Sound absorption structure, air outlet head and air treatment equipment

Abstract

The invention discloses a sound absorption structure, an air outlet head and air treatment equipment, and relates to the technical field of life electric appliances, the sound absorption structure is applied to the air treatment equipment, an air duct is arranged in the air treatment equipment, and the sound absorption structure comprises a plurality of sound absorption channels and a plurality of sound absorption holes correspondingly communicating with the sound absorption channels; the sound absorption structure is communicated with the air channel through the sound absorption holes, the sound absorption channels are not communicated with one another, and the total lengths of at least two sound absorption channels are different. According to the technical scheme, the sound absorption structure can have the noise reduction characteristic that the sound absorption frequency and the sound absorption coefficient can be adjusted at will, and then noise of equipment applying the sound absorption structure is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of household appliances, in particular to a sound absorption structure, an air outlet head and an air treatment device. BACKGROUND

[0002] The existing air treatment devices include bladeless fans, air purifiers, humidifiers and the like, which mainly improve the surrounding air quality and improve human comfort by treating the air in the surrounding environment. Generally, the air treatment device uses a power system to suck air into the device for treatment, and then discharges the treated air out of the device. In this process, the noise generated will propagate along the internal passage of the device and radiate to the external environment, affecting the user's experience. SUMMARY

[0003] The main purpose of the present application is to provide a sound absorption structure, an air outlet head and an air treatment device, which aims to make the sound absorption structure have sound absorption frequency and sound absorption coefficient adjustable sound absorption characteristics, thereby reducing the noise of the device with the sound absorption structure.

[0004] To achieve the above purpose, the sound absorption structure according to the present application is applied to an air treatment device, the air treatment device is provided with an air duct, and the sound absorption structure comprises a plurality of sound absorption channels and a plurality of sound absorption holes corresponding to the sound absorption channels.

[0005] Among them, the sound absorption structure is connected to the air duct through the sound absorption hole, each sound absorption channel is not connected to each other, and the total length of at least two sound absorption channels is different.

[0006] In an embodiment, the sound absorption hole is arranged at one end of the sound absorption channel.

[0007] In an embodiment, at least part of the sound absorption channel comprises a first sound absorption section and a second sound absorption section, one end of the first sound absorption section is laterally connected to the second sound absorption section, and the other end is connected to the sound absorption hole.

[0008] In an embodiment, the total length L of the sound absorption channel and the wavelength λ of the sound absorption frequency corresponding to the sound absorption channel satisfy: L = λ / 4.

[0009] In an embodiment, the difference between the sound absorption frequencies of two adjacent sound absorption channels is δ, and 10Hz≤δ≤50Hz.

[0010] In an embodiment, the sound absorption hole is a square hole.

[0011] In an embodiment, the cross-sectional shape of the sound absorption channel is at least one of a rectangle, a triangle, a trapezoid, and a circle.

[0012] In an embodiment, the sound absorption structure further comprises a windproof sound transmission member covering the sound absorption hole.

[0013] In an embodiment, the windproof sound transmission member is configured as a non-woven fabric or a film structure.

[0014] In an embodiment, the sound absorption structure comprises at least one sound absorption layer, and a plurality of sound absorption channels are arranged in the sound absorption layer.

[0015] In an embodiment, the sound absorption structure comprises a first sound absorption layer and a second sound absorption layer arranged along the axial direction of the sound absorption hole, and the sound absorption hole comprises a first sound absorption hole communicating with a first sound absorption channel in the first sound absorption layer and a second sound absorption hole communicating with a second sound absorption channel in the second sound absorption layer.

[0016] The first sound absorption layer is located above the second sound absorption layer, the second sound absorption channel communicates with the second sound absorption hole through a butt channel penetrating the first sound absorption layer, and the butt channel and the first sound absorption channel are not in communication with each other.

[0017] The present application also provides an air outlet head, comprising:

[0018] a housing, an air inlet and an air outlet are formed in the housing, an air duct is formed between the air inlet and the air outlet, and a through hole is formed in the air duct wall of the air duct; and

[0019] The sound absorption structure as described above is connected to the air duct wall and butts the through hole through the sound absorption hole, and at least one of the air inlet and the air outlet is provided with the sound absorption structure.

[0020] In an embodiment, the sound absorption structure is provided with at least one;

[0021] The sound absorption structure is arranged in the air duct, or the sound absorption structure is arranged on the back side of the air duct.

[0022] In an embodiment, the air outlet is in the form of a slit, the sound absorption structure is arranged close to the air outlet, and / or the sound absorption hole is arranged close to the air outlet.

[0023] In an embodiment, the housing comprises an air inlet seat and two air outlet arms, the air inlet seat is provided with the air inlet at the bottom, and the front side of the air outlet arm is provided with the air outlet;

[0024] The opposite sides of the air inlet seat are respectively connected to the two air outlet arms, and the sound absorption structure is arranged on the air inlet seat and the air outlet arm.

[0025] In an embodiment, a limiting boss is arranged on the housing, and the limiting boss is used to assist the sound absorption hole of the sound absorption structure to communicate with the through hole of the air duct.

[0026] The application further provides an air treatment device, which comprises an air inlet base and an air outlet head as described above, and the air outlet head is arranged above the air inlet base.

[0027] In an embodiment, the air inlet base comprises a supporting base and an annular shell group arranged on the supporting base to form an air inlet cavity together with the supporting base, and the annular shell group is provided with an inlet and an outlet communicating with the air inlet cavity.

[0028] At least one of the supporting base and the annular shell group is provided with the sound absorption structure as described above, and the sound absorption holes of the sound absorption structure communicate with the air inlet cavity.

[0029] In an embodiment, a fan module is arranged between the air inlet base and the air outlet head, and the fan module is provided with the sound absorption structure as described above.

[0030] In an embodiment, the fan module comprises a casing, a fan is fixed in the casing, and a guide air passage is formed on the casing and arranged around the outer periphery of the fan, and the guide air passage communicates with the air inlet base and the air outlet head.

[0031] The side of the casing facing the air outlet head is provided with the sound absorption structure, and the sound absorption structure is arranged along the arrangement direction of the guide air passage.

[0032] In the technical scheme of the application, the air treatment device is provided with an air duct, and the sound absorption structure is applied to the air treatment device, so that the sound absorption structure communicates with the air duct through the sound absorption holes. In this way, the noise diffused along the air duct enters the sound absorption passage through the sound absorption holes and is absorbed and isolated under the action of the sound absorption passage, so as to achieve the purpose of noise optimization and improve the user experience.

[0033] Because the total lengths of the sound absorption passages are different, different noise frequencies can be eliminated. Specifically, the sound absorption passages in the sound absorption structure are not communicated with each other, and the total lengths of at least two sound absorption passages are different. In this way, the superposition of the sound absorption passages with different total lengths can realize the absorption and elimination of different narrowband frequencies, so as to achieve efficient elimination of wideband noise in a specific wideband, and further, help the sound absorption structure to have sound absorption frequency and sound absorption coefficient adjustable sound absorption characteristics, so as to meet the wideband noise reduction requirements of the device provided with the sound absorption structure. BRIEF DESCRIPTION OF DRAWINGS

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the structure of an embodiment of the air outlet of the present invention;

[0036] Figure 2 for Figure 1 A diagram illustrating the explosion that draws attention to itself.

