Air guide ring assembly, fan assembly and range hood

Abstract

The invention provides an air guide ring assembly, a fan assembly and a range hood, the air guide ring assembly comprises a connecting piece and a flow guide piece, the connecting piece is enclosed to form a containing area, and the connecting piece is provided with a connecting part on the periphery of the containing area; the flow guide piece is annular and defines an airflow channel; at least part of the flow guide part is located in the containing area, and the flow guide part can rotate in the circumferential direction relative to the connecting part. According to the air guide ring assembly and the flow guide piece, the air guide ring assembly and the flow guide piece are located in the containing area of the connecting piece and can rotate in the circumferential direction relative to the connecting piece, when the air guide ring assembly is applied to a fan assembly, the air guide ring assembly can rotate along with an impeller of the fan assembly, and therefore the rotating speed of the impeller and the uniform airflow speed entering the impeller can be matched, and the flow guide effect is improved; and the air inlet efficiency of the whole machine can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of range hoods, and in particular to an air guide ring assembly, a fan assembly and a range hood. Background Art

[0002] The main working process of a range hood is to use the impeller of the fan assembly to draw cooking fumes into the range hood through the air inlet, filter the fumes through the filter and impeller, and finally expel them through the air outlet, thus purifying the kitchen environment. The air guide ring assembly, as the core component of the fan assembly, is used to guide the airflow at the air inlet and has a significant impact on the performance of the range hood.

[0003] Existing air guide ring components all adopt a relatively simple structure, are fixed relative to the impeller, have poor air guide effect, and have low air intake efficiency, which affects the smoke extraction effect of the range hood and reduces the user experience. Summary of the Invention

[0004] In order to at least partially solve the problems existing in the prior art, according to one aspect of the present invention, an air guide ring assembly is provided, and the technical solution is as follows.

[0005] The air guide ring assembly includes a connecting member and a flow guide member, the connecting member encloses a accommodating area, and the connecting member has a connecting portion on the periphery of the accommodating area; the flow guide member is annular and defines an air flow channel; wherein, the flow guide member is at least partially located in the accommodating area and is rotatable in the circumferential direction relative to the connecting portion.

[0006] In the air guide ring assembly of the present invention, the guide member is located in the accommodating area of ​​the connecting member and is rotatable in the circumferential direction relative to the connecting member. When applied to a fan assembly, it can rotate together with the impeller of the fan assembly, thereby matching the impeller speed and evenly distributing the air flow speed entering the impeller, thereby improving the guide effect. When applied to a range hood, it can improve the air intake efficiency of the entire machine.

[0007] For example, the connector has an inner ring sidewall, and the flow guide has an outer ring sidewall, which are rotatably connected via a mating structure. This arrangement not only allows the connector to rotate circumferentially, but also simplifies the structure and facilitates installation and removal of the connector and flow guide.

[0008] Exemplarily, the mating structure includes a first groove, a second groove, and a spherical member. One of the first groove and the second groove is located on the inner ring sidewall, and the other is located on the outer ring sidewall. The second groove and the first groove together form a receiving cavity, and the spherical member is disposed within the receiving cavity. This arrangement not only ensures axial stability of the flow guide and the connecting member, but also radial stability, effectively reducing friction between the flow guide and the connecting member, and enabling the flow guide to rotate circumferentially relative to the connecting member. The structure is simple and easy to install or remove.

[0009] Exemplarily, the mating structure includes a toothed portion and a toothed mating portion, one of which is disposed on the inner ring sidewall, and the other of which is disposed on the outer ring sidewall, with the toothed portion meshing with the toothed mating portion. This arrangement provides a high load-bearing capacity through the cooperation between the toothed portion and the toothed mating portion, ensuring not only axial stability of the flow guide and the connector, but also radial stability, enabling the flow guide to rotate circumferentially relative to the connector.

[0010] Exemplarily, the air guide comprises an annular body and multiple air guide structures. The annular body has an air guide surface. The multiple air guide structures are disposed on the air guide surface and are spaced apart along the circumference of the annular body. With this arrangement, when the air guide ring assembly is applied to a fan assembly, the air guide structures can generate an airflow that rotates toward the interior of the fan assembly, improving the uniformity of the airflow. The airflow has a certain tangential velocity, so that when the airflow enters the airflow channel, it tends to move in a direction close to the impeller's rotation direction, with a small tangential velocity difference relative to the blades. This reduces airflow separation in the airflow channel, optimizes airflow flow in the airflow channel, and solves problems such as noise generated by vortex impact due to uneven airflow in the airflow channel. When applied to a range hood, the air intake efficiency of the entire unit can be improved.

