WO2018176234A1 - 基座及无叶风扇 - Google Patents

基座及无叶风扇 Download PDF

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Publication number
WO2018176234A1
WO2018176234A1 PCT/CN2017/078466 CN2017078466W WO2018176234A1 WO 2018176234 A1 WO2018176234 A1 WO 2018176234A1 CN 2017078466 W CN2017078466 W CN 2017078466W WO 2018176234 A1 WO2018176234 A1 WO 2018176234A1
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WO
WIPO (PCT)
Prior art keywords
cover
power system
muffler
muffling
muffler cover
Prior art date
Application number
PCT/CN2017/078466
Other languages
English (en)
French (fr)
Inventor
李忠华
程杰锋
魏喜明
Original Assignee
美的集团股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 美的集团股份有限公司 filed Critical 美的集团股份有限公司
Priority to PCT/CN2017/078466 priority Critical patent/WO2018176234A1/zh
Priority to CN201780001080.4A priority patent/CN107636315B/zh
Publication of WO2018176234A1 publication Critical patent/WO2018176234A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing

Definitions

  • the present invention relates to the field of fans, and more particularly to a base and a bladeless fan.
  • Existing leafless fans include a base.
  • the base includes a housing and a power system disposed within the housing.
  • the outer casing is formed with an air inlet, and during operation, the power system draws in air through the air inlet and establishes an air flow.
  • the noise emitted by the power system can be diffused outward through the air inlet, resulting in a large noise of the bladeless fan.
  • the present invention aims to at least solve one of the technical problems existing in the related art. To this end, embodiments of the present invention provide a pedestal and a bladeless fan.
  • a susceptor according to an embodiment of the present invention is used for a bladeless fan, the pedestal comprising: a housing, the housing including an outer wall, the outer wall being formed with an air inlet; a power system disposed in the housing, the a power system for drawing in air through the air inlet and establishing an air flow, the power system being formed with an air inlet; and a sound absorbing structure disposed in the housing, the sound absorbing structure comprising: a first sound absorbing cover, The first muffler is formed with a first muffling cavity, the first muffler is provided with a first conductive hole communicating with the air inlet; and the second muffling is received in the first muffling cavity a cover, the second muffler cover surrounds the air inlet, the second muffler is formed with a second muffling cavity that communicates with the air inlet, and the second muffler is open to communicate with the second a second conductive via of the anechoic cavity; and a connecting tube connecting
  • the cross-sectional area of the second via hole is smaller than the cross-sectional area of the second muffler cavity.
  • the number of the connecting tubes is plural, and the number of the first through holes and the number of the second through holes are the same as the number of the connecting tubes, and the plurality of connections a tube is distributed along a circumferential interval of the first muffler cover, a distribution position of the plurality of connecting tubes and a distribution position of the plurality of first via holes and a distribution position of the plurality of second via holes correspond.
  • the plurality of connecting tubes are evenly spaced along the circumference of the first muffler cover.
  • the connecting tube has an inner diameter of 10-40 mm and the connecting tube has a length of 5-15 mm.
  • the perforations have a diameter of from 1 to 4 mm.
  • the number of perforations is a plurality, and the plurality of perforations are arranged in a plurality of perforation arrays, the plurality of perforation arrays being spaced apart.
  • the plurality of perforated arrays are evenly spaced along the circumferential direction of the tube wall of the connecting tube.
  • the first muffler cover and the second muffler cover are both cylindrical, and the first muffler cover is disposed coaxially with the second muffler cover.
  • the base includes a sound absorbing cotton disposed between the first muffler cover and the second muffler cover, the sound absorbing cotton being located in the cavity portion and covering the perforation.
  • the sound absorbing structure includes a mounting plate coupled to the first muffling cover and the second muffler cover, and the muffling structure is fixed to the housing by the mounting plate on.
  • the power system is coupled to the outer wall by an elastic member and is elastically suspended within the housing.
  • a first fixing plate and a second fixing plate are fixed in the housing, and the number of the elastic members is plural, and the plurality of elastic members constitute a first elastic member group and a second elastic member.
  • the first elastic member group elastically connects the upper end of the power system and the first fixing plate
  • the second elastic member group elastically connects the lower end of the power system and the second fixing plate.
  • a plurality of the elastic members of the first elastic member group are evenly spaced along a circumferential direction of the power system; and the plurality of elastic members of the second elastic member group are along the The circumferential direction of the power system is evenly spaced.
  • the positions of the plurality of elastic members of the first elastic member group in the circumferential direction of the power system and the plurality of elastic members of the second elastic member group are respectively The positions of the power system in the circumferential direction correspond one-to-one.
  • the upper end of the first muffler cover is provided with a convex ring
  • the upper end of the second muffler cover is provided with an annular side edge
  • the lower surface of the side edge is provided with an annular shape a groove, the convex ring being tightly received in the groove.
  • a bladeless fan according to an embodiment of the present invention includes a fan head and a base of any of the above embodiments, the fan head being disposed on the base, the fan head being used to establish the airflow established by the power system Spray out.
  • the power system includes an intake end and an air outlet end, the air outlet end being closer to the fan head than the air intake end, and the air inlet end is provided with the air inlet port;
  • the vaneless fan includes an annular seal that sealingly connects the fan head and the air outlet end.
  • the seal includes a first end and a second end, the first end sealingly connecting the gas outlet end, the first end is in a tapered expanded configuration; and the second end is sealingly connected The fan head, the end face of the second end A positioning slot is opened, and the positioning slot is snapped into the fan head.
  • the fan head is provided with an air gap slit, and the air outlet slit is curved.
  • the power system works because the through hole of the connecting pipe wall communicates with the cavity portion of the first muffler cavity between the first muffler cover and the second muffler cover.
  • the noise generated will be perforated into the cavity portion, and the noise will be reflected back and forth inside the cavity portion, thereby reducing the noise when the bladeless fan is working.
  • FIG. 1 is a perspective view of a bladeless fan according to an embodiment of the present invention.
  • FIG. 2 is a perspective view of a susceptor according to an embodiment of the present invention.
  • FIG. 3 is a schematic cross-sectional perspective view of a susceptor according to an embodiment of the present invention.
  • FIG. 4 is a partial perspective view of a susceptor according to an embodiment of the present invention.
  • Figure 5 is a perspective view of a sound absorbing structure according to an embodiment of the present invention.
  • FIG. 6 is a schematic perspective cross-sectional view of a sound absorbing structure according to an embodiment of the present invention.
  • Figure 7 is a plan view showing a sound absorbing structure according to an embodiment of the present invention.
  • FIG. 8 is a schematic perspective cross-sectional view of a first muffler cover of a muffling structure according to an embodiment of the present invention.
  • FIG. 9 is a schematic perspective cross-sectional view of a second muffler cover of the muffling structure according to an embodiment of the present invention.
  • Figure 10 is another schematic cross-sectional view of a susceptor according to an embodiment of the present invention.
  • Fig. 11 is a schematic view showing a sound pressure curve of a bladeless fan according to an embodiment of the present invention.
  • first and second are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
  • features defining “first” or “second” may include one or more of the described features either explicitly or implicitly.
  • the meaning of "a plurality” is two or more unless specifically and specifically defined otherwise.
  • connection In the description of the present invention, it should be noted that the terms “installation”, “connected”, and “connected” are to be understood broadly, and may be fixed or detachable, for example, unless otherwise explicitly defined and defined. Connected, or integrally connected; may be mechanically connected, may be electrically connected or may communicate with each other; may be directly connected, or may be indirectly connected through an intermediate medium, may be internal communication of two elements or interaction of two elements relationship.
  • Connected, or integrally connected may be mechanically connected, may be electrically connected or may communicate with each other; may be directly connected, or may be indirectly connected through an intermediate medium, may be internal communication of two elements or interaction of two elements relationship.
  • the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.
  • the first feature "on” or “under” the second feature may include direct contact of the first and second features, and may also include first and second features, unless otherwise specifically defined and defined. It is not in direct contact but through additional features between them.
  • the first feature "above”, “above” and “above” the second feature includes the first feature directly above and above the second feature, or merely indicating that the first feature level is higher than the second feature.
  • the first feature “below”, “below” and “below” the second feature includes the first feature directly below and below the second feature, or merely the first feature level being less than the second feature.
