An active silencing VAV air system that ensures NC indicators for indoor environments

Abstract

The present invention belongs to the technical field of VAV air systems, and specifically relates to an active silencing VAV air system that ensures the NC index of an indoor environment, including a main body component, the inner cavity of which is connected to a circulation component; a circulation component, the circulation component includes a fan component, the inner cavity of which is provided with a regulating component; a diversion component, the diversion component includes a driving component arranged in the inner cavity of the main body component, the bottom of the driving component is connected to a pipeline component; a noise reduction component, the noise reduction component is arranged in the inner cavity of the main body component. The invention can adjust the angle of the fan component blades when the air flow rate changes, thereby reducing the noise generated by the contact and friction between the blades and the air, and can also divert the air into three parts, thereby weakening the air flow rate, and blowing the air out evenly, improving comfort and stability, and can monitor the frequency of the noise when the device is running, and generate reverse sound waves to offset the noise, actively reducing the noise emitted by the device operation.

Description

Technical Field

[0001] The invention belongs to the technical field of VAV air systems, and in particular relates to an active silencing VAV air system for ensuring NC indicators of indoor environments. Background Art

[0002] In modern building environments, air conditioning systems (such as variable air volume systems, or VAV) play a vital role. They are not only responsible for regulating indoor temperature, but also for ensuring air quality and comfort. However, traditional VAV air systems often generate a lot of noise during operation, which has a negative impact on user comfort and experience. The noise control (NC) index is an important parameter for measuring the indoor environmental noise level. A high NC index often means a poor acoustic environment, which is not conducive to user health and work efficiency.

[0003] First, the fan design of traditional systems often ignores the effective control of noise, especially when running at high wind speeds, the vortex and airflow disturbance generated by the interaction between the blades and the air are the main sources of noise. Although fan noise reduction technology has developed in recent years, such as improving the impeller structure and adding voltage stabilizing components, most of these methods can only reduce noise to a certain extent and fail to fundamentally solve the problem.

[0004] Secondly, most of the existing VAV noise reduction methods adopt passive methods, such as setting sound insulation materials, adding silencers, etc. Although these methods are effective, they often increase the complexity and cost of the system, and the noise reduction effect is limited.

[0005] Finally, traditional VAV air systems often have problems with uneven air flow distribution during the air supply process, which not only affects the energy efficiency of the system, but may also lead to uneven distribution of indoor temperature and humidity, reducing comfort. Summary of the invention

[0006] The purpose of the present invention is to provide an active silencing VAV air system that ensures the NC index of the indoor environment. When the air flow rate changes, the angle of the fan assembly blades can be adjusted to reduce the noise generated by the contact and friction between the blades and the air. The air can also be diverted into three parts, thereby weakening the air flow rate and blowing the air out evenly to improve comfort and stability. The frequency of the noise can be monitored when the device is running, and reverse sound waves can be generated to offset the noise, actively reducing the noise emitted by the operation of the device.

[0007] The technical solution adopted by the present invention is as follows: An active silencing VAV air system for ensuring the NC index of an indoor environment comprises a main body component, wherein the inner cavity of the main body component is connected to a flow component; A circulation component, the circulation component includes a fan component, and the inner cavity of the fan component is provided with a regulating component; A flow diversion component, the flow diversion component includes a driving component disposed in the inner cavity of the main component, and the bottom of the driving component is connected to a pipeline component; A noise reduction component, wherein the noise reduction component is disposed in the inner cavity of the main body component; Wherein, after the main body component is connected to the air, the fan component is used to adjust the air flow rate; When the air flow rate of the fan assembly is too fast, the driving assembly drives the regulating assembly to rotate, and adjusts the blade part of the fan assembly to rotate; The air is discharged from the pipeline component after being diverted by the driving component, and the noise reduction component is used for active noise reduction.

