CN206290465U - Fan head and bladeless fan - Google Patents

Abstract

The utility model discloses one kind fan head and bladeless fan, the fan head includes outlet section and inlet section, the outlet section includes two air-out sub-portions, each described air-out sub-portion offers exhaust passage and air channel, the exhaust passage connects the air channel and forms air outlet in the side of the air-out sub-portion, the direction of two air outlets is identical, described two air-out sub-portion intervals are relatively connected on the inlet section, the inlet section offers air inlet duct, two air channels are connected to one end both sides of the air inlet duct of the air inlet away from the air inlet duct, the first sound-absorbing element is provided with the air inlet duct inwall relative with the air inlet.In the fan head of the utility model implementation method, due to being provided with sound-absorbing element on the inwall of the air inlet duct relative with air inlet, gas shock air inlet duct inwall so can be reduced and produce the noise of reverberation and impact to be vortexed noise, realize the demand of fan head safety and low noise.

Description

Fan head and bladeless fan

Technical field

The utility model is related to living electric apparatus field, more particularly, to one kind fan head and bladeless fan.

Background technology

Existing bladeless fan includes fan head.Fan head offers air channel and air outlet.When bladeless fan works, air-flow holds The larger aerodynamic noise of the easy inwall in air channel, so as to influence Consumer's Experience.

Utility model content

The utility model is intended at least solve one of technical problem present in prior art.Therefore, the utility model is needed A kind of fan head and bladeless fan are provided.

A kind of fan head of the utility model implementation method, for bladeless fan, the fan head includes outlet section and inlet section, The outlet section includes two air-out sub-portions, and each described air-out sub-portion offers exhaust passage and air channel, the exhaust passage connection The air channel simultaneously forms air outlet in the side of the air-out sub-portion, and the direction of two air outlets is identical, it is described two go out Wind sub-portion interval is relatively connected on the inlet section, and the inlet section offers air inlet duct, and two air channels connect respectively It is connected on one end both sides of the air inlet duct of air inlet away from the air inlet duct, the air inlet duct relative with the air inlet The first sound-absorbing element is provided with inwall.

In the fan head of the utility model implementation method, due to being provided with suction on the inwall of the air inlet duct relative with air inlet Tone part, so can reduce gas shock air inlet duct inwall and produce the noise of reverberation and impact to be vortexed noise, realize fan head peace The demand of complete and low noise.

In one embodiment, the air-out sub-portion includes the baffle plate away from the inlet section, and the baffle plate is described The end stop in air channel, the second sound-absorbing element is provided with the inner surface of the baffle plate for limiting the air channel.

In one embodiment, the inner surface of the exhaust passage is formed with and causes the exhaust passage in variable section structure Sound proof part.

In one embodiment, the sound proof part offers the sound insulation chamber of closing.

In one embodiment, dividing plate is provided with the air channel at the air outlet, the dividing plate is described in The side inwall in air channel extends to the relative opposite side inwall direction in the air channel, and the dividing plate bends to the air outlet direction Extend and be connected to form the sound insulation chamber with the side inwall in the air channel；

Dividing plate opposite side inwall relative with the air channel separates to form the exhaust passage.

In one embodiment, the width of the exhaust passage first diminishes along the air channel to the direction outside the air channel Become afterwards big.

In one embodiment, the width of the air outlet is more than or waits with the ratio of the minimum widith of the exhaust passage In 6.

In one embodiment, the inwall in the air channel forms the oriented inclined wind-guiding face in exhaust passage direction.

In one embodiment, the inlet section includes the connection outer barrel being coaxially disposed and connection inner cylinder, the connection Inner cylinder offers the air inlet duct, and the fan head includes seal, and the seal includes upper end and lower end, the upper end sealing Connect the connection inner cylinder, the tapered expansion structure in lower end.

The bladeless fan of the utility model implementation method includes the fan head as described in above-mentioned any embodiment.

In the bladeless fan of the utility model implementation method, due to being set on the inwall of the air inlet duct relative with air inlet There is sound-absorbing element, so can reduce gas shock air inlet duct inwall and produce the noise of reverberation and impact to be vortexed noise, realize fan The demand of head safety and low noise.

The additional aspect and advantage of the utility model implementation method will be set forth in part in the description, partly will be under Become obvious in the description in face, or recognized by practice of the present utility model.

Brief description of the drawings

Of the present utility model above-mentioned and/or additional aspect and advantage are from description of the accompanying drawings below to implementation method is combined Will be apparent and be readily appreciated that, wherein：

Fig. 1 is the schematic perspective view of the fan head of the utility model implementation method.