[0011] For example, the annular body has arcuate segments, and the airflow channel is formed by enclosing the arcuate segments, and the airflow channel gradually decreases in the air inlet direction. This arrangement gradually increases the flow rate of gas entering the airflow channel, further enhancing the diversion effect and improving the air intake efficiency.

[0012] For example, the arc segment is connected to multiple latches, with the latches and the air guide structure located on opposite sides of the arc segment. This arrangement prevents the latches from causing uneven airflow in the airflow channel. Furthermore, when the air guide ring assembly is applied to a fan assembly, it facilitates the connection between the air guide and the impeller, ensuring a stable connection between the air guide and the impeller.

[0013] For example, the plurality of latching portions are spaced apart along the circumference of the annular body. This arrangement further improves the stability of the connection between the guide member and the impeller when the air guide ring assembly is applied to a fan assembly.

[0014] For example, the latch portion is arc-shaped along the circumference of the annular body, and the central angle subtended by the latch portion is between 45° and 60°. This arrangement ensures the strength of the latch portion and eases manufacturing. When the air guide ring assembly is applied to a fan assembly, it ensures the stability of the connection between the deflector and the impeller.

[0015] For example, the arc segment has a distal end, and the annular body has a straight segment, which is connected to the distal end to form the outer ring sidewall. In this arrangement, the guide member is not only simple in structure, but also convenient for forming an airflow channel and facilitating the arrangement of partial matching structures.

[0016] For example, the air guide structure is curved along the rotational direction of the annular body. This arrangement, when applied to a fan assembly, generates airflow that rotates along the annular body toward the interior of the fan assembly, improving airflow uniformity. The airflow has a certain tangential velocity, which allows the airflow to move closer to the impeller's rotational direction upon entering the airflow channel. This further reduces the tangential velocity difference relative to the blades, thereby further optimizing the airflow in the airflow channel and resolving issues such as vortex impact and noise generation caused by uneven airflow in the airflow channel. When applied to a range hood, this can improve the overall air intake efficiency of the unit.

[0017] For example, the flow guiding structure gradually decreases from the outer ring to the inner ring of the annular body. This arrangement can accelerate the airflow around the annular body to enter the airflow channel, thereby improving the flow guiding and rectifying effects.

[0018] According to another aspect of the present invention, a fan assembly is provided, comprising an impeller, a volute, and the aforementioned air guide ring assembly. The connector is connected to the volute via a connecting portion, and the air guide is connected to the impeller. Thus, when the impeller rotates, the air guide is simultaneously driven to rotate, thereby ensuring that the air guide is rotatable circumferentially relative to the connector. Because the aforementioned air guide ring assembly has the aforementioned beneficial effects, a fan assembly including the aforementioned air guide ring assembly also has the aforementioned beneficial effects, which will not be further elaborated herein.

[0019] For example, the impeller has a connecting disc with a flanged portion formed thereon, and a latching portion is provided on the flanged portion; the deflector is provided with a latching portion, and the latching portion and the latching portion engage with the latching portion. This arrangement not only ensures the stability of the connection between the impeller and the deflector, but also facilitates installation and removal, and facilitates cleaning and maintenance.

[0020] According to another aspect of the present invention, a range hood is provided, comprising a housing and the aforementioned fan assembly, the fan assembly being disposed within the housing. Since the aforementioned fan assembly has the aforementioned beneficial effects, a range hood including the aforementioned fan assembly also has the aforementioned beneficial effects, which will not be further detailed herein.

