Test method of noise testing device for damping material of air conditioner outdoor unit

Abstract

This invention discloses a testing method for a noise testing device for vibration damping materials used in air conditioner outdoor units, relating to the field of vibration damping material testing. The testing device includes a frame placed in a semi-anechoic chamber. A push handle is mounted on the side of the frame, and casters are provided at its bottom. An air conditioner outdoor unit is placed on the frame, and microphones are arranged around the outdoor unit. The microphones are electrically connected to a noise and vibration testing and analysis system and provide the system with collected noise sources. The frame is equipped with a position adjustment mechanism to change the horizontal position of the outdoor unit's support legs. This invention collects the location and decibel level of the sound source by placing adjustable microphones around the outdoor unit. The noise and vibration testing and analysis system then compares and analyzes the differences in noise source data for the outdoor unit under different operating conditions and before and after using vibration damping materials, providing a large amount of data for the study of vibration damping pad performance.

Description

Technical Field

[0001] This invention relates to the field of vibration damping material testing, and in particular to a testing method for a noise testing device for vibration damping materials used in air conditioner outdoor units. Background Technology

[0002] The effectiveness of existing vibration damping pads for air conditioner outdoor units remains unclear. Some companies conduct market research and user feedback, but the data obtained is unreliable and the feedback cycle is long, hindering the development of high-performance vibration damping pads. Some companies conduct noise tests on the vibration damping pads during the R&D phase, but this simply involves placing the air conditioner outdoor unit in a semi-anechoic chamber and collecting the source location and decibel level after the unit starts up using a microphone. This data is then analyzed and compared using a noise and vibration testing and analysis system. While this method can obtain some experimental data to some extent, which is beneficial for optimizing the performance of the vibration damping pads, the limited range of environmental conditions, the lack of comprehensive data on the sound sources and locations, and the resulting limited data types cannot meet the needs for further performance improvements. Furthermore, manually changing the environment of the air conditioner outdoor unit and the microphone position cannot guarantee that the adjustment will be consistent each time, leading to low data reliability. Therefore, a testing method for noise testing devices for vibration damping materials used in air conditioner outdoor units is needed to address these issues. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0004] A testing method for a noise testing device using vibration damping materials for an air conditioner outdoor unit includes a frame placed in a semi-anechoic chamber. The frame has push handles mounted on its sides and casters at its bottom. An air conditioner outdoor unit is placed on the frame. Microphones are arranged around the outdoor unit. Vibration damping pads are bolted to the lower ends of the outdoor unit's support legs. The microphones are electrically connected to a noise vibration testing and analysis system and provide the system with collected noise sources. The noise vibration testing and analysis system is used to compare and analyze the differences in noise source data of the outdoor unit under different environmental operating modes and before and after using vibration damping materials. The frame is equipped with a position adjustment mechanism to change the horizontal position of the outdoor unit's support legs.

[0005] Preferably, the frame has four symmetrically arranged clearance slots around the outdoor unit of the air conditioner. Each clearance slot has a retractable baffle. The lower end of the frame has a driven mechanism one that drives the baffle to move up and down within the clearance slot. The position of the microphone is adjustable and can adaptively adjust with changes in the position of the baffle. The lower end of the frame also has a driven mechanism two that drives changes in the position of the microphone. The base plate of the frame has an active drive mechanism for driving the driven mechanisms one and two to move.

[0006] Preferably, the driven mechanism includes a stabilizer rod installed between the top plate and the bottom plate of the frame and a threaded rod rotatably connected between the top plate and the bottom plate of the frame. The outer side of the baffle is provided with a slider one and a slider two. The slider one is sleeved on the outside of the stabilizer rod, and the slider two is sleeved on the outside of the threaded rod. The slider two has a threaded hole that cooperates with the threaded rod. The stabilizer rod is sleeved with a driven gear one, and the threaded rod is sleeved with a driven gear component.

[0007] Preferably, the driven gear includes gears at both ends and a connecting member in the middle.

[0008] Preferably, the active drive mechanism includes a stand mounted on the base plate of the frame, a driven gear two rotatably connected to the lower end of the stand, a drive gear below the driven gear two, the drive gear being connected to the output shaft of a motor one, the motor one being mounted on the base plate of the frame, and cylinder one and cylinder two distributed on both sides of the driven gear two on the base plate of the frame, cylinder one having a "]" shaped clamping plate one, and cylinder two having a "]" shaped clamping plate two, with a driven gear three rotatably connected to the clamping plate two.

