A short wave amplitude modulation broadcast transmitter heat dissipation auxiliary device

Abstract

The application relates to a short-wave amplitude modulation broadcast transmitter heat dissipation auxiliary device and belongs to the technical field of transmission equipment. The short-wave amplitude modulation broadcast transmitter heat dissipation auxiliary device comprises a baffle, a turning piece and a pair of connecting pieces; the baffle is arranged opposite to a heat dissipation surface of the transmitter; the pair of connecting pieces are arranged opposite to each other and are connected between the baffle and the heat dissipation surface, so that the baffle, the heat dissipation surface and the pair of connecting pieces jointly enclose a flow guide cavity, and a heat dissipation opening is located in the flow guide cavity; the turning piece is hinged to the connecting piece and can rotate around the length direction of the transmitter; the bottom end of the baffle extends to beyond the transmitter, and the bottom end of the turning piece extends to beyond the baffle; the turning piece is configured to be driven by airflow to rotate to the top end of the turning piece to be overlapped with the baffle, so that the airflow towards the baffle is guided into the flow guide cavity, and the airflow towards the heat dissipation surface is blocked. The short-wave amplitude modulation broadcast transmitter heat dissipation auxiliary device provided by the application can efficiently dissipate heat of the transmitter and prevent dust from entering the interior of the transmitter.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transmission equipment, in particular to a short-wave amplitude modulation broadcast transmitter heat dissipation auxiliary device. BACKGROUND

[0002] The transmitter, especially the large transmitter applied to the outdoor base station, has a high requirement for the heat dissipation performance for stable operation. Therefore, multiple heat dissipation openings are usually arranged on the transmitter housing to utilize the natural convection or forced air cooling to timely discharge the heat generated by the internal electronic components.

[0003] However, the heat dissipation through the air flow also makes the dust, sand, willow catkins and other impurities easily enter the transmitter through the heat dissipation openings along with the airflow. The long-term accumulation of these impurities inside not only covers the surface of the heating elements to form a heat insulation layer, seriously hinders the heat dissipation efficiency, causes the transmitter to be overheated and performance to be degraded or even damaged, but also may cause the circuit short circuit and finally affect the signal transmission quality and working life of the transmitter.

[0004] At present, the common protection measures such as installing a dust screen on the heat dissipation opening can play a certain blocking role, but the dust is easy to block the mesh, which further aggravates the poor heat dissipation, and frequent manual cleaning and maintenance are required, which is high in cost and limited in effect. In addition, some simple baffle structures can block part of the linear direction dust, but the protection effect is not ideal for the airflow and dust invasion with complex directionality, and it is difficult to realize long-term and self-adaptive effective dust prevention while ensuring efficient heat dissipation.

[0005] Therefore, there is an urgent need in the prior art for a solution that can efficiently dissipate heat while actively preventing dust from entering the transmitter. SUMMARY

[0006] The present application aims to solve the above problems, and provides a short-wave amplitude modulation broadcast transmitter heat dissipation auxiliary device, which can efficiently dissipate heat while preventing dust from entering the transmitter, so as to improve the above problems.

[0007] The present application is realized by the following technical solutions:

[0008] The application provides a short-wave amplitude modulation broadcast transmitter heat dissipation auxiliary device, which comprises a baffle, a turning piece and a pair of connecting pieces; the baffle is arranged opposite to a heat dissipation surface of the transmitter which is provided with a heat dissipation opening; the pair of connecting pieces are arranged opposite along the length direction 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 connecting pieces jointly form a flow guide cavity, and the heat dissipation opening is located in the flow guide cavity; the turning piece is hinged to the pair of connecting pieces and can rotate 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 piece extends beyond the baffle; the turning piece is configured to be driven by air flow to rotate to the top end of the turning piece to be overlapped with the baffle, so as to guide the air flow toward the baffle into the flow guide cavity and block the air flow toward the heat dissipation surface.

[0009] In the technical scheme of the application, the cooperation of the turning piece and the baffle ensures that the external air flow can only enter the flow guide cavity through the single controlled inlet formed by the turning piece and the baffle. The possibility of air flow from other paths, especially directly impacting the heat dissipation opening, is eliminated, and the flow control of the air flow is realized. The process of the air flow impacting the baffle after entering the flow guide cavity separates the air flow from dust, so that the subsequent air flow acting on the heat dissipation surface is low-speed and low-pressure, mainly passing through the surface of the heat dissipation opening for heat exchange, and at the same time, it helps to avoid dust entering. Wind power from different directions is finally converted into positive pressure that strengthens the sealing overlap of the turning piece and the baffle. The greater the wind, the stronger the sealing pressure, the more stable the form of the flow guide inlet, and the better the protection effect.

[0010] In some embodiments, the baffle is divided into a first section and a second section along the height direction of the transmitter; the first section is closer to the turning piece than the second section; the spacing between the first section and the heat dissipation surface is smaller than the spacing between the second section and the heat dissipation surface.

