Power supply box and LED display box body with same

Abstract

The invention provides a power supply box and an LED display box body with the power supply box, and the power supply box comprises a box body which is provided with a containing cavity for containing electrical components, and a first box wall of the box body is provided with a first ventilation opening; the ventilation cover is arranged on the outer side of the first box wall, the upper end of the ventilation cover shields the outer side of the first ventilation opening, a second ventilation opening is formed in the lower end of the ventilation cover, part of the ventilation cover and the first box wall are arranged in a spaced mode to form a ventilation channel, and the ventilation channel communicates with the first ventilation opening and the second ventilation opening; and the sealing element is arranged between the first box wall and the ventilation cover, so that the accommodating cavity is communicated with the outside only through the second ventilation opening. According to the technical scheme, the problem that the heat dissipation capacity of a power box in the related technology is limited can be effectively solved.

Description

Technical Field

[0001] This invention relates to the field of LED display technology, and more specifically, to a power supply box and an LED display cabinet having the same. Background Technology

[0002] In related technologies, the power supply box is an important structure on the LED display cabinet, which provides power to the display modules on the LED display cabinet and provides display signals.

[0003] A power supply enclosure typically includes a hub board and a power supply. The power supply generates significant heat during operation, affecting the performance of both the power supply itself and the components mounted on the hub board. Therefore, a heat dissipation structure is needed within the power supply enclosure, such as heat dissipation fins on its surface to increase the area for heat exchange with the outside air. However, relying solely on heat dissipation fins to enhance heat dissipation is still limited in its overall cooling capacity. Summary of the Invention

[0004] The main objective of this invention is to provide a power supply box and an LED display cabinet having the same, so as to solve the problem of limited heat dissipation capacity of power supply boxes in related technologies.

[0005] To achieve the above objectives, according to one aspect of the present invention, a power supply box is provided, comprising: a box body having a receiving cavity for accommodating electrical components, a first vent being provided on a first box wall of the box body; a vent cover being disposed on the outside of the first box wall, the upper end of the vent cover being adjacent to the outside of the first vent, the lower end of the vent cover being provided with a second vent, a portion of the vent cover being spaced apart from the first box wall to form a ventilation channel, the ventilation channel connecting the first vent and the second vent; and a sealing member being disposed between the first box wall and the vent cover, such that the receiving cavity is connected to the outside only through the second vent.

[0006] Furthermore, the ventilation duct includes multiple duct segments connected sequentially in the vertical direction, with adjacent duct segments arranged at an angle.

[0007] Furthermore, a ventilation recess is provided on the first box wall, which is located below the first ventilation opening. A first guide protrusion extending in the lateral direction is provided on one of the first box wall and the ventilation cover. The first guide protrusion is located inside the ventilation recess and fits against the other of the first box wall and the ventilation cover to form multiple channel segments.

[0008] Furthermore, one of the first box wall and the ventilation cover is provided with a second guide protrusion extending in the lateral direction. The second guide protrusion is fitted to the other of the first box wall and the ventilation cover. The second guide protrusion and the first guide protrusion extend towards each other and are spaced apart in the vertical direction to form multiple channel segments.

[0009] Furthermore, the first guide protrusion and the second guide protrusion have an overlap dimension O in a preset horizontal direction, the overlap dimension O being greater than or equal to 3 mm and less than or equal to 10 mm, and the preset horizontal direction is parallel to the outer surface of the first box wall; and / or, the first guide protrusion has a protrusion height H, the protrusion height H being greater than or equal to 3 mm and less than or equal to 5 mm.

[0010] Furthermore, the first guide protrusion has a connecting end connected to one side wall of the ventilation recess and a free end spaced apart from the other side wall of the ventilation recess. In the direction from the connecting end to the free end, the top wall of the first guide protrusion is inclined downward.

