Muffling and damping structure for mechanical and electrical installation of building

Abstract

The invention provides a building electromechanical installation noise elimination and vibration reduction structure, and relates to the field of building electromechanical, the building electromechanical installation noise elimination and vibration reduction structure comprises two installation frames, an outdoor unit body arranged on the installation frames, and an installation plate fixedly connected to the bottom of the outdoor unit body, the installation plate and the installation frames are fixedly connected through bolts, and a vibration reduction ring piece is arranged between the installation plate and the installation frames; and the damping ring sheet is fixedly connected with the mounting plate. According to the noise elimination and vibration reduction structure for building mechanical and electrical installation, due to the arrangement of the vibration reduction ring piece, when an air conditioner outdoor unit operates, a compressor, a fan and other parts of the air conditioner outdoor unit can vibrate, the vibration energy can be absorbed by the vibration reduction ring piece, transmission of the vibration energy to a wall is reduced, and therefore noise is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of building electromechanical technology, in particular to a sound-absorbing and vibration-reducing structure for building electromechanical installation. Background Art

[0002] Air conditioning refers to equipment that uses artificial means to adjust and control parameters such as temperature, humidity, and flow rate of the ambient air in a building or structure. Air conditioning is an indispensable part of modern life. Air conditioning mainly consists of two parts: an indoor unit and an outdoor unit. The outdoor unit can cool down and dissipate the high-pressure and high-temperature gas discharged from the indoor unit through a fan outdoors. The condensed refrigerant liquid is then sent to the evaporator of the indoor unit through a capillary tube, and then evaporates into gas to absorb indoor heat, thereby achieving the effect of controlling the indoor temperature. Therefore, the outdoor unit generally needs to be installed outdoors through a bracket to facilitate gas exchange.

[0003] During the use of the air conditioner, the outdoor unit of the air conditioner will start randomly and intermittently to exhaust air outside. When the outdoor unit of the air conditioner is working, it will naturally generate noise. Depending on the degree of operation of the outdoor unit of the air conditioner and the degree of dust accumulation and aging of the air conditioner, the noise of some outdoor units of the air conditioner will be very loud, affecting the daily life of surrounding residents. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a noise reduction and vibration reduction structure for mechanical and electrical installation in a building, which solves the problems raised in the above-mentioned background technology.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a building electromechanical installation sound absorption and vibration reduction structure, including two mounting frames, an external machine body arranged on the mounting frames, and a mounting plate fixedly connected to the bottom of the external machine body, wherein the mounting plate and the mounting frames are fixedly connected by bolts, and a vibration-damping ring plate is arranged between the mounting plate and the mounting frame, and the vibration-damping ring plate is fixedly connected to the mounting plate.

[0008] Preferably, a through hole matching the bolt is opened at the center of the vibration-damping ring.

[0009] Preferably, a silencer mechanism for reducing the operating noise of the external unit body is provided on the outside of the external unit body, the silencer mechanism comprises a containing shell, a silencer cloth, a cover body, and a driving assembly, the containing shell is hollow, the mounting frame is arranged in the hollow part of the containing shell, the opening of the containing shell faces the external unit body, the opening of the containing shell is provided with a cover body matching the opening of the containing shell, the silencer cloth is arranged in a cylindrical shape, and one end of the silencer cloth is fixedly connected to the cover body, the other end of the silencer cloth extends into the containing shell and is fixedly connected to the bottom surface of the containing shell, and the mounting frame is provided with a driving assembly for driving the cover body to move toward the external unit body. Under normal circumstances, the silencer cloth is stored in the containing shell, and when in use, the driving assembly controls the cover body to move toward the external unit body, and the silencer cloth extends from the containing shell and surrounds the outside of the external unit body.

[0010] Preferably, the sound-absorbing cloth comprises a base cloth layer, a waterproof layer, and a sound-absorbing cotton layer. The outer side of the base cloth layer is fixedly connected to the waterproof layer, and the inner side of the base cloth layer is fixedly connected to the sound-absorbing cotton layer.

