Power conversion device

Abstract

The utility model relates to a power conversion device. Comprising a shell provided with a containing cavity and a through hole, the through hole is communicated with the containing cavity, and the shell comprises a limiting unit arranged on the inner wall face of the containing cavity in a protruding mode; the circuit board is arranged in the accommodating cavity; the light guide unit and the light emitting unit are arranged on the circuit board, the light guide unit is arranged in the through hole in a penetrating mode and covers the light emitting unit, and the light guide unit is limited by the limiting unit. Under the limiting effect of the limiting unit, the installation precision of the light guide unit can be improved, the situation that the pouring sealant in the containing cavity leaks to the light emitting unit due to the low installation precision is effectively avoided, and therefore the situation that the light emitting unit cannot transmit light outwards due to the fact that the light emitting unit is shielded by the pouring sealant is avoided; therefore, the failure of the light-emitting unit under the influence of the pouring sealant can be effectively avoided, and the assembly yield of the power conversion device is improved.

Description

Technical Field

[0001] This application relates to the field of new energy technology, and in particular to a power conversion device. Background Technology

[0002] With the rapid development of new energy technologies, solar energy is widely used in daily production and life due to its advantages such as being pollution-free and sustainable. Generally, solar energy can be converted into electrical energy through photovoltaic (PV) power generation technology. The direct current (DC) generated by PV is then converted into alternating current (AC) through a power conversion device. This AC can then be used as electrical energy and fed into the power grid via a connector. The power conversion device includes indicator lights to show the device's operating status. However, for traditional power conversion devices, indicator light malfunctions are prone to occur during assembly, thus reducing the assembly yield of the power conversion device. Utility Model Content

[0003] One of the technical problems addressed by this application is how to improve the assembly yield of power conversion devices.

[0004] A power conversion device, comprising:

[0005] The housing has a receiving cavity and a through hole, the through hole communicating with the receiving cavity, and the housing includes a limiting unit protruding from the inner wall of the receiving cavity;

[0006] Circuit board, disposed within the accommodating cavity; and

[0007] A light guide unit and a light emission unit are provided. The light emission unit is disposed on the circuit board. The light guide unit passes through the through hole and covers the light emission unit. The limiting unit limits the light guide unit.

[0008] In one embodiment, at least one of the following schemes is also included:

[0009] The limiting unit limits the light guide unit along the thickness direction of the housing;

[0010] The limiting unit limits the light guide unit along a direction that is perpendicular to both the thickness direction of the housing and the extension direction of the light guide unit.

[0011] In one embodiment, the limiting unit includes a first limiting member, and the first limiting member abuts against the surface of the light guide unit that is disposed away from the circuit board.

[0012] In one embodiment, the light guiding unit includes a light guiding post and a cover, the cover covering the light-emitting unit, the light guiding post passing through the through hole and connected to the cover, and the first limiting member being adapted to limit the cover.

[0013] In one embodiment, the limiting unit further includes two second limiting members, which are spaced apart along a direction perpendicular to both the thickness direction of the housing and the extension direction of the light guide unit, and the light guide unit is disposed between the two second limiting members.

[0014] In one embodiment, the light guide unit includes a light guide post that passes through the through hole, and the second limiting member abuts against the light guide post.

[0015] In one embodiment, the light guide unit further includes an abutment ring, which is disposed around the light guide post and abuts against the second limiting member.

[0016] In one embodiment, the surface of the abutting ring that abuts against the second limiting member is a plane.

[0017] In one embodiment, a seal is also included, which is sleeved on the light guide unit and is at least partially received in the through hole and abuts between the light guide unit and the housing.

[0018] In one embodiment, the seal includes an interconnected sealing body and a plurality of sealing rings. The sealing body is sleeved on the light guide unit, and the sealing rings are arranged around the sealing body. The plurality of sealing rings are spaced apart along the axial direction of the sealing body.

[0019] In one embodiment, the light guiding unit includes interconnected light guiding posts and two stop portions. The light guiding posts pass through the through hole, the sealing member is sleeved on the light guiding posts, the stop portions are arranged around the light guiding posts, and the sealing member is located between the two stop portions.

