Air duct assembly, air wheel assembly and electric heater

Abstract

The present application relates to a kind of air duct assembly, wind wheel assembly and electric heater.Wind duct assembly includes volute tongue, its inside has accommodating cavity, volute tongue is equipped with with the open mouth of communicating with accommodating cavity;And volute, is installed at open mouth;Wherein, the volute tongue includes multiple side plates, two the side plate of opposite direction respectively with volute is resisted, to make volute along the first direction support volute tongue;The side plate of the volute tongue is equipped with first positioning part, and the volute is equipped with with the second positioning part of first positioning part adaptation, to make volute along the second direction positioning volute.The wind duct assembly, wind wheel assembly and electric heater provided by the present application, by the cooperation between volute tongue and volute, can inhibit the deformation caused by volute tongue material and structure with accommodating cavity and open mouth, and also can inhibit the deformation caused by volute material and structure, so overall structural deformation is small, noise is small, improves user experience.

Description

Technical Field

[0001] This invention relates to the field of household appliance technology, and in particular to a duct assembly, a fan assembly, and an electric heater. Background Technology

[0002] Electric heaters can be categorized into centrifugal, cross-flow, and axial types based on their impeller and air intake / exhaust methods. Cross-flow electric heaters, in particular, can be designed in various sizes and heights, including tower-style models, to accommodate both single and multi-person use, making them more popular with families.

[0003] Typically, the air ducts of wind turbines on the market use high-molecular materials such as ABS. These materials are moderately priced, have good properties and minimal deformation, but they lack sound absorption and are prone to generating significant noise. Another material, PP-GF, has good sound absorption and generates less noise, but the air duct structure made from this material is prone to deformation, which will lead to increased noise. Summary of the Invention

[0004] Therefore, it is necessary to provide a low-noise air duct assembly, impeller assembly, and electric heater to address the problem of high noise levels caused by the existing air duct structure of electric heaters.

[0005] According to one aspect of this application, a duct assembly is provided, comprising:

[0006] A volute tongue, having an internal receiving cavity, wherein the volute tongue has an opening communicating with the receiving cavity; and

[0007] The volute is installed at the opening;

[0008] The volute tongue includes multiple side plates, with two side plates facing each other along a first direction abutting against the volute shell, so that the volute shell supports the volute tongue along the first direction.

[0009] The volute tongue is provided with a first positioning part on its side plate, and the volute shell is provided with a second positioning part that is adapted to the first positioning part, so that the volute tongue positions the volute shell along the second direction;

[0010] The second direction is perpendicular to the first direction.

[0011] In one embodiment, the first positioning portion includes a first sub-positioning portion located on the side plate along the second direction; and / or

[0012] The first positioning part includes a second sub-positioning part, which is located on the side plate along the first direction.

[0013] In one embodiment, when the first positioning part (including the second sub-positioning part) is present, the second sub-positioning part includes at least two second sub-positioning parts located on two opposite side plates along the first direction.

[0014] In one embodiment, when the first positioning part includes the first sub-positioning part and the second sub-positioning part, the first sub-positioning part and the second sub-positioning part are spaced apart along a third direction;

[0015] Wherein, the first direction, the second direction, and the third direction are perpendicular to each other.

[0016] In one embodiment, one of the first positioning portion and the second positioning portion includes a positioning groove, and the other of the first positioning portion and the second positioning portion includes a positioning protrusion adapted to the positioning groove.

[0017] In one embodiment, the positioning groove extends continuously along the first direction.

[0018] In one embodiment, the positioning groove includes a plurality of sub-positioning grooves, which are spaced apart along the first direction.

[0019] In one embodiment, the positioning groove includes a first sidewall and a second sidewall disposed opposite to each other. The first sidewall includes a plurality of first sub-sidewalls, which are spaced apart along the first direction, and the second sidewall extends continuously along the first direction.

[0020] In one embodiment, the positioning protrusion extends continuously along the first direction.

[0021] In one embodiment, the side plate of the volute tongue is provided with a first auxiliary positioning part, and the volute shell is provided with a second auxiliary positioning part. The first auxiliary positioning part and the second auxiliary positioning part cooperate to position the volute shell relative to the volute tongue along the first direction and the second direction.

[0022] In one embodiment, the center of the second auxiliary positioning part coincides with the center line of the volute parallel to a third direction;

[0023] Wherein, the first direction, the second direction, and the third direction are perpendicular to each other.

