Air duct assembly and household appliance

Abstract

The utility model relates to the technical field of household appliances, and particularly discloses an air duct assembly. The air duct assembly comprises an air duct, a centrifugal fan and a first air guide part, the air duct comprises a first side wall, a second side wall and a connecting wall, the first side wall and the second side wall are oppositely arranged, the connecting wall is connected between the first side wall and the second side wall, and an air inlet is formed in the connecting wall; an air outlet of the centrifugal fan communicates with an air inlet of the air duct, and the air outlet direction of the centrifugal fan faces the first side wall. The first air guide part is arranged in the air duct so as to guide outlet air of the centrifugal fan to flow towards the second side wall. And the first air guide part guides more airflow exhausted to the first side wall to the second side wall, so that the air quantity in the air duct is uniformly distributed. The utility model further discloses a household appliance.

Description

Technical Field

[0001] The present application relates to the technical field of household appliances, and in particular to an air duct assembly and a household appliance. Background Art

[0002] At present, centrifugal fans are widely used in various devices due to their advantages such as light weight and light vibration. For example, in household appliances, centrifugal fans are often used in air-cooled refrigerators and dual-temperature cabinets. Taking an air-cooled refrigerator as an example, an air duct is provided in the refrigerator, and the centrifugal fan transports the air flow cooled by the evaporator through the air duct to realize the refrigeration function of the refrigerator. The blades of the centrifugal fan are curved blades, which makes the air outlet direction of the centrifugal fan along the curved direction of the blades, resulting in uneven distribution of air volume in the air duct, which leads to uneven cold volume entering the refrigerator's refrigeration chamber.

[0003] In the related art, an air outlet cover plate with an air guide opening is arranged at the air outlet of the air duct, and the air guide opening is connected to the air outlet of the air duct. The air outlet cover plate includes a main body and an air guide plate, one end of the air guide plate is connected to the main body, and the other end of the air guide plate is inclined in different directions to guide the air outlet direction.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] One end of the air guide plate is tilted, which can only guide the change of the air outlet direction, but cannot solve the problem of uneven distribution of the airflow discharged by the centrifugal fan in the air duct, so the air volume discharged through the air outlet is still uneven.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The embodiments of the present disclosure provide an air duct assembly and a device to evenly distribute the air flow in the air duct.

[0009] According to a first aspect of an embodiment of the present disclosure, an air duct assembly is provided. The air duct assembly includes: an air duct, a centrifugal fan and a first air guide, the air duct includes a first side wall, a second side wall and a connecting wall, the first side wall and the second side wall are arranged opposite to each other, the connecting wall is connected between the first side wall and the second side wall, and the connecting wall is provided with an air inlet; the air outlet of the centrifugal fan is connected to the air inlet of the air duct, and the air outlet direction of the centrifugal fan is toward the first side wall; the first air guide is arranged in the air duct to guide the air outlet of the centrifugal fan to flow toward the second side wall.

[0010] Optionally, the first air guide portion includes a plurality of air guide plates, and the plurality of air guide plates are sequentially arranged along a direction from the second side wall to the first side wall.

[0011] Optionally, along the direction from the second side wall to the first side wall, the distance between two adjacent air guide plates gradually decreases.

[0012] Optionally, the plurality of air guide plates extend along the airflow direction, and the lengths of the air guide plates gradually increase from the second side wall to the first side wall.

[0013] Optionally, the wind guide plate includes a first wind guide plate, the distance between the first wind guide plate and the first side wall is smaller than the distance between the first wind guide plate and the second side wall, the first wind guide plate is a curved plate, and the first wind guide plate at least partially protrudes toward the first side wall.

[0014] Optionally, there are multiple first air guide plates, and the multiple first air guide plates are arranged in sequence along the direction from the second side wall to the first side wall; along the direction from the second side wall to the first side wall, the curvature of the first air guide plates gradually increases.

[0015] Optionally, the wind guide plate further includes a second wind guide plate, the distance between the second wind guide plate and the first side wall is greater than the distance between the second wind guide plate and the second side wall, and the second wind guide plate is parallel to the extension direction of the air duct.