[0020] In one embodiment, the housing includes a first housing and a second housing. The first housing includes a top plate and a first outer ring protruding from the top plate. The second housing includes a bottom plate and a second outer ring protruding from the bottom plate. The first outer ring and the second outer ring abut against each other. The circuit board is disposed on the bottom plate.

[0021] The through hole is formed in the first outer ring and the second outer ring, and the limiting unit includes a first limiting member, which protrudes from the top plate.

[0022] In one embodiment, the first shell further includes a first inner ring protruding from the top plate, and a first outer ring surrounding the first inner ring; the second shell further includes a second inner ring protruding from the bottom plate, and a second outer ring surrounding the second inner ring; the first inner ring is inserted in the gap between the second outer ring and the second inner ring; the limiting unit includes a second limiting member protruding from the second inner ring; and the through hole is also formed in the first inner ring and the second inner ring.

[0023] In one embodiment, the light guide unit includes a light guide post and a reinforcing protrusion. The light guide post passes through the through hole, and the reinforcing protrusion protrudes radially from the light guide post and is disposed on the light guide post. The reinforcing protrusion is at least partially received in the gap between the second outer ring and the second inner ring.

[0024] One technical effect of an embodiment of this application is that, under the limiting effect of the limiting unit, the installation accuracy of the light guide unit can be improved, effectively avoiding leakage of potting compound from the accommodating cavity to the light-emitting unit due to low installation accuracy. This avoids the light guide unit being unable to transmit light outward due to the blocking effect of the potting compound on the light-emitting unit, thus effectively preventing the light-emitting unit from malfunctioning under the influence of the potting compound, thereby improving the assembly yield of the power conversion device. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural schematic diagram of a power conversion device provided in one embodiment.

[0026] Figure 2 for Figure 1 A three-dimensional cross-sectional view of the power conversion device shown.

[0027] Figure 3 for Figure 1 A partial three-dimensional structural schematic diagram of the power conversion device shown.

[0028] Figure 4 for Figure 1 A three-dimensional structural diagram of the second shell in the power conversion device shown.

[0029] Figure 5 for Figure 1 The diagram shows a partial three-dimensional structure of the power conversion device, including the light-emitting unit and the sealing component.

[0030] Figure 6 for Figure 1 A three-dimensional cross-sectional view of the sealing element in the power conversion device shown.

[0031] Reference numerals: power conversion device 10, housing 100, accommodating cavity 130, through hole 140, first housing 110, top plate 111, first outer ring 112, first inner ring 113, second housing 120, bottom plate 121, second outer ring 122, second inner ring 123, limiting unit 130, first limiting member 131, second limiting member 132, circuit board 200, light guide unit 310, light guide column 311, cover member 312, abutment ring 313, plane 3131, stop part 314, reinforcing protrusion 315, light-emitting unit 320, sealing member 400, sealing body 410, sealing protrusion ring 420. Detailed Implementation

[0032] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0033] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not 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 application.

[0034] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this application, unless otherwise expressly 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 or an electrical connection; 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 expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0036] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via 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. Similarly, "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.

[0037] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0038] See Figure 1 An embodiment of this application provides a power conversion device 10 including a housing 100, a circuit board 200, a light guide unit 310, and a light-emitting unit 320. The housing 100 has an accommodating cavity 130 and a through hole 140, the through hole 140 communicating with the accommodating cavity 130, and the circuit board 200 disposed within the accommodating cavity 130. The housing 100 includes a limiting unit 130 (e.g., ...). Figure 2The limiting unit 130 protrudes from the inner wall of the accommodating cavity 130. The light-emitting unit 320 is disposed on the circuit board 200, and the light-guiding unit 310 passes through the through hole 140, covering the light-emitting unit 320, thus providing good protection for the light-emitting unit 320. The light generated by the light-emitting unit 320 can be transmitted to the outside of the accommodating cavity 130 through the light-guiding unit 310, thereby facilitating the user to track the light emission status of the light-emitting unit 320. Therefore, the operating status of the power conversion device 10 can be determined based on the light emitted by the light-guiding unit 310.

[0039] The limiting unit 130 is used to limit the light guide unit 310. Potting compound can be injected into the accommodating cavity 130. After the potting compound cures, it can protect the circuit board 200 and the components on the circuit board 200.