[0008] In a preferred embodiment, the main body assembly includes a body, a touch screen is fixedly mounted on the middle of the front of the body, an air intake pipe is fixedly connected to the top of the body, and a sound absorbing panel is fixedly connected to the inner wall of the air intake pipe.

[0009] In a preferred embodiment, the fan assembly includes a bracket fixedly connected to the inner cavity of the air inlet pipe, a motor 1 is fixedly installed on the top of the bracket, a turntable is fixedly connected to the output shaft of the motor 1, and the outer ring of the turntable is rotatably connected to multiple sets of fan blades.

[0010] In a preferred embodiment, the regulating component includes a gear fixedly connected to one end of the fan blade extending into the inner cavity of the turntable, the bottom of the inner cavity of the turntable is rotatably connected to a gear ring, the outer ring of the gear is meshed with the outer ring of the gear ring, the inner cavity of the gear ring is slidably connected to a hexagonal block, the middle part of the bottom surface of the hexagonal block is fixedly connected to a driving tube, the inner ring of the bottom surface of the hexagonal block is provided with a positioning groove, the bottom of the inner cavity of the turntable is fixedly connected to a positioning rod, the top outer ring of the positioning rod is movably inserted in the positioning groove, the top of the inner cavity of the turntable is fixedly connected to a spring, the bottom end of the spring is fixedly connected to a push plate, and the bottom surface of the push plate is in contact with the middle part of the top surface of the hexagonal block.

[0011] In a preferred embodiment, the driving assembly includes an isolation plate fixedly connected to the bottom of the inner cavity of the air intake pipe, the top of the isolation plate is movably sleeved with a lifting plate, an electric push rod 1 is fixedly installed in the middle of the inner cavity of the isolation plate, the top output end of the electric push rod 1 is fixedly connected to the top of the inner cavity of the lifting plate, a motor 2 is fixedly installed in the inner cavity of the lifting plate, a drive shaft is fixedly connected to the output shaft of the motor 2, and the drive shaft is arranged below the driving pipe.

[0012] In a preferred embodiment, the pipeline assembly includes an air supply pipe opened at the bottom of the isolation area of ​​the isolation plate, the air supply pipe is fixedly connected to the inner cavity of the machine body, the outer ring of the air supply pipe is fixedly connected to a shock-absorbing pad, the bottom end of the air supply pipe is connected to an air blowing plate, the outlet of the air blowing plate is connected to the outlet of the machine body, and the upper and lower sides of the inner cavity of the air blowing plate are fixedly connected to damping pads.

[0013] In a preferred embodiment, the noise reduction component includes a microphone fixedly connected to the inner cavity of the machine body, the data cable of the microphone extends into the machine body, a sound wave generator is arranged at the bottom of the inner cavity of the machine body, the bottom front of the sound wave generator is electrically connected to a cable, the bottom end of the cable is electrically connected to the bottom of the inner cavity of the machine body, the bottom surface of the sound wave generator is fixedly connected to an electric push rod 2, the bottom end of the electric push rod 2 is fixedly installed on the bottom of the inner cavity of the machine body, the left and right sides of the bottom surface of the sound wave generator are fixedly connected to limit rods, and the limit rods are slidably connected to the bottom of the inner cavity of the machine body.

[0014] In a preferred embodiment, the material of the damping pad installation parts on the upper and lower sides of the blowing plate is the same as that of the damping pad.

[0015] In a preferred embodiment, the top surfaces of the housing and the bracket on which the motor is installed are both provided with guide grooves.

[0016] In a preferred embodiment, the inner cavity of the driving tube is provided with a hexagonal groove, and the top outer ring of the driving shaft is also configured to be hexagonal.

