JPH11159825A - Air circulation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove the energy loss in air transfer, and perform the control of amount of supply to each space, by taking in underfloor air from the bottom, and raising it within a ventilating trunk piercing a building vertically, and supplying the underfloor air into the space within the building from the air inlet at the side of the ventilating trunk. SOLUTION: A ventilating trunk pipe 2 is arranged to piece a building vertically, and an underfloor opening is made at the bottom of the ventilation trunk pipe 2, and it is opened in the underfloor space 7 of the building 1. Moreover, an air inlet 3 is provided at the side of the ventilating trunk pipe 2. In the case that the ventilating trunk pipe 2 is arranged within the wall 5 of the building 1 and the air inlet 3 is provided only on one side, underfloor air is supplied directly from the ventilating trunk pipe 2 to one space 4 out of the space partitioned by the wall. Moreover, in the case that air inlets 3 are provided on both sides of the ventilating trunk pipe 2, the unerfloor air is supplied directly from the ventilating trunk pipe 2 to each space 4 on both sides of the wall 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology relating to an air circulation system utilizing under-floor air in a building.

[0002]

2. Description of the Related Art Conventionally, in order to air-condition each space 4 in a building 1, a ventilation port 70 communicating with the underfloor space 7 is formed in a floor surface or a rising portion of a stair as shown in FIG. In winter, it is relatively warm compared to outside air,
In the summer, the underfloor air in the underfloor space 7, which is relatively cooler than the outside air, is supplied to the space 4 in the building 1, but the underfloor air is supplied to the space 4 in the building 1, The circulating device 71 that performs the circulation in the space 4 is a device separate from the circulating device 71.

[0003] For this reason, conventionally, the number of devices has increased and the construction has been troublesome. It is also conceivable to supply the underfloor air by a duct branched from a branch pipe. However, in this case, there are problems such as a large energy loss of air transfer, poor efficiency, and unstable supply control.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and eliminates the energy loss of air transfer, stably controls the supply amount to each space. Another object of the present invention is to provide an air circulation system in which the supply of underfloor air and the circulation device are shared so that the device can be shared and the construction is simplified.

[0005]

In order to solve the above-mentioned problems, an air circulation system according to the present invention takes in air under the floor from a lower end and arranges a ventilation main pipe 2 which is disposed so as to penetrate vertically in a building 1. The inside of the building 1 is raised, and underfloor air is supplied to a space 4 in the building 1 from an air supply port 3 formed on a side surface of the ventilation main pipe 2. By adopting such a configuration, the inside of the building 1 is formed via the ventilation main pipe 2 that is disposed in the building 1 so as to penetrate vertically in the building 1 without passing through the branch pipe that branches the underfloor air of the underfloor space 7. Can be directly supplied to the space 4.

It is preferable that air above the space 4 in the building 1 be taken into the ventilation trunk 2 and supplied to the space 4 or another space 4 from the ventilation trunk 2. With such a configuration, the warm air that has risen to the upper part of the space 4 in the heating state can be circulated to the lower part of the space via the ventilation main pipe 2. In addition, it is preferable that the air taken in from the underfloor air together with the upper air of the space 4 in the building 1 sucked into the ventilation main pipe 2 is simultaneously supplied from the ventilation main pipe 2 to the space 4 or another space 4. With this configuration, it is possible to supply air fresh from the underfloor air while performing air circulation.

Further, it is preferable that there are a plurality of spaces 4 to be supplied with air from the ventilation main pipe 2, one of which is a living room space 4a and the other is a common space 4b. With such a configuration, the underfloor air can be supplied to the living room space 4a and the common space 4b, and the entire air circulation in the building 1 can be performed by supplying the underfloor air to the common space 4b. become.

Further, the building 1 equipped with the ventilation main pipe 2 has a plurality of floors, and is provided under the floor from the air supply port 3 formed on the side surface of the ventilation main pipe 2 in both upper and lower layers to each space 4 in the building 1. Preferably, air is supplied. With such a configuration, it is possible to directly supply each space in the upper and lower layers of the multi-level building 1 to each space 4 in the building 1 via the ventilation main pipe 2. .

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments shown in the accompanying drawings. As shown in FIGS. 1 to 3,
The ventilation main pipe 2 penetrates vertically in the building 1, and this ventilation main pipe 2 may be disposed independently in the space 4 of the building 1 vertically penetrating. In the embodiment shown in the accompanying drawings, an example is shown in which the inside of the wall 5 of the building 1 is vertically penetrated.

