Air duct components, home appliances and molds

Abstract

This invention provides an air duct assembly, a household appliance, and a mold. The air duct assembly is a paint-free injection molded part. The air duct assembly includes: an outer surface part, at least a portion of which is an outer surface; an air duct part for air delivery, disposed within the outer surface part, and including an air duct wall; and a support part disposed between the outer surface part and the air duct wall, the air duct wall being connected to the outer surface part via the support part. The support part has a gate forming area corresponding to the gate of the mold. The air duct assembly of this invention solves the problem of appearance defects easily occurring in air duct assemblies manufactured using paint-free technology in the prior art.

Description

Technical Field

[0001] This invention relates to the field of household appliance technology, and more specifically, to a duct assembly, a household appliance, and a mold. Background Technology

[0002] With the increasing variety of home appliances and the improvement of consumers' aesthetic tastes, the exquisite appearance of home appliances has become an important demand. How to make the appearance of appliances more upscale and textured is the focus of this application technology. At present, the surface treatment process of home appliances is mainly spraying, which is a mature and widely used process. However, the spraying process has obvious disadvantages: it is expensive, cannot be recycled, and has a high scrap rate; moreover, ordinary spraying materials contain VOCs, benzene compounds, heavy metals and other substances, which expose workers to toxic environments and cause serious environmental pollution; at the same time, the low degree of design freedom restricts the innovation of appearance solutions.

[0003] Faced with the global energy crisis, ecological degradation, and the impact of green trade barriers, green home appliances have become a new hot spot in market competition, and "greening trade" has become an inevitable trend. Paint-free technology has emerged to meet this need. This injection molding technology offers advantages such as high design freedom, low cost, environmental friendliness, and recyclability. By adding metallic powders or pearlescent powders to the material, the surface of the molded parts has unique light and shadow effects and a metallic luster, allowing the parts to achieve an appearance comparable to paint without secondary processing. It surpasses traditional paint or electroplating processes in terms of economy, environmental protection, and even aesthetics.

[0004] However, glitter-based paint-free materials are prone to appearance defects such as flow marks, weld lines, fusion lines, and gate marks during injection molding, resulting in poor consistency. This is mainly related to factors such as the paint-free material itself, structural design, Moldflow simulation scheme, mold design scheme, and molding process conditions. Furthermore, the air duct assembly, with its external appearance surface, complex internal air duct structure, motor mounting structure, and complex internal ribs, will affect the flow and filling of the melt on the appearance surface, generating numerous flow mark defects. Summary of the Invention

[0005] The main objective of this invention is to provide a duct assembly, a household appliance, and a mold to solve the problem that duct assemblies made using paint-free technology in the prior art are prone to appearance defects.

[0006] To achieve the above objectives, according to a first aspect of the present invention, an air duct assembly is provided. The air duct assembly is a paint-free injection molded part. The air duct assembly includes: an outer surface portion, at least a portion of which is an outer surface; an air duct portion for supplying air, the air duct portion being disposed within the outer surface portion and including an air duct wall; and a support portion disposed between the outer surface portion and the air duct wall, the air duct wall being connected to the outer surface portion via the support portion; wherein the support portion has a gate forming area corresponding to the gate of the mold.

[0007] Furthermore, the exterior portion has a third recess and a fourth recess; the air duct assembly further includes: a first support ear connected to the exterior portion, at least a portion of the first support ear being located within the third recess; a second support ear connected to the exterior portion, at least a portion of the second support ear being located within the fourth recess; wherein the first support ear and the second support ear are sequentially arranged along a predetermined axis; the support portion has at least two gate forming areas, the at least two gate forming areas including a first gate forming area and a second gate forming area, the first gate forming area and the second gate forming area being symmetrically arranged relative to the predetermined axis.

[0008] Furthermore, both the exterior and support sections are symmetrically arranged relative to a predetermined axis.

[0009] Furthermore, the first support ear, the first gate forming area, the second support ear, and the second gate forming area are evenly arranged along the circumference of the air duct assembly.

[0010] Furthermore, the support includes a connecting part located between the gate forming area and the appearance part, the connecting part being connected to the inner wall of the appearance part, and the connecting part being inclined relative to the inner wall of the appearance part.

