Device for reducing air turbulence in fan chassis

Abstract

An apparatus and system for reducing air turbulence in a fan using a flow shaper. The fan includes an impeller, a first outlet, and a second outlet. The flow shaper includes a zoning structure disposed at an inflection point region between the first outlet and the second outlet. The flow shaper further includes a first fin for the first outlet defining a first channel between the zoning structure and the first fin. The first passage extends from a vicinity of the impeller to the first outlet.

Description

Background Art

[0001] The design of fans for personal computers, laptops, or other electronic devices has a significant impact on the user. Fan noise inside the device can impact the end-user experience and indicate an inefficient hardware design. This noise can occur in part due to high air turbulence generated at the fan outlet or at the junction where the air leaves the fan chassis and hits the heat exchanger. Unstreamlined air paths or airflow can result in noise levels of up to 50dB to 60dB in single outlet fan chassis noise, and can be even higher in dual outlet designs. Therefore, an improved method and apparatus for reducing fan chassis turbulence is desired. BRIEF DESCRIPTION OF THE DRAWINGS

[0002] Some examples of apparatus and / or methods will be described below by way of example only and with reference to the accompanying drawings, in which Figure 1 shows a schematic diagram of a fan with a flow shaper; Figure 2 shows a schematic diagram of a fan with a heat exchanger, wherein a flow shaper extends between the fan and the heat exchanger; Figure 3A A visualization of the air velocity in the baseline fan chassis is shown; Figure 3B shows a visualization of the air in a fan chassis with a flow shaper; Figure 4A shows a visualization of the noise generated by turbulence in a baseline fan chassis; Figure 4B shows a visualization of the noise generated by turbulence in a fan chassis with a flow shaper; Figure 5 shows a flow shaper integrated into the fan chassis; and Figure 6 An external view of a fan with a flow shaper is shown. DETAILED DESCRIPTION

[0003] Some examples are now described in more detail with reference to the accompanying drawings. However, other possible examples are not limited to the features of these embodiments described in detail. Other examples may include modifications of features and equivalents and substitutes of features. In addition, the terms used to describe certain examples herein should not limit other possible examples.

[0004] Throughout the description of the drawings, the same or similar reference numerals refer to the same or similar elements and / or features, which may be the same or implemented in a modified form while providing the same or similar functions. For clarity, the thickness of lines, layers and / or regions in the drawings may also be exaggerated.

[0005] When two elements A and B are combined using "or", it is understood that this discloses all possible combinations, i.e., only A, only B, and A and B, unless otherwise explicitly defined in individual cases. As an alternative wording for the same combination, "at least one of A and B" or "A and / or B" can be used. This is equally applicable to combinations of more than two elements.

[0006] If singular forms such as "a / an" and "the" are used and the use of only a single element is neither explicitly nor implicitly defined as mandatory, further examples may also use several elements to achieve the same function. If a function is described below as being implemented using multiple elements, further examples may use a single element or a single processing entity to achieve the same function. It is further understood that when the term "include", "including", "comprise" and / or "comprising" is used, it describes the presence of specified features, integers, steps, operations, elements, components and / or groups thereof, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0007] In the following description, specific details are set forth, but examples of the techniques described herein may be implemented without these specific details. Well-known circuits, structures, and techniques are not shown in detail to avoid obscuring an understanding of the present description. “An example / example,” “various examples / examples,” “some examples / examples,” and the like may include features, structures, or characteristics, but not every example necessarily includes these particular features, structures, or characteristics.

[0008] Some examples may have some or all of the features described for other examples, or none of them at all. "First," "second," "third," and the like describe common elements and indicate different instances of similar elements being referenced. Such adjectives do not imply that the elements so described must be in a given order in time or space, in ranking, or in any other way. "Connected" may indicate that elements are in direct physical or electrical contact with each other, and "coupled" may indicate that elements cooperate or interact with each other, but these elements may or may not be in direct physical or electrical contact.

[0009] As used herein, the terms "operate," "execute," or "run" are used interchangeably when referring to software or firmware associated with a system, device, platform, or resource, and may refer to software or firmware stored in one or more computer-readable storage media accessible by a system, device, platform, or resource, even if the instructions contained in the software or firmware are not being actively executed by the system, device, platform, or resource.

[0010] The specification may use the phrases "in an example / example", "in various examples", "in some examples / examples", and / or "in various examples / examples", each of which may refer to one or more of the same or different examples. In addition, the terms "comprising", "including", "having", etc. as used with respect to the examples of the present disclosure are synonymous.

[0011] Figure 1 A schematic image of a flow shaper 110 for a centrifugal fan 100 is shown. The centrifugal fan 100 may include an impeller 104, a first outlet 152 along a first direction, and a second outlet 154 along a second direction. The flow shaper 110 may include a partitioning structure 120 disposed at an inflection area 151 between the first outlet 152 and the second outlet 154. The flow shaper 110 may further include a first fin 122 for the first outlet 152, thereby defining a first channel 121 between the partitioning structure 120 and the first fin 122. The first channel 121 extends from a vicinity of the impeller 104 to the first outlet 152.

[0012] The flow shaper 110 may be a device or structure for controlling, directing, or manipulating the flow characteristics of a fluid (such as air or liquid) within a particular system or device. The flow shaper 110 may be designed to optimize fluid flow patterns, reduce turbulence, increase efficiency, or achieve desired fluid dynamics. A flow shaper 110 that affects fan exhaust, particularly when shaping airflow to a first or primary outlet, may reduce noise generated by improper dissipation of air or turbulence. Turbulence often occurs in or near the inflection point region of a fan.

[0013] The inflection point region refers to a specific point, location or region (e.g., a corner or curved segment) where an outlet transitions from a first direction to a second direction. It can be the intersection of a first and a second outlet, or a dividing point that divides one outlet into two outlets oriented in different directions. The inflection point region is an important region marking the change in flow direction and plays an important role in guiding the fluid or gas flow. In addition, the highest turbulence and resulting noise caused by the structure marking the transition from one outlet to another is often found in the inflection point region.

[0014] Adding structural additions (e.g., directional fins) at the outlet segment or outlet of the fan can streamline the airflow as it strikes other components (such as a heat exchanger). This streamlining of the flow (e.g., at the exit path from the fan chassis 108 to the heat exchanger) can help reduce noise due to reduced air turbulence. Additionally, this advantage can be added at negligible additional cost and minimal changes to the manufacturing process.

