Noise reduction device and heat dissipation unit

Abstract

The application discloses a noise reduction device and a heat dissipation unit, and relates to the technical field of noise reduction. The noise reduction device comprises a shell, a fan assembly and a heat exchanger. A partition plate is arranged in the shell. The partition plate is used for separating multiple chambers in the shell, and the multiple chambers at least comprise a first chamber and a second chamber. The fan assembly is arranged in the first chamber. The heat exchanger is arranged in the second chamber. The shell is provided with a first air vent for communicating the first chamber and a second air vent for communicating the second chamber. The first chamber and the second chamber are arranged along a first direction. The partition plate is provided with a communicating port for communicating the first chamber and the second chamber. In the first direction, the cross-sectional area of the communicating port is smaller than that of any one of the first chamber and the second chamber. The noise can be effectively reduced while heat dissipation is realized, and the noise reduction effect is optimized.

Description

Technical Field

[0001] This application relates to the field of noise reduction technology, and in particular to a noise reduction device and a heat dissipation unit. Background Technology

[0002] For devices with high heat dissipation requirements, such as energy storage devices, centralized photovoltaic inverters, or other inverters, cooling units are generally required. Furthermore, as performance requirements increase, the heat dissipation needs of these devices also grow.

[0003] In related technologies, cooling units are generally used to dissipate heat for devices with high heat dissipation requirements. However, cooling units generate a lot of noise during operation, and how to effectively control or reduce noise has become a challenge for improvement. Utility Model Content

[0004] The main purpose of this application is to propose a noise reduction device and a heat dissipation unit, which aims to solve the technical problem of how to reduce noise while achieving heat dissipation.

[0005] On the one hand, a noise reduction device is provided, comprising: A housing, wherein a partition is provided inside the housing to divide the housing into multiple chambers, the multiple chambers including at least a first chamber and a second chamber; The fan assembly is located within the first chamber; The heat exchanger is located in the second chamber; The housing has a first vent for connecting the first chamber and a second vent for connecting the second chamber. The first chamber and the second chamber are arranged along a first direction. The partition is provided with a connecting port for connecting the first chamber and the second chamber. In the first direction, the cross-sectional area of ​​the connecting port is smaller than the cross-sectional area of ​​either the first chamber or the second chamber.

[0006] In one embodiment, the noise reduction device further includes a flow guiding component, the flow guiding component having a flow guiding channel, and a first air outlet and a second air outlet on both sides of the flow guiding component for connecting the flow guiding channel; The flow guiding component is disposed in the second chamber, and the heat exchanger is disposed on the side of the flow guiding component with the first air outlet. The projected area of ​​the heat exchanger in the first direction is larger than the projected area of ​​the first air outlet in the first direction.

[0007] In one embodiment, a resonant cavity is formed between the outer peripheral wall of the flow guiding component and the inner sidewall of the housing, and a through hole is provided on the flow guiding component, the through hole connecting the resonant cavity and the flow guiding channel.

[0008] In one embodiment, the airflow guiding assembly further includes a mounting plate, and the second air outlet is formed on the mounting plate; The plurality of chambers also includes a third chamber formed between the partition and the mounting plate. The third chamber is connected to the first chamber through the communication port and to the second chamber through the second air vent.

[0009] In one embodiment, the first vent is an air outlet, the second vent is an air inlet, the fan assembly is disposed near the air outlet, and the heat exchanger is disposed near the air inlet; Alternatively, the first vent is an air inlet, the second vent is an air outlet, the fan assembly is located near the air inlet, and the heat exchanger is located near the air outlet.

[0010] In one embodiment, the heat exchanger is inclined relative to the second vent.

[0011] In one embodiment, there are multiple second vents, and the heat exchanger includes a first sub-heat exchanger and a second sub-heat exchanger; The first sub-heat exchanger and the second sub-heat exchanger are arranged at an angle, with the first sub-heat exchanger located near a portion of the plurality of second vents and the second sub-heat exchanger located near the other portions of the plurality of second vents.

[0012] In one embodiment, the flow guiding assembly, the partition, and the inner wall of the housing together define the third chamber.

[0013] In one embodiment, in a first direction, the cross-sectional area of ​​the first air outlet of the air guiding component is larger than the cross-sectional area of ​​the second air outlet.

[0014] In one embodiment, the fan assembly includes a cooling fan and a rectifier ring, the rectifier ring being fitted around the outer periphery of the fan; The inner ring of the rectifier ring is provided with a noise reduction groove, which is recessed into the inner ring of the rectifier ring. And / or, the outer circumference of the rectifier ring is provided with a sound-absorbing medium.

[0015] On the other hand, a heat dissipation unit is also provided, including the noise reduction device described above.

