U-shaped impedance type anechoic chamber

Abstract

The utility model discloses a kind of U-shaped impedance formula noiseless static pressure tank, including first box, deflector and air inlet, the one end of the first box is connected with the one end of second box, and the other end of second box is connected with the one end of third box;The utility model is provided with first box, second box and third box, static pressure tank body is composed of first box, second box and third box three parts, and first box, second box and third box are all composed of box plate, it is convenient to customize according to use environment space, after customization is completed, transport to installation position, using modular assembly mode can improve installation efficiency, and in maintenance process, the module that can be individually replaced appears fault, save cost.

Description

Technical Field

[0001] This utility model specifically relates to the technical field of static pressure boxes, and specifically to a U-shaped impedance-type silencing static pressure box. Background Technology

[0002] A plenum chamber, also known as a pressure stabilizing chamber, is a large, open-cell enclosure connected to an air outlet. It is typically made of metal or other materials and is connected to a ventilation duct system. The plenum chamber converts some dynamic pressure into static pressure, increasing the static pressure of the supplied air, allowing the air to travel further and be more evenly distributed across the air supply area, thus improving the air supply effect. Referring to the "An Impedance-Type Silencing Plenum Chamber" disclosed in announcement number "CN222230870U", it includes a plenum chamber with an air inlet fixedly opened on one side. A first ventilation pipe is fixedly installed on the front end face of the air inlet, and a first connecting flange is fixedly installed on the front end face of the first ventilation pipe. Multiple first bolt holes are fixedly installed on all four sides of the first connecting flange.

[0003] Traditional silencing plenum chambers rely on large-volume structures to achieve uniform static pressure distribution and low-frequency noise reduction. However, due to space constraints, medical and civil buildings are often forced to adopt non-standard sizes or simplified designs, resulting in reduced noise reduction capabilities. The simplified structure is prone to generating airflow-generated noise, such as high-frequency howling. At the same time, equipment vibration is transmitted to the building structure through the rigid connection of the chamber, which may interfere with the operation of precision medical equipment or cause the risk of building resonance. Utility Model Content

[0004] The purpose of this invention is to provide a U-shaped impedance-type silencing static pressure box to solve the problems mentioned in the background art, such as the simplified structure currently in use easily generating airflow regenerated noise, such as high-frequency howling, and the equipment vibration being transmitted to the building structure through the rigid connection of the box, which may interfere with the operation of precision medical equipment or cause the risk of building resonance.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A U-shaped impedance-type silencer static pressure box includes a first box body, a guide vane and an air inlet, wherein one end of the first box body is connected to one end of a second box body, and the other end of the second box body is connected to one end of a third box body.

[0007] The top of the first housing has a first exhaust vent; the top of the second housing has a second exhaust vent; the top of the third housing has a third exhaust vent.

[0008] As a further embodiment of this utility model: two guide vanes are provided, one of which is located between the first box and the second box, while the other guide vane is located between the second box and the third box.

[0009] As a further embodiment of this utility model: the first box, the second box, and the third box are all composed of welded box plates, and pressure strips are provided at the connection points of the first box, the second box, and the third box.

[0010] As a further embodiment of this utility model: the pressure strip includes an outer plate, sound-absorbing cotton and an inner plate; the sound-absorbing cotton is disposed between the outer plate and the inner plate, and the inner plate has a mesh structure.

[0011] As a further embodiment of this utility model: the two guide vanes are symmetrically distributed, and the top of the guide vanes has an arc-shaped structure.

[0012] As a further embodiment of this utility model: the size of the air inlet is larger than the size of the third air outlet, and the size of the third air outlet is the same as the size of the second air outlet, while the size of the second air outlet is larger than the size of the first air outlet.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model is provided with a box panel, which is the basic component of the entire static pressure box. Its body is a composite structure, combining galvanized micro-perforated plate and sound-absorbing cotton. By superimposing sound-absorbing layer and flow guiding layer, a compact layout is achieved. Under the condition of thinness of 50mm, a wideband noise reduction of 20-30dB(A) can be achieved.

[0015] 2. This utility model is provided with a first box, a second box, and a third box. The static pressure box body is composed of three parts: the first box, the second box, and the third box. The first box, the second box, and the third box are all composed of box panels, which can be customized according to the space of the usage environment. After customization, it can be transported to the installation location. The modular assembly method can improve the installation efficiency, and the faulty module can be replaced individually during maintenance, saving costs.

[0016] 3. This utility model is equipped with a guide vane, which facilitates the guidance of airflow inside the box and can effectively reduce airflow turbulence. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a three-dimensional structural diagram of the first box in this practical application.

[0019] Figure 3 This is a utility model Figure 1 Another perspective view.

[0020] Figure 4 This is a utility model Figure 3Cross-sectional view along the AA direction.

[0021] Figure 5 This is a three-dimensional structural diagram of the middle box panel of this utility model.

[0022] Figure 6 This is a utility model Figure 5 Another perspective view.

[0023] Figure 7 This is a utility model Figure 3 Cross-sectional view in the middle BB direction.

[0024] Figure 8 This is a utility model Figure 4 A magnified view of point C.

[0025] In the diagram: 1-First enclosure, 2-Second enclosure, 3-Third enclosure, 4-Air inlet, 5-First exhaust vent, 6-Second exhaust vent, 7-Third exhaust vent, 8-Guide plate, 9-Box panel, 10-Pressure strip, 901-Outer panel, 902-Sound-absorbing cotton, 903-Inner panel. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-8 In this embodiment of the present invention, a U-shaped impedance-type silencing static pressure box includes a first box body 1, a guide vane 8, and an air inlet 4. One end of the first box body 1 is connected to one end of the second box body 2, and the other end of the second box body 2 is connected to one end of the third box body 3. A first exhaust vent 5 is provided on the top of the first box body 1. A second exhaust vent 6 is provided on the top of the second box body 2. A third exhaust vent 7 is provided on the top of the third box body 3. Two guide vanes 8 are provided, one of which is located between the first box body 1 and the second box body 2, and the other guide vane 8 is located between the second box body 2 and the third box body 3.

