Fan assembly and household appliance

Abstract

The utility model discloses a draught fan assembly and a household appliance, and relates to the technical field of household appliance structures, the draught fan assembly comprises an air duct and a draught fan impeller, the air duct is provided with an air inlet port and an air outlet port which are located in the first direction, and an air duct communicating the air inlet port with the air outlet port; the fan impeller is rotatably arranged in the air duct in the first direction and comprises a plurality of rotary blades, each rotary blade is provided with an inner end, an outer end, a first side edge and a second side edge, the first side edge and the second side edge are connected with the inner end and the outer end, the inner ends of the rotary blades are arranged close to a rotating shaft of the fan impeller, and the outer ends of the rotary blades are arranged close to the rotating shaft of the fan impeller. The second side edge protrudes towards the air outlet port relative to the first side edge, and the first side edge and / or the second side edge are / is provided with an air disturbing structure. The utility model aims to solve the problem of noise during the operation of the fan in the household appliance.

Description

Technical Field

[0001] This utility model relates to the field of household appliance structural technology, and in particular to a fan assembly and a household appliance. Background Technology

[0002] Currently, some household appliances on the market are equipped with fans to meet functional requirements. Since household appliances are mostly used indoors, the requirements for operating noise are relatively high. The rotation of the motor and fan blades in these appliances will generate mechanical vibration noise as well as noise from the airflow inside the machine. Therefore, designing a household appliance with lower noise requires improving the above noise issues. Utility Model Content

[0003] The main purpose of this utility model is to propose a fan assembly and a household appliance, which aims to improve the noise problem of the fan running inside the household appliance.

[0004] To achieve the above objectives, this utility model proposes a fan assembly for use in household appliances, wherein the fan assembly comprises:

[0005] A ventilation duct, having an air inlet port and an air outlet port located in a first direction, and an air channel connecting the air inlet port and the air outlet port; and,

[0006] A fan impeller is rotatably disposed within the air duct in a first direction. The fan impeller includes multiple blades, each blade having an inner end, an outer end, and a first side edge and a second side edge connecting the inner end and the outer end. The inner end of the blade is disposed close to the shaft of the fan impeller, and the second side edge protrudes toward the air outlet relative to the first side edge. The first side edge and / or the second side edge are provided with a wind-disrupting structure.

[0007] In one embodiment, the wind-disrupting structure is provided at the position of the first side edge near the inner end and / or at the position of the second side edge near the outer end.

[0008] In one embodiment, the wind-disrupting structure includes a plurality of wind-disrupting protrusions disposed on the surface of the swivel blade; and / or,

[0009] The wind-disrupting structure includes a plurality of wind-disrupting teeth disposed on the first side edge and / or the second side edge.

[0010] In one embodiment, the wind-disrupting structure includes a plurality of wind-disrupting teeth disposed on the first side edge and / or the second side edge, and the width of the plurality of wind-disrupting teeth gradually increases in the direction near the outer end.

[0011] In one embodiment, the cross-sectional dimensions of the air duct, at least the portion closest to the air outlet, are gradually increased.

[0012] In one embodiment, the fan assembly further includes a cover at the air outlet of the air duct, the cover having an air passage hole and a plurality of air guide vanes disposed at the air passage hole.

[0013] In one embodiment, a plurality of the guide vanes are arranged around the rotation axis of the fan impeller, such that the guide vanes have a proximal end close to the rotation axis and a distal end away from the rotation axis, and the guide vanes extend from the distal end to the proximal end along the rotation direction of the fan impeller.

[0014] In one embodiment, the tilt direction of the guide vane in the first direction is opposite to the tilt direction of the vortex blade.

[0015] In one embodiment, the fan assembly further includes a housing and a drive motor disposed in the housing, the fan duct is disposed inside the housing, and a fan shroud is disposed at one end of the housing near the air inlet port, the drive motor is mounted on the fan shroud, the fan impeller is mounted on the drive end of the drive motor, and a cover is disposed at one end of the housing near the air outlet port.

[0016] In one embodiment, the drive motor is mounted on the shroud via a flexible bracket.

