Power module and converter
By setting up a heat dissipation assembly and a heat dissipation cavity in the power module, forming a heat dissipation air duct and using airflow to exchange heat, the problem of poor heat dissipation effect of the existing power module is solved, efficient heat dissipation and environmental protection are achieved, and overall cost is reduced .
Patent Information
- Application Number
- CN202420647131.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-03-29
AI Technical Summary
The existing power modules have poor heat dissipation effects, which leads to easy damage to capacitor components, which require frequent replacement and high cost, and are difficult to protect in complex environments.
A power module is designed. By setting a heat dissipation assembly and a heat dissipation cavity in the module, a heat dissipation air duct is formed, and heat exchange is used for air flow, so as to achieve efficient heat dissipation of the capacitor and power components, and to convert the capacitor and power components. Share the cooling air duct to avoid additional radiator installation.
It realizes rapid heat dissipation of capacitor components and power components, extends the service life of the module, reduces the cost of heat dissipation, and provides efficient protection in complex environments such as wind, sand, salt spray, etc.
Smart Images
Figure CN222339241U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of converters, in particular to a power module and a converter. Background Art
[0002] With the rapid development of the new energy industry, the application of converters in complex and harsh environments has gradually increased, and application environments such as wind, sand, and salt spray have become increasingly normalized, so the protection requirements for converters are becoming higher and higher. The power module is the core component of the converter. As the power increases, its reliability directly determines whether the converter can operate normally. At the same time, the power module has high requirements for application environments such as salt spray, dust, and heat dissipation. The power module usually adopts an integrated design, integrating capacitor components, power components, busbars and other components to form an independent functional unit structure. The rationality of the heat dissipation of the power module will directly affect the service life of the product.
[0003] Existing capacitor components have poor heat dissipation effect, and the high temperature generated by accumulation can easily cause capacitor damage, resulting in frequent and costly replacement of capacitor components.
[0004] Therefore, a power module and a converter are urgently needed to solve the above problems. Utility Model Content
[0005] The purpose of the utility model is to provide a power module and a converter, which can efficiently dissipate the heat of the capacitor component and quickly dissipate the excess heat of the capacitor component without the need for an additional heat sink.
[0006] To achieve this purpose, the utility model adopts the following technical solutions:
[0007] Power module, including:
[0008] Power components;
[0009] A heat dissipation component, which is arranged on one side of the power component and is used to dissipate heat from the power component;
[0010] A heat dissipation cavity, wherein a heat dissipation air duct is formed inside the heat dissipation cavity, the heat dissipation cavity is provided with an air inlet and an air outlet, the airflow in the heat dissipation air duct has a flow trend from the air inlet to the air outlet, and the heat dissipation end of the heat dissipation component is located in the heat dissipation air duct;
[0011] The capacitor component is arranged in the heat dissipation duct, and the airflow in the heat dissipation duct flows through the capacitor component.
[0012] As an optional solution, the power component is arranged outside the heat dissipation duct.
[0013] As an optional solution, the capacitor assembly includes a plurality of capacitors, gaps are provided between adjacent capacitors, and airflow can pass through the gaps between adjacent capacitors.
[0014] As an optional solution, the heat dissipation cavity includes a first cavity and a second cavity that are connected to each other, the heat dissipation end of the heat dissipation component is in the first cavity, the capacitor component is arranged in the second cavity, the air inlet is arranged on one of the first cavity and the second cavity, and the air outlet is arranged on the other of the first cavity and the second cavity.
[0015] As an optional solution, a via is provided on the heat dissipation cavity, and the connection terminal of the capacitor component extends out from the via.
[0016] As an optional solution, a sealing member is provided between the via hole and the wiring terminal.
[0017] The converter includes a cabinet and at least one power module as described above, wherein the power module is arranged in the cabinet, and the air inlet and the air outlet are connected to the outside of the cabinet.
[0018] As an optional solution, an air collecting cavity is provided in the cabinet, the air collecting cavity is communicated with the heat dissipation air duct, and the air collecting cavity is communicated with the outside of the cabinet.
[0019] As an optional solution, when there are multiple power modules, the heat dissipation ducts of the multiple power modules are all connected to the same air collecting cavity.
[0020] As an optional solution, the air collecting cavity is arranged at one end of the heat dissipation duct close to the heat dissipation component.
