CN106762852B

CN106762852B - Fan head and bladeless fan

Info

Publication number: CN106762852B
Application number: CN201611036035.6A
Authority: CN
Inventors: 程杰锋; 李忠华; 魏喜明; 王跃; 王学超; 李长明
Original assignee: Midea Group Co Ltd
Current assignee: Midea Group Co Ltd; Guangdong Midea White Goods Technology Innovation Center Co Ltd
Priority date: 2016-11-15
Filing date: 2016-11-15
Publication date: 2020-02-04
Anticipated expiration: 2036-11-15
Also published as: CN106762852A

Abstract

The invention discloses a fan head and a bladeless fan, wherein the fan head can be used for the bladeless fan, the fan head comprises an air outlet part, the air outlet part is provided with an air channel and an air outlet channel, the air outlet channel is communicated with the air channel, an air outlet is formed in the side face of the air outlet part, and a sound insulation part which enables the air outlet channel to be of a variable cross-section structure is formed in the inner surface of the air outlet channel. Because the sound-insulating part is formed on the inner side of the air outlet channel, when the bladeless fan works, the pneumatic noise formed by the ejection of the air outlet channel from the air channel can be reflected back to the air channel by the sound-insulating part, and meanwhile, the air outlet channel with the variable cross-section structure enables the path of the air flow passing through the air outlet channel to be lengthened, so that the noise is difficult to be transmitted from the air outlet channel to the outside of the fan head, therefore, the pneumatic noise at the air outlet can be effectively reduced, and the user experience of the bladeless fan is improved. The bladeless fan comprises the fan head.

Description

Fan head and bladeless fan

Technical Field

The invention relates to the field of domestic electric appliances, in particular to a fan head and a bladeless fan.

Background

Existing bladeless fans include a fan head. The fan head is provided with an air outlet channel and an air outlet. When the bladeless fan works, the airflow is sprayed out from the air outlet channel and the air outlet and can form large pneumatic noise at the air outlet channel, so that the user experience is influenced.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the present invention is directed to a fan head and a bladeless fan.

The fan head provided by the embodiment of the invention can be used for a bladeless fan, and comprises an air outlet part, wherein the air outlet part is provided with an air channel and an air outlet channel, the air outlet channel is communicated with the air channel, an air outlet is formed in the side surface of the air outlet part, and a sound insulation part which enables the air outlet channel to be of a variable cross-section structure is formed in the inner surface of the air outlet channel.

In the fan head of the embodiment of the invention, the sound insulation part is formed on the inner side of the air outlet channel, when the bladeless fan works, the pneumatic noise formed by the air flow sprayed out of the air outlet channel from the air channel can be reflected back into the air channel by the sound insulation part, and meanwhile, the air outlet channel with the variable cross-section structure lengthens the path of the air flow passing through the air outlet channel, so that the noise is difficult to be transmitted from the air outlet channel to the outside of the fan head, therefore, the pneumatic noise at the air outlet can be effectively reduced, and the user experience of the bladeless fan is improved.

In one embodiment, the sound insulation portion is opened with a closed sound insulation cavity.

In one embodiment, a partition board is arranged in the air duct and close to the air outlet, the partition board extends from the inner wall of one side of the air duct to the inner wall of the other opposite side of the air duct, the partition board extends in a bending manner towards the air outlet and is connected with the inner wall of one side of the air duct to form the sound insulation cavity, and the partition board is separated from the inner wall of the other opposite side of the air duct to form the air outlet.

In one embodiment, the outlet is formed at a single side of the outlet portion.

In one embodiment, the width of the air outlet channel is first reduced and then increased along the direction from the inside of the air channel to the outside of the air channel.

In one embodiment, the ratio of the width of the air outlet to the minimum width of the air outlet channel is greater than or equal to 6.

In one embodiment, a sound attenuating element is disposed on an inner wall of the air duct.