[0011] Furthermore, a first recess is provided on the support portion, and the first recess is recessed along the thickness direction of the support portion; a first recess is provided on the first side and / or the second side of the gate forming area; wherein, the first side and the second side of the gate forming area are arranged sequentially along the direction perpendicular to the gate forming area to the appearance portion.

[0012] Furthermore, the exterior part has a first end and a second end that are disposed opposite to each other along the axial direction of the air duct assembly; the exterior part is provided with a mounting hole, and a second recess is provided on the side of the mounting hole near the first end of the exterior part, and the second recess is recessed along the thickness direction of the exterior part.

[0013] Further, the minimum width of the second recess is a, the diameter of the mounting hole is Φ, and a ≥ 0.5Φ; and / or, the mounting hole has a first end and a second end disposed opposite to each other along the axial direction of the air duct assembly, the second end of the mounting hole is located on the side of the first end of the mounting hole away from the first end of the appearance part, and the second recess is located between the first end of the appearance part and the second end of the mounting hole; and / or, the maximum distance between the second recess and the first end of the appearance part is b, and b ≤ 2mm; and / or, the average thickness of the appearance part disposed opposite to the bottom of the second recess is less than or equal to 0.6 times the average thickness of the appearance part.

[0014] Furthermore, the outer surface is a ring structure, the ring structure is cylindrical, and the outer wall of the ring structure is the outer surface; and / or, the air duct assembly also includes multiple connecting ribs, each connecting rib is a strip structure, the first end of each connecting rib is connected to the outer surface, and the second end of each connecting rib is connected to the air duct wall.

[0015] According to a second aspect of the present invention, a household appliance is provided, including the air duct assembly of the above embodiments.

[0016] According to a third aspect of the invention, a mold is provided having a cavity for forming the aforementioned air duct assembly, and the mold further having a gate communicating with the cavity.

[0017] By applying the technical solution of this invention, the air duct assembly is manufactured using a paint-free technology. The air duct assembly is an injection-molded product made of paint-free material. The air duct assembly includes an outer surface, an air duct section, and a support section. At least a portion of the outer surface is the outer surface, and the support section is used to connect the outer surface and the air duct wall of the air duct section. When the injection molding process begins, the gate opens, and the molten plastic flows from the gate into the mold cavity to fill and form the air duct assembly. By setting the gate forming area on the support section, gate marks can be avoided on the outer surface, and the filling sequence of the air duct assembly can be controlled to ensure that the outer surface is filled first, avoiding the impact of the molten plastic on the outer surface caused by subsequent filling, which would cause flow marks on the outer surface. This solves the problem that air duct assemblies manufactured using paint-free technology in the prior art are prone to appearance defects. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0019] Figure 1 A front view of an embodiment of the air duct assembly according to the present invention is shown;

[0020] Figure 2 It shows Figure 1 Sectional view at section AA;

[0021] Figure 3 A rear view of an embodiment of the air duct assembly according to the present invention is shown;

[0022] Figure 4 An isometric view of an embodiment of the air duct assembly according to the present invention is shown;

[0023] Figure 5 A left view of an embodiment of the air duct assembly according to the present invention is shown;

[0024] Figure 6A right view of an embodiment of the air duct assembly according to the present invention is shown;

[0025] Figure 7 It shows Figure 1 Sectional view at section BB;

[0026] Figure 8 A schematic diagram of the mounting holes for the air duct assembly according to the present invention is shown;

[0027] Figure 9 It shows Figure 8 A magnified view of a section at point D.

[0028] The above figures include the following reference numerals:

[0029] 10. Exterior part; 11. Third recess; 12. Fourth recess; 13. Mounting hole; 20. Air duct; 21. Air duct wall; 30. Support part; 32. Sprue forming area; 33. Connecting part; 34. First recess; 35. Second recess; 40. First support ear; 50. Second support ear; 60. Predetermined axis; 70. Connecting rib. Detailed Implementation

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, 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 application pertains.

