Air duct volute, fan component and air treatment device

Abstract

The invention discloses an air duct volute, a fan component and an air handling device.The air duct volute comprises a volute body and a silencing cover, the volute body comprises a volute part and an air outlet part, the volute part is used for containing a wind wheel and is provided with an airflow inlet, the air outlet part is provided with an airflow outlet, and at least a silencing hole structure is formed in the air outlet part; the silencing hole structure penetrates through the air outlet part in the wall thickness direction of the air outlet part, and a first sealing flange is formed on the volute body; the silencing cover covers the periphery of the silencing hole structure, a silencing cavity is defined between the silencing cover and the volute body, the silencing cover comprises a cover body and a second sealing flange, the second sealing flange is connected to the edge of the cover body, and the first sealing flange is in sealing fit with the second sealing flange. According to the air duct volute, noise generated in the working process of the wind wheel can be reduced. In addition, the air duct volute can improve the sealing effect between the silencing cover and the volute body, and therefore the noise reduction effect of the silencing cover is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an air duct volute, a fan component and an air treatment device. Background Art

[0002] In the related art, the wind wheel in the fan component generates a lot of noise during operation. The volute can suck in air and then blow it out after acceleration. Therefore, the wind speed at the wind outlet of the volute is generally high. The high-speed wind will rub against the volute, which often causes a lot of noise at the wind outlet of the volute. Therefore, there is room for improvement. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to propose an air duct volute, by arranging a silencer hole at the air outlet of the air duct volute, so that a silencer cover is arranged at the surrounding part of the silencer hole structure, the noise generated by the air outlet can be transmitted to the silencer cavity of the silencer cover through the silencer hole structure for noise reduction treatment, which can reduce the noise generated during the operation of the wind wheel; in addition, through the sealing cooperation between the second sealing flange on the silencer cover and the first sealing flange on the volute body, the sealing effect between the silencer cover and the volute body can be improved, thereby further improving the noise reduction effect.

[0004] The present invention provides a fan component having the above-mentioned air duct volute.

[0005] The present invention also provides an air treatment device having the above-mentioned air duct volute.

[0006] According to the air duct volute of the embodiment of the first aspect of the present invention, the air duct volute includes: a volute body, including a volute part and an air outlet part, the volute part is used to accommodate a wind wheel and has an airflow inlet, the air outlet part has an airflow outlet, at least a silencer hole structure is formed on the air outlet part, the silencer hole structure penetrates the air outlet part along the wall thickness direction of the air outlet part, and a first sealing flange is formed on the volute body; a silencer cover, the cover is arranged around the silencer hole structure and defines a silencer cavity between the volute body, the silencer cover includes a cover body and a second sealing flange, the second sealing flange is connected to the edge of the cover body, and the first sealing flange is sealed with the second sealing flange.

[0007] According to the air duct volute of the embodiment of the present invention, a silencer hole is provided at the air outlet of the air duct volute, so that a silencer cover is provided at the surrounding part of the silencer hole structure. The noise generated by the air outlet can be transmitted to the silencer cavity of the silencer cover through the silencer hole structure for noise reduction treatment, thereby reducing the noise generated during the operation of the wind wheel. In addition, through the sealing cooperation between the second sealing flange on the silencer cover and the first sealing flange on the volute body, the sealing effect between the silencer cover and the volute body can be enhanced, thereby further improving the noise reduction effect.

[0008] According to some embodiments of the present invention, the sealing cooperation between the first sealing flange and the second sealing flange includes: the first sealing flange abuts against the second sealing flange or a sealing structure is provided between the first sealing flange and the second sealing flange.

[0009] According to some embodiments of the present invention, the width of the first sealing flange and / or the second sealing flange is 5 to 20 mm.

[0010] According to some embodiments of the present invention, the second sealing flange is located outside the muffler cavity.

[0011] According to some embodiments of the present invention, the first sealing flanges are formed on both the upper edge and the lower edge of the cover body, and two second sealing flanges spaced apart in the up-down direction are formed on the volute body.

[0012] According to some embodiments of the present invention, the silencer cover is detachably connected to the volute body.

[0013] According to some embodiments of the present invention, a connecting lug is formed on the muffler cover, a fixing column is formed on the volute body, and the fastener is inserted through the connecting lug and the corresponding fixing column.

[0014] According to some embodiments of the present invention, the volute body includes a detachably connected volute body and an air inlet cover, one axial side of the volute body is open, the air inlet cover is arranged on the open side of the volute body, the air flow inlet is formed on the air inlet cover, the volute body includes the volute part and a part of the air outlet part, the air inlet cover includes the volute part and another part of the air outlet part; a first connecting flange is formed on the open side of the volute body, and a second connecting flange is formed on the air inlet cover, the first connecting flange is connected to the second connecting flange, the silencer hole structure is formed on the volute body, and the silencer cover is installed on the volute body.

[0015] According to some embodiments of the present invention, the soundproof cover is connected to the first connecting flange.

[0016] According to some embodiments of the present invention, the cover body extends along the circumference of the air outlet portion, and the sound-absorbing cover at least surrounds half of the circumference of the air outlet portion.

[0017] According to some embodiments of the present invention, the cover body includes a plurality of sub-cover bodies extending along the circumference of the air outlet portion, the plurality of sub-cover bodies are respectively located on different sides of the air outlet portion, and two adjacent sub-cover bodies are connected with each other at an angle.

[0018] According to some embodiments of the present invention, the plurality of sub-covers are integrally formed.

[0019] According to some embodiments of the present invention, the side wall of the air outlet portion includes a bent side wall extending non-linearly in the up and down directions, the bent side wall is formed with the silencer hole structure, and the cover body includes a bent portion, and the bent portion is covered on the bent side wall to adapt to the bent side wall.

[0020] According to some embodiments of the present invention, the soundproof cover is an integrally formed part.

[0021] According to some embodiments of the present invention, an extension plate is connected to the outer peripheral side of the airflow outlet, and the extension plate is adjacent to the volute tongue of the volute portion and forms the silencer hole structure.

[0022] According to some embodiments of the present invention, the muffler hole structure is formed as a grille structure, the grille structure includes a plurality of intersecting grille ribs, the width of the grille ribs is 2 to 5 mm and / or the thickness of the grille ribs is 2 to 4 mm.

[0023] According to some embodiments of the present invention, the thickness of the cover body is 0.4-4 mm.

[0024] According to some embodiments of the present invention, the gap between the cover body and the volute body is 5 to 100 mm.