[0024] In one embodiment, the volute tongue is further provided with a first connecting portion, and the volute shell is provided with a second connecting portion. The first connecting portion and the second connecting portion cooperate to connect the volute shell with the volute tongue.

[0025] In one embodiment, the air duct assembly further includes a wind turbine and a drive unit. The wind turbine is installed in the receiving cavity of the volute tongue along the first direction, and the drive unit is installed at one end of the volute tongue along the first direction. The drive unit is used to drive the wind turbine to rotate.

[0026] The side plate of the volute tongue is provided with a limiting rib, which protrudes from the end face of the side plate of the volute tongue along the first direction and is arranged around the driving member.

[0027] In another aspect, the present invention provides a wind turbine assembly, including a front shell assembly, a rear shell assembly, and a duct assembly as described above, wherein the front shell assembly and the rear shell assembly can be joined to form a receiving space for receiving the duct assembly.

[0028] In one embodiment, the volute tongue is provided with at least two first limiting portions, which are disposed on the side of the volute tongue facing the rear shell assembly, and are respectively disposed at both ends of the volute tongue;

[0029] The rear shell assembly is provided with at least two first mating parts, which respectively mate with the at least two first limiting parts to limit the volute tongue along the first direction in the rear shell assembly.

[0030] In one embodiment, the volute is provided with a second limiting portion, which is located on the side of the volute facing the rear shell assembly and is located in the middle of the volute along the first direction;

[0031] The rear housing assembly is provided with a second mating part, which cooperates with the second limiting part to provide a preload force that moves the volute from the mounting port toward the receiving cavity.

[0032] In one embodiment, the second positioning portion and the second limiting portion of the volute are spaced apart along a third direction.

[0033] In one embodiment, the volute tongue is provided with at least two third limiting portions, which are disposed on the side of the volute tongue facing the front shell assembly and on both sides of the volute tongue along the second direction;

[0034] The front shell assembly is provided with at least two third mating parts, which respectively mate with the at least two third limiting parts to limit the volute tongue along the second direction in the front shell assembly.

[0035] In one embodiment, the volute tongue is provided with a third positioning part, and the front shell assembly is provided with a fourth positioning part. The third positioning part and the fourth positioning part cooperate to position the volute tongue relative to the front shell assembly.

[0036] In one embodiment, the rear shell assembly is further provided with an anti-detachment part that abuts against the volute along the third direction to prevent the volute from detaching from the volute tongue at the opening;

[0037] Wherein, the first direction, the second direction, and the third direction are perpendicular to each other.

[0038] In one embodiment, the wind turbine assembly further includes a heating element assembly, which is installed within the receiving space and fixed to the front shell assembly.

[0039] In one embodiment, the volute abuts against the heating element assembly in a third direction;

[0040] Wherein, the first direction, the second direction, and the third direction are perpendicular to each other.

[0041] In another aspect, the present invention provides an electric heater including the aforementioned impeller assembly.

[0042] In the aforementioned air duct assembly, impeller assembly, and electric heater, after the volute tongue and volute shell are injection molded, the materials used are easily deformable, leading to deformation of the volute tongue and volute shell, especially at the opening, which can easily cause the volute tongue to collapse. By having two side plates opposite each other along the first direction abut against the volute shell, the volute tongue can be supported at the opening, thereby suppressing the deformation of the volute tongue along the first direction at the opening. Furthermore, by setting a first positioning part on the side plate of the volute tongue and a second positioning part on the volute shell that matches the first positioning part, the volute shell can reliably support the opening along the first direction while also suppressing the deformation of the volute shell along the second direction at the opening, and can also counteract and suppress the deformation of the volute tongue along the second direction at the opening. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the structure of the air duct assembly in one embodiment of the present invention;

[0044] Figure 2 for Figure 1 The diagram shows the structure of the volute tongue in the air duct assembly.

[0045] Figure 3 for Figure 1 A schematic diagram of the volute structure in the air duct assembly shown;

[0046] Figure 4 for Figure 1The diagram shows an exploded view of the air duct assembly.

[0047] Figure 5 for Figure 1 A schematic diagram of the cross-sectional structure of the air duct assembly shown;

[0048] Figure 6 for Figure 3 A schematic diagram of the volute in the air duct assembly from another perspective;

[0049] Figure 7 for Figure 3 A schematic diagram of the cross-sectional structure of the volute in the air duct assembly shown.

[0050] Figure 8 for Figure 2 A schematic diagram of the volute tongue in the air duct assembly from another perspective;

[0051] Figure 9 This is a schematic diagram of the wind turbine assembly in one embodiment of the present invention;

[0052] Figure 10 for Figure 9 The diagram shows a partial structural schematic of the wind turbine assembly.