Fig. 2 is the generalized section of the fan head of the utility model implementation method.

Fig. 3 is the enlarged diagram of first II part of fan of Fig. 2.

Fig. 4 is another generalized section of the fan head of the utility model implementation method.

Fig. 5 is the enlarged diagram of first IV part of fan of Fig. 4.

Fig. 6 is another schematic perspective view of the fan head of the utility model implementation method.

Fig. 7 is the another generalized section of the fan head of the utility model implementation method.

Fig. 8 is the another schematic perspective view of the fan head of the utility model implementation method.

Fig. 9 is another generalized section of the fan head of the utility model implementation method.

Figure 10 is another schematic perspective view of the fan head of the utility model implementation method.

Figure 11 is another generalized section again of the fan head of the utility model implementation method.

Figure 12 is the decomposing schematic representation of the fan head of the utility model implementation method.

Figure 13 is the schematic perspective view of the seal of the fan head of the utility model implementation method.

Figure 14 is the schematic perspective view of the bladeless fan of the utility model implementation method.

Figure 15 is the schematic perspective view of the pedestal of the bladeless fan of the utility model implementation method.

Figure 16 is the generalized section of the pedestal of the bladeless fan of the utility model implementation method.

Specific embodiment

Implementation method of the present utility model is described below in detail, the example of the implementation method is shown in the drawings, wherein Same or similar label represents same or similar element or the element with same or like function from start to finish.Lead to below It is exemplary to cross the implementation method being described with reference to the drawings, and is only used for explaining the utility model, and it is not intended that to this practicality New limitation.

In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width Degree ", " thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outward ", The orientation or position relationship of the instructions such as " clockwise ", " counterclockwise " be based on orientation shown in the drawings or position relationship, be only for Be easy to description the utility model and simplify describe, rather than indicate imply signified device or element must have it is specific Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.Additionally, term " first ", " second " is only used for describing purpose, and it is not intended that indicating or implying relative importance or imply to indicate indicated technology The quantity of feature.Thus, " first " is defined, the feature of " second " can be expressed or implicitly include one or more The feature.In description of the present utility model, " multiple " is meant that two or more, unless otherwise clearly specific Limit.

, it is necessary to explanation, unless otherwise clearly defined and limited, term " is pacified in description of the present utility model Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integratedly Connection.Can mechanically connect, or electrically connect.Can be joined directly together, it is also possible to be indirectly connected to by intermediary, Can be two element internals connection or two interaction relationships of element.For one of ordinary skill in the art Speech, can as the case may be understand concrete meaning of the above-mentioned term in the utility model.

Also referring to Fig. 1~Fig. 7, the fan first 10 of the utility model implementation method can be used for bladeless fan.First 10 bag of fan Outlet section 12 and inlet section 14 are included, outlet section 12 includes two air-out sub-portions 125, and each air-out sub-portion 125 offers exhaust passage 122 and air channel 121, the connection air channel 121 of exhaust passage 122 simultaneously forms air outlet 123, two air-out in the side of air-out sub-portion 125 The direction of mouth 123 is identical, and two air-out sub-portions 125 are spaced and be relatively connected on inlet section 14, and inlet section 14 offers air intake Road 144, two air channels 121 are connected to one end both sides of the air inlet duct 144 of the air inlet 141 away from air inlet duct 144, and enter The first sound-absorbing element (not shown) is provided with the relative inwall 145 of air inlet duct 144 in air port 141.

In the fan of the utility model implementation method first 10, due to the inwall 145 of the air inlet duct 144 relative with air inlet 141 On be provided with sound-absorbing element, can so reduce the inwall 145 of gas shock air inlet duct 144 and produce reverberation noise and impact be vortexed Noise, realizes the demand of first 10 safety of fan and low noise.

Specifically, inlet section 14 is attached on the pedestal of bladeless fan, and high pressure draught is provided by pedestal, and high pressure gas are flowed into Enter air inlet duct 144 and air channel 121, outwards injection forms wind by air outlet 123 through exhaust passage 122.

Two air channels 121 are connected to one end both sides of air inlet duct 144 so that two air channels 121 are used as air inlet duct 144 Shunt duct, in this way, fan first 10 air-out area it is larger, improve the comfort level of user.

