Anti-interference device for high-frequency radio-frequency power supply fan

Abstract

The utility model discloses an anti-interference device for a high-frequency radio-frequency power supply fan, and belongs to the technical field of radio-frequency power supplies. Wherein the metal shielding cover is installed on the periphery of the fan, the metal shielding cover is composed of a shielding plate and at least one baffle, the shielding plate is located above the air outlet face of the fan, a plurality of heat dissipation holes are formed in the surface of the shielding plate, and threaded holes are formed in the four corners of the shielding plate; the baffle is vertically and fixedly connected with the side edge of the shielding plate, and a heat dissipation space is formed among the baffle, the shielding plate and the fan. The metal shielding cover is installed on the air outlet face of the fan, electromagnetic interference generated when the fan works is restrained, meanwhile, an external interference power supply is shielded, and stable operation of power supply equipment in a high-power radio frequency environment is guaranteed. The periphery of the metal shielding cover is tightly attached to the surface of an equipment sheet metal part through threaded connection, the protection effect is achieved, bolts and other foreign matter are prevented from being scattered in the fan in the equipment mounting and dismounting process, and abnormal starting of the fan is avoided. The utility model has the advantages of simple structure and high cost performance.

Description

Technical Field

[0001] This utility model belongs to the field of radio frequency power supply technology, and specifically relates to an anti-interference device for a high-frequency radio frequency power supply fan. Background Technology

[0002] In radio frequency (RF) power supply systems, fan cooling is a crucial element in ensuring stable equipment operation. As RF power supplies evolve towards higher frequencies and higher power, the heat dissipation requirements for internal components have increased significantly. Currently, air cooling is commonly used to maintain the temperature of power amplifiers (PAs), power modules, and other critical components within safe ranges. However, in high-frequency, high-power operating environments, the fans inside RF power supplies are susceptible to interference from radio frequency signals. In particular, the high-power RF signals generated by the intermediate layer PA can cause electromagnetic interference (EMI) to the fan's control or drive circuitry, thus affecting the fan's normal operation.

[0003] Specifically, when the RF power supply is operating at high frequency power output, the RF signal generated by the intermediate layer PA can couple to the fan control circuit, causing abnormal fan drive signals, resulting in false alarms or even fan shutdown. In this situation, the RF power supply's heat dissipation capacity decreases, and the internal temperature rises rapidly, triggering the power amplifier's thermal protection mechanism. This causes the overall power output to drop rapidly, even to zero, failing to meet the system's set power output target. This not only affects the stability of the RF power supply but can also severely impact the normal operation of the entire RF system.

[0004] Therefore, effectively reducing the impact of radio frequency interference on fan drive systems and improving the stability of radio frequency power supplies under high-frequency and high-power operation has become an important technical challenge in current radio frequency power supply design. Utility Model Content

[0005] The purpose of this invention is to provide an anti-interference device for a high-frequency radio frequency power supply fan, which solves the problem that the fan activates the thermal protection mechanism due to false alarms when the radio frequency power supply is outputting at high frequency, thus causing the overall power to drop.

[0006] To solve the above problems, the present invention adopts the following technical solution:

[0007] An anti-interference device for a high-frequency radio frequency power supply fan includes a metal shielding cover installed on the outer periphery of the fan. The metal shielding cover consists of a shielding plate and at least one baffle plate, wherein:

[0008] The shielding plate is located above the fan exhaust surface and has several heat dissipation holes on its surface. Threaded holes are provided at the four corners of the shielding plate.

[0009] The baffle is fixedly connected with the side edge of the shielding plate perpendicularly, and forms a heat dissipation space between the shielding plate and the fan.

[0010] In a further embodiment, the central part of the shielding plate is a closed part, and the heat dissipation holes are evenly distributed around the outer periphery of the closed part.

[0011] By the above technical solution, the fan can improve the heat dissipation efficiency and ensure the normal operation of the equipment in a high-frequency power radio frequency environment.

[0012] In a further embodiment, the closed part and the heat dissipation holes are regular polygons or circles.

[0013] By the above technical solution, the efficiency of air flow can be maximized, and the stability of the shielding plate structure is increased.

[0014] In a further embodiment, four gaskets are further included, and the gaskets are located below the threaded holes and are provided with through holes corresponding to the threaded holes.

[0015] The gaskets are connected to the side of the baffle away from the shielding plate.

[0016] By the above technical solution, the metal shielding cover can be fixed to the outer periphery of the fan by screws, and the gaskets prevent loosening at the connection between the two.

[0017] Beneficial effects: By installing the metal shielding cover on the air outlet surface of the fan, electromagnetic interference generated during the operation of the fan is suppressed, external interference power is shielded, and stable operation of the power supply equipment in a high-power radio frequency environment is ensured. In addition, the metal shielding cover is tightly connected to the surface of the device sheet metal part through threaded connection around the metal shielding cover, which plays a protective role, prevents foreign matters such as bolts from scattering in the fan during installation and disassembly, avoids abnormal start of the fan, and the utility model has the advantages of simple structure and high cost performance. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 FIG. 1 is a structural schematic diagram of an embodiment 1 of the utility model;

[0019] Fig. 2 FIG. 2 is a structural schematic diagram of an embodiment 2 of the utility model.

