Static-pressure low-noise cabinet type fan

Abstract

A static-pressure low-noise cabinet type fan comprises a shell and a centrifugal fan. An air inlet and an air outlet are formed in the two opposite ends of the shell respectively, a partition plate is arranged in an inner cavity of the shell and divides the inner cavity into an air inlet cavity and a noise reduction cavity, the air inlet cavity is communicated with the air inlet, and the noise reduction cavity is communicated with the air outlet; the centrifugal fan is installed in the air inlet cavity, the partition plate is provided with a communicating port, and an exhaust port of the centrifugal fan communicates with the noise reduction cavity through the communicating port; the noise reduction cavity is provided with a noise reduction assembly. The inner cavity of the shell is divided into the air inlet cavity and the noise reduction cavity, and effective management of airflow is achieved; meanwhile, the noise reduction assembly is arranged in the noise reduction cavity, and the airflow must be subjected to noise reduction treatment before being exhausted through the air outlet, so that the noise reduction effect is greatly improved, and the comfort level of the working environment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a low-static-pressure and low-noise cabinet-type fan. Background Art

[0002] A fan is a machine that relies on the input mechanical energy to increase the gas pressure and discharge the gas. It is a driven fluid machine. The existing fans mainly consist of a housing, an air inlet, an air outlet, an impeller, a power device, etc. However, there are some problems and deficiencies in the existing fans.

[0003] First of all, during the operation of the fan, the noise generated at its air outlet is relatively large. This high-noise environment has an adverse impact on the physical and mental health of the surrounding staff. Working in a noisy environment for a long time is likely to cause problems such as hearing damage, inattention, and reduced work efficiency. Secondly, the noise reduction measures of the existing fans are often not perfect enough. Although some fans use simple sound insulation materials, the effects are often not satisfactory. The noise will still spread through various channels and affect the surrounding environment. Summary of the Utility Model

[0004] Aiming at the problems raised in the background art, the purpose of the present utility model is to provide a low-static-pressure and low-noise cabinet-type fan, which solves the problem of large noise of the existing fans.

[0005] To achieve this purpose, the present utility model adopts the following technical solutions:

[0006] A low-static-pressure and low-noise cabinet-type fan, comprising a housing and a centrifugal fan;

[0007] The two opposite ends of the housing are respectively provided with an air inlet and an air outlet. A partition board is arranged in the inner cavity of the housing. The partition board divides the inner cavity into an air inlet cavity and a noise reduction cavity. The air inlet cavity is communicated with the air inlet, and the noise reduction cavity is communicated with the air outlet;

[0008] The centrifugal fan is installed in the air inlet cavity. The partition board is provided with a communication port. The exhaust port of the centrifugal fan is communicated with the noise reduction cavity through the communication port;

[0009] The noise reduction cavity is provided with a noise reduction component.

[0010] Preferably, the noise reduction component includes a wind guide and sound-absorbing cotton;

[0011] The wind guide is installed on the partition board. The wind guide is used to diverge the air flow from the centrifugal fan to the noise reduction cavity;

[0012] The sound-absorbing cotton is installed on the inner wall of the housing. The sound-absorbing cotton is wrapped around the outer periphery of the wind guide.

[0013] Preferably, the air deflector is in the shape of a frustum of a pyramid and is formed by enclosing a number of air guide plates and connecting plates. The air guide plates are provided with a number of air-dispersing holes.

[0014] Preferably, the air guide plate is a flat plate in the shape of an isosceles trapezoid. The upper base of the air guide plate is connected to the connecting plate, and the lower base of the air guide plate is connected to the partition plate.

[0015] Preferably, one end face of the sound-absorbing cotton is connected to the inner side of the housing, and the other end face of the sound-absorbing cotton is in an uneven structure.

[0016] Preferably, the aperture of the micropores of the sound-absorbing cotton is less than 0.5 mm.

[0017] Preferably, the air inlet cavity is further provided with an air distribution plate, which is arranged between the centrifugal fan and the air inlet. The air distribution plate is provided with a number of air distribution holes distributed in an array.

[0018] Preferably, the housing includes a square shell and two end plates. The two end plates are detachably installed at the two open ends of the shell;

[0019] The air inlet is provided on one of the end plates, and the air outlet is provided on the other end plate.

[0020] Preferably, a number of mounting brackets are provided on the outer side of the end plate.