[0037] Figure 3 for Figure 1 Schematic diagram of the sound-absorbing structure in the middle;

[0038] Figure 4 for Figure 3 Schematic diagram of the middle bottom shell;

[0039] Figure 5 This is a cross-sectional view of the air inlet base and the fan module in one embodiment of the air handling equipment of the present invention;

[0040] Figure 6 for Figure 5 Explosion diagram of the central air intake base;

[0041] Figure 7 for Figure 5 Schematic diagram of the structure of the central support base;

[0042] Figure 8 for Figure 7 A schematic diagram of the structure of the first sound-absorbing layer on the central support base;

[0043] Figure 9 for Figure 7 A schematic diagram of the structure of the second sound-absorbing layer on the central support base;

[0044] Figure 10 for Figure 5 Schematic diagram of the central support column;

[0045] Figure 11 for Figure 10 Front view of the central column body;

[0046] Figure 12 for Figure 10 Side view of the central column body;

[0047] Figure 13 for Figure 5 A schematic diagram of the structure of an embodiment of the medium-sized wind turbine module;

[0048] Figure 14 For Figure 13 Exploded view of the blower module;

[0049] Figure 15 For Figure 13 Sectional view of the blower module;

[0050] Figure 16 For Figure 13 Structural view of one embodiment of the cover body;

[0051] Figure 17 For Figure 13 Structural view of another embodiment of the cover body;

[0052] Figure 18 For Figure 13 Perspective view of still another embodiment of the cover body;

[0053] Figure 19 For Figure 13 Structural view of one embodiment of the turbulence structure, wherein the turbulence portion is in the shape of a triangular prism;

[0054] Figure 20 For Figure 19 Structural view of one embodiment of the turbulence portion, wherein the angle between the plate surface of the turbulence portion and the axis of the air guide passage is 15°;

[0055] Figure 21 For Figure 19 Structural view of another embodiment of the turbulence portion, wherein the angle between the plate surface of the turbulence portion and the axis of the air guide passage is 35°;

[0056] Figure 22 For Figure 13 Structural view of another embodiment of the turbulence structure, wherein the turbulence portion is in the shape of a quadrangular prism;

[0057] Figure 23 For Figure 22 Structural view of one embodiment of the turbulence portion, wherein the angle between the plate surface of the turbulence portion and the axis of the air guide passage is 23°;

[0058] Figure 24 For Figure 13 Structural view of still another embodiment of the turbulence structure, wherein two turbulence portions in the shape of a triangular prism are arranged on a connecting portion, and the angle between the plate surface of one turbulence portion and the axis of the air guide passage is 25°, and the angle between the plate surface of the other turbulence portion and the axis of the air guide passage is 15°;

[0059] Figure 25 For Figure 24 Structural view of one embodiment of the turbulence portion, wherein the two plate surfaces are arranged in a tapered manner in the extension direction of the connecting portion;

[0060] Figure 26 For Figure 24 Structure diagram of another embodiment of the spoiler, wherein the two plate surfaces are arranged in a diverging manner in the extension direction of the connecting portion;

[0061] Figure 27 For Figure 13 Structure diagram of another embodiment of the spoiler, wherein two trapezoidal spoilers are arranged on the connecting portion, and the two plate surfaces are parallel, and the included angle between the plate surface of the two spoilers and the axis of the air guide passage is 25°.

[0062] BRIEF DESCRIPTION OF THE DRAWINGS

[0063]

[0064]

[0065] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0066] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0067] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be internal connection of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0068] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, motion condition, etc. between the components in a certain specific posture (as shown in the drawings), if the specific posture changes, the directional indications will also change accordingly.

[0069] In addition, if the description of "first", "second" and the like is involved in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel schemes, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.

[0070] The present application provides an acoustic absorption structure 100.

[0071] Referring to Figures 1 to 18 In the embodiments of the present application, the acoustic absorption structure 100 includes a plurality of acoustic absorption channels 111 and a plurality of acoustic absorption holes 112 corresponding to the communication of the acoustic absorption channels 111; wherein each of the acoustic absorption channels 111 is not communicated with each other, and the total length of at least two of the acoustic absorption channels 111 is different, so as to improve the noise radiated outward by the device applied with the acoustic absorption structure 100, and further improve the user's experience.

[0072] In the technical scheme of the present application, the air handling equipment is provided with an air duct, and the acoustic absorption structure 100 is applied to the air handling equipment, so that the acoustic absorption structure 100 is communicated with the air duct through the acoustic absorption hole 112. In this way, the noise diffused along the air duct enters the acoustic absorption channel 111 through the acoustic absorption hole 112, and is absorbed and isolated under the action of the acoustic absorption channel 111, so as to achieve the purpose of noise optimization and improve the user's experience.

[0073] Because the total length of the acoustic absorption channel 111 is different, different noise frequencies can be correspondingly eliminated. Specifically, each of the acoustic absorption channels 111 in the acoustic absorption structure 100 is not communicated with each other, and the total length of at least two of the acoustic absorption channels 111 is different. In this way, by using the superposition of acoustic absorption channels 111 with different total lengths, the absorption and elimination of different narrowband frequencies can be realized, so as to achieve efficient elimination of wideband noise in a specific wideband, and further, to help the acoustic absorption structure 100 have sound absorption frequency and sound absorption coefficient adjustable sound absorption characteristics, meet the wideband noise reduction demand of the device applied with the acoustic absorption structure 100.

[0074] Optionally, in an embodiment, the sound absorption hole 112 is arranged at one end of the sound absorption channel 111, that is, the noise entering the sound absorption channel 111 through the sound absorption hole 112 can be radiated in a certain direction, improving the noise reduction effect of the sound absorption channel 111, and reducing the risk of noise generated by airflow at the sound absorption hole 112, avoiding the deviation of the corresponding narrowband frequency caused by the sound absorption hole 112 arranged at the middle or position other than the end of the sound absorption channel 111.

[0075] Further, limited by the specific size of the sound absorption structure 100 and the size of the space where the sound absorption structure 100 is installed, in an embodiment, at least part of the sound absorption channel 111 includes a first sound absorption section 161 and a second sound absorption section 162, one end of the first sound absorption section 161 is in lateral communication with the second sound absorption section 162, and the other end is in communication with the sound absorption hole 112. It can be understood that when the size of the sound absorption structure 100 is constant, the total length of the sound absorption channel 111 is ensured by changing the folding times of the sound absorption channel 111, and the tortuosity or turning number of the sound absorption channel 111 is increased, so as to control the sound radiation impedance of the sound absorption structure 100, and then realize the control of the sound absorption frequency, sound absorption coefficient or transmission loss, so as to achieve efficient elimination of noise of specific frequency. The lateral direction can be parallel to the extension direction of the air duct wall connected with the sound absorption structure 100, or it can be the vertical direction of the air duct wall. Of course, in other embodiments, part of the sound absorption channel 111 can only include the first sound absorption section 161; or part of the sound absorption channel 111 includes the first sound absorption section 161, the second sound absorption section 162 and the third sound absorption section 163.

[0076] More specifically, as shown in Figure 5 , Figures 8 to 9 , on the basis that each sound absorption channel 111 is not in communication with each other, one sound absorption channel 111 can be spliced with the adjacent sound absorption channel 111 in the sound absorption structure 100, so as to fully and reasonably utilize the internal space of the sound absorption structure 100, which is helpful to reduce the overall size of the sound absorption structure 100 and realize the miniaturization of the sound absorption structure 100.

[0077] Since the total length of the sound absorption channel 111 is highly related to the peak frequency of the sound absorption, the total length L of the sound absorption channel 111 and the wavelength λ corresponding to the sound absorption frequency of the sound absorption channel 111 approximately satisfy: L = λ / 4, that is, on the basis of not affecting the sound absorption effect, L can be λ / 4, or greater than λ / 4, or less than λ / 4; wherein, since the wavelength is large at low frequency, the elimination of low frequency noise can be ensured by multiple folding of the sound absorption channel 111 in the sound absorption structure 100, while the folding times of the sound absorption channel 111 in the sound absorption structure 100 are reduced for high frequency. Thus, by arranging sound absorption channels 111 with different total lengths in the effective space to ensure efficient elimination of noise of specific frequency, the sound absorption effect of the sound absorption structure 100 is enhanced.

