Sound insulation cover for axial flow fan

Abstract

The utility model relates to the related technical field of axial flow fan noise treatment, and one embodiment of the utility model provides a sound insulation cover for an axial flow fan, the sound insulation cover comprises a wrapping shell and an air outlet cover, the air outlet cover is arranged at the outer end of the wrapping shell, a steering connecting assembly is arranged between the wrapping shell and the air outlet cover, and brackets are fixed in the wrapping shell; the fixed installation assembly is arranged on the wrapping shell, the noise reduction assembly is arranged in the wrapping shell and the air outlet cover, the fixed installation assembly comprises a pair of fixing blocks, the fixing blocks are arranged at the two opposite ends of the outer surface of the wrapping shell respectively, tensioning screws are rotationally connected into the fixing blocks in a sleeved mode, and one ends of the tensioning screws are connected with pressing plates in a threaded fit mode. By means of the technical scheme, the technical problem that in the prior art, high-speed rotation of a fan impeller, motor operation, friction between airflow and fan components and noise of an axial flow fan are likely to be overlapped with noise of other equipment, and a high-strength noise environment is formed is solved.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the technical field of noise control for axial flow fans, and more specifically, to a soundproof cover for an axial flow fan. Background Technology

[0002] Axial flow fans, with their simple structure and high ventilation efficiency, are widely used in industrial production, building ventilation, and heat dissipation of various equipment. In factories, a large number of axial flow fans work together to deliver fresh air to the workshop and exhaust waste gas; in the ventilation systems of high-rise buildings, axial flow fans are responsible for maintaining air circulation and ensuring the comfort of the indoor environment.

[0003] However, axial flow fans generate significant noise during operation, causing considerable disruption to people's lives and work. The noise primarily originates from the high-speed rotation of the fan impeller, the operation of the motor, and the friction between the airflow and fan components. In industrial settings, the noise from axial flow fans can overlap with that from other equipment, creating a high-intensity noise environment. Prolonged exposure to such an environment can not only lead to hearing damage but also cause fatigue, difficulty concentrating, and other problems, ultimately impacting work efficiency and production safety.

[0004] In locations with high noise control requirements, such as hospitals, schools, and residential areas, the noise problem of axial flow fans is even more pronounced. Hospitals need a quiet environment to ensure patients' rest and recovery, schools need to create a good learning atmosphere for teachers and students, and residential areas are concerned with residents' quality of life. However, existing axial flow fans usually lack effective sound insulation measures; simple casings cannot block noise transmission, which limits the application of axial flow fans in these locations.

[0005] Therefore, it is urgent to develop a soundproof cover for axial flow fans to reduce the noise generated during operation of axial flow fans and meet the needs of different usage scenarios. Utility Model Content

[0006] To overcome the above-mentioned defects, the embodiments of this disclosure provide a soundproof cover for an axial flow fan, which solves the technical problem in the prior art that the high-speed rotation of the fan impeller, the operation of the motor, and the friction between the airflow and the fan components may cause the noise of the axial flow fan to be superimposed with the noise of other equipment, forming a high-intensity noise environment.

[0007] According to one aspect, at least one embodiment of this disclosure provides a soundproof enclosure for an axial flow fan, comprising:

[0008] The package includes an outer shell and an air vent, wherein the air vent is disposed at the outer end of the outer shell;

[0009] The steering connection assembly is disposed between the outer casing and the vent hood;

[0010] Several brackets and a fixing and mounting assembly, wherein the brackets are all fixed inside the package shell, and the fixing and mounting assembly is disposed on the package shell;

[0011] A noise reduction component is disposed inside the outer casing and the vent hood;

[0012] The fixed installation assembly includes a pair of fixing blocks, which are respectively disposed at opposite ends of the outer surface of the outer casing. A tensioning screw is rotatably connected inside the fixing block, and a pressure plate is threadedly connected to one end of the tensioning screw.

[0013] As a further technical solution, a pair of notches are provided on the outer end face of the outer casing, the clamping plate is located in the notches, and a pair of guide rods are provided on the surface of the fixing block, with one end of the guide rods being slidably connected to the clamping plate.

[0014] As a further technical solution, the noise reduction component includes sound-absorbing cotton, which is attached to the inner surface of the outer casing around the perimeter. A docking cover is provided on the outer surface of the outer casing, and an ejector layer is provided around the inner surface of the docking cover.

[0015] As a further technical solution, a baffle is provided inside the vent hood, and a raised layer is provided on the inner surface of the vent hood, with a reflective groove formed on the surface of the raised layer.

[0016] As a further technical solution, the steering connection assembly includes a slide rail, which is arranged around the outer surface of the docking cover, and a connecting sleeve is provided on the surface of the air vent cover, the connecting sleeve being slidably connected to the outside of the slide rail.

