CN112885322A - Novel industrial noise reduction equipment - Google Patents
Novel industrial noise reduction equipment Download PDFInfo
- Publication number
- CN112885322A CN112885322A CN202110146735.5A CN202110146735A CN112885322A CN 112885322 A CN112885322 A CN 112885322A CN 202110146735 A CN202110146735 A CN 202110146735A CN 112885322 A CN112885322 A CN 112885322A
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- China
- Prior art keywords
- noise reduction
- box body
- reduction device
- plate
- damping
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/162—Selection of materials
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/023—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/08—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with rubber springs ; with springs made of rubber and metal
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20136—Forced ventilation, e.g. by fans
- H05K7/20172—Fan mounting or fan specifications
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Multimedia (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention relates to the technical field of noise reduction equipment, in particular to novel industrial noise reduction equipment which comprises a noise reduction device box body, a heat dissipation device, mechanical equipment, a damping device and a rubber carrying platform, wherein two groups of heat dissipation devices are symmetrically arranged on two sides of the noise reduction device box body; two sets of exhaust fans wind direction is unanimous, through two sets of exhaust fans simultaneous operation to make the air in the seal box flow with higher speed, make mechanical equipment obtain effectual cooling, secondly inhale the noise in the cotton absorption breather pipe of sound, prevent that heat abstractor from when ventilating the seal box, the noise flows, and heat abstractor's settlement not only realizes the cooling to mechanical equipment, the effectual pollution of having avoided the noise simultaneously.
Description
Technical Field
The invention relates to the technical field of noise reduction equipment, in particular to novel industrial noise reduction equipment.
Background
At present, the requirement of industrial park to the noise is stricter day by day, and great noise all exists in a lot of large-scale mechanical equipment, for example automatic cutting operation equipment, automatic operation equipment of polishing etc. equipment noise source, the noise that produces by equipment work itself firstly, secondly because equipment work produces vibrations, the vibrations of equipment can take place to touch with ground to produce the noise, how to provide a low noise, good, comfortable operational environment for workman has been compelled the eyelash.
At present, large-scale mechanical equipment is subjected to noise reduction in an isolation and sealing mode in a factory, but because the mechanical equipment vibrates greatly in the operation process and generates huge heat in the operation process, a common sealing device has a certain effect on blocking noise propagation, but cannot be applied to the vibration generated in the operation process of the mechanical equipment for a long time, and the sound insulation effect of the sealing device is increasingly poor along with the time, so that the novel industrial noise reduction equipment is provided for solving the problems.
Disclosure of Invention
The present invention is directed to a new industrial noise reduction device to solve the above problems.
In order to achieve the purpose, the invention provides the following technical scheme: a novel industrial noise reduction device comprises a noise reduction device box body, heat dissipation devices, mechanical equipment, a damping device and a rubber carrying platform, wherein two groups of heat dissipation devices are symmetrically arranged on two sides of the noise reduction device box body;
the box body of the noise reduction device comprises a closed box body, wherein a plurality of plate bodies are arranged on the closed box body, two groups of doors are symmetrically arranged on one side of the closed box body, and one end of each door is hinged with the closed box body through two groups of hinges.
Preferably, heat abstractor includes the breather pipe, sets up in the breather pipe and inhales the cotton mechanism of sound, inhales cotton mechanism one side of sound and sets up the exhaust fan, and exhaust fan one side sets up air cleaner.
Preferably, damping device includes the shock attenuation plate body, sets up the shock attenuation plate body on the rubber microscope carrier, and the equidistance sets up a plurality of inertia impact mechanism of preventing on the shock attenuation plate body, and inertia impact mechanism connects damper, and damper connects and accepts the board, accepts the board bilateral symmetry and sets up two sets of anti-shake mechanism to accept and set up mechanical equipment on the board.
Preferably, the plate body includes the casing, sets up in the casing and inhales the sound cotton, sets up the shutoff lid on the casing.
Preferably, inhale sound cotton mechanism and set up the iron wire mount including inhaling the sound cotton one, inhale the sound cotton one, fixed cover is established to the cover on the iron wire mount.