[0017] The technical effects achieved by the present invention are: The fan assembly, regulating assembly and driving assembly of the present invention can adjust the angle of the fan assembly blades when the air flow rate changes, thereby reducing the noise generated by the contact and friction between the blades and the air; in the process of air circulation, the driving part of the fan assembly drives its blade part to rotate to adjust the air circulation speed. If the air flow rate is too fast, the driving part of the driving assembly rises and contacts the driving part of the regulating assembly and drives it to rotate. The driving part of the regulating assembly drives its linkage part to rotate, and the linkage part drives the blade part of the fan assembly to rotate and adjust the angle, so that the angle between the blade part and the axis of the fan assembly becomes smaller, the area of ​​friction with the air is reduced, the turbulence intensity and mechanical vibration are reduced, and the noise generation is reduced. If the flow rate is too low, the angle of the driving blade part becomes larger, the stability of air guidance is improved, and the poor adhesion of the airflow at low speed is prevented to generate noise; The drive assembly and pipeline assembly of the present invention can divide the air into three parts after it enters the main assembly, thereby reducing the air flow rate and blowing the air out evenly, improving comfort and stability; after the air enters the main assembly through the fan assembly, it is divided into three parts by the drive assembly and enters the pipeline assembly, at which time the damping part of the pipeline assembly completely wraps the pipeline part to avoid noise caused by pipeline vibration, and at the same time, the damping parts on the upper and lower sides of the blowing part of the pipeline assembly also damp the blowing part to avoid excessive vibration and noise, thereby reducing the noise generated when the device is running; The noise reduction component of the present invention can monitor the frequency of noise when the device is running, and generate reverse sound waves to offset the noise, thereby actively reducing the noise generated by the device during operation; when the device is running, the sound receiving part of the noise reduction component will monitor the noise generated inside the device in real time, and offset the noise by emitting sound waves with a phase opposite to the noise waveform through the sound wave generating part, and at the same time, the lifting part of the noise reduction component will drive its sound wave generating part to move up and down, so as to approach the part where the noise is strongly generated, thereby improving the noise reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a top view schematic diagram of the main body component in the present invention; Figure 3 is a schematic diagram of the position of the fan assembly in the present invention; Figure 4 is a cross-sectional schematic diagram of a fan assembly in the present invention; Figure 5 is a schematic diagram of the position of the regulatory components in the present invention; Figure 6 It is a schematic diagram of the splitting of the regulatory components in the present invention; Figure 7 It is a schematic diagram of the position of the push plate in the present invention; Figure 8 is a positional relationship diagram of the gear ring and the hexagonal block in the present invention; Fig. 9 It is a schematic diagram of the position of the driving component in the present invention; Fig.10 is a cross-sectional schematic diagram of a drive assembly in the present invention; Fig.11 It is a schematic diagram of the position of the air supply pipe in the present invention; Fig.12 It is a structural schematic diagram of the air delivery pipe in the present invention; Fig.13 is a cross-sectional schematic diagram of the pipeline assembly in the present invention; Fig.14 is a schematic diagram of the position of the noise reduction component in the present invention; Fig.15 It is a structural schematic diagram of the noise reduction component in the present invention.

[0019] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 10. Main assembly; 11. Machine body; 12. Touch screen; 13. Inlet pipe; 14. Sound absorbing board; 20. Circulation assembly; 21. Fan assembly; 211. Bracket; 212. Motor 1; 213. Turntable; 214. Fan blade; 22. Control assembly; 221. Gear; 222. Gear ring; 223. Hexagonal block; 224. Driving pipe; 225. Positioning slot; 226. Positioning rod; 227. Spring; 228 , push plate; 30, diversion assembly; 31, drive assembly; 311, isolation plate; 312, lifting plate; 313, electric push rod one; 314, motor two; 315, drive shaft; 32, pipeline assembly; 321, air supply pipe; 322, shock pad; 323, air blowing plate; 324, damping pad; 40, noise reduction assembly; 41, microphone; 42, sound wave generator; 43, cable; 44, electric push rod two; 45, limit rod. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The phrase "in a preferred embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0023] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0024] Please see attached Figures 1 to 15 As shown, this embodiment provides an active silencing VAV air system that ensures the NC index of the indoor environment, including a main body component 10, and the inner cavity of the main body component 10 is connected to a flow component 20; A circulation component 20, the circulation component 20 comprises a fan component 21, and an inner cavity of the fan component 21 is provided with a regulating component 22; The flow dividing component 30 includes a driving component 31 disposed in the inner cavity of the main component 10, and the bottom of the driving component 31 is connected to a pipeline component 32; A noise reduction component 40, which is disposed in the inner cavity of the main component 10; After the main component 10 is connected to the air, the fan component 21 is used to adjust the air flow rate; When the air flow rate of the fan assembly 21 is too fast, the driving assembly 31 drives the regulating assembly 22 to rotate, and adjusts the blade part of the fan assembly 21 to rotate; The air is discharged from the pipeline component 32 after being diverted by the driving component 31 , and the noise reduction component 40 is used for active noise reduction.