[0011] In the technical scheme of the application, the space surrounded by the heat dissipation surface and the first section performs inertial separation on large dust particles in the air flow, and the space surrounded by the heat dissipation surface and the second section performs deceleration settling on small dust particles in the air flow, so that dust particles of different particle sizes in the air flow are effectively removed, and the dust prevention efficiency is improved compared with the flow guide cavity with a uniform cross section. The first-narrow-then-wide flow channel structure cooperates the benefits of forced convection and natural convection. The narrow channel of the first section increases the air flow speed and enhances the forced convection heat dissipation effect; the spacious space of the second section is more conducive to the upward movement of hot air and natural convection, and the overall heat dissipation efficiency is optimized. The first-narrow-then-wide flow channel design makes the flow of the air flow in the flow guide cavity more orderly and controllable. The separated dust falls along the inner walls of the baffles of the first section and the second section to the bottom and is discharged under the action of gravity, and the entire cavity has good self-cleaning ability to prevent internal dust accumulation.

[0012] In some embodiments, the first section and the second section are smoothly transitioned.

[0013] The smooth transition structure avoids the generation of violent vortex and flow separation when the airflow changes suddenly in the cross section of the flow channel. This not only reduces the loss of kinetic energy of the airflow, ensures the efficiency of flow guiding and heat dissipation, but also reduces the noise generated by airflow disturbance, which is particularly important for application scenarios sensitive to noise. The smooth connection of the flow channel enables the airflow to smoothly transition from a high-speed state to a low-speed state. It prevents the settled dust from being re-volatilized due to vortex, ensuring the dust removal effect of the secondary deceleration settling process, and making the airflow organization in the entire flow guiding cavity more stable and controllable. The smooth transition avoids stress concentration, enhances the structural strength and long-term reliability of the baffle at the key connection, and can better withstand wind load vibration and potential physical impact.

[0014] In some embodiments, the rotation axis L1 of the turning piece divides it into a third segment and a fourth segment, 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 exceeds 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 less than the distance from the rotation axis L1 to the free end of the fourth segment.

[0015] In the technical scheme of the embodiments of the present application, the asymmetric lever design makes the turning piece extremely sensitive to weak airflow and can quickly respond to changes in wind direction and reach the working position, improving the adaptability of the device in a variable wind environment. The long force arm ensures that the turning piece and the baffle can maintain sufficient adhesion pressure under strong wind conditions, preventing airflow from short-circuiting through the gap and ensuring the reliability of flow guiding and sealing. This design balances the operating torque and restoring torque. In the absence of wind or in a light wind state, the turning piece naturally droops due to gravity; as soon as there is wind, it can quickly act by overcoming gravity and friction with the advantage of leverage.

[0016] In some embodiments, the weight of the third segment is greater than the weight of the fourth segment.

[0017] In the technical scheme of the embodiments of the present application, the default open state of the turning piece is achieved by gravity, ensuring that the heat dissipation does not deteriorate under windless conditions. This restoring mechanism is completely passive, does not require additional energy, and is reliable. The third segment, which is heavier, acts as a counterweight, increasing the inertia of the turning piece rotation, allowing it to resist temporary and small wind fluctuations, avoiding frequent shaking or oscillation near the critical wind speed, and thus improving the stability and service life of the device. In an environment with vibration or transient gusts, the additional weight provides better damping effect, making the turning piece's action more stable and decisive, reducing the possibility of misoperation.

[0018] In some embodiments, the third segment is also provided with a counterweight; the counterweight is arranged close to the rotation axis L1.

[0019] In the technical scheme of the embodiment of the application, the gravity center of the turning part is close to the rotation axis L1 by setting the counterweight, the moment of inertia is reduced, the turning part responds more sensitively to the change of wind direction and wind force, and the lapping state with the baffle can be formed or released more quickly, so that the adaptability of the heat dissipation auxiliary device provided by the application in the variable wind field is improved. The gravity center close to the axis makes the movement of the turning part in the starting and resetting process more controllable, unnecessary oscillation or overshoot phenomenon is inhibited, and the stability and reliability of the work are enhanced. The counterweight is a module independent of the body of the turning part, which allows fine calibration of the dynamic performance of the turning part in the field by adjusting the mass or the installation position, so as to achieve the best working state.

[0020] In some embodiments, the baffle is further provided with a closing part, the closing part is hinged to the baffle and can rotate around the length direction of the transmitter; the turning part is configured to rotate to the lapping state with the free end of the fourth section and the closing part driven by the airflow; the closing part is configured to rotate to the lapping state with the top end and the heat dissipation surface to block the airflow into the flow guide cavity when the thrust of the airflow and the turning part reaches a threshold.

[0021] In the technical scheme of the embodiment of the application, the short wave amplitude modulation broadcast transmitter heat dissipation auxiliary device preferentially ensures heat dissipation under normal conditions and automatically switches to a sealed protection mode under extreme sandstorm conditions, so that the survival ability and reliability of the transmitter in harsh environments are improved. The switching of the mode is triggered passively by the wind pressure, an environmental parameter, without the need for sensors, controllers or external energy sources. The triggering threshold is determined by the structure, weight and hinged friction of the turning part and the closing part, and the mechanism is simple, reliable and easy to maintain.

