Airflow accelerator for compressed air dryer

Abstract

The invention discloses an airflow accelerator for a compressed air dryer, and relates to the technical field of airflow adjusting.The airflow accelerator comprises an outer shell, a motor is assembled outside the outer shell, an air conveying pipe is arranged in the outer shell in a penetrating mode, a driving shaft of the motor is in transmission connection with an impeller located outside the air conveying pipe, and the airflow accelerator further comprises a reducing mechanism; the reducing mechanism comprises an accelerating pipe a slidably connected to the interior of the air conveying pipe, a telescopic assembly and a flow guide mechanism are arranged at the top of the accelerating pipe a, the flow guide mechanism comprises a top plate fixed between the inner wall of the outer shell and the outer wall of the air conveying pipe, and a plurality of accelerating pipes b communicating with the interior of the air conveying pipe are fixedly connected to the air conveying pipe; the length of the telescopic assembly can be adaptively adjusted along with the change of the flow velocity of the airflow, so that the device is suitable for the airflow at different flow velocities, the flow velocity of the airflow and energy loss in the acceleration process are balanced, unnecessary energy loss is avoided, and the acceleration effect of the airflow is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of airflow regulation, and in particular to an airflow accelerator for a compressed air dryer. Background Art

[0002] A compressed air dryer is a device used to remove moisture from compressed air. Common compressed air dryers include refrigerated compressed air dryers and adsorption compressed air dryers. The adsorption compressed air dryer uses the principle of pressure swing adsorption. When in use, wet air passes through the adsorbent, and the moisture is adsorbed by the adsorbent to obtain dry air. The airflow accelerator is a device that assists the dryer in rapid drying. It can speed up the flow of air in the dryer, thereby increasing the air drying rate and shortening the time required for air drying.

[0003] A traditional airflow accelerator is mainly composed of a shell, a fan and an air outlet pipe. The shell is hollow and has two air inlets and one air outlet. The two ends of the air outlet pipe are respectively connected to the air outlet and the air supply pipe of the dryer. The fan is installed in one of the air inlets. The suction force generated by the dryer during operation draws the outside air into the shell from the air inlet where the fan is not installed, and then draws it into the air supply pipe of the dryer through the air outlet pipe. In this process, the airflow generated by the fan accelerates the air passing through the shell, so that the air quickly enters the dryer, thereby accelerating the drying rate of the air.

[0004] In order to accelerate the airflow, the diameter of the air outlet end of the air outlet pipe will be smaller than the air inlet end, and the two ends are connected by a reducer. The air outlet pipe of the existing airflow accelerator is an integrally molded casting, and the specifications of the reducer are fixed, which cannot be applied to airflows of different speeds. When the airflow velocity is too fast, the airflow is likely to cause greater pressure fluctuations and turbulence when passing through the reducer, increasing the energy loss of the airflow flow, thereby reducing the acceleration effect of the airflow. Summary of the invention

[0005] The purpose of the present invention is to propose an air flow accelerator for a compressed air dryer to solve the problem that the air outlet pipe of the existing air flow accelerator is an integrally molded casting, the specifications of the reducer are fixed, and it cannot be applied to air flow conveying at different speeds. When the air flow velocity is too fast, the air flow is likely to cause greater pressure fluctuations and turbulence when passing through the reducer, increasing the energy loss of the air flow, thereby reducing the acceleration effect of the air flow.

[0006] In order to achieve the above-mentioned object, the present invention adopts the following technology: an airflow accelerator for a compressed air dryer: comprising an external shell, a motor is mounted on the outside of the external shell, an air delivery pipe is arranged inside the external shell, a drive shaft of the motor is connected to an impeller located outside the air delivery pipe, and further comprising:

[0007] The diameter-changing mechanism comprises an accelerating tube a slidably connected to the inside of the air delivery tube, and a telescopic component is arranged on the top of the accelerating tube a.

[0008] A flow guiding mechanism, the flow guiding mechanism comprises a top plate fixed between the inner wall of the outer shell and the outer wall of the air delivery pipe, the top plate is provided with air inlet holes arranged in an annular manner and at equal intervals, the air delivery pipe is fixedly connected with a plurality of accelerating tubes b communicating with the inside of the air delivery pipe, and the bottom ends of the plurality of accelerating tubes b are in a retracted shape;

[0009] The rotation of the impeller creates negative pressure, causing the outside air to be evenly sucked into the interior of the external shell through the air inlet holes of the top plate. The air then passes through the accelerating tube b and enters the air duct to accelerate the air flow passing through the air duct. The pressure of the accelerated air flow acts on the telescopic component to change the length of the telescopic component.

