CN117847000A - Fan operation noise detection device - Google Patents
Fan operation noise detection device Download PDFInfo
- Publication number
- CN117847000A CN117847000A CN202410261346.0A CN202410261346A CN117847000A CN 117847000 A CN117847000 A CN 117847000A CN 202410261346 A CN202410261346 A CN 202410261346A CN 117847000 A CN117847000 A CN 117847000A
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- Prior art keywords
- fan
- sound insulation
- sliding
- noise
- wind resistance
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- 238000001514 detection method Methods 0.000 title claims abstract description 48
- 238000009413 insulation Methods 0.000 claims abstract description 59
- 238000004804 winding Methods 0.000 claims description 35
- 239000004744 fabric Substances 0.000 claims description 25
- 238000007789 sealing Methods 0.000 claims description 2
- 239000006260 foam Substances 0.000 claims 1
- 239000011148 porous material Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 12
- 238000009434 installation Methods 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 238000002955 isolation Methods 0.000 abstract description 3
- 239000000758 substrate Substances 0.000 abstract 1
- 239000000428 dust Substances 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 239000002937 thermal insulation foam Substances 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention discloses a fan operation noise detection device, which relates to the technical field of noise detection and comprises a sound insulation channel, a noise tester, a wind resistance adjusting component and a fan positioning component; one side of sound insulation passageway is provided with the opening, and the opening part is provided with the door body, be formed with the detection zone in the sound insulation passageway of opening part, the installation mouth has been seted up at the sound insulation passageway top of detection zone top, the installation mouth department is installed noise tester through connecting substrate, and noise tester's detection portion is located the sound insulation passageway. According to the invention, during detection, a detector can stand at one side of the door body to check the value of noise through the display part of the noise tester, the sound isolation channel can isolate the transmission of the noise of the fan in the detection process, so that discomfort caused by the noise to the detector is avoided, and in the detection process, the detector can adjust the resistance of the air inlet of the fan through the wind resistance adjusting assembly so as to detect the noise condition of the fan in different wind resistance states.
Description
Technical Field
The invention relates to the technical field of noise detection, in particular to a fan operation noise detection device.
Background
In order to achieve labor protection and environmental protection, the influence range and degree of fan noise on the environment are effectively controlled; the low-noise fan is developed to reach the corresponding allowable standard, so that after the industrial fan is produced, the noise of the industrial fan needs to be detected, and the industrial fan reaches the noise standard.
The fan of current part detects through artifical handheld noise detector when detecting the noise mostly, and such detection mode needs the workman to stand and listen the noise that industry fan produced all the time beside the fan, and causes harm to workman's health for a long time easily, and in the in-service use, the air inlet department of fan can install the filter screen generally, and after its long-time use, because be stained with the dust on the filter screen, the fresh air resistance of fan increases this moment, under this state, probably can lead to the noise aggravation that the pipeline fan produced, can't detect the noise condition under this state among the prior art.
Disclosure of Invention
The invention aims to provide a fan operation noise detection device for solving the problems in the background technology.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
the invention provides a fan running noise detection device which comprises a sound insulation channel, a noise tester, a wind resistance adjusting component and a fan positioning component, wherein the sound insulation channel is arranged on the wind resistance adjusting component; one side of sound insulation passageway is provided with the opening, and the opening part is provided with the door body, be formed with the detection zone in the sound insulation passageway of opening part, the installing port has been seted up at the sound insulation passageway top of detection zone top, the installing port department is installed the noise tester through connecting the base plate, and the detection portion of noise tester is located the sound insulation passageway, and the display part of sound insulation passageway is located the sound insulation passageway top, still slide in the detection zone and be provided with the sliding seat, sliding seat and sound insulation passageway sliding fit and can follow the opening roll-off sound insulation passageway with the mode of sideslipping and slide into in the sound insulation passageway, wind resistance adjusting part and fan locating component are installed respectively at the both ends of sliding seat, wind resistance adjusting part can be connected with the fan air intake and adjust the resistance of fan inlet, fan locating part is used for fixing a position the fan.
Further, the inner wall of the sound insulation channel is provided with sound insulation foam.
Further, wind resistance adjusting part includes the dryer that sets up with the fan adaptation and along sound insulation passageway axial direction, the both ends of dryer are air inlet end and induced draft end respectively, the air inlet end of dryer is provided with the wind resistance structure, the wind resistance structure is including the first reel and the second reel of symmetry setting in dryer both sides to and wind resistance cloth, all be provided with the rolling part in first reel and the second reel, wind resistance cloth be connected with the rolling part in first reel and the second reel respectively, and wind resistance cloth's one side is hugged closely in and is covered the air inlet end of dryer, the end that induced drafts of dryer is inlayed and is equipped with sealed the pad, wind resistance cloth is formed by the gauze interconnect of a plurality of strips and aperture increase gradually.