[0053] Figure 11 for Figure 9 A schematic diagram of the cross-sectional structure of the wind turbine assembly shown;

[0054] Figure 12 for Figure 9 A cross-sectional view of the wind turbine assembly from another direction is shown. Detailed Implementation

[0055] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0057] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0059] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0060] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0061] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0062] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the components are shown in the drawings only as examples and not necessarily to actual scale.

[0063] Figure 1 A schematic diagram of the structure of an air duct assembly according to an embodiment of the present invention is shown; Figure 2 for Figure 1 The diagram shows the structure of the volute tongue in the air duct assembly. Figure 3 for Figure 1 The accompanying diagram shows a schematic representation of the volute in the air duct assembly. For ease of description, the diagram only shows structures relevant to embodiments of the present invention.

[0064] See Figures 1-3 One embodiment of this application provides an air duct assembly 100, including a volute tongue 10 and a volute housing 20.

[0065] The volute tongue 10 has a receiving cavity 11 inside, and the volute tongue 10 has an opening 12 that communicates with the receiving cavity 11. The volute housing 20 is installed at the opening 12. Specifically, the volute housing 20 is installed at the opening 12 to define the first air outlet for airflow with the volute tongue 10.

[0066] The volute tongue 10 includes multiple side plates 13. Two side plates 13 facing each other along the first direction abut against the volute housing 20, so that the volute housing 20 supports the volute tongue 10 along the first direction. The side plates 13 of the volute tongue 10 are provided with a first positioning part 14, and the volute housing 20 is provided with a second positioning part 21 adapted to the positioning part 14, so that the volute tongue 10 positions the volute housing 20 along the second direction, which is perpendicular to the first direction.

[0067] Thus, after the volute tongue 10 and volute housing 20 are injection molded, the materials used are easily deformable, causing the volute tongue 10 and volute housing 20 to be easily deformed, especially at the opening 12, which can easily lead to the collapse of the volute tongue 10. By having two side plates 13 that are opposite to each other along the first direction abut against the volute housing 20, the volute tongue 20 can be supported at the opening 12, thereby suppressing the deformation of the volute tongue 10 along the first direction at the opening 12. Furthermore, by providing a first positioning part 14 on the side plate 13 of the volute tongue 10 and a second positioning part 21 that is adapted to the first positioning part 14 on the volute housing 20, the volute housing 20 can reliably support the opening 12 along the first direction while also suppressing the deformation of the volute housing 20 along the second direction at the opening 12, and can also counteract and suppress the deformation of the volute tongue 10 along the second direction at the opening 12.

[0068] The air duct assembly 100 in this application, through the cooperation between the volute tongue 10 and the volute housing 20, can suppress the deformation caused by the accommodating cavity 11 and the opening 12 in the material and structure of the volute tongue 10, and at the same time, it can also suppress the deformation caused by the material and structure of the volute housing 20. Therefore, the air duct assembly 100 in this application has small overall structural deformation, thus generating less noise and improving the user experience.

[0069] In a preferred embodiment, the first direction is the longitudinal direction of the volute tongue 10 or the volute shell 20 (e.g., Figure 1 As shown in the X direction, when an opening 12 is made on the volute tongue 10, the deformation of the volute tongue 10 in its longitudinal direction is the greatest. Therefore, by having the volute shell 20 support the volute tongue 10 in its longitudinal direction, the deformation of the volute tongue 10 can be suppressed to the greatest extent, and the deformation of the volute shell 20 can also be suppressed. In other embodiments, other directions may also be used, which are not limited here.

[0070] like Figure 4 As shown in the embodiments of this application, the duct assembly 100 further includes a fan wheel 30 and a drive member 40. The fan wheel 30 may be a cross-flow fan blade, which is installed in the receiving cavity 11 of the volute tongue 10 along a first direction. The drive member 40 may be a motor, which is installed at one end of the volute tongue 10 along the first direction. The fan wheel 30 has a rotating shaft, one end of which is connected to the drive member 40 to drive the fan wheel 30 to rotate around the rotating shaft. The duct assembly 100 also includes a bearing seat 50 and a bearing 60. The bearing seat 50 is installed at the end of the volute tongue 10 away from the drive member 40 along the first direction. The bearing 60 is installed in the bearing seat 50. The other end of the rotating shaft is rotatably disposed in the bearing seat 50 through the bearing 60.