[0010] As a further description of the airflow accelerator for a compressed air dryer according to the above technology: the telescopic component includes a support rod a rotatably connected to the inner wall of the air duct, the top of the accelerating tube a is rotatably connected to a support rod b inserted into the inside of the support rod a, an airtight elastic cloth is fixedly connected between the top of the accelerating tube a and the inner wall of the air duct, a plurality of the support rods a and support rods b are surrounded by the outside of the airtight elastic cloth, a guide ring is fixedly installed at the connection between the accelerating tube a and the airtight elastic cloth, and the top of the guide ring is bent and expanded outward and fits with the airtight elastic cloth.

[0011] As a further description of the airflow accelerator for a compressed air dryer of the above technology: the bottom of the accelerating tube a is fixedly connected to an extension rod that passes through the bottom end of the air supply pipe, and the bottom end of the extension rod is threadedly connected to a locking bolt.

[0012] As a further description of the airflow accelerator for a compressed air dryer of the above technology: a slider slidably connected to the air outlet pipe is fixedly installed at the bottom end of the extension rod, and a scale is set on the air outlet pipe along the sliding track of the slider.

[0013] As a further description of the airflow accelerator for a compressed air dryer of the above technology: the interior of the air supply pipe is fixedly connected to an outlet pipe located directly below the acceleration tube a, the bottom of the outlet pipe is fixedly connected to a connecting tube inserted into the outlet pipe, and a spring is arranged between the outlet pipe and the acceleration tube a.

[0014] As a further description of the airflow accelerator for a compressed air dryer of the above technology: an inclined air inlet pipe is fixedly installed in the air inlet hole of each top plate, and the bottom end of the air inlet pipe is cylindrical and the diameter is half of the top end diameter.

[0015] As a further description of the airflow accelerator for a compressed air dryer of the above technology: a first wind shield is fixedly connected to the bottom of the top plate, a second wind shield located inside the first wind shield is fixedly connected to the upper part of the air supply pipe, a connecting ring penetrated by an acceleration tube b is fixed to the top of the second wind shield, a gap is present between the bottom end of the outer shell and the air supply pipe, and a collection box connected to the gap is detachably mounted on the air supply pipe at the bottom of the outer shell.

[0016] As a further description of the airflow accelerator for a compressed air dryer of the above technology: a flow guide cover is fixedly connected to the top of the top plate, and a grid is installed on the top of the external shell.

[0017] In summary, due to the use of the above-mentioned technology, the airflow accelerator for a compressed air dryer has the following beneficial effects:

[0018] The length of the telescopic component can be adaptively changed with the velocity of the airflow. When the velocity of the airflow increases, the length of the telescopic component increases, so that the airflow has more time and space to transition during the acceleration process when it passes through the air duct and enters the acceleration tube a, thereby achieving a smoother flow velocity change, helping to reduce the turbulence of the airflow, reduce pressure loss, and achieve a better acceleration effect. In addition, reducing the turbulence of the airflow can also reduce the impact of the airflow on the pipeline and equipment during the transportation process, thereby reducing vibration and reducing airflow noise, protecting the structural safety of the system;

[0019] When the air velocity decreases, the length of the telescopic assembly decreases, thereby reducing the friction area and friction time between the airflow and the inner wall of the pipe during transportation, reducing the friction resistance, reducing the energy loss of the airflow, and facilitating the accelerated transportation of the airflow. At the same time, the shortening of the telescopic assembly can also make the airflow enter the accelerating tube a faster, thereby improving the acceleration degree of the airflow;

[0020] The length of the telescopic component can be adaptively adjusted as the airflow velocity changes, so as to be suitable for airflows of different velocity, so that the airflow velocity and the energy loss during the acceleration process are balanced, thereby avoiding unnecessary energy loss and ensuring the acceleration effect of the airflow;

[0021] The air flow can flow downward in a spiral in the outer shell through the air inlet pipe, so that the impurities in the air are thrown out into the collection box under the action of inertia, thereby filtering the impurities, reducing the impurities entering the compressed air dryer during the operation of the device, avoiding the accumulation of impurities and causing blockage inside the compressed air dryer, and improving the cleanliness of the compressed air dryer output air;