A lower floor opening 6 is provided at the lower end of the ventilation main pipe 2.
Are formed and open to the underfloor space 7 of the building 1. An air supply port 3 is provided on a side surface of the ventilation main pipe 2. In providing the air supply port 3 in the ventilation main pipe 2, there are a case where the air supply port 3 is provided only on one side surface of the ventilation main pipe 2 and a case where the air supply port 3 is provided on both side faces of the ventilation main pipe 2. is there. In other words, in the case where the ventilation main pipe 2 is arranged in the wall 5 of the building 1, in the case where the air supply port 3 is provided only on one side surface, one of the spaces 4 partitioned by the wall 5 is used. 4 is configured to supply the underfloor air directly from the ventilation main pipe 2, and in the case where the air supply ports 3 are provided on both side surfaces of the ventilation main pipe 2, each space 4 on both sides of the wall 5 is provided. The underfloor air is supplied directly from the ventilation main pipe 2.

In providing the air supply port 3 on the side surface of the ventilation main pipe 2, an upper air supply port 3 a and a lower air supply port 3 b are provided on the upper and lower sides of the side surface of the ventilation main pipe 2, respectively. Alternatively, the air supply port 3c may be provided in either the lower part or the substantially central part. FIGS. 2 and 3 show examples of plan views of the building 1. In a portion A of FIG. 2, a living room space 4 such as a living dining room which is one of the spaces 4 of the building 1 is shown.
a and the ventilation main pipe 2 is inserted into a wall 5 partitioning both the common space 4b such as a corridor or a staircase, and is disposed through the air supply ports 3 provided on both sides of the ventilation main pipe 2. 3 shows an example in which the underfloor air is directly supplied to both the living room space 4a and the common space 4b. In the part B in FIG. An example is shown in which underfloor air is directly supplied from a supply port 3 provided on one side surface to a living room space 4a such as a living dining room. In the part C of FIG. 3, the air supply port 3 provided on one side surface of the ventilation main pipe 2 vertically penetrated into the wall 5 is provided to a common space 4 b such as a corridor or a staircase. An example in which air is directly supplied is shown.

FIG. 4 to FIG. 9 show an embodiment of the ventilation main pipe 2. The ventilation main pipe 2 is mainly composed of a main body 10 having a U-shaped cross section and a side cover plate 11 attached to a side opening of the main body 10. The partition plate 13 is provided, and the lower partition plate 1 is provided.
A fan device 14 for underfloor air intake is attached to the lower surface of 3. A lower air supply port 3b is provided at a position immediately above the lower partition plate 13 of the side cover plate 11. Further, a lower damper block 15 is mounted on the upper surface side of the lower partition plate 13, and this lower damper block 15 is made to correspond to the lower air supply port 3b.

As shown in FIG. 8, the lower damper block 15 has a damper plate 40 rotatably supported by a shaft 42 on a damper housing 40, and is rotatably provided on the damper housing 40 by a shaft 43. A pressing portion 45 at the tip of the operating lever 44 is configured to be able to abut on the damper plate 41. As shown in FIG. 9, the pressing plate 45 is an arc-shaped portion 46 whose outer peripheral edge is formed in an arc shape, and the distance from the shaft 43 increases from one end of the arc-shaped portion 46 to the other end. By operating the operation lever 44, the contact position of the arc-shaped portion 46 with the damper plate 41 is changed, so that the position of the damper plate 41 is changed from the position of the solid line in FIG. It is freely rotatable in the range up to and can be held at an arbitrary rotation angle.

An auxiliary damper plate 47 is further rotatably mounted on the upper end of the side opening of the damper housing 40 by a shaft 48, and the auxiliary damper plate 47 is mounted on a lower end of the auxiliary damper plate 47 by a shaft 49. It is slidably fitted into a long hole 50 provided on the side. Therefore, the damper plate 4
1 is rotated about the shaft 42, the auxiliary damper plate 47
The shaft also rotates about the shaft 48, and a guide bent in a letter-like shape is formed by the lower part of the damper plate 41 and the auxiliary damper plate 47 to change the flow of air under the floor and to be smoothly supplied to the lower air supply port 3b. It is so. When the damper plate 41 is a solid line in FIG. 8, the underfloor air is supplied to the upper part of the space 4 only from the upper air supply port 3a. When the damper plate 41 is in the imaginary line in FIG. 8, the underfloor air is supplied to the lower part of the space 4 only from the lower air supply port 3b. When the damper plate 41 is located between the solid line and the imaginary line in FIG. 8, the underfloor air is supplied to the upper and lower parts of the space 4 from both the upper supply port 3a and the lower supply port 3b. In this case, the operating lever 44
Is operated to adjust the rotation angle of the damper plate 41, so that the amount of air supplied from the upper air supply port 3a and the lower air supply port 3b
It is possible to adjust the ratio with the amount of air supplied from the air conditioner.

