Relay heat dissipation structure

Abstract

The application discloses a relay heat dissipation structure, which comprises the following steps: recessing a containing groove with a containing opening on one side of an outer cover, and arranging a flow guide part on any part of the surface of the outer cover; the flow guide part is provided with at least one air convection hole penetrating in the direction of the containing groove, so that the at least one air convection hole is communicated with the containing groove; a base is arranged on the side of the outer cover provided with the containing opening, and the base is further provided with a magnetic suction electric control assembly corresponding to one side of the containing groove; the arrangement of the flow guide part enables the temperature generated by the magnetic suction electric control assembly in the containing groove to be circulated and convection through the at least one air convection hole, so that the yield of the operation of the magnetic suction electric control assembly is kept, the generation of high temperature inside is improved, the parts are kept in the high temperature space, the service life is shortened, and the problems of non-conduction and poor contact caused by water and ice are solved.

Description

Technical Field

[0001] This invention relates to a relay heat dissipation structure, specifically a technology applied in the electromechanical field. It is mainly suitable for high-current loads and can regulate the temperature generated inside the relay, thereby maintaining the stable operation of the internal mechanism of the relay. Background Technology

[0002] A relay is an electronic control device used in automated control electronic circuits, such as communication switches, industrial control, vehicles, and air conditioners. Essentially, it's an electronic automatic switch that uses a smaller current to control a larger current. Relays play roles in electronic circuits such as automatic adjustment, safety protection, and circuit switching.

[0003] Relays are applicable in a wide range of places, not only the small current relays found in distribution boxes and control boxes, but also the high current (automatic) relays used in large industrial sites and automobiles. They are mainly used to match and regulate the high current conduction of large machinery used in automobiles and large industrial sites. However, the high current relays used in many places and automobiles are often exposed to the outdoor environment for a long time, traveling on the road, or parked in parking lots or roadside parking spaces. As a result, the relays are often exposed to harsh external environments such as high temperature exposure, dust contamination, or rain. Therefore, due to the exposure of the external environment, moisture may accumulate inside the relay and freeze, or dust and dirt may enter the relay, causing problems such as non-conductivity and poor contact of the internal components.

[0004] In addition, high-current relays generate high temperatures inside due to prolonged operation, which undoubtedly shortens the lifespan of the electronic components inside. Furthermore, most relays are encapsulated, so they do not have temperature regulation or release capabilities. Therefore, relays are one of the electronic components with the highest replacement rate. Summary of the Invention

[0005] The main objective of this invention is to provide a high-current relay that can effectively conduct and circulate the internal temperature to the external environment, thereby effectively reducing the internal temperature of the relay and maintaining the functionality of its internal components. It also prevents foreign objects (water, dust) from entering the relay, ensuring normal operation. This invention addresses the shortcomings of existing relays, which suffer from shortened lifespan due to high internal temperatures that keep components in a high-temperature environment. Furthermore, it addresses the issue of moisture buildup due to environmental factors, which can freeze inside the relay in low-temperature environments, causing problems such as poor conductivity and contact issues among internal components.

[0006] However, in order to achieve the aforementioned effects and improve the existing deficiencies, the present invention provides a relay heat dissipation structure, comprising: an outer cover, a receiving groove having a receiving opening formed inward on one side, and a guide portion further provided at any part of the surface of the outer cover, wherein the guide portion has at least one air convection hole penetrating towards the receiving groove, so that the at least one air convection hole communicates with the receiving groove; a base, which is installed on the side of the outer cover having the receiving opening, and a magnetic attraction electronic control component is further installed on the side of the base corresponding to the receiving groove; wherein, by utilizing the arrangement of the guide portion, the temperature generated by the magnetic attraction electronic control component located in the receiving groove can be circulated through the at least one air convection hole to maintain the operational efficiency of the magnetic attraction electronic control component.

[0007] In some embodiments, the guide portion further includes an air guide channel recessed toward the receiving groove, and the at least one air convection hole is penetrated through the bottom surface of the air guide channel and communicates with the receiving groove. The air guide channel is provided with a pair of openings at both ends. The high temperature in the receiving groove is discharged by the at least one air convection hole and circulated through the air guide channel space from each pair of openings.

[0008] In some embodiments, the bottom surface of the air guide groove and the configuration corresponding to the at least one air convection hole are further provided with an annular rib, which surrounds the opening of the at least one air convection hole.