[0016] The above-described one or more technical solutions in the embodiments of this application have at least one of the following technical effects: The fan assembly powers the airflow and improves the stability of the airflow in the duct; the heat exchanger absorbs heat. The fan assembly and heat exchanger are located in the air duct formed between the first vent and the second vent. When the airflow passes through the vent, the cross-sectional area suddenly decreases, making the vent on the partition act as a contraction section. After the airflow enters the first chamber through the first vent, it enters the second chamber through the connecting port and exits through the second vent. The second chamber acts as an expansion section connected to the vent, defining an expansion cavity between the vent and the second chamber. After the airflow enters the second chamber through the second vent, it enters the first chamber through the connecting port and exits through the first vent. The first chamber acts as an expansion section connected to the vent, defining an expansion cavity between the vent and the first chamber. The expansion cavity is used to cancel and weaken the propagating sound energy, thereby reducing noise. It is used to achieve noise reduction while heat dissipation, and effectively solves the problem of excessive noise in heat dissipation units when applied to them. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the noise reduction device of this application; Figure 2 This is a partial structural schematic diagram of an embodiment of the noise reduction device of this application; Figure 3 This is an exploded view of another embodiment of the noise reduction device of this application; Figure 4 This is one of the partial structural schematic diagrams of another embodiment of the noise reduction device of this application; Figure 5 This is a second partial structural schematic diagram of another embodiment of the noise reduction device of this application; Figure 6 This is one of the partial structural schematic diagrams of another embodiment of the noise reduction device of this application; Figure 7 This is a second partial structural schematic diagram of yet another embodiment of the noise reduction device of this application; Figure 8 This is a partial structural schematic diagram of one embodiment of the wind turbine assembly of this application; Figure 9 This is a third partial structural schematic diagram of yet another embodiment of the noise reduction device of this application; Figure 10 This is one of the schematic diagrams illustrating an embodiment of the heat exchanger of this application; Figure 11 This is a second schematic diagram of an embodiment of the heat exchanger of this application; Figure 12 This is one of the schematic diagrams illustrating another embodiment of the heat exchanger of this application; Figure 13 This is a second schematic diagram illustrating another embodiment of the heat exchanger of this application.

[0019] Explanation of icon numbers: 100. Shell; 101. First plate; 102. Second plate; 1031. First side plate; 1032. Second side plate; 1033. Third side plate; 1034. Fourth side plate; 110. First chamber; 120. Second chamber; 131. First vent; 132. Second vent; 140. Third chamber; 200. Partition; 210. Connecting port; 300. Fan assembly; 310. Cooling fan; 320. Rectifier ring; 321. Noise reduction groove; 322. Sound-absorbing medium; 330. Mounting plate; 400, Heat exchanger; 410, First sub-heat exchanger; 420, Second sub-heat exchanger; 500. Airflow guiding component; 510. Airflow guiding channel; 521. First air outlet; 522. Second air outlet; 530. Mounting plate; 600, Resonance cavity; 610, Through hole; 620, Connecting plate; 700. Installation structure.

[0020] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0022] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0023] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0024] For devices with high heat dissipation requirements, such as energy storage units, centralized photovoltaic inverters, or other inverters, cooling units are generally required. Furthermore, as performance requirements increase, the heat dissipation needs of these devices also grow. Taking energy storage converters (PCS) as an example, as an important component of energy storage systems, PCS realizes the conversion of electrical energy between energy storage batteries and the grid, and implements charge and discharge control in energy storage power stations. Energy storage converters, especially high-power ones, generate heat during operation, thus requiring heat dissipation. In related technologies, cooling units are generally used for these devices with high heat dissipation requirements. However, cooling units generate significant noise during operation, and given the proximity of power stations to residential areas, the noise from the cooling units can easily cause disturbance to residents. Therefore, reducing noise while achieving heat dissipation is becoming increasingly important.

[0025] To effectively control and reduce noise, embodiments of this application propose a noise reduction device and a heat dissipation unit. In addition to being applied to the aforementioned energy storage converters and inverters, the noise reduction device can also be applied to high-power equipment such as servo drives, transformers, generators, and motors, or power electronic equipment that requires long-term continuous operation; equipment with concentrated energy and prone to local overheating such as switch cabinets; and various other devices such as energy storage batteries; without limitation.

[0026] like Figure 1 , Figure 2 , Figure 3As shown in the embodiments of this application, the noise reduction device includes a housing 100, a fan assembly 300, and a heat exchanger 400. A partition 200 is provided inside the housing 100 to divide the housing 100 into multiple chambers. The number of chambers can be two, three, or more. The multiple chambers include at least a first chamber 110 and a second chamber 120. The fan assembly 300 is disposed in the first chamber 110, and the heat exchanger 400 is disposed in the second chamber 120.

[0027] Among them, the fan assembly 300 is used to provide power for air flow and to improve the stability of air flow; the heat exchanger 400 is used to absorb the heat generated by devices such as energy storage converters.

[0028] In the embodiments of this application, the housing 100 has a first vent 131 for connecting to the first chamber 110 and a second vent 132 for connecting to the second chamber 120. The first chamber 110 and the second chamber 120 are arranged along a first direction D1. The partition 200 is provided with a connecting port 210 for connecting the first chamber 110 and the second chamber 120. In the first direction D1, the cross-sectional area of ​​the connecting port 210 is smaller than the cross-sectional area of ​​either the first chamber 110 or the second chamber 120.

[0029] like Figure 2 , Figure 3 , Figure 4 As shown, for example, one of the first vent 131 and the second vent 132 is an air inlet (e.g., for introducing external cold air) and the other is an air outlet (e.g., for discharging heat-exchanged hot air). Whether the first vent 131 or the second vent 132 is specifically used as an air inlet or an air outlet depends on the blowing mode or exhaust mode of the fan assembly. A grille can be provided for at least one of the first vent 131 and the second vent 132. The grille can, to a certain extent, prevent debris from entering the heat exchanger 400 and other structures inside the housing. Alternatively, the grille can be replaced with a wire mesh, a filter element, or other structures that can achieve the same effect. The fan assembly and the heat exchanger are located in the air duct formed between the first vent 131 and the second vent 132, wherein the air inlet can be used to introduce cold air and the air outlet can be used to discharge hot air. When the fan assembly 300 is used to draw in cold air, it can remove more heat and achieve higher heat exchange efficiency because it operates at the cold end. When the fan assembly 300 is used to exhaust hot air, it can reduce the possible heat backflow problem and optimize the stability of heat dissipation.

