Heat dissipation structure and motor
By designing the heat dissipation structure of the annular body and the flow guide components, the problem of uneven flow of the parallel flow channel is solved, uniform heat dissipation and high-efficiency operation of the motor are achieved, and noise and vibration performance are improved.
Patent Information
- Application Number
- CN202421022297.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-11
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-05-11
AI Technical Summary
In the prior art, the uneven flow distribution of the parallel flow channel leads to a decrease in the motor's heat dissipation ability, a decrease in efficiency, and poor noise and vibration performance, which easily leads to high-temperature failure.
Design a heat dissipation structure of an annular body, by setting up a plurality of parallel flow channels arranged along the outer periphery of the annular body, and setting a flow guide member and an arc-shaped flow guide surface at the connection of the flow channel, adjusting the geometry of the flow channel through simulation Parameters and structure ensure uniform flow of each flow channel and avoid excessive stress of the flow channel.
The uniform distribution of flow rates of each parallel flow channel is achieved, the heat dissipation efficiency of the motor is improved, the noise and vibration performance is reduced, and the high temperature failure of the motor is avoided.
Smart Images
Figure CN222301549U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of heat control technology, and in particular to a heat dissipation structure and a motor. Background Art
[0002] With the rapid development in recent years, permanent magnet motors have been developing towards high power density, high efficiency, and high integration, which will inevitably lead to an increase in heat generation. Efficient heat dissipation is the key to achieving the above technologies. At present, motor cooling mostly adopts air cooling and liquid cooling. In the liquid cooling heat dissipation method, the cooling channel structure with small flow (30L / min and below) mostly adopts axial spiral, axial Z-shaped and circumferential Z-shaped single-channel series connection for cooling and heat dissipation. With the increase of coolant flow, the single-channel series connection method leads to an increase in channel pressure loss. In order to meet the cooling effect, the power of the circulating pump must increase, resulting in an increase in the cost of the whole machine.
[0003] To solve this problem, multi-channel parallel cooling is used for cooling channels with large flow rates (100L / min and above). However, the channel cross-section of the parallel channel at the confluence of the inlet and outlet is large, which not only weakens the strength of the casing and reduces the noise, vibration and harshness (NVH) performance of the motor, but also cannot ensure that the flow rate passing through each parallel channel is evenly distributed, resulting in a decrease in the heat dissipation capacity of the motor and a decrease in the motor efficiency. In severe cases, the motor may fail due to high temperature. Utility Model Content
[0004] The main purpose of the present application is to provide a heat dissipation structure and a motor, so as to at least solve the problem in the prior art that the flow rates of the parallel flow channels are unevenly distributed, resulting in a decrease in the heat dissipation capacity of the motor and a decrease in the efficiency of the motor.
[0005] According to one aspect of the present application, a heat dissipation structure is provided, the heat dissipation structure comprising:
[0006] An annular body, wherein a first connecting channel, a second connecting channel and a plurality of flow channels are arranged inside the annular body, the plurality of flow channels are arranged in a C shape along the outer circumference of the annular body, the plurality of flow channels are sequentially arranged and spaced along the length direction of the annular body, the first ends of the plurality of flow channels are connected through the first connecting channel, and the second ends of the plurality of flow channels are connected through the second connecting channel;
[0007] a liquid inlet channel, the liquid inlet channel being disposed on the annular body and being in communication with the first connecting channel;
[0008] A liquid outlet channel is provided on the annular main body and is communicated with the second connecting channel.
[0009] Further, a flow guide component is provided at a connection point between at least one of the plurality of flow channels and the first connecting channel; and / or,
[0010] A flow guide component is provided at a connection point between at least one of the plurality of flow channels and the second connecting channel.
[0011] Furthermore, the flow guide component is provided with an arc-shaped flow guide surface.
