CN115930422A - An indoor variable air volume terminal noise reduction device and its application method - Google Patents

Abstract

The invention relates to the technical field of noise reduction in hotel guest rooms, in particular to an indoor variable air volume terminal noise reduction device and its use method, including a wall and a fan coil assembly, the top of the fan coil assembly is fixedly connected with a suspender, the suspender The top is fixedly connected with the wall, the side of the fan coil unit is connected with a noise-absorbing static pressure box, the top of the noise-absorbing static pressure box is installed with a boom, the outside of the noise-absorbing static pressure box is connected with a connecting pipe, and the outside of the connecting pipe is provided with Fix the cylinder and the protective assembly, and the protective assembly passes through the wall; in the present invention, a layer of sound-insulating cotton and sound-reducing material is added around the outer frame of the fan coil shell, and a sound-absorbing material is added at the end row of the exhaust pipe of the fan coil shell. Acoustic plenum box, install a sound insulation cover on the outside of the fan, and set a vibration damping pad under the fan. This setting can reduce the draft air flow noise, motor noise and machine resonance noise generated by the internal parts of the fan coil unit, and control the noise. Provide customers with a comfortable environment within the allowable range.

Description

An indoor variable air volume terminal noise reduction device and its application method

technical field

The invention relates to the technical field of noise reduction in hotel guest rooms, in particular to an indoor variable air volume terminal noise reduction device and a use method thereof.

Background technique

With the development of economy and society and the improvement of income level, people have more and higher pursuit of production methods and quality of life. Hotels, as a place to provide leisure and entertainment for people, have developed rapidly, and guest rooms are the core of hotels. The heart is the area where guests stay the longest in the hotel, and it is also the top priority of the quality control of electromechanical installation.

However, the general guest rooms are equipped with coil fans, and the coil fans are equipped with motor-driven fan blades to rotate to generate a large amount of air, resulting in indoor air convection. The operating noise of the fans is generally around 60 decibels, which is acceptable normally, but In order to provide guests with a more comfortable sleeping environment and improve the grade of the hotel, it is necessary to improve the guest rooms. These noises are summed up to be composed of draft airflow noise, motor noise and machine resonance noise. In order to reduce these noises, an indoor variable air volume is proposed. A terminal noise reduction device and a method for using the same.

Contents of the invention

The object of the present invention is to provide an indoor variable air volume terminal noise reduction device and its usage method, so as to solve the problems raised in the above-mentioned background technology.

To achieve the above object, the present invention provides the following technical solutions:

As an alternative to the indoor variable air volume terminal noise reduction device and its use method described in the present invention, the indoor variable air volume terminal noise reduction device and its use method include a wall and a fan A coil unit, the top of the fan coil unit is fixedly connected with a suspender, and the top of the suspender is fixedly connected with the wall. A suspender is installed on the top of the pressure box, and a communication pipe is connected to the outside of the sound-absorbing static pressure box, and a fixed cylinder and a protective assembly are arranged on the outside of the communication pipe, the top of the fixed cylinder is fixedly connected to the suspender, and the protective assembly Passing through the wall, a silent component is installed on the front side of the fan coil unit.

The boom is used to connect the fan coil unit and the noise reduction static pressure box. When the air is entering, the noise reduction static pressure box can reduce the noise at the end of the air volume. At the same time, a layer of sound insulation material is added to the outside of the fan coil unit for noise reduction treatment, and the fixed cylinder is used to fix the connecting pipe. At the same time, when the fixed cylinder passes through the wall, it is provided with a The protective component serves the purpose of protecting the connecting pipe and has a certain noise reduction function.

As an alternative to the indoor variable air volume terminal noise reduction device and its use method of the present invention, wherein: the fan coil assembly includes a fan coil casing, a sound insulation cover and a fan, and the fan coil The outer side of the shell is fixedly connected with sound insulation cotton, the front side of the fan coil shell is fixedly connected with an air intake frame, the front side of the air intake frame is connected with a mute component, and the inside of the fan coil shell is fixedly connected with a sound insulation cover. An exhaust pipe is communicated with the outside of the soundproof cover, and the other end of the exhaust pipe is communicated with the noise-absorbing static pressure box;

The outer side of the sound insulation cover is connected with the air intake cover, and the outer side of the air intake cover is fixedly connected with a partition, and the outer side of the partition is fixedly connected with the fan coil shell. A layer of sound insulation cotton is added to reduce the transmission of airflow, wind noise and vibration noise when the fan is running inside the fan coil shell, so as to achieve the purpose of effective noise reduction. At the same time, because the fan generates noise during operation, sound insulation is installed on the outside of the fan. The cover is used to control the outward transmission of motor noise. The other end of the exhaust pipe is connected to the noise-absorbing static pressure box, which can weaken the noise. The partition is used to separate the fan coil shell. A chamber One is used to heat or cool the air, and the other chamber is used to ensure the normal circulation of air.

