inverter

Abstract

The utility model discloses an inverter, the inverter includes heat abstractor, box and power device. The power device sets up in the box, the heat abstractor includes setting up the heat abstractor and airflow injection device outside the box, the airflow injection device has and smooth curved surface drainage wall of air outlet, the air outlet with the heat abstractor is opposite and is arranged in the first direction, the curved surface drainage wall extends to the direction close to the heat abstractor, the curved surface drainage wall sets up at the air outlet, is used for guiding the gas that is spouted by the air outlet to adhere to curved surface drainage wall flow. Therefore, the inverter of the utility model embodiment has the advantage that the heat abstractor is good.

Description

Technical Field

[0001] This utility model relates to the field of inverter technology, and specifically to an inverter. Background Technology

[0002] An inverter is a power regulation device composed of semiconductor devices, primarily used to convert direct current (DC) power into alternating current (AC) power. It typically consists of a boost circuit and an inverter bridge circuit. Inverters usually contain power devices with relatively high output power, resulting in significant heat generation. Ineffective heat dissipation during prolonged operation shortens the inverter's lifespan. In related technologies, heat sinks are often installed on the inverter casing to address the heat dissipation problem of the power devices, but these methods suffer from poor heat dissipation performance. Utility Model Content

[0003] In view of this, the present invention aims to provide an inverter that solves the problem of poor heat dissipation capacity of inverters in the prior art.

[0004] This utility model provides an inverter.

[0005] The inverter of this utility model embodiment includes a heat dissipation assembly, a housing, and power devices.

[0006] The power device is disposed inside the housing, and the heat dissipation assembly includes a heat sink and an airflow jet device disposed outside the housing. The airflow jet device has a jet nozzle and a smooth curved guide wall. The jet nozzle is disposed opposite to the heat sink in a first direction. The curved guide wall extends toward the heat sink and is disposed at the jet nozzle to guide the gas ejected from the jet nozzle to flow along the curved guide wall.

[0007] The inverter of this embodiment utilizes a curved guide wall at the nozzle, causing the ejected air to tend to adhere to this wall. When the mainstream gas approaches the curved guide wall, a low-pressure zone is formed around it. The external atmospheric pressure "presses" the airflow towards the curved surface, causing it to flow close to the surface. This high-speed airflow then drives the surrounding air, drawing in a large amount of surrounding air and causing it to flow forward with the main airflow (Coanda effect), achieving a "small input, large output" airflow amplification effect. This significantly improves the heat dissipation effect.

[0008] Therefore, the inverter of this utility model embodiment has the advantage of good heat dissipation.

[0009] In one embodiment, the airflow injection device includes an airflow injection element and a base. The airflow injection element is used to generate airflow through the jet nozzle. The base has a communicating airflow channel and a receiving cavity, and the jet nozzle communicating with the airflow channel is formed on the base. The airflow injection element is disposed in the receiving cavity, and a portion of the outer wall surface of the base forms the curved flow guide wall.

[0010] In some embodiments, the base includes a flow guide and a base body connected sequentially along a second direction. Both the flow guide and the base body are hollow structures. The base body has the receiving cavity, and the flow guide has the airflow channel and the jet nozzle. The second direction is perpendicular to the first direction.

[0011] In some embodiments, the flow guide includes a first branch pipe and a second branch pipe spaced apart along a third direction, both the first branch pipe and the second branch pipe extending along the second direction, and both the first branch pipe and the second branch pipe being provided with the jet nozzle and the curved flow guide wall.

[0012] In some embodiments, the first branch pipe and the second branch pipe are connected by an arc transition at both ends along the second direction to form an annular flow guide shroud. The annular flow guide shroud has an annular airflow channel and an annularly distributed jet nozzles. The height of the jet nozzle of each of the first branch pipe and the second branch pipe in the third direction does not exceed the heat sink. The first direction, the second direction and the third direction are arranged perpendicularly.