  • a bladeless fan 1000 of an embodiment of the present invention includes a base 100 and a fan head 102.
  • the fan head 102 is disposed on the base 100.
  • the fan head 102 can blow out the wind.
  • the bladeless fan 1000 is not easy to injure the user's fingers or the like because there is no exposed blade, and therefore, the bladeless fan 1000 has a safety feature.
  • the bladeless fan 1000 is small in size, making it easy for the user to clean the leafless fan 1000.
  • the base 100 includes a housing 10 , a power system 20 , and a sound absorbing structure 40 .
  • the power system 20 is disposed within the housing 10.
  • the muffling structure 40 is disposed within the housing 10.
  • the housing 10 includes a bottom plate 11 and an outer wall 12.
  • the bottom plate 11 extends outward from the outer wall 12 to make the bladeless fan 1000
  • the support surface is stably supported on the support surface, for example, a plane such as a floor or a table top.
  • the outer wall 12 is annular, and the annular outer wall 12 makes the bladeless fan 1000 more aesthetically pleasing, and the surface area of the outer wall 12 can be increased to make the inlet area larger.
  • the outer wall 12 is formed with an air inlet 121, and the air inlet 121 is formed with a plurality of air intake holes 1211 arranged in an array.
  • the air inlet 121 enables the power system 20 to draw in air to establish an air flow, such that the bladeless fan 1000 can form a wind to meet the needs of the user.
  • a plurality of intake holes 1211 are distributed along the circumferential direction of the outer wall 12. This results in a larger air intake area of the air inlet 121, which is advantageous for increasing the flow of air into the susceptor 100. In addition, it is also possible to allow air to enter from the periphery of the casing 10 to make the airflow into the susceptor 100 more uniform, thereby reducing noise when the air flows.
  • the air inlets 121 are arranged in a plurality of arrays along the circumferential direction of the outer wall 12, and the adjacent two arrays are spaced apart. As shown in Figure 2, the outer wall 12 between the array of adjacent two inlet ports 121 is of continuous construction. In addition, this also facilitates the formation of the intake holes 1211, thereby improving the yield of the housing 10.
  • the air inlet 121 is disposed close to the bottom plate 11, so that the air moves from the bottom up to the power system 20 to shorten the path and resistance of the air, and therefore, the air inlet 121 is disposed close to the bottom plate 11 to reduce noise generated by the air flow.
  • Each of the intake holes 1211 has a circular shape, and the diameter of the intake holes 1211 is 1-3 mm.
  • the diameter of the intake hole 1211 is 2 mm. This can reduce the noise generated when the gas flows while ensuring that the bladeless fan 1000 normally draws in air.
  • the spacing between adjacent two intake holes 1211 is 1-3 mm.
  • the interval between adjacent two intake holes 1211 is 2 mm. This can reduce the noise generated when the air flows.
  • the housing 10 also includes a partition 14 that extends inwardly from the outer wall 12.
  • the partition 14 is formed with a through hole 141 which is disposed coaxially with the outer wall 12.
  • the power system 20 is used to draw in air through the air inlet 121 and establish an air flow.
  • the powertrain 20 includes an impeller casing 21, an impeller 22, a motor 23, a diffuser 24, and a motor casing 25.
  • the impeller casing 21 is mounted in the casing 10, and the impeller casing 21 is formed with an air inlet 211 communicating with the intake port 121.
  • the impeller 22 is disposed within the impeller casing 21.
  • the motor 23 is used to drive the impeller 22. Specifically, the motor 23 is located in the impeller casing 21, and the output shaft of the motor 23 is fixedly coupled to the impeller 22 so that the impeller 22 can be driven to rotate when the motor 23 is in operation.
  • the diffuser 24 is disposed downstream of the air flow generated by the impeller 22, and the diffuser 24 is coupled to the impeller casing 21. Dilatation The device 24 can pressurize, decelerate and decelerate the high velocity airflow generated by the impeller 22 to direct the high velocity airflow to the fan head 102.
  • the diffuser 24 includes a plurality of fins 241 which can integrate the high-speed airflow generated by the impeller 22 and can achieve the effect of eliminating the cyclone so as to be discharged from the air outlet 242 of the diffuser 24.
  • the airflow is softer.
  • the motor housing 25 is formed outside the motor 23 and is used to fix the motor 23.
  • the motor housing 25 is connected to the impeller housing 21.
  • the motor housing 25 can prevent the motor 23 from shaking during operation.
  • a gas passage 25a is formed between the motor casing 25 and the impeller casing 21, and the gas passage 25a and the diffuser 24 are in communication.
  • the airflow generated when the impeller 22 rotates passes through the gas passage 25a and then flows to the diffuser 24, passes through the diffuser 24, and flows out of the diffuser 24 to enter the fan head 102.
  • the sound absorbing structure 40 includes a first muffler cover 41, a second muffler cover 42, and a connecting tube 44.
  • the first muffler cover 41 is formed with a first muffling cavity 411, and the first muffler cover 41 is provided with a first through hole 412.
  • the first via hole 412 communicates with the air inlet 121.
  • the second muffler cover 42 is received in the first muffler cavity 411, the second muffler cover 42 surrounds the air inlet 211, and the second muffler cover 42 is formed with a second muffler cavity 421 communicating with the air inlet 211.
  • the cover 42 is provided with a second through hole 422 that communicates with the second muffling chamber 421.
  • the connecting tube 44 is connected to the first muffling cover 41 and the second muffling cover 42 and correspondingly communicates with the first through hole 412 and the second through hole 422.
  • the pipe wall of the connecting pipe 44 is provided with a through hole 441, and the through hole 441 is connected.
  • the power system 20 is connected to the cavity portion 4111 of the first muffling cavity 411 between the first muffling cover 41 and the second muffling cover 42 due to the through hole 441 of the pipe wall of the connecting pipe 44.
  • noise generated when air is taken in from the air inlet 121 enters the cavity portion 4111 through the through hole 441, and noise is reflected and consumed inside and outside the cavity portion 4111, thereby reducing noise during operation of the bladeless fan 1000.
  • the first muffler cover 41 includes a first substrate 416 and a first side plate 417.
  • the first side plate 417 is disposed on the first substrate 416.
  • the first side plate 417 is annular and connected to the first substrate.
  • the second muffler cover 42 includes a second substrate 426 and a second side plate 427 disposed on the second substrate 426.
  • the second side plate 427 is annular and connected to the edge of the second substrate 426. .
  • the second substrate 426 is fixedly coupled with the first substrate 416 such that the first muffler cover 41 and the second muffler cover 42 are fixed, and at the same time, the first muffler cover 41 and the second muffling cover are caused.
  • the cavity portion 4111 of the first muffling cavity 411 between the covers 42 is annular to form a cavity that causes noise to be reflected cyclically, further reducing noise.
  • the first substrate 416 and the second substrate 426 can be fixed by screwing.
  • the first substrate 416 and the second substrate 426 are each provided with a mounting hole 418 through which the screw is inserted to fix the first substrate 416 and the second substrate 426 together.
  • the screw can be further connected to the bottom plate 11 of the base 100, and the sound absorbing structure 40 is fixed to the bottom plate 11.
  • the connecting tube 44 connects the inner surface of the first muffler cover 41 and the outer surface of the second muffler cover 42.
  • the sound absorbing structure 40 is easy to manufacture, reducing the cost of the bladeless fan 1000.
  • the cross-sectional area of the second via 422 is smaller than the cross-sectional area of the second silencing cavity 421.
  • the noise is difficult to propagate from the second muffler cavity 421 having a large cross-sectional area to the second via hole 421 having a small cross-sectional area, so that the sound is reflected back and forth in the second muffler cavity 421, and the bladeless fan 1000 is reduced. noise.
  • the number of the connecting tubes 44 is plural, the number of the first conductive vias 412 and the number of the second conductive vias 422 are the same as the number of the connecting tubes 44, and the plurality of connecting tubes 44 are along the first eliminating
  • the sound shields 41 are circumferentially spaced apart, and the distribution positions of the plurality of connecting tubes 44 correspond to the distribution positions of the plurality of first via holes 421 and the distribution positions of the plurality of second via holes 422.
  • the noise generated when the air enters the casing 10 can be more penetrated into the cavity portion 4111 through the through hole 441 to perform reflection elimination, further reducing the noise of the bladeless fan 1000.