[0021] This summary introduces a series of simplified concepts that will be further described in the detailed description. This summary is not intended to limit the key features and essential features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0022] The advantages and features of the present invention are described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following drawings of the present invention are hereby incorporated into the present invention for understanding the present invention. The drawings show embodiments of the present invention and their descriptions, and are used to explain the principles of the present invention. In the drawings,

[0024] Figure 1 A perspective view of a fan assembly according to an exemplary embodiment of the present invention;

[0025] Figure 2 for Figure 1 A cross-sectional view of the blower assembly is shown;

[0026] Figure 3 for Figure 2 Enlarged view of part A in the middle;

[0027] Figure 4 for Figure 1 A perspective view of the air guide ring assembly shown;

[0028] Figure 5 for Figure 4 An exploded view of the air guide ring assembly is shown;

[0029] Figure 6 for Figure 4 A cross-sectional view of the air guide ring assembly shown;

[0030] Figure 7 for Figure 4 A perspective view of the air guide member in the air guide ring assembly;

[0031] Figure 8 A perspective view of a fan assembly according to another exemplary embodiment of the present invention;

[0032] Figure 9 for Figure 8 A cross-sectional view of the blower assembly is shown;

[0033] Figure 10 for Figure 9 Enlarged view of middle part B;

[0034] Figure 11 for Figure 8 A perspective view of the air guide ring assembly shown;

[0035] Figure 12 for Figure 11 A cross-sectional view of the air guide ring assembly shown;

[0036] Figure 13 for Figure 11 A perspective view of the air guide member in the air guide ring assembly;

[0037] Figure 14 for Figure 11 A perspective view of the connecting member in the air guide ring assembly shown;

[0038] Figure 15 for Figure 8 A perspective view of the impeller in the fan assembly is shown.

[0039] The above drawings include the following reference numerals:

[0040] 1. Fan assembly; 10. Air guide ring assembly; 110. Connector; 111. Accommodation area; 112. Inner ring sidewall; 113. Connecting portion; 1131. First fixing hole; 120. Air guide; 121. Airflow channel; 122. Outer ring sidewall; 123. Ring body; 1231. Air guide surface; 1232. Arc segment; 1232a. Distal end; 1233. Straight segment; 1234. Outer ring; 1235. Inner ring; 1 24. Diversion structure; 125. Clamping portion; 130. Matching structure; 131. First groove; 132. Second groove; 133. Spherical member; 134. Accommodating chamber; 135. Tooth-shaped portion; 1351. First tooth; 1352. First tooth groove; 136. Tooth-matching portion; 1361. Second tooth; 1362. Second tooth groove; 20. Impeller; 210. Connecting disc; 211. Flanged portion; 212. Clamping fitting portion; 30. Volute. DETAILED DESCRIPTION

[0041] In the following description, a large amount of detail is provided to facilitate a thorough understanding of the present invention. However, it will be appreciated by those skilled in the art that the following description merely illustrates preferred embodiments of the present invention, and that the present invention may be practiced without one or more of these details. Furthermore, to avoid confusion with the present invention, some technical features well known in the art have not been described in detail.

[0042] To provide a thorough understanding of the embodiments of the present invention, a detailed description of the structure will be provided in the following description. It should be understood that the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of the present invention are described below in detail, but in addition to these detailed descriptions, the present invention may also have other embodiments.

[0043] An embodiment of the present invention provides an air guide ring assembly. The air guide ring assembly of the present invention can be installed on a fan assembly, which can be used in a range hood. The following describes an air guide ring assembly according to an embodiment of the present invention in detail with reference to the accompanying drawings.

[0044] See also Figure 1 、 Figure 4 、 Figure 5 、 Figure 8 、 Figure 11 and Figure 14 The air guide ring assembly 10 may include a connector 110 and a flow guide 120. The connector 110 may enclose a receiving area 111, and the connector 110 may have a connecting portion 113 on the periphery of the receiving area 111. The flow guide 120 may be annular and define an air flow channel 121. The flow guide 120 may be at least partially located in the receiving area 111 and rotatable in the circumferential direction relative to the connecting portion 113. Specifically, the main body of the flow guide 120 may be located in the receiving area 111. The edge portion of the flow guide 120 may be located outside the receiving area 111 and abut against the connecting portion 113.

[0045] In the air guide ring assembly 10 of the present invention, the guide member 120 is located in the accommodating area 111 of the connecting member 110 and is rotatable in the circumferential direction relative to the connecting member 110. When applied to the fan assembly 1, it can rotate together with the impeller 20 of the fan assembly 1, thereby matching the rotation speed of the impeller 20 and uniformly aligning the air flow speed entering the impeller 20, thereby improving the guide effect. When applied to a range hood, it can improve the air intake efficiency of the entire machine.