[0040] Under the limiting effect of the limiting unit 130, the light guide unit 310 can be prevented from shifting during installation, which would cause the potting compound in the accommodating cavity 130 to leak into the light-emitting unit 320. This avoids the light guide unit 310 being unable to transmit light outward due to the blocking effect of the potting compound on the light-emitting unit 320. Therefore, it can effectively prevent the light-emitting unit 320 from malfunctioning under the influence of the potting compound, thereby improving the assembly yield of the power conversion device 10.

[0041] See Figure 3 In some embodiments, the thickness direction of the housing 100 is designated as the third direction, the extension direction of the light guide unit 310 is designated as the second direction, and the direction perpendicular to both the thickness direction of the housing 100 and the extension direction of the light guide unit 310 is designated as the first direction. The first, second, and third directions can be mutually perpendicular. Therefore, the first, second, and third directions can be understood as the extension directions of three coordinate axes in a spatial Cartesian coordinate system. For example, the first direction can be the X-axis direction, the second direction can be the Y-axis direction, and the third direction can be the Z-axis direction. That is, the first direction is the horizontal direction in the horizontal direction, the second direction is the vertical direction in the horizontal direction, and the third direction is the vertical direction.

[0042] For example, the limiting unit 130 can limit the light guide unit 310 along the thickness direction of the housing 100, that is, the limiting unit 130 can limit the light guide unit 310 along a third direction (e.g. Figure 2 For example, the limiting unit 130 can also limit the light guide unit 310 along a direction that is perpendicular to both the thickness direction of the housing 100 and the extension direction of the light guide unit 310 (e.g. Figure 3That is, the limiting unit 130 can limit the light guide unit 310 along the first direction. For example, the limiting unit 130 can also limit the light guide unit 310 in both the first direction and the third direction at the same time. This can further improve the installation accuracy of the light guide unit 310, thereby preventing the potting compound from leaking into the light-emitting unit 320, and ultimately improving the assembly yield of the power conversion device 10.

[0043] In some embodiments, the limiting unit 130 includes a first limiting member 131, which abuts against the surface of the light guide unit 310 facing away from the circuit board 200. This allows the first limiting member 131 to limit the light guide unit 310 along a third direction, preventing the light guide unit 310 from slipping in the third direction during installation, thereby improving the installation accuracy of the light guide unit 310 in the third direction.

[0044] See Figure 2 In some embodiments, the light guide unit 310 includes a light guide post 311 and a cover member 312. The cover member 312 covers the light-emitting unit 320 and provides a sealing and protection function for the light guide unit 310. The light guide post 311 passes through the through hole 140 and conducts light from the light-emitting unit 320. The light guide post 311 is connected to the cover member 312, and the first limiting member 131 is adapted to limit the cover member 312. That is, the first limiting member 131 applies a resistance force in the third direction to the cover member 312, thereby limiting the entire light guide unit 310 in the third direction and preventing the light guide unit 310 from shifting in the third direction during the housing assembly process.

[0045] See Figure 3 In some embodiments, the limiting unit 130 further includes two second limiting members 132 (e.g., Figure 4 Two second limiting members 132 are spaced apart along a direction perpendicular to both the thickness direction of the housing 100 and the extension direction of the light guide unit 310, i.e., the two second limiting members 132 are spaced apart along a first direction, and the light guide unit 310 is disposed between the two second limiting members 132. The light guide unit 310 can directly contact the two second limiting members 132, so that the two second limiting members 132 apply a certain clamping force to the light guide unit 310 along the first direction, thereby limiting the light guide unit 310 by the second limiting members 132 in the first direction.

[0046] See Figure 3For example, the second limiting member 132 can directly contact the light guide post 311 to form an abutment relationship, that is, the two second limiting members 132 directly apply a certain clamping force to the light guide post 311 along the first direction, thus achieving the limitation of the second limiting member 132 on the entire light guide unit 310 in the first direction. Alternatively, the light guide unit 310 may also include an abutment ring 313, which is arranged around the light guide post 311, such that the abutment ring 313 protrudes a certain height relative to the light guide post 311 along the radial direction of the light guide post 311. The abutment ring 313 directly contacts the second limiting member 132 to form an abutment relationship, while the light guide post 311 and the second limiting member 132 remain non-contact and spaced apart, that is, the two second limiting members 132 apply a certain clamping force to the abutment ring 313 along the first direction, thus achieving the limitation of the second limiting member 132 on the entire light guide unit 310 in the first direction.

