Noise reduction method for air conditioner of high-speed motor train unit

Abstract

The invention relates to the technical field of railway vehicle air conditioning systems, and provides a noise reduction method for an air conditioner of a high-speed motor train unit, which comprises the following steps: step 1, when air conditioner fan blades enter a low-speed rotating mode, a first electric sliding door slides towards two sides, an electric push rod pushes a connecting pipe to approach the air conditioner fan blades, and the air conditioner fan blades rotate to drive the first electric sliding door to rotate; the two rotary cleaning brushes rotate towards one side at the same time to clean dust attached to the surfaces of the air conditioner fan blades. Secondly, when dust on the surfaces of the air conditioner fan blades is cleaned, a blowing and sucking machine is started to adsorb the dust in the cleaning process, and air full of the dust is filtered; and thirdly, when the dust on the surfaces of the air conditioner fan blades is cleaned, the reciprocating cleaning brush swings back and forth to scrape the dust falling on the blocking net. Through rotation of the air conditioner fan blades, the two rotary cleaning brushes rotate towards one side at the same time to clean dust attached to the surfaces of the air conditioner fan blades, the blowing and sucking machine adsorbs the dust in the cleaning process and filters air full of the dust, accumulated dust is reduced, airflow is more stable when the fan works, and therefore noise is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of rail vehicle air conditioning systems, and in particular to a noise reduction method for high-speed train air conditioning. Background Art

[0002] The air conditioning system of a high-speed train is an indispensable part of modern high-speed trains, responsible for providing passengers with comfortable temperature and air quality. The air conditioning system of a high-speed train must not only meet the temperature regulation requirements, but also have excellent performance in terms of high speed, low noise, and low energy consumption. The noise reduction method of the air conditioning system of a high-speed train involves many aspects, and the main goal is to reduce the noise generated during the operation of the air conditioning system and improve passenger comfort by optimizing the design, technical means, and material selection.

[0003] At present, the air conditioner of the train will generate noise when it is running. There are many reasons for the noise. If there is too much dust on the fan blades, the airflow will be unstable when the fan is working, thereby increasing the noise. The existing technical means are to clean the fan blades when the train stops for maintenance, which is not timely and effective in cleaning dust. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a noise reduction method for a high-speed train air conditioner, which solves the problem that excessive dust accumulation on the fan blades causes unstable airflow when the fan is working, thereby increasing noise.

[0005] To achieve the above purpose, the present invention is implemented by the following technical scheme: a noise reduction method for a high-speed train air conditioner, comprising the following steps:

[0006] Step 1: When the air conditioner fan blade enters the low-speed rotation mode, the first electric sliding door slides to both sides, and the electric push rod pushes the connecting pipe to the air conditioner fan blade. Through the rotation of the air conditioner fan blade, the two rotating cleaning brushes rotate to one side at the same time to clean the dust adhered to the surface of the air conditioner fan blade;

[0007] Step 2: When the dust on the surface of the air conditioner fan blade is cleaned, start the blower and suction machine to absorb the dust during the cleaning process and filter the dust-filled air;

[0008] Step 3: When the dust on the surface of the air conditioner fan blades is cleaned, the reciprocating cleaning brush swings back and forth to scrape the dust that falls on the blocking net.

[0009] Step 4: The scraped dust falls into the collection frame, the second electric sliding door slides to both sides, and then releases the restraint on the bottom plate, discharges the dust collected in the collection frame, and cleans the inner wall and bottom plate of the collection frame.

[0010] Preferably, the specific process of the movement of the rotating cleaning brush in step one is that the second pulley contacts the belt strip, the two first pulleys rotate to drive the belt strip to move, the second pulley rotates to drive the reciprocating screw to rotate, the reciprocating screw drives the bevel gear to rotate and meshes with the gear block to drive the gear block to rotate, the gear block meshes with the transmission gear to make it rotate, the two transmission gears mesh so that the two rotating cleaning brushes rotate and rotate to one side at the same time to clean the dust adhered to the surface of the air conditioner fan blades.

