Cooling assembly

Abstract

This invention provides a heat dissipation assembly, including a base plate, heat dissipation fins, a frame, and a fan. Multiple heat dissipation fins are disposed on the base plate. The frame is disposed on the base plate and covers the heat dissipation fins. The heat dissipation fins and the base plate are assembled to form a heat conduction channel and a channel inlet. The frame includes a first plane, a second plane, and an inclined surface. The first plane is spatially opposite to the heat dissipation fins, the second plane has an air inlet, the heat conduction channel connects the channel inlet and the air inlet, and the inclined surface connects the first plane and the second plane. The cross-sectional area of ​​the heat conduction channel adjacent to the channel inlet is larger than the cross-sectional area of ​​the heat conduction channel adjacent to the air inlet. The fan includes a top cover and an impeller. The impeller is disposed on the top cover, which is spatially opposite to the air inlet and assembled with the frame to form an air outlet. The channel inlet and the heat conduction channel are connected to the air outlet through the air inlet.

Description

Technical Field

[0001] This case relates to a heat dissipation assembly, and more particularly to a heat dissipation assembly that improves the performance and noise level of a heat conduction channel through specific cross-sectional area control and related feature additive effects. Background Technology

[0002] Electronic devices typically utilize heat dissipation assemblies to dissipate internal heat. A traditional heat dissipation assembly mainly consists of a centrifugal fan and heat sink fins. The heat sink fins are located at the fan's outlet and connected to it, while the heat sink fins are thermally coupled to the heat-generating components within the electronic device. When the heat-generating components generate heat, the resulting heat is conducted to the heat sink fins, and the cooling airflow generated by the centrifugal fan blows directly from the outlet onto the heat sink fins, thereby achieving heat dissipation.

[0003] With increasing demands for heat dissipation, heat sink fins have been further designed as heat dissipation channels to complement the high-speed airflow from centrifugal fan outlets. However, when the high-speed airflow from a centrifugal fan directly hits the heat sink fins within the heat dissipation channels, the resulting airflow variations are difficult to control and often generate significant noise. In a centrifugal fan, air enters axially from the impeller, flows radially along the impeller, converges into a high-pressure fluid through the fan channel, and is then blown into the heat dissipation channels from the radial outlet. When the fluid velocity is too high, the resulting high-pressure fluid can easily affect the blade passing frequency, generating noise and thus reducing the user experience. Therefore, how to solve the noise generated by centrifugal fans combined with heat dissipation channels has always been a major concern in this field.

[0004] In view of this, it is necessary to provide a heat dissipation assembly that improves the performance and noise level of the heat conduction channel by controlling the specific cross-sectional area and the additive effect of related features, so as to solve the shortcomings of the prior art. Summary of the Invention

[0005] The purpose of this invention is to provide a heat dissipation assembly in which a heat dissipation channel formed by heat sink fins is positioned at the air inlet of a centrifugal fan, thereby producing different heat dissipation effects. The heat dissipation of the heat sink fins within the heat dissipation channel is influenced by the intake airflow of the centrifugal fan, rather than the exhaust airflow. The heat dissipation channel is connected upstream of the centrifugal fan's air inlet, and the heat sink fins provide a rectification effect for the incoming airflow. Furthermore, by modifying the cross-sectional design of the heat dissipation channel and its associated additive effects, the performance and noise level of the heat dissipation channel are further improved.

[0006] Another objective of this project is to provide a heat dissipation assembly. The frame, heat sink fins, and base plate combine to form a heat conduction channel. The end of the heat conduction channel connects to a fan and an exhaust vent at different horizontal levels via an air inlet on the frame. The heat conduction channel upstream of the fan inlet further incorporates the characteristic design of the heat sink fins and channel reduction to achieve a rectification effect. The center of the fan impeller is eccentrically positioned relative to the air inlet, and the impeller hub, in conjunction with the chamfered structure of the heat sink fins, features a guide slope to further enhance the rectification effect. The first end of the heat sink fins near the channel inlet and the second end near the air inlet have guide angles, which, combined with the angle of the guide slope on the impeller hub, can achieve a rectification effect when the flow enters another area, reducing turbulent energy by 15%. Furthermore, the height difference between the area near the channel inlet and the area near the air inlet can reach 50%, concentrating the airflow input on the fan inlet side. Combined with a specific proportional change in the cross-sectional area of ​​the heat conduction channel where the heat sink fins are located, the concentration effect of the flow field can be increased by 20% in performance output. On the other hand, to accommodate designs with varying pressures, the air inlet is designed with an off-center profile to match the impeller's center. Simultaneously, the distance from the end of the heat dissipation channel to the impeller center, the width ratio of the air inlet to the heat dissipation channel, and the opening area of ​​the air outlet relative to the channel inlet are adjusted to ensure effective flow field utilization, thereby increasing efficiency and reducing noise. By placing the heat dissipation fins within the heat dissipation channel upstream of the air inlet, the heat dissipation performance of this heat dissipation assembly is improved by 15% under the same fan speed conditions, while also improving noise quality, achieving a 10% noise reduction effect.

[0007] To achieve the aforementioned objectives, this invention provides a heat dissipation assembly, including a base plate, multiple heat dissipation fins, a frame, and a fan. The base plate includes a front end and a rear end disposed opposite to each other. Multiple heat dissipation fins are disposed on the base plate, arranged at intervals and extending from the front end to the rear end. The frame is disposed on the base plate, covering the multiple heat dissipation fins, and is assembled with the base plate to form a heat conduction channel and a channel inlet. The channel inlet is adjacent to the front end, and the heat conduction channel passes through the multiple heat dissipation fins. The frame includes a first plane, a second plane, and an inclined surface. The first plane is adjacent to the front end and spatially opposite to the multiple heat dissipation fins. The second plane is adjacent to the rear end and has an air inlet. The heat conduction channel connects the channel inlet and the air inlet. The inclined surface connects the first plane and the second plane. The cross-sectional area of ​​the heat conduction channel adjacent to the channel inlet is larger than the cross-sectional area of ​​the heat conduction channel adjacent to the air inlet. The fan includes a top cover and an impeller. The impeller is located on the top cover, which is spatially opposite to the air inlet and is assembled with the frame to form an air outlet. The flow channel inlet and the heat conduction channel are connected to the air outlet through the air inlet.