[0021] As an optional solution, the converter further includes:
[0022] At least one heat exchange fan is disposed in the air collecting cavity and is used for blowing air into the air collecting cavity or extracting the air flow in the air collecting cavity to the outside of the cabinet.
[0023] Beneficial effects:
[0024] The power module proposed by the utility model dissipates heat for the power component by setting a heat dissipation component, and dissipates the heat dissipation end of the heat dissipation component in the heat dissipation air duct, so as to perform heat exchange with the airflow in the heat dissipation air duct, accelerate the heat dissipation and cooling of the heat dissipation component, and thus can provide a better heat dissipation and cooling effect for the power component. At the same time, the capacitor component is arranged in the heat dissipation air duct, so that the capacitor component can perform heat exchange with the airflow in the heat dissipation air duct to achieve the purpose of heat dissipation. Since the airflow in the heat dissipation air duct has a flow trend from the air inlet to the air outlet, the airflow in the heat dissipation air duct forms a fast flow, so that the capacitor component and the power component can be efficiently dissipated, and the heat of the capacitor component and the power component is quickly dissipated, so as to ensure that the power module can work normally. Furthermore, the capacitor component and the power component share the heat dissipation air duct, and there is no need to additionally set a radiator for the capacitor component, so that the overall structure of the power module is relatively simple, and the overall heat dissipation cost of the power module is reduced.
[0025] The converter proposed by the utility model improves the heat dissipation effect by adopting the above-mentioned power module, which is conducive to maintaining normal operation for a long time.
[0026] The inverter proposed by the utility model has an air inlet and an air outlet of the heat dissipation duct directly connected to the outside of the cabinet, and the heat dissipation duct is not connected to other spaces inside the cabinet. The airflow in the heat dissipation duct will not flow through the power components, thereby preventing the airflow containing wind, sand and salt mist from the outside from entering the power components, forming efficient protection for the power components and other electrical components in the cabinet, so that the inverter can be suitable for complex and harsh environments such as wind, sand and salt mist. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a structural schematic diagram of a converter provided by an embodiment of the utility model;
[0028] Figure 2 It is a structural schematic diagram of the converter (excluding the cabinet) provided in an embodiment of the utility model;
[0029] Figure 3 This is a schematic diagram of the structure of the power module provided by the embodiment of the utility model Figure 1 ;
[0030] Figure 4 This is a schematic diagram of the structure of the power module (excluding the busbar) provided in the embodiment of the utility model Figure 1 ;
[0031] Figure 5 This is a schematic diagram of the structure of the power module provided by the embodiment of the utility model Figure 2 ;
[0032] Figure 6 This is a schematic diagram of the structure of the power module (excluding the busbar) provided in the embodiment of the utility model Figure 2 ;
[0033] Figure 7 This is a schematic diagram of the air flow trajectory in the heat dissipation duct provided by the embodiment of the utility model. Figure 1 ;
[0034] Figure 8 This is a schematic diagram of the air flow trajectory in the heat dissipation duct provided by the utility model. Figure 2 ;
[0035] Fig. 9 The internal structure of the converter provided by the embodiment of the utility model is shown in FIG. Figure 1 ;
[0036] Fig.10 The internal structure of the converter provided by the embodiment of the utility model is shown in FIG. Figure 2 ;
[0037] Fig.11 It is a structural schematic diagram of the air collecting cavity provided by an embodiment of the utility model.
[0038] In the figure:
[0039] 100. Power module;
[0040] 1. Power components;
[0041] 2. heat dissipation component; 21. heat dissipation fin;
[0042] 3. heat dissipation cavity; 301. heat dissipation air duct; 311. air flow trajectory; 302. air inlet; 303. air outlet; 31. first cavity; 32. second cavity;
[0043] 4. capacitor assembly; 41. capacitor; 411. terminal;
[0044] 5. Busbar; 6. AC copper busbar; 7. Seal;
[0045] 200. Heat exchange fan;
[0046] 300, cabinet; 310, first communication hole; 320, second communication hole;
[0047] 400, air collecting cavity; 410, fan vent; 420, heat dissipation vent. DETAILED DESCRIPTION
[0048] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.
[0049] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0050] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0051] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.
[0052] like Figure 1 and Figure 2 As shown, this embodiment provides a converter, including a cabinet 300 and at least one power module 100. The power module 100 is arranged in the cabinet 300. The heat dissipation of the power module 100 directly affects the operation and service life of the converter. In this embodiment, six power modules 100 are arranged in sequence from left to right in the cabinet 300. Of course, the number of power modules 100 is not limited to this, and more or less than six can be set as needed.
