Active cooling linear power supply

Abstract

The utility model relates to linear power supply technical field discloses the linear power supply of active heat dissipation formula, include: main body, the inside below of main body is equipped with the circuit board, the outside of circuit board is equipped with active heat dissipation unit, is equipped with auxiliary unit in active heat dissipation unit. That linear power supply of active heat dissipation formula, through the cooperation between main body, circuit board and active heat dissipation unit, the heat that its inside voltage stabilizing element and rectifier diode etc. produce in main body 1 operating process, lead to circuit board 2 and main body 1 inside temperature rise, at this moment, part of heat will be transferred to the heat conduction plate 3, since the heat conduction plate 3 and bolt 5 all have good heat conductivity, and bolt 5 part is communicated with the outside through the through -hole 8, the heat conduction plate 3 will heat be transferred to bolt 5, thereby can export the heat in main body 1 interior to the outside, make main body 1 have certain active heat dissipation effect, the linear power supply is in the high -quality operation state with convenience.

Description

Technical Field

[0001] This utility model relates to the field of linear power supply technology, specifically to an active heat dissipation linear power supply. Background Technology

[0002] A linear power supply is a device that converts alternating current (AC) to direct current (DC). Its core characteristic lies in stabilizing the output voltage through linear regulation elements (such as transistors or field-effect transistors), making its operating principle relatively simple and direct. The application of linear power supplies in the audio field stems from their extremely low noise, ripple, and excellent transient response; these characteristics directly determine the purity and dynamic performance of the audio signal. Although linear power supplies have disadvantages in efficiency, size, and cost, their advantages are irreplaceable in Hi-Fi and high-end audio systems that pursue ultimate sound quality.

[0003] The heat generated during the operation of a linear power supply is mainly concentrated in its internal key components. These components generate heat during energy conversion and current flow. Among them, the regulating transistor, as the core voltage regulator of the linear power supply, stabilizes the output voltage by adjusting the voltage drop. When the difference between the input and output voltages is large, the regulating transistor must withstand high voltage and bear the entire load current, resulting in significant power loss. In the rectifier circuit, the diode converts alternating current into pulsating direct current. The product of its forward voltage drop (typically 0.7V-1.2V) and the load current generates heat loss. Most of this heat is transferred to the circuit board of the linear power supply.

[0004] Currently, most linear power supplies on the market, such as the two linear power supplies from Foshan Bada Audio and the FiiO PL50 linear power supply, do not have ventilation holes on the surface of the casing to prevent external dust and impurities from entering the casing. This results in very poor active heat dissipation performance of the linear power supply, making it difficult for the linear power supply to operate at its best. Utility Model Content

[0005] The purpose of this invention is to provide an actively cooled linear power supply with a certain degree of active heat dissipation, which facilitates the linear power supply to operate in a high-quality state, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an active heat dissipation linear power supply, comprising: a main body, a circuit board mounted on the lower part of the main body, an active heat dissipation unit provided on the outer side of the circuit board, and an auxiliary unit provided in the active heat dissipation unit.

[0007] Preferably, the active heat dissipation unit includes: a heat-conducting plate, the circuit board having a double-layer structure, a heat-conducting plate being provided between the two layers of the circuit board, multiple through slots being provided on the outer side of the upper surface of the heat-conducting plate, bolts being provided inside the through slots, a threaded cylinder being threadedly connected to the outer wall of the bolts, the threaded cylinder being fixedly connected to the main body, an anti-slip block being fitted under the outer wall of the bolts, the anti-slip block being pressed against the main body, and multiple through holes being provided on the outer wall of the anti-slip block.

[0008] Preferably, a ring is fitted onto the bottom of the outer wall of the bolt, and the ring abuts against the anti-slip block.

[0009] Preferably, the anti-slip block has a plurality of heat-conducting particles uniformly arranged inside.

[0010] Preferably, the auxiliary unit includes: a threaded post, which is threadedly connected to the upper part of the outer wall of the bolt, and a plurality of elastic plates are fixedly connected to the outer wall of the threaded post, the elastic plates abutting against the inner wall of the through groove.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This active cooling linear power supply has the following advantages over traditional technology:

[0012] Through the cooperation between the main body, circuit board and active heat dissipation unit, during the operation of the main body, the internal voltage regulator and rectifier diodes generate heat, which causes the temperature of the circuit board and the inside of the main body to rise. At this time, some of the heat will be transferred to the heat conduction plate. Since both the heat conduction plate and the bolts have good thermal conductivity, and the bolts are connected to the outside through the through holes, the heat conduction plate transfers heat to the bolts, thereby dissipating the heat inside the main body to the outside. This gives the main body a certain degree of active heat dissipation effect, which helps the linear power supply to be in a high-quality operating state.

