JPH0133616B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rooftop slab air cooling construction method and a building using the construction method.

The rooftops and roofs of buildings such as condominiums are exposed to direct sunlight, resulting in extremely high temperatures (approximately 70 degrees Celsius), especially in the summer.The heat accumulated on the roofs causes the room temperature on the top floor to become extremely high. This significantly worsened livability. In order to prevent such high temperatures on the top floor, the following construction methods have been used in the past.

The method of pasting insulation material on the roof surface, and the method of pasting insulation material on the indoor ceiling surface. However, with these methods, the insulation material pasted on the roof surface deteriorates and is easily damaged by solar heat, wind and rain, and with the other method, the roof slab itself The problem is that the roof slab itself tends to deteriorate due to the expansion and contraction of the roof slab due to temperature changes, which can cause cracks in the roof slab.

The present invention aims to solve the problems of the conventional construction method for preventing the room temperature on the top floor of a building from becoming too high.

That is, the present invention applies to the building 1 as detailed below.
Laying the rooftop slab board 2 on the roof or roof of
The rooftop slab board 2 forms an air circulation layer 5 that communicates from the sunny side to the shaded side, and in summer, low-temperature air from the shaded side is introduced into the air circulation layer 5 to cool the rooftop slab. It is something.

With such a configuration, the present invention aims to prevent the roof slab of the building 1 from becoming hotter by utilizing the upward airflow a generated on the sunny surface without requiring energy, especially in the summer.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention illustrated in the drawings will be described.

First, a first embodiment shown in FIGS. 1 and 2 will be described.

In Figures 1 and 2, 1 is a concrete building, and a rooftop slab board 2 is attached to the roof of the building 1 with support 4.
Support with. In FIG. 2, 3 is the top floor slab. Thus, an air layer 5 is formed between the top floor slab 3 and the roof slab board 2, which communicates from the south side on the sunny side in general to the north side on the shaded side in general. The south side of the air circulation layer 5 is a discharge port 6, and the north side is a suction port 7. The interval between the rooftop slab board 2 and the top floor slab 3 forming the air circulation layer 5 is in the range of 5 to 200 cm,
Preferably it is 3 to 10 cm.

A discharge air rectifying/lid plate 8 having a shape for sucking out the air in the air circulation layer 5 to the outside is provided on the front surface of the discharge port 6 in an upwardly inclined manner. The angle of inclination α is in the range of 10° to 45°. If the angle of the exhaust air rectifier/cover plate 108 with respect to the horizontal plane is 15 degrees or less, for example 5 degrees, as shown in FIG. A collision state occurs, generating turbulence, which causes the air circulation layer 10 to
Negative pressure cannot be applied to the air at the air outlet 106 of No. 5. Therefore, the air circulation layer 105
It cannot exert suction force against the air flow d inside.

On the other hand, when the angle exceeds 45 degrees, the upward air current rises along the cover plate 108 as shown in FIG. The portion passes over the cover plate 108, enters the discharge port 106 portion of the air circulation layer 105, and collides with the air flow d within the air circulation layer 105.

Therefore, if the angle of inclination exceeds 45 degrees, the air circulation in the air circulation layer 105 will be hindered.

If the inclination angle is 45 degrees or less, the upward airflow is directed to be discharged along the lower surface of the cover plate, so it does not immediately go over the cover plate and applies positive pressure to the outlet area. Never.

In the present invention, for the above-mentioned reasons, the angle of the exhaust air rectification/cover plate with respect to the horizontal plane is set as described above.

Also, on the back of the suction port 7 is a suction air rectifier/cover plate 9.
is installed on a downward slope. The angle of inclination is in the range of 10° to 90°, preferably 30° to 60°. Note that since the discharge air and suction air rectifying/lid plates 8 and 9 are closed during the winter as will be described later, they are formed to be swingable so that the discharge port 6 and the suction port 7 can be opened and closed.

Next, its effect will be explained.

In summer, the exterior wall and roof slab on the sunny side (south side) of the building 1 become extremely hot, and a strong upward air current a is generated along the exterior wall on the sunny side. Furthermore, as the temperature of the rooftop slab 2 itself increases, a large amount of heat is accumulated in the air layer 5.