[0025] In this embodiment, when the main component 10 is connected to the air, the driving part of the fan component 21 drives its blades to rotate and guide the flow direction and flow rate of the air. If the air flow rate is too fast, the angle of the blade part will be reduced accordingly through the regulating function of the regulating component 22 to reduce the area of ​​contact with the air, reduce the turbulence intensity and mechanical vibration, and thus reduce the noise. In addition, the diversion effect of the driving component 31 can evenly distribute the air to the pipeline component 32, ensure the stability and uniformity of the air flow, and further improve the comfort of the indoor environment. The shock-absorbing part of the pipeline component 32 can effectively wrap the pipeline to avoid the noise caused by vibration. At the same time, the vibration reduction design of its blowing part can also reduce the vibration noise caused by the impact of airflow. The noise reduction component 40 generates corresponding reverse sound waves for noise cancellation by real-time monitoring and analysis of the noise frequency, and actively reduces the noise generated during the operation of the system. The lifting part of the noise reduction component 40 can adjust the position of the sound wave generating component according to the noise intensity to achieve the best noise reduction effect. Through the collaborative work of these components, a quiet and comfortable living and working space is provided for users.

[0026] Next, please refer to Figures 1 to 8 The main assembly 10 includes a body 11, a touch screen 12 is fixedly installed in the middle of the front of the body 11, an air intake pipe 13 is fixedly connected to the top of the body 11, and a sound absorbing panel 14 is fixedly connected to the inner wall of the air intake pipe 13; The fan assembly 21 includes a bracket 211 fixedly connected to the inner cavity of the air inlet pipe 13, a motor 212 is fixedly installed on the top of the bracket 211, a rotating disk 213 is fixedly connected to the output shaft of the motor 212, and the outer ring of the rotating disk 213 is rotatably connected to multiple sets of fan blades 214; The regulating component 22 includes a gear 221 fixedly connected to one end of the fan blade 214 extending into the inner cavity of the rotating disk 213, a gear ring 222 is rotatably connected to the bottom of the inner cavity of the rotating disk 213, the outer ring of the gear 221 is meshed with the outer ring of the gear ring 222, the inner cavity of the gear ring 222 is slidably connected to a hexagonal block 223, a driving tube 224 is fixedly connected to the middle of the bottom surface of the hexagonal block 223, a positioning groove 225 is provided on the inner ring of the bottom surface of the hexagonal block 223, a positioning rod 226 is fixedly connected to the bottom of the inner cavity of the rotating disk 213, the outer ring of the top end of the positioning rod 226 is movably inserted in the positioning groove 225, a spring 227 is fixedly connected to the top of the inner cavity of the rotating disk 213, a push plate 228 is fixedly connected to the bottom end of the spring 227, and the bottom surface of the push plate 228 is contact-connected to the middle of the top surface of the hexagonal block 223; The housing on which the motor 1 212 is installed and the top surface of the bracket 211 are both provided with guide grooves, which are intended to reduce contact with the air and avoid excessive friction with the air that causes increased noise; The inner cavity of the driving tube 224 is provided with a hexagonal groove, and the top outer ring of the driving shaft 315 is also configured as a hexagon, so that the driving shaft 315 can drive the driving tube 224 to rotate.

