CN111946669A - Fan structure and lampblack absorber - Google Patents

Abstract

The invention provides a fan structure and a range hood, and relates to the technical field of kitchen utensils. The fan structure includes a flow guide assembly and a volute; the flow guide assembly includes a first flow guide and a second flow guide, and along the circumferential direction of the volute, the first flow guide and the second flow guide are installed at intervals in the volute On both sides of the lowest point of the bottom of the volute, and the interval increases gradually from the side close to the volute to the side far from the volute in the height direction of the volute; the first air guide and the second air guide both have For the two air-guiding side walls arranged at intervals, the distance between the top edges of any group of the two air-guiding side walls arranged at intervals is greater than the interval between the bottom edges. The invention relieves that the deflector in the fan structure in the prior art is fixed on the casing of the fan structure through fasteners, which will affect the appearance of the casing of the fan structure, and the volute only passes between the top of the fan structure and the top of the fan structure casing. The fasteners are fixed inside the casing of the fan structure, resulting in a technical problem of poor installation stability of the volute.

Description

Fan structure and range hood

technical field

The invention relates to the technical field of kitchenware, in particular to a fan structure and a range hood.

Background technique

With the continuous upgrading of technology, the environmental noise is getting higher and higher, and it is necessary to continuously upgrade the technology of the range hood. On the one hand, the air volume of the range hood is increased, and the noise generated by the fan structure of the range hood is reduced on the basis of increasing the air volume.

The noise at the fan structure mainly comes from the volute in the fan structure. When the oil fume enters the casing of the fan structure from the fume collecting hood under the fan structure, it will first hit the volute installed in the casing in the vertical direction. on the bottom, and then flow to the air inlets on both sides of the volute. When the oil fume flows from the bottom of the volute to the air inlet, the collision between the air flow and the air flow is serious, which will lead to a larger noise.

An existing method for reducing the noise at the volute is to install a strip-shaped deflector with a downwardly protruding curved surface inside the casing of the fan structure at a position below the volute. The curved surface can divide the oil fume, thereby reducing the collision between the airflow and the air flow during the flow of the oil fume, and reducing the noise at the volute.

However, the above-mentioned deflector is usually fixed on the casing of the fan structure through fasteners such as screws, which will affect the aesthetics of the casing of the fan structure. In addition, the volute in the existing fan structure is only fixed inside the casing of the fan structure by fasteners such as screws between the top of the volute and the top of the casing of the fan structure, resulting in poor installation stability of the volute.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a fan structure and a range hood, in order to alleviate the noise at the volute in the fan structure of the range hood existing in the prior art, the bottom of the volute is provided with a bar-shaped fan with downward protruding The deflector has a curved surface, but the deflector is fixed on the casing of the fan structure through fasteners such as screws, which will affect the appearance of the casing of the fan structure, and the volute in the existing fan structure is only through its Fasteners such as screws between the top and the top of the casing of the fan structure are fixed inside the casing of the fan structure, resulting in a technical problem of poor installation stability of the volute.

The fan structure provided by the present invention includes a volute, a flow guide assembly and a chassis;

Both the volute and the guide assembly are installed inside the case, and the top of the volute is connected to the inner side of the top of the case;

One side of the air guide assembly is connected to the bottom of the volute, and the other side of the air guide assembly is used to connect with the top of the fume collecting hood connected under the chassis;

The air guide assembly is used for dividing and guiding the air flow from the fume collecting hood to the lower part of the volute to the air inlets on both sides of the volute.

Further, the flow guide assembly includes a first flow guide member and a second flow guide member, and along the circumferential direction of the volute, the first flow guide member and the second flow guide member are installed at intervals on the Both sides of the lowest point of the bottom of the volute;

Both the first air guide member and the second air guide member have two guide side walls arranged at intervals, and the guide side walls include a top edge and a bottom edge. The spacing between the top edges of the guide side walls is greater than the spacing between the bottom edges.

Further, the end surface of the first air guide member close to the second air guide member is an inclined surface, and the inclined surface is from a side close to the bottom of the volute to a side away from the bottom of the volute, and is directed away from the bottom of the volute. the direction of the second deflector is inclined;

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 from the side close to the bottom of the volute to the side away from the bottom of the volute, and toward the side away from the first flow guide. The direction of a deflector is inclined.