[0013] In some embodiments, a portion of the inner wall of the annular guide shroud forms the circumferentially arranged curved guide wall and nozzle slits, the annular nozzle slits forming continuous air jets, and the air jets being inclined relative to the first direction to guide the airflow to adhere to the inner wall.

[0014] In some embodiments, the annular air guide includes a first air guide plate and a second air guide plate, the first air guide plate and the second air guide plate forming the airflow channel, the air guide surface of the first air guide plate and the air guide surface of the second air guide plate forming the nozzle slit, each of the first air guide plate and the second air guide plate having a semi-annular tube structure, the first air guide plate extending and bending along the nozzle slit, and the second air guide plate forming the curved flow guide wall in the area forming the nozzle slit.

[0015] In some embodiments, the outer ends of the first air guide plate and the second air guide plate are connected. The first air guide plate is bent and extended toward the end of the annular air guide shroud toward the inner wall of the second air guide plate. At the inner end, there is a gap between the end of the inner wall of the first air guide plate and the inner side of the outer wall of the second air guide plate to form the nozzle slit.

[0016] In some embodiments, the housing has an adjacent first side and a second side, the area of ​​the first side is larger than that of the second side, the power device is disposed in the area of ​​the housing near the first side, and each of the heat sink and the airflow jet device is disposed on the outer wall surface of the first side. In some embodiments, the heat sink includes heat sink fins and a heat sink substrate. The heat sink substrate is attached to the housing. Adjacent heat sink fins are spaced apart on the heat sink substrate in a second direction to form a heat sink channel extending in a first direction between two adjacent heat sink fins. The first direction and the second direction are perpendicular to each other.

[0017] In some embodiments, the power device includes a PCB board, a heating element, and a capacitor. The heating element is connected to the first surface of the housing, and the PCB board is connected to the first surface through a thermally conductive layer. Attached Figure Description

[0018] Figure 1 This is a perspective view of an inverter according to an embodiment of the present invention.

[0019] Figure 2 This is a perspective view of the airflow jet component according to an embodiment of the present invention.

[0020] Figure 3 This is a perspective view of the heat sink component according to an embodiment of the present invention.

[0021] Figure 4 This is another perspective view of the inverter according to an embodiment of the present invention.

[0022] Figure 5 This is a cross-sectional view of the heat dissipation component and the housing in an embodiment of this utility model.

[0023] Figure 6 This is a longitudinal cross-sectional view of the heat dissipation component and the housing in an embodiment of this utility model.

[0024] Explanation of reference numerals in the attached figures: Box 1; First side 101; Second side 102; Heat dissipation component 2; heat sink 21; heat dissipation base plate 211; heat dissipation fins 212; Air jet component 22; Base 23; shroud 231; first air guide plate 2311; second air guide plate 2312; jet nozzle 2313; curved flow guide wall 2314; The first division is in charge of 201; the second division is in charge of 202. Base body 232. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] The Coanda effect, also known as the wall adhesion effect, is an important phenomenon in fluid mechanics. When a fluid (such as air or water) is ejected from a nozzle, it tends to adhere to a nearby curved or inclined surface rather than continue flowing in a straight line. This phenomenon is called the Coanda effect. Because fluids have viscosity, they can carry surrounding stationary fluids along with them (entrainment effect). When the main flow approaches a curved surface, a low-pressure zone is formed on its outer side. The external pressure "pushes" the fluid towards the curved surface, causing it to flow tightly against the surface.

[0027] The following is for reference. Figures 1-6 The inverter of this utility model will be described by way of example.

[0028] The inverter of this embodiment includes a heat dissipation assembly 2, a housing 1, and power devices (not shown). The power devices are disposed inside the housing 1. The heat dissipation assembly 2 includes a heat sink 21 disposed outside the housing 1 and an airflow injection device. The airflow injection device has a jet nozzle 2313 and a smooth curved guide wall 2314. The jet nozzle 2313 is disposed opposite to the heat sink 21 in a first direction. The curved guide wall 2314 extends toward the heat sink 21 and is disposed at the jet nozzle 2313 to guide the gas ejected from the jet nozzle 2313 to adhere to the curved guide wall 2314 and flow.