[0011] Preferably, the specific process of the movement of the blower-suction machine in step 2 is that the blower-suction machine blows air into the two air outlet pipes to blow the cleaned dust toward the middle, and the blower-suction machine sucks the dust through the two air intake pipes. During the inhalation process, the filter adsorbs the dust to purify the air.

[0012] Preferably, the specific process of the reciprocating cleaning brush movement in step three is that the second pulley drives the reciprocating screw to rotate, so that the reciprocating screw drives the reciprocating slider to slide back and forth, and the reciprocating slider drives the reciprocating cleaning brush to rotate during the reciprocating sliding process, so that it swings to scrape the barrier net.

[0013] Preferably, the specific process of releasing the restraint on the bottom plate in step 4 is to twist the connecting screws to release the connection between the collection frame and the bottom plate, so that the bottom plate can rotate.

[0014] Preferably, a fan blade groove is provided at the bottom of the air-conditioning group, a blocking net is fixedly connected to the bottom side of the inner wall of the fan blade groove, two air-conditioning blades are arranged on the inner wall of the fan blade groove, storage grooves are provided on the front and rear sides of the fan blade groove, a first electric sliding door is provided on the front side of the inner wall of the storage groove, and a second electric sliding door is provided on the bottom side of the inner wall of the storage groove, an electric push rod is fixedly connected to the inner wall of the storage groove, a connecting pipe is fixedly connected to the driving end of the electric push rod, two rotating cleaning brushes are rotatably connected to the left side of the connecting pipe, and the adjacent sides of the two rotating cleaning brushes abut against the outer wall of the air-conditioning blade, a reciprocating screw is provided on the inner wall of the connecting pipe, and the top end of the reciprocating screw is connected to the top end of the outer wall of the air-conditioning blade through a transmission assembly to drive the reciprocating screw to rotate, and the reciprocating screw The bottom end is connected with the right ends of two rotating cleaning brushes through a rotating assembly to make the rotating cleaning brush rotate, and a reciprocating slider is provided on the outer wall of the reciprocating screw, and a reciprocating cleaning brush is rotatably connected to the right side of the outer wall of the reciprocating slider, and the bottom of the reciprocating cleaning brush abuts against the top of the blocking net, and the bottom of the electric push rod driving end is fixedly connected to a collecting frame, and the rear side of the bottom of the collecting frame is rotatably connected to a bottom plate, and the front side of the top of the bottom plate abuts against the front side of the bottom of the collecting frame, and a blower-suction machine is fixedly connected to the inner wall of the air-conditioning unit, and air outlet pipes are fixedly connected on the left and right sides of the blower-suction machine, and the bottom ends of the two air outlet pipes are fixedly connected to the left and right sides of the inner wall of the fan blade groove, and two suction pipes are fixedly connected to the front side of the blower-suction machine, and the bottom end of the suction pipe is fixedly connected to the top side of the inner wall of the fan blade groove.

[0015] Preferably, the transmission assembly includes a first pulley fixedly connected to the top of the outer wall of the air-conditioning fan blade, the two first pulleys are connected through the inner side of the belt strip, the top of the reciprocating screw is fixedly connected to a second pulley, the inner wall of the second pulley on the left side abuts against the rear side of the belt strip, and the inner wall of the second pulley on the right side abuts against the front side of the belt strip.

[0016] Preferably, the rotating assembly includes a bevel gear fixedly connected to the bottom end of the reciprocating screw, the right end of the rotating cleaning brush at the bottom is fixedly connected to a gear block, the right side of the outer wall of the gear block is meshingly connected to the left side of the outer wall of the bevel gear, and the right side of the outer wall of the rotating cleaning brush at the top is fixedly connected to a transmission gear, and the bottom side of the outer wall of the transmission gear is meshingly connected to the left side of the outer wall of the gear block.