Further, the first air guide is groove-shaped, the first air guide includes two first side plates, and the two first side plates are respectively located on two guides of the first air guide. at the side wall of the flow, 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;

The second air guide is slot-shaped, and the second air guide includes two second side plates, and the two second side plates are respectively located on the two air guide side walls of the second air guide. 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.

Further, the plate surface of the first side plate and the plate surface of the second side plate are both arc surfaces;

In 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; among the two second side plates, any one of the The plate surface of the second side plate protrudes in a direction away from the other second side plate.

Further, the first air guide further includes a first bottom plate and two first end plates;

The first bottom plate is connected between the two first side plates, the two first end plates are respectively located at two ends of the first air guide, and one of the first end plates connected with the first side plate and the first bottom plate, and the other first end plate is connected with the first side plate and the first bottom plate;

And/or, the second air guide further includes a second bottom plate and two second end plates;

The second bottom plate is connected between the two second side plates, the two second end plates are respectively located at two ends of the second air guide, and one of the second end plates It is connected with the second side plate and the second bottom plate, and the other second end plate is connected with the second side plate and the second bottom plate.

Further, the air guide assembly further includes a curved connecting plate;

The curved connecting plate is smoothly connected between the first air guide and the second air guide, and the curved connecting plate is attached to the bottom of the volute.

Further, the bottom of the volute is provided with a connecting rib extending along the circumferential direction of the volute;

The curved connecting plate is provided with strip-shaped holes corresponding to the connecting ribs, and the connecting ribs are fitted in the strip-shaped holes.

Further, an oil leakage hole is provided on the curved connecting plate.

The range hood provided by the present invention includes the fan structure described in any one of the above technical solutions.

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

The fan structure provided by the invention includes a volute, a guide assembly and a case; the volute and the guide assembly are installed inside the case, and the top of the volute is connected to the inner side of the top of the case; one side of the guide assembly is connected to the bottom of the volute Connection, the other side of the air guide assembly is used to connect with the top of the fume hood connected under the chassis; the air guide assembly is used to divert the air flowing from the fume hood to the bottom of the volute and guide it to the inlets on both sides of the volute. at the vent. In the fan structure provided by the present invention, one side of the air guide assembly is connected to the bottom of the volute, and the other side of the air guide assembly is used to connect with the top of the fume collecting hood connected under the chassis, so the air guide assembly can use The connection relationship between it and the volute, and the connection relationship between it and the fume collecting hood are fixed inside the case. Therefore, the position of the air guide assembly is fixed, and it is not necessary to form a connection relationship with the chassis, so that the appearance of the chassis can be prevented from being affected by the installation of the air guide assembly inside the chassis. In addition, the air guide assembly in the fan structure provided by the present invention can divide the air flow from the fume collecting hood to the lower part of the volute and guide it to the air inlets on both sides of the volute. The bottom, but in the height direction of the chassis, flows to the gap between the side wall of the volute with the air inlet and the inner side wall of the chassis, so as to reduce the collision between the airflow and the airflow, and guide the airflow smoothly. Reduce noise. In addition, 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 guide assembly is connected between the bottom of the volute and the top of the fume collecting hood, so the volute can also be supported by the guide assembly. , the volute can be stably fixed inside the chassis under the cooperation of the guide assembly and the chassis, and its installation stability has been improved.

Compared with the prior art, the air guide assembly in the fan structure provided by the present invention can be fixed inside the case by using the connection relationship between it and the volute, and the connection relationship between it and the fume collecting hood. A connection relationship is formed with the chassis, thereby improving the aesthetics of the chassis. In addition, the volute can also be supported by the air guide assembly, which can be stably fixed inside the case under the cooperation of the air guide assembly and the case, thereby improving the installation stability of the volute.

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 effect as the above-mentioned fan structure.

Description of drawings

In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the accompanying drawings required in the description of the specific embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative efforts.

