JP6519750B2 - Ventilation system and house - Google Patents

Description

  The present invention relates to a ventilation system and a house. In particular, the present invention relates to a ventilation system and a house for ventilating a room while reducing heat loss during exhaust without requiring complicated duct piping in a single-family house.

  With the depletion of fossil fuels, air pollution due to heavy use of fossil fuels and global warming due to carbon dioxide becoming a major social problem, the need for energy saving is increasing more and more. Above all, energy consumption in a house or a building is rising with the tendency to desire a comfortable living space using air conditioning and heating, and energy saving by high airtightness and heat insulation of the building is required. On the other hand, in a space sealed by high airtightness and high thermal insulation, its air quality is deteriorated by living activities, so planned ventilation is required for a high airtight and high thermal insulation building, and both functions are combined. Design and materials are required.

  Conventionally, ventilation is generally performed by a method of providing a ventilation device on a wall, but the ventilation causes heat loss. One way to solve this is to install a heat exchanger in the ventilating port to reduce the heat loss during exhaust. However, this device has a low heat recovery capacity and a small vent opening in the wall, so the air flow is localized and it is difficult to ventilate the room.

  In addition, it is said that the whole building air conditioning can make the most of the merits of high airtightness and high heat insulation houses. Then, a next-generation air conditioning system has been proposed, which enables air conditioning and air conditioning with one commercially available wall-mounted room air conditioner, and at the same time can perform ventilation, air purification, humidification, and dehumidification, saving energy and a comfortable indoor environment ( For example, Patent Document 1 and Patent Document 2). In this entire building air conditioning system, for example, as shown in FIG. 9, a duct is stretched like an octopus over the whole room, and ventilation and air conditioning (cooling, heating) are performed by drawing air with a duct.

Patent No. 5094894 gazette Patent No. 5067769

However, in this whole building air conditioning system, air is drawn by a duct, which is highly reliable from the viewpoint of ventilation, but has the following drawbacks.
For example, the duct must be stretched like an octopus over the whole room, the piping becomes complicated and the initial investment is expensive. Although the exchange efficiency of the total heat exchange apparatus itself of the air conditioning unit has been improved by the recent performance improvement, the heat exchange efficiency of the entire room is limited due to its structure. In addition, it is necessary to replace the filter regularly, which is time-consuming and costly for maintenance and is troublesome. When the system is shut down in spring or autumn, there is a risk that dirty air may be retained in the duct during the pause period, and when operation is resumed, the dirty air retained in the duct may flow into the room.

  Therefore, the present invention solves the problems of the prior art as described above, and there is no need for complicated duct piping in a building such as a single-family house, energy saving can be realized by excellent heat insulation performance, and It is an object of the present invention to provide a ventilation system and a house capable of realizing reduction of heat loss at the same time as improvement of air quality by introduction of fresh air.