[0016] Optionally, the air duct assembly further includes a second air guide portion, which is disposed in the air duct and is used to guide the airflow to be evenly distributed in the air duct; wherein, along the flow direction of the airflow, the first air guide portion and the second air guide portion are disposed in sequence.

[0017] Optionally, the second air guiding portion includes a plurality of guide plates, and the plurality of guide plates are sequentially spaced apart from each other along a direction from the second side wall to the first side wall, wherein the guide plates are parallel to an extension direction of the air duct.

[0018] According to a second aspect of the embodiments of the present disclosure, there is provided a household appliance, comprising an air duct assembly as described in any one of the above embodiments.

[0019] The air duct assembly provided in the embodiments of the present disclosure can achieve the following technical effects:

[0020] The air duct assembly includes: an air duct, a centrifugal fan and a first air guide portion, the air duct includes a first side wall, a second side wall and a connecting wall, the first side wall and the second side wall are arranged opposite to each other, the connecting wall is connected between the first side wall and the second side wall, and the connecting wall is provided with an air inlet; the air outlet of the centrifugal fan is connected to the air inlet of the air duct, and the air outlet direction of the centrifugal fan is toward the first side wall, so that more airflow is discharged toward the first side wall. The first air guide portion is arranged in the air duct to guide the air outlet of the centrifugal fan to flow toward the second side wall, and guide more airflow discharged toward the first side wall toward the second side wall, so that the airflow is more evenly distributed in the air duct.

[0021] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0023] Figure 1 is a structural schematic diagram of an air duct assembly provided by an embodiment of the present disclosure;

[0024] Figure 2 is a structural schematic diagram of an air duct assembly in which the first air guide portion is not provided;

[0025] Figure 3 yes Figure 1 The enlarged schematic diagram at A in the middle;

[0026] Figure 4 It is a schematic structural diagram of another air duct assembly provided in an embodiment of the present disclosure.

[0027] Reference numerals:

[0028] 10: air duct; 11: first side wall; 12: second side wall; 101: first air outlet; 102: second air outlet; 13: first air guide portion; 130: air guide plate; 131: first air guide plate; 1311: first end portion; 1312: second end portion; 1313: third end portion; 132: second air guide plate; 14: second air guide portion; 140: guide plate;

[0029] 20: Centrifugal fan. DETAILED DESCRIPTION

[0030] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0031] The terms "first", "second", etc. in the specification and claims of the disclosed embodiments and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate for the disclosed embodiments described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0032] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0033] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0034] Unless otherwise stated, the term "plurality" means two or more.

[0035] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0036] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0037] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0038] When the fan is working, the airflow enters the blade space from the axial direction of the fan, and then rotates with the impeller under the drive of the impeller; on the other hand, the airflow increases energy under the action of inertia and leaves the impeller in the radial direction. The fan that does work by the centrifugal force generated is called a centrifugal fan. Centrifugal fans are widely used in various equipment due to their advantages such as light weight and light vibration. Taking an air-cooled refrigerator as an example, there is an air duct in the refrigerator, and the centrifugal fan transports the airflow cooled by the evaporator through the air duct to achieve the refrigeration function of the refrigerator. The blades of the centrifugal fan are curved blades, which makes the air outlet direction of the centrifugal fan along the curved direction of the blades. The airflow entering the air duct is not parallel to the air duct. The air volume on one side of the air duct is large and the air volume on the other side is small. The air volume is unevenly distributed in the air duct, which leads to uneven cold entering the refrigerator's refrigerator or freezer through the exhaust port.

[0039] In the related art, a centrifugal fan is arranged in an air duct, and the air outlet of the centrifugal fan is connected to the air inlet of the air duct. The airflow generated by the centrifugal fan is discharged along the bending direction of the blades. An air outlet cover plate with an air guide port is arranged at the air outlet of the air duct, and the air guide port is connected to the air outlet of the air duct, and the air guide port is connected to the refrigeration compartment of the refrigerator. A guide plate is arranged on the air outlet cover plate, one end of the guide plate is connected to the air outlet cover plate, and the other end is arranged at an angle to guide the discharge direction of the airflow.