[0017] As a further technical solution, an annular layer is provided around the outer surface of the docking cover, and several slots are provided on the surface of the annular layer. Several limiting rods are provided on the surface of the air outlet cover, and the surface of the limiting rods protrudes outward and is embedded in the slots.

[0018] As a further technical solution, the shield is a bent transition structure, and the surface of the convex layer is an umbrella-shaped raised structure.

[0019] As a further technical solution, the gap between the bracket and the inner wall of the outer casing is greater than the thickness of the sound-absorbing cotton.

[0020] As a further technical solution, the vent hood is provided with several grid bars.

[0021] The beneficial effects of the embodiments disclosed herein are as follows:

[0022] 1. The beneficial effects of the fixed installation component in this disclosure are that the fixing block provides support for the installation, the threaded engagement between the tensioning screw and the pressure plate allows for flexible adjustment of the clamping force, the guide rod ensures that the pressure plate moves smoothly, and ensures that the axial flow fan is firmly installed inside the enclosure, avoiding shaking during operation and generating additional noise, thereby enhancing the stability of equipment operation.

[0023] 2. In this disclosure, the beneficial effect of the steering connection component is that the slide rail and the connecting sleeve enable the air outlet hood to rotate circumferentially, which facilitates the adjustment of the air outlet angle and meets the ventilation needs of different scenarios. The slot and the limit rod work together to limit the air outlet hood, ensuring that it is stably fixed after the angle is adjusted, and can withstand external forces, ensuring reliable connection and improving the flexibility and stability of equipment use.

[0024] 3. In this disclosure, the beneficial effects of the noise reduction component are that the sound-absorbing cotton initially absorbs noise and reduces internal reflection and propagation, the ejector layer reflects and scatters noise and consumes noise energy, and the baffle, convex layer and reflective groove work together to change the noise propagation path, causing it to reflect and refract multiple times, increasing energy loss, and effectively reducing the outward propagation of noise generated by the axial flow fan, creating a quiet environment. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0026] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure;

[0027] Figure 2 This is an isometric drawing of the present disclosure;

[0028] Figure 3 This is an isometric drawing from another perspective of this disclosure;

[0029] Figure 4 This is an isometric sectional view of the present disclosure;

[0030] Figure 5 Appendix to this disclosure Figure 4 Enlarged view of part A in the middle;

[0031] In the diagram: 1. Outer shell; 2. Vent hood; 3. Bracket; 4. Fixing assembly; 4-1. Fixing block; 4-2. Tensioning screw; 4-3. Pressure plate; 4-4. Notch; 4-5. Guide rod; 5. Noise reduction assembly; 5-1. Sound-absorbing cotton; 5-2. Docking cover; 5-3. Ejector layer; 5-4. Baffle; 5-5. Raised layer; 5-6. Reflective groove; 6. Steering connection assembly; 6-1. Slide rail; 6-2. Connecting sleeve; 6-3. Annular layer; 6-4. Slot; 6-5. Limiting rod; 7. Grille rod. Detailed Implementation

[0032] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0033] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0034] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0035] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0037] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0038] like Figures 1-5 As shown, a soundproof enclosure for an axial flow fan according to an embodiment of the present disclosure is provided, comprising:

[0039] The package includes an outer shell 1 and an air vent 2, wherein the air vent 2 is disposed at the outer end of the outer shell 1;

[0040] The steering connection assembly 6 is disposed between the outer casing 1 and the vent 2;

[0041] A plurality of brackets 3 and a fixing and mounting assembly 4, wherein the brackets 3 are all fixed inside the outer casing 1, and the fixing and mounting assembly 4 is disposed on the outer casing 1;

[0042] Noise reduction component 5, wherein the noise reduction component 5 is disposed inside the outer casing 1 and the air vent 2;

[0043] The fixed installation assembly 4 includes a pair of fixing blocks 4-1, which are respectively disposed at opposite ends of the outer surface of the outer casing 1. A tensioning screw 4-2 is rotatably connected inside the fixing block 4-1. One end of the tensioning screw 4-2 is threadedly connected to a pressure plate 4-3. A pair of notches 4-4 are opened on the outer end face of the outer casing 1. The pressure plate 4-3 is located in the notches 4-4. A pair of guide rods 4-5 are provided on the surface of the fixing block 4-1. One end of the guide rod 4-5 is slidably connected to the pressure plate 4-3.

