CN211039111U - Bladeless fan device - Google Patents

Abstract

The utility model provides a bladeless fan device, which comprises a chassis, a base and a fan head, wherein an air power device, a bottom air inlet and an upper air outlet are arranged in the base; the fan head is provided with a central through cavity and a plurality of peripheral through cavities, an inner airflow channel positioned between the central through cavity and the peripheral through cavities, an outer airflow channel positioned at the periphery of the peripheral through cavities and an intermediate airflow channel positioned between two adjacent peripheral through cavities are arranged inside the fan head, and the airflow channels jointly form an integral airflow channel communicated with the upper air outlet; the fan head is provided with a plurality of air outlets at the front side, each through cavity is provided with a plurality of external air inlets communicated with the whole air flow channel, and external air in each through cavity can be sucked into the whole air flow channel through the external air inlets and is ejected out through the air outlets along with air flow in the whole air flow channel. The utility model discloses a many wind gaps of fan head set up, have improved the air-out efficiency on the unit area and the amount of wind of unit time.

Description

Bladeless fan device

The technical field is as follows:

The utility model relates to a fan technical field especially relates to a bladeless fan device.

Background art:

Conventional fans, such as household fans, typically include blades or vanes that are rotatably mounted about the axis of the fan, with the rotation of the blades or vanes creating a movement and circulation of the airflow. However, the wind blown by the conventional fan has stage impact and wave-shaped stimulation, and the exposed fan blades are easy to damage and difficult to clean. As for bladeless fans currently on the market, they have more or less technical problems such as no wind or little wind in the center of the whole, loud noise, etc.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above-mentioned defects, it would be advantageous to provide a bladeless fan assembly that is safe, easy to clean, has a large air output, and is stable and soft.

Therefore, this novel bladeless fan device that provides, its characterized in that includes:

A chassis configured for placement on a work surface;

The base is arranged on the chassis, an air power device is arranged in the base, and the base is also provided with a bottom air inlet and an upper air outlet;

The fan head is provided with a central through cavity and a plurality of peripheral through cavities which are positioned on the periphery of the central through cavity and are uniformly distributed along the circumferential direction, an inner airflow channel positioned between the central through cavity and the plurality of peripheral through cavities, an outer airflow channel positioned on the periphery of the plurality of peripheral through cavities and a middle airflow channel positioned between two adjacent peripheral through cavities are arranged inside the fan head, and the inner airflow channel and the outer airflow channel are communicated by virtue of the middle airflow channels so as to jointly form an integral airflow channel communicated with the upper air outlet;

The fan head is provided with a plurality of air outlets distributed along the air flow channels, a plurality of external air inlets communicated with the whole air flow channel are arranged on the through cavities, and external air in the through cavities can be sucked into the whole air flow channel through the external air inlets and can be ejected out through the air outlets along with air flow in the whole air flow channel.

The utility model discloses in, through in the air power device with outside air via bottom air intake suction base to in sending into the whole wind channel of fan head via the upper portion air intake, then get into each outer airflow channel, middle airflow channel and interior airflow channel respectively, the in-process that flows through in these airflow channels simultaneously through each outside air intake suction respectively link up the inside outside air of intracavity and together get into the air outlet blowout. The multiple air outlets of the fan head ensure that the fan head has higher air quantity on an air outlet surface with a certain area, and the air outlet efficiency in unit area and the air quantity in unit time are improved.

Further, the fan head comprises a fan head seat, a fan head cover matched with the fan head seat, a first air guide sleeve assembly comprising a plurality of first air guide sleeves and a second air guide sleeve, wherein the fan head seat and the fan head cover are constructed to jointly form a central through cavity, a peripheral through cavity and an integral airflow channel when being assembled together, the first air guide sleeves and the second air guide sleeves are fixed on the fan head cover and are contained in the integral airflow channel, the number of the first air guide sleeves corresponds to that of the peripheral through cavities, each first air guide sleeve is arranged on the periphery of one corresponding peripheral through cavity, and the second air guide sleeve is arranged on the periphery of the central through cavity, so that the first air guide sleeves and the second air guide sleeves can guide airflow in the integral airflow channel to be ejected out of the air outlet.

Through the structure, the airflow in the whole airflow channel can be guided by the first air guide sleeve and the second air guide sleeve.

Still further, the fan head seat comprises a seat body with a shell wall, a central through cavity seat which is positioned on the seat body and extends forwards, and a plurality of peripheral through cavity seats which extend forwards on the periphery of the central through cavity seat and are uniformly distributed along the circumferential direction; the fan head cover is arranged on the front side of the fan head seat and comprises a cover body, a central through cavity cover which is positioned on the cover body and extends backwards, and a plurality of peripheral through cavity covers which extend backwards on the periphery of the central through cavity cover and are uniformly distributed along the circumferential direction, wherein the central through cavity cover and the central through cavity seat are in butt joint to form a central through cavity wall of the central through cavity so as to form a central through cavity therein, the peripheral through cavity cover and the peripheral through cavity seat are in butt joint to form a peripheral through cavity wall of the peripheral through cavity so as to form a peripheral through cavity therein, in addition, the inner side wall of the peripheral through cavity wall and the central through cavity wall jointly form an inner air flow channel, and the outer side wall of the peripheral through cavity wall and the shell wall of the fan head seat jointly form an outer air flow channel.

