Charger with multiple protection structure

Abstract

This utility model relates to the field of power electronic equipment protection technology, and discloses a charger with a multi-protection structure, including a chassis and a front cover. A first aviation connector is provided on the left side of the chassis, the front cover is provided at the front end of the chassis, and a back plate is provided at the rear end of the chassis. Through openings are provided at the front and rear of the chassis. Mounting plates are fixedly connected to the top and bottom of the rear end of the back plate, and a positioning screw is movably connected to the front end of the front cover. This charger with a multi-protection structure establishes a three-level protection system of "surface coating - potting protection - cavity isolation" by setting up a circuit board and a protective layer. The conformal coating (preferably modified polyurethane material) forms the first molecular barrier, and the potting compound layer (3-10mm thick) achieves overall coverage. A 2mm buffer gap is reserved in the shell, solving the problems of decreased heat dissipation performance due to the potting process, the inability of the conformal coating alone to cope with condensation corrosion, and the lack of dynamic self-maintenance capability.

Description

Technical Field

[0001] This utility model relates to the field of power electronic equipment protection technology, specifically a charger with multiple protection structures. Background Technology

[0002] A charger is a power conversion device whose core function is to safely and efficiently convert external power sources (such as solar energy, mains power, etc.) into voltage and current suitable for the load through power management technology. Chargers are widely used in many fields, such as electric vehicles, industrial equipment, and medical equipment.

[0003] Based on the existing charger design, the potting process leads to a decrease in heat dissipation performance, the conformal coating alone cannot cope with the corrosion of condensation, and the IP54 standard relies heavily on passive protection and lacks dynamic self-maintenance capabilities.

[0004] Now, a novel charger with a multi-protection structure is proposed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a charger with a multi-protection structure to solve the problems mentioned in the background art, such as the reduced heat dissipation performance caused by the potting process, the inability of the three-proof paint to cope with condensation corrosion when used alone, and the lack of dynamic self-maintenance capability.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a charger with a multi-protection structure, comprising a chassis and a front cover. A first aviation connector is provided on the left side of the chassis, the front cover is provided at the front end of the chassis, a back plate is provided at the rear end of the chassis, and through openings are provided at the front and rear of the chassis. Mounting plates are fixedly connected to the top and bottom of the rear end of the back plate, a positioning screw is movably connected to the front end of the front cover, a display screen is provided at the front end of the front cover, a button is provided at the bottom of the display screen, a charging port is provided on the right side of the front end of the front cover, a second aviation connector is provided on the right side of the chassis, an air inlet is provided on the chassis on one side of the second aviation connector, a waterproof interface is provided on the chassis at the bottom end of the second aviation connector, a circuit board is fixedly installed at the rear end of the front cover, and a protective layer is fixedly connected to the outside of the circuit board.

[0007] As a further technical solution of this utility model, the protective layer comprises a conformal coating layer and a potting compound layer. The potting compound layer is made of modified epoxy resin material with a thermal conductivity ≥0.8W / (m·K) and a volume resistivity >1×10⁻⁶. 15 Ω·cm.

[0008] As a further technical solution of this utility model, a heat dissipation vent is provided on the left side of the chassis, and an axial fan assembly, a centrifugal exhaust assembly, and an atomizing guide cavity are provided inside the chassis. The inner wall of the atomizing guide cavity is provided with spiral guide ribs, which form a cyclone acceleration effect with the axial fan assembly.

[0009] As a further technical solution of this utility model, the inside of the chassis is provided with a labyrinth-type drainage channel, and the outside of the labyrinth-type drainage channel is coated with a nano-hydrophobic coating.

[0010] As a further technical solution of this utility model, an air intake module is installed inside the chassis. The air intake module includes 45° inclined louver blades and a fan arranged in an array, with the ratio of the blade spacing to the fan diameter being 1:3.5.

[0011] As a further technical solution of this utility model, the waterproof interface is provided in two sets.

[0012] Compared with the prior art, the beneficial effects of this utility model are: the charger with multiple protection structures not only realizes multiple protections for the circuit board and intelligent air cooling, but also realizes the function of self-cleaning dust.

[0013] (1) By setting up a circuit board and a protective layer, the circuit board is fixedly installed at the rear end of the front cover, and the protective layer is fixedly connected to the outside of the circuit board, a three-level protection of "surface coating - potting protection - cavity isolation" is established. The three-proof paint (preferably modified polyurethane material) forms the first molecular barrier, and the potting adhesive layer (thickness 3-10mm) achieves overall coverage. The shell reserves a 2mm buffer gap.