[0008] In one embodiment, the frame includes a flow guide wall, a first side wall, and a second side wall. The first side wall and the second side wall are disposed opposite to each other and are respectively connected to two opposite sides of a first plane. The flow guide wall is disposed on the first plane, connects to the first side wall of the frame, extends along the front end to the rear end, and leaves the first side wall to a fixed isolation distance.

[0009] In one embodiment, the heat guide channel near the channel inlet forms a first cross-sectional area by a first plane, a first sidewall, a second sidewall, and a bottom plate, wherein the heat guide channel through the guide wall forms a second cross-sectional area by a first plane, a guide wall, a second sidewall, and a bottom plate, wherein the second cross-sectional area is 2 / 3 times the first cross-sectional area.

[0010] In one embodiment, the heat conduction channel near the channel inlet forms a first cross-sectional area by a first plane, a first sidewall, a second sidewall, and a bottom plate, wherein the heat conduction channel near the air inlet forms a third cross-sectional area by a second plane, a second sidewall, and a bottom plate, wherein the second cross-sectional area is 1 / 2 times the first cross-sectional area.

[0011] In one embodiment, the height distance between the first plane and the base plate is greater than the height distance between the second plane and the base plate.

[0012] In one embodiment, the impeller has a blade height greater than the height distance between the second plane and the base plate.

[0013] In one embodiment, each heat dissipation fin has a first end and a second end, which are disposed opposite to each other. The first end of the heat dissipation fin is adjacent to the flow channel inlet and has a first chamfer structure. The first chamfer structure forms a first oblique angle relative to the horizontal surface of the base plate. The second end of the heat dissipation fin is adjacent to the air inlet and has a second chamfer structure. The second chamfer structure forms a second oblique angle relative to the horizontal surface of the base plate.

[0014] In one embodiment, a hub of the impeller has a guide slope that forms a third angle relative to the horizontal plane of the base plate, wherein the third angle is equal to the first angle or the second angle.

[0015] In one embodiment, the air inlet includes a leading edge and a trailing edge, respectively, relative to the front end and the rear end. The center of the impeller has a first horizontal distance from the trailing edge, and the center of the impeller has a second horizontal distance from the leading edge, wherein the first horizontal distance is less than 85% of the second horizontal distance.

[0016] In one embodiment, the center of the impeller is at a third horizontal distance from one end of the heat conduction channel, wherein the third horizontal distance is less than 120% of the first horizontal distance.

[0017] In one embodiment, the flow channel inlet has a first width and the air inlet has a second width, the first width being greater than the second width.

[0018] In one embodiment, the flow channel inlet has a first opening area and the air outlet has a second opening area, wherein the first opening area is larger than the second opening area.

[0019] In one embodiment, the frame includes a flow guide wall, a first side wall, and a second side wall. The first side wall and the second side wall are disposed opposite to each other and are respectively connected to two opposite sides of the first plane. The flow guide wall is connected to the first side wall of the frame, extends along the direction from the front end to the rear end, and gradually moves away from the first side wall.

[0020] In one embodiment, the upper edges of the plurality of heat dissipation fins are adjacent to a first plane, an inclined plane, and a second plane.

[0021] In one embodiment, the flow channel inlet and the air outlet are staggered in the view from the front end to the rear end, and have different horizontal heights relative to the base plate.

[0022] To achieve the aforementioned objectives, this application also provides a heat dissipation assembly, including a frame and a fan. The frame includes a heat conduction channel and a channel inlet, with the channel inlet adjacent to one end of the frame, and the heat conduction channel communicating with the outside through the channel inlet. The frame includes a first plane, a second plane, and an inclined plane. The first plane is adjacent to the channel inlet, the inclined plane connects the first plane and the second plane, and the second plane has an air inlet. The heat conduction channel communicates with the channel inlet and the air inlet, wherein the cross-sectional area of ​​the heat conduction channel adjacent to the channel inlet is larger than the cross-sectional area of ​​the heat conduction channel adjacent to the air inlet. The fan includes a top cover and an impeller, the impeller being disposed on the top cover. The top cover is spatially opposite to the air inlet and is assembled with the frame to form an air outlet. The channel inlet and the heat conduction channel communicate with the air outlet through the air inlet.

[0023] In one embodiment, the inclined surface is arc-shaped relative to the air inlet.

[0024] In one embodiment, the airflow from the flow channel inlet to the air inlet and the airflow from the air inlet to the air outlet have different horizontal heights.

[0025] In one embodiment, the flow channel inlet and the air outlet are located on different sides of the frame.