[0009] Preferably, the top plate and bottom plate of the first clamping piece are located on the upper and lower sides of the driven gear, respectively, and the top plate and bottom plate of the second clamping piece are located on the upper and lower sides of the driven gear.

[0010] Preferably, the driven mechanism two includes a bracket A and a bracket B rotatably connected to the microphone. The lower ends of the bracket A and the bracket B are rotatably connected to a fixed shaft, which is mounted on the base plate of the frame. The bracket A is provided with an arc-shaped rack A, and the bracket B is provided with an arc-shaped rack B. The arc-shaped rack A meshes with the driven gear two, and the arc-shaped rack B meshes with the driving gear.

[0011] Preferably, the baffle has a slot, into which inserts of different materials can be inserted.

[0012] Preferably, the position adjustment mechanism includes two symmetrical base plates mounted on the frame, with a support plate and a rotating shaft rotatably connected between the two base plates. The rotating shaft is provided with a cam, the edge of which abuts against the lower end of the support plate. One end of the rotating shaft is connected to the output shaft of a second motor, which is mounted on one of the base plates. The frame is also provided with a support block, and when the surface of the support plate is parallel to the upper surface of the frame, its height is the same as the height of the support block.

[0013] Beneficial effects of this invention:

[0014] 1. This invention collects sound source location and decibel data by setting adjustable microphones around the outdoor unit of an air conditioner. The noise and vibration testing and analysis system is used to compare and analyze the differences in noise source data of the outdoor unit under different operating environments and before and after the use of vibration damping materials, providing a large amount of data for the research on the performance of vibration damping pads.

[0015] 2. This invention collects noise data by setting a position adjustment mechanism on the frame to adjust the horizontal tilt position of the air conditioner outdoor unit's support legs, simulating when the air conditioner outdoor unit is installed on a surface with a certain slope;

[0016] 3. By setting cylinder one to start and cylinder two to be in the reset state, the active drive mechanism drives the driven drive mechanism two, causing bracket A and bracket B to rotate in one direction, causing the microphone position to rotate, and collecting more data on the location of the sound source;

[0017] 4. By activating cylinder two while cylinder one is in the reset state, the active drive mechanism drives driven drive mechanism one and driven drive mechanism two, thereby allowing the baffle to move upward along the clearance groove. At the same time, bracket A and bracket B rotate in opposite directions, thereby changing the distance between the microphone and the outdoor unit of the air conditioner. The position can be adaptively adjusted as the position of the baffle changes, and more data on the location of the sound source of the outdoor unit of the air conditioner under different usage environments can be collected.

[0018] 5. Insert plates of various materials into the slots of the baffle to provide experimental data of the outdoor unit of the air conditioner under various installation environmental conditions;

[0019] 6. By setting up various mechanical components, this invention improves the reliability of test data. Attached Figure Description

[0020] Figure 1 This is a schematic diagram showing the state when the present invention is in use.

[0021] Figure 2 This is a schematic diagram of the structure of the present invention.

[0022] Figure 3 This is a schematic diagram of the frame and position adjustment mechanism in this invention.

[0023] Figure 4 This is a schematic diagram of the position adjustment mechanism in this invention.

[0024] Figure 5 , 6 This is a schematic diagram showing the connection relationship of the driven drive mechanism 1, the driven drive mechanism 2, and the active drive mechanism at different angles in this invention.