[0022] In some embodiments, the rotation axis L2 of the closing part divides it into a fifth section and a sixth section on both sides of the axis; the fourth section can be lapped with the fifth section, and the free end of the sixth section can be lapped with the heat dissipation surface; the distance from the rotation axis L2 to the free end of the sixth section is less than the distance from the rotation axis L2 to the free end of the fifth section; the baffle and the free end of the sixth section are respectively provided with magnet blocks that attract each other.

[0023] In the technical scheme of the embodiment of the application, the introduction of the magnet blocks sets a clear mechanical threshold for mode switching, ensures that the device only starts the sealing mode when the wind pressure reaches the preset protection threshold, and improves the anti-interference ability and working reliability of the system. The starting process of the closing part is not linear, once triggered, the resistance drops sharply, the closing part can pass through the intermediate travel at a high speed, and the closing action is completed instantly, so that the exposure time under harsh conditions is shortened.

[0024] In some embodiments, a plurality of flow guides are further included, which are arranged in the flow guide cavity, are arranged in the length direction of the transmitter, and are 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 flow guide.

[0025] In the technical solution of the embodiment of the application, the flow guide plate eliminates the dead zones or low-speed zones that may exist on the heat dissipation surface, forces the airflow to uniformly flush all the heat dissipation openings, avoids local overheating, and improves the overall heat dissipation performance. The flow guide plate connected between the heat dissipation surface and the baffle plays a role similar to a rib plate or a supporting rib, enhances the mechanical strength and rigidity of the entire flow guide cavity assembly, makes it more capable of bearing wind load and vibration, and improves the stability and service life of the device. The orderly airflow organization reduces flow loss, so that more effective air volume is involved in heat dissipation under the same external wind speed, and the utilization efficiency of the airflow is improved.

[0026] In some embodiments, in the height direction of the transmitter, the top end of the flow guide plate extends beyond the baffle and the heat dissipation surface; and the top end of the flow guide plate is in an arc-shaped structure.

[0027] In the technical solution of the embodiment of the application, the extended arc-shaped top end provides a physical barrier for the top opening of the flow guide cavity, and improves the defense capability of the device against precipitation, falling dust and impurities from above. The flow guide plate protruding from the top can comb the transverse airflow coming from above, so that it leaves the device area more orderly, reducing the turbulence that may be formed at the top, which helps to maintain the stability of the turning piece.

[0028] Additional aspects and advantages of the application will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the application, and therefore should not be considered as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0030] Figure 1 The external structure schematic diagram of the transmitter is provided for some embodiments of the application;

[0031] Figure 2 The external structure schematic diagram of the transmitter is provided for some embodiments of the application;

[0032] Figure 3 The partial sectional view of the transmitter and the heat dissipation auxiliary device is provided for some embodiments of the application;

[0033] Figure 4 The structure schematic diagram of the short wave amplitude modulation broadcast transmitter heat dissipation auxiliary device when the turning piece and the closure naturally sag is provided for some embodiments of the application;

[0034] Figure 5 Structure diagram of the short wave amplitude modulation radio transmitter heat dissipation auxiliary device when the closing part is rotating for some embodiments of the present application;

[0035] Figure 6 Structure diagram of the short wave amplitude modulation radio transmitter heat dissipation auxiliary device when the closing part is rotating for some embodiments of the present application;

[0036] Figure 7 Structure diagram of the short wave amplitude modulation radio transmitter heat dissipation auxiliary device when the closing part is rotating for some embodiments of the present application;

[0037] Figure 8 Structure diagram of the short wave amplitude modulation radio transmitter heat dissipation auxiliary device when the closing part is rotating for some embodiments of the present application;

[0038] Figure 9 Structure diagram of the short wave amplitude modulation radio transmitter heat dissipation auxiliary device when the closing part is rotating for some embodiments of the present application;

[0039] Figure 10 Structure diagram of the short wave amplitude modulation radio transmitter heat dissipation auxiliary device when the closing part is rotating for some embodiments of the present application; Figure 8 Enlarged view of A in the above figure;

[0040] Figure 11 Enlarged view of A in the above figure; Figure 8 Enlarged view of A in the above figure

[0041] Figure 12 Enlarged view of B in the above figure. Figure 9 Enlarged view of B in the above figure.

[0042] Figure legend: 1-transmitter; 10-heat dissipation surface; 11-heat dissipation port; 2-baffle; 20-first section; 21-second section; 22-closing part; 220-fifth section; 221-sixth section; 23-magnet block; 3-connection part; 4-flow guide cavity; 5-turning part; 50-third section; 500-counterweight part; 51-fourth section; 6-flow guide plate; 7-cover plate. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification herein is for describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure and will not be interpreted in an overly literal sense unless expressly so defined herein.

[0045] Reference throughout this application to "embodiments" means embodiments which address the particular feature, structure, or characteristic described in connection with the embodiment. The appearance of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all referring to a common embodiment, or an embodiment that is independent of other embodiments. It is appreciated that the embodiments described herein can be combined with other embodiments in various ways.

[0046] In the description of the application, it is necessary to note that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "attaching" should be understood in a broad sense, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0047] The term "and / or" in the present application is only a description of the association relationship between the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can mean that there are three cases of A alone, A and B together, and B alone. In addition, the character " / " in the present application generally represents that the front and rear associated objects have an "or" relationship.

[0048] The "multiple" appearing in the present application refers to two or more (including two), and similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces).

