Fan structure and range hood

Abstract

The present invention provides a fan structure and a range hood, and relates to the technical field of kitchenware. The fan structure includes a guide assembly and a volute; the guide assembly includes a first guide member and a second guide member, and along the circumferential direction of the volute, the first guide member and the second guide member are installed at intervals on both sides of the lowest point of the bottom of the volute, and the interval gradually increases from the side close to the volute to the side away from the volute in the height direction of the volute; the first guide member and the second guide member each have two guide side walls arranged at intervals, and the spacing between the top edges of any group of two guide side walls arranged at intervals is greater than the spacing between the bottom edges. The present invention alleviates the technical problem that the guide plate in the fan structure in the prior art is fixed to the outer shell of the fan structure by fasteners, which affects the aesthetics of the outer shell of the fan structure, and the volute is fixed to the inner shell of the fan structure only by fasteners between its top and the top of the outer shell of the fan structure, resulting in poor installation stability of the volute.

Description

Technical Field

[0001] The invention relates to the technical field of kitchenware, and in particular to a fan structure and a range hood. Background Art

[0002] With the continuous upgrading of technology, the environmental noise is getting higher and higher, and it is necessary to continuously upgrade the technology of range hoods. On the one hand, the air volume of the range hood should be increased, and at the same time, the noise generated by the fan structure of the range hood should be reduced on the basis of increasing the air volume.

[0003] The noise generated at the fan structure mainly comes from the volute in the fan structure. When the oil smoke enters the outer shell of the fan structure from the smoke hood below the fan structure, it will first hit the bottom of the volute installed in the outer shell in the vertical direction, and then flow to the air inlets on both sides of the volute. When the oil smoke flows from the bottom of the volute to the air inlet, the collision between the airflows is more serious, which will cause a lot of noise.

[0004] An existing method for reducing noise at the volute is to install a strip-shaped guide plate with a downwardly protruding curved surface inside the outer shell of the fan structure, below the volute. The curved surface of the guide plate can divert the oil smoke, thereby reducing the collision between airflows during the flow of oil smoke and reducing the noise at the volute.

[0005] However, the guide plate is usually fixed to the outer shell of the fan structure by screws or other fasteners, which will affect the appearance of the outer shell of the fan structure. In addition, the volute in the existing fan structure is only fixed to the inner shell of the fan structure by screws or other fasteners between its top and the top of the fan structure outer shell, resulting in poor installation stability of the volute. Summary of the invention

[0006] An object of the present invention is to provide a fan structure and a range hood so as to alleviate the problem in the prior art that in order to reduce the noise at the volute in the fan structure of the range hood, a strip-shaped guide plate with a downwardly protruding curved surface is installed at the bottom of the volute, but the guide plate is fixed to the outer casing of the fan structure by fasteners such as screws, which will affect the appearance of the outer casing of the fan structure. In addition, the volute in the existing fan structure is fixed to the inside of the outer casing of the fan structure only by fasteners such as screws between its top and the top of the outer casing of the fan structure, resulting in a technical problem of poor installation stability of the volute.

[0007] The fan structure provided by the present invention comprises a volute, a flow guide assembly and a chassis;

[0008] The volute and the guide assembly are both installed inside the case, and the top of the volute is connected to the inner side of the top of the case;

[0009] One side of the flow guide component is connected to the bottom of the volute, and the other side of the flow guide component is used to connect to the top of the smoke collecting hood connected to the bottom of the chassis;

[0010] The flow guide assembly is used to split the airflow flowing from the smoke collecting hood to the bottom of the volute and guide it to the air inlets on both sides of the volute.

[0011] Further, the flow guide assembly includes a first flow guide member and a second flow guide member, and along the annular direction of the volute, the first flow guide member and the second flow guide member are installed at intervals on both sides of the lowest point of the bottom of the volute;

[0012] The first flow guide and the second flow guide each have two flow guide side walls spaced apart from each other, the flow guide side walls comprising a top edge and a bottom edge, and the spacing between the top edges of any group of two flow guide side walls spaced apart from each other is greater than the spacing between the bottom edges.