In one embodiment, a spacing rib is arranged in the air outlet to divide the air outlet into a plurality of air outlets.

In one embodiment, the fan head comprises an air inlet portion, the air inlet portion is provided with an air inlet, the air inlet is communicated with the air duct, and an air guide surface inclined towards the direction of the air outlet duct is formed on the inner wall of the air duct.

In one embodiment, the air outlet portion includes two air outlet portions, each of the air outlet portions is provided with the air outlet duct, the air duct and the air outlet, the two air outlet portions are arranged oppositely at an interval, and the two air outlets are oriented in the same direction.

In one embodiment, one end of each of the air outlet portions is open to form an open end, the other end of each of the air outlet portions is closed to form a closed end, the open end is provided with a vent communicated with the air duct, the two open ends are connected through an air inlet portion, the air inlet portion is provided with an air inlet, each of the open ends is communicated with the air inlet, and the two closed ends are arranged oppositely at intervals.

In one embodiment, one end of each of the air outlet portions is open to form an open end, the other end of each of the air outlet portions is closed to form a closed end, the open end is provided with a vent communicated with the air duct, the two open ends are connected through an air inlet portion, the air inlet portion is provided with an air inlet, each vent is communicated with the air inlet, and the two closed ends are connected through a connecting portion.

In one embodiment, two openings at two ends of each air outlet portion respectively form a first opening end and a second opening end, the first opening end is provided with a vent communicated with the air duct, the two first opening ends are connected through an air inlet portion, the air inlet portion is provided with an air inlet, each vent is communicated with the air inlet, the two second opening ends are connected through a connecting portion, and the connecting portion is of a closed structure.

In one embodiment, the connection is a curved connection.

In one embodiment, the air inlet portion includes a connecting outer cylinder and a connecting inner cylinder, which are coaxially disposed, and the connecting inner cylinder is provided with the air inlet.

In one embodiment, the fan head comprises a sealing element, the sealing element comprises an upper end and a lower end, the upper end is connected with the connecting inner cylinder in a sealing mode, and the lower end is in a conical expansion structure.

The bladeless fan comprises a power system and the fan head in any one of the above embodiments, wherein the power system is used for generating high-pressure air flow, and the fan head is connected with the power system and used for receiving the high-pressure air flow and jetting the high-pressure air flow through the air channel and the air outlet through the air outlet.

In the bladeless fan provided by the embodiment of the invention, the sound insulation part is formed on the inner side of the air outlet channel, when the bladeless fan works, the pneumatic noise formed by the air flow sprayed out of the air outlet channel from the air channel can be reflected back into the air channel by the sound insulation part, and meanwhile, the air outlet channel with the variable cross-section structure lengthens the path of the air flow passing through the air outlet channel, so that the noise is difficult to be transmitted from the air outlet channel to the outside of the fan head, therefore, the pneumatic noise at the air outlet can be effectively reduced, and the user experience of the bladeless fan is improved.

Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a perspective view of a fan head according to an embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view of a fan head according to an embodiment of the present invention.

Fig. 3 is an enlarged schematic view of a portion of the fan head ii of fig. 2.

Fig. 4 is another schematic cross-sectional view of a fan head according to an embodiment of the present invention.

Fig. 5 is an enlarged schematic view of a portion of the fan head iv of fig. 4.

Fig. 6 is another perspective view of a fan head according to an embodiment of the present invention.

Fig. 7 is a further cross-sectional schematic view of a fan head in accordance with an embodiment of the present invention.

Fig. 8 is a further perspective view of a fan head according to an embodiment of the present invention.

Fig. 9 is a further cross-sectional view of a fan head according to an embodiment of the present invention.

Fig. 10 is a further perspective view of a fan head according to an embodiment of the present invention.

Fig. 11 is yet another schematic cross-sectional view of a fan head in accordance with an embodiment of the invention.

Fig. 12 is an exploded view of a fan head according to an embodiment of the present invention.

