Cabinet, combiner box and energy system

Abstract

The application provides a box, a combiner box and an energy system. The box comprises a bottom wall and a plurality of side walls connected to each other, wherein the bottom wall and the plurality of side walls enclose a receiving space with a box opening; the opening side of the box forming the box opening has a plurality of frames for matching with a cover; at least one frame has a first end and a second end, and a middle region between the first end and the second end, the middle region protruding from the first end and the second end in a direction away from the bottom wall. The box, the combiner box and the energy system can improve the sealing performance of the combiner box to a certain extent.

Description

Technical Field

[0001] This application relates to the field of power electronics technology, specifically to a housing, a combiner box, and an energy system. Background Technology

[0002] Electrical equipment typically includes a cover and a enclosure. The enclosure includes a bottom wall and multiple side walls, and electronic components are installed within the space enclosed by the bottom and side walls.

[0003] However, water leakage is prone to occur between the enclosure and the cover in related technologies, which may cause malfunctions of electronic components inside the enclosure. Summary of the Invention

[0004] This application provides a housing, a junction box, and an energy system through various embodiments, which can improve the sealing performance of the junction box to a certain extent.

[0005] In a first aspect, embodiments of this application provide a box body, the box body comprising: a bottom wall and a plurality of side walls connected together; wherein the bottom wall and the plurality of side walls enclose a receiving space having a box body opening; the opening side of the box body forming the box body opening has a plurality of frame edges for engaging with a cover; at least one frame edge has a first end and a second end, and an intermediate region located between the first end and the second end, the intermediate region protruding from the first end and the second end.

[0006] Secondly, embodiments of this application provide a junction box, the junction box comprising: a cover and a box body as described above.

[0007] Thirdly, embodiments of this application provide an energy system, including: a power conversion device, and a combiner box as described above, the combiner box being disposed between a power source and the power conversion device.

[0008] In several embodiments provided in this application, by providing a structure on at least one side of the housing that protrudes from the first end and the second end relative to the first end along a direction away from the housing, the compressive force of the sealing strip in the cover borne by the middle area is enhanced, thereby improving the overall sealing performance. Attached Figure Description

[0009] Figure 1 This is a three-dimensional schematic diagram of the usage state of a combiner box provided for one embodiment of this application.

[0010] Figure 2 An exploded view of a junction box provided for one embodiment of this application.

[0011] Figure 3 A cross-sectional view of a box body provided for one embodiment of this application.

[0012] Figure 4 A partial cross-sectional view of a flow channel in a housing provided for one embodiment of this application, showing a through hole.

[0013] Figure 5 A functional block diagram of an energy system provided for one embodiment of this application.

[0014] Explanation of reference numerals in the attached figures

[0015] 100. Housing; 103. Bottom wall; 107. Reception space; 109. Cover; 111. First end; 113. Second end; 115. Middle area; 117. First side wall; 119. Second side wall; 121. Third side wall; 123. Fourth side wall; 125. First frame; 127. Second frame; 129. Third frame; 131. Fourth frame; 133. Sealing strip; 135. Lug; 137. Flow channel; 139. Channel bottom; 141. Through hole; 143. Top surface; 145. Bottom surface; 150. Combiner box; 160. Energy system; 170. Power supply; 180. Power conversion device. Detailed Implementation

[0016] The technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0017] In this specification, the accompanying drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to show the details of the local features more clearly.

[0018] Unless otherwise stated, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of this specification. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items. The singular forms "a," "the," and "the" as used in this specification and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0019] In the description of this specification, it should be understood that 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this specification, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] In the description of this specification, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "height," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description in this specification and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. In other words, they should not be construed as limitations on this application.

[0021] In the description of this specification, unless otherwise expressly defined, the terms "installation," "connection," "joining," "fixing," "setting," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; 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 also refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this specification according to the specific circumstances.

[0022] To withstand long-term outdoor operation, the casing of electrical equipment is typically made of corrosion-resistant insulating materials, such as SMC (sheet molding compound). The casing of electrical equipment is usually sealed at the connection between the cover and the enclosure using a combination of latches and sealing strips. However, due to the low structural rigidity of SMC material, it is prone to deformation during the cover pressing process. Furthermore, uneven stress during latch installation leads to significant differences in the sealing strip bonding condition at different parts of the frame.