[0071] like Figure 5As shown, the bearing housing 50 can be a bearing rubber housing, which has good shock absorption properties and can effectively prevent damage to the impeller 30 when the duct assembly 100 falls during drop tests or use. Specifically, the volute 10 has a bearing housing mounting hole, and the bearing rubber housing is interference-fitted with the bearing housing mounting hole. In addition, one end of the bearing rubber housing has a snap fastener. The bearing housing mounting hole is a through hole with a first step and a second step. The first and second steps of the bearing rubber housing abut against each other, and the snap fastener of the bearing rubber housing extends out of the bearing mounting hole and abuts against the end face of the volute 10, so that the bearing rubber housing is upper limited in the first direction.

[0072] In some embodiments, the material of bearing 60 is PUM. PUM has good wear resistance, which makes it easy for bearing 60 to wear after long-term rotation between bearing 60 and bearing housing 50, and prevents the shaft from deviating. Therefore, the impeller 30 will not deviate and affect its normal rotation operation.

[0073] In the embodiments of this application, the materials of the volute tongue 10 and the volute shell 20 can be PP-GF material, which has good sound absorption effect and generates little noise.

[0074] Please refer to it again. Figure 1 In some embodiments, a limiting rib 131 is provided on the side plate 13 of the volute tongue 10. The limiting rib 131 protrudes from the end face of the side plate 13 of the volute tongue 10 along a first direction and surrounds the driving member 40. The limiting rib 131 can play a positioning role when the driving member 40 is installed to the volute tongue 10. In addition, it also plays a buffering role when the air duct assembly 100 falls, so as to avoid damage to the driving member 40.

[0075] In some embodiments, the volute tongue 10 has a first auxiliary positioning part 15 on its side plate 13, and the volute housing 20 has a second auxiliary positioning part 22 (e.g., ...). Figure 6 As shown, the first auxiliary positioning part 15 and the second auxiliary positioning part 22 cooperate to position the volute 20 relative to the volute tongue 10 along the first and second directions. The cooperation of the first auxiliary positioning part 15 and the second auxiliary positioning part 22 fixes the position of the volute 20 relative to the volute tongue 10, facilitating accurate subsequent engagement between the volute tongue 10 and the volute 20, thereby effectively suppressing deformation of the volute tongue 10 and the volute 20.

[0076] Furthermore, the center of the second auxiliary positioning part 22 coincides with the center line of the volute 20 parallel to a third direction, wherein the first direction, the second direction, and the third direction are perpendicular to each other. Thus, by placing the second auxiliary positioning part 22 in the middle of the volute 20, the stability of positioning is improved.

[0077] Specifically, the first auxiliary positioning part 15 is disposed on the side plate 13 opposite to the first air outlet along the second direction.

[0078] Specifically, one of the first auxiliary positioning part 15 and the second auxiliary positioning part 22 is a protrusion, and the other of the first auxiliary positioning part 15 and the second auxiliary positioning part 22 is located in a recess that mates with the protrusion. The recess can be in the form of a groove or a through hole, etc., and is not limited here.

[0079] More specifically, the second auxiliary positioning part 22 is a U-shaped rib that protrudes outward from the surface of the side plate 13 of the volute 20 along the second direction, and the first auxiliary positioning part 15 is a positioning rib that protrudes from the side plate 13 along the third direction. When the volute 20 is installed at the opening 12, the positioning rib is inserted into the U-shaped rib from the opening of the U-shaped rib along the third direction to cooperate with it.

[0080] In some embodiments, the volute tongue 10 is further provided with a first connecting portion 16, and the volute shell 20 is provided with a second connecting portion 23 (e.g., ...). Figure 7 As shown, the first connecting part 16 and the second connecting part 23 cooperate to connect the volute 20 and the volute tongue 10. The cooperation of the first connecting part 16 and the second connecting part 23 can keep the volute 20 in a fixed position at the volute tongue 10, thereby maintaining the cooperation relationship between the volute tongue 10 and the volute 20 and ensuring that the deformation suppression of the volute tongue 10 and the volute 20 is continuously effective.

[0081] Furthermore, the first connecting part 16 is located on the side plate 13 opposite to the first air outlet along the second direction.

[0082] Specifically, one of the first connecting part 16 and the second connecting part 23 is a buckle, and the other of the first connecting part 16 and the second connecting part 23 is a slot that cooperates with the buckle.

[0083] More specifically, the first connecting portion 16 includes a plurality of first connecting portions 16, which are spaced apart along a first direction. In order to avoid positional conflict with the first positioning portion 14 located on the same side, the plurality of first connecting portions 16 may be provided to be staggered from the first positioning portion 14 along the first direction.