[0020] Reference signs: 10, metal shielding cover;

[0021] 1, shielding plate; 11, closed part; 12, heat dissipation hole; 13, threaded hole;

[0022] 2, baffle;

[0023] 3, gasket; 31, through hole. DETAILED DESCRIPTION

[0024] 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.

[0025] This application addresses the problem of power drop in a high-frequency RF power supply caused by fan alarms during high-frequency, high-power output. It proposes an anti-interference device for the fan of a high-frequency RF power supply, hereinafter referred to as "the device". Figs. 1-2 As shown, the device includes a metal shielding cover installed on the outer periphery of the fan. The metal shielding cover consists of a shielding plate 1 and at least one baffle 2. The shielding plate 1 is located above the air outlet surface of the fan and has several heat dissipation holes 12 on its surface. Threaded holes 13 are provided at the four corners of the shielding plate 1. The baffle 2 is vertically fixed to the side of the shielding plate 1 and forms a heat dissipation space between the baffle 2, the shielding plate 1, and the fan.

[0026] Specifically, the shielding plate 1 has a closed part 11 in the center, and heat dissipation holes 12 are evenly distributed around the outer periphery of the closed part 11. The closed part 11 and the heat dissipation holes 12 are regular polygons or circles, which increases the stability of the shielding plate 1 structure while ensuring that the fan can dissipate heat efficiently.

[0027] This device can be installed on the air outlet of the fan by inserting a bolt through the threaded hole 13 and engaging with a nut to fit tightly against the surface of the sheet metal part of the equipment. It shields the radio frequency interference brought by the intermediate PA layer inside the radio frequency power supply. At the same time, it plays a protective role during the disassembly and assembly of the equipment, preventing foreign objects from falling into the fan and thus avoiding the risk of abnormal fan start-up.

[0028] Example 1, see Fig. 1 Each of the three sides of the shielding plate 1 is connected to a baffle 2, and a pad 3 is installed on the side of the baffle 2 away from the shielding plate 1. The pad 3 is located below the threaded hole 13 and has a through hole 31 that mates with the threaded hole 13. The pad 3 increases the stability of the connection between the metal shielding cover and the sheet metal parts at the fan outlet and prevents the bolts from loosening.

[0029] Example 2, see Fig. 2 A baffle 2 is connected to one side of the shielding plate 1, and the side of the baffle 2 away from the shielding plate 1 extends into the heat dissipation space formed between the device and the fan, so that the device fits more closely to the sheet metal parts at the fan outlet.

[0030] Compared with the prior art, this application has the following advantages:

[0031] (1) Anti-interference enhancement: through the design of metal shield, the electromagnetic interference generated by the fan during work is inhibited, and external interference sources are shielded, ensuring the stable operation of the power supply device in a high-frequency radio frequency environment.

[0032] (2) Improved heat dissipation performance: the design of the heat dissipation hole 12 allows heat to be quickly discharged when the fan is working, keeping the device temperature within a safe range and avoiding device failure due to overheating.

[0033] (3) Stable structure: the design of the gasket 3 strengthens the connection between the metal shield and the sheet metal part at the fan outlet, ensuring the stability of the device and avoiding loosening or damage due to vibration and other factors during use.

[0034] (4) Simple structure and low cost: compared with the traditional fan power supply end with magnetic ring anti-interference, the single block has higher cost performance, and the structure is simple, easy to disassemble and replace.

[0035] The above content is a detailed description of the present application combined with specific embodiments, and cannot be considered as limiting the specific implementation of the present application to these descriptions. For those skilled in the art to which the present application belongs, without departing from the concept of the present application, a number of simple deductions or substitutions can be made, which should be considered as falling within the scope of protection of the present application.

Claims

1. An anti-interference device for high-frequency radio frequency power supply fan, characterized in that it comprises: a metal shielding cover installed on the outer periphery of the fan, which is composed of a shielding plate (1) and at least one baffle (2), wherein: the shielding plate (1) is located above the air outlet surface of the fan, and a plurality of heat dissipation holes (12) are formed on the surface of the shielding plate (1), and threaded holes (13) are formed on the four corners of the shielding plate (1); the baffle (2) is fixedly connected with the side of the shielding plate (1) perpendicularly, and forms a heat dissipation space between the shielding plate (1) and the fan. the central part of the shielding plate (1) is a closed part (11), and the heat dissipation holes (12) are evenly distributed around the outer periphery of the closed part (11). the closed part (11) and the heat dissipation holes (12) are regular polygons or circles. It also comprises four gaskets (3), which are located below the threaded holes (13) and have through holes (31) corresponding to the threaded holes (13); 2. The anti-interference device for high-frequency radio frequency power supply fan according to claim 1, characterized in that: the gaskets (3) are connected to the side of the baffle (2) away from the shielding plate (1).

3. The anti-interference device for high-frequency radio frequency power supply fan according to claim 2, characterized in that: ​ 4. The anti-interference device for high-frequency radio frequency power supply fan according to claim 1, characterized in that: ​ ​

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