[0046] Preferably, the connecting member 110 may be in a circular ring shape, and the flow guide member 120 may also be in a circular ring shape, so that the flow guide member 120 can rotate relative to the connecting member 110 .

[0047] Again, refer to Figure 1 、 Figure 4 、 Figure 5 、 Figure 8 、 Figure 11 and Figure 14, the connecting member 110 may have an inner ring side wall 112. The flow guide 120 may have an outer ring side wall 122. The inner ring side wall 112 and the outer ring side wall 122 may be rotatably connected via a matching structure 130. The inner ring side wall 112 and the outer ring side wall 122 may be parallel. Preferably, when the connecting member 110 and the flow guide 120 are both annular, the inner ring side wall 112 and the outer ring side wall 122 may be concentrically arranged. In this way, not only is the connecting member 110 rotatable in the circumferential direction, but the structure is simple, and it is also convenient to install or disassemble the connecting member 110 and the flow guide 120.

[0048] See also Figures 2 to 5 The matching structure 130 may include a first groove 131, a second groove 132 and a spherical member 133. The spherical member 133 may be a ball or the like. One of the first groove 131 and the second groove 131 may be provided on the inner ring sidewall 112. The other of the first groove 131 and the second groove 131 may be provided on the outer ring sidewall 122. Figure 3 and Figure 5 The first groove 131 can be provided on the inner ring sidewall 112, and the second groove 131 can be provided on the outer ring sidewall 122. Optionally, the second groove 132 can also be provided on the inner ring sidewall 112, and the first groove 131 can also be provided on the outer ring sidewall 122. The second groove 132 and the first groove 131 can enclose a receiving cavity 134. The spherical member 133 is provided within the receiving cavity 134. The spherical member 133 can abut against the walls of the first groove 131 and the second groove 132. This ensures not only the axial stability of the flow guide 120 and the connecting member 110, but also their radial stability, effectively reducing friction between the flow guide 120 and the connecting member 110 and enabling the flow guide 120 to rotate circumferentially relative to the connecting member 110. This structure is simple and easy to install or remove. Optionally, to reduce overall weight, the mating structure 130 is made of high-strength plastic, which has a long service life and is not susceptible to corrosion.

[0049] In some embodiments, the mating structure 130 may further include a retaining frame (not shown), which may be disposed within the accommodating cavity 134. The spherical members 133 may be evenly distributed within the accommodating cavity 134 via the retaining frame. This prevents the spherical members 133 from moving freely within the accommodating cavity 134, prevents them from falling off, and guides their rotation, thereby providing lubrication.

[0050] In some embodiments, a small amount of lubricant may be added into the accommodating cavity 134 to further reduce the friction between the flow guide 120 and the connecting member 110 .

[0051] See also Figure 9 、 Figure 10 、 Figure 11 、 Figure 13 and Figure 14 The matching structure 130 may include a toothed portion 135 and a toothed matching portion 136. One of the toothed portion 135 and the toothed matching portion 136 may be provided on the inner ring sidewall 112. The other of the toothed portion 135 and the toothed matching portion 136 may be provided on the outer ring sidewall 122. Figure 13 and Figure 14 The toothed portion 135 can be provided on the inner ring sidewall 112. The toothed mating portion 136 can be provided on the outer ring sidewall 122. Alternatively, the toothed mating portion 136 can also be provided on the inner ring sidewall 112. The toothed portion 135 can also be provided on the outer ring sidewall 122. The toothed portion 135 and the toothed mating portion 136 can mesh with each other. In other words, the teeth or grooves of the toothed portion 135 and the teeth or grooves of the toothed mating portion 136 mesh with each other. For example, the toothed portion 135 may include a plurality of first teeth 1351, with a first tooth groove 1352 formed between every two first teeth 1351. The tooth-matching portion 136 may include a plurality of second teeth 1361, with a second tooth groove 1362 formed between every two second teeth 1361. When the toothed portion 135 and the tooth-matching portion 136 are engaged, the first teeth 1351 may be inserted into the second tooth groove 1362, and the second teeth 1361 may be inserted into the first tooth groove 1352. In this way, the cooperation between the toothed portion 135 and the tooth-matching portion 136 provides a high load-bearing capacity, ensuring not only the axial stability of the flow guide 120 and the connector 110, but also the radial stability of the two, thereby enabling the flow guide 120 to rotate circumferentially relative to the connector 110.