In addition, air inlet duct 144 inwall 145 relative with air inlet 141 is in the convex surface protruded near the direction of air inlet 141 Shape, the first sound-absorbing element can be attached according to convex-shaped so that the first sound-absorbing element is also in convex-shaped, in this way, being conducive to air-flow Swimmingly enter two air channels 121, further reduce noise.

First sound-absorbing element is, for example, the element that acoustical cotton etc. is made up of fluff material.Because acoustical cotton interlocks with multiple The hole of distribution, so that there is preferable sound-absorbing effect, so as to further increase the anti-acoustic capability of fan first 10.

In one embodiment, air-out sub-portion 125 includes the baffle plate 126 away from inlet section 14, and baffle plate 126 is air channel 121 end stop, the second sound-absorbing element is provided with the inner surface 127 of the baffle plate 126 for limiting air channel 121.

In this way, when inner surface 127 of the gas shock in air channel 121 to baffle plate 126, the second sound-absorbing element can be further Reduce the noise and impact vortex noise of reverberation, realize the demand of first 10 safety of fan and low noise.Meanwhile, the setting of baffle plate 126 Can prevent the air-flow of two air channels 121 end from bumping against and producing noise.

Specifically, the second sound-absorbing element is, for example, the element that acoustical cotton etc. is made up of fluff material.Because acoustical cotton has The hole that multiple is interspersed, so that there is preferable sound-absorbing effect, so as to further increase the anti-acoustic capability of fan head.

In one embodiment, Fig. 6 and Fig. 7 is referred to, the one end open of each air-out sub-portion 125 forms openend 215, the other end is closed to form blind end 216.Openend 215 offers the ventilating opening 217 connected with air channel 121.Two openings End 215 is connected by inlet section 14.Inlet section 14 offers air inlet 141, each ventilating opening 217 connection air inlet 141, two The interval of blind end 216 is oppositely arranged.

In this way, baffle plate 126 can form blind end 216, the inner surface of blind end 216 is the inner surface 127 of baffle plate 126.

In one embodiment, Fig. 8 and Fig. 9 is referred to, the one end open of each air-out sub-portion 125 forms openend 315, the other end is closed to form blind end 316.Openend 315 offers the ventilating opening 317 connected with air channel 121, two openings End 315 is connected by inlet section 14, and intake section 14 offers air inlet 141, each ventilating opening 317 connection air inlet 141, two Blind end 316 is connected by connecting portion 16.

In this way, baffle plate 126 can form blind end 316, the inner surface of blind end 316 is the inner surface 127 of baffle plate 126, and Connecting portion 16 connects two outlet sections 12 so that fan first 10 is easily mounted onto in bladeless fan and ensures the intensity of fan first 10.

Specifically, connecting portion 16 can be solid construction or hollow-core construction, because connecting portion 16 connects blind end 316 so that No matter connecting portion 16 is solid construction or hollow-core construction, the wind in air channel 121 will not also enter in connecting portion 16, it is to avoid made an uproar The generation of sound.

In one embodiment, Figure 10 and Figure 11 is referred to, the both ends open of each air-out sub-portion 125 forms respectively One openend 415 and the second openend 416.First openend 415 offers the ventilating opening 417 connected with air channel 121.Two One openend 415 is connected by inlet section 14.Intake section 14 offers air inlet 141, each ventilating opening 417 connection air inlet 141, two the second openends 415 are connected by connecting portion 16.Connecting portion 16 is enclosed construction.

In this way, two ends for connecting two connecting portions 16 of the second openend 416 respectively can form baffle plate 126, connect The terminal interior surface in portion 16 is the inner surface 127 of baffle plate 126, and connecting portion 16 connects two outlet sections 12 so that fan first 10 is easy In be installed in bladeless fan and ensure fan first 10 intensity.

Specifically, connecting portion 16 can be solid construction or hollow-core construction, and solid construction can make the easy to manufacture of connecting portion 16, empty Core structure can mitigate the weight of fan first 10.When connecting portion 16 is solid construction, connecting portion 16 is not connected with air channel 121, air channel Wind in 121 will not enter in connecting portion 16.When connecting portion 16 be hollow-core construction when, the surface-closed of connecting portion 16 and form envelope Structure is closed, the wind in air channel 121 will not be entered into connecting portion 16.Wind in two such air-out sub-portion 125 will not be in fan head Converge and produce noise in 10 top.

In the example depicted in fig. 11, connecting portion 16 is solid construction.

In one embodiment, connecting portion 16 is the connecting portion of bending.So so that be not easily broken during fan head stress.