[0022] The air delivery pipe is located in the middle of the outer shell, the air intake pipe and the acceleration tube b are arranged in a circular array, and the air ducts between the outer shell, the first wind shield and the second wind shield are all annular, so the airflow blown out by the impeller can evenly enter between the air delivery pipes through each acceleration tube b, and evenly accelerate the airflow passing through the air delivery pipe, so that the airflow is evenly transported, avoiding the turbulence caused by the local flow velocity of the airflow being too high or too low, causing energy loss, thereby improving the acceleration effect of the airflow, and the uniform airflow inflow can reduce the generation of turbulence and eddy currents, and improve the efficiency and stability of airflow acceleration;

[0023] The uniform acceleration of the airflow can make the pressure distribution inside the pipeline more balanced. When the airflow contacts the moisture adsorbent inside the compression dryer, it can ensure that all parts of the moisture adsorbent can fully contact the airflow, maximize the adsorption capacity of the adsorbent, and capture more moisture, thereby assisting the compressed air dryer to achieve a better drying effect. At the same time, it ensures that the moisture adsorbent has a consistent degree of water absorption in each area, avoiding the formation of local saturation and extending the service life of the moisture adsorbent. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It shows an overall schematic diagram provided according to an embodiment of the present invention;

[0025] Figure 2 A schematic diagram of airflow direction provided by an embodiment of the present invention is shown;

[0026] Figure 3 An internal schematic diagram provided according to an embodiment of the present invention is shown;

[0027] Figure 4 The embodiment of the present invention provides Figure 3 The enlarged schematic diagram at A in the middle;

[0028] Figure 5 A schematic diagram of an explosion of a collection box provided in an embodiment of the present invention is shown;

[0029] Figure 6 It shows a schematic diagram of the installation of an accelerating tube a provided in an embodiment of the present invention;

[0030] Figure 7 A schematic diagram of a telescopic assembly provided according to an embodiment of the present invention is shown;

[0031] Figure 8 A schematic cross-sectional view of a support rod a provided in an embodiment of the present invention is shown;

[0032] Fig. 9 A schematic diagram of the bottom of an external housing provided according to an embodiment of the present invention is shown;

[0033] Fig.10The embodiment of the present invention provides Fig. 9 Enlarged schematic diagram of point B in the middle.

[0034] Legend:

[0035] 10. External housing; 11. Motor; 12. Impeller; 13. Air duct;

[0036] 20. Variable diameter mechanism; 21. Accelerating tube a; 22. Telescopic assembly; 221. Support rod a; 222. Support rod b; 223. Airtight elastic cloth; 23. Exhaust pipe; 24. Connecting tube; 25. Spring; 26. Guide ring; 27. Extension rod; 28. Sliding block; 29. ​​Locking bolt;

[0037] 30. air guide mechanism; 31. top plate; 32. air inlet pipe; 33. first wind shield; 34. connecting ring; 35. second wind shield; 36. accelerating tube b; 37. air guide cover; 38. grid frame; 39. collecting box. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technology in the embodiments of the present invention, an airflow accelerator for a compressed air dryer. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] like Figure 1-Figure 10 As shown, the present invention provides: an airflow accelerator for a compressed air dryer: comprising an external shell 10, a motor 11 is mounted on the outside of the external shell 10, an air delivery pipe 13 is provided inside the external shell 10, a driving shaft of the motor 11 is connected to an impeller 12 located outside the air delivery pipe 13, and also includes:

[0040] The diameter-changing mechanism 20 includes an accelerating tube a21 slidably connected to the inside of the air delivery tube 13, and a telescopic component 22 is provided on the top of the accelerating tube a21.

[0041] The flow guide mechanism 30 includes a top plate 31 fixed between the inner wall of the outer shell 10 and the outer wall of the air duct 13. The top plate 31 is provided with air inlet holes arranged in an annular manner and arranged equidistantly. The function of the top plate 31 is to make the airflow generated by the rotation of the impeller 12 evenly enter the outer shell 10 through the plurality of air inlet holes. The air duct 13 is fixedly connected with a plurality of accelerating tubes b36 connected with the inside of the air duct 13. The bottom ends of the plurality of accelerating tubes b36 are gathered, so that the airflow passes through the accelerating tubes b36 and enters the air duct 13 obliquely downward, pushing the airflow in the air duct 13, thereby achieving the acceleration effect of the airflow. The plurality of accelerating tubes b36 are arranged in a circular array, so that the airflow can enter the air duct 13 from all sides at the same time, thereby achieving the uniform acceleration of the airflow in the air duct 13.