[0044] In some examples, during the installation of the axial flow fan, to achieve a stable assembly between the axial flow fan and the outer casing 1, and to prevent the fan from shaking inside the casing and affecting its operation, a fixed installation component 4 is designed. This component includes a pair of fixing blocks 4-1 located at opposite ends on the outer surface of the outer casing 1, providing basic support for the entire installation and fixing structure. A tensioning screw 4-2 is rotatably fitted inside the fixing block 4-1, with one end connected to a pressure plate 4-3 via a threaded connection, forming the main fixing structure. When the tensioning screw 4-2 is rotated, the pressure plate 4-3 can be adjusted through the threaded drive. 3. Moving along the screw axis, it wraps around a pair of notches 4-4 on the outer end face of the outer casing 1, providing space for the movement of the pressure plate 4-3, allowing the pressure plate 4-3 to move within the notches 4-4 and apply pressure to the axial flow fan. A pair of guide rods 4-5 are provided on the surface of the fixing block 4-1, one end of which is slidably connected to the pressure plate 4-3, serving as a guide and limiter. The guide rods 4-5 ensure that the pressure plate 4-3 remains stable during movement, avoiding deviation or tilting, and ensuring that the pressure plate 4-3 applies pressure to the axial flow fan evenly, thereby achieving reliable fixation.

[0045] like Figures 1-5 As shown in the figure, the noise reduction component 5 proposed in this embodiment includes sound-absorbing cotton 5-1, which is attached to the inner surface of the outer casing 1 around the perimeter. The outer surface of the outer casing 1 is provided with a docking cover 5-2, and the inner surface of the docking cover 5-2 is provided with an ejector layer 5-3 around the perimeter. The air vent 2 is provided with a baffle 5-4 inside, and the inner surface of the air vent 2 is provided with a protruding layer 5-5. The surface of the protruding layer 5-5 is provided with a reflective groove 5-6.

[0046] In some examples, the noise generated by the axial flow fan during operation can affect the surrounding environment. To reduce the noise generated by the axial flow fan within the outer casing 1 and the exhaust hood 2, a noise reduction component 5 is designed. This component includes sound-absorbing cotton 5-1 that adheres to the inner surface of the outer casing 1. The sound-absorbing cotton 5-1 can absorb some of the noise generated by the axial flow fan during operation, reducing the reflection and propagation of noise within the outer casing 1, thus playing a preliminary noise reduction role. The docking cover 5-2 is provided on the outer surface of the outer casing 1, and the ejector layer 5-3 is provided around its inner surface to further reduce noise. The noise from 1 is reflected and scattered, causing the noise energy to be continuously consumed within the docking cover 5-2, further reducing the outward transmission of noise. The baffle 5-4 set inside the exhaust cover 2 can change the path of noise propagation, causing the noise to be reflected and refracted multiple times within the exhaust cover 2, thereby consuming noise energy. The convex layer 5-5 set on the inner surface of the exhaust cover 2, and the reflective grooves 5-6 opened on the surface of the convex layer 5-5, can irregularly reflect the noise, disrupt the direction of noise propagation, and make the noise form a complex propagation path within the exhaust cover 2, increasing the loss of noise energy and effectively reducing the noise intensity transmitted from the exhaust cover 2.

[0047] like Figures 1-5 As shown in the figure, the steering connection assembly 6 in this embodiment includes a slide rail 6-1, which is arranged around the outer surface of the docking cover 5-2. A connecting sleeve 6-2 is provided on the surface of the vent cover 2. The connecting sleeve 6-2 is slidably connected to the outside of the slide rail 6-1. An annular layer 6-3 is provided around the outer surface of the docking cover 5-2. A plurality of slots 6-4 are provided on the surface of the annular layer 6-3. A plurality of limiting rods 6-5 are provided on the surface of the vent cover 2. The limiting rods 6-5 protrude outward and are embedded in the slots 6-4.

[0048] In some examples, during the use of axial flow fans, in order to flexibly adjust the exhaust angle of the exhaust hood 2 to meet different usage requirements, a steering connection assembly 6 is designed. This assembly includes a slide rail 6-1 set around the outer surface of the docking cover 5-2, providing a sliding track foundation for the rotation of the exhaust hood 2. A connecting sleeve 6-2 set on the surface of the exhaust hood 2 slides around the outside of the slide rail 6-1, allowing the exhaust hood 2 to rotate circumferentially along the slide rail 6-1, thereby achieving initial adjustment of the exhaust angle. An annular layer 6-3 set around the outer surface of the docking cover 5-2 has several slots 6-4 on its surface, which cooperate with several limiting rods 6-5 set on the surface of the exhaust hood 2. The limiting rods 6-5 protrude outward and are embedded in the slots 6-4. This structure can not only limit the rotation position of the exhaust hood 2, ensuring that the exhaust hood 2 can be stably fixed after being adjusted to a suitable angle, but also withstand the external force during the rotation of the exhaust hood 2 to a certain extent, ensuring the reliability of the connection.