1 is a schematic structural diagram of a fan structure and a fume collecting hood of a range hood provided in Embodiment 1 of the present invention;

Fig. 2 is the bottom view of the fan structure and the fume collecting hood in Fig. 1;

3 is a cross-sectional view of the fan structure and the fume collecting hood in FIG. 1;

Figure 4 is a side perspective view of the fan structure and the fume collecting hood in Figure 1;

5 is a schematic structural diagram of a flow guide assembly in the fan structure in FIG. 1;

Fig. 6 is the front view of the guide assembly in Fig. 5;

Fig. 7 is the bottom view of the guide assembly in Fig. 5;

Figure 8 is a side view of the flow guide assembly in Figure 5;

FIG. 9 is another schematic structural diagram of the flow guide assembly provided in Embodiment 1 of the present invention;

FIG. 10 is another structural schematic diagram of the fan structure and the fume collecting hood in FIG. 1 .

Icons: 1-volute; 10-connecting rib; 2-flow guide assembly; 20-first flow guide; 200-first side plate; 201-first bottom plate; 202-first end plate; 21-second 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 ways

The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example 1:

As shown in FIGS. 1-4 , the fan structure provided in this embodiment includes a volute 1 , a flow guide assembly 2 and a chassis 3 . Both the volute 1 and the guide assembly 2 are installed inside the case 3, and the top of the volute 1 is connected to the inner side of the top of the case 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 connected. The side is used to connect with the top of the fume collecting hood 4 connected under the chassis 3; the guide assembly 2 is used to divide the airflow from the fume collecting hood 4 to the bottom of the volute 1 and guide it to the air inlets on both sides of the volute 1 .

Because in the fan structure provided in this embodiment, one side of the air guide assembly 2 is connected to the bottom of the volute 1, and the other side of the air guide assembly 2 is used to connect with the top of the smoke collecting hood 4 connected under the chassis 3, Therefore, the air guide assembly 2 can be fixed inside the casing 3 by using the connection relationship between it and the volute 1 and the connection relationship between it and the fume collecting hood 4 . Therefore, the position of the air guide assembly 2 is fixed, and it does not need to form a connection relationship with the case 3 , so that the appearance of the case 3 can be prevented from being affected by the installation of the air guide assembly 2 inside the case 3 .

The bottom of the case 3 is provided with a port, the case 3 is installed on the top of the fume collecting hood 4 of the range hood, and the bottom port of the case 3 communicates with the top port of the fume collecting hood 4 . The air guide assembly 2 is located above the opening at the top of the fume collecting hood 4 and is connected to the top of the fume collecting hood 4 .

In addition, the air guide assembly 2 in the fan structure provided in this embodiment can divide the airflow flowing from the fume collecting 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 vertically piled. The machine reaches the bottom of the volute 1, but in the height direction of the case 3, it flows to the gap between the side wall of the volute 1 with the air inlet and the inner side wall of the case 3, so as to reduce the air flow between the air flow and the air flow. The collision phenomenon, the airflow is guided smoothly, and the noise is reduced.

In addition, 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 assembly 2 is connected between the bottom of the volute 1 and the top of the fume collecting hood 4, so the volute 1 also The support of the air guide assembly 2 can be obtained, and the volute 1 can be stably fixed inside the case 3 under the cooperation of the air guide assembly 2 and the case 3, and its installation stability is improved.

Compared with the prior art, the air guide assembly 2 in the fan structure provided in this embodiment can be fixed on the chassis by using the connection relationship between it and the volute 1 and the connection relationship between it and the fume collecting hood 4 . Inside 3, there is no need to form a connection relationship with the chassis 3, so that the aesthetics of the chassis 3 can be improved. In addition, the volute 1 can also be supported by the guide assembly 2 , which can be stably fixed inside the casing 3 under the cooperation of the guide assembly 2 and the casing 3 , thereby improving the installation stability of the volute 1 .

It can be seen that the fan structure provided in this embodiment alleviates the noise existing in the prior art at the volute in the fan structure of the range hood, and the bottom of the volute is provided with a strip-shaped fan with a downwardly protruding curved surface. The deflector is fixed on the casing of the fan structure through fasteners such as screws, which will affect the appearance of the casing of the fan structure, and the volute in the existing fan structure is only connected to the fan through its top. Fasteners such as screws between the tops of the structural casings are fixed inside the casing of the fan structure, resulting in a technical problem of poor installation stability of the volute.