Preferably, the anti-shake mechanism includes the diaphragm, and the diaphragm is connected the shock attenuation plate body, and diaphragm one side equidistance sets up a plurality of guide pillars, and guide pillar one end sets up upright bearing, and upright bearing embedding diaphragm, the guide pillar other end pass the spring and be connected with the clamp plate, sets up the rubber pad on the clamp plate.
Preferably, the damping mechanism comprises a sliding rod, one end of the sliding rod is connected with the bearing plate, the other end of the sliding rod penetrates through the first spring to be provided with a vertical bearing, and the vertical bearing is embedded into the bearing plate.
Preferably, the inertia impact preventing mechanism comprises an oil pressure valve body, the bearing plate is connected with the oil pressure valve body, a buffer area is arranged in the oil pressure valve body along the central line, a piston is arranged in the buffer area, a sliding rod is connected with the piston, four groups of through holes are formed in the piston at equal angles, and the buffer area is connected with an oil return area.
Compared with the prior art, the invention has the beneficial effects that:
1. the closed box body consists of a plurality of plate bodies with different sizes, when mechanical equipment generates noise during operation, the noise is absorbed by the sound-absorbing cotton, so that the noise is isolated in the noise reduction device box body, the noise generated during the operation of the mechanical equipment is prevented from being transmitted to the outside, and the noise reduction treatment of the mechanical equipment is realized;
2. the two groups of exhaust fans are in the same wind direction, and run simultaneously through the two groups of exhaust fans, so that air in the closed box body flows at an accelerated speed, mechanical equipment is effectively cooled, sound-absorbing cotton absorbs noise in the vent pipe, the noise is prevented from flowing out when the heat dissipation device ventilates the closed box body, the heat dissipation device is set, the mechanical equipment is cooled, and noise pollution is effectively avoided;
3. when the mechanical equipment is initially started, the mechanical equipment is initially started and runs unstably, the mechanical equipment shakes seriously, so that the mechanical equipment forms stronger impact force on the bearing plate, the bearing plate vertically moves downwards under the matching action of the sliding rod and the vertical bearing, meanwhile, the first compression spring is used for offsetting one part of the impact force under the action of the rebounding force of the first spring, the rest impact force acts on the piston through the sliding rod, the piston vertically moves downwards, one part of hydraulic oil quickly passes through the through hole due to the extrusion force of the hydraulic oil, offsets one part of impact force through the friction force of the through hole and the hydraulic oil, simultaneously, the other part of hydraulic oil enters the oil return area, and offsets the rest impact force through the vacuum force of the oil return area, so that the noise generated by vibration is avoided, when the mechanical equipment runs normally, the bearing plate rebounds under the action of the damping mechanism, and the rebounding, the pressing plate vertically moves upwards under the action of the guide pillar and the vertical bearing, meanwhile, the spring is compressed, and the rebound force of the bearing plate is offset through the rebound force of the spring, so that the mechanical equipment stably operates, the vibration generated by the operation of the mechanical equipment is effectively processed by setting the damping device, and the noise is further reduced.
Drawings
FIG. 1 is a front cross-sectional view of the structure of the present invention;
FIG. 2 is an enlarged view of FIG. 1A;
FIG. 3 is an enlarged view of FIG. 1B;
FIG. 4 is a front view of the present invention;
fig. 5 is a side view of the structural sound absorbing cotton mechanism of the present invention.