[0023] Researchers have found that the frame structure of the casing of electrical equipment in related technologies is usually a planar structure. When dealing with the above-mentioned uneven pressing problem, this planar structure is difficult to alleviate the risk of sealing failure caused by excessive or insufficient local pressure.

[0024] Please refer to the following: Figure 1 and Figure 2 This application provides a housing 100. The housing 100 includes: a bottom wall 103 and a plurality of side walls connected to each other; wherein the bottom wall 103 and the plurality of side walls enclose a receiving space 107 having a housing opening; the opening side of the housing 100 forming the housing opening has a plurality of frame edges for mating with a cover 109; at least one frame edge has a first end 111 and a second end 113, and an intermediate region 115 located between the first end 111 and the second end 113, the intermediate region 115 protruding from the first end 111 and the second end 113 in a direction away from the bottom wall 103, such as... Figure 3 As shown.

[0025] In this embodiment, the enclosure 100 forms a receiving space 107, which allows electronic devices to be installed within it. The bottom wall 103 and side walls provide support and protection for the electronic devices. The enclosure 100 may include multiple side walls connected to the bottom wall 103, including a first side wall 117, a second side wall 119, a third side wall 121, and a fourth side wall 123. These side walls are sequentially connected to form circumferential side walls surrounding the bottom wall 103, creating a receiving space 107 with an opening within the enclosure 100. This opening can be used to mate with the cover 109 of the junction box 150, creating a relatively enclosed internal space within the junction box 150.

[0026] In some embodiments, the housing 100 may be integrally formed. Of course, in some embodiments, the housing 100 may also be formed by assembling the first side wall 117, the second side wall 119, the third side wall 121, the fourth side wall 123 and the bottom wall 103.

[0027] In this embodiment, the side facing the opening of the box is the opening side of the box 100. A cover 109 can be installed on the opening side of the box 100. The box 100 can be connected to the cover 109 via a frame located on the opening side. Specifically, each sidewall forms a frame at its end away from the bottom wall 103. In this embodiment, the multiple frames include a first frame 125 formed by the first sidewall 117, a second frame 127 formed by the second sidewall 119, a third frame 129 formed by the third sidewall 121, and a fourth frame 131 formed by the fourth sidewall 123. Each frame may include a first end 111 and a second end 113 that are far apart, and the first ends 111 and second ends 113 of the multiple frames can be sequentially connected to form the box opening.

[0028] In this embodiment, to improve the sealing performance between the housing 100 and the cover 109, the middle region 115 of a portion of the frame can protrude from the corresponding first end 111 and second end 113 in a direction away from the bottom wall 103. This results in the compression amount of the sealing strip 133 between the housing 100 and the cover 109 corresponding to the middle region 115 being different from the compression amount of the first end 111 and the second end 113. That is, the compression amount of the sealing strip 133 brought by the middle region 115 is greater than that of the first end 111 and the second end 113, thereby improving the sealing capability of the middle region 115. It can be understood that the height of the middle region 115 protruding from the first end 111 and the second end 113 is less than the elastic deformation range of the sealing strip 133. Thus, after the middle region 115 compresses the sealing strip 133, the first end 111 and the second end 113 will also compress the sealing strip 133, achieving better overall sealing performance.

[0029] In several embodiments provided in this application, by providing a structure on at least one side of the housing 100 with a middle region 115 protruding relative to the first end 111 and the second end 113 in a direction away from the housing 100, the compressive force of the sealing strip 133 in the cover 109 borne by the middle region 115 is enhanced, thereby improving the sealing ability of the middle region 115 and improving the overall sealing performance.

[0030] In some embodiments, the transition from the intermediate region 115 to the first end 111 is an arc transition, and / or the transition from the intermediate region 115 to the second end 113 is an arc transition.