[0013] Further, the end surface of the first flow guide member close to the second flow guide member is an inclined surface, and the inclined surface is inclined from a side close to the bottom of the volute to a side away from the bottom of the volute, in a direction away from the second flow guide member;

[0014] The end surface of the second flow guide member close to the first flow guide member is an inclined surface, and the inclined surface is inclined from a side close to the bottom of the volute to a side away from the bottom of the volute, and is inclined toward a direction away from the first flow guide member.

[0015] Further, the first flow guide is groove-shaped, and includes two first side plates, the two first side plates are respectively located at two flow guide side walls of the first flow guide, and the top edges of the two first side plates are connected to the bottom of the volute at intervals, and the bottom edges of the two first side plates are connected to each other;

[0016] The second flow guide member is groove-shaped, and includes two second side plates, which are respectively located at two flow guide side walls of the second flow guide member, and the top edges of the two second side plates are connected to the bottom of the volute at intervals, and the bottom edges of the two second side plates are connected to each other.

[0017] Furthermore, the plate surface of the first side plate and the plate surface of the second side plate are both curved surfaces;

[0018] Of the two first side plates, the plate surface of any one of the first side plates protrudes in a direction away from the other first side plate; of the two second side plates, the plate surface of any one of the second side plates protrudes in a direction away from the other second side plate.

[0019] Furthermore, the first flow guide member further includes a first bottom plate and two first end plates;

[0020] The first bottom plate is connected between the two first side plates, the two first end plates are respectively located at the two ends of the first flow guide, and one of the first end plates is connected to the first side plate and the first bottom plate, and the other first end plate is connected to the first side plate and the first bottom plate;

[0021] And / or, the second flow guide member further includes a second bottom plate and two second end plates;

[0022] The second bottom plate is connected between the two second side plates, the two second end plates are respectively located at the two ends of the second flow guide member, and one of the second end plates is connected to the second side plate and the second bottom plate, and the other second end plate is connected to the second side plate and the second bottom plate.

[0023] Furthermore, the guide assembly also includes a curved surface connecting plate;

[0024] The curved surface connection plate is smoothly transitionally connected between the first flow guide member and the second flow guide member, and the curved surface connection plate is attached to the bottom of the volute.

[0025] Furthermore, the bottom of the volute is provided with connecting ribs extending in the circumferential direction of the volute;

[0026] The curved connecting plate is provided with strip holes corresponding to the connecting ribs, and the connecting ribs are embedded in the strip holes.

[0027] Furthermore, an oil leakage hole is provided on the curved connection plate.

[0028] The range hood provided by the present invention comprises the fan structure described in any one of the above technical solutions.

[0029] The fan structure and range hood provided by the present invention can produce the following beneficial effects:

[0030] The fan structure provided by the present invention includes a volute, a guide assembly and a chassis; the volute and the guide assembly are both installed inside the chassis, and the top of the volute is connected to the inner side of the top of the chassis; one side of the guide assembly is connected to the bottom of the volute, and the other side of the guide assembly is used to connect to the top of the smoke hood connected to the bottom of the chassis; the guide assembly is used to divert the airflow flowing from the smoke hood to the bottom of the volute and guide it to the air inlets on both sides of the volute. Since in the fan structure provided by the present invention, one side of the guide assembly is connected to the bottom of the volute, and the other side of the guide assembly is used to connect to the top of the smoke hood connected to the bottom of the chassis, the guide assembly can be fixed inside the chassis by using the connection relationship between it and the volute, and the connection relationship between it and the smoke hood. Therefore, the position of the guide assembly is fixed, and it does not need to form a connection relationship with the chassis, so that the aesthetics of the chassis can be avoided from being affected by installing the guide assembly inside the chassis. Moreover, the flow guide assembly in the fan structure provided by the present invention can divert the airflow flowing from the smoke hood to the bottom of the volute and guide it to the air inlets on both sides of the volute. At this time, the airflow will not flow vertically from the pile driver to the bottom of the volute, but will flow in the height direction of the chassis to the gap between the side wall of the volute with the air inlet and the inner wall of the chassis, thereby reducing the collision between airflows, smoothing the airflow, and reducing noise. In addition, because in the fan structure provided by the present invention, the top of the volute is connected to the inner side of the top of the chassis, and the flow guide assembly is connected between the bottom of the volute and the top of the smoke hood, the volute can also be supported by the flow guide assembly, and the volute can be stably fixed inside the chassis with the cooperation of the flow guide assembly and the chassis, and its installation stability is improved.