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 guide assembly 2, and the connection between the guide assembly 2 and the fume collecting hood 4 can all be welded by welding It can also be realized by means of fasteners such as screws or rivets. In order to facilitate the installation and disassembly of the volute 1 and the flow guide assembly 2, in this embodiment, the above-mentioned connection is preferably realized by fasteners such as screws or rivets.

As shown in FIG. 1 , FIG. 2 and FIG. 5 , the flow guide assembly 2 includes a first flow guide member 20 and a second flow guide member 21 , and along the annular direction of the volute 1 , the first flow guide member 20 and the second flow guide member 21 Pieces 21 are installed on both sides of the lowest point of the bottom of the volute 1 at intervals. As shown in FIG. 5 , FIG. 7 and FIG. 8 , the first air guide member 20 and the second air guide member 21 each have two air guide side walls arranged at intervals, and the air guide side walls include a top edge and a bottom edge. The distance between the top edges of the two guide side walls arranged at intervals is greater than the distance between the bottom edges.

The top edge of the above-mentioned guide side wall is the side close to the bottom of the volute 1, the top edge of the guide side wall can be attached to the bottom of the volute 1, and the bottom edge of the guide side wall is away from the bottom of the volute 1. side.

Among them, the arrows in Figures 1, 2, 4, 7 and 8 represent the airflow from the bottom of the volute 1 to the air inlets on both sides of the volute 1, at the bottom of the volute 1 and the guide assembly 2 It can be seen that the first air guide member 20 and the second air guide member 21 can use the two air guide side walls arranged at intervals of their own to prevent the flow from the bottom of the volute 1 to the two sides of the volute 1. The airflow at the air inlet is divided, and the divided air can be guided to the air inlets on both sides of the volute 1 respectively. Therefore, the first air guide member 20 and the second air guide member 21 can reduce the collision between the air flow and the air flow during the flow of oil fume, and reduce the noise at the volute 1. The air guide assembly 2 in the fan structure provided in this embodiment is still It can play a role in reducing the noise at the volute 1.

Wherein, any group of two flow-guiding sidewalls arranged at intervals may be arranged symmetrically. And when the distance between the top edges of any set of two air-guiding sidewalls arranged at intervals is greater than the interval between the bottom edges, the air-guiding sidewalls may be curved surfaces or inclined surfaces. When the guide side wall is a curved surface, each guide side wall in any group of two guide side walls arranged 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 inclined, each guide side wall in any group of two guide side walls arranged at intervals is inclined from the top edge to the bottom edge toward the direction close to the other guide side wall.

In this embodiment, the interval between the first air guide 20 and the second air guide 21 has a height and a length, the height is in the same direction as the height direction of the volute 1 , and the length direction is in the same direction as the circumferential direction of the volute 1 . The projection direction on the horizontal plane is the same. Further, along the height direction of the above-mentioned interval, the length of the interval between the first air guide 20 and the second air guide 21 gradually increases from the side close to the volute 1 to the side far from the volute 1 .

In addition, as shown in FIGS. 2 and 3 , since the first air guide 20 and the second air guide 21 are installed on both sides of the lowest point of the bottom of the volute 1 at intervals, the airflow flows from the bottom of the volute 1 to the volute 1 When the air inlets on both sides are installed, the air flow will enter the above interval.

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 face of the first air guide 20 close to the second air guide 21, and , the end face of the second air guide 21 close to the first air guide 20 will guide the airflow entering the above-mentioned interval, so that the airflow is divided into two different directions along the circumferential direction of the volute 1 there. The two airflows move toward the end of the first air guide 20 away from the second air guide 21 and flow toward the end of the second air guide 21 away from the first air guide 20 respectively. , so that a large amount of airflow can be driven to distribute at the first air guide member 20 and the second air guide member 21 , and the airflow can be accelerated, thereby increasing the air volume of the range hood. In addition, when the air flow is divided into two air flows in different directions flowing along the annular direction of the volute 1 at the above-mentioned interval, the collision between the air flow and the air flow can also be reduced, the air flow can be guided smoothly, and the noise can be reduced.

Therefore, the fan structure provided in this embodiment utilizes the first air guide member 20 and the second air guide member 21 which are installed on both sides of the lowest point of the bottom of the volute 1 at intervals in the air guide assembly 2 , which can reduce the height of the volute 1 . At the same time, the air flow rate can be increased by increasing the interval from the side close to the volute 1 to the side far from the volute 1 in the height direction of the volute 1, thereby increasing the air volume of the range hood.