Through the structural arrangement, the through cavities and the air flow channels are formed.

Still further, the front end of the first air guide sleeve is fixed on the sleeve body of the fan head sleeve, and the rear end of the first air guide sleeve extends into the integral airflow channel; the front end of the second air guide sleeve is fixed on the sleeve body of the fan head sleeve, and the rear end of the second air guide sleeve extends into the integral airflow channel; the first air guide sleeve is in a fan shape, the outer sleeve wall of the first air guide sleeve is positioned in the outer airflow channel and forms a peripheral airflow guide cavity together with the outer side wall of the peripheral through cavity wall, the peripheral airflow guide cavity is communicated with the air outlet, and an external air inlet is arranged on the outer side wall of the peripheral through cavity wall, so that airflow in the outer airflow channel can enter the peripheral airflow guide cavity along the rear end of the outer sleeve wall and can be sprayed out from the air outlet along with external air sucked by the external air inlet; and the inner cover wall of the first air guide cover and the cover wall of the second air guide cover are positioned in the inner air flow channel to form an inner air flow channel communicated with the air outlet at the upper part of the base, an inner air flow guide cavity communicated with the air outlet is formed between the inner air flow channel and the inner air flow channel, a flow guide gap serving as a rear end opening of the inner air flow channel is arranged between the free end of the inner cover wall of the first air guide cover and the free end of the cover wall of the second air guide cover, and the inner side wall with the periphery penetrating through the cavity wall and the central penetrating cavity wall are both provided with an external air inlet, so that the air flow from the air outlet at the upper part of the base can enter the inner air flow guide cavity from the inner air flow channel through the flow guide gap and is sprayed out from the air outlet along with the external air sucked through the external air inlet.

Through the structure, each airflow guide cavity can be formed in each airflow channel, so that airflow can be effectively guided to be sprayed out from the air outlet.

Still further, the cross-sectional shape of the inner airflow channel is consistent with that of the aircraft airfoil NACA23021, and the cross-sectional shape of the inner airflow channel is rectangular; the cross-sectional shape of the outer casing wall of the first air guide casing is consistent with the cross-sectional shape of one side airfoil of the NACA23021 airplane airfoil.

Furthermore, the external air inlet on the central through cavity wall is formed by a discontinuous opening reserved between the central through cavity cover and the central through cavity seat, and the external air inlet on the peripheral through cavity wall is formed by a discontinuous opening reserved between the peripheral through cavity cover and the peripheral through cavity seat.

Furthermore, an inverted V-shaped partition plate is arranged at the upper air outlet corresponding to the base in the fan head, and the inverted V-shaped partition plate is arranged to divide the air flow from the upper air outlet, so that the divided air flow enters the whole air flow channel through three paths.

Still further, an air heater is arranged in the base, is positioned below the upper air inlet and is positioned above the aerodynamic device.

Through air heater's setting, can heat the air current when needing to make bladeless fan device satisfy the demand of going out hot-blast.

Further, the aerodynamic device comprises a diffuser fixed on the base, an impeller shell positioned below the diffuser, a motor bracket fixed on the impeller shell, a motor fixed on the motor bracket, a fairing fixed on the motor bracket, an impeller fixed on the motor, an impeller air inlet shell fixed on the impeller shell and positioned below the impeller, an air collector positioned below the impeller shell and hermetically connected with the impeller air inlet shell through a rubber ring and tightly contacted with the inner wall of the shell of the base, and a silencing cavity device, wherein the silencing cavity device is positioned between the diffuser and the air collector and is arranged on the air collector through a rubber ring, and the damping rubber plugs are elastically and tightly connected with the inner wall of the shell of the base through damping rubber plugs which are distributed on the shell of the silencing cavity device at intervals, and the silencing cavity device is arranged to surround part of the diffuser and part of the shell of the impeller air inlet.

Still further, the silencing cavity device comprises a silencing cavity bracket, a silencing cavity component arranged on the inner side wall of the silencing cavity bracket, and a silencing cavity upper cover positioned above the silencing cavity bracket and the silencing cavity component, wherein the silencing chamber member is formed by connecting a plurality of perforated plates distributed along the circumferential direction, a Helmholtz resonance chamber is formed between each perforated plate and the silencing chamber support and the upper silencing chamber cover, each perforated plate comprises a plurality of perforated parts with different settings in terms of aperture, perforation rate and aperture thickness so as to divide the Helmholtz resonance chamber into sub-resonance chambers with different frequencies, the perforated plate is provided with sound absorption cotton corresponding to the position between two adjacent secondary resonance cavities, the sound absorption cavity bracket is also provided with an annular cavity positioned outside the Helmholtz resonance cavity, the interior of the annular cavity is provided with lamellar silencing cotton, and the outer side wall of the silencing cavity support is provided with the damping rubber plug.

