CN213116881U - Noise reduction device for air inlet of fan - Google Patents
Noise reduction device for air inlet of fan Download PDFInfo
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- CN213116881U CN213116881U CN202022147256.9U CN202022147256U CN213116881U CN 213116881 U CN213116881 U CN 213116881U CN 202022147256 U CN202022147256 U CN 202022147256U CN 213116881 U CN213116881 U CN 213116881U
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Abstract
The application relates to a device of making an uproar falls in fan air intake uses in centrifugal fan's field, and it includes the escutcheon, the week side of escutcheon forms the air inlet district, the one end of escutcheon forms the exhaust zone, the one end that the exhaust zone was kept away from to the escutcheon is provided with the cover plate, be provided with the amortization layer in the region that cover plate and escutcheon formed, be provided with coupling mechanism on the escutcheon. This application has the effect that improves centrifugal fan and fall the performance of making an uproar.
Description
Technical Field
The application relates to the field of centrifugal fans, in particular to a noise reduction device for a fan air inlet.
Background
The centrifugal fan utilizes an impeller (centrifugal force) rotating at a high speed to apply work to a gas medium, and the gas medium is converted from kinetic energy to potential energy (pressure energy) by changing the flow direction and the flow speed of the gas medium. The centrifugal fan has wide application fields, such as building engineering, boilers, chemical industry, petroleum industry, environmental protection industry and the like, and has considerable application prospect.
In the working process of the centrifugal fan, the air inlet of the centrifugal fan generates large noise due to the fact that the flow direction and the flow speed of a gas medium are forcibly changed, the noise reduction effect of the centrifugal fan used at present is poor, and serious noise pollution is caused when the centrifugal fan operates.
SUMMERY OF THE UTILITY MODEL
In order to improve the poor problem of centrifugal fan noise reduction effect, this application provides a device of making an uproar falls of fan air intake.
The application provides a device of making an uproar falls in fan air intake adopts following technical scheme:
the utility model provides a fan air intake fall device of making an uproar, includes the escutcheon, the week side of escutcheon forms the air inlet district, the one end of escutcheon forms the exhaust zone, the one end that the exhaust zone was kept away from to the escutcheon is provided with the cover plate, be provided with the amortization layer in the region that cover plate and escutcheon formed, be provided with coupling mechanism on the escutcheon.
By adopting the technical scheme, the air outlet area of the hole cover is inserted into the air inlet of the fan in a manner of aligning the air outlet area of the hole cover, and a space is reserved between the cover plate and the edge of the air inlet of the fan, so that the air inlet area on the peripheral side of the hole cover can be exposed, and then the hole cover and the edge of the air inlet of the fan are fixed through the connecting mechanism, so that the hole cover can be stably fixed at the air inlet of the fan; because the week side of escutcheon forms the air inlet district to the air inlet mode of fan has been changed, become radial air inlet with the original axial air inlet of fan, make the fan at the operation in-process, in the air inlet district forces the inlet vent cover with external air, then through the amortization layer, finally in the air inlet of fan is sent into from the air outlet district, at this in-process, the amortization layer can play fine noise reduction to the air current, in order to improve the noise reduction of fan effect, reduce the noise pollution that produces during the fan operation.
Optionally, coupling mechanism includes a plurality of connecting rods, and is a plurality of the connecting rod sets up along the week side interval of cover plate, the connecting rod is established to first screw rod towards the one end of cover plate, the one end that the cover plate was kept away from to the connecting rod is established to the second screw rod, set up a plurality of connecting holes corresponding with the position of connecting rod along the periphery on the cover plate, the one end that the exhaust zone was kept away from to the cell casing is seted up a plurality of through-holes corresponding with the connecting hole along the periphery, corresponding through-hole and connecting hole are worn to establish simultaneously to first screw rod, the equal threaded connection in both ends of first screw rod has the nut, one of them the nut supports tightly on the top surface of cover plate, another the.
Through adopting above-mentioned technical scheme, when the air intake department of fan is installed with the escutcheon to needs, the operator at first fixes a plurality of connecting rods in proper order along the air intake periphery of fan, the fixed mode of connecting rod does, with second screw rod threaded connection on the border of fan air intake, alright fix the connecting rod, then equal threaded connection nut on a plurality of first screws, the operator inserts into the air intake that the fan was aimed at to the exhaust area of escutcheon after that, and make first screw rod aim at corresponding through-hole and connecting hole and insert into, then equal threaded connection another nut on a plurality of first screws, the operator screws two nuts on every first screw rod in proper order this moment, make a nut support tightly on the top surface of cover plate, another nut supports tightly on the bottom surface of escutcheon, thereby realize the stable fixed to the escutcheon.
