Switching power supply shell with electromagnetic compatibility function

Abstract

The invention relates to the field of electrical equipment, and discloses a switching power supply shell with an electromagnetic compatibility function, which comprises a switching power supply shell, and the switching power supply shell comprises an electronic device heat dissipation structure, an equipment theme heat dissipation structure, a main body electromagnetic wave leakage sealing structure and a fan electromagnetic leakage prevention structure, the electronic device heat dissipation structure comprises a shell main body, heat dissipation teeth, heat conduction glue, an equipment theme heat dissipation structure metal heat conduction partition plate, heat dissipation teeth, air outlet teeth, air inlet teeth and a fan, the main body electromagnetic wave leakage sealing structure comprises the shell main body, the metal heat conduction partition plate, conductive rubber and a lower cover plate, and the fan electromagnetic leakage prevention structure comprises an air inlet waveguide and an air outlet waveguide plate. The heat conduction efficiency is effectively improved through the integrated design, electromagnetic leakage of a shell gap is avoided, external electromagnetic interference is blocked, electromagnetic leakage of a fan coil can be prevented through the arrangement of an air inlet waveguide and an air outlet waveguide plate, and the use requirements of occasions with certain requirements for electromagnetic compatibility are met.

Description

Technical Field

[0001] This invention belongs to the field of electrical equipment technology, specifically a switching power supply housing with electromagnetic compatibility function. Background Technology

[0002] A switching power supply is a power supply device that uses a circuit to control a switching transistor to quickly turn on and off, converting direct current (DC) into high-frequency alternating current (AC), which is then transformed by a transformer to provide a stable voltage. Currently, the casing of switching power supplies commonly uses thin-walled metal sheets as raw material. These sheets are processed through shearing, punching, cutting (or laser cutting), CNC bending, and stamping, and then assembled into a complete housing through welding, riveting, and splicing. In use, the relevant electrical and electronic components and electronic equipment are installed inside the casing. The remaining cover plate is then fixed to the outer surface of the casing with screws, creating a closed space to protect the internal electrical and electronic components and electronic equipment.

[0003] However, common switching power supplies generate a lot of heat during operation. Most switching power supply casings use fans for ventilation and heat dissipation, with perforated air inlets and outlets. The equipment is connected by screws, which is not airtight and is prone to electromagnetic leakage and electromagnetic interference. In addition, the heat dissipation fins are connected to the main body of the casing with fasteners, which reduces the effective heat conduction area and results in poor heat dissipation. Summary of the Invention

[0004] The purpose of this invention is to provide a switching power supply housing with electromagnetic compatibility functionality in order to solve the problems mentioned above.

[0005] The technical solution adopted in this invention is as follows: A switching power supply housing with electromagnetic compatibility function includes a switching power supply housing, wherein the switching power supply housing includes an electronic device heat dissipation structure, a main device heat dissipation structure, a main electromagnetic wave leakage sealing structure, and a fan-proof electromagnetic leakage structure. The electronic device heat dissipation structure includes a housing body, heat dissipation fins, and thermally conductive adhesive. The main device heat dissipation structure includes a metal thermally conductive partition, heat dissipation fins, exhaust fins, inlet fins, and a fan. The main electromagnetic wave leakage sealing structure includes a housing body, a metal thermally conductive partition, conductive rubber, and a lower cover plate. The fan-proof electromagnetic leakage structure includes an inlet waveguide and an outlet waveguide plate.

[0006] By adopting the above technical solution, during the operation of the equipment, electronic components are placed in a five-sided metal-covered space consisting of the main body of the casing and a metal heat-conducting partition. Conductive rubber is then placed in the heat-conducting rubber fixing groove, and the lower cover is fixed with connecting screws, forming a six-sided metal-covered sealed space. Injecting conductive rubber into the interior allows the heat generated by the electronic components to be transferred to the heat dissipation fins above the metal heat-conducting partition. Driven by a fan, airflow flows from the air inlet waveguide and air inlet fins, passing through the heat dissipation fins to carry away the heat. The air is then blown out through the air outlet fins and air outlet waveguide. The integrated design of the heat dissipation fins, metal heat-conducting partition, and main body of the casing effectively improves heat conduction efficiency, prevents electromagnetic leakage from casing gaps, blocks external electromagnetic interference, and prevents electromagnetic leakage from the fan coil through the air inlet and air outlet waveguides, meeting the requirements for use in applications with certain electromagnetic compatibility requirements.