  • the number of the connection tubes 44, the number of the first via holes 412, and the number of the second via holes 422 are all six.
  • the connecting tube 44 has a hollow cylindrical shape, and the first through hole 412 and the second through hole 422 are both circular.
  • the axes X of the plurality of connecting tubes 44 are distributed on the same horizontal plane to form a connecting tube layer. It can be understood that in other examples, the axes X of the plurality of connecting tubes 44 may also be distributed on different horizontal planes to form two or more connecting tube layers.
  • the number of the connecting tubes 44 may also be other numbers.
  • the number of the connecting tubes 44 ranges from 3 to 9, which ensures a certain amount of air intake and also has a better sound and noise cancellation effect.
  • the number of the connecting tubes 44 may be 1, 2, 4, 5, 8, 12, and the like.
  • the plurality of connecting tubes 44 are evenly spaced along the circumference of the first muffler cover 41. In this way, the uniform noise cancellation capability of the muffling structure 40 in all directions is achieved, and the user experience is improved.
  • the number of the connection tubes 44, the number of the first via holes 421, and the number of the second via holes 422 are all six.
  • the six connecting pipes 44 are evenly spaced along the circumferential direction of the first muffler cover 41, that is, the angle formed by the axes X of the adjacent two connecting pipes 44 is 60 degrees, and at the same time, each of the first conducting pipes
  • the hole 412 and each of the second via holes 422 are in one-to-one correspondence with the connecting pipe 44, as shown in FIG.
  • the connecting tube 44 has an inner diameter of 10-40 mm and the connecting tube 44 has a length of 5-15 mm. In this way, a better balance between the intake air volume and the sound insulation effect is ensured.
  • the inner diameter of the connecting tube 44 refers to the diameter of the passage formed in the connecting tube 44.
  • the perforations 441 have a diameter of from 1 to 4 mm. In this way, a better balance between the intake air volume and the sound insulation effect is ensured.
  • the perforations 441 are circular holes.
  • the number of perforations 441 is multiple, and the plurality of perforations 441 are arranged in a plurality of perforated arrays, the plurality of perforated arrays being spaced apart. In this way, noise in the connecting pipe 44 can be introduced into the cavity portion of the first muffling cavity 411 from a plurality of directions, and the sound absorbing noise suppressing effect is ensured.
  • the plurality of perforated arrays are evenly spaced along the circumference of the tube wall of the connecting tube 44.
  • each perforated array includes a plurality of perforations 441, and a plurality of perforations 441 of each perforated array are aligned along the axis X of the connecting tube 44.
  • the manufacturing process of the connecting pipe 44 is relatively simple, and the cost of the susceptor 100 is reduced.
  • first muffler cover 41 and the second muffler cover 42 are both cylindrical, and the first muffler cover 41 is disposed coaxially with the second muffler cover 42.
  • the first muffler cover 41 and the second muffler cover 42 are easy to manufacture, and the coaxial arrangement allows the muffling structure 40 to have a relatively uniform muffling effect in all directions.
  • the base 100 includes sound absorbing cotton (not shown) disposed between the first muffler cover 41 and the second muffler cover 42.
  • the sound absorbing cotton is located in the cavity portion 4111 and covers the perforations 441.
  • the noise entering the cavity portion 4111 of the first muffling cavity 411 from the through hole 441 is absorbed by the sound absorbing cotton, and the noise entering the cavity portion 4111 is repeatedly consumed, further improving the noise reduction effect of the bladeless fan 1000.
  • the sound absorbing cotton has a plurality of staggered pores, it has a good sound absorbing effect.
  • the sound absorbing cotton has a thickness of 5-15 mm.
  • the sound absorbing structure 40 includes a mounting plate 43 that is coupled to the first muffler cover 41 and the second muffler cover 42 and the muffling structure 40 is secured to the housing 10 by a mounting plate 43.
  • the sound absorbing structure 40 is installed by the mounting plate 43 without adversely affecting the first muffler cover 41 and the second muffler cover 42.
  • the mounting plate 43 is disposed at the upper end of the second muffling cover 42 and has an annular shape.
  • the mounting plate 43 and the second muffling cover 42 are integrally formed.
  • the mounting plate 43 and the second muffling cover 42 are assembled together to the first muffler cover 41, so that The second muffler cover 42 is housed in the first muffling chamber 411, and the first muffler cover 41 is mounted with the mounting plate 43 and then mounted to the casing 10 through the mounting plate 43.
  • the mounting plate 43 is provided with a plurality of screw holes 43a, and the mounting plate 43 can be fixed to the partition plate 14 through the screw holes 43a.
  • the mounting plate 43 is provided with a through hole 43b, and the through hole 43b communicates with the second muffling chamber 421.
  • the power system 20 is partially received in the second muffling chamber 421 through the through hole 43b, so that the second muffler cover 42 surrounds the air inlet 211.
  • the upper end of the first muffler cover 41 is provided with a convex ring 419
  • the upper end of the second muffler cover 42 is provided with an annular side edge 428, the side edge 428
  • the lower surface is provided with an annular groove 429, and the convex ring 419 is tightly received in the groove 429, as shown in FIG.
  • the cavity portion 4111 of the first muffling cavity 411 located between the first muffler cover 41 and the second muffling cover 42 can be formed into a relatively sealed chamber, so that noise in the cavity portion 4111 is not easy or impossible. Propagating to the outside further improves the noise reduction effect of the bladeless fan 1000.
  • the side edge 428 and the mounting plate 43 are connected to the upper end of the second muffler cover 42 to form a plate body 431.
  • the material of the muffling structure 40 can be saved and the manufacturing difficulty can be reduced.
  • the fan head 102 is formed with a wind tunnel and an air outlet slit 1021 that communicates with the air passage, and the air outlet slit 1021 is curved.
  • the fan head 102 is in communication with the base 100 to deliver airflow generated by the powertrain 20 into the air duct and out of the air gap 1021.
  • the air outlet slot 1021 forms a nozzle.
  • the curved air outlet slit 1021 can increase the air outlet area of the bladeless fan, thereby improving the user experience.
  • a foam may be disposed in the air passage of the fan head 102.
  • the foam can absorb the noise generated in the air passage, so that the noise of the bladeless fan 1000 can be reduced.
  • the upwardly extending portion of the fan head 102 is curved so that the air passage is curved, thereby reducing noise generated when the air flows.
  • the power system 20 includes an intake end 28 and an air outlet end 29.
  • the air outlet end 29 is closer to the fan head 102 than the intake end 28, and the air inlet end 28 is provided with an air inlet 211.
  • the bladeless fan 1000 includes an annular seal 80 that seals the connection between the fan head 102 and the air outlet end 29. In this way, the arrangement of the sealing member 80 can reduce the probability that the airflow is poured from the fan head 102 into the cavity of the base 100, thereby reducing wind noise and improving the air blowing effect of the bladeless fan 1000.
  • the fan head 102 is generally longer than the base 100, which makes the path of the airflow to the air passage longer, the resistance is larger, and the air duct has a curved shape, which makes the path Longer, more resistant. If the sealing member 80 is lacking, since the path of the air passage is long and the resistance is large, the airflow is easily poured into the cavity of the base 100, and a large wind noise is formed, and the air blowing effect is poor.
  • the sealing member 80 is disposed such that the sealing member 80 and the air outlet end 29 of the power system 20 and the fan head 102 are in a sealed state, which solves the above problems.
  • the seal 80 may be a silicone sealed hose having a hardness in the range of 50-60 and a moderately elastic stretch.
  • the seal 80 includes a first end 81 that is sealingly coupled to the gas outlet end 29 and a second end 82 that has a tapered expanded configuration.
  • the second end 82 is sealingly connected to the fan head 102.
  • the end surface of the second end 82 is provided with a positioning groove 821, and the positioning groove 821 is inserted into the fan head 102.
  • the structure of the seal 80 facilitates the mounting of the fan head 102 and the seal 80 on the base 100 and improves the sealing of the air outlet end 29 and the fan head 102.
  • the sealing member 80 and the fan head 102 are mounted on the base 100, the positioning groove 821 of the second end 82 is first directly caught in the fan head 102, and the fan head 102 with the sealing member 80 is mounted on the When the base 100 is on, the fan 102 with the sealing member 80 slides downward through the open end of the base 100 to directly fit the first end 81 into the air outlet end 29 of the power system 20 to complete the sealing connection of the sealing member 80.
