of the main body into the inside of the third chamber by the air intake blower, the upstream exhaust duct upstream of the main body portion includes a first chamber exhaust duct extending from inside the first chamber to inside the third chamber, a second chamber exhaust duct extending from inside the second chamber to inside the third chamber, a two-input, one-output type pipe joint having a downstream end of the first chamber exhaust duct and a downstream end of the second chamber exhaust duct connected to two inflow connection parts, and a main body connection duct having an upstream end connected to the outflow connection part of the pipe joint and a downstream end connected to the main body portion, a ceiling panel of the first living space includes a plurality of first air outlets (excluding those including a blower) through which the outside air of the third chamber is blown into the first living space; a floor panel of the second living space includes a plurality of second air outlets (excluding the one including the blower) through which the outside air of the third chamber is blown into the second living space; a floor plate of the first living area includes a plurality of floor exhaust ports (excluding the one including the blower) communicating with the interior of the first chamber; a ceiling panel of the second living area includes a ceiling exhaust port portion (excluding the one including the blower) communicating with the inside of the second chamber; A ventilation system, characterized in that the exhaust fan exhausts the indoor air to the outdoors via the following routes K1 and K2. K1: A path that flows from the floor exhaust port through the first chamber, the first chamber exhaust duct, the main body, and the downstream exhaust duct. K2: A path from the ceiling exhaust port portion through the second chamber, the second chamber exhaust duct, the main body portion, and the downstream exhaust duct.

10. A ventilation system for ventilating a house (excluding a house in which an indoor unit of a room air conditioner is provided in the third chamber) including a first living portion, a second living portion provided above the first living portion, a first chamber provided below the first living portion, a second chamber provided above the second living portion, and a third chamber provided between the first living portion and the second living portion to form an inter-floor space, by a ventilation device, comprising: The ventilation device includes an intake duct through which outside air flows, an exhaust duct through which indoor air flows, and a main body provided with an intake fan, an exhaust fan, and a heat exchanger; The heat exchanger exchanges heat between the outside air and the indoor air, the main body is provided midway through the air intake duct and the exhaust duct and is accommodated in the third chamber, and a downstream end of the air intake duct is held inside the third chamber, and the outside air is blown out from the downstream end of the air intake duct into the inside of the third chamber by the air intake blower, or the main body is provided at the downstream end of the air intake duct and midway through the exhaust duct and is accommodated in the third chamber, and the outside air is blown out from an opening of the main body into the inside of the third chamber by the air intake blower, an upstream exhaust duct upstream of the main body portion includes a first chamber exhaust duct extending from inside the first chamber to inside the third chamber, a second chamber exhaust duct extending from inside the second chamber to inside the third chamber, and a first indoor exhaust duct provided inside the third chamber and connected to a first exhaust port portion (excluding one equipped with a blower) provided in a ceiling panel of the first living area or a floor panel of the second living area; The ceiling panel of the first living space includes a plurality of first air outlets (excluding the one including the blower) through which the outside air of the third chamber is blown out to the first living space, The floor plate of the second living area includes a plurality of second air outlets (excluding the one including the blower) through which the outside air of the third chamber is blown out to the second living area, a floor plate of the first living area includes a plurality of floor exhaust ports (excluding the one including the blower) communicating with the interior of the first chamber; a ceiling panel of the second living area includes a ceiling exhaust port portion (excluding the one including the blower) communicating with the inside of the second chamber; A ventilation system, characterized in that the exhaust fan exhausts the indoor air to the outdoors through the following routes K1, K2, and K3. K1: A path that flows from the floor exhaust port through the first chamber, the first chamber exhaust duct, the main body, and the downstream exhaust duct. K2: A path from the ceiling exhaust port portion through the second chamber, the second chamber exhaust duct, the main body portion, and the downstream exhaust duct. K3: A path from the first exhaust port portion through the first indoor exhaust duct and the main body portion to the downstream exhaust duct.

11. The house has either a dirty zone x1 or a dirty zone x2 as a first selected space portion having the first exhaust port portion, The ventilation system according to any one of claims 1 to 8 and 10, wherein the first selected space portion is not provided with a ventilation fan. Dirty zone x1: A toilet, a washroom, a dressing room (excluding those used as the washroom), a shoe closet, and an entrance hall provided in the first living area. Dirty zone x2: Toilet, washroom, and dressing room provided in the second living area (excluding those shared with the washroom in the second living area).