[0011] Preferably, the driving assembly includes a mounting seat, a screw, a driving motor, a sliding rod, a screw sleeve, a sliding sleeve, a first connecting rod, and a second connecting rod. The two mounting frames are symmetrically fixedly connected to the outer sides of the two mounting frames, the mounting seat on the left is fixedly connected to the sliding rod, and the mounting seat on the right is rotatably connected to the screw, the axis of the sliding rod and the axis of the screw are parallel to each other, the sliding rod is slidably fitted with a sliding sleeve, the sliding sleeve and the cover body are fixedly connected by the first connecting rod, the driving motor is fixedly connected to the mounting seat, the output end of the driving motor is coaxially connected to the screw, the screw is threadedly fitted with a screw sleeve, and the second connecting rod is fixedly connected between the screw sleeve and the cover body.

[0012] Preferably, the length of the screw rod is the same as the length of the sliding rod.

[0013] Preferably, the mounting seat and the mounting frame are connected by welding.

[0014] Preferably, it also includes a control mechanism for automatically unfolding the sound-absorbing cloth according to the working state of the external machine body, the control mechanism includes a first fixed box, a second fixed box, a first empty tube, a second empty tube, a first disc, a second disc, a roller, a rotating wheel, blades, a fixed plate, a movable plate, a spring, a single-chip microcomputer, a laser transmitter, and a laser receiver. The first fixed box and the second fixed box are fixedly connected to the front ends of the two mounting frames respectively, the first fixed box is fixedly connected to the inner side of the first fixed box with the first empty tube, the inner side of the second fixed box is fixedly connected to the second empty tube, the axes of the first empty tube and the second empty tube coincide, one end of the first empty tube away from the first fixed box is fixedly connected to the center of the first disc, one end of the second empty tube away from the second fixed box is fixedly connected to the center of the second disc, the first disc and the second disc have the same diameter, and the outer edges of the first disc and the second disc are rotatably connected to a plurality of rollers, the rotating wheel cooperates with the roller, the outer side of the rotating wheel is fixedly connected to a plurality of blades, the position of the blades corresponds to the air outlet of the external machine body, the inner fixed A fixed plate is fixedly connected, one end of the fixed plate is rotatably connected to a movable plate, one end of the spring is fixedly connected to the fixed plate, and the other end of the spring is fixedly connected to the movable plate. Under the action of the spring, the movable plate blocks and separates the first empty tube and the second empty tube. A laser transmitter is fixedly connected in the first fixed box, and a laser receiver and a single-chip microcomputer are fixedly connected in the second fixed box. The single-chip microcomputer is electrically connected to the laser receiver and the drive motor. The laser transmitter and the laser receiver are respectively arranged at the end of the first empty tube and the end of the second empty tube, and the laser transmitter and the laser receiver correspond to each other. When the external machine body is working, air is blown at the air outlet so that the blade drives the rotating wheel to rotate. When the rotating wheel rotates, under the action of centrifugal force, the movable plate overcomes the spring to cause the movable plate to deviate, so that the movable plate does not block the first empty tube and the second empty tube. At this time, the laser generated by the laser transmitter can pass through the first empty tube and the second empty tube to shoot onto the laser receiver. The laser receiver generates a signal to the single-chip microcomputer, and the single-chip microcomputer controls the drive motor to start, so that the drive motor controls the cover body to move and unfold the silencer cloth.

[0015] Preferably, the width of one end of the movable plate is greater than that of the other end, and the end of the movable plate with a smaller width is rotatably connected to the fixed plate, and an eccentric block is fixedly connected to one side of the wider end of the movable plate, so that the movable plate is easily offset when the rotating wheel rotates.

[0016] (III) Beneficial effects

[0017] The present invention provides a noise reduction and vibration reduction structure for mechanical and electrical installation of a building. It has the following beneficial effects:

[0018] 1. The building's electromechanical system is equipped with a sound-absorbing and vibration-reducing structure. Through the setting of vibration-reducing rings, when the air-conditioning outdoor unit is running, its compressor, fan and other components will vibrate. The vibration-reducing rings can absorb the vibration energy and reduce its transmission to the wall, thereby reducing the noise generated.