[0078] Optionally, in an embodiment, the total length of the sound absorption channel 111 is equal to, but not limited to, λ / 5, λ / 4, λ / 3, for example, λ / 5≤L≤λ / 3, so as to improve or adjust the sound absorption effect of the sound absorption structure 100 on different sound absorption frequencies. Specifically, in the present embodiment, the total length of the sound absorption channel 111 satisfies: L=λ / 4, which, in cooperation with the device provided with the sound absorption structure 100, can reduce the main peak value in the original noise spectrum curve to a certain extent, so as to have a better sound absorption and noise reduction effect and be conducive to improving the user experience.

[0079] Further, in order to reliably absorb and eliminate the wideband noise in a specific wideband, in an embodiment, the difference between the sound absorption frequencies of the two adjacent sound absorption channels 111 is δ, and 10Hz≤δ≤50Hz, which helps to enhance the sound absorption effect of the sound absorption structure 100; by limiting the difference δ to be between 10Hz and 50Hz, the total length difference between the sound absorption channels 111 is maintained within a small range, so as to realize efficient sound absorption of the sound absorption structure 100, and also to ensure that the sound absorption effect of a wider frequency range is achieved within a reasonable range, reduce the possibility of not being able to absorb the local frequency band in a specific wideband, and improve the wideband sound absorption performance of the sound absorption structure 100. Further, the difference between the sound absorption frequencies of the two adjacent sound absorption channels 111 is δ, and 20Hz≤δ≤30Hz.

[0080] In addition, when the flow rate of the airflow is large, in order to avoid the airflow from forming new fluid noise near the sound absorption hole 112 and in the sound absorption channel 111, in an embodiment, the sound absorption structure 100 further comprises a windproof sound transmission member, which covers the sound absorption hole 112, so as to prevent the airflow from entering the sound absorption channel 111 and reliably suppress the generation of additional fluid noise, while ensuring the reliable absorption of noise by the sound absorption structure 100.

[0081] Specifically, the windproof sound transmission member is configured as a non-woven fabric or a film structure.

[0082] Optionally, in an embodiment, the cross-sectional shape of the sound absorption channel 111 is at least one of a rectangle, a triangle, a trapezoid, and a circle, and can also be any other shape.

[0083] Optionally, in an embodiment, the sound absorption structure 100 comprises at least one sound absorption layer, and a plurality of sound absorption channels 111 are arranged in the sound absorption layer, so as to improve the perforation rate of the sound absorption structure 100 and further realize efficient elimination of wideband noise.

[0084] Specifically, in an embodiment, the sound absorption structure 100 comprises a first sound absorption layer 121 and a second sound absorption layer 131 arranged along the axial direction of the sound absorption hole 112, the sound absorption hole 112 comprises a first sound absorption hole 123 communicating with a first sound absorption passage 122 in the first sound absorption layer 121 and a second sound absorption hole 133 communicating with a second sound absorption passage 132 in the second sound absorption layer 131; the first sound absorption layer 121 is located above the second sound absorption layer 131, the second sound absorption passage 132 communicates with the second sound absorption hole 133 through a butt joint passage 15 penetrating the first sound absorption layer 121, and the butt joint passage 15 and the first sound absorption passage 122 are not in communication with each other.

[0085] As can be understood, as shown in Figure 5 、 Figure 8 and Figure 9 , a plurality of first sound absorption passages 122 not in communication with each other are arranged on the first sound absorption layer 121, wherein, in order to meet the absorption of different narrowband frequency noises, the total length of at least part of the sound absorption passages 111 is different, and further, part of the first sound absorption passages 122 comprises a first sound absorption section 161, part of the first sound absorption passages 122 comprises a first sound absorption section 161 and a second sound absorption section 162, and on the basis of limited size of the sound absorption structure 100, each first sound absorption passage 122 can be arranged in a spliced manner, and further, the sound absorption structure 100 has better sound absorption characteristics and smaller volume.

[0086] In order to further improve the sound absorption characteristics of the sound absorption structure 100, the sound absorption structure 100 further comprises a second sound absorption layer 131, the second sound absorption layer 131 is arranged below the first sound absorption layer 121 along the axial direction of the sound absorption hole 112, and the first sound absorption hole 123 corresponding to the first sound absorption passage 122 and the second sound absorption hole 133 corresponding to the second sound absorption passage 132 are located on the same surface, which is the top surface of the first sound absorption layer 121, so as to abut the through hole on the air duct wall and jointly reduce the noise of the airflow in the air duct; therefore, the butt joint passage 15 penetrates the first sound absorption layer 121, realizing the communication of the second sound absorption passage 132 and the second sound absorption hole 133, and the butt joint passage 15 and the first sound absorption passage 122 do not interfere with each other, so as to guarantee the sound absorption effect of the second sound absorption passage 132; specifically, the top surface of the first sound absorption layer 121 has two opposite sides, the first sound absorption hole 123 and the second sound absorption hole 133 can be arranged on the two opposite sides, of course, the second sound absorption hole 133 can also be located in the central region of the top surface, which is not limited. In other embodiments, under the permission of the specific shape of the sound absorption structure 100, the sound absorption passage 111 extends along the axial direction of the sound absorption hole 112, and in order to meet the absorption of specific frequency noises by the sound absorption passage 111, two adjacent sound absorption passages 111 can be communicated into one sound absorption passage 111.

[0087] Therefore, compared with a single sound-absorbing layer and the number of sound-absorbing holes 112 provided, by providing multiple sound-absorbing layers, the number of sound-absorbing channels 111 and the number of sound-absorbing holes 112 can be increased, so that a larger perforation rate can be achieved, and more efficient sound absorption can be realized, and the sound absorption performance can be improved.

[0088] The application provides an air outlet head 200.

[0089] Referring to Figures 1 to 4 In the embodiment of the application, the air outlet head 200 comprises a sound-absorbing structure 100 and a shell 20, wherein the shell 20 is provided with an air inlet 211 and an air outlet 221, and an air duct is formed between the air inlet 211 and the air outlet 221, the air duct wall of the air duct is provided with a through hole, the sound-absorbing structure 100 is connected to the air duct wall and is in abutment with the through hole through the sound-absorbing hole 112, and at least one of the air inlet 211 and the air outlet 221 is provided with the sound-absorbing structure 100, so as to reduce the noise radiated outward by the air outlet head 200, achieve the purpose of better noise optimization, and improve the user experience.

[0090] Specifically, the noise in the air duct can enter the corresponding sound-absorbing channel 111 through the through hole and the sound-absorbing hole 112 in sequence, and the noise can be eliminated through multiple refraction and reflection, wherein the through hole and the sound-absorbing hole 112 are in one-to-one correspondence; alternatively, one through hole corresponds to multiple sound-absorbing holes 112, and the abutment and communication of the through hole and the sound-absorbing hole 112 can be realized; or the through hole and the sound-absorbing hole 112 are the same through hole.

[0091] It should be noted that, depending on the installation position of the sound-absorbing structure 100 on the shell 20, the sound-absorbing structure 100 can eliminate the noise radiated into the air duct by the air inlet 211, eliminate the noise propagating along the air duct at the air outlet 221, and eliminate the noise radiated outward through the air duct wall, and the noise can mainly be fluid noise and working noise of the fan. Compared with the noise reduction measures such as thickening the shell 20 and the sound shield, in the case of ensuring the air volume of the air outlet head 200, the sound-absorbing structure 100 of the embodiment occupies a smaller space, has low cost, and effectively enhances the noise elimination effect of the air outlet head 200.

[0092] In the embodiment, as shown in Figure 3 The sound-absorbing channel 111 of the sound-absorbing structure 100 is formed after the bottom shell 171 and the top shell 172 are covered, and the sound-absorbing hole 112 is provided on the top shell 172. The sound-absorbing hole 112 is a square hole, and of course, in other embodiments, the shape of the sound-absorbing hole 112 is not limited, and it can be a circular hole, a waist-shaped hole or other hole structure through which air flow can pass.

