A silenced hot air gun

Abstract

This utility model relates to a silencer hot air gun, belonging to the technical field of hot air guns. It includes a hot air gun body and an air outlet fixedly connected to one side of the hot air gun body. A silencer component is provided at the end of the air outlet furthest from the hot air gun body, and a wind-force buffer component for stabilizing airflow is provided outside the air outlet. The silencer component includes a tapered tube fixedly connected to the end of the air outlet furthest from the hot air gun body, and a throat tube is fixedly connected to the left end of the tapered tube. This silencer hot air gun, by adopting a tapered tube, throat tube, and diffuser tube structure in its silencer component, utilizes the pressure and velocity changes of the airflow in the pipe to reduce radiated noise. The self-rotating buffer of the airflow vane makes the airflow more stable and uniform, avoiding the impact of airflow turbulence on the silencer effect, effectively improving the working environment, reducing damage to the operator's hearing, and achieving the advantages of good noise reduction and high user comfort.

Description

Technical Field

[0001] This utility model relates to the field of hot air gun technology, specifically a silent hot air gun. Background Technology

[0002] A hot air gun is a tool that uses hot air blown from a heating element to solder and remove components. It's very common in our daily lives, used for things like heat shrinking small electronic components such as capacitors and wire terminals after they've been encased in tubing; heating and molding PVC, PE, and fiberglass materials; connecting or shrinking tubes of similar materials; and heating plastic tubes for bending or softening. It's also used in the automotive window tinting industry.

[0003] A hot air gun is needed in the industrial hot air heating process. Chinese utility model patent with announcement number CN217178892U discloses a hot air gun structure with stable temperature, including a hot air gun body. The hot air gun body is provided with an air outlet. A height limiting branch pipe is coaxially installed on the air outlet. The height limiting branch pipe is sleeved on the air outlet, and the length of the height limiting branch pipe is set to 30-50mm.

[0004] However, the direct-blowing structure of the hot air gun body of this utility model causes severe turbulence, which generates significant radiated noise. Long-term use can lead to occupational hearing damage. Furthermore, the airflow pressure fluctuations cause airflow backlash, which intensifies the vibration of the handle. Therefore, a silencer hot air gun is proposed to solve the problems mentioned above. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a silent hot air gun with advantages such as good noise reduction effect and high user comfort. It solves the problems of the direct-blowing structure of the main body of existing hot air guns, which causes violent turbulence and generates large radiated noise, leading to occupational hearing damage with long-term use, and the increased vibration of the handle due to airflow back force caused by airflow pressure fluctuations.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A silencer hot air gun includes a hot air gun body and an air outlet fixedly connected to one side of the hot air gun body. A silencer component is provided at the end of the air outlet away from the hot air gun body, and a wind buffer component for stabilizing airflow is provided on the outside of the air outlet.

[0008] The silencing assembly includes a tapered tube fixedly connected to the end of the air outlet away from the hot air gun body, the left end of the tapered tube being fixedly connected to a throat tube, and the left end of the throat tube being fixedly connected to a diffuser tube.

[0009] The wind buffer assembly includes a rotating shaft rotatably connected inside the throat, and a wind vane is fixedly connected to the outside of the rotating shaft.

[0010] Furthermore, the outer diameter of the air outlet nozzle is adapted to the inner diameter of the tapered tube, and the tapered tube is sleeved on the outside of the air outlet nozzle.

[0011] Furthermore, the throat is a hollow cylinder, and a number of heat dissipation fins are fixedly connected to the outside of the throat. The heat dissipation fins are arranged in a ring shape on the outside of the throat.

[0012] Furthermore, the external thread of the tapered tube is connected to a locking bolt extending into it, with the end of the locking bolt away from the tapered tube abutting against the outer wall of the air outlet.

[0013] Furthermore, the number of locking bolts is four, and the four locking bolts are arranged in a ring shape on the outside of the tapered tube.

[0014] Furthermore, the wind vane is rotatably connected to the inside of the throat, and the outer diameter of the wind vane is adapted to the inner diameter of the throat.

[0015] Furthermore, the outside of the diffuser is provided with a pulley assembly for assisting movement. The pulley assembly includes an abutment spring fixedly connected to the left end of the diffuser. A connecting ring is fixedly connected to the end of the abutment spring away from the diffuser. A hinge seat is fixedly connected to the side of the connecting ring away from the abutment spring. An auxiliary wheel is rotatably connected inside the hinge seat.

[0016] Furthermore, the number of the abutment spring, the hinge seat, and the auxiliary wheel are all four sets, and the four sets of the hinge seat and the auxiliary wheel are distributed in a ring shape on the outside of the connecting ring.