[0028] More specifically, sealing gaskets are installed between the first housing 1, the second housing 2, the third housing 3 and the guide plate 8 during installation, which can effectively reduce the vibration transmission between the first housing 1, the second housing 2 and the third housing 3.

[0029] As a further illustration of this embodiment, the guide vane 8 is made of 1.2mm thick Z80 galvanized sheet.

[0030] In this embodiment, the first box 1, the second box 2 and the third box 3 are all welded together from box plates 9, and pressure strips 10 are provided at the connection points of the first box 1, the second box 2 and the third box 3.

[0031] More specifically, there are three boxes: the first box 1, the second box 2, and the third box 3.

[0032] As a further explanation of this embodiment, the first box 1, the second box 2 and the third box 3 are reinforced and connected to the pressure strip 10 by aluminum rivets.

[0033] In this embodiment, the pressure strip 10 includes an outer plate 901, a sound-absorbing cotton 902, and an inner plate 903; the sound-absorbing cotton 902 is disposed between the outer plate 901 and the inner plate 903, and the inner plate 903 has a mesh structure.

[0034] To be more specific, the outer panel 901 uses 1.2mm thick Z80 galvanized sheet, and the inner panel 903 uses 0.6mm thick Z80 galvanized perforated sheet, with a perforation rate of 23%.

[0035] As a further explanation of this embodiment, the sound-absorbing cotton 902 is centrifugal glass wool with a density of 48 kg / m³.

[0036] In this embodiment, the two guide vanes 8 are symmetrically distributed, and the top of the guide vane 8 has an arc-shaped structure.

[0037] More specifically, the internal space is divided by the flow guide plate 8.

[0038] As a further explanation of this embodiment, the airflow is guided by the guide vane 8.

[0039] In this embodiment, the size of the air inlet 4 is larger than the size of the third air outlet 7, and the size of the third air outlet 7 is the same as the size of the second air outlet 6. At the same time, the size of the second air outlet 6 is larger than the size of the first air outlet 5.

[0040] More specifically, the air inlet 4, the first exhaust vent 5, the second exhaust vent 6, and the third exhaust vent 7 are all located on the same side, so that the airflow inside the box is in a "U" shape.

[0041] As a further explanation of this embodiment, the air inlet 4 is simultaneously located on the top of both the second housing 2 and the third housing 3.

[0042] The working principle of this utility model is as follows: Before use, the exterior of the first box 1, the second box 2 and the third box 3 need to be wrapped with water-repellent glass cloth. When the air inlet 4, the first air outlet 5, the second air outlet 6 and the third air outlet 7 are connected to the air duct, rubber shock-absorbing washers need to be installed. At the same time, an integrated base honeycomb structure needs to be set above the air inlet.

[0043] During use, airflow enters the first housing 1, the second housing 2, and the third housing 3 through the air inlet 4. Due to the increased space, the wind speed decreases. Two guide vanes 8 guide part of the airflow, causing it to be discharged through the second exhaust vent 6 and the third exhaust vent 7 respectively. At the same time, some airflow enters the interior of the first housing 1 and is discharged through the first exhaust vent 5. This diversion can effectively reduce the vibration and noise of the first exhaust vent 5, the second exhaust vent 6, and the third exhaust vent 7. Meanwhile, the sound-absorbing cotton 902, together with the holes on the inner panel 903, can greatly reduce the speed of the airflow on the inner walls of the first housing 1, the second housing 2, and the third housing 3, thereby further reducing vibration and noise.

[0044] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0045] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A U-shaped impedance-type silencer plenum chamber, characterized in that: It includes a first housing (1), a guide vane (8) and an air inlet (4), one end of the first housing (1) is connected to one end of the second housing (2), and the other end of the second housing (2) is connected to one end of the third housing (3); The top of the first housing (1) is provided with a first exhaust vent (5); the top of the second housing (2) is provided with a second exhaust vent (6); the top of the third housing (3) is provided with a third exhaust vent (7). The flow guide (8) is provided in two parts, one of which is located between the first box (1) and the second box (2), while the other flow guide (8) is located between the second box (2) and the third box (3).

2. The U-shaped impedance-type silencing static pressure box according to claim 1, characterized in that: The first box (1), the second box (2) and the third box (3) are all welded from box plates (9), and pressure strips (10) are provided at the connection points of the first box (1), the second box (2) and the third box (3).

3. The U-shaped impedance-type silencing static pressure box according to claim 1, characterized in that: The pressure strip (10) includes an outer plate (901), a sound-absorbing cotton (902), and an inner plate (903); the sound-absorbing cotton (902) is disposed between the outer plate (901) and the inner plate (903), and the inner plate (903) has a mesh structure.

4. A U-shaped impedance-type silencing static pressure box according to claim 1, characterized in that: The two guide vanes (8) are symmetrically distributed, and the top of the guide vanes (8) has an arc-shaped structure.

5. A U-shaped impedance-type silencing static pressure box according to claim 1, characterized in that: The size of the air inlet (4) is larger than the size of the third air outlet (7), and the size of the third air outlet (7) is the same as the size of the second air outlet (6). At the same time, the size of the second air outlet (6) is larger than the size of the first air outlet (5).

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