CN115066139B - Heat dissipation module and electronic equipment - Google Patents

Heat dissipation module and electronic equipment Download PDF

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Publication number
CN115066139B
CN115066139B CN202210010487.6A CN202210010487A CN115066139B CN 115066139 B CN115066139 B CN 115066139B CN 202210010487 A CN202210010487 A CN 202210010487A CN 115066139 B CN115066139 B CN 115066139B
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area
fan
line
air
arc
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CN115066139A (en
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张哲�
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Honor Device Co Ltd
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Honor Device Co Ltd
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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00Constructional details common to different types of electric apparatus
    • H05K7/20Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20009Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
    • H05K7/20136Forced ventilation, e.g. by fans
    • H05K7/20172Fan mounting or fan specifications
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16Constructional details or arrangements
    • G06F1/20Cooling means
    • G06F1/203Cooling means for portable computers, e.g. for laptops
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00Constructional details common to different types of electric apparatus
    • H05K7/20Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20009Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
    • H05K7/20136Forced ventilation, e.g. by fans
    • H05K7/20145Means for directing air flow, e.g. ducts, deflectors, plenum or guides
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00Energy efficient computing, e.g. low power processors, power management or thermal management

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Human Computer Interaction (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The application provides a heat radiation module and electronic equipment, comprising a volute, a fan and a diversion support body; the volute comprises a heat dissipation cavity and an air outlet, the heat dissipation cavity comprises a cavity side wall and a cavity bottom wall, the cavity side wall is arranged at the edge of the cavity bottom wall and is provided with an arc section, the fan is arranged in the heat dissipation cavity, and the flow guide support body is convexly arranged at the cavity bottom wall; the area where the fan is located is a fan area, a first air channel is arranged between the arc section and the fan area, and a second air channel is arranged between the air outlet and the first air channel; the second air duct comprises a first area and a second area, the first area and the second area are arranged along the width direction of the air outlet, the second area is connected with the first air duct, the air flow generated by the rotation of the fan is higher than the flow rate of the partial air flow passing through the first area; the flow guiding support body is positioned in the second area of the second air duct, the length extending direction of the flow guiding support body is intersected with the width direction of the air outlet, and the flow guiding support body is used for dividing the air flow in the second area and guiding the air flow into the first area.

Description

Heat dissipation module and electronic equipment
The present application claims priority from China patent office, application No. 202111470698.X, application name "Heat sink Module and electronic device" filed on day 03, 12, 2021.
Technical Field
The application relates to the technical field of heat dissipation, in particular to a heat dissipation module and electronic equipment.
Background
In a thermal system of an electronic device such as a notebook computer, a heat dissipation module including a fan and a fin radiator is used as a most important heat dissipation portion. For example, in a notebook computer, heat generated by a main heating source is conducted to a volute body and a cooling fin, and then air flow generated by blowing of a fan takes away the heat, so that the aim of reducing the temperature of the computer is fulfilled.
The existing fan radiating module consists of a fan and a radiating fin group, wherein the fan is used for providing air quantity required by radiating, and the fin group is responsible for heat exchange. The higher the flow velocity of the air flowing through the radiating fins is, the higher the heat exchange coefficient of the air and the radiating fins is, the more heat is taken away in unit time, and the better the radiating performance is. Due to the open design of the conventional heat dissipation shell, a high-speed area and a low-speed area exist at the outlet of the heat dissipation shell, the difference is large, and if the flow velocity of the low-speed area is low, the heat exchange efficiency of the fins is further reduced, which leads to the reduction of the heat dissipation performance of the whole module.
Disclosure of Invention
The application provides a heat radiation module, solves the technical problem that the heat radiation performance of whole module reduces because of the great difference of the export air current velocity of heat radiation shell.
The application also provides electronic equipment.
The heat radiation module comprises a volute, a fan and a diversion support body; the volute comprises an air outlet, wherein the heat dissipation cavity is communicated with the air outlet; the heat dissipation cavity comprises a cavity side wall and a cavity bottom wall, the cavity side wall is arranged at the edge of the cavity bottom wall and is provided with an arc section, the fan and the flow guide support body are arranged in the heat dissipation cavity, and the flow guide support body is convexly arranged at the cavity bottom wall;
the area where the fan is located is a fan area, a first air channel is arranged between the arc-shaped section and the fan area, and a second air channel is arranged between the air outlet and the first air channel in a connecting way; the second air duct comprises a first area and a second area, the first area and the second area are arranged along the width direction of the air outlet, the first area and the second area are connected with the first air duct,
the air flow guiding support body is located in the second air duct, the initial end of the air flow guiding support body is located in the second area, the length extending direction of the air flow guiding support body is intersected with the width direction of the air outlet, and the air flow guiding support body is used for dividing air flow in the second area and guiding partial divided air flow to the first area.
The heat conduction support body is arranged in the volute of the heat dissipation module in the embodiment, so that the speed distribution of airflow at the position of the air outlet of the volute can be improved, the airflow velocity exhausted by the air outlet is uniform, and the heat dissipation efficiency of the heat dissipation fin group is improved. For example, the flow speed of the air flow generated by the rotation of the fan is larger than that of the air flow passing through the first area, and the air flow can be split through the flow guiding support body, so that the flow speed of the air flow in the first area is improved, and the flow speed of the air outlet is uniform.
In one embodiment, the heat dissipation chamber includes a chamber top wall connected to the chamber side wall and opposite the chamber bottom wall; the flow guide support is supported between the cavity top wall and the cavity bottom wall. In the example, the diversion support body is adopted to replace a common cylinder to support between the cover plate and the plate body, so that the damage to the fan when the volute is subjected to external pressure is prevented, and the rigidity of the volute can be ensured.
In one embodiment, the flow guiding support body is a plate body, and the cross section of the plate body is in an airfoil shape, a rectangular shape or an arc shape. Specifically, the air flow of arc track that can more adapt to the fan rotation and produce when the guide support body wing section plate body and the arc plate body, the flow direction of the reposition of redundant personnel air current of being convenient for more control.
In one embodiment, the fan region has a first preset angle θ1 and a second preset angle θ2, a straight line passing through a radius of the fan region and a minimum position of the first air duct width is a reference line,
two side lines forming the first preset angle theta 1 are the datum line and a first coordinate line R1 respectively, the length of the first coordinate line R1 meets the condition that R1=K1 is D/2, D is the diameter of a fan area, and the end part of the first coordinate line R1, which is far away from the circle center, is the starting end of the flow guiding support body;
two side lines forming the second preset angle theta 1 are the datum line and a second coordinate line R2 respectively, the length of the second coordinate line R2 meets the requirement that R2=K2 is D/2, D is the radius of a fan area, K2 is larger than K1, and the end part of the second coordinate line R2 far away from the circle center is the tail end of the flow guiding support body. The confirmation of the starting end and the tail end of the diversion support body in the embodiment can better achieve the purpose of diversion and ensure the flow rate of the air flow entering the first area.
In one embodiment, the angle values of the first preset angle θ1 and the second preset angle θ2 are greater than 180 degrees and less than 360 degrees, and the angle of the first preset angle θ1 is less than the angle of the second preset angle θ2.
In one embodiment, K1 and K2 are both greater than 1 and less than 10.
In an embodiment, the first area is provided with a diversion support body, the diversion support body in the first area and the diversion support body in the second area are arranged at intervals, the length extending direction of the diversion support body in the first area is intersected with the width direction of the air outlet, and the diversion support body is used for diverting the air flow in the first area. The flow guiding support body in the first area can further split the air flow in the first area, so that the air flow can uniformly pass through the air outlet, and uniform heat dissipation of the heat dissipation fins is realized.