Optionally, when one of the nuts abuts against the top surface of the cover plate and the other nut abuts against the bottom surface of the hole cover, the distance between the two nuts is smaller than the length of the first screw rod.
Through adopting above-mentioned technical scheme, set for being greater than the interval between two nuts under the state of supporting tightly with the length of first screw for the operator can adjust the interval between the air intake border of cover plate and fan, thereby adjusts suitable intake, so that the noise reduction effect reaches the best.
Optionally, a diversion cover is covered outside one end of the hole cover located at the air outlet area, a diversion area is formed between the diversion cover and the hole cover, and a connecting assembly is arranged on the diversion cover.
Through adopting above-mentioned technical scheme, before the installation escutcheon, the operator need install the kuppe earlier, the operator inserts into with the air intake that the kuppe aimed at the fan, then fix the air intake border of kuppe and fan through coupling assembling, thereby can fix the air intake department at the fan with the kuppe steadily, treat the kuppe installation completion back, the operator installs the escutcheon again, make keep the interval between escutcheon and the kuppe and form the diversion district, thereby play the effect to the air current guide, make the better quilt of air current send into in the escutcheon, in order to improve the noise reduction of fan.
Optionally, the coupling assembling includes a plurality of screws, and is a plurality of the screw sets up along the periphery interval of kuppe towards connecting rod one end, the kuppe is provided with the connection piece along the periphery towards the one end of connecting rod, set up a plurality of fixed orificess corresponding with the position of screw along the periphery on the connection piece, the screw is worn to establish corresponding fixed orifices.
Through adopting above-mentioned technical scheme, when the air intake department at the fan is installed with the kuppe to needs, the operator at first inserts into with the air intake that the kuppe aimed at the fan to make the connection piece take and put on the air intake border of fan, then inject a plurality of screws in proper order in the fixed orifices that corresponds, and screw, make screw threaded connection on the border of fan air intake, thereby realize the stable fixed to the kuppe.
Optionally, the second screw rod penetrates through the connecting piece, a part between the connecting rod and the second screw rod is set as a supporting rod, the diameter of the supporting rod is larger than that of the second screw rod, a gasket is sleeved between the supporting rod and the connecting piece on the second screw rod, the inner diameter of the gasket is smaller than that of the supporting rod, and the gasket is clamped between the supporting rod and the connecting piece.
Through adopting above-mentioned technical scheme, during the fixed connection pole, wear to establish the connection piece with the second screw rod after, again with the border threaded connection of fan air intake for the tight pole supports the gasket tightly on the connection piece, thereby plays the effect fixed to the connection piece, fixes the kuppe with stabilizing.
Optionally, one end of the hole cover located in the air outlet area is provided with a hole cylinder, the inside of the hole cylinder is communicated with the inside of the hole cover, and the sound attenuation layer is filled into the hole cylinder.
Through adopting above-mentioned technical scheme, the exhaust area that makes the escutcheon of the hole section of thick bamboo that sets up further extends towards the air intake of fan to improve the noise reduction to fan air intake department.
Optionally, the connecting mechanism includes a plurality of guide plates, a plurality of the guide plates are arranged along the periphery of the diversion area at intervals, one side of each guide plate is arranged on the diversion cover, and the other side of each guide plate is arranged on the hole cover.
By adopting the technical scheme, the air guide sleeve is fixed at the air inlet of the fan through screws, the plurality of air guide plates are arranged between the air guide sleeve and the hole cover, the hole cover can be stably supported and fixed, and the plurality of air guide plates can also play a role in guiding air flow, so that the air flow is better fed into the hole cover, and the noise reduction effect of the fan is improved; in addition, the hole cover is supported and fixed through the guide plate, and the hole cover and the air guide cover can be fixed into a whole, so that the hole cover is convenient to assemble and disassemble, an operator can assemble and disassemble together with the hole cover only by assembling and disassembling the air guide cover, and the convenience of operation is improved.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the peripheral side of the hole cover forms an air inlet area, so that the air inlet mode of the fan is changed, the original axial air inlet of the fan is changed into radial air inlet, the fan forcibly feeds the outside air into the hole cover from the air inlet area in the running process, and then the noise of the air flow is reduced through the noise reduction layer, so that the noise reduction effect of the fan is improved, and the noise pollution generated when the fan runs is reduced;
2. a diversion area is formed by keeping a distance between the hole cover and the diversion cover, which can play a role of guiding airflow, so that the airflow is better sent into the hole cover, and the noise reduction effect of the fan is improved;
3. the hole barrel that sets up makes the exhaust area of hole cover further extend towards the air intake of fan in to improve the noise reduction effect to fan air intake department.
