Heat dissipation auxiliary device for short-wave amplitude modulation broadcast transmitter

Abstract

The invention relates to a heat dissipation auxiliary device for a short-wave amplitude modulation broadcast transmitter, and belongs to the technical field of transmission equipment. The heat dissipation auxiliary device for the short-wave amplitude modulation broadcast transmitter comprises a baffle plate, a steering piece and a pair of connecting pieces, the baffle plate is arranged opposite to the radiating surface of the transmitter; the pair of connecting pieces are oppositely arranged and connected between the baffle and the heat dissipation surface, so that the baffle, the heat dissipation surface and the pair of connecting pieces jointly define a flow guide cavity, and the heat dissipation opening is located in the flow guide cavity; the steering piece is hinged to the connecting piece and can rotate around the length direction of the transmitter; the bottom end of the baffle extends out of the transmitter, and the bottom end of the steering piece extends out of the baffle. The steering part is configured to be driven by airflow to rotate till the top end of the steering part is in lap joint with the baffle, so that the airflow facing the baffle is guided into the flow guide cavity, and the airflow facing the heat dissipation face is blocked. According to the heat dissipation auxiliary device for the short-wave amplitude modulation broadcast transmitter provided by the embodiment of the invention, dust can be prevented from entering the transmitter while efficient heat dissipation of the transmitter is realized.

Description

Technical Field

[0001] This application relates to the field of transmission equipment technology, and more specifically, to a heat dissipation auxiliary device for a shortwave amplitude modulation broadcast transmitter. Background Technology

[0002] Transmitters, especially large transmitters used in outdoor base stations, require high heat dissipation performance for stable operation. To this end, multiple heat dissipation vents are usually provided on the transmitter casing to dissipate the heat generated by the internal electronic components in a timely manner through natural air convection or forced air cooling.

[0003] However, this method of heat dissipation through airflow also makes it easy for external impurities such as dust, sand, and willow catkins to enter the transmitter through the vents. Long-term accumulation of these impurities inside can not only form a heat-insulating layer on the surface of the heat-generating components, severely hindering heat dissipation efficiency and causing the transmitter to overheat and degrade in performance or even be damaged, but it can also cause short circuits, ultimately affecting the transmitter's signal transmission quality and service life.

[0004] Currently, common protective measures, such as installing dust filters on heat dissipation vents, can provide some protection, but dust easily clogs the mesh, exacerbating poor heat dissipation. Furthermore, they require frequent manual cleaning and maintenance, resulting in high costs and limited effectiveness. In addition, while some simple baffle structures can block some dust falling in a straight line, their protective effect is not ideal against airflows and dust intrusion with complex directions, making it difficult to achieve long-term, adaptive, and effective dust prevention while ensuring efficient heat dissipation.

[0005] Therefore, there is an urgent need in the existing technology for a solution that can efficiently dissipate heat while actively preventing dust from entering the transmitter. Summary of the Invention

[0006] The purpose of this application is to provide a heat dissipation auxiliary device for a shortwave amplitude modulation broadcast transmitter, which can efficiently dissipate heat from the transmitter while preventing dust from entering the transmitter, thereby improving the aforementioned problems.

[0007] This application is achieved through the following technical solution: This application provides a heat dissipation auxiliary device for a shortwave amplitude modulation (AM) broadcast transmitter. The heat dissipation auxiliary device includes a baffle, a deflector, and a pair of connectors. The baffle is disposed opposite to the heat dissipation surface of the transmitter, which has a heat dissipation vent. The pair of connectors are disposed opposite to each other along the length of the transmitter and are connected between the baffle and the heat dissipation surface, so that the baffle, the heat dissipation surface, and the pair of connectors together form a flow guide cavity, and the heat dissipation vent is located in the flow guide cavity. The deflector is hinged to the pair of connectors and can rotate around the length of the transmitter. Along the height of the transmitter, the bottom end of the baffle extends beyond the transmitter, and the bottom end of the deflector extends beyond the baffle. The deflector is configured to be driven by airflow to rotate until its top end overlaps with the baffle, thereby guiding the airflow toward the baffle into the flow guide cavity and blocking the airflow toward the heat dissipation surface.

[0008] In the technical solution of this application embodiment, the cooperation between the deflector and the baffle ensures that external airflow can only enter the guide cavity through a controlled single inlet formed by the deflector and the baffle. This eliminates the possibility of airflow directly impacting the heat dissipation vent from other paths, thereby achieving airflow guidance control. The process of airflow impacting the baffle after entering the guide cavity separates the airflow from the dust, ensuring that the subsequent airflow acting on the heat dissipation surface is low-speed and low-pressure, mainly brushing over the heat dissipation vent surface for heat exchange, while also helping to prevent dust from entering. Wind forces from different directions are ultimately converted into positive pressure that strengthens the seal between the deflector and the baffle. The stronger the wind, the stronger the sealing pressure, the more stable the shape of the guide inlet, and the better the protective effect.

[0009] In some embodiments, the baffle is divided into a first segment and a second segment along the height direction of the transmitter; the first segment is closer to the steering component than the second segment; the distance between the first segment and the heat dissipation surface is smaller than the distance between the second segment and the heat dissipation surface.