Wherein, the first air guide member 20 and the second air guide member 21 in the air guide assembly 2 installed at intervals at the bottom of the volute 1 are approximately hump-shaped, and correspondingly, the air guide assembly 2 is a hump-like air guide assembly 2 . It can be seen that, while ensuring the noise reduction effect, the imitation hump guide assembly 2 can use the height direction of the volute 1 to gradually increase from the side close to the volute 1 to the side far from the volute 1 to enhance the airflow. flow rate, thereby increasing the air volume of the range hood.

As shown in FIG. 1 , FIG. 5 , FIG. 6 and FIG. 7 , the end surface of the first air guide 20 close to the second air guide 21 is an inclined surface, and the inclined surface is from the side close to the bottom of the volute 1 to the side away from the volute One side of the bottom of 1 is inclined toward the direction away from the second air guide 21 . The end surface of the second air guide 21 close to the first air guide 20 is an inclined surface, and the inclined surface is from the side close to the bottom of the volute 1 to the side far away from the bottom of the volute 1 toward the side away from the first air guide 20 slanted direction.

The end surface of the first air guide member 20 close to the second air guide member 21 is an inclined surface, and the end surface of the second air guide member 21 close to the first air guide member 20 is an inclined surface. Quickly and smoothly divide the airflow into two airflows flowing along the annular direction of the volute, which can effectively drive the airflow to speed up.

As shown in FIG. 5 , the first air guide 20 is groove-shaped, and the first air guide 20 includes two first side plates 200 , and the two first side plates 200 are respectively located on two guides of the first air guide 20 . At the side wall of the flow, 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 air guide 21 is groove-shaped, the second air guide 21 includes two second side plates 210 , and the two second side plates 210 are located at the two air guide side walls of the second air guide 21 respectively, 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.

In practical applications, both the first air guide member 20 and the second air guide member 21 may be solid structures or both may be hollow structures. Compared with the solid structure, the hollow structure is lighter in weight, thereby making the overall weight of the fan structure lighter. Therefore, in this embodiment, preferably, the first air guide 20 and the second air guide 21 are both groove-shaped.

The first side plate 200 is used to form two air-guiding side walls of the first air-guiding member 20 arranged at intervals, and the second side plate 210 is used to form two air-guiding side walls of the second air guiding member 21 that are arranged at intervals.

As shown in FIG. 6 , in order to enable the first air guide member 20 and the second air guide member 21 to be stably installed at the bottom of the volute 1 , the first side plate 200 and the second side plate 210 are close to the bottom of the volute 1 . The sides can be arcs corresponding to the shape of the bottom of the volute 1, and the arcs make the sides of the first side plate 200 and the second side plate 210 close to the bottom of the volute 1 fit on the volute. Bottom of Shell 1.

Further, as shown in FIG. 8 , the plate surface of the first side plate 200 and the plate surface of the second side plate 210 are both arc surfaces. Among 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 . Among 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 .

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.

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 arc surfaces, they can also guide the divided airflow, so that the divided airflow can smoothly flow to the scroll The air inlets on both sides of the shell 1 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 arc surfaces. . The plate surface of the first side plate 200 and the plate surface of the second side plate 210 are both inclined planes, and the first air guide 20 does not include the first bottom plate 201, and the second air guide 21 does not include the second bottom plate 211, the first The one side plate 200 and the second side plate 210 may be arranged in a V shape.

Compared with the inclined surface, the arc surface has a better effect of diverting and guiding. Therefore, in this embodiment, it is preferable that the plate surface of the first side plate 200 and the plate surface of the second side plate 210 are both arc surfaces.

In order to ensure the flow guiding effect of the above-mentioned arc surface, among the two first side plates 200 , the plate surface of any one of the first side plates 200 needs to protrude in a direction away from the other first side plate 200 . Among the two second side panels 210 , the panel surface of any one of the second side panels 210 needs to protrude in a direction away from the other second side panel 210 .