[1]
One or more floor portions, and the floor portion of the floor portion defined under the lowermost floor portion, and a pair of opposing wall portions immediately below the first weir and the second weir directly A ventilation system applied to a house having a wall,
An inorganic foam that constitutes a wall immediately below the first and second weirs and divides the outdoor space from the indoor space so as to be ventilated;
A space separating wall for separating an indoor space of the house into a first space connected to a wall immediately below the first weir and a second space connected to a wall just below the second weir;
An underfloor separation wall separating the underfloor space into a first underfloor space spatially connected to the first space, and a second underfloor space spatially connected to the second space;
A blower capable of blowing in forward and reverse directions, disposed on the below-floor separating wall;
A blower control unit that switches the blower direction of the blower at a predetermined timing;
A duct connecting the first space and the first under-floor space;
By blowing air from the first underfloor space toward the second underfloor space by the blower,
(1) The air supplied to the first space from the outdoor space through the inorganic foam in the wall immediately below the first weir is transported to the first underfloor space through the duct,
(2) moving the air conveyed to the first underfloor space from the first underfloor space to the second underfloor space by the blower;
(3) The air moved to the second underfloor space is moved from the second underfloor space to the second space,
(4) The air moved to the second space is exhausted to the outdoor space through the inorganic foam in the wall immediately below the second weir,
The air flow is reversed from the above (1) to (4) by switching the blowing direction of the blower and blowing air from the second underfloor space toward the first underfloor space. Ventilation system.
[2]
The ventilation system according to [1], wherein the first space is an attic space.
[3]
The ventilation system according to [1] or [2], wherein the duct is disposed substantially vertically.
[4]
The ventilation system according to any one of [1] to [3], wherein the wall immediately below the first and second fins is a end wall.
[5]
The ventilation system according to any one of [1] to [4], wherein the inorganic foam is a breathable inorganic heat insulating concrete (BIC).
[6]
The ventilation system according to any one of [1] to [5], wherein the air flow control unit switches the air flow direction of the air blower every 60 minutes or less.
[7]
The ventilation system according to any one of [1] to [6], further comprising a temperature / humidity adjustment device disposed in the vicinity of the blower in the underfloor space.
[8]
The ventilation system according to any one of [1] to [7], wherein the floor portion is provided with a vent for passing air in a vertical direction.
[9]
The indoor space is partitioned by a partition wall, and the partition wall is provided with a communication port for communicating the partitioned spaces in a lateral direction, any one of [1] to [8]. Ventilation system according to paragraph.
[10]
A house provided with the ventilation system according to any one of [1] to [9].

  In the ventilation system and the house according to the present invention, the wall portions immediately below the pair of weirs are made of inorganic foam, so that there is no need for complicated duct piping, energy saving due to excellent heat insulation performance can be realized, and freshness to the room At the same time as the improvement of air quality by the introduction of air, the reduction of the heat loss at the time of exhaust can be realized.

It is a perspective view showing an example of the house where the ventilation system of the present invention is applied. It is a sectional view showing an example of the house where the ventilation system of the present invention is applied. It is a sectional view showing an example of the house where the ventilation system of the present invention is applied. It is a disassembled perspective view for demonstrating the flow of air in the ventilation system of this invention. It is a disassembled perspective view for demonstrating the flow of air in the ventilation system of this invention. It is a disassembled perspective view for demonstrating the flow of air in the ventilation system of this invention. It is a disassembled perspective view for demonstrating the flow of air in the ventilation system of this invention. It is a disassembled perspective view for demonstrating the flow of air in the ventilation system of this invention. It is a figure which shows an example of the conventional whole building air conditioning system.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The ventilation system according to the present invention utilizes Dynamic Insulation (hereinafter referred to as DI).
Dynamic insulation is a method of supplying and exhausting air from a large heat-permeable and large-area building skin. There are advantages such as energy saving effect by recovering indoor heat (one-through heat) and humidity that escapes from the building skin (total heat recovery), alleviation of air flow feeling by distributed air supply, and appearance improvement by reducing wall natural ventilation opening. .

In the present invention, in particular, DI is a breathing type in which the supply and the discharge are alternately performed. In this method, exhaust heat of ventilation is also recovered, and it is thought that it contributes to the improvement of high energy saving property and a sense of dryness.
For example, if a building is reinforced concrete (RC: Reinforced-Concrete) construction, basically it is highly airtight, and if it is an apartment building, the south face and the north face are in contact with the open air, which is a feature of the breathable DI. A two-way air outlet can be secured. However, it has been difficult to apply the breathable DI to single-family houses with many openings. This is due to the following reasons. That is, first, in single-family homes, windows are irregularly present on the four-sided wall, making it difficult to secure a large wall. In addition, even if the wall surface is secured by avoiding the window, it is difficult to secure an effective ventilated area on the indoor side by equipment such as storage furniture, unit baths and vanities, pictures and wall hangings, etc. Thus, the commercialization of DI in single-family homes was difficult.
Therefore, the present inventors considered a model for putting respiratory DI into practical use in a single-family house with many walls.