[0009] In some embodiments, the height of the air guide channel is further defined as a height (T), and the thickness of the annular rib is further defined as a height (D), wherein the height (T) is equal to the height (D) or the height (T) is greater than the height (D).

[0010] In some embodiments, when the height (T) = the height (D), the portion of the annular rib is further recessed to form a side guide groove. One end of the side guide groove is connected to the at least one air convection hole, and the other end of the side guide groove is connected to the groove space of the air guide groove. This allows the high temperature in the receiving groove to be guided out from the at least one air convection hole, and then guided to the air guide groove via the side guide groove before being guided out from each pair of openings.

[0011] In some embodiments, the opening of the at least one air convection hole connected to the receiving groove is further defined as a first end, and the opening of the at least one air convection hole opposite to the first end is defined as a second end. The diameter of the second end is smaller than that of the first end, and the inner hole shape of the at least one air convection hole gradually narrows into a cone shape from the first end to the second end.

[0012] In some embodiments, the outer cover further includes a main cover portion and two side cover portions connected to both sides of the main cover portion, and two ear pieces extend from the angle where the main cover portion and each side cover portion are connected, and the bottom of each ear piece is recessed to form a side groove and a notch located on the periphery of each side groove. The side groove, the notch, and the openings of each ear piece are interconnected, and a locking block is protruded from the bottom surface of each side groove. In addition, two lock holes pass through each ear piece and the locking block located in each ear piece. In addition, each notch further includes an inner end, an outer end, and an inclined guide surface connecting the inner end and the outer end. Each inner end is connected to the corresponding side groove space, while each outer end is located on the outer periphery of each ear piece and connected to each inner end. Each inclined guide surface is inclined downwards towards each outer end with one end connected to the inner end.

[0013] In some embodiments, the base further protrudes to form a box portion with an opening on the side opposite to the receiving opening, and a bottom cover is movably assembled to the box portion and closes the opening; the bottom cover has at least one internal vent on the side facing the inside of the box portion, and at least one external vent on the side facing outward and corresponding to the at least one internal vent, the at least one internal vent and the at least one external vent are connected; in addition, the diameter of the at least one external vent is larger than the diameter of the at least one internal vent, or the diameter of the at least one external vent is smaller than the diameter of the at least one internal vent.

[0014] In some embodiments, when the diameter of the at least one external vent is larger than that of the at least one internal vent, the at least one external vent is further provided with a diversion rib, the diversion rib separates the at least one external vent to form two diversion ports, and the diversion rib and the at least one internal vent are spaced apart to form two fine flow ports, each fine flow port being connected to each diversion port.

[0015] In some embodiments, when the diameter of the at least one external vent is smaller than that of the at least one internal vent, the at least one internal vent is further provided with a diversion rib, the diversion rib separates the at least one internal vent to form two diversion ports, and the diversion rib and the at least one external vent are spaced apart to form two fine flow ports, each fine flow port being connected to each diversion port.

[0016] According to the main technical features described above, the advantage of this invention is that, through at least one air convection hole provided on the outer cover, the high temperature generated by the magnetic attraction electrical control component located in the receiving groove can be convection and guided to the outside, so that the temperature inside the receiving groove can be kept the same as the outside temperature, avoiding the problem of the magnetic attraction electrical control component being affected by excessively high temperature inside the receiving groove, or even reducing the service life of the magnetic attraction electrical control component. In this way, the air inside the receiving groove is circulated, so the space inside the receiving groove will not freeze due to water vapor, thereby ensuring that the contact and conduction of the magnetic attraction electrical control component are maintained in normal operation. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the present invention.

[0018] Figure 2 This is a three-dimensional schematic diagram of the invention from another perspective.

[0019] Figure 3 This is a three-dimensional schematic diagram of the present invention from another perspective.

[0020] Figure 4 This is an exploded perspective view of the present invention.

[0021] Figure 5 This is an exploded three-dimensional schematic diagram from another perspective of the present invention.

[0022] Figure 6 for Figure 1 A schematic diagram of the cross section of line segment VI-VI.

[0023] Figure 7 for Figure 1 A schematic diagram of the cross section of line segment VII-VII.

[0024] Figure 8 This is a three-dimensional schematic diagram of another embodiment of the annular rib of the present invention.

[0025] Figure 9 for Figure 8 A magnified view of a portion of the image.

[0026] Figure 10 for Figure 8 A schematic diagram of the cross section of line segment IX-IX.

[0027] Figure 11 for Figure 2 A schematic diagram of the cross section of line segment XI-XI.