[0026] In one embodiment, the flow channel inlet and the air outlet are located on different sides of the air inlet. Attached Figure Description

[0027] Figure 1 To reveal the external structural diagram of the heat dissipation assembly in the first embodiment of this case;

[0028] Figure 2 To reveal the exploded view of the heat dissipation assembly in the first embodiment of this case;

[0029] Figure 3To reveal an exploded view of the heat dissipation assembly of the first embodiment of this case from another perspective;

[0030] Figure 4 To reveal Figure 1 A cross-sectional view of the heat dissipation assembly in the first section;

[0031] Figure 5 To reveal Figure 1 A cross-sectional view of the heat dissipation assembly in the second section;

[0032] Figure 6 To reveal Figure 1 A cross-sectional view of the heat dissipation assembly in the third section;

[0033] Figure 7 To reveal Figure 1 Longitudinal cross-sectional view of the heat dissipation assembly;

[0034] Figure 8 for Figure 7 A magnified view of region P;

[0035] Figure 9 This is a schematic diagram illustrating the dimensional correspondence of the components in the heat dissipation assembly of the first embodiment of this case;

[0036] Figure 10 To show the front view of the heat dissipation assembly of the first embodiment of this case;

[0037] Figure 11 To show the rear view of the heat dissipation assembly of the first embodiment of this case;

[0038] Figure 12 To reveal the exploded view of the heat dissipation assembly of the second embodiment of this case;

[0039] Figure 13 This is an exploded view showing the structure of the heat dissipation assembly of the second embodiment of this case from another perspective;

[0040] Figure 14 To reveal the exploded view of the heat dissipation assembly of the third embodiment of this case;

[0041] Figure 15 This is an exploded view showing the structure of the heat dissipation assembly of the third embodiment of this case from another perspective;

[0042] Figure 16 To reveal the exploded view of the heat dissipation assembly in the fourth embodiment of this case;

[0043] Figure 17 To reveal the longitudinal cross-sectional structure of the heat dissipation assembly in the fourth embodiment of this case;

[0044] Figure 18 This is a three-dimensional structural diagram of the heat dissipation assembly in the fifth embodiment of this case.

[0045] [Symbol Explanation]

[0046] 1, 1a, 1b, 1c, 1d: Heat dissipation assembly

[0047] 10: Base plate

[0048] 11: Frontend

[0049] 12: Backend

[0050] 20: Heat dissipation fins

[0051] 21: First End

[0052] 22: Second end

[0053] 23: Heat dissipation channel

[0054] 231: Tail End

[0055] 30: Frame

[0056] 30a: First sidewall

[0057] 30b: Second sidewall

[0058] 31: Flow channel inlet

[0059] 32: Air Inlet

[0060] 33: First plane

[0061] 34, 34': Bevel

[0062] 35: Second plane

[0063] 36, 36a: Guide wall

[0064] 37: Heat dissipation channel

[0065] 40: Fan

[0066] 41: Top Cover

[0067] 42: Air vent

[0068] 43: Impeller

[0069] 431: Wheel hub

[0070] 432: Blade

[0071] 50: Frame

[0072] 51: Inner cover

[0073] A1: First oblique angle

[0074] A2: Second oblique angle

[0075] A3: Third oblique angle

[0076] BD1: First horizontal distance

[0077] BD2: Second horizontal distance

[0078] BD3: Third horizontal distance

[0079] C: Center

[0080] CS1, CS2, CS3: Sections

[0081] H1, H2: Height Distance

[0082] O1: Area of ​​the first opening

[0083] O2: Area of ​​the second opening

[0084] P: Region

[0085] S1: Area of ​​the first cross-section

[0086] S2: Area of ​​the second cross-section

[0087] S3: Area of ​​the third cross-section

[0088] W1: First width

[0089] W2: Second width

[0090] X, Y, Z: Axes Detailed Implementation

[0091] Some typical embodiments embodying the features and advantages of this invention will be described in detail in the following description. It should be understood that this invention can have various variations in different implementations, all of which do not depart from the scope of this invention, and the descriptions and drawings herein are for illustrative purposes only and not for limiting the invention. For example, if the following description of a first feature disposed on or above a second feature indicates that it includes embodiments where the first and second features are in direct contact, and also includes embodiments where additional features may be disposed between the first and second features, so that the first and second features may not be in direct contact. Furthermore, different embodiments in this disclosure may use repeated reference numerals and / or markings. These repetitions are for simplification and clarity and are not intended to limit the relationships between the various embodiments and / or the described appearance structures. Moreover, to facilitate the description of the relationship between one component or feature and another (plural) component or feature in the drawings, spatially related terms such as "front," "rear," "top," "bottom," "upper," "lower," and similar terms may be used. In addition to the orientations shown in the accompanying drawings, spatially relevant terms are used to cover different orientations of the device in use or operation. The device may also be otherwise positioned (e.g., rotated 90 degrees or located in other orientations), and the descriptions of the spatially relevant terms used will be interpreted accordingly. Furthermore, when a component is referred to as "connected to" or "coupled to" another component, it may be directly connected to or coupled to the other component, or there may be intervening components. Although the numerical ranges and parameters of the broad scope of this disclosure are approximate, values ​​are stated as precisely as possible in specific examples. Additionally, it is understood that although terms such as "first," "second," and "third" may be used in the claims to describe different components, these components should not be limited by these terms, and the components described accordingly in the embodiments are represented by different component symbols. These terms are used to distinguish different components. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component without departing from the scope of the embodiments.

[0092] Figure 1This diagram illustrates the external structure of the heat dissipation assembly according to the first embodiment of this invention. In this embodiment, a heat dissipation assembly 1 is provided, including a bottom plate 10, multiple heat dissipation fins 20, a frame 30, and a fan 40. The bottom plate 10 includes a front end 11 and a rear end 12 disposed opposite to each other. The multiple heat dissipation fins 20 are disposed on the bottom plate 10, spaced apart from each other, and extend along the direction from the front end 11 to the rear end 12. The frame 30 is disposed on the bottom plate 10, covers the multiple heat dissipation fins 20, and is assembled with the bottom plate 10 to form an airflow inlet 31. The airflow inlet 31 is adjacent to the front end 11. The fan 40 is disposed on the frame 30. The top cover 41 of the fan 40 is assembled with the frame 30 to form an airflow outlet 42. In this embodiment, the heat dissipation fins 20 are thermally coupled to the heat-generating element (not shown) via the base plate 10 for heat dissipation. The required cooling airflow is drawn in through the flow channel inlet 31 by the fan 40, and the airflow passing through the heat dissipation fins 20 is discharged through the air outlet 42 of the fan 40. In this embodiment, the fan 40 is a centrifugal fan. To ensure that the suction airflow acts on the heat dissipation fins 20, the flow channel inlet 31 and the air outlet 42 are offset in the viewing direction from the front end 11 to the rear end 12, and have different horizontal heights relative to the base plate 10.

