Electronic transformer with high-efficiency heat dissipation function

Abstract

This utility model discloses an electronic transformer with high-efficiency heat dissipation function, including a housing and an electronic transformer installed in the inner cavity of the housing. The housing has a pre-reserved U-shaped air duct inside, and an air inlet is opened at the top of the housing. An air-guiding component for accelerating the airflow speed in the U-shaped air duct is installed inside the air inlet. Mounting grooves are respectively opened on the inner walls of both sides of the housing. By reserving a U-shaped air duct inside the housing and installing an air-guiding component at the top air inlet, when the air-guiding component is activated, cold air flows in the U-shaped air duct and can exchange heat with the electronic transformer in all directions, quickly carrying away the heat. Compared with the traditional natural convection heat dissipation method, the heat dissipation efficiency is greatly improved. The heat exchange components installed in the mounting grooves on the inner walls of both sides of the housing further enhance the heat dissipation capacity. Heat is dissipated to the surrounding environment through air convection, further improving the overall heat dissipation effect.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation technology for electronic components, specifically to an electronic transformer with high-efficiency heat dissipation function. Background Technology

[0002] As a core component of power electronic equipment, electronic transformers are widely used in power conversion, voltage regulation and signal coupling. With the development of electronic equipment towards higher frequency, smaller size and higher power density, the power loss of electronic transformers has increased significantly, resulting in a sharp rise in their operating temperature.

[0003] Existing designs mostly rely on natural convection or simple PCB copper plating for heat dissipation, which severely limits heat dissipation efficiency. Therefore, we need to propose an electronic transformer with high-efficiency heat dissipation function. Utility Model Content

[0004] The purpose of this utility model is to provide an electronic transformer with high-efficiency heat dissipation function. By setting up a loop-shaped air duct, air intake component, heat exchange component, bracket and dustproof mesh plate, it achieves high-efficiency heat dissipation, structural stability, convenient installation and easy maintenance, ensuring stable operation of the electronic transformer and extending its service life, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An electronic transformer with high-efficiency heat dissipation function includes: a housing and an electronic transformer installed in the inner cavity of the housing;

[0007] The interior of the housing is provided with a loop-shaped air duct, and the top of the housing is provided with an air inlet. The air inlet is provided with an air-guiding component to accelerate the airflow speed in the loop-shaped air duct.

[0008] The inner walls on both sides of the housing are respectively provided with mounting grooves, and heat exchange components that are in contact with the electronic transformer are respectively arranged inside the two sets of mounting grooves.

[0009] Preferably, the air intake assembly includes a mounting shell, which is fixedly embedded inside the air inlet. Two sets of fans are fixedly installed on the inner wall of the mounting shell, and a dustproof mesh plate is detachably connected to the top of the two sets of fans.

[0010] Preferably, the inner wall of the mounting shell is provided with a slot adapted to the dustproof mesh plate, one side of the slot passes through the mounting shell, and the dustproof mesh plate is inserted into the inside of the slot.

[0011] Preferably, both the dustproof mesh and the mounting shell are fixedly connected to one side with protrusions, and positioning pins are inserted into the interior of the two sets of protrusions.

[0012] Preferably, the heat exchange component includes a heat exchange plate, which is fixedly embedded in the interior of the mounting groove. A plurality of heat dissipation fins are fixedly connected to one side of the heat exchange plate, and one end of the heat dissipation fins passes through a loop-shaped air duct and is placed on the outside of the housing.

[0013] Preferably, the side of the heat spreader away from the heat dissipation fins is attached to the electronic transformer via a thermally conductive silicone sheet.

[0014] Preferably, the bottom of the housing is provided with several sets of air outlets, and all sets of air outlets are connected to the interior of the return-type air duct.