[0049] According to some embodiments of the present application, optionally, Figures 1-7As shown, the application provides a short wave amplitude modulation broadcast transmitter heat dissipation auxiliary device, which comprises a baffle 2, a turning piece 5 and a pair of connecting pieces 3. The baffle 2 is arranged opposite to a heat dissipation surface 10 of the transmitter 1 which is provided with a heat dissipation opening 11. The pair of connecting pieces 3 are arranged opposite 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 connecting pieces 3 jointly form a flow guide cavity 4, and the heat dissipation opening 11 is located in the flow guide cavity 4. The turning piece 5 is hinged on the pair of connecting pieces 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 turning piece 5 extends beyond the baffle 2. The turning piece 5 is configured to be driven by airflow to rotate to the top end thereof to be overlapped with the baffle 2, so as to guide the airflow toward the baffle 2 into the flow guide cavity 4 and block the airflow toward the heat dissipation surface 10.

[0050] When the surface of the shell of the transmitter 1 is provided with a plurality of heat dissipation fins, the heat dissipation surface 10 is formed by the end surfaces of the plurality of heat dissipation fins.

[0051] The transmitter 1 mentioned in the application is a long-distance wireless communication device working in the short wave frequency band and adopting the amplitude modulation mode.

[0052] In actual application, the short wave amplitude modulation broadcast transmitter heat dissipation auxiliary device provided by the application is installed outside the shell of an outdoor base station transmitter 1, so that the baffle 2 is placed opposite and parallel to the heat dissipation surface 10 of the transmitter 1 which is provided with a heat dissipation opening 11. The pair of connecting pieces 3 are fixed on the two sides of the shell of the transmitter 1 by screws and extend along the height direction of the transmitter 1, so as to ensure that a stable distance is maintained between the baffle 2 and the heat dissipation surface 10, thereby jointly forming a flow guide cavity 4 which is open at the bottom and the top, and the heat dissipation opening 11 is located in the flow guide cavity 4. The turning piece 5 is hinged on the pair of connecting pieces 3 through the shafts at the two ends thereof and can rotate around the length direction of the transmitter 1. When the airflow is toward the baffle 2: the airflow directly acts on the part of the turning piece 5 exposed outside to push the turning piece 5 to rotate, so that the top end of the turning piece 5 is overlapped with the inner side of the baffle 2. When the airflow is toward the heat dissipation surface 10: since the bottom end of the turning piece 5 extends beyond the baffle 2, the airflow will act on the part of the bottom end of the turning piece 5 which extends beyond the baffle 2. This torque will also push the turning piece 5 to rotate, and the result is also that the top end of the turning piece 5 is overlapped with the inner side of the baffle 2. Therefore, no matter which horizontal direction the airflow comes from, the final stable state is that the top end of the turning piece 5 is overlapped with the baffle 2. The relative position of the two forms a unique dynamic flow guide inlet which is controlled by wind pressure. Then, the airflow toward the baffle 2 is smoothly guided into the flow guide cavity 4, and the airflow toward the heat dissipation surface 10 is blocked and turned by the outer surface of the turning piece 5 and cannot enter the flow guide cavity 4.

[0053] When the airflow enters the guide cavity 4, it will directly impact the inner wall of the baffle 2 because its initial direction is towards the baffle 2. This impact process makes the airflow speed instantaneously greatly reduced. The dust particles in the airflow have large mass and inertia. When the airflow suddenly decelerates, the dust particles cannot immediately change direction and continue to move forward under the action of inertia, and finally impact and adhere to the inner wall of the baffle 2. After impacting the baffle 2, the dust particles will slide down along the wall of the baffle 2 under the action of gravity, and finally be discharged out of the system from the opening at the bottom of the guide cavity 4.

[0054] The airflow losing most of the kinetic energy and dust in the impact is converted into a relatively clean and low-speed airflow. It will naturally flow along the channel between the baffle 2 and the heat dissipation surface 10 in the guide cavity 4, and the flow direction is substantially parallel to the heat dissipation surface 10. This parallel and clean airflow can pass through the surface of the heat dissipation port 11, gently and continuously taking away the hot air escaping from the heat dissipation port 11, forming an efficient heat exchange.

[0055] The cooperation of the deflector 5 and the baffle 2 ensures that the external airflow can only enter the guide cavity 4 through the controlled single inlet formed by the deflector 5 and the baffle 2. The possibility of airflow directly impacting the heat dissipation port 11 from other paths is eliminated, and the guide control of the airflow is realized. The process of the airflow impacting the baffle 2 after entering the guide cavity 4 separates the airflow from the dust, and the subsequent airflow acting on the heat dissipation surface 10 is low-speed and low-pressure, mainly passing through the surface of the heat dissipation port 11 for heat exchange, while helping to avoid dust entering. Wind from different directions is finally converted into a positive pressure that strengthens the sealing of the deflector 5 and the baffle 2. The greater the wind, the stronger the sealing pressure, the more stable the form of the guide inlet, and the better the protection effect.

[0056] In the specific implementation process, the inner surface (i.e., the windward surface) of the baffle 2 can be coated or made of special hydrophobic and easy-to-clean materials, so that water droplets and mud impacting on it are difficult to adhere and can be quickly taken away by the airflow, improving the self-cleaning ability.