[0093] It should be noted that in all embodiments of this case, the front end 11 and the rear end 12 are not a single cross section. That is, the base plate 10 can be a large extended plane, with heat dissipation fins 20 provided only in one area, covered by the frame 30.

[0094] Figure 2 This is an exploded view of the heat dissipation assembly according to the first embodiment of this invention. In this embodiment, the frame 30 is disposed on the base plate 10, covering multiple heat dissipation fins 20, and is connected to the base plate 10 through the first sidewall 30a and the second sidewall 30b to form a heat conduction channel 23. The heat conduction channel 23 extends from the channel inlet 31 along the front end 11 to the rear end 12 through the first end 21 and the second end 22 of the multiple heat dissipation fins 20. The frame 30 has an inlet 32 ​​that penetrates the frame 30 and communicates with the heat conduction channel 23. The fan 40 includes a top cover 41 and an impeller 43. The impeller 43 is disposed on the top cover 41. The top cover 41 is spatially opposite to the inlet 32 ​​and is connected to the frame 30 to form an outlet 42. The channel inlet 31 and the heat conduction channel 23 are connected to the outlet 42 through the inlet 32.

[0095] Figure 3This is an exploded view showing the structure of the heat dissipation assembly of the first embodiment of this invention from another perspective. In this embodiment, the frame 30 includes a first plane 33, a second plane 35, and an inclined plane 34. The first plane 33 is adjacent to the front end 11 and spatially opposite to the plurality of heat dissipation fins 20. The second plane 35 is adjacent to the rear end 12, and the air inlet 32 ​​is disposed on the second plane 35. The heat conduction channel 23 formed by the combined frame 30 and the base plate 10 communicates between the channel inlet 31 and the air inlet 32. In addition, the inclined plane 34 connects the first plane 33 and the second plane 35. In this embodiment, the frame 30 also includes a guiding wall 36, disposed between the first side wall 30a and the second side wall 30b. The first side wall 30a and the second side wall 30b are disposed opposite each other and are respectively connected to the two opposite sides of the first plane 33, the inclined plane 34, and the second plane 35. The guide wall 36 is at least disposed on the first plane 33, connecting to the first side wall 30a of the frame 30, extending along the direction from the front end 11 to the rear end 12 and moving away from the first side wall 30a to a fixed isolation distance. In other words, the guide wall 36 can be designed in two sections, for example, with the front section narrowing relative to the second side wall 30b and the rear section parallel to the second side wall 30b. In other embodiments, the rear section of the guide wall 36 extends further to the inclined surface 34 and the second plane 35, adjacent to the side edge of the air inlet 32. Of course, this invention is not limited to this. It is worth noting that, through the design of the guide wall 36, the cross-sectional area of ​​the heat guide channel 23 near the channel inlet 31 is larger than the cross-sectional area of ​​the heat guide channel 23 near the air inlet 32, which helps to generate a channel reduction rectification effect when the airflow passes through the heat guide channel 23.

[0096] Figure 4 To reveal Figure 1 The heat dissipation assembly is shown in a transverse cross-sectional view of the first section CS1. In this embodiment, the heat conduction channel 23 is located near the channel inlet 31 as the first section CS1, which is formed by the first plane 33, the first sidewall 30a, the second sidewall 30b, and the base plate 10 to form a first cross-sectional area S1.

[0097] Figure 5 To reveal Figure 1 The heat dissipation assembly is shown in a transverse cross-sectional view of the second section CS2. The second section CS2 is located where the heat flow channel 23 passes through the guide wall 36, and is formed by the first plane 33, the guide wall 36, the second sidewall 30b, and the base plate 10, creating a second cross-sectional area S2. (Reference) Figure 4 and Figure 5 In this embodiment, the second cross-sectional area S2 is 2 / 3 times the first cross-sectional area S1. Therefore, the front section of the heat-conducting channel 23 can achieve optimal rectification effect through channel reduction.

[0098] Figure 6 To reveal Figure 1 A cross-sectional view of the heat dissipation assembly in the third section CS3. In this embodiment, the third section CS3 is located near the air inlet 32 ​​of the heat flow channel 23, and is formed by the second plane 35, the second sidewall 30b, and the base plate 10, creating a third cross-sectional area S3. (See reference...) Figure 4 and Figure 6 In this embodiment, the third cross-sectional area S3 is half the first cross-sectional area S1. Therefore, the rectification effect can be optimized in the rear section of the heat-conducting channel 23 by reducing the channel size.

[0099] Figure 7 To reveal Figure 1 Longitudinal cross-sectional view of the heat dissipation assembly. In this embodiment, the height distance H2 between the first plane 33 and the base plate 10 is greater than the height distance H1 between the second plane 35 and the base plate 10. In other words, when the first plane 33 is connected to the second plane 35 through the inclined surface 34, the height of the heat conduction channel 23 is reduced, making the cross-sectional area of ​​the adjacent flow channel inlet 31 larger than the cross-sectional area of ​​the heat conduction channel 23 adjacent to the air inlet 32. This helps to generate a flow channel reduction rectification effect when the airflow passes through the heat conduction channel 23. In this embodiment, the upper edges of the multiple heat dissipation fins 20 are adjacent to the first plane 33, the inclined surface 34, and the second plane 35, so that when the airflow passes through the heat conduction channel 23, it effectively acts on the heat dissipation fins 20 and exerts heat dissipation efficiency. In addition, in this embodiment, each heat dissipation fin 20 has a first end 21 and a second end 22, which are arranged opposite to each other. The first end 21 of the heat dissipation fin 20 is adjacent to the flow channel inlet 31 and has a first chamfer structure. The first chamfer structure forms a first angle A1 relative to the horizontal plane of the base plate 10. The angled design of the heat sink fins 20 near the flow channel inlet 31 provides a rectifying effect when airflow enters the heat conduction channel 23 through the flow channel inlet 31. Furthermore, the flow channel inlet 31 and the air outlet 42 have different horizontal heights relative to the base plate 10 from the front end 11 to the rear end 12. The height difference between the area near the flow channel inlet 31 and the area near the air inlet 32 ​​can reach 50%, concentrating the airflow into the fan 40 at the air inlet 32 ​​side. This is further coordinated with the specific proportional variation in the cross-sectional area of ​​the heat conduction channel 23 where the heat sink fins 20 are located. Figures 4 to 6 As shown, it can further increase the concentration effect of the flow field by 20% in performance output.