Fig. 13 is a perspective view of a sealing member of a fan head according to an embodiment of the present invention.

Fig. 14 is a perspective view of a bladeless fan according to an embodiment of the present invention.

Fig. 15 is a perspective view of a base of a bladeless fan according to an embodiment of the present invention.

Fig. 16 is a schematic cross-sectional view of a base of a bladeless fan according to an embodiment of the present invention.

Description of the main element symbols:

a bladeless fan 100;

a fan head 10;

the air conditioner comprises a sealing element 11, an upper end 111, a lower end 112, a positioning groove 113, an air outlet part 12, an air duct 121, a partition 1211, an air guide surface 1213, a transition arc surface 1213a, an air outlet duct 122, an air outlet 123, a sound insulation part 124, an air outlet part 125, an air inlet part 14, an air inlet 141, a connecting part 16, an open end 215, a closed end 216, a vent 217, an open end 315, a closed end 316, a vent 317, a first open end 415, a second open end 416 and a vent 417;

a base 20;

the power system 21, the impeller shell 211, the impeller 212, the motor 213, the air inlet 214, the diffuser 215, the motor shell 216, the air passage 216a, the shell 22, the wall 221, the air inlet 222 and the air inlet 223.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1 to 5, a fan head 10 according to an embodiment of the present invention can be used for a bladeless fan. The fan head 10 includes an air outlet portion 12. The air outlet portion 12 is provided with an air duct 121 and an air outlet duct 122. The air outlet passage 122 is communicated with the air passage 121 and forms an air outlet 123 at a side of the air outlet portion 12. The inner surface of the outlet duct 122 is formed with a soundproof portion 124 that makes the outlet duct 122 have a variable cross-sectional structure.

In the fan head 10 according to the embodiment of the present invention, the sound insulating portion 124 is formed inside the air outlet duct 122. When the bladeless fan comprising the fan head 10 works, the pneumatic noise formed by the ejection of the air flow from the air channel 121 through the air outlet channel 122 can be reflected back into the air channel 121 by the sound insulation part 124, and meanwhile, the air outlet channel 122 with the variable cross-section structure enables the path of the air flow passing through the air outlet channel 122 to be long, so that the noise is difficult to be transmitted from the air outlet channel 122 to the outside of the fan head 10, therefore, the pneumatic noise at the air outlet can be effectively reduced, and the user experience of the bladeless fan is improved.

In one embodiment, sound-deadening portion 124 opens with a closed sound-deadening chamber 1241.

In this way, sound insulation chamber 1241 can enhance the intensity of sound reflected and absorbed by sound insulation portion 124, thereby improving the sound insulation effect of sound insulation portion 124.

In the embodiment of the present invention, the closed sound-proof cavity 1241 means that the interior of the sound-proof cavity 1241 is not communicated with the air duct 121 and the air outlet 122, so that noise caused by air leakage from the sound-proof cavity 1241 can be avoided.

In one embodiment, a partition 1211 is disposed within the air duct 121 proximate to the air outlet 123. The partition 1211 extends from one inner wall of the air duct 121 to the opposite inner wall of the air duct 121. The partition 1211 extends in a bending manner toward the outlet 123 and is connected to one side of the inner wall of the air duct 121 to form a sound insulation chamber 1241. The partition 1211 is spaced apart from the opposite inner side wall of the air path 121 to form an air path 122.

In this way, the sound-proof cavity 1241 is surrounded by the partition 1211 and the inner wall of the air duct 121, so that the sound-proof cavity 1241 is relatively simple to manufacture, and the structure of the air outlet portion 12 is relatively compact.

In one embodiment, the outlet 123 is formed at one side of the outlet part 12.

So, fan head 10 is the unilateral air-out, and the air-out is more concentrated like this, and user experience is better.

In one embodiment, the width of the air outlet channel 122 is gradually decreased and then increased along the direction from the inside of the air channel 121 to the outside of the air channel 121.