[0010] In the technical solution of this application embodiment, the space enclosed by the heat dissipation surface and the first section inertially separates large dust particles in the airflow, while the space enclosed by the second section decelerates and settles small dust particles in the airflow. This effectively removes dust particles of different sizes from the airflow, improving dust prevention efficiency compared to a uniform cross-section guide cavity. The narrow-to-wide flow channel structure combines the benefits of forced convection and natural convection. The narrow channel in the first section increases the airflow velocity, enhancing the forced convection cooling effect; the spacious space in the second section is more conducive to the rise of hot air and natural convection, optimizing the overall heat dissipation efficiency. The narrow-to-wide flow channel design makes the airflow within the guide cavity more orderly and controllable. Under the action of gravity, the separated dust slides down the inner walls of the baffles in the first and second sections to the bottom for discharge, giving the entire cavity good self-cleaning ability and preventing internal dust accumulation.

[0011] In some embodiments, there is a smooth transition between the first and second segments.

[0012] In the technical solution of this application embodiment, the smooth transition structure avoids severe eddies and flow separation caused by abrupt changes in the flow channel cross-section. This not only reduces the loss of airflow kinetic energy and ensures efficient flow guidance and heat dissipation, but also reduces noise caused by airflow disturbance, which is particularly important for noise-sensitive applications. The smoothly connected flow channel allows the airflow to transition smoothly from a high-speed state to a low-speed state. It prevents settled dust from being re-entrained due to eddies, ensuring the dust removal effect of the secondary deceleration and settling process, and making the airflow organization within the entire guide cavity more stable and controllable. The smooth transition avoids stress concentration, enhances the structural strength and long-term reliability of the baffle at this critical connection point, and can better withstand wind load vibration and potential physical collisions.

[0013] In some embodiments, the rotation axis L1 of the steering component divides it into a third segment and a fourth segment, which are located on opposite sides of the rotation axis L1; the projection of the third segment onto the baffle extends beyond the baffle, while the projection of the fourth segment onto the baffle falls within the range of the baffle; and the distance from the rotation axis L1 to the free end of the third segment is less than the distance from the rotation axis L1 to the free end of the fourth segment.

[0014] In the technical solution of this application embodiment, the asymmetric lever design makes the steering component extremely sensitive to even weak airflow, enabling it to quickly respond to changes in wind direction and reach the working position, thus improving the adaptability of the device in environments with variable wind direction. The long lever arm ensures that sufficient contact pressure is maintained between the steering component and the baffle under strong wind conditions, preventing airflow from short-circuiting through gaps and ensuring the reliability of airflow guidance and sealing. This design balances the operating torque and the restoring torque. In windless or lightly windy conditions, the steering component naturally droops due to gravity; once there is wind, it can quickly move by overcoming gravity and friction thanks to the lever advantage.

[0015] In some embodiments, the weight of the third segment is greater than the weight of the fourth segment.

[0016] In the technical solution of this application embodiment, gravity is used to achieve the default open state of the steering component, ensuring that heat dissipation does not deteriorate under windless conditions. This recovery mechanism is completely passive, requires no additional energy, and is reliable. The heavier third segment acts as a counterweight, increasing the rotational inertia of the steering component, enabling it to resist brief, minor wind fluctuations and avoiding frequent shaking or oscillations near critical wind speeds, thereby improving the stability and service life of the device. In environments with vibration or instantaneous gusts, the additional weight provides a better damping effect, making the steering component's movement smoother and more decisive, reducing the possibility of malfunction.

[0017] In some embodiments, the third segment is further provided with a counterweight; the counterweight is positioned close to the rotation axis L1.

[0018] In the technical solution of this application embodiment, by setting a counterweight block to bring the center of gravity of the steering component closer to the rotation axis L1, the moment of inertia is reduced. This makes the steering component more responsive to changes in wind direction and force, enabling it to more quickly form or disengage from the baffle, thus improving the adaptability of the heat dissipation auxiliary device provided in variable wind fields. The center of gravity being closer to the axis makes the movement of the steering component more controllable during startup and reset, suppressing unnecessary oscillations or overshoot, and enhancing operational stability and reliability. As a module independent of the steering component body, the counterweight block allows for precise on-site calibration of the steering component's dynamic performance by adjusting its mass or installation position to achieve optimal operating conditions.

[0019] In some embodiments, the baffle is further provided with a closure member, which is hinged to the baffle and can rotate about the length of the transmitter; the deflector member is configured to be driven by airflow to rotate to the free end of the fourth segment to overlap with the closure member; the closure member is configured to be rotated to its top end to overlap with the heat dissipation surface when the thrust from the airflow and the deflector member reaches a threshold, so as to block the airflow from entering the guide cavity.

[0020] In the technical solution of this application embodiment, the heat dissipation auxiliary device for shortwave amplitude modulation broadcast transmitters prioritizes heat dissipation under normal conditions and automatically switches to a sealed protection mode under extreme wind and sand conditions, thereby improving the transmitter's survivability and reliability in harsh environments. The mode switching is passively triggered entirely by the environmental parameter of wind pressure, requiring no sensors, controllers, or external power sources. The trigger threshold is determined by the structure, weight, and articulated friction of the steering and sealing components, making the mechanism simple, reliable, and easy to maintain.

[0021] In some embodiments, the rotation axis L2 of the closure divides it into a fifth segment and a sixth segment located on both sides of the axis; the fourth segment can overlap with the fifth segment, and the free end of the sixth segment can overlap with the heat dissipation surface; the distance from the rotation axis L2 to the free end of the sixth segment is less than the distance from the rotation axis L2 to the free end of the fifth segment; the baffle and the free end of the sixth segment are respectively provided with mutually attractive magnet blocks.

