JP2013160036A - Folded-plate roof heat-shielding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve energy saving of a folded-plate roof of a steel-framed building.SOLUTION: In the folded-plate roof heat-shielding method, between an existing folded-plate roof and a new folded-plate roof, a heat-shielding folded-plate is provided that has the substantially same shape as the new folded-plate roof and has high reflectivity against radiant heat, such as aluminum foil, in order to form a triple structure. And, nonventilation material is provided in the upstream and the downstream of the roof.

Description

  The present invention relates to a heat shield method for a folded-plate roof of a new or existing building.

  Conventionally, steel roofs such as factories have often used folded plate roofs. However, there is no heat insulating material corresponding to these, and there are almost no energy saving measures for the folding roof of a new building. In recent years, double roof construction methods have been installed in existing buildings for the purpose of energy saving. There are almost insulation methods.

Patent application 2005-25180 Japanese Patent Application No. 8-145137 Patent application 2006-275852

Problems to be solved by the invention

Therefore, there were the following problems.
In the first place, the double roof system in which a new folded plate roof is stacked on an existing folded plate roof is intended to save energy by reducing the heat input and output of the building rather than extending the durability of the roof.

  As a method for energy saving of the double roof, a ventilation method is generally used in which air is allowed to flow between the double roof materials. This method is a method of transferring the heat of the roofing material to the air, using so-called convection heat to exhaust heat, but this convection heat does not absorb or supply heat only from one side of the double roof, It will be done simultaneously from both new and existing folded roofing materials.

  For example, in summer, part of the heat supplied to the new folded-plate roof is absorbed by the air passing between the double roofs and carried outdoors, but at the same time, the heat absorbed by the existing folded-plate roof is also discharged from the room become. In winter, cold air is brought into the room through the existing folded roof. Therefore, although the ventilation method has a certain effect on heat countermeasures, it has a negative effect in winter, and there is a problem that it is not very efficient considering the energy saving effect throughout the year.

In addition, there is a construction method in which a double roof is constructed by attaching a new folding plate roof hanging bracket on the existing folded plate roof, and a thermal insulation material such as glass wool is installed between the double roofs for energy saving. . However, glass wool insulation has a certain effect on conduction heat, but has a problem that it cannot cope with radiant heat and a great energy saving effect cannot be expected.
Furthermore, attaching a new folded-plate roof on the existing folded-plate roof raises the height of the roof, and therefore there is a problem that it cannot be adopted in places where height restrictions are severe.

In a new building, a thin sheet of anti-condensation is stuck on the indoor side of the folded-plate roof, and it falls to some extent when the shape of the folded-plate roof is complicated or when heat insulating material is attached to the lower side of the folded-plate roof. The current situation is that no energy conservation measures have been taken.
The present invention has been made to solve these problems.

Means for solving the problem

Aluminum foil folded almost in the same shape as the folded roof material, and a heat shielding folded plate with high reflectivity against radiant heat is attached between the new folded plate roof and the existing folded plate roof to form a triple structure, and the upstream end of the roof Folded plate roof heat shield construction method with air vents at the front and downstream ends.
A heat-shielding folded plate with high reflectivity against radiant heat, such as aluminum foil folded in almost the same shape as the folded-plate roofing material, is attached to the lower side of the new folded-plate roof to form a double structure, and the upstream end of the roof and Folded plate roof heat insulation method with a vent stop at the downstream end.

Heat shield folded plate perspective view Folded plate roof thermal insulation method cross section Heat shield plate acceptor perspective view Cross section of zigzag heat shield Cross section of new building heat shield

The best mode for carrying out the present invention will be described below.
According to reports from many US institutions, an average of 75% of the heat passing through buildings is radiant heat. Moreover, it is said that 70 to 93% of heat coming in and out from the roof is radiant heat. Therefore, it can be said that cutting this radiant heat is the most efficient energy saving method.

  In general, large buildings such as factories and large stores have very large folded roofs. In order to insulate or heat-insulate these buildings, it is common to hang a scaffold in the room and attach a metal object such as a light ceiling near the ceiling, and attach a heat-insulating material or heat insulating material to it. However, the current situation is that it is not progressing due to problems such as high costs for scaffolding work, light roofing work, etc., and the fact that daily production work cannot be done by indoor work. Therefore, the double roof method of attaching a new folded plate roof on the existing folded plate roof has been increasing, but these are for the heat insulation method that puts the air between the double roof and the heat insulation method. It is not possible to expect a sufficient energy saving effect.