Through the structure, the resonance can be formed with the sounds with different frequencies, and the effect of absorbing the noise with wider frequency is achieved. In addition, due to the arrangement of the shock-absorbing rubber plugs on the outer side walls of the silencing cavity brackets, the shock-absorbing rubber plugs can be mounted with the inner wall of the shell of the base through extrusion, so that shock generated when the motor rotates at a high speed can be absorbed.

These and other aspects of the invention will be apparent from and elucidated with reference to the embodiments described hereinafter.

Description of the drawings:

The novel structure and further objects and advantages will be better understood from the following description taken in conjunction with the accompanying drawings, in which like reference characters identify like elements:

Fig. 1 is a schematic front view of a bladeless fan assembly according to an embodiment of the present invention;

FIG. 2 is a side schematic view of the bladeless fan assembly shown in FIG. 1;

3 FIG. 3 3 3 is 3 a 3 schematic 3 cross 3- 3 sectional 3 view 3 of 3 the 3 bladeless 3 fan 3 assembly 3 shown 3 in 3 FIG. 3 2 3, 3 taken 3 along 3 line 3 A 3- 3 A 3; 3

FIG. 4 is a schematic cross-sectional view of the bladeless fan assembly shown in FIG. 1 taken along line B-B;

FIG. 5 is a schematic cross-sectional view of the bladeless fan assembly shown in FIG. 1, taken along the line C-C, similar to FIG. 4, except for the difference in the position of the fan head top section;

FIG. 6 is a perspective view of a fan head of the bladeless fan assembly of FIG. 1;

FIG. 7 is an exploded perspective view of the fan head of FIG. 6;

FIG. 8 is a rear side schematic view of a fan head cover of the fan head of FIG. 7;

Figure 9 is a schematic cross-sectional view of the fan head of figure 6 taken along line D-D, which corresponds in cross-sectional configuration to the fan head of figure 4, except that it is shown in perspective;

FIG. 10 is a schematic, fragmentary, pictorial illustration of the bladeless fan assembly of FIG. 5, illustrating the configuration of the outer airflow channel and the peripheral airflow directing cavity;

FIG. 11 is a schematic partial structural view of the bladeless fan assembly shown in FIG. 5, illustrating the configuration of the inner airflow channel and the inner airflow directing cavity;

FIG. 12 is a perspective view of a muffler chamber assembly of the bladeless fan assembly of FIG. 4;

FIG. 13 is a schematic perspective view of the muffling chamber apparatus of FIG. 12 with the upper cover of the muffling chamber removed;

FIG. 14 is a schematic perspective view of the muffling chamber apparatus of FIG. 12 with the upper muffling chamber cover and the muffling chamber support removed;

Fig. 15 is a schematic perspective view of the sound-deadening chamber member and the sound-absorbing cotton attached thereto of the sound-deadening chamber device shown in fig. 14.

The specific implementation mode is as follows:

The present invention will be described in detail with reference to the accompanying drawings. However, it is to be understood that the disclosed embodiments are merely exemplary of the invention, which may be embodied in various forms. Therefore, specific details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present invention in virtually any appropriately detailed manner.

In this document, the directions used to explain the structure and/or actions of the various parts of the disclosed embodiments, such as "upper", "lower", "outer", "inner", etc., are not absolute, but relative. These representations are suitable when the various parts of the disclosed embodiments are located in the positions shown in the figures, and if the position or frame of reference of the disclosed embodiments is changed, they are also changed according to the change in the position or frame of reference of the disclosed embodiments. In addition, "connection" as referred to herein, refers to a wide range of connections, including screw-on detachable connections, electrical connections, adhesive connections, ultrasonic welding, and the like; the term "through" means that air can smoothly pass through.

As shown in fig. 1 to 9, the bladeless fan device according to one embodiment of the present invention includes a chassis 1, a base 3, and a fan head 5. As shown in fig. 1 and 2, the chassis 1 is arranged for placement on a work surface, such as a floor or other surface. As shown in fig. 3 to 5, a base 3 is mounted on the chassis 1, the aerodynamic device 2 is installed in the base 3, and the base 3 is further provided with a bottom intake opening 30 and an upper intake opening 32. As shown in fig. 1, 3 and 6 to 9, the fan head 5 is provided with a central through cavity 50 and a plurality of peripheral through cavities 52 which are located at the periphery of the central through cavity 50 and are uniformly distributed along the circumferential direction; the interior of the fan head 5 is provided with an inner air flow channel 51 positioned between the central through cavity 50 and the plurality of peripheral through cavities 52, an outer air flow channel 53 positioned at the periphery of the plurality of peripheral through cavities 52, and an intermediate air flow channel 55 positioned between two adjacent peripheral through cavities 52; the inner air flow path 51 and the outer air flow path 53 are communicated by means of the intermediate air flow paths 55 to together constitute an integral air flow path communicating with the upper air outlet 32.