[0031] Compared with the prior art, the guide assembly in the fan structure provided by the present invention can be fixed inside the chassis by utilizing the connection relationship between the guide assembly and the volute, and the connection relationship between the guide assembly and the smoke hood, without forming a connection relationship with the chassis, thereby improving the aesthetics of the chassis. In addition, the volute can also be supported by the guide assembly, and can be stably fixed inside the chassis under the cooperation of the guide assembly and the chassis, thereby improving the installation stability of the volute.

[0032] The range hood provided by the present invention includes the above-mentioned fan structure, so the range hood provided by the present invention has the same beneficial effects as the above-mentioned fan structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 A schematic structural diagram of a fan structure and a fume collecting hood of a range hood provided in the first embodiment of the present invention;

[0035] Figure 2 for Figure 1 Bottom view of the fan structure and smoke hood;

[0036] Figure 3 for Figure 1 A cross-sectional view of the fan structure and the smoke hood;

[0037] Figure 4 for Figure 1 A side perspective view of the fan structure and the fume hood;

[0038] Figure 5 for Figure 1 A schematic diagram of the structure of the guide assembly in the fan structure;

[0039] Figure 6 for Figure 5 A front view of the diversion component in FIG.

[0040] Figure 7 for Figure 5 A bottom view of the guide assembly in FIG.

[0041] Figure 8 for Figure 5 A side view of the guide assembly in FIG.

[0042] Fig. 9 Another schematic diagram of the structure of the flow guide assembly provided in the first embodiment of the present invention;

[0043] Fig.10 for Figure 1 Another structural schematic diagram of the fan structure and the smoke hood.

[0044] Icons: 1-volute; 10-connecting ribs; 2-flow guide assembly; 20-first flow guide member; 200-first side plate; 201-first bottom plate; 202-first end plate; 21-second flow guide member; 210-second side plate; 211-second bottom plate; 212-second end plate; 3-chassis; 4-smoke hood; 5-curved connecting plate; 50-strip hole; 51-oil leakage hole. DETAILED DESCRIPTION

[0045] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] Embodiment 1:

[0047] like Figure 1-Figure 4 As shown, the fan structure provided in this embodiment includes a volute 1, a guide assembly 2 and a chassis 3. The volute 1 and the guide assembly 2 are both installed inside the chassis 3, and the top of the volute 1 is connected to the inner side of the top of the chassis 3; one side of the guide assembly 2 is connected to the bottom of the volute 1, and the other side of the guide assembly 2 is used to connect to the top of the smoke hood 4 connected to the bottom of the chassis 3; the guide assembly 2 is used to divert the airflow flowing from the smoke hood 4 to the bottom of the volute 1 and guide it to the air inlets on both sides of the volute 1.

[0048] Since one side of the air guide component 2 is connected to the bottom of the volute 1 in the fan structure provided in this embodiment, and the other side of the air guide component 2 is used to be connected to the top of the smoke hood 4 connected to the bottom of the chassis 3, the air guide component 2 can be fixed inside the chassis 3 by using the connection relationship between it and the volute 1 and the connection relationship between it and the smoke hood 4. Therefore, the position of the air guide component 2 is fixed, and it does not need to form a connection relationship with the chassis 3, so that the aesthetics of the chassis 3 can be avoided from being affected by installing the air guide component 2 inside the chassis 3.

[0049] The bottom of the chassis 3 is provided with a through hole, and the chassis 3 is mounted on the top of the smoke hood 4 of the range hood, and the through hole at the bottom of the chassis 3 is connected with the through hole at the top of the smoke hood 4. The flow guide assembly 2 is located above the through hole at the top of the smoke hood 4 and is connected to the top of the smoke hood 4.

[0050] In addition, the guide component 2 in the fan structure provided in this embodiment can divert the airflow flowing from the smoke hood 4 to the bottom of the volute 1 and guide it to the air inlets on both sides of the volute 1. At this time, the airflow will not be vertical to the bottom of the volute 1, but will flow in the height direction of the chassis 3 to the gap between the side wall of the volute 1 with the air inlet and the inner wall of the chassis 3, thereby reducing the collision between airflows, smoothing the airflow and reducing noise.