  In the present invention, between the existing folded-plate roof 8 and the new folded-plate roof 5, the heat-insulating folded plate 3 having a high reflectivity with respect to radiant heat such as aluminum foil having almost the same shape as the folded-plate roof is provided. It has a triple structure. Furthermore, the upstream end portion and the downstream end portion of the roof are provided with a ventilation stopper for stopping the air flow by an iron plate or the like.

  Here, the shape of the roof and the heat-insulating folded plate 3 are the same, that the gap between the new folded plate roof 5 and the heat-insulating folded plate 3 or the existing folded plate roof 8 and the heat-insulating folded plate 3 is constant. Thus, a factor for forming a uniform still air layer 6 that is important for heat transfer prevention can be formed. Thereby, not only can the radiant heat be efficiently reflected on both sides of the heat-insulating folded plate 3, but also a large thermal resistance can be obtained by the effect of the static air layer 6, and the heat transfer can be greatly reduced.

  First, in summer when the outside air temperature is high, a part of the radiant heat applied to the new folded-plate roof 5 is reflected, but most is absorbed by the new folded-plate roof 5 and becomes heat. This heat is irradiated as secondary radiant heat to the heat shield plate 3 through the space of the still air layer 6, but the heat shield plate 3 is a material having a high reflectivity with respect to the radiant heat, and most of it is a new folded plate roof. It is reflected back to 5, is absorbed by the new folded-plate roof 5 again, becomes heat, and is radiated to the atmosphere. The heat absorbed by the heat-insulating folded plate 3 is radiated as the third radiant heat toward the existing folded plate roof 8, but the amount thereof is several percent, and it is possible to reliably prevent the heat from entering.

  Conversely, when the indoor temperature is higher as in winter, the indoor heat is directed from the room to the outdoors. At this time, most of the heat toward the roof is absorbed by the existing folded-plate roof 8, and most of it is radiated to the heat-insulating folded plate 3 through the space of the static air layer 6 as radiant heat. However, since this heat-insulating folded plate 3 is a highly reflective material for radiant heat, most of it is reflected back to the existing folded-plate roof 8. This heat is then radiated indoors to heat indoor building materials and furniture. In this way, by constructing the heat-insulating folded plate 3 between the new folded plate roof 5 and the existing folded plate roof 8, heat transfer between the outdoors and the indoors can be greatly reduced throughout the year. It will be very big.

  The heat-insulating folded plate 3 used in the present invention is almost the same shape as the folded plate roof, and uses a folded plate roof material folding machine made of a thin and rigid aluminum foil or other highly reflective material for radiant heat. Can be easily processed. Of course, the folded shape of the heat shield folded plate connecting portion 2 at both ends of the heat shield folded plate 3 can be made the same as that of the roofing material. For this reason, the fitting with the adjacent heat shield folding plate 3 is good, and it is possible to reduce the heat entering and leaving the upper or lower space from the gap of the heat shield folding plate joining portion 2.

  In order to set the position of the heat shield folding plate 3 in the roof flow direction, the front and rear positioning openings of the heat shield folded plate in which the new folded plate roof suspension 4 is inserted in accordance with the interval of the new folded plate roof suspension 4 1 is provided.

  The material of the heat shield plate 3 is a material having high reflectivity with respect to radiant heat, so there are many metal-based materials, so there is rigidity, but if the strength is insufficient, the overall shape is as shown in FIG. It can be used by bending the heat shield folded plate 3 itself into an S shape, a zigzag shape 7 or the like. Although it may be expensive to manufacture a new molding machine, since the longer heat-insulating folded plate 3 can be made, the work at the site is improved to each stage.

  The vertical position of the heat shield folded plate 3 is in the vicinity of the middle between the existing folded plate roof 8 and the new folded plate roof 5, and the distance between each folded plate roof material and the heat shield folded plate 3 is about 20 mm to 40 mm. preferable. This is because if the distance between the heat-insulating folded plate 3 and the folded roof material is too close, it is easily affected by conduction heat, and if it is too far away, it tends to cause convection heat. Distance.