As an alternative to the indoor variable air volume terminal noise reduction device and its use method of the present invention, wherein: the inside of the fan coil shell is fixedly connected with a condensed water storage frame, and the condensed water storage The bottom of the water frame is connected with a condensed water output pipe. An exchanger is arranged above the condensed water storage frame. The bottom of the exchanger is connected with a first exchange pipe and a second exchange pipe. For heating or cooling, the first exchange tube and the second exchange tube are set to ensure the circulation of the internal water source, while water droplets are easily generated on the outside of the exchanger, and drip into the inside of the condensed water storage frame, and then pass through the condensed water output pipe Exhaust outside.

As an alternative to the indoor variable air volume terminal noise reduction device and its use method of the present invention, wherein: the sound insulation cover is provided with a fan inside, and the bottom of the fan is fixedly connected with a fixing plate, and fixed The bottom of the board is fixedly connected with the inner wall of the soundproof cover, and the setting of the soundproof cover can control the outward transmission of the motor noise of the fan, so as to achieve the purpose of effective noise reduction.

As an alternative to the indoor variable air volume terminal noise reduction device and its use method in the present invention, a vibration damping pad is provided between the fixed plate and the fan, and the upper part of the vibration damping pad is in contact with the The fan is in close contact, and the bottom of the vibration-damping pad is in close contact with the fixed plate. The noise of the fan is the resonance noise generated by the vibration of the fan when it is running. A vibration-damping pad is arranged below the fan. Noise caused by vibration.

As an alternative to the indoor variable air volume terminal noise reduction device and its use method in the present invention, wherein: the silent assembly includes an air guide frame, a sponge board and an air inlet channel, and the air guide frame The outer side is fixedly connected with the fan coil unit. The inside of the air guide frame is provided with a sponge board, and the inside of the sponge board is fixedly connected with uniformly distributed air inlet passages. The air can enter the interior through the sponge board and the air inlet passages. The air not only The supplementary air volume can be exhausted through the sponge board, and the setting of the sponge board can reduce vibration and noise for the air inlet channel.

As an alternative to the indoor variable air volume terminal noise reduction device and its use method in the present invention, wherein: the air inlet channel runs through both ends of the sponge board, and one side of the sponge board is provided with The baffle plate, and the outside of the baffle plate is fixedly connected with the air guide frame, the sponge board can be blocked from detaching from the air guide frame by the baffle plate, so as to limit the position.

As an alternative to the indoor variable air volume terminal noise reduction device and its use method of the present invention, wherein: the protective component includes a protective tube and a sponge tube, and the outer side of the protective tube is fixed to the wall. connection, the inside of the protective tube is equipped with a sponge tube, and the inside of the sponge tube is provided with a connecting tube, and the sponge tube is covered on the outside of the connecting tube, even if the connecting tube vibrates and is transmitted through the sponge tube, the noise can be greatly reduced, and The protective tube plays the purpose of protecting the connecting pipe.

As an alternative to the indoor variable air volume terminal noise reduction device and its use method described in the present invention, the use method is as follows:

Step 1: When noise reduction is performed on the interior of the hotel room, it is generally caused by the noise generated by the fan coil when it is started, which affects the experience quality of the guests;

Step 2: By adding a noise-absorbing static pressure box and a silent component in the air inlet and outlet sections of the fan coil unit, it is used to effectively reduce the noise of the fan coil unit, and the noise-absorbing static pressure box can also stabilize the wind speed;

Step 3: When performing noise reduction, add a sound insulation cover and a vibration damping pad on the outside of the fan to reduce the noise generated by the vibration of the fan;

Step 4: A protective component is provided on the outside of the connecting pipe, and the protective component is used to prevent the connecting pipe from directly contacting with the wall to vibrate and generate noise.

