JPH0656224U - Building with external insulation - Google Patents

Abstract

(57) [Abstract] [Purpose] In a building with an external heat insulation structure, prevent condensation due to the cold bridge formed in the divided part of the heat insulating material, and make full use of the structure of the external heat insulation that is low cost and excellent in workability. . [Structure] In a building having an outer heat insulating structure in which a heat insulating material 5 is provided on the outer surface of an outer wall 1, a heat source body 7 is provided in a portion where the heat insulating material 5 is divided to shut off a cold bridge in the divided portion of the heat insulating material 5. I am trying.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a building having an outer heat insulating structure in which a heat insulating material is provided on the outer surface of an outer wall.

[0002]

[Prior art]

 For example, in an apartment house, since there are advantages such as low cost and excellent workability in achieving heat insulation of the outer wall, as shown in FIG. 4, a panel-shaped heat insulating material 5 is provided on the outer surface of the outer wall 1 as well. The exterior material 6 is attached to the outer surface of the structure for external heat insulation.

[0003]

[Problems to be solved by the device]

 However, in the above heat insulation technology, the heat insulating material 5 is divided at the extension portion of the cantilever slab 4 such as the common corridor or balcony with respect to the outer wall 1, so that the heat insulating performance is deteriorated, and the heat insulating material 5 is divided in the winter season. There was a problem that the part became a cold bridge extending from the cantilevered slab 4 to the outer wall 1 to cause dew condensation on the inner surface of the extension of the cantilevered slab of the outer wall 1.

Incidentally, the width of the outer wall 1 is 120 mm, the thickness of the cantilever slab 4 and the floor slab 2 is 150 mm, and the beam 3 is 400 mm wide and 600 mm high. For a building with an external heat insulation structure, in which a 20 mm thick phenolic foam heat insulating material 5 and a 13 mm thick glass fiber reinforced special lightweight aggregate as an exterior material 6 are provided on the outer surface of the heat insulating material 5, When the outside air temperature was kept at 0 degrees Celsius and the room temperature was kept at 20 degrees Celsius, the temperature distribution in the extension of the cantilevered slab of the outer wall 1 was simulated in a steady state by a personal computer. 4 from the extended portion to the beam 3 in sequence, the temperature distribution indicated by isotherms a to f every 2 degrees (8 to 10 degrees between isotherms a and b, 10 to 12 degrees between isotherms b and c, Isotherms c, d The result is that a cold bridge having a temperature of 12 to 14 degrees, a temperature of 14 to 16 degrees between the isotherms d and e, and a temperature of 16 to 18 degrees between the isotherms e and f is formed.

If the room temperature is 20 degrees, the concrete surface will condense at 14 degrees or less when the room humidity is 60%, and the concrete surface will be 16 degrees when the room humidity is 80%. It is known that dew condensation occurs at a temperature of less than 18 degrees, and when the indoor humidity is 90%, dew condensation occurs on the concrete surface at less than 18 degrees.

[0006] Alternatively, it is possible to prevent dew condensation by applying adiabatic reinforcement by internal heat insulation to the inner surface of the outer wall of the above-mentioned cold bridge, but this not only reduces the indoor area, but also reduces the number of man-hours. Since the number of the cantilevered slabs 4 increases and the workability deteriorates, it is currently avoided to use an external heat insulation structure in the building where the cantilever slab 4 is extended.

The present invention has been made in view of such a situation, and the rational improvement eliminates the influence of the cold bridge in the extension portion of the cantilever slab, which is low cost and excellent in workability. The purpose is to provide a building that takes advantage of the heat insulation structure.

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention is characterized in that, in a building having an outer heat insulating structure in which a heat insulating material is provided on an outer surface of an outer wall, a heat source is provided at a portion where the heat insulating material is divided.

[0009]

[Action]

 According to the above characteristic configuration, for example, the cold bridge formed in the divided part of the heat insulating material in the extension part of the cantilever slab is blocked by the heat energy of the heat source body, and the adverse effect of the cold bridge on the inner surface of the outer wall is significantly mitigated. To be done.

[0010]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. Figure 1 shows a part of a building with an external heat insulation structure. In the figure, 1 is an outer wall, 2 is a floor slab, 3 is a beam, 4 is a cantilever slab such as a corridor or a balcony, and is connected to the floor slab 2. It extends outside the outer wall 1. Reference numeral 5 denotes a phenol foam insulation material provided on the outer surface of the outer wall 1. An outer material 6 made of a glass fiber reinforced special lightweight aggregate molding plate is attached to the outer surface of the heat insulation material 5.