[0012] Further, the outer circumference of the annular body includes a first straight line, and the first straight line is arranged parallel to the axis of the annular body;
[0013] The flow guide component includes a flow guide column, the cross section of the flow guide column is an elliptical surface, and the angle A between the major axis of the elliptical surface and the first straight line satisfies the relationship: 0≤A≤30°.
[0014] Furthermore, the annular body includes a first shell and a second shell, and the first shell and / or the second shell are provided with a recessed portion arranged in a C shape along the outer circumference of the annular body, and the recessed portion is provided with n convex ribs arranged in a C shape along the outer circumference of the annular body, n∈N+, the first shell cover is arranged on the second shell, and a plurality of the flow channels are formed between the first shell and the second shell.
[0015] Further, the outer circumference of the annular body further includes a second straight line, the second straight line is arranged parallel to the axis of the annular body, and the first ends of the n convex ribs are aligned with the second straight line; and / or,
[0016] The outer circumference of the annular body also includes a third straight line, the third straight line is arranged parallel to the axis of the annular body, and the second ends of the n convex ribs are all aligned with the third straight line.
[0017] Furthermore, the heights of the n ribs along the radial direction of the annular body are all the same.
[0018] Further, the first ends of the n convex ribs and the space between the side walls of the recessed portion relative to the first ends of the n convex ribs form the first connecting channel;
[0019] The second connection channel is formed by a space between the second ends of the n convex ribs and a side wall of the recessed portion relative to the second ends of the n convex ribs.
[0020] Furthermore, the liquid inlet channel is opened on the first shell and communicates with the first connecting channel at one end along the length direction of the annular body, and the liquid outlet channel is opened on the first shell and communicates with the second connecting channel at the other end along the length direction of the annular body.
[0021] On the other hand, the present application also provides a motor, which includes the above-mentioned heat dissipation structure.
[0022] Compared with the prior art, the flow rates of the parallel flow channels in the heat dissipation structure of the present application are the same, thereby avoiding excessive flow rates in the flow channels near the liquid inlet and the liquid outlet, which may cause the flow channels to be overstressed and easily damaged. In addition, since the flow rates of the flow channels are the same, the heat dissipation structure can dissipate heat more evenly for the motor, thereby improving the heat dissipation efficiency of the motor and avoiding a reduction in the working efficiency of the motor. At the same time, since the flow rates of the flow channels are the same, the connection points of the flow channels will not cause vibrations between the liquids in the flow channels due to excessive pressure differences between the liquids, thereby reducing the NVH performance of the heat dissipation structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:
[0024] Figure 1 A logical schematic diagram of a design method for a heat dissipation structure disclosed in this application;
[0025] Figure 2 This is a schematic diagram of the structure of the motor disclosed in this application.
[0026] Figure 3 A half-section view of the motor disclosed in the present application;
[0027] Figure 4 It is a structural schematic diagram of the heat dissipation structure disclosed in this application at a first viewing angle;
[0028] Figure 5 This is a schematic structural diagram of the heat dissipation structure disclosed in this application at a second viewing angle.
[0029] The above drawings include the following reference numerals:
[0030] 10. annular body; 11. first shell; 12. second shell; 13. flow channel; 14. flow guide component; 15. liquid inlet channel; 16. liquid outlet channel; 17. first connecting channel; 18. second connecting channel; 20. motor body; 31. first straight line; 32. second straight line; 33. third straight line; 121. recessed portion; 131. first flow channel; 132. second flow channel; 133. third flow channel; 134. fourth flow channel; 135. fifth flow channel; 136. sixth flow channel; 1211. convex rib. DETAILED DESCRIPTION
[0031] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0032] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0033] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.
[0034] See also Figure 1 As shown, according to an embodiment of the present application, a design method for a heat dissipation structure is provided, the method comprising:
[0035] Step S1: presetting a heat dissipation structure having a plurality of parallel flow channels 13;
[0036] Step S2: Simulate the heat dissipation structure to obtain the flow rate of each of the flow channels 13, and compare the flow rates of the multiple flow channels 13 with the predetermined flow rate range. If at least one of the flow rates of the multiple flow channels 13 exceeds the predetermined flow rate range, change the geometric parameters of the heat dissipation structure or change the geometric structure of the heat dissipation structure, and then execute step S2 again until the flow rates of the multiple flow channels 13 are all included in the predetermined flow rate range.