[0007] In a preferred embodiment, a metal heat-conducting partition is fixedly connected to the middle of the outer shell body, and a six-sided metal-covered sealed space is formed below the metal heat-conducting partition, between the outer shell body, the metal heat-conducting partition and the lower cover plate.

[0008] By adopting the above technical solutions, the integrated design of heat dissipation fins, metal thermally conductive baffles, and the main body of the outer shell effectively improves the heat conduction efficiency, avoids electromagnetic leakage from the gaps in the outer shell, and blocks external electromagnetic interference.

[0009] In a preferred embodiment, an outer edge fixing bracket is welded to the lower outer edge of the outer shell body, and a thermally conductive rubber fixing groove is provided at the bottom of the outer edge fixing bracket. Conductive rubber is placed inside the thermally conductive rubber fixing groove, and the lower part of the thermally conductive rubber fixing groove is fixedly connected to the lower cover plate by connecting screws.

[0010] By adopting the above technical solution, it is convenient to install and maintain internal electronic components. The conductive rubber reduces the gap between the lower cover and the outer edge fixing frame of the bottom of the main body, thereby reducing electromagnetic leakage and blocking external electromagnetic interference.

[0011] In a preferred embodiment, a six-sided metal-covered sealed space is formed between the outer shell body, the metal thermally conductive partition and the lower cover plate. Electronic devices are placed inside the six-sided metal-covered sealed space, and thermally conductive adhesive is poured into the six-sided metal-covered sealed space.

[0012] By adopting the above technical solutions, internal sealing can be guaranteed, electromagnetic leakage can be reduced, external electromagnetic interference can be blocked, and good heat dissipation can be ensured.

[0013] In a preferred embodiment, uniformly distributed heat dissipation denticles are fixedly connected above the metal thermally conductive partition.

[0014] By adopting the above technical solution, the heat generated by the operation of electronic devices can be conducted to the heat dissipation teeth above the metal thermally conductive partition through the thermally conductive adhesive.

[0015] In a preferred embodiment, air outlet teeth and air inlet teeth are respectively provided on the front and rear sides of the outer shell body. The air outlet teeth and air inlet teeth are located above the metal heat-conducting partition plate, and the air outlet teeth and air inlet teeth correspond one-to-one with the heat dissipation teeth axially.

[0016] By adopting the above technical solution, ventilation can be formed to remove the heat from the heat dissipation fins.

[0017] In a preferred embodiment, an air outlet waveguide plate is fixedly connected to the rear side of the outer shell body, and the air outlet waveguide plate corresponds to the horizontal height of the air outlet teeth.

[0018] By adopting the above technical solution, heated air can be blown out, and raising the air outlet waveguide plate can prevent the electromagnetic flux of the fan coil from leaking out from the air outlet teeth.

[0019] In a preferred embodiment, a fan bracket is fixedly connected to the front of the outer casing, and a fan is fixedly connected to the front side of the fan bracket, with the fan and the air inlet tooth corresponding at the same horizontal height.

[0020] By adopting the above technical solutions, airflow can be provided for heat dissipation, forming active heat dissipation and improving heat dissipation efficiency.

[0021] In a preferred embodiment, an air inlet waveguide is fixedly connected to the outside of the fan, and the air inlet waveguide corresponds to the horizontal height of the fan.

[0022] By adopting the above technical solution, the electromagnetic flux of the fan coil can be prevented from leaking from the air inlet teeth.

[0023] In a preferred embodiment, an upper cover plate is fixedly connected to the top of the outer casing body, and a fan cover plate is fixedly connected to the outer side of the fan and the air inlet waveguide.

[0024] By adopting the above technical solution, the upper cover plate can form an air duct inside the air inlet teeth, heat dissipation teeth, and air outlet teeth, thereby enhancing the heat dissipation effect. In addition, the upper cover plate and fan cover plate can prevent dust from accumulating inside the equipment and affecting heat dissipation.