[0027] It should be noted that a valve is provided at the top of the air intake pipe 13 (not shown in the figure, and it is a common structure in the prior art, so no further description is given here), which is intended to control the air intake amount; Wind speed sensors (not shown in the figure) are provided on the inner wall of the air inlet pipe 13 at the upper and lower sides of the fan blade 214 to detect the difference in wind speed and adjust the angle of the fan blade 214 according to the wind speed: At low wind speeds (0.5-2 m / s), the angle between the fan blade 214 and the axis of the motor 212 is 20°-25°, which enhances airflow guidance and prevents noise caused by poor airflow adhesion at low speeds; At medium wind speeds (2-5 m / s), the angle of the fan blades 214 is 10°-15°, which optimizes aerodynamic performance and reduces high-frequency noise caused by pressure fluctuations; At high wind speeds (>5 m / s), the angle of the fan blades 214 is 5°~10°, which reduces the force-bearing area of ​​the wind wheel and reduces turbulence intensity and mechanical vibration; The gear ring 222 and the gear 221 are circular and conical, respectively, in order to improve the fit of the meshing and avoid the vibration and noise generated by the fan blades 214 when they rotate; The portion where the gear ring 222 is connected to the rotating disk 213 is provided with a damping shaft, which is intended to improve the stability of the gear ring 222 during rotation and facilitate the positioning of the positioning groove 225 and the positioning rod 226; Sound-absorbing cotton (not shown in the figure, this is a common structure in the prior art and will not be described in detail) is fixedly installed in the inner cavity wall of the body 11 to reduce the transmission of noise.

[0028] In this embodiment, after the air enters the air intake pipe 13, the sound absorbing plate 14 isolates and absorbs the noise in the air intake pipe 13 to reduce the transmission of the noise. Then the motor 212 drives the turntable 213 to rotate, and the fan blades 214 rotate accordingly, thereby guiding the air flow. The rotation speed of the turntable 213 and the angle of the fan blades 214 are adjusted in real time according to the information fed back by the wind speed sensor on the inner wall of the air intake pipe 13 to adapt to different wind speed conditions and ensure the efficiency and quiet effect of air flow. When the air flow rate is too fast, the driving part of the driving component 31 will rise and connect with the driving pipe 224, and at the same time push the hexagonal block 223 to rise, so that the positioning groove 225 is separated from the positioning rod 226, and then the driving pipe 224 and the hexagonal block 223 rotate, driving the gear ring 222 to rotate, and the gear 221 rotates accordingly, and then adjusts the angle of the fan blades 214 to reduce the contact area with the air, reduce the turbulence intensity and mechanical vibration, so as to achieve the purpose of reducing noise. Then the drive assembly 31 is disengaged from the drive tube 224, and the spring 227 rebounds, causing the push plate 228 and the hexagonal block 223 to drop, so that the positioning groove 225 is sleeved on the outer ring of the positioning rod 226 for fixation, to prevent the hexagonal block 223 from rotating arbitrarily during subsequent use, resulting in an unstable angle of the fan blade 214.

[0029] Next, please refer to Figures 9 to 13 The driving assembly 31 includes an isolation plate 311 fixedly connected to the bottom of the inner cavity of the air inlet pipe 13, a lifting plate 312 is movably sleeved on the top of the isolation plate 311, an electric push rod 1 313 is fixedly installed in the middle of the inner cavity of the isolation plate 311, the top output end of the electric push rod 1 313 is fixedly connected to the top of the inner cavity of the lifting plate 312, a motor 2 314 is fixedly installed in the inner cavity of the lifting plate 312, a driving shaft 315 is fixedly connected to the output shaft of the motor 2 314, and the driving shaft 315 is arranged below the driving pipe 224; The pipeline assembly 32 includes an air supply pipe 321 opened at the bottom of the isolation area of ​​the isolation plate 311, the air supply pipe 321 is fixedly connected to the inner cavity of the body 11, the outer ring of the air supply pipe 321 is fixedly connected to a shock-absorbing pad 322, the bottom end of the air supply pipe 321 is connected to an air blowing plate 323, the outlet of the air blowing plate 323 is connected to the outlet of the body 11, and the upper and lower sides of the inner cavity of the air blowing plate 323 are fixedly connected to damping pads 324; The material of the parts where the damping pad 324 is installed on the upper and lower sides of the blowing plate 323 is the same as that of the damping pad 324 .