[0084] In some embodiments, the first positioning portion 14 includes a first sub-positioning portion 141, which is located on the side plate 13 along the second direction. Specifically, the first sub-positioning portion 141 is located on the side plate 13 opposite to the first air outlet along the second direction. Thus, after the second positioning portion 21 of the volute 20 cooperates with the first sub-positioning portion 141 of the side plate 13 along the second direction, the deformation of the volute 20 within the opening 12 can be more effectively suppressed, resulting in a better deformation suppression effect.

[0085] In other embodiments, the first positioning part 14 includes a second sub-positioning part 142 located on the side plate 13 along the first direction. In a preferred embodiment, two second sub-positioning parts 142 are included, located on two opposite side plates 13 along the first direction. This allows both sides of the volute 20 along the first direction to be constrained by the volute tongue 10, resulting in more reliable positioning of the volute 20.

[0086] In other embodiments, the first positioning part 14 includes a first sub-positioning part 141 and a second sub-positioning part 142. The first sub-positioning part 141 is located on the side plate 13 opposite to the first air outlet along the second direction, and the second sub-positioning part 142 is located on the side plate 13 along the first direction. Further, the first sub-positioning part 141 and the second sub-positioning part 142 are spaced apart along a third direction. This allows for multiple volute housings 20 positioned along a third direction at their second-direction locations, making the positioning of the volute housing 20 more reliable.

[0087] In some embodiments, one of the first positioning part 14 and the second positioning part 21 includes a positioning groove, and the other of the first positioning part 14 and the second positioning part 21 includes a positioning protrusion adapted to the positioning groove. The positioning groove and the positioning protrusion have a simple fit and a simple structure.

[0088] Please see Figure 1 and Figure 2 Furthermore, the positioning groove extends continuously along the first direction. In this way, the mating area between the volute tongue 10 and the volute shell 20 in the second direction through the first positioning part 14 and the second positioning part 21 is larger, and the ability of the two to suppress deformation is better.

[0089] In other embodiments, the positioning groove includes multiple sub-positioning grooves, which are spaced apart along the first direction. This allows for more mating points between the volute 20 and the volute tongue 10 in the second direction via the first positioning part 14 and the second positioning part 21, effectively suppressing overall deformation of the volute 20 and the volute tongue 10 in the second direction. Furthermore, compared to a full-surface mating along the first direction, this reduces the assembly difficulty between the volute 20 and the volute tongue 10.

[0090] In other embodiments, the positioning groove includes a first sidewall 1411 and a second sidewall 1412 disposed opposite to each other. The first sidewall 1411 includes a plurality of first sub-sidewalls, which are spaced apart along a first direction. The second sidewall 1412 extends continuously along the first direction. This allows for a larger mating area between the first positioning part 14 and the second positioning part 21 in the second direction, while also reducing the assembly difficulty between the volute 20 and the volute tongue 10.

[0091] Please see Figure 2 and Figure 3In one specific embodiment, the second sub-positioning part 142 includes a positioning groove that communicates with the opening 12, and the second positioning part 21 includes a positioning protrusion that protrudes from both end faces of the volute 20 along a first direction. Two first abutting parts 13 are disposed on the side of the mounting opening 12 that connects with the opening 121.

[0092] Furthermore, in order to facilitate the smooth cooperation between the positioning groove of the second sub-positioning part 142 and the positioning protrusion of the second positioning part 21, the positioning protrusion is provided to include a first positioning protrusion extending along a first direction and a second positioning protrusion extending along a second direction, with the first positioning protrusion and the second positioning protrusion arranged in a cross shape.

[0093] like Figure 9 As shown, based on the same concept in the application, this application also provides a wind turbine assembly 200, including a front shell assembly 210, a rear shell assembly 220 and the aforementioned air duct assembly 100, wherein the front shell assembly 210 and the rear shell assembly 220 can be spliced ​​together to form a receiving space for receiving the air duct assembly 100.

[0094] It should be noted that the volute tongue 10 is provided with a first air inlet and a first air outlet, which are arranged opposite to each other. The front shell assembly 210 and the rear shell assembly 220 are respectively provided with a second air outlet and a second air inlet corresponding to the first air outlet and the first air inlet. The front shell assembly 210 and the rear shell assembly 220 are well known to those skilled in the art and will not be described in detail here.