[0030] In the embodiments of this application, the first direction D1 may correspond to the direction of the longer side of the bottom surface of the housing 100. A partition 200 is disposed within the housing 100 to divide the cavity within the housing 100 into at least a first chamber 110 and a second chamber 120 along the first direction D1. The first chamber 110 and the second chamber 120 are connected through a connecting port 210 formed on the partition 200. The cross-sectional area of ​​the connecting port 210 in the first direction D1 is smaller than both the cross-sectional areas of the first chamber 110 and the second chamber 120 in the first direction D1. That is, after the airflow enters the first chamber 110 through the first vent 131, it enters the second chamber 120 through the connecting port 210 and exits through the second vent 132; or, after the airflow enters the second chamber 120 through the second vent 132, it enters the first chamber 110 through the connecting port 210 and exits through the first vent 131. The relatively small cross-sectional area of ​​the vent on the partition 200 limits the airflow velocity. When the first vent 131 is an air inlet and the second vent 132 is an air outlet, the cross-sectional area of ​​the airflow suddenly decreases as it passes through the vents. This causes the vent on the partition 200 to act as a contraction section, and the second chamber 120 to act as an expansion section connected to the vent. An expansion cavity is defined between the vent and the second chamber 120. The expansion cavity increases the sound wave reflection effect through the abrupt change in cross-sectional area, and is used to cancel and weaken the propagating sound energy, thereby reducing noise. Similarly, when the second vent 132 is an air inlet and the first vent 131 is an air outlet, the cross-sectional area of ​​the airflow suddenly decreases as it passes through the vents. This causes the vent on the partition 200 to act as a contraction section, and the first chamber 110 to act as an expansion section connected to the vent. An expansion cavity is defined between the vent and the first chamber 110. The expansion cavity increases the sound wave reflection effect through the abrupt change in cross-sectional area, and is used to cancel and weaken the propagating sound energy, thereby reducing noise. In this way, noise reduction can be achieved while heat dissipation is realized, and this effectively solves the problem of excessive noise in heat dissipation units when applied to them.

[0031] In addition, depending on the actual situation, porous sound-absorbing materials can be arranged inside the expansion cavity to achieve noise reduction for broadband noise. Furthermore, the spatial proportion of the expansion cavity within the shell 100 can be increased; a larger expansion cavity and a higher expansion ratio can effectively improve the noise reduction effect in the low-frequency range. Arranging porous sound-absorbing materials in the first chamber 110 and the second chamber 120 can further improve the broadband sound absorption effect, comprehensively optimizing the noise reduction effect.

[0032] like Figure 3 , Figure 5 , Figure 6As shown, the noise reduction device also includes a flow guiding component 500, which has a flow guiding channel 510. The flow guiding component 500 has a first air vent 521 and a second air vent 522 on both sides for connecting to the flow guiding channel 510. The flow guiding component 500 is disposed in the second chamber 120. The heat exchanger 400 is disposed on the side of the heat exchanger 400 with the first air vent 521. The projected area of ​​the heat exchanger 400 in the first direction D1 is larger than the projected area of ​​the first air vent 521 in the first direction D1.

[0033] For example, the airflow guiding component 500 can be configured as an airflow shroud. The projected area of ​​the heat exchanger in the first direction D1 is larger than the projected area of ​​the first air outlet in the first direction D1, allowing the airflow to cover and pass evenly through the heat exchanger, thereby improving heat exchange efficiency. Both the heat exchanger and the airflow guiding component are located in the second chamber 120, reducing the connection structure and making the internal structure of the housing 100 more compact. By shortening the airflow path between the heat exchanger and the airflow guiding component, the process of guiding airflow and heat exchange is efficiently completed, further optimizing heat exchange efficiency. This effectively optimizes equipment performance when applied to cooling units, electrical devices, and other equipment.

[0034] like Figure 3 , Figure 6 As shown, in one embodiment, in the first direction D1, the cross-sectional area of ​​the first air outlet 521 of the airflow guiding assembly 500 is larger than the cross-sectional area of ​​the second air outlet 522. This is used to rectify and accelerate the airflow, thereby optimizing the airflow path through the heat exchanger, improving heat exchange efficiency, and optimizing operational stability.

[0035] The fan assembly 300 provides power for airflow and improves airflow stability. During operation, the fan assembly 300 generates vibration, airflow disturbance, and noise. The heat exchanger 400 absorbs heat generated by devices such as the energy storage converter and inverter. The flow guide assembly 500 is disposed in the second chamber 120 and located between the fan assembly 300 and the heat exchanger 400. The physical separation provided by the flow guide assembly 500 solves the problem of airflow disturbance directly impacting the surface of the heat exchanger 400, and to a certain extent avoids the heat exchanger 400's heat exchange efficiency being affected by unstable airflow.

[0036] like Figure 4 , Figure 5 , Figure 6As shown in the embodiments of this application, the separated and independent first chamber 110 and second chamber 120 can reduce the superposition of noise from the fan assembly 300 and the noise generated by airflow impacting the heat exchanger 400, effectively reducing the overall noise. When the fan assembly 300 is used to draw in outside cold air, the flow guiding component 500 can efficiently and evenly direct the airflow driven by the fan assembly 300 to the heat exchanger 400, improving the utilization rate of the heat exchange area and enhancing the overall heat dissipation effect of the heat dissipation unit when the noise reduction device is applied to the heat dissipation unit. When the fan assembly 300 is used to discharge the heat-exchanged air, the flow guiding component 500 can smoothly guide the air after heat exchange in the heat exchanger 400 to the fan assembly 300. By forming a uniform negative pressure distribution on the surface of the heat exchanger 400, the heat exchange area of ​​the heat exchanger 400 can be effectively utilized, improving the utilization rate of the heat exchange area. This enhances the overall heat dissipation effect of the heat dissipation unit when the noise reduction device is applied to the heat dissipation unit, and also reduces noise through smooth airflow, optimizing the overall noise reduction effect.