[0057] According to some embodiments of the present application, as shown in Figures 1-3 , Figures 6-7 , 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 deflector 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.

[0058] 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, so as to form a stepped flow channel with a narrow first section and a wide second section in the flow guide cavity 4. When the airflow is introduced into the flow guide cavity 4 by the flow guide 5, the airflow first enters the narrow gap formed by the first section 20 and the heat dissipation surface 10. The reduced flow cross section causes the airflow to accelerate and form a high-speed jet. In this process, the larger and heavier dust particles carried in the airflow directly impact on the first section 20 due to the inertial effect, so as to achieve preliminary 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 of the flow cross section causes the airflow speed to decrease significantly. The reduced kinetic energy causes the smaller and lighter dust particles to settle under the action of gravity, so as to achieve secondary settlement. The stepped flow channel guides the airflow to experience a process from acceleration to deceleration. The acceleration stage enhances the peeling ability of the airflow to the static air layer on the surface of the heat dissipation surface 10; and the deceleration stage prolongs the effective contact and heat exchange time of the airflow with the heat dissipation surface 10, so as to improve the heat exchange efficiency.

[0059] The space surrounded by the heat dissipation surface 10 and the first section 20 separates the large particle dust in the airflow by inertia, and the space surrounded by the second section 21 separates the small particle dust in the airflow by deceleration and settlement, so as to effectively remove the dust particles with different particle sizes in the airflow, and the dustproof efficiency is improved compared with the flow guide cavity with equal cross section or constant cross section. The flow channel structure with a narrow first section and a wide second section cooperates the advantages of forced convection and natural convection. The narrow channel of the first section 20 increases the airflow speed and enhances the forced convection heat dissipation effect; and the spacious space of the second section 21 is more conducive to the rising of hot air and natural convection, so that the overall heat dissipation efficiency is optimized. The flow channel structure with a narrow first section and a wide second section makes the airflow flow more orderly and controllably in the flow guide cavity 4. The separated dust slides along the inner wall of the baffle 2 of the first section 20 and the second section 21 to the bottom under the action of gravity and is discharged, so that the cavity has good self-cleaning ability and prevents internal dust accumulation.

[0060] In the specific implementation process, a smoother coating can be designed on the inner surface of the first section 20 to reduce frictional resistance, which is beneficial to the acceleration of the airflow and the rebound of the dust particles; and a slightly sticky or electrostatic adsorption coating can be designed on the inner surface of the second section 21 to more effectively capture and retain the fine particles after deceleration.

[0061] According to some embodiments of the present application, as shown in Figures 4-7 optionally, the first section 20 and the second section 21 are smoothly connected.

[0062] In practical application, when the airflow flows from the narrow first section 20 to the spacious second section 21 in the flow guide cavity 4, the change of the flow channel is realized through the smooth transition structure. This means that the first section 20 and the second section 21 are not a sudden step or an acute angle, but a continuous and smooth curved surface or inclined surface.

[0063] The smooth transition structure avoids the generation of strong vortex and flow separation when the airflow changes suddenly in the cross section of the flow passage. This not only reduces the loss of airflow kinetic energy, ensures the efficiency of flow guiding and heat dissipation, but also reduces the noise generated by airflow disturbance, which is particularly important for application scenarios sensitive to noise. The smoothly connected flow passage enables the airflow to smoothly transition from a high-speed state to a low-speed state. It prevents the settled dust from being re-volatilized due to vortex, ensuring the dust removal effect of the secondary deceleration settling process, and making the airflow organization in the entire flow guiding 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 the key connection, and can better withstand wind load vibration and potential physical impact.

[0064] According to some embodiments of the present application, optionally, as shown in Figure 1 、 Figures 3-7 The rotation axis L1 of the turning piece 5 divides it into a third segment 50 and a fourth segment 51, and the third segment 50 and the fourth segment 51 are located on opposite sides of the rotation axis L1; the projection of the third segment 50 on the baffle 2 exceeds the baffle 2, and the projection of the fourth segment 51 on the baffle 2 falls within the range of the baffle 2; and the distance from the rotation axis L1 to the free end of the third segment 50 is less than the distance from the rotation axis L1 to the free end of the fourth segment 51.

[0065] In actual application, when the airflow (whether towards the baffle 2 or the heat dissipation surface 10) acts on the larger area fourth segment 51, due to the long force arm, even if the wind is small, it can generate enough torque to drive the entire turning piece 5 to rotate lightly, so that the top end quickly overlaps with the inner side of the baffle 2 to form a flow guiding inlet. Once the overlap occurs, the wind pressure will be mainly concentrated on the fourth segment 51, and this long force arm structure can convert the wind pressure into strong sealing pressure to ensure the stability of the overlap.

[0066] The asymmetric lever design makes the turning piece 5 extremely sensitive to weak airflow and can quickly respond to changes in wind direction and reach the working position, improving the adaptability of the device in a variable wind environment. The long force arm ensures that the turning piece 5 and the baffle 2 can maintain sufficient contact pressure under strong wind conditions to prevent airflow from short-circuiting through the gap and ensure the reliability of flow guiding and sealing. This design balances the operating torque and restoring torque. In the absence of wind or in a light wind state, the turning piece 5 naturally droops due to gravity; as soon as there is wind, it can quickly act by overcoming gravity and friction due to the leverage advantage.