[0025] According to some embodiments of the present invention, the silencer hole structure extends upward to the edge of the airflow outlet, the height dimension of the silencer hole structure in the up and down direction is H1, the distance between the airflow outlet and the central axis plane of the volute part in the up and down direction is H2, the ratio of H1 to H2 ranges from 1 / 3 to 1, and the central axis plane passes through the central axis of the volute part and is parallel to the horizontal plane.

[0026] According to some embodiments of the present invention, a sound absorbing material is provided in the silencing cavity.

[0027] A fan component according to an embodiment of a second aspect of the present invention comprises: an air duct volute according to an embodiment of the first aspect of the present invention; and a wind wheel disposed in the volute.

[0028] According to the fan component of the embodiment of the present invention, by setting the above-mentioned air duct volute, by setting a silencer hole on the air outlet part of the air duct volute, so that the silencer cover is arranged around the silencer hole structure, the noise generated by the air outlet part can be transmitted to the silencer cavity of the silencer cover through the silencer hole structure for noise reduction treatment, which can reduce the noise generated during the operation of the wind wheel; in addition, through the sealing cooperation between the second sealing flange on the silencer cover and the first sealing flange on the volute body, the sealing effect between the silencer cover and the volute body can be improved, thereby further improving the noise reduction effect.

[0029] An air treatment device according to an embodiment of a third aspect of the present invention includes: a fan component according to an embodiment of the second aspect of the present invention.

[0030] According to the air treatment device of the embodiment of the present invention, by providing the above-mentioned fan component, by providing a silencer hole at the air outlet part of the air duct volute of the fan component, so that the silencer cover is arranged at the surrounding part of the silencer hole structure, the noise generated by the air outlet part can be transmitted to the silencer cavity of the silencer cover through the silencer hole structure for noise reduction treatment, which can reduce the noise generated during the operation of the wind wheel; in addition, through the sealing cooperation between the second sealing flange on the silencer cover and the first sealing flange on the volute body, the sealing effect between the silencer cover and the volute body can be improved, thereby further improving the noise reduction effect.

[0031] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0033] Figure 1 is a schematic diagram of an indoor unit of an air conditioner according to some embodiments of the present invention;

[0034] Figure 2 It is a partial exploded schematic diagram of the indoor unit of the air conditioner in the figure;

[0035] Figure 3 is a schematic diagram of a fan component according to some embodiments of the present invention;

[0036] Figure 4 yes Figure 3 A schematic diagram of the fan components from another angle;

[0037] Figure 5 yes Figure 3 Exploded view of the fan components in Figure 1;

[0038] Figure 6 yes Figure 3A schematic diagram of the volute body in FIG.

[0039] Figure 7 yes Figure 3 Schematic diagram of the volute body, the silencer cover and the sound absorbing material;

[0040] Figure 8 yes Figure 7 Schematic diagram of the assembly of the volute body, the silencer cover and the sound absorbing material;

[0041] Fig. 9 yes Figure 8 The cross-sectional view of line AA in the figure;

[0042] Fig.10 yes Figure 3 Schematic diagram of the silencer cover;

[0043] Fig.11 yes Figure 3 Schematic diagram of the assembly of the silencer cover and the sound absorbing material.

[0044] Reference numerals:

[0045] 100, air conditioner indoor unit; 101, housing; 102, air handling unit; 103, first accommodating chamber; 104, second accommodating chamber; 105, first air inlet; 106, first air outlet; 107, second fan component; 108, heat exchange air supply unit;

[0046] 10. Fan parts; 11. Wind wheel; 12. Air duct volute; 13. Volute body;

[0047] 20. volute; 21. airflow inlet; 22. wind wheel cavity; 23. volute tongue; 24. air outlet; 241. bent side wall; 25. airflow outlet; 26. air outlet channel; 27. first sealing flange; 28. fixing column; 29. ​​extension plate;

[0048] 30. Silencer hole structure; 31. Grille structure; 32. Grille ribs;

[0049] 40. Silence cover; 41. Silence chamber; 42. Cover body; 43. Sub-cover body; 44. Second sealing flange; 45. Bend portion; 46. Connecting lug;

[0050] 50. volute body; 51. first connecting flange; 52. connecting column;

[0051] 60. Air inlet cover; 61. Second connecting flange; 62. Connecting hole;

[0052] 70. Sound-absorbing materials. DETAILED DESCRIPTION

[0053] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0054] The following describes an air duct volute 12 according to an embodiment of the present invention with reference to the accompanying drawings. The air duct volute 12 is used for the fan component 10.

[0055] According to the air duct volute 12 of the embodiment of the first aspect of the present invention, the air duct volute 12 includes a volute body 13 and a muffler 40, the volute body 13 includes a volute portion 20 and an air outlet portion 24, the volute portion 20 is used to accommodate the wind wheel 11 and has an airflow inlet 21, and the air outlet portion 24 has an airflow outlet 25. A wind wheel cavity 22 for accommodating the wind wheel 11 is defined in the volute portion 20, an airflow inlet 21 connected to the wind wheel cavity 22 is formed on the volute portion 20, and an air outlet channel 26 connected to the wind wheel cavity 22 is defined in the air outlet portion 24, and the air outlet channel 26 has an airflow outlet 25. During the operation of the fan component 10, the wind wheel 11 located in the wind wheel cavity 22 rotates at a high speed, sucks the airflow outside the fan component 10 into the air duct volute 12 through the airflow inlet 21, and gathers the sucked airflow in the air outlet channel 26, and finally blows it out at the airflow outlet 25 at an accelerated speed.

[0056] During the operation of the wind wheel 11, the airflow has a relatively high wind speed when it flows through the air outlet channel 26. The airflow with a relatively high wind speed will generate relatively high noise, thereby causing relatively high noise at the air outlet portion 24 during the operation of the wind wheel 11.

[0057] At least the air outlet 24 is formed with a silencer hole structure 30, which may be formed by the air outlet 24, the air outlet 24 and other parts of the volute body 13, or the volute body 13. The silencer hole structure 30 penetrates the air outlet 24 along the wall thickness direction of the air outlet 24, and the sound cover is arranged around the silencer hole structure 30 and defines a silencer cavity 41 between the volute body 13. The silencer hole structure 30 is arranged around the silencer hole structure 30, and a silencer cavity 41 is defined between the silencer hole structure 30 and the volute body 13. The noise generated in the air outlet channel 26 can be transmitted to the muffler cavity 41 of the muffler cover 40 through the muffler hole structure 30, and the noise entering the muffler cavity 41 through the muffler hole structure 30 can be absorbed and consumed by the muffler cavity 41, thereby reducing the noise to a large extent, thereby effectively achieving noise reduction processing such as muffler and sound absorption of the noise generated by the air outlet 24. In addition, when the noise generated in the air outlet channel 26 passes through the muffler hole structure 30, refraction, interference and diffraction will occur, thereby changing the propagation direction and path of the noise, and the muffler hole structure 30 itself can also achieve the effect of reducing noise to a certain extent.