[0015] Preferably, the bottom of the housing is fixedly connected to two sets of brackets, and the housing is mounted on the PCB board through the two sets of brackets.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This invention features a pre-reserved U-shaped air duct inside the housing and an air intake component at the top. When the air intake component is activated, cool air flows within the U-shaped air duct, enabling comprehensive heat exchange with the electronic transformer and rapidly removing heat. Compared to traditional natural convection cooling, this significantly improves heat dissipation efficiency. Furthermore, the heat exchange components installed in the mounting slots on both sides of the housing further enhance heat dissipation capabilities, dissipating heat to the surrounding environment through air convection and further improving the overall heat dissipation effect. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the housing of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the shell, the return air duct, and the heat exchange components of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the air intake component of this utility model.

[0022] In the diagram: 1. Housing; 2. Electronic transformer; 3. U-shaped air duct; 4. Air intake assembly; 401. Mounting shell; 402. Fan; 403. Dustproof mesh plate; 5. Mounting slot; 6. Heat exchange assembly; 601. Heat spreader plate; 602. Heat dissipation fins; 603. Thermal conductive silicone pad; 7. Slot; 8. Protrusion; 9. Air outlet; 10. Bracket. Detailed Implementation

[0023] 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.

[0024] Please see Figure 1-4 This utility model provides a technical solution:

[0025] An electronic transformer with high-efficiency heat dissipation function includes: a housing 1 and an electronic transformer 2 installed in the inner cavity of the housing 1; the housing 1 is made of aluminum alloy material with high thermal conductivity (thermal conductivity >180W / m·K), and the surface is anodized to form a dense oxide film, which improves corrosion resistance and reduces contact thermal resistance; the electronic transformer 2 is fixed to the positioning boss at the bottom of the housing 1 by screws, and a 0.5mm thick silicone shock-absorbing pad is added between the positioning boss and the electronic transformer 2 to effectively suppress the mechanical damage of the device caused by high-frequency vibration, and at the same time avoid poor contact caused by vibration.

[0026] The housing 1 has a pre-installed circular air duct 3, and an air inlet is located at the top of the housing 1. Inside the air inlet is a fan assembly 4 designed to accelerate the airflow within the circular air duct 3. By configuring the circular air duct 3 and the fan assembly 4, air can flow in a guided path within the housing and its velocity is increased, thereby enhancing the heat exchange efficiency between the air and the electronic transformer 2. Furthermore, the cross-section of the circular air duct 3 can be designed as a trapezoidal structure (wider at the top and narrower at the bottom), with the duct width gradually changing from 15mm at the air inlet to 8mm at the air outlet 9, utilizing the Venturi effect in fluid mechanics to increase the airflow velocity. The fan assembly 4 employs a parallel layout of dual axial flow fans, with fan speed controlled by PWM. At an ambient temperature of 25℃, when the temperature of the electronic transformer 2 reaches 60℃, the fan automatically increases its speed to 3000rpm, achieving a maximum forced convection airflow of 12CFM.

[0027] Mounting slots 5 are respectively provided on the inner walls of both sides of the housing 1. Heat exchange components 6, which are in close contact with the electronic transformer 2, are respectively installed inside the two sets of mounting slots 5. By setting the mounting slots 5 and the heat exchange components 6, the heat exchange components 6 can be stably installed and in close contact with the electronic transformer 2, achieving the effect of rapidly transferring heat from the electronic transformer 2. In specific implementation, the depth of the mounting slots 5 is consistent with the thickness of the heat spreader 601 in the heat exchange component 6, ensuring that the parallelism error between the surface of the heat spreader 601 and the outer shell of the electronic transformer 2 after assembly is ≤0.1mm. The heat spreader 601 adopts a sintered vacuum cavity structure, with deionized water as the internal working fluid, and the filling amount is controlled at 0.3g / cm³, achieving a heat flux density of 500W / cm² at an operating temperature of 85℃.