In one embodiment, the volute further comprises a partition plate, the partition plate is arranged on the bottom wall of the cavity in a protruding mode and located in the first air duct, the partition plate extends along the length direction of the first air duct, and the molded line of the partition plate is spaced from and opposite to the molded line of the arc-shaped section. Along fan direction of rotation, the baffle divides into two sub-channels with first wind channel part, divides the amount of wind that constantly accumulates in first wind channel with the rotatory in-process of fan, can avoid the air current to constantly accumulate in first wind channel and produce the velocity of flow too big, the uneven problem of heat dissipation, promotes the homogeneity of the velocity of flow of the air current in the first wind channel, avoids increasing the regional velocity of flow when getting into the second wind channel, can make the velocity of flow of air outlet divide more evenly.
In one embodiment, the molded line of the partition board is an arc line, or a plurality of arcs with different curvatures are sequentially connected, or a bezier curve, or a non-closed spline curve. The spiral case is equivalent to a case that a part of the partition board is the same as or similar to the molded line of the side wall, so that the air outlet is ensured to be smooth and the uniformity is improved.
In one embodiment, the arcuate segments comprise a first arcuate segment and a second arcuate segment, and the profile of the separator has the same curvature as the profile of the second arcuate segment. In this embodiment, the molded line of the partition plate is the same as the molded line of the arc section, so that the partition plate, the fan area and the second air duct of the volute form a double-volute structure, and the air outlet uniformity is improved. In one embodiment, the width of the first air duct gradually increases along the rotation direction of the fan, and the first arc-shaped section and the second arc-shaped section are arranged along the rotation direction of the fan. The direction that the width of first wind channel grow also is the flow direction of air current, avoids the air quantity that accumulates in the rotatory in-process of fan and the velocity of flow that leads to too big and dispel the heat uneven, can promote the homogeneity of the velocity of flow of the air current in the first wind channel, and then improves air outlet velocity of flow homogeneity.
Further, the width of the sub-air duct between the molded line of the partition plate and the fan area is the same as the width between the second arc-shaped section and the fan area. The molded line of the second arc section can be directly selected when the partition plate is designed, and the flow smoothness of the air flow of the sub-air duct can be improved.
In one embodiment, the fan area has a third preset angle θ3 and a fourth preset angle θ4, where an angle of θ4 is k5×θ3, and K5 is greater than 1 and less than 5; a straight line passing through the radius of the fan area and the minimum position of the width of the first air duct is taken as a datum line,
two side lines forming the third preset angle theta 3 are the datum line and a third dividing line respectively, two side lines forming the fourth preset angle theta 4 are the datum line and a fourth dividing line respectively,
the start end of the partition is located on a line connecting the third dividing line with the fan region and the chamber sidewall, and the end of the partition is located on a line connecting the fourth dividing line with the fan region and the chamber sidewall. The air flow in the first air channel is continuously accumulated to generate overlarge flow velocity, and the air flow is split by properly setting the position of the partition plate, so that the uniform flow velocity can be achieved, and the purpose of uniform heat dissipation is further realized.
In one embodiment, a third coordinate line R3 is determined on the third dividing line, the length of the first coordinate line R3 satisfies r3=k1×d/2, D is the diameter of the fan area, and the end of the first coordinate line R3 away from the center of the circle is the starting end of the partition board;
And determining a fourth coordinate line R4 on the third dividing line, wherein the length of the fourth coordinate line R4 meets the condition that R4 = K4 x R3, K4 is larger than K1, and the end part of the fourth coordinate line R4 far away from the circle center is the tail end of the partition plate.
In one embodiment, the third preset angle θ3 is greater than 30 degrees and less than 180 degrees; k3 is greater than 1 and less than 2, and K4 is greater than 1 and less than 2.
In one embodiment, the arc section and the fan area are two walls of the air duct, the first air duct has a preset width value, a port is arranged between the first air duct and the second air duct, and a straight line where the port is located passes through the radius of the fan area; the starting end of the partition board is positioned at the position where the width of the air duct is equal to the preset width value, and the tail end of the partition board is positioned at the position where the port is positioned. The positions of the starting end and the tail end of the partition plate in the width direction of the first air duct are not limited, so that the processing is convenient, and the flow distribution is realized.
In one embodiment, the cavity side wall comprises two opposite first plate sections and second plate sections connected by the arc-shaped section, the first plate sections and the second plate sections are respectively positioned at two opposite sides of the width direction of the air outlet,
The arc section comprises a first arc-shaped plate and a second arc-shaped plate which are connected, and the molded line of the first arc-shaped section in the length direction is a circular arc line or is formed by connecting a plurality of arcs with different curvatures; the molded lines of the second arc section in the length direction are arc lines or arc connection of a plurality of different curvatures. The arc design of the arc section of the volute is beneficial to the consistency of the air outlet direction of each position when the fan rotates.
In one embodiment, the heat dissipation module further comprises a heat conducting member, and the heat conducting member is connected to the outer surface of the volute. The heat conducting piece is used for transferring external heat to the volute to dissipate heat.
In one embodiment, the heat dissipation module further includes a heat dissipation fin set, and the heat dissipation fin set is disposed outside the volute and connected with the air outlet. The radiating fin group is used for radiating heat discharged from the volute.
The electronic equipment provided by the application comprises a main body and the heat radiation module, wherein the heat radiation module is assembled in the main body, and the heat radiation fin group is exposed out of the main body. The application adopts the heat radiation module, and can realize uniform heat radiation.
In summary, the heat dissipation module of the present application sets the flow guiding support body in the heat dissipation shell to support between the cover plate and the plate body, so as to prevent the fan from being damaged when the volute is subjected to external pressure, and ensure the rigidity of the volute; the speed distribution of the airflow at the air outlet of the volute can be improved, so that the airflow exhausted from the air outlet is uniform in flow speed, the heat dissipation efficiency of the heat dissipation fin group is improved, and the heat dissipation efficiency of electronic equipment is further improved.
Drawings
In order to more clearly describe the technical solutions in the embodiments or the background of the present application, the following description will describe the drawings that are required to be used in the embodiments or the background of the present application.
Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application;
FIG. 2 is a schematic diagram of the heat dissipation module shown in FIG. 1;
FIG. 3 is a schematic view of the heat dissipating module shown in FIG. 2 with a cover removed;
FIG. 4 is a schematic top view of the heat dissipating module shown in FIG. 3;
FIGS. 5 and 6 are schematic views of the deflector support body position forming process shown in FIG. 3;
FIG. 7 is a schematic view of the heat dissipating module shown in FIG. 3 with a plurality of flow guiding supports;
FIG. 8 is a velocity profile of an air outlet of a heat sink module of the present application with a deflector support;
fig. 9 and 10 are schematic views of the separator position forming process shown in fig. 3.
Detailed Description
Referring to fig. 1, fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application. The electronic device may be an electronic device that needs to dissipate heat inside, such as an integrated desktop computer or a notebook computer. The embodiment of the present application will be described with reference to the notebook computer 200.
The notebook computer 200 includes a main body 210, a display screen rotatably mounted on the main body 210, and a heat dissipation module 100 disposed inside the main body 210. The main body 210 includes a housing, and electronic components and related structural members for implementing computer functions, such as a processor and a circuit board, which are installed inside the housing, and the processor and the circuit board are components with relatively high heat. The shell is provided with a heat dissipation air port for being communicated with the outside, and heat in the notebook computer 200 is dissipated through the heat dissipation air port by the heat dissipation module.
The heat dissipation module described in the present application is described in detail below with reference to specific embodiments.