[0058] remove

[0059] A first sealing flange 27 is formed on the volute body 13, and the first sealing flange 27 can improve the structural strength of the volute body 13 to a certain extent. The silencer 40 includes a hood 42 and a second sealing flange 44, and the second sealing flange 44 can improve the overall structural strength of the silencer 40 to a certain extent. The second sealing flange 44 is connected to the edge of the hood 42, and the first sealing flange 27 is sealed with the second sealing flange 44. Through the sealing cooperation between the second sealing flange 44 on the silencer 40 and the volute body 13, the sealing effect between the silencer 40 and the volute body 13 can be improved, and the noise entering the silencer cavity 41 can be avoided or reduced from leaking out from the cooperation between the silencer 40 and the volute body 13, thereby further improving the noise reduction effect. In addition, it is also possible to reduce or avoid the air flow in the air outlet channel 26 entering the silencer cavity 41 of the silencer cover 40 through the silencer hole structure 30 and leaking from the fitting point between the silencer cover 40 and the volute body 13 to cause air volume loss, thereby ensuring that the noise reduction of the air outlet part 24 is achieved while reducing the impact on the air volume of the air outlet part 24.

[0060] According to the air duct volute 12 of the embodiment of the present invention, a silencer hole is provided at the air outlet portion 24 of the air duct volute 12, so that the silencer cover 40 is provided on the surrounding area of ​​the silencer hole structure 30. The noise generated by the air outlet portion 24 can be transmitted to the silencer cavity 41 of the silencer cover 40 through the silencer hole structure 30 for noise reduction treatment, thereby reducing the noise generated during the operation of the wind wheel 11. In addition, through the sealing cooperation between the second sealing flange 44 on the silencer cover 40 and the first sealing flange 27 on the volute body 13, the sealing effect between the silencer cover 40 and the volute body 13 can be improved, thereby further improving the noise reduction effect.

[0061] According to some embodiments of the present invention, the sealing cooperation between the first sealing flange 27 and the second sealing flange 44 includes: the first sealing flange 27 and the second sealing flange 44 abut against each other to achieve a sealing cooperation sealing structure.

[0062] For example, refer to Fig. 9 The first sealing flange 27 and the second sealing flange 44 are in sealing cooperation by abutting against each other, thereby ensuring the sealing effect.

[0063] According to some embodiments of the present invention, the sealing cooperation between the first sealing flange 27 and the second sealing flange 44 includes: a sealing structure is provided between the first sealing flange 27 and the second sealing flange 44. The first sealing flange 27 and the second sealing flange 44 can be sealedly connected by the sealing structure to ensure the sealing effect between the first sealing flange 27 and the second sealing flange 44.

[0064] Optionally, the sealing structure may be a sealing rubber strip, a sealing adhesive, or the like.

[0065] According to some embodiments of the present invention, the flange width W1 of the first sealing flange 27 (see Fig. 9 ) is 5 to 20 mm. For example, the width W1 of the first sealing flange 27 can be 5 mm, 10 mm, 15 mm, 20 mm, etc. If the flange width of the first sealing flange 27 is less than 5 mm, the flange width of the first sealing flange 27 will be smaller, so that the matching area between the first sealing flange 27 and the second sealing flange 44 is smaller, and the sealing effect between the first sealing flange 27 and the second sealing flange 44 cannot be guaranteed; if the flange width of the first sealing flange 27 is greater than 20 mm, the flange width of the first sealing flange 27 will be larger, resulting in a larger space occupancy rate of the air duct volute 12.

[0066] By setting the flange width of the first sealing flange 27 to 5-20 mm, the sealing effect between the first flange and the second flange can be ensured, and at the same time, the space utilization rate inside the whole machine can be improved.

[0067] According to some embodiments of the present invention, the flange width W2 (refer to Fig. 9 ) is 5 to 20 mm. For example, the width W2 of the second sealing flange 44 can be 5 mm, 10 mm, 15 mm, 20 mm, etc. If the flange width of the second sealing flange 44 is less than 5 mm, the flange width of the second sealing flange 44 will be smaller, so that the matching area between the first sealing flange 27 and the second sealing flange 44 is smaller, and the sealing effect between the first sealing flange 27 and the second sealing flange 44 cannot be guaranteed; if the flange width of the second sealing flange 44 is greater than 20 mm, the flange width of the second sealing flange 44 will be larger, resulting in a larger space occupancy rate of the air duct volute 12.

[0068] By setting the flange width of the second sealing flange 44 to 5-20 mm, the sealing effect between the first flange and the second flange can be ensured, and at the same time, the space utilization rate inside the whole machine can be improved.

[0069] According to some embodiments of the present invention, the flange width of the first sealing flange 27 is 5 to 20 mm, and the flange width of the second sealing flange 44 is 5 to 20 mm. For example, the width of the first sealing flange 27 can be 5 mm, 10 mm, 15 mm, 20 mm, etc., and the width of the second sealing flange 44 can be 5 mm, 10 mm, 15 mm, 20 mm, etc. If the flange widths of the first sealing flange 27 and the second sealing flange 44 are less than 5 mm, the flange widths of the first sealing flange 27 and the second sealing flange 44 will be smaller, so that the matching area of ​​the first sealing flange 27 and the second sealing flange 44 is smaller, so that the sealing effect between the first sealing flange 27 and the second sealing flange 44 cannot be guaranteed; if the flange widths of the first sealing flange 27 and the second sealing flange 44 are greater than 20 mm, the flange widths of the first sealing flange 27 and the second sealing flange 44 will be larger, so that the space occupancy rate of the air duct volute 12 is larger.

[0070] By setting the flange widths of the first sealing flange 27 and the second sealing flange 44 to 5-20 mm, the sealing effect between the first flange and the second flange can be ensured, and at the same time, the space utilization rate inside the whole machine can be improved.

[0071] According to some embodiments of the present invention, the second sealing flange 44 is located outside the muffler cavity 41. This facilitates the sealing cooperation between the first sealing flange 27 and the second sealing flange 44, and at the same time, it can make the muffler cavity 41 have a larger space, thereby ensuring the noise reduction effect of the muffler cavity 41.

