Noise suppression device for cooling fan of case of ruggedized computer

Abstract

The invention relates to the technical field of noise suppression of cooling fans in ruggedized computers, in particular to a noise suppression device for a cooling fan of a case of a ruggedized computer. An air inlet fluid pipeline of the air inlet noise reduction and rectification component is communicated with a fan fluid pipeline of the cooling fan; the air outlet end of the cooling fan is fixed to the air inlet end of the air outlet noise reduction and rectification component in a butt joint mode, and a fan fluid pipeline of the cooling fan communicates with an air outlet fluid pipeline of the air outlet noise reduction and rectification component. And the inner wall of the air inlet fluid pipeline and the inner wall of the air outlet fluid pipeline are used for absorbing aerodynamic noise and / or fan blade passing frequency noise. The fan noise can be optimized in a limited space in a structural mode.

Description

Technical Field

[0001] The present application relates to the technical field of noise suppression for a heat dissipation fan inside a reinforced computer, and in particular to a noise suppression device for a heat dissipation fan inside a reinforced computer chassis. Background Art

[0002] A ruggedized computer is a special computer designed to adapt to harsh environments. The main heat dissipation method for ruggedized computers is currently forced air cooling. With the development of hardware technology, the computing power of ruggedized computers continues to increase, and the heat consumption of chips continues to increase. This means that in a limited space, more heat needs to be processed, which requires more fans or a higher speed to provide a larger air volume. However, as the number of fans increases and the fan speed increases, the overall noise of the ruggedized computer also increases. However, ruggedized computers are generally used in closed rooms where people operate them. The increase in noise will cause great inconvenience to the operators, and the cooling fans currently used in the market usually do not have a noise suppression structure. Therefore, the noise problem of ruggedized computers needs to be solved urgently.

[0003] Noise within a computer chassis is generally a combination of aerodynamic noise caused by air turbulence near the fan inlet and outlet, and fan blade pass-frequency noise. Both noise levels are related to the fan and fan housing structure. Existing noise suppression devices for ruggedized computers often target fan aerodynamic noise, while ignoring the combined effects of aerodynamic noise and blade pass-frequency noise. Furthermore, as the integration level of ruggedized computers continues to increase, the space within the chassis is becoming increasingly limited.

[0004] Therefore, how to optimize fan noise through structural means within a limited space is a technical problem that technicians in this field urgently need to solve. Summary of the Invention

[0005] The present application provides a device for suppressing noise of a heat dissipation fan of a reinforced computer chassis, so as to optimize fan noise through a structural manner within a limited space.

[0006] To solve the above technical problems, this application provides the following technical solutions:

[0007] A reinforced computer case cooling fan noise suppression device comprises: an air inlet noise reduction rectification component, a cooling fan and an air outlet noise reduction rectification component; the air outlet end of the air inlet noise reduction rectification component is fixedly docked with the air inlet end of the cooling fan, and the air inlet fluid duct of the air inlet noise reduction rectification component is connected with the fan fluid duct of the cooling fan; the air outlet end of the cooling fan is fixedly docked with the air inlet end of the air outlet noise reduction rectification component, and the fan fluid duct of the cooling fan is connected with the air outlet fluid duct of the air outlet noise reduction rectification component; wherein the inner wall of the air inlet fluid duct and the inner wall of the air outlet fluid duct are used to absorb aerodynamic noise and / or fan blade passing frequency noise.

[0008] As described above, in the reinforced computer chassis cooling fan noise suppression device, preferably, the outer dimensions of the air inlet noise reduction and rectification component are larger than the outer dimensions of the cooling fan, and the outer dimensions of the air outlet noise reduction and rectification component are larger than the outer dimensions of the cooling fan.

[0009] As described above, in the reinforced computer chassis cooling fan noise suppression device, preferably, the inner diameter of the air inlet fluid duct is the same as the inner diameter of the fan fluid duct, and the inner diameter of the air outlet fluid duct is the same as the inner diameter of the fan fluid duct.