[0037] like Figure 4 , Figure 5 , Figure 6 As shown, further, in some embodiments, when the flow guiding assembly 500 is configured as a flow guiding shroud, the flow guiding channel 510 is gradually tapered from the first air outlet 521 to the second air outlet 522. This can be achieved by the flow guiding channel 510 gradually decreasing in area from the first air outlet 521 to the second air outlet 522; or by the flow guiding channel decreasing in a stepped manner from the first air outlet 521 to the second air outlet 522. The specific configuration can be determined based on actual conditions and is not limited here. For example, the cross-section of the flow guiding channel in the first direction D1 can be square, circular, elliptical, triangular, or any other arbitrary shape, making the overall flow guiding shroud conical or any other structure suitable for practical application. The heat exchanger 400 can be connected and fixed to the side of the flow guiding assembly 500 with the first air outlet by bolts, adhesive, welding, or other methods.

[0038] When airflow moves from the first vent 521 to the second vent 522 of the flow guide assembly 500, it can even out the airflow and reduce noise. When airflow moves from the second vent 522 to the first vent 521 of the flow guide assembly 500, the reduced channel area can accelerate the gas flow rate. The flow guide assembly 500 is used to guide and optimize the airflow pattern, while simultaneously achieving the functions of uniform flow, noise reduction, and heat exchange adaptation.

[0039] like Figure 5 , Figure 6 , Figure 7 As shown, in some embodiments, a resonant cavity 600 is formed between the outer peripheral wall of the flow guiding component 500 and the inner sidewall of the housing 100. The flow guiding component 500 is provided with a through hole 610, which connects the resonant cavity 600 and the flow guiding channel 510.

[0040] For example, a resonant cavity 600 can be defined between the outer peripheral wall of the flow guide component 500 and the inner sidewall of the housing 100 through the structural cooperation of the flow guide component 500 and the housing 100; or, at least two connecting plates 620 can be provided on the outer peripheral wall of the flow guide component, and the resonant cavity 600 can be defined by the at least two connecting plates 620 on the outer peripheral wall of the flow guide component 500 and the inner sidewall of the housing 100. The resonant cavity 600 formed between the outer peripheral wall of the flow guide component 500 and the inner sidewall of the housing 100 can absorb noise of a specific frequency. The formed resonant cavity 600 can be a Helmholtz resonant cavity, which is tuned to the main noise frequency or other noise frequency for the operation of the fan component. The sound wave of this frequency is transmitted to the flow guide channel, causing the air in the resonant cavity 600 to resonate. Through resonance, the noise can be converted into the mechanical energy, thermal energy or other energy of the air, thereby eliminating the noise of this frequency and achieving the purpose of controlling and reducing noise. This effectively solves the problem of excessive noise while achieving heat dissipation.

[0041] like Figure 5 , Figure 6 , Figure 7 As shown, in some embodiments, the housing 100 can be a cuboid, a cylinder, or any structure suitable for practical use. Taking the housing 100 as a cuboid as an example, the length of the housing 100 represents the dimension of the longer side of the bottom surface of the housing 100, and the width of the housing 100 represents the dimension of the shorter side of the bottom surface of the housing 100. The length direction and the width direction of the housing 100 are perpendicular to each other. The height of the housing 100 represents the dimension of the side perpendicular to the bottom surface of the housing 100, and the height direction of the housing 100 is perpendicular to the bottom surface of the housing 100. The first direction D1, the second direction D2, and the third direction D3 can correspond one-to-one with the length direction, width direction, and height direction of the housing 100; or they can be adjusted according to actual needs without limitation.

[0042] Combination Figure 2The shell 100 includes a shell body, a first plate 101, and a second plate 102. The first plate 101 and the second plate 102 are disposed opposite each other on both sides of the shell body along a first direction D1. The shell body, the first plate, and the second plate together enclose a cavity for accommodating at least the fan assembly 300 and the heat exchanger 400. The shell body includes a first side plate 1031, a second side plate 1032, a third side plate 1033, and a fourth side plate 1034. The first side plate 1031 and the second side plate 1032 are disposed opposite each other along a third direction D3 (height direction). One of the first side plate 1031 and the second side plate 1032 is a top plate and the other is a bottom plate. The third side plate 1033 and the fourth side plate 1034 are disposed opposite each other along a second direction D2 (width direction). The housing 100 has a first inner sidewall and a second inner sidewall. Alternatively, the two first inner sidewalls may be formed on the first side plate 1031 and the second side plate 1032, respectively, and the two second inner sidewalls may be formed on the third side plate 1033 and the fourth side plate 1034, respectively. Or, the two second inner sidewalls may be formed on the first side plate 1031 and the second side plate 1032, respectively, and the two first inner sidewalls may be formed on the third side plate 1033 and the fourth side plate 1034, respectively. No limitation is imposed here.

[0043] When the noise reduction device also includes a flow guiding component, and a resonant cavity 600 is formed between the outer peripheral wall of the flow guiding component 500 and the inner side wall of the housing 100, the following example illustrates the situation: two first side walls are respectively formed on the first side plate 1031 and the second side plate 1032, and two second side walls are respectively formed on the third side plate 1033 and the fourth side plate 1034. like Figure 6 , Figure 7 As shown, as an example, a resonant cavity 600 is provided between the outer peripheral wall of the flow guiding assembly 500 and at least one first inner side wall. The resonant cavity 600 may be located between the top surface of the flow guiding assembly 500 and the first side plate 1031; alternatively, the resonant cavity 600 may be located between the bottom surface of the flow guiding assembly 500 and the first side plate 1031.