As shown in fig. 6 and 9, the fan head 5 is further provided at the front side thereof with a plurality of air outlets 54 distributed along the respective air flow passages, and the respective through cavities are further provided with a plurality of outside air inlets 56 communicated with the entire air flow passage, so that the outside air in the respective through cavities can be sucked into the entire air flow passage through the outside air inlets 56, and the sucked outside air can be ejected through the air outlets 54 together with the air flow in the entire air flow passage.

As shown in fig. 6 to 9 and referring to fig. 1 to 5, the fan head 5 includes a fan head base 41, a fan head cover 43 adapted to the fan head base 41, a first air guide cover assembly including a plurality of first air guide covers 45, and a second air guide cover 47. As best shown in fig. 9 with reference to fig. 7, the fan head base 41 and fan head cover 43 are configured to collectively define a central through cavity 50, a peripheral through cavity 52, and an integral airflow passage when assembled together; the first and second air deflectors 45 and 47 are fixed on the fan head cover 43 and are accommodated in the overall airflow channel, wherein the number of the first air deflectors 45 corresponds to the number of the peripheral through cavities 52, for example, in the present embodiment, the number of the first air deflectors is 3, each first air deflector 45 is sleeved on the periphery of a corresponding peripheral through cavity 52, and the second air deflector 47 is sleeved on the periphery of the central through cavity 50, so that the first air deflectors 45 and the second air deflectors 47 can guide the airflow in the overall airflow channel to be ejected from the air outlet 54.

As best shown in fig. 7 and 8, the fan head base 41 includes a base body 410 having a housing wall 412, a central through cavity base 414 extending forward on the base body 410, and a plurality of peripheral through cavity bases 416 extending forward on the periphery of the central through cavity base 414 and uniformly distributed in the circumferential direction; the fan head cover 43 is mounted on the front side of the fan head base 41 (refer to fig. 6 and 9), and the fan head cover 43 includes a cover body 430, a central through-cavity cover 434 protruding rearward on the cover body 430, and a plurality of peripheral through-cavity covers 436 protruding rearward on the periphery of the central through-cavity cover 434 and uniformly distributed in the circumferential direction (see fig. 8). As best shown in fig. 9 and with reference to fig. 5, the center through cavity cover 434 interfaces with the center through cavity seat 414, which together form the center through cavity wall 44 of the center through cavity 50 to form the center through cavity 50 therein; the peripheral through cavity cover 436 and the peripheral through cavity seat 416 are butted together to form a peripheral through cavity wall 46 (see fig. 5) of the peripheral through cavity 52, thereby forming the peripheral through cavity 52 therein, and an inner side wall 461 of the peripheral through cavity wall 46 and the central through cavity wall 44 together form an inner air flow passage 51, and an outer side wall 463 of the peripheral through cavity wall 46 and the housing wall 412 of the fan head seat 41 together form an outer air flow passage 53.

As shown in fig. 7 and 8 and referring to fig. 4, it should be noted that when the fan head base 41 is abutted (i.e. face-to-face connected) with the fan head cover 43, the positioning hole 415 on the fan head base 41 is abutted with the positioning post 435 on the fan head cover 43; when the first air guide hoods 45 are connected with each other to form a first air guide hood assembly, two adjacent first air guide hoods 45 are positioned by the connecting lug 457 arranged on one side of each first air guide hood 45, and when the first air guide hoods 45 are connected to the fan head cover 43, the connecting lugs 457 are butted with the lug columns 437 arranged on the fan head cover 43; when the second pod 47 (in this embodiment, a cylindrical case) is connected to the fan case 43, the connection 478 of the second pod 47 is abutted against the ear post 438 provided on the fan case 43.