[0028] The air intake assembly 4 includes a mounting housing 401, which is fixedly embedded inside the air inlet. Two sets of fans 402 are fixedly installed on the inner wall of the mounting housing 401. A dustproof mesh plate 403 is detachably connected to the top of the two sets of fans 402. By setting up the mounting housing 401, the two sets of fans 402 and the detachable dustproof mesh plate 403, the fans 402 are stably installed and the air flow is accelerated, while dust is prevented from entering, thus achieving the effect of efficient air intake and keeping the air duct clean.

[0029] The inner wall of the mounting housing 401 has a slot 7 that matches the dustproof mesh plate 403. One side of the slot 7 passes through the mounting housing 401, and the dustproof mesh plate 403 is inserted into the slot 7. By providing a slot 7 that matches the dustproof mesh plate 403, the dustproof mesh plate 403 can be easily inserted and removed, achieving the effect of convenient installation and removal of the dustproof mesh plate 403. In actual assembly, the entrance of the slot 7 is designed with a 45° chamfer to guide the dustproof mesh plate 403 to be inserted smoothly.

[0030] Both the dustproof mesh plate 403 and the mounting shell 401 have protrusions 8 fixedly connected to one side, and positioning pins are inserted into the two sets of protrusions 8. By setting the protrusions 8 and positioning pins, the dustproof mesh plate 403 inserted into the slot 7 can be fixed, thus preventing the dustproof mesh plate 403 from loosening or falling off when the fan 402 is working. The positioning pins are made of stainless steel spring pins with a diameter of 3mm, with an insertion force ≤10N and a pull-out force ≥30N, ensuring both ease of assembly and reliability requirements under vibration conditions; the surface of the protrusions 8 is polished, with a roughness Ra≤0.8μm, reducing wear after long-term use.

[0031] The heat exchange assembly 6 includes a heat spreader 601, which is fixedly embedded inside the mounting groove 5. Several sets of heat dissipation fins 602 are fixedly connected to one side of the heat spreader 601. One end of each heat dissipation fin 602 passes through the loop-shaped air duct 3 and is positioned on the outside of the housing 1. By setting up the heat spreader 601 and the heat dissipation fins 602 that pass through the loop-shaped air duct 3 to the outside of the housing 1, uniform heat distribution and rapid heat dissipation are achieved, increasing the heat dissipation area and improving heat dissipation efficiency. Specifically, the heat dissipation fins 602 are made of 6063 aluminum alloy through extrusion, with a fin thickness of 0.3 mm, a spacing of 2 mm, and a single fin heat dissipation area of ​​0.02 m². The fin surface is chemically polished and then coated with a black nano-ceramic coating, increasing the emissivity to 0.95 and significantly enhancing the radiative heat dissipation capacity.

[0032] The side of the heat spreader 601 furthest from the heat sink 602 is attached to the electronic transformer 2 via a thermally conductive silicone pad 603. By using the thermally conductive silicone pad 603, the contact thermal resistance between the heat spreader 601 and the electronic transformer 2 is reduced, achieving a more efficient transfer of heat from the electronic transformer 2 to the heat spreader 601. The thermally conductive silicone pad 603 is a silicon-based thermally conductive pad with a thermal conductivity of 3.0 W / m·K, a thickness of 1.0 mm, a compression ratio controlled between 30% and 50%, and maintains elasticity within a temperature range of -40℃ to 150℃, avoiding contact gaps caused by thermal expansion and contraction.

[0033] The bottom of the housing 1 has several sets of air outlets 9, all of which are connected to the interior of the return air duct 3. By providing air outlets 9 connected to the return air duct 3, a channel for hot air to be discharged from the return air duct 3 is provided, thus ensuring smooth air circulation and promoting heat dissipation.

[0034] Two sets of brackets 10 are fixedly connected to the bottom of the housing 1, and the housing 1 is mounted on the PCB board via the two sets of brackets 10. By setting two sets of brackets 10, the housing 1 can be stably mounted on the PCB board, thus ensuring the overall installation stability of the electronic transformer 2. The brackets 10 are made of glass fiber reinforced PA66 material, which is heat resistant to 150℃, and are connected to the PCB board by SMT surface mount soldering; the height of the brackets 10 is designed to be 5mm to ensure that there is sufficient space between the bottom of the housing 1 and the PCB board, which facilitates the airflow from the vent 9.