That is, the ventilation system of the present invention
One or more floor portions, an underfloor space defined below the lowermost floor portion of the floor portions, and a pair of opposing wall portions immediately below the first weir and a wall immediately below the second weir A ventilation system applied to a house having
An inorganic foam that constitutes a wall immediately below the first and second weirs and divides the outdoor space from the indoor space so as to be ventilated;
A space separating wall for separating an indoor space of the house into a first space connected to a wall immediately below the first weir and a second space connected to a wall just below the second weir;
An underfloor separation wall separating the underfloor space of the house into a first underfloor space spatially connected to the first space and a second underfloor space spatially connected to the second space;
A blower capable of blowing in forward and reverse directions, disposed on the below-floor separating wall;
A blower control unit that switches the blower direction of the blower at a predetermined timing;
A duct connecting the first space and the first under-floor space;
By blowing air from the first underfloor space toward the second underfloor space by the blower,
(1) The air supplied to the first space from the outdoor space through the inorganic foam in the wall immediately below the first weir is transported to the first underfloor space through the duct,
(2) moving the air conveyed to the first underfloor space from the first underfloor space to the second underfloor space by the blower;
(3) The air moved to the second underfloor space is moved from the second underfloor space to the second space,
(4) The air moved to the second space is exhausted to the outdoor space through the inorganic foam in the wall immediately below the second weir,
The air flow is reversed from the above (1) to (4) by switching the blowing direction of the blower and blowing air from the second underfloor space toward the first underfloor space. .

In the ventilation system of the present invention, a building having an underfloor space is divided into two spaces in the longitudinal direction by the separation wall, and a respiratory DI is made using the inorganic foam of the wall immediately below the gutter attached to each. As the air comes in and out near the roof of the building, it is easy to secure the area of the inorganic foam.
That is, the wall portions immediately below the two ridges, which are the back-to-back of the roof, are made of the inorganic foam, and the inorganic foam is opened to the ventilation layer. Air that has penetrated one of the inorganic foams is ducted below the floor of the lowest floor in a closed space so as not to mix with the other air. A fan (fan) is installed in the standup part (underfloor separation wall) of the foundation which becomes the boundary which divided the underfloor of the first floor.
When air is supplied from the wall immediately below one crucible, the air is exhausted from the wall immediately below the other crucible. The movement of the air is due to the blower under the floor, and by changing the blowing direction (venting direction) periodically, the total heat exchange function is utilized and the filter function also works.
Since the air in the room is exhausted to the outside through the inorganic foam, the heat held by the air in the room is heat-exchanged with the inorganic foam and stored in the inorganic foam.

The ventilation system according to the present invention comprises: one or more floor portions; an underfloor space defined under the lowermost floor portion of the floor portions; and a pair of opposing wall surfaces immediately below a first weir And it applies to the single-family house (house) which has the wall part directly under the 2nd pot. As an example of the wall immediately below the pot, there is a wife wall, for example.
In the following description, a two-story house will be described as an example, but if it is a house having an underfloor space, the one-story (one-story) house and a three-story or more house are also main The invention is equally applicable. Moreover, although the following description takes as an example the house which applied this invention to the end wall as a wall directly under a coffin, this invention is not limited to this.
1 to 3 are views showing an example of a house to which the ventilation system of the present invention is applied, FIG. 1 is a perspective view showing the whole appearance, and FIG. 2 is a cross section along line X ₁ -X _{1 in} FIG. FIG. 3 is a cross-sectional view taken along line X ₂ -X ₂ in FIG. 4-8 is an exploded perspective view for explaining the flow of air in the ventilation system of the present invention.
The house 1 includes a base 10, a floor (a first floor 20, a second floor 21), a wall 30, a end wall 31 (a first end wall (a wall immediately below a first weir) 31A, 2) The end wall portion (the wall portion immediately below the second weir) 31B) and the roof portion 40 are provided. A space surrounded by the foundation portion 10 and the first floor portion 20 constitutes an underfloor space 12, and a space surrounded by the floor portions 20 and 21, the roof portion 40 and the wall portion 30 is a living space (the first floor The living space 22, 2 floor of the living space 23) of Here, the ceiling plate is not stretched and the air passes to the roof portion 40, but the ceiling plate 41 may be stretched between the roof portion 40 and the living space 23 on the second floor. In this case, a space surrounded by the ceiling plate 41, the roof 40 and the end wall 31 forms an attic space 42. The living space 22 is divided by a partition wall 32 into a plurality of rooms or corridors. Moreover, the stairs (not shown) which connect the 1st floor and the 2nd floor are provided, and it is the stairs room 26. FIG. Furthermore, a through hole 27 may be provided to penetrate the first floor and the second floor.
In the following description, the inside of the house 1 including the underfloor space 12, the living space 22, and the attic space 42 described above is "indoor" and the outside of the house 1 is "outdoor".