[0011] Furthermore, the first ventilation opening includes an air inlet located at the lower end of the first box wall and an air outlet located at the upper end of the first box wall, and the ventilation cover includes an air inlet cover plate covering the air inlet and an air outlet cover plate covering the air outlet.

[0012] Furthermore, the power supply box also includes a fan, which is housed within the housing and located at the air outlet.

[0013] Furthermore, the sealing element is a sealing ring, which extends along the circumferential edge of the ventilation cover, and the second ventilation opening is disposed on the ventilation cover and located inside the sealing ring.

[0014] Furthermore, in the direction away from the box body, the lower wall of the second vent is inclined downward.

[0015] Furthermore, the power supply box also includes filter cotton installed in the ventilation channel.

[0016] Furthermore, the box body also has a second box wall disposed opposite to the first box wall, and heat dissipation ribs are provided on the outer surface of the second box wall, and the electrical components are thermally connected with the inner surface of the second box wall.

[0017] Furthermore, a water-retaining edge is provided on the outer surface of the first box wall. The water-retaining edge extends in the lateral direction and is located above the ventilation cover. The water-retaining edge has an inclined water-guiding top wall, wherein the end of the water-retaining edge protrudes from the side of the ventilation cover; and / or, the outer surface of the water-retaining edge protrudes from the outer surface of the ventilation cover.

[0018] According to another aspect of the present invention, an LED display cabinet is provided, including a power supply box, wherein the power supply box is as described above.

[0019] Applying the technical solution of this invention, a first vent is provided on the first wall of the box body, allowing the receiving cavity to exchange gases with the outside through the first vent, thereby enabling air to circulate inside the receiving cavity. This airflow carries away the heat generated during the operation of the power supply box, enhancing its heat dissipation capacity. The power supply box also includes a vent cover over the outside of the first vent, with a second vent at the lower end of the vent cover. A ventilation channel is provided between the vent cover and the first wall, allowing the receiving cavity to communicate with the outside through the ventilation path formed by the second vent, the ventilation channel, and the first vent. When it rains, the seal prevents rainwater from flowing into the gap between the first wall and the vent cover and entering the interior of the power supply box. The second vent is located below the first vent; even if some rainwater enters the second vent, it is difficult for the rainwater to overcome gravity and reach the first vent to enter the receiving cavity, thus preventing rainwater from entering the power supply box and affecting the operation of the electrical components. In other words, the power supply box of this application can be used in outdoor environments and has good heat dissipation capabilities. Therefore, the technical solution of this application can effectively solve the problem of limited heat dissipation capacity of the power supply box in related technologies. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0021] Figure 1 A three-dimensional structural schematic diagram of a portion of the structure of the power supply box according to an embodiment of the present invention is shown;

[0022] Figure 2 It shows Figure 1 A magnified view of point A in the power supply box;

[0023] Figure 3 It shows Figure 1 A magnified view of point B on the power supply box;

[0024] Figure 4 It shows Figure 1 A cross-sectional schematic diagram of part of the power supply box structure;

[0025] Figure 5 It shows Figure 1 A three-dimensional structural diagram of the power supply box from another angle;

[0026] Figure 6 It shows Figure 5 A front view of the power supply box without the fan.

[0027] Figure 7 It shows Figure 5A three-dimensional structural diagram of the power supply box without electrical components;

[0028] Figure 8 It shows Figure 7 A magnified view of point C in the power supply box;

[0029] Figure 9 It shows Figure 1 A three-dimensional structural diagram of the power supply box with the ventilation cover removed;

[0030] Figure 10 It shows Figure 1 A front view of the power supply box without the ventilation cover and seals;

[0031] Figure 11 It shows Figure 10 A magnified view of point D in the power supply box;

[0032] Figure 12 A three-dimensional structural schematic diagram of the second half of the power supply box according to an embodiment of the present invention is shown.