[0051] In addition, since in the fan structure provided in this embodiment, the top of the volute 1 is connected to the inner side of the top of the chassis 3, and the guide component 2 is connected between the bottom of the volute 1 and the top of the smoke hood 4, the volute 1 can also be supported by the guide component 2. The volute 1 can be stably fixed inside the chassis 3 with the cooperation of the guide component 2 and the chassis 3, and its installation stability is improved.

[0052] Compared with the prior art, the guide assembly 2 in the fan structure provided in this embodiment can be fixed inside the chassis 3 by utilizing the connection relationship between the guide assembly 2 and the volute 1 and the connection relationship between the guide assembly 2 and the smoke hood 4, without forming a connection relationship with the chassis 3, thereby improving the aesthetics of the chassis 3. In addition, the volute 1 can also be supported by the guide assembly 2, and can be stably fixed inside the chassis 3 under the cooperation of the guide assembly 2 and the chassis 3, thereby improving the installation stability of the volute 1.

[0053] It can be seen that the fan structure provided in the present embodiment alleviates the problem existing in the prior art that in order to reduce the noise at the volute in the fan structure of the range hood, a strip-shaped guide plate with a downwardly protruding curved surface is installed at the bottom of the volute, but the guide plate is fixed to the outer casing of the fan structure by fasteners such as screws, which will affect the appearance of the outer casing of the fan structure. In addition, the volute in the existing fan structure is fixed to the inside of the outer casing of the fan structure only by fasteners such as screws between its top and the top of the fan structure outer casing, resulting in a technical problem of poor installation stability of the volute.

[0054] In practical applications, the connection between the top of the volute 1 and the chassis 3, the connection between the bottom of the volute 1 and the air guide assembly 2, and the connection between the air guide assembly 2 and the smoke hood 4 can be achieved by welding, or by fasteners such as screws or rivets. In order to facilitate the installation and removal of the volute 1 and the air guide assembly 2, in this embodiment, it is preferred that the above connections are achieved by fasteners such as screws or rivets.

[0055] like Figure 1 , Figure 2 and Figure 5 As shown, the flow guide assembly 2 includes a first flow guide 20 and a second flow guide 21. Along the annular direction of the volute 1, the first flow guide 20 and the second flow guide 21 are installed at intervals on both sides of the lowest point of the bottom of the volute 1. Figure 5 , Figure 7 and Figure 8 As shown, the first guide member 20 and the second guide member 21 both have two guide side walls spaced apart, the guide side walls include a top edge and a bottom edge, and the spacing between the top edges of any set of two guide side walls spaced apart is greater than the spacing between the bottom edges.

[0056] The top edge of the guide side wall is the side close to the bottom of the volute 1 , and the top edge of the guide side wall can be attached to the bottom of the volute 1 , while the bottom edge of the guide side wall is the side away from the bottom of the volute 1 .

[0057] in, Figure 1 , Figure 2 , Figure 4 , Figure 7 and Figure 8The arrows in the figure represent the airflow flowing from the bottom of the volute 1 to the air inlets on both sides of the volute 1. From the flow direction at the bottom of the volute 1 and the guide assembly 2, it can be seen that the first guide 20 and the second guide 21 can use their own two guide side walls spaced apart to divert the airflow flowing from the bottom of the volute 1 to the air inlets on both sides of the volute 1, and can guide the diverted airflow to the air inlets on both sides of the volute 1. Therefore, the first guide 20 and the second guide 21 can reduce the collision between airflows during the flow of oil smoke, reduce the noise at the volute 1, and the guide assembly 2 in the fan structure provided in this embodiment can still play a role in reducing the noise at the volute 1.

[0058] Among them, any group of two guide side walls set at intervals can be set symmetrically. And when the spacing between the top edges of any group of two guide side walls set at intervals is greater than the spacing between the bottom edges, the guide side wall can be a curved surface or an inclined surface. When the guide side wall is a curved surface, each guide side wall in any group of two guide side walls set at intervals protrudes from the top edge to the bottom edge in a direction away from the other guide side wall. When the guide side wall is an inclined surface, each guide side wall in any group of two guide side walls set at intervals is inclined from the top edge to the bottom edge in a direction close to the other guide side wall.