[0037] Specifically, when starting to design, an arbitrary heat dissipation structure with multiple parallel flow channels 13 can be pre-designed, that is, the widths of the multiple parallel flow channels 13 can be equal or unequal. Figure 4As shown, a heat dissipation structure having six flow channels 13 arranged side by side can be set, and the six flow channels 13 are respectively the first flow channel 131, the second flow channel 132, the third flow channel 133, the fourth flow channel 134, the fifth flow channel 135 and the sixth flow channel 136, and the width of each flow channel 13 is the same. Subsequently, the flow rates of the six flow channels 13 are obtained respectively through simulation, and then each flow channel 13 is compared with the predetermined flow range. If the flow rate of a flow channel 13 exceeds the predetermined flow range, the geometric parameters or geometric structure of the heat dissipation structure are readjusted. For example, if the flow rate of the first flow channel 131 exceeds the predetermined flow range, the flow rate of the first flow channel 131 is changed by changing the geometric parameters or geometric structure of the first flow channel 131. It is worth noting that in this embodiment, the total flow rate through the heat dissipation structure is Q, and the number of flow channels 13 is N. In order to ensure that the flow rates of each flow channel 13 are the same as much as possible, the predetermined flow rate range is set to: [Q / N(1-5%), Q / N(1+5%)], that is, the flow rate of each flow channel 13 should be within the above range.
[0038] Further, in step S2, the geometric parameters include the cross-sectional area of the flow channel 13. Specifically, if the flow rate of the flow channel 13 exceeds the predetermined flow rate range after the simulation test, the cross-sectional area of the flow channel 13 can be changed, that is, the cross-sectional area of the flow channel 13 with a larger flow rate can be reduced, or the cross-sectional area of the flow channel with a larger flow rate can be increased.
[0039] Preferably, in step S2 , the step of changing the geometric parameters of the heat dissipation structure includes: changing the width of the flow channel 13 to change the cross-sectional area of the flow channel 13 .
[0040] Specifically, the flow rate of the flow channel 13 is positively correlated with the cross-sectional area. The cross-sectional area of the flow channel 13 includes the width and depth of the flow channel 13. Changing the depth of the flow channel 13 will cause the overall thickness of the heat dissipation structure to be too thin, which is easy to cause damage to the heat dissipation structure under the action of external force. However, changing the width of the flow channel 13 will not cause too much interference to the heat dissipation performance of the heat dissipation structure or the motor. Therefore, changing the width of the flow channel 13 is a better solution.
[0041] Optionally, in step S2, the step of changing the geometric structure includes: setting a flow guide component 14 at the port portion of the flow channel 13. Specifically, the flow of the flow channel 13 can also be changed by setting a flow guide component 14 at the port portion of the flow channel 13 to increase the flow of the flow channel 13 or reduce the flow of the flow channel 13. In addition, changing the size of the flow guide component 14 and changing the setting angle of the flow guide component 14 can gradually adjust the flow of the flow channel 13. Generally speaking, when the flow of the flow channel 13 differs greatly from the predetermined flow range, if the flow of the flow channel 13 is less than the minimum value of the predetermined flow range, the flow guide component 14 is set at the liquid inlet end of the flow channel 13. If the flow of the flow channel 13 is greater than the maximum value of the predetermined flow range, the flow guide component 14 is set at the liquid outlet end of the flow channel 13. If after the flow guide component 14 is set, the flow of the flow channel 13 differs little from the predetermined flow range, the size of the flow guide component 14 or the angle at which the flow guide component 14 is set can be adjusted so that the flow of the flow channel 13 meets the predetermined flow range.