Specifically, connecting portion 16 can make connecting portion in the arc-shaped.Connecting portion 16 and the tangent connection in outlet section 12 so that First 10 appearance looks elegant of fan, improves user experience.

In one embodiment, incorporated by reference to Fig. 7 and Figure 12, inlet section 14 include the connection outer barrel 142 that is coaxially disposed and Connection inner cylinder 143.Connection inner cylinder 143 offers air inlet duct 144.Fan first 10 includes seal 11.Seal 11 includes upper end 111 And lower end 112.Upper end 111 is tightly connected connection inner cylinder 143.The tapered expansion structure in lower end 112.

In this way, lower end 112 can be used to be tightly connected the outlet side of the dynamical system 21 being connected with fan first 10, and it is tapered The lower end 112 of expansion structure is conducive to lower end 112 to pack into dynamical system 21 when that will fan first 10 on corresponding pedestal Outlet side, and it is even closer that fan first 10 is fitted with pedestal, the setting of such seal 11 can reduce air-flow and be fallen from fan first 10 Fill into the probability in the cavity of the pedestal being connected with fan first 10, and then reduce wind and make an uproar, improve the air-out effect of fan first 10.

Specifically, in order that the air-out effect of the bladeless fan with fan first 10 is preferable, fan first 10 is general long compared with pedestal, this Make gas flow to air channel 121 path it is more long, resistance is larger.If lacking seal 11, because the path length resistance in air channel 121 is big, Reverse flowing of air flows can easily be made in the cavity of pedestal, very big wind is formed and made an uproar, and air-out effect is poor.The setting of seal 11 makes Seal 11 is obtained with the outlet side of dynamical system 21 and with fan first 10 in gluing, sealing state, then can be solved the above problems.

In order that obtain seal 11 connects even closer with inner cylinder 143 is connected, the end face of upper end 111 offers locating slot 113, connection inner cylinder 143 is formed with card division (not shown), and card division can be snapped in locating slot 113.

In one example, seal 11 can select silica gel sealing flexible pipe, and, in 50-60 scopes, elasticity is moderate can for its hardness With flexible.

In one embodiment, incorporated by reference to Fig. 2, the inner surface of exhaust passage 122 is formed with so that exhaust passage 122 is cut in change The sound proof part 124 of face structure.

In this way, due to being formed with sound proof part 124 in the inner side of exhaust passage 122.When the bladeless fan work including fan first 10 When, air-flow can reflect air -return duct 121 by the aerodynamic noise that exhaust passage 122 sprays and formed from air channel 121 by sound proof part 124 It is interior, while path when making air-flow by exhaust passage 122 in the exhaust passage 122 of variable section structure is elongated so that noise it is more difficult from Exhaust passage 122 to fan first 10 outside transmit, therefore, the aerodynamic noise at air outlet so can be effectively reduced, so as to improve nothing The Consumer's Experience of blade fan.

In one embodiment, sound proof part 124 offers the sound insulation chamber 1241 of closing.

In this way, sound insulation chamber 1241 can strengthen sound proof part 124 reflects and absorbs the intensity of sound, so as to improve sound proof part 124 soundproof effect.

In the utility model implementation method, the sound insulation chamber 1241 of closing refers to, the inside in sound insulation chamber 1241 and air channel 121 and Exhaust passage 122 does not connect, can so avoid because sound insulation chamber 1241 is leaked out and caused by noise.

In one embodiment, it is provided with dividing plate 1211 at air outlet 123 in air channel 121.Dividing plate 1211 is from wind The side inwall in road 121 extends to the relative opposite side inwall direction in air channel 121.Dividing plate 1211 bends to the direction of air outlet 123 Extend and be connected to form sound insulation chamber 1241 with the side inwall in air channel 121.Dividing plate 1211 with the relative opposite side in air channel 121 Wall separates to form exhaust passage 122.

In this way, sound insulation chamber 1241 is to be surrounded by the inwall of dividing plate 1211 and air channel 121 so that the manufacture in sound insulation chamber 1241 compared with For simple, and cause that the structure of outlet section 12 is compact.

In one embodiment, air outlet 123 is formed in the one side of outlet section 12.

In this way, fan first 10 is unilateral air outlet, such air-out is more concentrated, better user experience.

In one embodiment, after the width of exhaust passage 122 to the direction outside air channel 121 in air channel 121 along first diminishing Become big.

In this way, can first become big into the flow velocity of the air-flow of exhaust passage 122 by air channel 121 then subtracting to a certain extent again It is small, and the trend of gradually diffusion can be formed at air outlet 123, so that the air-out that can further reduce at air outlet 123 is made an uproar Sound.

