Novel noise reduction air duct sheet and novel all-air noise reduction air duct

Abstract

The utility model relates to a novel noise reduction air duct sheet and a novel all-air noise reduction air duct, the sheet is formed by compounding an inner layer PET material, a middle layer high density polyester fiber board and an outer layer aluminum foil, the sheet is rectangular, the sheet is provided with at least two V-shaped shallow grooves which are parallel to one side of the sheet, the V-shaped shallow grooves cut the inner layer PET material, the middle layer high density polyester fiber board and the outer layer aluminum foil are arranged in parallel, and the middle layer high density polyester fiber board and the outer layer aluminum foil are arranged in parallel. Cutting or partially cutting the middle-layer high-density polyester fiber board, and not cutting off the outer-layer aluminum foil, so that the sheet is divided into at least three side wall areas from the inner side surface; corresponding diagonal planes or corresponding step edges are arranged on the edges of two parallel sheets of the V-shaped shallow groove respectively. The novel all-air noise reduction air duct is formed by the novel noise reduction air duct sheet, the cross section of the novel all-air noise reduction air duct is polygonal, the cross section of the novel all-air noise reduction air duct is generally square, the novel all-air noise reduction air duct adopts an integrated pipe combining mode, the size and the bent pipe of the novel all-air noise reduction air duct are more convenient to customize, and due to the use of the composite material, the sealing performance can be better guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of all-air products, and particularly relates to a novel sound-absorbing air duct sheet and a novel all-air sound-absorbing air duct. BACKGROUND

[0002] At present, the air ducts in the all-air product category are mainly metal pipes, glass fiber pipes and EPP pipes; however, these materials have certain disadvantages, for example:

[0003] 1. The EPP material is a closed-cell material and needs to be prepared into an air duct by using a mold, and the process is complex and the cost is high;

[0004] 2. The glass fiber has very high on-site construction control requirements, and if even a tiny damage to the air duct occurs during construction, the glass fiber material will be blown out by the wind, and the glass fiber cotton will cause great health damage to the human body;

[0005] 3. The metal pipe has good sound insulation effect, but is not conducive to on-site processing and has high cost;

[0006] In addition, most of the air ducts are complex to manufacture, and in particular, to ensure the sealing of the air duct, the assembly of the air duct needs to be convenient, and the process needs to have high requirements and good precision. SUMMARY

[0007] The present application aims to solve the existing problems and provide a novel sound-absorbing air duct sheet and a novel all-air sound-absorbing air duct which are convenient to install and have excellent heat preservation, sound insulation and security performance.

[0008] To achieve the object of the present application, the present application discloses a novel sound-absorbing air duct sheet, which is composed of an inner layer PET material, a middle layer high-density polyester fiber plate and an outer layer aluminum foil, and is rectangular, and at least two “V”-shaped shallow grooves parallel to one edge of the sheet are arranged on the sheet, the “V”-shaped shallow grooves cut the inner layer PET material, cut or partially cut the middle layer high-density polyester fiber plate, and do not cut the outer layer aluminum foil, so as to divide the sheet into at least three side wall areas from the inner side.

[0009] Further, the opening angle of the “V”-shaped shallow groove is 60-120 degrees.

[0010] Further, three “V”-shaped shallow grooves are arranged on the sheet, so as to divide the sheet into four side wall areas from the inner side, which are a first side wall area, a second side wall area, a third side wall area and a fourth side wall area in sequence, the first side wall area and the third side wall area have the same width, and the second side wall area and the fourth side wall area have the same width.

[0011] Further, the opening angle of the "V" shape shallow groove is 90 degrees.

[0012] Further, the inner layer PET material and the middle layer high-density polyester fiber plate extend further than the outer layer aluminum foil by a length L in the direction parallel to one end and / or both ends of the "V" shape shallow groove.

[0013] Further, the length L of the further extension of the middle layer high-density polyester fiber plate forms a step along the outer surface, and the thickness s of the step is one fifth to two thirds of the thickness H of the sheet.

[0014] A new type of full-air sound attenuation duct, the new type of sound attenuation duct sheet is folded inward, each "V" shape shallow groove is clamped and closely attached, and the corresponding chamfered surface or corresponding step along of the two sheet edges parallel to the "V" shape shallow groove are adhered and fixed to each other, thereby forming a new type of full-air sound attenuation duct that penetrates front and back, and the cross section of the new type of full-air sound attenuation duct is polygonal.