[0015] Furthermore, adding fins to the output of the fan may not increase the height (e.g., z-axis) of the fan chassis 108, nor increase the overall shape of the fan chassis 108. By streamlining the airflow, a better end-user experience may be provided. This is most evident in reducing fan noise, which may be reduced by 2dB or more.

[0016] For example, fins are thin, extended surfaces or structures attached to a fluid handling system or device, designed to affect and control the flow characteristics of fluids such as air or liquids. These fins are strategically positioned for optimizing fluid dynamics by directing, guiding, or redirecting flows with desired patterns or paths. They can cause eddies, generate turbulence, promote boundary layer control, enhance mixing, or achieve other flow manipulation targets. Fins can be used to improve efficiency, performance, or achieve specific fluid flow requirements in a wide range of applications (including heat exchangers, fans, compressors, and aerodynamic devices).

[0017] For example, partition structure 120 can be a division or separation component within a system, device, or equipment that produces different compartments, chambers, or regions. Partition structure 120 can be used to isolate, control, or regulate the flow, pressure, or characteristics of fluids in different parts of the system. Partition structure 120 can be a physical barrier, wall, or baffle that guides or redirects fluid, affects its behavior, or interacts with other components. For example, partition structure 120 can be a cutwater, wedge, or fin-shaped structure. In general, partition structure 120 is a main or dominant structure for dividing flow between two outlets at the inflection point region 151 of the fan.

[0018] Figure 1 It is further shown that the flow shaper 110 may include a second fin 124 for the first outlet 152, thereby defining a second channel 123 between the first fin 122 of the first outlet 152 and the second fin 124 of the first outlet 152. The second channel 123 may also extend from the vicinity of the impeller 104 to the first outlet 152.

[0019] For example, a channel is a specific path or passageway through which a fluid flows or is directed within a system or device. The first channel 121 may have a defined shape, configuration, or purpose to direct the fluid in a specific direction or promote desired fluid flow characteristics. Adding two or more channels to the flow shaper 110 may enhance fluid distribution and reduce fan noise.

[0020] Additional fins (e.g., second fin 124) are additional thin, extended surfaces or structures attached to a fluid handling system or device that perform a similar function to the first fin 122. They can be strategically positioned to further influence and control the flow characteristics of a fluid such as air or liquid within the system. The second fin 124 works in conjunction with other fins or flow shaping components to optimize fluid dynamics, enhance heat transfer, promote fluid mixing, or achieve other desired flow manipulation goals. The second fin 124 and any additional fins can have a specific shape, configuration, or orientation that is customized according to the specific requirements of the system or application in which it is utilized.

[0021] The first outlet 152 may be a specific opening, duct, or passage through which a fluid, such as air or liquid, flows or is exhausted from a system, device, or apparatus (e.g., a fan). The first outlet 152 may be designated for a specific purpose, location, or function, and may be associated with specific flow control or directional features.

[0022] Additional outlets (e.g., second outlet 154) are other different openings, conduits or passages through which fluid flows out or is discharged from a system, device or apparatus. Second outlet 154 may be used for different purposes, locations or functions compared to first outlet 152. Second outlet 154 and any additional outlets may be designed to direct fluid flow to a specific area, achieve a desired flow distribution, or serve as an alternative outflow path.

[0023] The first channel 121 of the flow shaper 110 may include any width. The width of the first channel 121 of the flow shaper 110 may vary between the partition structure 120 and the first fin 122. The minimum width (or average width) of the first channel 121 of the flow shaper 110 between the partition structure 120 and the first fin 122 may be at least 2 mm (or at least 4 mm) and / or at most 10 mm (or at most 8 mm, or at most 6 mm). This range allows a balance to be achieved between providing enough space for airflow and maintaining appropriate air speed and pressure in the entire fan system. It can help ensure efficient operation, minimize turbulence, and maximize the performance of the fan in terms of airflow delivery and energy efficiency. All channels may include any width. In addition, the widths of different channels 121, 123, 125 may also vary depending on design requirements or intent.

[0024] When the heat exchanger is fixed to, adjacent to, or otherwise adjacent to the first outlet 152 of the centrifugal fan 100, the channel width of the flow shaper 110 can be wider than the width between adjacent fins in the fin stack of the heat exchanger. The wider channel width can allow for smoother fluid flow with reduced resistance. If the channel width is too narrow compared to the fin stack width, it may result in increased flow resistance, resulting in a higher pressure drop and reduced overall efficiency of the heat exchanger.

[0025] Figure 1 As further shown, the flow shaper 110 can further include a first fin 126 for a second outlet 154, thereby defining a first channel 125 of the second outlet 154 between the partitioning structure 120 and the first fin 126 for the second outlet 154. The first channel 125 of the second outlet 154 extends to the second outlet 154. Having a channel to the second outlet 154 in addition to the channel to the first outlet provides flexibility in fluid distribution, enables improved system balancing, and allows for more precise control of flow rate and direction within the centrifugal fan 100. The first channel 125 of the second outlet 154 can extend from an area near the impeller 104 to the second outlet.

[0026] Centrifugal fan 100 can be any type of fan or blower that operates according to the principle of centrifugal force. It consists of an impeller 104 or rotor that rotates within a housing or casing 108 to produce radial flow of a fluid. Centrifugal fan 100 can be used to generate fluid movement, create pressure differences, and promote the transfer of heat or mass in various applications. Although the accompanying drawings show centrifugal fan 100, other types of fans can be used, such as axial flow fans, cross flow fans, and bladed axial flow fans, etc.

[0027] In certain high-performance laptops, gaming laptops, or other electronic devices that generate a lot of heat, manufacturers may choose a centrifugal fan 100 instead of or in combination with an axial fan. The centrifugal fan 100 (also known as a radial fan) operates by drawing air into a centrally located fan housing and then redirecting it perpendicular to the axis of rotation before exhausting the air. This design allows for higher static pressure and improved airflow in a limited space, making it suitable for use in laptops with higher cooling requirements.

[0028] The fan (e.g., a centrifugal fan) includes an impeller. Impeller 104 can be a rotating component in a fluid handling system, typically used in a pump, fan, or turbine. Impeller 104 can include blades or vanes that impart kinetic energy to air or fluid, causing it to move, change in pressure, or accelerate the flow. It can be designed to efficiently transfer energy from a mechanical system to a fluid, thereby achieving pumping, mixing, or propulsion. Although the accompanying drawings show an impeller, other types of forced air fan assemblies, such as propellers and bladeless fans, can also be used.