[0017] Preferably, one-way air nozzles are provided on both sides of the left and right inner walls of the blade groove, and the two one-way air nozzles are abutted against the sides close to the two outlet pipes on the separated sides, and two filters are fixedly connected to the top of the inner wall of the blade groove, and the top of the filter abuts against the bottom end of the intake pipe.

[0018] Preferably, the bottom plate and the collecting frame are connected via connecting screws.

[0019] Working principle: First, when the air conditioner blades start to rotate at a low speed, the first electric sliding door slides to both sides, and the electric push rod pushes the connecting pipe to drive the reciprocating cleaning brush and the rotating cleaning brush to approach the air conditioner blades. When approaching the air conditioner blades, the second pulley contacts the belt strip moving between the two first pulleys, and the belt strip movement drives the second pulley to rotate, and the second pulley drives the reciprocating screw to rotate, and the reciprocating screw drives the bevel gear to rotate. Because the right side of the gear block is helical teeth, the bevel gear meshes with it to drive the gear block to rotate. The left side of the outer wall of the gear block is flat teeth, so the rotation of the gear block drives the bottom rotating cleaning brush to rotate while meshing with the transmission gear to drive the top rotating cleaning brush to rotate, and clean the dust on the blades. Start the blower and vacuum machine, which blows air through the outlet pipe to blow the cleaned dust between the blade slots, and then the blower and vacuum machine inhales the dust-containing air through the suction pipe, and then filters the dust in the air through the filter to purify the dust. The scraped dust falls onto the blocking net, and the reciprocating screw rotates to drive the reciprocating slider to slide back and forth. The reciprocating cleaning brush is driven by inertia to swing back and forth to scrape the dust on the blocking net and make it fall into the collection frame. When the cleaning is completed, the electric push rod is started to collect the connecting pipe and the collection frame into the storage tank, and the first electric sliding door slides to protect the equipment in the storage tank. When the dust collected in the collection frame needs to be discharged, the second electric sliding door slides to both sides, the connection screw is turned to release the connection between the bottom plate and the collection frame, and the bottom plate is rotated to discharge the dust, and the collection frame and the bottom plate are cleaned.

[0020] The present invention provides a noise reduction method for a high-speed train air conditioner. It has the following beneficial effects:

[0021] 1. The present invention rotates the air conditioner blades so that two rotating cleaning brushes rotate to one side at the same time to clean the dust adhered to the surface of the air conditioner blades. The blower and suction machine absorbs the dust in the cleaning process and filters the dust-filled air to reduce dust accumulation. The airflow when the fan is working is more stable, thereby reducing noise.

[0022] 2. The present invention scrapes the dust that falls on the blocking net by swinging the reciprocating cleaning brush back and forth. The scraped dust falls into the collecting frame. The connecting screws are turned to release the fixing of the collecting frame and the bottom plate. The bottom plate is rotated to discharge the dust collected in the collecting frame, and the inner wall and the bottom plate of the collecting frame are cleaned, thereby reducing the disassembly of the blocking net and the air-conditioning fan blades and reducing equipment wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a flow chart of the present invention;

[0024] Figure 2 A perspective view of the present invention;

[0025] Figure 3 It is a schematic diagram of the air conditioner fan blade of the present invention;

[0026] Figure 4 It is a schematic diagram of the circulation component of the present invention;

[0027] Figure 5 It is a schematic diagram of the electric push rod of the present invention;

[0028] Figure 6 is a schematic diagram of a first pulley of the present invention;

[0029] Figure 7 is a schematic diagram of a second pulley of the present invention;

[0030] Figure 8 It is a schematic diagram of the reciprocating screw of the present invention;

[0031] Fig. 9 It is a schematic diagram of the connecting screw of the present invention.