[0022] In the technical solution of this application embodiment, the introduction of the magnet block sets a clear mechanical threshold for mode switching, ensuring that the device only activates the sealing mode when the wind pressure reaches the preset protection threshold, thereby improving the system's anti-interference capability and operational reliability. This design makes the activation process of the sealing component non-linear; once triggered, the resistance drops sharply, and the sealing component can quickly pass through the intermediate stroke and instantly complete the closing action, shortening the exposure time under harsh conditions.

[0023] In some embodiments, a plurality of guide plates are also included, disposed in the guide cavity, spaced apart along the length direction of the transmitter, and connected to the heat dissipation surface and the baffle; in the length direction of the transmitter, the edge of the heat dissipation port extends beyond any of the guide plates.

[0024] In the technical solution of this application embodiment, the guide plate eliminates dead zones or low-speed zones that may exist on the heat dissipation surface, forcing airflow to more evenly scour all heat dissipation vents, avoiding localized overheating and improving overall heat dissipation efficiency. The guide plate, connected between the heat dissipation surface and the baffle, acts like a rib or support, enhancing the mechanical strength and rigidity of the entire guide cavity assembly, making it more able to withstand wind loads and vibrations, and improving the stability and lifespan of the device. The orderly airflow organization reduces flow losses, allowing more effective airflow to participate in heat dissipation under the same external wind speed, thus improving airflow utilization efficiency.

[0025] In some embodiments, in the height direction of the transmitter, the top of the guide plate extends beyond the baffle and the heat dissipation surface; and the top of the guide plate has an arc-shaped structure.

[0026] In the technical solution of this application embodiment, the extended arc-shaped top provides a physical barrier for the top opening of the guide cavity, enhancing the device's ability to defend against precipitation, dust, and impurities from above. The guide plate protruding from the top can organize the lateral airflow coming from above, allowing it to leave the device area more orderly and reducing turbulence that may form at the top, which helps maintain the stability of the steering component during operation.

[0027] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 A schematic diagram of the external structure of a transmitter provided in some embodiments of this application; Figure 2 A schematic diagram of the external structure of a transmitter provided for other embodiments of this application; Figure 3 Partial cross-sectional views of a transmitter and a heat dissipation auxiliary device provided in some embodiments of this application; Figure 4 A schematic diagram of a heat dissipation auxiliary device for a shortwave amplitude modulation broadcast transmitter when the steering component and the enclosure are naturally drooping, as provided in some embodiments of this application; Figure 5 A schematic diagram of the structure of a shortwave amplitude modulation broadcast transmitter heat dissipation auxiliary device after the rotation of the steering component and the sealing component, as provided in some embodiments of this application; Figure 6 Cross-sectional view of a heat dissipation auxiliary device for a shortwave amplitude modulation broadcast transmitter when the steering component and the enclosure are naturally drooping, as provided in some embodiments of this application; Figure 7 This is a cross-sectional view of a shortwave amplitude modulation broadcast transmitter heat dissipation auxiliary device provided in some embodiments of this application after the steering component rotates; Figure 8 A cross-sectional view of a shortwave amplitude modulation broadcast transmitter heat dissipation auxiliary device provided in some embodiments of this application when the closure begins to rotate; Figure 9 This is a cross-sectional view of a shortwave amplitude modulation broadcast transmitter heat dissipation auxiliary device provided in some embodiments of this application after the enclosure is rotated; Figure 10 Before the closure rotates Figure 8 Enlarged view of point A in the middle; Figure 11 When the closure starts to rotate Figure 8 Enlarged view of point A in the middle Figure 12 for Figure 9 Enlarged view of point B in the middle.

[0030] Icons: 1-Transmitter; 10-Heat dissipation surface; 11-Heat dissipation vent; 2-Baffle; 20-First section; 21-Second section; 22-Sealing component; 220-Fifth section; 221-Sixth section; 23-Magnet block; 3-Connector; 4-Guide cavity; 5-Deviator; 50-Third section; 500-Counterweight; 51-Fourth section; 6-Guide plate; 7-Cover plate. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0033] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0034] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0036] In this application, "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0037] According to some embodiments of this application, optionally, such as Figures 1-7 As shown, this application provides a heat dissipation auxiliary device for a shortwave amplitude modulation (AM) broadcast transmitter. The heat dissipation auxiliary device includes a baffle 2, a deflector 5, and a pair of connectors 3. The baffle 2 is disposed opposite to the heat dissipation surface 10 of the transmitter 1, which has a heat dissipation port 11. The pair of connectors 3 are disposed opposite to each other along the length direction of the transmitter 1 and are connected between the baffle 2 and the heat dissipation surface 10, so that the baffle 2, the heat dissipation surface 10, and the pair of connectors 3 together form a flow guide cavity 4, and the heat dissipation port 11 is located in the flow guide cavity 4. The deflector 5 is hinged to the pair of connectors 3 and can rotate around the length direction of the transmitter 1. Along the height direction of the transmitter 1, the bottom end of the baffle 2 extends beyond the transmitter 1, and the bottom end of the deflector 5 extends beyond the baffle 2. The deflector 5 is configured to be driven by airflow to rotate until its top end overlaps with the baffle 2, thereby guiding the airflow toward the baffle 2 into the flow guide cavity 4 and blocking the airflow toward the heat dissipation surface 10.