Further, the air inlet end of the air duct is provided with an arc-shaped panel, the inner cambered surface of the arc-shaped panel faces the air duct, the first winding drum and the second winding drum are respectively arranged at two ends of the arc-shaped panel, the winding parts comprise rotating shafts and stepping motors, the rotating shafts of the two winding parts are respectively coaxially arranged with the corresponding first winding drum and second winding drum, and the outer cambered surface of the arc-shaped panel forms a sliding surface at the air inlet end of the air duct.
Further, fan locating component includes two sliding support seats to and drive assembly, two sliding support seats with sliding support seat sliding fit and can follow the slip seat top bidirectional slip of sound insulation passageway axial direction, drive assembly is used for the drive two sliding support seats slide in opposite directions or in opposite directions, the top of sliding support seat is provided with the arc recess with fan outer wall adaptation, and evenly inlays in the arc recess is equipped with the ball, two sliding support seats have locking position when sliding support seat is in locking position, the distance is furthest between two sliding support seats, and the air intake of fan is contradicted just at the end of induced drafting of dryer.
Further, the top of sliding seat has seted up the strip spout along the axial direction of sound insulation passageway, the bottom of sliding support seat is provided with the slider that slides and set up in the strip spout, drive assembly is including setting up the drive shaft in the strip spout, be provided with the first screw thread and the second screw thread of screw thread opposite and with two slider screw thread complex respectively on the drive shaft, the one end of drive shaft extends to the one end of sliding seat and is provided with the actuating source.
Further, the driving source comprises a first gear fixed at one end of the driving shaft and a rotating rod arranged at one side of the sliding seat close to the sound insulation channel, a second gear and a third gear are respectively arranged on the rotating rod, a chain is connected between the second gear and the first gear, and a rack meshed with the third gear is arranged at the bottom of the sound insulation channel below the third gear.
Compared with the prior art, the above technical scheme has the following beneficial effects:
according to the invention, during detection, a detector can stand at one side of the door body to check the value of noise through the display part of the noise tester, the sound isolation channel can isolate the transmission of the noise of the fan in the detection process, so that discomfort caused by the noise to the detector is avoided, and in the detection process, the detector can adjust the resistance of the air inlet of the fan through the wind resistance adjusting assembly so as to detect the noise condition of the fan in different wind resistance states.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a schematic view of a first view angle structure of the present invention;
FIG. 2 is a schematic view of a second view angle structure of the present invention;
FIG. 3 is a schematic top view of the present invention;
FIG. 4 is a schematic view of the A-A structure of FIG. 3;
FIG. 5 is a schematic view of the B-B directional structure of FIG. 3;
FIG. 6 is a right side schematic view of the present invention;
FIG. 7 is a schematic view of the partial structure at A of FIG. 6;
FIG. 8 is a schematic view of the wind-resistive cloth of the present invention.
In the figure:
100. a sound insulation channel; 110. an opening; 120. a door body; 130. a detection region; 140. a sliding seat;
200. a noise tester;
300. a windage adjustment assembly; 310. an air duct; 320. a windage structure; 321. a first reel; 322. a second reel; 323. wind resistance cloth; 324. an arc-shaped panel;
400. a fan positioning assembly; 410. a sliding support seat; 420. an arc-shaped groove; 430. a slide block; 440. a drive shaft; 441. a first thread; 442. a second thread; 450. a driving source; 451. a driving source; 452. a rotating lever; 453. a second gear; 454. a third gear; 456. a chain; 457. a rack; 460. a strip-shaped chute;
510. a cylindrical housing; 520. and (5) extending the edge.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.
Referring to fig. 1 to 8, the present invention provides a fan operation noise detection device, which includes a sound insulation channel 100, a noise tester 200, a wind resistance adjustment assembly 300, and a fan positioning assembly 400; the sound insulation passageway 100 is provided with the opening 110 in one side, and the opening 110 department is provided with the door body 120, be formed with detection zone 130 in the sound insulation passageway 100 of opening 110 department, the installation mouth has been seted up at the sound insulation passageway 100 top of detection zone 130 top, the installation mouth department is installed noise tester 200 through the connection base plate, and the detection portion of noise tester 200 is located the sound insulation passageway 100, and the display position of sound insulation passageway 100 is located the sound insulation passageway 100 top, still slide and be provided with sliding seat 140 in the detection zone 130, sliding seat 140 and sound insulation passageway 100 sliding fit and can follow opening 110 and slide out of the sound insulation passageway 100 and slide into the sound insulation passageway 100 with the mode of sideslipping in, wind resistance adjustment subassembly 300 and fan positioning subassembly 400 are installed respectively at the both ends of sliding seat 140, wind resistance adjustment subassembly 300 can be connected with the fan air intake and adjust the resistance of fan inlet, fan positioning subassembly 400 is used for fixing a position the fan.