[0042] The rotation of the impeller 12 creates negative pressure, causing the outside air to be evenly sucked into the interior of the external shell 10 through the air inlet hole of the top plate 31. The air then passes through the accelerating tube b36 and enters the air duct 13 to accelerate the air flow passing through the air duct 13. The pressure of the accelerated air flow acts on the telescopic component 22, changing the length of the telescopic component 22.

[0043] Reference Figure 7 and Figure 8 The telescopic assembly 22 includes a support rod a221 rotatably connected to the inner wall of the air delivery pipe 13, the top of the accelerating tube a21 is rotatably connected to a support rod b222 inserted into the support rod a221, and an airtight elastic cloth 223 is fixedly connected between the top of the accelerating tube a21 and the inner wall of the air delivery pipe 13. A plurality of support rods a221 and support rods b222 surround the outside of the airtight elastic cloth 223 to support the airtight elastic cloth 223, so that the airtight elastic cloth 223 always maintains a cone shape, which has a guiding effect on the airflow. The accelerating tube a21 is slidably connected to the air delivery pipe 13, and the movement of the accelerating tube a21 can drive the support rod a 221 and support rod b222 are deflected, and the top and bottom diameters of the telescopic component 22 remain unchanged, and only the length of the variable diameter section is adjusted to adapt to the air flow velocity. A guide ring 26 is fixedly installed at the connection between the accelerating tube a21 and the airtight elastic cloth 223. The top of the guide ring 26 is bent and expanded outward and fits with the airtight elastic cloth 223. The function is to transition the connection between the accelerating tube a21 and the airtight elastic cloth 223, so that the airflow can flow more smoothly through the connection between the airtight elastic cloth 223 and the support rod a221, and avoid that when the airtight elastic cloth 223 becomes shorter, the angle between the accelerating tube a21 and the accelerating tube a21 is too large, which increases the energy loss of the airflow.

[0044] Reference Figure 6 , Figure 7 and Fig.10The bottom of the accelerating tube a21 is fixedly connected with an extension rod 27 that passes through the bottom end of the air supply pipe 13. The bottom end of the extension rod 27 is threadedly connected with a locking bolt 29. The position of the accelerating tube a21 can be manually adjusted through the extension rod 27, thereby realizing the length adjustment of the telescopic component 22, which is convenient for directly controlling the flow rate of the airflow after passing through the telescopic component 22. The locking bolt 29 is used to lock the extension rod 27 after the position is adjusted.

[0045] Reference Fig.10 A slider 28 slidably connected to the air outlet pipe 23 is fixedly installed at the bottom end of the extension rod 27. A scale is provided on the air outlet pipe 23 along the sliding track of the slider 28. The air flow velocity passing through the telescopic component 22 can be measured digitally through the slider 28 and the scale, which is convenient for manual control of the air flow velocity, thereby controlling the use effect of the compressed air dryer, and further facilitating manual adjustment of the length of the telescopic component 22 to control the air flow velocity.

[0046] Reference Figure 6 The inside of the air supply pipe 13 is fixedly connected with an outlet pipe 23 located directly below the accelerating tube a21, and the bottom of the outlet pipe 23 is fixedly connected with a connecting tube 24 inserted into the outlet pipe 23. A spring 25 for resetting the accelerating tube a21 is provided between the outlet pipe 23 and the accelerating tube a21. An extension rod 27 is fixed inside the air supply pipe 13 and is used to fix and connect with the air pipe of the compressed air dryer. The function of the connecting tube 24 is to block the airflow passing through the accelerating tube a21 to prevent the airflow from leaking from between the accelerating tube a21 and the air outlet pipe 23, thereby ensuring the airflow transportation effect.

[0047] Reference Figure 2 and Figure 3 The air inlet holes of each top plate 31 are fixedly installed with an inclined air inlet pipe 32, so that the airflow can enter the outer shell 10 at an inclined angle after passing through the air inlet pipe 32. Then, the airflow flows in a spiral track in the outer shell 10, which is convenient for separating impurities in the airflow. The bottom end of the air inlet pipe 32 is cylindrical and its diameter is half of the top end diameter, in order to initially accelerate the airflow, so that the impurities in the airflow have a higher speed and inertia, and further improve the separation effect of impurities.