Compared with prior art, the beneficial effect of the present invention is:

In the present invention, when in use, a layer of sound-insulating cotton and sound-reducing material is added around the outer frame of the fan coil shell to reduce airflow noise and vibration noise transmission when the fan is running; The end operation is the most direct place where various noises are transmitted. At this time, a noise-absorbing static pressure box is added outside the exhaust pipe to weaken the noise; at the same time, the fan generates noise during operation. A sound insulation cover can be installed outside the fan to control the noise of the motor. External transmission; if the noise of the fan is the resonance noise generated by the vibration of the fan during operation, a vibration damping pad is installed under the fan to control the noise caused by the vibration of the fan. This setting not only achieves good economic benefits, but also ensures that the project quality, so that the room noise can be effectively controlled;

There is a sponge board and an air inlet channel at the air inlet. Air can enter the interior through the sponge board and the air inlet channel. The air can not only be discharged through the sponge board to supplement the air volume, but also the setting of the sponge board can provide shock absorption for the air inlet channel. noise reduction;

The protective tube and the sponge tube are provided, and the sponge tube is covered on the outside of the connecting pipe. Even if the connecting pipe vibrates and is transmitted through the sponge tube, the noise can be greatly reduced, and the protective tube serves to protect the connecting pipe.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of an indoor variable air volume terminal noise reduction device;

Fig. 2 is a structural schematic diagram of a fan coil unit of an indoor variable air volume terminal noise elimination and noise reduction device;

Fig. 3 is a structural schematic diagram of a silent component of an indoor variable air volume terminal noise elimination and noise reduction device;

Fig. 4 is a structural schematic diagram of a protective component of an indoor variable air volume terminal noise reduction device.

In the figure: 1, wall; 2, fan coil assembly; 201, fan coil shell; 202, sound insulation cover; 203, fan; 204, vibration damping pad; 205, fixed plate; 206, air inlet cover; Partition; 208, exhaust pipe; 209, exchanger; 210, condensed water storage frame; 211, first exchange pipe; 212, second exchange pipe; 213, condensed water output pipe; 214, sound insulation cotton; 215, Air intake frame; 3. Boom; 4. Mute component; 401. Air guide frame; 402. Sponge board; 403. Air intake channel; 404. Blocking plate; , fixed tube; 8, protective component; 801, protective tube; 802, sponge tube.

Detailed ways

Example 1:

Please refer to Fig. 1 and Fig. 2, the present invention provides a kind of technical scheme:

An indoor variable air volume terminal noise reduction device and its use method, comprising a wall 1 and a fan coil unit 2, the top of the fan coil unit 2 is fixedly connected to a suspender 3, and the top of the suspender 3 is connected to the wall 1 It is fixedly connected, the side of the above-mentioned fan coil unit 2 is connected with a noise-absorbing static pressure box 5, the top of the above-mentioned noise-absorbing static pressure box 5 is installed with a boom 3, and the outside of the above-mentioned noise-absorbing static pressure box 5 is connected with a communication pipe 6, And the outer side of the communication pipe 6 is provided with a fixed cylinder 7 and a protective component 8, the top of the fixed cylinder 7 is fixedly connected with the suspender 3, the protective component 8 passes through the wall 1, and the silent component is installed on the front side of the fan coil unit 2 4.

The above usage method is as follows:

Step 1: When noise reduction is performed on the interior of the hotel room, it is generally caused by the noise generated by the fan coil when it is started, which affects the experience quality of the guests;

Step 2: Adding a noise-absorbing static plenum 5 and a silent component 4 to the air inlet and outlet sections of the fan coil to effectively reduce the noise of the fan coil, and the noise-eliminating static plenum 5 can also stabilize the wind speed;

Step 3: When performing noise reduction, a sound insulation cover 202 and a vibration damping pad 204 are added on the outside of the fan 203 to reduce the noise generated by the vibration of the fan 203;

Step 4: A protective component 8 is provided on the outside of the connecting pipe 6, and the protective component 8 is used to prevent the connecting pipe 6 from directly contacting the wall 1 to vibrate and generate noise.