[0019] 2. The building's electromechanical installation sound-absorbing and vibration-reducing structure has a sound-absorbing mechanism. Under normal circumstances, the sound-absorbing cloth is stored in the containing shell to ensure that the sound-absorbing cloth will not be exposed to the outside world for a long time and will not be quickly aged and lose its effectiveness due to long-term wind and sun exposure. When in use, the drive assembly controls the cover to move toward the external unit body, and the sound-absorbing cloth extends from the containing shell and surrounds the outside of the external unit body, thereby effectively blocking and absorbing the noise generated by the air-conditioning outdoor unit, reducing the impact of noise on the surrounding environment, and improving the comfort of indoor and outdoor environments.

[0020] 3. The building electromechanical sound-absorbing and vibration-reducing structure is installed with a driving component. When in use, the driving motor drives the screw to rotate, so that the screw sleeve moves along the screw, and the screw sleeve drives the cover body to move through the second connecting rod, thereby driving the opening and closing of the cover body. The waterproof layer on the outside of the sound-absorbing cloth can ensure that the sound-absorbing cloth will not get wet when used on rainy days. The sound-absorbing cotton layer on the inside of the sound-absorbing cloth can effectively eliminate noise and reduce the impact of noise.

[0021] 4. The building's electromechanical sound-absorbing and vibration-reducing structure is installed with a control mechanism, which can automatically control whether the cover is open at any time according to the working status of the external unit body, to ensure that the cover can be automatically opened when the external unit is working, and closed when the external unit is not working to ensure the service life of the sound-absorbing cloth. In addition, by replacing springs with different spring constants, it can be suitable for different environments. The smaller the spring constant, the easier it is to deflect under the action of centrifugal force, and the more suitable it is for some noise-sensitive environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The structure of the present invention is shown in FIG. Figure 1 ;

[0023] Figure 2 The structure of the present invention is shown in FIG. Figure 2 ;

[0024] Figure 3 It is a schematic diagram of the structure of the sound-absorbing cloth of the present invention;

[0025] Figure 4 This is a schematic diagram of the mounting frame structure of the present invention;

[0026] Figure 5 The control mechanism structure of the present invention is shown in FIG. Figure 1 ;

[0027] Figure 6 The control mechanism structure of the present invention is shown in FIG. Figure 2 ;

[0028] Figure 7 This is a schematic diagram of the structure of the rotating wheel of the present invention;

[0029] Figure 8 It is a cross-sectional view of the control mechanism structure of the present invention;

[0030] Fig. 9 For the present invention Figure 1 A magnified view of the structure in the middle.

[0031] In the figure: 1 external machine body, 2 mounting frame, 3 mounting plate, 4 vibration reduction ring, 5 containing shell, 6 cover, 7 sound-absorbing cloth, 8 control mechanism, 9 mounting seat, 10 sliding rod, 11 screw rod, 12 driving motor, 13 sliding sleeve, 14 screw sleeve, 15 first connecting rod, 16 second connecting rod, 17 first fixing box, 18 second fixing box, 19 first empty tube, 20 second empty tube, 21 laser transmitter, 22 laser receiver, 23 single chip microcomputer, 24 first disc, 25 second disc, 26 rotating wheel, 27 blade, 28 roller, 29 movable plate, 30 fixed plate, 31 spring. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0033] The embodiment of the present invention provides a noise reduction and vibration reduction structure for mechanical and electrical installation of a building, such as Figure 1-9 As shown, it includes two mounting frames 2, an external machine body 1 arranged on the mounting frames 2, and a mounting plate 3 fixedly connected to the bottom of the external machine body 1. The mounting plate 3 and the mounting frames 2 are fixedly connected by bolts, and a vibration-damping ring plate 4 is arranged between the mounting plate 3 and the mounting frames 2, and the vibration-damping ring plate 4 is fixedly connected to the mounting plate 3.