[0053] like Figure 3 and Figure 4As shown, it is a structural schematic diagram of a single power module 100. The power module 100 includes a power component 1 and a capacitor component 4. In order to achieve efficient heat dissipation of the power component 1 and the capacitor component 4 at the same time, the structure of the power module 100 is improved in this embodiment. Specifically, the power module 100 also includes a heat dissipation component 2 and a heat dissipation cavity 3. The heat dissipation component 2 is arranged on one side of the power component 1 for dissipating heat from the power component 1. A heat dissipation duct 301 is formed inside the heat dissipation cavity 3. The heat dissipation cavity 3 is provided with an air inlet 302 and an air outlet 303. The air inlet 302 and the air outlet 303 are both connected to the outside of the cabinet 300. The airflow in the heat dissipation duct 301 has a flow trend from the air inlet 302 to the air outlet 303. The heat dissipation end of the heat dissipation component 2 (the heat dissipation fin 21 in this embodiment) is arranged in the heat dissipation duct 301 to achieve heat dissipation of the power component 1 through heat exchange through the heat dissipation duct 301. The capacitor assembly 4 is disposed in the heat dissipation duct 301 , and the airflow in the heat dissipation duct 301 flows through the capacitor assembly 4 to achieve heat dissipation of the capacitor assembly 4 .
[0054] The heat dissipation component 2 is provided to dissipate heat for the power component 1, and the heat dissipation end of the heat dissipation component 2 is provided in the heat dissipation duct 301 to exchange heat with the airflow in the heat dissipation duct 301, so as to accelerate the heat dissipation and cooling of the heat dissipation component 2, thereby providing a better heat dissipation and cooling effect for the power component 1. At the same time, the capacitor component 4 is provided in the heat dissipation duct 301, so that the capacitor component 4 can exchange heat with the airflow in the heat dissipation duct 301 to achieve the purpose of heat dissipation. Since the airflow in the heat dissipation duct 301 has a flow trend from the air inlet 302 to the air outlet 303, the airflow in the heat dissipation duct 301 forms a fast flow, so that the capacitor component 4 and the power component 1 can be efficiently dissipated, and the heat of the capacitor component 4 and the power component 1 can be quickly dissipated, thereby ensuring that the power module 100 can work normally. Furthermore, the capacitor component 4 and the power component 1 share the heat dissipation duct 301, and there is no need to set up an additional radiator for the capacitor component 4, so that the overall structure of the power module 100 is relatively simple, and the overall heat dissipation cost of the power module 100 is reduced.
[0055] As the application environment of wind, sand, salt spray, etc. becomes more and more normalized, the protection requirements for the converter are getting higher and higher. In order to improve the protection level of the converter and prevent the airflow in the heat dissipation duct 301 from blowing onto the power component 1, the power component 1 is arranged outside the heat dissipation duct 301, and the air inlet 302 and the air outlet 303 of the heat dissipation duct 301 are connected to the outside of the cabinet 300, so as to protect the power component 1 from being affected by the airflow in the heat dissipation duct 301.
[0056] The heat dissipation duct 301 is directly connected to the outside of the cabinet 300 through the air inlet 302 and the air outlet 303. The heat dissipation duct 301 is not connected to other spaces inside the cabinet 300. The airflow in the heat dissipation duct 301 will not flow through the power component 1, thereby preventing the airflow containing wind, sand and salt mist from the outside from entering the power component 1, forming efficient protection for the power component 1 and other electrical components in the cabinet 300, so that the converter can be applied to complex and harsh environments such as wind, sand and salt mist.
[0057] Alternatively, if Figure 4 As shown, a gap is provided between the capacitor assembly 4 and the inner wall of the heat dissipation cavity 3, so that airflow can pass through the gap between the capacitor assembly 4 and the heat dissipation cavity 3, thereby ensuring smooth flow of airflow.
[0058] The capacitor assembly 4 includes multiple capacitors 41. In order to increase the contact area between the airflow and the capacitors and improve the heat dissipation effect, gaps are set between adjacent capacitors 41. The airflow can pass through the gaps between adjacent capacitors 41, so that the airflow has less resistance when flowing through the capacitor assembly 4, the flow rate is higher, and the contact area with the capacitors 41 is larger, which helps to improve the heat exchange efficiency between the airflow in the heat dissipation cavity 3 and the capacitor assembly 4 and the heat dissipation assembly 2.