[0015] Further, the cross section of the new type of full-air sound attenuation duct is square.

[0016] Further, the new type of full-air sound attenuation duct has an installation end at the front end and / or rear end, which is formed by the further extension of the middle layer high-density polyester fiber by a length.

[0017] Further, the outer dimension of the installation end is smaller than the outer dimension of the ventilation duct body.

[0018] The composite material used in the patent is more in line with the demand for noise reduction, heat preservation, and environmental protection of full-air products; among them, the PET film material mainly isolates air and humidity; the high-density polyester fiber plate is a porous material, mainly for heat preservation and noise reduction, especially for medium and high frequency noise; the role of aluminum foil is to be beautiful, while isolating external air from entering the duct; in actual production, the adhesion between the composite materials uses environmentally friendly formaldehyde-free water-based glue, which can prevent glue from penetrating into the fiber plate, so as to avoid affecting the noise reduction effect.

[0019] The patent adopts an integrated pipe joining method, that is, the entire sheet is folded inward to form a duct, the sheet is laid flat, the "V" shape shallow groove is cut, the glue is brushed after folding, the pipe is joined, and the pressure is adhered to form the duct. Such forming method, its size and bending pipe are more convenient for customization, since the sheet is formed in one piece (integrated), the sealing performance can be better guaranteed.

[0020] Therefore, the obtained sound attenuation duct is more quiet, and is more conducive to customized processing according to the site conditions, and is more flexible. BRIEF DESCRIPTION OF DRAWINGS

[0021] The specific description given as non-limiting example better explains what the present application comprises and how it can be implemented, in addition to which reference is made to the attached drawings, in which:

[0022] Figure 1 is a schematic view of a sheet material in the present patent embodiment;

[0023] Figure 2 is a schematic view of a cross-section of a sheet material in the present patent embodiment;

[0024] Figure 3 is a partial enlarged view of Figure 2 ;

[0025] Figure 4 is a perspective view of a new full-air sound-attenuating duct in the present patent embodiment;

[0026] Figure 5 is a front view of an end face of a new full-air sound-attenuating duct in the present patent embodiment;

[0027] Figure 6 is a side view of a new full-air sound-attenuating duct in the present patent embodiment. DETAILED DESCRIPTION

[0028] The present application is described in detail below with reference to the attached drawings and specific embodiments.

[0029] As shown in Figures 1-6 , a new sound-attenuating duct sheet material 1, referred to simply as sheet material 1, is composed of an inner layer of PET material 11, a middle layer of high-density polyester fiberboard 12, and an outer layer of aluminum foil 13, as shown in Figure 3 , the sheet material 1 is rectangular, as shown in Figure 1 , the sheet material 1 is provided with at least two "V"-shaped shallow grooves 2 arranged parallel to the edges 14 of the sheet material 1, in this embodiment, three "V"-shaped shallow grooves 2 are provided on the sheet material 1 to divide the sheet material 1 into four side wall regions from the inside, in order: first side wall region 211, second side wall region 212, third side wall region 213, and fourth side wall region 214, the first side wall region 211 and the third side wall region 213 are the same width, and the second side wall region 212 and the fourth side wall region 214 are the same width;

[0030] As shown in Figure 2 , the "V"-shaped shallow grooves 2 cut through the inner layer of PET material 11, cut through or partially cut through the middle layer of high-density polyester fiberboard 12, and do not cut through the outer layer of aluminum foil 13, in this embodiment, the "V"-shaped shallow grooves 2 cut through both the inner layer of PET material 11 and the middle layer of high-density polyester fiberboard 12, with the outer layer of aluminum foil 13 serving as a connecting layer;

[0031] In this embodiment, the two edges 14 of the two parallel sheets 1 of the "V"-shaped shallow groove 2 are respectively provided with corresponding step edges, which are referred to as the first step edge 141 and the second step edge 142 in this embodiment; in this embodiment, the opening angle of the "V"-shaped shallow groove 2 is 90 degrees.

[0032] As shown in Figure 6 , the inner layer PET material 11 and the middle layer high-density polyester fiber plate 12 extend further than the outer layer aluminum foil 13 by a length L in the direction parallel to one end and / or both ends of the "V"-shaped shallow groove 2, as shown in Figure 6 ; in this embodiment, the length L of the further extension forms a third step edge 3 on the outer side of the middle layer high-density polyester fiber plate 12, and the thickness s of the step is one-fifth to two-thirds of the thickness H of the entire sheet 1.