[0059] In this embodiment, the interval between the first flow guide 20 and the second flow guide 21 has a height and a length, wherein the height is in the same direction as the height direction of the volute 1, and the length is in the same direction as the projection direction of the circumferential direction of the volute 1 on the horizontal plane. Further, along the height direction of the interval, the length of the interval between the first flow guide 20 and the second flow guide 21 gradually increases from the side close to the volute 1 to the side away from the volute 1.

[0060] In addition, if Figure 2 and Figure 3 As shown, since the first guide member 20 and the second guide member 21 are installed at intervals on both sides of the lowest point of the bottom of the volute 1, when the airflow flows from the bottom of the volute 1 to the air inlets on both sides of the volute 1, the airflow will enter the above-mentioned intervals.

[0061] Since the interval gradually increases from the side close to the volute 1 to the side far from the volute 1 in the height direction of the volute 1, the end surface of the first guide 20 close to the second guide 21 and the end surface of the second guide 21 close to the first guide 20 will guide the airflow entering the interval, so that the airflow is divided into two airflows in different directions along the annular direction of the volute 1 at this location, and the two airflows flow toward the end of the first guide 20 away from the second guide 21 and toward the end of the second guide 21 away from the first guide 20, respectively, so that the airflow can be driven to be distributed in large quantities at the first guide 20 and the second guide 21, and the airflow flow is accelerated, thereby increasing the air volume of the range hood. In addition, when the airflow is divided into two airflows in different directions flowing along the annular direction of the volute 1 at the interval, the collision phenomenon between airflows can be reduced, the airflow can be guided smoothly, and the noise can be reduced.

[0062] Therefore, the fan structure provided in this embodiment utilizes the interval in the guide assembly 2 to install the first guide member 20 and the second guide member 21 on both sides of the lowest point of the bottom of the volute 1, which can reduce the noise at the volute 1 while utilizing the gradually increasing interval from the side close to the volute 1 to the side far away from the volute 1 in the height direction of the volute 1 to increase the airflow velocity, thereby increasing the air volume of the range hood.

[0063] Among them, the first flow guide 20 and the second flow guide 21 in the flow guide assembly 2 installed at intervals at the bottom of the volute 1 are approximately hump-shaped, and correspondingly, the flow guide assembly 2 is an imitation hump flow guide assembly 2. It can be seen that the imitation hump flow guide assembly 2 can increase the airflow velocity by using the interval gradually increasing from the side close to the volute 1 to the side far away from the volute 1 in the height direction of the volute 1 while ensuring the noise reduction effect, thereby increasing the air volume of the range hood.

[0064] like Figure 1 , Figure 5 , Figure 6 and Figure 7 As shown, the end surface of the first flow guide 20 close to the second flow guide 21 is an inclined surface, and the inclined surface is inclined from the side close to the bottom of the volute 1 to the side away from the bottom of the volute 1, toward the direction away from the second flow guide 21. The end surface of the second flow guide 21 close to the first flow guide 20 is an inclined surface, and the inclined surface is inclined from the side close to the bottom of the volute 1 to the side away from the bottom of the volute 1, toward the direction away from the first flow guide 20.

[0065] The end surface of the first guide member 20 close to the second guide member 21 is an inclined surface, and the end surface of the second guide member 21 close to the first guide member 20 is an inclined surface. Compared with the case where they are curved surfaces, the airflow can be more quickly and smoothly diverted into two airflows flowing in the annular direction along the volute, thereby effectively driving the airflow to flow faster.

[0066] like Figure 5 As shown, the first flow guide 20 is groove-shaped, and the first flow guide 20 includes two first side plates 200, which are respectively located at the two flow guide side walls of the first flow guide 20, and the top edges of the two first side plates 200 are connected to the bottom of the volute 1 at intervals, and the bottom edges of the two first side plates 200 are connected to each other. The second flow guide 21 is groove-shaped, and the second flow guide 21 includes two second side plates 210, which are respectively located at the two flow guide side walls of the second flow guide 21, and the top edges of the two second side plates 210 are connected to the bottom of the volute 1 at intervals, and the bottom edges of the two second side plates 210 are connected to each other.