[0072] According to some embodiments of the present invention, the upper edge and the lower edge of the cover body 42 are both formed with a first sealing flange 27, and two second sealing flanges 44 are formed on the volute body 13 and are spaced apart in the up-down direction. When the muffler 40 is assembled with the volute body 13, the first sealing flange 27 of the upper edge of the cover body 42 of the muffler 40 cooperates with the second sealing flange 44 located above, and the first sealing flange 27 of the lower edge of the cover body 42 of the muffler 40 cooperates with the second sealing flange 44 located below. After the muffler 40 is assembled with the volute body 13, the sealing effect of the cooperation between the two first sealing flanges 27 and the two second sealing flanges 44 is good, thereby ensuring the sealing effect of the muffler 40 and the volute.

[0073] According to some embodiments of the present invention, the muffler cover 40 is detachably connected to the volute body 13. The muffler cover 40 is detachable from the volute body 13, so that the maintenance and replacement of the muffler cover 40 can be facilitated.

[0074] Optionally, the silencer cover 40 and the volute body 13 may be connected by fasteners.

[0075] Optionally, the silencer cover 40 and the volute body 13 can be connected by snapping by providing a slot and a buckle.

[0076] According to some embodiments of the present invention, a connecting lug 46 is formed on the muffler 40, a fixing column 28 is formed on the volute body 13, and a fastener is inserted through the connecting lug 46 and the corresponding fixing column 28. By inserting the fastener through the connecting lug 46 of the muffler 40 and the corresponding fixing column 28 of the volute body 13, the muffler 40 can be fixed to the volute body 13, and the connection process is relatively simple. At the same time, this connection method can facilitate the disassembly of the muffler 40. In addition, the connecting lug 46 is provided on the muffler 40 and the fixing column 28 is provided on the volute body 13. During the assembly process of the volute body 13 and the muffler 40, the connecting lug 46 and the corresponding fixing column 28 can play a positioning role, thereby facilitating the assembly of the volute body 13 and the muffler 40.

[0077] Optionally, the number of the connecting lugs 46 and the number of the fixing posts 28 are the same and correspond one to one, and the number of the connecting lugs 46 and the number of the fixing posts 28 are both plural.

[0078] For example, refer to Figure 6-Figure 8 Three connecting lugs 46 are formed on the silencer cover 40 , and three fixing columns 28 are formed on the volute body 13 . The three connecting lugs 46 correspond to the three fixing columns 28 one by one.

[0079] According to some embodiments of the present invention, the volute body 13 includes a detachably connected volute body 50 and an air inlet cover plate 60, one axial side of the volute body 50 is open, the air inlet cover plate 60 is covered on the open side of the volute body 50, and an air flow inlet 21 is formed on the air inlet cover plate 60. The volute body 13 and the air inlet cover plate 60 are detachably connected, which facilitates the disassembly and assembly of the wind wheel 11 installed in the wind wheel cavity 22, thereby facilitating the maintenance and replacement of the wind wheel 11.

[0080] The volute body 50 includes the volute portion 20 and a part of the air outlet portion 24, and the air inlet cover plate 60 includes the volute portion 20 and another part of the air outlet portion 24. After the volute body 50 and the air inlet cover plate are assembled, the volute portion 20 and the air outlet portion 24 are defined together, and the air outlet portion 24 defines an air outlet channel 26. The airflow flows into the air outlet channel 26 under the action of the wind wheel 11 and flows out at the airflow outlet 25.

[0081] The open side of the volute body 50 is formed with a first connection flange 51, which can improve the structural strength of the volute body 50 to a certain extent, and the air inlet cover plate 60 is formed with a second connection flange 61, which can improve the structural strength of the air inlet cover plate 60 to a certain extent. The first connection flange 51 is connected to the second connection flange 61, which facilitates the connection between the volute body 50 and the air inlet cover plate 60.

[0082] Among them, the first connecting flange 51 and the second connecting flange 61 can be sealed together, which can improve the sealing effect between the volute body 50 and the air inlet cover 60, thereby avoiding the air loss caused by air leakage from the connection between the volute body 50 and the air inlet cover 60, thereby ensuring the air output effect of the air outlet part 24.

[0083] The muffler hole structure 30 is formed on the volute body 50, and the muffler cover 40 is installed on the volute body 50. The volute body 50 has a large space, which can facilitate the arrangement of the muffler hole structure 30. The muffler cover 40 is installed on the volute body 50 and covers the surrounding part of the muffler hole structure 30, which can ensure the noise reduction effect of the muffler cover 40.

[0084] In some embodiments of the present invention, the volute body 50 and the air inlet cover plate 60 may be connected by fasteners, for example, the first connecting flange 51 and the second connecting flange 61 are connected by fasteners.

[0085] For example, refer to Figure 5, first connecting flanges 51 are formed on the left and right sides of the volute body 50, and connecting columns 52 are arranged on the first connecting flanges 51. Second connecting flanges 61 are formed on the left and right sides of the air inlet cover plate 60, and connecting holes 62 are arranged at corresponding positions of the second connecting flanges 61. By inserting fasteners through the connecting holes 62 of the air inlet cover plate 60 and the corresponding connecting columns 52 of the volute body, the volute body 50 can be connected with the air inlet cover plate 60. The connection process is relatively simple. At the same time, this connection method can facilitate the disassembly of the air inlet cover plate 60. In addition, the connecting holes 62 are arranged on the air inlet cover plate 60 and the connecting columns 52 are arranged on the volute body 50. During the assembly process of the air inlet cover plate 60 and the volute body 50, the connecting holes 62 and the corresponding connecting columns 52 can play a positioning role, thereby facilitating the assembly of the air inlet cover plate 60 and the volute body 50.

[0086] According to some embodiments of the present invention, the muffler 40 is connected to the first connection flange 51. By connecting the muffler 40 to the first connection flange 51, it is convenient to fix the muffler 40 on the volute body 13, and the muffler 40 is connected and fixed by using the first connection flange 51 of the volute body 13 itself, and the connection flange separately provided for connecting and fixing the muffler 40 can be omitted, so that the structure is simple and the connection and fixing are convenient.

[0087] According to some embodiments of the present invention, the cover body 42 extends along the circumference of the air outlet 24, and the muffler cover 40 surrounds at least half of the circumference of the air outlet 24. By making the muffler cover 40 surround the air outlet 24 with a longer length in the circumferential direction, it is possible to ensure that the cover body 42 of the muffler cover 40 has a larger coverage area on the air outlet 24, thereby greatly improving the noise reduction effect of the muffler cover 40 on the air outlet 24.