[0031] In this embodiment, to further optimize the structural form of the frame of the housing 100 and enable the housing 100 to have better sealing continuity and smooth pressing during mating with the cover 109, the middle region 115 of the frame and the first end 111, or the middle region 115 and the second end 113, can be configured as an arc transition structure. Specifically, the arc transition from the middle region 115 to the first end 111 provides better sealing performance between the middle region 115 and the first end 111. Of course, the arc transition from the middle region 115 to the second end 113 can also be an arc transition, providing good sealing performance between the middle region 115 and the second end 113. The arc formed by the arc transition from the middle region 115 to the first end 111 and the arc formed by the arc transition from the middle region 115 to the second end 113 can be the same or different. Preferably, both the arc transition from the middle region 115 to the first end 111 and the arc transition from the middle region 115 to the second end 113 are arc transitions.

[0032] In this embodiment, the arc transition refers to a gradual decrease in the height of the frame along a smooth arc from the middle region 115 towards the first end 111 and / or the second end 113. This arc transition ensures that the compressive force on the sealing strip 133 during the pressing process is greatest in the middle region 115 and gradually decreases towards the first end 111 and the second end 113, thus improving the fit of the sealing strip 133. The arc formed by the arc transition can be designed based on factors such as the thickness of the cover 109, the distribution of the latches, and the material of the sealing strip 133 in actual applications. The arc transition structure provides better sealing performance for the housing 100 during the pressing process of the cover 109.

[0033] In some embodiments, the first end 111, the intermediate region 115, and the second end 113 are located on the same arc.

[0034] In this embodiment, to improve the sealing performance of the frame structure and to simplify manufacturing, the first end 111, the middle region 115, and the second end 113 can be located on the same arc line. Specifically, the arc line refers to an arc-shaped contour curve formed with a fixed center and radius. This arc line extends along the length of the frame, so that the geometric contour of the frame in the height direction continuously transitions from the first end 111 to the middle region 115 and then to the second end 113, and remains on the same arc surface. In this embodiment, the deformation of the frame and the sealing strip 133 can be continuously changed during the pressing process, and it is also convenient to form using a unified mold during the manufacturing process, reducing the complexity of the process. Preferably, the curvature of the arc line is selected from the curvature range of 0° to 1.227°. Setting the curvature of the arc line within this curvature range can increase the compression of the sealing strip 133 by the middle region 115, while also ensuring good sealing between the first end 111 and the second end 113 and the sealing strip 133.

[0035] In some embodiments, the middle region 115 of the first border 125 and the third border 129 protrudes from the first end 111 and the second end 113 in a direction away from the bottom wall 103; and / or, the middle region 115 of the second border 127 and the fourth border 131 protrudes from the first end 111 and the second end 113 in a direction away from the bottom wall 103.

[0036] In this embodiment, multiple borders can be configured such that the middle region 115 protrudes from the first end 111 and the second end 113. Alternatively, the first border 125 and the third border 129 can be chosen to form the structure where the middle region 115 protrudes from the first end 111 and the second end 113. Alternatively, the second border 127 and the fourth border 131 can be chosen to form the structure where the middle region 115 protrudes from the first end 111 and the second end 113. In this embodiment, the first border 125 and the third border 129 extend along the first direction F, and the second border 127 and the fourth border 131 extend along the second direction H.

[0037] In this embodiment, the frame structure can be specifically designed according to the number and position of the latches between the cover 109 and the housing 100. The latches are typically located in the contact area between the cover 109 and the housing 100 frame to apply mechanical clamping force, causing the cover 109 to press against the sealing strip 133 to achieve a seal between the cover 109 and the housing 100. In some cases, if the latches are mainly distributed on the first frame 125 and the third frame 129, the second frame 127 and the fourth frame 131 are prone to becoming areas with weaker clamping force. Therefore, a structure can be formed in the second frame 127 and the fourth frame 131, with an intermediate region 115 protruding from the first end 111 and the second end 113, to compensate for the compression of the sealing strip 133 by the second frame 127 and the fourth frame 131. Similarly, in some cases, if the latches are mainly distributed on the second frame 127 and the fourth frame 131, a structure can be formed on the first frame 125 and the third frame 129 where the middle region 115 protrudes from the first end 111 and the second end 113. If the latches are provided on all four frames, the protruding structure of the middle region 115 can be flexibly selected on all or part of the frames according to the sealing requirements, thereby enhancing the overall sealing reliability.