When the rising air flow a hits the exhaust air rectifier/cover plate 8, the exhaust air rectifier/cover plate 8 generally has an angle of 15° to
Since it has an upward slope of 45 degrees, the air at the discharge port 6 becomes thinner, causing a partial pressure drop. In other words, the rising air current a rises along the upwardly inclined surface of the exhaust air rectifying/lid plate 8.

Moreover, when the air above the rooftop slab 2 becomes high temperature, it simultaneously becomes an upward air current b. As the rising air currents a and b rise, the air in the discharge port 6 is sucked, and a negative pressure is generated in this part. In this way, the air in the portion of the discharge port 6 is sucked out by the rising air currents a and b, and becomes the rising air current c.

When an upward air current c is generated in the discharge port 6 portion, low-temperature air from the north side is sucked through the suction port 7 of the air circulation layer 5. The low-temperature air on the north side is guided to the suction air rectifier/cover plate 9 provided at the rear of the suction port 7,
A large amount of air from the shaded surface is introduced into the air layer 5.

In this way, low-temperature air from the shaded surface can be continuously flowed through the air layer 5 during the summer sunshine hours.
In general, the rooftop slab air cooling method of the present invention works particularly effectively when the air temperature on the sunny side is 70°C and the air temperature on the shaded side is about 30°C. As a result, it is possible to prevent the rise in room temperature directly under the roof due to the rapid temperature rise of the roof slab in the summer, and the deterioration due to expansion and contraction of the roof slab due to rapid temperature changes between day and night.

In seasons other than summer, if the exhaust port 6 and the suction port 7 are closed, overcooling of the rooftop slab is prevented, and the air layer 5 functions as an air heat insulating layer.

Note that as a method of providing the air layer 5, a thick roof slab 2a may be laid on the roof of the building 1, and a large number of tunnel-like communication holes 5a may be bored in the roof slab 2a. The tunnel-like communication hole 5a has a diameter of 5 to 200 cm, preferably 3 to 10 cm, and is closely spaced over the entire width of the cross-sectional length L of the building 1.

As shown in Figure 2, if the air layer 5 is tilted slightly downward (1/300 to 1/20 radian) from the exhaust port 6 side, the upward force of high-temperature air will increase and the air exhaust capacity can be increased. .

In addition, the exhaust air rectifier/cover plate 8 and the top floor slab 3
If a gap S (Fig. 2) is left between the two, there is an advantage that rainwater can be drained away.

Furthermore, if a central exhaust port 10 is also provided in the center of the rooftop slab board 2 as shown in FIG.
This allows the high temperature air in the air layer 5 to be exhausted.

Reference numeral 11 denotes a rectifying plate, which is provided so that as the ascending air current d rises, the central exhaust air rectifying/lid plate 8 similarly causes the ascending air current d to suction air from the central exhaust port 10 portion. Generally, it is preferable to have a V-shape as shown in FIG.

In addition, in this case, most of the air is at the central outlet 10.
If it is discharged from the central discharge port 10 and the discharge port 6, the uppermost floor slab 3 in the area between the central discharge port 10 and the discharge port 6 will not be cooled. Therefore, the distance between the center baffle plate 11 and the outlet 10 is adjusted so that the amount of air rising from the outlet 6 and the center outlet 10 is appropriately distributed.
It is necessary to adjust the distance between the discharge port 6 and the discharge air rectifier/cover plate 8 as appropriate. Therefore, the central current plate 11 is provided so as to be movable up and down so as to open and close the central discharge port 10.

If a heat insulating material 12 (Fig. 2) such as glass wool is installed on the ceiling of the room on the top floor, the heat retention effect in winter will be further improved.

Effects of the present invention Utilizing the energy of strong updrafts in summer that occur along the outer wall of the sunny side of the building 1,
Summer roof slab cooling allows removal of summer heat build-up on the roof without the need for natural energy.

Therefore, energy for indoor cooling, etc. can be saved.

(b) In the present invention, since the discharge air rectifying/cover plate 8 is provided with an upward slope of 15° to 45° with respect to the horizontal plane of the discharge port 6, the upward airflow a generated along the outer wall on the south side is As a result of the air rising in a rectified state along the upwardly inclined surface of the air rectifying/lid plate 8, a negative pressure is generated in the discharge port 6 portion, and the air in the air circulation layer 5 portion is guided into this negative pressure portion. Generates an updraft c. In this way, the cold air from the north has the effect of air-cooling the building.