[0088] According to some embodiments of the present invention, the cover 42 includes a plurality of sub-covers 43 extending along the circumference of the air outlet 24, and the plurality of sub-covers 43 are respectively located at different sides of the air outlet 24, and two adjacent sub-covers 43 are connected at an angle. The plurality of sub-covers 43 at different positions are arranged at different positions of the air outlet 24, so that different positions of the air outlet 24 can be covered by the silencer cover 40, so that noise reduction and silencing can be achieved at each position of the air outlet 24.

[0089] In addition, by connecting the multiple sub-cover bodies 43 into a whole, the installation process of the silencer cover 40 can be simplified, so that the silencer cover 40 can be installed or disassembled as a whole, which is more convenient.

[0090] It should be noted that the term “plurality” in the present invention refers to two or more.

[0091] For example, refer to Figure 3 , Figure 5 as well as Figure 7The cover body 42 includes three sub-cover bodies 43 extending along the circumference of the air outlet portion 24. The three sub-cover bodies 43 are respectively located on different sides of the air outlet portion 24, so that the cover body 42 has a larger covering area for the air outlet portion 24, thereby improving the noise reduction effect.

[0092] According to some embodiments of the present invention, the multiple sub-covers 43 of the muffler cover 40 are integrally formed. The multiple sub-covers 43 are integrally formed to form the cover 42, the processing process is relatively simple, the overall structural strength of the cover 42 is relatively high, and at the same time, the sealing of the cover 42 can be ensured, thereby ensuring the noise reduction effect of the muffler cover 40 on the air outlet 24.

[0093] According to some embodiments of the present invention, the side wall of the air outlet portion 24 includes a bent side wall 241 extending in a non-linear manner in the up-down direction, the bent side wall 241 is formed with a sound-absorbing hole structure 30, and the cover body 42 includes a bent portion 45, and the bent portion 45 is covered on the bent side wall 241 to adapt to the bent side wall 241. By setting the side wall of the air outlet portion 24 to include a bent side wall 241 extending in a non-linear manner in the up-down direction, the bent side wall 241 is formed with a sound-absorbing hole structure 30, and the bent side wall 241 has a larger area relative to the straight wall, so that a sound-absorbing hole structure 30 with a larger area can be arranged, so that more noise in the air outlet portion 24 can enter the sound-absorbing cavity 41 of the sound-absorbing cover 40 through the sound-absorbing hole structure 30 with a larger area for sound-absorbing and noise reduction.

[0094] At the same time, the cover body 42 is configured to include a bending portion 45, which matches the bent side wall 241 of the air outlet portion 24, so that the shape of the cover body 42 matches the shape of the air outlet portion 24, so that the distance between the air outlet portion 24 and the inner wall of the cover body 42 can be substantially straight, so that the noise reduction effect is more uniform.

[0095] According to some embodiments of the present invention, the muffler cover 40 is an integrally formed part. Thus, the processing and forming process of the muffler cover 40 is simple. For example, the cover body 42, the second sealing flange 44 and the connecting lug 46 of the muffler cover 40 are integrally formed, and the overall structural strength of the integrally formed muffler cover 40 is high, and the processing process is relatively simple. At the same time, the integrally formed muffler cover 40 has a good sealing effect, which can ensure the noise reduction effect of the muffler cover 40 on the air outlet 24.

[0096] According to some embodiments of the present invention, an extension plate 29 is connected to the outer peripheral side of the airflow outlet 25, the extension plate 29 is adjacent to the volute tongue 23 of the volute portion 20, and the extension plate 29 is formed with a silencer hole structure 30. The extension plate 29 connected to the outer peripheral side of the airflow outlet 25 can guide the airflow, so that the airflow flows toward the airflow outlet 25. At the same time, the airflow speed at the airflow outlet 25 is fast, and the noise generated is large. By arranging the extension plate 29 on the outer peripheral side of the airflow outlet 25 and arranging the silencer hole structure 30 on the extension plate 29, the noise reduction effect can be further improved.

[0097] According to some embodiments of the present invention, the muffler hole structure 30 is formed as a grille structure 31, and the grille structure 31 includes a plurality of intersecting grille ribs 32. The grille structure 31 includes a plurality of intersecting grille ribs 32, and the noise in the air outlet 24 can be transmitted through the gaps between the grille ribs 32. In addition, by forming the muffler hole structure 30 as the grille structure 31, it is convenient to process and manufacture the muffler hole structure 30, and the muffler hole structure 30 has a larger hollow area, so that more noise or airflow in the air outlet 24 can flow into the muffler cavity 41 of the muffler cover 40 through the muffler hole structure 30 for noise reduction, further improving the noise reduction effect.

[0098] According to some embodiments of the present invention, the width S of the grille ribs 32 (see Fig. 9 ) is 2 to 5 mm. For example, the width S of the grille rib 32 can be 2 mm, 3 mm, 4 mm, 5 mm, etc. If the width of the grille rib 32 is less than 2 mm, the width of the grille rib 32 will be smaller, so that the overall structural strength of the grille structure 31 is lower, and the wind speed of the airflow at the silencer hole structure 30 is faster, which easily causes the grille structure 31 to deform; if the width of the grille rib 32 is greater than 5 mm, the width of the grille rib 32 will be larger, which is not conducive to the passage of noise in the air outlet 24 and affects the noise reduction effect.

[0099] By setting the width of the grille ribs 32 to 2-5 mm, the overall structural strength of the grille structure 31 can be ensured, and at the same time, the hollow area of ​​the silencer hole structure 30 can be ensured, thereby ensuring the noise reduction effect.

[0100] According to some embodiments of the present invention, the thickness of the grille rib 32 is 2 to 4 mm. For example, the thickness of the grille rib 32 can be 2 mm, 3 mm, 4 mm, etc. If the thickness of the grille rib 32 is less than 2 mm, the thickness of the grille rib 32 will be small, so that the overall structural strength of the grille structure 31 is low, and the wind speed of the airflow at the muffler hole structure 30 is fast, which easily causes the grille structure 31 to deform; if the thickness of the grille rib 32 is greater than 4 mm, the thickness of the grille rib 32 will be large, resulting in a large space occupancy rate of the volute body 13.

[0101] By setting the thickness of the grille ribs 32 to 2-4 mm, the overall structural strength of the grille structure 31 can be ensured, and at the same time, the space utilization rate inside the whole machine can be improved.