[0030] It should be noted that the top of the isolation plate 311 is movably sleeved in the inner cavity of the lifting plate 312, so that after the lifting plate 312 rises, the separated air will not flow back again, so as to avoid affecting the air circulation and increasing the noise; A guide groove is provided on the top of the lifting plate 312 to reduce noise generated by contact with air.

[0031] In this embodiment, when adjusting the angle of the fan blade 214, the electric push rod 1 313 will push the lifting plate 312 and the drive shaft 315 upward, so that the drive shaft 315 is inserted into the drive tube 224, and the motor 2 314 is running at the same time, driving the drive shaft 315 and the drive tube 224 to rotate, and assisting in adjusting the angle of the fan blade 214. When the air moves downward through the fan blade 214, it is divided into three parts through the lifting plate 312, and enters the air supply pipe 321 through the isolation plate 311, and then enters the air blowing plate 323 through the air supply pipe 321 and blows out. During operation, the shock absorbing pad 322 wraps the air supply pipe 321 to prevent the air supply pipe 321 from vibrating and generating large noise. At the same time, the damping pad 324 will also damp the air blowing plate 323 to prevent the air blowing plate 323 from vibrating and generating noise, thereby reducing the noise generated when the device is running.

[0032] Next, please refer to Figure 14 to Figure 15 The noise reduction component 40 includes a microphone 41 fixedly connected to the inner cavity of the body 11, and the data line of the microphone 41 extends into the body 11. A sound wave generator 42 is arranged at the bottom of the inner cavity of the body 11. The front of the bottom of the sound wave generator 42 is electrically connected to a cable 43, and the bottom end of the cable 43 is electrically connected to the bottom of the inner cavity of the body 11. An electric push rod 44 is fixedly connected to the bottom of the inner cavity of the body 11, and the bottom end of the electric push rod 44 is fixedly installed on the bottom of the inner cavity of the body 11. Limit rods 45 are fixedly connected to the left and right sides of the bottom surface of the sound wave generator 42, and the limit rods 45 are slidably connected to the bottom of the inner cavity of the body 11.

[0033] It should be noted that the cable 43 is a spiral wire, and is intended to ensure that when the sound wave generator 42 moves, the cable 43 will not affect its movement.

[0034] In this embodiment, during the operation of the device, the microphone 41 will monitor the noise generated in the device in real time and transmit the sound wave data to the sound wave generator 42. The sound wave generator 42 generates a sound wave with a phase opposite to the noise data captured by the microphone 41, and reduces the noise through the cancellation principle. The electric push rod 44 moves up and down according to the needs of the sound wave generator 42 to ensure that the sound wave generator 42 can be accurately aligned with the noise source, thereby improving the noise reduction effect. The function of the limit rod 45 is to limit the movement range of the sound wave generator 42 to ensure that it works in a safe and effective area. Through this active noise reduction technology, the system can effectively reduce the noise generated during the air flow and ensure that the NC index of the indoor environment reaches an ideal state.