[0038] When the surface of the transmitter 1 housing is provided with multiple heat sinks, the heat dissipation surface 10 is composed of the end faces of multiple heat sinks.

[0039] The transmitter 1 mentioned in this application is a long-range wireless communication device that operates in the shortwave band and uses amplitude modulation.

[0040] In practical applications, the shortwave amplitude modulation broadcast transmitter heat dissipation auxiliary device provided in this application is installed on the outside of the housing of the outdoor base station transmitter 1, so that the baffle 2 and the heat dissipation surface 10 of the transmitter 1 with heat dissipation vents 11 are facing each other and placed parallel to each other. A pair of connecting parts 3 are fixed to both sides of the transmitter 1 housing by screws, extending along the height direction of the transmitter 1, ensuring that the baffle 2 and the heat dissipation surface 10 maintain a stable distance, thus forming a bottom and top open guide cavity 4, in which the heat dissipation vents 11 are located. The deflector 5 is hinged to the pair of connecting parts 3 by the pivots at both ends, and can rotate around the length direction of the transmitter 1. When the airflow is towards the baffle 2: the airflow acts directly on the exposed part of the deflector 5, pushing it to rotate, so that the top of the deflector 5 overlaps with the inner side of the baffle 2. When the airflow is towards the heat dissipation surface 10: since the bottom end of the deflector 5 extends beyond the baffle 2, the airflow acts on the overhanging surface of the bottom of the deflector 5 that extends beyond the baffle 2. This torque will also drive the steering component 5 to rotate, resulting in its top end overlapping with the inner side of the baffle 2. Therefore, regardless of the horizontal direction of the airflow, the final stable state is that the top end of the steering component 5 overlaps with the baffle 2. The relative positions of the two form a unique, pressure-controlled dynamic airflow inlet. Subsequently, the airflow towards the baffle 2 is smoothly guided into the airflow cavity 4; the airflow towards the heat dissipation surface 10 is blocked and deflected by the outer surface of the steering component 5, preventing it from entering the airflow cavity 4.

[0041] After the airflow enters the guide cavity 4, since its initial direction is towards the baffle 2, it will directly impact the inner wall of the baffle 2. This impact process causes the airflow velocity to decrease dramatically and instantaneously. The dust particles in the airflow have a large mass and a large inertia. When the airflow suddenly decelerates, the dust particles cannot immediately change direction with the airflow. Under the action of inertia, they will continue to move forward and eventually impact and adhere to the inner wall of the baffle 2. After impacting the baffle 2, these dust particles will slide down the wall of the baffle 2 under the action of gravity and eventually be discharged from the system through the opening at the bottom of the guide cavity 4.

[0042] The airflow, having lost most of its kinetic energy and dust during the impact, transforms into a relatively clean, low-speed airflow. It flows naturally within the guide cavity 4 along the channel between the baffle 2 and the heat dissipation surface 10, its flow direction roughly parallel to the heat dissipation surface 10. This parallel, clean airflow gently and continuously carries away the hot air escaping from the heat dissipation vent 11, forming a highly efficient heat exchange.

[0043] The cooperation between the deflector 5 and the baffle 2 ensures that external airflow can only enter the guide cavity 4 through a controlled, single inlet formed by the deflector 5 and the baffle 2. This eliminates the possibility of airflow directly impacting the heat dissipation vent 11 from other paths, thus achieving airflow guidance and control. The process of the airflow impacting the baffle 2 after entering the guide cavity 4 separates the airflow from the dust, ensuring that the subsequent airflow acting on the heat dissipation surface 10 is low-speed and low-pressure, primarily brushing against the surface of the heat dissipation vent 11 for heat exchange, while also helping to prevent dust from entering. Wind forces from different directions are ultimately converted into positive pressure that strengthens the seal between the deflector 5 and the baffle 2. The stronger the wind, the stronger the sealing pressure, the more stable the shape of the guide inlet, and the better the protective effect.

[0044] In practice, the inner surface of the baffle 2 (i.e. the windward side) can be coated or made of special hydrophobic and easy-to-clean materials, so that water droplets and mud that hit it are difficult to adhere and can be quickly carried away by the airflow, thus improving the self-cleaning ability.

[0045] According to some embodiments of this application, optionally, such as Figures 1-3 , Figures 6-7 As shown, the baffle 2 is divided into a first section 20 and a second section 21 along the height direction of the transmitter 1; the first section 20 is closer to the steering component 5 than the second section 21; the distance between the first section 20 and the heat dissipation surface 10 is smaller than the distance between the second section 21 and the heat dissipation surface 10.

[0046] In practical application, the baffle 2 is divided into a first section 20 and a second section 21 along the height direction of the transmitter 1. The distance between the first section 20 and the heat dissipation surface 10 is set to be smaller than the distance between the second section 21 and the heat dissipation surface 10, thus forming a stepped flow channel that is narrow at first and wide at the end within the guide cavity 4. When the airflow is guided into the guide cavity 4 by the deflector 5, it first enters the narrow gap formed by the first section 20 and the heat dissipation surface 10. The reduced flow cross-section accelerates the airflow, forming a high-speed jet. During this process, larger and heavier dust particles carried in the airflow directly impact the first section 20 due to inertia, achieving initial separation. The high-speed airflow then enters the spacious space formed by the second section 21 and the heat dissipation surface 10. The sudden increase in the flow cross-section causes a significant decrease in airflow velocity. The reduced kinetic energy causes smaller and lighter dust particles to settle under gravity, achieving secondary settling. The stepped flow channel guides the airflow through a process from acceleration to deceleration. The acceleration phase enhances the ability of the airflow to strip away the static air layer on the surface of the heat dissipation surface 10; the deceleration phase extends the effective contact heat exchange time between the airflow and the heat dissipation surface 10, thereby improving the heat exchange efficiency.