[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0033] This invention provides an air duct assembly; please refer to [reference needed]. Figures 1 to 9The air duct assembly is a paint-free injection molded part, and the air duct assembly includes: an appearance part 10, at least a portion of the surface of the appearance part 10 being an appearance surface; an air duct part 20 for air supply, the air duct part 20 being disposed within the appearance part 10, the air duct part 20 including an air duct wall 21; and a support part 30 disposed between the appearance part 10 and the air duct wall 21, the air duct wall 21 being connected to the appearance part 10 through the support part 30; wherein, the support part 30 has a gate forming area 32 corresponding to the gate of the mold.

[0034] The air duct assembly of the present invention is made using a paint-free technology. The air duct assembly is an injection-molded product made of paint-free material. The air duct assembly includes an outer surface 10, an air duct 20, and a support 30. At least a portion of the surface of the outer surface 10 is the outer surface. The support 30 is used to connect the outer surface 10 and the air duct wall 21 of the air duct 20. When the injection molding process begins, the gate opens, and the molten plastic flows from the gate into the mold cavity to fill and form the air duct assembly. By setting the gate forming area 32 on the support 30, gate marks can be avoided on the outer surface 10, and the filling sequence of the air duct assembly can be controlled to ensure that the outer surface is filled first, avoiding the impact of the molten plastic on the outer surface caused by the subsequent filling of the outer surface, which would cause flow marks on the outer surface. This solves the problem that air duct assemblies made using paint-free technology in the prior art are prone to appearance defects.

[0035] It should be noted that when using a mold to injection mold panel components, the mold cavity is used to form the air duct assembly, and the material in the gate will form the gate forming part. The area where the support part 30 is connected to the gate forming part is the gate forming area 32.

[0036] It should be noted that when air duct components are applied to home appliances, the visible surface is part of the appearance of the home appliance, that is, the visible surface is the surface exposed to the application environment and can be seen by the user; the non-visual surface is located inside the home appliance, that is, the non-visual surface is the surface hidden inside the home appliance and cannot be seen by the user.

[0037] In this embodiment, the outer appearance part 10 has a third recess 11 and a fourth recess 12; the air duct assembly further includes: a first support ear 40 connected to the outer appearance part 10, at least a portion of the first support ear 40 being located within the third recess 11; a second support ear 50 connected to the outer appearance part 10, at least a portion of the second support ear 50 being located within the fourth recess 12; wherein the first support ear 40 and the second support ear 50 are sequentially arranged along a predetermined axis 60; the support part 30 has at least two gate forming areas 32, the at least two gate forming areas 32 including a first gate forming area and a second gate forming area, and are symmetrically arranged relative to the predetermined axis 60.

[0038] Specifically, the first support ear 40 and the second support ear 50 are used to install the connecting structure so that the air duct assembly can be connected to other components of the household appliance. During injection molding, the first gate forming area and the second gate forming area are filled with plastic at the same time. The first gate forming area and the second gate forming area are symmetrically arranged relative to the predetermined axis 60, so that the plastic melt at the first gate forming area and the second gate forming area can reach the first support ear 40 or the second support ear 50 at the same time, so as to ensure that the weld line appears near the first support ear 40 and the second support ear 50, thereby avoiding the formation of weld lines on the appearance surface of the appearance part.

[0039] Optionally, there may be two gate forming zones 32.

[0040] Specifically, one end of the first support ear 40 is located in the third recess 11, and the other end of the first support ear 40 is located between the outer appearance part 10 and the air duct wall 21; one end of the second support ear 50 is located in the fourth recess 12, and the other end of the second support ear 50 is located between the outer appearance part 10 and the air duct wall 21.

[0041] In this embodiment, both the appearance part 10 and the support part 30 are symmetrically arranged relative to the predetermined axis 60. This arrangement further ensures that the melt at the first gate forming area and the second gate forming area can simultaneously reach the first support ear 40 or the second support ear 50. The weld line appears near the first support ear 40 and the second support ear 50, ensuring balanced glue injection and uniform molding of the air duct assembly.

[0042] In this embodiment, the first support ear 40, the first gate forming area, the second support ear 50, and the second gate forming area are evenly arranged along the circumference of the air duct assembly.