[0033] The above figures include the following reference numerals:

[0034] 01. Receiving cavity; 02. First ventilation opening; 021. Air inlet; 022. Air outlet; 03. Second ventilation opening; 04. Ventilation channel; 041. Channel section;

[0035] 10. Box body; 101. First half-box; 102. Second half-box; 11. First box wall; 111. Ventilation recess; 112. First guide protrusion; 113. Second guide protrusion; 114. Water-retaining edge; 115. Machining rib; 12. Second box wall; 121. Heat dissipation rib;

[0036] 20. Electrical components;

[0037] 30. Ventilation cover; 301. Air inlet cover; 302. Air outlet cover;

[0038] 40. Seal; 50. Fan; 60. HUB board; 61. First clearance opening; 62. Second clearance opening. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] like Figures 1 to 4 As shown, this application provides a power supply box. An embodiment of the power supply box includes: a box body 10, electrical components 20, a ventilation cover 30, and a sealing member 40. The box body 10 has a receiving cavity 01 for accommodating the electrical components 20. A first ventilation opening 02 is provided on the first box wall 11 of the box body 10. The ventilation cover 30 is disposed on the outside of the first box wall 11, with its upper end blocking the outside of the first ventilation opening 02. A second ventilation opening 03 is provided at the lower end of the ventilation cover 30. A portion of the ventilation cover 30 is spaced apart from the first box wall 11 to form a ventilation channel 04, which connects the first ventilation opening 02 and the second ventilation opening 03. The sealing member 40 is disposed between the first box wall 11 and the ventilation cover 30, so that the receiving cavity 01 communicates with the outside only through the second ventilation opening 03.

[0041] Applying the technical solution of this embodiment, a first ventilation opening 02 is provided on the first box wall 11 of the box body 10, so that the receiving cavity 01 can exchange gas with the outside through the first ventilation opening 02, thereby allowing the air inside the receiving cavity 01 to circulate. The air circulation inside the receiving cavity 01 carries away the heat generated during the operation of the power supply box, thereby enhancing the heat dissipation capacity of the power supply box. The power supply box also includes a ventilation cover 30 covering the outside of the first ventilation opening 02. A second ventilation opening 03 is located at the lower end of the ventilation cover 30. A ventilation channel 04 is formed between the ventilation cover 30 and the first box wall 11, allowing the receiving cavity 01 to communicate with the outside through the ventilation path formed by the second ventilation opening 03, the ventilation channel 04, and the first ventilation opening 02. When it rains, the sealing member 40 prevents rainwater from flowing into the gap between the first box wall 11 and the ventilation cover 30 and entering the interior of the power supply box. The second ventilation opening 03 is located below the first ventilation opening 02. Even if some rainwater enters the second ventilation opening 03, it is difficult for the rainwater to overcome gravity and reach the first ventilation opening 02 to enter the receiving cavity 01. This prevents rainwater from entering the interior of the power supply box and affecting the operation of the electrical components 20. Therefore, the power supply box of this embodiment can be used in outdoor environments and has good heat dissipation capabilities. Thus, the technical solution of this embodiment can effectively solve the problem of limited heat dissipation capabilities of power supply boxes in related technologies.

[0042] It should be noted that the above-mentioned "the cavity 01 is connected to the outside only through the second vent 03" means that, apart from the ventilation path formed by the second vent 03, the ventilation channel 04 and the first vent 02, the cavity 01 has no other path to connect with the outside.

[0043] like Figure 1 , Figure 5 and Figure 11As shown, the housing 10 includes a first half-box 101 and a second half-box 102, which are joined together to form a complete housing 10. A receiving cavity 01 is formed between the first half-box 101 and the second half-box 102. The first half-box 101 is positioned closer to the LED display module than the second half-box 102, meaning it is located in front of the second half-box 102. The bottom wall of the first half-box 101 forms a first housing wall 11, which is a non-exposed wall on the LED display housing. Placing the first ventilation opening 02 and the ventilation cover 30 on the first housing wall 11 avoids exposing these structures and affecting the aesthetic appearance of the power supply box.