The lower air supply port 3b is provided with a wind direction adjusting device 51. By operating an adjustment lever 52, the supply direction of the underfloor air supplied from the lower air supply port 3b to the space 4 can be varied in a horizontal plane. Can be adjusted in the direction of. Further, an upper partition plate 17 having an opening 16 is provided at an upper portion in the main body 10, and a fan device 18 for circulation is mounted on an upper surface of the upper partition plate 17. A suction port 19 for circulation is provided at a position just above the upper partition plate 13 of the side cover plate 11.
The upper air supply port 3 a is provided at a position immediately below the upper partition plate 13 of the side cover plate 11. Further, another upper air supply port 3a is provided immediately below the upper partition plate 13 of the upper part of the main body 10 having a U-shaped cross section (air supply is provided only to one side surface of the ventilation main pipe 2). In the case where the port 3 is provided, another upper air supply port 3a is not provided in the main body 10). An upper damper block 20 is mounted in the main body 10 directly below the upper partition plate 17, and the upper damper block 20 faces the upper air supply port 3 a provided in the side cover plate 11.
Here, when another upper air supply port 3 a is provided in the main body 10, the upper damper block 20 also faces another upper air supply port 3 a provided in the main body 10.

As shown in FIG. 5, the upper damper block 20 includes an under-floor air supply guide 22 which protrudes from one side of the upper end of the vertical plate portion 21 obliquely upward to one side, and a vertical plate portion. Another underfloor air supply guide 23 which protrudes in an arc shape diagonally upward from the other one side of the upper end of the other side to the other side,
A circulation guide 24 protrudes obliquely upward from the upper end of one arc-shaped underfloor air supply guide 22 toward the other side. In the case where the air supply port 3 is provided only on one side surface of the ventilation main pipe 2, the upper damper block 2
Reference numeral 0 denotes a vertical plate portion 21, an underfloor air supply guide 22, and a circulation guide portion 24. A bent portion 2 formed by one underfloor air supply guide 22 and a circulation guide 24.
The upper air supply port 3a is provided at the approximate center of the upper air supply port 3a provided in the side cover plate 11 in the vertical direction, and the upper air supply port 3a is divided into two at the bent portion 25 in the vertical direction. The other underfloor air supply guide 23 protrudes above the one underfloor air supply guide 22 and is located at the upper end of another upper supply port 3a provided in the upper part of the main body 10.

The upper air supply port 3a, the lower air supply port 3b, and the circulation suction port 19 are provided with a limp 53. Here, the main body 10 is disposed inside the wall 5 of the building 1,
By being fixed to the stud 26 with a fixing tool, it is vertically inserted into the wall 5 and disposed. A lower frame 28 having a net 27 is attached to the lower opening of the main body 10 so that insects and the like do not enter the ventilation main pipe 2 from the space below the floor. It communicates with the underfloor space 7 through the opening 29a provided.

FIG. 10 (a) shows a floor panel 31 on a foundation 30.
Of the floor is constructed by mounting the floor with a mounting bracket (not shown). The space between the floor panel 31 and the foundation 30 and the space between the adjacent floor panels 31 are connected to the underfloor space 7. This is an example in which the lower opening of the ventilation main pipe 2 communicates. In FIG. 10B, a large undertaking member 32 is fixed to the side surface of the foundation 30, a large undertaking 33 is mounted on the large undertaking member 32, and a floor material 34 is placed on the large undertaking 33. In this case, the floor material 34 and the foundation 30 are provided.
This is an example in which the underfloor space 7 and the lower opening of the ventilation main pipe 2 communicate with each other via a gap between the floor material 34 and a gap between adjacent floor materials 34.

