CZ303235B6 - Air-conditioning duct - Google Patents

Abstract

The present invention relates to an air-conditioning duct for transporting or distribution of air made of either woven or non-woven cloth or a foil, characterized in that it comprises duct walls (2) forming a square or triangle in cross section, longitudinal upper bearing sections (1) intended for fastening upper corners (4) of the duct therein, and at least one longitudinal lower distance section (3) for defining position of the air-conditioning duct (5) lower corner.

Description

Ventilation ducts

Technical field

The invention relates to an air duct for conveying, distributing and exhausting air produced from woven or nonwoven fabric or foil.

BACKGROUND OF THE INVENTION

Air ducts hitherto known for conveying or distributing air from a woven or nonwoven fabric or foil, also called textile diffusers, consist of a material sewn into a closed shape of various cross-sections. This is usually circular, but generally it is always a part of the circle or a combination of several such parts. The pipe is perforated in some way and inflated during operation by air flow, whereby air is distributed by perforation or passage through the material. In some cases, these pipes contain reinforcements to maintain the desired shape even without inflation by air flow, such as circular hoops sewn into the diffusers, the disadvantage of which is higher cost and complex assembly and disassembly. Another option is to use multiple suspensions that keep the top of the pipe in the correct position. This method is more expensive due to the larger amount of installation material. Another known solution is according to document CZ 17562, wherein a strut supporting a fabric is attached in the center of the cross-section of the pipeline, optionally below or above its center, and which is attached to the piping fabric at least in one place.

The disadvantage of the above mentioned air ducts or textile diffusers is their ability to be used only for the air supply - distribution - and the impossibility to use them for the exhaust - exhaust - air. Extraction has to be solved by traditional piping made of solid materials, mostly sheet metal. However, the use of solid-material piping poses problems in many areas because such a rigid piping is difficult to clean, expensive and heavy. The textile ducts of the prior art cannot be used for air vacuum as it is deformed by the vacuum and completely loses its functionality. While it may be threaded onto a structure made of solid materials such as perforated sheet metal, it will lose the essential advantages of textile piping, which is cleanability, lightness and cheapness. Another disadvantage of textile diffusers is seen in the fact that it is not possible to use a square cross-section which allows a higher air flow at the same height,

SUMMARY OF THE INVENTION

These deficiencies are largely eliminated by air ducts for the conveyance or distribution of air, from woven or nonwoven fabric or from a foil, the nature of which is to include:

duct walls which form a cross-section of a quadrangle or triangle, longitudinal upper bearing profiles in which the upper corners of the duct are fixed, and

- at least one longitudinal lower spacer profile for defining the position of the lower corner of the screed 431.

Preferably, the upper and / or lower corners of the conduit are adapted for external attachment in the longitudinal upper and / or lower profiles by reinforcement.

According to another preferred embodiment, the lower longitudinal spacer profile is located inside the lower corner of the pipe.

- 1 GB 303235 B6

In another preferred embodiment, the longitudinal lower spacer profile in which the lower corner of the conduit is fixed is connected to the longitudinal upper support profile by vertical fixed spacer joints extending along the vertical wall.

Preferably, the longitudinal upper support profiles are interconnected by crossbars to define their relative position.

The ventilation duct is designed to prevent its deformation due to underpressure or overpressure. The pipeline still maintains its square - or triangular - cross-section. The upper part of the textile piping is adapted to be attached to a fixed structure, which is either suspended in space or attached directly to the ceiling. The lower part of the textile duct is then adapted to attach or insert a load-bearing structure which, by its weight, keeps the duct walls taut at the practically used vacuum levels. The present piping solution achieved a very simple and practically applicable method of maintaining the shape of the pipeline. Air flow enters the duct in the usual way through holes or fabric. The main advantage of the invention is the possibility of expanding the use of air ducts and woven or nonwoven or foil diffusers for most low-pressure air extraction systems or for the manufacture of rectangular supply textile ducts, which has hitherto only been possible with rigid pipe solutions.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention is explained in more detail by means of the drawings. Giant. 1 is a cross-sectional view of the ductwork of rectangular cross-section, FIG. 2 shows a section through the duct in a non-operating condition, FIG. 2a in operation as a suction duct and FIG. 2b in operation as a supply duct.

Giant. Fig. 3 shows a textile suction diffuser with a triangular cross-section; Fig. 4 shows a section through the duct in a non-operating condition, Fig. 4a in operation as a suction duct and Fig. 4b in operation as a supply duct.

DETAILED DESCRIPTION OF THE INVENTION

The air duct for conveying or distributing air is made of a woven fabric of tubular shape, the walls 2 of which form a rectangular cross-section (Fig. 1). The two upper corners 4 of the walls are fixed in two longitudinal upper supporting profiles 1, which are interconnected by crossbars and form an upper supporting structure. On the opposite side, the lower corners 5 of the pipe walls 2 are mounted in the longitudinal lower spacer profiles 3, which are also connected by crossbars and form the lower spacer structure. At the points of the upper and lower crossbars, the lower longitudinal spacer profiles 3 are connected by fixed vertical spacer joints 6 with the longitudinal upper bearing profiles 1. The height of the vertical spacer joints 6 is adjusted according to the pipe size. The upper corners 4 and the lower corners 5 are provided with a reinforcement in the form of a sleeve which is inserted in the upper supporting profiles 1 and the lower spacer profiles 3. The sleeve can be further reinforced, e.g. The supporting structure of the upper supporting profiles can be suspended in space or fixed to the ceiling, as is usual with conventional pipes of this type.

In the case of an air duct whose walls 2 form a cross-section of a triangle (Fig. 3), the arrangement of the upper corners of the walls is similar to that of a rectangle. The remaining third - lower corner 5 is housed in one lower longitudinal spacer profile 3, which in this case constitutes a pipe load and is not firmly connected to the upper supporting profiles 1.

The new air duct solution also offers another possibility of attaching the lower corners 5 to the lower spacer profiles 3 so that the lower longitudinal spacer profile 3 is located directly inside the lower corner 5 of the duct.

-2GB 303235 B6

When the pipeline is out of service, its walls 2 are roughly flat according to the degree of cut-off in the profiles (Figs. 2, 4) and the vertical spacer connections 6. During operation, in case of exhaust, walls 2 are bent inwards (Figs. 2a, 4a). . The duct can also be used for air distribution, in which case the walls 2 are bent outwards (Figs. 2b, 4b).

INDUSTRIAL APPLICABILITY The air ducts of the present invention are industrially applicable to the installation of air duct equipment, particularly in plants requiring greater hygiene and cleanliness.

Claims (4)

PATENT CLAIMS An air duct for conveying or distributing air, of woven or nonwoven fabric 20 or of foil, comprising: - duct walls (2) forming a quadrangle or triangle in cross-section, longitudinal upper supporting profiles (1) in which the upper corners (4) of the duct are fixed, and at least one longitudinal lower spacer (3) to define the lower corner position (5) ) pipes. Ventilation duct according to claim 1, characterized in that the top and / or 30, the lower corners (4, 5) of the conduit are adapted for external attachment in the longitudinal upper and / or lower profiles (1, 3) by reinforcement. Air duct according to claim 1, characterized in that the lower longitudinal spacer (3) is arranged inside the lower corner (5) of the duct. Air duct according to claims 1 and 2, characterized in that the longitudinal lower limiting profile (3), in which the lower pipe corner (5) is fixed, is connected by vertical fixed limiting joints (6) to the longitudinal upper supporting profile (1). . Ventilation duct according to any one of the preceding claims, characterized in that the longitudinal upper supporting profiles (1) are interconnected by crossbars to define their relative position.