[0034] By setting the vibration-damping ring piece 4, when the air-conditioning outdoor unit is running, its compressor, fan and other components will vibrate, and the vibration-damping ring piece 4 can absorb the vibration energy and reduce its transmission to the wall, thereby reducing the generation of noise.

[0035] A through hole matching the bolt is provided at the center of the vibration-damping ring plate 4 .

[0036] In some embodiments, Figure 1-4As shown, a silencer mechanism for reducing the operating noise of the external machine body 1 is arranged on the outside of the external machine body 1, and the silencer mechanism includes a containing shell 5, a silencer cloth 7, a cover body 6, and a driving assembly. The containing shell 5 is hollow, and the mounting frame 2 is arranged in the hollow part of the containing shell 5, and the opening of the containing shell 5 faces the external machine body 1. The opening of the containing shell 5 is provided with a cover body 6 matching the opening of the containing shell 5, and the silencer cloth 7 is arranged in a cylindrical shape, and one end of the silencer cloth 7 is fixedly connected to the cover body 6, and the other end of the silencer cloth 7 extends into the containing shell 5 and is fixedly connected to the bottom surface of the containing shell 5. A driving assembly for driving the cover body 6 to move toward the external machine body 1 is arranged on the mounting frame 2. Under normal circumstances, the silencer cloth 7 is stored in the containing shell 5. When in use, the driving assembly controls the cover body 6 to move toward the external machine body 1, and the silencer cloth 7 extends from the containing shell 5 and surrounds the outside of the external machine body 1.

[0037] In some embodiments, Figure 3 As shown, the sound-absorbing cloth 7 includes a base cloth layer 71 , a waterproof layer 72 , and a sound-absorbing cotton layer 73 . The waterproof layer 72 is fixedly connected to the outer side of the base cloth layer 71 , and the sound-absorbing cotton layer 73 is fixedly connected to the inner side of the base cloth layer 71 .

[0038] By setting the silencer mechanism, under normal conditions, the silencer cloth 7 is stored in the containing shell 5, ensuring that the silencer cloth 7 will not be exposed to the outside world for a long time and will not be rapidly aged and lose its effectiveness due to long-term wind and sun exposure. When in use, the driving component controls the cover body 6 to move toward the external unit body 1, and the silencer cloth 7 extends from the containing shell 5 and surrounds the outside of the external unit body 1, thereby effectively blocking and absorbing the noise generated by the air conditioner outdoor unit, reducing the impact of noise on the surrounding environment, and improving the comfort of indoor and outdoor environments.

[0039] In some embodiments, Figure 1-4 As shown, the driving assembly includes a mounting seat 9, a screw 11, a driving motor 12, a sliding rod 10, a screw sleeve 14, a sliding sleeve 13, a first connecting rod 15, and a second connecting rod 16. The outer sides of the two mounting frames 2 are symmetrically fixedly connected with the mounting seats 9, the mounting seat 9 on the left is fixedly connected with the sliding rod 10, and the mounting seat 9 on the right is rotatably connected with the screw 11. The axis of the sliding rod 10 and the axis of the screw 11 are parallel to each other. The sliding rod 10 is slidably fitted with a sliding sleeve 13, and the sliding sleeve 13 and the cover body 6 are fixedly connected by the first connecting rod 15. The driving motor 12 is fixedly connected to the mounting seat 9, and the output end of the driving motor 12 is coaxially connected with the screw 11. The screw 11 is threadedly fitted with a screw sleeve 14, and the second connecting rod 16 is fixedly connected between the screw sleeve 14 and the cover body 6.

[0040] By setting the driving assembly, when in use, the driving motor 12 drives the screw 11 to rotate, so that the screw sleeve 14 moves along the screw 11, and the screw sleeve 14 drives the cover body 6 to move through the second connecting rod 16, thereby driving the opening and closing of the cover body 6. By setting the waterproof layer 72 on the outside of the sound-absorbing cloth 7, it can be ensured that the sound-absorbing cloth 7 will not get wet when used on rainy days. By setting the sound-absorbing cotton layer 73 on the inside of the sound-absorbing cloth 7, the noise can be effectively eliminated and the impact of the noise can be reduced.

