JPH0598719A - Adiabatic structure of attic - Google Patents

Abstract

PURPOSE:To lower the temperature in a ventilation space to enhance thermal insulating effect by accelerating the passage of air through the ventilation space of an attic. CONSTITUTION:Ventilation spaces 11A, 11B are formed between roof boards 4 and interior materials 3 of a building and thermal insulating materials 7 are provided between rafters 2 on the materials 3, while thermal insulating materials 8 are provided only on the undersides of the roof boards 4 on the side of a ridge. And the air temperature in the space 11A is made higher than that in the space 11B to cause convection of air.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating structure of an attic in which a ventilation space is formed between a roof base material of a building and an upper surface of a ceiling and a heat insulating material is arranged.

[0002]

2. Description of the Related Art Conventionally, the attic of a building, especially the attic, is
Since the heat of the roof surface directly flows in, a structure is adopted in which convection of air is caused under the back surface of the hut, and heat inflow is reduced by a heat insulating material or the like, which is illustrated in FIG. 7. In FIG. 7, 21 is a rafter of the building, 22 is a ceiling material fixed to the lower surface of each rafter 21, 23 is a base plate (roof base material) fixed to the upper surface of the rafter 21, 24 is a roof material, and 25 is ventilation. The ridges and 26 are heat insulating materials arranged between the rafters 21 on the upper surface of the ceiling material 22, and the heat insulating material 26 and the base plate 23.
A ventilation space 27 is formed between them, and the air flows through the ventilation space 27 from the eaves side toward the ventilation ridge 25. In addition, 28 is an outer wall material, 29 is a wall side heat insulating material, 30 is an interior wall material, 31 is an eaves side air inlet, and 32 is a ridge side exhaust port.

[0003]

By the way, in the above-mentioned conventional example, since the temperature in the ventilation space 27 is substantially the same from the eaves side to the ridge side, the air flow in the ventilation space 27 is slow,
The temperature drop due to convection cannot be expected, and if the heat insulation effect of the heat insulating material is to be increased, the thickness of the arrangement must be increased, but the effect of the heat insulating material cannot be expected because the height of the rafters 21 is limited. There is a problem.

The present invention has been made in view of the above situation, and an object of the present invention is to promote the flow of air in the ventilation space in the attic and to actively discharge heat to thereby generate air in the ventilation space. The purpose is to provide an attic thermal insulation structure that can lower the temperature and increase the thermal insulation effect.

[0005]

In order to achieve the above object, the present invention takes the following technical means. That is, the present invention, in the attic thermal insulation structure in which a ventilation space is formed in the attic of the building from the eaves side toward the ridge, and a heat insulating material is disposed in the ventilation space, the eaves side temperature in the ventilation space It is characterized in that the heat insulating material is arranged so that the temperature is higher than the building side temperature.

[0006]

According to the present invention, since the temperature in the ventilation space is higher on the eaves side than on the ridge side, the heated air in the ventilation space smoothly flows from the eaves side to the ridge side and is discharged, so that the temperature is low. Since the outside air flows in, the temperature in the ventilation space decreases, the heat flow into the room decreases, and the heat insulating effect increases.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment of the present invention, in which 1 is an attic of a building, 2 is a rafter, 3 is an interior material fixed to the lower surface of the rafter 2, and 4 is a roof substrate fixed to the upper surface of the rafter 2. The material is the base plate, 5 is the roof material that is roofed on the top surface of the base plate 4, 6 is the ventilation building, 7 is the heat insulation material that is placed on the upper surface of the interior material 3 between the rafters 2,
8 is a heat insulating material provided only on the back side of the base plate 4 near the ventilation building 6, 9 is a side wall insulating material, and 10 is an outer wall material.

A lower ventilation space 11A is formed between the heat insulating material 7 and the field board 4 and the rafter 2, and an upper ventilation space 11B is formed between the heat insulating material 7 and 8 and the rafter 2, and the two spaces 11A and 11B communicate with each other. At the same time, an air inlet 12 is provided on the lower lower surface of the lower ventilation space 11A, and an exhaust port 13 is provided at the upper end of the upper ventilation space 11B. Is in communication with.

In the first embodiment, both ventilation spaces 11A,
The temperature of the air in 11B is raised by solar radiation, but since the heat insulating material 8 is placed on the lower surface of the base plate 4 in the ventilation space 11B, the heat input by solar radiation is smaller than in the ventilation space 11A, and the ventilation The air temperature in the space 11A becomes higher than the temperature in the ventilation space 11B, and the air in the eaves-side ventilation space 11A flows smoothly toward the ridge-side ventilation space 11B.