  • the outlet end 29 of the 20 and the fan head 102 is the sealing member 80 and the fan head 102.
  • the number of the positioning grooves 821 is two, the second end 82 is circular, and the two positioning grooves 821 are arranged at intervals along the radial direction of the second end 82.
  • a connecting plate 50 is disposed between the base 100 and the fan head 102.
  • the connecting plate 50 connects the base 100 and the fan head 102.
  • the connecting plate 50 is connected to the upper edge of the outer wall 12.
  • a first fixing plate 26 is fixedly disposed on the connecting plate 50, and a second fixing plate 27 is fixedly disposed on the partition plate 14.
  • the second fixing plate 27 and the first fixing plate 26 are both located in the casing 10.
  • the elastic member 70 is stretched and connected to the first fixing plate 26 and the power system 20, and is connected to the second fixing plate 27 and the power system 20. That is, the power system 20 is coupled to the outer wall 12 by the elastic member 70 and elastically suspended within the housing 10.
  • the elastic member 70 allows the power system 20 to be suspended, and the vibration generated by the power system 20 is not directly transmitted to the casing 10, so that noise generated by the susceptor 100 can be reduced.
  • the upper surface of the second fixing plate 27 is provided with a first fixing portion 271, and the lower end of the power system 20 is provided with a second fixing portion 272.
  • the first fixing portion 271 is provided with a first card hole
  • the second The fixing portion 272 is provided with a second card hole.
  • One end of the elastic member 70 can hook the first card hole, and the other end of the elastic member 70 can hook the second card hole to elastically suspend the power system 20 in the casing 10.
  • the first card hole and the second card hole are each formed with a chamfered structure, so that the elastic member 70 is more conveniently installed.
  • the lower surface of the first fixing plate 26 and the upper end of the power system 20 are provided with a similar structure to the above-described fixing portion.
  • the elastic member 70 can be mounted by other means.
  • the first fixing plate 26 can be directly fixed to the inner surface of the outer wall 12 and the second fixing plate 27 can be directly fixed to the inner surface of the outer wall 12.
  • the first fixing plate 26 and the second fixing plate 27 are spaced apart.
  • the resilient member 70 is a tension spring.
  • the tensile spring 70 has a stiffness coefficient of 2-4 N/mm and an original length of 15-25 mm.
  • the tension spring 70 has a stiffness coefficient of 3 N/mm and an original length of 20 mm.
  • the number of the elastic members 70 is plural, and the plurality of elastic members 70 include a first elastic member group and a second elastic member group, and the first elastic member group is connected to the first fixing plate 26 and the power system 20 Upper end.
  • the plurality of elastic members 70 of the first elastic member group are evenly spaced along the circumferential direction of the power system 20.
  • the number of the elastic members 70 of the first elastic member group is three, and the angle between the adjacent two elastic members 70 is 120 degrees.
  • the second elastic member group connects the second fixing plate 27 and the lower end of the power system 20.
  • the plurality of elastic members 70 of the second elastic member group are evenly spaced along the circumferential direction of the power system 20.
  • the number of the elastic members 70 of the second elastic member group is three, and the angle between the adjacent two elastic members 70 is 120 degrees.
  • the upper end of the power system 20 is provided with an air outlet end 29, and the lower end of the power system 20 is provided with an air inlet end 28.
  • the positions of the plurality of elastic members 70 of the first elastic member group in the circumferential direction of the power system 20 and the plurality of elastic members 70 of the second elastic member group in the circumferential direction of the power system 20 are respectively A correspondence.
  • the elastic member 70 can provide a uniform supporting force to prevent the elastic member 70 of the first elastic member group from being displaced from the elastic member 70 of the second elastic member group to cause excessive sway of the power system 20 during operation.
  • the motor 23 drives the impeller 22 to rotate, and the air is sequentially sucked by the impeller 22 through the air inlet 121, the muffling structure 40, and the air inlet 211, and the impeller 22 accelerates the air.
  • a high-speed airflow is formed, and the high-speed airflow sequentially passes through the gas passage 25a and the diffuser 24, enters the air passage of the fan head 102, and finally is ejected from the air outlet slot 1021, so that the high-speed airflow ejected from the wind gap 1021 can be sucked.
  • the surrounding air forms a wind to achieve a cooling effect for the user.
  • the first through hole 412 of the first muffling cover 41 enters the connecting pipe 44 through the connecting pipe 44 and the second guide.
  • the through hole 422 enters the second muffling chamber 421 and then enters the power system 20 via the air inlet 211.
  • noise enters the cavity portion 4111 from the through hole 441 to be reflected and removed, and is absorbed by the sound absorbing cotton.
  • the air enters the second muffler cover 42 from the first muffler cover 41 belongs to a process of flowing into a large cross section from a small cross section.
  • the sound is attenuated and reduced during the process from a small cross section to a large cross section. .
  • the muffling structure 40 of the embodiment of the present invention forms an impedance composite perforated tubular muffler, which forms a process when the airflow passes, the sound is attenuated and reduced, and the noise is reduced, and the sound is difficult to reverse from the first
  • the second muffler cover 42 is transmitted through the connecting pipe 44, and the sound is reflected back and forth to be consumed, and the energy of the noise is blocked and attenuated.
  • the curve a is a sound pressure level curve when the vaneless fan 1000 omits the muffling structure 40
  • the curve b is The sound pressure level curve when the sound absorbing structure 40 is provided in the bladeless fan 1000.
  • the ordinate SPL indicates the sound pressure level of the sound generated by the bladeless fan 1000
  • the abscissa f indicates the frequency of the sound generated by the bladeless fan 1000.
  • the susceptor 100 of the embodiment of the present invention includes:
  • the housing 10 includes an outer wall 12, the outer wall 12 is formed with an air inlet 121;
  • the power system 20 is configured to draw in air through the air inlet 121 and establish an air flow, and the power system 20 is formed with an air inlet 211;
  • the sound absorbing structure 40 disposed in the housing 10, the sound absorbing structure 40 includes:
  • the first muffler cover 41, the first muffler cover 41 is formed with a first muffler cavity 411, the first muffler cover 411 is provided with a first through hole 412 communicating with the air inlet 121;
  • the second muffler cover 42 is received in the first muffler chamber 411.
  • the second muffler cover 42 surrounds the air inlet 211.
  • the second muffler cover 42 is formed with a second muffler cavity 421 communicating with the air inlet 211.
  • the acoustic cover 42 is provided with a second conductive via 422 that communicates with the second muffling cavity 421;
  • the bladeless fan 1000 of the embodiment of the present invention includes a fan head 102 and a base 100 of any of the above embodiments.
  • the fan head 102 is disposed on the base 100 for injecting airflow established by the power system 20.
  • the cavity portion of the first muffling cavity 411 between the first muffling cover 41 and the second muffling cover 42 is communicated by the through hole 441 of the pipe wall of the connecting pipe 44. 4111, when the power system 20 is in operation, noise generated when air is taken in from the air inlet 121 enters the cavity portion 4111 through the through hole 441, and noise is reflected and consumed inside and outside the cavity portion 4111, thereby reducing the bladeless fan. 1000 working noise.