[0017] This utility model also proposes a household appliance, wherein the household appliance includes:

[0018] The housing has an air inlet and an air outlet, and a ventilation channel connecting the air inlet and the air outlet; and,

[0019] A fan assembly includes a fan duct and a fan impeller. The fan duct has an air inlet and an air outlet located in a first direction, and a duct connecting the air inlet and the air outlet. The fan impeller is rotatably disposed within the duct about the first direction. The fan impeller includes multiple blades, each blade having an inner end, an outer end, and a first side edge and a second side edge connecting the inner end and the outer end. The inner end of the blade is located close to the shaft of the fan impeller. The second side edge protrudes towards the air outlet relative to the first side edge. The first side edge and / or the second side edge are provided with a wind-disrupting structure. The fan assembly is located at the air outlet and is used to drive airflow from the air inlet to the air outlet and out through the duct.

[0020] In one embodiment, the household appliance further includes:

[0021] A wet curtain assembly, disposed within the housing, and the wet curtain assembly includes a wet curtain disposed within the ventilation channel; and,

[0022] A water tank, located inside the housing, is used to provide humidification water for the wet curtain assembly.

[0023] In one embodiment, the bottom of the wet curtain extends into the water tank, and the wet curtain is made of water-absorbing material and has ventilation holes inside.

[0024] In one embodiment, the fan assembly includes a housing, the air duct is disposed inside the housing, and a hood is provided at one end of the housing near the air inlet port, and a cover is provided at one end of the housing near the air outlet port, the hood abutting against and fixing the wet curtain.

[0025] In one embodiment, the side wall of the housing is provided with a plurality of air inlets, and the plurality of air inlets form the air inlet.

[0026] The fan assembly includes a cover at the air outlet of the air duct, the cover having an air passage hole and a plurality of air guide vanes at the air passage hole;

[0027] The total air passage area of ​​the plurality of air inlets is greater than the total air passage area of ​​the air passage holes.

[0028] In this invention, the household appliance includes a duct and a fan impeller placed within the duct. The fan impeller rotates to drive airflow within the appliance, thus enabling the appliance to perform its function. The duct structure serves two purposes: firstly, it constrains the airflow path, limiting radial diffusion and concentrating the airflow axially, reducing energy loss and improving air supply efficiency; secondly, the duct limits direct contact between the outer ends of the blades and external air, reducing friction or vortex shedding and thus minimizing noise. Furthermore, the first and / or second side edges of the blade are provided with a wind-disrupting structure. It is understood that when the blade rotates, the wind speed and pressure are high on its windward side, while the wind pressure is low on its leeward side, similar to a partial vacuum. Therefore, local airflow vortices will be formed at the blade edge where the windward and leeward sides intersect, that is, local airflow vortices will be formed at the first and second side edges. The inner end of the blade has a low rotational linear velocity, while the outer end has a high rotational linear velocity, which will also lead to local air pressure differences and airflow vortices. The above two types of vortex oscillations are the main sources of airflow noise. This application provides the wind-disrupting structure on the first and second side edges to generate undulating turbulence, which can effectively disperse the above-mentioned vortex oscillations, reflect the noise in different directions, and form mutual cancellation. At the same time, it reduces the airflow oscillations within the sound frequency that the human ear can receive, thereby further reducing noise and meeting functional requirements. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0030] Figure 1 A cross-sectional schematic diagram of an embodiment of the household appliance provided by this utility model;

[0031] Figure 2 for Figure 1 A three-dimensional exploded structural diagram of a Chinese household appliance;

[0032] Figure 3 for Figure 1 A schematic diagram of the planar structure of the wind turbine impeller;

[0033] Figure 4 for Figure 3 A three-dimensional structural diagram of a wind turbine impeller;

[0034] Figure 5 for Figure 3 Another three-dimensional structural diagram of the wind turbine impeller in the diagram;

[0035] Figure 6 A three-dimensional structural schematic diagram of an embodiment of the fan assembly provided by this utility model;

[0036] Figure 7 for Figure 6 A schematic diagram of the three-dimensional structure of the cover.