Drawings
Fig. 1 is a schematic overall structure diagram of the first embodiment.
Fig. 2 is an exploded view of a structure embodying the embodiment before the pod and escutcheon are installed.
FIG. 3 is a schematic structural diagram of an embodiment of a shroud and a pod.
Fig. 4 is a schematic view of the overall structure of the second embodiment.
Fig. 5 is a schematic structural diagram of a baffle for embodying the second embodiment.
Reference numerals: 11. an escutcheon; 12. an orifice plate; 121. a through hole; 13. a bore cylinder; 14. a cover plate; 141. connecting holes; 15. a sound-deadening layer; 16. a pod; 17. a connecting rod; 171. a first screw; 172. a second screw; 173. a tightening rod; 18. a nut; 19. a flow guide area; 20. a screw; 21. connecting sheets; 211. a fixing hole; 22. a gasket; 23. a baffle; 24. a fan.
Detailed Description
The present application is described in further detail below with reference to figures 1-5.
The embodiment of the application discloses device of making an uproar falls in fan air intake.
Example 1
Referring to fig. 1 and 2, the noise reduction device for the fan air inlet includes a dome 16, the dome 16 is a conical structure, and both ends of the dome 16 are open, when the dome 16 is installed, an operator inserts the end of the dome 16 with a small opening into the air inlet of the fan 24, and fixes the end of the dome 16 with a large opening and the edge of the air inlet of the fan 24 through a connection assembly, in this embodiment, the fan 24 is a centrifugal fan.
Referring to fig. 1 and 2, the connection assembly includes a plurality of screws 20, the number of the screws 20 may be six, a connection piece 21 is fixedly connected to a periphery of one end of the air guide sleeve 16 with a large opening, the connection piece 21 extends toward one side away from the inside of the air guide sleeve 16, six fixing holes 211 are uniformly formed in the periphery of the connection piece 21, an operator places the connection piece 21 on the edge of the air inlet of the fan 24, gaskets 22 are respectively sleeved on the six screws 20, then the six screws 20 are sequentially aligned with the six fixing holes 211 to be inserted, and the screws 20 are screwed, so that the screws 20 are screwed on the edge of the air inlet of the fan 24 until the head of the screws 20 tightly press the gaskets 22 on the connection piece 21, and the air guide sleeve 16 can be stably fixed.
Referring to fig. 2 and 3, the noise reduction device for the fan air inlet further includes a hole cover 11, the hole cover 11 is also in a conical structure, two ends of the hole cover 11 are both opened, and meanwhile, the taper of the hole cover 11 is the same as that of the air guide sleeve 16. An air inlet area is formed on the peripheral side of the hole cover 11, an air outlet area is formed at the end with a small opening of the hole cover 11, a cylindrical hole cylinder 13 is fixedly connected at one end of the air outlet area of the hole cover 11, the diameter of the hole cylinder 13 is equal to that of the end with the small opening of the hole cover 11, and the inside of the hole cylinder 13 is communicated with the inside of the hole cover 11. The perforated cover 11 and the perforated cylinder 13 are filled with a sound-deadening layer 15, and the sound-deadening layer 15 in this embodiment is made of sound-deadening cotton.
Referring to fig. 2 and 3, an orifice plate 12 is provided at the end of the escutcheon 11 having a large opening along the outer periphery, the inner edge of the orifice plate 12 is welded to the open end of the escutcheon 11, a cover plate 14 for closing the opening of the escutcheon 11 is provided at the end of the escutcheon 11 having a large opening, the peripheral side of the cover plate 14 is bent toward the escutcheon 11 to form a folded edge, and the folded edge is welded to the outer edge of the orifice plate 12, so that the cover plate 14 and the escutcheon 11 are fixed together, and the cover plate 14 stably closes the opening of the.