[0067] In practical applications, the first guide member 20 and the second guide member 21 can both be solid structures or hollow structures. Compared with the solid structure, the hollow structure is lighter, which can make the overall weight of the fan structure lighter. Therefore, in this embodiment, it is preferred that the first guide member 20 and the second guide member 21 are both groove-shaped.

[0068] The first side plate 200 is used to form two flow guide side walls of the first flow guide member 20 that are spaced apart from each other, and the second side plate 210 is used to form two flow guide side walls of the second flow guide member 21 that are spaced apart from each other.

[0069] like Figure 6 As shown, in order to enable the first guide member 20 and the second guide member 21 to be stably installed at the bottom of the volute 1, the side edges of the first side plate 200 and the second side plate 210 close to the bottom of the volute 1 can both be arc-shaped corresponding to the shape of the bottom of the volute 1, and the arc-shaped allows the side edges of the first side plate 200 and the second side plate 210 close to the bottom of the volute 1 to fit closely to the bottom of the volute 1.

[0070] Further, such as Figure 8 As shown, the plate surface of the first side plate 200 and the plate surface of the second side plate 210 are both curved surfaces. Of the two first side plates 200, the plate surface of any first side plate 200 protrudes in a direction away from the other first side plate 200. Of the two second side plates 210, the plate surface of any second side plate 210 protrudes in a direction away from the other second side plate 210.

[0071] In practical applications, the two first side plates 200 may be arranged in parallel, and the two second side plates 210 may also be arranged in parallel.

[0072] Since the plate surface of the first side plate 200 and the plate surface of the second side plate 210 are both inclined surfaces or both curved surfaces, they can also guide the airflow after diversion, so that the diverted airflow can flow smoothly to the air inlets on both sides of the volute 1, which can further reduce noise. Therefore, in order to improve the diversion and guiding effect, the plate surface of the first side plate 200 and the plate surface of the second side plate 210 can also be inclined surfaces or both curved surfaces. When the plate surface of the first side plate 200 and the plate surface of the second side plate 210 are both inclined surfaces, and the first guide member 20 does not include the first bottom plate 201, and the second guide member 21 does not include the second bottom plate 211, the first side plate 200 and the second side plate 210 can be arranged in a V shape.

[0073] Compared with an inclined surface, a curved surface has a better flow diversion and guiding effect, and therefore in this embodiment, preferably, both the plate surface of the first side plate 200 and the plate surface of the second side plate 210 are curved surfaces.

[0074] In order to ensure the above-mentioned curved surface guiding effect, the plate surface of any one of the two first side plates 200 needs to protrude in a direction away from the other first side plate 200. The plate surface of any one of the two second side plates 210 needs to protrude in a direction away from the other second side plate 210.

[0075] like Figure 5 , Figure 7 and Figure 8 As shown, the first flow guide 20 further includes a first bottom plate 201 and two first end plates 202, or the second flow guide 21 further includes a second bottom plate 211 and two second end plates 212. Alternatively, the first flow guide 20 further includes a first bottom plate 201 and two first end plates 202, and the second flow guide 21 further includes a second bottom plate 211 and two second end plates 212.

[0076] Among them, the first bottom plate 201 is connected between the two first side plates 200, and the two first end plates 202 are respectively located at the two ends of the first guide member 20, and one of the first end plates 202 is connected to the first side plate 200 and the first bottom plate 201, and the other first end plate 202 is connected to the first side plate 200 and the first bottom plate 201.

[0077] Among them, the second bottom plate 211 is connected between the two second side plates 210, and the two second end plates 212 are respectively located at the two ends of the second guide member 21, and one of the second end plates 212 is connected to the second side plate 210 and the second bottom plate 211, and the other second end plate 212 is connected to the second side plate 210 and the second bottom plate 211.

[0078] The first bottom plate 201, two first end plates 202 and two first side plates 200 connected together make the first flow guide 20 trough-shaped, and the second bottom plate 211, two second end plates 212 and two second side plates 210 connected together make the second flow guide 21 trough-shaped.