[0048] Reference Figure 2 , Figure 3 , Figure 5 and Fig. 9A first windshield 33 is fixedly connected to the bottom of the top plate 31, and a second windshield 35 located inside the first windshield 33 is fixedly connected to the upper part of the air supply pipe 13. A connecting ring 34 penetrated by the accelerating tube b36 is fixed to the top of the second windshield 35. The airflow is blocked by the connecting ring 34 and the second windshield 35, so that the airflow is guided to the accelerating tube b36 after being turned back at the bottom of the external shell 10, thereby preventing turbulence in the first windshield 33. There is a gap between the bottom end of the external shell 10 and the air supply pipe 13, and a collecting box 39 connected to the gap is detachably installed on the air supply pipe 13 at the bottom position of the external shell 10. When the airflow enters the collecting box 39, the air pressure in the collecting box 39 will increase, thereby turning back the airflow, and impurities in the airflow enter the collecting box 39 under the action of inertia and are difficult to continue to rise with the airflow, thereby realizing the separation of impurities.

[0049] A guide cover 37 is fixedly connected to the top of the top plate 31 for guiding air into the air inlet pipe 32. A grid 38 is installed on the top of the outer shell 10 for shielding large-volume impurities and preventing manual contact with the impeller 12 to cause danger.

[0050] Working principle: In the initial state, the bottom end of the air outlet pipe 23 is connected and fixed to the air inlet end of the compressed air dryer air pipe, and the compressed air dryer draws the outside air into the body through the air delivery pipe 13, and there is air flow passing through the air delivery pipe 13;

[0051] The starter motor 11 drives the impeller 12 to rotate, and the rotation of the impeller 12 transports the outside air to the inside of the outer shell 10. The airflow passes through the air intake pipe 32 under the action of air pressure and flows deep into the outer shell 10. Since the air intake pipe 32 is tilted and the bottom diameter is smaller than the top diameter, the airflow is accelerated after passing through the air intake pipe 32 and enters the outer shell 10 obliquely and evenly, so that the airflow is spirally transported downward inside the outer shell 10. After the airflow flows to the bottom of the outer shell 10 and enters the collection box 39, the air pressure inside the collection box 39 increases, so that the airflow is turned back and enters the first windshield 33. In this process, impurities in the airflow enter the collection box 39 under the action of inertia and can no longer move again with the turned-back airflow, thereby achieving impurity purification.

[0052] The airflow then enters from the top of the accelerating tube b36 under the shielding of the second wind shield 35 and the connecting ring 34, and then enters the air supply pipe 13 obliquely through the accelerating tube b36. At this time, the flow rate of this part of the airflow is greater than the flow rate of the airflow in the air supply pipe 13. Therefore, after the airflow enters the air supply pipe 13, it can accelerate the airflow in the air supply pipe 13. Since the diameter of the air supply pipe 13 is greater than the diameter of the accelerating tube a21, the airflow can be accelerated when it passes through the airtight elastic cloth 223 and enters the accelerating tube a21. Finally, it is accelerated and enters the air pipe of the compressed air dryer through the connecting tube 24 and the air outlet pipe 23.

[0053] When the airflow accelerates through the airtight elastic cloth 223, pressure is applied to the telescopic assembly 22. Under the action of pressure, the support rods a221 and b222 deflect outward, thereby driving the accelerating tube a21 to move downward. During this process, the airtight elastic cloth 223 undergoes elastic deformation and always adheres to the inner sides of the support rods a221 and b222. Since the support rods b222 are rotatably connected to the accelerating tube a21, the deflection of the support rods a221 and b222 will cause the support rods b222 to move outward from the support rods a221, so that the whole formed by the support rods a221 and b222 is elongated, thereby extending the telescopic assembly 22, so that the airflow has more sufficient time and space to transition during the acceleration process, which helps to reduce the turbulence of the airflow and achieve a smoother flow rate change. The faster the airflow rate, the greater the pressure on the telescopic assembly 22. Therefore, the length of the telescopic assembly 22 can change with the airflow rate, so that the airflow rate and the energy loss during the acceleration process are balanced.