Generally, the guest rooms are equipped with coil fans, and the inside of the coil fans is driven by the motor to rotate the fan blades to generate a large amount of air, resulting in indoor air convection. The operating noise of the fans is generally around 60 decibels, which is acceptable normally, but for To ensure a more comfortable sleeping environment for guests and improve the grade of the hotel, it is necessary to improve the guest rooms. These noises are summed up to be composed of draft airflow noise, motor noise and machine resonance noise. By adding There is a layer of sound-proof cotton 214 sound-reducing material to reduce the airflow wind noise and vibration noise transmission when the fan 203 is running; at the same time, the operation at the end of the exhaust pipe 208 of the fan coil shell 201 is the most direct place for various noises to come out. At the same time, the sound-absorbing plenum box 5 is added on the outside of the exhaust pipe 208 to weaken the noise; meanwhile, the blower fan 203 produces noise during operation, and the sound insulation cover 202 can be installed on the outside of the blower blower 203 to control the outward transmission of the motor noise; if the noise of the blower blower 203 is For the resonance noise generated by the vibration of the motor during operation, a vibration damping pad 204 is provided under the fan 203 to control the noise caused by the vibration of the fan 203. The boom 3 is used to connect the fan coil unit 2 and the noise reduction static pressure box 5. The silent component 4 is used to deal with the noise generated when the wind enters, and the fixed cylinder 7 is used to fix the connecting pipe 6. At the same time, when the fixed cylinder 7 passes through the wall 1, it is installed inside the wall 1. The protection component 8 serves the purpose of protecting the connecting pipe 6, and has a certain noise reduction function. This setting can be used for the air draft noise, motor noise and machine resonance noise generated by the fan coil unit 2 in the guest room. Sexual treatment can effectively reduce the noise in the guest room and provide customers with a comfortable environment.

Example 2

This embodiment is an improvement made to Embodiment 1. Please refer to Fig. 1 and Fig. 2. Specifically, the above-mentioned fan coil assembly 2 includes a fan coil casing 201, a sound insulation cover 202 and a fan 203. The above-mentioned fan coil casing The outer side of 201 is fixedly connected with sound insulation cotton 214, the front side of the above-mentioned fan coil shell 201 is fixedly connected with the air intake frame 215, the front side of the above-mentioned air intake frame 215 is connected with the mute assembly 4, and the inside of the above-mentioned fan coil shell 201 is fixedly connected with a sound insulation Cover 202, the outside of the above-mentioned soundproof cover 202 is communicated with an exhaust pipe 208, and the other end of the exhaust pipe 208 is communicated with the noise-absorbing static pressure box 5;

The outside of the sound insulation cover 202 communicates with the air intake cover 206 , and the outside of the air intake cover 206 is fixedly connected with a partition 207 , and the outside of the above partition 207 is fixedly connected with the fan coil shell 201 .

When in use, because a layer of sound insulation cotton 214 is added outside the fan coil shell 201, it is used to reduce the airflow wind noise and vibration noise transmission when the fan inside the fan coil shell 201 is running, so as to achieve the purpose of effective noise reduction, and at the same time Because the blower fan 203 generates noise during operation, a soundproof cover 202 is installed on the outside of the blower fan 203 to control the outward propagation of the motor noise. 5, the centrifugal glass wool board is used for heat preservation, and the noise-absorbing static pressure box 5 can weaken the noise. The partition plate 207 is used to separate the fan coil shell 201, one chamber is used for heating or cooling the air, and the other chamber The room is used to ensure the normal circulation of air, and a layer of sound insulation material is arranged outside the exhaust pipe 208 for the purpose of noise reduction.

Example 3

This embodiment is an improvement made to Embodiment 1. Please refer to Fig. 1 and Fig. 2. Specifically, the condensed water storage frame 210 is fixedly connected inside the above-mentioned fan coil casing 201, and the bottom of the above-mentioned condensed water storage frame 210 A condensed water output pipe 213 is communicated with it, and an exchanger 209 is arranged above the condensed water storage frame 210 , and a first exchange pipe 211 and a second exchange pipe 212 are communicated at the bottom of the exchanger 209 .

The passing wind can be heated or cooled by the provided exchanger 209, and then the first exchange pipe 211 and the second exchange pipe 212 are provided to ensure the circulation of the internal water source, while the outside of the exchanger 209 is prone to produce water droplets, and drip into the inside of the condensed water storage frame 210 , and then be discharged outside through the condensed water output pipe 213 .