[0079] When the first air guide 20 includes a first bottom plate 201 and the second air guide 21 includes a second bottom plate 211, the first bottom plate 201 and the second bottom plate 211 can both be installed on the smoke hood 4 located below the fan structure in the range hood. At this time, the first bottom plate 201 and the second bottom plate 211 can improve the installation stability of the first air guide 20 and the second air guide 21.

[0080] The first end plate 202 and the second end plate 212 can both be attached to the inner wall of the chassis 3. At this time, the first end plate 202 and the first bottom plate 201 cooperate with each other, and the second end plate 212 and the second bottom plate 211 cooperate with each other, so that the gap between the side wall of the volute 1 without the air inlet and the inner wall of the chassis 3 can be blocked below the volute 1 to prevent the airflow from entering the above gap and generating noise, thereby improving the noise reduction effect.

[0081] In this embodiment, if Fig. 9 As shown, the first flow guide 20 and the second flow guide 21 can be arranged independently of each other. Figure 5 , Figure 6 and Figure 7 As shown, the flow guide assembly 2 may further include a curved surface connection plate 5. The curved surface connection plate 5 is smoothly connected between the first flow guide 20 and the second flow guide 21, and the curved surface connection plate 5 is attached to the bottom of the volute 1.

[0082] The curved connecting plate 5 is used to connect the first guide member 20 and the second guide member 21 together, and the curved connecting plate 5 can be connected to the bottom of the volute 1. The curved connecting plate 5 can improve the overall structural stability of the guide assembly 2, and can improve the convenience of the installation process of the first guide member 20 and the second guide member 21.

[0083] It should be noted that, since the curved connecting plate 5 is in the shape of a plate and is attached to the bottom of the volute 1 , the curved connecting plate 5 can still allow a gap to exist between the first flow guide member 20 and the second flow guide member 21 .

[0084] like Figure 2 , Figure 7 and Fig.10 As shown, the bottom of the volute 1 is provided with connecting ribs 10 extending in the circumferential direction of the volute 1 , and the curved connecting plate 5 is provided with strip holes 50 corresponding to the connecting ribs 10 , and the connecting ribs 10 are embedded in the strip holes 50 .

[0085] The connecting rib 10 embedded in the strip hole 50 can play a positioning role and can improve the connection stability between the bottom of the volute 1 and the guide assembly 2.

[0086] The connecting rib 10 can be arranged in the middle of the bottom of the volute 1, and the length of the connecting rib 10 can be long enough so that the end of the first guide member 20 away from the second guide member 21 and the end of the second guide member 21 away from the first guide member 20 are both located below the connecting rib 10. At this time, a first slot can be arranged on the top edge of the first end plate 202 close to the second guide member 21, and a second slot can be arranged on the top edge of the second end plate 212 close to the first guide member 20. The connecting rib 10 is sequentially embedded in the first slot, the strip hole 50 and the second slot.

[0087] When the connecting rib 10 is sequentially engaged in the first slot, the strip hole 50 and the second slot, the connecting rib 10 can further enhance the connection stability between the bottom of the volute 1 and the guide assembly 2, and at this time, the connecting rib 10 can make the force distribution between the guide assembly 2 and the bottom of the volute 1 more uniform, thereby making the stress on each connection between the guide assembly 2 and the volute 1 smaller, thereby enhancing the firmness between the guide assembly 2 and the volute 1.

[0088] like Figure 7 As shown, an oil leakage hole 51 is provided on the curved connecting plate 5 .

[0089] The oil leakage hole 51 allows the oil accumulated on the volute 1 to flow out through the guide assembly 2 during the flow of oil smoke, thereby facilitating the oil leakage of the volute 1 .