[0025] Among them, 1-frame, 2-air conditioner outdoor unit, 3-microphone, 4-vibration damping pad, 5-gap groove, 6-baffle, 7-driven drive mechanism one, 8-driven drive mechanism two, 9-active drive mechanism, 10-stabilizing bar, 11-threaded rod, 12-slider one, 13-slider two, 14-driven gear one, 15-stand, 16-driven gear two, 17-active gear, 18-motor one, 19-cylinder one, 20-cylinder two, 21-clamp 21-Clamping piece 2, 22-Driven gear 3, 23-Driven gear component, 24-Bracket A, 25-Bracket B, 26-Fixed shaft, 27-Arc rack A, 28-Arc rack B, 29-Gear, 30-Connector, 31-Slot, 32-Insertion plate, 33-Position adjustment mechanism, 34-Push handle, 35-Universal wheel, 36-Base plate, 37-Support plate, 38-Support plate, 39-Rotating shaft, 40-Cam, 41-Motor 2, 42-Support block. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0027] like Figures 1 to 6 As shown, a testing method for a noise testing device for vibration damping materials used in an air conditioner outdoor unit includes a frame 1 placed in a semi-anechoic chamber. A push handle 35 is mounted on the side of the frame 1, and casters 36 are provided at its bottom. An air conditioner outdoor unit 2 is placed on the frame 1. Microphones 3 are arranged around the air conditioner outdoor unit 2. Vibration damping pads 4 are bolted to the lower ends of the legs of the air conditioner outdoor unit 2. The microphones 3 are electrically connected to a noise vibration testing and analysis system and provide the system with collected noise sources. The noise vibration testing and analysis system is used to compare and analyze the data differences of noise sources of the air conditioner outdoor unit 2 under different environmental operating modes and before and after using vibration damping materials 4. The frame 1 is provided with a position adjustment mechanism 34 to change the horizontal position of the legs of the air conditioner outdoor unit 2.

[0028] In this embodiment, the frame 1 has four symmetrically arranged clearance slots 5 around the outdoor unit 2 of the air conditioner. The clearance slots 5 are equipped with retractable baffles 6. The lower end of the frame 1 is equipped with a driven mechanism 7 that drives the baffles 6 to move up and down in the clearance slots 5. The position of the microphone 3 is adjustable and can adaptively adjust with the change of the position of the baffles 6. The lower end of the frame 1 is also equipped with a driven mechanism 8 that drives the microphone 3 to change position. The bottom plate of the frame 1 is equipped with an active drive mechanism 9 to drive the driven mechanism 7 and the driven mechanism 8 to move.

[0029] In this embodiment, the driven drive mechanism 7 includes a stabilizing rod 10 installed between the top plate and the bottom plate of the frame 1 and a threaded rod 11 rotatably connected between the top plate and the bottom plate of the frame 1. The outer side of the baffle 6 is provided with a slider 12 and a slider 23. The slider 12 is sleeved on the outside of the stabilizing rod 10, and the slider 23 is sleeved on the outside of the threaded rod 11. The slider 23 has a threaded hole that cooperates with the threaded rod 11. The driven gear 14 is sleeved on the stabilizing rod 10, and the driven gear component 24 is sleeved on the threaded rod 11.

[0030] In this embodiment, the driven gear 24 includes gears 30 at both ends and a connecting member 31 in the middle.

[0031] In this embodiment, the active drive mechanism 9 includes a stand 15 mounted on the base plate of the frame 1. The lower end of the stand 15 is rotatably connected to a driven gear 16. A drive gear 17 is provided below the driven gear 16. The drive gear 17 is connected to the output shaft of a motor 18. The motor 18 is mounted on the base plate of the frame 1. The base plate of the frame 1 is provided with cylinders 19 and 20 distributed on both sides of the driven gear 16. Cylinder 19 is provided with a clamping plate 21 in the shape of "]". Cylinder 20 is provided with a clamping plate 22 in the shape of "]". A driven gear 23 is rotatably connected to the clamping plate 22.

[0032] In this embodiment, the top plate and bottom plate of the first clamp 21 are located on the upper and lower sides of the driven gear 14, respectively, and the top plate and bottom plate of the second clamp 22 are located on the upper and lower sides of the driven gear 24, respectively.

[0033] In this embodiment, the driven drive mechanism 2 8 includes a bracket A25 and a bracket B26 rotatably connected to the microphone 3. The lower ends of the bracket A25 and the bracket B26 are rotatably connected to a fixed shaft 27. The fixed shaft 27 is mounted on the base plate of the frame 1. The bracket A25 is provided with an arc-shaped rack A28, and the bracket B26 is provided with an arc-shaped rack B29. The arc-shaped rack A28 meshes with the driven gear 2 16, and the arc-shaped rack B29 meshes with the driving gear 17.

[0034] In this embodiment, the baffle 6 has a slot 32, into which insert plates 33 of different materials can be inserted.

[0035] In this embodiment, the position adjustment mechanism 34 includes two symmetrical base plates 37 mounted on the frame 1. A support plate 38 and a rotating shaft 39 are rotatably connected between the two base plates 37. A cam 40 is provided on the rotating shaft 39. The edge of the cam 40 abuts against the lower end of the support plate 38. One end of the rotating shaft 39 is connected to the output shaft of a second motor 41. The second motor 41 is mounted on one of the base plates 37. A support block 42 is also provided on the frame 1. When the surface of the support plate 38 is parallel to the upper surface of the frame 1, its height is the same as the height of the support block 42.