The attic space 42 is separated from the living space 23 by the space separation wall 34. The attic space 42 forms a first space and is connected to the first end wall 31A. The living space 22 constitutes a second space, and is connected to the second end wall 31B.
The underfloor space 12 is separated by the underfloor separation wall 11 into a first underfloor space 12A and a second underfloor space 12B. Specifically, as described later, the first underfloor space 12A is spatially connected to the attic space 42 (first space) through the duct 50, and the second underfloor space 12B is spatially connected to the living space 22 (second space). Connect to The duct 50 connects the first underfloor space 12A and the attic space 42, for example, and is disposed substantially vertically.

The end wall portion 31 (the wall portion immediately below the weir) is preferably a gable wall.
In particular, in the house 1 to which the ventilation system of the present invention is applied, the roof portion 40 is a so-called gable roof in which two inclined surfaces are formed into a mountain shape. By making the roof part 40 into a gable structure, a flow of air can be formed along the slope of the roof part 40, and ventilation (especially air supply) from the end wall part 31 can be performed efficiently.

The first end wall 31A and the second end wall 31B are made of an inorganic foam that divides the outdoor space from the indoor space so as to allow air flow. The inorganic foam is placed on the outer wall of the end wall or in the vicinity thereof and is further opened to the ventilation layer of the house 1. The aeration layer leads, for example, to ventilation of the roof of the eaves and roof.
By arranging the inorganic foam in the end wall portion 31, a large area can be secured, and air supply and exhaust can be performed efficiently.
Outside air is supplied into the room through the inorganic foam disposed in the one end wall 31. At this time, the heat transferred from the room to the inorganic foam is heat-exchanged with the air for passing the inorganic foam, and the heat transferred from the room to the inorganic foam can be recovered. That is, by taking in the outside air through the inorganic foam, the outside air for venting the inorganic foam can be made the same as or similar to the temperature of the indoor space, and the fluctuation of the temperature of the indoor space can be suppressed. At the same time, fresh air can be introduced into the room to maintain high air quality.
For example, the inorganic foam has a large number of air bubbles, and when the outside air passes through the inorganic foam, contaminants contained in the outside air (for example, particulate matter such as pollen and dust) are filtered. As a result, clean air with reduced contaminants is introduced into the room.
While a normal ventilation fan installed on a wall etc. has a filter area of about several hundred cm ² , by placing an inorganic foam on the wall to perform ventilation, a large filter area of, for example, 10 m ² or more can be obtained. It is advantageous to be able to secure and to perform efficient ventilation and filtering. In addition, since the air in the room is exhausted to the outside through the inorganic foam disposed in one end wall portion 31, the heat possessed by the air in the room is heat-exchanged to the inorganic foam and stored in the inorganic foam. .

  Further, since the inorganic material which is the material of the inorganic foam has high hydrophilicity, it is possible to hold moisture inside the material by adsorption or the like. Since moisture also moves when the air moves from inside to outside, and from outside to outside through the inorganic foam, the inside humidity can be maintained. Moreover, it can also prevent that dew condensation generate | occur | produces inside inorganic foam.

