JPS62138643A - Outdoor air-duct structure for air conditioning - Google Patents

Abstract

PURPOSE:To provide the structure of an air duct excellent in a weather proof and fire resisting properties by using as a concrete plate a concrete plate reinforced by carbon fibers. CONSTITUTION:When constructing an air duct structure 1, both terminal ends 6a and 6b of a CFRC formed plate 6 are faces with eaves 2 and the end surface of a wall body 4 by interposing a packing 11 therebetween, and a fitting bolt 10 secured to a bolt hole 9 provided beforehand is clamped. Then, a mortar 13 is filled into a bolt hole 12. Further, upon connecting CFRC formed plates 6 to each other, engaged cut-away portions thereof are overlapped upon each other, and an epoxy resin and the like are filled therebetween. By these procedures, the air duct structure 1 is formed into an airtight and heat insulating state, and it can be used as an air duct for air conditioning as it is.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to the improvement of air ducts installed on the exterior walls of buildings, particularly air conditioning air ducts, and more specifically relates to the improvement of air ducts installed on the exterior walls of buildings, and more particularly, Regarding air conditioning wind duct structure.

(Prior Art) Conventional air conditioning air ducts of this type have generally been installed inside buildings.

However, since such conventional air ducts are installed inside a building, first of all, a space is required for installing the air duct between the bottom of the beam and the ceiling. Second, other work such as ceiling work is involved during both building construction and wind duct renovation and repair, which makes work difficult and increases construction costs.Furthermore, in the event of a fire, This method has drawbacks and drawbacks, such as the fact that the wind duct becomes a flame duct and the insulation material generates toxic combustion gas, which increases the number of disasters.

For this reason, a proposal was made by the applicant to solve the above-mentioned drawbacks by installing a wind duct on the outer wall of a building, for example, in the 1980s.
Already done in 0-065282. That is, according to the above-mentioned idea, the indoor air conditioning air duct is made of a glass fiber reinforced concrete formed plate (hereinafter referred to as a GRC formed plate) with a cross-section shaped like a cross-section, which includes a heat insulating layer inside, and is sprayed with a heat insulating material in advance. It is formed by being attached to the lower surface and external wall surface of a protruding structure, and as a result, it is possible to use GRC molded plates made of the same material as the building frame to connect the required airflow to the outside of the building without damaging the architectural appearance of the building. It is designed so that it can be formed into

(Problems to be Solved by the Invention) As mentioned above, according to the above invention, it is possible to form the required air duct without damaging the architectural appearance of the building. However, the above invention still has the following problems. There were drawbacks such as:

In other words, the strength of GRC molded plates is reinforced or maintained by glass fibers mixed in mortar, but glass m fibers originally have poor alkali resistance strength, so glass fibers are Although the surface has been previously coated with an alkali-resistant material, the glass fibers are still susceptible to corrosion and breakage due to natural weathering due to the alkali components in the mortar. Note that such damage to the glass fibers is instantaneous, especially in the event of a fire, since the alkali-resistant coating on the surface of the glass fibers is easily destroyed when the GRC board is heated.

As explained above, the wind duct according to the above-mentioned invention has poor weather resistance and fire resistance due to natural weathering, and as a result, the GRC boards installed on the outer wall may develop cracks due to natural weathering. This has the major drawback that the broken pieces are often peeled off and dropped, and furthermore, in the event of a fire, the disaster is increased to a large extent.

(Means for Solving the Problems) Therefore, an object of the present invention is to provide a wind duct structure with excellent weather resistance and fire resistance. The road structure includes a lower surface 3 of a protruding structure 2 of a concrete structure building, an outer wall surface 5 of a wall 4 that supports the structure that is continuous with the lower surface 3 of the structure, and a lower surface 3 of the structure and the outer wall section. 5
The structure of an outdoor air conditioning wind duct 1 consists of a space having a rectangular cross-section and a concrete plate 6 having a cross-sectional shape having both end edges 6a and 6b attached, respectively, and the concrete plate 6 having carbon lI&m reinforcement. Concrete board (hereafter C
(referred to as FRC molded plate),
As a result, the CFRC constituting the outdoor air conditioning wind duct structure 1
Molded plates have excellent moldability and workability to form the air duct structure into any desired shape with a good appearance, and their excellent weather resistance and fire resistance prevent them from peeling or falling off in the event of a fire. This is something that can definitely be prevented.

(Example) Hereinafter, one example of the present invention will be described based on the accompanying drawings.

In FIGS. 1, 2, and 3, the outdoor air conditioning air duct structure l is divided by the lower surface 3 of the eaves 2, the outer wall surface 5 of the wall 4, and the CFRC molded plate 6 having a cross-sectional shape. , is formed. Here, a heat insulating material 8 is sprayed on the bottom surface 3 and the outer wall surface 5, and a heat insulating material layer 7 is included inside the CFRC molded plate 6. Note that 14 is a floor slab, 15 is an air conditioning hole, 16 is a ceiling, and 17 is a beam. When constructing the wind duct structure 1, both edges 6a and 6b of the CFRC molded plate 6
and the end faces of the eaves 2 and the wall 4 are brought into contact with each other with the backing 11 interposed between them, and the mounting bolts 10 fixed to the bolt holes 9 that have been driven in advance are fastened.
2 is filled with mortar 13. In addition, CFRC molded plate 6
When connecting comrades, the engagement notch 6C16d,...
・Place them one on top of the other, and fill the space between them with Epoquin resin 18 or the like. As a result, the air duct structure 1 is formed in an airtight and heat-insulating state, and can be used as it is as an air-conditioning air duct.