[0010] The reinforced computer case cooling fan noise suppression device as described above, wherein preferably, the air inlet noise reduction and rectification component includes: an air inlet shell, an air inlet microporous plate, an air inlet polyurethane sound-permeable membrane and sound-absorbing cotton; wherein, an air inlet fluid duct is formed in the middle of the air inlet shell, which passes through the air inlet end and the air outlet end of the air inlet noise reduction and rectification component; the air inlet microporous plate is fixed to the inner wall of the air inlet fluid duct, the sound-absorbing cotton is arranged between the air inlet microporous plate and the inner wall of the air inlet fluid duct, and the air inlet polyurethane sound-permeable membrane is attached to the side of the air inlet microporous plate facing the central axis of the air inlet fluid duct.

[0011] As described above, the reinforced computer chassis cooling fan noise suppression device, wherein preferably, an air inlet fluid duct running through the air inlet end and the air outlet end is formed in the middle of the air inlet shell, and the inner wall of the air inlet fluid duct has an outwardly concave air inlet noise reduction groove; the air inlet microporous plate closes the opening of the air inlet noise reduction groove to form an air inlet noise reduction cavity, and the sound-absorbing cotton is arranged in the air inlet noise reduction cavity.

[0012] As described above, in the reinforced computer chassis cooling fan noise suppression device, preferably, the air inlet fluid duct is cylindrical, the air inlet noise reduction cavity formed on the inner wall of the air inlet fluid duct is annular, and the air inlet microporous plate is annular.

[0013] As described above, the reinforced computer case cooling fan noise suppression device, wherein, preferably, an air inlet bell-shaped rectifying structure is provided at the center position of the air inlet fluid duct; the small end of the air inlet bell-shaped rectifying structure faces the air inlet end of the air inlet shell, and the large end of the air inlet bell-shaped rectifying structure faces the air outlet end of the air inlet shell; and the portion of the inner wall of the air inlet fluid duct close to the air inlet is a tapered arc surface with an inner diameter gradually decreasing along the gas flow direction.

[0014] As described above, the reinforced computer chassis cooling fan noise suppression device, wherein preferably, the air outlet noise reduction and rectification component includes: an air outlet shell, an air outlet microporous plate, an air outlet polyurethane sound-permeable membrane and an ant nest cavity structure; wherein, an air outlet fluid duct is formed in the middle of the air outlet shell and passes through the air inlet end and the air outlet end of the air outlet noise reduction and rectification component; the air outlet microporous plate is fixed to the inner wall of the air outlet fluid duct, the ant nest cavity structure is arranged between the air outlet microporous plate and the inner wall of the air outlet fluid duct, and the air outlet polyurethane sound-permeable membrane is attached to the side of the air outlet microporous plate facing the central axis of the air outlet fluid duct.

[0015] As described above, the reinforced computer chassis cooling fan noise suppression device, wherein preferably, the inner wall of the air outlet fluid duct has an outwardly concave air outlet noise reduction groove; the air outlet microporous plate closes the opening of the air outlet noise reduction groove to form an air outlet noise reduction cavity, and the ant nest cavity structure is arranged in the air outlet noise reduction cavity.

[0016] As described above, in the reinforced computer chassis cooling fan noise suppression device, preferably, the air outlet fluid duct is cylindrical, the air outlet noise reduction cavity formed on the inner wall of the air outlet fluid duct is annular, and the air outlet microporous plate is annular.

[0017] As described above, the reinforced computer case cooling fan noise suppression device, wherein, preferably, an air outlet bell-shaped rectifying structure is provided at the center position of the air outlet fluid duct; the small end of the air outlet bell-shaped rectifying structure faces the air outlet end of the air outlet shell, and the large end of the air outlet bell-shaped rectifying structure faces the air inlet end of the air outlet shell; and the portion of the inner wall of the air outlet fluid duct close to the air outlet is a gradually expanding arc surface with an inner diameter gradually expanding along the gas flow direction.