In the embodiment shown in the accompanying drawings, the side cover plate 11 of the ventilation main pipe 2 has an arc-shaped cross section and is exposed to one space 4 in the vertical direction. In addition, another upper air supply port 3a provided in the upper part of the main body 10 is opened on the wall surface of the wall 5 opposite to the side cover plate 11. In this embodiment, when the circulation fan device 18 is stopped and only the underfloor suction fan device 14 is operated, the underfloor air in the underfloor space 7 is discharged from the ventilation main pipe 2.
Is supplied to the space 4 from the air supply port 3 provided on the side surface of the air conditioner. In this case, when the air supply port 3 is provided only on one side surface of the ventilation main pipe 2, the underfloor air is supplied to one space 4 as shown in FIGS. When the air supply ports 3 are provided on both side surfaces, the underfloor air is supplied to the spaces 4 on both sides as shown in FIGS. When the upper air supply port 3a and the lower air supply port 3b are provided above and below the side surface of the ventilation main pipe 2, the operation lever 4
4 to operate the damper plate 41 of the lower damper block 15.
11, the underfloor air is supplied from both the upper air supply port 3 a and the lower air supply port 3 b to the upper and lower parts of the corresponding space 4, or as shown in FIGS. 12,
As shown in FIGS. 13, 19, and 20, underfloor air is supplied from one of the upper air supply port 3a and the lower air supply port 3b to either the upper or lower part of the corresponding space 4.

On the other hand, the fan device 18 for circulation is operated,
When the underfloor intake fan device 14 is stopped, the underfloor air is not forcibly supplied, and as shown in FIGS.
The air in the upper part of the corresponding space 4 is sucked into the ventilation main pipe 2 from the suction inlet 19 for circulation, and is directed obliquely downward by the circulation guide 24 which is inclined obliquely downward toward the upper air supply port 3a. Is supplied from the upper half of the upper air supply opening 3a to the lower part of the corresponding space 4 in a state where the directivity of the wind is given, whereby warm air above the relevant space 4 is supplied to the ventilation main pipe 2. Can be circulated to the lower level of the corresponding space 4 via.

When both the circulation fan device 18 and the underfloor suction fan device 14 are operated, the air above the corresponding space 4 flows from the circulation suction port 19 into the ventilation main pipe 2. 15 to 17 and FIG.
As shown in FIGS. 2 to 24, the upper air supply port 3a is obliquely downwardly inclined by the circulation guide 24 inclined downward and downward toward the upper air supply port 3a. The air is supplied from the upper half toward the lower part of the corresponding space 4. At this time, fresh underfloor air is simultaneously supplied, and the operation lever 44 is operated to operate the lower damper block 15.
By rotating the damper plate 41, as shown in FIG. 16 and FIG. 23, the underfloor air is supplied from both the upper supply port 3a and the lower supply port 3b to the upper and lower portions of the corresponding space 4. Alternatively, as shown in FIGS. 15, 17, 22, and 24, the underfloor air flows from one of the upper air supply port 3 a and the lower air supply port 3 b to one of the upper or lower part of the corresponding space 4. Supplied. In this case, when fresh underfloor air is supplied from the lower half of the upper air supply port 3a, the upper air supply port 3a
From the lower half of the upper air supply port 3a and mixed with the circulating room air blown obliquely downward from the upper half of the upper air supply port 3a and supplied to the lower part of the space 4. Accordingly, the room air can be circulated by blowing diagonally downward while the underfloor air above the fresh space 4 and the warm air are mixed with each other, so that more comfortable and appropriate ventilation can be achieved. .

In the above-described embodiment, by operating the circulation fan device 18, the warm air above the one space 4 is supplied to the lower space of the one space 4 via the ventilation main pipe 2 so as to supply the warm air. In the example, the air in the space 4 is circulated so that the human body can be comfortably heated.
However, the present invention is not limited to this. By operating the fan device 18 for circulation, warm air above one space 4 is supplied to the lower space of the other space 4 via the ventilation main pipe 2, whereby The warming air above the space 4 may be used to heat the other space 4 so that the human body can be comfortably heated.