[0044] like Figure 4 as well as Figures 9 to 11 As shown, the ventilation channel 04 includes multiple channel segments 041 connected sequentially in the vertical direction, with adjacent channel segments 041 arranged at an angle. The ventilation channel 04 is composed of multiple channel segments 041, and the angle between adjacent channel segments 041 creates a bent structure, increasing the complexity of the ventilation channel 04 and further preventing rainwater from flowing from the second ventilation opening 03 to the first ventilation opening 02 and entering the cavity 01.

[0045] like Figure 4 as well as Figures 9 to 11 As shown, a ventilation recess 111 is provided on the first box wall 11, which is located below the first ventilation opening 02. One of the first box wall 11 and the ventilation cover 30 is provided with a first guide protrusion 112 extending in the lateral direction. The first guide protrusion 112 is located within the ventilation recess 111 and fits snugly against the other of the first box wall 11 and the ventilation cover 30 to form multiple channel segments 041. By providing the first guide protrusion 112 within the ventilation recess 111, the ventilation channel 04 forms a complex path channel structure, which has the advantage of structural simplicity.

[0046] like Figure 4 as well as Figures 9 to 11 As shown, one of the first box wall 11 and the ventilation cover 30 is provided with a second guide protrusion 113 extending in the lateral direction. The second guide protrusion 113 is fitted to the other of the first box wall 11 and the ventilation cover 30. The second guide protrusion 113 and the first guide protrusion 112 extend towards each other and are spaced apart in the vertical direction to form multiple channel segments 041. By providing the first guide protrusion 112 and the second guide protrusion 113 in the ventilation recess 111, the ventilation channel 04 forms a channel structure with a complex path, which has the advantage of simple structure.

[0047] It should be noted that the "lateral direction" mentioned above is not limited to the horizontal direction. It can be the horizontal direction or a direction that forms an angle with the horizontal direction (e.g., a direction with an angle of less than or equal to 45° with the horizontal direction).

[0048] Preferably, the ventilation recess 111 is provided with a plurality of first guide protrusions 112 and a plurality of second guide protrusions 113, so that the ventilation channel 04 forms a sawtooth channel structure, thereby increasing the complexity and length of the path of the ventilation channel 04. This makes it difficult for rainwater to flow upward along the ventilation channel 04 to the first vent 02, thereby preventing rainwater from entering the interior of the power supply box.

[0049] In this embodiment, the first guide protrusion 112 and the second guide protrusion 113 are both disposed on the first box wall 11, so that the first guide protrusion 112 and the second guide protrusion 113 can be integrally die-cast with the box body 10, which simplifies the structure of the ventilation cover 30, and allows the ventilation cover 30 to be directly cut from sheet metal, which simplifies the processing technology of the power box and reduces the processing cost of the power box.

[0050] Specifically, the ventilation cover 30 can be a metal plate structure with a certain thickness and hardness, such as an aluminum plate or an iron plate. The ventilation cover 30 is connected to the first box wall 11 by screws. After the screws are installed, the ventilation cover 30 can tightly press the sealing element 40 onto the first box wall 11 to ensure the sealing effect.

[0051] like Figure 11 As shown, the ends of the first guide protrusion 112 and the second guide protrusion 113 overlap in a preset horizontal direction, which is parallel to the outer surface of the first box wall 11. In windy and rainy weather, some rainwater may be blown upward from the second vent 03 into the ventilation channel 04 by the wind. By making the ends of the first guide protrusion 112 and the second guide protrusion 113 overlap in the preset horizontal direction, even if rainwater is blown into the ventilation channel 04 by the wind and passes over the first guide protrusion 112, this part of the rainwater will be blocked by the second guide protrusion 113. This effectively prevents rainwater from flowing from the second vent 03 to the first vent 02 and entering the receiving cavity 01 in windy and rainy weather.