[0067] According to some embodiments of the present application, optionally, the weight of the third segment 50 is greater than the weight of the fourth segment 51.

[0068] In actual application, when there is no wind or slight wind, the gravity center of the whole steering piece 5 is obviously biased to the side of the third section 50 due to the weight of the third section 50 being greater than that of the fourth section 51. Under the action of the gravity moment, the steering piece 5 automatically makes the third section 50 naturally droop, so that the free end of the fourth section 51 is separated from the lapping state with the baffle 2 and keeps an open posture. This ensures that the launcher 1 can effectively dissipate heat by natural convection through the open bottom of the flow guide cavity 4 under the condition of no wind. When the airflow acts on the fourth section 51, the restoring moment generated by the third section 50 needs to be overcome first, so that the steering piece 5 rotates and laps with the baffle 2. This design makes the steering piece 5 stable to the constant direction of slight wind and avoids frequent opening and closing. Once the wind is strong enough to drive it, the long force arm structure can still ensure good sealing pressure.

[0069] The default open state of the steering piece 5 is realized by using gravity to ensure that the heat dissipation does not deteriorate under the condition of no wind. The restoring mechanism is completely passive, does not require additional energy and is reliable. The third section 50 with the weight offset acts as a counterweight, increases the inertia of the rotation of the steering piece 5, and enables it to resist short-term and slight wind fluctuations, avoiding frequent shaking or oscillation near the critical wind speed, thereby improving the stability and service life of the device. In the environment with vibration or instantaneous gust, the additional weight provides better damping effect, making the action of the steering piece 5 more stable and decisive, reducing the possibility of false operation.

[0070] According to some embodiments of the present application, as shown in Figure 1 、 Figures 3-7 illustrated, the third section 50 is further provided with a counterweight 500; the counterweight 500 is arranged close to the rotation axis L1.

[0071] In actual application, when the wind acts on the fourth section 51, the main additional mass (i.e. the counterweight 500) is close to the rotation center, so that the moment of inertia of the steering piece 5 is reduced. This makes the steering piece 5 more rapid and sensitive in starting and stopping when responding to changes in wind, reducing the action delay. When the wind weakens or disappears, the whole gravity center is still on the side close to the third section 50 of the rotation axis L1, so that the steering piece 5 can reliably recover to the default open state of the third section 50 drooping under the action of the gravity moment. Since the counterweight 500 is close to the fulcrum, the inertial swing generated during the recovery process is small, and the state conversion is more stable.

[0072] By setting the counterweight, the center of gravity of the steering piece 5 is close to the rotation axis L1, the rotational inertia is reduced, the steering piece 5 responds more agilely to changes in wind direction and wind force, and can form or release the lapping state with the baffle 2 faster, thereby improving the adaptability of the heat dissipation auxiliary device in a variable wind field. The center of gravity close to the axis makes the movement of the steering piece 5 in the starting and resetting process more controllable, and suppresses unnecessary oscillation or overshoot phenomenon, thereby enhancing the stability and reliability of the work. The counterweight 500 is a module independent of the body of the steering piece 5, allowing fine calibration of the dynamic performance of the steering piece 5 in the field by adjusting its mass or installation position to achieve the best working state.

[0073] In the implementation process, a set of standardized counterweights with different masses can be designed, which can be easily plugged and unplugged. The installation personnel can select the most suitable counterweight for installation according to the specific environment of the transmitter 1 (such as wind port, valley gust zone or plain zone).

[0074] According to some embodiments of the present application, optionally, as shown in Figures 1-9 The baffle 2 is further provided with a closing piece 22, the closing piece 22 is hinged with the baffle 2 and can rotate around the length direction of the transmitter 1; the steering piece 5 is configured to be driven by the airflow to rotate to the lapping of the free end of the fourth section 51 with the closing piece 22; the closing piece 22 is configured to rotate to the lapping of the top end with the heat dissipation surface 10 to block the airflow into the flow guide cavity 4 when the airflow and the thrust of the steering piece 5 reach a threshold.

[0075] In actual application, under common wind speed, the steering piece 5 is driven by the airflow, the free end of the fourth section 51 rotates and laps with the closing piece 22, and the device is in the flow guiding and heat dissipation state. When the wind speed increases to a certain threshold, the wind pressure acting on the steering piece 5 is large, at this time, the free end of the fourth section 51 is no longer used for flow guiding, but pushes the closing piece 22 to rotate around the hinge shaft. The closing piece 22 is driven by the airflow and the thrust of the steering piece 5 to rotate upward (or inward) until the top end is tightly lapped with the heat dissipation surface 10 of the transmitter 1. Once the closing piece 22 is lapped with the heat dissipation surface 10, the entrance of the flow guide cavity 4 is completely closed, and the path of the external airflow (especially the strong wind carrying high concentration of dust) into the flow guide cavity 4 and impacting the heat dissipation port 11 is completely blocked.