Before detection, the door body 120 is opened to slide the sliding seat 140 out of the sound insulation channel 100, a fan to be detected is placed on the sliding seat 140 and is fixed by the fan positioning assembly 400, then the wind resistance adjusting assembly 300 is connected with a fan air inlet, the sliding seat 140 is pushed into the sound insulation channel 100, the door body 120 is closed, and the work before fan detection is completed; during detection, a detector can stand on one side of the door body 120 to check the numerical value of noise through the display part of the noise tester 200, the sound isolation channel 100 can isolate the transmission of fan noise in the detection process, discomfort caused by noise to the detector is avoided, and in the detection process, the resistance of the air inlet of the fan is regulated by the detector through the wind resistance regulating assembly 300, so that the noise condition of the fan in different wind resistance states is detected.
In this embodiment, the inner wall of the sound insulation channel 100 is provided with sound insulation foam. Noise that the sound insulation foam can effectively absorb the fan and produce avoids the noise to propagate to the external world, avoids causing staff's discomfort.
In this embodiment, the fan is a duct fan in conventional technology, and includes a cylindrical housing 510, and a fan assembly (not shown) disposed in the cylindrical housing 510, wherein both ends of the cylindrical housing 510 are provided with an extension edge 520 for mounting. For the pipeline fan, the pipeline fan is generally connected with an air exchanging pipeline to be used for ventilating indoor places, in the actual use process, a filter screen is usually arranged at an air inlet of the pipeline fan so as to avoid introducing external dust into a room, and after the pipeline fan is used for a long time, the air inlet resistance of the pipeline fan is increased due to the fact that dust is adhered to the filter screen, and in this state, noise generated by the pipeline fan is possibly increased.
In order to detect the noise generated by the fan under the above circumstances, in this embodiment, the wind resistance adjusting component 300 includes an air drum 310 that is adapted to the fan and is disposed along the axial direction of the sound insulation channel 100, two ends of the air drum 310 are an air inlet end and an air suction end, the air inlet end of the air drum 310 is provided with a wind resistance structure 320, the wind resistance structure 320 includes a first winding drum 321 and a second winding drum 322 that are symmetrically disposed on two sides of the air drum 310, and wind resistance cloth 323, winding members are disposed in the first winding drum 321 and the second winding drum 322, the wind resistance cloth 323 is connected with the winding members in the first winding drum 321 and the second winding drum 322, one side of the wind resistance cloth 323 is clung to and covers the air inlet end of the air drum 310, the air suction end of the air drum 310 is embedded with a sealing pad, and the wind resistance cloth 323 is formed by interconnecting a plurality of strips and gauze with gradually increased aperture.
Based on the design, after the fan is started, the fan generates air suction to enable air to enter the fan through the wind-proof cloth 323 through the wind barrel 310, in the process, the winding parts in the first winding drum 321 and the second winding drum 322 are started, the winding parts in the first winding drum 321 release the wind-proof cloth 323, the winding parts in the second winding drum 322 wind the wind-proof cloth 323, and then the wind-proof cloth 323 moves at the air inlet end of the wind barrel 310, as the wind-proof cloth 323 is formed by connecting a plurality of pieces of strip-shaped gauze with gradually reduced apertures, in the moving process of the wind-proof cloth 323, the aperture of the wind-proof cloth 323 at the air suction end of the wind barrel 310 is continuously reduced, so that the resistance of the air passing through the wind-proof cloth 323 is continuously increased, the state that the dust of the filter screen at the air inlet end of the fan is continuously increased in normal use can be simulated, and the noise of the fan in the state is detected.