[0052] Furthermore, the first guide protrusion 112 and the second guide protrusion 113 have an overlap dimension O in a preset horizontal direction, which is greater than or equal to 3 mm and less than or equal to 10 mm. The preset horizontal direction is parallel to the outer surface of the first box wall 11. By controlling the overlap dimension O within the above-mentioned range, while ensuring the rainwater blocking effect, the impact of the overlapping arrangement of the ends of the first guide protrusion 112 and the second guide protrusion 113 on the flow width of the ventilation channel 04 can be reduced, so that the ventilation channel 04 has a sufficiently large ventilation area. Preferably, the overlap dimension O can be 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, or 10 mm.

[0053] like Figure 4 As shown, the first guide protrusion 112 has a protrusion height H, which is greater than or equal to 3 mm and less than or equal to 5 mm. By controlling the protrusion height H within the above range, the ventilation channel 04 has a sufficiently large ventilation size in the front-rear direction of the power supply box, thereby ensuring that the ventilation channel 04 has a sufficient ventilation area. Preferably, the protrusion height H can be 3 mm, 4 mm, or 5 mm.

[0054] like Figures 9 to 11 As shown, the first guide protrusion 112 has a connecting end that connects to one side wall of the ventilation recess 111 and a free end spaced apart from the other side wall of the ventilation recess 111. The top wall of the first guide protrusion 112 is inclined downwards in the direction from the connecting end to the free end. This arrangement ensures that even if some rainwater reaches the top of the first guide protrusion 112, it will flow downwards under the action of the inclined top wall after falling onto the top wall of the first guide protrusion 112, and then flow out from the second vent 03, preventing rainwater from remaining inside the ventilation channel 04.

[0055] Similarly, the second guide protrusion 113 also has a connecting end that connects to one side wall of the ventilation recess 111 and a free end spaced apart from the other side wall of the ventilation recess 111. The top wall of the second guide protrusion 113 is inclined downwards in the direction from the connecting end to the free end. This arrangement ensures that even if some rainwater reaches the top of the second guide protrusion 113, it will flow downwards under the action of the inclined top wall after falling onto the top wall of the second guide protrusion 113, and then flow out from the second vent 03, preventing rainwater from remaining inside the ventilation channel 04.

[0056] like Figure 1As shown, the first ventilation opening 02 includes an air inlet 021 located at the lower end of the first box wall 11 and an air outlet 022 located at the upper end of the first box wall 11. The ventilation cover 30 includes an air inlet cover 301 covering the air inlet 021 and an air outlet cover 302 covering the air outlet 022. During operation, the power supply box generates heat, causing the air inside to expand and tend to flow upward. The upward airflow flows through the air outlet 022 to the external environment. During the upward airflow, the air pressure at the lower end of the power supply box decreases, thereby drawing in external air from the air inlet 021. This forms a circulation of airflow, where relatively cool air is drawn in from the external environment through the air inlet 021 and relatively warm air is discharged to the external environment through the air outlet 022. During the airflow, the heat of the power supply box is carried away, resulting in good heat dissipation.

[0057] like Figure 10 and Figure 11 As shown, the first box wall 11 is also provided with a processing rib 115, which is located below the first ventilation opening 02 and has a certain thickness. The box body 10 is a die-cast structure. The molten material solidifies in the mold cavity to form the box body 10. After long-term use, the mold may wear out. By setting the processing rib 115 structure, the space in the mold cavity corresponding to the position of the processing rib 115 is larger than the surrounding structure, allowing more molten material to flow to this position and avoiding the situation where there is a lack of material below the first ventilation opening 02 due to mold wear.

[0058] like Figure 10 As shown, in order to simplify the structure of the power supply box, the structures at the air inlet 021 and the air outlet 022 on the first box wall 11 are the same.

[0059] like Figure 4 , Figure 5 and Figure 7 As shown, the power supply box also includes a fan 50, which is disposed within the housing cavity 01 and located at the air outlet 022. The fan 50 provides power for airflow, accelerates air circulation between the housing cavity 01 and the external environment, and improves the heat dissipation effect of the power supply box.