[0013] Through the cooperation between the main body, circuit board, active heat dissipation unit and auxiliary unit, the top of the bolt is threaded to the elastic plate on the outside of the threaded column. The elastic plate has elastic deformation capability. When the bolt is threaded to the threaded cylinder and the anti-slider is installed at the bottom of the main body, the elastic plate will fully fit with the heat conduction plate, so that the heat in the heat conduction plate can be smoothly transferred to the bolt and discharged to the outside through the through hole. Attached Figure Description

[0014] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2for Figure 1 A partial sectional view from the side;

[0017] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0018] Figure 4 for Figure 2 Enlarged view of point B in the middle;

[0019] Figure 5 for Figure 2 A partial sectional view of the bolt, threaded cylinder, and threaded post.

[0020] In the diagram: 1. Main body, 2. Circuit board, 3. Heat-conducting plate, 4. Through groove, 5. Bolt, 6. Threaded cylinder, 7. Anti-slip block, 8. Through hole, 9. Ring, 10. Threaded column, 11. Elastic sheet. 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 Figures 1-5 The present invention provides a technical solution: an active heat dissipation linear power supply, comprising: a main body 1, a circuit board 2 installed inside the lower part of the main body 1, an active heat dissipation unit provided on the outer side of the circuit board 2, and an auxiliary unit provided in the active heat dissipation unit.

[0023] In the specific implementation process, it is worth noting that the main body 1 is the linear power supply body, the circuit board 2 is one of the necessary components for the operation of the linear power supply body, and the surface of the circuit board 2 is equipped with multiple electronic components required for the operation of the main body 1. The active heat dissipation unit can realize active heat dissipation during the operation of the main body 1, and the auxiliary unit can facilitate the active heat dissipation unit to smoothly carry out active heat dissipation to the outside.

[0024] Furthermore, the active heat dissipation unit includes: a heat-conducting plate 3, a circuit board 2 with a double-layer structure, a heat-conducting plate 3 between the double-layer circuit board 2, a plurality of through slots 4 on the outer side of the upper surface of the heat-conducting plate 3, a bolt 5 inside the through slot 4, a threaded cylinder 6 threadedly connected to the outer wall of the bolt 5, the threaded cylinder 6 being fixedly connected to the main body 1, an anti-slip block 7 fitted under the outer wall of the bolt 5, the anti-slip block 7 abutting against the main body 1, and a plurality of through holes 8 on the outer wall of the anti-slip block 7.

[0025] In the specific implementation process, it is worth noting that the heat-conducting plate 3 is an aluminum nitride ceramic plate, which is a material with both high thermal conductivity and electrical insulation. While having excellent thermal conductivity, it will not affect the normal operation of the electronic components on the original circuit board 2 due to electrical conductivity. The bolt 5 is made of metal copper, which has excellent thermal conductivity. The anti-slip block 7 is made of rubber, which has a certain degree of flexibility. After the main body 1 is placed, the anti-slip block 7 will contact the placement base surface, which can improve the stability of the main body 1 after placement. The through hole 8 allows the bolt 5 part to directly contact the outside.

[0026] Furthermore, a ring 9 is fitted onto the bottom of the outer wall of the bolt 5, and the ring 9 abuts against the anti-slip block 7.

[0027] In the specific implementation process, it is worth noting that the tight contact between the ring 9 and the anti-slip block 7 can increase the tightness of the bolt 5 against the anti-slip block 7, making it easier to install the anti-slip block 7 stably.

[0028] Furthermore, the anti-slip block 7 has multiple heat-conducting particles evenly distributed inside.