When the operation of the circulation fan device 18 is stopped and the operation of the underfloor intake fan device 14 is stopped, the underfloor air is naturally circulated through the underfloor intake fan device 14 by natural circulation. Air is supplied to the space 4 from an air supply port 3 provided on the side surface of the ventilation main pipe 2 through the air pipe 2. FIG. 1 shows an overall schematic diagram of an air circulation system of the present invention. Of the underfloor air supplied to each space 4 from an air supply port 3 provided on a side surface of a ventilation main pipe 2, a corridor or a staircase is used. The under-floor air supplied to the common space 4b flows through the common space 4b, and is ventilated through a gallery opening 60 such as a door of the living room space 4a in contact with the common space 4b. In particular, it is possible to smoothly ventilate the upper floor space 4 through the staircase. In FIG. 1, reference numeral 61 denotes a ventilation gallery for ventilating each space 4. The ventilation gallery 61 is of a type that exhausts the air in the space 4 in the building 1 to the outside, or exhausts the air in the space 4 in the building 1 to the outside and simultaneously releases fresh air from the outside to the space 4. Any of the air supply / exhaust type that suctions air to the side may be used. The arrows in FIG. 1 indicate the flow of air.

Next, another embodiment of the present invention will be described with reference to FIG. That is, this embodiment is an example in which the ventilation main pipe 2 is provided so as to penetrate both upper and lower levels in the building 1 having a plurality of floors. In FIG. 25, 62 indicates the first floor portion, and 63 indicates the second floor portion. Also in this embodiment, the underfloor air of the underfloor space 7 is taken in from the lower end of the ventilation main pipe 2 arranged in a vertically penetrated state in the building 1, and the inside of the ventilation main pipe 1 is raised.
Underfloor air is supplied to both upper and lower spaces 4 in the building 1 from an air supply port 3 formed on a side surface of the ventilation main pipe 2 in both upper and lower layers. The underfloor air intake fan device 14 is provided in the ventilation main pipe 2 disposed in a state penetrating both upper and lower layers in the building 1 having a plurality of floors, and the underfloor air intake fan device 14 is operated to operate the airflow. Forcing the underfloor air into the space 4 from the air supply port 3 through the main pipe 2,
Stopping the operation of the underfloor intake fan device 14 and supplying the underfloor air from the air supply port 3 by natural ventilation is the same as in the above-described embodiment. 18 and the upper air in the space 4
The air is supplied to the space 4 or the lower space of the other space 4 from the ventilation main pipe 2 in the same manner as in the above-described embodiment, and the underfloor intake fan device 14 and the circulation fan device 18 are provided. In the above-described embodiment, the operation of both of them, the operation of either one of them, and the rotation of the damper plate 41 of the lower damper block 15 to adjust the ventilation amount and select the flow to be ventilated are described. Is the same as

With such a configuration, it is possible to directly supply the spaces 4 in the upper and lower layers of the multi-level building 1 to the respective spaces 4 in the building 1 via the ventilation main pipes 2. Things.

[0026]

According to the first aspect of the present invention, as described above, the air under the floor is taken in from the lower end, and rises inside the ventilation main pipe arranged vertically penetrating inside the building. Since the underfloor air is supplied to the space in the building from the air supply port formed on the side surface of the ventilation trunk, the ventilation trunk penetrates the underfloor air vertically in the building without passing through the branched branch pipe. It can be directly supplied to the space in the building through the pipe, the energy loss of air transfer is small, the supply amount to the space can be controlled stably, and the system can be easily maintained. Things.

According to the second aspect of the present invention, in addition to the effects of the first aspect of the present invention, air above the space in the building is taken into the ventilation main pipe and the space or Since it is supplied from the ventilation main pipe to the lower part of the other space, in the heating state, the warm air rising to the upper part of the space can be circulated to the lower part of the space, so that it is possible to provide comfortable heating for the human body and improve the heating efficiency. Things.

According to the third aspect of the present invention, in addition to the effect of the second aspect of the present invention, air is taken in from the underfloor air together with the upper air in the space in the building that has been sucked into the ventilation main pipe. Since air is simultaneously supplied from the ventilation main pipe to the space or another space, it is possible to supply air fresh from the underfloor air while circulating the air, so that the space can be provided with comfortable and proper ventilation. In addition, the supply and circulation of the underfloor air can be performed by a common ventilation main pipe. As a result, the equipment can be shared and the construction can be simplified.

According to the invention described in claim 4, in addition to the effects of the invention described in any one of claims 1 to 3, there are a plurality of spaces to be supplied with air from the ventilation main pipe. Since one is a living room space and the other is a common space, underfloor air can be supplied to both the living room space and the common space. Also, in the case of circulating warm air located in the upper part of the space to the lower part of the space, air can be circulated throughout the building.