[0076] The short wave amplitude modulation broadcast transmitter heat dissipation auxiliary device provided by the present application gives priority to heat dissipation under normal conditions, and automatically switches to a sealed protection mode under extreme wind and sand conditions, thereby improving the survival ability and reliability of the transmitter 1 in harsh environments. The switching of the mode is completely triggered passively by the environmental parameter of wind pressure, without the need for sensors, controllers or external energy sources. The triggering threshold is determined by the structure, weight and hinge friction of the steering piece 5 and the closing piece 22, and the mechanism is simple, reliable and easy to maintain.

[0077] In the implementation process, the heat dissipation surface 10 can be composed of the end surfaces of multiple heat dissipation fins, and the top end of the closure 22 can be provided with multiple vertical teeth capable of being inserted into the gaps between the heat dissipation fins, so as to avoid the airflow carrying more dust from entering the flow guide cavity 4.

[0078] At the contact edge where the closure 22 and the heat dissipation surface 10 overlap, a flexible sealing strip (such as rubber or silicone) can be wrapped or embedded. This can improve the air tightness in the fully sealed mode and block fine dust.

[0079] According to some embodiments of the present application, as shown in Figures 3-12 The rotation axis L2 of the closure 22 divides it into a fifth segment 220 and a sixth segment 221 on both sides of the axis; the fourth segment 51 can overlap the fifth segment 220, and the free end of the sixth segment 221 can overlap 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 the rotation axis L2 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.

[0080] In actual application, under no wind or normal wind speed, the magnet blocks 23 installed on the baffle 2 and the free end of the sixth segment 221 of the closure 22 attract each other. This magnetic attraction provides an additional torque for the closure 22, which stably keeps it in the open position, effectively preventing misoperation caused by slight vibration or slight wind force, and ensuring the stable ventilation and heat dissipation of the flow guide cavity 4 under normal conditions. When strong wind drives the fourth segment 51 of the deflector 5 to rotate and pushes the fifth segment 220 of the closure 22 with its free end, the deflector 5 must exert sufficient pushing force to overcome the attractive force between the magnet blocks 23 and the inertia of the closure 22 itself. Once the attraction between the magnet blocks 23 is broken and pushed away to a distance where the magnetic force significantly decays, the resistance instantaneously decreases significantly. At this time, the closure 22 becomes extremely easy to be pushed further, and the system energy is converted from overcoming the magnetic force to driving the closure 22 to rotate quickly. Under the combined driving of the lever force saving effect and wind pressure, the free end of the sixth segment 221 of the closure 22 quickly rotates inward and tightly overlaps the heat dissipation surface 10. At this time, the originally mutually attractive magnet blocks 23 have been separated far apart, and their influence can be ignored, and the stability of the seal is maintained by the structural overlap and wind pressure.

[0081] Moreover, after the deflector 5 pushes the magnet blocks 23 on the closure 22 and the baffle 2 apart, the closure 22 can continue to rotate under the inertia and the blowing of the airflow until the free end of the sixth segment 221 contacts the heat dissipation surface 10, while the free end of the fourth segment 51 separates from the fifth segment 220, and the airflow can pass through the opening formed on the baffle 2 after the closure 22 rotates, on the one hand pushing the closure 22 to tightly contact the heat dissipation surface 10, and on the other hand avoiding damage to the deflector 5 and the baffle 2 under strong and continuous wind pressure.

[0082] The introduction of the magnet block 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, improving the anti-interference ability and working reliability of the system. The 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, instantly completing the closing action and shortening the exposure time in harsh conditions.

[0083] According to some embodiments of the present application, as shown in Figures 1-9 Optionally, as shown in the figure, it also includes a plurality of guide plates 6, which are arranged in the guide cavity 4 and are arranged along the length direction of the transmitter 1, and are connected between the heat dissipation surface 10 and the baffle 2; in the length direction of the transmitter 1, the edge of the heat dissipation opening 11 exceeds any guide plate 6.

[0084] In actual application, a plurality of guide plates 6 are installed in the guide cavity 4. These guide plates 6 divide the guide cavity 4 into a plurality of continuous flow channels in the length direction of the transmitter 1. When the airflow is introduced into the guide cavity 4 by the deflector 5, these guide plates 6 play a role in combing and guiding the airflow, forcing the airflow to flow in the flow channels formed by the guide plates 6, reducing the transverse movement and disordered vortex of the airflow. This ensures that the airflow can more evenly cover and flow through different areas of the entire heat dissipation surface 10. Since the edge of the heat dissipation opening 11 exceeds any guide plate 6 in the length direction of the transmitter 1, it means that the arrangement of the guide plate 6 does not block any heat dissipation opening 11. All heat dissipation openings 11 are completely exposed to the orderly organized airflow guided by the guide plate 6, ensuring that the heat dissipation area is fully utilized.

[0085] The guide plate 6 eliminates the dead zone or low-speed zone that may exist on the heat dissipation surface 10, forcing the airflow to more evenly scour all heat dissipation openings 11, avoiding local overheating and improving overall heat dissipation performance. The guide plate 6 connected between the heat dissipation surface 10 and the baffle 2 plays a role similar to a rib plate or support rib, enhancing the mechanical strength and stiffness of the entire guide cavity 4 assembly, making it more capable of withstanding wind load and vibration, improving the stability and life of the device. The orderly airflow organization reduces flow loss, so that at the same external wind speed, more effective wind volume is involved in heat dissipation, improving the utilization efficiency of the airflow.