[0102] According to some embodiments of the present invention, the width of the grille rib 32 is 2 to 5 mm, and the thickness of the grille rib 32 is 2 to 4 mm. For example, the width of the grille rib 32 can be 2 mm, 3 mm, 4 mm, 5 mm, etc., and the thickness of the grille rib 32 can be 2 mm, 3 mm, 4 mm, etc. If the width of the grille rib 32 is less than 2 mm, the width of the grille rib 32 will be smaller, so that the overall structural strength of the grille structure 31 is lower, and the wind speed of the airflow at the muffler hole structure 30 is faster, which easily causes the grille structure 31 to deform; if the width of the grille rib 32 is greater than 5 mm, the width of the grille rib 32 will be larger, which is not conducive to the passage of noise in the air outlet 24 and affects the noise reduction effect.

[0103] If the thickness of the grille rib 32 is less than 2 mm, the thickness of the grille rib 32 will be smaller, so that the overall structural strength of the grille structure 31 is lower, and the wind speed of the airflow at the silencer hole structure 30 is faster, which easily causes the grille structure 31 to deform; if the thickness of the grille rib 32 is greater than 4 mm, the thickness of the grille rib 32 will be larger, resulting in a larger space occupancy rate of the volute body 13.

[0104] By setting the width of the grille ribs 32 to 2-5 mm and the thickness of the grille ribs 32 to 2-4 mm, the overall structural strength of the grille structure 31 can be ensured, and the noise reduction effect can be ensured. At the same time, the space utilization rate inside the whole machine can be improved.

[0105] According to some embodiments of the present invention, the thickness U of the cover body 42 (refer to Fig. 9 )) is 0.4 to 4 mm. For example, the thickness U of the cover body 42 can be 0.4 mm, 1.4 mm, 2.4 mm, 3 mm, 4 mm, etc. If the thickness of the cover body 42 is less than 0.4 mm, the thickness of the cover body 42 will be small, resulting in a low structural strength of the cover body 42; if the thickness of the cover body 42 is greater than 4 mm, the thickness of the cover body 42 will be large, resulting in a thicker thickness of the cover body 42, occupying a larger space, and in the case of limited assembly space, the space of the silencer cavity 41 will also be small, thereby affecting the noise reduction effect of the silencer cover 40 on the air outlet 24.

[0106] By setting the thickness of the cover body 42 to 0.4-4 mm, the cover body 42 can have a higher structural strength, and at the same time, it can ensure that the silencer cavity 41 has a larger space, thereby ensuring the noise reduction effect of the silencer cover 40 on the air outlet 24.

[0107] According to some embodiments of the present invention, the gap T between the cover 42 and the volute body 13 (refer to Fig. 9 ) is 5 to 100 mm. For example, the gap T between the cover body 42 and the volute body 13 can be 5 mm, 20 mm, 50 mm, 80 mm, 100 mm, etc. If the gap between the cover body 42 and the volute body 13 is less than 5 mm, the gap between the cover body 42 and the volute body 13 will be smaller, resulting in a smaller space in the silencer cavity 41, thereby affecting the noise reduction effect of the silencer cover 40 on the air outlet 24; if the gap between the cover body 42 and the volute body 13 is greater than 100 mm, the gap between the cover body 42 and the volute body 13 will be larger, resulting in a larger space occupancy rate of the cover body 42, thereby resulting in a larger space occupancy rate of the air duct volute 12.

[0108] By setting the gap between the cover body 42 and the volute body 13 to 5-100 mm, it is possible to ensure that the silencer chamber 41 has a larger space, thereby ensuring the noise reduction effect of the silencer cover 40 on the air outlet 24, and at the same time, it is possible to improve the space utilization rate inside the entire machine.

[0109] According to some embodiments of the present invention, the muffler hole structure 30 extends upward to the edge of the airflow outlet 25, and the height dimension of the muffler hole structure 30 in the vertical direction is H1 (refer to Figure 6 ), the airflow outlet 25 and the central axis plane L of the volute portion 20 (refer to Figure 6 ) in the vertical direction is H2 (refer to Figure 6 ), the central axis plane passes through the central axis of the volute part 20 and is parallel to the horizontal plane, and the ratio of H1 to H2 ranges from 1 / 3 to 1. For example, the ratio of H1 to H2 can be 1 / 3, 2 / 5, 2 / 3, 1, etc. If the ratio of H1 to H2 is less than 1 / 3, the height dimension of H1 will be relatively low, so that the silencing area of ​​the silencer hole structure 30 will be relatively small, thereby affecting the noise reduction effect; if the ratio of H1 to H2 is greater than 1, the height dimension of H1 will be relatively large, so that the range of the silencing hole structure 30 will be relatively large, thereby resulting in a relatively low overall structural strength of the volute body 13.

[0110] By setting the ratio of H1 to H2 to 1 / 3 to 1, the silencing area of ​​the silencing hole structure 30 can be made larger, thereby ensuring the noise reduction effect. At the same time, the overall structural strength of the volute body 13 can be ensured to be high.

[0111] It should be noted that when the wind wheel 11 is placed in the volute portion 20 , the central axis of the volute portion 20 coincides with the central axis of the wind wheel 11 .

[0112] According to some embodiments of the present invention, a sound absorbing material 70 is provided in the silencer cavity 41. The sound absorbing material 70 is sandwiched between the volute body 13 and the silencer cover 40, and the sound absorbing material can be coated on the silencer hole structure 30. The noise generated by the air outlet 24 can enter the silencer cavity 41 through the silencer hole structure 30, and the silencer material can absorb the noise transmitted from the silencer hole structure 30, thereby achieving the effect of reducing noise.

[0113] Optionally, the sound absorbing material 70 may be a sponge material, a flannel material, or the like.

[0114] Optionally, the sound absorbing material 70 can be manufactured according to the shape of the sound absorbing cover 40 to facilitate the assembly of the sound absorbing cover 40 and the sound absorbing material 70 .

[0115] Optionally, the thickness of the sound absorbing material 70 can be slightly larger than the distance between the sound absorbing cover and the volute body 13, and the compressibility of the sound absorbing material 70 can be used to ensure the sealing effect, thereby ensuring the noise reduction effect while avoiding air leakage at the position of the silencer hole structure 30.

[0116] The fan component 10 according to the second embodiment of the present invention includes: the wind duct volute 12 according to the first embodiment of the present invention and the wind wheel 11, the wind wheel 11 is arranged in the volute part 20, and the wind wheel 11 can suck in air and then blow it out at an accelerated speed.

[0117] According to the fan component 10 of the embodiment of the present invention, by setting the above-mentioned air duct volute 12, by setting a silencer hole in the air outlet part 24 of the air duct volute 12, so that the silencer cover 40 is arranged on the surrounding part of the silencer hole structure 30, the noise generated by the air outlet part 24 can be transmitted to the silencer cavity 41 of the silencer cover 40 through the silencer hole structure 30 for noise reduction treatment, which can reduce the noise generated during the operation of the wind wheel 11; in addition, through the sealing cooperation between the second sealing flange 44 on the silencer cover 40 and the first sealing flange 27 on the volute body 13, the sealing effect between the silencer cover 40 and the volute body 13 can be improved, thereby further improving the noise reduction effect.