[0018] As described above, the reinforced computer chassis cooling fan noise suppression device, wherein, preferably, the inner wall of the air inlet microporous plate is flush with the inner wall of the air inlet fluid duct, or the inner wall of the air inlet polyurethane sound-permeable membrane is flush with the inner wall of the air inlet fluid duct; the inner wall of the air outlet microporous plate is flush with the inner wall of the air outlet fluid duct, or the inner wall of the air outlet polyurethane sound-permeable membrane is flush with the inner wall of the air inlet fluid duct.

[0019] A reinforced computer case cooling fan noise suppression device is used to suppress the noise of the cooling fan, comprising: an air inlet noise reduction rectification component and an air outlet noise reduction rectification component; the air outlet end of the air inlet noise reduction rectification component is used to dock and fix with the air inlet end of the cooling fan, and the air inlet fluid duct of the air inlet noise reduction rectification component is connected with the fan fluid duct of the cooling fan; the air inlet end of the air outlet noise reduction rectification component is used to dock and fix with the air outlet end of the cooling fan, and the air outlet fluid duct of the air outlet noise reduction rectification component is connected with the fan fluid duct of the cooling fan; wherein the inner wall of the air inlet fluid duct and the inner wall of the air outlet fluid duct are used to absorb aerodynamic noise and / or fan blade passing frequency noise.

[0020] Compared with the above-mentioned background technology, the reinforced computer case cooling fan noise suppression device provided in this application is respectively provided with an air inlet noise reduction and rectification structure and an air outlet noise reduction and rectification structure to target the aerodynamic noise and blade passing frequency noise caused by the cooling fan, thereby having a good suppressing effect on the noise caused by the fan, rectifying the air flow flowing through the reinforced computer case cooling fan noise suppression device, reducing the vortex in the flow channel, and thus increasing the wind speed at the air outlet.

[0021] Moreover, the reinforced computer case cooling fan noise suppression device of the present application has a simple and compact structure and is easy to implement, thereby reducing the cost of the reinforced computer case noise suppression work, improving the reinforced computer case noise and heat dissipation performance, and thus improving the reliability and operability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0023] Figure 1 This is a three-dimensional diagram of a device for suppressing noise from a heat dissipation fan in a reinforced computer chassis provided in an embodiment of the present application;

[0024] Figure 2 This is a front view of a device for suppressing noise from a reinforced computer chassis cooling fan provided in an embodiment of the present application;

[0025] Figure 3 is a cross-sectional view of an air inlet noise reduction and rectification component provided in an embodiment of the present application;

[0026] Figure 4 yes Figure 3 A magnified view of part A in FIG;

[0027] Figure 5 is a cross-sectional view of an outlet noise reduction and rectification component provided in an embodiment of the present application;

[0028] Figure 6 yes Figure 5 A magnified view of part B in FIG;

[0029] Figure 7 Schematic diagram of the air inlet microporous plate and the air outlet microporous plate provided in the embodiment of the present application. DETAILED DESCRIPTION

[0030] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0031] like Figure 1 and Figure 2 As shown, the present application provides a reinforced computer chassis cooling fan noise suppression device, including: an air inlet noise reduction rectification component 110, a cooling fan 120 and an air outlet noise reduction rectification component 130, or including: an air inlet noise reduction rectification component 110 and an air outlet noise reduction rectification component 130.

[0032] The outlet end of the air inlet noise reduction rectifying component 110 is fixedly docked with the air inlet end of the cooling fan 120, and the air inlet fluid duct of the air inlet noise reduction rectifying component 110 is connected with the fan fluid duct of the cooling fan 120, the air outlet end of the cooling fan 120 is fixedly docked with the air inlet end of the air outlet noise reduction rectifying component 130, and the fan fluid duct of the cooling fan 120 is connected with the outlet fluid duct of the air outlet noise reduction rectifying component 130, so that the air inlet noise reduction rectifying component 110, the cooling fan 120 and the outlet noise reduction rectifying component 130 are sequentially assembled into a whole and installed inside the reinforced computer chassis; wherein, the inner wall of the air inlet fluid duct of the air inlet noise reduction rectifying component 110 and the inner wall of the air outlet fluid duct of the air outlet noise reduction rectifying component 130 are used to absorb aerodynamic noise and / or fan blade passing frequency noise.