[0041] The length of the screw rod 11 is the same as that of the sliding rod 10 .

[0042] The mounting seat 9 and the mounting frame 2 are connected by welding.

[0043] In some embodiments, Figure 5-8As shown, it also includes a control mechanism 8 for automatically unfolding the silencer cloth 7 according to the working state of the external machine body 1, and the control mechanism 8 includes a first fixed box 17, a second fixed box 18, a first empty tube 19, a second empty tube 20, a first disc 24, a second disc 25, a roller 28, a rotating wheel 26, a blade 27, a fixed plate 30, a movable plate 29, a spring 31, a single-chip microcomputer 23, a laser transmitter 21, and a laser receiver 22. The first fixed box 17 and the second fixed box 18 are respectively fixedly connected to the front ends of the two mounting frames 2, and the inner side of the first fixed box 17 is fixedly connected to the first empty tube 19, and the inner side of the second fixed box 18 is fixedly connected to the second The first and second empty tubes 20 are arranged such that the axes of the first and second empty tubes 19 and 20 coincide with each other, one end of the first empty tube 19 away from the first fixing box 17 is fixedly connected to the center of the first disc 24, and one end of the second empty tube 20 away from the second fixing box 18 is fixedly connected to the center of the second disc 25. The diameters of the first and second discs 24 and 25 are the same, and the outer edges of the first and second discs 24 and 25 are both rotatably connected to a plurality of rollers 28, a rotating wheel 26 is matched with the roller 28, a plurality of blades 27 are fixedly connected to the outer side of the rotating wheel 26, and the position of the blades 27 corresponds to the air outlet of the external machine body 1, and a fixing plate 3 is fixedly connected to the inner side of the rotating wheel 26 0, one end of the fixed plate 30 is rotatably connected to the movable plate 29, one end of the spring 31 is fixedly connected to the fixed plate 30, and the other end of the spring 31 is fixedly connected to the movable plate 29. Under the action of the spring 31, the movable plate 29 blocks and separates the first empty tube 19 and the second empty tube 20. The laser transmitter 21 is fixedly connected in the first fixed box 17, and the laser receiver 22 and the single-chip microcomputer 23 are fixedly connected in the second fixed box 18. The single-chip microcomputer 23 is electrically connected to the laser receiver 22 and the drive motor 12. The laser transmitter 21 and the laser receiver 22 are respectively arranged at the end of the first empty tube 19 and the end of the second empty tube 20, and the laser transmitter 21 and the laser receiver 22 correspond to each other. When the outer machine body 1 is working, air is blown at the air outlet, so that the blades 27 drive the rotating wheel 26 to rotate. When the rotating wheel 26 rotates, under the action of centrifugal force, the movable plate 29 overcomes the spring 31 to make the movable plate 29 offset, so that the movable plate 29 does not block the first empty tube 19 and the second empty tube 20. At this time, the laser generated by the laser transmitter 21 can pass through the first empty tube 19 and the second empty tube 20 to shoot at the laser receiver 22. The laser receiver 22 generates a signal to the single-chip microcomputer 23, and the single-chip microcomputer 23 controls the drive motor 12 to start, so that the drive motor 12 controls the cover body 6 to move and unfold the noise-absorbing cloth 7.

[0044] Through the setting of the control mechanism 8, whether the cover body 6 is opened can be automatically controlled at any time according to the working state of the external machine body 1, ensuring that the cover body 6 can be automatically opened when the external machine is working, and when the external machine is not working, the cover body 6 is closed to ensure the service life of the sound-absorbing cloth 7, and by replacing the spring 31 with different spring 31 constants, it can be suitable for environments in different situations. The smaller the spring 31 constant, the easier it is to deflect under the action of centrifugal force, and the more suitable it is for some noise-sensitive environments.