Example 4

This embodiment is an improvement made to Embodiment 3. Please refer to Fig. 1 and Fig. 2. Specifically, a fan 203 is arranged inside the above-mentioned soundproof cover 202, and a fixed plate 205 is fixedly connected to the bottom of the above-mentioned fan 203, and the fixed plate 205 The bottom is fixedly connected with the inner wall of the soundproof enclosure 202.

The soundproof cover 202 covers the outside of the fan 203, and at this time, the motor noise of the fan 203 can be controlled to spread outward, so as to achieve the purpose of effective noise reduction.

Example 5

This embodiment is an improvement made to Embodiment 4, please refer to Figure 1 and Figure 2, specifically, a vibration-damping pad 204 is provided between the above-mentioned fixed plate 205 and the fan 203, and the top of the vibration-damping pad 204 is in contact with the fan 203 is in close contact, and the bottom of the vibration-damping pad 204 is in close contact with the fixing plate 205 .

The noise of the blower fan 203 is the resonance noise generated by the vibration of the blower fan 203 during operation. The solution is to set a damping pad under the blower blower 203, which can weaken the noise caused by the blower blower 203 vibration.

Example 6

This embodiment is an improvement made to Embodiment 5. Please refer to Fig. 1 and Fig. 3. Specifically, the above-mentioned mute assembly 4 includes an air guide frame 401, a sponge board 402 and an air inlet channel 403, and the outside of the above-mentioned air guide frame 401 It is fixedly connected with the fan coil unit 2 , and the air guide frame 401 is provided with a sponge board 402 inside, and the inside of the sponge board 402 is fixedly connected with evenly distributed air inlet passages 403 .

Air can enter the interior through the sponge board 402 and the air inlet channel 403, the air can enter through the air inlet channel 403, and the air can be exhausted through the sponge board 402 to supplement the air volume, and the setting of the sponge board 402 can provide shock absorption for the air inlet channel 403 Noise reduction, while the air guide frame 401 is fixed on the fan coil shell 201 by screws, so that when the sponge board 402 is cleaned, the screws can be removed by turning the wrench for maintenance and cleaning.

Example 7

This embodiment is an improvement made to Embodiment 6, please refer to Figure 1 and Figure 3, specifically, the above-mentioned air inlet channel 403 runs through both ends of the sponge board 402, and one side of the above-mentioned sponge board 402 is provided with a blocking plate 404 , and the outer side of the blocking plate 404 is fixedly connected with the wind guide frame 401 .

The blocking plate 404 can prevent the sponge plate 402 from detaching from the air guide frame 401, so as to limit the position.

Example 8

This embodiment is an improvement made to Embodiment 7, please refer to Fig. 1 and Fig. 4, specifically, the above-mentioned protective assembly 8 includes a protective tube 801 and a sponge tube 802, and the outer side of the above-mentioned protective tube 801 is fixedly connected to the wall 1 , the inside of the protective tube 801 is provided with a sponge tube 802 , and the inside of the sponge tube 802 is provided with a connecting pipe 6 .

The sponge tube 802 is covered on the outside of the connecting pipe 6, even if the connecting pipe 6 vibrates, the noise can be greatly reduced after being conducted by the sponge tube 802, and the protective tube 801 serves the purpose of protecting the connecting pipe 6, preventing its connecting pipe from 6 damaged.

In this paper, specific examples are used to illustrate the principle and implementation of the present invention. The description of the above examples is only used to help understand the method and core idea of the present invention. The above is only a preferred embodiment of the present invention. It should be pointed out that due to the limitation of literal expression, there are objectively unlimited specific structures. Under these circumstances, several improvements, modifications or changes can also be made, and the above-mentioned technical features can also be combined in an appropriate manner; these improvements, modifications, or combinations, or the idea and technical solution of the invention can be directly applied to other occasions without improvement should be regarded as the protection scope of the present invention.

