Sound insulation and noise reduction air duct

Abstract

The utility model discloses a sound insulation and noise reduction air duct which comprises an air guide pipe, an air inlet fan for introducing external air is installed on the air guide pipe, a composite noise reduction plate is installed in the air guide pipe, and a liquid injection hole for dropwise adding scented water is formed in the position, over the composite noise reduction plate, of the upper face of the air guide pipe. And an air outlet for exhausting air into a room is formed below the air guide pipe. According to the sound insulation and noise reduction air channel, noise can be effectively reduced through staggered arrangement of the composite noise reduction plates, air can effectively penetrate through the sound insulation and noise reduction air channel while noise is reduced, the pressure of air circulation at the S-shaped channel is reduced, wind resistance is reduced, and the ventilation efficiency is improved. In addition, scented water is injected into the polyester fiber cotton through the liquid injection hole, air can be scented while ventilation is conducted, and better experience can be brought to indoor people.

Description

Technical Field

[0001] This utility model relates to the field of air duct technology, and in particular to sound insulation and noise reduction air ducts. Background Technology

[0002] Soundproof and silent cabins require air exchange between the interior and exterior. Due to the characteristics of soundproof and silent cabin products, which require high sound insulation, direct air exchange between the interior and exterior is not conducive to sound insulation, as it will allow outdoor sounds and fan noise to enter, affecting the sound insulation effect of the soundproof room. Therefore, we propose a sound insulation and noise reduction air duct. Utility Model Content

[0003] The main purpose of this invention is to provide a soundproof and noise-reducing air duct, which can effectively solve the problems in the background technology.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] The soundproof and noise-reducing air duct includes an air duct with an air intake fan for introducing external air installed on it. A composite noise reduction plate is installed inside the air duct. An injection hole for adding fragrance is installed on the top of the air duct directly above the composite noise reduction plate. An air outlet for discharging air into the room is opened at the bottom of the air duct.

[0006] Preferably, multiple composite noise reduction plates are provided in the air duct, and are staggered and installed on the front and rear surfaces inside the air duct.

[0007] Preferably, the composite noise reduction board includes a honeycomb panel for sound absorption, a mounting frame installed on the side of the honeycomb panel, and polyester fiber cotton embedded in the mounting frame.

[0008] Preferably, the density of the polyester fiber cotton is 0.4–0.6 g / cm³. 3 The honeycomb holes on the honeycomb plate are through-holes.

[0009] Preferably, the air outlet is located indoors, and the air intake fan is connected to the outside via a duct.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] In this invention, the sound insulation and noise reduction duct can effectively reduce noise through the staggered arrangement of composite noise reduction panels. At the same time, it can effectively allow air to pass through, reduce the air pressure at the S-shaped channel, reduce wind resistance and improve ventilation efficiency. In addition, fragrance can be injected into the polyester fiber cotton through the injection hole, which can freshen the air while ventilating, and bring a better experience to people in the room. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the sound insulation and noise reduction air duct of this utility model;

[0013] Figure 2 This is a sectional view of the air duct of the sound insulation and noise reduction air duct of this utility model;

[0014] Figure 3 This is a partial cross-sectional view of the air duct of the sound insulation and noise reduction air duct of this utility model;

[0015] Figure 4 The sound insulation and noise reduction air duct of this utility model Figure 3 Enlarged view of point A in the middle;

[0016] Figure 5 This is a large-scale disassembly display of the composite noise reduction panel of the sound insulation and noise reduction air duct of this utility model.

[0017] In the diagram: 1. Air duct; 2. Air intake fan; 3. Composite noise reduction board; 31. Honeycomb panel; 32. Mounting frame; 33. Polyester fiber cotton; 4. Liquid injection hole; 5. Air outlet. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0019] Example 1:

[0020] like Figure 1-5 As shown, the sound insulation and noise reduction air duct includes an air duct 1, an air intake fan 2 for introducing external air is installed on the air duct 1, a composite noise reduction plate 3 is installed inside the air duct 1, an injection hole 4 for adding fragrance is installed on the top of the air duct 1 directly above the composite noise reduction plate 3, and an air outlet 5 for exhausting air into the room is opened at the bottom of the air duct 1.