[0059] Alternatively, if Figure 3 and Figure 4 As shown, a via hole is provided on the heat dissipation cavity 3, and the terminal 411 of the capacitor assembly 4 extends out from the via hole to achieve the connection between the capacitor 41 and the busbar 5. Specifically, a plurality of via holes are provided, and one via hole is provided corresponding to each capacitor 41, so that all the plurality of terminal 411 of the capacitor assembly 4 are exposed from the heat dissipation cavity 3.
[0060] In order to prevent the airflow in the heat dissipation duct 301 from leaking out of the via hole and affecting the power component 1, a seal 7 is provided between the via hole and the capacitor 41. The seal 7 can block the gap between the via hole and the capacitor 41 to improve the sealing performance. The seal 7 can specifically be a sealing ring. In one embodiment, the sealing ring is sleeved on the outer periphery of the capacitor 41, and is embedded into the via hole with the capacitor 41. The capacitor 41 and the inner wall of the via hole clamp the sealing ring, thereby sealing the gap between the capacitor 41 and the via hole. In another embodiment, the sealing ring can also be buckled on the end of the capacitor 41 to cover the via hole, so that the terminal 411 can be exposed through the sealing ring.
[0061] Alternatively, if Figure 4 As shown, the heat dissipation cavity 3 includes a first cavity 31 and a second cavity 32 which are connected to each other. The heat dissipation end of the heat dissipation component 2 is arranged in the first cavity 31, and the capacitor component 4 is arranged in the second cavity 32. An air inlet 302 is arranged on one of the first cavity 31 and the second cavity 32, and an air outlet 303 is arranged on the other of the first cavity 31 and the second cavity 32.
[0062] In an optional embodiment, if Figure 4 As shown, an air inlet 302 is provided on the lower side of the second cavity 31, and an air outlet 303 is provided on the front side of the first cavity 32. Figure 5 and Figure 6 As shown, an air outlet 303 is provided on the rear side of the first cavity 32 . Figure 7 The figure shows the airflow trajectory 311 in the first cavity 31 and the second cavity 32. The external airflow enters the first cavity 31 from the air inlet 302, exchanges heat with the heat dissipation fins 21 to dissipate heat for the power component 1, and then the airflow continues to flow upward to the second cavity 32, exchanges heat with the capacitor component 4 to dissipate heat for the capacitor component 4, and then flows out from the air outlet 303.
[0063] In an optional embodiment, if Figure 8 As shown, an air outlet 303 is provided on the lower side of the second cavity 31, and an air inlet 302 is provided on the rear side (or front side) of the first cavity 32. External airflow enters the second cavity 32 from the air inlet 302, performs heat exchange with the capacitor component 4 to dissipate heat from the capacitor component 4, and then continues to flow downward into the first cavity 31, performs heat exchange with the heat dissipation fins 21 to dissipate heat from the power component 1, and then flows out from the air outlet 303.
[0064] In the above two embodiments, the airflow in the heat dissipation duct 301 does not contact the internal components of the cabinet 300, such as the power component 1, the busbar 5, the AC copper busbar 6 and other structures, thereby preventing salt spray, dust and the like in the airflow from affecting these internal components.
[0065] Optionally, the air inlet 302 and the air outlet 303 are connected to the outside of the cabinet 300. In order to achieve the connection between the air inlet 302 and the air outlet 303 and the outside of the cabinet 300, as shown in FIG. Fig. 9 and Fig.10 As shown, a first communication hole 310 and a second communication hole 320 are provided on the cabinet 300, the first communication hole 310 is communicated with the air inlet 302, and the second communication hole 320 is communicated with the air outlet 303, so that external air enters the heat dissipation duct 301 from the first communication hole 310 and the air inlet 302, and is discharged to the outside of the cabinet 300 through the air outlet 303 and the second communication hole 320. Specifically, a sealing member, such as a sealing ring, is provided at the connection between the heat dissipation duct 301 and the first communication hole 310 and the second communication hole 320 to prevent the airflow in the heat dissipation duct 301 from dispersing into other spaces in the cabinet 300.