[0042] Further, in step S2, the step of changing the geometric structure also includes: if the flow rate of at least one of the plurality of flow channels is greater than the predetermined flow rate range, the flow guide component is arranged at the liquid outlet end of the flow channel with a larger flow rate. If the flow rate of at least one of the plurality of flow channels is less than the predetermined flow rate range, the flow guide component is arranged at the liquid inlet end of the flow channel with a smaller flow rate. Specifically, if the flow channel 13 with a smaller flow rate is less than the minimum value Q / N (1-5%) of the predetermined flow rate range, a flow guide component 14 is arranged at the liquid inlet end of the flow channel 13 with a smaller flow rate, and the flow guide component 14 can apply a certain resistance to the coolant, so that the coolant is blocked at the mouth of the flow channel 13 with a smaller flow rate and enters the flow channel 13, thereby increasing the flow rate of the flow channel 13. On the contrary, if the flow channel 13 with a larger flow rate is greater than the maximum value Q / N (1+5%) of the predetermined flow rate range, when the flow guide component 14 is arranged at the liquid outlet of the flow channel 13 with a larger flow rate, resistance is applied to the liquid outlet end of the flow channel 13, thereby reducing the flow rate of the flow channel 13.
[0043] Furthermore, in step S2 , the heat dissipation structure is simulated using finite element analysis software to obtain the flow rate of each flow channel 13 .
[0044] In a specific embodiment, the preset heat dissipation structure first has six parallel channels 13 with the same cross-section, namely the first channel 131, the second channel 132, the third channel 133, the fourth channel 134, the fifth channel 135 and the sixth channel 136. The inlet channel 15 is opened at the inlet end of the first channel 131, and the outlet channel 16 is opened at the outlet end of the sixth channel 136. By simulating the flow of each channel 13 of the preset heat dissipation structure through finite element analysis software, it can be obtained that the flow of the first channel 131 and the sixth channel 136 is larger, followed by the second channel 132 and the fifth channel 135. The flow of the third channel 133 and the fourth channel 134 is smaller. Each channel 13 is compared with the maximum value of the predetermined flow range or the minimum value of the predetermined flow range. The flow of the first channel 131 and the sixth channel 136 exceeds the maximum value of the predetermined flow range, and the flow of the third channel 133 and the fourth channel 134 is less than the minimum value of the predetermined flow range. Then the geometric structure of the heat dissipation structure is changed, and a flow guide component 14 is set at the liquid inlet end of the third flow channel 133 and / or the fourth flow channel 134, and a flow guide component 14 is set at the liquid outlet end of the first flow channel 131 and / or the sixth flow channel 136. The flow of each flow channel 13 of the heat dissipation structure is simulated again by finite element analysis software, and the flow of each flow channel 13 is calculated again to see whether it exceeds the predetermined flow range. If it exceeds, a flow guide component 14 is set at the liquid outlet end of the flow channel 13 with a larger flow or a flow guide component 14 is set at the liquid inlet end of the flow channel 13 with a smaller flow, or the cross-sectional area of the flow channel 13 with a larger flow is reduced, and the cross-sectional area of the flow channel 13 with a larger flow is increased. Repeat the above steps until the flow of each flow channel 13 is included in the predetermined flow range, and the design of the heat dissipation structure is completed.
[0045] On the other hand, if the Figure 4 To Attachment Figure 5 As shown, the present application also provides a heat dissipation structure, which is designed using the above-mentioned heat dissipation structure design method. The heat dissipation structure includes an annular body 10, a liquid inlet channel 15 and a liquid outlet channel 16.
[0046] The annular body 10 is provided with a first connecting channel 17, a second connecting channel 18 and a plurality of flow channels 13. The plurality of flow channels 13 are arranged in a C-shape along the outer periphery of the annular body 10. The plurality of flow channels 13 are sequentially arranged and spaced along the length direction of the annular body 10. The first ends of the plurality of flow channels 13 are connected through the first connecting channel 17, and the second ends of the plurality of flow channels 13 are connected through the second connecting channel 18. The liquid inlet channel 15 is provided on the annular body 10 and is connected to the first connecting channel 17. The liquid outlet channel 16 is provided on the annular body 10 and is connected to the second connecting channel 18.