[0029] The vicinity of impeller 104 refers to the close proximity between impeller 104 and other components within the fluid handling system. It represents the spatial relationship and proximity of impeller 104 to surrounding elements such as fins, partitions, housings, blades, channels, or any other structure involved in the fluid flow process.

[0030] Extending the channel from the close vicinity of the impeller 104 allows for a more direct and efficient transfer of fluid or air, minimizing energy losses and improving overall system performance. This can help optimize flow dynamics, reduce turbulence and enhance the effectiveness of the impeller 104 in generating and directing fluid flow. The channel can extend from the vicinity as close to the impeller 104 as possible, taking into account manufacturing tolerances and other tolerances. Appropriate space should be left between the impeller 104 and the channel to avoid damaging the fan or reducing airflow.

[0031] For example, the first fin 122 for the first outlet (and / or the second fin for the first outlet and / or the first fin for the second outlet) can be spaced apart from the impeller by at least 1 mm (or at least 0.01 mm, at least 0.1 mm, at least 0.5 mm, or at least 2 mm) and / or at most 2 mm (or at most 1 mm or at most 3 mm). In this way, the first channel of the first outlet (and / or the second channel of the first outlet and / or the first channel of the second outlet) can start in the vicinity of the impeller. Maintaining the distance between the first fin 122 and the impeller 104 within the above range can ensure a controlled and efficient flow path, minimize flow disturbances, optimize energy transfer, and maximize the performance of the fan by effectively utilizing the rotational energy of the impeller.

[0032] The first fin 122 for the first outlet 152 may include or may be made of plastic and / or metal (e.g., aluminum and / or copper). Using aluminum, copper, or similar materials for the fins in a heat exchanger provides excellent thermal conductivity, thereby achieving efficient heat transfer and improving the overall performance of the heat exchanger.

[0033] The height of the first fin 122 for the first outlet 152 can be at least 3.5 mm (or at least 10 mm, at least 7 mm, at least 2 mm, or at least 1 mm) and / or at most 15 mm (or at most 7 mm, at most 10 mm, at most 18 mm, or at most 20 mm). By maintaining the height of the first, second, or additional fins in the fan within the above ranges, a compact profile in the vertical plane (e.g., z-axis) can be achieved, allowing efficient use of space in the fan design while still providing sufficient surface area for effective heat transfer and maintaining a streamlined airflow path.

[0034] The length of the first fin 122 for the first outlet 152 can be at least 3.5 mm (or at least 10 mm, at least 7 mm, at least 2 mm, or at least 1 mm) and / or at most 15 mm. Maintaining the length of the first, second, or additional fins in the fan within the range of 3.5 mm to 15 mm (or at most 7 mm, at most 10 mm, at most 18 mm, or at most 20 mm) can allow for a compact design along a horizontal plane (e.g., x and / or y axis), thereby enabling efficient use of space while providing sufficient surface area for effective heat dissipation and ensuring an optimized airflow path.

[0035] The first channel 121 can extend at least partially along the tangent of the impeller 104. Extending along the tangential path of the impeller 104 can provide several benefits, including improved fluid flow direction, enhanced energy transfer, improved efficiency and reduced turbulence. Extending only partially along the path allows controlled redirection of the fluid or airflow. By initially aligning the path tangentially with the rotational motion of the impeller 104, the flow can take advantage of the initial momentum and direction provided by the impeller 104. Subsequent changes in the path allow the desired adjustment of the flow direction, speed or distribution, enabling more precise control and optimization of the fluid dynamics within the system. This approach provides flexibility in directing the flow to specific areas or components, optimizing performance, and achieving desired flow patterns or characteristics.

[0036] The first channel 121 can extend at least partially along a path originating from the periphery of the impeller 104. Initiating a channel at the periphery of the impeller 104 can allow better utilization of the available space in the fan. It can enable the channel or flow path to navigate around other components or structures, maximize the use of available area, and ensure efficient integration of the flow path in the overall design. In addition, by deviating from the tangential direction, it provides the opportunity to redirect the flow precisely to a target specific area, component or desired flow pattern in the system. This flexibility can be beneficial to optimizing heat transfer, achieving a desired flow rate, or managing fluid distribution according to system requirements. Additionally, the path originating from the periphery can help minimize flow interference with other components or structures.

[0037] The path along which the channel extends can be a tangential path. A tangential path can achieve a more direct or concentrated fluid or air transfer, maximize the use of the rotational motion of the impeller, and optimize the overall performance of the system. In addition, a tangential path can allow for a more concise and streamlined design, which can simplify the manufacturing process, reduce production costs, and improve overall production efficiency. The alignment of the channel with the rotational motion of the impeller contributes to a more intuitive and efficient construction of the flow shaper 110 components.

[0038] In the context of motion or flow, direction refers to the path or route that something moves or travels. It indicates the orientation or trajectory of the movement. A first direction and a second direction represent different paths or orientations of airflow. The contrast between different directions (e.g., the first direction and the second direction) lies in their different angles, paths, routes, or destinations. They can differ in angle, orientation, speed, or expected results, thereby producing different effects or results based on the direction selected. The choice of a particular direction may have a significant impact on the overall motion, flow, or expected results in a given context. For example, a first direction may refer to the trajectory of air toward a heat exchanger or exhaust port of an electronic device (e.g., a laptop), while a second direction may refer to the trajectory of air toward the internal components of the electronic device. Similarly, both directions may refer to separate heat exchangers or other components within the electronic device (e.g., CPU, motherboard, graphics card, etc.). For example, the latter case may occur in a high-pressure cooling system, where air can be first cooled before entering a fan, and the cool air can then be distributed to components within the electronic device.

[0039] The first direction of the first outlet may extend along an edge of the first outlet (e.g., an edge of the chassis of the fan), or may be a main airflow direction of the air output through the first outlet. Correspondingly, the second direction of the second outlet may extend along an edge of the second outlet (e.g., an edge of the chassis of the fan), or may be a main airflow direction of the air output through the second outlet. The main airflow direction may face the direction of the outlet, or average the airflow through the outlet.