As shown in FIGS. 5 , 7 and 8 , the first air guide 20 further includes a first bottom plate 201 and two first end plates 202 , or the second air guide 21 further includes a second bottom plate 211 and two first end plates 202 . The second end plate 212 . Alternatively, the first air guide 20 further includes a first bottom plate 201 and two first end plates 202 , and the second air guide 21 further includes a second bottom plate 211 and two second end plates 212 .

The first bottom plate 201 is connected between the two first side plates 200 , the two first end plates 202 are located at two ends of the first air guide 20 respectively, and one of the first end plates 202 is connected to the first end plate 202 . The side plate 200 and the first bottom plate 201 are connected, and the other first end plate 202 is connected with the first side plate 200 and the first bottom plate 201 .

The second bottom plate 211 is connected between the two second side plates 210 , the two second end plates 212 are located at two ends of the second air guide 21 respectively, and one of the second end plates 212 is connected to the second end plate 212 . The side plate 210 and the second bottom plate 211 are connected, and the other second end plate 212 is connected with the second side plate 210 and the second bottom plate 211 .

The first bottom plate 201 , the two first end plates 202 and the two first side plates 200 are connected together so that the first air guide 20 is groove-shaped, and the second bottom plate 211 and the two second end plates are connected together 212 and the two second side plates 210 make the second air guide 21 groove-shaped.

When the first air guide 20 includes a first bottom plate 201 and the second air guide 21 includes a second bottom plate 211 , both the first bottom plate 201 and the second bottom plate 211 can be installed on the smoke collector located below the fan structure in the range hood On the cover 4 , 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 .

Wherein, both the first end plate 202 and the second end plate 212 can be attached to the inner side 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 side wall of the volute 1 without the air inlet can be connected to the bottom of the volute 1 . The gaps between the inner side walls of the chassis 3 are blocked to prevent airflow from entering the gaps to generate noise, thereby improving the noise reduction effect.

In this embodiment, as shown in FIG. 9 , the first air guide member 20 and the second air guide member 21 may be provided independently of each other. As shown in FIG. 5 , FIG. 6 and FIG. 7 , the air guide assembly 2 may further include a curved connecting plate 5 . The curved connecting plate 5 is smoothly connected between the first air guide 20 and the second air guide 21 , and the curved connecting plate 5 is attached to the bottom of the volute 1 .

The curved connecting plate 5 is used to connect the first air guide 20 and the second air guide 21 together, and the curved connecting plate 5 can be connected with the bottom of the volute 1 , and the curved connecting plate 5 can improve the overall structure of the guide assembly 2 stability, and the convenience of the installation process of the first air guide 20 and the second air guide 21 can be improved.

It should be noted that, since the curved connecting plate 5 is plate-shaped and attached to the bottom of the volute 1 , the curved connecting plate 5 can still provide a space between the first air guide 20 and the second air guide 21 .

As shown in Figure 2, Figure 7 and Figure 10, the bottom of the volute 1 is provided with a connecting rib 10 extending along the circumferential direction of the volute 1, and the curved connecting plate 5 is provided with a strip hole 50 corresponding to the connecting rib 10, The connecting rib 10 is fitted in the strip hole 50 .

The connecting rib 10 fitted 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 air guide assembly 2 .

Wherein, 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 to make the end of the first air guide 20 away from the second air guide 21, and the second guide One end of the flow member 21 away from the first flow guide member 20 is located below the connecting rib 10 . At this time, a first card slot may be provided on the top edge of the first end plate 202 near the second air guide 21 , and a second card slot may be provided on the top edge of the second end plate 212 near the first air guide 20 . groove. The connecting rib 10 is fitted in the first slot, the strip hole 50 and the second slot in sequence.

When the connecting rib 10 is sequentially fitted into the first slot, the strip hole 50 and the second slot, the connecting rib 10 can further improve the connection stability between the bottom of the volute 1 and the guide assembly 2, and this The connecting ribs 10 can make the force distribution between the guide assembly 2 and the bottom of the volute 1 more uniform, so that the force at each connection between the guide assembly 2 and the volute 1 is smaller, and the flow guide assembly 2 is improved. Firmness with volute 1.

As shown in FIG. 7 , the curved connecting plate 5 is provided with an oil leakage hole 51 .

