Electric energy metering box facilitating heat dissipation

Abstract

The utility model belongs to the technical field of electrical equipment, concretely relates to an electric energy metering box convenient for heat dissipation. Its include the box body that is equipped with the heat dissipation opening of top, and be located at the heat dissipation frame of box top, the inner chamber that has with the heat dissipation opening intercommunication in the heat dissipation frame, and the multiple installation mouth that is set up in the circumferential side wall, be equipped with double rainproof grating at each installation mouth, and this grating is composed of the first grid plate that the outside opening is downwards and the second grid plate that the inside opening is upwards, the position of second grid opening is higher than the corresponding first grid opening, thereby forms the tortuous ventilation channel of height misplacement, guarantees ventilation and radiates heat while effectively blocks rainwater from entering.

Description

Technical Field

[0001] This utility model belongs to the field of electrical equipment technology, specifically relating to an energy metering box that facilitates heat dissipation. Background Technology

[0002] An electricity metering box is an enclosure used to install electricity metering devices and protect internal electrical components. It is widely used in power distribution systems. Because the electrical components inside the box generate heat during operation, a heat dissipation structure is usually required on the enclosure to ensure that the equipment operates normally within a safe temperature range.

[0003] Existing electricity metering boxes mostly use louvered grilles for ventilation and heat dissipation. However, these grilles are generally single-layered with fixed opening directions, making it difficult to simultaneously achieve good ventilation and rain protection. For example, while common downward-facing louvered grilles can block vertically falling rainwater, in windy and rainy conditions, rainwater can still enter the grille openings at an angle, eventually seeping into the box and causing safety hazards such as moisture damage to electrical components and short circuits. Adding baffles or reducing the opening size to enhance rain protection significantly reduces ventilation efficiency, leading to insufficient heat dissipation. Therefore, there is an urgent need for an electricity metering box that facilitates heat dissipation. Utility Model Content

[0004] This utility model solves the problems mentioned in the background art by setting a heat dissipation frame connected to the heat dissipation opening on the top of the box, and installing a double rainproof grille consisting of a first grille plate with the outer opening facing downward and a second grille plate with the inner opening facing upward around the heat dissipation frame. The second grille opening is higher than the corresponding first grille opening, forming a tortuous ventilation channel with a high degree of misalignment, thereby achieving both ventilation and heat dissipation and rainproof performance.

[0005] The technical solution of this utility model is implemented as follows: an energy metering box with convenient heat dissipation includes a box body with a heat dissipation opening on the top, and further includes: A heat dissipation frame is located on the top of the housing, and has an inner cavity that communicates with the heat dissipation opening. The four sides of the heat dissipation frame are provided with multiple mounting ports that communicate with the inner cavity. A double rainproof grille is provided at each installation port. The double rainproof grille includes an outer first grille plate and an inner second grille plate. The first grille plate has a first grille opening facing downwards, and the second grille plate has a second grille opening facing upwards and corresponding one-to-one with the first grille opening. The second grille opening is positioned higher than the corresponding first grille opening, forming a highly misaligned, tortuous ventilation channel between the first and second grille openings.

[0006] The present invention is further configured such that the heat dissipation frame is detachably connected to the side wall of the housing via a first fastening bolt.

[0007] The present invention is further provided that the top of the heat dissipation frame is provided with an inclined eaves.

[0008] The present invention is further configured such that the heat dissipation opening is a frustoconical structure that is narrow at the top and wide at the bottom, and the heat dissipation opening extends into the inner cavity of the heat dissipation frame.

[0009] The present invention is further configured such that the first grid plate and the second grid plate are the same component, and the second grid plate is formed by rotating the first grid plate 180° and then installing it.

[0010] The present invention is further configured such that connecting plates extend from the upper and lower ends of the mounting port, and the first grid plate, the connecting plate and the second grid plate are connected by a second fastening bolt.

[0011] The present invention is further configured such that the double rainproof grilles are multiple sets, which are spaced apart along the left and right directions on the front and rear side walls of the heat dissipation frame, and spaced apart along the front and rear directions on the left and right side walls of the heat dissipation frame.

[0012] By adopting the above technical solution, the beneficial effects that this utility model can achieve are: 1. By having the openings of the inner and outer grilles facing opposite directions and at different heights, a tortuous ventilation channel is formed, which not only allows for ventilation but also doubles the barrier against rainwater entering, thus improving the overall heat dissipation and rainproof performance of the enclosure.