[0017] Compared with the prior art, the present invention provides a silent hot air gun, which has the following beneficial effects:

[0018] 1. This silencer hot air gun uses a structure of tapered tube, throat tube, and diffuser tube in its silencer components to reduce radiated noise by utilizing changes in air pressure and velocity in the pipe. The self-rotating buffer of the airflow vane makes the airflow more stable and uniform, avoiding the impact of airflow turbulence on the silencer effect. This effectively improves the working environment, reduces damage to the operator's hearing, and achieves the advantages of good noise reduction effect and high user comfort.

[0019] 2. This silenced hot air gun features ring-shaped heat dissipation fins, increasing the contact area between the throat and the air. This allows for rapid heat dissipation from the throat, reducing its temperature and improving the reliability and lifespan of the hot air gun. The addition of a pulley assembly makes the hot air gun easier to move and operate during use, reducing the operator's workload and increasing work efficiency, thus achieving strong practicality. Attached Figure Description

[0020] Figure 1 This is a three-dimensional view of the structure of this utility model;

[0021] Figure 2 This is a three-dimensional structural view of the noise reduction component, heat dissipation fins, and pulley assembly of this utility model;

[0022] Figure 3 This is a three-dimensional cross-sectional view of the structure of the noise reduction component and the wind-force buffer component of this utility model;

[0023] Figure 4 This is a three-dimensional structural view of the pulley assembly of this utility model.

[0024] In the diagram: 1. Hot air gun body; 2. Air nozzle; 3. Converging tube; 4. Throat; 5. Diverging tube; 6. Rotating shaft; 7. Air vane; 8. Heat dissipation fins; 9. Locking bolt; 10. Abutment spring; 11. Connecting ring; 12. Hinge seat; 13. Auxiliary wheel. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1 to 4 A silencing hot air gun in this embodiment includes a hot air gun body 1 and an air outlet 2 fixedly connected to one side of the hot air gun body 1. A silencing component is provided at the end of the air outlet 2 away from the hot air gun body 1, and a wind buffer component for stabilizing airflow is provided on the outside of the air outlet 2. The silencing component includes a tapered tube 3 fixedly connected to the end of the air outlet 2 away from the hot air gun body 1. A throat 4 is fixedly connected to the left end of the tapered tube 3, and a diffuser 5 is fixedly connected to the left end of the throat 4.

[0027] The outer diameter of the air outlet 2 is matched with the inner diameter of the tapered tube 3, and the tapered tube 3 is sleeved on the outside of the air outlet 2.

[0028] Specifically, the throat 4 is a hollow cylinder, and a number of heat dissipation fins 8 are fixedly connected to the outside of the throat 4. The heat dissipation fins 8 are arranged in a ring shape on the outside of the throat 4. By setting the heat dissipation fins 8 in a ring shape, the contact area between the throat 4 and the air is increased, which can quickly dissipate the heat inside the throat 4, reduce the temperature of the throat 4, and improve the reliability and service life of the hot air gun.

[0029] It should be noted that the external threaded connection of the converging tube 3 has locking bolts 9 extending into it. The end of the locking bolt 9 away from the converging tube 3 abuts against the outer wall of the air outlet 2. There are four locking bolts 9, arranged in a ring shape on the outside of the converging tube 3. When the hot air gun body 1 generates hot air, the hot air is blown outward through the air outlet 2. The hot air enters the silencer assembly and first passes through the converging tube 3. The diameter of the converging tube 3 gradually decreases, causing the hot air to flow faster and the pressure to decrease during its flow. Then, the hot air enters the throat 4, which is a hollow cylinder. The hot air maintains a high flow rate and low pressure within the throat 4, forming a stable airflow. Finally, the hot air enters the diffuser 5, whose diameter gradually increases. During its flow, the hot air gradually decreases in flow rate and gradually increases in pressure, returning to near atmospheric pressure. Through this gradually narrowing, equal-diameter, and gradually expanding structural design, the hot air achieves a smooth transition in pressure and flow rate within the silencing component, effectively reducing noise caused by sudden changes in airflow and achieving a silencing effect.

[0030] Please see Figure 3 In this embodiment, the wind buffer assembly includes a rotating shaft 6 rotatably connected inside the throat 4, and a wind vane 7 is fixedly connected to the outside of the rotating shaft 6.

[0031] The airflow vane 7 is rotatably connected inside the throat tube 4, and its outer diameter matches the inner diameter of the throat tube 4. When the hot air gun body 1 generates hot air, the hot air impacts the airflow vane 7 inside the throat tube 4, causing it to rotate around the rotation axis 6. The rotation of the airflow vane 7 buffers and guides the hot airflow, making the hot airflow pass through the throat tube 4 more smoothly and evenly, further stabilizing the airflow and reducing noise caused by airflow turbulence.