[0025] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: During operation, electronic components are placed within a five-sided metal-covered space consisting of the main casing and a metal thermally conductive partition. Conductive rubber is then placed within a groove for fixing the thermally conductive rubber, and the lower cover is secured with screws, forming a six-sided metal-covered, sealed space. Injecting conductive rubber allows heat generated by the electronic components to be transferred to the heat dissipation fins above the metal thermally conductive partition. Powered by a fan, airflow from the inlet waveguide and inlet fins, through the heat dissipation fins, carries away the heat, and then exits through the outlet fins and outlet waveguide. The integrated design of the heat dissipation fins, metal thermally conductive partition, and main casing effectively improves heat conduction efficiency, prevents electromagnetic leakage from casing gaps, blocks external electromagnetic interference, and prevents electromagnetic leakage from the fan coil, meeting the requirements for applications with electromagnetic compatibility. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the device of the present invention; Figure 2 This is a top-view diagram of the overall exploded structure of the device in this invention; Figure 3 This is a schematic diagram of the overall exploded, bottom-view structure of the device in this invention.

[0027] The markings in the diagram are: 1. Lower cover plate; 2. Conductive rubber; 3. Thermally conductive adhesive; 4. Electronic components; 5. Fan cover plate; 6. Upper cover plate; 7. Air inlet waveguide plate; 8. Main body of the outer casing; 9. Fan bracket; 10. Fan; 11. Heat dissipation teeth; 12. Metal thermally conductive partition plate; 13. Thermally conductive rubber fixing groove; 14. Connecting screw; 15. Outer edge fixing bracket; 16. Air outlet teeth; 17. Air inlet teeth; 18. Air outlet waveguide plate. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. 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. Example

[0029] Reference Figure 1-3A switching power supply housing with electromagnetic compatibility (EMC) function includes a switching power supply housing, which comprises an electronic component heat dissipation structure, a main device heat dissipation structure, a main electromagnetic wave leakage sealing structure, and a fan-proof electromagnetic leakage structure. The electronic component heat dissipation structure includes a housing body 8, heat dissipation fins 11, and thermally conductive adhesive 3. The main device heat dissipation structure includes a metal thermally conductive baffle 12, heat dissipation fins 11, exhaust fins 16, inlet fins 17, and a fan 10. The main electromagnetic wave leakage sealing structure includes the housing body 8, the metal thermally conductive baffle 12, the conductive rubber 2, and the lower cover plate 1. The fan-proof electromagnetic leakage structure includes an inlet waveguide 7 and an outlet waveguide plate 18.

[0030] During operation, the electronic components 4 are placed in a five-sided metal-covered space consisting of the main body 8 and the metal thermally conductive partition 12. Then, conductive rubber 2 is placed in the thermally conductive rubber fixing groove 13, and the lower cover plate 1 is fixed with connecting screws 14, forming a six-sided metal-covered sealed space. Injecting conductive rubber 2 into the space allows the heat generated by the electronic components to be transferred to the heat dissipation teeth 11 above the metal thermally conductive partition 12. Powered by the fan 10, airflow from the inlet waveguide 7 and inlet teeth 17 flows through the heat dissipation teeth 11, carrying away the heat. The air is then blown out through the outlet teeth 16 and outlet waveguide 18. The integrated design of the heat dissipation teeth 11, the metal thermally conductive partition 12, and the main body 8 effectively improves heat conduction efficiency, prevents electromagnetic leakage from gaps in the housing, and blocks external electromagnetic interference. Furthermore, the inlet waveguide 7 and outlet waveguide 18 prevent electromagnetic leakage from the fan coil, meeting the requirements for applications with electromagnetic compatibility.

[0031] A metal heat-conducting baffle 12 is fixedly connected to the middle of the outer shell body 8. Below the metal heat-conducting baffle 12, a six-sided metal-covered sealed space is formed between the outer shell body 8, the metal heat-conducting baffle 12, and the lower cover plate 1. The integrated design of the heat dissipation fins 11, the metal heat-conducting baffle 12, and the outer shell body 8 effectively improves the heat conduction efficiency, avoids electromagnetic leakage from the gaps in the outer shell, and blocks external electromagnetic interference.