Referring to fig. 2 and 3 together, fig. 2 is a schematic structural diagram of the heat dissipation module shown in fig. 1, wherein the fin group 70 is shown and only the outline is shown; FIG. 3 is a schematic view of the heat dissipating module shown in FIG. 2 with a cover removed; the heat dissipation module 100 includes a scroll casing 10, a fan 20 installed in the scroll casing 10, a guide support 30 installed in the scroll casing 10, and a heat dissipation fin group 70. The volute 10 includes a plate 14, a sidewall 15, and a cover 16. The volute 10 comprises a heat dissipation cavity 11 and an air outlet 12 communicated with the heat dissipation cavity 11. The fan 20 and the guide support 30 are located in the heat dissipation cavity 11, the guide support 30 is protruding on the wall of the heat dissipation cavity, and the guide support 30 is used for supporting between the side wall 15 and the cover plate 16. The air outlet 12 is located at one side of the volute 10 for the hot air in the heat dissipation chamber 11 to flow out. The heat dissipation fin group 70 is located at the air outlet 12 and is used for cooling and dissipating the hot air coming out of the heat dissipation cavity 11. The diversion support body 30 prevents the fan 20 from being damaged when the volute 10 is subjected to external pressure, and can ensure the rigidity of the volute; the speed distribution of the airflow at the air outlet 12 of the volute 10 can be improved, and the heat dissipation efficiency of the heat dissipation fin group can be improved.
In this embodiment, the side wall 15 of the volute is protruded on the plate 14 to form a body, the cover plate 16 covers the side wall and is opposite to the plate 14 at a distance, and the body and the cover plate 16 form the heat dissipation cavity 11 and the air outlet 12. The side surface of the side wall 15 facing the heat dissipation cavity 11 is the cavity side wall of the heat dissipation cavity 11, and the surface of the plate body 14 facing the heat dissipation cavity 11 is the cavity bottom wall; the surface of the cover plate 16 facing the heat dissipation cavity is a cavity top wall, and the diversion support body 30 is arranged on the cavity bottom wall in a protruding mode and supported between the cavity top wall and the cavity bottom wall. The scroll casing 10 of the present embodiment is in the shape of a scroll casing as a whole, and has a heat dissipation chamber 11 having a scroll casing contour and a side wall 15 extending in a scroll casing line.
The heat dissipation cavity 11 of the volute 10 comprises a fan installation area, a fan air inlet (not shown) is formed in the plate body 14, and a cover plate 16 covered on the body is provided with the fan air inlet (not shown) corresponding to the fan air inlet; the fan air inlet and the fan air inlet of the plate body 14 correspond to the fan installation area. In the fan displacement fan installation area, when the fan 20 rotates, external air flows into the volute 10 through the fan air inlet of the plate body 14 and the fan air inlet. The fan 20 of the present embodiment includes a fan shaft 21 and a plurality of fan blades 22, wherein the plurality of fan blades 22 are uniformly spaced around the fan shaft 21, and gaps between every two adjacent fan blades 22 are flow channels (not shown), and the plurality of fan blades 22 are uniformly spaced to ensure that the flow channel spacing between every two adjacent fan blades 22 is the same. One end of each fan blade 22 is connected with the fan shaft, the other end is a free end, and a wind gap of a flow channel is arranged between the free ends of every two adjacent fan blades and is used for flowing out the air flow in the flow channel.
The ends of the plurality of fan blades 22 remote from the fan shaft 21 form a circular outline when rotating around the fan shaft 21. The fan blades 22 are uniformly arranged around the fan shaft 21 to ensure that the air output of the flow channels between every two fan blades is the same when the fan blades rotate, that is, the air output of the fan 20 blown out of the fan through each flow channel is the same and uniform when the fan rotates. The fan 20 is installed in the heat dissipation cavity 11, the plate body 14 is connected by the fan shaft 21, the axis of the fan shaft 21 of the fan 20 is perpendicular to the plate body 14, and the fan blades 22 and the side walls 15 are arranged at intervals, i.e. the interval distance between the fan blades 22 and the side walls 15 is required to ensure the passing of air flow and the safety distance between the fan and the heat dissipation module when the fan rotates.
Referring to fig. 4 together, fig. 4 is a schematic top view of the heat dissipation module shown in fig. 3. Specifically, the plate 14 includes an inner surface 141 (cavity bottom wall) and an end edge 142; the end edge 142 is an edge of the plate 14 extending in a straight line, and may be understood as a side edge of the inner surface 141. The length direction of the end edge 142 is the width direction of the heat dissipation module 100, and is also the width direction of the air outlet. The sidewall 15 includes a first end 151 and a second end 152. The side wall 15 is convexly arranged on the inner surface 141 and extends along part of the edge of the inner surface 141, the first end 151 of the side wall 15 is positioned at one end of the end edge 142, and the second end 152 is positioned at the other end of the end edge 142; an opening is formed between the first and second ends 151, 152 of the side wall 15, with the end edge 142 being located at the opening. It will be appreciated that the side wall 15 is a strip of sheet material, the sides of which are attached to the inner surface, extending from one end of the end edge 142 along the edge of the inner surface to the other end of the end edge 142. The outline of the cover plate 16 is the same as that of the plate body 14, the cover plate 16 covers the side wall 15, the heat dissipation cavity 11 is formed among the cover plate 16, the side wall 15 and the plate body 14, and the air outlet 12 is formed at the opening position. It is also understood that the side walls 15 are disposed around the edges of the inner surface of the plate 14, said ventilation openings being provided in the side walls 15. The end edge 142 is an edge surrounding the air outlet 12. The length square of the end edge 142 is the width direction of the air outlet 12.
For convenience of description, a width direction of the scroll case 10 (a direction parallel to the end edge 142, that is, a width direction of the air outlet 12) is defined as an X-axis direction, a length direction of the scroll case 10 (a direction perpendicular to the end edge 142, that is, a direction perpendicular to a plane in which the air outlet is located) is defined as a Y-axis direction, and a thickness direction of the scroll case 10 is defined as a Z-axis direction; the X-axis direction, the Y-axis direction and the Z-axis direction are perpendicular to each other. The parallel values described below allow a certain tolerance range, and the values of the diameter value, the radius value, the pitch value, and the like described below allow a certain tolerance range.
The heat dissipation module 100 is further provided with a heat conducting member (not shown), which is mounted on the outside of the scroll casing 10, specifically on the outer surface of the plate 14 opposite to the inner surface 141, and is used for contacting with a heating element of the notebook computer to transfer the heat in the notebook computer 200 to the scroll casing 10, the scroll casing 10 and a flow guiding support body disposed in the scroll casing 10 receive the heat transferred by the heat conducting member, and the air flow generated by the fan 20 carries away the heat to dissipate the heat, so as to achieve the purpose of dissipating the heat of the computer. Specifically, the heat conducting member may be a metal plate or a metal tube, and is directly connected to electronic components with larger heat productivity, such as a processor and a circuit board of the notebook computer. In other embodiments, the heat conducting member is disposed along the outer peripheral surface of the side wall 15, that is, the outer surface of the side wall 15 facing away from the heat dissipation chamber 11.
Referring to fig. 4 together, fig. 4 is a schematic top view of the heat dissipation module shown in fig. 3; in this embodiment, the side wall 15 is a thin plate with a volute line extending, and includes a first flat plate section 153, a first arc section 154, a second arc section 155, an arc connection section 159 and a second flat plate section 156, where the first flat plate section 153, the first arc section 154, the second arc section 155, the arc connection section 159 and the second flat plate section 156 are sequentially connected to enclose the shape of the volute 10, and the contour of the side wall 15 can be understood as the line of the volute 10. The first arc-shaped section 154, the second arc-shaped section 155 and the arc-shaped connecting section 159 are arc-shaped plate bodies, and the first flat plate section 153 and the second flat plate section 156 are rectangular plate bodies. Along the width direction of the scroll casing 10, the first flat plate section 153 is disposed opposite to the second arc section 155 and the second flat plate section 156 connected by the arc connection section 159, and the first flat plate section 153 and the second flat plate section 156 are located at opposite sides of the air outlet 12. Along the length of the volute 10, the first arcuate segment 154 is opposite the air outlet 12. In other embodiments, the side walls 15 may be flat or arc-shaped, as determined by the application.