[0047] The space enclosed by the heat dissipation surface 10 and the first section 20 inertially separates large dust particles in the airflow, while the space enclosed by the second section 21 slows down and settles small dust particles in the airflow. This effectively removes dust particles of different sizes from the airflow, improving dust prevention efficiency compared to guide cavities with uniform or constant cross-sections. The narrow-to-wide flow channel structure combines the benefits of forced convection and natural convection. The narrow channel of the first section 20 increases the airflow velocity, enhancing the forced convection cooling effect; the spacious space of the second section 21 is more conducive to the rise of hot air and natural convection, optimizing the overall heat dissipation efficiency. The narrow-to-wide flow channel design makes the airflow within the guide cavity 4 more orderly and controllable. Under the action of gravity, the separated dust slides down the inner wall of the baffles 2 of the first section 20 and the second section 21 to the bottom for discharge. The entire cavity has good self-cleaning ability, preventing dust accumulation inside.

[0048] In practice, a smoother coating can be designed on the inner surface of the first section 20 to reduce frictional resistance, which is beneficial for airflow acceleration and dust particle rebound; while a micro-adhesive or electrostatic adsorption coating can be designed on the inner surface of the second section 21 to more effectively capture and retain fine particles after deceleration.

[0049] According to some embodiments of this application, optionally, such as Figures 4-7 As shown, there is a smooth transition between the first segment 20 and the second segment 21.

[0050] In practical applications, when the airflow moves from the narrow first section 20 to the spacious second section 21 within the guide cavity 4, the change in its flow path is achieved through a smooth transition structure. This means that the transition between the first section 20 and the second section 21 is not an abrupt step or acute angle, but rather a continuous, smooth curved surface or slope.

[0051] The smooth transition structure avoids severe vortices and flow separation caused by abrupt changes in the flow channel cross-section. This not only reduces the loss of airflow kinetic energy and ensures efficient flow guidance and heat dissipation, but also reduces noise generated by airflow disturbances, which is particularly important for noise-sensitive applications. The smoothly connected flow channel allows the airflow to transition smoothly from high-speed to low-speed states. It prevents settled dust from being re-entrained due to vortices, ensuring the dust removal effect of the secondary deceleration and settling process, and making the airflow organization within the entire guide cavity 4 more stable and controllable. The smooth transition avoids stress concentration, enhances the structural strength and long-term reliability of the baffle 2 at this critical connection point, and can better withstand wind load vibrations and potential physical collisions.

[0052] According to some embodiments of this application, optionally, such as Figure 1 , Figures 3-7As shown, the rotation axis L1 of the steering component 5 divides it into a third segment 50 and a fourth segment 51, with the third segment 50 and the fourth segment 51 located on opposite sides of the rotation axis L1. The projection of the third segment 50 onto the baffle 2 extends beyond the baffle 2, while the projection of the fourth segment 51 onto the baffle 2 falls within the range of the baffle 2. Furthermore, the distance from the rotation axis L1 to the free end of the third segment 50 is less than the distance from the third segment 50 to the free end of the fourth segment 51.

[0053] In practical applications, when airflow (regardless of whether it is directed towards baffle 2 or heat dissipation surface 10) acts on the larger fourth section 51, due to the long lever arm, even with a small wind force, sufficient torque can be generated to drive the entire steering component 5 to rotate lightly, causing its top to quickly overlap with the inner side of baffle 2, forming a flow inlet. Once overlapped, the wind pressure will mainly concentrate on the fourth section 51. This long lever arm structure can convert the wind pressure into a strong sealing pressure, ensuring the stability of the overlap.

[0054] The asymmetric lever design makes the steering component 5 extremely sensitive to even weak airflow, enabling it to quickly respond to changes in wind direction and reach its working position, thus improving the device's adaptability in environments with varying wind directions. The long lever arm ensures sufficient contact pressure between the steering component 5 and the baffle 2 under strong wind conditions, preventing airflow from short-circuiting through gaps and guaranteeing the reliability of airflow guidance and sealing. This design balances operating torque and restoring torque. In calm or light wind conditions, the steering component 5 naturally droops due to gravity; once wind arrives, it can quickly move by overcoming gravity and friction thanks to its lever advantage.

[0055] According to some embodiments of this application, optionally, the weight of the third segment 50 is greater than the weight of the fourth segment 51.

[0056] In practical applications, under windless or light wind conditions, because the weight of the third section 50 is greater than that of the fourth section 51, the center of gravity of the entire steering component 5 is significantly shifted to the third section 50. Without external force, the steering component 5 will automatically allow its third section 50 to droop naturally under the influence of gravitational torque, thus causing the free end of the fourth section 51 to detach from its contact with the baffle 2, maintaining an open posture. This ensures that the transmitter 1 can effectively dissipate heat through natural convection at the open bottom of the guide cavity 4 under windless conditions. When airflow acts on the fourth section 51, the restoring torque generated by the weight imbalance of the third section 50 must first be overcome before the steering component 5 can rotate and contact the baffle 2. This design allows the steering component 5 to remain stable under constant-direction light winds, avoiding frequent opening and closing. Once the wind force is sufficient to drive it, its long lever arm structure still ensures good sealing pressure.