[0047] See Figure 3 In some embodiments, the surface of the abutment ring 313 that abuts against the second limiting member 132 is a plane 3131 (e.g., Figure 5 This allows the abutment ring 313 and the second limiting member 132 to form a surface-to-surface contact relationship, thereby reasonably increasing the contact area between the abutment ring 313 and the second limiting member 132, and ultimately improving the stability and reliability of the second limiting member 132 in limiting the abutment ring 313 and the entire light guide unit 310.

[0048] See Figure 2 In some embodiments, the power conversion device 10 further includes a sealing element 400, which is sleeved on the light guide unit 310. The sealing element 400 is at least partially housed in the through hole 140 and abuts against the light guide unit 310 and the housing 100. Therefore, by providing the sealing element 400, the sealing element 400 can effectively seal the through hole 140, preventing external dust or liquid from entering the receiving cavity 130 through the gap between the light guide unit 310 and the housing 100 and causing corrosion, thereby improving the sealing performance of the power conversion device 10.

[0049] See Figure 3 In some embodiments, the seal 400 includes a sealing body 410 and a sealing ring 420 (e.g., Figure 6 The sealing body 410 is sleeved on the light guide post 311. Multiple sealing protrusions 420 are provided, spaced apart along the axial direction of the sealing body 410 (i.e., spaced apart along a second direction). Each sealing protrusion 420 protrudes a certain height relative to the sealing body 410 radially. By providing multiple sealing protrusions 420, the deformation capability of the sealing element 400 can be reasonably improved, thereby enhancing the sealing effect of the sealing element 400 and ultimately improving the sealing performance of the power conversion device 10.

[0050] See Figure 2 In some embodiments, the light guide unit 310 further includes two stop portions 314, which are arranged around the light guide post 311. The stop portions 314 protrude a certain height relative to the light guide post 311 along the radial direction. The two stop portions 314 are spaced apart along a second direction, that is, spaced apart along the axial direction of the light guide post 311. The sealing member 400 is located between the two stop portions 314. By setting the stop portions 314, the sealing member 400 can be effectively limited, thereby improving the installation accuracy of the sealing member 400, and thus improving the sealing effect of the sealing member 400 and the sealing performance of the entire power conversion device 10.

[0051] See Figure 2 In some embodiments, the housing 100 includes a first housing 110 and a second housing 120. The first housing 110 includes a top plate 111 and a first outer ring 112, the first outer ring 112 protruding from the surface of the top plate 111 facing the circuit board 200 in the thickness direction. The second housing 120 includes a bottom plate 121 and a second outer ring 122, the second outer ring 122 protruding from the surface of the bottom plate 121 facing the circuit board 200 in the thickness direction. The first outer ring 112 and the second outer ring 122 abut against each other, and the circuit board 200 is disposed on the bottom plate 121. A through hole 140 is formed in the first outer ring 112 and the second outer ring 122. A first limiting member 131 can protrude from the top plate 111, thus facilitating the first limiting member 131 to apply pressure to the cover member 312 in a third direction, thereby limiting the light guide unit 310 in a third direction. A sealing member 400 can abut between the first outer ring 112 and the second outer ring 122.

[0052] See Figure 2 In some embodiments, the first housing 110 further includes a first inner ring 113, which protrudes from the surface of the top plate 111 facing the circuit board 200 in the thickness direction, and a first outer ring 112 surrounds the first inner ring 113. The second housing 120 further includes a second inner ring 123, which protrudes from the surface of the bottom plate 121 facing the circuit board 200 in the thickness direction, and a second outer ring 122 surrounds the second inner ring 123. The first inner ring 113 is inserted into the gap between the second outer ring 122 and the second inner ring 123, and a through hole 140 is also formed in the first inner ring 113 and the second inner ring 123. A second limiting member 132 protrudes from the second inner ring 123, thereby facilitating the second limiting member 132 to limit the light guide unit 310 along the first direction.