[0100] Figure 8 for Figure 7 A magnified view of region P. (Reference) Figure 7 Place Figure 8In this embodiment, the impeller 43 has a blade height H3 greater than the height distance H1 between the second plane 35 and the base plate 10. Furthermore, the second end 22 of the heat dissipation fin 20 is adjacent to the air inlet 32 ​​and has a second chamfered structure, forming a second oblique angle A2 relative to the horizontal plane of the base plate 10. In this embodiment, a hub 431 of the impeller 43 has a flow-guiding slope, forming a third oblique angle A3 relative to the horizontal plane of the base plate 10, wherein the third oblique angle A3 is equal to either the first oblique angle A1 or the second oblique angle A2. In this embodiment, the hub 431 of the fan 40 impeller 43 is further designed with a flow-guiding slope in conjunction with the chamfered structure of the heat dissipation fin 20 to further achieve the rectification effect. The guide angles of the first end 21 of the heat dissipation fin 20 near the flow channel inlet 31 and the second end 22 near the air inlet 32, combined with the guide angle of the hub 431 of the impeller 43, can achieve the rectification effect when the flow field enters another area, reducing turbulence energy by 15%.

[0101] Figure 9 This diagram illustrates the dimensional relationships of the components in the heat dissipation assembly of the first embodiment of this case. To accommodate different pressure designs, the air inlet 32 ​​is eccentrically designed to match the center C of the impeller 43. For example, the air inlet 32 ​​is offset along the X-axis relative to the hub 431 and blade 432 of the impeller 43. In this embodiment, the air inlet 32 ​​includes a leading edge 321 and a trailing edge 322, which are respectively positioned relative to the front end 11 and the rear end 12 in the X-axis direction. The center C of the impeller 43 and the trailing edge 322 have a first horizontal distance BD1 in the X-axis direction, and the center of the impeller 43 and the leading edge 321 have a second horizontal distance BD2 in the X-axis direction, wherein the first horizontal distance BD1 is less than 85% of the second horizontal distance BD2. Furthermore, in this embodiment, the center C of the impeller 43 and a tail end 231 of the heat conduction channel 23 have a third horizontal distance BD3 in the X-axis direction, wherein the third horizontal distance BD3 is less than 120% of the first horizontal distance BD1. In this embodiment, the flow channel inlet 31 has a first width W1 in the Y-axis direction, and the air inlet 32 ​​has a second width W2 in the Y-axis direction, wherein the first width W1 is greater than the second width W2. As can be seen from the above, in the heat dissipation assembly 1 of this invention, the air inlet 32 ​​is designed to be eccentrically aligned with the center C of the impeller 43. Simultaneously, the distance from the tail end 231 of the heat guiding channel 23 to the center C of the impeller 43 and the width ratio of the air inlet 32 ​​relative to the heat guiding channel 23 are adjusted to effectively utilize the flow field, thereby increasing efficiency and reducing noise. Of course, this invention is not limited to this.

[0102] Figure 10 This is a front view showing the heat dissipation assembly of the first embodiment of this invention. In this embodiment, the flow channel inlet 31 has a first opening area O1. Figure 11This is a rear view showing the heat dissipation assembly of the first embodiment of this invention. In this embodiment, the air outlet 42 has a second opening area O2. (See reference...) Figure 10 and Figure 11 In this embodiment, the first opening area O1 is larger than the second opening area O2. By adjusting the opening area of ​​the air outlet 42 relative to the flow channel inlet 31, the flow field can be effectively utilized, thereby increasing efficiency and reducing noise.

[0103] Figure 12 This is an exploded view showing the structure of the heat dissipation assembly according to the second embodiment of this invention. In this embodiment, the heat dissipation assembly 1a and... Figures 1 to 11 The heat dissipation assembly 1 shown is similar, and the same component designations represent the same components, structures, and functions, which will not be described again here. In this embodiment, multiple heat dissipation fins 20 also include fins of different extension lengths extending from the front end 11 to the rear end 12, and are spaced apart on the base plate 10 to form a heat conduction channel 23 when the frame 30 is connected to the base plate 10 through the first side wall 30a and the second side wall 30b. The heat dissipation fins 20 in the heat conduction channel 23 are thermally coupled to the heat-generating element (not shown) through the base plate 10 for heat dissipation. The required heat dissipation airflow for the heat dissipation fins 20 is drawn in through the channel inlet 31 by the fan 40, and the airflow passing through the heat dissipation fins 20 is discharged through the air outlet 42 of the fan 40.