The oil leakage hole 51 allows the oil accumulated on the volute 1 to pass through the guide assembly 2 and then flow out during the flow of oil fume, so as to facilitate oil leakage from the volute 1 .

Embodiment 2:

The range hood provided in this embodiment includes the fan structure in Embodiment 1. Therefore, the range hood provided in this embodiment and the fan structure in Embodiment 1 can solve the same technical problems and achieve the same technical effect, which will not be repeated here. .

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention. scope.

Claims (10)

1. A fan structure is characterized by comprising a volute (1), a flow guide assembly (2) and a case (3);

the volute (1) and the flow guide assembly (2) are both installed inside the case (3), and the top of the volute (1) is connected with the inner side of the top of the case (3);

one side of the flow guide assembly (2) is connected with the bottom of the volute (1), and the other side of the flow guide assembly (2) is used for being connected with the top of a smoke collecting hood (4) communicated below the case (3);

the flow guide assembly (2) is used for dividing the airflow flowing to the lower part of the volute (1) from the fume collecting hood (4) and guiding the airflow to air inlets on two sides of the volute (1).

2. The fan structure according to claim 1, characterized in that the flow guide assembly (2) comprises a first flow guide (20) and a second flow guide (21);

the first flow guide part (20) and the second flow guide part (21) are arranged on two sides of the lowest point of the bottom of the volute (1) at intervals in the circumferential direction of the volute (1);

the first flow guide part (20) and the second flow guide part (21) are respectively provided with two flow guide side walls which are arranged at intervals, each flow guide side wall comprises a top edge and a bottom edge, and the distance between the top edges of any two flow guide side walls which are arranged at intervals is larger than that between the bottom edges.

3. The fan structure according to claim 2, wherein the end surface of the first flow guide member (20) close to the second flow guide member (21) is a slope, and the slope is inclined from the side close to the bottom of the scroll casing (1) to the side far from the bottom of the scroll casing (1) in the direction far from the second flow guide member (21);

the end face, close to the first flow guide part (20), of the second flow guide part (21) is an inclined face, and the inclined face inclines towards the direction far away from the first flow guide part (20) from the side close to the bottom of the volute (1) to the side far away from the bottom of the volute (1).

4. The fan structure according to claim 2, wherein the first air guiding member (20) is groove-shaped, the first air guiding member (20) comprises two first side plates (200), the two first side plates (200) are respectively located at two air guiding side walls of the first air guiding member (20), 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 part (21) is groove-shaped, the second flow guide part (21) comprises two second side plates (210), the two second side plates (210) are respectively located on two flow guide side walls of the second flow guide part (21), 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 with each other.

5. The fan structure according to claim 4, wherein the plate surface of the first side plate (200) and the plate surface of the second side plate (210) are both cambered surfaces;

the plate surface of any one first side plate (200) of the two first side plates (200) protrudes towards the direction far away from the other first side plate (200); the plate surface of any one of the two second side plates (210) protrudes in a direction away from the other second side plate (210).

6. The fan structure according to claim 4, 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 positioned at the two ends of the first air guide piece (20), one of the first end plates (202) is connected with the first side plates (200) and the first bottom plate (201), and the other first end plate (202) is connected with the first side plates (200) and the first bottom plate (201);

and/or the second flow guide piece (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), the two second end plates (212) are respectively located at two ends of the second flow guide piece (21), one of the second end plates (212) is connected with the second side plates (210) and the second bottom plate (211), and the other one of the second end plates (212) is connected with the second side plates (210) and the second bottom plate (211).

7. The fan structure according to any of claims 2-6, characterized in that the flow guiding assembly (2) further comprises a curved connection plate (5);

the curved surface connecting plate (5) is connected between the end parts of the first flow guide part (20) and the second flow guide part (21) which are close to each other in a smooth transition mode, and the curved surface connecting plate (5) is attached to the bottom of the volute (1).

8. The fan structure according to claim 7, 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 connecting plate (5) is provided with a strip-shaped hole (50) corresponding to the connecting rib (10), and the connecting rib (10) is embedded in the strip-shaped hole (50).

9. The fan structure according to claim 7, characterized in that the curved connecting plate (5) is provided with oil leakage holes (51).

10. A range hood, characterized in that it comprises a fan structure according to any one of claims 1 to 9.

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