Therefore, the flow velocity of the air flow entering the air outlet duct 122 from the air duct 121 can be increased and then reduced to a certain extent, and a gradual diffusion trend can be formed at the air outlet 123, so that the air outlet noise at the air outlet 123 can be further reduced.

In one embodiment, referring to fig. 3, the ratio of the width d1 of the wind outlet 123 to the minimum width d2 of the wind channel 122 is greater than or equal to 6. In this way, the ratio of the width d1 of the outlet opening 123 to the minimum width d2 of the air channel 122 is moderate, so that the flow rate of the air flow blown out by the outlet opening 123 is not affected, and the noise at the outlet opening 123 is small.

In one embodiment, a sound attenuating element (not shown) is disposed on an inner wall of the air duct 121. In this way, the silencing element eliminates and dissipates a portion of the noise generated in the air duct 121, which further reduces the noise generated during operation of the fan head 10.

It will be appreciated that the sound attenuating element is, for example, a piece of cotton or the like made of a bulky material. The noise reduction element has a plurality of staggered pores, so that the noise reduction element has a good sound absorption effect, and the noise reduction performance of the bladeless fan with the fan head 10 is further improved.

In one embodiment, a spacing rib 1231 is provided in the outlet port 123 to space the outlet port 123 into a plurality of ports 1232.

So, the interval muscle 1231 can guarantee the homogeneity of the clearance width of air outlet 123 department to make the air-out of air outlet 123 more even. And ensure to control the gap and the strength of the nozzle of the air duct

In one embodiment, the fan head 10 includes an air inlet 14. The air inlet portion 14 is opened with an air inlet 141. The air inlet 141 is communicated with the air duct 121. The inner wall of the air duct 121 is formed with an air guide surface 1213 inclined in the direction of the air outlet duct 122.

Thus, after the air flow enters the air duct 121 from the air inlet 141, the air flow can accelerate under the action of the air guide surface 1213 and enter the air outlet duct 122, so that the speed of the air flow can be increased to enhance the air outlet effect.

In order to avoid airflow noise at the cut-off of the air guide surface 1213, a transition arc surface 1213a connected to the air guide surface 1213 may be formed in the inner wall of the air duct 121 to reduce the flow resistance of the airflow.

In one embodiment, please refer to fig. 2 and 3, the air outlet portion 12 includes two air outlet portions 125. Each air outlet portion 125 is provided with an air outlet duct 122, an air duct 121 and an air outlet 123. The two outlet portions 125 are disposed opposite to each other at an interval, and the two outlets 123 have the same direction.

Thus, because the two air outlet sub-portions 125 are used for air outlet, the area of the outlet face of the air outlet portion 12 is increased, and the user experience is improved.

In one embodiment, referring to fig. 6 and 7, one end of each outlet portion 125 is open to form an open end 215, and the other end is closed to form a closed end 216. The open end 215 is provided with a vent 217 communicating with the air duct 121. The two open ends 215 are connected by the air inlet portion 14. The air inlet portion 14 is provided with an air inlet 141, each air vent 217 is communicated with the air inlet 141, and the two closed ends 216 are oppositely arranged at intervals.

Therefore, the air outlet direction of the air outlet portion 12 is concentrated, and noise caused by the convergence of the air in the air duct 121 at the top of the fan head 10 can be avoided.

In one embodiment, referring to fig. 8 and 9, one end of each air outlet portion 125 is open to form an open end 315, and the other end is closed to form a closed end 316. The open end 315 is provided with a vent 317 communicated with the air duct 121, the two open ends 315 are connected through the air inlet portion 14, the air inlet portion 14 is provided with an air inlet 141, each vent 317 is communicated with the air inlet 141, and the two closed ends 316 are connected through the connecting portion 16.

So, make the air-out direction of air-out portion 12 comparatively concentrate, can avoid the wind in wind channel 121 to converge at the top of fan head 10 and produce the noise simultaneously, and connecting portion 16 connects two air-out portions 12 for fan head 10 easily installs on the bladeless fan and guarantees fan head 10's intensity.