[0037] Explanation of icon numbers:

[0038] 1000. Household appliances; 100. Fan assembly; 1. Fan duct; 2. Fan impeller; 21. Rotary blade; 211. First side edge; 212. Second side edge; 213. Wind deflector structure; 213a. Wind deflector teeth; 3. Cover; 31. Air passage; 32. Guide vane; 4. Housing; 5. Drive motor; 6. Fan cover; 7. Flexible support; 200. Housing; 201. Air inlet; 300. Evaporative cooling pad; 400. Water tank.

[0039] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0041] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0042] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0043] Currently, some household appliances on the market are equipped with fans to meet functional requirements. Since household appliances are mostly used indoors, the requirements for operating noise are relatively high. The rotation of the motor and fan blades in these appliances will generate mechanical vibration noise as well as noise from the airflow inside the machine. Therefore, designing a household appliance with lower noise requires improving the above noise issues.

[0044] In view of this, the present invention proposes a fan assembly, please refer to [link / reference]. Figures 1 to 7 The following is an embodiment of the wind turbine assembly proposed in this application. The wind turbine assembly will be described in detail below with reference to the specific drawings.

[0045] Please see Figures 1 to 3The fan assembly 100 includes a fan duct 1 and a fan impeller 2. The fan duct 1 has an air inlet port and an air outlet port located in a first direction, and a duct connecting the air inlet port and the air outlet port. The fan impeller 2 is rotatably disposed in the duct around the first direction. The fan impeller 2 includes a plurality of blades 21. Each blade 21 has an inner end, an outer end, and a first side edge 211 and a second side edge 212 connecting the inner end and the outer end. The inner end of the blade 21 is disposed close to the shaft of the fan impeller 2. The second side edge 212 protrudes toward the air outlet port relative to the first side edge 211. The first side edge 211 and / or the second side edge 212 are provided with a wind deflector structure 213.

[0046] In the technical solution of this utility model, the household appliance 1000 is provided with a duct 1 and a fan impeller 2 placed inside the duct 1. The fan impeller 2 rotates to drive the airflow within the household appliance 1000, thereby realizing the function of the household appliance 1000. The duct 1 structure serves two purposes: firstly, it constrains the airflow path, limits radial diffusion, and concentrates the airflow axially, reducing energy loss and improving air supply efficiency; secondly, the duct 1 restricts direct contact between the outer end of the blades 21 and the external air, reducing friction or vortex shedding between the outer end of the blades 21 and the surrounding air, thus reducing noise. Furthermore, the first side edge 211 and / or the second side edge 212 of the blade 21 are provided with a wind-disrupting structure 213. It is understood that when the blade 21 rotates, its wind speed and wind pressure are high on the windward side, while the wind pressure is low on the leeward side, similar to a partial vacuum. Therefore, a local airflow vortex will be formed at the blade edge where the windward and leeward sides intersect, that is, a local airflow vortex will be formed at the first side edge 211 and the second side edge 212. The inner end of the blade 21 has a low rotational linear velocity, while the outer end has a high rotational linear velocity, which will also lead to a local air pressure difference and airflow vortex. The above two types of vortex oscillations are the main sources of airflow noise. This application provides the wind-disrupting structure 213 on the first side edge 211 and the second side edge 212 to generate undulating turbulence, which can effectively disperse the above-mentioned vortex oscillations, reflect the noise in different directions, and form mutual cancellation. At the same time, it reduces the airflow oscillation within the sound frequency that the human ear can receive, thereby further reducing noise and meeting functional requirements. It should be noted that the wind-disrupting structure 213 is provided on either the first side edge 211 or the second side edge 212, which can achieve a certain noise reduction effect. In this embodiment, the wind-disrupting structure 213 is provided on both the first side edge 211 and the second side edge 212.