[0057] Gravity is used to maintain the default open state of steering component 5, ensuring that heat dissipation does not deteriorate under windless conditions. This recovery mechanism is completely passive, requires no additional energy, and is reliable. The heavier third segment 50 acts as a counterweight, increasing the rotational inertia of steering component 5, enabling it to resist brief, minor wind fluctuations and avoiding frequent shaking or oscillations near critical wind speeds, thereby improving the stability and lifespan of the device. In environments with vibration or instantaneous gusts, the additional weight provides better damping, making the movement of steering component 5 smoother and more decisive, reducing the possibility of malfunction.

[0058] According to some embodiments of this application, optionally, such as Figure 1 , Figures 3-7 As shown, the third segment 50 is also equipped with a counterweight 500; the counterweight 500 is positioned close to the rotation axis L1.

[0059] In practical applications, when wind force acts on the fourth segment 51, the moment of inertia of the steering component 5 is reduced because the main additional mass (i.e., the counterweight 500) is close to the center of rotation. This makes the steering component 5 more rapid and sensitive in response to changes in wind force, reducing action delay. When the wind force weakens or disappears, because the overall center of gravity is still on the side of the rotation axis L1 closer to the third segment 50, the steering component 5 can reliably return to the default open state of the third segment 50 under the action of gravitational torque. Because the counterweight 500 is close to the fulcrum, its inertial oscillation during the recovery process is smaller, and the state transition is smoother.

[0060] By setting a counterweight to bring the center of gravity of the steering component 5 closer to the rotation axis L1, the moment of inertia is reduced. This makes the steering component 5 more responsive to changes in wind direction and force, enabling it to more quickly establish or disengage from the baffle 2, thus improving the adaptability of the heat dissipation auxiliary device provided in this application in variable wind conditions. The closer proximity of the center of gravity to the axis makes the movement of the steering component 5 more controllable during startup and reset, suppressing unnecessary oscillations or overshoot, and enhancing operational stability and reliability. The counterweight 500, as a module independent of the steering component 5 itself, allows for precise on-site calibration of the dynamic performance of the steering component 5 by adjusting its mass or installation position to achieve optimal operating conditions.

[0061] In the specific implementation process, a set of standardized counterweights with different masses that can be easily inserted and removed can be designed. The installers can select the most suitable counterweight for installation based on the specific environment where the transmitter 1 is located (such as windy areas, valleys with frequent gusts of wind, or plains).

[0062] According to some embodiments of this application, optionally, such as Figures 1-9As shown, the baffle 2 is also provided with a sealing member 22, which is hinged to the baffle 2 and can rotate around the length direction of the transmitter 1; the deflector 5 is configured to be driven by the airflow to rotate to the free end of the fourth section 51 and overlap with the sealing member 22; the sealing member 22 is configured to be rotated to its top end and overlap with the heat dissipation surface 10 when the thrust of the airflow and the deflector 5 reaches the threshold, so as to block the airflow from entering the guide cavity 4.

[0063] In practical applications, under common wind speeds, the deflector 5 is driven by airflow, and its fourth segment 51's free end rotates and overlaps with the sealing member 22, putting the device in a flow-guiding and heat-dissipating state. When the wind speed increases to a specific threshold, the wind pressure acting on the deflector 5 is relatively large. At this time, the free end of the fourth segment 51 is no longer directly used for flow guidance, but instead pushes the sealing member 22, causing it to rotate around the hinge axis. Under the combined drive of the airflow and the thrust of the deflector 5, the sealing member 22 rotates upward (or inward) until its top end tightly overlaps with the heat dissipation surface 10 of the transmitter 1. Once the sealing member 22 overlaps with the heat dissipation surface 10, it completely seals the entrance to the flow-guiding cavity 4, completely blocking the path of external airflow (especially strong winds carrying high concentrations of dust) into the flow-guiding cavity 4 and impacting the heat dissipation port 11.

[0064] The shortwave amplitude modulation broadcast transmitter heat dissipation auxiliary device provided in this application prioritizes heat dissipation under normal conditions and automatically switches to a sealed protection mode under extreme wind and sand conditions, thereby improving the survivability and reliability of transmitter 1 in harsh environments. The mode switching is passively triggered entirely by the environmental parameter of wind pressure, without the need for sensors, controllers, or external power sources. The trigger threshold is determined by the structure, weight, and articulated friction of the steering component 5 and the enclosure 22, making the mechanism simple, reliable, and easy to maintain.

[0065] In practice, the heat dissipation surface 10 may be composed of the end faces of multiple heat sinks, and the top of the sealing member 22 may be provided with multiple vertical teeth that can be inserted into the gaps between the heat sinks, thereby preventing airflow carrying a lot of sand and dust from entering the guide cavity 4.

[0066] At the contact edge where the enclosure 22 overlaps with the heat dissipation surface 10, a flexible sealing strip (such as rubber or silicone) can be wrapped or embedded. This improves airtightness in fully sealed mode and blocks fine dust.