[0118] An air treatment device according to an embodiment of a third aspect of the present invention comprises: a fan component 10 according to an embodiment of the second aspect of the present invention.

[0119] The air handling device may have at least one of the functions of fresh air, purification, humidification and temperature control.

[0120] For example, the air treatment device may be a fresh air fan, and the air treatment device has a fresh air function; the air treatment device may be an air purifier, and the air treatment device has a purification function; the air treatment device may be a humidifier, and the air treatment device has a humidification function; the air treatment device may be an air conditioner, and the air treatment device has a temperature regulation function.

[0121] For example, in some embodiments of the present invention, the air handling device is an air conditioner, and the air handling device includes a housing 101, a heat exchange and air supply unit 108, and an air handling unit 102. The housing 101 has a first accommodating chamber 103 and a second accommodating chamber 104 arranged in the up-down direction, wherein the first accommodating chamber 103 may be located above the second accommodating chamber 104, the heat exchange and air supply unit 108 is located in the first accommodating chamber 103, and the air handling unit 102 is located in the second accommodating chamber 104. The side wall of the first accommodating chamber 103 is formed with a first air inlet 105 and a first air outlet 106, and the side wall of the second accommodating chamber 104 is formed with a second air inlet and a second air outlet.

[0122] The heat exchange and air supply unit 108 may include a heat exchanger component and a first fan component, and the air handling unit 102 may include a second fan component 107, which may be the fan component 10 of the second embodiment. The air handling unit 102 may have at least one of the functions of fresh air, purification, and humidification.

[0123] According to the air treatment device of the embodiment of the present invention, by setting the above-mentioned fan component 10, by setting a silencer hole on the air outlet portion 24 of the air duct volute 12 of the fan component 10, the silencer cover 40 is arranged on the surrounding part of the silencer hole structure 30, and the noise generated by the air outlet portion 24 can be transmitted to the silencer cavity 41 of the silencer cover 40 through the silencer hole structure 30 for noise reduction treatment, which can reduce the noise generated during the operation of the wind wheel 11; in addition, through the sealing cooperation between the second sealing flange 44 on the silencer cover 40 and the first sealing flange 27 on the volute body 13, the sealing effect between the silencer cover 40 and the volute body 13 can be improved, thereby further improving the noise reduction effect.

[0124] Refer to the following Figure 1-Figure 11 Air handling devices according to some embodiments of the present invention are described.

[0125] Reference Figure 1-Figure 11 The air handling device is a split floor-standing air conditioner, which includes an air conditioner indoor unit 100 and an air conditioner outdoor unit. The air conditioner indoor unit 100 includes a housing 101, a heat exchange and air supply unit 108, and an air handling unit 102. The housing 101 has a first accommodating chamber 103 and a second accommodating chamber 104 arranged in the up-down direction, wherein the first accommodating chamber 103 can be located above the second accommodating chamber 104, the heat exchange and air supply unit 108 is located in the first accommodating chamber 103, and the air handling unit 102 is located in the second accommodating chamber 104. The side wall of the first accommodating chamber 103 is formed with a first air inlet 105 and a first air outlet 106, and the side wall of the second accommodating chamber 104 is formed with a second air inlet and a second air outlet.

[0126] The heat exchange and air supply unit 108 may include a heat exchanger component and a first fan component. The heat exchange and air supply unit 108 has an air conditioning function. The airflow enters from the first air inlet 105 and flows out from the first air outlet 106 after being processed by the heat exchanger component, thereby realizing the cooling or heating function of the heat exchange and air supply unit 108. The air handling unit 102 includes a second fan component 107. The second fan component 107 is the fan component 10 of the above-mentioned second embodiment. The air handling unit 102 has a fresh air and purification function. The airflow enters from the second air inlet and flows out from the second air outlet after being purified, thereby realizing the fresh air and purification function of the air handling unit 102.

[0127] The second fan component 107 includes a wind wheel 11 and an air duct volute 12 . The air duct volute 12 includes a volute body 13 and a silencer cover 40 .

[0128] The volute body 13 includes a volute portion 20 and an air outlet portion 24. The volute portion 20 is used to accommodate the wind wheel 11 and has an airflow inlet 21. The air outlet portion 24 has an airflow outlet 25. A silencer hole structure 30 is formed on the air outlet portion 24. The silencer hole structure 30 penetrates the air outlet portion 24 along the wall thickness direction of the air outlet portion 24. A first sealing flange 27 is formed on the volute body 13. A wind wheel cavity 22 for accommodating the wind wheel 11 is defined in the volute portion 20. An airflow inlet 21 connected to the wind wheel cavity 22 is formed on the volute portion 20. An air outlet channel 26 connected to the wind wheel cavity 22 is defined in the air outlet portion 24. The air outlet channel 26 has an airflow outlet 25.

[0129] The volute body 13 is connected by a volute body 50 and an air inlet cover plate 60 through fasteners. Two connecting posts 52 are respectively provided on the left and right sides of the volute body 50, and the air inlet cover plate 60 is provided with two connecting holes 62 at corresponding positions. By inserting the fasteners through the connecting holes 62 of the air inlet cover plate 60 and the corresponding connecting posts 52 of the volute body, the connection operation of the volute body 50 and the air inlet cover plate 60 can be completed.

[0130] A first connecting flange 51 is formed on the open side of the volute body 50 , a second connecting flange 61 is formed on the air inlet cover 60 , the first connecting flange 51 is connected to the second connecting flange 61 , a silencer hole structure 30 is formed on the volute body 50 , and a silencer cover 40 is installed on the volute body 50 .

[0131] The silencer cover 40 is arranged around the silencer hole structure 30 and defines a silencer chamber 41 between the silencer cover 40 and the volute body 13. The silencer cover 40 includes a cover body 42 and a second sealing flange 44. The second sealing flange 44 is connected to the edge of the cover body 42. The first sealing flange 27 and the second sealing flange 44 are matched by abutment sealing.

[0132] The upper and lower edges of the cover body 42 are both formed with a first sealing flange 27, and the volute body 13 is formed with two second sealing flanges 44 spaced apart in the up-down direction. The muffler cover 40 is formed with three connecting lugs 46, and the volute body 13 is formed with three fixing columns 28, and fasteners are passed through the connecting lugs 46 and the corresponding fixing columns 28.