Referring to fig. 1 and 2, when installing the escutcheon 11, an operator first inserts the air outlet area of the escutcheon 11 into the air inlet of the fan 24, so that the hole cylinder 13 passes through the air guide sleeve 16, extends into the air inlet of the fan 24, and keeps a distance between the escutcheon 11 and the air guide sleeve 16 to form the air guide area 19, and also keeps a distance between the hole plate 12 and the edge of the air inlet of the fan 24. A connecting mechanism is arranged between the escutcheon 11 and the edge of the air inlet of the fan 24 for fixing the escutcheon 11.
Referring to fig. 1 and 2, the connection mechanism includes a plurality of connection rods 17, the number of the connection rods 17 may be six, six connection rods 17 are uniformly arranged along the periphery of the edge of the air inlet of the fan 24, and the six connection rods 17 and six screws 20 are arranged in a staggered manner, one end of the connection rod 17 facing the air inlet of the fan 24 is set as a second screw 172, the diameter of the second screw 172 is smaller than that of the connection rod 17, and after the second screw 172 penetrates through the connection piece 21, the connection rod is in threaded connection with the edge of the air inlet of the fan 24, so that the six connection rods 17 can be sequentially fixed.
Referring to fig. 1 and 2, the second screw 172 is sleeved with a gasket 22, a portion between the connecting rod 17 and the second screw 172 is set as a supporting rod 173, a diameter of the supporting rod 173 is smaller than a diameter of the connecting rod 17, but the diameter of the supporting rod 173 is larger than the diameter of the second screw 172, and an inner diameter of the gasket 22 is smaller than the diameter of the supporting rod 173, when the second screw 172 penetrates through the connecting piece 21 and is in threaded connection with the edge of the air inlet of the fan 24, the supporting rod 173 can support the gasket 22 on the connecting piece 21, so as to fix the connecting piece 21, and stably fix the air guide sleeve 16.
Referring to fig. 2 and 3, one end of the connecting rod 17, which is far away from the second screw 172, is set as a first screw 171, the diameter of the first screw 171 is smaller than that of the connecting rod 17, six connecting holes 141, which correspond to the six connecting rods 17 respectively, are formed on the cover plate 14 along the periphery, six through holes 121, which correspond to the six connecting holes 141 respectively, are formed on the orifice plate 12 along the periphery, before the first screw 171 is simultaneously threaded through the corresponding through holes 121 and connecting holes 141, a nut 18 is threaded on each first screw 171, then the first screw 171 is simultaneously threaded through the corresponding through holes 121 and connecting holes 141, then another nut 18 is threaded on each first screw 171, and at this time, an operator sequentially screws the two nuts 18 on each first screw 171, so that one nut 18 abuts against the top surface of the cover plate 14, and the other nut 18 abuts against the bottom surface of the orifice plate 12, so that the escutcheon 11 can be stably fixed.
Referring to fig. 2, in addition, each first screw 171 is sleeved with two washers 22, one washer 22 is pressed against the top surface of the cover plate 14 by one nut 18, and the other washer 22 is pressed against the bottom surface of the orifice plate 12 by the other nut 18, so that the fixing stability of the orifice cover 11 can be improved.
Referring to fig. 1 and 2, when the two nuts 18 are in the abutting state, the distance between the two nuts 18 is smaller than the length of the first screw 171, and the length of the first screw 171 can be set to be twice the distance between the two nuts 18 in the abutting state, in this case, the escutcheon 11 has an adjustment interval, and an operator can adjust the distance between the orifice plate 12 and the air inlet edge of the fan 24, so as to adjust a proper air inlet amount, and optimize the noise reduction effect. In the present embodiment, the distance between the perforated plate 12 and the edge of the air inlet of the fan 24 is adjusted to 120cm, which is the distance to achieve the best noise reduction effect.
Referring to fig. 1, when the fan 24 operates, an air inlet area is formed on the peripheral side of the escutcheon 11, so that the air inlet mode of the fan 24 is changed, the original axial inlet air of the fan 24 is changed into radial inlet air, the outside air is forcibly fed into the escutcheon 11 from the air inlet area, then passes through the silencing layer 15 and is finally fed into the air inlet of the fan 24, and in the process, the silencing layer 15 can play a good role in noise reduction on the air flow, so that the noise reduction effect of the fan 24 is improved, and the noise pollution generated when the fan 24 operates is reduced.
Referring to fig. 2, the flow guiding region 19 formed by the distance between the escutcheon 11 and the air guide sleeve 16 plays a role of guiding the air flow, so that the air flow is better fed into the escutcheon 11, and the noise reduction effect of the fan 24 is improved.