[0028] Figure 12 for Figure 11 A magnified view of a portion of the image.

[0029] Figure 13 This is a perspective view of another embodiment of the bottom cover.

[0030] Figure 14 for Figure 13 A magnified view of a portion of the image.

[0031] Explanation of markings in the diagram: Outer cover: 1; Receiving groove: 11; Receiving opening: 12; Guide section: 13; Air guide groove: 131; Opening: 132; Air convection hole: 14; First opening end: 141; Second opening end: 142; Annular rib: 15; Side guide groove: 151; Main cover part: 16; Side cover part: 17; Ear piece: 18; Side groove: 181; Notch: 182; Inner opening end: 1821; Outer opening end: 1822; Sloping guide surface: 1823; Lock block: 183; Lock hole: 184; Base: 2; Box part: 21; Opening: 211; Magnetic attraction electronic control assembly: 3; Bottom cover: 4; Inner air hole: 41; Outer air hole: 42; Diverting rib: 43; Diverting opening: 44; Fine flow opening: 45; Height: T; Height: D. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention. Please see... Figures 1 to 14 As shown, the present invention discloses a relay heat dissipation structure, comprising: an outer cover 1, with a recessed groove 11 having a receiving opening 12 on one side, the receiving groove 11 being T-shaped, and a guide portion 13 further provided at any part of the surface of the outer cover 1 (in order to accommodate the different shapes of the outer cover 1 for various relays, the location of the guide portion 13 is not limited to a specific location of the outer cover 1, and the bottom surface of the outer cover 1 is mainly drawn in the figures of the present invention), and the guide portion 13 is provided with at least one air convection hole 14 penetrating towards the receiving groove 11, so that the at least one air convection hole 14 connects to the receiving groove 11, allowing the air in the receiving groove 11 to form convection and conduction functions with the outside air; a base The base 2 is installed on the side of the outer cover 1 where the receiving opening 12 is provided and closes the receiving groove 11. A magnetic attraction electrical control component 3 is further installed on the side of the base 2 corresponding to the receiving groove 11. The magnetic attraction electrical control component 3 is mainly used to regulate large current. Its internal mechanism is a component of an existing relay, so it will not be described again here. With the provision of the flow guide 13, when the present invention is installed in the relevant place and the side with the flow guide 13 is in contact with the installation position, the temperature generated by the magnetic attraction electrical control component 3 in the receiving groove 11 can be circulated through at least one air convection hole 14 to maintain the stability of the operation of the magnetic attraction electrical control component 3.

[0033] Based on the technical features defined above for this invention, please refer to... Figure 3 , Figure 6 , Figure 7As shown, when a relay is installed on an electrical device and operates, its magnetic control component 3 will generate high temperatures over time. Traditional relays, because their electronic components are encapsulated in a housing and lack proper heat dissipation holes, experience a gradual increase in internal temperature. This prolonged exposure to high temperatures affects the conductivity and lifespan of the electronic components. Conversely, if a relay is placed in a low-temperature environment, moisture can easily accumulate inside and freeze, leading to poor contact and reduced conductivity. This invention addresses this by incorporating at least one air convection hole 14, allowing air convection within the receiving groove 11 and preventing moisture buildup, thus mitigating freezing. Furthermore, the air convection hole 14 allows for temperature exchange between the receiving groove 11 and the external environment, enabling the magnetic control component 3 to operate at a suitable temperature for extended periods, ensuring good conductivity of its electronic components.

[0034] Following the above description of the main technical features of the present invention, further details of other technical features of the present invention will be provided. Firstly, regarding the design of the airflow guide 13 on the outer cover 1, in order to reliably provide smooth guidance and convection of the high temperature within the receiving groove 11, the present invention adopts a concave design for the airflow guide 13. Therefore, on either side of the outer cover 1, an airflow guide groove 131 is further included, recessed towards the receiving groove 11 (the figure mainly shows the elongated airflow guide groove 131 formed at the bottom end of the outer cover 1). At least one air convection hole 14 penetrates through the bottom surface of the airflow guide groove 131 and connects to the receiving groove 11. Furthermore, a pair of openings 132 are provided at both ends of the airflow guide groove 131, allowing the airflow to... The air guide 131 has an open slot space. Therefore, when the present invention is installed in a relevant location and one side of the air guide 131 is attached to the panel, a high-temperature environment will be formed in the receiving slot 11 during operation. At this time, the high temperature in the receiving slot 11 can be discharged through the at least one air convection hole 14 and through the slot space of the air guide 131, and then discharged from the pairs of openings 132 on both sides of the air guide 131 to exchange with the outside air for circulation and convection. Through the arrangement of the air guide 131 and the opening of the pairs of openings 132, the air guide 131 forms an air channel to regulate and circulate the internal and external temperatures, thereby achieving a balance between the temperature inside the receiving slot 11 and the external temperature. Please see Figures 1 to 7 As shown, where Figure 6 , Figure 7 The dotted lines indicate the installation location, such as a terminal block or panel.