In this embodiment, the side wall 15 is disposed perpendicular to the inner surface 141, that is, the first flat plate 153, the first arc 154, the second arc 155, the arc connecting 159 and the second flat plate 156 are perpendicular to the inner surface 141. The first flat plate 153, the first arc 154, the second arc 155, the arc connecting 159 and the second flat plate 156 are thin plates with uniform thickness. Wherein, the first arc-shaped section 154 and the second arc-shaped section 155 are connected to form an arc-shaped section. The thickness dimensions of the first flat plate 153, the first arc 154, the second arc 155, the arc connecting 159 and the second flat plate 156 refer to the X-axis dimension. It will be appreciated that the first plate segment 153, the first arcuate segment 154, the second arcuate segment 155, the arcuate connecting segment 159 and the second plate segment 156 may be of uniform thickness or may be of different thickness from one another, but each segment may be of uniform thickness. The first flat plate 153, the first arc 154, the second arc 155, the arc connecting 159 and the second flat plate 156 may be formed directly by in-mold integral molding, or may be formed by forming the first flat plate 153, the first arc 154, the second arc 155, the arc connecting 159 and the second flat plate 156 and then connecting them. In other embodiments, the side wall 15 may be a plate having a non-uniform thickness.
The thickness of the side wall 15 in this embodiment is uniformly set, and for convenience of description, the scroll casing 10 and the fan 20 are both shown in the form of lines in the plan view of fig. 4, and the outline of the scroll casing 10 is collectively called a molded line; such as the profile of the side wall 15, i.e., the profile of the first plate section 153, the first arcuate section 154, the second arcuate section 155, the arcuate connecting section 159, and the second plate section 156. Of course, the lines of the side wall 15 shown in the drawings may be the lines of the respective molded lines of the first flat plate section 153, the first arc section 154, the second arc section 155, the arc connecting section 159 and the second flat plate section 156. In the case of inconsistent thickness of the side wall 15, the molded line is a side contour line of the side wall 15 facing the side wall surface of the heat dissipation cavity 11. It should be noted that the first arc-shaped section 154 and the second arc-shaped section 155 form the arc-shaped sections.
For the description of the molded lines, taking the first flat plate segment 153 as an example, the molded line of the first flat plate segment 153 is a line extending along the length direction thereof and passing through the center position of the first flat plate segment 153 (also the center line forming the overall contour of the first flat plate segment 153), and the width and the thickness of the first flat plate segment 153 are both symmetrical lines with the molded line; and in the length direction of the first flat plate segment, the outline of the orthographic projection of the first flat plate segment 153 on the plate body 14 is parallel to the molded line, and the bending direction and the curvature are the same. The first plate section 153 actually has two sides extending in a longitudinal direction. One side face faces the heat dissipation cavity, the other side face faces the outside of the volute, the two side faces are arc-shaped faces, and the tangent plane where the molded line is located is parallel to the two side faces and the arc-shaped curvature and the bending direction are completely consistent. The molded lines of the diversion support, the first arc-shaped section 154, the second arc-shaped section 155, the arc-shaped connecting section 159 and the second flat plate section 156 are defined completely the same as the molded lines of the first flat plate section 153. The shape of the molded line described later can represent the shape of the diversion support or the side wall corresponding to the molded line.
The first arc-shaped section 154 and the second arc-shaped section 155 are arc-shaped plate bodies, and the first arc-shaped section 154 is smoothly connected with the second arc-shaped section 155. The molded lines of the first arc-shaped section 154 and the second arc-shaped section 155 in the length direction are arc lines, or the molded lines of the first arc-shaped section 154 and the second arc-shaped section 155 are arc-shaped connections with a plurality of different curvatures. In this embodiment, the lines of the first arc-shaped section 154 and the second arc-shaped section 155 in the length direction are bezier curves. Of course, the contour lines of the first arc-shaped section 154 and the second arc-shaped section 155 in the length direction may be formed by sequentially connecting a plurality of arcs, and the arc bending directions of the first arc-shaped section 154 and the second arc-shaped section 155 face the fan. The center of one or more arcs forming the line of the first arc segment 154 and the second arc segment 155 in this embodiment is located within the fan zone 20A.
The first flat plate 153 is a rectangular plate body, and is smoothly connected to one end of the first arc-shaped section 154 far away from the second arc-shaped section 155, and one end of the first flat plate 153 far away from the first arc-shaped section 154 is a first end 151. The second plate section 156 is a rectangular plate body, and is connected to an end of the second arc section 155 away from the first arc section 154, and an end of the second plate section 156 located at the air outlet 12 is the second end 152. The second flat plate section 156 and the second arc section 155 in this embodiment are connected through the arc connection section 159, and the second flat plate section 156 and the second arc section 155 are connected through the arc connection section 159 to realize smooth transition, so that the outline of the whole side wall 15 is smooth, and the air flow in the heat dissipation cavity 11 is smooth.
The arcuate bending direction of the arcuate connecting section 159 faces away from the wind sector and the profile of the arcuate connecting section 159 may be an arc with only one curvature. It will be appreciated that the arcuate connecting section 159 is formed by chamfering the junction of the second planar section 156 and the second arcuate section 155. It is also understood that the arcuate connecting section 159 is an extension of the second plate section 156. In other embodiments, the second plate segment 156 is directly angled with respect to the second arcuate segment 155.
Referring to fig. 4 together, the area where the fan 20 is located is designated as a fan area 20A, and it can be understood that the fan area has the same contour and volume as the fan 20, i.e. the fan area 20A corresponds to the perspective projection of the fan 20 and is completely overlapped with the fan 20. The outer contour of the fan area 20A is also embodied in the form of a line, in particular a circle. When the fan blade 22 rotates, the end of the fan blade 22 away from the center O forms a circular surface with the center of the fan 20 as the center O, and the circular surface is the outer contour surface of the fan area 20A. The distance from the fan region 20A to the side wall or the partition 40 described below refers to the distance from the outer contour surface of the fan region 20A to the side wall 15 or the partition 40.
The plane where the two radii of the fan area 20A are connected by an included angle is taken as an interface F, the interface F passes through the center O of the fan area 20A, and the interface F is actually a dummy plane and is shown in a line form in the figure. The interface F divides the fan area 20A into a first fan area 201A (a portion corresponding to the angle A1 in fig. 4) and a second fan area 201B (a portion corresponding to the angle A2 in fig. 4). Along the length direction of the volute 10, i.e., the Y-axis direction, the second fan region 201B is adjacent to the air outlet 12; the first fan region 201A is spaced opposite the first arcuate segment 154 and the second arcuate segment 155. Along the width direction of the scroll casing 10, i.e., the X-axis direction, the first flat plate section 153 and the second flat plate section 156 (including the arc-shaped connecting section 159) are located on opposite sides of the second fan region 201B. The centers of the first arc-shaped section 154 and the second arc-shaped section 155 are located on the diameter passing through the interface F and are spaced from the center O. It should be noted that, the included angle A1 is an included angle of two connecting lines passing through the center of the circle with the connection point of the first flat plate section 153 and the first arc section 154 as a starting point and the connection point of the second arc section 155 and the arc connection section 159 as an ending point; the sum of the included angle A2 and the included angle A1 is 360 degrees, that is, the boundary surface F passes through the start point and the end point.
In this embodiment, the fan area 20A is located in the heat dissipation chamber 11, and gaps are formed between the side wall 15 and the air outlet 12, and the gaps can be understood as air channels. The duct communicates with the air outlet 12. The overall profile of the duct of this embodiment may be understood as a volute, which is actually disposed about the fan area 20A. The gap between the first fan region 201A and the first and second arcuate segments 154 and 155 is the first air path 50. The area between the second fan area 201B and the first flat plate section 153, the second flat plate section 156 (including the arc-shaped connecting section 159) and the air outlet 12 is a second air duct 60, and the second air duct 60 is communicated with the air outlet 12; the width direction of the scroll casing 10 is the longitudinal direction of the second air duct 60, and the length direction of the scroll casing 10 is the width direction of the second air duct 60.