  In addition, the inorganic foam is formed into a shape having a large number of micro-spaces (bubbles), which is a foam, so that the material itself becomes lighter, and it becomes possible to obtain a panel shape. For example, in the fiber-based material, since the panel shape can not be maintained and it is difficult to bear a load, it can only be placed in a filter or the like in a frame material or the like. Further, in the case of a fiber-based material, the air flow rate is large and the heat capacity is small, so that it can not be used unless the thickness is increased. On the other hand, if it is an inorganic foam, heat recovery can also be performed by itself, and the single wall which can also bear a wind load can be comprised. As described above, by using the inorganic foam, the handling property and the workability are significantly improved as compared with the fibrous material. Furthermore, because it is lightweight, it leads to a reduction in the weight of the building and also increases earthquake resistance. Further, when the outside air passes through the inorganic foam, contaminants contained in the outside air are removed by the inorganic foam, and the effect of the filter can also be expected.

  As such an inorganic foam, air-permeable inorganic heat insulating concrete (BIC) is preferable. Specifically, for example, a lightweight, air-permeable concrete having a thickness of 150 mm or less and a specific gravity of about 0.25 to 0.40 can be mentioned. According to this, there is no problem in fireproof and production.

In addition, the ventilation effect of the inorganic foam is 5 × 10 ^{−4 to 1} m ² h ⁻¹ Pa ⁻¹ and the thermal conductivity is 0.02 to 0.1 W / mK to obtain the optimum ventilation effect. And the heat recovery effect can be obtained.

  Moreover, the optimal heat recovery effect can be acquired by the heat capacity of an inorganic foam being 2-40 Kcal / degreeC.

  As shown in FIG. 4, the underfloor space 12 is separated by the underfloor separation wall 11 into a first underfloor space 12A and a second underfloor space 12B. The first underfloor space 12A is spatially connected to the attic space 42 (first space) through the duct 50, and the second underfloor space 12B is spatially connected to the living space 22 (second space).

In the ventilation system of the present invention, the attic space 42 and the first underfloor space 12A are connected by the duct 50 provided substantially vertically.
By moving the air between the attic space 42 and the first underfloor space 12A using the duct 50, the air flow on each floor becomes the same, and the difference between the rooms generated with the partition wall 32 as a boundary The pressure can be eliminated. For this reason, it is hard to produce a differential pressure in the fixture between rooms, for example, can open and close a door smoothly. In addition, since the partition wall 32 which partitions the room is not required to be airtight, the degree of freedom of the floor plan is increased.

A blower 60 is disposed on the underfloor separation wall 11 that separates the underfloor space 12 into a first underfloor space 12A and a second underfloor space 12B. The blower 60 can switch the blowing direction in the forward and reverse directions between the first underfloor space 12A and the second underfloor space 12B by a blower control unit (not shown).
In this ventilation system, air is moved between the first underfloor space 12A and the second underfloor space 12B by operating the blower 60, and one of the first underfloor space 12A and the second underfloor space 12B is decompressed. It becomes space and the other becomes pressurization space. The pressurized space has a pressure higher than the air pressure of the outdoor space, and the depressurized space has a pressure lower than the air pressure of the outdoor space.
The pressure difference between the depressurized space and the pressurized space created by the blower 60 is the power to move the air.

In the underfloor space 12, a temperature / humidity adjustment device 62 is disposed in the vicinity of the blower 60.
A temperature / humidity adjustment device 62 is installed in any of the underfloor spaces 12, particularly in the vicinity of the blower 60, to adjust the temperature and / or humidity of the air. By arranging the temperature / humidity adjustment device 62 in the narrow underfloor space 12 as compared to the living space, the temperature and / or humidity of the air to be blown can be adjusted, and the thermal efficiency is improved. Moreover, by arranging in the underfloor space 12, there is no problem of noise. As such a temperature / humidity adjustment device, a heat radiation type heating system or the like may be used, but an air conditioner is preferable from the viewpoint of efficiently cooling and heating the air.
In particular, when the building is made of RC (reinforced concrete), for example, the heat capacity of the RC can be utilized by arranging the temperature / humidity adjustment device 62 and the blower 60 in the space under the floor, and the heat storage property of the house 1 can be improved. Can.

  In addition, since the air blower 60 and the temperature and humidity control apparatus 62 are arrange | positioned to the underfloor space 12, the inspection port for the maintenance of the air blower 60 and the temperature and humidity adjustment apparatus 62 is needed. In this case, the airtightness of the inspection port is important.