[0038] Please refer to the following: Figure 1 , Figure 2 and Figure 4 In some embodiments, at least a portion of the sidewalls have lugs 135 on their outer sides near the frame. The lugs 135 and the sidewalls form a guide groove 137 facing the cover 109. The bottom 139 of the guide groove 137 has a through hole 141.

[0039] In this embodiment, in order to improve the drainage capacity of the manifold 150, at least a portion of the sidewalls may have lugs 135 on their outer sides near the frame. The lugs 135 may be protrusions formed on the outer surface of the sidewalls, with the ends of the lugs 135 away from the sidewalls extending toward the cover 109 and forming a guide groove 137 on the outer surface of the adjacent sidewalls.

[0040] In this embodiment, the drainage channel 137 can be used to drain water between the cover 109 and the housing 100 of the manifold 150. For example, the working environment of the manifold 150 may contain rainwater. The drainage channel 137 can collect rainwater from the edge of the cover 109 and guide the rainwater out through the through hole 141. In this embodiment, the drainage speed in the drainage channel 137 can be accelerated by providing the through hole 141 in the drainage channel 137, reducing water stagnating near the frame.

[0041] In some embodiments, in use, the plurality of sidewalls have a top surface 143 facing away from the direction of gravity; the guide groove 137 is located on the top surface 143, and along the direction of gravity, the top surface 143 is inclined from the frame toward the bottom of the groove 139, and the through hole 141 is located close to the top surface 143.

[0042] In this embodiment, the usage state can refer to the junction box 150 being used in the energy system 160 and installed in the working environment. At this time, the junction box 150 has a definite position relative to nature. The top surface 143 of the junction box 150 is the outer surface of the junction box 150 facing away from the direction of gravity. Water is likely to fall onto the top surface 143 and is also likely to stagnate on the top surface 143. If water stagnates near the edge, when the cover 109 is opened, water may flow into the receiving space 107 of the junction box 150, which may damage the electronic devices inside the receiving space 107. In order to further optimize the drainage path of the junction box 150 housing 100 and allow the water in the guide channel 137 to drain smoothly, the top surface 143 is inclined from the edge towards the bottom 139 of the guide channel 137, so that the water flows to the bottom 139 under the action of gravity. Because the through hole 141 is located near the top surface 143, water flowing towards the bottom of the trough 139 can easily drain out through the through hole 141, thereby effectively reducing water accumulation in the guide trough 137. Specifically, by setting a top surface 143 with an inclined angle, and combining the guide drainage structure of the guide trough 137 and the through hole 141, the drainage capacity of the manifold 150 in rainy environments is improved.

[0043] In some embodiments, in use, the plurality of sidewalls have a bottom surface 145 facing the direction of gravity; the flow channel 137 is located on the bottom surface 145, and along the direction of gravity, the through hole 141 is located close to the channel wall of the flow channel 137 away from the bottom surface 145.

[0044] In this embodiment, the bottom surface 145 of the housing 100 refers to the outer surface of the housing 100 facing the direction of gravity when the manifold 150 is in normal installation and use. Water on the outer surface of the housing 100 may flow to the bottom surface 145 of the housing 100 under the action of gravity. If it is not drained in time, it is easy to accumulate on the bottom surface 145, and may even seep into the interior of the housing 100 through gaps. In this embodiment, by setting a guide channel 137 on the bottom surface 145, water flowing to the bottom area can be collected and guided. Furthermore, in order to ensure that the water in the guide channel 137 can be drained smoothly, the through hole 141 can be set on the channel wall near the guide channel 137 away from the bottom surface 145. Specifically, in the event of local water stagnation at the bottom of the guide channel 137, the water will naturally drain out from the through hole 141 as the water level rises, reducing water stagnation and lowering the risk of water entering the manifold 150.

[0045] This application embodiment also provides a junction box 150, which includes: a cover 109 and a box body 100 provided in the aforementioned embodiment.