[0040] Although the airflow discharge direction can be guided by the air guide plate, because the air volume is unevenly distributed in the air duct, the air flow discharged from the air guide ports at different positions is still not uniform, resulting in uneven cooling entering the cold storage room.

[0041] Combination Figures 1 to 4 As shown, according to an embodiment of the present disclosure, an air duct assembly and a household appliance are provided to evenly distribute the air volume in the air duct within the device, thereby making the airflow discharged along the air duct more uniform.

[0042] The air duct assembly in the embodiment of the present disclosure can be used in a variety of equipment, such as air-cooled refrigerators and dual-temperature cabinets in household appliances, and can also be applied to industrial equipment such as tunnels in coal mines, agricultural equipment such as grain screening, etc. The embodiment of the present disclosure takes an air-cooled refrigerator as an example, and the air duct assembly is arranged in the refrigerator and is connected to the refrigeration compartment of the refrigerator.

[0043] According to a first aspect of an embodiment of the present disclosure, an air duct assembly is provided.

[0044] Optionally, combined Figure 1As shown, the air duct assembly includes: an air duct 10, a centrifugal fan 20 and a first air guide 13. The air duct 10 includes a first side wall 11, a second side wall 12 and a connecting wall. The first side wall 11 and the second side wall 12 are arranged opposite to each other. The connecting wall is connected between the first side wall 11 and the second side wall 12, and the connecting wall is provided with an air inlet. The air outlet of the centrifugal fan 20 is connected to the air inlet of the air duct 10, and the air outlet direction of the centrifugal fan 20 is toward the first side wall 11. The first air guide 13 is arranged in the air duct 10 to guide the air outlet of the centrifugal fan 20 to flow toward the second side wall 12. Among them, Figure 1 In the figure, B represents the flow direction of the airflow generated by the centrifugal fan 20 at the air inlet position of the air duct 10.

[0045] Optionally, the air duct assembly includes multiple exhaust ports, which are sequentially arranged along the extension direction of the air duct 10 and are evenly distributed on the first side wall 11 and the second side wall 12 of the air duct 10. The exhaust ports are connected to the refrigerating compartment of the refrigerator.

[0046] Optionally, the air outlet includes a first air outlet 101 and a second air outlet 102 , the first air outlet 101 is disposed on the first side wall 11 , and the second air outlet 102 is disposed on the second side wall 12 .

[0047] Combination Figure 2 As shown, the arrowed line at the air outlet of the centrifugal fan 20 indicates the flow direction of the airflow, and the blades of the centrifugal fan 20 are bent to the left, so most of the airflow generated by the centrifugal fan 20 is directed toward the first side wall 11, that is, most of the airflow is discharged from the first air outlet 101, and only a small amount of airflow is discharged to the middle of the air duct 10 or to the second side wall 12, and discharged from the second air outlet 102. Due to the uneven distribution of the airflow in the air duct 10, the air volume discharged from the first air outlet 101 and the second air outlet 102 is uneven, thereby causing uneven distribution of cold air in the cold storage room.

[0048] According to the disclosed embodiment, the first air guide portion 13 is arranged in the air duct 10 to guide the outlet air of the centrifugal fan 20 to flow toward the second side wall 12, so that among the more airflow discharged to the first side wall 11, at least part of the airflow flows toward the second side wall 12, thereby making the flow distribution of the airflow discharged to the first side wall 11 and the airflow discharged to the second side wall 12 more uniform, thereby making the air volume in the air duct 10 more evenly distributed.

[0049] Optionally, the first air guide portion 13 includes a plurality of air guide plates 130 , and the plurality of air guide plates 130 are sequentially arranged along a direction from the second side wall 12 to the first side wall 11 .

[0050] A plurality of air guide plates 130 are sequentially arranged in the air duct 10 to guide the airflow in the air duct 10 to be evenly distributed, so as to avoid the situation where the airflow direction is not effectively guided due to too few air guide plates 130 being arranged.