Reference numeral 7 denotes a heat source body for applying heat energy to a divided portion of the heat insulating material 5 with respect to the outer wall 1, that is, an extending portion of the cantilever slab 4 in which the heat insulating material 5 is in a defective state, for example, an insulating pipe. It is composed of a heater having a heating wire inserted therein and is provided at a corner portion above the extending portion of the cantilever slab 4 with respect to the outer wall 1. Reference numeral 8 is a temperature sensing sensor that senses the concrete temperature at the corner between the outer wall 1 and the floor slab 3. Based on the sensing result that the concrete temperature is, for example, 16 degrees Celsius or less in winter, the heat source 7 Is controlled to 20 degrees, for example.

According to such a configuration, the temperature decrease of the outer wall 1 in the divided portion of the heat insulating material 5 in winter is prevented, and the cold bridge formed in the divided portion of the heat insulating material 5 is cut off. Condensation on the inner surface is prevented.

Incidentally, under the same conditions as in the building having the outer heat insulating structure shown in FIG. 4, the temperature of the heat source body 7 is controlled to 20 degrees Celsius, and the temperature distribution in the cantilevered slab extension portion of the outer wall 1 is distributed. When a steady state simulation was carried out with a personal computer, the temperature distribution represented by the isotherms a to f every two degrees in sequence with the extension of the cantilever slab 4 in the center (between isotherms a and b 10 to 12 degrees, 12 to 14 degrees between isotherms b and c, 14 to 16 degrees between isotherms c and d, 16 to 18 degrees between isotherms d and e, and floor slab 2 deviated from isotherms e 18 to 20 degrees, further, the cantilever slab 4 deviated from the isotherm a shows 8 to 10 degrees between the isotherms a and h, and 6 to 8 degrees between the isotherms h and i). It was revealed that the cold bridge disappeared in the divided part of material 5.

In the above-described embodiment, the heat source body 7 is provided at the corner above the extension of the cantilever slab 4 with respect to the outer wall 1. However, as shown in FIG. 4 may be provided in a corner below the extension portion of the No. 4, or as shown in FIG. 3, the heat source body 7 may be embedded inside the outer wall 1 of the extension portion of the cantilevered slab 4. It is also possible to make changes such as providing the body 7 at the upper and lower corners of the extension of the cantilevered slab 4. A sensor 8 for controlling the heat generation temperature of the heat source body 7 is provided at a corner portion between the outer wall 1 and the floor slab 3. However, as with the heat source body 7 shown in FIG. It is also possible to implement the configuration by embedding it in the.

Although the function of the sensor 8 is not particularly limited, if the sensor 8 has a function of detecting, judging, and controlling room temperature, humidity, and wall surface temperature, the seven heating elements can be operated more reliably. be able to. Further, although the heat source body 7 is constituted by a heating wire, it can be implemented by replacing it with, for example, a pipe through which an antifreeze heat medium flows, and further, this pipe can be made into a spiral shape or a finned pipe. It is also possible to In particular, in the case of such a pipe configuration in which the heat medium flows, the advantage that the heat bridge formed in the divided portion of the heat insulating material 5 is effectively prevented in the summer by flowing the refrigerant body in the pipe. There is.

[0016]

[Effect of device]

 As described above, according to the present invention, the heat source body is provided at the portion where the heat insulating material is divided, and the cold bridge formed in the divided portion of the heat insulating material is blocked by the heat energy. It is possible to reliably prevent condensation on the inner surface of the outer wall without taking measures such as installing inner insulation, which alleviates the restrictions on the building that is the target of outer insulation, and reduces the cost and makes it easier to install. We were able to make full use of the heat insulation structure. In addition, since there is no need to perform internal insulation for reinforcement of insulation, one of the effects of external insulation is "to make the room area larger" even in a building with a cantilevered slab extension. Becomes

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a cantilevered slab extension portion in a building having an outer insulation structure.

FIG. 2 is a sectional view of a cantilevered slab extension portion according to another embodiment.

FIG. 3 is a cross-sectional view of a cantilevered slab extension portion of yet another embodiment.

FIG. 4 is a sectional view of a cantilevered slab extension portion of a conventional example.

[Explanation of symbols]

 1 ... Outer wall, 5 ... Insulating material, 7 ... Heat source body.

Claims (1)

[Scope of utility model registration request] 1. A building having an outer heat insulating structure in which a heat insulating material is provided on an outer surface of an outer wall, wherein a heat source is provided at a portion where the heat insulating material is divided.