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Abstract

一种基座(100)及无叶风扇(1000)，基座(100)包括：壳体(10)，壳体(10)包括外壁(12)，外壁(12)形成有进气口(121)；设置在壳体(10)内的动力系统(20)，动力系统(20)形成有进风口(211)；和设置在壳体(10)内的消声结构(40)，消声结构(40)包括：第一消声罩(41)，第一消声罩(41)形成有第一消声腔(411)，第一消声罩(41)开设有连通进气口(121)的第一导通孔(412)；收容在第一消声腔(411)内的第二消声罩(42)，第二消声罩(42)包围覆盖进风口(211)，第二消声罩(42)形成有连通进风口(211)的第二消声腔(421)，第二消声罩(42)开设有连通第二消声腔(421)的第二导通孔(422)；和连接管(44)，连接管(44)连接第一消声罩(41)和第二消声罩(42)，并对应连通第一导通孔(412)和第二导通孔(422)，连接管(44)的管壁开设有穿孔(441)，穿孔(441)连通第一消声罩(41)与第二消声罩(42)之间的第一消声腔(411)的空腔部分(4111)。上述基座(100)能够降低无叶风扇(1000)工作时的噪声。

Description

基座及无叶风扇 技术领域
本发明涉及风扇领域，尤其涉及一种基座及无叶风扇。
背景技术
现有的无叶风扇包括基座。基座包括外壳和设置在外壳内的动力系统。外壳形成有进气口，工作时，动力系统通过进气口吸入空气并建立气流。然而动力系统工作时发出的噪声可以通过进气口向外扩散，导致无叶风扇的噪声较大。
发明内容
本发明旨在至少解决相关技术中存在的技术问题之一。为此，本发明实施方式提供一种基座及无叶风扇。
本发明实施方式的基座用于无叶风扇，所述基座包括：壳体，所述壳体包括外壁，所述外壁形成有进气口；设置在所述壳体内的动力系统，所述动力系统用于通过所述进气口吸入空气并建立气流，所述动力系统形成有进风口；和设置在所述壳体内的消声结构，所述消声结构包括：第一消声罩，所述第一消声罩形成有第一消声腔，所述第一消声罩开设有连通所述进气口的第一导通孔；收容在所述第一消声腔内的第二消声罩，所述第二消声罩包围覆盖所述进风口，所述第二消声罩形成有连通所述进风口的第二消声腔，所述第二消声罩开设有连通所述第二消声腔的第二导通孔；和连接管，所述连接管连接所述第一消声罩和所述第二消声罩，并对应连通所述第一导通孔和所述第二导通孔，所述连接管的管壁开设有穿孔，所述穿孔连通所述第一消声罩与所述第二消声罩之间的所述第一消声腔的空腔部分。
在某些实施方式中，所述第二导通孔的截面积小于所述第二消声腔的截面积。
在某些实施方式中，所述连接管的数量为多个，所述第一导通孔的数量和所述第二导通孔的数量与所述连接管的数量相同，所述多个连接管沿所述第一消声罩的周向间隔分布，所述多个连接管的分布位置与所述多个第一导通孔的分布位置和所述多个第二导通孔的分布位置对应。
在某些实施方式中，所述多个连接管沿所述第一消声罩的周向均匀间隔分布。
在某些实施方式中，所述连接管的内径为10-40mm，所述连接管的长度为5-15mm。
在某些实施方式中，所述穿孔的直径为1-4mm。
在某些实施方式中，所述穿孔的数量为多个，所述多个穿孔设置成多个穿孔阵列，所述多个穿孔阵列间隔。
在某些实施方式中，所述多个穿孔阵列沿所述连接管的管壁周向均匀间隔设置。
在某些实施方式中，所述第一消声罩及所述第二消声罩均呈圆柱形，所述第一消声罩与所述第二消声罩同轴设置。
在某些实施方式中，所述基座包括设置在所述第一消声罩和所述第二消声罩之间的吸音棉，所述吸音棉位于所述空腔部分中且覆盖所述穿孔。
在某些实施方式中，所述消声结构包括与所述第一消声罩及所述第二消声罩连接的安装板，所述消声结构通过所述安装板固定在所述壳体上。
在某些实施方式中，所述动力系统通过弹性件连接所述外壁并弹性悬挂在所述壳体内。
在某些实施方式中，所述壳体内固定有第一固定板和第二固定板，所述弹性件的数量为多个，所述多个弹性件构成第一弹性件组和第二弹性件组，所述第一弹性件组弹性连接所述动力系统的上端和所述第一固定板，所述第二弹性件组弹性连接所述动力系统的下端和所述第二固定板。
在某些实施方式中，所述第一弹性件组的多个所述弹性件沿所述动力系统的圆周方向均匀间隔设置；所述第二弹性件组的多个所述弹性件沿所述动力系统的圆周方向均匀间隔设置。
在某些实施方式中，所述第一弹性件组的多个所述弹性件在所述动力系统的圆周方向的位置分别与所述第二弹性件组的多个所述弹性件在所述动力系统在圆周方向的位置一一对应。
在某些实施方式中，所述第一消声罩的上端设置有凸环，所述第二消声罩的上端设置有环状的侧缘，所述侧缘的下表面开设有环状的凹槽，所述凸环紧密收容在所述凹槽中。
本发明实施方式的无叶风扇，包括扇头和上述任一实施方式的基座，所述扇头设置在所述基座上，所述扇头用于将所述动力系统建立的所述气流喷射出去。
在某些实施方式中，所述动力系统包括进气端及出气端，所述出气端较所述进气端更靠近所述扇头，所述进气端开设有所述进风口；所述无叶风扇包括呈环状的密封件，所述密封件密封连接所述扇头和所述出气端。
在某些实施方式中，所述密封件包括第一端及第二端，所述第一端密封连接所述出气端，所述第一端呈锥形扩张结构；所述第二端密封连接所述扇头，所述第二端的端面 开设有定位槽，所述定位槽卡进所述扇头。
在某些实施方式中，所述扇头开设有出风隙缝，所述出风隙缝呈弯曲状。
本发明实施方式的基座及无叶风扇中，由于连接管管壁的穿孔连通该第一消声罩与该第二消声罩之间的该第一消声腔的空腔部分，动力系统工作时，从进气口吸入空气时所产生的噪声会经穿孔进入空腔部分，噪声会在空腔部分内部来回被反射消耗掉，进而降低了无叶风扇工作时的噪声。
本发明的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本发明的实践了解到。
附图说明
本发明的上述和/或附加的方面和优点从结合下面附图对实施方式的描述中将变得明显和容易理解，其中：
图1是本发明实施方式的无叶风扇的立体示意图；
图2是本发明实施方式的基座的立体示意图；
图3是本发明实施方式的基座的截面立体示意图；
图4是本发明实施方式的基座的部分立体示意图；
图5是本发明实施方式的消声结构的立体示意图；
图6是本发明实施方式的消声结构的立体截面示意图；
图7是本发明实施方式的消声结构的平面示意图；
图8是本发明实施方式的消声结构的第一消声罩的立体截面示意图；
图9是本发明实施方式的消声结构的第二消声罩的立体截面示意图；
图10是本发明实施方式的基座的另一个截面示意图；
图11是本发明实施方式的无叶风扇的声压曲线示意图。
具体实施方式
下面详细描述本发明的实施方式，所述实施方式的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施方式是示例性的，仅用于解释本发明，而不能理解为对本发明的限制。
在本发明的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是 为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个所述特征。在本发明的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接或可以相互通讯；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
在本发明中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
下文的公开提供了许多不同的实施方式或例子用来实现本发明的不同结构。为了简化本发明的公开，下文中对特定例子的部件和设置进行描述。当然，它们仅仅为示例，并且目的不在于限制本发明。此外，本发明可以在不同例子中重复参考数字和/或参考字母，这种重复是为了简化和清楚的目的，其本身不指示所讨论各种实施方式和/或设置之间的关系。此外，本发明提供了的各种特定的工艺和材料的例子，但是本领域普通技术人员可以意识到其他工艺的应用和/或其他材料的使用。