[0021] Compared with the prior art, one of the technical solutions in the above technical solutions has the following beneficial effects:

[0022] By dividing the inner cavity of the housing into an air inlet cavity and a noise reduction cavity, effective management of the air flow is achieved; at the same time, a noise reduction component is arranged in the noise reduction cavity, and the air flow must undergo noise reduction treatment before being discharged through the air outlet, which greatly improves the noise reduction effect and the comfort of the working environment. Description of the Drawings

[0023] Figure 1 is a schematic diagram of an embodiment of the present invention (hiding part of the housing structure);

[0024] Figure 2 is a structural schematic diagram of an embodiment of the present invention;

[0025] Figure 3 is a structural schematic diagram of another embodiment of the present invention;

[0026] Figure 4 is an exploded view of an embodiment of the present invention;

[0027] Figure 5 is an exploded view of an embodiment of the present invention from another angle.

[0028] Others: housing 1, shell 01, end plate 02, inner cavity 10, air inlet cavity 101, noise reduction cavity 102, air inlet 11, air outlet 12, partition plate 13, communication port 131, air distribution plate 14, air distribution holes 141, centrifugal fan 2, exhaust port 21, noise reduction component 3, air guide 31, air guide plate 311, air dispersion holes 3110, connecting plate 312, sound-absorbing cotton 32 and mounting bracket 4. Detailed implementation manners

[0029] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and should not be construed as a limitation to the present utility model.

[0030] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0031] In addition, the terms "first", "second" and "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second" and "third" may explicitly or implicitly include one or more of such features.

[0032] It should be noted that unless otherwise clearly defined and limited, the terms "mounted", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model may be understood according to specific situations.

[0033] The following combines the attached Figures 1 to 5 And further illustrates the technical solutions of the present utility model through specific implementation manners.

[0034] A low-noise cabinet fan with low static pressure includes a housing 1 and a centrifugal fan 2;

[0035] The two opposite ends of the housing 1 are respectively provided with an air inlet 11 and an air outlet 12. A partition plate 13 is arranged in the inner cavity 10 of the housing. The partition plate 13 divides the inner cavity 10 into an air inlet cavity 101 and a noise reduction cavity 102. The air inlet cavity 101 is communicated with the air inlet 11, and the noise reduction cavity 102 is communicated with the air outlet 12;

[0036] The centrifugal fan 2 is installed in the air inlet cavity 101. The partition plate 13 is provided with a communication port 131. The exhaust port 21 of the centrifugal fan 2 is communicated with the noise reduction cavity 102 through the communication port 131;

[0037] The noise reduction cavity 102 is provided with a noise reduction component 3.

[0038] The low-static-pressure and low-noise cabinet fan of the present utility model mainly includes two core components: a housing 1 and a centrifugal fan 2. The housing 1 serves as the frame structure of the entire fan, and an air inlet 11 and an air outlet 12 are respectively arranged at its two ends. This ensures the directionality of air flow and is conducive to improving the working efficiency of the fan. In the internal space of the housing 1, a partition plate 13 is introduced to divide the inner cavity 10 into two functional spaces: an air inlet cavity 101 and a noise reduction cavity 102. The air inlet cavity 101 is connected to the air inlet 11, while the noise reduction cavity 102 is communicated with the air outlet 12. This structure lays the foundation for noise reduction treatment.

[0039] The centrifugal fan 2 is installed in the air inlet cavity 101 and serves as the power source of the entire system. In order to enable the air flow generated by the centrifugal fan 2 to effectively enter the noise reduction cavity 102, a communication port 131 is designed on this partition plate 13. The exhaust port 21 of the centrifugal fan 2 forms a good connection with the noise reduction cavity 102 through this communication port 131. This enables the air flow to pass through the noise reduction cavity 102 before being discharged from the air outlet 12, providing sufficient space and time for noise reduction. The noise reduction component 3 arranged in the noise reduction cavity 102 reduces the noise generated by the air flow when passing through the noise reduction cavity 102. By reasonably designing the structure and materials of the noise reduction component 3, the sound waves generated during the air flow movement can be effectively absorbed and eliminated, thereby significantly reducing the noise level at the air outlet.

[0040] During the actual operation of the low-static-pressure and low-noise cabinet fan of the present utility model, air first enters the air inlet cavity 101 from the air inlet 11. In the air inlet cavity 101, the centrifugal fan 2 accelerates and pressurizes the air. Subsequently, the pressurized air enters the noise reduction cavity 102 through the communication port 131 on the partition plate 13. In the noise reduction cavity 102, the air flow passes through the carefully designed noise reduction component 3, and during this process, the noise carried by the air flow is effectively absorbed and eliminated. Finally, the air after noise reduction treatment is discharged from the air outlet 12. During the whole process, the noise is effectively controlled, and the air supply efficiency of the fan is not significantly affected.