[0032] Among them, 1. air conditioning unit; 2. barrier net; 3. air conditioning fan blades; 4. blower and vacuum machine; 5. exhaust pipe; 6. one-way air nozzle; 7. suction pipe; 8. filter; 9. electric push rod; 10. first electric sliding door; 11. second electric sliding door; 12. connecting pipe; 13. reciprocating cleaning brush; 14. rotating cleaning brush; 15. reciprocating screw; 16. reciprocating slider; 17. bevel gear; 18. transmission gear; 19. first pulley; 20. second pulley; 21. collection frame; 22. bottom plate; 23. connecting screw; 24. gear block. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0034] Example:

[0035] As one aspect of this application, please see the attached Figure 1 The embodiment of the present invention provides a method for reducing noise of a high-speed train air conditioner, comprising the following steps:

[0036] Step 1. When the air-conditioning fan blade 3 enters the low-speed rotation mode, the first electric sliding door 10 slides to both sides, and the electric push rod 9 pushes the connecting pipe 12 to approach the air-conditioning fan blade 3. Through the rotation of the air-conditioning fan blade 3, the second pulley 20 contacts the belt strip, and the two first pulleys 19 rotate to drive the belt strip to move, so that the second pulley 20 rotates to drive the reciprocating screw 15 to rotate, and the reciprocating screw 15 drives the bevel gear 17 to rotate and mesh with the gear block 24 to drive the gear block 24 to rotate, and the gear block 24 meshes with the transmission gear 18 to make it rotate, and the two transmission gears 18 mesh so that the two rotating cleaning brushes 14 rotate to one side at the same time to clean the dust adhered to the surface of the air-conditioning fan blade 3.

[0037] Step 2. When the dust on the surface of the air-conditioning fan blade 3 is cleaned, the blower-suction machine 4 blows air to the two air outlet pipes 5 to blow the cleaned dust toward the middle. The blower-suction machine 4 sucks the dust through the two air intake pipes 7. During the inhalation process, the filter 8 adsorbs the dust and filters the dust-filled air to purify the air.

[0038] Step 3. When the dust on the surface of the air-conditioning fan blade 3 is cleaned, the second pulley 20 drives the reciprocating screw 15 to rotate, so that the reciprocating screw 15 drives the reciprocating slider 16 to slide back and forth. During the reciprocating sliding process, the reciprocating slider 16 drives the reciprocating cleaning brush 13 to rotate so that it swings to scrape the barrier net 2.

[0039] Step 4: The scraped dust falls into the collection frame 21. The second electric sliding door 11 slides to both sides. The connecting screws 23 are turned to release the connection between the collection frame 21 and the bottom plate 22, so that the bottom plate 22 can rotate, and the dust collected in the collection frame 21 is discharged. The inner wall of the collection frame 21 and the bottom plate 22 are cleaned.

[0040] Based on the above-mentioned noise reduction method for a high-speed train air conditioner, as another aspect of the present application, a noise reduction device for a high-speed train air conditioner comprises:

[0041] Please see attached Figure 5 , Attachment Figure 6 and attached Figure 8 A fan blade groove is provided at the bottom of the air conditioning group 1, and a blocking net 2 is fixedly connected to the bottom side of the inner wall of the fan blade groove to protect the equipment in the fan blade groove; two air conditioning blades 3 are arranged on the inner wall of the fan blade groove, and storage grooves are provided on the front and rear sides of the fan blade groove, and a first electric sliding door 10 is arranged on the front side of the inner wall of the storage groove to protect the equipment in the storage groove; a second electric sliding door 11 is arranged on the bottom side of the inner wall of the storage groove, so that the staff can clean the collection frame 21 through the bottom of the storage groove; an electric push rod 9 is fixedly connected to the inner wall of the storage groove, and a connecting pipe 12 is fixedly connected to the driving end of the electric push rod 9, and the electric push rod 9 pushes the connecting pipe 12 to approach the air conditioning fan blade 3; the left side of the connecting pipe 12 is rotatably connected to two rotating cleaning brushes 14, and the two rotating cleaning brushes 14 are connected to the left side of the connecting pipe 12. The side close to the brush 14 abuts against the outer wall of the air-conditioning fan blade 3 to scrape the dust on the outer wall of the air-conditioning fan blade 3; a reciprocating screw 15 is provided on the inner wall of the connecting tube 12, and a first pulley 19 is fixedly connected to the top end of the outer wall of the air-conditioning fan blade 3, and the two first pulleys 19 are connected through the inner side of the belt strip, and a second pulley 20 is fixedly connected to the top end of the reciprocating screw 15, so that the reciprocating screw 15 and the second pulley 20 rotate together; the inner wall of the second pulley 20 on the left side abuts against the rear side of the belt strip, and the inner wall of the second pulley 20 on the right side abuts against the front side of the belt strip, and the second pulley 20 abuts against the belt strip moving between the two first pulleys 19, and the movement of the belt strip drives the second pulley 20 to rotate, so as to drive the reciprocating screw 15 to rotate.

[0042] Please see attached Figure 6 -Attached Figure 8 The bottom end of the reciprocating screw 15 is fixedly connected to a bevel gear 17, and the right end of the bottom rotating cleaning brush 14 is fixedly connected to a gear block 24. The right side of the outer wall of the gear block 24 is meshed and connected with the left side of the outer wall of the bevel gear 17. Since the right side of the gear block 24 is helical teeth, the meshing of the bevel gear 17 with it drives the gear block to rotate; the right side of the outer wall of the top rotating cleaning brush 14 is fixedly connected to a transmission gear 18, and the bottom side of the outer wall of the transmission gear 18 is meshed and connected with the left side of the outer wall of the gear block 24. Since the left side of the outer wall of the gear block 24 is flat teeth, it rotates with the transmission gear 18 to make the rotating cleaning brush 14 rotate, and a reciprocating slider 16 is provided on the outer wall of the reciprocating screw 15. The right side of the outer wall of the reciprocating slider 16 is rotatably connected with a reciprocating cleaning brush 13, and the bottom of the reciprocating cleaning brush 13 abuts against the top of the blocking net 2. The reciprocating screw 15 drives the reciprocating slider 16 to slide back and forth, and drives the reciprocating cleaning brush 13 to swing back and forth by inertia to scrape the dust on the blocking net 2;

[0043] Please see attached Figure 7 and attached Fig. 9The bottom of the driving end of the electric push rod 9 is fixedly connected with a collecting frame 21, and the scraped dust falls into the collecting frame 21; the rear side of the bottom of the collecting frame 21 is rotatably connected with a bottom plate 22, and the top front side of the bottom plate 22 abuts against the bottom front side of the collecting frame 21. The bottom plate 22 and the collecting frame 21 are connected by connecting screws 23. The connecting screws 23 are turned to release the fixing of the collecting frame 21 and the bottom plate 22, and the bottom plate 22 is rotated to discharge the dust collected in the collecting frame 21, and the inner wall of the collecting frame 21 and the bottom plate 22 are cleaned;