[0090] Embodiment 2:

[0091] The range hood provided in this embodiment includes the fan structure in the first embodiment. Therefore, the range hood provided in this embodiment and the fan structure in the first embodiment can solve the same technical problems and achieve the same technical effects, which will not be described in detail here.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fan structure, characterized in that: It comprises a volute (1), a flow guide assembly (2) and a casing (3); The volute (1) and the flow guide assembly (2) are both installed inside the casing (3), and the top of the volute (1) is connected to the inner side of the top of the casing (3); One side of the flow guide component (2) is connected to the bottom of the volute (1), and the other side of the flow guide component (2) is used to be connected to the top of a smoke collecting hood (4) connected to the bottom of the chassis (3); The flow guide component (2) is used to split the airflow flowing from the smoke collecting hood (4) to the bottom of the volute (1) and guide it to the air inlets on both sides of the volute (1); The flow guide assembly (2) comprises a first flow guide member (20) and a second flow guide member (21); Along the circumferential direction of the volute (1), the first flow guide member (20) and the second flow guide member (21) are installed at intervals on both sides of the lowest point of the bottom of the volute (1); The first flow guide (20) and the second flow guide (21) both have two flow guide side walls spaced apart from each other, the flow guide side walls comprising a top edge and a bottom edge, and the spacing between the top edges of any set of two flow guide side walls spaced apart from each other is greater than the spacing between the bottom edges.

2. The fan structure according to claim 1, characterized in that: The end surface of the first flow guide member (20) close to the second flow guide member (21) is an inclined surface, and the inclined surface is inclined from a side close to the bottom of the volute (1) to a side away from the bottom of the volute (1), in a direction away from the second flow guide member (21); The end surface of the second flow guide member (21) close to the first flow guide member (20) is an inclined surface, and the inclined surface is inclined from a side close to the bottom of the volute (1) to a side away from the bottom of the volute (1), in a direction away from the first flow guide member (20).

3. The fan structure according to claim 1, characterized in that: The first flow guide (20) is groove-shaped, and comprises two first side plates (200), the two first side plates (200) are respectively located at two flow guide side walls of the first flow guide (20), and the top edges of the two first side plates (200) are connected to the bottom of the volute (1) at intervals, and the bottom edges of the two first side plates (200) are connected to each other; The second flow guide member (21) is groove-shaped, and comprises two second side plates (210), the two second side plates (210) being respectively located at two flow guide side walls of the second flow guide member (21), and the top edges of the two second side plates (210) are connected to the bottom of the volute (1) at intervals, and the bottom edges of the two second side plates (210) are connected to each other.

4. The fan structure according to claim 3, characterized in that: The plate surface of the first side plate (200) and the plate surface of the second side plate (210) are both curved surfaces; Of the two first side plates (200), the plate surface of any one of the first side plates (200) protrudes in a direction away from the other first side plate (200); and of the two second side plates (210), the plate surface of any one of the second side plates (210) protrudes in a direction away from the other second side plate (210).

5. The fan structure according to claim 3, characterized in that: The first flow guide (20) further comprises a first bottom plate (201) and two first end plates (202); The first bottom plate (201) is connected between the two first side plates (200), the two first end plates (202) are respectively located at two ends of the first flow guide (20), and one of the first end plates (202) is connected to the first side plate (200) and the first bottom plate (201), and the other first end plate (202) is connected to the first side plate (200) and the first bottom plate (201); And / or, the second flow guide member (21) further comprises a second bottom plate (211) and two second end plates (212); The second bottom plate (211) is connected between the two second side plates (210), and the two second end plates (212) are respectively located at two ends of the second flow guide member (21), and one of the second end plates (212) is connected to the second side plate (210) and the second bottom plate (211), and the other second end plate (212) is connected to the second side plate (210) and the second bottom plate (211).

6. The fan structure according to any one of claims 1 to 5, characterized in that: The flow guide assembly (2) further comprises a curved surface connection plate (5); The curved surface connection plate (5) is smoothly transitionally connected between the ends of the first flow guide member (20) and the second flow guide member (21) that are close to each other, and the curved surface connection plate (5) is fitted on the bottom of the volute (1).

7. The fan structure according to claim 6, characterized in that: The bottom of the volute (1) is provided with a connecting rib (10) extending in the circumferential direction of the volute (1); The curved surface connection plate (5) is provided with a strip-shaped hole (50) corresponding to the connection rib (10), and the connection rib (10) is embedded in the strip-shaped hole (50).

8. The fan structure according to claim 6, characterized in that: The curved surface connection plate (5) is provided with an oil leakage hole (51).

9. A range hood, characterized in that: The range hood comprises the fan structure according to any one of claims 1-8.

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