[0049] For example, such as Figure 4 As shown, the shield 5-4 has a bent transition structure, and the surface of the convex layer 5-5 is an umbrella-shaped raised structure.

[0050] In some examples, the flow path of gas and noise can be changed by bending the transition structure so that the noise can be better eliminated by the convex layer 5-5 and the reflective groove 5-6.

[0051] For example, such as Figure 3 As shown, the distance between the bracket 3 and the inner wall of the outer casing 1 is greater than the thickness of the sound-absorbing cotton 5-1.

[0052] In some examples, larger intervals allow the sound-absorbing cotton 5-1 enough space to eliminate noise.

[0053] For example, such as Figure 2 As shown, the vent hood 2 is provided with a number of grid bars 7.

[0054] In some examples, the grille bar 7 is used to concentrate the exhaust and prevent dust from easily entering.

[0055] In actual use: the axial flow fan is placed between the brackets 3 inside the outer casing 1. The tension screw 4-2 is rotated to move the pressure plate 4-3 under the guidance of the guide rod 4-5, thereby pressing the axial flow fan to achieve fixation. According to the usage requirements, the connecting sleeve 6-2 slides on the slide rail 6-1 and the angle of the exhaust hood 2 is adjusted by using the limit rod 6-5 and the slot 6-4. When the axial flow fan generates noise, the sound-absorbing cotton 5-1 absorbs part of the noise, the ejector layer 5-3 reflects and scatters the noise, the baffle 5-4, the convex layer 5-5 and the reflective groove 5-6 change the noise propagation path and consume energy, and the grille rod 7 concentrates the exhaust and blocks dust from entering.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A soundproof cover for an axial flow fan, characterized in that, include: The enclosure (1) and the vent (2) are provided at the outer end of the enclosure (1); The steering connection assembly (6) is disposed between the outer casing (1) and the vent hood (2); A plurality of brackets (3) and a fixing assembly (4), wherein the brackets (3) are all fixed inside the outer casing (1) and the fixing assembly (4) is disposed on the outer casing (1); Noise reduction component (5), the noise reduction component (5) is disposed inside the outer casing (1) and the vent hood (2); The fixed installation assembly (4) includes a pair of fixing blocks (4-1), which are respectively disposed at opposite ends on the outer surface of the outer casing (1). A tensioning screw (4-2) is rotatably fitted inside the fixing block (4-1), and a pressure plate (4-3) is connected to one end of the tensioning screw (4-2) by a threaded connection.

2. The soundproof cover for an axial flow fan according to claim 1, characterized in that, The outer end face of the outer casing (1) is provided with a pair of notches (4-4), the pressing plate (4-3) is located in the notches (4-4), and the surface of the fixing block (4-1) is provided with a pair of guide rods (4-5). One end of the guide rod (4-5) is slidably connected to the pressing plate (4-3).

3. The soundproof cover for an axial flow fan according to claim 1, characterized in that, The noise reduction component (5) includes sound-absorbing cotton (5-1), which is attached to the inner surface of the outer casing (1) around the perimeter. The outer surface of the outer casing (1) is provided with a docking cover (5-2), and the inner surface of the docking cover (5-2) is provided with an ejector layer (5-3).

4. The soundproof cover for an axial flow fan according to claim 3, characterized in that, The vent hood (2) is provided with a baffle (5-4) inside, and a protrusion (5-5) is provided on the inner surface of the vent hood (2). A reflective groove (5-6) is opened on the surface of the protrusion (5-5).

5. A soundproof cover for an axial flow fan according to claim 3, characterized in that, The steering connection assembly (6) includes a slide rail (6-1), which is arranged around the outer surface of the docking cover (5-2). The surface of the air vent cover (2) is provided with a connecting sleeve (6-2), which is slidably connected to the outside of the slide rail (6-1).

6. A soundproof cover for an axial flow fan according to claim 5, characterized in that, The outer surface of the docking cover (5-2) is provided with an annular layer (6-3), and the surface of the annular layer (6-3) is provided with a number of slots (6-4). The surface of the air vent cover (2) is provided with a number of limiting rods (6-5), and the surface of the limiting rods (6-5) protrudes outward and is embedded in the slots (6-4).

7. A soundproof cover for an axial flow fan according to claim 4, characterized in that, The shield (5-4) has a bent transition structure, and the surface of the convex layer (5-5) is an umbrella-shaped raised structure.

8. A soundproof cover for an axial flow fan according to claim 3, characterized in that, The gap between the bracket (3) and the inner wall of the outer casing (1) is greater than the thickness of the sound-absorbing cotton (5-1).

9. A soundproof cover for an axial flow fan according to claim 1, characterized in that, The vent hood (2) is provided with several grid bars (7).

Images