[0021] Multiple composite noise reduction panels 3 are provided in the air duct 1, and are staggered and installed on the front and rear surfaces inside the air duct 1.

[0022] Specifically, because the air inlet of the duct is located outdoors, outdoor noise and fan noise can easily be transmitted indoors, affecting users' work or rest. The composite noise reduction panels 3 are arranged in an alternating pattern in the air duct 1, which allows air to pass smoothly through an S-shaped channel. Since sound travels in a different way, it cannot completely bypass the bend. The composite noise reduction panels 3 block the sound layer by layer, thus achieving sound absorption and insulation, and converting the energy of the sound.

[0023] The composite noise reduction panel 3 includes a honeycomb panel 31 for sound absorption, a mounting frame 32 installed on the side of the honeycomb panel 31, and polyester fiber cotton 33 embedded in the mounting frame 32.

[0024] Specifically, the honeycomb panel 31 is used for sound absorption, and the mounting frame 32 is used to fix the polyester fiber cotton 33 to the end of the honeycomb holes on the honeycomb panel 31, so as to block and absorb the passing noise again, thus playing the role of sound insulation and noise reduction.

[0025] The density of polyester fiber cotton 33 is 0.4–0.6 g / cm³. 3 The honeycomb holes on the honeycomb panel 31 are through-holes.

[0026] Specifically, the density setting of polyester fiber cotton 33 can play a role in sound absorption and insulation on the one hand, and allow some of the introduced air to pass through on the other hand, reducing wind resistance, thereby avoiding wind noise and improving ventilation efficiency. The honeycomb holes on the honeycomb panel 31 are through, which is intended to allow airflow.

[0027] Air outlet 5 is located indoors, and air intake fan 2 is connected to the outside through a duct;

[0028] Specifically, the air intake fan 2 is installed outdoors to introduce fresh air, and the air outlet 5 exhausts fresh air into the room.

[0029] It should be noted that this utility model is a soundproof and noise-reducing air duct. In use, fresh air from the outside is introduced through the intake fan 2 and enters the air duct 1. Then, the air duct 1 is divided. The composite noise reduction plate 3, which is located at the air outlet 5 near the indoor entrance, can reduce and absorb the noise from the fan and the outside, thereby converting sound energy into heat energy for dissipation. At the same time, the composite noise reduction plate 3 allows air to pass through, reducing the air duct resistance and improving the ventilation efficiency. Then, the fresh air is discharged into the room from the air outlet 5. The liquid injection hole 4 can be used to add air freshener to the polyester fiber cotton 33 for diffusion. Then, it can be dispersed into the room through the introduced gas, bringing a fresher smell to the room.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A soundproof and noise-reducing air duct, characterized in that: Includes a duct (1), on which an air intake fan (2) for introducing external air is installed, and a composite noise reduction plate (3) is installed inside the duct (1). An injection hole (4) for adding fragrance is installed on the top of the duct (1) directly above the composite noise reduction plate (3). An air outlet (5) for discharging air into the room is opened at the bottom of the duct (1).

2. The sound insulation and noise reduction duct according to claim 1, characterized in that: Multiple composite noise reduction plates (3) are provided in the air duct (1) and are arranged alternately on the front and rear surfaces inside the air duct (1).

3. The sound insulation and noise reduction duct according to claim 2, characterized in that: The composite noise reduction panel (3) includes a honeycomb panel (31) for sound absorption, a mounting frame (32) installed on the side of the honeycomb panel (31), and polyester fiber cotton (33) embedded in the mounting frame (32).

4. The sound insulation and noise reduction duct according to claim 3, characterized in that: The density of the polyester fiber cotton (33) is 0.4-0.6 g / cm 3 The honeycomb holes on the honeycomb plate (31) are front and back through.

5. The sound insulation and noise reduction duct according to claim 4, characterized in that: The air outlet (5) is located indoors, and the air intake fan (2) is connected to the outside through a pipe.

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