[0040] The first direction of the first outlet and the second direction of the second outlet can enclose an angle greater than 60° (or greater than 80°) and / or less than 120° (or less than 100°). For example, the first direction and the second direction can be approximately perpendicular (e.g., 90°). The mentioned angle enclosed between the first direction and the second direction of the fan outlet can ensure efficient air distribution, thereby allowing effective airflow in different directions. This angle range promotes system balance, prevents uneven flow distribution, and maintains pressure balance. Additionally, it provides better airflow control, allowing more precise adjustment of flow rate and direction. Finally, this angle range can reduce flow disturbances and turbulence, promoting smooth and stable airflow within the system.

[0041] Partition structure 120 can be a watershed or a sub-watershed. A watershed can refer to a design feature often found in fluid flow applications such as pumps, fans, or turbines. It can be a shape or structure that is generally designed to reduce or minimize the resistance caused by fluid flow. A watershed can be designed to smoothly guide fluid around an object and prevent excessive turbulence or resistance.

[0042] In addition to the partition structure 120, Figure 1 Another watershed 129 is shown at the opposite end of the first outlet 152. This watershed, sometimes referred to as a main or compression watershed, can be used for air compression. The watershed 129 used for compression in the centrifugal fan 100 can be used to create a barrier or obstacle that redirects the airflow. It can help increase the pressure of the air as it passes through the fan, promoting efficient compression. This design feature can enhance the fan's ability to generate higher pressures and deliver more concentrated airflow, making it suitable for applications that require more robust air compression and movement.

[0043] For example, the fan chassis 108 may include a flow shaper 110. The fan chassis 108 is a structural housing or casing that houses fan components (such as a motor, impeller 104, back plate or base plate 106, and other associated components) to provide support, protection, and structural integrity for the fan system. The design of the fan chassis 108 may include specific structures or features that shape the outlet of the fan. This may involve openings or ducts present in the chassis that direct the airflow in a desired direction or provide a designated outlet for the exhausted air. The fan chassis 108 may play a role in directing and controlling the airflow path, which may be affected by its design and configuration. Integrating the flow shaper 110 into the fan chassis 108 installation may eliminate the need for additional components and provide a more compact and durable design.

[0044] The height of the fan chassis 108 can be at least 3.5 mm (or at least 10 mm, at least 7 mm, at least 2 mm, or at least 1 mm) and / or at most 15 mm (or at most 7 mm, at most 10 mm, at most 18 mm, or at most 20 mm). Having the fan chassis 108 have a thickness within the above range can ensure the structural integrity of the fan assembly by providing sufficient thickness to firmly support and protect internal components (such as motors and impellers 104). The specified thickness can also contribute to the rigidity and stability of the fan chassis 108, reducing vibration and bending that may have a negative impact on performance and increase noise levels. Additionally, keeping the fan chassis 108 within this thickness range can allow optimal space utilization, making it suitable for applications with limited space or desired compact designs.

[0045] For example, the height of the first fin 122 for the first outlet 152 of the fan chassis 108 can extend the height of the outlet. Extending the fin mount to the full height of the outlet can help minimize air leakage or bypass, ensuring that the maximum amount of air is directed toward the desired outlet. This can result in improved efficiency and effectiveness of the fan airflow, optimizing its performance, and achieving better airflow management within the system.

[0046] The first fin 122 for the first outlet 152 can be integrally formed on the top or base of the fan chassis 108. Integrating the fins into the top or base of the fan (e.g., base plate 106) can allow for easier assembly of the fan and ensure that the flow shaper 110 is in the correct position. The base plate 106 can be a component of the fan chassis 108 that provides structural support and stability for the fan assembly. It is typically located at the rear of the fan and serves as a mounting surface for the fan motor and other internal components. The base plate 106 can help secure the components in place and increase the rigidity of the fan chassis 108.

[0047] Further details and optional aspects may be described in conjunction with the examples described below.

[0048] Figure 2It is shown that the first fin 222 of the flow shaper 210 can extend beyond the first outlet 252 of the centrifugal fan. Extending the first, second or additional fins beyond the outlet of the fan provides additional benefits. First, it can help reduce air recirculation and backflow by directing the airflow away from the outlet 252. This ensures that the exhausted air is not immediately drawn back into the fan 201, thereby improving overall efficiency and preventing performance degradation. Second, by reducing turbulence and air disturbances near the outlet, extending the fins can help to better reduce noise. This can result in smoother and quieter airflow, thereby enhancing user comfort and reducing noise pollution. Additionally, the extended fins can be used as a protective barrier to prevent foreign matter or debris from entering the fan assembly and possibly causing damage. In general, extending the fins beyond the outlet of the fan can improve airflow directionality, improve efficiency, reduce noise, and provide additional protection for the fan system.

[0049] Figure 2 A heat exchanger 230 is shown that can be fixed to the centrifugal fan 201. The heat exchanger 230 can include a plurality of heat transfer fins 232, the plurality of heat transfer fins 232 are arranged in a fin stack 234, wherein the fin stack 234 has an inlet. The heat exchanger 230 can further include: a plurality of channels 221, the plurality of channels 221 are defined by a plurality of flow shaping fins extending beyond the inlet of the fin stack 234, wherein the width of the channel can be greater than the width between adjacent heat transfer fins in the fin stack 234.

[0050] Heat exchanger 230 may be a device or apparatus designed to transfer thermal energy between two or more fluids or substances at different temperatures. It facilitates efficient exchange of heat by enabling thermal energy to be transferred from a fluid or substance having a higher temperature to a fluid or substance having a lower temperature. Heat exchangers are commonly used in a variety of applications for heating, cooling, and energy recovery purposes. In electronic devices, they can be used to dissipate heat produced by components such as processors, transistors, or power modules, ensuring optimal operating temperatures and preventing overheating that could damage sensitive electronic circuits.

[0051] Heat exchanger 230 is usually composed of a series of tubes, plates or other heat transfer surfaces physically separated by the space through which air flows. This arrangement is conducive to transferring heat from hot air to cold tubes, plates or other heat transfer surfaces by conduction, convection or radiation. Heat exchanger 230 can also include fins, baffles or other flow shaping components to enhance heat transfer efficiency. The main goal of heat exchanger 230 is to maximize the heat transfer rate while minimizing energy loss and pressure drop.

[0052] Integrating the flow shaper into the heat exchanger 230 instead of the fan 201 provides several benefits. First, it allows for improved heat transfer efficiency within the heat exchanger 230. The flow shaper can help evenly distribute the air over the heat exchange surface, ensuring maximum contact and promoting efficient heat exchange. This results in enhanced thermal performance and improved overall heat transfer rates.