As shown in fig. 7 and 9, and referring to fig. 10 and 11, the first pod 45 is formed in a fan shape, and has a front end fixed to the housing body 430 of the fan housing 43 and a rear end extending into the entire airflow passage; the front end of the second air guide sleeve 47 is fixed on the cover body 430 of the fan cover 43, and the rear end extends into the whole air flow channel. As shown in fig. 10, an outer cover wall 453 of the first dome 45 is located in the outer airflow passage 53, and forms a peripheral airflow guiding chamber 452 together with an outer side wall 463 of the peripheral through chamber wall 46, the peripheral airflow guiding chamber 452 communicates with the air outlet 54 (the air outlets are both provided on the front side of the fan cover 43), and an outer air inlet 56 is provided on the outer side wall 463 of the peripheral through chamber wall 46, so that the airflow in the outer airflow passage 53 can enter the peripheral airflow guiding chamber 452 along the rear end of the outer cover wall 453 and be ejected from the air outlet 54 together with the outside air sucked through the outer air inlet 56. As shown in fig. 11, the inner cover wall 451 of the first dome 45 and the cover wall 471 of the second dome 47 are located in the inner airflow channel 51, and together form an inner airflow channel 474 communicating with the upper air outlet 32 of the base 3, and an inner airflow guiding chamber 472 communicating with the air outlet 54 is formed between the inner airflow channel 474 and the inner airflow channel 51. Further, a guide gap is formed between the free end 455 of the inner cover wall 451 of the first guide cover 45 and the free end 475 of the cover wall 471 of the second guide cover 47 as a rear end opening 476 of the inner airflow channel 474, and the outer air inlet 56 is formed in both the inner wall 461 peripherally penetrating the cavity wall 46 and the central penetrating cavity wall 44, so that the airflow from the upper air inlet 32 of the base 3 can enter the inner airflow guiding cavity 472 from the inner airflow channel 474 through the guide gap (i.e., the rear end opening 476 of the inner airflow channel 474) and be ejected from the air outlet 54 together with the outside air sucked through the outer air inlet 56.

It should be noted that, as clearly shown in fig. 10 and 11, in the present embodiment, the cross-sectional shape of the inner airflow channel 474 substantially corresponds to the cross-sectional shape of the aircraft airfoil numbered NACA23021, that is, the cross-sections of the inner shroud wall 451 of the first fairing 45 and the shroud wall 471 of the second fairing 47 forming the inner airflow channel 474 enclose a shape similar to the aircraft airfoil numbered NACA 23021; the cross-sectional shape of the inner airflow channel 51 is substantially rectangular, i.e. the shape enclosed by the cross-section of the inner sidewall 461 of the peripheral through chamber wall 46 and the central through chamber wall 44 (see fig. 5) is substantially rectangular; the cross-sectional shape of cowl wall 453 of first fairing 45 positioned within outer airflow channel 53 substantially conforms to the cross-sectional shape of one side airfoil of the NACA23021 aircraft airfoil. It should be understood that the term "uniform cross-sectional shape" does not mean that the dimensions are the same but means that the shapes (ratios of the various dimensions) are substantially the same.

Referring again to fig. 10 and 11 and as shown in fig. 9, the external air intakes 56 in the central through cavity wall 44 are defined by intermittent openings reserved between the central through cavity cover 434 and the central through cavity seat 414, and the external air intakes 56 in the peripheral through cavity wall 46 are defined by intermittent openings reserved between the peripheral through cavity cover 436 and the peripheral through cavity seat 416.

As shown in fig. 3, 7 and 9, an inverted V-shaped partition plate 48 is disposed in the fan head 5 corresponding to the upper air inlet 32 of the base 3, the inverted-V partition 48 is provided to divide the air flow from the upper air outlet 32 of the susceptor 3, so that the divided air flow enters the entire air flow passage three ways, i.e., from the left and right sides into the outer airflow passage 53 and from the middle into the intermediate airflow passage 55, respectively (the airflow direction is shown by arrows in fig. 3, specifically, in the present embodiment, as clearly shown in fig. 7, the inverted V-shaped partition 48 is fixed on the inner side of the casing wall 412 of the fan head base 41 near the upper air inlet 32 of the base 3 (see fig. 3), further, a partition plate 49 is further provided in the intermediate airflow passage 55 corresponding to the inverted V-shaped partition plate 48, and the partition plate 49 serves to divide the airflow entering through the intermediate airflow passage 55 into two paths into the inner airflow passage 51.

In addition, as shown in fig. 4, an air heater 33 is further disposed in the base 3 below the upper air inlet 32 and above the aerodynamic device 2, so as to heat the air flow when necessary, so that the bladeless fan device can meet the requirement of hot air outlet.

As shown in fig. 3 to 5, the aerodynamic device 2 includes a diffuser 21a fixed on the base 3, an impeller housing 21b located below the diffuser 21a, a motor bracket 21h fixed on the impeller housing 21b, a motor 21g fixed on the motor bracket 21h, a cowling 21f fixed on the motor bracket 21h, an impeller 21d fixed on the motor 21g, an impeller inlet housing 21c fixed on the impeller housing 21b and located below the impeller 21d, a wind collector 21e located below the impeller housing 21b and hermetically connected to the impeller inlet housing 21c through a rubber ring 24 and closely contacted to the inner wall of the housing of the base 3, and a silencing chamber device 22, wherein the silencing chamber device 22 is located between the diffuser 21a and the wind collector 21e, and is also installed on, i.e. supported on the wind collector 21e through rubber rings 24 (e.g. three, distributed along the circumferential direction), a rubber ring 26 is also installed between the muffling chamber device 22 and the impeller housing 21b for absorbing vibration, and is elastically and tightly connected with the inner wall of the housing of the base 3 through rubber absorbing plugs 253 which are distributed at intervals outside the muffling chamber device 22, and the muffling chamber device 22 is arranged to surround a part of the diffuser 21a and a part of the impeller air inlet housing 21 c.