[0047] Specifically, the heat dissipation structure in this embodiment is designed by the design method of the heat dissipation structure mentioned above. In this embodiment, each flow channel 13 of the heat dissipation structure is a parallel flow channel 13, that is, each flow channel 13 can pass the coolant at the same time. In addition, in this embodiment, the flow rate of each flow channel 13 is the same, and the multiple flow channels 13 are arranged in a C shape along the outer periphery of the annular body 10 so that the flow channels 13 can dissipate heat to the motor in all directions more evenly, avoiding heat accumulation in local areas of the motor, resulting in reduced working efficiency of the motor. It should be noted that "the multiple flow channels 13 are arranged in a C shape along the outer periphery of the annular body 10" means that the multiple flow channels 13 extend along the outer periphery of the annular body 10, but are not connected.
[0048] The heat dissipation structure in this embodiment is used to dissipate heat from the motor. Compared with the prior art, the flow rates of the parallel flow channels 13 in the heat dissipation structure of this embodiment are the same, thereby avoiding excessive flow rates in the flow channels 13 near the liquid inlet and the flow channels 13 near the liquid outlet, which may cause the flow channels 13 to be overstressed and easily damaged. In addition, since the flow rates of the flow channels 13 are the same, the heat dissipation structure dissipates heat more evenly for the motor, thereby improving the heat dissipation efficiency of the motor and avoiding a reduction in the working efficiency of the motor. At the same time, since the flow rates of the flow channels 13 are the same, the connection points of the flow channels 13 will not cause vibrations between the liquids in the flow channels 13 due to excessive pressure differences between the liquids, thereby reducing the NVH performance of the heat dissipation structure.
[0049] In some embodiments, a flow guide component 14 is provided at the connection between at least one of the plurality of flow channels 13 and the first connecting channel 17. Specifically, when the cross sections of the flow channels 13 are different, a flow guide component 14 is provided at the connection between the flow channel 13 with a larger cross section and the second connecting channel 18 to increase the resistance of the flow channel 13, thereby reducing the flow rate of the flow channel 13.
[0050] Optionally, a flow guide component 14 is provided at the connection between at least one of the plurality of flow channels 13 and the second connecting channel 18. Conversely, a flow guide component 14 is provided at the connection between the flow channel 13 with a smaller cross section and the first connecting channel 17, and the flow guide component 14 can block part of the liquid in the first connecting channel 17 at the flow guide component 14, so that part of the liquid enters the flow channel 13 with a smaller cross section, so as to increase the flow rate of the flow channel 13.
[0051] In order to prevent the flow guide component 14 from blocking the flow of the liquid in the first connecting channel 17 or the second connecting channel 18 too much, in this embodiment, an arcuate flow guide surface is provided on the flow guide component 14. Specifically, compared with a straight flow guide surface, the arcuate flow guide surface has less resistance to the liquid, and will not cause the liquid to stop flowing under the resistance of the flow guide component 14.
[0052] Furthermore, the outer circumference of the annular body 10 includes a first straight line 31, and the first straight line 31 is arranged parallel to the axis of the annular body 10. The flow guide component 14 includes a flow guide column, the cross section of the flow guide column is an elliptical surface, and the angle A between the major axis of the elliptical surface and the first straight line 31 satisfies the relationship: 0≤A≤30°.