[0014] (2) By setting up an axial fan group, an atomizing guide cavity, a centrifugal exhaust component, and an air inlet, and utilizing the heat dissipation vent on the left side of the chassis, the chassis is equipped with an axial fan group, a centrifugal exhaust component, and an atomizing guide cavity. The inner wall of the atomizing guide cavity is provided with spiral guide ribs, which form a cyclone acceleration effect with the axial fan group. The combination mode of "positive pressure air supply + negative pressure air exhaust" is adopted, and the air supply volume is 15% larger than the exhaust volume to form an internal positive pressure environment. Combined with the cyclone atomization effect in the guide cavity (water droplet size <50μm), the liquid evaporation is accelerated.

[0015] (3) By setting up an air inlet module and a centrifugal exhaust component, and setting a V-shaped guide groove (section angle 120°) at the bottom of the louver, and cooperating with a periodic variable frequency fan (speed adjustable from 1000 to 11000 rpm) to generate pulse airflow to achieve self-cleaning of dust. Attached Figure Description

[0016] Figure 1 This is a frontal cross-sectional view of the present invention.

[0017] Figure 2 This is a schematic diagram of the internal right side view of the chassis of this utility model;

[0018] Figure 3 This is a schematic diagram of the left side view of the chassis of this utility model;

[0019] Figure 4 This is a top view of the internal structure of the chassis of this utility model.

[0020] In the diagram: 1. Chassis; 2. Heat dissipation vent; 3. Front cover; 4. Positioning screw; 5. Display screen; 6. Button; 7. Mounting plate; 8. First aviation connector; 9. Circuit board; 10. Protective layer; 11. Axial fan assembly; 12. Air intake module; 13. Centrifugal exhaust assembly; 14. Charging port; 15. Second aviation connector; 17. Labyrinth-style drainage channel; 18. Back panel; 19. Air inlet; 20. Atomizing guide cavity. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4 This utility model provides an embodiment of a charger with a multi-protection structure, including a chassis 1 and a front cover 3. A first aviation connector 8 is provided on the left side of the chassis 1, the front cover 3 is provided at the front end of the chassis 1, and a back plate 18 is provided at the rear end of the chassis 1. The chassis 1 has through openings at the front and rear. Mounting plates 7 are fixedly connected to the top and bottom of the rear end of the back plate 18, respectively. A positioning screw 4 is movably connected to the front end of the front cover 3. A display screen 5 is provided at the front end of the front cover 3. A button 6 is provided at the bottom of the display screen 5. A charging port 14 is provided on the right side of the front end of the front cover 3. A second aviation connector 15 is provided on the right side of the chassis 1. An air inlet 19 is provided on the chassis 1 on one side of the second aviation connector 15. A waterproof interface 16 is provided on the chassis 1 at the bottom of the second aviation connector 15. A circuit board 9 is fixedly installed at the rear end of the front cover 3. A protective layer 10 is fixedly connected to the outside of the circuit board 9.

[0023] The protective layer 10 includes a conformal coating and a potting compound layer. The potting compound layer is made of modified epoxy resin material with a thermal conductivity ≥0.8W / (m·K) and a volume resistivity >1×10⁻⁶. 15 Ω·cm;

[0024] Two sets of waterproof interfaces 16 are provided;

[0025] Specifically, such as Figure 1 and Figure 2 As shown, the modified epoxy resin (model: BN-RT400-6C) is vacuum-infused in two stages. The first stage involves infusing 60% of the volume and curing for 2 hours. The second stage involves infusing until complete coverage is achieved, establishing a three-level protection system of "surface coating - potting protection - cavity isolation". The conformal coating (preferably modified polyurethane material) forms the first molecular barrier, and the potting adhesive layer (3-10mm thick) achieves overall coverage. A 2mm buffer gap is reserved in the shell.

[0026] The left side of the chassis 1 is provided with a heat dissipation vent 2. Inside the chassis 1 are an axial fan assembly 11, a centrifugal exhaust assembly 13 and an atomizing guide cavity 20. The inner wall of the atomizing guide cavity 20 is provided with spiral guide ribs, which form a cyclone acceleration effect with the axial fan assembly 11.