[0036] Motor 2 41, the four motors corresponding to the four sides of the air conditioner outdoor unit 2, namely Motor 1 18, Cylinder 1 19, and Cylinder 2 20, are all electrically connected to the PLC controller.

[0037] Working process and principle: Before the test, the tester pushes the device into the semi-anechoic chamber using the push handle 35. The bottom of the device is equipped with casters 36, which facilitates moving it to a suitable position. Then, the outdoor unit 2 of the air conditioner is placed on the frame 1. Specifically, vibration damping material 4 is first installed on the support screws of the outdoor unit 2, and then the outdoor unit 2 with vibration damping material 4 is placed on the support plate 38 and the support block 42.

[0038] During the test, the outdoor unit 2 of the air conditioner is turned on, and the microphone 3 provides the collected sound sources to the noise and vibration test analysis system. The system compares and analyzes the data differences of the noise sources of the outdoor unit 2 under different environmental operating modes and before and after the use of vibration damping material 4.

[0039] According to the test requirements, adjust the horizontal tilt position of the support feet of the air conditioner outdoor unit 2 to simulate the noise data of the air conditioner outdoor unit 2 after installation on a surface with a certain slope. Start motor 2 41, drive the rotating shaft 39 to rotate, thereby driving the cam 40 to rotate and the support plate 38 to rotate, thereby adjusting the horizontal position of the support feet of the air conditioner outdoor unit 2. After adjustment, start the air conditioner outdoor unit 2, and the microphone 3 provides the collected sound source to the noise vibration test and analysis system for analysis.

[0040] According to the test requirements, the position of the microphone 3 to collect sound source is changed to provide data source for data comparison and analysis of differences. The cylinder 19 is started, so that the clamp 21 on the cylinder 19 drives the driven gear 14 to move upward along the stabilizer 10 until it meshes with the active gear 17 and the driven gear 16. At this time, the motor 18 is started, which drives the active gear 17 to rotate, so that the driven gear 14 and the driven gear 16 rotate. At this time, the active gear 17 and the driven gear 16 rotate in the same direction. Therefore, the arc rack B29 meshing with the active gear 17 and the arc rack A28 meshing with the driven gear 16 rotate in the same direction, thereby driving the bracket A25 and the bracket B26 to rotate in one direction, causing the position of the microphone 3 to rotate.

[0041] According to the testing requirements, it is necessary to raise the baffle 6 around the outdoor unit 2 in a certain direction, and start the motor 18 and cylinder 20 in that direction, with cylinder 19 in the reset state to avoid interference. Starting cylinder 20 causes the clamp 22 at the upper end of cylinder 20 to drive the driven gear 24 to move axially upward along the threaded rod 11 until the upper gear 30 meshes with the driven gear 26. The driven gear 33 meshes with the driving gear 17 and the lower gear 30 of the driven gear 24. At this time, starting motor 18 causes the driving gear 17 to rotate. Therefore, driven gear 33, driven gear 24, and driven gear 26 all rotate, with the driving gear 17 rotating in opposite directions to driven gear 216. The rotation of the driven gear 24 causes the threaded rod 11 to rotate, thereby driving the slider 13 connected to the threaded rod 11 to move upward along the relief groove 5 with the baffle 6. At the same time, since the driving gear 17 and the driven gear 16 rotate in opposite directions, the arc rack B29 meshing with the driving gear 17 and the arc rack A28 meshing with the driven gear 16 both rotate in opposite directions, thereby driving the bracket A25 and the bracket B26 to rotate in opposite directions, thus causing the distance between the microphone 3 and the outdoor unit 2 of the air conditioner to change.

[0042] Depending on the testing requirements, a test plate 33 of the required test material can be inserted into the slot 32 of the baffle 6 to provide more experimental data.

[0043] 1. This invention collects the location and decibel of the sound source by setting up microphones 3 around the outdoor unit 2 of the air conditioner. The noise and vibration test and analysis system is used to compare and analyze the differences in the noise source data of the outdoor unit 2 under different operating modes and before and after the use of vibration damping material 4, so as to provide more data for the research on the performance of vibration damping pads.