Specifically, the connecting portion 16 may be a solid structure or a hollow structure, and since the connecting portion 16 is connected to the closed end 316, no matter whether the connecting portion 16 is a solid structure or a hollow structure, the wind in the wind tunnel 121 does not enter the connecting portion 16, thereby avoiding the generation of noise.

In one embodiment, referring to fig. 10 and 11, two ends of each outlet portion 125 are opened to form a first opening end 415 and a second opening end 416, respectively. The first open end 415 is provided with a vent 417 communicating with the air duct 121. The two first open ends 415 are connected by the air inlet portion 14. The air inlet portion 14 is opened with an air inlet 141, each air vent 417 is communicated with the air inlet 141, and the two second opening ends 415 are connected by a connecting portion 16. The connecting portion 16 is a closed structure.

Specifically, the connecting portion 16 may be a solid structure or a hollow structure, the solid structure may facilitate the manufacture of the connecting portion 16, and the hollow structure may reduce the weight of the fan head 10. When the connecting portion 16 is a solid structure, the connecting portion 16 is not communicated with the air duct 121, and the air in the air duct 121 does not enter the connecting portion 16. When the connecting portion 16 has a hollow structure, the surface of the connecting portion 16 is closed to form a closed structure, and the wind in the wind path 121 does not enter the connecting portion 16. Thus, the wind in the two wind outlet portions 125 does not join at the top of the fan head 10.

In the example shown in fig. 11, the connecting portion 16 is a solid structure.

In one embodiment, the connection 16 is a curved connection. Therefore, the fan head is not easy to break when being stressed.

Specifically, the connecting portion 16 may be formed in a circular arc shape. The connecting portion 16 is connected with the air outlet portion 12 in a tangent mode, so that the fan head 10 is attractive in appearance, and the user experience degree is improved.

In one embodiment, the air inlet 14 includes a connecting outer cylinder 142 and a connecting inner cylinder 143 that are coaxially disposed. The connection inner cylinder 143 has an air inlet 141.

Thus, the air inlet portion 14 can be connected with the base of the bladeless fan through the connecting outer cylinder 142 in a matching manner, so that the bladeless fan can be installed smoothly, and air can be fed through the air inlet 141 formed in the position of the communicating inner cylinder 143.

In one embodiment, referring to fig. 12 and 13, the fan head 10 includes a seal 11. The seal 11 includes an upper end 111 and a lower end 112. The upper end 111 is connected with the inner cylinder 143 in a sealing way. Lower end 112 has a tapered expanded configuration.

Thus, the lower end 112 can be used for being connected with the air outlet end of the power system 21 connected with the fan head 10 in a sealing manner, and when the fan head 10 is installed on the corresponding base, the lower end 112 with the conical expansion structure is favorable for being sleeved with the air outlet end of the power system 21, and the fan head 10 is enabled to be attached to the base more tightly, so that the sealing element 11 is arranged to reduce the probability that air flow flows backwards into the cavity of the base connected with the fan head 10 from the fan head 10, and further, the wind noise is reduced, and the air outlet effect of the fan head 10 is improved.

Specifically, in order to make the air outlet effect of the bladeless fan with the fan head 10 better, the fan head 10 is generally longer than the base, which makes the path of the air flow to the air duct 121 longer and the resistance greater. If the sealing member 11 is lacked, the air flow can easily flow backward in the cavity of the base due to the long path of the air duct 121 and the large resistance, so that a large wind noise is formed, and the air outlet effect is poor. The sealing element 11 is arranged to make the sealing element 11 and the air outlet end of the power system 21 and the fan head 10 in a joint sealing state, so that the problems can be solved.

In order to make the sealing member 11 and the connecting inner cylinder 143 connected more tightly, the end surface of the upper end 111 is provided with a positioning groove 113, and the connecting inner cylinder 143 is formed with a locking portion (not shown) which can be locked into the positioning groove 113.