[0044] As another example, a resonant cavity 600 is provided between the outer peripheral wall of the flow guiding assembly 500 and at least one second inner side wall. Alternatively, the resonant cavity 600 may be located between the outer peripheral wall of the flow guiding assembly 500 and the third side plate; or it may be located between the outer peripheral wall of the flow guiding assembly 500 and the fourth side plate 1034.

[0045] As another example, a resonant cavity 600 is provided between the outer peripheral wall of the flow guide assembly 500 and at least one first inner wall and at least one second inner wall.

[0046] When the housing 100 has other structures, it may also have multiple other sidewalls. By setting resonant cavities 600 with different parameters such as different chamber volumes on at least two inner sidewalls of the housing, different frequencies of noise can be matched. It can also improve the absorption efficiency of specific frequency noises such as the main noise or other noises of the fan assembly 300, thereby improving the noise reduction effect and further optimizing the noise reduction effect.

[0047] It should be noted that, depending on the location of noise sources such as the fan assembly 300, the direction of noise transmission, the structure of the flow guide assembly 500, and the internal space of the housing 100, a resonant cavity 600 can be set between the outer peripheral wall of the flow guide assembly 500 and at least one inner sidewall of the housing 100. One, two, or more resonant cavities 600 can be constructed between the flow guide assembly 500 and the same inner sidewall of the housing 100, for multi-location layout and multi-number design of resonant cavities 600, to achieve targeted absorption of noise of different frequencies and further optimize the noise reduction effect.

[0048] like Figure 8 , Figure 9 As shown, in one embodiment, the fan assembly 300 includes a cooling fan 310 and a rectifier ring 320, with the rectifier ring 320 fitted around the outer periphery of the fan. The rectifier ring 320 optimizes the airflow state to reduce irregular airflow disturbances, thereby ensuring smooth airflow to a certain extent, reducing the noise of the cooling fan 310, and further optimizing the overall noise reduction effect. The rectifier ring 320, fitted around the outer periphery of the fan assembly 300, also helps to fix the position of the fan assembly 300, reducing vibration caused by uneven airflow pressure and improving the overall operational stability of the fan assembly 300.

[0049] In addition, such as Figure 3 , Figure 8 As shown, in some embodiments, the fan assembly 300 can also be fixed inside the housing by a mounting plate 330 or the like to further reduce vibrations generated during operation.

[0050] like Figure 8 As shown, in one embodiment, a noise reduction groove 321 is provided on the inner ring of the rectifier ring 320, and the noise reduction groove 321 is recessed into the inner ring of the rectifier ring 320. The groove on the inner ring (inner side) of the rectifier ring 320 guides the airflow along a smoother path, thereby reducing the impact of the airflow on the surface of the rectifier ring 320 and the resulting noise, thus reducing the noise of the cooling fan 310 and achieving both rectification and noise reduction.

[0051] In addition to setting a groove in the inner ring of the rectifier ring, a perforated structure can also be set on the rectifier ring 320 to construct a noise reduction groove. The noise reduction groove formed by the perforated structure can absorb the noise of the cooling fan 310, thereby achieving the purpose of noise reduction.

[0052] In another embodiment, the outer circumference of the rectifier ring 320 is provided with a sound-absorbing medium 322. The sound-absorbing medium 322 can be, but is not limited to, porous sound-absorbing materials such as sound-absorbing sponge or cotton cloth, and the sound-absorbing medium 322 can achieve noise reduction.

[0053] When both noise reduction groove 321 and sound absorption medium 322 are provided, the sound absorption medium 322 can be arranged on the rectifier ring 320 corresponding to the position of the noise reduction groove 321, so as to take into account both the rectification of airflow and noise reduction effect. Through the synergy between the sound absorption medium 322 covering the rectifier ring and the noise reduction groove 321, the noise reduction effect can be enhanced and the noise control efficiency can be improved.

[0054] like Figure 5 , Figure 6 As shown, in one embodiment, the airflow guiding assembly 500 further includes a mounting plate 530, and a second air vent 522 is formed on the mounting plate 530. The plurality of chambers also includes a third chamber 140, which is formed between the partition 200 and the mounting plate 530. The third chamber 140 is connected to the first chamber 110 via a connecting port 210 and to the second chamber 120 via the second air vent 522.

[0055] Airflow enters the first chamber 110 through the first vent 131, then enters the third chamber 140 through the connecting port 210, and finally enters the second chamber 120 through the second vent 522 and exits through the second vent 132; alternatively, airflow enters the second chamber 120 through the second vent 132, enters the third chamber 140 through the second vent 522, then enters the first chamber 110 through the connecting port 210 and exits through the first vent 131. The third chamber 140 serves as a buffer zone between the first chamber 110 and the second chamber 120, thus limiting the airflow velocity. When the first vent 131 is an air inlet and the second vent 132 is an air outlet, the cross-sectional area of ​​the airflow suddenly decreases as it passes through the vents. This causes the vent on the partition 200 to act as a contraction section, and the third chamber 140 to act as an expansion section connected to the vent. The vent and the third chamber 140 together form an expansion cavity, which is used to cancel and weaken the propagating sound energy, thereby reducing noise. Similarly, when the second vent 132 is an air inlet and the first vent 131 is an air outlet, the cross-sectional area of ​​the airflow suddenly decreases as it passes through the second vent 522. This causes the second vent 522 on the mounting plate to act as a contraction section, and the third chamber 140 to act as an expansion section connected to the second vent 522. The second vent and the third chamber 140 together form an expansion cavity, which is used to cancel and weaken the propagating sound energy, thereby reducing noise. In this way, noise reduction can be achieved while heat dissipation is realized, effectively solving the problem of excessive noise in heat dissipation units when applied to them.