[0053] See Figure 2In some embodiments, the light guide unit 310 further includes a reinforcing protrusion 315, which protrudes radially from the light guide post 311 and is disposed on the light guide post 311. The reinforcing protrusion 315 is at least partially received in the gap between the second outer ring 122 and the second inner ring 123. By providing the reinforcing protrusion 315, the structural strength of the light guide unit 310 can be reasonably improved. On the other hand, the reinforcing protrusion 315 can be connected to the adhesive component located in the gap between the second outer ring 122 and the second inner ring 123, thereby improving the connection strength between the light guide unit 310 and the housing 100.

[0054] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A power conversion device, characterized in that, include: The housing has a receiving cavity and a through hole, the through hole communicating with the receiving cavity, and the housing includes a limiting unit protruding from the inner wall of the receiving cavity; Circuit board, disposed within the accommodating cavity; and A light guide unit and a light emission unit are provided. The light emission unit is disposed on the circuit board. The light guide unit passes through the through hole and covers the light emission unit. The limiting unit limits the light guide unit.

2. The power conversion device according to claim 1, characterized in that, It also includes at least one of the following options: The limiting unit limits the light guide unit along the thickness direction of the housing; The limiting unit limits the light guide unit along a direction that is perpendicular to both the thickness direction of the housing and the extension direction of the light guide unit.

3. The power conversion device according to claim 1, characterized in that, The limiting unit includes a first limiting member, and the first limiting member abuts against the surface of the light guide unit that is disposed away from the circuit board.

4. The power conversion device according to claim 3, characterized in that, The light guiding unit includes a light guiding post and a cover. The cover covers the light-emitting unit. The light guiding post passes through the through hole and is connected to the cover. The first limiting member is adapted to limit the cover.

5. The power conversion device according to claim 1, characterized in that, The limiting unit further includes two second limiting members, which are spaced apart along a direction that is perpendicular to both the thickness direction of the housing and the extension direction of the light guide unit. The light guide unit is disposed between the two second limiting members.

6. The power conversion device according to claim 5, characterized in that, The light guiding unit includes a light guiding post, which passes through the through hole, and the second limiting member abuts against the light guiding post.

7. The power conversion device according to claim 6, characterized in that, The light guide unit also includes an abutment ring, which is arranged around the light guide post and abuts against the second limiting member.

8. The power conversion device according to claim 7, characterized in that, The surface of the abutting ring that abuts against the second limiting member is a plane.

9. The power conversion device according to claim 1, characterized in that, It also includes a sealing element, which is sleeved on the light guide unit and is at least partially housed in the through hole and abuts between the light guide unit and the housing.

10. The power conversion device according to claim 9, characterized in that, The sealing element includes a sealing body and a plurality of sealing protrusions connected to each other. The sealing body is sleeved on the light guide unit, and the sealing protrusions are arranged around the sealing body. The plurality of sealing protrusions are spaced apart along the axial direction of the sealing body.

11. The power conversion device according to claim 9, characterized in that, The light guiding unit includes interconnected light guiding columns and two stop portions. The light guiding columns pass through the through hole, the sealing member is sleeved on the light guiding columns, the stop portions are arranged around the light guiding columns, and the sealing member is located between the two stop portions.

12. The power conversion device according to claim 1, characterized in that, The housing includes a first housing and a second housing. The first housing includes a top plate and a first outer ring protruding from the top plate. The second housing includes a bottom plate and a second outer ring protruding from the bottom plate. The first outer ring and the second outer ring abut against each other. The circuit board is disposed on the bottom plate. The through hole is formed in the first outer ring and the second outer ring, and the limiting unit includes a first limiting member, which protrudes from the top plate.

13. The power conversion device according to claim 12, characterized in that, The first shell further includes a first inner ring protruding from the top plate, and a first outer ring surrounding the first inner ring; the second shell further includes a second inner ring protruding from the bottom plate, and a second outer ring surrounding the second inner ring; the first inner ring is inserted in the gap between the second outer ring and the second inner ring; the limiting unit includes a second limiting member protruding from the second inner ring; and the through hole is also formed in the first inner ring and the second inner ring.

14. The power conversion device according to claim 13, characterized in that, The light guide unit includes a light guide post and a reinforcing protrusion. The light guide post passes through the through hole, and the reinforcing protrusion protrudes radially from the light guide post and is disposed on the light guide post. The reinforcing protrusion is at least partially housed in the gap between the second outer ring and the second inner ring.

Images