[0044] Please see attached Figure 2 -Attached Figure 4 The inner wall of the air-conditioning group 1 is fixedly connected with a blower and suction machine 4, and the left and right sides of the blower and suction machine 4 are fixedly connected with air outlet pipes 5. The bottom ends of the two air outlet pipes 5 are fixedly connected to the left and right sides of the inner wall of the fan blade groove. The blower and suction machine 4 blows air to the two air outlet pipes 5 to blow the cleaned dust to the middle; two suction pipes 7 are fixedly connected to the front side of the blower and suction machine 4, and the bottom end of the suction pipe 7 is fixedly connected to the top side of the inner wall of the fan blade groove, and the blower and suction machine 4 sucks the dust through the two suction pipes 7; one-way air nozzles 6 are arranged on the left and right sides of the inner wall of the fan blade groove, and the two one-way air nozzles 6 are abutted on the side close to the two air outlet pipes 5 to prevent dust from flowing back when the blower and suction machine 4 is not in use; two filters 8 are fixedly connected to the top of the inner wall of the fan blade groove, and the top of the filter 8 abuts against the bottom end of the suction pipe 7. During the suction process, the filter 8 adsorbs dust and filters the dust-filled air to purify the air.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for reducing noise of a high-speed train air conditioner, characterized in that: The following steps are involved: Step 1: When the air conditioner fan blade (3) enters a low-speed rotation mode, the first electric sliding door (10) slides to both sides, and the electric push rod (9) pushes the connecting pipe (12) to approach the air conditioner fan blade (3). When the air conditioner fan blade (3) rotates, the two rotating cleaning brushes (14) simultaneously rotate to one side to clean the dust adhering to the surface of the air conditioner fan blade (3); Step 2: When the dust on the surface of the air conditioner fan blade (3) is cleaned, the blowing and suction machine (4) is started to absorb the dust in the cleaning process and filter the dust-filled air; Step 3: When the dust on the surface of the air conditioner fan blade (3) is cleaned, the reciprocating cleaning brush (13) swings back and forth to scrape the dust that has fallen on the blocking net (2); Step 4: The scraped dust falls into the collection frame (21), the second electric sliding door (11) slides to both sides, and then releases the restraint on the bottom plate (22), discharges the dust collected in the collection frame (21), and cleans the inner wall of the collection frame (21) and the bottom plate (22).

2. A noise reduction method for a high-speed train air conditioner according to claim 1, characterized in that: The specific process of the movement of the rotating cleaning brush (14) in step 1 is as follows: the second pulley (20) contacts the belt strip, the two first pulleys (19) rotate to drive the belt strip to move, so that the second pulley (20) rotates to drive the reciprocating screw (15) to rotate, the reciprocating screw (15) drives the bevel gear (17) to rotate and meshes with the gear block (24) to drive the gear block (24) to rotate, the gear block (24) meshes with the transmission gear (18) to rotate, the two transmission gears (18) mesh to rotate the two rotating cleaning brushes (14) and simultaneously rotate to one side to clean the dust adhered to the surface of the air conditioner blade (3).

3. The noise reduction method for a high-speed train air conditioner according to claim 1, characterized in that: The specific process of the movement of the blowing and suction machine (4) in step 2 is that the blowing and suction machine (4) blows air to the two air outlet pipes (5) to blow the cleaned dust toward the middle, and the blowing and suction machine (4) sucks the dust through the two air intake pipes (7). During the inhalation process, the filter (8) absorbs the dust to purify the air.

4. The noise reduction method for a high-speed train air conditioner according to claim 1, characterized in that: The specific process of the movement of the reciprocating cleaning brush (13) in step three is that the second pulley (20) drives the reciprocating screw (15) to rotate, so that the reciprocating screw (15) drives the reciprocating slider (16) to slide back and forth, and the reciprocating slider (16) drives the reciprocating cleaning brush (13) to rotate during the reciprocating sliding process, so that it swings and scrapes the blocking net (2).

5. The noise reduction method for a high-speed train air conditioner according to claim 1, characterized in that: The specific process of releasing the restraint on the bottom plate (22) in the step 4 is to twist the connecting screws (23) to release the connection between the collecting frame (21) and the bottom plate (22), so that the bottom plate (22) can rotate.