[0104] Figure 13 This is an exploded view showing the structure of the heat dissipation assembly of the second embodiment of this invention from another perspective. In this embodiment, the frame 30 also includes a first plane 33, a second plane 35, and a slope 34. The first plane 33 is adjacent to the front end 11 and spatially opposite to the plurality of heat dissipation fins 20. The second plane 35 is adjacent to the rear end 12, and the air inlet 32 ​​is disposed on the second plane 35. The heat conduction channel 23 formed by the combined frame 30 and the base plate 10 connects the channel inlet 31 and the air inlet 32. In addition, the slope 34 connects the first plane 33 and the second plane 35. In this embodiment, the frame 30 includes a guide wall 36a, a first side wall 30a, and a second side wall 30b. The first side wall 30a and the second side wall 30b are arranged opposite to each other and are respectively connected to the two opposite sides of the first plane 33, the inclined surface 34, and the second plane 35. The guide wall 36a is connected to the first side wall 30a of the frame 30, extends along the direction from the front end 11 to the rear end 12, and gradually moves away from the first side wall 30a. The end of the guide wall 36a is more likely to be adjacent to the side edge of the air inlet 32. Of course, this embodiment is not limited to this. Through the connection of the first plane 33, the inclined surface 34, and the second plane 35 and the design of the guide wall 36a, the cross-sectional area of ​​the heat guide channel 23 near the channel inlet 31 is larger than the cross-sectional area of ​​the heat guide channel 23 near the air inlet 32, which helps to generate a channel reduction rectification effect when the airflow passes through the heat guide channel 23.

[0105] Figure 14 This is an exploded view showing the structure of the heat dissipation assembly according to the third embodiment of this invention. In this embodiment, the heat dissipation assembly 1b and... Figures 1 to 11 The heat dissipation assembly 1 shown is similar, and the same component designations represent the same components, structures, and functions, which will not be described again here. In this embodiment, multiple heat dissipation fins 20 include fins of the same extension length extending from the front end 11 to the rear end 12, and are spaced apart on the base plate 10 to form a heat conduction channel 23 when the frame 30 is connected to the base plate 10 through the first side wall 30a and the second side wall 30b. It should be noted that the heat dissipation fins 20 in this case are housed in the heat conduction channel 23 and are located upstream of the air inlet 32 ​​of the fan 40. Therefore, the heat dissipation of the heat dissipation fins 20 in the heat conduction channel 23 is due to the suction airflow of the fan 40 rather than the exhaust airflow. Compared to the traditional fan design with no fins in front of the air intake, this design places the heat dissipation fins 20 in the heat conduction channel 23 upstream of the air intake 32. Under the same fan speed, the heat dissipation performance of the heat dissipation assembly 1 is improved by 15%, while also improving noise quality and reducing noise by 10%.

[0106] Figure 15 This is an exploded view of the heat dissipation assembly of the third embodiment of this invention from another perspective. In this embodiment, the frame 30 includes a first plane 33, a second plane 35, and an inclined surface 34. The first plane 33 is adjacent to the front end 11 and spatially opposite to the multiple heat dissipation fins 20. The second plane 35 is adjacent to the rear end 12. The inclined surface 34 connects the first plane 33 and the second plane 35, and the air inlet 32 ​​is disposed on the second plane 35. Compared with the previous embodiments, in this embodiment, the frame 30 further omits the configuration of the guide walls 36 and 36a. The frame 30 is connected to the base plate 10 through the first side wall 30a and the second side wall 30b. Through the height difference between the first plane 33 and the second plane 35, the cross-sectional area of ​​the heat conduction channel 23 near the channel inlet 31 can also be made larger than the cross-sectional area of ​​the heat conduction channel 23 near the air inlet 32, so as to facilitate the rectification effect of channel reduction when the airflow passes through the heat conduction channel 23. Of course, this invention is not limited to this.

[0107] Figure 16 This is an exploded view showing the structure of the heat dissipation assembly according to the fourth embodiment of this case. In this embodiment, the heat dissipation assembly 1c and... Figures 1 to 11The heat dissipation assembly 1 shown is similar, and the same component designations represent the same components, structures, and functions, which will not be described again here. In this embodiment, multiple heat dissipation fins 20 of equal length are disposed on the base plate 10, arranged at intervals and extending along the direction from the front end 11 to the rear end 12. The impeller 43 is also disposed on the base plate 10 and adjacent to the rear end 12 of the base plate 10. The frame 50 is disposed on the base plate 10 and covers the multiple heat dissipation fins 20 and the impeller 43 respectively. When the frame 50 is assembled with the base plate 10, near the front end 11 of the base plate 10, the frame 50 and the front end 11 of the base plate 10 form a flow channel inlet 31. Near the rear end 12 of the base plate 10, the frame 50 and the rear end 12 of the base plate 10 form an air outlet 42. In this embodiment, the heat dissipation fins 20 are thermally coupled to the heat-generating element (not shown) through the base plate 10 for heat dissipation. The required heat dissipation airflow is drawn in through the flow channel inlet 31 and the airflow passing through the heat dissipation fins 20 is discharged through the air outlet 42.

[0108] Figure 17 To reveal the longitudinal cross-sectional structure of the heat dissipation assembly in the fourth embodiment of this case, in this embodiment, the frame 50 further includes an inner cover 51, on which an air inlet 32 ​​is provided, spatially relative to the impeller 43. When the frame 50 is assembled with the base plate 10, the inner cover 51 of the frame 50 covers the impeller 43, and the heat conduction channel 23 is connected to the air outlet 42 through the air inlet 32. In this embodiment, the heat conduction channel 23 is further divided into two sections, for example, where the heat dissipation fins 20 are located by the base plate 10 and the top plane of the frame 50, while the section adjacent to the air inlet 32 ​​is formed by the inner cover 51 and the top plane of the frame 50. Because the height distance between the bottom plate 10 and the top plane of the frame 50 is greater than the height distance between the inner cover 51 and the top plane of the frame 50, the cross-sectional area of ​​the heat guide channel 23 near the channel inlet 31 can be larger than the cross-sectional area of ​​the heat guide channel 23 near the air inlet 32, which helps to produce a flow channel reduction rectification effect when the airflow passes through the heat guide channel 23. Of course, this invention is not limited to this.