In this embodiment, the two ports of the first air duct 50 are the first port 51 and the second port 52, respectively, and the first port 51 is located at the connection between the second arc-shaped section 155 and the arc-shaped connection section 159, that is, the position between the interface F and the connection between the second arc-shaped section 155 and the arc-shaped connection section 159 through the fan area 20A. The second port 52 is located where the first plate segment 153 joins the first arcuate segment 154; i.e., interface F, passes through fan region 20A to a location between the junction of first plate segment 153 and first arcuate segment 154. The first air duct 50 communicates with the second air duct 60 through the first port 51 and the second port 52. Along the width direction of the fan 20, the length direction of the second air duct 60 is the length direction of the fan 20, and the length direction of the fan 20 is the width direction of the second air duct 60. It will be appreciated that a first air duct 50 is provided between the arcuate segment and the fan region 20A, and a second air duct 60 is provided between the air outlet 12 and the first air duct 50.
In one embodiment, the width of the first port 51 is smaller than the width of the second port 52 along the radial direction (the diameter direction with the circle center O as the circle center) of the air sector 20A, and the width of the first air duct 50 gradually increases along the direction from the first port 51 to the second port 52, i.e., the length direction (clockwise direction ω) of the first air duct 50. In this embodiment, the clockwise rotation of the fan will be described as an example. After the fan 20 is started, the fan blades rotate clockwise, the air flow generated at the first port 51 flows along the first air channel 50 to the second port, and in the first air channel 50 between the first port 51 and the second port 52, because the air flow is generated at the same time by the fan blades 22, the air flow is continuously overlapped from the first port 51 to the second port 52, the width of the first air channel 50 is gradually increased along the length direction of the first air channel 50, and the uniformity of the air flow velocity can be controlled under the premise that the air flow is continuously increased in the process of flowing through the first air channel 50.
Referring to fig. 4, the flow guiding support 30 is disposed in the second air duct 60, and the second air duct 60 is communicated with the air outlet 12. Specifically, the second air duct 60 includes a first area 60A and a second area 60B, the first area 60A and the second area are arranged along the width direction of the air outlet, and the first area 60A and the second area 60B are connected with the first air duct 50. The width direction of the air outlet 12 refers to the X-axis direction, and a third area (not shown) is further disposed on the other side of the first area 60A, and the third area, the first area 60A and the second area 60B are arranged and communicated at a time along the width direction of the air outlet 12, and the third area corresponds to and communicates with the first port 51 of the first air duct 50, and the second area 60B corresponds to and communicates with the second port 52 of the first air duct 50.
As shown in fig. 4, the first area 60A and the second area 60B are divided by a boundary F2, the line of the boundary F2 is arc-shaped, the initial end of the line of the boundary F2 is located at the intersection point of the boundary F and the fan area 20A and is located at the second port 52 of the first air duct 50, the line of the boundary F2 and the air outlet 12 (end edge 142) have an intersection point, and the intersection point is the end of the line of the boundary F2, wherein, for convenience of distinction, the line of the boundary F2 is shown as having a portion extending the air outlet 12.
Based on the above-described division, it is actually intended to form the first region 60A and the second region 60B of different flow rates at both sides of the split surface F2 in the second air duct 60; due to the profile and positioning of the scroll casing 10, the first duct 50 and the second duct 60, the first region 60A airflow rate will be greater than the second region 60B airflow rate. While the third region is located on the other side of the first region 60A, and the airflow velocity is different from the first region 60A and is greater than the flow velocity of the first region 60A, it will be understood that the two sides of the interface F2 form regions with different flow velocities, excluding the third region.
In other embodiments, the ratio of the first area 60A to the second area 60B may be divided according to the measured actual airflow velocity of the second air duct 60 located at the two sides of the intersection point of the end edges 142 of the interface F2, where the actual airflow velocity of the first area 60A is greater than the actual airflow velocity of the second area 60B.
The shape of the interface F2 is set according to the direction of airflow from the second port 52 of the first air duct 50 into the second air duct and the direction (arc) of airflow generated by the fan blades of the second area fan 20 near the second port, mainly to adapt to the direction of the superimposed air volumes of the first air duct 50 and the second air duct 60.
Of course, the line of the interface F2 may be a straight line, where the initial end of the line of the interface F2 is located at the intersection point of the interface F and the fan area 20A and located at the second port 52 of the first air duct 50, and the line of the interface F2 has an intersection point with the air outlet 12 (the end edge 142), and the intersection point is the end of the line of the interface F2. The first region 60A and the second region 60B located on both sides of the interface F2 where the line is straight have different flow rates. The interface F2 is only a schematic boundary. Similarly, the dividing line between the third region and the first region 60A is also divided, and the airflow velocity of the third region is generally greater than that of the first region 60A and directly flows out of the air outlet.
The flow guiding support body is located in the second air duct, the initial end of the flow guiding support body is located in the second area 60B, the length extending direction of the flow guiding support body 30 intersects with the width direction of the air outlet 12 (X-axis direction), and the flow guiding support body 30 is configured to split the air flow in the second area 60B and guide a part of the split air flow to the first area 60A.
The airflow flow in the second area 60B includes the airflow flow generated by the fan 20 and the airflow flow flowing into the second area from the second port 52 of the first air duct 50, and the airflow flowing from the first air duct 50 through the second port 52 and the airflow generated by the fan at the position of the second air duct 60 can be split by the flow guide support 30, so as to balance the airflow velocity in the width direction of the air outlet 12, avoid the airflow velocity in the width direction of the air outlet 12, and avoid the lower airflow velocity in the area (the first area 60A) located in the approximately middle part of the second air duct 60, so as to avoid the lower airflow velocity in the area, and avoid the heat dissipation efficiency of the heat dissipation fins corresponding to the area, that is, improve the heat dissipation effect of the heat dissipation fins corresponding to the area.
In this embodiment, the flow guiding support body 30 is a wing-shaped plate, wherein the cross-sectional shape of the flow guiding support body 30 is: airfoil shapes, such as low speed airfoils: NACA-4, NACA-6 series airfoils, and the like. In other embodiments, the flow guiding support 30 may be an arc-shaped plate or a flat plate, and the cross-sectional shape of the corresponding plate body is rectangular or arc-shaped. The diversion support 30 can be made of plastic material, so as to avoid excessively increasing the weight of the heat dissipation module. Of course, the flow guiding support body 30 may be made of metal material such as aluminum, so as to realize the flow guiding and supporting functions and assist the heat conducting function.
The flow guiding support 30 includes a first flow guiding surface 301 and a second flow guiding surface 302, where the first flow guiding surface 301 and the second flow guiding surface 302 are disposed opposite to each other, the first flow guiding surface 301 faces the fan 20, and the second flow guiding surface 302 faces the first flat plate 153. The first and second guide surfaces 301 and 302 perform an air flow guiding function. The diversion support 30 further includes a start end 31 and an end 32, where the start end 31 and the end 32 are both connected to the first diversion surface 301 and the second diversion surface 302. In this embodiment, the flow guiding support 30 is located approximately at the position of the second region 60B near the first region 60A; both the start 31 and end 32 of the deflector support 30 are located within the second region 60B. In this embodiment, the flow guiding support 30 is an airfoil plate, and the first flow guiding surface 301 and the second flow guiding surface 302 are arc surfaces, so that the flow direction of the air flow generated by the rotation of the fan 20 is more suitable, and the air flow is smooth.
In other embodiments, the initial end 31 of the flow guiding support 30 is located in the second area 60B, the final end 32 is located in the first area 60A, and the air flow overlapped by the first air duct 50 and the second air duct 60 is split when passing through the initial end 31 and enters the first area 60A along the extending direction of the length of the flow guiding support 30, so that the direction of the air flow entering the first area 60A can be adjusted, and the flow guiding and heat dissipation can be more targeted.