6. A noise reduction device for a high-speed train air conditioner, using a noise reduction method for a high-speed train air conditioner as described in claims 1-5, characterized in that: include: The bottom of the air conditioning unit (1) is provided with a blade slot, the bottom side of the inner wall of the blade slot is fixedly connected to a blocking net (2), the inner wall of the blade slot is provided with two air conditioning blades (3), the front and rear sides of the blade slot are provided with a storage slot, the front side of the inner wall of the storage slot is provided with a first electric sliding door (10), the bottom side of the inner wall of the storage slot is provided with a second electric sliding door (11), the inner wall of the storage slot is fixedly connected to an electric push rod (9), and the driving end of the electric push rod (9) is fixedly connected to A connecting tube (12) is provided, and two rotating cleaning brushes (14) are rotatably connected to the left side of the connecting tube (12), and the adjacent sides of the two rotating cleaning brushes (14) are in contact with the outer wall of the air conditioner fan blade (3). A reciprocating screw (15) is provided on the inner wall of the connecting tube (12), and the top end of the reciprocating screw (15) is connected to the top end of the outer wall of the air conditioner fan blade (3) through a transmission component to drive the reciprocating screw (15) to rotate, and the bottom end of the reciprocating screw (15) is connected to the outer wall of the air conditioner fan blade (3) through a rotation component. The reciprocating screw (15) is connected to the right ends of the two rotating cleaning brushes (14) to rotate the rotating cleaning brushes (14). The outer wall of the reciprocating screw (15) is provided with a reciprocating slider (16). The right side of the outer wall of the reciprocating slider (16) is rotatably connected to the reciprocating cleaning brush (13). The bottom of the reciprocating cleaning brush (13) abuts against the top of the blocking net (2). The bottom of the driving end of the electric push rod (9) is fixedly connected to a collecting frame (21). The rear side of the bottom of the collecting frame (21) is rotatably connected to the bottom The top front side of the bottom plate (22) is in contact with the bottom front side of the collecting frame (21); the inner wall of the air conditioning unit (1) is fixedly connected with a blower and suction machine (4); the left and right sides of the blower and suction machine (4) are fixedly connected with air outlet pipes (5); the bottom ends of the two air outlet pipes (5) on the adjacent sides are fixedly connected with the left and right sides of the inner wall of the fan blade groove; the front side of the blower and suction machine (4) is fixedly connected with two air intake pipes (7); the bottom ends of the air intake pipes (7) are fixedly connected with the top side of the inner wall of the fan blade groove.

7. The noise reduction device for high-speed train air conditioner according to claim 6, characterized in that: The transmission assembly comprises a first pulley (19) fixedly connected to the top end of the outer wall of the air conditioner fan blade (3), the two first pulleys (19) are connected through the inner side of the belt strip, the top end of the reciprocating screw (15) is fixedly connected to a second pulley (20), the inner wall of the second pulley (20) on the left side abuts against the rear side of the belt strip, and the inner wall of the second pulley (20) on the right side abuts against the front side of the belt strip.

8. The noise reduction device for high-speed train air conditioner according to claim 6, characterized in that: The rotating assembly comprises a bevel gear (17) fixedly connected to the bottom end of the reciprocating screw (15); the right end of the rotating cleaning brush (14) at the bottom is fixedly connected to a gear block (24); the right side of the outer wall of the gear block (24) is meshedly connected to the left side of the outer wall of the bevel gear (17); the right side of the outer wall of the rotating cleaning brush (14) at the top is fixedly connected to a transmission gear (18); the bottom side of the outer wall of the transmission gear (18) is meshedly connected to the left side of the outer wall of the gear block (24).

9. The noise reduction device for high-speed train air conditioner according to claim 6, characterized in that: One-way air nozzles (6) are provided on both sides of the inner wall of the blade groove, and the two one-way air nozzles (6) are in contact with the sides close to the two air outlet pipes (5). Two filters (8) are fixedly connected to the top of the inner wall of the blade groove, and the top of the filter (8) is in contact with the bottom end of the air intake pipe (7).

10. The noise reduction device for high-speed train air conditioner according to claim 6, characterized in that: The bottom plate (22) and the collecting frame (21) are connected via connecting screws (23).

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