The first floor portion 20 and the second floor portion 21 are respectively provided with vents 24 and 25 which are connected to the second underfloor space 12B and allow air to pass in the longitudinal direction.
The air moves between the underfloor space 12 (the second underfloor space 12B) and the living space 22 by the pressure of the blower 60 under the floor through the vents 24 and 25. Thereby, the second underfloor space 12B is spatially connected to the living space 22.
The positions at which the vents 24 and 25 are provided are not particularly limited. For example, the vents 24 and 25 may not be covered with carpet, furniture, etc. It is preferable that it is distribute | arranged.
Preferably, at least one vent 24, 25 is provided in each of the compartments, and it is preferable that the vents 24, 25 be arranged as even as possible along the outer wall when viewed from the entire floor. Thereby, air can be circulated uniformly on each floor.
In addition, if there are a step room 26 connecting the lower floor and the upper floor and the blow-through 27, these spaces play a large role in the movement of air.

The living space 22 is partitioned by the partition wall 32 into spaces such as a room and a corridor, and the partition wall 32 is provided with a communication port 33 for communicating the partitioned spaces in the lateral direction.
This allows side-by-side communication of the compartments to create a lateral air flow and allows fresh air to spread throughout the floor. Therefore, ventilation can be performed more efficiently. The position of the communication port 33 is not particularly limited. For example, it is preferable that the communication port 33 be disposed at the upper part of the partition wall 32 so as not to be covered with furniture or the like.

Next, the flow of air in the ventilation system of the present invention will be described.
<Positive direction>
First, the flow of the air in the case where the air supplied from the first end wall 31A is transported to the floor through the duct 50 and exhausted from the second end wall 31B will be described.
As shown in FIG. 4, the air is blown from the first underfloor space 12A to the second underfloor space 12B by the blower 60. As a result, the first underfloor space 12A is a depressurized space, and the second underfloor space 12B is a pressurized space. Then, air flows from the duct 50 into the first underfloor space 12A that has become a depressurized space, and in the second underfloor space 12B that has become a pressurized space, a series of air flows are generated in which air flows out from the vent 24.

That is, air is supplied from the outdoor space to the attic space 42 (first space) through the first end wall 31A (see FIGS. 2 and 8). Outside air is supplied into the room through the inorganic foam disposed in the first end wall 31A. At this time, the heat transferred from the room to the inorganic foam is heat-exchanged with the air for passing the inorganic foam, and the heat transferred from the room to the inorganic foam can be recovered.
The air supplied to the attic space 42 is transported to the first underfloor space 12A through the duct 50 (see FIG. 4).
The air conveyed to the first underfloor space 12A is moved by the blower 60 from the first underfloor space 12A to the second underfloor space 12B. At this time, the air is adjusted to an appropriate temperature and / or humidity by the temperature / humidity adjustment device 62 (see FIG. 4).

The air moved to the second underfloor space 12B moves from the second underfloor space 12B to the first floor living space 22 (second space) through the vent 24 provided in the first floor portion 20. Warm air is all supplied from the vent 24 (see FIGS. 5 and 6).
The air moved to the living space 22 on the first floor moves to the living space 23 on the second floor through the vent 25, the stair room 26 and the blow-through 27 provided in the second floor 21 (see FIGS. 3 and 7). Here, since each room on the second floor is communicated in the lateral direction by the communication port 33 provided in the partition wall 32, fresh air can be spread over the entire floor (the same applies to the first floor, too) is there).
The air that has moved to the living space 23 on the second floor is exhausted to the outdoor space through the second end wall 31B at the top of the space (see FIGS. 3 and 8). Since the air is exhausted to the outside through the inorganic foam disposed in the second end wall portion 31B, the heat held by the indoor air is heat-exchanged with the inorganic foam and stored in the inorganic foam. The exhaust from the inorganic foam is cold because it is totally heat exchanged.