[0056] like Figure 5 , Figure 6 As shown, in one embodiment, the flow guiding assembly 500, the partition 200, and the inner wall of the housing 100 together define a third chamber 140.

[0057] The third chamber 140 is formed by the inner wall of the housing 100, the flow guiding components, and the partition 200. The expansion cavity is constructed in the housing 100 through the third chamber 140, which can reduce the use of additional installation structures, simplify assembly, reduce costs, and reduce the overall space occupied by the noise reduction device. As an airflow buffer between the first chamber 110 and the second chamber 120, the expansion cavity can effectively reduce flow resistance and consume noise energy through the expansion silencing principle, thereby effectively optimizing the noise reduction effect and further optimizing the equipment performance.

[0058] In one embodiment, a sound-absorbing medium (not shown) is arranged inside the expansion cavity. The sound-absorbing medium can be, but is not limited to, porous sound-absorbing materials such as sound-absorbing sponge or cotton cloth. Adding porous sound-absorbing material inside the expansion cavity can achieve noise reduction. Here, porous sound-absorbing material can be provided on at least one inner sidewall of the housing 100 corresponding to the expansion cavity, which is not limited here.

[0059] Furthermore, it should be noted that, in addition to the third chamber 140 being defined by the flow guide assembly 500, the partition 200, and the inner wall of the housing 100, in some other alternative embodiments, a mounting structure 700 surrounding the flow guide assembly 500 can be configured on the side of the flow guide assembly 500 where the second air outlet is provided. The side of the mounting structure 700 facing away from the flow guide assembly 500 is connected to the partition 200, and the third chamber 140 is defined as an expansion cavity by the mounting structure 700, the partition 200, and the flow guide assembly 500.

[0060] like Figure 4 , Figure 5 As shown, in one embodiment, the first vent 131 is an air outlet and the second vent 132 is an air inlet; the fan assembly 300 is located near the air outlet and the heat exchanger 400 is located near the air inlet.

[0061] In this way, when the fan assembly 300 is used to discharge the heat-exchanged air, the flow guiding assembly 500 is used to smoothly guide the air after heat exchange in the heat exchanger 400 to the fan assembly 300. By forming a uniform negative pressure distribution on the surface of the heat exchanger 400, the heat exchange area of ​​the heat exchanger 400 can be effectively utilized, and the heat exchange area utilization rate can be improved. This improves the overall heat dissipation effect of the heat dissipation unit when the noise reduction device is applied to the heat dissipation unit. It can also reduce noise by smoothing the airflow and optimize the overall noise reduction effect.

[0062] like Figure 6 , Figure 7As shown, in another embodiment, the first vent 131 is an air inlet and the second vent 132 is an air outlet; the fan assembly 300 is located near the air inlet and the heat exchanger 400 is located near the air outlet.

[0063] In this way, when the fan assembly 300 is used to draw in cold air from the outside, the airflow guiding assembly 500 can efficiently and evenly direct the airflow driven by the fan assembly 300 to the heat exchanger 400, thereby improving the utilization rate of the heat exchange area and enhancing the overall heat dissipation effect of the heat dissipation unit when the noise reduction device is applied to the heat dissipation unit.

[0064] like Figure 10 , Figure 11 As shown, in one embodiment, the heat exchanger 400 is inclined relative to the second vent 132.

[0065] Understandably, the heat exchange surface of the heat exchanger 400 is arranged to intersect with the plane where the second vent 132 is located. This can prolong the residence time of the airflow on the heat exchange surface, balance the local heat exchange uniformity, and improve the flexibility of equipment layout.

[0066] like Figure 5 As shown, in some other embodiments, the heat exchanger 400 is arranged facing the second vent 132; the heat exchange surface of the heat exchanger 400 is arranged parallel to the plane where the second vent 132 is located, which can improve the heat exchange efficiency of the heat exchanger 400, reduce airflow resistance, reduce energy consumption, and achieve noise reduction effect.

[0067] like Figure 12 , Figure 13 As shown, in another embodiment, there are multiple second vents 132, and the heat exchanger 400 includes a first sub-heat exchanger 410 and a second sub-heat exchanger 420. The first sub-heat exchanger 410 and the second sub-heat exchanger 420 are arranged at an angle, with the first sub-heat exchanger 410 located near a portion of the multiple second vents 132, and the second sub-heat exchanger 420 located near the other portions of the multiple second vents 132.

[0068] For example, the number of second vents 132 may be two, three, or more. The first sub-heat exchanger 410 and the second sub-heat exchanger 420 are connected as one unit. The heat exchanger 400 may also include a third heat exchanger, a fourth sub-heat exchanger, or other heat exchanger structures to adapt to a multi-vent layout and improve the heat exchange efficiency of the heat exchanger 400. The following example illustrates the situation where there are two second vents 132 arranged opposite each other on both sides of the housing 100: As an example, the side of the first sub-heat exchanger 410 away from the flow guide assembly 500 and the side of the second sub-heat exchanger 420 away from the flow guide assembly 500 are connected together. The side of the first sub-heat exchanger 410 near the flow guide assembly 500 and the side of the second sub-heat exchanger 420 near the flow guide assembly 500 are respectively connected to different positions of the flow guide assembly 500 or to different positions of the housing 100, so that the heat exchangers are connected in a V-shape, L-shape or other shape suitable for actual use.

[0069] As another example, the side of the first sub-heat exchanger 410 away from the flow guide assembly 500 and the side of the second sub-heat exchanger 420 away from the flow guide assembly 500 are positioned away from each other. The side of the first sub-heat exchanger 410 near the flow guide assembly 500 and the side of the second sub-heat exchanger 420 near the flow guide assembly 500 are connected, so that the heat exchangers are connected in a V-shape, L-shape, or any other shape suitable for practical use.