[0051] The number of air guide plates 130 disposed in the air duct 10 is set by the actual size of the air duct 10. When the air duct 10 is wider, the number of air guide plates 130 is greater, and when the air duct 10 is narrower, the number of air guide plates 130 is less.

[0052] Optionally, along the direction from the second side wall 12 to the first side wall 11 , the distance between two adjacent air guide plates 130 gradually decreases.

[0053] The blades of the centrifugal fan 20 are bent toward the first side wall 11, so that more airflow is discharged toward the first side wall 11, and a small amount of airflow is discharged toward the middle of the air duct 10 or the second side wall 12. The smaller the spacing between the air guide plates 130, the less airflow passes through two adjacent air guide plates 130. Because the airflow discharged toward the first side wall 11 is large, the closer to the first side wall 11, the smaller the spacing between the air guide plates 130, and the less airflow passes through the air guide plates 130. Since the airflow discharged toward the second side wall 12 by the centrifugal fan 20 is small, the spacing between the air guide plates 130 close to the second side wall 12 is set larger, and the flow through the air guide plates 130 here is large, thereby guiding more airflow to flow toward the second side wall 12.

[0054] Optionally, the plurality of air guide plates 130 extend along the airflow direction, and the length of the air guide plates 130 gradually increases from the second side wall 12 to the first side wall 11 , where the airflow direction here is the extension direction of the air duct 10 .

[0055] Optionally, combined Figure 3 As shown, the air guide plate 130 includes a first end 1311, a second end 1312 and a third end 1313, and the third end 1313 is arranged between the first end 1311 and the second end 1312. In the direction of airflow, the first end 1311 is inclined toward the second side wall 12, the second end 1312 is inclined toward the first side wall 11, and the third end 1313 protrudes toward the first side wall 11.

[0056] The first ends 1311 of the plurality of air guide plates 130 are not on the same horizontal line, but the height of the first ends 1311 gradually increases along the direction from the second side wall 12 to the first side wall 11, so that the length of the air guide plates 130 gradually increases. Similarly, the second ends 1312 of the plurality of air guide plates 130 are not on the same horizontal line, but the height of the second ends 1312 gradually decreases along the direction from the second side wall 12 to the first side wall 11. In this way, the air guide plates 130 all extend along the airflow direction, and the length of the air guide plates 130 gradually increases along the direction from the second side wall 12 to the first side wall 11.

[0057] The longer the second end portion 1312 extends along the airflow direction, the easier it is to guide the airflow to the air guide plate 130 there.

[0058] The height of the second end portion 1312 gradually decreases along the direction from the second side wall 12 to the first side wall 11. The closer to the first side wall 11, the smaller the length of the second end portion 1312 extending along the airflow direction is, and the less conducive it is to guiding the airflow to flow. In this way, more airflow can flow through the air guide plate 130 close to the second side wall 12.

[0059] The longer the first end portion 1311 extends along the airflow direction, the easier it is to guide the airflow toward the second side wall 12 .

[0060] Along the direction from the second side wall 12 to the first side wall 11, the height of the first end 1311 gradually increases, and the closer to the first side wall 11, the longer the length of the first end 1311 extending along the airflow direction is, and the more conducive it is to guide the airflow to flow toward the second side wall 12. In this way, it is possible to achieve that among the relatively large amount of airflow flowing from the air inlet of the air duct 10 to the first side wall 11, at least part of the airflow is guided by the first end 1311 and flows toward the second side wall 12, so that the airflows flowing toward the first side wall 11 and the second side wall 12 are more uniform.

[0061] Optionally, the second end 1312 is arranged parallel to the extension direction of the air duct 10, that is, the airflow is guided toward the first side wall 11 only by the inclined first end 1311, so that the airflow toward the first side wall 11 and the airflow toward the second side wall 12 are uniform.

[0062] Optionally, the air guide plate 130 includes a first air guide plate 131 , the distance between the first air guide plate 131 and the first side wall 11 is smaller than the distance between the first air guide plate 131 and the second side wall 12 , the first air guide plate 131 is a curved plate, and the first air guide plate 131 at least partially protrudes toward the first side wall 11 .