Here, the blowing control unit switches the blowing direction of the blower 60 at a predetermined timing. The flow of air produced by the blower 60 is not unilateral. When the blowing direction is reversed by reversing the rotating direction of the blower 60 (fan) by the blowing control unit, the air flow (moving direction) is also reversed, and the flow is reversed.
In the indoor space, the heat of the air in the room is heat-exchanged to the inorganic foam, and the heat is stored in the inorganic foam. If this state continues for a long time, the heat exceeding the heat capacity of the inorganic foam is released outside the room. I will lose. Therefore, when the air flow control unit switches the direction of the air flow by the air blower 60, the space which is the pressurized space among the first underfloor space 12A and the second underfloor space 12B is switched to the decompression space. This also reverses the air flow. On the air supply side switched from the exhaust side, when the outside air is supplied into the room through the inorganic foam, the heat stored in the inorganic foam is heat exchanged with the outside air to be taken into the air, whereby the entire heat is obtained. It can enhance the recovery capacity. Thus, by switching the blowing direction of the blower 60, fresh air can be taken into the room in any space, and high air quality can be maintained in the entire indoor space.

The interval at which the air flow control unit reverses the driving direction of the air blower 60 in the forward and reverse directions depends on the size of the indoor space, the pressure difference between the outdoor and the indoor, the heat capacity of the inorganic foam, and the amount of air passing the inorganic foam. It is preferable to switch the blowing direction at intervals of 60 minutes or less so as not to increase the amount of heat released from the indoor space to the outdoor space. If it is a normal single-family house scale, it is preferable that it is 10 minutes or more and 30 minutes or less. If the switching time is less than 10 minutes, it may not be sufficient to reverse the air flow throughout the house. In addition, when the switching time exceeds 30 minutes, the heat released from the indoor space to the outdoor space becomes large, and the overall heat recovery capability decreases. By switching the air blowing direction at intervals of 10 minutes or more and 30 minutes or less, the air flow in the entire house can be sufficiently reversed, and the overall heat recovery capability is also improved.
In addition, the blower 60 is operated reversely to reverse the flow of air, thereby eliminating clogging of the inorganic foam and a filter function (for example, removal function of pollen etc.) originally possessed by the inorganic foam. It is thought that there is also an effect to make it last longer.
In addition, since one side of air movement is through the duct 50 at the time of forward and reverse inversion, resistance may occur in air movement. In other words, the heat exchange efficiency may be biased.

  Further, the air flow control unit variably controls the air flow rate of the air blower 60 to correspond to the upper and lower floors, the size of the indoor space, the climate, the temperature, etc., and the air amount that can be supplied and discharged through the inorganic foam. The heat recovery rate of the whole room can be improved by adjusting to a predetermined value.

  In particular, in the ventilation system of the present invention, since the potential energy of the air does not change in the space on the air supply side and the space on the exhaust side, a blower of the same capacity can be used for forward and reverse rotation.

<Reverse direction>
Next, the air supplied from the second end wall 31B is moved below the floor, and the air under the floor is transported to the attic through the duct 50, and the flow of air in the case where the air is exhausted from the first end wall 31A will be described. . In addition, although illustration is abbreviate | omitted in this case, the flow direction of air becomes a direction opposite to the direction of the arrow in FIGS.
The blower 60 blows air from the second underfloor space 12B to the first underfloor space 12A. As a result, air flows into the second underfloor space 12B that has become a depressurized space, and a series of air flows are generated that flow out of the first underfloor space 12A that has become a pressurized space.

That is, the air supplied from the outdoor space to the living space 23 (second space) on the second floor through the second end wall portion 31 B passes through the vent 25, the stair chamber 26 and the blow-through 27 provided in the second floor 21. Move to the living space 22 on the first floor through
The air moved to the first floor living space 22 moves to the second underfloor space 12 B through the vent 24 provided in the first floor portion 20.
The air moved to the second underfloor space 12B is moved by the blower 60 from the second underfloor space 12B to the first underfloor space 12A.
The air moved to the first underfloor space 12A is transported to the attic space 42 (first space) via the duct 50.
The air conveyed to the attic space 42 is exhausted to the outdoor space through the first end wall 31A.