[0013] 2. The conical heat dissipation opening guides the convergence of hot air and the inclined surface facilitates airflow, allowing hot air to be efficiently discharged and any small amount of rainwater to be drained, thus improving the efficiency of hot air discharge and the reliability of internal waterproofing.

[0014] 3. By rotating the two grid plates 180° for interchangeable installation and by using bolts to detach the components, production, installation and maintenance are simplified, and the versatility of parts and ease of maintenance are improved. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall assembly structure of this utility model; Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure; Figure 3 yes Figure 2 A magnified structural diagram of part A.

[0016] The attached diagram is labeled as follows: 1. Box body; 2. Heat dissipation opening; 3. Heat dissipation frame; 4. Inner cavity; 5. Mounting port; 6. Double rainproof grille; 61. First grille plate; 62. Second grille plate; 7. First grille opening; 8. Second grille opening; 9. Tortuous ventilation channel; 10. First fastening bolt; 11. Eaves plate; 12. Connecting plate; 13. Second fastening bolt. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1-3 : Example:

[0018] This embodiment provides an energy metering box that facilitates heat dissipation, including a box body 1 with a heat dissipation opening 2 on the top, and further including: A heat dissipation frame 3 is located on the top of the housing 1. It has an inner cavity 4 that communicates with the heat dissipation opening 2. The four sides of the heat dissipation frame 3 are provided with a plurality of mounting ports 5 that communicate with the inner cavity 4. A double rainproof grille 6 is provided at each installation port 5. The double rainproof grille 6 includes an outer first grille plate 61 and an inner second grille plate 62. The first grille plate 61 has a downward-facing first grille opening 7, and the second grille plate 62 has an upward-facing second grille opening 8 that corresponds one-to-one with the first grille opening 7. The second grille opening 8 is positioned higher than the corresponding first grille opening 7, so as to form a highly misaligned tortuous ventilation channel 9 between the first grille opening 7 and the second grille opening 8.

[0019] The top of the housing 1 has a heat dissipation opening 2, which is a truncated cone-shaped structure that protrudes upwards, narrower at the top and wider at the bottom, and is integrally formed with the top of the housing 1. The wide opening at the bottom of the cone communicates with the internal space of the housing 1, while the narrow opening at the top of the cone extends upwards from the top surface of the housing 1. Hot air generated by the operation of the electrical components inside the housing 1 enters the wide opening of the cone during its ascent, gradually gathers along the inner wall of the cone, and is discharged upwards from the narrow opening. The outer slope of the cone also serves as a guide; when a small amount of moisture enters the inner cavity 4 of the heat dissipation frame 3 and falls to the outer slope of the cone, the moisture flows along the slope to the top surface of the housing 1 and is discharged outwards, without entering the interior of the housing 1.

[0020] The heat dissipation frame 3 is located on the top of the housing 1, and its interior is a hollow cavity 4 that runs vertically through the housing. The bottom of the heat dissipation frame 3 has an opening, which corresponds vertically to the heat dissipation opening 2 on the top of the housing 1. The frustoconical heat dissipation opening 2 extends upward into the cavity 4 of the heat dissipation frame 3. The bottom edge of the heat dissipation frame 3 is in contact with the top surface of the housing 1. Multiple bolt holes are provided at the lower end of the side wall of the heat dissipation frame 3, and corresponding bolt holes are also provided at the upper part of the side wall of the housing 1. The first fastening bolt 10 passes laterally through the bolt holes in the side wall of the heat dissipation frame 3 from the outside and is screwed into the bolt holes in the side wall of the housing 1, pressing the heat dissipation frame 3 firmly onto the top of the housing 1 through the threaded engagement. To disassemble, the heat dissipation frame 3 can be removed from the housing 1 by unscrewing the first fastening bolt 10.

[0021] Multiple mounting openings 5 ​​are provided on the front and rear side walls and the left and right side walls of the heat dissipation frame 3. The mounting openings 5 ​​are through openings on the side walls, connecting the inner cavity 4 of the heat dissipation frame 3 with the external space. A connecting plate 12 extends from the upper and lower ends of each mounting opening 5 toward the center of the mounting opening 5. The connecting plate 12 is aligned with the wall surface of the corresponding side wall, and the two side surfaces of the connecting plate 12 are in contact with the inner side of the first grille plate 61 and the outer side of the second grille plate 62 that are subsequently installed. The connecting plate 12 has through holes for the second fastening bolt 13 to pass through.