In this embodiment, the length extending direction of the flow guiding support 30 intersects with the width direction of the air outlet 12 (X-axis direction), that is, the flow guiding support 30 is inclined compared with the air outlet 12 (end edge 142), so as to generate an inclined sub-channel, which is easy to split the air volume of the second area 60B to the first area 60A of the second air duct. The length of the guide support body extends in a direction of a straight line shown as 303, which passes through the guide support body 30 and connects the start end 31 and the end 32.
Referring to fig. 5 and 6 together, fig. 5 and 6 are schematic views illustrating a process of setting the position of the guide support shown in fig. 3; taking a diversion support 30 as an example, the positions of the start end 31 and the end 32 of the diversion support 30 are described, wherein the end 32 is close to the air outlet 12, and the length extending direction of the diversion support 30 is intersected with the width direction of the air outlet 12, that is, the diversion support 30 forms an inclined angle with the air outlet 12, that is, forms an inclined angle with the end edge 142; the inclination angle of the flow guiding support body 30 is greater than or equal to 90 degrees compared with the inclination angle of the air outlet 12 (the end edge 142).
The fan area has a first preset angle θ1 and a second preset angle θ2, where the air volume flowing from the first air duct 50 through the second port 52 is overlapped with the air volume generated by the fan 20 in the second area 60B of the second air duct 60, so that the air volume and the air flow rate at the positions where the two sides of the second air duct 60 are located are increased, and the values of the first preset angle θ1 and the second preset angle θ2 can be determined according to the ratio of the air flow rates of the second area 60B and the first area 60A after the fan rotates at the same rotation speed in the unit area.
In the first air duct 50 and the second air duct 60, at the connection position of the second plate section 156 (the arc connection section 159) and the second arc section, that is, at the position where the first port 51 is the position where the width of the first air duct 50 is the smallest, that is, the position where the distance between the side wall 15 and the fan region 20A is the smallest, a straight line passing through the radius and the connection position (the first port 51) of the second plate section 156 (the arc connection section 159) and the second arc section 155 is defined as a reference line F1, the reference line is located on the interface F, then the center O of the fan region 20A is used as a starting point, the straight line passing through the radius is used as a first dividing line r1, the included angle between the first dividing line r1 and the reference line F1 is a first preset angle θ1, and the value of the first preset angle θ1 is 180 degrees to 360 degrees. In this embodiment, the value of the first preset angle θ1 is selected to be 210 degrees. It will be appreciated that the position of the first dividing line r1 is actually determined based on the first preset angle θ1.
The first dividing line r1 has an intersection point 1 with the fan region 20A, the first dividing line r1 has an intersection point 2 with the first plate segment 153, and the start end 31 of the molded line of the deflector support body 30 is located between the intersection point 1 and the intersection point 2. The connection line between the starting end 31 of the molded line of the diversion support body 30 and the circle center O is the end of the first coordinate line R1, where R1 is located on the first dividing line R1, that is, the end between the intersection point 1 and the intersection point 2 is the starting end 31, and the length of R1 satisfies r1=k1×d/2, where K1 is greater than 1 and less than 10. In this embodiment, K1 has a value of 2 and d is the diameter of the fan area. It will be appreciated that, in practice, the specific position of the start end 31 may be determined according to the ratio of the air volume passing between the start end 31 and the fan area 20A and the side wall, and after the intersection points 1 and 2 are confirmed, the position of the start end 31 at the line connecting the intersection points 1 and 2 may be determined directly according to the ratio without needing to do R1.
The end 32 of the molded line of the flow guiding support body 30 is defined according to a second preset angle θ2 and a second coordinate line R2, specifically, the center O of the fan area 20A is taken as a starting point, a straight line passing through a radius is taken as a second boundary line R2, the included angle between the second boundary line R2 and the reference line F1 is the second preset angle θ2, θ2 is greater than θ1, and the value of the second preset angle θ2 is 180 degrees to 360 degrees. In this embodiment, the second preset angle θ2 is selected to be 270 degrees.
The second boundary line r2 has an intersection point 3 with the fan region 20A, and the second boundary line r2 has an intersection point 4 with the first plate segment 153 or the outlet location, with the end 32 of the profile of the deflector support body 30 being located between the intersection point 3 and the intersection point 4. The connection line between the tail end 32 of the molded line of the flow guiding support body 30 and the circle center O is a second coordinate line R2, wherein R2 is located at the end of the second boundary line R2, that is, the end between the intersection point 3 and the intersection point 4 is the tail end 32, and the length of R2 satisfies r2=k2×d/2, where K2 is greater than 1 and less than 10, and R2. Greater than R1. In this embodiment, K2 is 4.
After confirming the start 31 and end 32 of the profile of the deflector support 30, an airfoil is formed therebetween. One section of the flow guiding support body 30 faces the first air duct 50, the other end faces the air outlet 12, and the air quantity flowing from the position of the second port 52 enters the second air duct 60 and is overlapped with the air quantity generated by the second air duct 60, so that the flow guiding support body 30 divides the air quantity, as indicated by an arrow in the figure.
Referring to fig. 8, fig. 8 is a velocity distribution diagram of an air outlet of the heat dissipation module provided with the diversion support 30. The darker curve in the figure is the wind speed distribution of the diversion support body 30 without the diversion support body 30, the lighter curve is the wind speed distribution of the air outlet after the diversion support body 30 is arranged, and the two lines show that the positions of the diversion support body 30 are different and the wind speed distribution is different. In general, there will be a high speed region and a low speed region (the first region 60A of the second air duct 60) at the air outlet 12 of the volute 10, and it can be seen that there is a large low speed region at the middle portion (the first region 60A of the second air duct 60) at the air outlet 12 of the volute 10. Such low flow rates may reduce the heat exchange efficiency of the heat sink fins. As shown in fig. 8, the flow guiding support 30 guides a part of air volume into the first area 60A of the second air duct 60, it can be seen that the speed of the first area 60A (low speed area) of the second air duct 60 of the air outlet 12 of the volute 10 can be well improved by adopting the airfoil-shaped flow guiding support 30, so that the heat dissipation efficiency of the fins can be improved, and the heat dissipation effect of the whole heat dissipation module can be enhanced.
It can be understood that the first air duct 50 and the second air duct 60 jointly surround the periphery of the fan area 20A, the air quantity continuously accumulates along the rotation direction (clockwise) when the fan 20 rotates, the first preset angle θ1 and the second preset angle θ2 are preset angles, and the flow speed of the air flow in the air outlet 12 in the low-speed area can be improved according to the flow distribution division of the air flow in the second air duct 60 towards the air outlet. Alternatively, the air flow of the second air duct 60 at the position of the first dividing line R1 is divided at the start end 31 of the flow guiding support body 30, the distance from the start end 31 of the first coordinate line R1 to the fan region 20A and the distance from the start end 31 of the first coordinate line R1 to the first flat plate 153 are determined according to the air volume required by the middle region of the second air duct 60 (the first region 60A of the second air duct 60), for example, the distance from the start end 31 to the intersection point 1 is smaller than the distance from the start end 31 to the intersection point 2, and the flow of the air flow divided by the flow guiding support body 30 is less, that is, the specific position of the start end 31 can be designed according to the air volume of the two flow divided portions of the air flow at the position of the first dividing line R1.
Referring to fig. 7, fig. 7 is a schematic diagram of the heat dissipation module shown in fig. 3 with a plurality of diversion supports; in one embodiment, the two diversion supports 30 are respectively a first diversion support 30a and a second diversion support 30b, which may have the same or different lengths and the same or different shapes. The first flow guiding support body 30A and the second flow guiding support body 30b are arranged at intervals, the length of the first flow guiding support body 30A of this embodiment is greater than that of the second flow guiding support body 30b, the second flow guiding support body 30b is located in the first area 60A of the second air duct 60, the inclination directions of the first flow guiding support body 30A and the second flow guiding support body 30b are the same or similar, the flow guiding support bodies in the first area can further split the air flow in the first area, so that the air flow can uniformly pass through the air outlet, the flow velocity distribution of the air outlet 12 is more uniform, and uniform heat dissipation of the heat dissipation fins is realized. Both the start and end of the second deflector support body 30b may be determined according to the manner of determining the start and end of the deflector support body 30 of the above-described embodiment.