In the figure: 1 noise reduction device box body, 2 heat dissipation device, 3 mechanical equipment, 4 damping device, 5 rubber carrying platform, 101 closed box body, 102 plate body, 103 door, 201 sound-absorbing cotton mechanism, 202 exhaust fan, 203 air filter, 204 breather pipe, 401 anti-shaking mechanism, 402 bearing plate, 403 damping plate body, 404 damping mechanism, 405 anti-inertial impact mechanism, 1021 shell, 1022 sound-absorbing cotton, 1023 plugging cover, 2011 fixed sleeve, 2012 sound-absorbing cotton I, 2013 iron wire fixed frame, 4011 guide pillar, 4012 transverse plate, 4013 spring, 4014 pressing plate, 4015 rubber pad, 4041 sliding rod, 4042 spring I, 4043 bearing plate, 4051 oil pressure valve body, 4052 piston, 4053 through hole, 4054 buffer zone, 4055 oil return zone.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 5, the present invention provides a technical solution: a novel industrial noise reduction device comprises a noise reduction device box body 1, heat dissipation devices 2, mechanical equipment 3, a damping device 4 and a rubber carrying platform 5, wherein two groups of heat dissipation devices 2 are symmetrically arranged on two sides of the noise reduction device box body 1, the damping device 4 is arranged in the noise reduction device box body 1, the rubber carrying platform 5 is arranged at the lower end of the damping device 4, the noise reduction device box body 1 comprises a closed box body 101, a plurality of plate bodies 102 are arranged on the closed box body 101, two groups of doors 103 are symmetrically arranged on one side of the closed box body 101, one end of each door 103 is hinged with the closed box body 101 through two groups of hinges, each plate body 102 comprises a shell 1021, sound absorption cotton 1022 is arranged in the shell 1021, a blocking cover 1023 is arranged on the shell 1021, the closed box body 101 is composed of a plurality of plate bodies 102 with different sizes, when the mechanical equipment 3, therefore, noise generated by the operation of the mechanical equipment 3 is prevented from being transmitted to the outside, and the noise reduction treatment of the mechanical equipment 3 is realized;
further, the heat dissipation device 2 comprises a vent pipe 204, a sound-absorbing cotton mechanism 201 is arranged in the vent pipe 204, an exhaust fan 202 is arranged on one side of the sound-absorbing cotton mechanism 201, an air filter 203 is arranged on one side of the exhaust fan 202, the sound-absorbing cotton mechanism 201 comprises a sound-absorbing cotton 2012, an iron wire fixing frame 2013 is arranged on the sound-absorbing cotton 2012, and a fixing sleeve 2011 is sleeved on the iron wire fixing frame 2013, wherein the two groups of exhaust fans 202 have the same wind direction and run simultaneously through the two groups of exhaust fans 202, so that the air in the sealed box body 101 flows at an accelerated speed, the mechanical equipment 3 is effectively cooled, then the sound-absorbing cotton 201 absorbs noise in the vent pipe 204, the noise is prevented from flowing out when the heat dissipation device 2 ventilates the sealed box body 101, the heat dissipation device 2 is set to cool the mechanical equipment 3;
further, the damping device 4 comprises a damping plate body 403, the damping plate body 403 is arranged on the rubber carrier 5, a plurality of inertial impact prevention mechanisms 405 are equidistantly arranged on the damping plate body 403, the inertial impact prevention mechanisms 405 are connected with the damping mechanisms 404, the damping mechanisms 404 are connected with the receiving plate 402, two sets of anti-shaking mechanisms 401 are symmetrically arranged on two sides of the receiving plate 402, mechanical equipment 3 is arranged on the receiving plate 402, each anti-shaking mechanism 4011 comprises a transverse plate 4012, the transverse plate 4012 is connected with the damping plate body 403, a plurality of guide posts 4011 are equidistantly arranged on one side of the transverse plate 4012, a vertical bearing is arranged at one end of each guide post 4011, the vertical bearing is embedded in the transverse plate 4012, the other end of each guide post 4011 penetrates through a spring 4013 and is connected with a pressure plate 4, a rubber pad 4015 is arranged on the pressure plate 4014, the damping mechanisms 404 comprises a sliding rod 4041, one end of the sliding rod 4041 is, the inertia impact preventing mechanism 405 includes an oil pressure valve body 4051, the pressure bearing plate 4043 is connected to the oil pressure valve body 4051, a buffer area 4054 is disposed along a center line in the oil pressure valve body 4051, a piston 4052 is disposed in the buffer area 4054, the sliding rod 4041 is connected to the piston 4052, four sets of through holes 4053 are disposed at equal angles on the piston 4052, the buffer area 4054 is connected to an oil return area 4055, when the mechanical apparatus 3 is initially started, the mechanical apparatus 3 is initially started and is unstable due to operation, the mechanical apparatus 3 shakes more severely, so that the mechanical apparatus 3 forms a stronger receiving plate 402, the receiving plate 402 vertically moves downward under the cooperation of the impact force of the sliding rod 4041 and the vertical bearing, and at the same time, the first spring 4042 is compressed, a part of the impact force is cancelled under the action of the resilient force of the first spring 4042, the remaining impact force acts on the piston 4052 through the sliding rod 4041, the piston 4052 vertically, offset some impact force through the frictional force of through-hole 4053 with hydraulic oil, another part hydraulic oil gets into oil return district 4055 simultaneously, offset remaining impact force through oil return district 4055's vacuum force, thereby avoid the noise that produces because of vibrations, when mechanical equipment 3 operation is normal, accept board 402 and will bounce-back under damper 404's effect, the bounce-back is used in on clamp plate 4014, clamp plate 4014 moves perpendicularly upwards under the effect of guide pillar 4011 and upright bearing, simultaneously compression spring 4013, through spring 4013 bounce-back force, the bounce-back that makes accept board 402 is offset, thereby make mechanical equipment 3 steady operation, the vibrations that damping device 4's settlement made mechanical equipment 3 operation produce are effectively handled, thereby further reduced the production of noise.