The implementation principle of the embodiment 1 is as follows: when the air guide sleeve 16 is installed, an operator inserts the end with the small opening of the air guide sleeve 16 into the air inlet aligned with the fan 24, puts the connecting piece 21 at the end with the large opening of the air guide sleeve 16 on the edge of the air inlet of the fan 24, then inserts the six screws 20 into the six fixing holes 211 in sequence in an aligned mode, and screws the screws 20 to enable the screws 20 to be in threaded connection with the edge of the air inlet of the fan 24 until the head of the screws 20 tightly press the gasket 22 on the connecting piece 21, so that the air guide sleeve 16 can be stably fixed;
then, installing the hole cover 11, wherein an operator firstly fixes six connecting rods 17 on the edge of the air inlet of the fan 24, the fixing mode of the connecting rods 17 is that after the second screw 172 penetrates through the connecting sheet 21, the connecting rods are in threaded connection with the edge of the air inlet of the fan 24, then each first screw 171 is in threaded connection with one nut 18, then the first screws 171 simultaneously penetrate through the corresponding through holes 121 and the corresponding connecting holes 141, then each first screw 171 is in threaded connection with another nut 18, at the moment, the operator sequentially screws the two nuts 18 on each first screw 171, so that one nut 18 is tightly abutted against the top surface of the cover plate 14, and the other nut 18 is tightly abutted against the bottom surface of the hole plate 12, and the hole cover 11 can be stably fixed;
when the fan 24 operates, outside air is forcibly fed into the hole cover 11 from the air inlet area, then passes through the silencing layer 15 and is finally fed into the air inlet of the fan 24, and in the process, the silencing layer 15 can well reduce noise of air flow.
Example 2
Referring to fig. 4 and 5, the difference between this embodiment and embodiment 1 is that the connection mechanism includes a plurality of flow deflectors 23, the number of the flow deflectors 23 may be six, the six flow deflectors 23 are uniformly arranged along the periphery of the flow guiding area 19, one end of the flow deflector 23 extends between the orifice plate 12 and the connection piece 21, the other end of the flow deflector 23 extends between the small opening end of the flow guiding hood 16 and the orifice cylinder 13, and one sidewall of the flow deflector 23 is welded and fixed with the connection piece 21 and the flow guiding hood 16 in sequence, and the other sidewall of the flow deflector 23 is welded and fixed with the orifice plate 12, the orifice hood 11 and the orifice cylinder 13 in sequence, so that the orifice hood 11 can be stably supported and fixed.
Referring to fig. 4 and 5, the six deflectors 23 fix the escutcheon 11 and the pod 16 into a whole, and an operator can assemble and disassemble the pod 16 together with the escutcheon 11, so that the convenience of operation is improved. Meanwhile, the guide plate 23 can also guide the airflow, so that the airflow is better sent into the hole cover 11, and the noise reduction effect of the fan 24 is improved.
The implementation principle of the embodiment 2 is as follows: before installing the air guide sleeve 16 and the escutcheon 11, an operator firstly evenly places six guide plates 23 in a guide area 19 formed between the air guide sleeve 16 and the escutcheon 11, so that one end of each guide plate 23 extends between the pore plate 12 and the connecting piece 21, the other end of each guide plate 23 extends between one end with a small opening of the air guide sleeve 16 and the escutcheon 13, one side wall of each guide plate 23 is sequentially welded and fixed with the connecting piece 21 and the air guide sleeve 16, the other side wall of each guide plate 23 is sequentially welded and fixed with the pore plate 12, the escutcheon 11 and the escutcheon 13, the escutcheon 11 and the air guide sleeve 16 can be fixed into a whole, and when the air guide sleeve 16 is assembled and disassembled, the operator can assemble and.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a device of making an uproar falls in fan air intake which characterized in that: including escutcheon (11), the week side of escutcheon (11) forms the air inlet district, the one end of escutcheon (11) forms the exhaust zone, the one end that the exhaust zone was kept away from in escutcheon (11) is provided with cover plate (14), be provided with noise damping layer (15) in the region of cover plate (14) and escutcheon (11) formation, be provided with coupling mechanism on escutcheon (11).