[0029] The inverter of this embodiment of the invention, by setting a curved guide wall 2314 at the jet nozzle 2313, causes the ejected air to tend to flow onto the curved guide wall 2314. When the mainstream gas is close to the curved guide wall 2314, a low-pressure zone is formed around it. The external atmospheric pressure "presses" the airflow toward the curved surface, causing it to flow close to the surface. In turn, the high-speed airflow drives the surrounding air to move, and a large amount of surrounding air is "drawn in" and flows forward with the main airflow (Coanda effect), achieving a "small input, large output" airflow amplification effect. As a result, the heat dissipation effect is greatly improved.

[0030] Therefore, the inverter of this utility model embodiment has the advantage of good heat dissipation.

[0031] like Figure 2 and Figure 6 As shown, the airflow jet device includes an airflow jet member 22 and a base 23. The airflow jet member 22 is used to generate airflow through the jet nozzle 2313. The base 23 has a communicating airflow channel and a receiving cavity, and a jet nozzle 2313 communicating with the airflow channel is formed on the base 23. The airflow jet member 22 is disposed in the receiving cavity, and a portion of the outer wall surface of the base 23 forms a curved guide wall 2314.

[0032] The inverter of this embodiment of the utility model divides the airflow injection device into an airflow injection element 22 and a base 23, and sets the airflow injection element 22 in the receiving cavity of the base 23, making the overall structure more compact. At the same time, a portion of the outer wall surface of the base 23 forms a curved flow guide wall 2314, which can better guide the airflow to adhere and flow, further enhancing the heat dissipation effect.

[0033] A portion of the outer wall of the base 23 forms a curved flow guide wall 2314, eliminating the need for an additional flow guide shroud 231. The integrated design of the airflow channel, nozzle 2313, and curved flow guide wall 2314 improves structural integration and reduces assembly errors. The airflow enters the airflow channel from the receiving cavity, then flows through the nozzle 2313 to the curved flow guide wall 2314. This relatively continuous path helps reduce friction and separation losses, and improves airflow velocity and stability.

[0034] like Figure 2 and Figure 6 As shown, the base 23 includes a flow guide 231 and a base body 232 connected sequentially along a second direction. Both the flow guide 231 and the base body 232 are hollow structures. The base body 232 has a receiving cavity, and the flow guide 231 has an airflow channel and a jet nozzle 2313. The second direction is perpendicular to the first direction. It can be understood that the airflow jet 22 is disposed on one side of the airflow channel in the second direction, and the air outlet side is along the first direction.

[0035] The inverter of this utility model embodiment divides the base 23 into a shroud 231 and a base body 232 connected sequentially along a second direction. Airflow can travel within the base body 232 along the second direction (e.g., ...). Figure 1 The airflow (as shown in the left-right direction) flows and, after entering the deflector 231, turns 90° through the internal channel, along the first direction (e.g., Figure 1 As shown in the diagram, the airflow is ejected in the vertical direction, achieving an efficient 90° turn in airflow direction. This structural design allows the airflow to flow more smoothly within the airflow channel, and after being ejected from the jet nozzle 2313, it better cooperates with the curved guide wall 2314, improving heat dissipation efficiency. Moreover, the optimized spatial layout achieves a "horizontal air intake, vertical air outlet" layout, saving lateral space.

[0036] like Figure 2 and Figure 6 As shown, the fairing 231 has a third direction (e.g., Figure 1 The first branch pipe 201 and the second branch pipe 202 are arranged at intervals in the front-back direction shown in the figure. Both the first branch pipe 201 and the second branch pipe 202 extend along the second direction. Both the first branch pipe 201 and the second branch pipe 202 are provided with a jet nozzle 2313 and a curved flow guide wall 2314.