[0045] In some embodiments, Figure 7 As shown, the width of one end of the movable plate 29 is greater than the width of the other end, and the end of the movable plate 29 with a smaller width is rotatably connected to the fixed plate 30, and an eccentric block is fixedly connected to one side of the wider end of the movable plate 29, so that the movable plate 29 is easily deflected when the rotating wheel 26 rotates. The centrifugal force can make it easier to drive the movable plate 29 to deflect.

[0046] Working principle: through the setting of the vibration-damping ring piece 4, when the air-conditioning outdoor unit is running, its compressor, fan and other components will vibrate, and the vibration-damping ring piece 4 can absorb the vibration energy and reduce its transmission to the wall, thereby reducing the noise generation.

[0047] 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 noise reduction and vibration reduction structure for mechanical and electrical installation in a building, comprising two mounting frames (2), an external machine body (1) arranged on the mounting frames (2), and a mounting plate (3) fixedly connected to the bottom of the external machine body (1), characterized in that: The mounting plate (3) and the mounting frame (2) are fixedly connected by bolts, and a vibration-damping ring plate (4) is provided between the mounting plate (3) and the mounting frame (2), and the vibration-damping ring plate (4) is fixedly connected to the mounting plate (3).

2. A noise reduction and vibration reduction structure for mechanical and electrical installation of a building according to claim 1, characterized in that: A through hole matching the bolt is provided at the center of the vibration-damping ring plate (4).

3. A noise reduction and vibration reduction structure for mechanical and electrical installation of a building according to claim 2, characterized in that: The outer side of the external machine body (1) is provided with a muffler mechanism for reducing the operating noise of the external machine body (1), the muffler mechanism comprising a housing shell (5), a muffler cloth (7), a cover body (6), and a drive assembly, the housing shell (5) is hollow, the mounting frame (2) is arranged in the hollow part of the housing shell (5), the opening of the housing shell (5) faces the external machine body (1), the opening of the housing shell (5) is provided with a cover body (6) matching the opening of the housing shell (5), the muffler cloth (7) is arranged in a cylindrical shape, and the muffler One end of the cloth (7) is fixedly connected to the cover body (6), and the other end of the sound-absorbing cloth (7) extends into the accommodating shell (5) and is fixedly connected to the bottom surface of the accommodating shell (5). The mounting frame (2) is provided with a driving component for driving the cover body (6) to move in the direction of the external machine body (1). Under normal conditions, the sound-absorbing cloth (7) is stored in the accommodating shell (5). When in use, the driving component controls the cover body (6) to move in the direction of the external machine body (1), and the sound-absorbing cloth (7) extends from the accommodating shell (5) and surrounds the outside of the external machine body (1).

4. A noise reduction and vibration reduction structure for mechanical and electrical installation of a building according to claim 3, characterized in that: The sound-absorbing cloth (7) comprises a base cloth layer (71), a waterproof layer (72), and a sound-absorbing cotton layer (73); the waterproof layer (72) is fixedly connected to the outer side of the base cloth layer (71), and the sound-absorbing cotton layer (73) is fixedly connected to the inner side of the base cloth layer (71).

5. A noise reduction and vibration reduction structure for mechanical and electrical installation of a building according to claim 4, characterized in that: The driving assembly comprises a mounting seat (9), a screw rod (11), a driving motor (12), a sliding rod (10), a screw sleeve (14), a sliding sleeve (13), a first connecting rod (15), and a second connecting rod (16). The mounting seats (9) are symmetrically fixedly connected to the outer sides of the two mounting frames (2). The sliding rod (10) is fixedly connected to the mounting seat (9) on the left side, and the screw rod (11) is rotatably connected to the mounting seat (9) on the right side. The axis of the sliding rod (10) and the axis of the screw rod (11) are The axes are parallel to each other, a sliding sleeve (13) is slidably matched on the sliding rod (10), the sliding sleeve (13) and the cover body (6) are fixedly connected via a first connecting rod (15), the driving motor (12) is fixedly connected to the mounting seat (9), the output end of the driving motor (12) is coaxially connected to the screw rod (11), a screw sleeve (14) is threadedly matched on the screw rod (11), and a second connecting rod (16) is fixedly connected between the screw sleeve (14) and the cover body (6).