[0066] Alternatively, if Fig. 9 and Fig.10As shown, an air collecting cavity 400 is provided in the cabinet 300, the air collecting cavity 400 is connected with the heat dissipation duct 301, and the air collecting cavity 400 is connected to the outside of the cabinet 300. Specifically, the air collecting cavity 400 is provided on the bottom side of the first cavity 31, located at one end of the heat dissipation duct 301 close to the heat dissipation component 2, and the air collecting cavity 400 is connected with the first connecting hole 310 or the second connecting hole 320 on the cabinet 300. When multiple power modules 100 are provided, the heat dissipation ducts 301 of multiple power modules 100 are all connected to the same air collecting cavity 400. By providing the air collecting cavity 400, the heat dissipation ducts 301 of multiple power components 1 are connected, so that the centralized control of the airflow in the heat dissipation duct 301 can be achieved.
[0067] like Fig. 9 and Fig.10 As shown, the inverter also includes at least one heat exchange fan 200, which is arranged in the air collecting cavity 400, specifically on the lower side of the air collecting cavity 400. The heat exchange fan 200 is used to blow air into the air collecting cavity 400 or extract the air flow in the air collecting cavity 400 to the outside of the cabinet 300, so that the air flow in the heat dissipation duct 301 flows from the air inlet 302 to the air outlet 303, thereby accelerating the flow of air in the heat dissipation duct 301.
[0068] Alternatively, if Fig.11 As shown, a plurality of fan vents 410 are provided on the lower side of the air collecting cavity 400, and the fan vents 410 are aligned with the heat exchange fan 200. A plurality of heat dissipation vents 420 are provided on the upper side of the air collecting cavity 400, and the heat dissipation vents 420 are aligned with the heat dissipation duct 301, so as to achieve communication between the heat exchange fan 200 and the heat dissipation duct 301.
[0069] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.
Claims
1. A power module, characterized in that: include: Power component (1); A heat dissipation component (2), the heat dissipation component (2) being arranged on one side of the power component (1) and being used to dissipate heat from the power component (1); A heat dissipation cavity (3), wherein a heat dissipation air duct (301) is formed inside the heat dissipation cavity (3), the heat dissipation cavity (3) is provided with an air inlet (302) and an air outlet (303), the airflow in the heat dissipation air duct (301) has a flow trend from the air inlet (302) to the air outlet (303), and the heat dissipation end of the heat dissipation component (2) is located in the heat dissipation air duct (301); The capacitor component (4) is arranged in the heat dissipation air duct (301), and the air flow in the heat dissipation air duct (301) flows through the capacitor component (4).
2. The power module according to claim 1, characterized in that: The power component (1) is arranged outside the heat dissipation duct (301).
3. The power module according to claim 1, characterized in that: The heat dissipation cavity (3) comprises a first cavity (31) and a second cavity (32) which are connected to each other; the heat dissipation end of the heat dissipation component (2) is located in the first cavity (31); the capacitor component (4) is arranged in the second cavity (32); the air inlet (302) is arranged on one of the first cavity (31) and the second cavity (32); and the air outlet (303) is arranged on the other of the first cavity (31) and the second cavity (32).
4. The power module according to any one of claims 1 to 3, characterized in that: The heat dissipation cavity (3) is provided with a via hole, and the connection terminal (411) of the capacitor component (4) extends out from the via hole.
5. The power module according to claim 4, characterized in that: A sealing member (7) is provided between the via hole and the capacitor assembly (4).
6. A converter, comprising a cabinet (300), characterized in that: It also includes at least one power module according to any one of claims 1 to 5, wherein the power module is arranged in the cabinet (300), and the air inlet (302) and the air outlet (303) are connected to the outside of the cabinet (300).
7. The converter according to claim 6, characterized in that An air collecting cavity (400) is provided in the cabinet (300), the air collecting cavity (400) is connected to the heat dissipation air duct (301), and the air collecting cavity (400) is connected to the outside of the cabinet (300).
8. The converter according to claim 7, characterized in that: When a plurality of power modules are provided, the heat dissipation air ducts (301) of the plurality of power modules are all connected to the same air collecting cavity (400).
9. The converter according to claim 7, characterized in that: The air collecting cavity (400) is arranged at one end of the heat dissipation air duct (301) close to the heat dissipation component (2).
10. The converter according to claim 7, characterized in that: The converter further comprises: At least one heat exchange fan (200), the heat exchange fan (200) being arranged in the air collecting cavity (400) and being used for blowing air into the air collecting cavity (400) or extracting the airflow in the air collecting cavity (400) to the outside of the cabinet (300).