Further, in order to make windage 323 paste in the air inlet end of dryer 310 all the time in the removal in-process, the air inlet end department of dryer 310 is provided with arcuation panel 324, arcuation panel 324's intrados is towards dryer 310, and first reel 321 and second reel 322 set up respectively at the both ends of arcuation panel 324, the rolling part includes the axis of rotation to and step motor, the axis of rotation of two rolling parts respectively with corresponding first reel 321, the coaxial setting of second reel 322, arcuation panel 324's extrados forms the sliding surface at dryer 310's air inlet end. Based on the above design, in the moving process of the wind-resistant cloth 323, the wind-resistant cloth 323 can be always attached to the sliding surface of the arc panel 324, so as to prevent air from entering the wind barrel 310 from two sides of the wind-resistant cloth 323.
In order to prevent the fan from vibrating during operation, in this embodiment, the fan positioning assembly 400 includes two sliding support seats 410, and a driving assembly, where the two sliding support seats 410 are slidably engaged with the sliding seat 140 and can slide bi-directionally along the axial direction of the sound insulation channel 100 at the top of the sliding seat 140, the driving assembly is used to drive the two sliding support seats 410 to slide in opposite directions or opposite directions, an arc groove 420 adapted to the outer wall of the fan is provided at the top of the sliding support seat 410, balls are uniformly embedded in the arc groove 420, the two sliding support seats 410 have locking positions, when the sliding support seats 410 are in the locking positions, the distance between the two sliding support seats 410 is the farthest, and the air inlet of the fan is just abutted against the air suction end of the air duct 310.
Based on the above design, when the fan is placed, the two sliding support seats 410 are closest to each other, and then the detection personnel only need to place the fan to be detected in the grooves of the two sliding support seats 410, and start the driving assembly to enable the two sliding support seats 410 to move in opposite directions until the two sliding support seats 410 move to lock positions, so that the fan can be positioned. Specifically, after the two sliding support bases 410 move back to the locking position, the two sliding support bases 410 respectively collide with the outer extending edge 520 of the fan to position the fan, and in the process that the two sliding support bases 410 move back to back, the sliding support base 410 close to the air duct can also enable the fan to move towards one end of the air duct 310 and cooperate with the air inlet end of the air duct 310 through the outer extending edge 520 of the fan, so that connection between the fan and the air duct 310 is completed.
Specifically, the top of the sliding seat 140 is provided with a strip-shaped chute 460 along the axial direction of the sound insulation channel 100, the bottom of the sliding support seat 410 is provided with a sliding block 430 slidably disposed in the strip-shaped chute 460, the driving assembly includes a driving shaft 440 disposed in the strip-shaped chute 460, the driving shaft 440 is respectively provided with a first thread 441 and a second thread 442 with opposite threads and in threaded engagement with the two sliding blocks 430, and one end of the driving shaft 440 extends to one end of the sliding seat 140 to be provided with a driving source 450. Based on the above design, when the driving source 450 drives the driving shaft 440 to rotate in the forward and reverse directions, the driving shaft 440 can be engaged with the threads of the two sliding blocks 430 through the first threads 441 and the second threads 442, so as to complete the sliding motion of the two sliding supporting seats 410.
Further, the driving source 450 includes a first gear 451 fixed at one end of the driving shaft 440, and a rotating rod 452 disposed on one side of the sliding seat 140 near the sound insulation channel 100, wherein a second gear 453 and a third gear 454 are respectively disposed on the rotating rod 452, a chain 456 is connected between the second gear 453 and the first gear 451, and a rack 457 meshed with the third gear 454 is disposed at the bottom of the sound insulation channel 100 below the third gear 454.
Based on the above design, after the detection personnel place the fan in the recess of two sliding support seats 410, only need with sliding seat 140 to the interior promotion of sound insulation passageway 100 alright accomplish the location of fan to and the fan is connected with dryer 310, and after the detection is accomplished, only need with sliding seat 140 pull out in the sound insulation passageway 100 just can remove the location to the fan, make things convenient for the detection personnel to take out the fan.