[0035] Please see below for the next part. Figure 3 , Figures 5 to 7As shown, the common way to install the relay of the present invention is to place the side with the air guide 13 against the control panel or the terminal block of the dedicated relay. In order to avoid the high temperature in the receiving groove 11 from being obstructed from circulating with the outside, in addition to the aforementioned design of each pair of openings 132, a ring rib 15 is further protruding on the bottom surface of the air guide groove 131 and corresponding to the setting of at least one air convection hole 14. The ring rib 15 surrounds the opening of the at least one air convection hole 14. The design of the ring rib 15 has two different forms. First, Figure 3 In one embodiment, the height of the air guide groove 131 is further defined as a height T, and the thickness of the annular rib 15 is further defined as a height D, where height T > height D. This allows the high temperature within the receiving groove 11 to dissipate from the at least one air convection hole 14 due to the aforementioned height difference, enabling the high temperature to escape from the air guide groove 131 and be discharged through the openings 132 on both sides. Another embodiment of the annular rib 15 is described in [reference needed]. Figure 8 , Figure 9 As shown, when the height T equals the height position D, to prevent the outer surface of the annular rib 15 from blocking the high temperature flowing out of the at least one air convection hole 14 from the receiving groove 11, a side guide groove 151 is further recessed in part of the annular rib 15. One end of the side guide groove 151 is connected to the at least one air convection hole 14, and the other end is connected to the groove space of the air guide groove 131. This maintains the conductivity between the at least one air convection hole 14 and the air guide groove 131, allowing the high temperature in the receiving groove 11 to flow freely. After being guided out from the at least one air convection hole 14, the air is then guided to the air guide channel 131 via the side guide channel 151 and then guided out from each pair of openings 132. In addition, the bottom surface of the side guide channel 151 can also be an inclined surface. The size of the opening of the side guide channel 151 connecting the at least one air convection hole 14 and the opening of the side guide channel 151 connecting the air guide channel 131 is not limited. The important thing is that the temperature in the containing tank 11 can be discharged. It is not limited to the drawing shown in the figure.

[0036] The above describes the air guiding technology. The following describes the design technology of the at least one air convection hole 14. To prevent foreign objects from entering the receiving groove 11 through the at least one air convection hole 14, the at least one air convection hole 14 is further defined as a first opening 141. Opposite to the opening of the first opening 141, the at least one air convection hole 14 is defined as a second opening 142. The diameter of the second opening 142 is smaller than that of the first opening 141, and the inner diameter of the at least one air convection hole 14 gradually tapers to a cone shape from the first opening 141 towards the second opening 142. (See [link to relevant documentation]). Figure 6As shown, with at least one air convection hole 14 tapering in shape, foreign objects from the outside cannot enter the receiving groove 11 from the first opening 141, thereby protecting the operation of the magnetic attraction electronic control component 3. In addition, even if soft foreign objects such as dust are stuck at the second opening 142, the guide part 13 can carry the dust out by the guiding force, thereby preventing it from clogging the second opening 142.

[0037] Please also refer to... Figure 2 , Figure 4 , Figure 5 As shown, in order to enable the outer cover 1 to be assembled with a dedicated terminal block and control board (not shown in the figure), the outer cover 1 further includes a main cover portion 16 and two side cover portions 17 connected to both sides of the main cover portion 16. The outer cover 1 is T-shaped, and two lugs 18 extend from the angle where the main cover portion 16 and each side cover portion 17 are connected. The bottom of each lug 18 is recessed to form a side groove 181 and a notch 182 located around the side groove 181. The side groove 181, the notch 182, and the pair of openings 132 of each lug 18 are interconnected. A locking block 183 is protruding from the bottom surface of each side groove 181. In addition, two locking holes 184 pass through each lug 18 and the locking block 183 located in each lug 18. The locking holes 184 are mainly provided to allow screws to pass through and assemble the present invention at the mounting location, such as a terminal block base, panel, etc. In addition, each notch 182 further... Each lug 18 comprises an inner end 1821, an outer end 1822, and an inclined guide surface 1823 connecting the inner end 1821 and the outer end 1822. Each inner end 1821 is connected to the corresponding side groove 181 groove space, while each outer end 1822 is disposed on the outer periphery of each lug 18 and connected to each inner end 1821. Each inclined guide surface 1823 is inclined downward toward the outer end 1822 at the end connected to the inner end 1821. According to the above description, the high temperature in the receiving groove 11 is discharged through the at least one air convection hole 14, and then through the concave space of the air guide groove 131, and is discharged from each pair of openings 132, and is introduced into the side grooves 181 of each ear piece 18. With the side grooves 181, each notch 182 and each pair of openings 132 being interconnected, the high temperature collected in the receiving groove 11 can be discharged to the outside through each notch 182 and form a circulating convection.