[0070] In practice, other types of heat exchangers 400 may be used, and the relative positions of the heat exchanger 400 and the second vent 132 may be set, which are not limited here.

[0071] The specific implementation method of this application is as follows: like Figure 2 , Figure 3 As shown, the noise reduction device includes a housing 100, a fan assembly 300, and a heat exchanger 400. A partition 200 is provided inside the housing 100 to divide the housing 100 into multiple chambers, which can be two, three, or more. These multiple chambers include at least a first chamber 110 and a second chamber 120. The fan assembly 300 is disposed in the first chamber 110, and the heat exchanger 400 is disposed in the second chamber 120. The housing 100 has a first vent 131 for connecting to the first chamber 110 and a second vent 132 for connecting to the second chamber 120. The first chamber 110 and the second chamber 120 are arranged along a first direction D1. The partition 200 has a connecting port 210 for connecting the first chamber 110 and the second chamber 120. Along the first direction D1, the cross-sectional area of ​​the connecting port 210 is smaller than the cross-sectional area of ​​either the first chamber 110 or the second chamber 120.

[0072] like Figure 8As shown, the fan assembly 300 further includes a cooling fan 310 and a rectifier ring 320, with the rectifier ring 320 fitted around the outer periphery of the fan. The rectifier ring 320 optimizes the airflow state, reducing irregular airflow disturbances, thereby ensuring smooth airflow to a certain extent, reducing the noise of the cooling fan 310, and further optimizing the overall noise reduction effect. The rectifier ring 320, fitted around the outer periphery of the fan assembly 300, also helps to fix the position of the fan assembly 300, reducing vibration caused by uneven airflow pressure, and improving the overall operational stability of the fan assembly 300.

[0073] To further optimize the noise reduction effect, a noise reduction groove 321 may be provided on the inner ring of the rectifier ring 320, and the noise reduction groove 321 may be recessed from the inner ring of the rectifier ring 320; a sound-absorbing medium 322 may be provided on the outer circumference of the rectifier ring 320.

[0074] like Figure 2 As shown, as an example, the housing 100 is divided into a first chamber 110 and a second chamber 120 that are interconnected by a partition 200. When airflow passes through the vent, the cross-sectional area suddenly decreases, making the vent on the partition 200 a contraction section. After airflow enters the first chamber 110 through the first vent 131, it enters the second chamber 120 through the connecting port 210 and exits through the second vent 132. The second chamber 120 then acts as an expansion section connected to the vent, defining an expansion cavity between the vent and the second chamber 120. After airflow enters the second chamber 120 through the second vent 132, it enters the first chamber 110 through the connecting port 210 and exits through the first vent 131. The first chamber 110 then acts as an expansion section connected to the vent, defining an expansion cavity between the vent and the first chamber 110. The expansion cavity is used to cancel and weaken the propagating sound energy, thereby reducing noise. This achieves noise reduction while heat dissipation, and effectively solves the problem of excessive noise in heat dissipation units when applied to heat dissipation units.

[0075] like Figure 3 , Figure 6 As shown, in another embodiment, the noise reduction device further includes a flow guiding component 500, which has a flow guiding channel 510. The flow guiding component 500 has a first air vent 521 and a second air vent 522 on both sides for connecting the flow guiding channel 510. The flow guiding component 500 is disposed in the second chamber 120, and the heat exchanger 400 is disposed on the side of the heat exchanger 400 with the first air vent 521. The projected area of ​​the heat exchanger 400 in the first direction is larger than the projected area of ​​the first air vent 521 in the first direction.

[0076] like Figure 3 , Figure 4 , Figure 5As shown, a resonant cavity 600 is formed between the outer peripheral wall of the flow guide assembly 500 and the inner sidewall of the housing 100. A through hole 610 is provided on the flow guide assembly 500, connecting the resonant cavity 600 and the flow guide channel 510. The resonant cavity 600 formed between the outer peripheral wall of the flow guide assembly 500 and the inner sidewall of the housing 100 can absorb noise of a specific frequency. The formed resonant cavity 600 can be a Helmholtz resonant cavity, which is tuned to the main noise frequency or other noise frequencies required for the operation of the wind turbine assembly.

[0077] like Figure 4 , Figure 5 , Figure 6 As shown, the airflow guiding assembly 500 is further provided with a mounting plate 530, and a second air vent 522 is formed on the mounting plate 530. The housing 100 has a third chamber 140, which is formed between the partition 200 and the mounting plate 530. The third chamber 140 is connected to the first chamber 110 through a connecting port 210 and to the second chamber 120 through the second air vent 522.

[0078] like Figure 5 , Figure 6 As shown, the flow guide assembly 500, the partition 200 and the inner wall of the housing 100 together define a third chamber 140.

[0079] like Figure 4 , Figure 5 As shown, as another example: the first vent 131 is the air outlet, and the second vent 132 is the air inlet; the fan assembly 300 is positioned near the air outlet, and the heat exchanger 400 is positioned near the air inlet. Air enters the heat exchanger 400 through the grille of the second vent 132, and then passes through the flow guide assembly 500, which can ensure a more uniform airflow into the heat exchanger 400, thereby improving heat exchange efficiency. Thus, while the fan assembly 300 is used to exhaust the heat-exchanged air, the flow guide assembly 500 is used to smoothly guide the heat-exchanged air from the heat exchanger 400 to the fan assembly 300. By forming a uniform negative pressure distribution on the surface of the heat exchanger 400, the heat exchange area of ​​the heat exchanger 400 can be effectively utilized, improving the heat exchange area utilization rate. This improves the overall heat dissipation effect of the cooling unit when the noise reduction device is applied, and also reduces noise through smooth airflow, optimizing the overall noise reduction effect. When a resonant cavity 600 is formed between the outer peripheral wall of the flow guide assembly 500 and the inner sidewall of the housing 100, discrete noise of the fan assembly 300 can be specifically eliminated. One or more resonant cavities 600 can be formed between the outer peripheral wall of the flow guide assembly 500 and at least one inner sidewall of the housing as needed.