Claims (9)

1. An indoor variable air volume terminal noise reduction device, comprising a wall (1) and a fan coil unit (2), characterized in that: the top of the fan coil unit (2) is fixedly connected with a suspender (3 ), the top of the boom (3) is fixedly connected to the wall (1), and the side of the fan coil assembly (2) is communicated with a sound-absorbing static pressure box (5), and the sound-absorbing static pressure box ( The top of 5) is equipped with a boom (3), and the outside of the noise reduction static pressure box (5) is connected with a connecting pipe (6), and the outside of the connecting pipe (6) is provided with a fixed cylinder (7) and a protective assembly (8 ), the top of the fixed cylinder (7) is fixedly connected to the suspender (3), the protective component (8) passes through the wall (1), and the front side of the fan coil unit (2) is equipped with a silent component (4). 2. The indoor variable air volume terminal noise reduction device according to claim 1, characterized in that: the fan coil assembly (2) includes a fan coil shell (201), a sound insulation cover (202) and a fan coil (203), the outer side of the fan coil shell (201) is fixedly connected with sound insulation cotton (214), the front side of the fan coil shell (201) is fixedly connected with an air intake frame (215), and the air intake frame ( 215) is connected to the front side of the mute assembly (4), the inside of the fan coil shell (201) is fixedly connected to the sound insulation cover (202), and the outside of the sound insulation cover (202) is connected to the exhaust pipe (208), And the other end of the exhaust pipe (208) is communicated with the silencer static pressure box (5); The outside of the soundproof cover (202) is connected with an air intake cover (206), and the outside of the air intake cover (206) is fixedly connected with a partition (207), and the outside of the partition (207) is connected to the fan coil shell ( 201) is a fixed connection. 3. The indoor variable air volume terminal noise reduction device according to claim 2, characterized in that: a condensed water storage frame (210) is fixedly connected inside the fan coil shell (201), and the condensed water The bottom of the water storage frame (210) is connected with a condensed water output pipe (213), and an exchanger (209) is arranged above the condensed water storage frame (210), and the bottom of the exchanger (209) is connected with a first exchange tube (211) and the second exchange tube (212). 4. An indoor variable air volume terminal noise reduction device according to claim 2, characterized in that: the sound insulation cover (202) is provided with a fan (203) inside, and the bottom of the fan (203) is fixedly connected with The plate (205) is fixed, and the bottom of the plate (205) is fixedly connected to the inner wall of the soundproof cover (202). 5. An indoor variable air volume terminal noise reduction device according to claim 4, characterized in that: a vibration damping pad (204) is provided between the fixing plate (205) and the fan (203), and the damping pad (204) is The top of the vibration pad (204) is in close contact with the fan (203), and the bottom of the vibration-damping pad (204) is in close contact with the fixing plate (205). 6. The indoor variable air volume terminal noise reduction device according to claim 1, characterized in that: the silent component (4) includes an air guide frame (401), a sponge board (402) and an air inlet channel ( 403), the outer side of the air guide frame (401) is fixedly connected with the fan coil unit (2), the inside of the air guide frame (401) is provided with a sponge board (402), and the inside of the sponge board (402) is fixedly connected with Evenly distributed air inlet channels (403). 7. The indoor variable air volume terminal noise reduction device according to claim 6, characterized in that: the air inlet channel (403) runs through both ends of the sponge board (402), and the sponge board (402) A blocking plate (404) is provided on one side of the blocking plate (404), and the outer side of the blocking plate (404) is fixedly connected with the wind guide frame (401). 8. An indoor variable air volume terminal noise reduction device according to claim 1, characterized in that: the protective assembly (8) includes a protective tube (801) and a sponge tube (802), and the protective tube ( The outer side of 801) is fixedly connected with the wall (1), and the protective tube (801) is provided with a sponge tube (802), and the sponge tube (802) is provided with a connecting pipe (6). 9. The method for using an indoor variable air volume terminal noise reduction device according to any one of claims 1-8, characterized in that: The method of use is as follows: Step 1: When noise reduction is performed on the interior of the hotel room, it is generally caused by the noise generated by the fan coil when it is started, which affects the experience quality of the guests; Step 2: By adding the noise reduction static pressure box (5) and the silencer component (4) in the air inlet and outlet sections of the fan coil unit, it is used to effectively reduce the noise of the fan coil unit, and the noise reduction static pressure box (5) can also stable wind speed; Step 3: When performing noise reduction, a sound insulation cover (202) and a vibration damping pad (204) are added on the outside of the fan (203) to reduce the noise generated by the vibration of the fan (203); Step 4: A protective component (8) is provided on the outside of the connecting pipe (6), and the protective component (8) is used to prevent the connecting pipe (6) from directly contacting the wall (1) to vibrate and generate noise.

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