[0093] Optionally, in an embodiment, the sound absorption structure 100 is integrally arranged with the air duct wall, that is, the sound absorption structure 100 and the air duct wall can be integrally machined, or can be connected by welding, bonding, riveting, etc.

[0094] In another embodiment, the sound absorption structure 100 is detachably connected with the air duct wall, and the mounting mode includes but is not limited to threaded connection, buckling connection, clamping connection, so as to replace the corresponding sound absorption structure 100 according to the specific broadband sound absorption characteristics of the sound absorption structure 100, improve the convenience of disassembly and assembly, and improve the universality of the sound absorption structure 100.

[0095] Optionally, in an embodiment, the sound absorption structure 100 is provided with at least one; in this way, the sound absorption structure 100 can be arranged along the high-noise area of the air duct, such as the air inlet 211, the air outlet 221, and the bend of the air duct, and by arranging the corresponding sound absorption structure 100 in each high-noise area, the noise reduction effect of the air duct with the sound absorption structure 100 can be greatly improved.

[0096] Further, the sound absorption structure 100 is arranged in the air duct without affecting the airflow circulation inside the air duct; or, as shown in Figure 1 The sound absorption structure 100 is arranged on the back side of the air duct without affecting the airflow in the air duct, thereby improving the smoothness of the air inlet and outlet.

[0097] Optionally, in an embodiment, the air outlet 221 is in the form of a slit, which facilitates increasing the pressure of the airflow and improving the speed of the airflow, thereby improving the air supply distance of the air outlet 200. However, due to the small size of the air outlet 221, the noise is large, and the sound absorption structure 100 is arranged close to the air outlet 221 to ensure the noise reduction effect of the air outlet 200. In other embodiments, the sound absorption hole 112 is arranged close to the air outlet 221, and at this time, the air outlet 221 is not in the form of a slit, for example, the air outlet 221 can be configured as a perforated air outlet to uniformly supply air through a large number of small holes.

[0098] Specifically, in an embodiment, the shell 20 includes an air inlet seat 21 and two air outlet arms 22, the bottom of the air inlet seat 21 is provided with the air inlet 211, and the front side of the air outlet arm 22 is provided with the air outlet 221; so that the shell 20 is connected and assembled with the air inlet base 300 through the air inlet 211, and the airflow in the air inlet base 300 is introduced into the air duct through the air inlet 211, and the airflow can be fed back to the external environment after being treated by the sound absorption structure 100, which can be used for user experience.

[0099] The relative two sides of the air inlet base 21 are connected with two air outlet arms 22 respectively to realize air flow distribution, which helps to increase the radiation range of air flow.

[0100] In addition, each sound absorption structure 100 can be selectively arranged on the outer wall surface of the air inlet base 21 and the air outlet arm 22 or the inner wall of the corresponding air duct.

[0101] Optionally, in an embodiment, the shell 20 is provided with a limiting boss 23, which is used to assist the sound absorption hole 112 of the sound absorption structure 100 to communicate with the through hole of the air duct, as shown in the drawing. Figure 2 The limiting boss 23 is arranged on the outer wall surface of the shell 20 and has a ring structure to form a mounting cavity for inserting the sound absorption structure 100, so that the sound absorption structure 100 is arranged around the sound absorption structure 100 after being mounted to the shell 20, the displacement range of the sound absorption structure 100 is constrained, the alignment efficiency of the sound absorption hole 112 and the through hole is improved, and the communication reliability is improved. In other embodiments, the limiting boss 23 is arranged on the sound absorption structure 100, and specifically can be arranged at the sound absorption hole 112 to be connected and inserted into the through hole.

[0102] The application also provides an air treatment device, which comprises an air inlet base 300 and an air outlet head 200. The specific structure of the air outlet head 200 is referred to the above-mentioned embodiments. Since the air treatment device adopts all the technical solutions of the above-mentioned embodiments, it has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0103] The air outlet head 200 is arranged above the air inlet base 300, so that the air flow diffused from the air inlet base 300 to the air outlet head 200 can be reliably connected and guided, the noise of the air flow is reduced, the user experience is improved, and the comfort of human body is improved. The air treatment device can be at least one of a bladeless fan, an air purifier, a humidifier, a dust collector and a range hood.

[0104] In order to further improve the noise reduction effect of the air treatment device, the noise in the air inlet base 300 can be absorbed and isolated by the sound absorption structure 100, and the sound absorption structure 100 in the air outlet head 200 is matched, which greatly enhances the noise reduction effect and helps to improve the user experience.

[0105] Specifically, in combination with the above Figures 5 to 12 In an embodiment, the air inlet base 300 includes a support base 31, a ring shell group, and a sound absorption structure 100; the ring shell group is arranged on the support base 31 to form an air inlet cavity 323 with the support base 31, and the ring shell group is provided with an inlet 321 and an outlet 322 communicating with the air inlet cavity 323; at least one of the support base 31 and the ring shell group is provided with the sound absorption structure 100, and the sound absorption hole 112 of the sound absorption structure 100 communicates with the air inlet cavity 323. It can be understood that the air inlet cavity 323 is equivalent to an air duct, so that the air inlet cavity 323 is provided with a through hole on the cavity wall, and the sound absorption structure 100 is connected to the through hole through the sound absorption hole 112, so that the sound absorption channel 111 in the sound absorption structure 100 is connected to the air inlet cavity 323 through the sound absorption hole 112, and the noise propagating in the air inlet cavity 323 can be absorbed and isolated by the sound absorption channel 111, achieving the purpose of better noise optimization and improving the user experience.

[0106] When the sound absorption structure 100 is arranged on the support base 31, the sound absorption hole 112 and the sound absorption channel 111 formed in the support base 31 can absorb the noise transmitted to the vicinity of the support base 31 without increasing the size of the support base 31; when the sound absorption structure 100 is arranged on the ring shell group, the internal space of the ring shell group is reasonably utilized to form the communicating sound absorption hole 112 and the sound absorption channel 111, thereby the noise in the ring shell group can be absorbed, and the fan module 400 is arranged between the ring shell group and the air outlet head 200, that is, the fan module 400 is arranged on the upper side of the ring shell group close to the air outlet head 200, on the one hand, to ensure the flow of air in the air treatment device, and on the other hand, to absorb the reverse noise generated by the fan module 400 by the sound absorption structure 100 on the air inlet base 300. Compared with the additional noise reduction structure, the space occupied by the air inlet base 300 of the embodiment is unchanged under the condition of ensuring the air inlet amount of the air inlet base 300, and the sound absorption effect of the air inlet base 300 is further enhanced, and the noise entering the air outlet head 200 is weakened, the noise reduction demand of the air outlet head 200 is reduced, which helps to reduce the sound absorption structure 100 on the air outlet head 200 and reduce the overall weight of the air treatment device.

[0107] It is worth mentioning that the sound absorption structure 100 arranged on the air inlet base 300 is specifically formed on the support base 31 and the annular shell group, that is, the structure of the original support base 31 and the annular shell group is utilized, the volume of the air treatment equipment is unchanged, but the sound absorption effect is greatly improved, that is, the mutually independent sound absorption channels 111 are formed in the internal space of the support base 31 and / or the annular shell group, and the total length of at least two of the sound absorption channels 111 is different, which ensures that a plurality of different narrow-band frequencies are absorbed through the superposition of the sound absorption channels 111 with different total lengths, so as to achieve the absorption and elimination of wide-band noise in a specific wide-band, thereby realizing wide-band noise reduction. The total length, cross-sectional shape, cross-sectional size, and other designs of the sound absorption channel 111 and the beneficial effects thereof are specifically referable to the sound absorption structure 100 in the above-mentioned embodiments, which is beneficial to improving the overall sound absorption effect of the air inlet base 300.