[0043] In specific implementation, any two of the first support ear 40, the first gate forming area, the second support ear 50, and the second gate forming area are arranged at a 90-degree angle. That is, the two gate forming areas and the two support ears are respectively set at the four directions of 3, 6, 9, and 12 o'clock, and the molten metal from the gate simultaneously reaches the first support ear 40 and the second support ear 50.

[0044] Specifically, both the first support ear 40 and the second support ear 50 are centrally symmetrical structures. The center lines of the first support ear 40 and the second support ear 50 coincide with the predetermined axis 60. This arrangement allows the first support ear 40 and the second support ear 50 to be located on the horizontal sides of the outer appearance part 10, so that the air duct assembly is suspended and can rotate around the predetermined axis 60. This further ensures that the melt at the first gate forming area and the second gate forming area can simultaneously reach the first support ear 40 or the second support ear 50. The weld line appears near the first support ear 40 and the second support ear 50, while ensuring the reliability of the connection between the air duct assembly and other components of the household appliance.

[0045] In this embodiment, the support portion 30 includes a connecting portion 33, which is located between the gate forming area 32 and the appearance portion 10. The connecting portion 33 is connected to the inner wall of the appearance portion 10, and the connecting portion 33 is inclined relative to the inner wall of the appearance portion 10. This arrangement makes the connecting portion 33 connected to the appearance portion 10 at an angle, so as to avoid the plastic melt from the connecting portion 33 directly impacting the appearance portion 10, thereby reducing the gate marks on the appearance portion 10.

[0046] In this embodiment, a first recess 34 is provided on the support portion 30, and the first recess 34 is recessed along the thickness direction of the support portion 30; the first side and / or the second side of the gate forming area 32 are provided with the first recess 34; wherein, the first side and the second side of the gate forming area 32 are sequentially arranged along a direction perpendicular to the gate forming area 32 to the appearance portion 10. It should be noted that the thickness direction of the support portion 30 is... Figure 2 The vertical direction is parallel to the axial direction of the cylindrical exterior.

[0047] Specifically, the first recess 34 can obstruct the flow of melt through it, so that the flow rate of the plastic melt at the support 30 is slower than that at the appearance 10, so that the appearance 10 is preferentially filled. That is, the plastic melt forming the appearance 10 comes from or flows through the appearance 10, rather than from or flows through the support 30, thus avoiding the plastic melt from flowing through the support 30 first and then spraying and impacting the appearance 10, which would cause flow marks on the appearance 10.

[0048] In this embodiment, the exterior part 10 has a first end and a second end that are disposed opposite to each other along the axial direction of the air duct assembly; the exterior part 10 is provided with a mounting hole 13, and a second recess 35 is provided on the side of the mounting hole 13 near the first end of the exterior part 10, and the second recess 35 is recessed along the thickness direction of the exterior part 10.

[0049] It should be noted that the thickness direction of the exterior part 10 is the same as the thickness direction of the sidewall of the exterior part 10, specifically... Figure 1The radial direction of the exterior part 10.

[0050] Specifically, mounting hole 13 is used to install a mesh cover for the air duct assembly. The second recess 35 can obstruct the flow of molten material through this recess, making the molten material flow rate at mounting hole 13 slower than in other thicker areas, thus allowing the other thicker areas to be filled preferentially and reducing the extension distance of the weld line after the hole.

[0051] Specifically, mounting hole 13 is a screw hole.

[0052] In this embodiment, as Figure 8 As shown, the minimum width of the second recess 35 is a, the diameter of the mounting hole 13 is Φ, and a ≥ 0.5Φ; and / or, the mounting hole 13 has a first end and a second end disposed opposite to each other along the axial direction of the air duct assembly, the second end of the mounting hole 13 is located on the side of the first end of the mounting hole 13 away from the first end of the appearance part 10, and the second recess 35 is located between the first end of the appearance part 10 and the second end of the mounting hole 13; and / or, the maximum distance between the second recess 35 and the first end of the appearance part 10 is b, and b ≤ 2mm; and / or, the average thickness of the appearance part 10 disposed opposite to the bottom of the second recess 35 is less than or equal to 0.6 times the average thickness of the appearance part 10.