[0052] In some embodiments, when the tooth-shaped portion 135 and the tooth-matching portion 136 can be engaged with each other, a gap can be left between the two, ensuring that the guide member 120 will not interfere with the connecting member 110 during rotation. A labyrinth seal is formed at the joint between the tooth-shaped portion 135 and the tooth-matching portion 136, and the medium will generate resistance when passing through, thereby achieving the purpose of preventing gas leakage. That is to say, a series of intercepting gaps and expansion cavities are formed between the teeth, and the sealed medium produces a throttling effect when passing through the gap similar to a tortuous maze, thereby achieving the purpose of preventing leakage.

[0053] Furthermore, a small amount of lubricant may be added into the gap between the tooth-shaped portion 135 and the tooth-matching portion 136 to further reduce the friction between the flow guide 120 and the connecting member 110 .

[0054] See also Figure 4 、 Figure 6 、 Figure 11 and Figure 12The guide member 120 may include an annular body 123 and a plurality of guide structures 124. The annular body 123 may have a guide surface 1231. A plurality of guide structures 124 may be provided on the guide surface 1231, and the plurality of guide structures 124 may be arranged at intervals along the circumference of the annular body 123. In this way, when the air guide ring assembly 10 is applied to the fan assembly 1, an airflow rotating toward the inside of the fan assembly 1 may be generated by the guide structure 124, thereby improving the uniformity of the airflow. The airflow has a certain tangential velocity, so that when the airflow enters the airflow channel 121, it has a movement trend close to the rotation direction of the impeller 20, and has a smaller tangential velocity difference relative to the blades, thereby weakening the airflow separation in the airflow channel 121, optimizing the airflow flow in the airflow channel 121, and solving the problem of noise generated by vortex impact due to uneven airflow in the airflow channel 121. When applied to a range hood, the air intake efficiency of the entire machine can be improved.

[0055] Specifically, the flow guide 120 and the flow guide surface 1231 can be an integrated structure, with the flow guide 120 protruding from the flow guide surface 1231. This saves assembly time and improves the user experience. The flow guide 120 and the flow guide surface 1231 can also be separate structures. The flow guide 120 can be attached to the flow guide surface 1231 by gluing or screwing. This facilitates cleaning or maintenance of a single flow guide 120, reducing maintenance costs.

[0056] See also Figure 5 、 Figure 7 and Figure 13 The annular body 123 may include an arcuate segment 1232. The airflow channel 121 may be enclosed by the arcuate segment 1232, and the airflow channel 121 may gradually decrease in the air intake direction. In this way, the air flow rate entering the airflow channel 121 gradually increases, further enhancing the diversion effect and improving the air intake efficiency.

[0057] See also Figure 6 、 Figure 7 、 Figure 12 and Figure 13 Multiple latches 125 can be connected to the arc segment 1232. The latches 125 and the air guide structure 124 can be located on opposite sides of the arc segment 1232. This prevents the latches 125 from causing uneven airflow in the airflow channel 121. Furthermore, when the air guide ring assembly 10 is applied to the fan assembly 1, the air guide 120 is easily connected to the impeller 20, ensuring a stable connection between the air guide 120 and the impeller 20.

[0058] Specifically, the latch portion 125 and the arcuate segment 1232 can be integrally formed, with the latch portion 125 protruding from the arcuate segment 1232. This reduces assembly time and enhances the user experience. The latch portion 125 and the arcuate segment 1232 can also be separate structures. The latch portion 125 can be attached to the arcuate segment 1232 using adhesive or screws. This facilitates cleaning or maintenance of the individual latch portions 125, reducing maintenance costs.

[0059] Again, refer to Figure 6 、 Figure 7 、 Figure 12 and Figure 13 Multiple latching portions 125 can be spaced apart along the circumference of the annular body 123. Preferably, there are four latching portions 125. Of course, the number of latching portions 125 can also be three, five, or six. This further improves the stability of the connection between the deflector 120 and the impeller 20 when the air guide ring assembly 10 is applied to the fan assembly 1.