[0053] Specifically, the angle A between the major axis of the elliptical surface and the first straight line 31 affects the resistance of the guide column to the liquid. When A satisfies the relationship 0≤A≤30°, the resistance imposed by the guide column on the liquid in the first connecting channel 17, the second connecting channel 18 or the flow channel 13 will not be too large, and the coolant can pass through each flow channel smoothly. If the angle A is greater than 30°, the resistance imposed by the guide column on the liquid may be too large, so that too much of the blocked liquid enters the flow channel 13 where the guide column is provided, and the flow rate of the flow channel 13 is increased too much, resulting in different flow rates in each flow channel, such as when the guide column is provided at the connection between the flow channel 13 and the first connecting channel 17, and the angle A is 90°. Or the resistance imposed by the guide column on the liquid is too large, making it difficult for the liquid in the flow channel 13 to flow out of the flow channel 13, thereby reducing the flow rate of the flow channel 13 too much, such as when the guide column is provided at the connection between the flow channel 13 and the second connecting channel 18, and the angle A is 90°. The values of the angle A can be 5°, 10°, 15°, 20°, 25° and 30°.
[0054] In addition, the major axis and minor axis of the guide column are proportional to the resistance of the guide column, that is, the flow rate of the flow channel 13 can be adjusted by setting the length of the major axis or the length of the minor axis of the guide column.
[0055] Furthermore, the annular body 10 includes a first shell 11 and a second shell 12, and the first shell 11 and / or the second shell 12 are provided with a recessed portion 121 arranged in a C shape along the outer circumference of the annular body 10, and n convex ribs 1211 arranged in a C shape along the outer circumference of the annular body 10 are provided in the recessed portion 121, where n∈N + The first shell 11 is covered on the second shell 12 , and a plurality of flow channels 13 are formed between the first shell 11 and the second shell 12 .
[0056] It is worth mentioning that “the first shell 11 and / or the second shell 12 are provided with a recessed portion 121 arranged in a C-shape along the outer periphery of the annular body 10” refers to one of the three situations: the first shell 11 is provided with a recessed portion 121 arranged in a C-shape along the outer periphery of the annular body 10, the second shell 12 is provided with a recessed portion 121 arranged in a C-shape along the outer periphery of the annular body 10, and the first shell 11 and the second shell 12 are provided with a recessed portion 121 arranged in a C-shape along the outer periphery of the annular body 10. In a specific embodiment, the second shell 12 is provided with a recessed portion 121 arranged in a C-shape along the outer periphery of the annular body 10, and after the first shell 11 is covered on the second shell 12, the recessed portion 121, n ribs 1211 and the first shell 11 are surrounded to form a plurality of flow channels 13. In this embodiment, the second shell 12 is sleeved on the outer periphery of the motor body 20.
[0057] Furthermore, the outer circumference of the annular body 10 further includes a second straight line 32 , the second straight line 32 is arranged parallel to the axis of the annular body 10 , and the first ends of the n convex ribs 1211 are all aligned with the second straight line 32 .
[0058] Specifically, the first ends of the n convex ribs 1211 are aligned with the second straight line 32. This arrangement facilitates the mold manufacturing of the annular body 10 on the one hand; on the other hand, by aligning the first ends of the convex ribs 1211 with the second straight line 32, it is possible to avoid spatial interference between the flow guide component 14 and the convex rib 1211 when the flow guide component 14 is arranged at the first end of each flow channel 13. Similarly, the outer periphery of the annular body 10 also includes a third straight line 33, which is arranged parallel to the axis of the annular body 10, and the second ends of the n convex ribs 1211 are aligned with the third straight line 33.
[0059] In order to avoid the different heights of the ribs 1211 along the radial direction of the annular body 10, which results in a gap between at least one of the ribs 1211 and the first shell 11 or the second shell 12 after the first shell 11 is covered on the second shell 12, so that at least two flow channels 13 are connected, resulting in a change in the flow rate of the flow channel 13. Therefore, in this embodiment, the heights of the n ribs 1211 along the radial direction of the annular body 10 are the same, so as to avoid the gap between the ribs 1211 and the first shell 11 or the second shell 12 due to the different heights of the ribs 1211. In a specific embodiment, a recessed portion 121 is provided on the second shell 12, and the height of each rib 1211 in the recessed portion 121 is the same as the recessed depth of the recessed portion 121. After the first shell 11 is covered on the second shell 12, it is locked by screws, and a sealing member is provided near the top of the rib 1211 near the second shell 12. In this embodiment, the rib 1211 is integrally formed with the second shell 12.