[0053] Specifically, the bottom of the portion of the outer appearance 10 is opposite to that of the second recess 35. The average thickness of this portion of the outer appearance 10 is 0.6 times the average thickness of the other portions of the outer appearance 10, thereby further ensuring that the melt flow rate of this portion of the outer appearance 10 is slower than that of the other portions of the outer appearance 10, and further ensuring that the area where the other portions of the outer appearance 10 are located is preferentially filled, thereby reducing the extension distance of the weld line after the hole.

[0054] Specifically, the minimum width of the second recess 35 is a, and the diameter of the mounting hole 13 is Φ, where a ≥ 0.5Φ. This setting ensures that the second recess 35 will not be unable to change the thickness of the entire mounting hole 13 due to its small width, thus failing to affect the melt flow rate at the mounting hole 13 or having an insignificant effect. The maximum distance between the second recess 35 and the first end of the appearance part 10 is b, where b ≤ 2mm. This setting ensures that the second recess 35 will not be unable to change the thickness of the appearance part 10 at this location due to its large distance from the first end of the appearance part 10, thus failing to affect the melt flow rate of the appearance part 10 at this location or having an insignificant effect.

[0055] In this embodiment, the outer appearance part 10 is a ring structure, the ring structure is cylindrical, and the outer side wall of the ring structure is the outer appearance surface; and / or, the air duct assembly also includes a plurality of connecting ribs 70, each connecting rib 70 is a strip structure, the first end of each connecting rib 70 is connected to the outer appearance part 10, and the second end of each connecting rib 70 is connected to the air duct wall 21.

[0056] Specifically, such as Figure 4 As shown, the outer appearance part 10 has a ring structure, which is cylindrical. The strip-shaped connecting ribs 70 solve the problem of flow marks caused by setting T-shaped ribs, and the multiple connecting ribs 70 increase the connection reliability between the outer appearance part 10 and the air duct wall 21, and increase the connection reliability between the outer appearance part 10 and the air duct part 20.

[0057] The present invention also provides a household appliance, including the air duct assembly in the above embodiments.

[0058] The household appliance of the present invention includes the air duct assembly in the above embodiments. The air duct assembly is made using a paint-free technology. The air duct assembly is an injection-molded product and is made of paint-free material. The air duct assembly includes an outer surface 10, an air duct 20, and a support 30. At least a portion of the surface of the outer surface 10 is the outer surface. The support 30 is used to connect the outer surface 10 and the air duct wall 21 of the air duct 20. When the injection molding process begins, the gate is opened, and the molten plastic flows from the gate into the cavity of the mold to fill and form the air duct assembly. By setting the gate forming area 32 on the support 30, gate marks can be avoided on the outer surface 10, and the filling sequence of the air duct assembly can be controlled to ensure that the outer surface is filled first, avoiding the impact of the molten plastic on the outer surface caused by the subsequent filling of the outer surface, which would cause flow marks on the outer surface. This solves the problem that air duct assemblies made using paint-free technology in the prior art are prone to appearance defects.

[0059] The present invention also provides a mold having a cavity for forming the air duct assembly in the above embodiments, and the mold further having a gate connected to the cavity.

[0060] The mold of the present invention has a cavity for forming the air duct assembly in the above embodiments. When the injection molding process begins, the gate is opened, and the molten plastic flows from the gate into the cavity to form the air duct assembly. The air duct assembly is made using a paint-free technology. The air duct assembly is an injection-molded product and is made of paint-free material. The air duct assembly includes an outer surface 10, an air duct 20, and a support 30. At least a portion of the surface of the outer surface 10 is the outer surface. The support 30 is used to connect the outer surface 10 and the air duct wall 21 of the air duct 20. When the injection molding process begins, the gate is opened, and the molten plastic flows from the gate into the cavity of the mold to fill and form the air duct assembly. By setting the gate forming area 32 on the support 30, gate marks can be avoided on the outer surface 10, and the filling sequence of the air duct assembly can be controlled to ensure that the outer surface is filled first, avoiding the impact of the molten plastic on the outer surface caused by the subsequent filling of the outer surface, which would cause flow marks on the outer surface. This solves the problem that air duct assemblies made using paint-free technology in the prior art are prone to appearance defects.