[0035] Working Principle: When the electronic transformer 2 is working, the heat generated by the electronic transformer 2 is first transferred to the heat spreader 601 through the thermally conductive silicone pad 603. The heat spreader 601 utilizes the phase change cycle of the internal working fluid to quickly disperse the heat throughout the entire plate. The heat dissipation fins 602 conduct the heat from the heat spreader 601 to the return air duct 3. At this time, the dual axial flow fan 402 of the air intake assembly 4 starts, and external cold air is drawn in from the top air inlet, filtered by the dust filter 403, and enters the return air duct 3. The airflow accelerates in the trapezoidal flow channel, undergoing forced convection heat exchange with the heat dissipation fins 602. Finally, the hot air is discharged from the bottom air outlet 9, forming a complete heat dissipation cycle. The dust filter 403 can be quickly installed and removed through the slot 7 and positioning pin, facilitating regular cleaning and maintenance and ensuring long-term heat dissipation performance.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electronic transformer with high-efficiency heat dissipation function, characterized in that, include: Housing (1) and electronic transformer (2) installed in the cavity of housing (1); The housing (1) has a pre-reserved return air duct (3) inside, and an air inlet is provided on the top of the housing (1). An air inlet is provided inside the air inlet to accelerate the air flow rate in the return air duct (3). The inner walls on both sides of the housing (1) are respectively provided with mounting grooves (5), and the interiors of the two sets of mounting grooves (5) are respectively provided with heat exchange components (6) that are in contact with the electronic transformer (2).

2. An electronic transformer with high-efficiency heat dissipation function according to claim 1, characterized in that: The air intake assembly (4) includes a mounting shell (401), which is fixedly embedded inside the air inlet. Two sets of fans (402) are fixedly installed on the inner wall of the mounting shell (401). A dustproof mesh plate (403) is detachably connected to the top of the two sets of fans (402) of the mounting shell (401).

3. The electronic transformer with high efficiency heat dissipation function according to claim 2, characterized in that: The inner wall of the mounting shell (401) is provided with a slot (7) that is compatible with the dustproof mesh plate (403). One side of the slot (7) passes through the mounting shell (401), and the dustproof mesh plate (403) is inserted into the inside of the slot (7).

4. The electronic transformer with high efficiency heat dissipation function according to claim 3, characterized in that: Both the dustproof mesh plate (403) and the mounting shell (401) are fixedly connected to one side of a protrusion (8), and positioning pins are inserted into the interior of the two sets of protrusions (8).

5. The electronic transformer with high efficiency heat dissipation function according to claim 1, characterized in that: The heat exchange component (6) includes a heat exchange plate (601), which is fixedly embedded in the inside of the mounting groove (5). A number of heat dissipation fins (602) are fixedly connected to one side of the heat exchange plate (601), and one end of the heat dissipation fins (602) passes through the loop air duct (3) and is placed on the outside of the housing (1).

6. The electronic transformer with high efficiency heat dissipation function according to claim 5, characterized in that: The heat spreader (601) is attached to the electronic transformer (2) on the side away from the heat dissipation fins (602) via a thermally conductive silicone sheet (603).

7. The electronic transformer with high efficiency heat dissipation function according to claim 1, characterized in that: The bottom of the housing (1) is provided with several sets of air outlets (9), and the several sets of air outlets (9) are all connected to the interior of the return air duct (3).

8. The electronic transformer with high efficiency heat dissipation function according to claim 1, characterized in that: The bottom of the housing (1) is fixedly connected to two sets of brackets (10), and the housing (1) is mounted on the PCB board through the two sets of brackets (10).

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