12. The house has either a dirty zone x1 or a dirty zone x2 as a first selected space portion having the first exhaust port portion, The first selected space portion is not provided with a ventilation fan, A ventilation system according to any one of claims 1 to 8 and 10, characterized in that the following condition α 20 is satisfied: Dirty zone x1: A toilet, a washroom, a dressing room (excluding those used as the washroom), a shoe closet, and an entrance hall provided in the first living area. Dirty zone x2: Toilet, washroom, and dressing room provided in the second living area (excluding those shared with the washroom in the second living area). Condition α20: When the first selected space portion is provided in the first living area, the first selected space portion does not have the first air outlet portion, or when the first selected space portion is provided in the second living area, the first selected space portion does not have the second air outlet portion.

13. The house, As a first selective space portion provided with the first exhaust port portion, any one of the following dirty zone x1 and dirty zone x2; The second selective space portion is provided with the second exhaust port portion, and the dirty zone x1 or the dirty zone x2 (excluding the first selective space portion), The ventilation system according to any one of claims 1 to 8, wherein the first selected space portion and the second selected space portion are not provided with a ventilation fan. Dirty zone x1: A toilet, a washroom, a dressing room (excluding those used as the washroom), a shoe closet, and an entrance hall provided in the first living area. Dirty zone x2: Toilet, washroom, and dressing room provided in the second living area (excluding those shared with the washroom in the second living area).

14. The house, As a first selective space portion provided with the first exhaust port portion, any one of the following dirty zone x1 and dirty zone x2; The second selective space portion is provided with the second exhaust port portion, and the dirty zone x1 or the dirty zone x2 (excluding the first selective space portion), The first selected space portion and the second selected space portion are not provided with a ventilation fan, A ventilation system according to any one of claims 1 to 8, characterized in that the following conditions α 20 and α 30 are satisfied: Dirty zone x1: A toilet, a washroom, a dressing room (excluding those used as the washroom), a shoe closet, and an entrance hall provided in the first living area. Dirty zone x2: Toilet, washroom, and dressing room provided in the second living area (excluding those shared with the washroom in the second living area). Condition α20: When the first selected space portion is provided in the first living area, the first selected space portion does not have the first air outlet portion, or when the first selected space portion is provided in the second living area, the first selected space portion does not have the second air outlet portion. Condition α30: When the second selected space portion is provided in the first living area, the second selected space portion does not have the first air outlet portion, or when the second selected space portion is provided in the second living area, the second selected space portion does not have the second air outlet portion.

15. A ventilation system as described in claim 1, characterized in that the first exhaust port portion and the second exhaust port portion are provided on the floor board of the second living area.

16. The house has any one of the following dirty zones x1 as a third selected space portion in which any one of the plurality of floor exhaust port portions is provided, The ventilation system according to any one of claims 1 to 4, 9, 10 and 15, characterized in that the third selected space portion is not provided with a ventilation fan. Dirty zone x1: A toilet, a washroom, a dressing room (excluding those used as the washroom), a shoe closet, and an entrance hall provided in the first living area.

17. The house has any one of the following dirty zones x1 as a third selected space portion in which any one of the plurality of floor exhaust port portions is provided, The ventilation system according to any one of claims 1 to 4, 9, 10 and 15, wherein the third selective space portion is not provided with a ventilation fan and the first air outlet portion. Dirty zone x1: A toilet, a washroom, a dressing room (excluding those used as the washroom), a shoe closet, and an entrance hall provided in the first living area.

18. The house is provided with a plurality of ceiling exhaust vents, Furthermore, the house includes any one of the following dirty zones x2 as a fourth selective space portion in which any one of the plurality of ceiling exhaust port portions is provided, 16. The ventilation system according to claim 1, wherein the fourth selected space portion is not provided with a ventilation fan. Dirty zone x2: Toilet, washroom, and dressing room provided in the second living area (excluding those shared with the washroom in the second living area).

19. The house is provided with a plurality of ceiling exhaust vents, Furthermore, the house includes any one of the following dirty zones x2 as a fourth selective space portion in which any one of the plurality of ceiling exhaust port portions is provided, 16. The ventilation system according to claim 1, wherein the fourth selective space portion is not provided with a ventilation fan and the second air outlet portion. Dirty zone x2: Toilet, washroom, and dressing room provided in the second living area (excluding those shared with the washroom in the second living area).

20. The house, As the first selected space portion provided with the first exhaust port portion, any one of the following dirty zones x1; Any of the dirty zones x1 (excluding the first selected space portion) as a third selected space portion in which any of the plurality of floor exhaust port portions is provided; The ventilation system according to any one of claims 1 to 4 and 10, wherein the first selected space portion and the third selected space portion are not provided with a ventilation fan. Dirty zone x1: A toilet, a washroom, a dressing room (excluding those used as the washroom), a shoe closet, and an entrance hall provided in the first living area.