In one example, the sealing member 11 may be a silicone sealing hose having a hardness in the range of 50-60 and a moderate elasticity to allow for expansion and contraction.

Referring to fig. 14 to 16, a bladeless fan 100 according to an embodiment of the present invention includes a power system 21 and a fan head 10 according to any of the above embodiments. The power system 21 is used to generate a high pressure airflow. The fan head 10 is connected to the power system 10, and is configured to receive the high-pressure airflow and eject the high-pressure airflow through the air duct 121 and the air outlet 123 via the air outlet 123.

In the bladeless fan 100 according to the embodiment of the present invention, the sound insulation portion 124 is formed inside the air outlet duct 122. When the bladeless fan 100 works, the aerodynamic noise formed by the air flow ejected from the air duct 121 through the air outlet duct 122 can be reflected back into the air duct 121 by the sound insulation part 124, and meanwhile, the air outlet duct 122 with the variable cross-section structure enables the path of the air flow passing through the air outlet duct 122 to be long, so that the noise is difficult to be transmitted from the air outlet duct 122 to the outside of the fan head 10, therefore, the aerodynamic noise at the air outlet 123 can be effectively reduced, and the user experience of the bladeless fan 100 is improved.

In one embodiment, bladeless fan 100 further comprises a base 20. The fan head 10 is disposed on the base 20. The base 20 houses a power system 21.

Thus, the bladeless fan 100 is convenient to place, and the practicability and the stability of the bladeless fan 100 are improved.

To facilitate air intake, the base 20 includes a housing 22, the housing 22 includes a wall 221, an air inlet 222 is opened on the wall 221, and the power system 21 sucks air through the air inlet 222 to establish a high-pressure air flow.

It can be understood that, in order to make the air intake area of the wall 221 larger and make the intake air more uniform, the wall 221 may be arranged in a ring shape, and the air inlets 222 may form the air inlets 223 arranged in an array. The air inlet holes 223 are arranged in a plurality of arrays along the circumferential direction of the wall 221, and two adjacent arrays are arranged at intervals.

In the present example, the power system 21 includes an impeller housing 211, an impeller 212, a motor 213, a diffuser 215, and a motor housing 216. The impeller housing 211 may be mounted within the housing 10, for example, by means of a damping element, such as a rubber sleeve. The impeller housing 211 is formed with an intake port 214 communicating with the intake port 221. The impeller 212 is disposed within the impeller housing 211. The motor 213 is used to drive the impeller 212. A diffuser 215 is disposed downstream of the flow generated by the impeller 212, and the diffuser 215 is connected to the impeller housing 211.

The motor housing 216 is used to fix the motor 213. The motor housing 216 can prevent the motor 213 from wobbling during operation. The motor housing 216 is connected to the impeller housing 211 and a gas passage 216a is formed between the motor housing 216 and the impeller housing 211, the gas passage 216a communicating with the diffuser 215.

As shown by the dotted arrows in fig. 16, when the bladeless fan 100 operates, the motor 213 drives the impeller 212 to rotate, air passes through the air inlet 221 and the air inlet 214 in sequence and is sucked into the impeller 212, the impeller 212 accelerates and pressurizes the air to form a high-pressure air flow, the high-pressure air flow passes through the air passage 216a and the diffuser 215 in sequence and enters the air duct 121 of the fan head 10, and finally is ejected from the air outlet 123, so that the high-pressure air flow ejected from the air outlet 123 can entrain surrounding air to form air, thereby forming air, and achieving the effects of cooling and enjoying cool for a user.