[0047] It is understood that the fan impeller 2 can be either an axial flow impeller or a centrifugal impeller. In this embodiment, an axial flow impeller is mainly used. Based on this, due to the structural function of the fan impeller 2, when the fan impeller 2 rotates, the air is driven to move in the direction of the axis of the fan impeller 2. At the same time, due to the centrifugal force of the fan impeller 2 rotation, the airflow diverges from the inner end to the outer end. Therefore, the position of the first side edge 211 near the inner end is the main air intake section, and the position of the second side edge 212 near the outer end is the main air outlet section. Therefore, in this embodiment, the wind-disrupting structure 213 is set at the position of the first side edge 211 near the inner end and the position of the second side edge 212 near the outer end. While reducing the size of the wind-disrupting structure 213 to reduce the processing difficulty and avoid affecting the normal function of the blade 21, the noise reduction function of the wind-disrupting structure 213 is guaranteed.

[0048] Specifically, the wind-disrupting structure 213 is a structure that disrupts the smoothness of the first side edge 211 and the second side edge 212. It can be a wind-disrupting protrusion located on the blade surface of the rotor 21 near the first side edge 211 and the second side edge 212, or it can be a notch formed on the first side edge 211 and the second side edge 212 to create a wind-disrupting tooth 213a. It can also be other structures capable of disrupting the wind; this is not limited to any specific type. Please refer to [link / reference]. Figures 3 to 5 This application mainly proposes the structure of the wind-disrupting protrusions and the wind-disrupting teeth 213a. That is, the wind-disrupting structure 213 includes a plurality of wind-disrupting protrusions disposed on the blade surface of the rotor blade 21; and / or, the wind-disrupting structure 213 includes a plurality of wind-disrupting teeth 213a disposed on the first side edge 211 and / or the second side edge 212. The wind-disrupting protrusions and the wind-disrupting teeth 213a are located in different positions, so they can be combined. The actual arrangement method depends on the requirements and is not limited here.

[0049] In this embodiment, the wind-disrupting structure 213 is configured as a plurality of wind-disrupting teeth 213a located on the first side edge 211 and the second side edge 212. Compared with the wind-disrupting protrusion, the wind-disrupting teeth 213a can be formed simply by opening notches on the first side edge 211 and the second side edge 212 on the basis of the complete blade 21. On the one hand, the processing method is simple and easy to form; on the other hand, it can even be further processed on the basis of existing products without additional mold opening. Based on this, this application limits the width of the plurality of wind-disrupting teeth 213a to gradually increase in the direction near the outer end. This fits the situation described above where, during the rotation of the fan impeller 2, the airflow diverges from the inner end to the outer end due to the centrifugal force of the fan impeller 2, making the flow velocity at the inner end less than that at the outer end. The size of the wind-disrupting teeth 213a is set accordingly, which is beneficial for noise reduction.

[0050] In addition, please see Figure 1 The air duct 1 is used to enclose and form the air duct, so as to restrict the airflow direction and achieve a certain noise reduction effect, as described above. On this basis, this embodiment also limits the cross-sectional size of the air duct, at least the part near the air outlet, to gradually increase, that is, the air outlet of the air duct is set as a horn-shaped structure, which can reduce the wind speed, stabilize and balance the airflow, reduce local resistance, and help reduce noise.

[0051] In addition, please see Figure 7 To prevent external debris from entering the air duct from the air outlet port, or even from contacting and colliding with the rotor blade 21 and causing damage to the rotor blade 21, a cover 3 is generally provided at the air outlet port in the art to isolate debris through the cover 3. That is, the fan assembly 100 in this application also includes a cover 3 located at the air outlet port of the air duct 1. The cover 3 has an air passage hole 31, and a plurality of air guide blades 32 are provided at the air passage hole 31.

[0052] Please see Figure 2 It is understandable that, given that the guide vane 32 is primarily used to isolate debris, and since it is located within the airflow channel, there is a risk of turbulence. When the airflow is turbulent, it may cause vibration and noise. Therefore, the structure of the guide vane 32 generally needs to be modified. This could be done by making the guide vane 32 smaller to avoid affecting the airflow, or by setting the rotation direction of the guide vane 32 to be consistent with the rotation direction of the swivel blade 21, so that the airflow, driven by the swivel blade 21, cuts through the airflow as it rotates along the swivel blade 21. The airflow is directed in a direction that avoids disturbing the airflow while stabilizing and balancing it to reduce noise. The structure in which the rotation direction of the guide vane 32 is set to be consistent with the rotation direction of the blade 21 is that multiple guide vanes 32 are arranged around the rotation axis of the fan impeller 2, so that the guide vane 32 has a proximal end close to the rotation axis and a distal end far from the rotation axis. The guide vane 32 extends from the distal end to the proximal end along the rotation direction of the fan impeller 2, thus meeting the functional requirements and improving the appearance when the cover 3 is used as an appearance component.