[0060] In addition, the space between the first ends of the n convex ribs 1211 and the side wall of the recessed portion 121 relative to the first ends of the n convex ribs 1211 forms a first connection channel 17. The space between the second ends of the n convex ribs 1211 and the side wall of the recessed portion 121 relative to the second ends of the n convex ribs 1211 forms a second connection channel 18.
[0061] Specifically, each rib 1211 in the recessed portion 121 is not connected to the side wall of the recessed portion 121 when extending, so that a first connection channel 17 is formed between the first end of each rib 1211 and the side wall of the recessed portion 121 opposite thereto, and a second connection channel 18 is formed between the second end of each rib 1211 and the side wall of the recessed portion 121 opposite thereto. The first connection channel 17 is used to guide the coolant entering the heat dissipation structure into each flow channel 13, and the second connection channel 18 is used to guide the coolant flowing out of each flow channel 13 out of the heat dissipation structure. At the same time, the first end of each rib 1211 is aligned with the second straight line 32, and the second end of each rib 1211 is aligned with the third straight line 33, and the first connection channel 17 and the second connection channel 18 are both straight channels, so as to reduce the resistance of the first connection channel 17 and the second connection channel 18 to the liquid.
[0062] Furthermore, the liquid inlet channel 15 is opened on the first shell 11 and communicates with the first connecting channel 17 at one end along the length direction of the annular body 10. The liquid outlet channel 16 is opened on the first shell 11 and communicates with the second connecting channel 18 at the other end along the length direction of the annular body 10.
[0063] Specifically, the liquid inlet channel 15 is connected to one end of the first connecting channel 17 along the length direction of the annular body 10, and the liquid outlet channel 16 is connected to the other end of the second connecting channel 18 along the length direction of the annular body 10, so that the coolant can flow through the entire heat dissipation structure more comprehensively after entering the heat dissipation structure, thereby dissipating the heat of the motor more evenly. Compared with the way that the liquid inlet channel 15 is connected to the middle of the first connecting channel 17 and the liquid outlet channel 16 is connected to the middle of the second connecting channel 18, there may be areas where the coolant does not flow at both ends of the first connecting channel 17 and the second connecting channel 18 along the length direction of the annular body 10, so that the motor cannot be fully cooled, which may cause heat accumulation and damage to the motor.
[0064] On the other hand, if the Figure 2 and attached Figure 3 As shown, the present application also provides a motor, in which a heat dissipation structure is sleeved on the outer periphery of the stator core of the motor body 20 to dissipate heat from the motor. The motor includes the heat dissipation structure in the above embodiment, and therefore, the motor includes all the technical effects of the heat dissipation structure in the above embodiment. Since the technical effects of the heat dissipation structure have been described in detail above, they will not be repeated here.
[0065] In summary, the present embodiment provides a design method for a heat dissipation structure, a heat dissipation structure, and a motor having a heat dissipation structure. Through the design method for the heat dissipation structure of the present embodiment, a heat dissipation structure having multiple parallel flow channels 13 with the same flow rate is designed and manufactured. Multiple parallel flow channels 13 with the same flow rate can guide the coolant to pass through each branch flow channel 13 evenly, so as to improve the convective heat transfer coefficient of the entire heat dissipation structure, and effectively avoid uneven flow rate inside the cooling flow channel 13, which reduces the heat dissipation capacity of the motor, resulting in reduced motor efficiency or damage to the motor. In addition, since the flow rate of each flow channel 13 is uniform, the flow rate in the flow channel 13 close to the liquid inlet channel 15 or the flow channel 13 close to the liquid outlet channel 16 will not be too large, resulting in a large stress on the heat dissipation structure at this location, which can easily cause damage to the heat dissipation structure. That is, the heat dissipation structure of the present embodiment has high rigidity and good noise, vibration and harshness (NVH) performance.