Referring to fig. 9 and 10, fig. 9 and 10 are schematic views of the spacer position forming process shown in fig. 3. The heat dissipation module of this embodiment further includes a partition plate 40, where the partition plate 40 is located in the first air duct 50 and is protruding on an inner surface 141 (fig. 3) of the plate 14, that is, on the bottom wall of the cavity. The partition plate 40 is an arc-shaped thin plate, and the length direction of the partition plate extends along the length direction of the first air duct 50; the partition plate 40 is arranged at intervals parallel to part of the arc-shaped sections, the molded line bending direction of the partition plate 40 faces the fan 20, the molded line of the partition plate 40 is an arc line, or a plurality of arcs with different curvatures are sequentially connected, or a Bezier curve, or a smooth curve, or a non-closed spline curve is adopted. The volute is internally provided with a partition plate, part of which is the same as or similar to the molded line of the side wall, so that the air outlet is smooth and the uniformity is improved.
The partition 40 is less than or equal to the height of the side wall 15 (or arcuate segment). The curvature of the molded line of the arc section is the same as or similar to that of the molded line of the partition plate 40, in this embodiment, the molded line of the second arc section 155 in the arc section is the same as or different from that of the partition plate 40, and the length of the molded line is equal to or different from that of the molded line of the partition plate 40, which is equivalent to that of the partition plate 40 with the same or similar part as that of the side wall 15 in the volute 10, so that the partition plate 40, the fan area 20A and the side wall form a double volute structure, and the air outlet uniformity is improved. And the molded line of the second arc section can be directly selected when the partition plate is designed, and the flow smoothness of the air flow of the sub-air duct can be improved. Along the fan rotation direction, the partition plate 40 divides the first air duct 50 into two sub-channels, and divides the air quantity continuously accumulated in the first air duct 50 in the fan rotation process, so that the problem that the air flow is continuously accumulated in the first air duct to generate overlarge flow speed, so that uneven heat dissipation in the first flow channel is caused, and the uniformity of the flow speed of the air flow in the first air duct is improved. And the flow rate of the air flow entering the second region 60B of the second air duct 60 from the first air duct can be adjusted, so that the excessive flow rate of the air flow is avoided, and the flow rate flowing to the first region 60A in the second air duct 60 can be adjusted. The sub-duct between the profile of the diaphragm 40 and the fan area 20A is the same width as the portion of the first duct 50 between the second arcuate segment 155 and the fan area 20A, and is actually formed by rotating the second arcuate segment 155 profile clockwise along a circle to the diaphragm position and referencing the second arcuate segment 155 profile.
After determining the start 401 and the end 402 of the partition 40, making an arc line to obtain a molded line of the partition 40, specifically, the fan area 20A includes a third preset angle θ3 and a fourth preset angle θ4; the third preset angle theta 3 is 30 degrees to 180 degrees, and the fourth preset angle theta 4 is greater than the third preset angle theta 3. The air flow in the first air duct 50 is continuously overlapped in the rotation direction of the fan, and the angle values of the third preset angle theta 3 and the fourth preset angle theta 4 can be determined according to the flow distribution proportion (ensuring the heat dissipation uniformity of the first air duct and avoiding the overlarge flow rate entering the second air duct) of the air flow generated in the first air duct under the same rotation speed in unit area.
Then, the center O of the fan area 20A is taken as a starting point, a straight line passing through a radius is taken as a third boundary r3, and an included angle between the third boundary r3 and the reference line F1 is a third preset angle θ3, so that the position of the third boundary r3 can be determined. The third dividing line r3 passes through the first air duct 50 and has an intersection point 1 with the fan area 20A and an intersection point 2 with the molded line of the side wall 15; the start 401 of the profile of the baffle 40 is located on the line connecting intersection 1 and intersection 2. Specifically, the connection line between the starting end 401 of the profile of the partition board 40 and the center O is a third coordinate line R3, where R3 is located at the end of the third dividing line R3, that is, the end between the intersection point 1 and the intersection point 2 is the starting end 401, and the length of R3 satisfies r3=k3×d/2, where K3 is greater than 1 and less than 2. In this example, K3 has a value of 0.2. It will be appreciated that the length R3 of the beginning 401 of the baffle 40 to the center O is greater than the radius of the fan area 20A and less than the length of the third dividing line R3.
Then, the center O of the fan area 20A is taken as a starting point, a straight line passing through a radius is taken as a fourth dividing line r4, and an included angle between the fourth dividing line r4 and the reference line F1 is a fourth preset angle θ4, so that the position of the fourth dividing line r4 can be determined. The fourth dividing line r4 passes through the first air duct 50 and has an intersection point 3 with the fan area 20A and an intersection point 4 with the molded line of the side wall 15; the end 402 of the profile of the baffle 40 is located on the line connecting intersection point 3 and intersection point 4. Specifically, the connection line between the tail end 402 of the molded line of the partition board 40 and the center O is a fourth coordinate line R4, where R4 is located at the end of the fourth dividing line R4, that is, the end between the intersection point 3 and the intersection point 4 is the tail end 402, the angle value of the fourth preset angle θ4 is k5×θ3, K5 is greater than 1 and less than 5, and the length of R4 satisfies r4=k4×r3, where K4 is greater than 1 and less than 2. The value of K4 in this example is 1.2. The fourth coordinate line R4 in this embodiment is located at the interface F and at the position of the second port 52. It will be appreciated that the length R4 of the end 402 of the partition 40 to the center O is greater than R3 and less than the length of the fourth dividing line R4.
The width of the first air duct 50 (the distance between the fan region 20A and the arc-shaped section) becomes gradually larger in the fan rotation direction. Further, the width of the sub-duct between the profile of the partition 40 and the fan area 20A is the same as the width between the second arc-shaped section 155 and the fan area 20A. The direction of the width of the first air duct 50 is also the flowing direction of the air flow, so that uneven flow velocity distribution and uneven heat dissipation caused by more accumulated air quantity in the rotating process of the fan are avoided, the uniformity of the flow velocity of the air flow in the first air duct 50 can be improved, and the uniformity of the flow velocity of the air outlet is further improved.
In one embodiment of determining the start 401 and the end 402 of the partition 40, the start of the partition 40 is located on the line between the third dividing line r3 and the fan area 20A and the chamber sidewall, and the end of the partition 40 is located on the line between the fourth dividing line r4 and the fan area 20A and the chamber sidewall, and the specific positions of the start and the end of the partition 40 are set according to the ratio of the actual airflow velocity to be divided, so that the required sub-duct widths on both sides of the partition 40 can be divided. It is also understood that the specific location of the beginning and end on the line is determined by the ratio of the flow rates of the streams of air that it is desired to divide into two parts.
In one embodiment of defining a beginning 401 and an end 402 of the partition 40, the arcuate segment and the fan area 20A are two walls of the duct, and the first duct 50 has a predetermined width; the start end of the partition plate 40 is located at a position where the width of the first air duct 50 is equal to the preset width value, and the end of the partition plate 40 is located at a position where the second port 52 is located. The starting end and the end of the partition plate 40 are set according to the proportion of the actual airflow velocity to be divided, so that the required sub-duct widths positioned at two sides of the partition plate 40 can be divided.