[0027] Specifically, such as Figure 1 , Figure 2 and Figure 4 As shown, a "positive pressure air supply + negative pressure air exhaust" combination mode is adopted, with the air intake volume being 15% larger than the exhaust volume to form an internal positive pressure environment. Combined with the cyclone atomization effect (water droplet size <50μm) in the guide cavity, the liquid evaporation is accelerated.

[0028] The air intake module 12 is installed inside the chassis 1. The air intake module 12 includes 45° inclined louver blades and a fan arranged in an array. The ratio of the blade spacing to the fan diameter is 1:3.5.

[0029] The interior of the chassis 1 is equipped with a labyrinth-style drainage channel 17, and the exterior of the labyrinth-style drainage channel 17 is coated with a nano-hydrophobic coating.

[0030] Specifically, such as Figure 1 , Figure 2 and Figure 4 As shown, a V-shaped airflow channel (120° cross-section angle) is set at the bottom of the louver, which, together with a periodic variable frequency fan (adjustable speed 1000-11000rpm), generates pulse airflow to achieve self-cleaning of dust.

[0031] Working Principle: In use, this invention first involves vacuum-injecting modified epoxy resin (model: BN-RT400-6C) in two stages. The first stage involves injecting 60% of the volume and curing for 2 hours. The second stage involves injecting to completely cover the surface, establishing a three-level protection system of "surface coating - potting protection - cavity isolation." The conformal coating (preferably modified polyurethane material) forms the first molecular barrier, and the potting adhesive layer (3-10mm thick) achieves overall coverage. A 2mm buffer gap is reserved in the shell. Then, a combination of "positive pressure air supply + negative pressure exhaust" is adopted, with the air intake volume being 15% greater than the exhaust volume to create an internal positive pressure environment. Combined with the cyclone atomization effect (water droplet size <50μm) in the guide cavity, liquid evaporation is accelerated. Finally, a V-shaped guide groove (120° cross-sectional angle) is set at the bottom of the louvers, which, together with a periodic variable frequency fan (adjustable speed 1000-11000rpm), generates pulse airflow to achieve self-cleaning of dust.

[0032] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A charging machine with multiple protection structure, comprising a cabinet (1) and a front cover plate (3), characterized in that: The chassis (1) has a first aviation connector (8) on its left side, a front cover plate (3) at its front end, a back plate (18) at its rear end, and through openings at the front and rear. Mounting plates (7) are fixedly connected to the top and bottom of the rear end of the back plate (18). A positioning screw (4) is movably connected to the front end of the front cover plate (3). A display screen (5) is located at the front end of the front cover plate (3), and a bottom of the display screen (5) is provided with… There is a button (6), a charging port (14) is provided on the right side of the front end of the front cover (3), a second aviation connector (15) is provided on the right side of the chassis (1), an air inlet (19) is provided on the chassis (1) on one side of the second aviation connector (15), a waterproof interface (16) is provided on the chassis (1) at the bottom end of the second aviation connector (15), a circuit board (9) is fixedly installed at the rear end of the front cover (3), and a protective layer (10) is fixedly connected to the outside of the circuit board (9).

2. The charger with multiple protection structure according to claim 1, characterized in that: The protective layer (10) comprises a three-proof paint coating layer and a potting adhesive layer, the potting adhesive layer adopts a modified epoxy resin material, the thermal conductivity coefficient is greater than or equal to 0.8 W / (m K), and the volume resistivity is greater than 1x10 15 Ω cm.

3. The charger with multiple protection structure according to claim 1, characterized in that: The chassis (1) has a heat dissipation vent (2) on the left side. The chassis (1) is equipped with an axial fan assembly (11), a centrifugal exhaust assembly (13), and an atomizing guide cavity (20). The inner wall of the atomizing guide cavity (20) is provided with spiral guide ribs, which form a cyclone acceleration effect with the axial fan assembly (11).

4. The charger with multiple protection structure according to claim 1, characterized in that: The interior of the chassis (1) is provided with a labyrinthine drainage channel (17), and the exterior of the labyrinthine drainage channel (17) is coated with a nano-hydrophobic coating.

5. A charger with a multi-protection structure according to claim 1, characterized in that: The chassis (1) is equipped with an air intake module (12), which includes 45° inclined louver blades and a fan arranged in an array, with the blade spacing to fan diameter ratio being 1:3.

5.

6. The charger with multiple protection structure according to claim 1, characterized in that: The waterproof interface (16) is provided in two sets.

Images