A directional sound used in an exhibition hall

Abstract

The utility model provides a kind of directional sound used in exhibition hall, it is related to directional sound technical field, including directional sound main part, four corners in the inside of directional sound main part are respectively equipped with spiral aluminium pipe, double-layer frame is provided in the inside of directional sound main part, the part of backplate of directional sound main part is set in top end position and is provided with radiating fin;Airflow path is extended using oblique spiral aluminium pipe, heat air is discharged in combination with taper structure to accelerate, heat dissipation efficiency is significantly improved, power amplifier chip temperature is reduced by more than 30%, avoid the deterioration of sound quality or equipment damage due to overheating, heat pipe is directly attached power amplifier chip, branch heat pipe quickly conducts heat to fin and spiral aluminium pipe, realize multi-path collaborative heat dissipation, ensure that still can work stably under high temperature environment, adjust fin angle by micro steering gear simultaneously, optimize airflow direction, further improve heat dissipation performance, avoid noise interference simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of directional sound technology, and in particular to a directional sound system used in exhibition halls. Background Technology

[0002] Directional speakers are audio devices that can concentrate sound wave energy to propagate in a specific direction. They are widely used in museums, exhibition halls, shopping malls, theme parks and other scenarios to achieve regional sound coverage and avoid noise interference with adjacent exhibition areas.

[0003] With increasing usage frequency and rising ambient temperatures, current directional speakers exhibit significant shortcomings in heat dissipation, leading to overheating after prolonged operation and impacting sound quality and equipment lifespan. Furthermore, some existing directional speakers suffer from deficiencies in signal processing and stability, making them susceptible to electromagnetic interference, resulting in unstable audio quality and even connection drops, severely disrupting the audience experience. Existing solutions are insufficient to fully meet practical needs, especially in high-temperature and complex electromagnetic environments. Current cooling system designs are often too simplistic and ineffective in managing the heat generated during extended continuous operation. Therefore, we propose a directional speaker design for use within exhibition halls. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies. With increasing usage frequency and rising ambient temperatures, current directional speakers exhibit significant deficiencies in heat dissipation, leading to overheating after prolonged operation, affecting sound quality and equipment lifespan. Furthermore, some existing directional speakers suffer from deficiencies in signal processing and stability, making them susceptible to electromagnetic interference, resulting in unstable audio quality and even connection drops, severely disrupting the audience's experience. Existing solutions are insufficient to fully meet practical needs, especially in high-temperature and complex electromagnetic environments. Existing heat dissipation systems are often overly simplistic and unable to effectively address the heat generated during prolonged continuous operation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A directional speaker for use in exhibition halls includes a directional speaker body, with spiral aluminum tubes installed at the four corners inside the directional speaker body, a double-layer frame inside the directional speaker body, and heat dissipation fins installed on the back panel of the directional speaker body near the top.

[0007] Furthermore, the outer wall of the spiral aluminum tube is filled with sound-absorbing cotton between it and the inner wall of the directional speaker body. The bottom of the spiral aluminum tube is connected to the air inlet of the directional speaker body, and the spiral aluminum tube extends obliquely to the exhaust port at the top of the directional speaker body.

[0008] Furthermore, the double-layer frame consists of an outer frame and an inner frame, with the inner frame installed inside the outer frame.

[0009] Furthermore, a rectangular frame is provided at the top of the outer frame, and a composite plate is provided at the bottom of the outer frame. Four reinforcing ribs are arranged diagonally between the rectangular frame and the composite plate. The four reinforcing ribs connect the four corners of the rectangular frame and the composite plate. The rectangular frame is fixedly installed against the inner wall of the directional speaker body. Aluminum tube slots are opened at the four corners of the rectangular frame, and the spiral aluminum tube passes through the aluminum tube slots.

[0010] Furthermore, the inner frame is provided with horizontal frames at both the top and bottom, vertical columns are installed at the four corners of the two horizontal frames, silicone columns are installed at the nodes of the two horizontal frames, and several annular slots are installed on the inner wall of the outer frame, with the silicone columns inserted into the annular slots.

[0011] Furthermore, a heat pipe is installed on the inner wall of the directional speaker body along the long side of the directional speaker body, close to the position of the power amplifier chip, and three branch heat pipes branch out from the end of the heat pipe.

[0012] Furthermore, a micro servo motor is installed at one end of the heat dissipation fin, and the micro servo motor drives the heat dissipation fin to rotate at an angle of 0°-90°.

[0013] Furthermore, the surface of the spiral aluminum tube is coated with a nano-graphene coating, and the spiral thread of the spiral aluminum tube has a spiral tapering shape from bottom to top.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. By extending the airflow path with an oblique spiral aluminum tube and combining it with a tapered structure to accelerate the exhaust of hot air, the heat dissipation efficiency is significantly improved, reducing the temperature of the power amplifier chip by more than 30%. This avoids sound quality degradation or equipment damage caused by overheating. The heat pipe is directly attached to the power amplifier chip, and the branch heat pipes quickly conduct heat to the fins and spiral aluminum tube, achieving multi-path collaborative heat dissipation. This ensures stable operation even in high-temperature environments. At the same time, the fin angle is adjusted by a micro servo motor to optimize the airflow direction, further improving heat dissipation performance while avoiding noise interference.