[0037] The inverter of this utility model divides the air guide shroud 231 into a first branch pipe 201 and a second branch pipe 202 arranged at intervals along a third direction. This multi-branch design can increase the amount of airflow ejected and the coverage range, which can increase the air volume to a certain extent, thereby improving the overall heat dissipation performance.

[0038] Furthermore, such as Figure 2 and Figure 6 As shown, the first branch pipe 201 and the second branch pipe 202 are connected by an arc transition at both ends along the second direction to form an annular flow guide shroud 231. The annular flow guide shroud 231 has an annular airflow channel and annularly distributed jet nozzles 2313. The height of the jet nozzles 2313 of each of the first branch pipe 201 and the second branch pipe 202 in the third direction does not exceed the setting of the heat sink 21. The first direction, the second direction and the third direction are vertically arranged.

[0039] The inverter of this utility model is formed by arc transition connection of the first branch pipe 201 and the second branch pipe 202 at both ends along the second direction to form an annular guide shroud 231, thereby forming a smooth transition airflow bend inside, avoiding the resistance to airflow caused by right angle transition, thereby reducing airflow resistance and energy loss, which is beneficial to improving the air outlet speed and air volume and reducing wind noise.

[0040] like Figure 2 and Figure 6 As shown, a portion of the inner wall of the annular guide shroud 231 forms a circumferentially arranged curved guide wall 2314 and a nozzle slit. The annular nozzle slit forms a continuous air jet 2313, and the air jet 2313 is inclined relative to the first direction to guide the airflow to adhere to the inner wall.

[0041] The inverter of this embodiment enhances air entrainment and the stability of the Coanda effect by forming a circumferentially arranged curved air-guiding wall 2314 on a portion of the inner wall of the annular shroud 231. Airflow is synchronously output from the entire annular region, resulting in a large outlet diameter and area, and a wider overall air volume coverage. Furthermore, by utilizing the Bernoulli effect, the airflow generated by the fan is amplified, achieving an air multiplier effect, thereby reducing the number of fans required while improving the overall heat dissipation effect.

[0042] like Figure 2 and Figure 6 As shown, the annular air deflector 231 includes a first air guide plate 2311 and a second air guide plate 2312. The first air guide plate 2311 and the second air guide plate 2312 form an airflow channel. A nozzle slit is formed between the air guide surfaces of the first air guide plate 2311 and the second air guide plate 2312. Each of the first air guide plate 2311 and the second air guide plate 2312 has a semi-annular tubular structure. The first air guide plate 2311 bends and extends along the nozzle slit, and the second air guide plate 2312 forms a curved airflow guide wall 2314 in the area forming the nozzle slit. It can be understood that the first air guide plate 2311 ensures the stable ejection of the high-speed main airflow, and the second air guide plate 2312 drives the surrounding airflow out through the curved airflow guide.

[0043] The inverter of this embodiment of the utility model divides the annular air guide shroud 231 into independent first air guide plate 2311 and second air guide plate 2312. The air guide plates can be injection molded, inspected and assembled separately, which can reduce the manufacturing difficulty of individual parts. The second air guide plate 2312 with different curvatures can be replaced to adapt to different air volume requirements. In addition, the first air guide plate 2311 extends inward along the opening, which is equivalent to a guide wing or fairing, guiding the air from the airflow channel of the base 23 to smoothly transition to the nozzle slit, avoiding the formation of vortices or separation of airflow at corners; at the same time, the second air guide plate 2312 forms a curved air guide wall 2314 to guide the gas outflow and improve the overall aerodynamic efficiency.