[0053] Secondly, incorporating a flow shaper into the heat exchanger 230 can help minimize the pressure drop or resistance within the system. By directing and controlling the fluid or gas flow, the flow shaper reduces turbulence and unnecessary flow interruptions, resulting in smoother fluid movement. This translates into lower energy consumption and improved system efficiency.

[0054] Additionally, the presence of flow shapers in the heat exchanger 230 can aid in noise reduction. By optimizing the fluid flow pattern and minimizing turbulence, the flow shapers can help reduce the noise generated by the movement of fluid within the heat exchanger 230, thereby enhancing user comfort.

[0055] The flow shaping fins 122 may be thin extended surfaces or structures attached to a heat exchanger 230, cooling device, or the like to enhance heat transfer between a fluid and the surrounding environment. The first fins 222 increase the surface area available for heat exchange, promoting efficient heat dissipation or absorption.

[0056] The flow shaping fins 222, 224, 228 may be integrally formed into the heat transfer fins of the fin stack 234. By integrating the flow shaping fins into the heat exchanger 230, airflow may be more accurately directed into the heat exchanger 230, thereby minimizing turbulence, reducing noise, and improving the efficiency of both the fan 201 and the heat exchanger 230. Additionally, when the heat exchanger 230 is connected to the fan 201, assembly may be simplified.

[0057] The partition or watershed fin 228 may be a flow shaping fin that may be adjacent to the partition or watershed 220 of the centrifugal fan 201. This may improve or increase the effect of the watershed on reducing noise and turbulence originating in the fan chassis. Additionally, this may help form the first channel 221 between the first flow shaping fin 222 and the partition fin 228 of the heat exchanger 230 by extending the effect of the partition 220 into the heat exchanger 230.

[0058] The width of the channel between the flow shaping fins can include any width. The width of the first channel 221 of the flow shaper 210 can vary between the partition fin 228 or structure 220 and the first fin 222. The minimum width (or average width) of the first channel 221 between the partition fin 228 or structure 220 and the first fin 222 of the flow shaper 210 can be at least 2 mm (or at least 4 mm) and / or at most 10 mm (or at most 8 mm, or at most 6 mm). The width should be adapted to the heat exchanger 230, the fan 201 and the specific thermal requirements to provide versatility and optimization of the fin design. A channel width of two to six millimeters can allow efficient and controlled airflow within the heat exchanger 230, thereby ensuring effective heat transfer across the exchange surface. The specified channel width can also promote the desired flow rate while minimizing pressure drop and flow interruption. In addition, the widths of different channels 221, 223, 225 can also vary depending on design requirements or intentions.

[0059] The flow shaping fins 222, 224, 228 may include at least one of plastic or metal (e.g., aluminum or copper). The flow shaping fins 222, 224, 228 in the heat exchanger may be made of metal, such as aluminum, copper, or other highly conductive materials due to their excellent thermal conductivity. This allows efficient heat transfer between the fluid and the fins, thereby enhancing the overall performance of the heat exchanger 230. Additionally, the metal provides durability and structural integrity to withstand the harsh operating conditions of the heat exchanger, ensuring long-term reliability. Plastics may also be used due to their ease of manufacturing, availability, and ease of forming. The choice of these materials also facilitates the manufacturing process, allowing the fins to be easily formed and integrated into the design of the heat exchanger 230.

[0060] The height of the heat exchanger 230 may be at least 3.5 mm (or at least 10 mm, at least 7 mm, at least 2 mm, or at least 1 mm) and / or at most 15 mm (or at most 7 mm, at most 10 mm, at most 18 mm, or at most 20 mm).

[0061] The minimum height should ensure that there is sufficient surface area for effective heat transfer, thereby maximizing thermal efficiency. The maximum height can be selected to maintain a compact profile, allowing for space-efficient integration in a variety of systems while minimizing overall size and weight. The height of the heat exchanger 230 can be tailored for a specific application while balancing thermal performance and space constraints.

[0062] The length of the flow shaping fins may be at least 0.1 mm (or at least 1 mm, at least 0.05 mm, at least 0.01 mm) and / or at most 5 mm (or at most 1 mm, at most 3 mm, at most 10 mm). The length of the flow shaping fins may be selected to allow airflow to enter the heat exchanger in the most efficient direction. The length of the flow shaping fins may also be selected to maintain a compact profile, thereby allowing for the most compatible integration in a variety of fans, or to allow for a space efficient design that minimizes overall size and weight.

[0063] The passage can extend at least partially along the path of the periphery of the impeller of the centrifugal fan. Initiating the passage at the periphery of the impeller can allow better utilization of the available space in the fan. It can enable the passage or flow path to navigate around other components or structures, maximize the use of available area, and ensure the efficient integration of the flow path in the overall design. In addition, by deviating from the tangential direction, it provides the opportunity of redirecting the flow to the target specific area, component or desired flow pattern in the system. This flexibility can be conducive to optimizing heat transfer, achieving desired flow rate, or managing fluid distribution according to system requirements. Additionally, the path derived from the periphery can help minimize the flow interference with other components or structures.

[0064] Figure 2 Further shown is a system 200, which includes a centrifugal fan 201 and a heat exchanger 230. The centrifugal fan 201 includes an impeller 204, a first outlet 252 along a first direction, and a second outlet 254 along a second direction. The heat exchanger 230 is adjacent to the first outlet 252 of the centrifugal fan. The system 200 further includes: a partition structure 220, the partition structure 220 is arranged at the inflection point area 251 between the first outlet and the second outlet 254; and a first fin 222 for the first outlet, thereby defining a first channel 221 between the partition structure 220 and the first fin 222. The first channel 221 extends from the vicinity of the impeller 204 to the first outlet.

[0065] Adding fins to the system allows for streamlining of the flow at the exit path from the fan chassis 208 to the heat exchanger 230. This can help reduce noise due to reduced air turbulence. Additionally, this approach improves the thermals of the system by more efficiently directing airflow through the heat exchanger 230. If the fins of the system are fully or partially integrated into the heat exchanger 230, the increase in the surface area of ​​the heat exchanger 230 can reduce the thermals of the system without affecting the airflow.