[0108] Specifically, referring to Figures 5 to 6 , the annular shell group includes an annular shell 32 and a support column 33 located inside the annular shell 32, the support column 33 is mounted on the support base 31, at least one of the support column 33 and the support base 31 is provided with the sound absorption structure 100, the inlet 321 is formed in the annular shell 32 and avoids the support column 33, and the outlet 322 is formed at the upper end of the annular shell 32. It can be understood that a relatively sealed air inlet cavity 323 can be formed through the connection between the annular shell 32 and the support base 31, the inlet 321 and the outlet 322 are formed in the annular shell 32 to communicate with the air inlet cavity 323, and the outlet 322 can communicate with the air duct in the air outlet head 200 through the fan module 400, so as to ensure that the external airflow enters the air inlet cavity 323 through the inlet 321, and after air treatment in the air inlet cavity 323, the airflow can flow out of the outlet 322 and into the air outlet head 200, completing the air circulation; the support column 33 is built into the air inlet cavity 323 and can be used to support the fan module 400 and the air outlet head 200, etc., ensuring the structural stability of the air inlet base 300 and the air treatment equipment as a whole, wherein the support column 33 avoids the inlet 321, which can effectively prevent the external airflow entering the air inlet cavity 323 through the inlet 321 from impacting the support column 33, thereby reducing the generation of additional fluid noise.

[0109] The support column 33 and the support base 31 have a large design space, that is, a certain thickness and a large cross-sectional area, so that the sound absorption structure 100 can be formed in any one of the support column 33 and the support base 31, thereby reasonably utilizing the internal space of the support column 33 and the support base 31, reducing the influence on the original structure of the air inlet base 300, and reliably improving the sound absorption effect of the air inlet base 300 and reducing the noise radiated outwardly by the air inlet base 300. In other embodiments, within a reasonable design range, other structures in the air inlet base 300 can also be provided with the sound absorption structure 100.

[0110] With reference to Figures 7 to 9 In an embodiment, the sound-absorbing structure 100 is provided with a first sound-absorbing layer 121 and a second sound-absorbing layer 131 on the support base 31, and the first sound-absorbing layer 121 and the second sound-absorbing layer 131 are sequentially stacked on a side away from the air inlet cavity 323, wherein the upper surface of the first sound-absorbing layer 121 is the cavity bottom wall of the air inlet cavity 323 and also the upper surface of the support base 31, the first sound-absorbing holes 123 and the second sound-absorbing holes 133 corresponding to the first sound-absorbing layer 121 and the second sound-absorbing layer 131 are both provided on the upper surface of the support base 31, realizing the communication of the sound-absorbing holes 112 and the air inlet cavity 323, and further realizing the noise reduction of the airflow in the air inlet cavity 323; in this way, the space in the support base 31 is reasonably utilized, and compared with a single sound-absorbing layer, the total number of sound-absorbing holes 112 is increased, the number of sound-absorbing channels 111 corresponding to each sound-absorbing hole 112 is increased, which helps to achieve a greater perforation rate, realize more efficient sound absorption, and improve the sound-absorbing performance of the support base 31. Of course, in other embodiments, the sound-absorbing structure 100 also includes a third sound-absorbing layer 141; or, in the case of the same sound-absorbing effect, the number of sound-absorbing channels 111 in the same layer can also be increased to realize noise reduction, which helps to reduce the thickness of the support base 31.

[0111] Specifically, the support base 31 includes a base body 311, and upper and lower cover plates 312 and 313 arranged on opposite sides of the base body 311, and the base body 311 is sealingly connected with the upper and lower cover plates 312 and 313 to form the first and second sound-absorbing layers 121 and 131, the first and second sound-absorbing holes 123 and 133 are provided in the upper cover plate 312, and because the support base 31 is connected with the support column 33, the first sound-absorbing layer 121 is provided with a mounting groove 314 for the support column 33 to pass through, so that the support column 33 is partially inserted into the mounting groove 314 and fixed on the first sound-absorbing layer 121 by, for example, bolting or the like, wherein the first sound-absorbing channels 122 are arranged away from the mounting groove 314, and the second sound-absorbing layer 131 is provided with a relief gap 315 corresponding to the mounting groove 314, so that the relief gap 315 facilitates the disassembly and assembly of the support column 33 and the support base 31, and at the same time, hides the connection structure between the support column 33 and the support base 31, reducing the risk of structural damage. In this embodiment, the support column 33 is oppositely arranged in two, and at this time, the mounting groove 314 is correspondingly provided with two.

[0112] Further, in an embodiment, the first sound-absorbing layer 121 is provided with a boss structure, and the sound-absorbing holes 112 are formed in the boss structure. It can be understood that the upper surface of the first sound-absorbing layer 121 protrudes towards the outlet 322 to form a boss structure, and the first sound-absorbing holes 123 and the second sound-absorbing holes 133 are arranged in the boss structure. Compared with the sound-absorbing holes 112 composed of the first sound-absorbing holes 123 and the second sound-absorbing holes 133 arranged on a plane, the first sound-absorbing holes 123 and the second sound-absorbing holes 133 can be as close as possible to the diffusion area of the airflow in the air inlet cavity 323, which helps to improve the sound-absorbing efficiency and improve the sound-absorbing effect.

[0113] In another embodiment, the inlets 321 are arranged in an array on the annular shell 32, and part of the inlets 321 are arranged close to the upper surface of the support base 31, that is, the inlets 321 are arranged close to the sound-absorbing holes 112 on the support base 31. In this way, the upper surface of the support base 31 (or the position of the sound-absorbing holes 112) can be integrated into the diffusion area of the airflow flowing into the air inlet cavity 323, so as to improve the sound-absorbing efficiency and the sound-absorbing effect.

[0114] In addition, after the support base 31 can eliminate the broadband noise in a specific broadband, in an embodiment, the support base 31 is further provided with a weight-reducing cavity 316, as shown in Figure 8 The first sound-absorbing layer 121 is provided with a weight-reducing cavity 316, and at this time, the weight-reducing cavity 316 is located in the same layer as the first sound-absorbing channel 122, as shown in Figure 9 The second sound-absorbing layer 131 is provided with a weight-reducing cavity 316, and at this time, the weight-reducing cavity 316 is located in the same layer as the second sound-absorbing channel 132; that is, the first sound-absorbing layer 121 and the second sound-absorbing layer 131 can each have a blind channel, so as to improve the space utilization of the support base 31 and improve the lightness level of the support base 31.

[0115] Optionally, in an embodiment, each first sound-absorbing channel 122 located in the first sound-absorbing layer 121 and each second sound-absorbing channel 132 located in the second sound-absorbing layer 131 are arranged in axial symmetry on the support base 31. It can be understood that at least two first sound-absorbing channels 122 corresponding to the same frequency noise are arranged, and at least two second sound-absorbing channels 132 corresponding to the same frequency noise are arranged, which can enhance the sound-absorbing effect of the corresponding sound-absorbing layer; wherein each first sound-absorbing channel 122 and each second sound-absorbing channel 132 can be arranged in axial symmetry about the central axis or the diagonal line of the support base 31. The central axis can be a line between two mounting grooves.

[0116] In addition, as the annular shell 32 is arranged along the circumference of the support base 31, the enclosed air inlet cavity 323 is located in the middle region of the air inlet base 300, and correspondingly, to ensure the sound absorption effect of fluid noise, the sound absorption holes 112 are arranged in the central region of the support base 31, which corresponds to the air inlet cavity 323 and is away from the connection position of the support column 33 and the annular shell 32 with the support base 31, which not only ensures the diffusion of airflow in the air inlet cavity 323, but also reliably absorbs fluid noise, achieving the purpose of noise reduction.