[0060] Again, refer to Figure 6 、 Figure 7 、 Figure 12 and Figure 13 The latch portion 125 can be arc-shaped in the circumferential direction of the annular body 123, and the central angle α subtended by the latch portion 125 can be between 45° and 60°, for example, 45°, 50°, or 60°. This ensures the strength of the latch portion 125 and facilitates fabrication. When the air guide ring assembly 10 is applied to the fan assembly 1, the stability of the connection between the air guide member 120 and the impeller 20 is guaranteed.

[0061] See also Figure 6 and Figure 12 The arcuate segment 1232 may have a distal end 1232a. The annular body 123 may have a straight segment 1233. The straight segment 1233 may be connected to the distal end 1232a to form the outer annular sidewall 122. In this manner, the flow guide 120 not only has a simple structure, but also facilitates the formation of the airflow channel 121 and the installation of the partial matching structure 130.

[0062] See also Figure 4 and Figure 11The air guide structure 124 can be curved along the rotation direction of the annular body 123, for example, in an arc shape. Thus, when the air guide ring assembly 10 is applied to the fan assembly 1, an airflow can be generated that rotates along the annular body toward the interior of the fan assembly 1, improving the uniformity of the airflow. The airflow has a certain tangential velocity, which makes the airflow closer to the rotation direction of the impeller 20 when entering the airflow channel 121. This further reduces the tangential velocity difference relative to the blades, thereby further optimizing the airflow in the airflow channel 121 and solving the problem of vortex impact and noise generated by uneven airflow in the airflow channel 121. When applied to a range hood, the air intake efficiency of the entire machine can be improved.

[0063] In some embodiments, when applied to the fan assembly 1, the curvature of the guide structure 124 can be the same as the curvature of the blades in the impeller 20. In this way, the airflow generated by the guide structure 124 can rotate and move toward the inside of the fan assembly 1, so that the airflow enters the airflow channel 121 with a movement trend closer to the rotation direction of the impeller 20, further reducing the tangential velocity difference relative to the blades, thereby further optimizing the airflow flow in the airflow channel 121 and solving problems such as uneven airflow in the airflow channel 121 causing vortex impact and noise generation.

[0064] Again, refer to Figure 4 and Figure 11 The guide structure 124 can gradually decrease in size from the outer ring 1234 of the annular body 123 to the inner ring 1235 of the annular body 123, for example, in a "tadpole" shape. This can accelerate the airflow around the annular body 123 to enter the airflow channel 121, thereby improving the guiding and rectifying effects.

[0065] In some embodiments, the flow guiding structure 124 may gradually increase in size from the outer ring 1234 of the annular body 123 to the inner ring 1235 of the annular body 123. Alternatively, the flow guiding structure 124 may remain unchanged from the outer ring 1234 of the annular body 123 to the inner ring 1235 of the annular body 123. Both of these methods can accelerate the flow around the annular body 123 into the airflow channel 121.

[0066] According to another aspect of the present invention, a fan assembly 1 is provided. Figure 1 、 Figure 2 、 Figure 8 and Figure 9, the fan assembly 1 may include an impeller 20, a volute 30 and the air guide ring assembly 10 as described above. The connecting member 110 may be connected to the volute 30 via the connecting portion 113. The air guide member 120 may be connected to the impeller 20. In this way, when the impeller 20 rotates, the air guide member 120 may be driven to rotate at the same time, thereby ensuring that the air guide member 120 is rotatable in the circumferential direction relative to the connecting member 110. Since the air guide ring assembly 10 as described above has the above-mentioned beneficial effects, the fan assembly 1 including the air guide ring assembly 10 as described above also has the above-mentioned beneficial effects, which will not be described in detail here.

[0067] Furthermore, the volute 30 may have a fixing portion, and the connecting portion 113 may be parallel to the fixing portion to facilitate connection between the two. Specifically, a plurality of first fixing holes 1131 are provided on the connecting portion 113 at intervals along the inner ring sidewall 112 in the circumferential direction, and a plurality of second fixing holes are provided at corresponding positions on the fixing portion. Fasteners such as screws and bolts are sequentially inserted through the first fixing holes 1131 and the second fixing holes to connect the connecting member 110 to the volute 30. Of course, the connecting member 110 and the volute 30 can also be connected by gluing, snap-fit ​​connection, or other methods.