[0066] Figure 2Further shown is a system including: a second fin 224 for the first outlet, thereby defining a second channel 223 between the first fin 122 of the first outlet and the second fin 124 of the first outlet, wherein the second channel 223 extends from the vicinity of the impeller to the first outlet. Adding multiple fins and channels to the system can further improve airflow and reduce noise by further reducing turbulent areas and moving air faster through the heat exchanger 230. Additional fins can result in additional noise reduction as well as better thermal efficiency.

[0067] Figure 2 A system is further shown where the first fin 222 extends beyond the first outlet into the heat exchanger 230. Extending the fin through the heat exchanger 230 can allow for better integration with the heat exchanger 230 and better airflow direction, as well as increasing thermal efficiency by increasing the surface area of ​​the heat exchanger 230.

[0068] The first, second or additional channels 221 , 223 , 225 may include a width, wherein the width is at least 2 mm, at most 6 mm, and / or greater than a width between adjacent fins in the fin stack 234 of the heat exchanger 230 .

[0069] Figure 2 Further shown is a first fin 226 for a second outlet 254, thereby defining a first channel 225 for the second outlet 254 between the partition structure 220 and the first fin 226 for the second outlet 254, wherein the first channel 225 of the second outlet 254 extends to the second outlet 254. Having a channel to the second outlet 254 in addition to the channel to the first outlet provides flexibility in fluid distribution, enables improved system balancing, and allows for more precise control of flow rate and direction within the centrifugal fan.

[0070] Figure 2 Further details and optional aspects of the device can be combined with the above (e.g., Figure 1 ) or the examples described below (e.g., Figures 3A to 6 ) for description.

[0071] Figure 3A and Figure 3B Turbulence and noise in a baseline fan chassis 301 and a fan chassis with flow shapers 302 are shown, respectively. Figure 4A and Figure 4BThe air velocity in the baseline fan chassis 401 and the fan chassis 402 with flow shapers are shown respectively. The fan chassis plays an important role in shaping the airflow to the heat exchanger 330, 430. Based on the simulation data of several fan chassis models, it is observed that most of the noise generated is due to improper dissipation of air from the fan outlet towards the heat exchanger 330, 430. This is shown in FIG. Figure 3A and Figure 3B In both figures, noise power and airflow / air velocity simulations were performed on a fan chassis with flow shapers and a fan chassis without flow shapers.

[0072] The simulations for the fan chassis with and without flow shapers used the same heat exchanger 330, 430 and a fixed fan speed of 4200 rpm. In both chassis, the noise is generated from the blades of the impeller 304, 404 and from the watershed area 320, 420. The noise generated from the blades is small, while the noise generated from the watershed area is more prominent.

[0073] exist Figure 3A In the baseline chassis with , the turbulence and noise measured at the exit path between the impeller and the heat exchanger 230 was 56.6 decibel watts (dBW). Figure 3B A significantly reduced turbulence and noise of 54.6 dBW was measured in the chassis of the flow shaper. Therefore, the expected noise reduction was determined to be 1.9 dB. Further measurements found that the noise reduction occurred around 2500-3000 Hertz (Hz), which is a perceptible acoustic reduction.

[0074] Additionally, airflow was measured with and without the proposed modifications. Figure 4A shows the air velocity in the baseline fan chassis 108, and Figure 4B The air velocity in the fan chassis 108 with the flow shaper is shown. No negative impact of the modification was observed. Instead, a slight improvement in the average air velocity across three points was observed in the fan chassis 108 with the flow shaper. A summary of the measurements is highlighted in Table 1 below. Table 1

[0075] Therefore, adding directional fins in the fan chassis exit section streamlines the airflow as it strikes the heat exchanger 330, 430. This streamlining of the flow (at the exit path from the fan chassis to the heat exchanger 330, 430) can help reduce noise due to reduced air turbulence.

[0076] Adding a flow shaper to a fan can be done simply by integrating the flow shaper into the casing or chassis of the fan. Figure 5 A flow shaper 510 is shown integrated into the fan chassis 508 at the inflection point region between the first exhaust port 552 or outlet and the second exhaust port 554 or outlet of the fan 501. The flow shaper may also be integrated into the base plate 506 of the fan.

[0077] Adding the directional fins 622 to the fan chassis 608 does not add significant cost and has no Z impact on the fan or system chassis 608. This can be done Figure 6 It can be seen that Figure 6 The outline of the fan 601 including the flow shaper is shown. Adding the fins 622 to the chassis 608 does not add additional height to the fan.

[0078] The aspects and features described in relation to a particular example among the foregoing examples may be combined with one or more of the other examples to replace the same or similar features of the other examples or to additionally introduce these features into the other examples.

[0079] It is also understood that the disclosure of several steps, processes, operations or functions disclosed in the specification or claims should not be interpreted as implying that these operations must be performed in the described order, unless explicitly stated in a separate use case or necessary for technical reasons. Therefore, the previous description does not limit the performance of several steps or functions to a certain order. In addition, in other examples, a single step, function, process or operation may include and / or be decomposed into sub-steps, sub-functions, sub-processes or sub-operations.

[0080] If some aspects have been described in conjunction with a device or system, these aspects should also be understood as descriptions of corresponding methods. For example, a block, a device, or a functional aspect of a device or system may correspond to a feature (such as a method step) of a corresponding method. Accordingly, aspects described in conjunction with a method should also be understood as descriptions of properties or functional features of the corresponding block, corresponding element, corresponding device, or corresponding system.

[0081] An example (e.g., Example 1) is a flow shaper for a centrifugal fan, wherein the centrifugal fan includes an impeller, a first outlet along a first direction, and a second outlet along a second direction. The flow shaper includes: a partition structure, the partition structure is arranged at an inflection point area between the first outlet and the second outlet; and a first fin for the first outlet, thereby defining a first channel between the partition structure and the first fin, wherein the first channel extends from a vicinity of the impeller to the first outlet.

[0082] Another example (e.g., Example 2) relates to the previously described example (e.g., Example 1), further including: a second fin for the first outlet, thereby defining a second channel between the first fin of the first outlet and the second fin of the first outlet, wherein the second channel extends from an area near the impeller to the first outlet.

[0083] Another example (eg, Example 3) relates to the previously described example (eg, one of Examples 1-2), wherein the first fin extends beyond the first outlet of the centrifugal fan.