2. The fan air inlet noise reduction device according to claim 1, wherein: the connecting mechanism comprises a plurality of connecting rods (17), the connecting rods (17) are arranged at intervals along the peripheral side of the cover plate (14), one end of the connecting rod (17) facing the cover plate (14) is provided with a first screw rod (171), one end of the connecting rod (17) far away from the cover plate (14) is provided with a second screw rod (172), a plurality of connecting holes (141) corresponding to the connecting rods (17) are arranged on the peripheral edge of the cover plate (14), one end of the hole cover (11) far away from the air outlet area is provided with a plurality of through holes (121) corresponding to the connecting holes (141) along the periphery, the first screw (171) penetrates through the corresponding through hole (121) and the connecting hole (141) at the same time, both ends of the first screw (171) are in threaded connection with nuts (18), one of the nuts (18) abuts against the top surface of the cover plate (14), and the other nut (18) abuts against the bottom surface of the hole cover (11).
3. The fan air inlet noise reduction device according to claim 2, wherein: when one nut (18) abuts against the top surface of the cover plate (14) and the other nut (18) abuts against the bottom surface of the hole cover (11), the distance between the two nuts (18) is smaller than the length of the first screw (171).
4. The fan air inlet noise reduction device according to claim 2, wherein: the outer portion of the hole cover (11) located at one end of the air outlet area is covered with a flow guide cover (16), a flow guide area (19) is formed between the flow guide cover (16) and the hole cover (11), and a connecting assembly is arranged on the flow guide cover (16).
5. The fan air inlet noise reduction device according to claim 4, wherein: coupling assembling includes a plurality of screws (20), and is a plurality of screw (20) set up along kuppe (16) towards the periphery interval of connecting rod (17) one end, kuppe (16) are provided with connection piece (21) along the periphery towards the one end of connecting rod (17), follow the periphery on connection piece (21) and offer a plurality of fixed orificess (211) corresponding with the position of screw (20), screw (20) are worn to establish corresponding fixed orifices (211).
6. The fan air inlet noise reduction device according to claim 5, wherein: the connecting piece (21) is worn to establish by the second screw rod (172), the part between connecting rod (17) and second screw rod (172) is established to support tight pole (173), the diameter of supporting tight pole (173) is greater than the diameter of second screw rod (172), it is equipped with gasket (22) to lie in on second screw rod (172) to support between tight pole (173) and connecting piece (21), the internal diameter of gasket (22) is less than the diameter of supporting tight pole (173), just gasket (22) are pressed from both sides tightly between tight pole (173) and connecting piece (21).
7. The fan air inlet noise reduction device according to claim 1, wherein: one end of the hole cover (11) located in the air outlet area is provided with a hole cylinder (13), the inside of the hole cylinder (13) is communicated with the inside of the hole cover (11), and the sound attenuation layer (15) is filled into the hole cylinder (13).
8. The fan air inlet noise reduction device according to claim 4, wherein: the connecting mechanism comprises a plurality of guide plates (23), the guide plates (23) are arranged at intervals along the periphery of the flow guide area (19), one side of each guide plate (23) is arranged on the corresponding guide hood (16), and the other side of each guide plate (23) is arranged on the corresponding hole cover (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022147256.9U CN213116881U (en) | 2020-09-25 | 2020-09-25 | Noise reduction device for air inlet of fan |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022147256.9U CN213116881U (en) | 2020-09-25 | 2020-09-25 | Noise reduction device for air inlet of fan |
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| CN213116881U true CN213116881U (en) | 2021-05-04 |
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| CN202022147256.9U Active CN213116881U (en) | 2020-09-25 | 2020-09-25 | Noise reduction device for air inlet of fan |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112096663A (en) * | 2020-09-25 | 2020-12-18 | 南京风机厂有限公司 | Noise reduction device for air inlet of fan |
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2020
- 2020-09-25 CN CN202022147256.9U patent/CN213116881U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112096663A (en) * | 2020-09-25 | 2020-12-18 | 南京风机厂有限公司 | Noise reduction device for air inlet of fan |
| CN112096663B (en) * | 2020-09-25 | 2022-07-12 | 南京风机厂有限公司 | Noise reduction device for air inlet of fan |
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Effective date of registration: 20230727 Address after: No. 69, Baoxiang Road, Jiangning District, Nanjing, Jiangsu 211100 Patentee after: Nanjing Ningrun Fan Co.,Ltd. Address before: No. 20, Fengji Avenue, Yuhua Economic Development Zone, Yuhuatai District, Nanjing, Jiangsu 210012 Patentee before: Nanjing Fan Factory Co.,Ltd. |
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| TR01 | Transfer of patent right |