[0033] Optionally, the outlet end of the air inlet noise reduction and rectification component 110 is fixedly connected to the air inlet end of the cooling fan 120 via bolts and nuts; and the outlet end of the cooling fan 120 is fixedly connected to the air inlet end of the air outlet noise reduction and rectification component 130 via bolts and nuts. Furthermore, the outlet end of the air outlet noise reduction and rectification component 130 is fixedly connected to the chassis or outer panel of the housing, also via bolts and nuts. Furthermore, the parameters of the cooling fan 120 in the reinforced computer chassis cooling fan noise suppression device can be determined based on the heat dissipation requirements of the reinforced computer chassis.

[0034] In addition, the outer dimensions of the air inlet noise reduction rectification component 110 are slightly larger than the outer dimensions of the cooling fan 120, and the outer dimensions of the air outlet noise reduction rectification component 130 are also slightly larger than the outer dimensions of the cooling fan 120, so that the outer portions of the air inlet noise reduction rectification component 110 and the air outlet noise reduction rectification component 130 can wrap and fix the cooling fan 120 as a whole, making the cooling fan 120 more stable and avoiding aerodynamic noise due to the poor stability of the cooling fan 120. The "outer dimensions" referred to here are the dimensions perpendicular to the direction of air flow through the cooling fan 120, rather than the dimensions along the direction of air flow, that is, the non-length direction. Optionally, the outer dimensions of the air inlet noise reduction rectification component 110 are the same as the outer dimensions of the air outlet noise reduction rectification component 130.

[0035] In addition, the inner diameter of the air inlet fluid duct of the air inlet noise reduction rectification component 110 is the same as the inner diameter of the fan fluid duct of the cooling fan 120, and the inner diameter of the air outlet fluid duct of the air outlet noise reduction rectification component 130 is also the same as the inner diameter of the fan fluid duct of the cooling fan 120, which is conducive to the stable flow of air and avoids the generation of aerodynamic noise.

[0036] In addition, the length of the air inlet noise reduction straightening component 110 can be determined based on the wind speed flowing through the air inlet fluid duct and the internal space of the chassis. The greater the wind speed, the longer the air inlet noise reduction straightening component 110. For example, when the wind speed is 4m / s, the length of the air inlet noise reduction straightening component 110 is 50mm; when the wind speed is 6m / s, the length of the air inlet noise reduction straightening component 110 is 70mm. The length of the air outlet noise reduction straightening component 130 can be determined based on the fan blade passing frequency of the cooling fan 120 and the internal space of the chassis. The lower the fan blade passing frequency, the longer the air outlet noise reduction straightening component 130. For example, when the fan blade passing frequency is 600Hz, the length of the air outlet noise reduction straightening component 130 is 70mm; when the fan blade passing frequency is 500Hz, the length of the air outlet noise reduction straightening component 130 is 85mm. Optionally, the length of the air inlet noise reduction and rectification component 110 is smaller than the length of the air outlet noise reduction and rectification component 130 .

[0037] On the basis of the above, if Figure 3 and Figure 4 As shown, the air inlet noise reduction and rectification component 110 includes: an air inlet shell 111, an air inlet microporous plate 112, an air inlet polyurethane sound-permeable membrane 113 and sound-absorbing cotton 114; wherein, an air inlet fluid duct running through the air inlet end and the air outlet end is formed in the middle of the air inlet shell 111; the air inlet microporous plate 112 is fixed to the inner wall of the air inlet fluid duct, the sound-absorbing cotton 114 is arranged between the air inlet microporous plate 112 and the inner wall of the air inlet fluid duct, and the air inlet polyurethane sound-permeable membrane 113 is attached to the side of the air inlet microporous plate 112 facing the central axis of the air inlet fluid duct.