[0084] Another example (e.g., Example 4) relates to a previously described example (e.g., one of Examples 1 to 3), wherein the first channel includes a width, and the width is at least one of: at least two millimeters; at most six millimeters; or greater than the width between adjacent fins in a fin stack of a heat exchanger adjacent to a first outlet of a centrifugal fan.

[0085] Another example (e.g., Example 5) relates to a previously described example (e.g., one of Examples 1 to 4), further comprising: a first fin for a second outlet, thereby defining a first channel of the second outlet between the partitioning structure and the first fin for the second outlet, wherein the first channel of the second outlet extends to the second outlet.

[0086] Another example (eg, Example 6) relates to a previously described example (eg, one of Examples 1 to 5), wherein the first passage of the second outlet extends from a vicinity of the impeller.

[0087] Another example (eg, Example 7) relates to the previously described example (eg, one of Examples 1 to 6), wherein the first fin for the first outlet includes at least one of aluminum or copper.

[0088] Another example (eg, Example 8) relates to the previously described example (eg, one of Examples 1 to 7), wherein a height of the first fin for the first outlet is at least 3.5 mm and at most 15 mm.

[0089] Another example (eg, Example 9) relates to the previously described example (eg, one of Examples 1 to 8), wherein the length of the first fin for the first outlet is at least 3.5 mm and at most 15 mm.

[0090] Another example (eg, Example 10) relates to the previously described example (eg, one of Examples 1 to 9), wherein the distance between the first fin and the impeller is at least 0.01 mm and at most 1 mm.

[0091] Another example (eg, Example 11) relates to the previously described example (eg, one of Examples 1 to 10), wherein the first channel of the first outlet extends at least partially along a tangent line of the impeller.

[0092] Another example (eg, Example 12) relates to a previously described example (eg, one of Examples 1 to 11), wherein the first channel of the first outlet extends at least partially along a path originating from a periphery of the impeller.

[0093] Another example (eg, Example 13) relates to the previously described example (eg, Example 12), wherein the path is a tangential path.

[0094] Another example (eg, Example 14) relates to a previously described example (eg, one of Examples 1 to 13), wherein the first direction and the second direction enclose an angle greater than 60° and less than 100°.

[0095] Another example (eg, Example 15) relates to a previously described example (eg, one of Examples 1 to 14), wherein the partition structure is a watershed.

[0096] An example (eg, Example 16) is a fan chassis for a centrifugal fan, the fan chassis comprising a flow shaper according to a previously described example (eg, one of Examples 1 to 15).

[0097] Another example (eg, Example 17) relates to the previously described example (eg, Example 16), wherein the height of the fan chassis is at least 3.5 mm and at most 15 mm.

[0098] Another example (eg, Example 18) relates to a previously described example (eg, one of Examples 16-17), wherein a height of a first fin for a first outlet extends a height of the first outlet.

[0099] Another example (eg, Example 19) relates to a previously described example (eg, one of Examples 16 to 18), wherein a first fin for a first outlet is integrally formed on a top or base of a fan chassis.

[0100] An example (e.g., Example 20) relates to a heat exchanger that can be fixed to a centrifugal fan. The heat exchanger includes: a plurality of heat transfer fins, the plurality of heat transfer fins are arranged in a fin stack, wherein the fin stack has an inlet. The heat exchanger further includes: a plurality of channels, the plurality of channels are defined by a plurality of flow shaping fins extending beyond the inlet of the fin stack, wherein the width of the channel is greater than the width between adjacent heat transfer fins in the fin stack.

[0101] Another example (eg, Example 21) relates to the previously described examples (eg, Example 20) wherein the flow shaping fins are integrally formed into the heat transfer fins of the fin stack.

[0102] Another example (eg, Example 22) relates to a previously described example (eg, one of Examples 20-21), wherein the width of the plurality of channels is at least 2 mm and at most 6 mm.

[0103] Another example (eg, Example 23) relates to the previously described examples (eg, one of Examples 20 to 22), wherein the flow shaping fins include at least one of aluminum or copper.

[0104] Another example (eg, Example 24) relates to a previously described example (eg, one of Examples 20 to 23), wherein the height of the heat exchanger is at least 3.5 mm and at most 15 mm.

[0105] Another example (eg, Example 25) relates to the previously described examples (eg, one of Examples 20 to 24), wherein the length of the flow shaping fin is at least 0.1 mm and at most 5 mm.

[0106] Another example (eg, Example 26) relates to a previously described example (eg, one of Examples 20 to 25), wherein the plurality of channels extend at least partially along a path originating from a periphery of an impeller of a centrifugal fan.

[0107] An example (e.g., Example 27) relates to a system including a centrifugal fan and a heat exchanger. The centrifugal fan includes an impeller, a first outlet along a first direction, and a second outlet along a second direction. The heat exchanger is adjacent to the first outlet of the centrifugal fan. The system further includes: a partition structure, the partition structure is arranged at the inflection point area between the first outlet and the second outlet; and a first fin for the first outlet, thereby defining a first channel between the partition structure and the first fin, wherein the first channel extends from the vicinity of the impeller to the first outlet.

[0108] Another example (e.g., Example 28) relates to the previously described example (e.g., Example 27), further including: a second fin for the first outlet, thereby defining a second channel between the first fin of the first outlet and the second fin of the first outlet, wherein the second channel extends from an area near the impeller to the first outlet.

[0109] Another example (eg, Example 29) relates to a previously described example (eg, one of Examples 27-28), wherein the first fin extends beyond the first outlet into the heat exchanger.

[0110] Another example (e.g., Example 30) relates to a previously described example (e.g., one of Examples 27 to 29), wherein the first channel includes a width, and the width is at least one of: at least two millimeters; at most six millimeters; or greater than the width between adjacent heat transfer fins in a fin stack of the heat exchanger.

[0111] Another example (e.g., Example 31) relates to a previously described example (e.g., one of Examples 27 to 30), further comprising: a first fin for a second outlet, thereby defining a first channel of the second outlet between the partitioning structure and the first fin for the second outlet, wherein the first channel of the second outlet extends to the second outlet.

[0112] The disclosed methods, apparatuses, and systems should not be interpreted as limiting in any way. Instead, the present disclosure is directed to all novel and non-obvious features and aspects of each disclosed example, individually and in various combinations and sub-combinations with each other. The disclosed methods, apparatuses, and systems are not limited to any specific aspect or feature or combination thereof, nor do the disclosed examples require the existence of any one or more specific advantages or the resolution of any one or more specific problems.