[0038] See you again Figure 2 , Figure 5 , Figures 11 to 14As shown, another technical feature of the present invention is the base, which mainly forms a box portion 21 with an opening 211 protruding further on the side of the base 2 opposite to the receiving opening 12. A bottom cover 4 is movably assembled to the box portion 21 and closes the opening 211. The box portion 21 mainly provides a portion for housing the magnetic attraction electronic control component 3, and this area is also prone to high temperature generation. Therefore, at least one internal vent 41 is further provided on the side of the bottom cover 4 facing the inside of the box portion 21, and at least one external vent 42 is provided on the side of the bottom cover 4 facing outward and corresponding to the at least one internal vent 41. The at least one internal vent 41 and the at least one external vent 42 are connected; in addition, the diameter of the at least one external vent 42 is larger than the diameter of the at least one internal vent 41, or the diameter of the at least one external vent 42 is smaller than the diameter of the at least one internal vent 41. Although the slot space of the receiving groove 11 is used to receive the magnetic attraction electronic control component 3, it is still connected to the box part 21. Therefore, through the design of the receiving groove 11, at least one air convection hole 14 is connected to the internal vent 41 and the external vent 42, so that an air convection space area is formed inside the receiving groove 11. In this way, foreign objects are not easily blocked at the second end 142, the external vent 42, etc.

[0039] Continuing the above explanation, it was previously noted that there are two forms between the internal pores 41 and the external pores 42, see below. Figure 11 , Figure 12 As shown, when the diameter of the at least one external vent 42 is larger than that of the at least one internal vent 41, the at least one external vent 42 is further provided with a diversion rib 43. The diversion rib 43 is in the shape of a long straight plate. The diversion rib 43 separates the at least one external vent 42 to form two diversion ports 44. The diversion rib 43 and the at least one internal vent 41 are arranged at a distance to form two narrow flow ports 45. Each narrow flow port 45 is connected to each diversion port 44 and the at least one internal vent 41. In this way, the two diversion ports 44 and the diversion rib 43 can be used to block foreign objects from entering the box 21, but the air convection effect between the box 21 and the outside air is not lost, so that the box 21 is maintained at an appropriate temperature, so as to ensure the stability of the magnetic attraction electronic control component 3 in operation and conductive contact within the box 21; in addition to the above Figure 11 , Figure 12 In addition, Figure 13 , Figure 14 This is another embodiment of the inner vent 41 and outer vent 42 of the bottom cover 4. When the diameter of the at least one outer vent 42 is smaller than that of the at least one inner vent 41, the position of the diversion rib 43 becomes that of the at least one inner vent 41, so that the position to block foreign objects is simply at the at least one inner vent 41, but its function is the same. Figure 11 , Figure 12The above two embodiments illustrate that, by utilizing the diversion rib 43, the structure of either the at least one inner vent 41 or the at least one outer vent 42 is staggered. Furthermore, because the diameter of either the at least one inner vent 41 or the at least one outer vent 42 is divided by the diversion rib 43 to form two diversion ports 44, although the opening diameter is reduced, this effectively blocks other objects besides foreign matter, such as water droplets. Water droplets cannot penetrate at each diversion port 44 due to tension issues. This also prevents the parts inside the box 21 from having poor electrical conductivity due to water droplets, and eliminates the possibility of internal icing. Moreover, the aforementioned diversion rib 43 configuration improves the efficiency of mold making for the manufacturer.

[0040] The embodiments described above are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention, or reasonable combinations of solutions from various embodiments, are all within the scope of protection of the present invention.