[0133] The cover body 42 includes a plurality of sub-cover bodies 43 extending along the circumference of the air outlet 24. The plurality of sub-cover bodies 43 are respectively located on different sides of the air outlet 24. Two adjacent sub-cover bodies 43 are connected at an angle. The plurality of sub-cover bodies 43 are integrally formed. The sub-cover body 43 located at the front side includes two cover plates arranged in the up-down direction. The two cover plates are connected and arranged at an angle. The silencer cover 40 is an integrally formed part.

[0134] An extension plate 29 is connected to the outer peripheral side of the airflow outlet 25. The extension plate 29 is adjacent to the volute tongue 23 of the volute portion 20 and is formed with a muffler hole structure 30. The muffler hole structure 30 is formed as a grille structure 31, and the grille structure 31 includes a plurality of intersecting grille ribs 32.

[0135] A sound absorbing material 70 is disposed in the sound absorbing cavity 41 . The sound absorbing material 70 is sandwiched between the volute body 13 and the sound absorbing cover 40 , and the sound absorbing material covers the sound absorbing hole structure 30 .

[0136] For example, when the air handling unit 102 of the air conditioner is working, the impeller 11 of the second fan component 107 starts to run at a high speed, sucking the external airflow into the air duct volute 12 through the second air inlet and the airflow inlet 21, and collecting the sucked airflow in the air outlet 26, and finally accelerating it to blow it to the air duct at the airflow outlet 25, and blowing it out from the second air outlet after purification, thereby achieving at least one of the functions of fresh air, purification, and humidification. In this process, the noise generated by the airflow at the air outlet 24 is transmitted to the sound absorbing material 70 through the silencer hole structure 30, and the sound absorbing material 70 can absorb the noise passing through the silencer hole structure 30, thereby achieving the effect of reducing noise. As a result, the fan component 10 has less noise during operation.

[0137] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0138] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A duct volute, characterized in that: include: The volute body comprises a volute portion and an air outlet portion, wherein the volute portion is used to accommodate the wind wheel and has an airflow inlet, the air outlet portion has an airflow outlet, at least a muffler hole structure is formed on the air outlet portion, the muffler hole structure penetrates the air outlet portion along the wall thickness direction of the air outlet portion, and a first sealing flange is formed on the volute body; A silencer cover is arranged around the silencer hole structure and defines a silencer cavity between the cover and the volute body. The silencer cover includes a cover body and a second sealing flange. The second sealing flange is connected to the edge of the cover body. The first sealing flange is sealed with the second sealing flange.

2. The air duct volute according to claim 1, characterized in that: The sealing cooperation between the first sealing flange and the second sealing flange includes: the first sealing flange abuts against the second sealing flange or a sealing structure is provided between the first sealing flange and the second sealing flange.

3. The air duct volute according to claim 1, characterized in that: The flange width of the first sealing flange and / or the second sealing flange is 5 to 20 mm.

4. The air duct volute according to claim 1, characterized in that: The second sealing flange is located outside the muffler cavity.

5. The air duct volute according to claim 1, characterized in that: The first sealing flanges are formed on the upper edge and the lower edge of the cover body, and the volute body is formed with two second sealing flanges spaced apart in the up-down direction.

6. The air duct volute according to claim 1, characterized in that: The silencer cover is detachably connected to the volute body.

7. The air duct volute according to claim 6, characterized in that: A connecting lug is formed on the muffler cover, a fixing column is formed on the volute body, and a fastener is passed through the connecting lug and the corresponding fixing column.

8. The air duct volute according to claim 1, characterized in that: The volute body comprises a detachably connected volute body and an air inlet cover plate, one axial side of the volute body is open, the air inlet cover plate is arranged on the open side of the volute body, the air flow inlet is formed on the air inlet cover plate, the volute body comprises the volute part and a part of the air outlet part, and the air inlet cover plate comprises the volute part and another part of the air outlet part; The open side of the volute body is formed with a first connecting flange, the air inlet cover is formed with a second connecting flange, the first connecting flange is connected to the second connecting flange, the silencer hole structure is formed in the volute body, and the silencer cover is installed on the volute body.

9. The air duct volute according to claim 8, characterized in that: The soundproof cover is connected to the first connecting flange.

10. The air duct volute according to claim 1, characterized in that: The cover body extends along the circumference of the air outlet portion, and the silencer cover at least surrounds half of the circumference of the air outlet portion.

11. The air duct volute according to claim 1, characterized in that: The cover body includes a plurality of sub-cover bodies extending along the circumference of the air outlet portion, the plurality of sub-cover bodies are respectively located at different sides of the air outlet portion, and two adjacent sub-cover bodies are connected to each other with an angle therebetween.

12. The air duct volute according to claim 11, characterized in that: The plurality of sub-cover bodies are integrally formed.

13. The air duct volute according to claim 1, characterized in that: The side wall of the air outlet portion includes a bent side wall extending non-linearly in the up and down directions, the bent side wall is formed with the muffler hole structure, and the cover body includes a bent portion, and the bent portion is covered on the bent side wall to adapt to the bent side wall.

14. The air duct volute according to claim 1, characterized in that: The muffler cover is an integrally formed part.

15. The air duct volute according to claim 1, characterized in that: An extension plate is connected to the outer peripheral side of the airflow outlet, and the extension plate is adjacent to the volute tongue of the volute portion and is formed with the muffler hole structure.

16. The air duct volute according to claim 1, characterized in that: The muffler hole structure is formed as a grille structure, and the grille structure includes a plurality of intersecting grille ribs, and the width of the grille ribs is 2 to 5 mm and / or the thickness of the grille ribs is 2 to 4 mm.

17. The air duct volute according to claim 1, characterized in that: The thickness of the cover body is 0.4-4 mm.

18. The air duct volute according to claim 1, characterized in that: The gap between the cover body and the volute body is 5 to 100 mm.

19. The air duct volute according to claim 1, characterized in that: The silencer hole structure extends upward to the edge of the airflow outlet, the height dimension of the silencer hole structure in the up-down direction is H1, the distance between the airflow outlet and the central axis plane of the volute part in the up-down direction is H2, the ratio range of H1 to H2 is 1 / 3 to 1, and the central axis plane passes through the central axis of the volute part and is parallel to the horizontal plane.

20. The air duct volute according to any one of claims 1 to 19, characterized in that: The silencing cavity is provided with sound absorbing material.

21. A fan component, characterized in that: include: The air duct volute according to any one of claims 1 to 20; The wind wheel is arranged in the volute part.

22. An air treatment device, characterized in that: include: A fan component according to claim 21.

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