[0016] 2. The outer frame is fixed to the shell, and the inner frame is supported by silicone pillars, which effectively isolates the speaker vibration, reduces the impact of structural resonance on sound quality, and reduces total harmonic distortion to <1%; four diagonal reinforcing ribs enhance the overall rigidity, prevent screws from loosening or welds from cracking due to vibration, and extend the equipment's lifespan. Attached Figure Description

[0017] Figure 1A schematic diagram of the overall structure of a directional sound system used in an exhibition hall, provided by this utility model;

[0018] Figure 2 A schematic diagram of the back structure of a directional speaker used in an exhibition hall, provided for the purposes of this utility model;

[0019] Figure 3 A schematic diagram of a spiral aluminum tube structure for a directional sound system used in an exhibition hall, provided by this utility model;

[0020] Figure 4 A schematic diagram of a double-layer frame structure for a directional sound system used in an exhibition hall, provided by this utility model.

[0021] Illustration: 1. Main body of directional speaker; 2. Double-layer frame; 101. Spiral aluminum tube; 102. Heat dissipation fins; 201. Outer frame; 202. Inner frame; 203. Rectangular frame; 204. Composite board; 205. Reinforcing rib; 206. Aluminum tube slot; 207. Horizontal frame; 208. Vertical column; 209. Silicone column. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be provided below with reference to relevant embodiments, and several embodiments of this utility model will be given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this utility model more thorough and complete.

[0024] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0025] 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 invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] Example 1

[0027] like Figure 1-4 As shown, this utility model provides a technical solution: a directional speaker for use in exhibition halls, including a directional speaker body 1, with spiral aluminum tubes 101 installed at the four corners inside the directional speaker body 1. The spiral aluminum tubes 101 are hidden in the four corners of the directional speaker body 1, without occupying acoustic cavity space, and the overall volume is reduced compared to traditional directional speakers. The directional speaker body 1 is provided with a double-layer frame 2 inside, and heat dissipation fins 102 are provided on the back plate of the directional speaker body 1 near the top. The heat dissipation fins 102 can automatically adjust the angle according to the ambient temperature to balance heat dissipation efficiency and energy consumption.

[0028] Example 2

[0029] like Figure 1-4 As shown, the outer wall of the spiral aluminum tube 101 and the inner wall of the directional speaker body 1 are filled with sound-absorbing cotton. The bottom of the spiral aluminum tube 101 is connected to the air inlet of the directional speaker body 1. The spiral aluminum tube 101 extends obliquely to the exhaust port at the top of the directional speaker body 1. The bottom inlet end of the spiral aluminum tube 101 directly contacts the main heat-generating components inside the speaker, such as the power amplifier chip and the back of the driver unit. Heat is quickly absorbed through the high thermal conductivity of aluminum. The surface of the spiral aluminum tube 101 is coated with a nano-graphene coating, which increases the heat conduction area. The spiral aluminum tube 101 has a spiral tapering shape from bottom to top. By utilizing the principle of natural rise of hot air, a continuous airflow is formed. Cold air is drawn in from the hidden air inlet at the bottom and absorbs heat when it flows through the inner wall of the high-temperature aluminum tube. The hot air is accelerated to be discharged at the top outlet. The tapering structure increases the flow rate.

[0030] The double-layer frame 2 consists of an outer frame 201 and an inner frame 202. The inner frame 202 is installed inside the outer frame 201. A rectangular frame 203 is provided at the top of the outer frame 201, and a composite plate 204 is provided at the bottom of the outer frame 201. Four reinforcing ribs 205 are arranged diagonally between the rectangular frame 203 and the composite plate 204, and the four reinforcing ribs 205 connect the four corners of the rectangular frame 203 and the composite plate 204. The rectangular frame 203 is fixedly installed against the inner wall of the directional speaker body 1. Each of the four corners of the rectangular frame 203 has an aluminum tube slot 206 for screws. The aluminum tube 101 passes through the aluminum tube slot 206. Horizontal frames 207 are provided at the top and bottom of the internal frame 202. Vertical columns 208 are installed at the four corners of the two horizontal frames 207. Silicone columns 209 are installed at the nodes of the two horizontal frames 207. Several annular slots are installed on the inner wall of the outer frame 201, and the silicone columns 209 are inserted into the annular slots. When the silicone column 209 vibrates horizontally, it can absorb energy through silicone shear deformation; when it vibrates vertically, the silicone is compressed and buffered. The natural frequency is designed to be below 20Hz.