In one embodiment, Fig. 3, the width d1 of air outlet 123 and the minimum widith d2 of exhaust passage 122 are referred to Ratio is more than or equal to 6.In this way, the width d1 of air outlet 123 is moderate with the ratio of the minimum widith d2 of exhaust passage 122, so that The flow velocity of the air-flow blown out by air outlet 123 is not interfered with, and causes that the noise at air outlet 123 is smaller.

In one embodiment, it is provided with a muscle 1231 in air outlet 123 and is partitioned into multiple air ports with by air outlet 123 1232。

In this way, a muscle 1231 can ensure the uniformity of the gap width at air outlet 123, so that air outlet 123 Air-out it is more uniform.And ensure to control air channel spout gap and intensity

In one embodiment, incorporated by reference to Fig. 4, the inwall in air channel 121 forms that the direction of oriented exhaust passage 122 is inclined to lead Wind face 1213.

In this way, after air-flow enters air channel 121 by air inlet 141, air-flow can accelerate stream in the presence of wind-guiding face 1213 Exhaust passage 122 is moved and entered, the speed of air-flow can be so improved, to strengthen air-out effect.

In order to avoid the pneumatic noise at the cut-off of wind-guiding face 1213, can be formed and wind-guiding in the inwall in air channel 121 The transition cambered surface 1213a of the connection of face 1213, to reduce the flow resistance of air-flow.Transition cambered surface 1213a can connect the interior of baffle plate 126 Surface 127.

Also referring to Figure 14~Figure 16, the bladeless fan 100 of the utility model implementation method includes as above any implementation The fan first 10 of mode.

In the bladeless fan 100 of the utility model implementation method, due to the air inlet duct 144 relative with air inlet 141 Sound-absorbing element is provided with inwall 145, can so reduce the inwall 145 of gas shock air inlet duct 144 and produce reverberation noise and Impact vortex noise, realizes the demand of first 10 safety of fan and low noise.

Specifically, bladeless fan 100 includes dynamical system 21 and pedestal 20.Dynamical system 21 is housed in pedestal 20, fan First 10 are arranged on pedestal 20.

In this way, being easy to the placement of bladeless fan 100, the practicality and stability of bladeless fan 100 are improve.

Air inlet for convenience, pedestal 20 includes housing 22, and housing 22 includes wall 221, air inlet 222 is offered on wall 221, Dynamical system 21 sucks air to set up high pressure draught by air inlet 222.

It is appreciated that in order that wall 221 incoming air area it is larger and cause air inlet it is more uniform, wall 221 can be set Circlewise, and cause that air inlet 222 forms the air admission hole 223 that is arranged in array.Air admission hole 223 is in along the circumferencial direction of wall 221 Multiple array arrangements, two adjacent array spacings are set.

In the utility model example, dynamical system 21 includes impeller housing 211, impeller 212, motor 213, diffuser 215 and motor housing 216.Impeller housing 211 can be for example erected in housing 10 by damper element (such as rubber sleeve).Impeller outer Shell 211 is formed with the air inlet 214 connected with air inlet 221.Impeller 212 is arranged in impeller housing 211.Motor 213 is used for Drive impeller 212.Diffuser 215 is arranged at the downstream of the air-flow of the generation of impeller 212, and diffuser 215 connects with impeller housing 211 Connect.

Motor housing 216 is used to fix motor 213.Motor housing 216 can avoid motor 213 from shaking in the course of the work It is dynamic.Motor housing 216 and impeller housing 211 are connected and are formed with gas passage between motor housing 216 and impeller housing 211 216a, gas passage 216a is connected with diffuser 215.

As shown in the curve arrow of Figure 16, bladeless fan 100 work when, motor 213 drive impeller 212 rotate, air according to Secondary to be sucked by impeller 212 by air inlet 221 and air inlet 214, impeller 212 forms high pressure gas after air is accelerated into pressurization Stream, high pressure draught via after sequentially passing through gas passage 216a and diffuser 215 enter fan first 10 air channel 121 in, finally from Air outlet 123 sprays, so that the high pressure draught that air outlet 123 sprays can roll up the air around inhaling, so that wind is formed, and to realize It is the effect of user's cooling.

In addition, when bladeless fan 100 starts, the rotating speed of motor 213 gradually increases, out of service in bladeless fan 100 When, the rotating speed of motor 213 is gradually reduced, it is possible thereby to so that bladeless fan 100 slowly start and it is out of service, such that it is able to drop The vibration of low bladeless fan 100, to reduce the generation of noise.