21. The house, As the first selected space portion provided with the first exhaust port portion, any one of the following dirty zones x1; Any of the dirty zones x1 (excluding the first selected space portion) as a third selected space portion in which any of the plurality of floor exhaust port portions is provided; The ventilation system according to any one of claims 1 to 4 and 10, wherein the first selected space portion and the third selected space portion are not provided with a ventilation fan and the first air outlet portion. Dirty zone x1: A toilet, a washroom, a dressing room (excluding those used as the washroom), a shoe closet, and an entrance hall provided in the first living area.

22. The house is provided with a plurality of ceiling exhaust vents, Furthermore, the house is As the first selected space portion provided with the first exhaust port portion, any one of the following dirty zones x2; Any of the dirty zones x2 (excluding the first selected space portion) as a fourth selected space portion in which any of the plurality of ceiling exhaust port portions is provided, 11. The ventilation system according to claim 1, wherein the first selected space portion and the fourth selected space portion are not provided with a ventilation fan. Dirty zone x2: Toilet, washroom, and dressing room provided in the second living area (excluding those shared with the washroom in the second living area).

23. The house is provided with a plurality of ceiling exhaust vents, Furthermore, the house is As the first selected space portion provided with the first exhaust port portion, any one of the following dirty zones x2; Any of the dirty zones x2 (excluding the first selected space portion) as a fourth selected space portion in which any of the plurality of ceiling exhaust port portions is provided, 11. The ventilation system according to claim 1, wherein the first selected space portion and the fourth selected space portion are not provided with a ventilation fan and the second air outlet portion. Dirty zone x2: Toilet, washroom, and dressing room provided in the second living area (excluding those shared with the washroom in the second living area).

24. A ventilation system as described in any one of claims 1, 2, 5, 6, 9, 10 or 15, characterized in that a plurality of the ceiling exhaust outlet sections are provided.

25. A ventilation system as described in claim 7 or claim 8, characterized in that the first exhaust port portion and the second exhaust port portion are provided on the ceiling panel of the first living area, and the third exhaust port portion and the fourth exhaust port portion are provided on the floor panel of the second living area.

26. The house has an equivalent gap area of ​​1.0 cm according to JIS A2201:2017 (airtightness test method for houses, etc. using a blower). ２ / m ２ ] The ventilation system according to any one of claims 1 to 10 and 15, characterized in that it is configured as follows.

27. The house has an inspection hatch in the floor board of the second living area, The ventilation system according to any one of claims 1 to 10 and 15, characterized in that the main body is provided below the inspection hatch.

28. A ventilation system according to any one of claims 1 to 10 and 15, The indoor unit of the room air conditioner provided in the first living area, The indoor unit includes an air conditioning blower that blows conditioned air, and the indoor unit is disposed below the first air outlet portion, A ventilation and air conditioning system characterized in that the indoor unit conditions the outside air that flows into the first living space from the first air outlet portion above the indoor unit, and blows the conditioned air into the first living space.

29. A ventilation system according to any one of claims 1 to 10 and 15, The indoor unit of the room air conditioner provided in the second living area, The indoor unit includes an air conditioning blower that blows conditioned air, and the indoor unit is further disposed above the second air outlet portion, A ventilation and air conditioning system characterized in that the indoor unit conditions the outside air that flows into the second living space from the second air outlet portion below the indoor unit, and blows the conditioned air into the second living space.

30. A method for attaching the first exhaust port portion and the second exhaust port portion of the ventilation system according to claim 1 to the ceiling panel of the first living space or the floor panel of the second living space that constitutes the third chamber, comprising: A first installation step of installing the first exhaust port portion in a first selected space portion based on a layout of the house; A second installation step of installing the second exhaust port portion in a second selected space portion based on a layout of the house, The first mounting step includes mounting the first exhaust port portion to the ceiling board of the first selected space portion if the first selected space portion is any one of a toilet, a washroom, a dressing room (excluding those that are also used as a washroom), a shoe closet, and an entrance of the first living area, and mounting the first exhaust port portion to the floor board of the first selected space portion if the first selected space portion is any one of a toilet, a washroom, and a dressing room (excluding those that are also used as the washroom of the second living area) of the second living area, The second installation step is a method for installing an exhaust port portion, characterized in that if the second selected space portion is any of the toilet, the washroom, the changing room, the shoe closet, or the entrance of the first living area (excluding the first selected space portion), the second exhaust port portion is installed on the ceiling panel of the second selected space portion, and if the second selected space portion is any of the toilet, the washroom, or the changing room of the second living area (excluding the first selected space portion), the second exhaust port portion is installed on the floor panel of the second selected space portion.

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