[0046] In this embodiment, the junction box 150 may include a cover 109, a sealing strip 133, and a housing 100. The cover 109 may be provided with a mounting groove, and the sealing strip 133 is limited by engaging with the mounting groove. The junction box 150 may have a closed state in which the cover 109 and the housing 100 are tightly connected, and an open state in which the cover 109 and the housing 100 are separated. The cover 109 and the housing 100 are connected by a latch and a hinge. When the junction box 150 is in the closed state, the latch locks the cover 109 and the housing 100. When the latch releases the cover 109 and the housing 100, allowing the cover 109 and the housing 100 to rotate relative to the hinge, the junction box 150 is in the open state.

[0047] In some embodiments, the sealing strip 133 may be a hollow structure, which increases its deformation capacity. Of course, the sealing strip 133 may be a solid structure and made of a material with good deformation capacity.

[0048] In this embodiment, the functions and effects of the combiner box 150 can be explained by referring to the foregoing embodiments, and will not be repeated here.

[0049] Please see Figure 5 This application also provides an energy system 160, including: a power conversion device 180, and a combiner box 150 as provided in the foregoing embodiments, wherein the combiner box 150 is disposed between the power supply 170 and the power conversion device 180.

[0050] In this embodiment, the power conversion device 180 may include, but is not limited to, an inverter or a converter. The power source 170 may include, but is not limited to, wind power, photovoltaic power, hydrogen power, hydropower, or thermal power, etc., which will not be described in detail here.

[0051] In this embodiment, the functions and effects of the energy system 160 can be explained by referring to the foregoing embodiments, and will not be repeated here.

[0052] It is understood that in the various embodiments of this specification, the sequence number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this specification.

[0053] It is understood that the various implementation methods described in this specification can be implemented individually or in combination, and the embodiments in this specification are not limited in this respect.

[0054] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the aforementioned method implementations, and will not be repeated here.

[0055] The above description is merely a specific embodiment of this specification, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this specification should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A box, characterized in that, The enclosure includes: The bottom wall and multiple side walls are connected; The bottom wall and the plurality of side walls form a receiving space with a box opening; the box has a plurality of frame edges for engaging with a cover on the opening side of the box; at least one frame edge has a first end and a second end, and an intermediate region located between the first end and the second end, the intermediate region protruding from the first end and the second end in a direction away from the bottom wall.

2. The housing according to claim 1, characterized in that, The transition from the middle region to the first end is an arc, and / or the transition from the middle region to the second end is an arc.

3. The housing according to claim 2, characterized in that, The first end, the intermediate region, and the second end are on the same arc.

4. The housing according to claim 3, characterized in that, When the housing and the cover are fitted together, the sealing strip between the frame and the cover will be compressed. The compression of the sealing strip by the middle area is greater than the compression of the sealing strip by the first end and greater than the compression of the sealing strip by the second end.

5. The housing according to claim 1, characterized in that, The plurality of borders includes a first border, a second border, a third border, and a fourth border that are connected to each other; Wherein, the middle region of the first border and the third border protrudes from the first end and the second end in a direction away from the bottom wall; and / or, The middle region of the second and fourth borders protrudes from the first and second ends in a direction away from the bottom wall.

6. The housing according to claim 1, characterized in that, At least some of the sidewalls have lugs on their outer sides near the frame. The lugs and the sidewalls form a flow guide groove facing the cover. The bottom of the flow guide groove has a through hole.

7. The housing according to claim 6, characterized in that, In use, the plurality of sidewalls have a top surface facing away from the direction of gravity; The flow channel is located on the top surface, and along the direction of gravity, the top surface slopes from the frame towards the bottom of the channel, and the through hole is located close to the top surface.

8. The housing according to claim 6, characterized in that, In use, the plurality of sidewalls have a bottom surface facing the direction of gravity; The flow channel is located on the bottom surface, and along the direction of gravity, the position of the through hole is close to the channel wall away from the bottom surface.

9. A junction box, characterized in that, The junction box includes: a cover and a box body as described in any one of claims 1 to 8.

10. An energy system, characterized in that, include: A power conversion device, and a combiner box as described in claim 9, wherein the combiner box is disposed between the power source and the power conversion device.

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