[0035] The working principle of the present invention is as follows: after the air enters the air intake pipe 13, the sound absorbing plate 14 isolates and absorbs the noise in the air intake pipe 13, reducing the transmission of the noise, and then the motor 212 drives the turntable 213 to rotate, and the fan blades 214 rotate accordingly, thereby guiding the air flow. The rotation speed of the turntable 213 and the angle of the fan blades 214 are adjusted in real time according to the information fed back by the wind speed sensor on the inner wall of the air intake pipe 13 to adapt to different wind speed conditions and ensure the efficiency of air flow and the quiet effect. When the air flow rate is too fast, the electric push rod 1 313 will push the lifting plate 312 and the driving shaft 315 up, so that the driving shaft 315 is inserted into the driving tube 224, and at the same time push the hexagonal block 223 up, so that the positioning groove 225 is disengaged from the positioning rod 226, and then the motor 2 314 runs, driving the driving shaft 315 to rotate, so that the driving tube 224 and the hexagonal block 223 rotate, driving the gear ring 222 to rotate, and the gear 221 rotates accordingly, and then adjusts the angle of the fan blade 214 to reduce the contact area with the air, reduce the turbulence intensity and mechanical vibration, so as to achieve the purpose of reducing noise. When the air moves downward through the fan blade 214, it is divided into three parts through the lifting plate 312, and enters the air supply pipe 321 through the isolation plate 311, and then enters the air blowing plate 323 through the air supply pipe 321 and blows out. During operation, the shock-absorbing pad 322 wraps the air supply pipe 321 to prevent the air supply pipe 321 from vibrating and generating large noise. At the same time, the damping pad 324 will also damp the air blowing plate 323 to prevent the air blowing plate 323 from vibrating and generating noise. At the same time, the microphone 41 will monitor the noise generated in the device in real time and transmit the sound wave data to the sound wave generator 42. The sound wave generator 42 generates a sound wave with an opposite phase to the noise data captured by the microphone 41, and reduces the noise through the cancellation principle. The electric push rod 2 44 moves up and down according to the needs of the sound wave generator 42 to ensure that the sound wave generator 42 can accurately align with the noise source, thereby improving the noise reduction effect.

[0036] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art unless otherwise specified and limited.

Claims

1. An active silencing VAV air system that ensures the NC index of the indoor environment, characterized by: include: A main body component (10), wherein an inner cavity of the main body component (10) is connected to a flow component (20); A circulation component (20), the circulation component (20) comprising a fan component (21), the inner cavity of the fan component (21) being provided with a regulating component (22); A flow diversion component (30), the flow diversion component (30) comprising a drive component (31) disposed in an inner cavity of the main body component (10), the bottom of the drive component (31) being connected to a pipeline component (32); A noise reduction component (40), wherein the noise reduction component (40) is arranged in the inner cavity of the main body component (10); Wherein, after the main body component (10) is connected to air, the fan component (21) is used to adjust the air flow rate; When the air flow rate of the fan assembly (21) is too fast, the driving assembly (31) drives the regulating assembly (22) to rotate, thereby adjusting the rotation of the blade portion of the fan assembly (21); The air is diverted through the driving component (31) and then discharged from the pipeline component (32), and the noise reduction component (40) is used for active noise reduction.

2. The active silencing VAV air system for ensuring the NC index of the indoor environment according to claim 1 is characterized in that: The main body component (10) comprises a body (11), a touch screen (12) is fixedly mounted on the middle of the front of the body (11), an air intake pipe (13) is fixedly connected to the top of the body (11), and a sound absorbing panel (14) is fixedly connected to the inner wall of the inner cavity of the air intake pipe (13).

3. The active silencing VAV air system for ensuring the NC index of the indoor environment according to claim 2 is characterized in that: The fan assembly (21) comprises a bracket (211) fixedly connected to the inner cavity of the air inlet pipe (13), a motor 1 (212) fixedly mounted on the top of the bracket (211), a rotating disk (213) fixedly connected to the output shaft of the motor 1 (212), and a plurality of sets of fan blades (214) rotatably connected to the outer ring of the rotating disk (213).