As shown in fig. 12 to 15, the muffling chamber apparatus 22 includes a muffling chamber support 25, a muffling chamber member 27 mounted on an inner sidewall of the muffling chamber support 25, and a muffling chamber upper cover 29 located above the muffling chamber support 25 and the muffling chamber member 27, wherein the muffling chamber member 27 is formed by connecting a plurality of circumferentially distributed perforated plates 270 to each other, each perforated plate 270 forms a helmholtz resonance chamber between the muffling chamber support 25 and the muffling chamber upper cover 29, each perforated plate 270 includes a plurality of perforated portions having different arrangements in terms of hole diameter, perforation rate, and hole thickness, in this embodiment, an upper perforated portion 272, a middle perforated portion 274, and a lower perforated portion 276, to divide the helmholtz resonance chamber into sub-resonance chambers 275 having different frequencies, and in this embodiment, 3 sub-resonance chambers 275 are correspondingly formed, for example, the uppermost sub-resonance chamber 275 absorbs low-frequency noise, the middle sub-resonance chamber 275 absorbs mid-frequency noise and the lowest sub-resonance chamber 275 absorbs high-frequency noise, sound-absorbing cotton 28 is installed on the perforated plate 270 at a position corresponding to a position between two adjacent sub-resonance chambers 275, and the sound-absorbing chamber bracket 25 is further provided with an annular cavity 277 located outside the helmholtz resonance chamber, and the annular cavity 277 is filled with sheet-like sound-absorbing cotton (not shown) to further improve the sound-absorbing effect. In addition, a plurality of the damping rubber plugs 253 are installed on the outer side wall of the sound attenuation chamber bracket 25, and the damping rubber plugs 253 are uniformly distributed along the circumferential direction, so that the damping rubber plugs 253 can be installed in a pressing manner with the inner wall of the housing of the base 3 to absorb the vibration noise generated when the motor 21g rotates at a high speed.

In addition, it should be noted that the bottom air inlet 30 on the base 3 is disposed on the air inlet part 34 of the base 3 below the air collector 21e, and the central area of the top of the air inlet part 34 is provided with a certain thickness of sound deadening cotton (not shown) to attenuate the noise from the bottom air inlet 30.

As shown in fig. 1 and 2, in the present embodiment, the chassis 1 has a hollow structure of a disk shape, and a control panel, a key, a swing head member, a display member, and the like are built in or partially built in as necessary, and the diameter thereof is approximately between 250 MM and 320 MM; the base 3 is arranged above the chassis 1, a cylindrical shell 13 with the same diameter as the top circle of the truncated cone of the chassis 1 can be arranged between the base 3 and the chassis 1 to connect and fix the base 3, and the height of the cylindrical shell 13 is approximately between 10 and 30 mm. The base 3 is composed of two parts, the upper part is a duckbill-shaped part 35, the lower part is a cylindrical part 37, the two parts are connected by a screw or ultrasonic welding mode to form a complete base shell, wherein the diameter of the cylindrical part 37 is approximately between 200 MM and 300 MM; the base 3 is coaxial Z with the chassis 1; the aerodynamic device 2 inside the base 3 enables air suction, compression and discharge; the muffling chamber means 22 can reduce dynamic noise.

It will be understood that in the present embodiment, the fan head 5 is circular, with a thickness extending in the direction of the Y axis, which is approximately between 20 and 30% of the diameter of the cylindrical portion 37 of the base 3; the fan head 5 has a maximum dimension along the X-axis direction, i.e. the maximum dimension (i.e. the diameter) of the fan head 5 is approximately between 200 MM and 400 MM; the X-axis is orthogonal to the Z-axis and the Y-axis, respectively, and intersects a point located at the geometric center of the fan head 5. In the present embodiment, the first pod 45 and the peripheral through-cavity 52 are each formed in a fan shape, and the number of the first pod 45 and the peripheral through-cavity 52 is three, as shown in fig. 7 and 3, respectively. Of course, the number of first fairings 45 and peripheral through cavities 52 may vary between 2 and 6 in other embodiments.

The center through cavity wall 44 of the center through cavity 50 and the peripheral through cavity wall 46 of the peripheral through cavity 52, that is, the outer walls of the center through cavity cover 434 and the center through cavity seat 414, and the outer walls of the peripheral through cavity cover 436 and the peripheral through cavity seat 416, are each formed to be thin with a thickness of approximately 1.5 to 3.5 mm; all of the outlets 54 form nozzles for ejecting air, i.e., air, toward the outside, and the ejected air is entrained by the air passing through the central through cavity 50 and the outer inlets 56 of the peripheral through cavities 52 and mixed to form a jet of air as it exits the overall airflow path and flows downstream, forming a continuous and smooth natural-like wind.