[0054] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacement or changes to the airflow accelerator for a compressed air dryer and its inventive concept according to the technology of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An airflow accelerator for a compressed air dryer, comprising an outer shell (10), a motor (11) is mounted on the outside of the outer shell (10), an air delivery pipe (13) is provided through the inside of the outer shell (10), a drive shaft of the motor (11) is drivingly connected to an impeller (12) located outside the air delivery pipe (13), characterized in that: Also includes: The diameter-changing mechanism (20) comprises an accelerating tube a (21) slidably connected to the inside of the air delivery tube (13), and a telescopic component (22) is arranged on the top of the accelerating tube a (21). A flow guiding mechanism (30), the flow guiding mechanism (30) comprising a top plate (31) fixed between the inner wall of the outer shell (10) and the outer wall of the air delivery pipe (13), the top plate (31) being provided with air inlet holes arranged in an annular pattern at equal intervals, the air delivery pipe (13) being fixedly connected with a plurality of accelerating tubes b (36) communicating with the interior of the air delivery pipe (13), the bottom ends of the plurality of accelerating tubes b (36) being in a retracted shape; The impeller (12) rotates to create negative pressure, causing external air to be evenly sucked into the interior of the external shell (10) through the air inlet holes of the top plate (31), and then the air passes through the accelerating tube b (36) and enters the interior of the air supply pipe (13), thereby accelerating the air flow passing through the air supply pipe (13). The pressure of the accelerated air flow acts on the telescopic component (22), thereby changing the length of the telescopic component (22).

2. The airflow accelerator for a compressed air dryer according to claim 1, characterized in that: The telescopic assembly (22) comprises a support rod a (221) rotatably connected to the inner wall of the air supply pipe (13); the top of the accelerating tube a (21) is rotatably connected to a support rod b (222) inserted into the support rod a (221); an airtight elastic cloth (223) is fixedly connected between the top of the accelerating tube a (21) and the inner wall of the air supply pipe (13); a plurality of the support rods a (221) and the support rods b (222) surround the outside of the airtight elastic cloth (223); a guide ring (26) is fixedly installed at the connection between the accelerating tube a (21) and the airtight elastic cloth (223); the top of the guide ring (26) is bent outward and expanded and fits with the airtight elastic cloth (223).

3. The airflow accelerator for a compressed air dryer according to claim 1, characterized in that: The bottom of the accelerating tube a (21) is fixedly connected to an extension rod (27) penetrating the bottom end of the air supply pipe (13), and the bottom end of the extension rod (27) is threadedly connected to a locking bolt (29).

4. The airflow accelerator for a compressed air dryer according to claim 3, characterized in that: A slider (28) slidably connected to the air outlet pipe (23) is fixedly mounted on the bottom end of the extension rod (27), and a scale is provided on the air outlet pipe (23) along the sliding track of the slider (28).

5. The airflow accelerator for a compressed air dryer according to claim 4, characterized in that: An air outlet pipe (23) located directly below the accelerating tube a (21) is fixedly connected to the interior of the air delivery pipe (13); a connecting tube (24) inserted into the interior of the air outlet pipe (23) is fixedly connected to the bottom of the air outlet pipe (23); and a spring (25) is provided between the air outlet pipe (23) and the accelerating tube a (21).

6. The airflow accelerator for a compressed air dryer according to claim 1, characterized in that: An inclined air inlet pipe (32) is fixedly installed in the air inlet hole of each top plate (31); the bottom end of the air inlet pipe (32) is cylindrical and has a diameter that is half the diameter of the top end.

7. The airflow accelerator for a compressed air dryer according to claim 6, characterized in that: The bottom of the top plate (31) is fixedly connected to a first wind shield (33); the top of the air supply pipe (13) is fixedly connected to a second wind shield (35) located inside the first wind shield (33); the top of the second wind shield (35) is fixedly connected to a connecting ring (34) penetrated by an accelerating tube b (36); a gap exists between the bottom end of the external shell (10) and the air supply pipe (13); and a collecting box (39) connected to the gap is detachably mounted on the air supply pipe (13) at the bottom of the external shell (10).

8. The airflow accelerator for a compressed air dryer according to claim 1, characterized in that: A flow guide cover (37) is fixedly connected to the top of the top plate (31), and a grid frame (38) is installed on the top of the external shell (10).

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