[0066] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.
[0067] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.
[0068] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A heat dissipation structure, characterized in that: The heat dissipation structure comprises: An annular body (10), wherein a first connecting channel (17), a second connecting channel (18) and a plurality of flow channels (13) are arranged inside the annular body (10), the plurality of flow channels (13) are arranged in a C-shape along the outer circumference of the annular body (10), the plurality of flow channels (13) are arranged in sequence and spaced apart along the length direction of the annular body (10), the first ends of the plurality of flow channels (13) are connected via the first connecting channel (17), and the second ends of the plurality of flow channels (13) are connected via the second connecting channel (18); a liquid inlet channel (15), the liquid inlet channel (15) being provided on the annular body (10) and being in communication with the first connecting channel (17); A liquid outlet channel (16), wherein the liquid outlet channel (16) is provided on the annular main body (10) and is in communication with the second connecting channel (18).
2. The heat dissipation structure according to claim 1, characterized in that: A flow guide component (14) is provided at a connection point between at least one of the plurality of flow channels (13) and the first connecting channel (17); and / or, A flow guide component (14) is provided at the connection point between at least one of the plurality of flow channels (13) and the second connecting channel (18).
3. The heat dissipation structure according to claim 2, characterized in that: The flow guide component (14) is provided with an arc-shaped flow guide surface.
4. The heat dissipation structure according to claim 2, characterized in that: The outer circumference of the annular body (10) comprises a first straight line (31), and the first straight line (31) is arranged parallel to the axis of the annular body (10); The flow guide component (14) comprises a flow guide column, the cross section of which is an elliptical surface, and the angle A between the major axis of the elliptical surface and the first straight line (31) satisfies the relationship: 0≤A≤30°.
5. The heat dissipation structure according to claim 1, characterized in that: The annular body (10) comprises a first shell (11) and a second shell (12); the first shell (11) and / or the second shell (12) are provided with a recessed portion (121) arranged in a C-shape along the outer circumference of the annular body (10); n convex ribs (1211) are arranged in a C-shape along the outer circumference of the annular body (10), wherein n∈N + The first shell (11) is covered on the second shell (12), and a plurality of flow channels (13) are formed between the first shell (11) and the second shell (12).
6. The heat dissipation structure according to claim 5, characterized in that: The outer circumference of the annular body (10) further includes a second straight line (32), the second straight line (32) is arranged parallel to the axis of the annular body (10), and the first ends of the n convex ribs (1211) are all aligned with the second straight line (32); and / or, The outer circumference of the annular body (10) also includes a third straight line (33), the third straight line (33) is arranged parallel to the axis of the annular body (10), and the second ends of the n convex ribs (1211) are all aligned with the third straight line (33).
7. The heat dissipation structure according to claim 5, characterized in that: The heights of the n convex ribs (1211) along the radial direction of the annular body (10) are all the same.
8. The heat dissipation structure according to claim 5, characterized in that: The space between the first ends of the n convex ribs (1211) and the side wall of the recessed portion (121) relative to the first ends of the n convex ribs (1211) forms the first connecting channel (17); The space between the second ends of the n convex ribs (1211) and the side wall of the recessed portion (121) relative to the second ends of the n convex ribs (1211) forms the second connecting channel (18).
9. The heat dissipation structure according to claim 5, characterized in that: The liquid inlet channel (15) is provided on the first shell (11) and is communicated with the first connecting channel (17) at one end along the length direction of the annular body (10); the liquid outlet channel (16) is provided on the first shell (11) and is communicated with the second connecting channel (18) at the other end along the length direction of the annular body (10).
10. A motor, characterized in that: The motor comprises the heat dissipation structure according to any one of claims 1 to 9.