Claims

1. A relay heat dissipation structure, characterized in that, include: An outer cover has a recessed groove on one side with a receiving opening, and a guide portion is further provided at any part of the surface of the outer cover. The guide portion is provided with at least one air convection hole that penetrates the receiving groove so that the at least one air convection hole is connected to the receiving groove. A base is installed on the side of the outer cover where the receiving opening is provided, and a magnetic suction and electronic control component is further installed on the side of the base corresponding to the receiving groove. The flow guide is designed to allow the temperature generated by the magnetic attraction electronic control component located in the receiving groove to be circulated through at least one air convection hole, thereby maintaining the operational efficiency of the magnetic attraction electronic control component.

2. The relay heat dissipation structure as described in claim 1, characterized in that, The flow guide further includes an air guide groove recessed towards the receiving groove, and the at least one air convection hole is penetrating through the bottom surface of the air guide groove and communicating with the receiving groove. The air guide groove is provided with a pair of openings at both ends. The high temperature in the receiving groove is discharged by the at least one air convection hole and circulated through the air guide groove space from each pair of openings.

3. The relay heat dissipation structure as described in claim 2, characterized in that, The bottom surface of the air guide groove and the corresponding arrangement of the at least one air convection hole are further provided with an annular rib, which surrounds the opening of the at least one air convection hole.

4. The relay heat dissipation structure as described in claim 3, characterized in that, The height of the air guide channel is further defined as a height (T), and the thickness of the annular rib is further defined as a height (D). The height (T) is equal to the height (D) or the height (T) is greater than the height (D).

5. The relay heat dissipation structure as described in claim 4, characterized in that, When the height (T) equals the height (D), the portion of the annular rib is further recessed to form a side guide groove. One end of the side guide groove is connected to the at least one air convection hole, and the other end of the side guide groove is connected to the groove space of the air guide groove. This allows the high temperature in the accommodating groove to be guided out from the at least one air convection hole, and then guided to the air guide groove via the side guide groove before being guided out from each pair of openings.

6. The relay heat dissipation structure as described in claim 1, characterized in that, The opening of the at least one air convection hole connected to the receiving groove is further defined as a first end, and the opening of the at least one air convection hole opposite to the first end is defined as a second end. The diameter of the second end is smaller than that of the first end, and the inner hole shape of the at least one air convection hole gradually narrows into a cone shape from the first end to the second end.

7. The relay heat dissipation structure as described in claim 2, characterized in that, The outer cover further includes a main cover and two side cover parts connected to both sides of the main cover. Two ear pieces extend from the angle where the main cover and each side cover are connected. The bottom of each ear piece is concave to form a side groove and a notch on the periphery of each side groove. The side groove, notch and opening of each ear piece are interconnected. A locking block is protruding from the bottom surface of each side groove. In addition, two lock holes pass through each ear piece and the locking block located in each ear piece. In addition, each notch further includes an inner end, an outer end, and an inclined guide surface connecting the inner end and the outer end. Each inner end is connected to the corresponding side groove space, while each outer end is located on the outer periphery of each ear piece and connected to each inner end. Each inclined guide surface is inclined downwards towards each outer end with one end connected to the inner end.

8. The relay heat dissipation structure as described in claim 1, characterized in that, The base protrudes further on the side opposite to the receiving opening to form a box portion with an opening, and a bottom cover is movably assembled to the box portion and closes the opening; the bottom cover has at least one internal air hole on the side facing the inside of the box portion, and at least one external air hole on the side facing outward and corresponding to the at least one internal air hole, the at least one internal air hole and the at least one external air hole are connected; in addition, the diameter of the at least one external air hole is larger than the diameter of the at least one internal air hole, or the diameter of the at least one external air hole is smaller than the diameter of the at least one internal air hole.

9. The relay heat dissipation structure as described in claim 8, characterized in that, When the diameter of the at least one external air hole is larger than that of the at least one internal air hole, the at least one external air hole is further provided with a flow-dividing rib. The flow-dividing rib separates the at least one external air hole to form two flow-dividing ports. The flow-dividing rib and the at least one internal air hole are spaced apart to form two fine flow ports, and each fine flow port is connected to each flow-dividing port.

10. The relay heat dissipation structure as described in claim 8, characterized in that, When the diameter of the at least one external air hole is smaller than that of the at least one internal air hole, the at least one internal air hole is further provided with a flow-dividing rib. The flow-dividing rib separates the at least one internal air hole to form two flow-dividing ports. The flow-dividing rib and the at least one external air hole are spaced apart to form two fine flow ports, and each fine flow port is connected to each flow-dividing port.

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