The heat conducting support body 30 is arranged in the volute 10 of the heat radiation module in the embodiment to replace the space between the common cylinder support cover plate 16 and the plate body 14, so that the fan 20 is prevented from being damaged when the volute 10 is subjected to external pressure, and the rigidity of the volute can be ensured; the speed distribution of the air flow at the air outlet 12 of the volute 10 can be improved, so that the air flow rate discharged from the air outlet 12 is uniform, and the heat dissipation efficiency of the heat dissipation fin group 70 is improved. Further, the partition plate 40 is disposed in the first air duct 50, so that the air flow in the first air duct can be split to achieve the effect of improving the uniformity of the flow velocity, and the air flow velocity of the first air duct 50 entering the second area in the second air duct 60 through the second port 52 can be regulated and controlled, and then the air flow velocity of the second air duct is homogenized by combining the diversion support 30, so that the uniformity of the air outlet is improved.
The above is only a part of examples and embodiments of the present application, and the scope of the present application is not limited thereto, and any person skilled in the art who is familiar with the technical scope of the present application can easily think about the changes or substitutions, and all the changes or substitutions are covered in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (15)

1. A heat dissipation module is characterized in that,
comprises a volute, a fan and a diversion support body; the volute comprises a heat dissipation cavity and an air outlet communicated with the heat dissipation cavity, the heat dissipation cavity comprises a cavity side wall and a cavity bottom wall, the cavity side wall is arranged at the edge of the cavity bottom wall and is provided with an arc section, the fan and the flow guide support body are arranged in the heat dissipation cavity, and the flow guide support body is convexly arranged at the cavity bottom wall;
the area where the fan is located is a fan area, a first air channel is arranged between the arc-shaped section and the fan area, and a second air channel is arranged between the air outlet and the first air channel in a connecting way; the second air duct comprises a first area and a second area, the first area and the second area are arranged along the width direction of the air outlet, the molded line of the interface of the first area and the second area is arc-shaped, the first area and the second area are communicated with the first air duct,
the flow guide support body is positioned in the second air duct, the initial end of the flow guide support body is positioned in the second area, the length extending direction of the flow guide support body is intersected with the width direction of the air outlet, the flow guide support body is used for dividing air flow in the second area and guiding partial divided air flow to the first area, the flow guide support body is a plate body, and the cross section of the plate body is an airfoil;
The fan area is provided with a first preset angle theta 1 and a second preset angle theta 2, a straight line passing through the radius of the fan area and the minimum position of the width of the first air duct is taken as a datum line,
two side lines forming the first preset angle theta 1 are the datum line and a first coordinate line R1 respectively, the length of the first coordinate line R1 meets the condition that R1=K1 is D/2, D is the diameter of a fan area, and the end part of the first coordinate line R1, which is far away from the center of a circle of the fan, is the starting end of the diversion support body;
two side lines forming the second preset angle theta 2 are the datum line and a second coordinate line R2 respectively, the length of the second coordinate line R2 meets the requirement that R2=K2 is D/2, D is the diameter of a fan area, K2 is larger than K1, and the end part of the second coordinate line R2 far away from the circle center is the tail end of the flow guiding support body;
wherein, the angle value of the first preset angle theta 1 and the second preset angle theta 2 is larger than 180 degrees and smaller than 360 degrees, and the angle of the first preset angle theta 1 is smaller than the angle of the second preset angle theta 2; k1 and K2 are both greater than 1 and less than 10.
2. The heat dissipating module of claim 1, wherein the heat dissipating cavity comprises a cavity top wall connected to the cavity side wall and opposite the cavity bottom wall; the flow guide support is supported between the cavity top wall and the cavity bottom wall.
3. The heat dissipation module according to claim 2, wherein the first area is provided with a flow guiding support body, the flow guiding support body in the first area is arranged at intervals with the flow guiding support body in the second area, the length extending direction of the flow guiding support body in the first area is intersected with the width direction of the air outlet, and the flow guiding support body in the first area is used for dividing the air flow flowing into the air outlet from the first area.
4. A heat dissipation module according to any one of claims 1-3, wherein the volute further comprises a partition plate, the partition plate is arranged on the bottom wall of the cavity in a protruding mode and located in the first air duct, the partition plate extends along the length direction of the first air duct, and the molded line of the partition plate is opposite to the molded line of the arc-shaped section at intervals.
5. The heat dissipation module of claim 4, wherein the molded line of the partition plate is an arc line, or a plurality of arcs with different curvatures are sequentially connected, or a bezier curve, or a non-closed spline curve.
6. The heat dissipating module of claim 5, wherein the arcuate segment comprises a first arcuate segment and a second arcuate segment, and wherein a profile of the spacer has the same curvature as a profile of the second arcuate segment.
7. The heat dissipating module of claim 4, wherein the width of the first air channel gradually increases along the direction of rotation of the fan.
8. The heat dissipating module of claim 6, wherein a width of the sub-air duct between the profile of the baffle and the fan area is the same as a width between the second arcuate segment and the fan area.
9. The heat dissipating module of claim 4, wherein the fan area has a third preset angle θ3 and a fourth preset angle θ4, the angle of θ4 is k5×θ3, and the angle of the third preset angle θ3 is greater than 30 degrees and less than 180 degrees; k5 is greater than 1 and less than 2;
a straight line passing through the radius of the fan area and the minimum position of the width of the first air duct is taken as a datum line,
two side lines forming the third preset angle theta 3 are the datum line and a third dividing line respectively, two side lines forming the fourth preset angle theta 4 are the datum line and a fourth dividing line respectively,
the start end of the partition is located on a line connecting the third dividing line with the fan region and the chamber sidewall, and the end of the partition is located on a line connecting the fourth dividing line with the fan region and the chamber sidewall.
10. The heat dissipating module of claim 9,
determining a third coordinate line R3 on the third dividing line, wherein the length of the third coordinate line R3 meets R3 = K1 x D/2, D is the radius of a fan area, and the end part of the third coordinate line R3, which is far away from the circle center, is the starting end of the partition board;
determining a fourth coordinate line R4 on the fourth dividing line, wherein the length of the fourth coordinate line R4 meets the condition that R4 = K4 is equal to R3, K4 is larger than K1, and the end part of the fourth coordinate line R4 far away from the circle center is the tail end of the partition board; wherein the angle of the third preset angle theta 3 is more than 30 degrees and less than 180 degrees; k3 is greater than 1 and less than 2, and K4 is greater than 1 and less than 2.
11. The heat dissipating module of claim 4 wherein said arcuate segment and said fan region are two walls of said air duct, said first air duct having a predetermined width, said first air duct having a port therebetween, said port being located in a line that passes through a radius of said fan region;
the starting end of the partition plate is located at the position where the width of the first air channel is equal to the preset width value, and the tail end of the partition plate is located at the position where the port is located.
12. The heat dissipating module of claim 1 wherein said cavity side wall comprises two opposing first and second plate segments connected by said arcuate segment, said first and second plate segments being located on opposite sides of said air outlet in a width direction,
The arc-shaped section comprises a first arc-shaped section and a second arc-shaped section which are connected, wherein the molded line of the first arc-shaped section in the length direction is a circular arc line or is formed by connecting a plurality of arcs with different curvatures; the molded lines of the second arc section in the length direction are arc lines or arc connection of a plurality of different curvatures.
13. The heat dissipating module of claim 1, further comprising a thermally conductive member coupled to the outer surface of the volute.
14. The heat dissipating module of claim 1, further comprising a heat dissipating fin set disposed outside the volute and connected to the air outlet.
15. An electronic device, comprising a main body and the heat dissipation module set according to any one of claims 1 to 13, wherein the heat dissipation module set is installed in the main body, the heat dissipation module set further comprises a heat dissipation fin set, the heat dissipation fin set is installed outside the volute and connected with the air outlet, and the heat dissipation fin set exposes out of the main body.
CN202210010487.6A 2021-12-03 2022-01-05 Heat dissipation module and electronic equipment Active CN115066139B (en)

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CN115066139A (en) 2022-09-16
CN116234231B (en) 2024-03-29
CN115003103B (en) 2023-03-31
WO2023098220A1 (en) 2023-06-08
CN115003103A (en) 2022-09-02
WO2023098219A9 (en) 2023-09-28
CN116234231A (en) 2023-06-06

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