[0095] like Figure 8 As shown, in some embodiments, the volute tongue 10 is provided with a third positioning part 17, and the front shell assembly 210 is provided with a fourth positioning part 211 (e.g., Figure 10 As shown, the third positioning part 17 cooperates with the fourth positioning part 211 to position the volute tongue 10 relative to the front housing assembly 210. Specifically, there are two third positioning parts 17, which are disposed at both ends of the volute tongue 10 along a first direction. In some embodiments, one of the third positioning part 17 and the fourth positioning part 211 is a protrusion, and the other is a recess. Specifically, the third positioning part 17 is a positioning hole, and the fourth positioning part 211 is a positioning post.

[0096] Please refer to it again. Figure 8 In some embodiments, the impeller assembly 200 includes connectors 230, through which the volute tongue 10 is connected to the front housing assembly 210. Specifically, four connectors 230 are included, each connected to the front housing assembly 210 at one of the four corners of the volute tongue 10. Alternatively, the four connectors 230 can be understood as being connected to the front housing assembly 210 at both ends of the volute tongue 10 along any two of the first, second, and third directions.

[0097] In some embodiments, the volute tongue 10 is provided with two first limiting portions 18, which are disposed on the side of the volute tongue 10 facing the rear housing assembly 220 and respectively disposed at both ends of the volute tongue 10 along a first direction. The rear housing assembly 220 is provided with two first mating portions 221 (e.g., Figure 11 As shown, the two first mating portions 221 respectively mate with the two first limiting portions 18 to limit the volute tongue 10 along the first direction within the rear housing assembly 220. By providing two first limiting portions 18 arranged along the first direction to mate with the two first mating portions 221, deformation of the volute tongue 10 along the first direction can be further suppressed after the air duct assembly 100 is assembled. Specifically, one of the first limiting portions 18 and the first mating portions 221 is an annular groove, and the other of the first limiting portions 18 and the first mating portions 221 is a rib that mates with the annular groove.

[0098] Please refer to it again. Figure 3 In some embodiments, the volute 20 is provided with a second limiting portion 24, which is disposed on the side of the volute 20 facing the rear shell assembly 220 and disposed in the middle of the volute 20 along the first direction. The rear shell assembly 220 is provided with a second mating portion 222 (e.g., Figure 11 As shown, the second mating part 222 engages with the second limiting part 24 to provide a preload force that moves the volute 20 from the mounting port 12 toward the receiving cavity 11. This further suppresses deformation of the volute 20 into the receiving cavity 11 after the air duct assembly 100 is assembled. Specifically, one of the second limiting part 24 and the second mating part 222 is a groove, and the other is a rib that engages with the groove.

[0099] Furthermore, the second positioning part 21 and the second limiting part 24 are spaced apart along a third direction. Thus, by the cooperation of the second positioning part 21 with the first positioning part 14, and the cooperation of the second limiting part 24 with the second mating part 222, the volute 20 can be subjected to uniform force, resulting in good overall deformation suppression. Furthermore, due to the opening 121, the connection between the opening 121 and the first air outlet of the volute 20 cannot bear force; therefore, this arrangement makes it less likely for the volute 20 to collapse into the receiving cavity 11. Specifically, the second positioning part 21 and the second limiting part 24 are respectively located on both sides of the volute 20 along a third direction.

[0100] Please refer to it again. Figure 2 In some embodiments, the volute tongue 10 is provided with two third limiting portions 19, which are disposed on the side of the volute tongue 10 facing the front housing assembly 210 and disposed on both sides of the volute tongue 10 along the second direction. The front housing assembly 210 is provided with two third mating portions 214 (e.g., Figure 10As shown, the two third mating portions 214 respectively cooperate with the two third limiting portions 19 to limit the volute tongue 10 along the second direction to the front shell assembly 210. By providing two third limiting portions 101 arranged along the second direction to cooperate with the two third mating portions 214, the deformation of the volute tongue 10 along the second direction can be further suppressed after the air duct assembly 100 is assembled. Specifically, one of the third limiting portions 101 and the third mating portions 214 is a groove, and the other of the third limiting portions 101 and the third mating portions 214 is a buckle. Alternatively, in other embodiments, one of the third limiting portions 101 and the third mating portions 214 is a groove, and the other of the third limiting portions 101 and the third mating portions 214 is a rib.

[0101] like Figure 12 As shown, in some embodiments, the rear shell assembly 220 is further provided with an anti-detachment part 223, which abuts against the volute 20 in a third direction to prevent the volute 20 from detaching from the volute tongue 10 at the opening 12.