[0053] Further, please refer to Figure 1When the swivel blade 21 drives the gas to move along its rotation axis to form an airflow, it is subjected to a tangential force during the rotation of the swivel blade 21, causing the airflow to have a certain angle of inclination, that is, the airflow tends to be perpendicular to the windward side of the swivel blade 21. At this time, if the tilt direction of the guide vane 32 in the first direction is the same as that of the swivel blade 21, the airflow tends to contact the blade surface of the guide vane 32 perpendicularly. Thus, the guide vane 32 causes a large obstruction to the airflow, which disturbs the airflow, generates noise, and affects the air output performance of the fan assembly 100. Therefore, in this embodiment, the tilt direction of the guide vane 32 in the first direction is set to be opposite to that of the swivel blade 21, so that the airflow flows out along the direction that is close to the blade surface of the guide vane 32 as much as possible, reducing the interference of the guide vane 32 on the airflow, which is beneficial to the noise reduction setting of the fan assembly 100.

[0054] In addition, please continue to refer to Figure 1 The fan assembly 100 further includes a housing 4 and a drive motor 5 disposed on the housing 4. The air duct 1 is disposed inside the housing 4, and a shroud 6 is disposed at the end of the housing 4 near the air inlet port. The drive motor 5 is mounted on the shroud 6, and the fan impeller 2 is mounted on the drive end of the drive motor 5. A cover 3 is disposed at the end of the housing 4 near the air outlet port. The cover 3 disposed at the air outlet port for isolating debris has been described above. Similarly, a similar structure needs to be provided at the air inlet port. In this embodiment, the shroud 6 is disposed at the air inlet port to achieve a similar function. Based on the above structure, the drive motor 5 is disposed inside the housing 4 to drive the fan impeller 2 located in the air duct. It can be understood that the drive motor 5 can be fixed inside the air duct 1 by setting an independent bracket, or it can be fixed to the air duct 6 using the air shroud 6 structure. In this embodiment, the drive motor 5 is fixed by the air shroud 6 structure, which reduces the number of fixed structures, reduces costs, and avoids the impact of too many structural components inside the air duct 1 on the airflow.

[0055] Furthermore, the drive motor 5 is generally a mature product and does not have its own mounting structure for installation onto the non-standard fan cover 6. Therefore, a corresponding mounting structure needs to be set on the fan cover 6, or an independent fixing structure needs to be set to fix the drive motor 5 before installing it onto the fan cover 6. In this embodiment, the drive motor 5 is mounted on the fan cover 6 through a flexible bracket 7. After fixing the drive motor 5 to the flexible bracket 7, the flexible bracket 7 is then fixed to the fan cover 6. This facilitates installation and operation. On the other hand, the fan cover 6 and the flexible bracket 7 clamp the drive motor 5. A buffer structure can be set between the drive motor 5 and the flexible bracket 7 and / or the fan cover 6 to reduce the vibration of the drive motor 5 and thus reduce noise. In addition, the flexible bracket 7 itself has a certain degree of flexible buffering performance, which can dampen the vibration of the drive motor 5 and reduce noise.

[0056] Please see Figures 1 to 2 This application also proposes a household appliance 1000, wherein the household appliance 1000 includes a housing 200 and a fan assembly 100, the housing 200 having an air inlet and an air outlet and a ventilation channel connecting the air inlet and the air outlet; the specific structure of the fan assembly 100 refers to the above embodiments. Since the household appliance 1000 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described in detail here. The fan assembly 100 is located at the air outlet and is used to drive airflow from the air inlet to the air outlet and blow it out through the air duct.