[0068] See also Figure 1 、 Figure 2 、 Figure 8 、 Figure 9 and Figure 15, the impeller 20 may have a connection disk 210. A flanging portion 211 may be formed on the connection disk 210. The flanging portion 211 may extend out from the edge of the connection disk 210. The flanging portion 211 may be in an inverted "L" shape. Of course, the flanging portion 211 may also be in a "work" shape or a "匚" shape, etc. A clamping and mating portion 212 may be provided on the flanging portion 211. A clamping portion 125 may be provided on the flow guiding member 120, and the clamping portion 125 and the clamping and mating portion 212 may be clamped together. Optionally, the clamping portion 125 may be a single-sided clamping hook, and the clamping and mating portion 212 may be a clamping groove. The clamping hook may have a certain elasticity so that the clamping hook can pass through the clamping groove and be clamped with the clamping groove. Optionally, the clamping portion 125 may be a single-sided "U" - shaped buckle, and the clamping and mating portion 212 may be a clamping groove. The "U" - shaped buckle may have a certain elasticity, and one side of the "U" - shaped buckle can pass through the clamping groove and fix the flanging portion 211 through the cooperation of both sides. In an embodiment not shown in the figure, the clamping portion 125 may be a double - sided clamping hook, and the clamping and mating portion 212 may be a clamping groove. The clamping hook may have a certain elasticity so that both clamping hooks on both sides can pass through the clamping groove and be clamped with the clamping groove. Or, the clamping portion 125 may be a double - sided "U" - shaped buckle, and the clamping and mating portion 212 may be a clamping groove. The "U" - shaped buckle may have a certain elasticity, and one side of both "U" - shaped buckles on both sides can pass through the clamping groove and fix the flanging portion 211 through the cooperation of both sides. The above - mentioned several clamping portions 125 and clamping and mating portions 212 can be disassembled only under a certain acting force, and this acting force can be greater than the acting force generated by the shaking of the impeller 20. In this way, no other tools are needed for installation and disassembly, improving the user experience. Thus, not only the stability of the connection between the impeller 20 and the flow guiding member 120 is ensured, but also the installation or disassembly is convenient, facilitating cleaning or maintenance. In addition, the flow guiding member 120 and the connection disk 210 are connected together by means of pasting, screw connection or welding, etc.

[0069] It should be noted that multiple clamping portions 125 and multiple clamping and mating portions 212 can be respectively and correspondingly clamped. The multiple clamping and mating portions 212 may be arranged at intervals along the circumferential direction of the annular body 123. The number of the clamping and mating portions 212 may be the same as the number of the clamping portions 125. For example, the number of the clamping and mating portions 212 corresponding to the number of the clamping portions 125 may be three, four, five or six, etc. The clamping and mating portions 212 may be in an arc shape in the circumferential direction of the annular body 123, and the central angle β corresponding to the clamping and mating portions 212 may be 45° - 60°, for example, the central angle β may be 45°, 50° or 60°, etc. In this way, it is convenient for the clamping portion 125 to be clamped with the clamping and mating portion 212, further improving the stability of the connection between the flow guiding member 120 and the impeller 20.

[0070] Furthermore, in an air intake assembly with single-sided air intake, the connecting disc 210 can be the upper or lower disc of the impeller 20. In an air intake assembly with double-sided air intake, the connecting disc 210 can be the upper and lower discs of the impeller 20. It is understood that the upper and lower discs of the impeller 20 can be annular disc bodies connected to the ends of the blades. This can be applied to various fan assemblies 1, improving the air intake efficiency of the fan assembly 1.

[0071] According to another aspect of the present invention, a range hood is provided. The range hood may include a housing and the fan assembly 1 described above. The fan assembly 1 may be disposed within the housing. Since the fan assembly 1 described above has the aforementioned beneficial effects, a range hood including the fan assembly 1 also has the aforementioned beneficial effects, which will not be further elaborated herein.