[0063] The first air guide plate 131 includes a first end 1311, a second end 1312 and a third end 1313. Along the airflow direction, the first end 1311 is inclined toward the second side wall 12, the second end 1312 is inclined toward the first side wall 11, and the third end 1313 is protruded toward the first side wall 11, so that the first air guide plate 131 is a curved plate. Along the airflow direction refers to the extension direction of the air duct 10, from the centrifugal fan 20 to the exhaust port.

[0064] Since the airflow toward the first side wall 11 is larger, the first air guide plate 131 is disposed close to the first side wall 11 to guide the airflow toward the second side wall 12 through the first air guide plate 131, so that the air volume toward the first side wall 11 and the second side wall 12 is more uniform.

[0065] Optionally, there are multiple first air guide plates 131, and the multiple first air guide plates 131 are arranged in sequence along the direction from the second side wall 12 to the first side wall 11; along the direction from the second side wall 12 to the first side wall 11, the curvature of the first air guide plates 131 gradually increases.

[0066] The plurality of first air guide plates 131 are sequentially arranged along the direction from the second side wall 12 to the first side wall 11 to guide a large amount of airflow discharged to the first side wall 11 to flow evenly toward the second side wall 12. When the number of the first air guide plates 131 is small, the amount of airflow guided is small, and the plurality of first air guide plates 131 can guide a large amount of airflow.

[0067] The greater the curvature of the first air guide plate 131, that is, the greater the degree of inclination of the first end portion 1311 toward the second side wall 12, the more conducive it is to guide the airflow to flow toward the second side wall 12. The closer to the first side wall 11, the more air volume discharged by the centrifugal fan 20, and the more air volume that needs to be guided to the second side wall 12, so the curvature of the first air guide plate 131 gradually increases along the direction from the second side wall 12 to the first side wall 11, and the curvature of the first air guide plate 131 close to the first side wall 11 is the largest, so as to guide more air volume to be discharged toward the second side wall 12.

[0068] Optionally, the air guide plate further includes a second air guide plate 132 , the distance between the second air guide plate 132 and the first side wall 11 is greater than the distance between the second air guide plate 132 and the second side wall 12 , and the second air guide plate 132 is parallel to the extension direction of the air duct 10 .

[0069] The second air guide plate 132 is disposed close to the second side wall 12. Since the amount of air discharged to the second side wall 12 by the centrifugal fan 20 is small, the second air guide plate 132 is disposed parallel to the extension direction of the air duct 10 so that the second air guide plate 132 guides the airflow to flow along the extension direction of the second side wall 12.

[0070] Optionally, the number of the second air guide plates 132 is one or more. When the number of the second air guide plates 132 is more than one, the plurality of second air guide plates 132 are sequentially arranged in the air duct 10. The number of second air guide plates 132 is set according to the power of the centrifugal fan 20, the air volume generated, and the size of the air duct.

[0071] Optionally, the air duct assembly further includes a second air guide portion 14, which is disposed in the air duct 10 and is used to guide the airflow to be evenly distributed in the air duct 10; wherein, along the airflow direction, the first air guide portion 13 and the second air guide portion 14 are disposed in sequence. The airflow direction here refers to the extension direction of the air duct 10.

[0072] Optionally, the second air guiding portion 14 includes a plurality of guide plates 140 , and the plurality of guide plates 140 are sequentially spaced apart in a direction from the second side wall 12 to the first side wall 11 , wherein the guide plates 140 are parallel to an extension direction of the air duct 10 .

[0073] The second air guide portion 14 is disposed on a side of the first air guide portion 13 away from the air duct 10. The first air guide portion 13 is used to guide the airflow to be discharged toward the first side wall 11, thereby making the air volume discharged toward the first side wall 11 and the air volume discharged toward the second side wall 12 uniform, and the second air guide portion 14 guides the airflow to flow in a direction parallel to the air duct 10, and makes the airflow distribution in the air duct 10 more uniform.

[0074] Optionally, there is a gap between the first air guiding portion 13 and the second air guiding portion 14 .