[0038] In addition, the inner wall of the air inlet fluid duct may also have an outward-concave air inlet noise reduction groove, where "outside" refers to the direction away from the central axis of the air inlet fluid duct; the air inlet microporous plate 112 closes the opening of the air inlet noise reduction groove, thereby forming an air inlet noise reduction cavity, and the sound-absorbing cotton 114 is arranged in the air inlet noise reduction cavity, and the air inlet polyurethane sound-transmitting membrane 113 is attached to the side of the air inlet microporous plate 112 facing the central axis of the air inlet fluid duct.

[0039] When air flows through the air inlet fluid duct of the air inlet noise reduction fairing component 110, the aerodynamic noise will enter the sound-absorbing cotton 114 through the tiny holes on the air inlet microporous plate 112 and be repeatedly refracted in the sound-absorbing cotton 114, thereby losing energy and reducing the overflow aerodynamic noise.

[0040] Optionally, the edge of the air inlet microporous plate 112 is fixed to the inner wall of the air inlet fluid duct, while the middle part of the air inlet microporous plate 112 is not connected to the inside of the air inlet fluid duct, so as to facilitate the arrangement of the sound-absorbing cotton 114 between the air inlet microporous plate 112 and the inner wall of the air inlet fluid duct. Optionally, the air inlet fluid duct is cylindrical, and the air inlet noise reduction cavity formed on the inner wall of the air inlet fluid duct is annular, so that noise can be reduced in all directions 360°, thereby improving the noise reduction effect. Optionally, the inner wall of the air inlet microporous plate 112 is flush with the inner wall of the air inlet fluid duct, or the inner wall of the air inlet polyurethane sound-permeable membrane 113 is flush with the inner wall of the air inlet fluid duct, which is conducive to the stable flow of air and avoids the generation of aerodynamic noise. Optionally, as Figure 7 As shown, the air inlet microporous plate 112 is annular. Alternatively, the openings on the air inlet microporous plate 112 are generally 1 mm to 3 mm in diameter, and the hole density is generally 4 to 20 per square centimeter.

[0041] In addition, an air inlet bell-shaped rectifying structure 115 is disposed at the center of the air inlet fluid duct; the small end of the air inlet bell-shaped rectifying structure 115 faces the air inlet end of the air inlet housing 111, and the large end of the air inlet bell-shaped rectifying structure 115 faces the air outlet end of the air inlet housing 111. Furthermore, the portion of the inner wall of the air inlet fluid duct near the air inlet is a tapered arc-shaped surface, the inner diameter of which gradually decreases along the direction of gas flow. The tapered arc-shaped surface of the inner wall of the air inlet fluid duct near the air inlet and the air inlet bell-shaped rectifying structure 115 located at the center of the air inlet fluid duct rectify the air flowing through the air inlet fluid duct, thereby reducing air vortices within the air inlet fluid duct and lowering aerodynamic noise at the air inlet.

[0042] The outer surface of the air inlet bell-shaped rectifying structure 115 gradually expands outward from its small end to its large end, that is, the outer surface of the air inlet bell-shaped rectifying structure 115 gradually expands outward along the air flow direction, thereby forming the air inlet bell-shaped rectifying structure 115. In addition, the inner wall of the air inlet fluid duct near the air inlet gradually shrinks inward from the direction close to the air inlet to the direction away from the air inlet, that is, the inner diameter of the inner wall of the air inlet fluid duct near the air inlet gradually shrinks inward along the air flow direction, thereby forming a tapered arc surface.

[0043] Optionally, the large end of the air inlet bell-shaped rectifying structure 115 is fixed to the middle of the air inlet end of the cooling fan 120. For example, the large end of the air inlet bell-shaped rectifying structure 115 is fixed to the middle of the fan blades of the cooling fan 120, and is arranged coaxially with each fan blade. This avoids the need to arrange a bracket supporting the air inlet bell-shaped rectifying structure 115 in the air inlet fluid duct, facilitates air flow in the air inlet fluid duct, and avoids the generation of aerodynamic noise.

[0044] On the basis of the above, if Figure 5 and Figure 6 As shown, the air outlet noise reduction and rectification component 130 includes: an air outlet shell 131, an air outlet microporous plate 132, an air outlet polyurethane sound-permeable membrane 133 and an ant nest cavity structure 134; wherein, an air outlet fluid duct running through its air inlet end and air outlet end is formed in the middle of the air outlet shell 131; the air outlet microporous plate 132 is fixed to the inner wall of the air outlet fluid duct, the ant nest cavity structure 134 is arranged between the air outlet microporous plate 132 and the inner wall of the air outlet fluid duct, and the air outlet polyurethane sound-permeable membrane 133 is attached to the side of the air outlet microporous plate 132 facing the central axis of the air outlet fluid duct.

[0045] In addition, the inner wall of the air outlet fluid duct may also have an outward-concave air outlet noise reduction groove, where "outside" refers to the direction away from the central axis of the air outlet fluid duct; the air outlet microporous plate 132 closes the opening of the air outlet noise reduction groove, thereby forming an air outlet noise reduction cavity, and the ant nest cavity structure 134 is arranged in the air outlet noise reduction cavity, and the air outlet polyurethane sound-transmitting membrane 133 is attached to the side of the air outlet microporous plate 132 facing the central axis of the air outlet fluid duct.

[0046] When air flows through the outlet fluid duct of the outlet noise reduction fairing component 130, the aerodynamic noise and blade passing frequency noise will enter the ant nest cavity structure 134 through the tiny holes on the outlet microporous plate 132 and be repeatedly refracted in the ant nest cavity structure, thereby losing energy and reducing the overflow noise.

[0047] Optionally, the edge of the air outlet microporous plate 132 is fixed to the inner wall of the air outlet fluid duct, while the middle part of the air outlet microporous plate 132 is not connected to the inside of the air outlet fluid duct, so as to facilitate the arrangement of the ant nest cavity structure 134 between the air outlet microporous plate 132 and the inner wall of the air outlet fluid duct. Optionally, the air outlet fluid duct is cylindrical, and the air outlet noise reduction cavity formed on the inner wall of the air outlet fluid duct is annular, so that noise reduction can be performed in all directions 360°, thereby improving the noise reduction effect. Optionally, the inner wall of the air outlet microporous plate 132 is flush with the inner wall of the air outlet fluid duct, or the inner wall of the air outlet polyurethane sound-permeable membrane 133 is flush with the inner wall of the air inlet fluid duct, which is conducive to the stable flow of air and avoids the generation of aerodynamic noise. Optionally, as Figure 7 As shown, the outlet microporous plate 132 is annular. Optionally, the openings on the outlet microporous plate 132 typically have a diameter of 1 mm to 3 mm, with a density of 4 to 20 per square centimeter. Alternatively, the ant nest cavity structure 134 may have multiple irregular cavities within it, all of which are interconnected to facilitate the repeated refraction of different types of noise (aerodynamic noise and blade pass frequency noise).

[0048] In addition, a bell-shaped rectifier structure 135 is located at the center of the outlet fluid duct. The small end of the bell-shaped rectifier structure 135 faces the outlet end of the outlet housing 131, while the large end faces the inlet end of the outlet housing 131. Furthermore, the inner wall of the outlet fluid duct, near the outlet, is shaped like a gradually expanding arc, with the inner diameter gradually expanding along the direction of gas flow. The bell-shaped rectifier structure 135 at the center of the outlet fluid duct rectifies the air flowing through the outlet fluid duct, thereby reducing air vortices within the outlet fluid duct, lowering aerodynamic noise at the outlet, and increasing air velocity at the outlet.

[0049] The outer surface of the bell-shaped rectification structure 135 gradually contracts from its large end to its small end, that is, the outer surface of the bell-shaped rectification structure 135 gradually contracts along the air flow direction, thereby forming the bell-shaped rectification structure 135. Furthermore, the inner wall of the outlet fluid duct, near the air outlet, gradually expands outward from a direction away from the air outlet to a direction closer to the air inlet, that is, the inner diameter of the inner wall of the outlet fluid duct, near the air outlet, gradually increases outward along the air flow direction, thereby forming a gradually expanding arc-shaped surface.

[0050] Optionally, the large end of the bell-shaped airflow structure 135 is fixed to the middle of the air outlet end of the cooling fan 120. For example, the large end of the bell-shaped airflow structure 135 is fixed to the middle of the fan blades of the cooling fan 120, and is coaxial with each fan blade. This avoids the need to place a bracket supporting the bell-shaped airflow structure 135 within the outlet fluid duct, facilitates air flow within the outlet fluid duct, and avoids the generation of aerodynamic noise.

[0051] The cooling fan in a reinforced computer case generates aerodynamic noise and blade-passing frequency noise. This application addresses these two noise types by providing an inlet noise reduction and rectification structure and an outlet noise reduction and rectification structure, respectively. This effectively suppresses fan-induced noise. This device rectifies the airflow through the reinforced computer case cooling fan noise suppression device, reducing eddy currents within the flow path and thereby increasing the air velocity at the outlet. Furthermore, the reinforced computer case cooling fan noise suppression device of this application has a simple, compact structure and is easy to implement, thereby reducing the cost of noise suppression in the reinforced computer case and improving the noise and heat dissipation performance of the reinforced computer case, thereby enhancing the reliability and operability of the system.

[0052] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0053] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A device for suppressing noise of a cooling fan of a reinforced computer chassis, characterized in that: include: Air inlet noise reduction and rectification components, cooling fans and air outlet noise reduction and rectification components; The air outlet end of the air inlet noise reduction and rectification component is fixedly docked with the air inlet end of the heat dissipation fan, and the air inlet fluid duct of the air inlet noise reduction and rectification component is connected with the fan fluid duct of the heat dissipation fan; The air outlet end of the heat dissipation fan is fixedly docked with the air inlet end of the air outlet noise reduction rectifying component, and the fan fluid duct of the heat dissipation fan is connected with the air outlet fluid duct of the air outlet noise reduction rectifying component; Among them, the air inlet noise reduction and rectification component is used to absorb aerodynamic noise, and the air outlet noise reduction and rectification component is used to absorb aerodynamic noise and fan blade passing frequency noise.

2. The device for suppressing noise of a reinforced computer chassis cooling fan according to claim 1, characterized in that: The outer dimensions of the air inlet noise reduction and rectification component are larger than the outer dimensions of the heat dissipation fan, and the outer dimensions of the air outlet noise reduction and rectification component are larger than the outer dimensions of the heat dissipation fan.

3. The device for suppressing noise of a heat dissipation fan of a reinforced computer chassis according to claim 1, characterized in that: The inner diameter of the air inlet fluid duct is the same as the inner diameter of the fan fluid duct, and the inner diameter of the air outlet fluid duct is the same as the inner diameter of the fan fluid duct.

4. The device for suppressing noise of a heat dissipation fan of a reinforced computer chassis according to any one of claims 1 to 3, characterized in that: The air inlet noise reduction and rectification components include: air inlet shell, air inlet microporous plate, air inlet polyurethane sound-transmitting membrane and sound-absorbing cotton; Among them, an air inlet fluid duct is formed in the middle of the air inlet shell and passes through the air inlet end and the air outlet end of the air inlet noise reduction and rectification component; The air inlet microporous plate is fixed to the inner wall of the air inlet fluid pipe, the sound-absorbing cotton is arranged between the air inlet microporous plate and the inner wall of the air inlet fluid pipe, and the air inlet polyurethane sound-permeable membrane is attached to the side of the air inlet microporous plate facing the central axis of the air inlet fluid pipe.

5. The device for suppressing noise of a heat dissipation fan of a reinforced computer chassis according to claim 4, characterized in that: The inner wall of the air inlet fluid duct has an outward concave air inlet noise reduction groove; The air inlet microporous plate closes the opening of the air inlet noise reduction slot to form an air inlet noise reduction cavity, and the sound-absorbing cotton is arranged in the air inlet noise reduction cavity.

6. The device for suppressing noise of a heat dissipation fan of a reinforced computer chassis according to claim 5, characterized in that: The air inlet fluid pipe is cylindrical, the air inlet noise reduction cavity formed on the inner wall of the air inlet fluid pipe is annular, and the air inlet microporous plate is annular.

7. The device for suppressing noise of a heat dissipation fan of a reinforced computer chassis according to claim 4, characterized in that: An air inlet bell-shaped rectifying structure is provided at the center of the air inlet fluid duct; the small end of the air inlet bell-shaped rectifying structure faces the air inlet end of the air inlet housing, and the large end of the air inlet bell-shaped rectifying structure faces the air outlet end of the air inlet housing; In addition, a portion of the inner wall of the air inlet fluid duct close to the air inlet is a tapered arc surface with an inner diameter gradually decreasing along the gas flow direction.

8. The device for suppressing noise of a heat dissipation fan of a reinforced computer chassis according to claim 4, characterized in that: The air outlet noise reduction and rectification components include: air outlet housing, air outlet microporous plate, air outlet polyurethane sound-permeable membrane and ant nest cavity structure; Among them, an air outlet fluid duct is formed in the middle of the air outlet housing and passes through the air inlet end and the air outlet end of the air outlet noise reduction and rectification component; The air outlet microporous plate is fixed to the inner wall of the air outlet fluid pipe, the ant nest cavity structure is arranged between the air outlet microporous plate and the inner wall of the air outlet fluid pipe, and the air outlet polyurethane sound-transmitting membrane is attached to the side of the air outlet microporous plate facing the central axis of the air outlet fluid pipe.

9. The device for suppressing noise of a heat dissipation fan of a reinforced computer chassis according to claim 8, characterized in that: The inner wall of the air outlet fluid duct has an outward concave air outlet noise reduction groove; The air outlet microporous plate closes the opening of the air outlet noise reduction slot to form an air outlet noise reduction cavity, and the ant nest cavity structure is arranged in the air outlet noise reduction cavity.

10. The device for suppressing noise of a heat dissipation fan of a reinforced computer chassis according to claim 9, characterized in that: The air outlet fluid pipe is cylindrical, the air outlet noise reduction cavity formed on the inner wall of the air outlet fluid pipe is annular, and the air outlet microporous plate is annular.

11. The device for suppressing noise of a heat dissipation fan of a reinforced computer chassis according to claim 8, characterized in that: An air bell-shaped rectifying structure is provided at the center of the air outlet fluid duct; the small end of the air bell-shaped rectifying structure faces the air outlet end of the air outlet housing, and the large end of the air bell-shaped rectifying structure faces the air inlet end of the air outlet housing; Furthermore, a portion of the inner wall of the air outlet fluid conduit close to the air outlet is a gradually expanding arc-shaped surface whose inner diameter gradually expands along the gas flow direction.

12. The device for suppressing noise of a heat dissipation fan of a reinforced computer chassis according to claim 8, characterized in that: The inner wall of the air inlet microporous plate is flush with the inner wall of the air inlet fluid duct, or the inner wall of the air inlet polyurethane sound-permeable membrane is flush with the inner wall of the air inlet fluid duct; The inner wall of the air outlet microporous plate is flush with the inner wall of the air outlet fluid duct, or the inner wall of the air outlet polyurethane sound-permeable membrane is flush with the inner wall of the air inlet fluid duct.

13. A device for suppressing noise of a cooling fan of a reinforced computer case, for suppressing noise of the cooling fan, characterized in that: include: Air inlet noise reduction and rectification components and air outlet noise reduction and rectification components; The air outlet end of the air inlet noise reduction and rectification component is fixedly docked with the air inlet end of the heat dissipation fan, and the air inlet fluid duct of the air inlet noise reduction and rectification component is connected with the fan fluid duct of the heat dissipation fan; The air inlet end of the air outlet noise reduction and rectification component is fixedly docked with the air outlet end of the heat dissipation fan, and the air outlet fluid duct of the air outlet noise reduction and rectification component is connected with the fan fluid duct of the heat dissipation fan; Among them, the air inlet noise reduction and rectification component is used to absorb aerodynamic noise, and the air outlet noise reduction and rectification component is used to absorb aerodynamic noise and fan blade passing frequency noise.

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