请参阅图1，本发明实施方式的无叶风扇1000包括基座100和扇头102。扇头102设置在基座100上。无叶风扇1000在工作时，扇头102可以吹出风。相对于传统的风扇，无叶风扇1000由于没有外露的扇叶，不易于伤到用户的手指等部位，因此，无叶风扇1000具有安全的特点。另外，无叶风扇1000的体积较小，使得用户容易清洁无叶风扇1000。
请参阅图2及图3，基座100包括壳体10、动力系统20和消声结构40。动力系统20设置在壳体10内。消声结构40设置在壳体10内。
壳体10包括底板11及外壁12。底板11自外壁12向外延伸以使无叶风扇1000可 以稳定地支撑在支撑面上，支撑面例如为地面或桌面等平面。
外壁12呈环状，环状的外壁12使得无叶风扇1000更加美观，还可以增大外壁12的表面积以使进风面积较大。外壁12形成有进气口121，进气口121形成有阵列排布的多个进气孔1211。进气口121使得动力系统20能够吸入空气从而建立气流，从而使得无叶风扇1000可以形成风以满足用户的需求。
多个进气孔1211沿外壁12的圆周方向分布。这样使得进气口121的进风面积较大，有利于增加进入基座100内的空气流量。另外，还可以使得空气从壳体10的四周进入，以使进入基座100内的气流更加均匀，从而可以降低空气流动时的噪声。
为了使得外壁12具有足够的强度，以防止壳体10因摔落、撞击等意外而损坏，进气口121沿外壁12的圆周方向呈多个阵列排布，相邻的两个阵列间隔设置。如图2所示，相邻的两个进气口121阵列之间的外壁12为连续结构。另外，这样还有利于进气孔1211形成，从而提高壳体10的成品率。
具体地，进气口121靠近底板11设置，从而使得空气由下向上运动至动力系统20以缩短空气的路径及阻力，因此，进气口121靠近底板11设置可以降低空气流动产生的噪声。
每个进气孔1211呈圆形，进气孔1211的直径为1-3mm。例如进气孔1211的直径为2mm。这样可以在保证无叶风扇1000正常吸入空气的同时，可以降低气体流动时产生的噪声。
在同一个进气口121阵列中，相邻的两个进气孔1211之间的间隔为1-3mm。优选地，相邻的两个进气孔1211之间的间隔为2mm。由此可以降低空气流动时产生的噪声。
壳体10还包括自外壁12向内延伸的隔板14。隔板14形成有过孔141，过孔141与外壁12同轴设置。
请结合图3，动力系统20用于通过进气口121吸入空气并建立气流。动力系统20包括叶轮外壳21、叶轮22、电机23、扩压器24和电机外壳25。
叶轮外壳21架设在壳体10内，叶轮外壳21形成有与进气口121连通的进风口211。叶轮22设置在叶轮外壳21内。电机23用于驱动叶轮22。具体地，电机23位于叶轮外壳21内，电机23的输出轴与叶轮22固定连接，使得电机23工作时可以驱动叶轮22转动。
叶轮22旋转时，叶轮22周围可以产生负压，从而可以从进风口211吸入空气，空气经过叶轮22加压后，可以形成高压气流。
扩压器24设置于叶轮22产生的气流的下游，扩压器24与叶轮外壳21连接。扩压 器24可以对叶轮22所产生的高速气流进行增压、减速及消旋，引导高速气流向扇头102运动。
可以理解，扩压器24包括多个翼片241，多个翼片241可以对叶轮22产生的高速气流进行整合，并且可以实现消除旋风的效果，使得从扩压器24的出风口242排出的气流更加柔和。
电机外壳25形成在电机23外且用于固定电机23。电机外壳25与叶轮外壳21连接。电机外壳25可以避免电机23在工作过程中晃动。
具体地，电机外壳25与叶轮外壳21之间形成有气体通道25a，气体通道25a和扩压器24连通。叶轮22旋转时所产生的气流经过气体通道25a后流向扩压器24，经过扩压器24后流向扩压器24外以进入扇头102内。
请结合图3和图5-图9，消声结构40包括第一消声罩41、第二消声罩42和连接管44。
第一消声罩41形成有第一消声腔411，第一消声罩41开设有第一导通孔412。第一导通孔412连通进气口121。
第二消声罩42收容在第一消声腔411内，第二消声罩42包围覆盖进风口211，第二消声罩42形成有连通进风口211的第二消声腔421，第二消声罩42开设有连通第二消声腔421的第二导通孔422。
连接管44连接第一消声罩41和第二消声罩42，并对应连通第一导通孔412和第二导通孔422，连接管44的管壁开设有穿孔441，穿孔441连通第一消声罩41与第二消声罩42之间的第一消声腔411的空腔部分4111。
本发明实施方式的基座100中，由于连接管44管壁的穿孔441连通第一消声罩41与第二消声罩42之间的第一消声腔411的空腔部分4111，动力系统20工作时，从进气口121吸入空气时所产生的噪声会经穿孔441进入空腔部分4111，噪声会在空腔部分4111内部来回被反射消耗掉，进而降低了无叶风扇1000工作时的噪声。
具体地，第一消声罩41包括第一基板416和第一侧板417，第一侧板417设置在第一基板416上，例如，第一侧板417呈环状且连接在第一基板416的边缘。第二消声罩42包括第二基板426和第二侧板427，第二侧板427设置在第二基板426上，例如，第二侧板427呈环状且连接在第二基板426的边缘。
本发明实施方式中，第二基板426与第一基板416固定连接在一起，使得第一消声罩41与第二消声罩42固定，同时，使得第一消声罩41与第二消声罩42之间的第一消声腔411的空腔部分4111呈环形以形成使噪声循环反射的空腔，进一步降低了噪声。
在某些实施方式中，第一基板416与第二基板426可通过螺钉固定的方式进行固定。例如，第一基板416和第二基板426均开设有安装孔418，螺钉穿设安装孔418而将第一基板416和第二基板426固定在一起。同时，螺钉也可进一步与基座100的底板11连接，而将消声结构40固定在底板11上。
在某些实施方式中，连接管44连接第一消声罩41的内表面和第二消声罩42的外表面。如此，消声结构40易于制造，降低了无叶风扇1000的成本。
在某些实施方式中，第二导通孔422的截面积小于第二消声腔421的截面积。
如此，噪声难以从截面积较大的第二消声腔421向截面积较小的第二导通孔421传播，使得声音在第二消声腔421内来回反射消耗掉，降低了无叶风扇1000的噪声。
在某些实施方式中，连接管44的数量为多个，第一导通孔412的数量和第二导通孔422的数量与连接管44的数量相同，多个连接管44沿第一消声罩41的周向间隔分布，多个连接管44的分布位置与多个第一导通孔421的分布位置和多个第二导通孔422的分布位置对应。
如此，可使空气进入壳体10内时所产生的噪声能够更多地经穿孔441进入空腔部分4111内而进行反射消除，进一步降低了无叶风扇1000的噪声。
在本发明示例中，连接管44的数量、第一导通孔412的数量和第二导通孔422的数量均为6个。连接管44呈中空的圆柱状，第一导通孔412和第二导通孔422均呈圆形。多个连接管44的轴线X分布在同一水平面上而形成一个连接管层。可以理解，在其它例子中，多个连接管44的轴线X也可分布在不同的水平面上而形成二个或以上的连接管层。
需要指出的是，连接管44的数量还可为其它数量，较佳地，连接管44的数量范围为3-9，在保证一定进风量的同时，也具有较佳的隔声消声效果。例如，除上述例子外，连接管44的数量还可为1、2、4、5、8、12等数量。
在某些实施方式中，多个连接管44沿第一消声罩41的周向均匀间隔分布。如此，实现消声结构40在各个方向上的均匀消声能力，提高了用户体验。
具体地，本发明实施方式中，连接管44的数量、第一导通孔421的数量和第二导通孔422的数量均为6个。6个连接管44沿第一消声罩41的周向均匀间隔分布，也就是说，相邻两个连接管44的轴线X所形成的夹角为60度，同时，每个第一导通孔412和每个第二导通孔422与连接管44一一对应，如图6所示。
在某些实施方式中，连接管44的内径为10-40mm，连接管44的长度为5-15mm。如此，保证了进风量与隔声消声效果之间取得较佳的平衡。
具体地，在一个例子中，当连接管44呈中空的圆柱状时，连接管44的内径指的是连接管44内所形成的通道的直径。
在某些实施方式中，穿孔441的直径为1-4mm。如此，保证了进风量与隔声消声效果之间取得较佳的平衡。在一个例子中，穿孔441为圆形孔。
在某些实施方式中，穿孔441的数量为多个，多个穿孔441设置成多个穿孔阵列，多个穿孔阵列间隔。如此，在连接管44内的噪声能够从多个方向被导入至第一消声腔411的空腔部分，保证了隔声消声效果。
