JPS633143A - Leaking blast duct - Google Patents

Abstract

PURPOSE:To provide a leaking blast duct which is effective in conveyeing a blast to plants in a green house or cattles, etc. in a cattle shed by forming minutes gaps like in a texture among warp fibers and weft fibers which are provided by crossing and connecting many of warp fibers and many of weft fibers at least at a part which requires a leaking blast in a hollow cylindrical duct. CONSTITUTION:A leaking blast duct 1 uses the breathable film 2 of a bonded fabric which has many minute gaps and made of transparent split non-woven fibers. The raw material of the fibers is polyvinyl alcohol resin film. This film is rounded in cylindrical shape and its both side ends are sealed 3 by thermal fusion and one end of the opening in a cylindrical body is tied 4 and closed by a string, etc. In use the leaking blast duct 1 is supported in horizontal suspension among plants, for instance, by strings 5 and when a blast is sent into a duct 1 by a blower from its open end, breezes are sent to the plants from many minute gaps around the whole circumferential face of the duct 1.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a leakage duct that is particularly effective for blowing air to indoor plants, livestock in livestock barns, and the like.

(Prior Art) It is generally known that providing a breeze to the leaves of plants and livestock is effective for their growth. Conventionally, as a means of sending a breeze to plants in a greenhouse, a long hollow cylindrical duct made of synthetic resin film such as polyethylene with many small holes is installed near the plants, and one end of the duct is inserted into the duct. A so-called leakage duct is used, which blows cold air or a-air into the plant and releases the cool or warm breeze to the plants through the small holes.

However, in this conventional air leakage duct, the duct film itself lacks strength, and if a large number of small holes are provided in the duct, the strength becomes even lower, and the processing cost of forming a large number of small holes in the film is expensive. In addition, there were other problems, such as the fact that it was technically difficult to process micropores for releasing breeze into a synthetic resin film.

(Problem to be solved by the invention) The present invention aims to solve the conventional problems.

(Means for Solving the Problems) In order to solve the problems of the conventional method, the air leakage duct of the present invention has a hollow cylindrical duct in which at least a part of the hollow cylindrical duct that requires air leakage is connected to a large number of vertical lines and horizontal lines. It is made of a breathable sheet made by cross-linking filaments to form fine pores in the form of a texture between the vertical and horizontal filaments.

The above-mentioned breathable sheet is made by making a large number of thin cracks in parallel in a polyvinyl alcohol-based (e.g., vinylon), polyethylene-based, or other synthetic resin film, stretching it in the direction of the cracks to make split fibers, and making the split fibers into vertical fibers. , Split fiber non-woven fabric made by cross-layering horizontally and fusing each other to form fine voids between each vertically and horizontally split fibers, various synthetic resin tapes, strings, etc. Fused copper strip sheets, fabrics woven with various synthetic resin filaments, threads, tapes, strings, etc. vertically and horizontally, or fused fabrics fused at their vertical and horizontal intersections, natural fibers (e.g. Cloths woven with cotton yarn or blended yarn in warp or weft, and sheets with various other microscopic voids are selectively used depending on the purpose. The present invention will be described in detail below with reference to the drawings.

The air leakage duct (1) in Figure 1 consists of a breathable film (2) made of a transparent split fiber non-woven fabric with many fine voids made of a polyvinyl alcohol resin film (vinylon film).
) is rolled into a cylindrical shape and both ends are sealed together by heat fusion (3), and the opening and end of the cylindrical body is tied with a string or the like (4) to close it.

In use, the ventilation duct (1) is supported horizontally by strings (5) between plants in the greenhouse, and a blower is used to blow the air into the duct (1) from the open end of the duct (1).
) When air is blown into the duct (1), a breeze is released to the plants from the numerous microscopic voids on the entire circumference of the duct (1).

In another embodiment shown in FIG. 2, a duct (1a) is formed in the same way as the upper side by a breathable sheet (2a) made of a split fiber nonwoven fabric having many fine voids and made of a high-density polyethylene resin film, and the lower surface of the duct is Appropriate angle range (approximately 90 in the figure)
This is an example of an air-impermeable trough-shaped receiver that extends over the frame (6a).

Still another embodiment shown in FIG. 3 is an example in which both ends of the breathable sheet (2b) are joined (7b) to the both ends of the frame (6b) by welding, gluing, etc. to non-breathable gutter-like supports. It is.

(Effects of the Invention) The air leakage duct of the present invention has a strong breathable sheet formed by cross-linking vertical and horizontal striations, so the duct as a whole has extremely high strength compared to conventional products, and has a long-term lifespan. It can withstand use, and since many fine voids are formed by the arrangement of vertical and horizontal filaments, it is easier to form voids compared to conventional products, reducing processing costs. , it becomes possible to have considerably small voids, and its use value is extremely high.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a partially omitted perspective view, FIG. 2 is an enlarged cross-sectional view of another embodiment, and FIG. 3 is an enlarged cross-sectional view of still another embodiment. . 1.1a, 1b... Air leakage duct, 2.2a, 2b-...
Breathable sheet.

Claims (1)

[Claims] At least a part of the hollow cylindrical duct that requires air leakage is made by cross-linking a large number of vertical and horizontal wires to form microscopic voids in the form of a texture between the vertical and horizontal wires. A ventilation duct characterized by being formed from a flexible sheet.