[0022] Double rainproof grilles 6 are installed at each mounting opening 5. Each double rainproof grille 6 is composed of a first grille plate 61 and a second grille plate 62 stacked one behind the other. The first grille plate 61 is located on the outside of the mounting opening 5, and the second grille plate 62 is located on the inside of the mounting opening 5. Both the first grille plate 61 and the second grille plate 62 adopt a louvered structure, that is, multiple openings are opened at intervals along the vertical direction on the plate body, and each opening has an integrally formed cover extending outward from the plate body. The cover and the corresponding opening together determine the ventilation direction.

[0023] The first grille plate 61 is installed with its opening facing downwards. The cover of the first grille plate 61 is located above the corresponding opening, and extends downwards and outwards from the plate body, causing external air to enter the first grille opening 7 from a slightly upward position. Rainwater falling vertically or at an angle is blocked from entering the opening due to the cover's position above it. The second grille plate 62 is installed with its opening facing upwards. The cover of the second grille plate 62 is located below the corresponding opening, and extends upwards and inwards from the plate body, causing air entering from the first grille opening 7 to be deflected upwards before passing through the second grille opening 8 into the inner cavity 4 of the heat dissipation frame 3.

[0024] Each second grille opening 8 on the second grille plate 62 corresponds one-to-one with each first grille opening 7 on the first grille plate 61 in the front-to-back direction. The upper end of the opening of the second grille opening 8 is higher than the lower end of the opening of the corresponding first grille opening 7, thus forming a tortuous ventilation channel 9 with a high degree of misalignment between the two grille plates. After the air enters from the first grille opening 7, it does not flow horizontally in a straight line, but first flows obliquely upward to the first grille opening 7, and then enters the inner cavity 4 obliquely downward through the second grille opening 8. This tortuous channel maintains air circulation while forming a double barrier against moisture entering with the airflow: the outer first grille plate 61 blocks most of the rainwater with its downward-facing opening, and the small amount of moisture that breaks through the first grille opening 7 is restricted by the upward-facing and higher opening position of the inner second grille plate 62, making it difficult for it to continue to climb over the second grille opening 8, thus preventing it from easily entering the inner cavity 4 of the heat dissipation frame 3 and the interior of the housing 1.

[0025] The first grid plate 61 and the second grid plate 62 are the same component. The two plates have identical external dimensions, number of openings, opening shapes, cover structure, and mounting hole positions. The second grid plate 62 is obtained by rotating the same component 180 degrees around a center line perpendicular to the plate surface. Before rotation, the openings of the component face downwards; after rotation, the openings face upwards, and the positions of the upper and lower edges of each opening are reversed, naturally creating a height misalignment relationship where the upper end of the second grid opening 8 is higher than the lower end of the corresponding first grid opening 7. To ensure that the mounting holes can still align with the through holes on the connecting plate 12 after rotation, the mounting holes on the grid plate are symmetrically distributed in the vertical direction of the plate.

[0026] The connection between the double rainproof grille 6 and the heat dissipation frame 3 is as follows: the first grille plate 61 and the second grille plate 62 are respectively attached to the two sides of the connecting plate 12 at the upper and lower ends of the mounting port 5, and the connecting plate 12 is clamped between the first grille plate 61 and the second grille plate 62. The second fastening bolt 13 passes horizontally from the outside through the mounting holes on the first grille plate 61, the through holes on the connecting plate 12, and the mounting holes on the second grille plate 62. The end of the second fastening bolt 13 is screwed into the nut on the inside of the second grille plate 62 and tightened. After tightening, the first grille plate 61, the connecting plate 12, and the second grille plate 62 are pressed tightly together, and neither the first grille plate 61 nor the second grille plate 62 can move relative to the connecting plate 12. The double rainproof grille 6 is reliably fixed in the mounting port 5. To disassemble, unscrew the nut and pull out the second fastening bolt 13 to remove the two grille plates from the mounting port 5.