Specifically, when the sliding seat 140 moves towards the sound insulation channel 100, the third gear 454 is meshed with the rack 457, so that the rotating rod 452 rotates along with the rotating rod and drives the second gear 453 to rotate, the second gear 453 rotates to enable the driving shaft 440 to rotate through the chain 456, so that the two sliding seat bases move back to back, after the sliding seat 140 completely slides into the sound insulation channel 100, the two sliding seat bases move back to the locking position, positioning of the fan and connection of the fan and the air duct 310 are completed, and similarly, when the sliding seat 140 moves out of the sound insulation channel 100, the driving shaft 440 rotates reversely, and the two sliding seat bases move back to each other to release the locking of the fan.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (7)
1. The fan operation noise detection device is characterized by comprising a sound insulation channel, a noise tester, a wind resistance adjusting component and a fan positioning component; one side of sound insulation passageway is provided with the opening, and the opening part is provided with the door body, be formed with the detection zone in the sound insulation passageway of opening part, the installing port has been seted up at the sound insulation passageway top of detection zone top, the installing port department is installed the noise tester through connecting the base plate, and the detection portion of noise tester is located the sound insulation passageway, and the display part of sound insulation passageway is located the sound insulation passageway top, still slide in the detection zone and be provided with the sliding seat, sliding seat and sound insulation passageway sliding fit and can follow the opening roll-off sound insulation passageway with the mode of sideslipping and slide into in the sound insulation passageway, wind resistance adjusting part and fan locating component are installed respectively at the both ends of sliding seat, wind resistance adjusting part can be connected with the fan air intake and adjust the resistance of fan inlet, fan locating part is used for fixing a position the fan.
2. The fan operation noise detection device according to claim 1, wherein an inner wall of the soundproof passage is provided with soundproof foam.
3. The fan operation noise detection device according to claim 1, wherein the wind resistance adjusting component comprises a wind barrel which is matched with the fan and is arranged along the axial direction of the sound insulation channel, two ends of the wind barrel are an air inlet end and an air suction end respectively, the air inlet end of the wind barrel is provided with a wind resistance structure, the wind resistance structure comprises a first winding drum and a second winding drum which are symmetrically arranged on two sides of the wind barrel, and wind resistance cloth, winding parts are arranged in the first winding drum and the second winding drum respectively, the wind resistance cloth is connected with the winding parts in the first winding drum and the second winding drum respectively, one side of the wind resistance cloth is clung to and covers the air inlet end of the wind barrel, the air suction end of the wind barrel is embedded with a sealing pad, and the wind resistance cloth is formed by interconnecting a plurality of pieces of strips of gauze with gradually increased pore diameters.
4. The fan running noise detection device according to claim 3, wherein an arc-shaped panel is arranged at the air inlet end of the air duct, an inner arc surface of the arc-shaped panel faces the air duct, the first winding drum and the second winding drum are respectively arranged at two ends of the arc-shaped panel, the winding parts comprise rotating shafts, and the rotating shafts of the two winding parts are respectively coaxially arranged with the corresponding first winding drum and second winding drum, and an outer arc surface of the arc-shaped panel forms a sliding surface at the air inlet end of the air duct.
5. The fan running noise detection device according to claim 1, wherein the fan positioning assembly comprises two sliding supporting seats and a driving assembly, the two sliding supporting seats are slidably matched with the sliding seats and can slide in the two directions at the tops of the sliding seats along the axial direction of the sound insulation channel, the driving assembly is used for driving the two sliding supporting seats to slide in opposite directions or opposite directions, arc-shaped grooves matched with the outer wall of the fan are formed in the tops of the sliding supporting seats, balls are uniformly embedded in the arc-shaped grooves, the two sliding supporting seats are provided with locking positions, when the sliding supporting seats are in the locking positions, the distance between the two sliding supporting seats is the farthest, and the air inlet of the fan is just abutted against the air suction end of the air cylinder.
6. The fan running noise detection device according to claim 5, wherein the top of the sliding seat is provided with a strip-shaped sliding groove along the axial direction of the sound insulation channel, the bottom of the sliding support seat is provided with a sliding block arranged in the strip-shaped sliding groove in a sliding manner, the driving assembly comprises a driving shaft arranged in the strip-shaped sliding groove, the driving shaft is respectively provided with a first thread and a second thread which are opposite in thread and are matched with the two sliding blocks in a threaded manner, and one end of the driving shaft extends to one end of the sliding seat to be provided with a driving source.
7. The fan running noise detection apparatus according to claim 6, wherein the driving source includes a first gear fixed at one end of the driving shaft, and a rotating lever provided at a side of the sliding seat close to the soundproof passage, a second gear and a third gear are provided on the rotating lever, respectively, a chain is connected between the second gear and the first gear, and a rack engaged with the third gear is provided at a bottom of the soundproof passage under the third gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410261346.0A CN117847000B (en) | 2024-03-07 | 2024-03-07 | Fan operation noise detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410261346.0A CN117847000B (en) | 2024-03-07 | 2024-03-07 | Fan operation noise detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117847000A true CN117847000A (en) | 2024-04-09 |
| CN117847000B CN117847000B (en) | 2024-06-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410261346.0A Active CN117847000B (en) | 2024-03-07 | 2024-03-07 | Fan operation noise detection device |
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| CN (1) | CN117847000B (en) |
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