6. A noise reduction and vibration reduction structure for mechanical and electrical installation of a building according to claim 5, characterized in that: The length of the screw rod (11) is the same as the length of the sliding rod (10).

7. A noise reduction and vibration reduction structure for mechanical and electrical installation of a building according to claim 6, characterized in that: The mounting seat (9) and the mounting frame (2) are connected by welding.

8. A noise reduction and vibration reduction structure for mechanical and electrical installation of a building according to claim 7, characterized in that: The device also includes a control mechanism (8) for automatically unfolding the sound-absorbing cloth (7) according to the working state of the external machine body (1), the control mechanism (8) including a first fixing box (17), a second fixing box (18), a first empty tube (19), a second empty tube (20), a first disc (24), a second disc (25), a roller (28), a rotating wheel (26), a blade (27), a fixing plate (30), a movable plate (29), a spring (31), a single-chip microcomputer (23), a laser transmitter (21), and a laser receiver (22), the first fixing box (17) and the second fixing box (18) being fixedly connected to the front ends of the two mounting frames (2), respectively, and the inner side of the first fixing box (17) being fixedly connected to the inner side of the first fixing box (17). A first empty tube (19) is provided, and a second empty tube (20) is fixedly connected to the inner side of the second fixed box (18), the axes of the first empty tube (19) and the second empty tube (20) coincide with each other, one end of the first empty tube (19) away from the first fixed box (17) is fixedly connected to the center of a first circular disk (24), and one end of the second empty tube (20) away from the second fixed box (18) is fixedly connected to the center of a second circular disk (25), the first circular disk (24) and the second circular disk (25) have the same diameter, and the outer edges of the first circular disk (24) and the second circular disk (25) are rotatably connected to a plurality of rollers (28), the rotating wheel (26) cooperates with the roller (28), and the rotating wheel (26) A plurality of blades (27) are fixedly connected to the outside, and the positions of the blades (27) correspond to the air outlet of the external machine body (1). A fixed plate (30) is fixedly connected to the inside of the rotating wheel (26), and one end of the fixed plate (30) is rotatably connected to a movable plate (29). One end of the spring (31) is fixedly connected to the fixed plate (30), and the other end of the spring (31) is fixedly connected to the movable plate (29). Under the action of the spring (31), the movable plate (29) blocks and separates the first empty tube (19) and the second empty tube (20). A laser transmitter (21) is fixedly connected to the inside of the first fixed box (17), and a laser receiver (22) is fixedly connected to the inside of the second fixed box (18). ) and a single chip microcomputer (23), the single chip microcomputer (23) is electrically connected to the laser receiver (22) and the driving motor (12), the laser transmitter (21) and the laser receiver (22) are respectively arranged at the end of the first empty tube (19) and the end of the second empty tube (20), and the laser transmitter (21) and the laser receiver (22) correspond to each other, when the external machine body (1) is working, air is blown at the air outlet, so that the blade (27) drives the rotating wheel (26) to rotate, when the rotating wheel (26) rotates, under the action of centrifugal force, the movable plate (29) overcomes the spring (31) so that the movable plate (29) is offset, so that the movable plate (29) does not block the first empty tube (19) and the second empty tube (20),At this time, the laser light generated by the laser transmitter (21) can pass through the first empty tube (19) and the second empty tube (20) and be emitted to the laser receiver (22). The laser receiver (22) generates a signal to the single chip microcomputer (23). The single chip microcomputer (23) controls the drive motor (12) to start, so that the drive motor (12) controls the cover body (6) to move and unfold the sound-absorbing cloth (7).

9. A noise reduction and vibration reduction structure for mechanical and electrical installation of a building according to claim 8, characterized in that: The width of one end of the movable plate (29) is greater than the width of the other end, and the end of the movable plate (29) with a smaller width is rotatably connected to the fixed plate (30). An eccentric block is fixedly connected to one side of the wider end of the movable plate (29), so that the movable plate (29) is easily offset when the rotating wheel (26) rotates.

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