According to a fifth aspect of the present invention, in addition to the effects of the first to fourth aspects of the present invention, the building equipped with the ventilation trunk has a plurality of floors. ,
Underfloor air is supplied to each space in the building from the air supply port formed on the side of the ventilation main pipe on both upper and lower levels, so that underfloor air can be supplied on both upper and lower levels of buildings on multiple floors It is. Further, in the air circulating to the lower part of the space of the warm air which has risen to the upper part of the space, the air circulation in the whole multi-story building can be performed by the ventilation main pipe.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing an entire air circulation system according to an embodiment of the present invention.

FIG. 2 is a plan sectional view of one embodiment showing a plan of a building using the air circulation system according to the first embodiment;

FIG. 3 is a cross-sectional plan view of another embodiment of a plan for a building using the air circulation system of the above.

FIG. 4 is a partially omitted exploded perspective view of the ventilation main pipe used in the same.

FIG. 5 is a longitudinal sectional view of the ventilation main pipe of the above.

FIG. 6 is a front view showing a state where the side cover plate is removed.

FIG. 7 is a front view showing a state where the side cover plate is attached.

FIG. 8 is a longitudinal sectional view of a lower damper block part of the above.

FIG. 9 is a cross-sectional view of a lower damper block of the above.

10 (a) and 10 (b) are explanatory views of examples showing the flow of underfloor air from the underfloor space to the ventilation main pipe.

FIG. 11 is an explanatory diagram of an example showing a flow of air through the ventilation main pipe of the above.

FIG. 12 is an explanatory view of another example showing the flow of air through the ventilation main pipe of the above.

FIG. 13 is an explanatory view of still another example showing the flow of air through the ventilation main pipe of the above.

FIG. 14 is an explanatory view of still another example showing a flow of air through the ventilation main pipe of the above.

FIG. 15 is an explanatory view of still another example showing a flow of air through the ventilation main pipe of the above.

FIG. 16 is an explanatory view of still another example showing the flow of air through the ventilation main pipe of the above.

FIG. 17 is an explanatory view of still another example showing a flow of air through the ventilation main pipe of the above.

FIG. 18 is an explanatory view of still another example showing the flow of air through the ventilation main pipe of the above.

FIG. 19 is an explanatory view of still another example showing a flow of air through the ventilation main pipe of the above.

FIG. 20 is an explanatory view of still another example showing the flow of air through the ventilation main pipe of the above.

FIG. 21 is an explanatory view of still another example showing a flow of air through the ventilation main pipe of the above.

FIG. 22 is an explanatory view of still another example showing the flow of air through the ventilation main pipe of the above.

FIG. 23 is an explanatory view of still another example showing the flow of air through the ventilation main pipe of the above.

FIG. 24 is an explanatory view of still another example showing a flow of air through the ventilation main pipe of the above.

FIG. 25 is a schematic sectional view of another embodiment of the present invention.

FIG. 26 is a schematic sectional view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Building 2 Ventilation main pipe 3 Air supply port 4 Space 4a Living room space 4b Common space 5 Wall 7 Underfloor space

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kazuhisa Nagata 1-1-4 Shinsenri Nishimachi, Toyonaka-shi, Osaka National Housing Industry Co., Ltd.

Claims (5)

[Claims] 1. An underfloor air is taken in from a lower end, and the inside of a ventilation main pipe arranged vertically penetrating in a building is raised. An air circulation system for supplying under-floor air to a space. 2. The air circulation according to claim 1, wherein upper air in a space in the building is taken into the ventilation main pipe and supplied to the lower space of the space or another space from the ventilation main pipe. system. 3. The air taken in from the underfloor air together with the upper air in the space in the building that has taken in the ventilation main pipe, is supplied from the ventilation main pipe to the space or another space at the same time. The described air circulation system. 4. There are a plurality of spaces for supplying air from the ventilation main pipe,
The air circulation system according to any one of claims 1 to 3, wherein one is a living room space and the other is a common space. 5. A building equipped with a ventilation main pipe having a plurality of floors, and supplying underfloor air to each space in the building from an air supply opening formed on a side surface of the ventilation main pipe in both upper and lower levels. The air circulation system according to any one of claims 1 to 4, wherein: