Noise reduction device and heat dissipation system

Abstract

The utility model relates to a noise reduction device and a cooling system.The noise reduction device comprises a shell, a rotating frame and a noise reduction mechanism, a first air opening is formed in the shell in a penetrating mode, a containing cavity is formed in the shell, and a second air opening is formed in the position, opposite to the first air opening, of the rotating frame; the rotating frame is rotationally arranged in the containing cavity around the central axis of the second air opening; the noise reduction mechanism is arranged on the rotating frame and comprises a plurality of shutters arranged at intervals, and all the shutters are rotationally arranged on the rotating frame and located in the air opening; according to the noise reduction device, the sound level is reduced to the maximum extent while the heat dissipation efficiency of equipment is ensured, so that the overall use experience is improved.

Description

Technical Field

[0001] The present application relates to the technical field of noise reduction devices, and in particular to a noise reduction device and a heat dissipation system. Background Art

[0002] The external exhaust fan is a key component in CT (Computed Tomography) equipment that generates a significant amount of noise during normal operation. Therefore, we designed an external noise reduction mechanism that automatically adjusts the noise level and heat dissipation. This design ensures efficient heat dissipation while minimizing noise levels, enhancing the overall user experience. Utility Model Content

[0003] This application provides a noise reduction device and heat dissipation system to ensure the heat dissipation efficiency of the equipment while minimizing the sound level to enhance the overall user experience.

[0004] In a first aspect, the present application provides a noise reduction device, comprising:

[0005] A housing having a first air outlet formed therethrough, and an accommodating cavity formed inside the housing;

[0006] a rotating frame, wherein a second air outlet is formed at a position corresponding to the rotating frame and the first air outlet, and the rotating frame is rotatable around a central axis of the second air outlet and is disposed in the accommodating cavity; and

[0007] The noise reduction mechanism is arranged on the rotating frame, and the noise reduction mechanism includes a plurality of louvers arranged at intervals. Each of the louvers is rotatably arranged on the rotating frame and is located in the second air outlet.

[0008] In a possible implementation, the louvers are symmetrically divided into two groups, namely the first group and the second group. The rotation directions of the louvers in each group are the same, and the rotation directions of the louvers in the first group and the louvers in the second group are opposite.

[0009] In a possible implementation, the noise reduction mechanism also includes a first rotating component, which is arranged on the rotating frame. The first rotating component includes a first driver and a first transmission component. The input end of the first transmission component is connected to the driving end of the first driver, and the output end of the first transmission component is connected to each of the louvers.

[0010] In a possible implementation, a protection box is provided on the rotating frame, and the first rotating assembly is disposed in the protection box.

[0011] In a possible implementation, it further includes a second rotating component arranged in the accommodating cavity, and the second rotating component is used to drive the rotation of the rotating frame; the second rotating component includes a second driver and a second transmission component, the second driver is arranged on the outer shell, and the second transmission component is connected to the second driver and the rotating frame.

[0012] In a possible implementation, a guide mechanism is further included, wherein the guide mechanism includes a first guide member and a second guide member for guiding cooperation, wherein the first guide member is provided on the housing, and the second guide member is provided on the rotating frame.

[0013] In a possible implementation, the method further includes:

[0014] a temperature sensor, disposed on the housing;

[0015] a sound sensor, disposed on the housing;

[0016] The controller is arranged in the accommodating cavity. The temperature sensor and the sound sensor are both electrically connected to the controller. The controller is used to adjust the rotation angle of the louver.

[0017] In a possible implementation, a plurality of temperature sensors are provided, and the temperature sensors are evenly distributed around the circumference of the first air outlet;

[0018] And / or a plurality of sound sensors are provided, and the sound sensors are evenly distributed in the circumferential direction of the first air outlet.

[0019] In a possible implementation, a plurality of groups of mounting components are further included, and the mounting components are arranged on the housing at intervals.

[0020] In a second aspect, the present application provides a heat dissipation system, comprising a main body and a noise reduction device as described in the first aspect, wherein the noise reduction device is arranged on the main body, the main body has an exhaust port, and the first air port of the noise reduction device is connected to the exhaust port.

[0021] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0022] The noise reduction device and heat dissipation system provided in this embodiment adjust the opening angle of the second air outlet by rotating the louvers, thereby adjusting the air volume flowing through the second air outlet; the rotation of the rotating frame drives the louvers to rotate synchronously, adjusts the air outlet angle of the second air outlet, and adjusts the wind direction. The noise reduction device is used to be installed at the exhaust outlet of the heat dissipation system body. During the operation of the heat dissipation system body, when the noise is too loud, the louvers are controlled to rotate to reduce the angle between each louver and the second air outlet, thereby controlling the propagation of sound. When the angle between each louver and the second air outlet is the smallest, the louvers are assembled to block the second air outlet, and the noise reduction effect is optimal at this time. If heat dissipation is required, the louvers can be controlled to rotate slightly to open part of the second air outlet, which can not only achieve the circulation of wind but also control the propagation of sound, achieving heat dissipation while reducing the propagation of noise.

[0023] The noise reduction device provided in this embodiment ensures heat dissipation while reducing noise to the greatest extent, meeting the user's usage needs and solving the problem of high noise during heat dissipation that affects the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0025] In order to more clearly illustrate the embodiments of the present application 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, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0026] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0027] Figure 1 A three-dimensional diagram of a noise reduction device provided in an embodiment of the present application.

[0028] Figure 2 A three-dimensional diagram of the outer shell of a noise reduction device provided in an embodiment of the present application.

[0029] Figure 3 This is a three-dimensional diagram illustrating a first transmission component in a noise reduction device provided in an embodiment of the present application.

[0030] Figure 4 A noise reduction device provided in an embodiment of the present application is a three-dimensional diagram showing another direction of the first transmission component.

[0031] Figure 5 A three-dimensional diagram of a rotating frame in a noise reduction device provided in an embodiment of the present application.

[0032] Figure 6 This is a three-dimensional diagram illustrating a guide mechanism in a noise reduction device provided in an embodiment of the present application.

[0033] Description of reference numerals:

[0034] 1. Housing; 2. Rotating frame; 3. First air outlet; 4. Second air outlet; 5. Louver; 6. Rotating rod; 7. First drive;

[0035] 8. First transmission component; 81. Driving gear; 82. Driven gear; 83. Long rod; 84. Short rod;

[0036] 9. Protective box; 10. Second driver;

[0037] 11. Second transmission component; 111. Rotating gear; 112. Ring gear;

[0038] 12. Guide mechanism; 121. First guide member; 122. Second guide member;

[0039] 13. Temperature sensor; 14. Sound sensor; 15. Controller; 16. Installation components. DETAILED DESCRIPTION

[0040] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0041] The disclosure below provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, these are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0042] For ease of description, spatially relative terms may be used herein to describe the relative position or movement of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," "above," "front," "back," and the like. Such spatially relative terms are intended to include different orientations of the device in use or operation other than the orientation depicted in the figures. For example, if the device in the figures undergoes a positional flip or a change in posture or a change in motion, then these directional indications will also change accordingly. For example, an element described as "below" or "below" another element or feature will subsequently be oriented as "above" or "above" another element or feature. Thus, the example term "below" can include both above and below orientations. The device may be oriented otherwise (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein will be interpreted accordingly.

[0043] Reference Figures 1-6 The embodiment of the present application provides a noise reduction device, which includes a housing 1, a rotating frame 2, and a noise reduction mechanism. A first air outlet 3 is provided through the housing 1, and a receiving cavity is formed inside the housing 1. A second air outlet 4 is formed at a position corresponding to the rotating frame 2 and the first air outlet 3. The rotating frame 2 is rotatably disposed about the central axis of the second air outlet 4 and is disposed within the receiving cavity. The noise reduction mechanism is disposed on the rotating frame 2 and includes a plurality of spaced louvers 5, each of which is rotatably disposed on the rotating frame 2 and is located within the second air outlet 4.

[0044] The opening angle of the second air outlet 4 is adjusted by rotating the louvers 5, thereby adjusting the air volume flowing through the second air outlet 4. The rotation of the rotating frame 2 drives the louvers 5 to rotate synchronously, adjusting the air outlet angle of the second air outlet 4 and adjusting the wind direction. The noise reduction device is used to be installed at the exhaust port of the heat dissipation system body. During the operation of the heat dissipation system body, when the noise is too loud, the louvers 5 are controlled to rotate to reduce the angle between each louver 5 and the second air outlet 4, thereby controlling the propagation of sound. When the angle between each louver 5 and the second air outlet 4 is the smallest, the louvers 5 are assembled to block the second air outlet 4, and the noise reduction effect is optimal at this time. If heat dissipation is required, the louvers 5 can be controlled to rotate slightly to open part of the second air outlet 4, which can not only achieve the circulation of wind but also control the propagation of sound, achieving heat dissipation while reducing the propagation of noise.

[0045] In summary, the noise reduction device provided in this embodiment ensures heat dissipation while reducing noise to the greatest extent, meets the user's usage needs, and solves the problem of high noise during heat dissipation that affects the user experience.

[0046] In the present application, there is no restriction on the cross-sectional shape of the first air outlet 3 and the second air outlet 4, and their cross-sectional shape can be circular, rectangular, etc. Of course, the cross-sectional shapes of the first air outlet 3 and the second air outlet 4 can also be the same, or different. When the cross-sectional shapes of the first air outlet 3 and the second air outlet 4 are the same, preferably, the cross-sectional dimensions of the first air outlet 3 and the second air outlet 4 are the same and are arranged opposite each other. Of course, in order to ensure the ventilation volume, the cross-sectional dimension of the second air outlet 4 can also be larger than the cross-sectional dimension of the first air outlet 3. Similarly, when the cross-sectional dimensions of the first air outlet 3 and the second air outlet 4 are different, the cross-sectional dimension of the second air outlet 4 is larger than the first air outlet 3, and the first air outlet 3 is completely located in the second air outlet 4 to avoid affecting the air volume and affecting the heat dissipation effect.

[0047] In this embodiment, the first air outlet 3 and the second air outlet 4 are described as having the same cross-sectional size and the same cross-sectional shape, both being circular.

[0048] Correspondingly, the shapes of the louvers 5 can be completely identical, partially identical, or completely different, and can be adaptively adjusted according to the cross-sectional shape of the second air outlet 4. For example, when the cross-sectional shape of the second air outlet 4 is rectangular, the shapes of the louvers 5 can be completely identical, and they can be arranged in a rectangular shape. Multiple louvers 5 can be assembled to block the second air outlet 4. When the cross-sectional shape of the second air outlet 4 is circular, the shapes of the louvers 5 can also be completely identical, for example, they can be arranged in a rectangular shape. The rectangular shape after the multiple louvers 5 are assembled can completely cover the circular opening of the second air outlet 4. Of course, in order to save costs, the shapes of the louvers 5 can also be partially identical or completely different, so that the louvers 5 can form a circle that is compatible with the second air outlet 4 after being assembled.

[0049] In some embodiments, a rotating rod 6 is provided on the louver 5 , and both ends of the rotating rod 6 rotate in conjunction with the rotating frame 2 . The rotation of the rotating rod 6 drives the synchronous rotation of the louver 5 , thereby adjusting the ventilation volume of the second air outlet 4 .

[0050] It can be seen that when the angle between the louvers 5 and the second air outlet 4 is at its maximum, that is, 90 degrees, the louvers 5 are arranged in parallel and spaced apart, and the maximum air volume that can pass through the second air outlet 4 is reached. This state is defined as the heat dissipation state. Rotating the louvers 5 clockwise or counterclockwise from the maximum air volume state will reduce the angle between the louvers 5 and the second air outlet 4, thereby controlling sound propagation to a certain extent. When the angle between the louvers 5 and the second air outlet 4 is at its minimum, the louvers 5 are combined to block the second air outlet 4, achieving the best noise reduction effect. This state is defined as the noise reduction state.

[0051] Among them, the rotation directions of multiple louvers 5 can be exactly the same or partially the same. For example, when the rotation directions of multiple louvers 5 are exactly the same, each louver 5 can rotate clockwise at the same time in the heat dissipation state until it switches to the noise reduction state; of course, the rotation directions of multiple louvers 5 are partially the same, including the rotation directions of each louver 5 being different, that is, the rotation directions of any two adjacent louvers 5 are opposite. In addition, there can be many other situations, which are not described one by one in this embodiment.

[0052] In the present application, the louvers 5 are symmetrically divided into two groups, namely the first group and the second group. The louvers 5 in each group rotate in the same direction, while the louvers 5 in the first group and the louvers 5 in the second group rotate in opposite directions. Specifically, the louvers 5 in the first group can switch from the heat dissipation state to the noise reduction state by rotating clockwise, while the louvers 5 in the second group can switch from the heat dissipation state to the noise reduction state by rotating counterclockwise. In other words, during the process of switching the louvers 5 from the heat dissipation state to the noise reduction state, the swing ends of the louvers 5 in the first group and the swing ends of the louvers 5 in the second group can move in a direction away from each other or towards each other, wherein the swing end of the louver 5 is the end of the louver 5 away from the rotating rod 6.

[0053] The noise reduction mechanism also includes a first rotating component, which is arranged on the rotating frame 2. The first rotating component includes a first driver 7 and a first transmission component 8. The input end of the first transmission component 8 is connected to the driving end of the first driver 7, and the output end of the first transmission component 8 is connected to each of the louvers 5; the first rotating component is used to drive the synchronous rotation of multiple louvers 5, thereby realizing the switching of the louvers 5 between the noise reduction state and the heat dissipation state, or adjusting the air volume of the second air outlet 4.

[0054] Specifically, the output end of the first transmission component 8 can be connected to the multiple louvers 5 to drive the multiple louvers 5 to rotate synchronously and in the same direction. For example, the first transmission component 8 is a matching gear and rack structure. Each rotating rod 6 of each louver 5 is provided with a gear. The rack is provided at the movable end of the first driver 7. The rack is engaged with each gear. The first driver 7 can be a cylinder or an electric push rod. The reciprocating movement of the drive rack drives the rotation of each gear, thereby driving the rotation of each louver 5. Of course, the first transmission component 8 can also be a matching worm gear structure.

[0055] In the present application, the first transmission component 8 includes a meshing driving gear 81 and a driven gear 82. The driving gear 81 is connected to the louver 5 in the first group closest to the second group, and the driven gear 82 is connected to the louver 5 in the second group closest to the first group. When the driving gear 81 and the driven gear 82 are meshed with each other, the two louvers 5 rotate synchronously in opposite directions. The first driver 7 is used to drive the rotation of the driving gear 81. The first driver 7 includes a motor or a rotary cylinder and is connected to the driving gear 81. In addition, the first transmission component 8 also includes two connecting rod structures, which are respectively used to cooperate with each louver 5 in the first group and each louver 5 in the second group. Specifically, the connecting rod structure includes a long rod 83 and a plurality of short rods 84 rotatably connected to the long rod 83. The end of each short rod 84 away from the long rod 83 is connected to each louver 5. As a result, each louver 5 in each first group rotates synchronously in the same direction, and each louver 5 in each second group rotates synchronously in the same direction.

[0056] Reference Figure 5 A protection box 9 is provided on the rotating frame 2, and the first rotating component is provided in the protection box 9; the first rotating component is protected by the setting of the protection box 9 to ensure the stability of the rotation of each shutter 5.

[0057] Reference Figure 5 and Figure 6 The noise reduction device further includes a second rotating assembly disposed within the accommodating chamber, configured to drive the rotation of the rotating frame 2. The second rotating assembly includes a second driver 10 disposed on the housing 1 and a second transmission component 11, which provides a transmission connection between the second driver 10 and the rotating frame 2. To ensure the airflow through the second air outlet 4, the second transmission component 11 is disposed on the wall of the rotating frame 2.

[0058] The second transmission component 11 includes a rotating gear 111 and an annular gear 112. The second driver 10 is used to drive the rotation of the rotating gear 111. The second driver 10 includes a motor or a rotating cylinder, etc., and is connected to the rotating gear 111; the annular gear 112 is provided on the outer wall surface of the rotating frame 2, and the rotating gear 111 is meshed with the annular gear 112. Under the rotation drive of the rotating gear 111, the annular gear 112 is driven to rotate synchronously, thereby realizing the rotation of the rotating frame 2.

[0059] In order to ensure the stability of the rotation of the rotating frame 2, the noise reduction device also includes a guide mechanism 12, and the guide mechanism 12 includes a first guide member 121 and a second guide member 122 for guiding and matching. The first guide member 121 is arranged on the housing 1, and the second guide member 122 is arranged on the rotating frame 2. The first guide member 121 and the second guide member 122 can be embedded in matching guide blocks and guide grooves, or embedded in matching guide rails and guide grooves. In this application, the first guide member 121 is described as a guide rail and the second guide member 122 is described as a guide groove. The guide groove is provided on the rotating frame 2. Optionally, the rotating frame 2 is a circular frame structure, and the guide groove is provided on the outer wall surface of the rotating frame 2 or on the top wall surface of the rotating frame 2 or on the bottom wall surface of the rotating frame 2. Correspondingly, the guide rail is provided on the housing 1 for mutual embedding with the guide groove.

[0060] Reference Figures 1 to 6 The noise reduction device also includes a temperature sensor 13, a sound sensor 14, and a controller 15, wherein the temperature sensor 13 is provided on the housing 1; the sound sensor 14 is provided on the housing 1; the controller 15 is provided in the accommodating cavity, and the temperature sensor 13 and the sound sensor 14 are both electrically connected to the controller 15, and the controller 15 is used to adjust the rotation angle of the louver 5. The temperature sensor 13 is used to monitor the temperature, and the sound sensor 14 is used to monitor the noise volume. Information is collected simultaneously by the sound sensor 14 and the temperature sensor 13. When the temperature does not reach the rated requirement but the noise exceeds the rated requirement, the controller 15 controls the first rotating component to operate so that the louver 5 can cover the second air outlet 4 or reduce the air outlet volume of the second air outlet 4 after rotation to reduce the spread of noise. At this time, the second rotating component can also be used to drive the rotation of the rotating frame 2 to control the direction of the air outlet. If the temperature reaches the rated temperature but the noise level does not meet the rated requirement, controller 15 controls the rotation of louvers 5, increasing the airflow from second air outlet 4 to enhance heat dissipation. Simultaneously, rotating frame 2 can be used to change the direction of the airflow, adjusting the heat dissipation to a position with lower noise and better heat dissipation. In other words, with temperature as the primary indicator and noise as a secondary indicator, the swing angle of louvers 5 and the rotation angle of rotating frame 2 are adjusted to ensure healthy operation of the equipment.

[0061] The noise reduction device can be powered by an external power supply to supply power to its internal electrical structure. Of course, the noise reduction device can also be provided with an energy storage component to achieve self-power supply. The energy storage component includes a battery, etc.

[0062] There are multiple temperature sensors 13, and each of the temperature sensors 13 is evenly distributed around the circumference of the first air outlet 3; and / or there are multiple sound sensors 14, and each of the sound sensors 14 is evenly distributed around the circumference of the first air outlet 3. By setting up multiple temperature sensors 13, the temperature is accurately detected, so that heat dissipation control is timely performed according to the temperature detection results; and by using multiple sound sensors 14, the noise is accurately detected to ensure the heat dissipation effect while controlling the noise reduction. Exemplarily, there are two sound sensors 14, and the two sound sensors 14 are respectively located on both sides of the radial direction of the first air outlet 3, and there are two temperature sensors 13, and the two temperature sensors 13 are respectively located on both sides of the radial direction of the first air outlet 3.

[0063] The noise reduction device also includes multiple sets of mounting components 16, each of which is spaced apart on the housing 1 and is used to mount the noise reduction device on other components to achieve a noise reduction effect when the other components are working. The multiple sets of mounting components 16 also ensure the stability of the installation. The mounting components 16 include clips or screws.

[0064] In summary, the noise reduction device provided in this embodiment minimizes operating noise while ensuring heat dissipation performance, greatly improving the user experience. The swinging of multiple louvers 5 minimizes sound transmission, while also controlling the wind direction by adjusting the rotation angle of the rotating frame 2, achieving a balance between sound and temperature control.

[0065] Reference Figures 1-6 An embodiment of the present application also provides a heat dissipation system, including a main body and a noise reduction device as described above, wherein the noise reduction device is arranged on the main body, the main body has an exhaust port, and the first air port 3 of the noise reduction device is connected to the exhaust port.

[0066] The noise reduction device is used to be installed on the main body. The size of the housing 1 of the noise reduction device should be smaller than that of the main body, which can reduce costs and facilitate installation. In addition, the first air outlet 3 on the housing 1 of the noise reduction device is used to be arranged in alignment with the exhaust outlet of the main body. Therefore, the size and shape of the first air outlet 3 can be adaptively adjusted according to the size and shape of the exhaust outlet. For example, when the exhaust outlet is circular, the first air outlet 3 can be a circular structure of the same size as the exhaust outlet, or a circular structure larger than the exhaust outlet to avoid affecting the air volume of the exhaust outlet. Of course, at this time, the first air outlet 3 can also be other polygonal shapes larger than the exhaust outlet, such as a rectangular shape.

[0067] The main body can be a radiator or an exhaust fan. Of course, the main body can also be a computer case, high-voltage equipment, air conditioner indoor unit and other components.

[0068] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0069] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0070] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A noise reduction device, characterized in that: include: A housing (1) is provided with a first air outlet (3) extending therethrough, and a receiving cavity is formed inside the housing (1); A rotating frame (2), wherein a second air outlet (4) is formed at a position corresponding to the rotating frame (2) and the first air outlet (3), and the rotating frame (2) is arranged in the accommodating cavity by rotating around the central axis of the second air outlet (4); and A noise reduction mechanism is provided on the rotating frame (2), and the noise reduction mechanism comprises a plurality of louvers (5) arranged at intervals, each of the louvers (5) being rotatably provided on the rotating frame (2) and located in the second air outlet (4).

2. The noise reduction device according to claim 1, characterized in that The louvers (5) are symmetrically divided into two groups, namely the first group and the second group. The louvers (5) in each group rotate in the same direction, and the louvers (5) in the first group and the louvers (5) in the second group rotate in opposite directions.

3. The noise reduction device according to claim 1, characterized in that The noise reduction mechanism further comprises a first rotating assembly, which is arranged on the rotating frame (2). The first rotating assembly comprises a first driver (7) and a first transmission component (8), wherein the input end of the first transmission component (8) is connected to the driving end of the first driver (7), and the output end of the first transmission component (8) is connected to each of the louvers (5).

4. The noise reduction device according to claim 3, characterized in that: A protection box (9) is provided on the rotating frame (2), and the first rotating component is provided in the protection box (9).

5. The noise reduction device according to claim 1, characterized in that The invention also includes a second rotating assembly arranged in the accommodating cavity, wherein the second rotating assembly is used to drive the rotation of the rotating frame (2); the second rotating assembly includes a second driver (10) and a second transmission component (11), wherein the second driver (10) is arranged on the housing (1), and the second transmission component (11) is connected to the second driver (10) and the rotating frame (2).

6. The noise reduction device according to claim 5, characterized in that: The invention also includes a guide mechanism (12), wherein the guide mechanism (12) includes a first guide member (121) and a second guide member (122) for guiding cooperation, wherein the first guide member (121) is arranged on the housing (1), and the second guide member (122) is arranged on the rotating frame (2).

7. The noise reduction device according to claim 1, characterized in that: Also includes: a temperature sensor (13), disposed on the housing (1); a sound sensor (14), disposed on the housing (1); A controller (15) is arranged in the accommodating cavity, the temperature sensor (13) and the sound sensor (14) are both electrically connected to the controller (15), and the controller (15) is used to adjust the rotation angle of the louver (5).

8. The noise reduction device according to claim 7, characterized in that: A plurality of temperature sensors (13) are provided, and each of the temperature sensors (13) is evenly distributed in the circumferential direction of the first air outlet (3); And / or a plurality of the sound sensors (14) are provided, and the sound sensors (14) are evenly distributed in the circumferential direction of the first air outlet (3).

9. The noise reduction device according to claim 1, wherein: It also includes a plurality of groups of mounting components (16), each of the mounting components (16) being arranged on the housing (1) at intervals.

10. A heat dissipation system, characterized in that: The noise reduction device comprises a main body and the noise reduction device according to any one of claims 1 to 9, wherein the noise reduction device is arranged on the main body, the main body has an air outlet, and the first air outlet (3) of the noise reduction device is connected to the air outlet.

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