[0109] Figure 18 This is a perspective structural diagram of the heat dissipation assembly according to the fifth embodiment of this case. In this embodiment, the heat dissipation assembly 1d and... Figures 1 to 11The heat dissipation assembly 1 shown is similar, and the same component designations represent the same components, structures, and functions, which will not be described again here. In this embodiment, the heat dissipation assembly 1d consists of a frame 30' and a fan 40. The frame 30' covers an object containing, for example but not limited to, a heat-generating element (not shown), and the frame 30' includes a heat conduction channel 37 and a channel inlet 31. The channel inlet 31 is adjacent to one end of the frame 30', and the heat conduction channel 37 communicates externally through the channel inlet 31. In this embodiment, the frame 30' includes a first plane 33, a second plane 35, and a slope 34'. The first plane 33 is adjacent to the channel inlet 31, and the slope 34' connects the first plane 33 and the second plane 35. The second plane 35 further includes an air inlet 32, and the heat conduction channel 37 communicates between the channel inlet 31 and the air inlet 32. The slope 34' is arc-shaped relative to the air inlet 32. In this embodiment, the cross-sectional area of ​​the heat-conducting channel 37 adjacent to the channel inlet 31 is larger than the cross-sectional area of ​​the heat-conducting channel 37 adjacent to the air inlet 32, which helps to generate a flow channel reduction rectification effect when the airflow passes through the heat-conducting channel 37. In addition, the fan 40 also includes a top cover 41 and an impeller 43. The impeller 43 is placed on the top cover 41. The top cover 41 is spatially opposite to the air inlet 32 ​​and is assembled with the frame 30' to form an air outlet 42. The channel inlet 31 and the heat-conducting channel 37 are connected to the air outlet 42 through the air inlet 32. It is worth noting that in this embodiment, the channel inlet 31 and the air outlet 42 are located on different sides of the frame 30' (including the air inlet 32). The intake airflow through the channel inlet 31 and the heat-conducting channel 37 to the air inlet 32 ​​and the airflow from the air inlet 32 ​​to the air outlet 42 have different horizontal heights. By combining the rectification effect of the heat conduction channel 37 compression channel reduction or the design of many characteristic changes in the aforementioned embodiments, the flow field of the heat dissipation assembly 1d can be effectively utilized, thereby achieving the purpose of increasing efficiency and reducing noise.

[0110] As can be seen from the above, by placing the heat dissipation fins 20 in the heat conduction channel 23 upstream of the air inlet 32 ​​of the fan 40, the heat dissipation of the heat dissipation fins 20 within the heat conduction channel 23 can be improved by the airflow from the fan 40, thereby enhancing heat dissipation efficiency and simultaneously reducing noise and improving sound quality. It should be noted that the compression of the heat conduction channel 23 can be achieved by changing the frame 30, the guide walls 36, 36a, the frame 30', or the frame 50, and the aforementioned technical features can be combined and varied according to actual application requirements. This application is not limited to this and will not be elaborated further.

[0111] In summary, this invention provides a heat dissipation assembly in which a heat dissipation channel formed by heat sink fins is positioned at the air inlet of a centrifugal fan, thereby producing different heat dissipation effects. The heat dissipation of the heat sink fins within the heat dissipation channel is influenced by the intake airflow of the centrifugal fan, rather than the exhaust airflow. The heat dissipation channel connects to the air inlet of the centrifugal fan, and the heat sink fins provide a rectification effect for the intake airflow. Furthermore, by modifying the cross-sectional design of the heat dissipation channel and incorporating related characteristic additive effects, the performance and noise level of the heat dissipation channel are further improved. The frame, heat sink fins, and base plate combine to form the heat dissipation channel, and the end of the heat dissipation channel connects to the fan and exhaust vent at different horizontal levels via an air inlet on the frame. The heat dissipation channel upstream of the air inlet further incorporates the characteristic design of the heat sink fins and channel reduction to achieve a rectification effect. The center of the fan impeller is eccentrically positioned relative to the air inlet, and the fan impeller hub is designed with a chamfered flow guide slope in conjunction with the chamfered structure of the heat sink fins, further enhancing the rectification effect. The heat dissipation fins feature angled guides at the first end near the flow channel inlet and the second end near the air inlet. Combined with the angled guide surface of the impeller hub, this design effectively straightens the flow as it transitions to another region, reducing turbulent energy by 15%. Furthermore, the height difference between the area near the flow channel inlet and the area near the air inlet can reach 50%, concentrating airflow at the fan inlet. This, coupled with a specific proportional variation in the cross-sectional area of ​​the heat dissipation fins' heat channel, further enhances the flow concentration effect, increasing performance output by 20%. On the other hand, to accommodate different pressure designs, the air inlet is eccentrically designed to match the impeller center. Adjustments are made to the distance from the tail end of the heat channel to the impeller center, the width ratio of the air inlet to the heat channel, and the opening area of ​​the outlet relative to the flow channel inlet, all to effectively utilize the flow field and simultaneously increase efficiency and reduce noise. By placing the heat dissipation fins in the heat conduction channel upstream of the air inlet, the heat dissipation performance of the heat dissipation assembly is improved by 15% under the same fan speed conditions, while also improving noise quality and reducing noise by 10%.

[0112] This case may be modified in various ways by those skilled in the art, but all of them shall not deviate from the protection sought in the claims.