[0060] When the LED display cabinet is lit, the power supply will quickly heat up and generate hot gas. The fan 50 can quickly exhaust the hot gas from the air outlet 022, while the air inlet 021 at the bottom draws in room temperature gas. With the operation of the fan 50, airflow is formed inside the power supply box to exhaust the hot gas, so that the temperature of the power supply box will not be too high, ensuring normal product use and guaranteeing the display effect.

[0061] like Figure 7As shown, the power supply box also includes a HUB board 60. The electrical components 20 inside the receiving cavity 01 are all mounted on the HUB board 60. The HUB board 60 is located close to the first box wall 11. The electrical components 20 are located on the side of the HUB board 60 away from the first box wall 11. The electrical components 20 include batteries, plug terminals, fuses, etc.

[0062] like Figures 6 to 8 As shown, the fan 50 is located on the side of the HUB plate 60 away from the first box wall 11. In order to ensure smooth airflow, the HUB plate 60 is provided with a first clearance 61 corresponding to the air inlet 021 and a second clearance 62 corresponding to the air outlet 022, so as to avoid the HUB plate 60 obstructing the airflow.

[0063] like Figure 1 , Figure 2 and Figure 9 As shown, the sealing element 40 is a sealing ring that extends along the circumferential edge of the ventilation cover 30. The second vent 03 is disposed on the ventilation cover 30 and located inside the sealing ring. The sealing element 40 seals the outer periphery of the ventilation cover 30 to seal the gap between the ventilation cover 30 and the first box wall 11, thereby preventing rainwater from seeping in through the periphery of the ventilation cover 30. Designing the sealing element 40 as a ring structure has the advantages of simple structure, ease of processing, and ease of installation onto the first box wall 11.

[0064] In embodiments not shown in the figure, the seal may also be a non-annular structure. For example, the seal may include a transverse section and two vertical sections disposed at both ends of the transverse section. The two vertical sections extend downward to seal the top and two sides of the vent cover. The bottom of the vent cover is not sealed, thereby forming a second vent located between the bottom of the vent cover and the first box wall. That is, it is not necessary to process the vent structure on the vent cover at this time.

[0065] like Figure 1 and Figure 2 As shown, the lower wall of the second vent 03 is inclined downwards in the direction away from the housing 10. This arrangement makes the lower wall of the second vent 03 form a guide slope, so that even if some rainwater enters the interior of the ventilation channel 04 through the second vent 03, this part of the rainwater can flow out along the lower wall of the second vent 03, preventing rainwater from remaining inside the ventilation channel 04.

[0066] Furthermore, the power supply box also includes filter cotton disposed within the ventilation channel 04. The filter cotton can filter out particulate matter such as dust in the air to prevent dust from entering the interior of the receiving cavity 01.

[0067] like Figure 12As shown, the housing 10 also has a second housing wall 12 disposed opposite to the first housing wall 11. Heat dissipation ribs 121 are provided on the outer surface of the second housing wall 12, and the electrical component 20 is thermally connected to the inner surface of the second housing wall 12. This thermal connection between the electrical component 20 and the second housing wall 12 allows the heat generated during operation to be transferred to the second housing wall 12, and then exchanged with the external environment through the heat dissipation ribs 121 on the second housing wall 12, thereby improving the heat dissipation effect of the power supply housing.

[0068] Specifically, the battery is thermally bonded to the second housing wall 12 via thermally conductive adhesive. The thermally conductive adhesive (e.g., a thermally conductive silicone sheet) is sandwiched between the battery and the second housing wall 12 to transfer the heat generated during the operation of the power supply to the second housing wall 12.

[0069] The second box wall 12 is the bottom wall of the second half box 102.