In addition, when the bladeless fan 100 is started, the rotation speed of the motor 213 is gradually increased, and when the bladeless fan 100 stops operating, the rotation speed of the motor 213 is gradually decreased, so that the bladeless fan 100 can be slowly started and stopped, vibration of the bladeless fan 100 can be reduced, and noise can be reduced.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

In the description of the present specification, reference to the description of the terms "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A fan head is used for a bladeless fan and is characterized by comprising an air outlet part, wherein the air outlet part is provided with an air channel and an air outlet channel, the air outlet channel is communicated with the air channel, an air outlet is formed in the side face of the air outlet part, a sound insulation part which enables the air outlet channel to be of a variable cross-section structure is formed on the inner surface of the air outlet channel, and a closed sound insulation cavity is formed in the sound insulation part;

a partition board is arranged in the air duct and close to the air outlet, extends from the inner wall of one side of the air duct to the inner wall of the other side of the air duct, bends and extends towards the air outlet and is connected with the inner wall of one side of the air duct to form the sound insulation cavity;

the partition board is separated from the inner wall of the other side opposite to the air duct to form the air outlet duct.

2. The fan head according to claim 1, wherein the air outlet is formed at a single side of the air outlet portion.

3. The fan head according to claim 1, wherein the width of said air outlet channel is first reduced and then increased along the direction from the inside of said air channel to the outside of said air channel.

4. The fan head according to claim 1, wherein the ratio of the width of said outlet to the minimum width of said outlet duct is greater than or equal to 6.

5. The fan head according to claim 1, wherein a sound attenuating element is provided on an inner wall of the air duct.

6. The fan head of claim 1 wherein spacing ribs are provided in the outlet to space the outlet into a plurality of outlets.

7. The fan head as claimed in claim 1, wherein the fan head comprises an air inlet portion, the air inlet portion is provided with an air inlet, the air inlet is communicated with the air duct, and an air guide surface inclined towards the direction of the air outlet duct is formed on the inner wall of the air duct.

8. The fan head according to claim 1, wherein the air outlet portion comprises two air outlet portions, each air outlet portion is provided with the air outlet duct, the air duct and the air outlet, the two air outlet portions are arranged oppositely at an interval, and the two air outlets are oriented in the same direction.

9. The fan head as claimed in claim 8, wherein one end of each of the outlet portions is open to form an open end, the other end is closed to form a closed end, the open end is provided with a ventilation opening communicated with the air duct, the two open ends are connected through an air inlet portion, the air inlet portion is provided with an air inlet, each of the open ends is communicated with the air inlet, and the two closed ends are oppositely arranged at an interval.

10. The fan head as claimed in claim 8, wherein one end of each of the outlet portions is open to form an open end, the other end is closed to form a closed end, the open end is provided with a ventilation opening communicated with the air duct, the two open ends are connected through an air inlet portion, the air inlet portion is provided with an air inlet, each ventilation opening is communicated with the air inlet, and the two closed ends are connected through a connecting portion.

11. The fan head according to claim 8, wherein openings at two ends of each of the air outlet portions respectively form a first opening end and a second opening end, the first opening end is provided with a ventilation opening communicated with the air duct, the two first opening ends are connected through an air inlet portion, the air inlet portion is provided with an air inlet, each ventilation opening is communicated with the air inlet, the two second opening ends are connected through a connecting portion, and the connecting portion is a closed structure.

12. Fan head according to claim 10 or 11, characterized in that the connection is a curved connection.

13. The fan head according to any one of claims 9 to 11, wherein the air inlet portion comprises a connecting outer cylinder and a connecting inner cylinder which are coaxially arranged, and the connecting inner cylinder is provided with the air inlet.

14. The fan head as claimed in claim 13, wherein said fan head includes a seal, said seal including an upper end and a lower end, said upper end sealingly engaging said inner connecting barrel, said lower end having a tapered expanding configuration.

15. A bladeless fan, comprising:

a power system for generating a high pressure gas stream; and

a fan head according to any of claims 1 to 14;

the fan head is connected with the power system and used for receiving the high-pressure airflow and jetting the high-pressure airflow through the air duct and the air outlet through the air outlet.