[0027] The top of the heat dissipation frame 3 is provided with an eaves plate 11. The eaves plate 11 covers the top surface of the heat dissipation frame 3, and its surface is inclined relative to the horizontal plane. The inclination direction allows rainwater falling on the eaves plate 11 to flow along the surface of the plate to the outer edge of the heat dissipation frame 3 and be discharged, without accumulating on the top of the heat dissipation frame 3. The eaves plate 11 and the heat dissipation frame 3 are integrally formed structures or connected by welding, keeping the top closed and preventing rainwater from falling directly into the inner cavity 4 of the heat dissipation frame 3 from above.

[0028] The double rainproof grilles 6 are arranged on the side walls of the heat dissipation frame 3 as follows: on the front and rear side walls of the heat dissipation frame 3, the double rainproof grilles 6 are arranged alternately in the left-right direction; on the left and right side walls of the heat dissipation frame 3, the double rainproof grilles 6 are arranged alternately in the front-back direction. The mounting ports 5 are separated by solid areas of the side walls to ensure the overall structural strength of the heat dissipation frame 3, while forming multiple dispersed exhaust areas.

[0029] The working process of the electricity metering box in this application is as follows: The electrical components inside the box 1 generate heat, causing the air inside to rise. This air then converges and is guided through the frustum-shaped heat dissipation opening 2 before entering the inner cavity 4 of the heat dissipation frame 3 through a narrow opening. The hot air diffuses outwards within the inner cavity 4 of the heat dissipation frame 3, reaching the mounting openings 5 ​​on each side wall. It then enters the space between the two grid plates through the second grid opening 8 of the inner second grid plate 62, and then flows through the first grid opening 7 of the outer first grid plate 61 to the outside, completing the natural convection discharge process from the inside of the box 1 to the outside. Under normal circumstances, external rainwater is doubly blocked by the downward-facing opening of the first grid plate 61 and the upward-facing opening of the second grid plate 62, preventing it from entering the inner cavity 4 of the heat dissipation frame 3. A very small amount of water that enters the inner cavity 4 under strong winds and rain falls onto the outer slope of the frustum and is guided to the top surface of the box 1 for discharge, thus ensuring the dryness and safe operation of the electrical components inside the box 1.

[0030] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. An energy metering box with convenient heat dissipation, comprising a box body (1) with a heat dissipation opening (2) on the top, characterized in that, Also includes: A heat dissipation frame (3) is located on the top of the box (1), and has an inner cavity (4) that communicates with the heat dissipation opening (2). The heat dissipation frame (3) has multiple mounting ports (5) that communicate with the inner cavity (4) on its four sides. A double rainproof grille (6) is provided at each installation port (5). The double rainproof grille (6) includes an outer first grille plate (61) and an inner second grille plate (62). The first grille plate (61) has a first grille opening (7) facing downwards, and the second grille plate (62) has a second grille opening (8) facing upwards and corresponding one-to-one with the first grille opening (7). The second grille opening (8) is positioned higher than the corresponding first grille opening (7) to form a highly misaligned tortuous ventilation channel (9) between the first grille opening (7) and the second grille opening (8).

2. The energy metering box with convenient heat dissipation according to claim 1, characterized in that, The heat dissipation frame (3) is detachably connected to the side wall of the housing (1) by the first fastening bolt (10).

3. The energy metering box with convenient heat dissipation according to claim 1, characterized in that, The top of the heat dissipation frame (3) is provided with an inclined eaves plate (11).

4. The energy metering box with convenient heat dissipation according to claim 1, characterized in that, The heat dissipation opening (2) is a frustum-shaped structure that is narrow at the top and wide at the bottom, and the heat dissipation opening (2) extends into the inner cavity (4) of the heat dissipation frame (3).

5. The energy metering box with easy heat dissipation according to claim 1, characterized in that, The first grating plate (61) and the second grating plate (62) are the same component. The second grating plate (62) is formed by rotating the first grating plate (61) by 180° and then installing it.

6. The energy metering box with convenient heat dissipation according to claim 1, characterized in that, The upper and lower ends of the mounting port (5) are connected by connecting plates (12), and the first grid plate (61), the connecting plate (12) and the second grid plate (62) are connected by a second fastening bolt (13).

7. The energy metering box with convenient heat dissipation according to claim 1, characterized in that, The double rainproof grilles (6) are in multiple sets, and are spaced apart on the front and rear side walls of the heat dissipation frame (3) in the left and right directions, and spaced apart on the left and right side walls of the heat dissipation frame (3) in the front and rear directions.

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