[0029] In the specific implementation process, it is worth noting that the heat-conducting particles are metallic copper powder. Copper has an extremely high thermal conductivity (approximately 401 W / (m·K)). Adding it to rubber can significantly improve the thermal conductivity of the rubber. The method for placing the heat-conducting particles inside the anti-slip block 7 can be a mechanical blending method. The heat-conducting particles and raw rubber are mechanically mixed in equipment such as open mills and internal mixers. Through the action of shear force and friction, the heat-conducting particles are evenly dispersed in the rubber matrix. First, the raw rubber is added to an open mill or internal mixer for plasticizing to give it a certain degree of plasticity. Then, gradually add the heat-conducting particles while adjusting the equipment's speed, temperature, and other parameters to ensure that the heat-conducting particles are evenly dispersed. For example, when preparing heat-conducting rubber with added alumina particles, first plasticize the raw rubber in a mixer at 80-100℃ for 5-10 minutes, then add alumina particles in batches and continue mixing for 20-30 minutes to evenly disperse the alumina particles in the rubber. This can give the anti-slip block 7 certain thermal conductivity, which can improve the active heat dissipation effect of the main body 1. The above-described implementation method is only for ease of understanding and implementation and is not a protection of the processing method.

[0030] Furthermore, the auxiliary unit includes a threaded post 10, which is threadedly connected to the outer wall of the bolt 5. Multiple elastic plates 11 are fixed to the outer wall of the threaded post 10, and the elastic plates 11 abut against the inner wall of the through groove 4.

[0031] In the specific implementation process, it is worth noting that the threaded column 10 and the elastic plate 11 are made of the same material as the bolt 5 and have excellent thermal conductivity. The elastic plate 11 has elastic deformation capability. When the bolt 5 is threadedly connected to the threaded cylinder 6 and the anti-slip block 7 is installed at the bottom of the main body 1, the elastic plate 11 will fully fit with the heat-conducting plate 3.

[0032] Working principle:

[0033] Installation of the active cooling unit and auxiliary unit with the main body:

[0034] First, place multiple anti-slip blocks at the bottom of multiple threaded cylinders 6. Then, thread bolts 5 through the corresponding holes on the anti-slip blocks 7 and the main body 1, connecting the bolts 5 to the threaded cylinders 6 and tightening them against the anti-slip blocks 7. Next, thread the threaded post 10 to the bolts 5. Then, fit the heat-conducting plate 3 onto the outside of the threaded post 10. At this point, multiple elastic plates 11 will abut against the inner wall of the through groove 4. Finally, use screws to install the circuit board 2 at the bottom of the inner part of the main body 1, thus completing the installation of the active heat dissipation unit and auxiliary unit with the main body.

[0035] Active heat dissipation of the machine body:

[0036] During operation, the internal voltage regulator and rectifier diodes of the main body 1 generate heat, causing the temperature of the circuit board 2 and the inside of the main body 1 to rise. At this time, some of the heat will be transferred to the heat conduction plate 3. Since the heat conduction plate 3, the elastic sheet 11, the threaded column 10 and the bolt 5 all have good thermal conductivity, and the bolt 5 is partially connected to the outside through the through hole 8, the heat conduction plate 3 transfers heat to the bolt 5, thereby dissipating the heat inside the main body 1 to the outside, so that the main body 1 has a certain active heat dissipation effect, which makes it easier for the linear power supply to be in a high-quality operating state.

[0037] 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 actively cooled linear power supply comprising: The main body (1) is characterized in that: a circuit board (2) is installed inside the lower part of the main body (1), an active heat dissipation unit is provided on the outside of the circuit board (2), and an auxiliary unit is provided in the active heat dissipation unit.

2. The actively heat-dissipating linear power supply according to claim 1, characterized in that: The active heat dissipation unit includes: a heat-conducting plate (3), the circuit board (2) is a double-layer structure, the heat-conducting plate (3) is provided between the two layers of the circuit board (2), the upper surface of the heat-conducting plate (3) is provided with multiple through slots (4), the inside of the through slots (4) is provided with bolts (5), the outer wall of the bolts (5) is threadedly connected to a threaded cylinder (6), the threaded cylinder (6) is fixedly connected to the main body (1), the lower part of the outer wall of the bolts (5) is fitted with an anti-sliding block (7), the anti-sliding block (7) is pressed against the main body (1), and the outer wall of the anti-sliding block (7) is provided with multiple through holes (8).

3. The actively cooled linear power supply of claim 2, wherein: A ring (9) is fitted on the bottom of the outer wall of the bolt (5), and the ring (9) abuts against the anti-slip block (7).

4. The active cooling linear power supply according to claim 2, characterized in that: The anti-slip block (7) has multiple heat-conducting particles uniformly arranged inside.

5. The actively cooled linear power supply of claim 1, wherein: The auxiliary unit includes a threaded post (10), which is threadedly connected to the outer wall of the bolt (5). The outer wall of the threaded post (10) is fixed with a plurality of elastic plates (11), which abut against the inner wall of the through groove (4).

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