Claims

1. A heat dissipation assembly, comprising: The base plate includes the front and back ends that are positioned opposite to each other; Multiple heat dissipation fins are disposed on the base plate, arranged at intervals between each other and extending along the direction from the front end to the rear end; A frame, disposed on the base plate, covers the plurality of heat dissipation fins and is assembled with the base plate to form a heat conduction channel and a channel inlet. The channel inlet is adjacent to the front end, and the heat conduction channel passes through the plurality of heat dissipation fins. The frame includes a first plane, a second plane, and a slope. The first plane is adjacent to the front end and spatially relative to the plurality of heat dissipation fins. The second plane is adjacent to the rear end and has an air inlet. The heat conduction channel connects the channel inlet and the air inlet. The slope connects the first plane and the second plane. The cross-sectional area of ​​the heat conduction channel adjacent to the channel inlet is larger than the cross-sectional area of ​​the heat conduction channel adjacent to the air inlet. A fan includes a top cover and an impeller. The impeller is disposed on the top cover. The top cover is spatially relative to the air inlet and is assembled with the frame to form an air outlet. The flow channel inlet and the heat conduction channel are connected to the air outlet through the air inlet.

2. The heat dissipation assembly according to claim 1, wherein the frame includes a flow guide wall, a first side wall and a second side wall, the first side wall and the second side wall are disposed opposite to each other and respectively connected to two opposite sides of the first plane, wherein the flow guide wall is disposed on the first plane, connects to the first side wall of the frame, extends along the direction from the front end to the rear end and leaves the first side wall to a fixed isolation distance.

3. The heat dissipation assembly according to claim 2, wherein the heat flow channel near the flow channel inlet is formed by the first plane, the first sidewall, the second sidewall and the base plate to form a first cross-sectional area, wherein the heat flow channel through the flow guide wall is formed by the first plane, the flow guide wall, the second sidewall and the base plate to form a second cross-sectional area, wherein the second cross-sectional area is 2 / 3 times the first cross-sectional area.

4. The heat dissipation assembly according to claim 2, wherein the heat guide channel near the channel inlet is formed by the first plane, the first sidewall, the second sidewall and the base plate to form a first cross-sectional area, wherein the heat guide channel near the air inlet is formed by the second plane, the second sidewall, the guide wall and the base plate to form a third cross-sectional area, wherein the third cross-sectional area is 1 / 2 times the first cross-sectional area.

5. The heat dissipation assembly according to claim 1, wherein the height distance between the first plane and the base plate is greater than the height distance between the second plane and the base plate.

6. The heat dissipation assembly according to claim 1, wherein the impeller has a blade height greater than the height distance between the second plane and the base plate.

7. The heat dissipation assembly according to claim 1, wherein each of the heat dissipation fins has a first end and a second end, which are disposed opposite to each other, wherein the first end of the heat dissipation fin is adjacent to the flow channel inlet and has a first chamfer structure, the first chamfer structure forming a first oblique angle relative to the horizontal plane of the base plate, wherein the second end of the heat dissipation fin is adjacent to the air inlet and has a second chamfer structure, the second chamfer structure forming a second oblique angle relative to the horizontal plane of the base plate.

8. The heat dissipation assembly according to claim 7, wherein the impeller hub has a flow guide slope forming a third angle relative to the horizontal plane of the base plate, wherein the third angle is equal to the first angle or the second angle.

9. The heat dissipation assembly according to claim 1, wherein the air inlet includes a leading edge and a trailing edge, respectively relative to the front end and the rear end, the center of the impeller has a first horizontal distance from the trailing edge, and the center of the impeller has a second horizontal distance from the leading edge, wherein the first horizontal distance is less than 85% of the second horizontal distance.

10. The heat dissipation assembly according to claim 9, wherein the center of the impeller has a third horizontal distance from the tail end of the heat conduction channel, wherein the third horizontal distance is less than 120% of the first horizontal distance.

11. The heat dissipation assembly according to claim 1, wherein the flow channel inlet has a first width, the air inlet has a second width, and the first width is greater than the second width.

12. The heat dissipation assembly according to claim 1, wherein the flow channel inlet has a first opening area, the air outlet has a second opening area, and the first opening area is larger than the second opening area.

13. The heat dissipation assembly according to claim 1, wherein the frame includes a flow guide wall, a first side wall and a second side wall, the first side wall and the second side wall are disposed opposite to each other and respectively connected to two opposite sides of the first plane, wherein the flow guide wall connects to the first side wall of the frame, extends along the direction from the front end to the rear end and gradually moves away from the first side wall.

14. The heat dissipation assembly of claim 1, wherein the upper edges of the plurality of heat dissipation fins are adjacent to the first plane, the inclined plane, and the second plane.

15. The heat dissipation assembly according to claim 1, wherein the flow channel inlet and the air outlet are offset in the viewing direction from the front end to the rear end, and have different horizontal heights relative to the base plate.

16. A heat dissipation assembly, comprising: A frame includes a heat conduction channel and a channel inlet. The channel inlet is adjacent to one end of the frame, and the heat conduction channel communicates externally through the channel inlet. The frame includes a first plane, a second plane, and an inclined surface. The first plane is adjacent to the channel inlet, and the inclined surface connects the first plane and the second plane. The second plane has an air inlet. The heat conduction channel communicates between the channel inlet and the air inlet. The cross-sectional area of ​​the heat conduction channel adjacent to the channel inlet is larger than the cross-sectional area of ​​the heat conduction channel adjacent to the air inlet. A fan includes a top cover and an impeller. The impeller is disposed on the top cover. The top cover is spatially relative to the air inlet and is assembled with the frame to form an air outlet. The flow channel inlet and the heat conduction channel are connected to the air outlet through the air inlet.

17. The heat dissipation assembly according to claim 16, wherein the inclined surface is arc-shaped relative to the air inlet.

18. The heat dissipation assembly according to claim 16, wherein the airflow from the flow channel inlet to the air inlet and the airflow from the air inlet to the air outlet have different horizontal heights.

19. The heat dissipation assembly according to claim 16, wherein the flow channel inlet and the air outlet are located on different sides of the frame.

20. The heat dissipation assembly according to claim 16, wherein the flow channel inlet and the air outlet are located on different sides of the air inlet.

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