[0044] like Figure 2 and Figure 6 As shown, the outer ends of the first air guide plate 2311 and the second air guide plate 2312 are connected. The first air guide plate 2311 extends from the inner end of the annular air guide shroud 231 toward the end of the second air guide plate 2312. At the inner end, there is a gap between the end of the inner wall of the first air guide plate 2311 and the inner side of the outer wall of the second air guide plate 2312 to form a nozzle slit that communicates with the airflow channel.

[0045] The inverter of this utility model embodiment, through the unique connection method and structural setting of the first air guide plate 2311 and the second air guide plate 2312, not only ensures the continuity of the airflow channel, allowing the airflow to smoothly enter the nozzle slit from the airflow channel, but also the design of the first air guide plate 2311 extending in the opposite direction and wrapping around the end of the inner wall of the second air guide plate 2312 can guide and rectify the airflow to a certain extent, reduce the turbulence of the airflow when passing through the nozzle slit, further improve the stability of the airflow and the air outlet efficiency, and thus improve the heat dissipation effect of the heat dissipation component 2 on the power devices.

[0046] like Figure 1As shown, the housing 1 has an adjacent first surface 101 and a second surface 102. The area of ​​the first surface 101 is larger than that of the second surface 102. The power device is disposed in the area of ​​the housing 1 near the first surface 101. The heat sink 21 and the air jet device are each disposed on the outer wall surface of the first surface 101.

[0047] The inverter of this utility model arranges the power devices in a concentrated manner inside the housing 1 near the larger area of ​​the first surface 101, while placing the heat sink 21 and the air jet device on the outer wall of the first surface 101. This brings the heat source closer to the heat sink, reduces the heat transfer path inside the housing 1, and thus reduces thermal resistance. It can also more quickly conduct the heat generated by the power devices to the heat sink 21 and the air jet device, thereby improving heat dissipation efficiency.

[0048] like Figure 3 and Figure 6 As shown, the heat sink 21 includes heat sink fins 212 and heat sink substrate 211. The heat sink substrate 211 is attached to the housing 1. Adjacent heat sink fins 212 are spaced apart on the heat sink substrate 211 in a second direction to form a heat dissipation channel extending in a first direction between two adjacent heat sink fins 212. The first direction and the second direction are perpendicular to each other.

[0049] The inverter of this embodiment of the invention designs the heat sink 21 as heat sink fins 212 and forms a heat dissipation channel extending along a first direction between adjacent heat sink fins 212, allowing air to flow smoothly within the heat dissipation channel. This enables more effective heat exchange between the airflow ejected by the air jet device and the heat sink fins 212 when the airflow passes through the heat dissipation channel, carrying away the heat from the fins 212. Simultaneously, the heat sink fins 212 are spaced apart in a second direction, increasing the heat dissipation area and improving heat dissipation efficiency. Furthermore, this vertical heat dissipation channel arrangement facilitates airflow along a specific path, avoiding airflow turbulence and further enhancing the heat dissipation effect.

[0050] Optionally, the heat dissipation fins 212 are corrugated heat dissipation fins. This type of heat dissipation fin 212 has the advantage of good heat dissipation effect.

[0051] Optionally, the power device includes a PCB board, a heating element, and a capacitor. The heating element is connected to the first surface 101 of the housing 1, and the PCB board is connected to the first surface 101 through a thermally conductive layer.

[0052] The inverter of this embodiment directly connects the heating element to the first surface 101 of the housing 1, and the PCB board is connected to the first surface 101 through a thermally conductive layer. This design allows the heat generated by the heating element to be quickly conducted to the housing 1, and then the heat is quickly dissipated by the heat sink 21 and airflow jet device provided on the outer wall of the first surface 101 of the housing 1. At the same time, the thermally conductive layer acts as a good heat conduction bridge, ensuring that the heat generated on the PCB board can also be efficiently transferred to the housing 1 for heat dissipation.

[0053] Optionally, the thermally conductive layer may include a stacked arrangement of thermally conductive materials and ceramic pads.