[0067] According to some embodiments of this application, optionally, such as Figures 3-12 As shown, the rotation axis L2 of the enclosure 22 divides it into a fifth segment 220 and a sixth segment 221 located on both sides of the axis; the fourth segment 51 can overlap with the fifth segment 220, and the free end of the sixth segment 221 can overlap with the heat dissipation surface 10; the distance from the rotation axis L2 to the free end of the sixth segment 221 is less than the distance from it to the free end of the fifth segment 220; the baffle 2 and the free end of the sixth segment 221 are respectively provided with mutually attractive magnet blocks 23.

[0068] In practical applications, under windless or normal wind speed conditions, the magnets 23 installed on the free ends of the sixth segment 221 of the baffle 2 and the closure 22 attract each other. This magnetic attraction provides an additional resistance torque for the closure 22, keeping it stably in the open position and effectively preventing malfunctions caused by slight vibrations or minor wind forces, ensuring stable ventilation and heat dissipation of the guide cavity 4 under normal conditions. When a strong wind drives the fourth segment 51 of the steering component 5 to rotate and push the fifth segment 220 of the closure 22 with its free end, the steering component 5 must apply sufficient thrust to overcome the attraction between the magnets 23 and the inertia of the closure 22 itself. Once the attraction between the magnets 23 is broken and pushed away to a distance where the magnetic force significantly weakens, the resistance decreases dramatically. At this point, the closure 22 becomes very easy to continue pushing, and the system energy is converted from overcoming the magnetic force to driving the closure 22 to rotate rapidly. Under the combined drive of the lever effect and wind pressure, the free end of the sixth segment 221 of the closure 22 quickly rotates inward and tightly contacts the heat dissipation surface 10. At this point, the magnet blocks 23 that were originally attracted to each other have separated to a considerable distance, and their influence is negligible. The stability of the seal is maintained by the structural overlap and wind pressure.

[0069] Furthermore, after the steering component 5 pushes the sealing component 22 to separate from the magnet block 23 on the baffle 2, the sealing component 22 can continue to rotate under the influence of inertia and airflow until the free end of the sixth segment 221 contacts the heat dissipation surface 10. At the same time, the free end of the fourth segment 51 separates from the fifth segment 220, and the airflow can pass through the opening that appears on the baffle 2 after the sealing component 22 rotates. On the one hand, this pushes the sealing component 22 to adhere tightly to the heat dissipation surface 10, and on the other hand, it prevents the steering component 5 and the baffle 2 from being damaged under strong and continuous wind pressure.

[0070] The introduction of magnet 23 sets a clear mechanical threshold for mode switching, ensuring that the device only activates the sealing mode when the wind pressure reaches the preset protection threshold, thus improving the system's anti-interference capability and operational reliability. This design makes the activation process of the closure 22 non-linear; once triggered, the resistance drops sharply, and the closure 22 can quickly pass through the intermediate stroke and instantly complete the closing action, shortening the exposure time under harsh conditions.

[0071] According to some embodiments of this application, optionally, such as Figures 1-9 As shown, it also includes multiple guide plates 6, which are disposed in the guide cavity 4 and are arranged at intervals along the length direction of the transmitter 1, and connect the heat dissipation surface 10 and the baffle 2; in the length direction of the transmitter 1, the edge of the heat dissipation port 11 extends beyond any of the guide plates 6.

[0072] In practical applications, multiple guide plates 6 are installed within the flow guiding cavity 4. These guide plates 6 divide the flow guiding cavity 4 into multiple continuous flow channels along the length of the transmitter 1. When the airflow is guided into the flow guiding cavity 4 by the deflector 5, these guide plates 6 act as a guide and channel for the airflow, forcing it to flow within the channels formed by the guide plates 6, reducing lateral movement and disordered vortices. This ensures that the airflow can more evenly cover and flow through different areas of the entire heat dissipation surface 10. Since the edges of the heat dissipation vents 11 extend beyond any guide plate 6 along the length of the transmitter 1, the guide plates 6 do not obstruct any heat dissipation vents 11. All heat dissipation vents 11 are fully exposed to the organized airflow guided by the guide plates 6, ensuring that the heat dissipation area is fully utilized.

[0073] The guide plate 6 eliminates potential dead zones or low-speed zones on the heat dissipation surface 10, forcing airflow to more evenly scour all heat dissipation vents 11, preventing localized overheating and improving overall heat dissipation efficiency. Connecting the heat dissipation surface 10 and the baffle 2, the guide plate 6 acts like a rib or support, enhancing the mechanical strength and rigidity of the entire guide cavity 4 assembly, making it more resistant to wind loads and vibrations, and improving the stability and lifespan of the device. The orderly airflow organization reduces flow losses, allowing more effective airflow to participate in heat dissipation under the same external wind speed, thus improving airflow utilization efficiency.

[0074] According to some embodiments of this application, optionally, such as Figures 1-9 As shown, in the height direction of the transmitter 1, the top of the guide plate 6 extends beyond the baffle 2 and the heat dissipation surface 10; and the top of the guide plate 6 has an arc-shaped structure.