4. The active silencing VAV air system for ensuring the NC index of the indoor environment according to claim 3 is characterized in that: The regulating component (22) comprises a gear (221) fixedly connected to one end of the fan blade (214) extending into the inner cavity of the rotating disk (213); a gear ring (222) is rotatably connected to the bottom of the inner cavity of the rotating disk (213); the outer ring of the gear (221) is meshed with the outer ring of the gear ring (222); the inner cavity of the gear ring (222) is slidably connected to a hexagonal block (223); the middle of the bottom surface of the hexagonal block (223) is fixedly connected to a driving tube (224); the hexagonal block (223) is A positioning groove (225) is provided on the inner circle of the bottom surface of the rotating disk (223); a positioning rod (226) is fixedly connected to the bottom of the inner cavity of the rotating disk (213); the outer circle of the top end of the positioning rod (226) is movably inserted into the positioning groove (225); a spring (227) is fixedly connected to the top of the inner cavity of the rotating disk (213); a push plate (228) is fixedly connected to the bottom end of the spring (227); and the bottom surface of the push plate (228) is in contact with the middle part of the top surface of the hexagonal block (223).

5. The active silencing VAV air system for ensuring the NC index of the indoor environment according to claim 4 is characterized in that: The driving assembly (31) comprises an isolation plate (311) fixedly connected to the bottom of the inner cavity of the air intake pipe (13); the top of the isolation plate (311) is movably sleeved with a lifting plate (312); an electric push rod 1 (313) is fixedly installed in the middle of the inner cavity of the isolation plate (311); the top output end of the electric push rod 1 (313) is fixedly connected to the top of the inner cavity of the lifting plate (312); a motor 2 (314) is fixedly installed in the inner cavity of the lifting plate (312); a driving shaft (315) is fixedly connected to the output shaft of the motor 2 (314); and the driving shaft (315) is arranged below the driving pipe (224).

6. The active silencing VAV air system for ensuring the NC index of the indoor environment according to claim 5 is characterized in that: The pipeline assembly (32) comprises an air supply pipe (321) opened at the bottom of the isolation area of ​​the isolation plate (311); the air supply pipe (321) is fixedly connected to the inner cavity of the machine body (11); the outer ring of the air supply pipe (321) is fixedly connected to a shock-absorbing pad (322); the bottom end of the air supply pipe (321) is connected to an air blowing plate (323); the outlet of the air blowing plate (323) is connected to the outlet of the machine body (11); and the upper and lower sides of the inner cavity of the air blowing plate (323) are fixedly connected to damping pads (324).

7. The active silencing VAV air system for ensuring the NC index of the indoor environment according to claim 2 is characterized in that: The noise reduction component (40) comprises a microphone (41) fixedly connected to the inner cavity of the body (11), the data line of the microphone (41) extends into the body (11), a sound wave generator (42) is arranged at the bottom of the inner cavity of the body (11), the front of the bottom of the sound wave generator (42) is electrically connected to a cable (43), the bottom end of the cable (43) is electrically connected to the bottom of the inner cavity of the body (11), the bottom surface of the sound wave generator (42) is fixedly connected to an electric push rod 2 (44), the bottom end of the electric push rod 2 (44) is fixedly installed on the bottom of the inner cavity of the body (11), and the left and right sides of the bottom surface of the sound wave generator (42) are fixedly connected to limit rods (45), and the limit rods (45) are slidably connected to the bottom of the inner cavity of the body (11).

8. The active silencing VAV air system for ensuring the NC index of the indoor environment according to claim 6 is characterized in that: The material of the parts of the air blowing plate (323) on the upper and lower sides where the damping pad (324) is installed is the same as that of the damping pad (324).

9. The active silencing VAV air system for ensuring the NC index of the indoor environment according to claim 3 is characterized in that: The top surfaces of the housing on which the motor 1 (212) is installed and the bracket (211) are both provided with guide grooves.

10. The active silencing VAV air system for ensuring the NC index of the indoor environment according to claim 5, characterized in that: The inner cavity of the driving tube (224) is provided with a hexagonal groove, and the top outer ring of the driving shaft (315) is also configured to be hexagonal.

Images