While the invention has been described with reference to the above embodiments, it will be understood by those skilled in the art that various changes and modifications may be made to the above-described arrangements without departing from the spirit of the invention, including combinations of features disclosed herein either individually or in any claim herein, and also including other combinations of features which are obvious from the above description. These variants and/or combinations fall within the technical field related to the new model and fall within the scope of protection of the new model claims.

Claims (10)

1. A bladeless fan apparatus, comprising:

A chassis (1) arranged for placement on a work surface;

The base (3) is arranged on the chassis (1), an air power device (2) is arranged in the base (3), and the base (3) is also provided with a bottom air inlet (30) and an upper air outlet (32);

The fan head (5) is provided with a central through cavity (50) and a plurality of peripheral through cavities (52) which are positioned at the periphery of the central through cavity (50) and are uniformly distributed along the circumferential direction, an inner airflow channel (51) positioned between the central through cavity (50) and the peripheral through cavities (52), an outer airflow channel (53) positioned at the periphery of the peripheral through cavities and a middle airflow channel (55) positioned between two adjacent peripheral through cavities (52) are arranged inside the fan head (5), and the inner airflow channel (51) and the outer airflow channel (53) are communicated by means of the middle airflow channels (55) to jointly form an integral airflow channel communicated with the upper air inlet (32);

The front side of the fan head (5) is also provided with a plurality of air outlets (54) distributed along the air flow channels, and each through cavity is also provided with a plurality of external air inlets (56) communicated with the whole air flow channel, so that external air in each through cavity can be sucked into the whole air flow channel through the external air inlets (56) and can be ejected out through the air outlets (54) along with air flow in the whole air flow channel.

2. The bladeless fan arrangement according to claim 1, wherein the fan head (5) comprises a fan head base (41), a fan head cover (43) adapted to the fan head base (41), a first air guide sleeve assembly comprising a plurality of first air guide sleeves (45), and a second air guide sleeve (47), wherein the fan head base (41) and the fan head cover (43) are configured to jointly constitute the central through cavity (50), the peripheral through cavity (52), the overall air flow passage when assembled together, the plurality of first air guide sleeves (45) and the second air guide sleeves (47) being fixed to the fan head cover (43) and received in the overall air flow passage, wherein the number of the plurality of first air guide sleeves (45) corresponds to the number of the plurality of peripheral through cavities (52), each first air guide sleeve (45) being located at the periphery of a corresponding one of the peripheral through cavities (52), and the second air guide sleeve (47) is sleeved on the periphery of the central through cavity (50), so that the first air guide sleeve (45) and the second air guide sleeve (47) can guide the air flow in the integral air flow channel to be sprayed out from the air outlet (54).

3. The bladeless fan apparatus of claim 2, wherein the bladeless fan apparatus is configured to operate in a fan mode that is substantially free of air

The fan head seat (41) comprises a seat body (410) with a shell wall (412), a central through cavity seat (414) located on the seat body (410) and extending forwards, and a plurality of peripheral through cavity seats (416) extending forwards on the periphery of the central through cavity seat (414) and uniformly distributed along the circumferential direction;

The fan head cover (43) is arranged on the front side of the fan head seat (41), the fan head cover (43) comprises a cover body (430), a central through cavity cover (434) which is positioned on the cover body (430) and extends backwards, and a plurality of peripheral through cavity covers (436) which extend backwards on the periphery of the central through cavity cover (434) and are uniformly distributed along the circumferential direction, wherein the central through cavity cover (434) and the central through cavity seat (414) are butted to form a central through cavity wall (44) of the central through cavity (50) so as to form the central through cavity (50) in the central through cavity, the peripheral through cavity cover (436) and the peripheral through cavity seat (416) are butted to form a peripheral through cavity wall (46) of the peripheral through cavity (52) so as to form the peripheral through cavity (52) in the peripheral through cavity wall, and the inner air flow channel is formed by the inner side wall (461) of the peripheral through cavity (46) and the central through cavity wall (44), the outer side wall (463) of the peripheral through cavity wall (46) and the shell wall (412) of the fan head seat (41) jointly form the outer air flow channel.

4. The bladeless fan apparatus of claim 3, wherein:

The front end of the first air guide sleeve (45) is fixed on the cover body (430) of the fan cover (43), and the rear end of the first air guide sleeve extends into the integral airflow channel;

The front end of the second air guide sleeve (47) is fixed on the cover body (430) of the fan cover (43), and the rear end of the second air guide sleeve extends into the integral airflow channel;

Wherein, the first air guide sleeve (45) is in fan shape, the outer sleeve wall (453) of the first air guide sleeve is positioned in the outer air flow channel (53) and forms a peripheral air flow guide cavity (452) together with the outer side wall (463) of the peripheral through cavity wall (46), the peripheral air flow guide cavity (452) is communicated with the air outlet, and the outer side wall (463) of the peripheral through cavity wall (46) is provided with the outer air inlet (56), so that the air flow in the outer air flow channel (53) can enter the peripheral air flow guide cavity (452) along the rear end of the outer sleeve wall (453) and can be sprayed out of the air outlet (54) along with the outer air sucked in by the outer air inlet (56); and the number of the first and second electrodes,