[0044] 2. The present invention collects noise data by setting a position adjustment mechanism 34 on the frame 1 to adjust the horizontal tilt position of the support legs of the air conditioner outdoor unit 2, simulating when the air conditioner outdoor unit 2 is installed on a surface with a certain slope;

[0045] 3. By setting the starting cylinder 19 and the cylinder 20 in the reset state, the active drive mechanism 9 drives the driven drive mechanism 8, causing the bracket A25 and the bracket B26 to rotate in one direction, causing the microphone 3 to rotate, and collecting more data on the location of the sound source.

[0046] 4. By starting cylinder 20 and cylinder 19 being in the reset state, the active drive mechanism 9 drives the driven drive mechanism 7 and driven drive mechanism 8, so that the baffle 6 can move upward along the relief groove 5, and at the same time, the bracket A25 and bracket B26 rotate in opposite directions, thereby changing the distance between the microphone 3 and the air conditioner outdoor unit 2. The position can be adaptively adjusted as the position of the baffle 6 changes, and more sound source position data can be collected.

[0047] 5. Insert the insert plate 33 of the required test material into the slot 32 of the baffle 6 to provide experimental data of the outdoor unit 2 under various installation environment conditions.

[0048] As is known from common technical knowledge, this invention can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this invention or its equivalents are included in this invention.