[0041] This utility model solves the problem of high noise in traditional fans, significantly improves the usage environment of the fans, and is especially suitable for places with strict noise requirements, such as hospitals, libraries, offices and other areas that need to maintain a quiet environment. At the same time, its compact structural design also makes the fans more flexible and convenient to install and use.

[0042] Further, the noise reduction component 3 includes a wind guide 31 and a sound-absorbing cotton 32;

[0043] The wind guide 31 is installed on the partition plate 13, and the wind guide 31 is used to diverge the air outlet of the centrifugal fan 2 towards the noise reduction cavity 102;

[0044] The sound-absorbing cotton 32 is installed on the inner wall of the housing 1, and the sound-absorbing cotton 32 is wrapped around the outer periphery of the wind guide 31.

[0045] Through the wind guide 31 installed on the partition plate 13, the air outlet of the centrifugal fan 2 can be more evenly diverged into the noise reduction cavity 102. This helps to reduce the turbulence and eddy currents generated when the air flow directly impacts the inner wall or the outlet of the noise reduction cavity, thereby reducing the noise generated due to air flow disorder. At the same time, the wind guide 31 can also play a certain buffering role, making the air flow transition more smoothly and reducing the generation of noise. Since the sound-absorbing cotton 32 has good sound absorption performance, installing the sound-absorbing cotton 32 in the noise reduction cavity 102 (the inner wall of the housing 1), especially wrapping it around the outer periphery of the wind guide 31, can more effectively absorb the noise generated when the air flow passes through, significantly reducing the propagation and reflection of noise, thereby further enhancing the noise reduction effect of the fan.

[0046] Furthermore, the wind guide 31 is of a frustum structure, and the wind guide 31 is formed by enclosing a plurality of wind guide plates 311 and connecting plates 312, and a plurality of air dispersion holes 3110 are provided on the wind guide plates 311.

[0047] The wind guide 31 adopts a frustum structure, which is formed by enclosing a plurality of wind guide plates 311 and connecting plates 312, so that the air flow is fully guided and dispersed when entering the noise reduction cavity 102. A plurality of air dispersion holes 3110 are provided on the wind guide plates, further evenly dispersing the air flow. The structure of the wind guide 31 can effectively disperse the air flow pressurized by the centrifugal fan 2 along the direction of the plurality of wind guide plates 311. The dispersed air flow impacts the sound-absorbing cotton 32 outside the wind guide 31. Part of the sound is first blocked by the surface of the sound-absorbing cotton 32. In addition, the sound enters the micropores of the sound-absorbing cotton 32 and is converted into heat and absorbed; after the dispersed air flow fills the entire noise reduction cavity 102, all the dynamic pressure is converted into static pressure and is squeezed out from the air outlet 12.

[0048] Furthermore, the air deflector 311 is a flat plate in the shape of an isosceles trapezoid. The upper base of the air deflector 311 is connected to the connecting plate 312, and the lower base of the air deflector 311 is connected to the partition plate 13.

[0049] The design of the air deflector 311 in the shape of an isosceles trapezoid enables the air flow to be more evenly dispersed into the noise reduction chamber 102 when passing through. Since the upper base of the isosceles trapezoid is narrow and the lower base is wide, after the air flow is discharged from the centrifugal fan 2, it can gradually spread under the guidance of the air deflector 311, reducing the excessive concentration of local air flow, thereby reducing the generation of noise.

[0050] The air deflector adopts a flat plate structure in the shape of an isosceles trapezoid, which enables the air deflector 311 to disperse the air flow more evenly during the operation of the fan, reducing wind resistance and noise. The upper base of the air deflector 311 is connected to the connecting plate 312, and the lower base is connected to the partition plate 13. This connection method ensures the stability and continuity of the air flow inside the fan in terms of structure, thereby improving the static pressure performance of the fan and reducing noise. Through the above technical means, the fan can significantly reduce noise pollution and enhance the user experience while ensuring efficient operation.