在某些实施方式中，多个穿孔阵列沿连接管44的管壁周向均匀间隔设置。如此，可保证在连接管44内的噪声能够从多个方向被均匀地导入第一消声腔411的空腔部分4111，保证了消声的均匀性。
具体地，每个穿孔阵列包括多个穿孔441，每个穿孔阵列的多个穿孔441沿连接管44的轴线X排列。这样连接管44的制造工艺较简单，降低了基座100的成本。
在某些实施方式中，第一消声罩41及第二消声罩42均呈圆柱形，第一消声罩41与第二消声罩42同轴设置。
如此，第一消声罩41和第二消声罩42易于制造，同轴设置使得消声结构40在各个方向上具有较均匀的消声效果。
在某些实施方式中，基座100包括设置在第一消声罩41和第二消声罩42之间的吸音棉(图未示)，吸音棉位于空腔部分4111中且覆盖穿孔441。
如此，从穿孔441进入第一消声腔411的空腔部分4111的噪声会被吸音棉吸收，进入空腔部分4111的噪声会被反复消耗掉，进一步提升了无叶风扇1000的降噪效果。具体地，由于吸音棉具有多个交错分布的孔隙，从而具有较好的吸音效果。较佳地，吸音棉的厚度在5-15mm。
在某些实施方式中，消声结构40包括与第一消声罩41及第二消声罩42连接的安装板43，消声结构40通过安装板43固定在壳体10上。
如此，通过安装板43来安装消声结构40，不会对第一消声罩41和第二消声罩42产生不利影响。
具体地，在本发明实施方式中，安装板43设置在第二消声罩42的上端且呈环状。在一个例子中，安装板43与第二消声罩42为一体成型结构，组装消声结构40时，将安装板43和第二消声罩42一起组装至第一消声罩41上，使第二消声罩42收容在第一消声腔411内，第一消声罩41与安装板43安装在一起，然后通过安装板43安装至壳体10上。
在本发明实施方式中，安装板43开设有多个螺孔43a，安装板43可以通过螺钉穿过螺孔43a固定在隔板14上。安装板43开设有过孔43b，过孔43b连通第二消声腔421。动力系统20穿过过孔43b而部分收容在第二消声腔421内，使得第二消声罩42包围覆盖进风口211。
在某些实施方式中，请结合图8和图9，第一消声罩41的上端设置有凸环419，第二消声罩42的上端设置有环状的侧缘428，侧缘428的下表面开设有环状的凹槽429，凸环419紧密收容在凹槽429中，如图3所示。
如此，能够使位于第一消声罩41和第二消声罩42之间的第一消声腔411的空腔部分4111形成相对密封的腔室，使空腔部分4111内的噪声不容易或无法向外部传播，进一步提升无叶风扇1000的降噪效果。
具体地，本发明示例中，侧缘428与安装板43在第二消声罩42的上端连接成一板体431，如此，可节省消声结构40的材料和降低制造难度。
请再次参阅图1，扇头102形成有风道和连通风道的出风隙缝1021，出风隙缝1021呈弯曲状。扇头102与基座100连通以将动力系统20产生的气流送入风道内并经出风隙缝1021向外喷射。出风隙缝1021形成喷嘴。
如此，呈弯曲状的出风隙缝1021可使无叶风扇的出风面积增大，提高了用户的体验。
进一步地，扇头102的风道内可设置有泡棉。由此，泡棉可以吸收风道中所产生的噪声，从而可以降低无叶风扇1000的噪声。扇头102向上延伸的部分呈曲线状，以使风道呈曲线状，由此可以减低空气流动时产生的噪声。
在某些实施方式中，动力系统20包括进气端28及出气端29，出气端29较进气端28更靠近扇头102，进气端28开设有进风口211。
无叶风扇1000包括呈环状的密封件80，密封件80密封连接扇头102和出气端29。如此，密封件80的设置可减少气流从扇头102倒灌在基座100的腔体内的机率，进而减少了风噪，提升了无叶风扇1000的出风效果。
具体地，为了使无叶风扇100的出风效果较佳，扇头102一般较基座100长，这使气流到风道的路径较长，阻力较大，风道呈曲线形状，会使路径更长，阻力更大。若缺少密封件80，由于风道的路径长阻力大，会容易使气流倒灌在基座100的腔体内，形成很大的风噪，而且出风效果差。密封件80的设置使得密封件80与动力系统20的出气端29和与扇头102均呈贴合密封状态，则可解决上述问题。
在一个例子中，密封件80可选用硅胶密封软管，其硬度在50-60范围，弹性适中可以伸缩。
在某些实施方式中，密封件80包括第一端81及第二端82，第一端81密封连接出气端29，第一端81呈锥形扩张结构。第二端82密封连接扇头102，第二端82的端面开设有定位槽821，定位槽821卡进扇头102。
如此，密封件80的结构有利于扇头102和密封件80安装在基座100上及提高了出气端29和扇头102的密封性。
具体地，在将密封件80和扇头102安装在基座100上时，先将第二端82的定位槽821直接卡进扇头102，在将带有密封件80的扇头102安装在基座100上时，带有密封件80的扇头102经基座100的开口端向下滑动使第一端81直接套进动力系统20的出气端29，以完成密封件80密封连接动力系统20的出气端29和扇头102。
在本发明实施方式中，定位槽821的数量为两个，第二端82呈圆形，两个定位槽821沿第二端82的径向方向间隔排列。
请再次参阅图3及图4，基座100和扇头102之间设有连接板50，连接板50连接基座100和扇头102。
进一步地，本发明实施方式中，连接板50连接外壁12的上边缘。
在连接板50上固定设置有第一固定板26，隔板14上固定设置有第二固定板27，第二固定板27与第一固定板26均位于壳体10内。弹性件70拉伸连接第一固定板26及动力系统20，及拉伸连接第二固定板27及动力系统20。也就是说，动力系统20通过弹性件70连接外壁12并弹性悬挂在壳体10内。
如此，弹性件70使得动力系统20可以悬挂起来，动力系统20产生的振动不会直接传递到壳体10上，从而可以减少基座100产生的噪声。
在本发明实施方式中，第二固定板27的上表面设置有第一固定部271，动力系统20的下端设置有第二固定部272，第一固定部271开设有第一卡孔，第二固定部272开设有第二卡孔，弹性件70的一端可勾住第一卡孔，弹性件70的另一端可勾住第二卡孔，而将动力系统20弹性悬挂在壳体10内。较佳地，第一卡孔和第二卡孔均形有倒角结构，使得弹性件70的安装更便捷。第一固定板26的下表面和动力系统20的上端设置有与上述固定部的类似结构。
需要指出的是，在其它实施方式中，弹性件70的安装可采用其它手段。
在某些实施方式中，第一固定板26可直接固定在外壁12的内表面上，第二固定板27可直接固定在外壁12的内表面上。第一固定板26和第二固定板27间隔。
在一个例子中，弹性件70为拉伸弹簧。较佳地，拉伸弹簧70的劲度系数在2-4N/mm，原长度的范围为15-25mm。例如，拉伸弹簧70的劲度系数为3N/mm，原长度为20mm。
在某些实施方式中，弹性件70的数量为多个，多个弹性件70包括第一弹性件组和第二弹性件组，第一弹性件组连接第一固定板26及动力系统20的上端。较佳地，第一弹性件组的多个弹性件70沿动力系统20的圆周方向均匀间隔设置。在本发明示例中，第一弹性件组的弹性件70数量为3个，相邻两个弹性件70之间的角度为120度。
第二弹性件组连接第二固定板27及动力系统20的下端。较佳地，第二弹性件组的多个弹性件70沿动力系统20的圆周方向均匀间隔设置。在本发明示例中，第二弹性件组的弹性件70数量为3个，相邻两个弹性件70之间的角度为120度。
在本发明示例中，动力系统20的上端设置有出气端29，动力系统20的下端设置有进气端28。
在某些实施方式中，第一弹性件组的多个弹性件70在动力系统20的圆周方向的位置分别与第二弹性件组的多个弹性件70在动力系统20在圆周方向的位置一一对应。
如此，弹性件70可提供均匀的支撑力，避免第一弹性件组的弹性件70与第二弹性件组的弹性件70错位而使动力系统20在工作时产生过多的晃动。
如图3的虚线箭头所示，无叶风扇1000工作时，电机23驱动叶轮22转动，空气依次经过进气口121、消声结构40及进风口211而被叶轮22吸入，叶轮22将空气加速加压后形成高速气流，高速气流依次经过气体通道25a及扩压器24后进入扇头102的风道中，最后从出风隙缝1021喷出，从而出风隙缝1021喷出的高速气流可以卷吸周围的空气，从而形成风，以实现为用户降温纳凉的效果。