In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or it D score can include the first and second feature directly contacts, it is also possible to including the first and second features not be directly contact but logical The other characterisation contact crossed between them.And, fisrt feature second feature " on ", " top " and " above " include the One feature is directly over second feature and oblique upper, or is merely representative of fisrt feature level height higher than second feature.First is special Levy second feature " under ", " lower section " and " below " include fisrt feature immediately below second feature and obliquely downward, or only Represent that fisrt feature level height is less than second feature.

Following disclosure provides many different implementation methods or example is used for realizing different structure of the present utility model. In order to simplify disclosure of the present utility model, hereinafter the part and setting to specific examples are described.Certainly, they are only Example, and purpose does not lie in limitation the utility model.Additionally, the utility model can in different examples repeat reference numerals And/or reference letter, this repetition is for purposes of simplicity and clarity, discussed various implementation methods itself not to be indicated And/or the relation between setting.Additionally, the example of the various specific technique that provides of the utility model and material, but this Field those of ordinary skill can be appreciated that the application of other techniques and/or the use of other materials.

In the description of this specification, reference term " implementation method ", " some implementation methods ", " schematically implementation It is specific that the description of mode ", " example ", " specific example " or " some examples " etc. means to combine implementation method or example is described Feature, structure, material or feature are contained at least one implementation method of the present utility model or example.In this specification In, the schematic representation to above-mentioned term is not necessarily referring to identical implementation method or example.And, the specific spy of description Levy, structure, material or feature can in an appropriate manner be combined in one or more any implementation methods or example.

While there has been shown and described that implementation method of the present utility model, one of ordinary skill in the art can manage Solution：These implementation methods can be carried out in the case where principle of the present utility model and objective is not departed from various changes, modification, Replace and modification, scope of the present utility model is limited by claim and its equivalent.

Claims (10)

1. it is a kind of to fan head, for bladeless fan, it is characterised in that the fan head includes outlet section and inlet section, the outlet section Including two air-out sub-portions, each described air-out sub-portion offers exhaust passage and air channel, and the exhaust passage connects the air channel simultaneously Air outlet is formed in the side of the air-out sub-portion, the direction of two air outlets is identical, described two air-out sub-portion intervals Relatively it is connected on the inlet section, the inlet section offers air inlet duct, two air channels are connected to away from institute One end both sides of the air inlet duct of the air inlet of air inlet duct are stated, is set on the air inlet duct inwall relative with the air inlet There is the first sound-absorbing element.

It is 2. as claimed in claim 1 to fan head, it is characterised in that the air-out sub-portion includes the baffle plate away from the inlet section, The baffle plate is the end stop in the air channel, and the second sound-absorbing unit is provided with the inner surface of the baffle plate for limiting the air channel Part.

3. it is as claimed in claim 1 to fan head, it is characterised in that the inner surface of the exhaust passage is formed with so that the exhaust passage In the sound proof part of variable section structure.

4. it is as claimed in claim 3 to fan head, it is characterised in that the sound proof part offers the sound insulation chamber of closing.

It is 5. as claimed in claim 4 to fan head, it is characterised in that to be provided with dividing plate at the air outlet in the air channel, The dividing plate extends from the side inwall in the air channel to the relative opposite side inwall direction in the air channel, and the dividing plate is to described The bending of air outlet direction extends and is connected to form the sound insulation chamber with the side inwall in the air channel；

Dividing plate opposite side inwall relative with the air channel separates to form the exhaust passage.

6. it is as claimed in claim 3 to fan head, it is characterised in that the width of the exhaust passage is along the air channel to the air channel Outer direction first diminishes and becomes big afterwards.

7. fan head as claimed in claim 3, it is characterised in that the minimum widith of the width of the air outlet and the exhaust passage Ratio be more than or equal to 6.

8. it is as claimed in claim 1 to fan head, it is characterised in that the inwall in the air channel forms the oriented exhaust passage direction and inclines Oblique wind-guiding face.

9. it is as claimed in claim 1 to fan head, it is characterised in that the inlet section includes the connection outer barrel and the connection that are coaxially disposed Inner cylinder, the connection inner cylinder offers the air inlet duct, and the fan head includes seal, the seal include upper end and under End, the upper end is tightly connected the connection inner cylinder, the tapered expansion structure in lower end.

10. a kind of bladeless fan, it is characterised in that including the fan head as described in any one of claim 1~9.