Next, such a CFRC molded plate is molded by mixing carbon M&F with a length of about 3 to 10 mm into mortar made of cement and sand. Carbon fibers are mechanically mixed in mortar mixed with carbon fibers, and the mixture is extruded or cast into a mold (hereinafter referred to as the missing molding method), or carbon fibers are premixed in mortar powder and then water is added. The mixture may be extruded or cast into a mold (hereinafter referred to as premix molding method), or the mortar-carbon fiber mixture mixed with the gun may be directly sprayed or molded using a known spraying gun. This is a pour casting method (hereinafter referred to as gun spraying method). In the premix molding method, the mixed carbon fibers are expanded in the length direction in the mortar, which is superior to the missing molding method. The added strength is demonstrated.

Furthermore, depending on the method of direct gun spraying, mortar spraying can be used to process carbon fiber textile fabrics.

In this case, the laminated reinforcing fabrics are alternately oriented in the warp and weft directions to prevent the molded product from bending or warping. Note that when a heat insulating material layer is included, the heat insulating material is placed in the casting mold in advance. Next, the CFRC board formed in this way is cured and dried in a short time by a so-called autoclave curing treatment using steam heating, etc., and then subjected to a post-impregnation treatment with styrene monomer etc. to further improve its water resistance, weather resistance, and durability. be done.

However, such CFRC molded plates are reinforced with carbon fibers that have excellent alkali resistance and fire resistance, and have excellent weather and fire resistance, and are resistant to cracks due to natural weathering or in the event of a fire. It does not cause peeling or falling off, has excellent moldability and strength, and can be formed into a thin and precise shape with one dimension. That is, for example, in the T-shaped joint 19 and the elbow-shaped joint 20 for air passages illustrated in FIGS. 4 and 5, the plate thickness of the mounting ribs 19a and 20a to the wall surface is formed to be sufficiently thin. , if necessary, the collar L9a, 20a
The top surface can be covered with the finishing allowance for the wall surface.

In addition, since such CFRC molded plates are made of the same material as the concrete for the building structure, they have the same properties such as expansion coefficients,
In addition, it is designed to be small in terms of design, and it is also possible to perform on-site processing such as cutting and drilling. moreover,
By standardized production in a factory, it is relatively inexpensive and lightweight, and furthermore, it can be suitably used as a general outdoor exterior material.

(Effects of the Invention) As explained above, the outdoor air conditioning wind duct structure of the present invention has the following features:
An L-shaped CF is installed on the lower surface of the protruding structure of the building and on the outer wall surface continuous to the lower surface of the structure, so that a space is partitioned inside.
By attaching the RC molded plate, it is possible to construct an outdoor air conditioning air passage structure with excellent weather resistance and heat resistance using the CFRC molded plate, so it is possible to construct an air conditioning air passage structure outdoors that was previously required. This has the effect of reducing the building floor height by eliminating the need for space under the beams, and the excellent weather resistance and heat resistance of the above-mentioned CFRC molded plates prevent cracks from forming in outdoor airways due to natural weathering or especially in the event of a fire. This has the effect of completely preventing fragments of the wind channel from peeling off to the ground and falling, which often occur in conventional outdoor wind channels of this type.

Furthermore, the CFRC molded plates constituting the outdoor airway have excellent weather resistance and heat resistance as described above, and at the same time,
On the other hand, it also has excellent strength and formability, can be formed into thin walls with accurate dimensions and shapes, and can be processed by cutting on site.Furthermore, it can be produced in large quantities at a factory to a standard. Therefore, there is an advantage that outdoor wind channels can be constructed relatively inexpensively, lightweight, and with good on-site construction. Note that such a CFRC molded plate can be widely used as a general outdoor exterior material.

[Brief explanation of drawings]

Fig. 1 is a sectional view of an embodiment of the present invention, Fig. 2 is a detailed view of part A in Fig. 1, Fig. 3 is a front perspective view of Fig. 1, and Figs. 4 and 5 are CFRC joints. FIG. ■... Wind duct structure for outdoor air conditioning, 2... Eaves, 3... Walls, 6... CFRC molded plates, 7... Heat insulation layer, 8...
- Sprayed insulation material. Figure 1 Figure 2 Figure 3 @ 4th (!1 Procedure Neho Pressure Snow (Method) % Formula % Display of Case 1985 Patent Application No. 278404 Name of Invention 'Relationship with Case B Representative of Patented Patent Applicant People 〒lot ft03 (86ft) 323
Subject of amendments 2 to 5 Contents of amendment to the specification The specification shall be corrected as per the attached amended specification.

Claims (1)

[Claims] A cross section L in which the lower surface of a protruding structure of a concrete structure building, the outer wall surface of a wall supporting the structure that is continuous with the lower surface of the structure, and both ends of which are attached to the lower surface of the structure and the outer wall surface, respectively. 1. An outdoor air conditioning wind duct structure comprising a space with a rectangular cross section divided by a letter-shaped concrete plate, the concrete plate being a carbon fiber reinforced concrete plate.