[0061] Specifically, the mold has two gates, both of which are connected to the cavity.

[0062] In specific implementation, the outer part 10 is cylindrical, and the support part 30 is used to connect the outer part 10 and the air duct wall 21 of the air duct part 20. It has multiple connecting ribs 70. The first support ear 40 and the second support ear 50 are located on the horizontal sides of the outer part 10 and are used to install on the connecting structure so that the part is suspended and rotates around the center line of the first support ear 40 and the center line of the second support ear 50. Two gate forming areas 32 are located on the support part 30 and are approximately symmetrically arranged about a predetermined axis 60. During injection molding, the first gate forming area and the second gate forming area are filled with glue at the same time. The melt at the first gate forming area and the second gate forming area can reach the first support ear 40 or the second support ear 50 at the same time to ensure that the weld line appears at the first support ear 40 and the second support ear 50. Near the second support ear 50; a first recess 34 is provided on the support 30 near the gate forming area 32 to obstruct the melt flowing through this area, ensuring that the outer appearance 10 is filled preferentially, that is, the melt forming the outer appearance 10 comes from or flows through the outer appearance 10, rather than from or flows through the support 30. Otherwise, the melt will flow through the support 30 first and spray, impacting the outer appearance and causing flow marks. A connecting part 33 is provided on the support 30 in the area where the gate forming area 32 connects to the outer appearance 10. The connecting part 33 is connected to the outer appearance 10 at an angle to avoid the melt from the connecting part 33 directly impacting the outer appearance 10, but instead impacting at an angle to reduce the gate marks. The outer appearance 10 is also provided with a mounting hole 13 for mounting the mesh cover with screws. When the mounting hole 13 is located on one side of the gate forming area 32, a second recess 35 is provided on the side of the mounting hole 13 near the first end of the appearance part 10 to hinder the flow of the melt here, so that the melt fills around the thicker area and reduces the extension distance of the weld line after the hole.

[0063] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0064] The air duct assembly of the present invention includes an outer surface portion 10, an air duct portion 20, a support portion 30, a first support ear portion 40, and a second support ear portion 50. The support portion 30 has a gate forming area 32 corresponding to the gate of the mold. A first recess 34 is provided on the first side and / or the second side of the gate forming area 32, so that the outer surface is preferentially filled. The first gate forming area and the second gate forming area are symmetrically arranged with respect to a predetermined axis 60 to ensure that the weld line is located at the first support ear portion 40 and the second support ear portion 50. The outer surface portion 10 is provided with a mounting hole 13. A second recess 35 is provided on the side of the mounting hole 13 near the first end of the outer surface portion 10. The second recess 35 is recessed along the thickness direction of the outer surface portion 10 so that the melt fills around the thicker area, reducing the weld line and extension distance after the hole. The air duct assembly of the present invention can avoid flow mark defects and control the weld line, avoiding flow mark defects caused by the internal structure of the air duct assembly.

[0065] The air duct assembly of the present invention is made using a paint-free technology. The air duct assembly is an injection-molded product made of paint-free material. The air duct assembly includes an outer surface 10, an air duct 20, and a support 30. At least a portion of the surface of the outer surface 10 is the outer surface. The support 30 is used to connect the outer surface 10 and the air duct wall 21 of the air duct 20. When the injection molding process begins, the gate opens, and the molten plastic flows from the gate into the mold cavity to fill and form the air duct assembly. By setting the gate forming area 32 on the support 30, gate marks can be avoided on the outer surface 10, and the filling sequence of the air duct assembly can be controlled to ensure that the outer surface is filled first, avoiding the impact of the molten plastic on the outer surface caused by the subsequent filling of the outer surface, which would cause flow marks on the outer surface. This solves the problem that air duct assemblies made using paint-free technology in the prior art are prone to appearance defects.