[0031] A heat pipe is installed on the inner wall of the directional speaker body 1 along the long side of the directional speaker body 1, close to the position of the power amplifier chip. Three branch heat pipes branch off from the end of the heat pipe. The main heat pipe and the branch heat pipes are laser-welded into a Y-shaped structure. The inside is pre-filled with nano-fluid working fluid. The branch heat pipes extend to the top fin group for priority heat dissipation. Spiral aluminum tubes 101 on both sides assist in heat dissipation. In the bottom pre-cooling area, a micro servo is installed at one end of the heat dissipation fin 102, which utilizes the air intake airflow. The micro servo drives the heat dissipation fin 102 to rotate at an angle of 0°-90°, which is automatically adjusted according to the ambient temperature.

[0032] The working process of this utility model is as follows: When using a directional speaker for use in an exhibition hall, the heat generated by the power amplifier chip, driver unit and other heat-generating components is first transferred to the bottom inlet end of the spiral aluminum tube 101 through direct contact, and the nano-graphene coating on the surface of the aluminum tube further improves the heat conduction efficiency.

[0033] External cold air enters the spiral aluminum tube 101 through the hidden air inlet at the bottom; the airflow rises along the oblique spiral tapering pipe and fully contacts the inner wall of the high-temperature aluminum tube to absorb heat; the tapering structure accelerates the airflow, and the hot air is concentrated and discharged from the top exhaust port, forming continuous convection; the sound-absorbing cotton between the outer wall of the aluminum tube and the inner wall of the speaker effectively suppresses airflow noise.

[0034] The power amplifier chip's heat is quickly dissipated through the main heat pipe that is close to its surface; the branch heat pipes transfer the heat to the top fin assembly, the spiral aluminum tubes 101 on both sides, and the bottom pre-cooling area respectively; the micro servo drives the heat dissipation fins 102 to rotate within the range of 0°-90° according to the temperature sensor signal, optimizing the direction of heat dissipation airflow.

[0035] The vibrations of the speaker and amplifier module are transmitted to the horizontal frame 207 and vertical column 208 of the internal frame 202; the silicone column 209 absorbs the horizontal vibration energy through shear deformation and compresses and buffers the vertical vibration; the rectangular frame 203, composite plate 204 and four diagonal reinforcing ribs 205 of the external frame 201 form a three-dimensional truss, which improves the overall torsional resistance. Heat is conducted to the spiral aluminum tube 101 through the aluminum tube slot 206 of the external frame 201, while vibration is isolated by the silicone column 209 to avoid mutual interference. The nano-graphene coating on the surface of the spiral aluminum tube 101 absorbs electromagnetic interference and protects the stability of audio signal transmission.

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

Claims

1. A directional sound used in an exhibition hall, comprising a directional sound main body (1), characterized in that: Spiral aluminum tubes (101) are installed at the four corners inside the directional speaker body (1). A double-layer frame (2) is set inside the directional speaker body (1). Heat dissipation fins (102) are set on the back plate of the directional speaker body (1) near the top.

2. The directional sound system for use in an exhibition hall according to claim 1, characterized in that: The outer wall of the spiral aluminum tube (101) and the inner wall of the directional speaker body (1) are filled with sound-absorbing cotton. The bottom of the spiral aluminum tube (101) is connected to the air inlet of the directional speaker body (1). The spiral aluminum tube (101) extends obliquely to the exhaust port at the top of the directional speaker body (1).

3. The directional sound system for use in an exhibition hall according to claim 1, wherein: The double-layer frame (2) consists of an outer frame (201) and an inner frame (202), with the inner frame (202) installed inside the outer frame (201).

4. The directional sound system for use in an exhibition hall according to claim 3, wherein: The top of the outer frame (201) is provided with a rectangular frame (203), and the bottom of the outer frame (201) is provided with a composite plate (204). Four reinforcing ribs (205) are arranged diagonally between the rectangular frame (203) and the composite plate (204). The four reinforcing ribs (205) connect the four corners of the rectangular frame (203) and the composite plate (204). The rectangular frame (203) is fixedly installed against the inner wall of the directional speaker body (1). Aluminum tube slots (206) are opened at the four corners of the rectangular frame (203), and the spiral aluminum tube (101) passes through the aluminum tube slots (206).

5. The directional sound system for use in an exhibition hall according to claim 3, wherein: The inner frame (202) is provided with horizontal frames (207) at both the top and bottom. Vertical columns (208) are installed at the four corners of the two horizontal frames (207). Silicone columns (209) are installed at the nodes of the two horizontal frames (207). Several annular slots are installed on the inner wall of the outer frame (201), and the silicone columns (209) are inserted into the annular slots.

6. The directional sound system for use in an exhibition hall according to claim 1, wherein: A heat pipe is installed on the inner wall of the directional speaker body (1) along the long side of the directional speaker body (1) close to the position of the power amplifier chip, and three branch heat pipes are branched out from the end of the heat pipe.

7. The directional sound system for use in an exhibition hall according to claim 1, wherein: A micro servo motor is installed at one end of the heat dissipation fin (102), and the micro servo motor drives the heat dissipation fin (102) to rotate at an angle of 0°-90°.

8. The directional sound system for use in an exhibition hall according to claim 1, wherein: The surface of the spiral aluminum tube (101) is coated with a nano-graphene coating, and the thread of the spiral aluminum tube (101) is a spiral tapering shape from bottom to top.

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