[0072] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front", "back", "up", "down", "left", "right", "horizontal", "vertical", "vertical", "horizontal", "top", "bottom", etc. are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside" and "outside" refer to the inside and outside relative to the outline of each component itself.

[0073] For ease of description, area-relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the regional positional relationship between one or more components or features shown in the figures and other components or features. It should be understood that area-relative terms include not only the orientation of the components as described in the figures, but also different orientations in use or operation. For example, if the components in the drawings are inverted as a whole, the situation where the components are "above other components or features" or "above other components or features" will include the situation where the components are "below other components or structures" or "below other components or structures". Thus, the exemplary term "above" may include both the orientations "above" and "below". In addition, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this document is intended to include all of these situations.

[0074] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, parts, components and / or combinations thereof.

[0075] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0076] The present invention has been described through the above-described embodiments. However, it should be understood that the above-described embodiments are for illustrative and illustrative purposes only and are not intended to limit the present invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments and that various variations and modifications may be made based on the teachings of the present invention, all of which fall within the scope of the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An air guide ring assembly, characterized in that: include: A connecting member, wherein the connecting member encloses a receiving area and has a connecting portion on the periphery of the receiving area; and a flow guide member, the flow guide member being annular and defining an air flow channel; Wherein, the flow guide is at least partially located in the accommodating area and is rotatable in the circumferential direction relative to the connecting portion.

2. The air guide ring assembly according to claim 1, characterized in that: The connecting member has an inner ring side wall, the flow guide member has an outer ring side wall, and the inner ring side wall is rotatably connected to the outer ring side wall through a matching structure.

3. The air guide ring assembly according to claim 2, characterized in that: The mating structure includes a first groove, a second groove and a spherical part, one of the first groove and the second groove is arranged on the inner ring side wall, the other of the first groove and the second groove is arranged on the outer ring side wall, the second groove and the first groove are combined to form an accommodating cavity, and the spherical part is arranged in the accommodating cavity.

4. The air guide ring assembly according to claim 2, characterized in that: The mating structure includes a tooth-shaped portion and a tooth mating portion, one of which is arranged on the inner ring side wall, and the other is arranged on the outer ring side wall, and the tooth-shaped portion is meshed with the tooth mating portion.

5. The air guide ring assembly according to any one of claims 1 to 4, characterized in that: The flow guide comprises: an annular body having a flow-guiding surface; and A plurality of flow-guiding structures are provided on the flow-guiding surface, and the plurality of flow-guiding structures are spaced apart along the circumference of the annular body.

6. The air guide ring assembly according to claim 5, characterized in that: The annular body has an arc segment, the air flow channel is formed by enclosing the arc segment, and the air flow channel gradually decreases in the air inlet direction.

7. The air guide ring assembly according to claim 6, characterized in that: A plurality of latch parts are connected to the arc segment, and the latch parts and the flow guide structure are respectively located on two opposite sides of the arc segment.

8. The air guide ring assembly according to claim 7, characterized in that: A plurality of the latching portions are arranged at intervals along the circumference of the annular body.

9. The air guide ring assembly according to claim 8, characterized in that: The latch portion is in an arc shape in the circumferential direction of the annular body, and the central angle of the latch portion is 45° to 60°.

10. The air guide ring assembly according to claim 6, characterized in that: The arc segment has a distal end, and the annular body has a straight segment connected to the distal end to form an outer annular side wall.

11. The air guide ring assembly according to claim 5, characterized in that: The flow-guiding structure is bent along the rotation direction of the annular body.

12. The air guide ring assembly according to claim 11, characterized in that: The flow guide structure gradually decreases from the outer ring of the annular body to the inner ring of the annular body.

13. A fan assembly, characterized in that: It comprises an impeller, a volute and an air guide ring assembly as described in any one of claims 1 to 12, wherein the connecting member is connected to the volute through the connecting portion, and the guide member is connected to the impeller.

14. The fan assembly according to claim 13, characterized in that The impeller has a connecting disk, a flange portion is formed on the connecting disk, and a latch fitting portion is provided on the flange portion; The flow guide is provided with a latch portion, which is latched with the latch matching portion.

15. A range hood, characterized in that: The invention comprises a machine body and a fan assembly according to any one of claims 13 to 14, wherein the fan assembly is arranged in the machine body.

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