[0066] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0067] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0068] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A duct assembly, characterized in that, The air duct assembly is a paint-free injection molded part, and the air duct assembly includes: The exterior part (10) has at least a portion of its surface as an exterior surface; Air duct section (20) for supplying air, the air duct section (20) is disposed inside the exterior section (10), the air duct section (20) includes air duct wall (21); A support part (30) is disposed between the outer appearance part (10) and the air duct wall (21), and the air duct wall (21) is connected to the outer appearance part (10) through the support part (30); The support (30) has a gate forming area (32) corresponding to the gate of the mold.

2. The air duct assembly according to claim 1, characterized in that, The exterior portion (10) has a third recess (11) and a fourth recess (12); the air duct assembly further includes: A first supporting ear (40) is connected to the outer appearance part (10), and at least a portion of the first supporting ear (40) is located within the third recess (11); The second support ear (50) is connected to the outer appearance part (10), and at least a portion of the second support ear (50) is located in the fourth recess (12); The first support ear (40) and the second support ear (50) are arranged sequentially along a predetermined axis (60); the support part (30) has at least two gate forming areas (32), the at least two gate forming areas (32) include a first gate forming area and a second gate forming area, the first gate forming area and the second gate forming area are symmetrically arranged relative to the predetermined axis (60).

3. The air duct assembly according to claim 2, characterized in that, Both the exterior part (10) and the support part (30) are symmetrically arranged relative to the predetermined axis (60).

4. The air duct assembly according to claim 2, characterized in that, The first support ear (40), the first gate forming area, the second support ear (50) and the second gate forming area are evenly arranged along the circumference of the air duct assembly.

5. The air duct assembly according to any one of claims 1 to 4, characterized in that, The support portion (30) includes: A connecting part (33) is located between the gate forming area (32) and the outer appearance part (10). The connecting part (33) is connected to the inner wall of the outer appearance part (10) and is inclined relative to the inner wall of the outer appearance part (10).

6. The air duct assembly according to any one of claims 1 to 4, characterized in that, The support portion (30) is provided with a first recess (34), which is recessed along the thickness direction of the support portion (30); the first recess (34) is provided on the first side and / or the second side of the gate forming area (32); wherein the first side and the second side of the gate forming area (32) are arranged sequentially along a direction perpendicular to the gate forming area (32) to the appearance portion (10).

7. The air duct assembly according to any one of claims 1 to 4, characterized in that, The exterior part (10) has a first end and a second end disposed opposite to each other along the axial direction of the air duct assembly; the exterior part (10) is provided with a mounting hole (13), and a second recess (35) is provided on the side of the mounting hole (13) near the first end of the exterior part (10), and the second recess (35) is recessed along the thickness direction of the exterior part (10).

8. The air duct assembly according to claim 7, characterized in that, The minimum width of the second recess (35) is a, the diameter of the mounting hole (13) is Φ, and a ≥ 0.5Φ; and / or, The mounting hole (13) has a first end and a second end disposed opposite to each other along the axial direction of the air duct assembly. The second end of the mounting hole (13) is located on the side of the first end of the mounting hole (13) away from the first end of the outer appearance part (10). The second recess (35) is located between the first end of the outer appearance part (10) and the second end of the mounting hole (13); and / or, The maximum distance between the second recess (35) and the first end of the outer part (10) is b, where b ≤ 2 mm; and / or, The average thickness of the outer appearance portion (10) disposed opposite to the bottom of the second recess (35) is less than or equal to 0.6 times the average thickness of the outer appearance portion (10).

9. The air duct assembly according to any one of claims 1 to 4, characterized in that, The outer appearance part (10) is a ring structure, the ring structure is cylindrical, and the outer wall of the ring structure is the outer appearance surface; and / or, The air duct assembly also includes a plurality of connecting ribs (70), each of the connecting ribs (70) being a strip structure, the first end of each of the connecting ribs (70) being connected to the exterior part (10), and the second end of each of the connecting ribs (70) being connected to the air duct wall (21).

10. A household appliance, characterized in that, The air duct assembly includes any one of claims 1 to 9.

11. A mold, characterized in that, The mold has a cavity for forming the air duct assembly according to any one of claims 1 to 9, and the mold further has a gate that communicates with the cavity.

Images