[0075] In this way, the first air guide 13 can fully guide part of the airflow to flow toward the second side wall 12, and then the second air guide 14 can guide the airflow to flow evenly in the air duct 10 in a direction parallel to the air duct 10, thereby preventing the airflow from eddying between the first air guide 13 and the second air guide 14.

[0076] Combination Figure 4 As shown, optionally, when the blades of the centrifugal fan 20 bend to the right in some scenarios, a large amount of airflow is discharged to the second side wall 12. At this time, the bending direction and setting position of the first air guide part 13 are opposite to those in the above embodiment.

[0077] According to a second aspect of the embodiments of the present disclosure, a household appliance is provided, the device comprising an air duct assembly as described in any one of the above embodiments.

[0078] The air duct assembly provided in the embodiments of the present disclosure can achieve the following technical effects:

[0079] The air duct assembly includes: an air duct 10, a centrifugal fan 20, a first air guide 13 and a second air guide 14. The first air guide 13 is arranged in the air duct 10 to guide the air discharged by the centrifugal fan 20 to flow toward the second side wall 12. The more airflow discharged to the first side wall 11 is guided to the second side wall 12. The second air guide 14 makes the airflow evenly distributed in the air duct 10 and makes the airflow flow in a direction parallel to the air duct 10, so that the air volume distribution in the air duct 10 is more even. The cold amount discharged to the refrigerated compartment from the first air outlet 101 and the second air outlet 102 is also more even.

[0080] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An air duct assembly, characterized in that: include: The air duct comprises a first side wall, a second side wall and a connecting wall, the first side wall and the second side wall are arranged opposite to each other, the connecting wall is connected between the first side wall and the second side wall, and the connecting wall is provided with an air inlet; a centrifugal fan, wherein an air outlet of the centrifugal fan is connected to an air inlet of the air duct, and an air outlet direction of the centrifugal fan is toward the first side wall; The first air guide portion is arranged in the air duct to guide the air outlet of the centrifugal fan to flow toward the second side wall.

2. The air duct assembly according to claim 1, characterized in that: The first air guide portion includes a plurality of air guide plates, and the plurality of air guide plates are sequentially arranged along a direction from the second side wall to the first side wall.

3. The air duct assembly according to claim 2, characterized in that: Along the direction from the second side wall to the first side wall, the distance between two adjacent air guide plates gradually decreases.

4. The air duct assembly according to claim 2, characterized in that: The plurality of air guide plates extend along the airflow direction, and the lengths of the air guide plates gradually increase from the second side wall to the first side wall.

5. The air duct assembly according to claim 2, characterized in that: The wind guide plate includes a first wind guide plate, the distance between the first wind guide plate and the first side wall is smaller than the distance between the first wind guide plate and the second side wall, the first wind guide plate is a curved plate, and the first wind guide plate at least partially protrudes toward the first side wall.

6. The air duct assembly according to claim 5, characterized in that: There are multiple first air guide plates, and the multiple first air guide plates are arranged in sequence along the direction from the second side wall to the first side wall; Along the direction from the second side wall to the first side wall, the curvature of the first air guide plate gradually increases.

7. The air duct assembly according to claim 2, characterized in that: The wind guide plate also includes a second wind guide plate, the distance between the second wind guide plate and the first side wall is greater than the distance between the second wind guide plate and the second side wall, and the second wind guide plate is parallel to the extension direction of the air duct.

8. The air duct assembly according to any one of claims 1 to 7, characterized in that: Also includes: The second air guide portion is arranged in the air duct and is used to guide the air flow to be evenly distributed in the air duct; Wherein, along the airflow direction, the first air guide portion and the second air guide portion are arranged in sequence.

9. The air duct assembly according to claim 8, characterized in that: The second air guide portion includes a plurality of guide plates, and the plurality of guide plates are sequentially spaced apart in a direction from the second side wall to the first side wall, wherein the guide plates are parallel to an extension direction of the air duct.

10. A household appliance, characterized in that: include: An air duct assembly as claimed in any one of claims 1 to 9.

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