[0033] A new type of full-air sound attenuation duct 4 is formed by folding the new type of sound attenuation duct sheet 1 inward, clamping and tightly adhering each "V"-shaped shallow groove 2, and adhering and fixing the first step edge 141 and the second step edge 142 of the two parallel edges 14 of the "V"-shaped shallow groove 2, as shown in Figure 3 , thereby forming a new type of full-air sound attenuation duct 4 that is through from front to back; in this embodiment, the cross section 41 of the new type of full-air sound attenuation duct 4 is square (rectangular), as shown in , which is an end view of the new type of full-air sound attenuation duct 4, and the ratio of the thickness s of the step to the thickness H of the entire sheet 1 can be clearly seen.

[0034] Further, the new type of full-air sound attenuation duct 4 has an installation end 42 formed by the further extension of the middle layer high-density polyester fiber plate by a length, and the outer size of the installation end 42 is smaller than the outer size of the body of the duct, which is reserved for assembly during construction.

[0035] The advantage of the square duct design of the present patent is that, under the same air supply, the number of square ducts required is less than that of circular ducts of the same diameter, which is more conducive to decoration design; and the square design is more conducive to the stacking (splicing) of multiple ducts, which greatly saves the space, materials, and engineering required for duct installation.

[0036] The above embodiments and drawings do not limit the product form and style of the present invention, and any appropriate changes and modifications made by ordinary skilled persons in the art shall be considered as not departing from the scope of the present invention.

Claims

1. A new type of sound attenuating duct sheet material, characterized by: The sheet is composed of inner layer PET material, middle layer high-density polyester fiber plate and outer layer aluminum foil, the sheet is rectangular, at least two "V" shape shallow grooves are arranged on the sheet, the "V" shape shallow grooves cut the inner layer PET material, cut or partially cut the middle layer high-density polyester fiber plate, and do not cut the outer layer aluminum foil, so as to separate the sheet into at least three side wall areas from the inner side; the two edges of the sheet parallel to the "V" shape shallow grooves are respectively provided with corresponding bevels or corresponding step edges.

2. The new type of sound attenuating air duct sheet material as claimed in claim 1, characterized in that: The opening angle of the "V" shape shallow groove is 60-120 degrees.

3. The new type of sound attenuating air duct sheet material as claimed in claim 1, characterized in that: Three "V" shape shallow grooves are arranged on the sheet, so as to separate the sheet into four side wall areas from the inner side, which are first side wall area, second side wall area, third side wall area and fourth side wall area in sequence, the first side wall area and the third side wall area have the same width, and the second side wall area and the fourth side wall area have the same width.

4. A new type of sound attenuating air duct sheet material as claimed in claim 3, characterized in that: The opening angle of the "V" shape shallow groove is 90 degrees.

5. The new type of sound attenuating air duct sheet material as claimed in claim 1, characterized in that: The inner layer PET material and the middle layer high-density polyester fiber plate further extend to one end and / or both ends of the direction parallel to the "V" shape shallow groove by a certain length L compared with the outer layer aluminum foil.

6. A new type of sound attenuating air duct sheet material as claimed in claim 5, characterized in that: The certain length L of the further extension forms a step edge outside the middle layer high-density polyester fiber plate, and the thickness s of the step edge is one fifth to two thirds of the thickness H of the sheet.

7. A new and improved all-air sound attenuation duct, characterized by: The novel sound attenuation duct sheet of any one of claims 1-6 is folded inward, each "V" shape shallow groove is clamped and adhered, and the corresponding bevels or corresponding step edges of the two edges of the sheet parallel to the "V" shape shallow groove are adhered and fixed to each other, thereby forming a novel full-air sound attenuation duct penetrating front and back, and the cross section of the novel full-air sound attenuation duct is polygonal.

8. A novel all-air sound attenuation air duct as claimed in claim 7, characterized in that: The cross section is square.

9. The novel all-air sound attenuation air duct of claim 7, wherein: The novel full-air sound attenuation duct has an installation end at the front end and / or the rear end, which is formed by the further extension of the middle layer high-density polyester fiber by a certain length.

10. A novel all-air sound attenuation air duct as claimed in claim 9, wherein: The outer size of the installation end is smaller than the outer size of the ventilation pipe body.

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