The working principle is as follows: in the using process, when the mechanical device 3 is initially started, the mechanical device 3 is initially started and runs unstably, the mechanical device 3 shakes seriously, so that the mechanical device 3 forms stronger impact force on the bearing plate 402, the bearing plate 402 vertically moves downwards under the matching action of the sliding rod 4041 and the upright bearing, meanwhile, the first spring 4042 is compressed, part of the impact force is counteracted by the rebounding force of the first spring 4042, the rest impact force acts on the piston 4052 through the sliding rod 4041, the piston 4052 vertically moves downwards, as the hydraulic oil is subjected to the extrusion force, a part of the hydraulic oil quickly passes through the through hole 4053, a part of the impact force is counteracted through the friction force between the through hole 4053 and the hydraulic oil, meanwhile, the other part of the hydraulic oil enters the oil return area 4055, the rest impact force is counteracted through the vacuum force of the oil return area 4055, when the mechanical device 3 runs normally, the bearing plate 402 rebounds under the action of the, the rebound is acted on the pressure plate 4014, the pressure plate 4014 moves vertically and upwards under the action of the guide post 4011 and the vertical bearing, meanwhile, the spring 4013 is compressed, and the rebound force of the bearing plate 402 is counteracted through the rebound force of the spring 4013, so that the mechanical equipment 3 operates stably.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a new-type industrial equipment of making an uproar that falls, is including making an uproar device box (1), heat abstractor (2), mechanical equipment (3), damping device (4), rubber microscope carrier (5), its characterized in that: two groups of heat dissipation devices (2) are symmetrically arranged on two sides of the noise reduction device box body (1), a damping device (4) is arranged in the noise reduction device box body (1), and a rubber carrying platform (5) is arranged at the lower end of the damping device (4);
the noise reduction device box body (1) comprises a closed box body (101), a plurality of plate bodies (102) are arranged on the closed box body (101), two groups of doors (103) are symmetrically arranged on one side of the closed box body (101), and one end of each door (103) is hinged to the closed box body (101) through two groups of hinges.
2. The new industrial noise reduction device according to claim 1, characterized in that: heat abstractor (2) are including breather pipe (204), set up in breather pipe (204) and inhale cotton mechanism of sound (201), inhale cotton mechanism of sound (201) one side and set up exhaust fan (202), exhaust fan (202) one side sets up air cleaner (203).
3. The new industrial noise reduction device according to claim 1, characterized in that: the damping device (4) comprises a damping plate body (403), the damping plate body (403) is arranged on the rubber carrying platform (5), a plurality of inertial impact preventing mechanisms (405) are arranged on the damping plate body (403) at equal intervals, the inertial impact preventing mechanisms (405) are connected with the damping mechanism (404), the damping mechanism (404) is connected with the bearing plate (402), two groups of anti-shaking mechanisms (401) are symmetrically arranged on two sides of the bearing plate (402), and mechanical equipment (3) is arranged on the bearing plate (402).
4. The new industrial noise reduction device according to claim 1, characterized in that: the plate body (102) comprises a shell (1021), sound-absorbing cotton (1022) is arranged in the shell (1021), and a blocking cover (1023) is arranged on the shell (1021).
5. The new industrial noise reduction device according to claim 2, characterized in that: inhale cotton mechanism of sound (201) including inhaling cotton (2012), inhale and set up iron wire mount (2013) on cotton (2012), fixed cover (2011) is established to the cover on iron wire mount (2013).