[0070] In this embodiment, during the airflow process, some of the heat will also be transferred to the second box wall 12. By setting the ventilation opening, the air inside the receiving cavity 01 can be circulated. At the same time, together with the heat dissipation fins 121, the heat dissipation of the power box is achieved, which has the advantage of good heat dissipation effect.

[0071] like Figure 1 , Figure 3 and Figure 9 As shown, a water-retaining edge 114 is provided on the outer surface of the first box wall 11. The water-retaining edge 114 extends in the lateral direction and is located above the ventilation cover 30. The water-retaining edge 114 has an inclined water-guiding top wall, wherein the end of the water-retaining edge 114 protrudes beyond the side of the ventilation cover 30. The water-retaining edge 114 is located above the ventilation cover 30 and is inclined. When it rains, the rainwater is first blocked by the water-retaining edge 114 and flows along the water-retaining edge 114. Since the end of the water-retaining edge 114 protrudes beyond the side of the ventilation cover 30, the blocked rainwater is guided to the side of the ventilation cover 30, thereby achieving the goal of preventing or minimizing rainwater from reaching the ventilation cover 30 and further improving the protective effect.

[0072] like Figure 1 , Figure 3 and Figure 4 As shown, the outer surface of the water-retaining edge 114 protrudes beyond the outer surface of the ventilation cover 30. Even if some rainwater flows to the area below the water-retaining edge 114, this portion of rainwater is separated from the outer surface of the ventilation cover 30 by a certain distance, thus ensuring that no rainwater or only a very small amount of rainwater reaches the ventilation cover 30, further enhancing the protective effect.

[0073] Specifically, such as Figure 3 and Figure 9As shown, the water-blocking edge 114 includes two inclined edges, with the ends of the two edges close to each other connected, and the ends of the two edges far from each other inclined downwards, so that rainwater is directed to both sides of the ventilation cover 30.

[0074] During the assembly of the LED display cabinet, the water-retaining edge 114 is fitted into the LED display module. The outer surface of the water-retaining edge 114 is machined, which allows it to fit tightly against the rear surface of the LED display module. This reduces the possibility of rainwater leaking downwards between the outer surface of the water-retaining edge 114 and the LED display module. Even if some rainwater does seep in, it will flow downwards along the rear surface of the LED display module and will not flow to the ventilation cover 30.

[0075] It should be noted that when describing the embodiments of this application, "inner" and "outer" refer to the inner and outer sides of the power supply box. Specifically, the side closer to the receiving cavity 01 of the power supply box is the inner side, and the side farther from the receiving cavity 01 of the power supply box is the outer side. For example: Figure 4 The left side of the center air outlet cover 302 is the inner surface, and the right side is the outer surface.

[0076] This application also provides an LED display cabinet. An embodiment of the LED display cabinet of this application includes a power supply box, wherein the power supply box is the aforementioned power supply box. The aforementioned power supply box can effectively solve the problem of limited heat dissipation capacity of power supply boxes in related technologies, and the LED display cabinet having the aforementioned power supply box also has the aforementioned advantages.

[0077] The LED display cabinet also includes a cabinet frame and LED display modules. The LED display modules are installed on the front side of the cabinet frame, and the power supply box is installed on the rear side of the cabinet frame. The power supply box is plugged into the LED display modules to supply power to the LED display modules and transmit control signals, so that the LED display cabinet can be used to display images.

[0078] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0079] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0080] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A power supply box, characterized in that, include: The box (10) has a receiving cavity (01) for accommodating electrical components (20), and a first vent (02) is provided on the first box wall (11) of the box (10). A ventilation cover (30) is provided on the outside of the first box wall (11). The upper end of the ventilation cover (30) is located on the outside of the first ventilation opening (02). The lower end of the ventilation cover (30) is provided with a second ventilation opening (03). Part of the ventilation cover (30) is spaced apart from the first box wall (11) to form a ventilation channel (04). The ventilation channel (04) connects the first ventilation opening (02) and the second ventilation opening (03). A sealing element (40) is disposed between the first box wall (11) and the ventilation cover (30) so that the receiving cavity (01) is connected to the outside only through the second ventilation port (03).