Therefore, the outside air flows in through the air inlet 12, and the air in the ventilation spaces 11A, 11B is discharged into the atmosphere from the ventilation building 6 through the exhaust port 13, the temperature rise rate decreases, and the heat insulating material 7 After that, the amount of heat flowing into the attic 1 is greatly reduced, the heat insulation effect is enhanced, and a comfortable attic 1 can be obtained. FIG. 2 shows an essential part of the second embodiment of the present invention. The difference from the first embodiment is that the heat insulating material on the ceiling interior material 3 is omitted, and the other parts are the same as the first embodiment. The air temperature inside the lower ventilation space 11A is higher than the air temperature inside the upper ventilation space 11B, which promotes the flow of air to lower the temperature inside both spaces 11A and 11B and reduces the heat flow into the attic 1. Can be reduced.

FIG. 3 shows the essential parts of a third embodiment of the present invention.
The difference from the first embodiment is that a heat insulating material 8A having a thickness smaller than that of the heat insulating material 8 on the upper ventilation space 11B is provided on the lower ventilation space 11A on the lower surface of the base plate 4 as well. Similar to the first embodiment, it is possible to generate a temperature difference between the ventilation spaces 11A and 11B, and the same effect can be expected. FIG. 4 shows an essential part of the fourth embodiment of the present invention. The difference from the third embodiment is that
The heat insulating material 8B arranged on the lower ventilation space 11A is the upper ventilation space.
An effect equivalent to that of the third embodiment can be expected in that a material having the same thickness as the heat insulating material 8 of 11B and a low heat insulating effect is used.

FIG. 5 shows the essential parts of a fifth embodiment of the present invention.
The difference from the third embodiment is that the thickness of the heat insulating material 8 arranged on the lower surface of the base plate 4 is gradually increased from the eaves side toward the ridge side, which is equivalent to the third embodiment. You can expect an effect. FIG. 6 shows a main part of a sixth embodiment of the present invention, which differs from the other embodiments in that the ventilation pipe 14 is fitted in the ventilation spaces 11A and 11B, and the air resistance is reduced by the ventilation pipe 14. It is possible to ensure the circulation of air, and by fitting the ventilation spaces 11A and 11B in the first to fifth embodiments, it is possible to further improve the heat insulating effect.

The present invention is not limited to the above-described embodiment. For example, a plurality of partition members may be arranged between the rafters in parallel with the rafters to form a plurality of ventilation paths between the rafters. it can. In addition, in the base ventilation method for the outer wall other than the attic, the temperature of the lower portion of the ventilation space is configured to be higher than that of the upper portion, so that ventilation inside the wall can be promoted.

[0014]

As described above, the present invention provides an attic heat insulating structure in which a ventilation space is formed in the attic of a building from the eaves side toward the ridge, and a heat insulating material is disposed in the ventilation space. Since the heat insulating material is arranged so that the eaves side temperature becomes higher than the ridge side temperature, the air in the ventilation space in the attic is smoothly distributed and the heat is positively activated. It can be discharged to lower the temperature in the ventilation space,
The amount of heat flowing into the room can be reduced, the heat insulation effect can be greatly improved, and the room can be made comfortable.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a first embodiment of the present invention.

FIG. 2 is a vertical sectional view showing a main part of a second embodiment of the present invention.

FIG. 3 is a vertical cross-sectional view showing the main parts of the third embodiment.

FIG. 4 is a vertical cross-sectional view showing the main parts of the fourth embodiment.

FIG. 5 is a vertical cross-sectional view showing the main parts of the fifth embodiment.

FIG. 6 is a partially cutaway perspective view showing a main part of the sixth embodiment.

FIG. 7 is a vertical sectional view showing a conventional example.

[Explanation of symbols]

 7 Thermal insulation 8 Thermal insulation 11A Ventilation space 11B Ventilation space

Claims (1)

[Claims] 1. In an attic thermal insulation structure in which a ventilation space is formed in the attic of a building from the eaves side toward the ridge, and a heat insulating material is disposed in the ventilation space, the eaves side temperature in the ventilation space is An insulating structure for the attic, in which the heat insulating material is arranged so that the temperature will be higher than the building temperature.