6. A new industrial noise reduction device according to claim 3, characterized in that: anti-shake mechanism (4011) includes diaphragm (4012), the shock attenuation plate body (403) is connected to diaphragm (4012), and diaphragm (4012) one side equidistance sets up a plurality of guide pillars (4011), guide pillar (4011) one end sets up upright bearing, upright bearing embedding diaphragm (4012), the guide pillar (4011) other end passes spring (4013) and is connected with clamp plate (4014), set up rubber pad (4015) on clamp plate (4014).
7. A new industrial noise reduction device according to claim 3, characterized in that: the shock absorption mechanism (404) comprises a sliding rod (4041), one end of the sliding rod (4041) is connected with the bearing plate (402), the other end of the sliding rod (4041) penetrates through a first spring (4042) to be provided with an upright bearing, and the upright bearing is embedded into the bearing plate (4043).
8. A new industrial noise reduction device according to claim 3, characterized in that: prevent inertial impact mechanism (405) including oil pressure valve body (4051), oil pressure valve body (4051) is connected to pressure-bearing plate (4043), set up buffer (4054) along the central line in oil pressure valve body (4051), set up piston (4052) in buffer (4054), piston (4052) is connected in slide bar (4041), the equidistance sets up four groups through-hole (4053) on piston (4052), oil return district (4055) is connected in buffer (4054).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110146735.5A CN112885322A (en) | 2021-02-03 | 2021-02-03 | Novel industrial noise reduction equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110146735.5A CN112885322A (en) | 2021-02-03 | 2021-02-03 | Novel industrial noise reduction equipment |
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| Publication Number | Publication Date |
|---|---|
| CN112885322A true CN112885322A (en) | 2021-06-01 |
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ID=76056816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110146735.5A Pending CN112885322A (en) | 2021-02-03 | 2021-02-03 | Novel industrial noise reduction equipment |
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| CN (1) | CN112885322A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206257019U (en) * | 2016-12-15 | 2017-06-16 | 惠安创达装饰设计有限公司 | A kind of noise reduction damping casing of piston type air compressor |
| CN109887728A (en) * | 2019-04-09 | 2019-06-14 | 中科电力装备集团变压器有限公司 | A kind of denoising structure for dry-type transformer |
| CN209025815U (en) * | 2018-11-16 | 2019-06-25 | 王瑾 | A kind of air compressor machine noise-reducing structure in thermal power plant |
| CN210399464U (en) * | 2019-09-23 | 2020-04-24 | 崔浩 | Noise reduction device for central air-conditioning fan coil |
| CN211116826U (en) * | 2019-09-24 | 2020-07-28 | 天津固德风通风设备有限公司 | Fan with vibration/noise reduction function |
| CN212303056U (en) * | 2020-05-19 | 2021-01-05 | 上海奕鲲电子科技有限公司 | Noise reduction device for mechanical equipment |
| CN212360633U (en) * | 2020-06-08 | 2021-01-15 | 新疆希望电子有限公司 | Air source heat pump vibration/noise reduction device |
-
2021
- 2021-02-03 CN CN202110146735.5A patent/CN112885322A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206257019U (en) * | 2016-12-15 | 2017-06-16 | 惠安创达装饰设计有限公司 | A kind of noise reduction damping casing of piston type air compressor |
| CN209025815U (en) * | 2018-11-16 | 2019-06-25 | 王瑾 | A kind of air compressor machine noise-reducing structure in thermal power plant |
| CN109887728A (en) * | 2019-04-09 | 2019-06-14 | 中科电力装备集团变压器有限公司 | A kind of denoising structure for dry-type transformer |
| CN210399464U (en) * | 2019-09-23 | 2020-04-24 | 崔浩 | Noise reduction device for central air-conditioning fan coil |
| CN211116826U (en) * | 2019-09-24 | 2020-07-28 | 天津固德风通风设备有限公司 | Fan with vibration/noise reduction function |
| CN212303056U (en) * | 2020-05-19 | 2021-01-05 | 上海奕鲲电子科技有限公司 | Noise reduction device for mechanical equipment |
| CN212360633U (en) * | 2020-06-08 | 2021-01-15 | 新疆希望电子有限公司 | Air source heat pump vibration/noise reduction device |
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Application publication date: 20210601 |