[0080] like Figure 6 , Figure 9 , Figure 10As shown, as another example: the first vent 131 is an air inlet, and the second vent 132 is an air outlet; the fan assembly 300 is positioned near the air inlet, and the heat exchanger 400 is positioned near the air outlet, thereby achieving the purpose of blowing air onto the heat exchanger 400. Thus, when the fan assembly 300 is used to draw in outside cold air, the airflow guiding assembly 500 can efficiently and evenly direct the airflow driven by the fan assembly 300 to the heat exchanger 400, improving the utilization rate of the heat exchange area and enhancing the overall heat dissipation effect of the cooling unit when the noise reduction device is applied. When a resonant cavity 600 is formed between the outer peripheral wall of the airflow guiding assembly 500 and the inner sidewall of the housing 100, discrete fan noise can be specifically eliminated; and one or more resonant cavities 600 can be formed between the outer peripheral wall of the airflow guiding assembly 500 and at least one inner sidewall of the housing as needed.

[0081] Furthermore, such as Figure 10 , Figure 11 As shown, the heat exchanger 400 is inclined relative to the second vent 132; or, as Figure 12 , Figure 13 As shown, there are multiple second vents 132, and the heat exchanger 400 includes a first sub-heat exchanger 410 and a second sub-heat exchanger 420. The first sub-heat exchanger 410 and the second sub-heat exchanger 420 are arranged at an angle, with the first sub-heat exchanger 410 located near a portion of the multiple second vents 132, and the second sub-heat exchanger 420 located near the other portions of the multiple second vents 132.

[0082] On the other hand, this application also provides a heat dissipation unit, which includes the noise reduction device as described in the above embodiment. The heat exchanger can be, but is not limited to, a parallel flow heat exchanger or a liquid-cooled heat exchanger; when a liquid-cooled heat exchanger is used, the heat dissipation unit can be a liquid-cooled unit.

[0083] The specific structure of the noise reduction device is as described in the above embodiments. Since this heat dissipation unit adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0084] The above description is merely an exemplary embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A noise reduction device, characterized in that, include: A housing, wherein a partition is provided inside the housing to divide the housing into multiple chambers, the multiple chambers including at least a first chamber and a second chamber; The fan assembly is located within the first chamber; The heat exchanger is located in the second chamber; The housing has a first vent for connecting the first chamber and a second vent for connecting the second chamber. The first chamber and the second chamber are arranged along a first direction. The partition is provided with a connecting port for connecting the first chamber and the second chamber. In the first direction, the cross-sectional area of ​​the connecting port is smaller than the cross-sectional area of ​​either the first chamber or the second chamber.

2. The noise reduction device as described in claim 1, characterized in that, The noise reduction device further includes a flow guiding component, which has a flow guiding channel, and a first air outlet and a second air outlet on both sides of the flow guiding component for connecting the flow guiding channel. The flow guiding component is disposed in the second chamber, and the heat exchanger is disposed on the side of the flow guiding component with the first air outlet. The projected area of ​​the heat exchanger in the first direction is larger than the projected area of ​​the first air outlet in the first direction.

3. The noise reduction device as described in claim 2, characterized in that, A resonant cavity is formed between the outer peripheral wall of the flow guiding component and the inner sidewall of the housing. The flow guiding component is provided with a through hole, which connects the resonant cavity and the flow guiding channel.

4. The noise reduction device as described in claim 2, characterized in that, The airflow guiding component also includes a mounting plate, and the second air outlet is formed on the mounting plate; The plurality of chambers also includes a third chamber formed between the partition and the mounting plate. The third chamber is connected to the first chamber through the communication port and to the second chamber through the second air vent.

5. The noise reduction device as described in claim 4, characterized in that, The first vent is an air outlet, the second vent is an air inlet, the fan assembly is located near the air outlet, and the heat exchanger is located near the air inlet; Alternatively, the first vent is an air inlet, the second vent is an air outlet, the fan assembly is located near the air inlet, and the heat exchanger is located near the air outlet.

6. The noise reduction device as described in claim 5, characterized in that, The heat exchanger is inclined relative to the second vent.

7. The noise reduction device as described in claim 5, characterized in that, The number of the second vent is multiple, and the heat exchanger includes a first sub-heat exchanger and a second sub-heat exchanger; The first sub-heat exchanger and the second sub-heat exchanger are arranged at an angle, with the first sub-heat exchanger located near a portion of the plurality of second vents and the second sub-heat exchanger located near the other portions of the plurality of second vents.

8. The noise reduction device as described in any one of claims 4 to 7, characterized in that, The third chamber is defined by the flow guiding assembly, the partition, and the inner wall of the housing.

9. The noise reduction device as described in any one of claims 2 to 7, characterized in that, In the first direction, the cross-sectional area of ​​the first air outlet of the air guiding component is larger than the cross-sectional area of ​​the second air outlet.

10. The noise reduction device as described in any one of claims 1 to 7, characterized in that, The fan assembly includes a cooling fan and a rectifier ring, with the rectifier ring fitted around the outer periphery of the fan. The inner ring of the rectifier ring is provided with a noise reduction groove, which is recessed into the inner ring of the rectifier ring. And / or, the outer circumference of the rectifier ring is provided with a sound-absorbing medium.

11. A heat dissipation unit, characterized in that, Includes the noise reduction device as described in any one of claims 1 to 10.

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