[0054] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications or equivalent substitutions made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0055] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0056] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0057] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0058] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0059] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0060] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An inverter, characterized in that, include: A housing and power devices, wherein the power devices are disposed within the housing; A heat dissipation assembly includes a heat dissipation component disposed outside the housing and an airflow jetting device. The airflow jetting device has a jet nozzle and a smooth curved guide wall. The jet nozzle is disposed opposite to the heat dissipation component in a first direction. The curved guide wall extends toward the heat dissipation component and is disposed at the jet nozzle to guide the gas ejected from the jet nozzle to flow and adhere to the curved guide wall.

2. The inverter according to claim 1, characterized in that, The airflow injection device includes an airflow injection element and a base. The airflow injection element is used to generate airflow through the jet nozzle. The base has a communicating airflow channel and a receiving cavity, and the jet nozzle communicating with the airflow channel is formed on the base. The airflow injection element is disposed in the receiving cavity, and a portion of the outer wall surface of the base forms the curved flow guide wall.

3. The inverter according to claim 2, characterized in that, The base includes a flow guide and a base body connected sequentially along a second direction. Both the flow guide and the base body are hollow structures. The base body has the receiving cavity, and the flow guide has the airflow channel and the jet nozzle. The second direction is perpendicular to the first direction.

4. The inverter according to claim 3, characterized in that, The flow guide includes a first branch pipe and a second branch pipe spaced apart along a third direction. Both the first branch pipe and the second branch pipe extend along the second direction. Both the first branch pipe and the second branch pipe are provided with the air jet and the curved flow guide wall.

5. The inverter according to claim 4, characterized in that, The first branch pipe and the second branch pipe are connected by an arc transition at both ends along the second direction to form an annular flow guide. The annular flow guide has an annular airflow channel and annularly distributed jet nozzles. The height of the jet nozzle of each of the first branch pipe and the second branch pipe in the third direction does not exceed the heat sink. The first direction, the second direction and the third direction are arranged perpendicularly.

6. The inverter according to claim 5, characterized in that, A portion of the inner wall of the annular guide shroud forms the circumferentially arranged curved guide wall and nozzle slits. The annular nozzle slits form continuous air jets, and the air jets are inclined relative to the first direction to guide the airflow to adhere to the inner wall.

7. The inverter according to claim 6, characterized in that, The annular air guide includes a first air guide plate and a second air guide plate, which together form the airflow channel. The air guide surface of the first air guide plate and the air guide surface of the second air guide plate form the nozzle slit. Each of the first air guide plate and the second air guide plate has a semi-annular tube structure. The first air guide plate bends and extends along the nozzle slit, and the second air guide plate forms the curved flow guide wall in the area where the nozzle slit is formed.

8. The inverter according to claim 7, characterized in that, The first air guide plate and the second air guide plate are connected at their outer ends. The first air guide plate bends and extends towards the end of the annular air guide shroud that wraps around the inner wall of the second air guide plate. At the inner end, there is a gap between the end of the inner wall of the first air guide plate and the inner side of the outer wall of the second air guide plate to form the nozzle slit.

9. The inverter according to any one of claims 1-8, characterized in that, The enclosure has an adjacent first side and a second side, the area of ​​the first side is larger than that of the second side, the power device is disposed in the area of ​​the enclosure near the first side, and each of the heat sink and the airflow jet device is disposed on the outer wall surface of the first side. And / or, the heat sink includes heat sink fins and a heat sink substrate, the heat sink substrate is attached to the housing, and adjacent heat sink fins are spaced apart on the heat sink substrate in a second direction to form a heat sink channel extending in a first direction between two adjacent heat sink fins, the first direction and the second direction being perpendicular to each other.

10. The inverter according to claim 9, characterized in that, The power device includes a PCB board, a heating element, and a capacitor. The heating element is connected to the first surface, and the PCB board is connected to the first surface through a thermally conductive layer.

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