[0102] Please refer to it again. Figure 9 In some embodiments, the impeller assembly 200 further includes a heating element assembly 240, which is installed within the receiving space and fixed to the front housing assembly 210. Specifically, the heating element assembly 240 is disposed between the first air outlet 18 and the second air outlet 211.

[0103] Please refer to it again. Figure 12 In some embodiments, the volute 20 abuts against the heating element assembly 240 along a third direction. Thus, the volute 20 can be pressed onto the heating element assembly 240 along a third direction, which serves two purposes: firstly, to fix the heating element assembly 240, and secondly, to suppress deformation of the volute 20.

[0104] Based on the same concept in the application, this application also provides an electric heater, which includes the aforementioned impeller assembly 200. The structure of the electric heater is well known to those skilled in the art and will not be described in detail here.

[0105] The air duct assembly 100, the impeller assembly 200, and the electric heater provided in the embodiments of this application have the following beneficial effects:

[0106] After the volute tongue 10 and volute housing 20 are injection molded, the materials used are easily deformable, causing the volute tongue 10 and volute housing 20 to be prone to deformation, especially at the opening 12, which can easily lead to the collapse of the volute tongue 10. By having two side plates 13 that are opposite to each other along the first direction abut against the volute housing 20, the volute tongue 20 can be supported at the opening 12, thereby suppressing the deformation of the volute tongue 10 along the first direction at the opening 12. Furthermore, by providing a first positioning part 14 on the side plate 13 of the volute tongue 10 and a second positioning part 21 that is adapted to the first positioning part 14 on the volute housing 20, the volute housing 20 can reliably support the opening 12 along the first direction while also suppressing the deformation of the volute housing 20 along the second direction at the opening 12, and can also counteract and suppress the deformation of the volute tongue 10 along the second direction at the opening 12. Therefore, through the cooperation between the volute tongue 10 and the volute shell 20, the deformation caused by the accommodating cavity 11 and the opening 12 in the material and structure of the volute tongue 10 can be suppressed, and at the same time, the deformation caused by the material and structure of the volute shell 20 can also be suppressed. Therefore, the air duct assembly 100 in this application has small overall structural deformation, thus generating less noise and improving the user experience.

[0107] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0108] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A duct assembly (100), characterized in that, include: A volute tongue (10) having an internal cavity (11), wherein the volute tongue (10) has an opening (12) communicating with the cavity (11); and The volute (20) is installed at the opening (12) to define the first air outlet for airflow at the volute tongue (10); The volute tongue (10) includes a plurality of side plates (13), and two of the side plates (13) that are opposite each other along the first direction abut against the volute shell (20) so that the volute shell (20) supports the volute tongue (10) along the first direction. The volute tongue (10) has a first positioning part (14) on its side plate (13) and the volute shell (20) has a second positioning part (21) that is adapted to the first positioning part (14) so ​​that the volute tongue (10) positions the volute shell (20) in the second direction. The volute tongue (10) is further provided with a first connecting part (16), and the volute shell (20) is provided with a second connecting part (23). The first connecting part (16) and the second connecting part (23) cooperate to connect the volute shell (20) with the volute tongue (10); and the first connecting part (16) is located on the side plate (13) opposite to the first air outlet along the second direction; The volute tongue (10) has a first auxiliary positioning part (15) on its side plate and the volute shell (20) has a second auxiliary positioning part (22). The first auxiliary positioning part (15) and the second auxiliary positioning part (22) cooperate to position the volute shell (20) relative to the volute tongue (10) along the first direction and the second direction. The materials of the volute tongue (10) and the volute shell (20) are PP-GF materials. The center of the second auxiliary positioning part (22) coincides with the center line of the volute (20) in a third direction parallel to the third direction; wherein the first direction, the second direction and the third direction are perpendicular to each other.

2. The air duct assembly (100) according to claim 1, characterized in that, The first positioning part (14) includes a first sub-positioning part (141), which is located on the side plate (13) along the second direction; and / or The first positioning part (14) includes a second sub-positioning part (142), which is located on the side plate (13) along the first direction.

3. The air duct assembly (100) according to claim 2, characterized in that, When the first positioning part (14) includes the second sub-positioning part (142), the second sub-positioning part (142) includes at least two, and the at least two second sub-positioning parts (142) are located on two opposite side plates (13) along the first direction.

4. The air duct assembly (100) according to claim 1, characterized in that, When the first positioning part (14) includes a first sub-positioning part (141) and a second sub-positioning part (142), the first sub-positioning part (141) and the second sub-positioning part (142) are spaced apart along the third direction.