[0117] Further, after concentrating the sound absorption holes 112 in the central region of the support base 31, in order to reasonably arrange the first sound absorption channels 122 and the second sound absorption channels 132 in the support base 31, in an embodiment, each first sound absorption hole 123 is located at the periphery of each second sound absorption hole 133, so that by concentrating the second sound absorption holes 133, the docking channels 15 can be concentrated, and then the end position of the second sound absorption channel 132 connected with the docking channel 15 is confirmed, and the second sound absorption channel 132 can be radiated outward from the center, facilitating the design of the total length and folding direction of the second sound absorption channel 132. Figure 8 The sound absorption holes 112 enclosed by the dashed box are all second sound absorption holes 133.

[0118] Specifically, due to the specific size of the support base 31, at least part of the sound absorption channels 111 includes a first sound absorption section 161, a second sound absorption section 162 and a third sound absorption section 163 connected in sequence, the first sound absorption section 161 communicates with the air inlet cavity 323, and the first sound absorption section 161 is parallel to the third sound absorption section 163; or, the first sound absorption section 161 and the third sound absorption section 163 are arranged on opposite sides of the second sound absorption section 162, so that the sound absorption efficiency and broadband noise reduction can be ensured while the corresponding noise frequency is absorbed by the first sound absorption channel 122 and the second sound absorption channel 132, and the internal space of the support base 31 is reasonably utilized, improving the space utilization rate of the support base 31. Of course, in other embodiments, part of the first sound absorption channels 122 and the second sound absorption channels 132 each include the first sound absorption section 161 and the second sound absorption section 162; or, part of the first sound absorption channels 122 and the second sound absorption channels 132 each include but are not limited to the first sound absorption section 161, the second sound absorption section 162 and the third sound absorption section 163.

[0119] Referring to Figures 10 to 12In an embodiment, the sound-absorbing structure 100 includes the first sound-absorbing layer 121, the second sound-absorbing layer 131, and the third sound-absorbing layer 141 on the support column 33, and the first sound-absorbing layer 121, the second sound-absorbing layer 131, and the third sound-absorbing layer 141 are sequentially stacked on a side away from the air inlet cavity 323. The upper surface of the first sound-absorbing layer 121 is the cavity side wall of the air inlet cavity 323 and the side of the support column 33 facing the air inlet cavity 323. The first sound-absorbing holes 123, the second sound-absorbing holes 133, and the third sound-absorbing holes 143 corresponding to the first sound-absorbing layer 121, the second sound-absorbing layer 131, and the third sound-absorbing layer 141 are all arranged on the side, realizing the communication between the sound-absorbing holes 112 and the air inlet cavity 323, and further realizing the noise reduction of the airflow in the air inlet cavity 323. In this way, the space in the support column 33 is reasonably utilized, and compared with a single sound-absorbing layer, the total number of sound-absorbing holes 112 increases, the number of sound-absorbing channels 111 corresponding to each sound-absorbing hole 112 increases, which helps to achieve a greater perforation rate, realize more efficient sound absorption, and improve the sound-absorbing performance of the support column 33. Of course, in other embodiments, the sound-absorbing structure 100 only includes the first sound-absorbing layer 121 and the second sound-absorbing layer 131.

[0120] Specifically, the support column 33 includes a column body 332 and two column cover plates 331 arranged on opposite sides of the column body 332. The column body 332 and the column cover plates 331 are sealingly connected to form the sound-absorbing holes 112 and the sound-absorbing channels 111. It can be understood that, in order to match the arrangement of the support column 33 in the circumferential direction of the support base 31, the column body 332 can be part of a circular ring structure. The opposite sides of the column body 332 cooperate with the two column cover plates 331 to form two symmetrical sound-absorbing channels 111 on the opposite sides of the column body 332, i.e., the first sound-absorbing channel 122, the second sound-absorbing channel 132, and the third sound-absorbing channel 142 are symmetrically arranged about the central axis of the column body 332, which extends in the height direction of the support column 33. In combination with the fact that the column body 332 can be part of a circular ring structure, the first sound-absorbing channel 122, the second sound-absorbing channel 132, and the third sound-absorbing channel 142 are sequentially arranged outward from the center in the radial direction of the column body 332 to enhance the sound-absorbing effect. The connection mode between the column body 332 and the column cover plates 331 includes but is not limited to welding, bonding, and buckling, so as to ensure the relative independence between the sound-absorbing channels 111 in the support column 33. Similarly, the air-tight connection in the support base 31 can refer to the connection mode of the support column 33.

[0121] Further, in an embodiment, at least part of the sound absorption holes 112 are arranged close to the outlet 322, and since the outlet 322 is close to the fan module 400, the sound absorption holes 112 can absorb the reverse noise generated by the fan module 400 when working while absorbing the noise in the air inlet cavity 323, which is beneficial to enhance the noise reduction effect of the air inlet base 300; wherein the first sound absorption hole 123 is located below the second sound absorption hole 133, and the second sound absorption hole 133 is located below the third sound absorption hole 143, which facilitates the arrangement of the sound absorption channels 111 corresponding to each sound absorption hole 112 in the support column 33, and at the same time, facilitates the design of the assembly degree and folding direction of the sound absorption channels 111, to ensure the absorption of sound absorption channels 111 to a specific noise frequency.

[0122] In combination with reference Figures 5 to 6 In an embodiment, the annular shell group further comprises a filter screen assembly 34 covering the inlet 321, and the support column 33 is provided in plurality, and the filter screen assembly 34 is provided in plurality, and the plurality of filter screen assemblies 34 and the plurality of support columns 33 are arranged alternately along the circumferential direction of the support base 31, so that the plurality of filter core assemblies and the plurality of support columns 33 are alternately spliced to form a circular ring structure, and the inner ring side of the circular ring structure forms an air inlet cavity 323, and the airflow flowing from the inlet 321 passes through the filter screen assembly 34 to filter the particulate matter and harmful components in the airflow, and the filtered airflow is diffused in the air inlet cavity 323 and subjected to noise reduction treatment through the sound absorption channels 111 communicating with the air inlet cavity 323, and then flows out through the outlet 322. The filter screen assembly 34 comprises an external micro-perforated semicircular plate, a filter material structure, a filter material framework, etc.

[0123] In combination with reference Figures 13 to 27 In an embodiment, the air inlet base 300 and the air outlet head 200 are provided with a fan module 400, and the fan module 400 is provided with a sound absorption structure 100 as described above, wherein the fan module 400 is fixed to the upper end of the support column 33 and covers the outlet 322, so as to ensure that the airflow flowing out of the air inlet cavity 323 is diffused towards the air outlet head 200 under the action of the fan module 400, and the sound absorption structure 100 located on the fan module 400 can absorb and eliminate the noise generated by the fan module 400 during working, such as the noise of wind wheel rotation and fluid noise.

[0124] Optionally, in an embodiment, the fan module 400 comprises a casing 41, a fan is fixed in the casing 41, and a guide air passage 423 is formed on the casing 41 and arranged around the fan, the guide air passage 423 is connected with the air inlet base 300 and the air outlet head 200; a sound absorption structure 100 is arranged on the side of the casing 41 facing the air outlet head 200, and the sound absorption structure 100 is arranged along the direction in which the guide air passage 423 is arranged around, so that when the air flows through the guide air passage 423 and flows to the air outlet head 200, the noise will be absorbed and eliminated when the air flows through the sound absorption structure 100 because the sound absorption structure 100 is close to the guide air passage 423 and located at the back of the fan, thereby reducing the noise reduction demand at the air outlet head 200.

[0125] Specifically, the fan module 400 comprises a casing 41 and an air flow adjusting structure, the air flow adjusting structure is arranged above the casing 41, and a guide air cavity 411 is formed between the air flow adjusting structure and the casing 41, the casing 41 is connected with the air inlet base 300 and is provided with an air passage 412 connected with the outlet 322 and the guide air cavity 411, and the air in the guide air cavity 411 enters the air outlet head 200 through the air flow adjusting structure; the fan module 400 further comprises a mesh cover 46 covering the air passage 412.