[0032] Please see Figures 1 to 4In this embodiment, a pulley assembly for assisting movement is provided on the outside of the diffuser tube 5. The pulley assembly includes an abutment spring 10 fixedly connected to the left end of the diffuser tube 5. A connecting ring 11 is fixedly connected to the end of the abutment spring 10 away from the diffuser tube 5. A hinge seat 12 is fixedly connected to the side of the connecting ring 11 away from the abutment spring 10. An auxiliary wheel 13 is rotatably connected inside the hinge seat 12. When using the hot air gun, the pulley assembly on the outside of the diffuser tube 5 functions. The auxiliary wheel 13 is rotatably connected to the connecting ring 11 via the hinge seat 12, and the abutment spring 10 provides elastic support for the auxiliary wheel 13. During operation, the auxiliary wheel 13 can roll along the working surface, reducing the friction between the hot air gun and the working surface, making the hot air gun easier to move and operate, and improving ease of use. At the same time, the elasticity of the abutment spring 10 ensures that the auxiliary wheel 13 is always in close contact with the working surface, providing stable support.

[0033] The number of abutment springs 10, hinge seats 12 and auxiliary wheels 13 are all four sets. The four sets of hinge seats 12 and auxiliary wheels 13 are distributed in a ring shape outside the connecting ring 11.

[0034] The working principle of the above embodiments is as follows:

[0035] In use, the hot air gun body 1 is activated by the controller to generate hot air, which is blown outward through the nozzle 2. The hot air enters the converging tube 3, where the flow rate increases and the pressure decreases due to the reduced diameter. It then enters the throat tube 4, where a high flow rate and low pressure are maintained to form a stable airflow. Finally, it enters the diverging tube 5, where the diameter increases, the flow rate decreases, and the pressure increases, approaching atmospheric pressure. This smooth transition in pressure and flow rate reduces noise. The hot air impacts the airflow vane 7 inside the throat tube 4, causing it to rotate around the rotating shaft 6, which buffers and guides the airflow, allowing it to pass through more smoothly and evenly, reducing turbulent noise. During operation, the auxiliary wheel 13 rolls along the working surface, reducing friction between the hot air gun and the surface, facilitating movement. The abutment spring 10 ensures that the auxiliary wheel 13 is in close contact with the workpiece surface, providing stable support.

[0036] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods, and any method that achieves the desired beneficial effect can be implemented. Furthermore, all electrical components in this embodiment are electrically connected to the main controller and power supply. The main controller can be a conventional, known device such as a computer that performs control functions. Those skilled in the art can control the electrical components through simple programming, and the existing disclosed power connection technologies are common knowledge in the field. Therefore, this embodiment will not elaborate further on their specific structural composition and working principles.

[0037] It should be noted that the orientations or positional relationships indicated herein are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the purpose of facilitating the description of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0039] 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 silencer hot air gun, characterized in that: It includes a hot air gun body and an air outlet fixedly connected to one side of the hot air gun body. A silencing component is provided at the end of the air outlet away from the hot air gun body, and a wind buffer component for stabilizing airflow is provided on the outside of the air outlet. The silencing assembly includes a tapered tube fixedly connected to the end of the air outlet away from the hot air gun body, the left end of the tapered tube being fixedly connected to a throat tube, and the left end of the throat tube being fixedly connected to a diffuser tube. The wind buffer assembly includes a rotating shaft rotatably connected inside the throat, and a wind vane is fixedly connected to the outside of the rotating shaft.

2. A sound attenuated hot air gun according to claim 1 wherein: The outer diameter of the air outlet nozzle is adapted to the inner diameter of the tapered tube, which is sleeved on the outside of the air outlet nozzle.

3. The sound attenuated hot air gun of claim 1 wherein: The throat is a hollow cylinder, and a number of heat dissipation fins are fixedly connected to the outside of the throat. The heat dissipation fins are arranged in a ring shape on the outside of the throat.

4. The sound attenuated hot air gun of claim 1 wherein: The external threaded connection of the tapered tube is a locking bolt extending into it, with the end of the locking bolt away from the tapered tube abutting against the outer wall of the air outlet.

5. A silencer hot air gun according to claim 4, characterized in that: The number of locking bolts is four, and the four locking bolts are arranged in a ring shape on the outside of the tapered tube.

6. The silencer hot air gun according to claim 1, characterized in that: The wind vane is rotatably connected to the inside of the throat, and the outer diameter of the wind vane is adapted to the inner diameter of the throat.

7. The silencer hot air gun according to claim 1, characterized in that: The outside of the diffuser is provided with a pulley assembly for assisting movement. The pulley assembly includes an abutment spring fixedly connected to the left end of the diffuser. A connecting ring is fixedly connected to the end of the abutment spring away from the diffuser. A hinge seat is fixedly connected to the side of the connecting ring away from the abutment spring. An auxiliary wheel is rotatably connected inside the hinge seat.

8. A silencer hot air gun according to claim 7, characterized in that: The number of abutment springs, hinge seats, and auxiliary wheels are all four sets, and the four sets of hinge seats and auxiliary wheels are distributed in a ring shape on the outside of the connecting ring.

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