[Brief explanation of drawings]

Figure 1: Overall sectional view of the building of the present invention, Figure 2:
Fig. 1 is an enlarged cross-sectional view of the main part; Fig. 3: a cross-sectional view of another embodiment of the rooftop slab board; Fig. 4: central discharge port 10.
FIG. 5a is a cross-sectional view of the building of the present invention when the lid plate is attached to the horizontal plane. Fig. 5b: An explanatory diagram of the effect when the angle of the cover plate with respect to the horizontal plane is 45° or more. 1...Building, 2, 2a...Rooftop slab board, 3...Top floor slab, 4...Column, 5...Air circulation layer, 5a...
Tunnel-shaped air communication hole, 6...Air discharge port, 7...Air suction port, 8...Exhaust air rectification/lid plate, 9...Suction air rectification/lid plate, 10...Central discharge port, 11...Central discharge air rectification/lid Board, 12...Ceiling insulation material.

Claims (1)

[Claims] 1 Rooftop slab board 2 on the roof or roof of the building 1
The roof slab board 2 forms an air circulation layer 5 that communicates from the sunny side to the shaded side of the building 1, and a horizontal plane is formed in front of the air outlet 6 on the target side of the air circulation layer 5. The exhaust air rectifier/cover plate 8 is tilted upward at an angle of 15° to 45° to the air suction port 7 on the shaded side.
A suction air rectifier/cover plate 9 is attached to the rear surface, and the upward airflow a generated along the sunny side wall of the summer building 1 generates negative pressure at the air outlet 6, and the air inside the air circulation layer 5 is A rooftop slab air cooling construction method characterized in that low-temperature air on a shaded surface is discharged to an air outlet 6 through an air circulation layer 5 by sucking air into the rising air current a. 2 Rooftop slab board 2 on the roof or roof of building 1
The rooftop slab board 2 forms an air circulation layer 5 that communicates the sunny side and the shaded side, and the air outlet 6 on the target side of the air circulation layer 5 has an opening of 15 mm in front of the horizontal plane. Utilizing a rooftop slab air cooling construction method characterized by an exhaust air rectifier/cover plate 8 with an upward slope of ~45 degrees and a suction air rectifier/cover plate 9 attached to the back of the air suction port 7 on the shaded side. Building. 3 Rooftop slab board 2 on the roof or roof of building 1
The rooftop slab board 2 forms an air circulation layer 5 that communicates the sunny side and the shaded side, and the front side of the air outlet 6 on the sunny side of the air circulation layer 5 is set at an angle of 15° with respect to the horizontal plane. The exhaust air rectifier/cover plate 8 with an upward slope of ~45° is installed in the center of the rooftop slab plate 2 in the building 1, in which the suction air rectifier/cover plate 9 is attached to the rear surface of the air suction port 7 on the shaded side. A building using a rooftop slab air cooling construction method, characterized in that an air outlet 10 is provided, and a central exhaust air rectifier/cover plate 11 is provided adjacent to the upper end of the central air outlet 10. 4. A rooftop slab air cooling construction method according to claim 2, in which a rooftop slab board 2 is laid on the top surface of the top floor slab 3, and an air circulation layer 5 is formed between the rooftop slab board 2 and the top floor slab 3. Buildings used. 5. The rooftop according to claim 2, wherein a rooftop slab board 2a is laid on the upper surface of the top floor slab 3, and a tunnel-like air communication hole 5a is bored in the rooftop slab board 2a to form an air circulation layer. A building using the slab air cooling method. 6. A building employing the rooftop slab air cooling construction method according to claim 2, in which the air circulation layer 5 is sloped downward from the air outlet 6 to the air suction port 7. 7 Lower end of exhaust air rectifier/cover plate 8 and top floor slab 3
A building using the roof slab air cooling construction method according to claim 2, in which a gap is left between the roof slab and the roof slab. 8. A building using the roof slab air cooling construction method according to claim 2, in which the suction air rectifier/cover plate 9 attached to the rear surface of the air suction port 7 on the shaded side is tilted downward.