[0126] Among them, the air flow adjusting structure comprises a turbulence structure 44 and a guide air structure 42, the guide air structure 42 comprises a guide air structure main body 421 provided with a guide air passage 423, the guide air passage 423 is connected with the guide air cavity 411 and the air outlet head 200, and a turbulence end 442 of the turbulence structure 44 is arranged in the guide air passage 423, and then the air flowing through the guide air passage 423 is broken by the turbulence end 442, thereby forming multiple small air flows, the multiple small air flows can be mixed with each other after leaving the guide air passage 423, thereby consuming the kinetic energy of the air flow and inhibiting the generation of large-scale vortex, thereby reducing the noise. In other embodiments, the air flow adjusting structure only comprises the guide air structure 42; further, the guide air structure 42 further comprises multiple guide vanes 422, each guide vane 422 is arranged on the guide air passage 423 in a spaced manner to separate multiple guide air passages 424, and the turbulence end 442 of the turbulence structure 44 is arranged in the guide air passage 424, and then the guide vanes 422 and the turbulence end 442 can break the air flow to a certain extent.

[0127] The air guide structure body 421 is a cavity top wall of the air guide cavity 411. The air guide structure body 421 is provided with a fan mounting cavity 425 and an annular groove 426 arranged oppositely. The air guide passage 423 is annularly arranged around the outer periphery of the annular groove 426. The annular groove 426 is arranged on the side of the air guide structure body 421 away from the air guide cavity 411 and around the fan mounting cavity 425. The fan mounting cavity 425 is used for fixing the motor 452 of the fan, so that the fan wheel 451 of the fan is located in the air guide cavity 411 and guides the airflow in the air guide cavity 411. The fan module 400 further comprises a cover body 43 covering the annular groove 426. Thus, after the airflow passing through the air guide passage 423 exits the air guide cavity 411, it is difficult to enter the annular groove 426 under the blocking of the cover body 43, which is conducive to suppressing the resonance sound of the annular groove 426.

[0128] Optionally, the cover body 43 and the annular groove 426 after being covered form a sound absorption structure 100 to achieve noise reduction. In an embodiment, as shown in Figure 17 the sound absorption structure 100 comprises a plurality of sound absorption holes 112 arranged on the cover body 43 and a plurality of sound absorption channels 111 with different total lengths extending along the circumference of the annular groove 426. One sound absorption hole 112 is arranged at one end of one sound absorption channel 111. Thus, the plurality of sound absorption channels 111 are resonantly coupled to achieve broadband sound absorption, achieving the purpose of sound absorption and noise reduction. Specifically, the plurality of sound absorption channels 111 are arranged in sequence in the axial direction away from the annular groove 426, and / or the plurality of sound absorption channels 111 are arranged in sequence in the axial direction of the annular groove 426 to improve the utilization of the space in the annular groove 426.

[0129] In another embodiment, as shown in Figure 18 the sound absorption structure 100 comprises a plurality of sound absorption holes 112 arranged on the cover body 43 and a plurality of sound absorption channels 111 arranged along the circumference of the annular groove 426. Each sound absorption channel 111 extends along the axial direction of the annular groove 426, and one sound absorption channel 111 corresponds to one sound absorption hole 112. The size of each sound absorption channel 111 and each sound absorption hole 112 is at least partially different to achieve broadband sound absorption and improve the noise of the fan module 400.

[0130] Optionally, in an embodiment, the air guide structure 42 and the turbulence structure 44 are detachably connected. Thus, once the air guide structure 42 or the turbulence structure 44 is damaged, the air guide structure 42 or the turbulence structure 44 can be replaced individually, which is conducive to reducing the maintenance cost of the airflow adjusting structure. However, the design is not limited to this. In other embodiments, the air guide structure 42 and the turbulence structure 44 are integrally formed. Thus, on the one hand, the assembly process of the air guide structure 42 and the turbulence structure 44 can be saved, and on the other hand, the overall structural strength of the air guide structure 42 and the turbulence structure 44 is higher.

[0131] Optionally, in an embodiment, the turbulence structure 44 comprises a turbulence module, the turbulence module comprises at least one turbulence portion 441, the turbulence portion 441 has a mounting end 443 and a turbulence end 442, the mounting end 443 is connected to the air guide structure 42, and specifically can be arranged close to the outer ring wall of the air guide opening 423, and the turbulence end 442 is suspended in the air guide opening 423, that is, the turbulence end 442 extends towards the inner ring wall of the air guide opening 423, and is not connected to the air guide structure body 421, so as to ensure the flow of the airflow, and at the same time, under the centrifugal effect, the airflow flowing out of the air guide opening 423 is closer to the outer ring wall, and the flow rate of the airflow is greater, at this time, the turbulence portion 441 arranged close to the outer ring wall can cut the airflow with a greater flow rate, so as to ensure that the turbulence structure 44 suppresses large-scale vortex flow and effectively reduces noise. When the air guide opening 423 is large, the turbulence module comprises a plurality of turbulence portions 441.

[0132] Specifically, in an embodiment, the turbulence structure 44 further comprises a support 444, the turbulence portion 441 is fixed to the support 444 through the mounting end 443, and then, when a plurality of turbulence modules are arranged, the arrangement of the support 444 facilitates the simultaneous arrangement of the turbulence modules on the air guide structure 42, improves the assembly efficiency, and is also convenient for replacing the turbulence structure 44. In other embodiments, the mounting end 443 is directly connected to the air guide structure body 421, which helps to improve the overall structural strength of the air guide structure 42 and the turbulence structure 44.

[0133] When the air guide opening 423 extends around the circumference of the fan or the air guide channel 424 is arranged along the circumference of the fan, the support 444 is arranged in a ring shape, at this time, a plurality of turbulence modules are arranged on the support 444 at intervals around the axis of the support 444, and specifically, the turbulence modules can be arranged on the inner side of the support 444, can be arranged on the outer side of the support 444, or can be arranged on the bottom of the support 444, which is not limited herein. In other embodiments, the support 444 can be arranged in a rod shape, at this time, a plurality of turbulence modules are arranged at intervals along the extension direction of the support 444.

[0134] Optionally, in an embodiment, the support 444 is provided with a plurality of connecting portions 445, the plurality of connecting portions 445 are arranged at intervals along the circumference of the support 444 and extend towards the air guide opening 423, wherein one connecting portion 445 is connected to one turbulence module, in this way, the connecting portion 445 is convenient to extend into the air guide opening 423, and then the turbulence end 442 of the turbulence module is arranged in the air guide opening 423, so as to realize the suppression of large-scale vortex flow.

[0135] When the air guide passageway 423 is formed into multiple air guide passageways 424 due to the arrangement of the guide vanes 422, to facilitate the installation of the turbulence structure 44 on the air guide structure 42, the avoiding notches 446 formed between two adjacent connecting portions 445 can be arranged to avoid the guide vanes 422, to facilitate the assembly of the turbulence structure 44; at this time, one connecting portion 445 extends into one air guide passageway 424, and then one turbulence module corresponds to one air guide passageway 424, which can reliably suppress the generation of large-scale vortexes.

[0136] Further, in an embodiment, the avoiding notches 446 are provided with limiting notches 447 facing the wall surface of the guide vanes 422, the limiting notches 447 are used to clamp the guide vanes 422, in this way, after the turbulence structure 44 and the air guide structure 42 are assembled, the guide vanes 422 are clamped into the limiting notches 447, and the limiting notches 447 limit the movement of the turbulence structure 44 around the axis of the support 444. In other embodiments, the turbulence structure 44 further comprises an adhesive layer provided on the support 444, which is used to adhere to the air guide structure 42.