[0051] Further explanation, the connecting plate 312 is used to connect multiple air deflectors 311, and the connecting plate is located at one end far from the partition plate 13 (the end close to the air outlet 12). No ventilation openings / holes are provided at the connecting plate 312, further preventing the high-pressure air flow from directly discharging from the air outlet 12, which cannot guarantee the low-noise effect of this fan.

[0052] Furthermore, one end face of the sound-absorbing cotton 32 is connected to the inner side of the housing 1, and the other end face of the sound-absorbing cotton 32 is an uneven structure.

[0053] One end face of the sound-absorbing cotton 32 is fixed to the inner side of the housing 1, which can make the sound-absorbing cotton 32 fit more closely to the inner side of the housing 1, increasing its stability and preventing it from falling off or loosening due to vibration during the operation of the fan. This close fit also helps to reduce the gap between the sound-absorbing cotton 32 and the housing 1, thereby reducing the possibility of noise transmission through the gap.

[0054] The other end face of the sound-absorbing cotton 32 is designed to be an uneven structure. This design can significantly increase the contact area between the sound-absorbing cotton 32 and the air flow, enabling the air flow to interact more fully with the sound-absorbing cotton 32 when passing through, thereby improving the sound-absorbing effect. Moreover, the uneven structure can also disrupt the air flow to a certain extent, causing more eddies and turbulences when the air flow passes through. These eddies and turbulences can more effectively convert sound energy into heat energy, thereby further reducing noise. At the same time, this uneven structure can also scatter and reflect sound waves, weakening the intensity of the sound waves, and thus reducing noise.

[0055] It should be noted that a variety of sound-absorbing materials can be flexibly applied, such as sound-absorbing cotton based on foam and fiber materials, to further optimize the noise reduction effect.

[0056] Furthermore, the pore diameter of the micropores of the sound-absorbing cotton 32 is less than 0.5 mm.

[0057] The sound-absorbing cotton 32 with a pore diameter of less than 0.5 mm for the micropores has a higher porosity and a more complex pore structure, which helps to more effectively capture and consume sound wave energy. When sound waves pass through these micropores, multiple reflections and scatterings will occur, thereby converting sound energy into heat energy and significantly reducing the propagation of noise.

[0058] This micropore design enables the sound-absorbing cotton 32 to more effectively absorb sound waves in a specific frequency range, especially mechanical noise and air flow noise generated during the operation of the fan, and can provide a quieter working environment.

[0059] Furthermore, the air inlet chamber 101 is also provided with an air distribution plate 14, the air distribution plate 14 is arranged between the centrifugal fan 2 and the air inlet 11, and the air distribution plate 14 is provided with a plurality of uniformly distributed air distribution holes 141 in an array.

[0060] The setting of the air distribution plate 14 can effectively evenly distribute the air flow entering from the air inlet 11. Through the uniformly distributed air distribution holes 141 in an array, the air flow can flow more smoothly towards the centrifugal fan 2, reducing the excessive concentration or lack of local air flow, thereby improving the uniformity of the air flow.

[0061] After the air flow passes through the air distribution holes 141 of the air distribution plate 14, its flow velocity and flow direction are optimized, and it can enter the blade area of the centrifugal fan 2 more smoothly. This helps to reduce the resistance and loss of the air flow inside the fan and improve the overall efficiency of the fan.

[0062] The design of the air distribution plate 14 and its air distribution holes 141 can reduce the eddy current and turbulence of the air flow inside the fan, thereby reducing the noise generated due to air flow disorder. At the same time, the uniform air flow distribution also helps to reduce the friction and collision between the fan blades and the air flow, further reducing the noise level.

[0063] It should be noted that the air distribution holes 141 can be set in various shapes and sizes, and the specific shape can be designed and optimized according to the specific working conditions. For example, it can be circular, oval or other geometric shapes, and the specific arrangement of these holes can also be in a square matrix, rhombus or other arrangements to achieve the best effect.

[0064] Through improvements in aspects such as optimizing air flow distribution, enhancing fan efficiency, reducing noise, and strengthening fan stability, this design solution of adding the air distribution plate 14 can significantly improve the overall performance of the fan. While maintaining low noise, the fan can operate more efficiently to meet the requirements of various application scenarios.

[0065] Furthermore, the housing 1 includes a square-shaped shell 01 and two end plates 02, and the two end plates 02 are detachably installed at the two open ends of the shell 01;

[0066] The air inlet 11 is provided on one of the end plates 02, and the air outlet 12 is provided on the other end plate 02.