Claims

1. A test method for a noise testing device for a vibration-damping material for an air conditioner outdoor unit, characterized by, The testing device includes a frame (1) placed in a semi-anechoic chamber. The frame (1) has push handles (35) installed on its side and casters (36) at its bottom. An air conditioner outdoor unit (2) is placed on the frame (1). Microphones (3) are arranged around the air conditioner outdoor unit (2). Vibration damping material (4) is bolted to the bottom of the support feet of the air conditioner outdoor unit (2). The microphones (3) are electrically connected to a noise vibration test and analysis system and provide the system with collected noise sources. The noise vibration test and analysis system is used to compare and analyze the data differences of noise sources of the air conditioner outdoor unit (2) under different environmental operating modes and before and after using vibration damping material (4). The frame (1) is provided with a position adjustment mechanism (34) to change the horizontal position of the support feet of the air conditioner outdoor unit (2). The frame (1) has four symmetrically arranged clearance slots (5) around the outdoor unit (2) of the air conditioner. Each clearance slot (5) has a retractable baffle (6). The lower end of the frame (1) has a driven mechanism (7) that drives the baffle (6) to move up and down within the clearance slot (5). The position of the microphone (3) is adjustable and can adaptively adjust with the position of the baffle (6). The lower end of the frame (1) also has a driven mechanism (8) that drives the position of the microphone (3). The bottom plate of the frame (1) has an active drive mechanism (9) for driving the driven mechanisms (7) and (8). Movement; The position adjustment mechanism (34) includes two symmetrical base plates (37) mounted on the frame (1), and a support plate (38) and a rotating shaft (39) are rotatably connected between the two base plates (37). A cam (40) is provided on the rotating shaft (39), and the edge of the cam (40) abuts against the lower end of the support plate (38). One end of the rotating shaft (39) is connected to the output shaft of the second motor (41). The second motor (41) is mounted on one of the base plates (37). A support block (42) is also provided on the frame (1). When the surface of the support plate (38) is parallel to the upper surface of the frame (1), its height is the same as the height of the support block (42). The driven drive mechanism 1 (7) includes a stabilizing rod (10) installed between the top plate and the bottom plate of the frame (1) and a threaded rod (11) rotatably connected between the top plate and the bottom plate of the frame (1). The baffle (6) is provided with a slider 1 (12) and a slider 2 (13) on the outside. The slider 1 (12) is sleeved on the outside of the stabilizing rod (10), and the slider 2 (13) is sleeved on the outside of the threaded rod (11). The slider 2 (13) has a threaded hole that cooperates with the threaded rod (11). The stabilizing rod (10) is sleeved with a driven gear 1 (14), and the threaded rod (11) is sleeved with a driven gear component (24). The driven gear component (24) includes gears (30) at both ends and a connecting component (31) in the middle. The active drive mechanism (9) includes a stand (15) mounted on the base plate of the frame (1). The lower end of the stand (15) is rotatably connected to a driven gear two (16). A drive gear (17) is provided below the driven gear two (16). The drive gear (17) is connected to the output shaft of a motor one (18). The motor one (18) is mounted on the base plate of the frame (1). The base plate of the frame (1) is provided with cylinder one (19) and cylinder two (20) distributed on both sides of the driven gear two (16). Cylinder one (19) is provided with a "]" shaped clamp one (21). Cylinder two (20) is provided with a "]" shaped clamp two (22). A driven gear three (23) is rotatably connected to the clamp two (22). The top plate and bottom plate of the first (21) are located on the upper and lower sides of the driven gear (14), respectively. The top plate and bottom plate of the second clamp (22) are located on the upper and lower sides of the driven gear (24), respectively. The driven drive mechanism (8) includes a bracket A (25) and a bracket B (26) rotatably connected to the microphone (3). The lower ends of the bracket A (25) and the bracket B (26) are rotatably connected to the fixed shaft (27). The fixed shaft (27) is installed on the bottom plate of the frame (1). The bracket A (25) is provided with an arc-shaped rack A (28). The bracket B (26) is provided with an arc-shaped rack B (29). The arc-shaped rack A (28) meshes with the driven gear (16), and the arc-shaped rack B (29) meshes with the drive gear (17). The testing method of the testing device is as follows: Step 1: The tester pushes the device into the semi-anechoic chamber, first installs vibration damping material (4) on the support screws of the air conditioner outdoor unit (2), and then places the air conditioner outdoor unit (2) with vibration damping material (4) on the frame (1). Step 2: Start the outdoor unit of the air conditioner (2), and the microphone (3) provides the collected sound sources to the noise and vibration test analysis system. The system compares and analyzes the data differences of the noise sources of the outdoor unit of the air conditioner (2) under different environmental operating modes and before and after the use of vibration damping materials (4). Adjust the horizontal tilt position of the support feet of the air conditioner outdoor unit (2) to simulate the noise data of the air conditioner outdoor unit (2) after installation on a surface with a certain slope. Start the motor (41) to drive the rotating shaft (39) to rotate, thereby driving the cam (40) to rotate and the support plate (38) to rotate, thereby adjusting the horizontal position of the support feet of the air conditioner outdoor unit (2). After adjustment, start the air conditioner outdoor unit (2), and the microphone (3) provides the collected sound sources to the noise vibration test and analysis system for analysis. Change the position of the microphone (3) to collect sound source, provide data source for data comparison and analysis of differences, start cylinder one (19), the clamp one (21) on cylinder one (19) drives the driven gear one (14) to move upward along the stabilizer bar (10) until it meshes with the active gear (17) and the driven gear two (16), start motor one (18), drive the active gear (17) to rotate, the driven gear one (14) and the driven gear two (16) to rotate, the active gear (17) and the driven gear two (16) rotate in the same direction, the arc rack (B29) meshing with the active gear (17) and the arc rack (A28) meshing with the driven gear two (16) rotate in the same direction, thereby driving the bracket (A25) and the bracket (B26) to rotate in one direction, causing the position of the microphone (3) to rotate; When it is necessary to raise the baffle (6) around the outdoor unit (2) of the air conditioner in a certain direction, start the motor (18) and cylinder (20) in that direction, and keep cylinder (19) in the reset state to avoid interference. Start cylinder (20), and the clamp (22) at the upper end of cylinder (20) drives the driven gear (24) to move upward along the threaded rod (11) until the gear (30) at its upper end meshes with the driven gear (26). The driven gear (33) meshes with the driving gear (17) and the gear (30) at the lower end of the driven gear (24). Start motor (18), and the driving gear (17) rotates. The driven gear (33) and the driven gear (24) mesh with the driving gear (17) and the gear (30) at the lower end of the driven gear (24). Both the driven gear (24) and the driven gear (16) rotate, and the driving gear (17) and the driven gear (16) rotate in opposite directions. The driven gear (24) rotates, the threaded rod (11) rotates, and the slider (13) moves upward along the relief groove (5) with the baffle (6). At the same time, since the driving gear (17) and the driven gear (16) rotate in opposite directions, the arc rack (B29) and the arc rack (A28) rotate in opposite directions, thereby driving the bracket (A25) and the bracket (B26) to rotate in opposite directions. The distance between the microphone (3) and the air conditioner outdoor unit (2) changes, and the experimental data under different environmental operation modes are completed.

2. The testing method of the noise testing device for the damping material of the outdoor unit of the air conditioner according to claim 1, characterized in that: The baffle (6) has a slot (32) in which insert plates (33) of different materials can be inserted.

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