[0137] Optionally, the turbulence portion 441 is in a plate shape, and in an embodiment, the plane in which the plate surface of the turbulence portion 441 is located is parallel to the axis of the air guide passageway 423, which can effectively suppress the generation of large-scale vortexes, thereby reducing noise.

[0138] In another embodiment, referring to Figures 19 to 27 , the plane in which the plate surface of the turbulence portion 441 is located intersects the axis of the air guide passageway 423, which helps to further improve the noise; it should be noted that the plate surface refers to one of the two plate surfaces in the thickness direction of the turbulence portion 441. The axis of the air guide passageway 423 coincides with the axis of the support 444.

[0139] Specifically, taking the intersection of the plane in which the plate surface of the turbulence portion 441 is located and the axis of the air guide passageway 423 as an example, when the turbulence module comprises one turbulence portion 441, as Figure 20 shown, the included angle between the plate surface and the axis of the air guide passageway 423 is 15°; as Figure 23 shown, the included angle between the plate surface and the axis of the air guide passageway 423 is 23°; as Figure 21 shown, the included angle between the plate surface and the axis of the air guide passageway 423 is 35°; when the turbulence module comprises two turbulence portions 441, and the planes in which the plate surfaces of the two turbulence portions 441 are located intersect, as Figure 25 shown, the included angle between one plate surface and the axis of the air guide passageway 423 is 15°, the included angle between the other plate surface and the axis of the air guide passageway 423 is 25°, and the distance between the two plate surfaces gradually decreases in the extension direction of the connecting portion 445; as Figure 26As shown, the angle between one plate surface and the axis of the air guide passage 423 is 15°, the angle between the other plate surface and the axis of the air guide passage 423 is 25°, and the distance between the two plate surfaces gradually increases in the extension direction of the connecting portion 445; while as shown in Figure 27 As shown, the turbulence module includes two turbulence portions 441, and the planes in which the plate surfaces of the two turbulence portions 441 are arranged in parallel. Of course, the angle between the plane in which the plate surface of the turbulence portion 441 is arranged and the axis of the air guide passage 423 is not limited to the above angles, as long as the inhibiting effect of the turbulence portion 441 is met.

[0140] The turbulence portion 441 has many structural forms, and in an embodiment, the turbulence portion 441 is in the shape of a quadrangular prism or a triangular prism, which can also inhibit the generation of large-scale vortexes and reduce noise. Of course, in other embodiments, the turbulence portion 441 can also be in the shape of a rod, specifically a cylindrical rod.

[0141] Optionally, in an embodiment, the inclination directions of the guide vanes 422, the turbulence portions 441 and the fan blades of the fan are consistent, so that the air handling equipment has smaller noise. In other embodiments, the inclination directions of the guide vanes 422, the turbulence portions 441 and the fan blades of the fan can also be set according to actual needs.

[0142] The above description is only optional embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made under the inventive concept of the present application, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A sound-absorbing structure applied to an air handling equipment, wherein the air handling equipment is provided with an air duct, characterized in that, The sound absorption structure comprises: a plurality of sound absorption channels and a plurality of sound absorption holes corresponding to the sound absorption channels; The sound absorption structure is connected to the air duct through the sound absorption holes, the sound absorption channels are not connected to each other, and the total lengths of at least two sound absorption channels are different.

2. The sound absorbing structure of claim 1, wherein The sound absorption holes are arranged at one end of the sound absorption channels.

3. The sound absorbing structure of claim 2, wherein At least part of the sound absorption channels comprises a first sound absorption section and a second sound absorption section, one end of the first sound absorption section is laterally connected to the second sound absorption section, and the other end is connected to the sound absorption holes.

4. The sound absorbing structure of claim 1, wherein The total length L of the sound absorption channels and the wavelength λ of the sound absorption frequency corresponding to the sound absorption channels satisfy L = λ / 4.

5. The sound absorbing structure of claim 4, wherein The difference between the sound absorption frequencies of two sound absorption channels with adjacent total lengths is δ, and 10Hz ≤ δ ≤ 50Hz.

6. The sound absorbing structure of claim 1, wherein The sound absorption holes are square holes.

7. The sound absorbing structure of claim 1, wherein The cross-sectional shape of the sound absorption channels is at least one of a rectangle, a triangle, a trapezoid, and a circle.

8. The sound absorbing structure of claim 1, wherein The sound absorption structure further comprises a windproof sound transmission member, and the windproof sound transmission member covers the sound absorption holes.

9. The sound absorbing structure of claim 8, wherein The windproof sound transmission member is configured as a non-woven fabric or a film structure.

10. The sound absorbing structure of claim 1, wherein The sound absorption structure comprises at least one sound absorption layer, and a plurality of sound absorption channels are arranged in the sound absorption layer.

11. The sound absorbing structure of claim 10, wherein The sound absorption structure comprises a first sound absorption layer and a second sound absorption layer arranged along the axis direction of the sound absorption holes, the sound absorption holes comprise first sound absorption holes connected to first sound absorption channels in the first sound absorption layer and second sound absorption holes connected to second sound absorption channels in the second sound absorption layer; The first sound absorption layer is located above the second sound absorption layer, the second sound absorption channels are connected to the second sound absorption holes through butt channels penetrating the first sound absorption layer, and the butt channels are not connected to the first sound absorption channels.

12. An air outlet head characterized by, Comprise: a shell, an air inlet and an air outlet are arranged on the shell, an air duct is formed between the air inlet and the air outlet, and a through hole is arranged on the wall of the air duct; and The sound absorption structure of any one of claims 1 to 11 is connected to the wall of the air duct and butts the through hole through the sound absorption holes, and at least one of the air inlet and the air outlet is provided with the sound absorption structure.

13. The air outlet head of claim 12, wherein, The sound absorption structure is provided with at least one; The sound absorption structure is arranged in the air duct, or the sound absorption structure is arranged on the back side of the air duct.

14. The air outlet head of claim 12, wherein, The air outlet is in the form of a slit, the sound absorption structure is arranged close to the air outlet, and / or the sound absorption holes are arranged close to the air outlet.

15. The air outlet head of claim 12, wherein, The shell comprises an air inlet seat and two air outlet arms, the bottom of the air inlet seat is provided with the air inlet, and the front side of the air outlet arm is provided with the air outlet; The opposite sides of the air inlet seat are respectively connected to the two air outlet arms, and the air inlet seat and the air outlet arm are both provided with the sound absorption structure.

16. The air outlet head of claim 12, wherein, A limiting boss is arranged on the shell, and the limiting boss is used to assist the sound absorption holes of the sound absorption structure to communicate with the through hole of the air duct.

17. An air treatment device, characterised in that, The air inlet base comprises a supporting base and a ring-shaped shell group, the ring-shaped shell group is arranged on the supporting base to form an air inlet cavity together with the supporting base, and the ring-shaped shell group is provided with an inlet and an outlet communicating with the air inlet cavity; 18. The air treatment device of claim 17, wherein, ​ At least one of the support base and the ring-shaped shell group is provided with the sound absorption structure as claimed in any one of claims 1 to 11, and sound absorption holes of the sound absorption structure are communicated with the air inlet cavity.

19. The air treatment device of claim 18, wherein, A fan module is arranged between the air inlet base and the air outlet head, and the fan module is provided with the sound absorption structure as claimed in any one of claims 1 to 11.

20. The air treatment device of claim 19, wherein, The fan module comprises a casing, a fan is fixed in the casing, and a guide air passage is formed on the casing and arranged around the outer periphery of the fan, and the guide air passage is communicated with the air inlet base and the air outlet head. A sound absorption structure is arranged on the side of the casing facing the air outlet head, and the sound absorption structure is arranged along the arrangement direction of the guide air passage.

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