[0067] The combination of the square-shaped shell 01 and the detachable end plates 02 forms a stable structure. This structure can resist the pressure and vibration of the external environment, ensuring the stability and reliability of the fan during operation. The two end plates 02 are detachably installed at the two open ends of the shell 01, which makes the internal components of the fan easier to be exposed, facilitating maintenance and repair work. When the fan fails or needs to be cleaned, the end plates can be quickly disassembled without disassembling the entire fan, thus saving time and cost.

[0068] Setting the air inlet 11 and the air outlet 12 on the two end plates 02 respectively helps to optimize the air flow path. This design enables the air flow to enter the fan more smoothly and, after the effective action of the centrifugal fan 2, be discharged smoothly from the other end. This helps to reduce the resistance and loss of the air flow inside the fan and improve the overall efficiency of the fan.

[0069] Furthermore, several mounting brackets 4 are provided on the outer side of the end plate 02.

[0070] The provision of the mounting brackets 4 makes the installation process of the fan more convenient. By connecting these mounting brackets 4 to the wall, floor or other fixed structures, the fan can be quickly and stably fixed in the required position. This not only saves installation time but also reduces the installation difficulty, enabling the fan to be put into use faster.

[0071] The mounting brackets 4 provide additional support and fixation for the fan, thereby enhancing its stability during operation. This helps to reduce the shaking or displacement of the fan caused by vibration or external factors, improving the safety and reliability of the fan.

[0072] The technical principle of the present utility model has been described in conjunction with specific embodiments above. These descriptions are only for explaining the principle of the present utility model and cannot be construed as a limitation on the protection scope of the present utility model in any way. Based on the explanations herein, those skilled in the art can readily conceive of other specific embodiments of the present utility model without creative efforts, and these embodiments will fall within the protection scope of the present utility model.

Claims

1. A low-static-pressure and low-noise cabinet fan, characterized in that: It includes a housing and a centrifugal fan; At opposite ends of the housing, an air inlet and an air outlet are respectively provided. A partition plate is arranged in the inner cavity of the housing, and the partition plate divides the inner cavity into an air inlet cavity and a noise reduction cavity. The air inlet cavity is communicated with the air inlet, and the noise reduction cavity is communicated with the air outlet; The centrifugal fan is installed in the air inlet cavity. The partition plate is provided with a communication port, and the exhaust port of the centrifugal fan is communicated with the noise reduction cavity through the communication port; The noise reduction cavity is provided with a noise reduction component.

2. The cabinet fan with low static pressure and low noise according to claim 1, characterized in that: The noise reduction component includes a wind guide and sound-absorbing cotton; The wind guide is installed on the partition plate, and the wind guide is used to diverge the air flow from the centrifugal fan to the noise reduction cavity; The sound-absorbing cotton is installed on the inner wall of the housing, and the sound-absorbing cotton is wrapped around the outer periphery of the wind guide.

3. The cabinet fan with low static pressure and low noise according to claim 2, wherein: The wind guide is in a frustum structure and is formed by enclosing a plurality of wind guide plates and connecting plates. The wind guide plates are provided with a plurality of air-dispersing holes.

4. The cabinet fan with low static pressure and low noise according to claim 3, characterized in that: The wind guide plates are flat plates in an isosceles trapezoid shape. The upper base of the wind guide plate is connected to the connecting plate, and the lower base of the wind guide plate is connected to the partition plate.

5. A low-static-pressure and low-noise cabinet fan according to any one of claims 2-4, characterized in that: One end face of the sound-absorbing cotton is connected to the inner side of the housing, and the other end face of the sound-absorbing cotton is in a concave-convex structure.

6. The cabinet fan with low static pressure and low noise according to claim 5, characterized in that: The aperture of the micropores of the sound-absorbing cotton is less than 0.5 mm.

7. The cabinet fan with low static pressure and low noise according to claim 6, characterized in that: The air inlet cavity is further provided with an air distribution plate, and the air distribution plate is arranged between the centrifugal fan and the air inlet. The air distribution plate is provided with a plurality of air distribution holes arranged in an array.

8. The cabinet fan with low static pressure and low noise according to claim 7, characterized in that: The housing includes a square shell and two end plates, and the two end plates are detachably installed at the two open ends of the shell; The air inlet is arranged on one of the end plates, and the air outlet is arranged on the other end plate.

9. The cabinet fan with low static pressure and low noise according to claim 8, characterized in that: A plurality of mounting brackets are arranged on the outer side of the end plate.

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