[0113] The theories of operation, scientific principles, or other theoretical descriptions presented herein with reference to the devices or methods of the present disclosure are provided for the purpose of better understanding and are not intended to limit the scope. The devices and methods in the appended claims are not limited to those devices and methods that function in the manner described by such theories of operation.

[0114] The attached claims are hereby included in the detailed description, wherein each claim itself can serve as a separate example. It should be noted that although a dependent claim refers to a specific combination with one or more other claims in the claims, other examples may also include a combination of the dependent claim with the subject matter of any other dependent or independent claim. Such combinations are expressly proposed here, unless it is stated in individual cases that a specific combination is not intended. In addition, even if a claim is not directly limited to refer to any other independent claim, the features of the claim should also be included for any other independent claim.

Claims

1. A flow shaper (110) for a centrifugal fan (100), characterized in that: The centrifugal fan (100) comprises an impeller (104), a first outlet (152) along a first direction, and a second outlet (154) along a second direction, and the flow shaper (110) comprises: a partition structure (120), the partition structure (120) being arranged at an inflection point region (151) between the first outlet (152) and the second outlet (154); and A first fin (122) for the first outlet (152) defines a first channel (121) between the partition structure (120) and the first fin (122), wherein the first channel (121) extends from a vicinity of the impeller (104) to the first outlet (152).

2. The flow shaper (110) of claim 1, further comprising: A second fin (124) for the first outlet (152) defines a second channel (123) between the first fin (122) of the first outlet (152) and the second fin (124) of the first outlet (152), wherein the second channel (123) extends from a vicinity of the impeller (104) to the first outlet (152).

3. The flow shaper (110) according to claim 1 or 2, characterized in that: The first fin (122) extends beyond the first outlet (152) of the centrifugal fan (100).

4. The flow shaper (110) according to claim 1 or 2, further comprising: A first fin (126) for the second outlet (154) defines a first channel (125) of the second outlet (154) between the partition structure and the first fin (126) for the second outlet (154), wherein the first channel (125) of the second outlet (154) extends to the second outlet (154).

5. The flow shaper (110) according to claim 5, characterized in that: The first passage (125) of the second outlet (154) extends from a vicinity of the impeller (104).

6. The flow shaper (110) according to claim 1 or 2, characterized in that: The first fin (122) for the first outlet (152) includes at least one of aluminum or copper.

7. The flow shaper (110) according to claim 1 or 2, characterized in that: The distance between the first fin (122) and the impeller (104) is at least 0.01 mm and at most 1 mm.

8. The flow shaper (110) according to claim 1 or 2, characterized in that: The first passage (121) of the first outlet (152) extends at least partially along a tangent line of the impeller (104).

9. The flow shaper (110) according to claim 1 or 2, characterized in that: The first passage (121) of the first outlet (152) extends at least partially along a path originating from a periphery of the impeller (104).

10. The flow shaper (110) according to claim 9, characterized in that: The path is a tangential path.

11. The flow shaper (110) according to claim 1 or 2, characterized in that: The first direction and the second direction form an angle greater than 60 degrees and less than 100 degrees.

12. The flow shaper (110) according to claim 1 or 2, characterized in that: The partition structure (120) is a water divider.

13. A fan chassis (108) for a centrifugal fan (100), the fan chassis (108) comprising the flow shaper (110) of any one of the preceding claims.

14. The fan chassis (108) according to claim 13, characterized in that The height of the first fin (122) for the first outlet (152) extends the height of the first outlet (152).

15. The fan chassis (108) according to claim 13 or 14, characterized in that The first fin (122) for the first outlet (152) is integrally formed on the top or base of the fan chassis (108).

16. A heat exchanger (230) capable of being fixed to a centrifugal fan (201), the heat exchanger (230) comprising: a plurality of heat transfer fins (232) arranged in a fin stack (234), wherein the fin stack (234) has an inlet; A plurality of channels (221, 223) are defined by a plurality of flow shaping fins (222, 224, 228) extending beyond the inlet of the fin stack (234), wherein the width of the channels is greater than the width between adjacent heat transfer fins (232) in the fin stack (234).

17. The heat exchanger (230) according to claim 16, characterized in that: The flow shaping fins (222, 224, 228) are integrally formed into the heat transfer fins (232) of the fin stack (234).

18. The heat exchanger (230) according to claim 16 or 17, characterized in that: The width of the plurality of channels (221, 223) is at least 2 mm and at most 6 mm.

19. The heat exchanger (230) according to claim 16 or 17, characterized in that: The flow shaping fins (222, 224, 228) include at least one of aluminum or copper.

20. The heat exchanger (230) according to claim 16 or 17, characterized in that: The plurality of channels (221, 223) extend at least partially along a path originating from a periphery of an impeller (204) of the centrifugal fan (201).

21. A system (200) comprising a centrifugal fan (201) and a heat exchanger (230), in, The centrifugal fan (201) comprises an impeller (204), a first outlet (252) along a first direction, and a second outlet (254) along a second direction. wherein the heat exchanger (230) is adjacent to the first outlet of the centrifugal fan (201), Wherein, the system (200) comprises: a partition structure (220), the partition structure (220) being arranged at an inflection point region (251) between the first outlet (252) and the second outlet (254); and A first fin (222) for the first outlet (252) defines a first channel (221) between the partition structure (220) and the first fin (222), wherein the first channel (221) extends from a vicinity of the impeller (204) to the first outlet (252).

22. The system (200) of claim 21, further comprising: A second fin (224) for the first outlet (252) is provided to define a second channel (223) between the first fin (222) of the first outlet (252) and the second fin (224) of the first outlet (252), wherein the second channel (223) extends from a vicinity of the impeller (204) to the first outlet (252).

23. The system (200) according to claim 21 or 22, characterized in that The first fin (222) extends beyond the first outlet (252) into the heat exchanger (230).

24. The system (200) according to claim 21 or 22, characterized in that The first channel (221) comprises a width, wherein the width is at least one of: At least two millimeters; Up to six millimetres; or Greater than the width between adjacent heat transfer fins (232) in a fin stack (234) of the heat exchanger (230).

25. The system (200) of claim 21 or 22, further comprising: A first fin (226) for the second outlet (254) defines a first channel (225) of the second outlet (254) between the partition structure (220) and the first fin (226) for the second outlet (254), wherein the first channel (225) of the second outlet (254) extends to the second outlet (254).

Images