[0086] According to some embodiments of the present application, as shown in Figures 1-9 Optionally, as shown in the figure, in the height direction of the transmitter 1, the top end of the guide plate 6 extends beyond the baffle 2 and the heat dissipation surface 10; and the top end of the guide plate 6 is in an arc structure.

[0087] In practical application, the deflector 6 extends upward in the height direction of the transmitter 1, and the top end thereof exceeds not only the heat dissipation surface 10 but also the baffle 2. These protruding parts form a row of arc-shaped wings arranged along the length direction of the transmitter 1. When the airflow (especially raindrops) approaches the transmitter 1 from above, these protruding arc-shaped structures first contact the airflow, and can effectively guide and divert the airflow and impurities (such as rainwater and large leaves) to the two sides, forming a protective umbrella effect and reducing the probability of falling directly on the top opening between the baffle 2 and the heat dissipation surface 10. The arc-shaped design makes the diversion process very smooth, and almost no additional wind noise and vortexes are generated.

[0088] The protruding arc-shaped top end provides a physical barrier for the top opening of the deflector cavity 4, and improves the defense capability of the device against precipitation, dust and impurities from above. The deflector 6 protruding at the top can comb the transverse airflow coming from above, so that it leaves the device area more orderly, reducing the turbulence that may be formed at the top, which helps to maintain the stability of the turning piece 5.

[0089] In the specific implementation process, as shown in Figures 1-9 a cover plate 7 can be arranged above the deflector 6 and adapted to the shape of the arc-shaped structure of the deflector 6, and there is a gap between the cover plate 7 and the plane formed by the arc-shaped structure of the top end of the plurality of deflectors 6, through which the transverse airflow can pass. On the one hand, the cover plate 7 can more effectively block rainwater, leaves, birds and animals and other impurities from entering the deflector cavity 4, and on the other hand, the narrow gap formed by the cover plate 7 and the top end of the deflector 6 accelerates the flow rate of the natural wind passing through this gap, so that the hot air between the deflectors 6 is easily separated from the deflector cavity 4 along with the accelerated transverse airflow, and the heat exchange efficiency is accelerated.

[0090] Although the present application has been described with reference to the preferred embodiments, various modifications can be made to it without departing from the scope of the present application, and equivalent components can be substituted therefor. In particular, the technical features mentioned in each embodiment can be combined in any way as long as there is no structural conflict. The present 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, include: A baffle is disposed opposite to the heat dissipation surface; A pair of connectors are arranged opposite each other along the length 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 connectors together form a flow guide cavity, and the heat dissipation port is located in the flow guide cavity; A steering component, hinged to a pair of said connecting components, is capable of rotating about the length of the transmitter; The baffle is divided into a first section and a second section 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 less than the distance between the second segment and the heat dissipation surface, and the first segment and the second segment have a smooth transition; Along the height direction 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 to its top end and engage with the baffle, thereby directing airflow toward the baffle into the flow guide cavity and blocking airflow toward the heat dissipation surface.

2. The heat dissipation auxiliary device for a shortwave amplitude modulation broadcast transmitter according to claim 1, characterized in that, 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. Furthermore, the distance from the rotation axis L1 to the third free end is less than the distance from it to the fourth free end.

3. The heat dissipation auxiliary device for a shortwave amplitude modulation broadcast transmitter according to claim 2, characterized in that, The weight of the third segment is greater than the weight of the fourth segment.

4. The heat dissipation auxiliary device for a shortwave amplitude modulation broadcast transmitter according to claim 3, characterized in that, The third section is also equipped with a counterweight; The counterweight is positioned close to the rotation axis L1.

5. The heat dissipation auxiliary device for a shortwave amplitude modulation broadcast transmitter according to claim 3, characterized in that, The baffle is also provided with a closing member, which is hinged to the baffle and can rotate around the length direction of the transmitter. The steering component is configured to be driven by airflow to rotate until the free end of the fourth segment overlaps with the closure component; The closure is configured to rotate to its top end to overlap with the heat dissipation surface when the thrust from the airflow and the deflector reaches a threshold, thereby blocking the airflow from entering the guide cavity.

6. The heat dissipation auxiliary device for a shortwave amplitude modulation broadcast transmitter according to claim 5, characterized in that, The rotation axis L2 of the closure divides it into the fifth and sixth segments 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 sixth free end is less than the distance from it to the fifth free end; The baffle and the free end of the sixth segment are respectively provided with mutually attractive magnet blocks.

7. A short wave amplitude modulation broadcast transmitter heat sink auxiliary device as claimed in claim 1, wherein, Also includes: a plurality of baffles arranged along the length of the transmitter and connecting the heat sink surface and the baffle; in the length direction of the transmitter, the edge of the heat sink opening extends beyond any of the baffles.

8. The short wave amplitude modulation broadcast transmitter heat sink auxiliary device according to claim 7, characterized in that, in the height direction of the transmitter, the top end of the baffle extends beyond the baffle and the heat sink surface; and the top end of the baffle is an arc structure.

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