  In order to easily set the height of the heat shield folded plate 3, there is a method of using the heat shield folded plate receiving material 7 as shown in FIG. This is a metal object that is bent continuously in the same shape as the heat-insulating folded plate 3, and an air space rib 10 is attached to a portion that contacts the top end of the existing folded plate roof 8. By determining the height of the rib, the interval between the still air layers 6 can be determined. In addition, a hole in which the new folded plate roof hanging material 4 is inserted in the top end of the heat shield folded plate receiving material 7 is formed, and the height can be set simply by dropping into the new folded plate roof hanging material 4. .

  In order to reflect radiant heat efficiently, the formation of the static air layer 6 is the best, so that the air shielding of the heat shield folded plate connecting portion 2 of the heat shield folded plate 3 is surely performed, the roof flow direction It is an absolute requirement to install a vent stop to stop the air at the upstream and downstream ends of the tube.

  The heat insulation construction method of the existing roof attaches the new folded-plate roof suspension 4 to the bolt of the existing folded-plate roof 8, and drops the heat-insulated folded-sheet receiver 7 into the new folded-plate roof suspension 4. Subsequently, the heat shield folded plate front and rear positioning opening 1 of the heat shield folded plate 3 is put on the new folded plate roof suspension 4 from above. At this time, it adjusts so that the heat shield folded-plate connection part 2 of the adjacent heat shield folded plate 3 fits perfectly. The connection of the upper and lower heat shielding folded plates 3 in the roof flow direction is fixed with screws or the like from the upper part at the position of the heat shielding folded plate receiving material 7. Further, the new folded plate roof 5 is fixed with a mounting bolt. Finally, air vents such as iron plates are installed upstream and downstream of the roof.

  For new buildings, the basic concept is the same as for existing buildings. However, since there is no existing folded plate roof 8 in the case of a new building, a double structure of the new folded plate roof 5 and the heat shield folded plate 3 is obtained. Of course, the heat shield folded plate 3 is bent in the same manner as in an existing building, but the heat shield folded plate front / rear positioning opening 1 is not necessary, and thus has a simpler shape.

  In the case of a new building, as shown in FIG. 5, the tight frame 12 for the new folded plate roof 5 is fixed on the C-shaped steel 13 and the tight frame 12 for the heat shield folded plate 3 is fixed on the beam 14 in parallel. The folded plate roof 5 is mounted on and fixed with bolts and the heat shield folded plate 3 with screws or the like. Of course, as with the existing roof heat insulation method, it is an absolute requirement to install air vents that stop air at the upstream and downstream ends in the roof flow direction.

Effect of the invention

  Although it depends on the height of the roof and the temperature generated in the room, it has been proven that an air conditioner is almost unnecessary in summer if it is a one-story building of 500 m2 or more. Furthermore, it has been confirmed that the heating and cooling costs throughout the year have been reduced by more than 50%.

  The cause of heat stroke is said to be due to an increase in body temperature, but the cause of the increase in body temperature is greatly affected by electromagnetic waves. Since the present invention can cut most of the electromagnetic waves from the roof, it can be expected to have a great effect on heat stroke.

  The heat-insulated folded plate is processed in advance at a factory or the like, so that the on-site work time is shortened and can greatly contribute to cost reduction.

  In the case of a new construction, the height of the roof can be constructed exactly the same as the conventional design. On the other hand, the existing building is slightly higher than other methods, but it is easy to perform construction in places where the height limit of the building is severe.

DESCRIPTION OF SYMBOLS 1 Heat shield folded plate front-and-back positioning opening 2 Heat shield folded plate connection part 3 Heat shield folded plate 4 Hanging material for new folded plate roof 5 New folded plate roof 6 Still air layer 7 Heat shield folded plate receiving material 8 Existing folded plate roof 9 Positioning hole 10 Air space rib 11 Zigzag shape 12 Tight frame 13 C-shaped steel 14 Beam

Claims (2)

  Aluminum foil folded almost in the same shape as the folded roof material, and a heat shielding folded plate with high reflectivity against radiant heat is attached between the new folded plate roof and the existing folded plate roof to form a triple structure, and the upstream end of the roof Folded plate roof heat shield construction method with air vents at the front and downstream ends.   A heat-shielding folded plate with high reflectivity against radiant heat, such as aluminum foil folded in almost the same shape as the folded-plate roofing material, is attached to the lower side of the new folded-plate roof to form a double structure, and the upstream end of the roof and Folded plate roof heat insulation method with a vent stop at the downstream end.

Images