[0032] An outer edge fixing bracket 15 is welded to the lower outer edge of the main body 8. A thermally conductive rubber fixing groove 13 is provided at the bottom of the outer edge fixing bracket 15. Conductive rubber 2 is placed inside the thermally conductive rubber fixing groove 13. The lower part of the thermally conductive rubber fixing groove 13 is fixedly connected to the lower cover plate 1 by connecting screws 14. This facilitates the installation and maintenance of internal electronic components. Furthermore, the conductive rubber 2 reduces the gap between the lower cover plate 1 and the bottom outer edge fixing bracket 15 of the main body 8, reducing electromagnetic leakage and blocking external electromagnetic interference.

[0033] The outer casing 8, the metal thermally conductive partition 12, and the lower cover 1 form a six-sided metal-covered sealed space. Electronic components 4 are placed inside this six-sided metal-covered sealed space, which is also filled with thermally conductive adhesive 3. This ensures internal sealing, reduces electromagnetic leakage, blocks external electromagnetic interference, and guarantees good heat dissipation.

[0034] A uniformly distributed heat dissipation fin 11 is fixedly connected above the metal thermally conductive partition 12. The heat generated by the operation of the electronic device 4 can be conducted to the heat dissipation fin 11 above the metal thermally conductive partition 12 through the thermally conductive adhesive 3.

[0035] Air outlet teeth 16 and air inlet teeth 17 are respectively provided on the front and rear sides of the outer casing 8. The air outlet teeth 16 and air inlet teeth 17 are located above the metal heat-conducting partition 12, and the air outlet teeth 16 and air inlet teeth 17 correspond one-to-one with the heat dissipation teeth 11 in the axial direction. This can form ventilation and remove the heat from the heat dissipation teeth 11.

[0036] An air outlet waveguide plate 18 is fixedly connected to the rear side of the main body 8, and the air outlet waveguide plate 18 corresponds to the horizontal height of the air outlet teeth 16. This allows hot air to be blown out, and raising the air outlet waveguide plate 18 can prevent the electromagnetic flux of the fan coil from leaking from the air outlet teeth 16.

[0037] A fan bracket 9 is fixedly connected to the front of the main body 8, and a fan 10 is fixedly connected to the front side of the fan bracket 9. The fan 10 is at the same horizontal height as the air intake tooth 17. This provides airflow for heat dissipation, forming active heat dissipation and improving heat dissipation efficiency.

[0038] An air inlet waveguide 7 is fixedly connected to the outside of the fan 10, and the air inlet waveguide 7 corresponds to the horizontal height of the fan 10. This can prevent the electromagnetic field of the fan coil from leaking out from the air inlet tooth 17.

[0039] A top cover plate 6 is fixedly connected to the upper part of the main body 8, and a fan cover plate 5 is fixedly connected to the outer side of the fan 10 and the air inlet waveguide 7. The top cover plate 6 can form an air duct within the air inlet teeth 17, heat dissipation teeth 11, and air outlet teeth 16 to enhance the heat dissipation effect. The top cover plate 6 and the fan cover plate 5 can also prevent dust from accumulating inside the equipment and affecting heat dissipation.