Wherein the inner shroud wall (451) of the first air guide shroud (45) and the shroud wall (471) of the second air guide shroud (47) are positioned in the inner airflow passage (51) to constitute an inner airflow passage (474) communicating with the upper air outlet (32), an inner airflow guide chamber (472) communicating with the air outlet (54) is formed between the inner airflow passage (474) and the inner airflow passage (51), and a flow guide gap serving as a rear end opening (476) of the inner airflow passage (474) is provided between a free end (455) of the inner shroud wall (451) of the first air guide shroud (45) and a free end (475) of the shroud wall (471) of the second air guide shroud (47), and the outer air inlet (56) is provided on both the inner sidewall (461) of the peripheral through-cavity wall (46) and the central through-cavity wall (44), so that the airflow from the upper air outlet (32) of the base (3) can flow from the inner airflow passage (474) Enters the inner airflow guiding cavity (472) through the flow guiding gap and is ejected out of the air outlet (54) along with the external air sucked through the external air inlet (56).

5. The bladeless fan unit according to claim 4, wherein the cross-sectional shape of the inner airflow channel (474) is identical to the cross-sectional shape of a NACA23021 airplane wing profile, and the cross-sectional shape of the inner airflow channel (51) is rectangular; the cross-sectional shape of the shroud wall (453) of the first fairing (45) conforms to the cross-sectional shape of one side airfoil of the NACA23021 aircraft airfoil.

6. Bladeless fan device according to claim 5, wherein the external air intakes (56) on the central through cavity wall (44) are constituted by intermittent openings reserved between the central through cavity shield (434) and the central through cavity seat (414), and the external air intakes (56) on the peripheral through cavity wall (46) are constituted by intermittent openings reserved between the peripheral through cavity shield (436) and the peripheral through cavity seat (416).

7. The bladeless fan unit according to claim 1, wherein an inverted V-shaped partition (48) is disposed in the fan head (5) corresponding to the upper air inlet (32) of the base (3), and the inverted V-shaped partition (48) is configured to split the air flow from the upper air inlet (32), so that the split air flow enters the overall air flow channel via three paths.

8. Bladeless fan device according to claim 7, characterized in that an air heater (33) is also provided in the base (3) below the upper air outlet (32) and above the aerodynamic device (2).

9. The bladeless fan device according to any one of claims 1 to 8, wherein the aerodynamic device comprises a diffuser (21 a) fixed on the base (3), an impeller housing (21 b) located below the diffuser (21 a), a motor bracket (21 h) fixed on the impeller housing (21 b), a motor (21 g) fixed on the motor bracket (21 h), a fairing (21 f) fixed on the motor bracket (21 h), an impeller (21 d) fixed on the motor (21 g), an impeller air inlet housing (21 c) fixed on the impeller housing (21 b) and located below the impeller (21 d), an air collector (21 e) located below the impeller housing (21 b) and hermetically connected with the impeller air inlet housing (21 c) through a rubber ring (24) and closely contacted with the inner wall of the housing of the base (3), and a fan guide (21 e), Silencing cavity device (22), wherein, silencing cavity device (22) are located between diffuser (21 a) and wind collector (21 e), and with the help of rubber circle (24) install on wind collector (21 e) to pass through interval distribution with the shells inner wall of base (3) and the shock attenuation rubber buffer (253) elasticity zonulae occludens on silencing cavity device (22) shell, and, silencing cavity device (22) set up into enclosure portion diffuser (21 a) and part impeller air intake shell (21 c).

10. The bladeless fan unit according to claim 9, wherein the sound-deadening chamber device (22) comprises a sound-deadening chamber holder (25), a sound-deadening chamber member (27) mounted on an inner sidewall of the sound-deadening chamber holder (25), and a sound-deadening chamber upper cover (29) located above the sound-deadening chamber holder (25) and the sound-deadening chamber member (27), wherein the sound-deadening chamber member (27) is formed by connecting a plurality of circumferentially distributed perforated plates (270) to each other, each perforated plate (270) forms a Helmholtz resonance chamber between the sound-deadening chamber holder (25) and the sound-deadening chamber upper cover (29), each perforated plate (270) comprises a plurality of perforated portions having different arrangements in terms of aperture, perforation rate, and aperture thickness to divide the Helmholtz resonance chamber into sub-resonance chambers (275) of different frequencies, and cotton (28) is provided on the perforated plate (270) at a position corresponding to between two adjacent sub-sound-deadening chambers (275), and this amortization chamber support (25) still is provided with and is located this helmholtz resonator outside annular cavity (277), and this annular cavity (277) is built-in to be equipped with slice amortization cotton, and is equipped with on the lateral wall of this amortization chamber support (25) shock attenuation rubber buffer (253).

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