[0057] It is understood that the household appliance 1000 can be a humidifier for humidifying indoor air, an air purifier for purifying indoor air, or a fan for supplying air. All of these can be equipped with the noise reduction solutions described above to reduce noise during use and improve the user experience. Specifically, in this embodiment, the household appliance 1000 is configured as a humidifier. Therefore, the household appliance 1000 also includes a wet curtain 300 assembly and a water tank 400. The wet curtain 300 assembly is disposed within the housing 200, and includes a wet curtain 300 disposed within the ventilation channel. The water tank 400 is disposed within the housing 200 and is used to provide humidifying water for the wet curtain 300 assembly. Thus, the airflow driven by the fan assembly carries away the moisture inside the household appliance 1000, which is then blown out through the air duct within the fan duct 1, achieving a humidification effect on the environment. The water tank 400 supplies humidifying water to the wet curtain 300 assembly, and the fan assembly 100 drives the airflow through the wet curtain 300 located in the ventilation duct to remove the moisture on the wet curtain 300, thereby humidifying the airflow. Then, when the airflow flows out of the duct and enters the ambient air, it humidifies the ambient air, thus realizing the humidification function of the household appliance 1000.

[0058] Specifically, the evaporative cooling pad 300 can carry humidifying water in various ways, as long as the airflow can carry away the moisture on the evaporative cooling pad 300. The water tank 400 supplies humidifying water to the evaporative cooling pad 300 in a manner that adapts to the way the evaporative cooling pad 300 carries humidifying water. That is, when the evaporative cooling pad 300 carries humidifying water on its surface, a water pump structure needs to be installed in the water tank 400 to pump the water in the water tank 400 to the evaporative cooling pad 300, thus meeting the structural and functional requirements. When the evaporative cooling pad 300 is made of a water-absorbing material, it is placed inside the water tank 400, and the above function can be achieved by utilizing the water absorption characteristics of the evaporative cooling pad 300. In this embodiment, the evaporative cooling pad 300 is made of a water-absorbing material so that it can automatically absorb the humidifying water in the water tank 400 through its characteristics. At the same time, ventilation holes are provided inside it so that airflow can pass through the evaporative cooling pad 300 to carry away the moisture. The structure is simple and the cost is low.

[0059] Understandably, to prevent airflow through the evaporative cooling pad 300, which could cause instability and noise due to movement, and to prevent movement of the evaporative cooling pad 300 due to moving the household appliance 1000, a structure is needed to fix the evaporative cooling pad 300 inside the household appliance 1000. Based on this, in this embodiment, the fan assembly 100 includes a housing 4, with the fan duct 1 disposed inside the housing 4. A fan hood 6 is provided at one end of the housing 4 near the air inlet, and a cover 3 is provided at one end of the housing 4 near the air outlet. The fan hood 6 abuts against and fixes the evaporative cooling pad 300. Thus, by using the fan hood 6 to abut against the evaporative cooling pad 300, stable installation of the evaporative cooling pad 300 is achieved. The fan hood 6 performs its own function while also fixing the evaporative cooling pad 300, reducing the need for additional fixing structures and lowering structural costs.

[0060] Furthermore, the side wall of the housing 200 is provided with multiple air inlets 201, which together form the air inlet. The fan assembly 100 includes a cover 3 located at the air outlet of the air duct 1. The cover 3 has air passage holes 31, and multiple guide vanes 32 are provided at the air passage holes 31. The total air passage area of ​​the multiple air inlets 201 is greater than the total air passage area of ​​the air passage holes 31. To ensure the normal operation of the household appliance 1000, that is, to ensure the air intake of the household appliance 1000, this embodiment limits the total air passage area of ​​the air intake end of the household appliance 1000 to be greater than the total air passage area of ​​the air outlet end of the household appliance 1000. In other words, the total air passage area of ​​the multiple air inlets 201 is greater than the total air passage area of ​​the air passage holes 31, thus meeting functional requirements and ensuring the air volume of the household appliance 1000.