As described above, in the ventilation system according to the present invention, it is possible to put a single piece of breathing type DI into practical use by forming the wall portions immediately below the pair of weirs from the inorganic foam. According to this, it is possible to realize energy saving by excellent heat insulation performance without the need for complicated duct piping, and at the same time as improving the air quality by introducing fresh air into the room, it is also possible to reduce the heat loss at the time of exhaustion. it can.
In addition, in the present system, since the flow of air in each floor is the same, differential pressure between rooms is unlikely to occur. For this reason, airtightness is not required for the partition wall which divides a room, but the freedom of a floor plan becomes high.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to this, It can change suitably in the range which does not deviate from the meaning of invention.

  By using the ventilation system according to the present invention, there is no need for complicated duct piping, energy saving can be realized by the excellent heat insulation performance, and at the same time the air quality is improved by the introduction of fresh air into the room Loss reduction can be realized and can be widely used as a ventilation system in a single-family house or other building having an underfloor space.

1: House 10: Foundation 11: Below-floor separating wall 12: Under-floor space 12 A: First-floor space 12 B: Second-floor space 20: First floor 21: Second floor 22: living space (first floor)
23: Living space (2nd floor)
24, 25: vent 26: step room 27: blow through 30: wall 31: wife wall 31A: first wife wall (wall immediately below the first weir)
31B: 2nd wife's wall (wall immediately below the 2nd pot)
32: Partition wall 33: Communication port 34: Space separation wall 40: Roof portion 41: Ceiling plate 42: Attic space 50: Duct 60: Blower 62: Temperature and humidity adjustment device

Claims (10)

One or more floor portions, and the floor portion of the floor portion defined under the lowermost floor portion, and a pair of opposing wall portions immediately below the first weir and the second weir directly A ventilation system applied to a house having a wall,
An inorganic foam that constitutes a wall immediately below the first and second weirs and divides the outdoor space from the indoor space so as to be ventilated;
A space separating wall for separating an indoor space of the house into a first space connected to a wall immediately below the first weir and a second space connected to a wall just below the second weir;
An underfloor separation wall separating the underfloor space into a first underfloor space spatially connected to the first space, and a second underfloor space spatially connected to the second space;
A blower capable of blowing in forward and reverse directions, disposed on the below-floor separating wall;
A blower control unit that switches the blower direction of the blower at a predetermined timing;
A duct connecting the first space and the first under-floor space;
By blowing air from the first underfloor space toward the second underfloor space by the blower,
(1) The air supplied to the first space from the outdoor space through the inorganic foam in the wall immediately below the first weir is transported to the first underfloor space through the duct,
(2) moving the air conveyed to the first underfloor space from the first underfloor space to the second underfloor space by the blower;
(3) The air moved to the second underfloor space is moved from the second underfloor space to the second space,
(4) The air moved to the second space is exhausted to the outdoor space through the inorganic foam in the wall immediately below the second weir,
The air flow is reversed from the above (1) to (4) by switching the blowing direction of the blower and blowing air from the second underfloor space toward the first underfloor space. Ventilation system.   The ventilation system according to claim 1, wherein the first space is an attic space.   The ventilation system according to claim 1, wherein the ducts are disposed substantially vertically.   The ventilation system according to any one of claims 1 to 3, wherein the wall immediately below the first and second weirs is a end wall.   The ventilation system according to any one of claims 1 to 4, wherein the inorganic foam is a breathable inorganic heat insulating concrete (BIC).   The ventilation system according to any one of claims 1 to 5, wherein the blower control unit switches the blower direction of the blower every 60 minutes or less.   The ventilation system according to any one of claims 1 to 6, further comprising a temperature / humidity adjustment device disposed in the vicinity of the blower in the underfloor space.   The ventilation system according to any one of claims 1 to 7, wherein the floor portion is provided with a vent for passing air in a longitudinal direction.   The communication system according to any one of claims 1 to 8, wherein the indoor space is partitioned by a partition wall, and the partition wall is provided with a communication port for horizontally communicating the partitioned spaces. Ventilation system as described.   A house provided with the ventilation system according to any one of claims 1 to 9.

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