[0075] In practical applications, the guide vane 6 extends upwards along the height of the transmitter 1, its top extending beyond both the heat dissipation surface 10 and the baffle 2. These protruding parts form a row of arc-shaped fins arranged along the length of the transmitter 1. When airflow (especially raindrops) approaches the transmitter 1 from above, these protruding arc-shaped structures first contact the airflow, effectively guiding and diverting airflow and impurities (such as rainwater and large fallen leaves) to both sides, forming a protective umbrella effect and reducing the probability of them falling directly onto the top opening between the baffle 2 and the heat dissipation surface 10. Its arc-shaped design makes the diversion process very smooth, generating almost no additional wind noise or eddies.

[0076] The extended arc-shaped tip provides a physical barrier for the top opening of the guide cavity 4, enhancing the device's defense against precipitation, dust, and impurities from above. The guide plate 6 protruding from the top can manage the lateral airflow coming from above, allowing it to leave the device area more orderly and reducing turbulence that may form at the top, which helps maintain the stability of the steering component 5 during operation.

[0077] In the specific implementation process, such as Figures 1-9 As shown, a cover plate 7, whose shape matches the arc-shaped structure of the guide plate 6, can be installed above the guide plate 6. A gap exists between the cover plate 7 and the plane formed by the arc-shaped structures at the top of the multiple guide plates 6, allowing lateral airflow to pass through. On one hand, the cover plate 7 can more effectively prevent rainwater, leaves, birds, animals, and other debris from entering the guide cavity 4. On the other hand, the narrow gap formed between the cover plate 7 and the top of the guide plate 6 increases the velocity of the natural wind passing through this gap, thereby attracting hot air between the guide plates 6 to easily leave the guide cavity 4 along with the accelerated lateral airflow, thus accelerating heat exchange efficiency.

[0078] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A short wave amplitude modulation broadcast transmitter heat dissipation auxiliary device, said transmitter having a heat dissipation surface provided with a heat dissipation opening, characterized in that, Comprising: a baffle, disposed opposite to the heat dissipation surface; a pair of connecting members, disposed opposite along the length direction of the transmitter and connected between the baffle and the heat dissipation surface, so that the baffle, the heat dissipation surface and the pair of connecting members together form a flow guide cavity, and the heat dissipation port is located in the flow guide cavity; a turning member, hinged to the pair of connecting members and capable of rotating around the length direction of the transmitter; along the height direction of the transmitter, the bottom end of the baffle extends beyond the transmitter, and the bottom end of the turning member extends beyond the baffle; the turning member is configured to be driven by airflow to rotate to the top end thereof to lap the baffle, thereby guiding the airflow toward the baffle into the flow guide cavity and blocking the airflow toward the heat dissipation surface.

2. The short-wave amplitude modulation broadcast transmitter heat dissipation auxiliary device according to claim 1, wherein: the baffle is divided into a first segment and a second segment along the height direction of the transmitter; the first segment is closer to the turning member than the second segment; the distance between the first segment and the heat dissipation surface is smaller than the distance between the second segment and the heat dissipation surface.

3. The short-wave amplitude modulation broadcast transmitter heat dissipation auxiliary device according to claim 2, wherein: the first segment and the second segment are smoothly connected.

4. The short-wave amplitude modulation broadcast transmitter heat dissipation auxiliary device according to claim 1, wherein: the turning member is divided into a third segment and a fourth segment by a rotation axis L1, and the third segment and the fourth segment are located on opposite sides of the rotation axis L1; the projection of the third segment on the baffle extends beyond the baffle, and the projection of the fourth segment on the baffle falls within the range of the baffle; and the distance from the rotation axis L1 to the free end of the third segment is smaller than the distance from the rotation axis L1 to the free end of the fourth segment.

5. The short-wave amplitude modulation broadcast transmitter heat dissipation auxiliary device according to claim 4, wherein: the weight of the third segment is greater than the weight of the fourth segment.

6. The short-wave amplitude modulation broadcast transmitter heat dissipation auxiliary device according to claim 5, wherein: the third segment is further provided with a counterweight; the counterweight is disposed close to the rotation axis L1.

7. The short-wave amplitude modulation broadcast transmitter heat dissipation auxiliary device according to claim 5, wherein: the baffle is further provided with a closing member, which is hinged to the baffle and capable of rotating around the length direction of the transmitter; the turning member is configured to be driven by airflow to rotate to the free end of the fourth segment to lap the closing member; the closing member is configured to rotate to the top end thereof to lap the heat dissipation surface to block the airflow into the flow guide cavity when the thrust of the airflow and the turning member reaches a threshold.

8. The short-wave amplitude modulation broadcast transmitter heat dissipation auxiliary device according to claim 7, wherein: the closing member is divided into a fifth segment and a sixth segment on both sides of a rotation axis L2; the fourth segment can lap the fifth segment, and the free end of the sixth segment can lap the heat dissipation surface; The distance from the rotation axis L2 to the free end of the sixth section is less than the distance to the free end of the fifth section; The baffle and the free end of the sixth section are respectively provided with mutually attractive magnet blocks.

9. A short wave amplitude modulation broadcast transmitter heat sink auxiliary device according to claim 1, characterized in that, Further comprising: A plurality of guide plates are arranged in the guide cavity, spaced along the length direction of the transmitter, and connected to the heat dissipation surface and the baffle; In the length direction of the transmitter, the edge of the heat dissipation port exceeds any of the guide plates.

10. The short wave amplitude modulation broadcast transmitter heat dissipation auxiliary device according to claim 9, wherein, In the height direction of the transmitter, the top end of the guide plate extends to exceed the baffle and the heat dissipation surface; And the top end of the guide plate is an arc structure.

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