[0061] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A fan assembly for use in household appliances, characterized in that, include: The air duct has an air inlet port and an air outlet port located in a first direction, and an air channel connecting the air inlet port and the air outlet port; as well as, A fan impeller is rotatably disposed within the air duct in a first direction. The fan impeller includes multiple blades, each blade having an inner end, an outer end, and a first side edge and a second side edge connecting the inner end and the outer end. The inner end of the blade is disposed close to the shaft of the fan impeller, and the second side edge protrudes toward the air outlet relative to the first side edge. The first side edge and / or the second side edge are provided with a wind-disrupting structure.

2. The wind turbine assembly as described in claim 1, characterized in that, The wind-disrupting structure is provided at the position of the first side edge near the inner end and / or at the position of the second side edge near the outer end.

3. The wind turbine assembly as described in claim 1, characterized in that, The wind-disrupting structure includes a plurality of wind-disrupting protrusions disposed on the surface of the rotary blade; and / or, The wind-disrupting structure includes a plurality of wind-disrupting teeth disposed on the first side edge and / or the second side edge.

4. The wind turbine assembly as described in claim 1, characterized in that, The wind-disrupting structure includes a plurality of wind-disrupting teeth disposed on the first side edge and / or the second side edge, and the width of the plurality of wind-disrupting teeth gradually increases in the direction near the outer end.

5. The wind turbine assembly as described in claim 1, characterized in that, The cross-sectional dimensions of the air duct, at least the portion closest to the air outlet, are gradually increased.

6. The wind turbine assembly as described in claim 1, characterized in that, The fan assembly also includes a cover at the air outlet of the air duct, the cover having an air passage hole and multiple air guide vanes at the air passage hole.

7. The wind turbine assembly as described in claim 6, characterized in that, Multiple guide vanes are arranged around the rotation axis of the fan impeller, such that each guide vane has a proximal end close to the rotation axis and a distal end far from the rotation axis, and the guide vane extends from the distal end to the proximal end along the rotation direction of the fan impeller.

8. The wind turbine assembly as described in claim 7, characterized in that, The direction of inclination of the guide vane in the first direction is opposite to the direction of inclination of the vortex blade.

9. The wind turbine assembly as claimed in claim 1, characterized in that, The fan assembly also includes a housing and a drive motor disposed in the housing. The fan duct is disposed inside the housing, and a fan cover is provided at one end of the housing near the air inlet port. The drive motor is mounted on the fan cover, the fan impeller is mounted on the drive end of the drive motor, and a cover is provided at one end of the housing near the air outlet port.

10. The wind turbine assembly as claimed in claim 9, characterized in that, The drive motor is mounted on the wind shield via a flexible bracket.

11. A household appliance, characterized in that, include: The housing has an air inlet and an air outlet, as well as a ventilation channel connecting the air inlet and the air outlet; as well as, The fan assembly is the fan assembly as described in any one of claims 1 to 9, disposed at the air outlet, the fan assembly being used to drive airflow from the air inlet to the air outlet, and blow it out through the air duct.

12. The household appliance as described in claim 11, characterized in that, The household appliances also include: A wet curtain assembly, disposed within the housing, and the wet curtain assembly includes a wet curtain disposed within the ventilation channel; and, A water tank, located inside the housing, is used to provide humidification water for the wet curtain assembly.

13. The household appliance as described in claim 12, characterized in that, The bottom of the wet curtain extends into the water tank, and the wet curtain is made of water-absorbing material with ventilation holes inside.

14. The household appliance as described in claim 13, characterized in that, The fan assembly includes a housing, the air duct is disposed inside the housing, and a hood is provided at one end of the housing near the air inlet port, and a cover is provided at one end of the housing near the air outlet port. The hood abuts against and fixes the wet curtain.

15. The household appliance as described in claim 11, characterized in that, The side wall of the housing has multiple air inlets, which together form the air inlet. The fan assembly includes a cover at the air outlet of the air duct, the cover having an air passage hole and a plurality of air guide vanes at the air passage hole; The total air passage area of ​​the plurality of air inlets is greater than the total air passage area of ​​the air passage holes.

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