2. The power supply box according to claim 1, characterized in that, The ventilation duct (04) includes multiple duct segments (041) connected sequentially in the vertical direction, and adjacent duct segments (041) are set at an angle.

3. The power supply box according to claim 2, characterized in that, A ventilation recess (111) is provided on the first box wall (11), the ventilation recess (111) is located below the first ventilation opening (02), and a first guide protrusion (112) extending in the lateral direction is provided on one of the first box wall (11) and the ventilation cover (30). The first guide protrusion (112) is located in the ventilation recess (111) and fits against the other of the first box wall (11) and the ventilation cover (30) to form a plurality of the channel segments (041).

4. The power supply box according to claim 3, characterized in that, One of the first box wall (11) and the ventilation cover (30) is provided with a second guide protrusion (113) extending in the lateral direction. The second guide protrusion (113) is fitted to the other of the first box wall (11) and the ventilation cover (30). The second guide protrusion (113) and the first guide protrusion (112) extend towards each other and are spaced apart in the vertical direction to form a plurality of the channel segments (041).

5. The power supply box according to claim 4, characterized in that, The first guide protrusion (112) and the second guide protrusion (113) have an overlap dimension O in a preset horizontal direction, the overlap dimension O being greater than or equal to 3 mm and less than or equal to 10 mm, and the preset horizontal direction is parallel to the outer surface of the first box wall (11); and / or, The first guide protrusion (112) has a protrusion height H, which is greater than or equal to 3 mm and less than or equal to 5 mm.

6. The power supply box according to claim 3, characterized in that, The first guide protrusion (112) has a connecting end connected to one side wall of the ventilation recess (111) and a free end spaced apart from the other side wall of the ventilation recess (111). The top wall of the first guide protrusion (112) is inclined downward in the direction from the connecting end to the free end.

7. The power supply box according to any one of claims 1 to 6, characterized in that, The first ventilation opening (02) includes an air inlet (021) disposed at the lower end of the first box wall (11) and an air outlet (022) disposed at the upper end of the first box wall (11). The ventilation cover (30) includes an air inlet cover plate (301) disposed at the air inlet (021) and an air outlet cover plate (302) disposed at the air outlet (022).

8. The power supply box according to claim 7, characterized in that, The power supply box also includes a fan (50), which is disposed in the receiving cavity (01) and located at the air outlet (022).

9. The power supply box according to any one of claims 1 to 6, characterized in that, The sealing element (40) is a sealing ring, which extends along the circumferential edge of the ventilation cover (30), and the second ventilation opening (03) is disposed on the ventilation cover (30) and located inside the sealing ring.

10. The power supply box according to claim 9, characterized in that, In a direction away from the housing (10), the lower wall of the second vent (03) is inclined downward.

11. The power supply box according to any one of claims 1 to 6, characterized in that, The power supply box also includes filter cotton disposed in the ventilation channel (04).

12. The power supply box according to any one of claims 1 to 6, characterized in that, The box body (10) also has a second box wall (12) disposed opposite to the first box wall (11), and heat dissipation ribs (121) are provided on the outer surface of the second box wall (12), and the electrical component (20) is thermally connected with the inner surface of the second box wall (12).

13. The power supply box according to any one of claims 1 to 6, characterized in that, A water-retaining edge (114) is provided on the outer surface of the first box wall (11). The water-retaining edge (114) extends in the lateral direction and is located above the ventilation cover (30). The water-retaining edge (114) has an inclined water-guiding top wall. The end of the water-retaining edge (114) protrudes from the side of the ventilation cover (30); and / or, The outer surface of the water-blocking edge (114) protrudes from the outer surface of the ventilation cover (30).

14. An LED display cabinet, comprising a power supply box, characterized in that, The power supply box is the power supply box according to any one of claims 1 to 13.

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