如图10的虚线AA所示，空气经进气口121进入消声结构40时，先经第一消声罩41的第一导通孔412进入连接管44，经连接管44和第二导通孔422进入第二消声腔421，之后再经进风口211进入动力系统20。空气在经过连接管44时，噪声会从穿孔441进入空腔部分4111内而被反射消除，和被吸音棉吸收。
同时空气从第一消声罩41进入第二消声罩42的时候，属于从小截面流入大截面的过程，在管道声学理论中，气流在从小截面到大截面的过程中，声音会衰减变小。本发明实施方式的消声结构40形成阻抗复合穿孔管式消声器，在气流经过的时候就会形成这样的一个过程，声音会衰减变小，起到降噪的作用，声音很难反向从第二消声罩42通过连接管44传出去，声音来回被反射被消耗，噪音的能量被隔断和衰减。
另外，在无叶风扇1000启动时，电机23的转速逐渐增加，在无叶风扇1000停止运行时，电机23的转速逐渐降低，由此可以使得无叶风扇1000缓慢启动及停止运行，从而可以降低无叶风扇1000的振动，以减少噪声的产生。
如图7所示，曲线a为无叶风扇1000省略消声结构40时的声压级曲线，曲线b为 无叶风扇1000内设置有消声结构40时的声压级曲线。其中，纵坐标SPL表示无叶风扇1000所产生的声音的声压级，横坐标f表示无叶风扇1000所产生的声音的频率。由图7可以看出，当在壳体10内设置有消声结构40时，无叶风扇1000所产生的声音的声压级下降。
综上，本发明实施方式的基座100包括：
壳体10，壳体10包括外壁12，外壁12形成有进气口121；
设置在壳体10内的动力系统20，动力系统20用于通过进气口121吸入空气并建立气流，动力系统20形成有进风口211；和
设置在壳体10内的消声结构40，消声结构40包括：
第一消声罩41，第一消声罩41形成有第一消声腔411，第一消声罩411开设有连通进气口121的第一导通孔412；
收容在第一消声腔411内的第二消声罩42，第二消声罩42包围覆盖进风口211，第二消声罩42形成有连通进风口211的第二消声腔421，第二消声罩42开设有连通第二消声腔421的第二导通孔422；和
连接管44，连接管44连接第一消声罩41和第二消声罩42，并对应连通第一导通孔412和第二导通孔422，连接管44的管壁开设有穿孔441，穿孔441连通第一消声罩41与第二消声罩42之间的第一消声腔411的空腔部分4111。
本发明实施方式的无叶风扇1000，包括扇头102和上述任一实施方式的基座100，扇头102设置在基座100上，扇头102用于将动力系统20建立的气流喷射出去。
本发明实施方式的基座100和无叶风扇1000中，由于连接管44管壁的穿孔441连通第一消声罩41与第二消声罩42之间的第一消声腔411的空腔部分4111，动力系统20工作时，从进气口121吸入空气时所产生的噪声会经穿孔441进入空腔部分4111，噪声会在空腔部分4111内部来回被反射消耗掉，进而降低了无叶风扇1000工作时的噪声。
在本说明书的描述中，参考术语“一个实施方式”、“某些实施方式”、“示意性实施方式”、“示例”、“具体示例”、或“一些示例”等的描述意指结合所述实施方式或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施方式或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施方式或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施方式或示例中以合适的方式结合。
尽管已经示出和描述了本发明的实施方式，本领域的普通技术人员可以理解：在不 脱离本发明的原理和宗旨的情况下可以对这些实施方式进行多种变化、修改、替换和变型，本发明的范围由权利要求及其等同物限定。

Claims (20)

  1. 一种基座，用于无叶风扇，其特征在于，所述基座包括：
    壳体，所述壳体包括外壁，所述外壁形成有进气口；
    设置在所述壳体内的动力系统，所述动力系统用于通过所述进气口吸入空气并建立气流，所述动力系统形成有进风口；和
    设置在所述壳体内的消声结构，所述消声结构包括：
    第一消声罩，所述第一消声罩形成有第一消声腔，所述第一消声罩开设有连通所述进气口的第一导通孔；
    收容在所述第一消声腔内的第二消声罩，所述第二消声罩包围覆盖所述进风口，所述第二消声罩形成有连通所述进风口的第二消声腔，所述第二消声罩开设有连通所述第二消声腔的第二导通孔；和
    连接管，所述连接管连接所述第一消声罩和所述第二消声罩，并对应连通所述第一导通孔和所述第二导通孔，所述连接管的管壁开设有穿孔，所述穿孔连通所述第一消声罩与所述第二消声罩之间的所述第一消声腔的空腔部分。
  2. 根据权利要求1所述的基座，其特征在于，所述第二导通孔的截面积小于所述第二消声腔的截面积。
  3. 根据权利要求1所述的基座，其特征在于，所述连接管的数量为多个，所述第一导通孔的数量和所述第二导通孔的数量与所述连接管的数量相同，所述多个连接管沿所述第一消声罩的周向间隔分布，所述多个连接管的分布位置与所述多个第一导通孔的分布位置和所述多个第二导通孔的分布位置对应。
  4. 根据权利要求3所述的基座，其特征在于，所述多个连接管沿所述第一消声罩的周向均匀间隔分布。
  5. 根据权利要求1所述的基座，其特征在于，所述连接管的内径为10-40mm，所述连接管的长度为5-15mm。
  6. 根据权利要求1所述的基座，其特征在于，所述穿孔的直径为1-4mm。
  7. 根据权利要求1所述的基座，其特征在于，所述穿孔的数量为多个，所述多个穿孔设置成多个穿孔阵列，所述多个穿孔阵列间隔。
  8. 根据权利要求7所述的基座，其特征在于，所述多个穿孔阵列沿所述连接管的管壁周向均匀间隔设置。
  9. 根据权利要求1所述的基座，其特征在于，所述第一消声罩及所述第二消声罩均呈圆柱形，所述第一消声罩与所述第二消声罩同轴设置。
  10. 根据权利要求1所述的基座，其特征在于，所述基座包括设置在所述第一消声罩和所述第二消声罩之间的吸音棉，所述吸音棉位于所述空腔部分中且覆盖所述穿孔。
  11. 根据权利要求1所述的基座，其特征在于，所述消声结构包括与所述第一消声罩及所述第二消声罩连接的安装板，所述消声结构通过所述安装板固定在所述壳体上。
  12. 根据权利要求1所述的基座，其特征在于，所述动力系统通过弹性件连接所述外壁并弹性悬挂在所述壳体内。
  13. 根据权利要求12所述的基座，其特征在于，所述壳体内固定有第一固定板和第二固定板，所述弹性件的数量为多个，所述多个弹性件构成第一弹性件组和第二弹性件组，所述第一弹性件组弹性连接所述动力系统的上端和所述第一固定板，所述第二弹性件组弹性连接所述动力系统的下端和所述第二固定板。
  14. 根据权利要求13所述的基座，其特征在于，所述第一弹性件组的多个所述弹性件沿所述动力系统的圆周方向均匀间隔设置；
    所述第二弹性件组的多个所述弹性件沿所述动力系统的圆周方向均匀间隔设置。
  15. 根据权利要求14所述的基座，其特征在于，所述第一弹性件组的多个所述弹性件在所述动力系统的圆周方向的位置分别与所述第二弹性件组的多个所述弹性件在所述动力系统在圆周方向的位置一一对应。
  16. 根据权利要求1所述的基座，其特征在于，所述第一消声罩的上端设置有凸环，所述第二消声罩的上端设置有环状的侧缘，所述侧缘的下表面开设有环状的凹槽，所述凸环紧密收容在所述凹槽中。
  17. 一种无叶风扇，其特征在于，包括扇头和权利要求1-16任意一项所述的基座，所述扇头设置在所述基座上，所述扇头用于将所述动力系统建立的所述气流喷射出去。
  18. 根据权利要求17所述的无叶风扇，其特征在于，所述动力系统包括进气端及出气端，所述出气端较所述进气端更靠近所述扇头，所述进气端开设有所述进风口；
    所述无叶风扇包括呈环状的密封件，所述密封件密封连接所述扇头和所述出气端。
  19. 根据权利要求18所述的无叶风扇，其特征在于，所述密封件包括第一端及第二端，所述第一端密封连接所述出气端，所述第一端呈锥形扩张结构；
    所述第二端密封连接所述扇头，所述第二端的端面开设有定位槽，所述定位槽卡进所述扇头。
  20. 根据权利要求17所述的无叶风扇，其特征在于，所述扇头开设有出风隙缝，所述出风隙缝呈弯曲状。
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