5. The air duct assembly (100) according to claim 1, characterized in that, One of the first positioning part (14) and the second positioning part (21) includes a positioning groove, and the other of the first positioning part (14) and the second positioning part (21) includes a positioning protrusion adapted to the positioning groove.

6. The air duct assembly (100) according to claim 5, characterized in that, The positioning groove extends continuously along the first direction.

7. The air duct assembly (100) according to claim 5, characterized in that, The positioning groove includes multiple sub-positioning grooves, which are spaced apart along the first direction.

8. The air duct assembly (100) according to claim 5, characterized in that, The positioning groove includes a first sidewall (1411) and a second sidewall (1412) disposed opposite to each other. The first sidewall (1411) includes a plurality of first sub-sidewalls, which are spaced apart along the first direction. The second sidewall (1412) extends continuously along the first direction.

9. The air duct assembly (100) according to claim 5, characterized in that, The positioning protrusion extends continuously along the first direction.

10. The air duct assembly (100) according to claim 1, characterized in that, The air duct assembly (100) further includes a wind turbine (30) and a drive member (40). The wind turbine (30) is installed in the receiving cavity (11) of the volute tongue (10) along the first direction. The drive member (40) is installed at one end of the volute tongue (10) along the first direction. The drive member (40) is used to drive the wind turbine (30) to rotate. The side plate (13) of the volute tongue (10) is provided with a limiting rib (131), the limiting rib (131) protrudes along the first direction on the end face of the side plate (13) of the volute tongue (10), and the limiting rib (131) is arranged around the driving member (40).

11. A wind turbine assembly (200), characterized in that, It includes a front shell assembly (210), a rear shell assembly (220), and a duct assembly (100) as described in any one of claims 1 to 10, wherein the front shell assembly (210) and the rear shell assembly (220) can be joined together to form a receiving space for receiving the duct assembly.

12. The wind turbine assembly (200) according to claim 11, characterized in that, The volute tongue (10) is provided with at least two first limiting portions (18), which are disposed on the side of the volute tongue (10) facing the rear shell assembly (220), and the at least two first limiting portions (18) are respectively disposed at both ends of the volute tongue (10) along the first direction; The rear shell assembly (220) is provided with at least two first mating parts (221), which respectively mate with the at least two first limiting parts (18) so that the volute tongue (10) is limited to the rear shell assembly (220) along the first direction.

13. The wind turbine assembly (200) according to claim 11, characterized in that, The volute (20) is provided with a second limiting part (24), which is located on the side of the volute (20) facing the rear shell assembly (220) and is located in the middle of the volute (20) along the first direction; The rear housing assembly (220) is provided with a second mating part (222), which cooperates with the second limiting part (24) to provide a preload force for moving the volute (20) away from the opening (12) toward the receiving cavity (11).

14. The wind turbine assembly (200) according to claim 13, characterized in that, The second positioning part (21) and the second limiting part (24) of the volute (20) are spaced apart along the third direction.

15. The wind turbine assembly (200) according to claim 11, characterized in that, The volute tongue (10) is provided with at least two third limiting portions (19), which are located on the side of the volute tongue (10) facing the front shell assembly (210) and are located on both sides of the volute tongue (10) along the second direction. The front shell assembly (210) is provided with at least two third mating parts (214), which respectively mate with the at least two third limiting parts (19) so that the volute tongue (10) is limited in the second direction to the front shell assembly (210).

16. The wind turbine assembly (200) according to claim 11, characterized in that, The volute tongue (10) is provided with a third positioning part (17), and the front shell assembly (210) is provided with a fourth positioning part (211). The third positioning part (17) and the fourth positioning part (211) cooperate to position the volute tongue (10) relative to the front shell assembly (210).

17. The wind turbine assembly (200) according to claim 11, characterized in that, The rear shell assembly (220) is also provided with an anti-detachment part (223), which abuts against the volute (20) along the third direction to prevent the volute (20) from detaching from the volute tongue (10) from the opening (12).

18. The wind turbine assembly (200) according to claim 11, characterized in that, The wind turbine assembly (200) also includes a heating element assembly (240), which is installed in the receiving space and fixed to the front shell assembly (210).

19. The wind turbine assembly (200) according to claim 18, characterized in that, The volute tongue (10) abuts against the heating element assembly (240) along the third direction.

20. An electric heater, characterized in that, Includes the wind turbine assembly (200) as described in any one of claims 11 to 19.

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