[0040] The implementation principle of the switching power supply housing with electromagnetic compatibility function of the present invention is as follows: During the operation of the equipment, the electronic components 4 are placed in a space covered by five metal surfaces, consisting of the housing body 8 and the metal heat-conducting partition 12. Then, conductive rubber 2 is placed in the heat-conducting rubber fixing groove 13, and the lower cover plate 1 is fixed by the connecting screw 14 to form a sealed space covered by six metal surfaces. Then, conductive rubber 2 is injected into the interior, which can transfer the heat generated by the electronic components to the heat dissipation teeth 11 above the metal heat-conducting partition 12. Under the power of the fan 10, the air flows from the air inlet waveguide 7 and the air inlet teeth 17, through the heat dissipation teeth 11, and carries away the heat. After passing through the air outlet teeth 16 and the air outlet waveguide plate 18, the heat is blown out. The integrated design of the heat dissipation teeth 11, the metal heat-conducting partition 12 and the housing body 8 effectively improves the heat conduction efficiency, avoids electromagnetic leakage from the housing gaps, blocks external electromagnetic interference, and prevents electromagnetic leakage from the fan coil by setting the air inlet waveguide 7 and the air outlet waveguide plate 18, thus meeting the requirements for use in occasions with certain requirements for electromagnetic compatibility.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A switching power supply housing with electromagnetic compatibility function, comprising a switching power supply housing, wherein the switching power supply housing includes an electronic device heat dissipation structure, a main device heat dissipation structure, a main electromagnetic wave leakage sealing structure, and a fan electromagnetic leakage prevention structure, wherein the electronic device heat dissipation structure includes a housing body (8), heat dissipation teeth (11), and thermally conductive adhesive (3), wherein the main device heat dissipation structure includes a metal thermally conductive partition (12), heat dissipation teeth (11), exhaust teeth (16), inlet teeth (17), and a fan (10), wherein the main electromagnetic wave leakage sealing structure includes a housing body (8), a metal thermally conductive partition (12), conductive rubber (2), and a lower cover plate (1), wherein the fan electromagnetic leakage prevention structure includes an inlet waveguide (7) and an outlet waveguide plate (18).

2. The casing of a switching power supply with electromagnetic compatibility function as described in claim 1, characterized in that: A metal heat-conducting baffle (12) is fixedly connected in the middle of the outer shell body (8). Below the metal heat-conducting baffle (12), a six-sided metal-covered sealed space is formed between the outer shell body (8), the metal heat-conducting baffle (12) and the lower cover plate (1).

3. The switching power supply housing with electromagnetic compatibility function as described in claim 1, characterized in that: An outer edge fixing bracket (15) is welded to the lower outer edge of the outer shell body (8). A heat-conducting rubber fixing groove (13) is provided at the bottom of the outer edge fixing bracket (15). A conductive rubber (2) is placed inside the heat-conducting rubber fixing groove (13). The lower part of the heat-conducting rubber fixing groove (13) is fixedly connected to the lower cover plate (1) by a connecting screw (14).

4. The switching power supply housing with electromagnetic compatibility function as described in claim 1, characterized in that: The outer shell (8), the metal thermally conductive partition (12) and the lower cover plate (1) form a six-sided metal-covered sealed space, and electronic devices (4) are placed inside the six-sided metal-covered sealed space. Thermally conductive adhesive (3) is poured into the six-sided metal-covered sealed space.

5. The casing of a switching power supply with electromagnetic compatibility function as described in claim 1, characterized in that: The metal thermally conductive partition (12) is fixedly connected to a uniformly distributed heat dissipation tooth (11).

6. The switching power supply housing with electromagnetic compatibility function as described in claim 1, characterized in that: The outer shell body (8) has air outlet teeth (16) and air inlet teeth (17) on its front and rear sides respectively. The air outlet teeth (16) and air inlet teeth (17) are located above the metal heat-conducting partition (12). The air outlet teeth (16), air inlet teeth (17) and heat dissipation teeth (11) are axially corresponding one-to-one.

7. The switching power supply housing with electromagnetic compatibility function as described in claim 1, characterized in that: An air outlet waveguide plate (18) is fixedly connected to the rear side of the outer shell body (8), and the air outlet waveguide plate (18) corresponds to the horizontal height of the air outlet tooth (16).

8. The casing of a switching power supply with electromagnetic compatibility function as described in claim 1, characterized in that: A fan bracket (9) is fixedly connected to the front of the outer shell body (8), and a fan (10) is fixedly connected to the front side of the fan bracket (9). The fan (10) corresponds to the horizontal height of the air inlet tooth (17).

9. The casing of a switching power supply with electromagnetic compatibility function as described in claim 1, characterized in that: An air inlet waveguide (7) is fixedly connected to the outside of the fan (10), and the air inlet waveguide (7) corresponds to the horizontal height of the fan (10).

10. A switching power supply housing with electromagnetic compatibility function as described in claim 1, characterized in that: The upper cover plate (6) is fixedly connected to the upper part of the outer shell body (8), and the fan (10) and the outer side of the air inlet waveguide (7) are fixedly connected to the fan cover plate (5).

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