CN213392859U - Fan and lampblack absorber - Google Patents

Abstract

The utility model provides a fan and lampblack absorber, wherein, the fan includes: the volute is provided with an air inlet; the impeller is arranged in the volute and corresponds to the air inlet; the air inlet grille is arranged at the air inlet and comprises a first guide plate and a second guide plate, the first guide plate and the second guide plate are arranged at the air inlet, the second guide plate inclines towards the direction far away from the first guide plate along the axis of the impeller and from the impeller to the direction of the air inlet. The direction that first guide plate and second guide plate led the air current is different, and the second guide plate is difficult for producing the resistance to the flow of air current, and the air current can flow into the spiral case along the second guide plate in, reduces the produced noise of air current impact second guide plate.

Description

Fan and lampblack absorber

Technical Field

The utility model belongs to the technical field of domestic appliance, particularly, relate to a fan and a lampblack absorber.

Background

The air inlet of the fan needs to be provided with a fan cover, however, the collision between the inlet air flow and the fan cover can generate noise, and the use experience of a user is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art or the correlation technique.

In view of this, the utility model discloses a first aspect provides a fan, include: the volute is provided with an air inlet; the impeller is arranged in the volute and corresponds to the air inlet; the air inlet grille is arranged at the air inlet and comprises a first guide plate and a second guide plate, the air inlet is arranged at the air inlet, the second guide plate inclines towards the direction far away from the first guide plate along the axis of the impeller and from the impeller to the direction of the air inlet.

The utility model provides a fan includes: the impeller is installed in the volute and can pump gas into the volute through an air inlet of the volute and discharge the gas out of the volute through an air outlet of the volute. The impeller corresponds to the air inlet, namely the axis of the impeller can penetrate through the air inlet, so that the impeller can drive the airflow at the air inlet, the airflow flows into the volute, and the airflow can be quickly pumped into the volute without increasing the rotating speed of the impeller. The air-inlet grille is arranged at the air inlet and comprises a first guide plate and a second guide plate, the air inlet can be partially shielded by the first guide plate and the second guide plate, impurities are prevented from entering the volute to influence the operation of the impeller, and the air flow can be guided by the first guide plate and the second guide plate, so that the air flow stably flows into the volute. The second baffle is disposed obliquely relative to the first baffle. Specifically, the second guide plate is inclined to the direction away from the first guide plate in the extending direction of the axis of the impeller from the impeller to the air inlet, so that the guide directions of the first guide plate and the second guide plate to the air flow are different, and therefore, the guide directions of the first guide plate and the second guide plate to the air flow are different because the air inlet direction of the air flow is different at the air inlet, for example, the air inlet is divided into two parts along the radial direction, the air flow of the first part flows into the volute along the direction perpendicular to the air inlet, and the air flow of the second part flows into the volute substantially perpendicular to the air flow of the first part. If the guide plates are all parallel to the axis of the impeller, or the guide plates are all perpendicular to the radial section of the air inlet, the guide plates can obstruct the flow of the second part of air flow, and the second part of air flow collides with the guide plates to generate noise. Therefore the utility model discloses in with the second guide plate to the direction slope of keeping away from first guide plate, can make first guide plate can lead to above-mentioned first part air current, the extending direction of first guide plate is the same basically with the flow direction of first part air current promptly, the second guide plate is the same basically with the flow direction of second part air current, the second guide plate is difficult for producing the resistance to the flow of air current, the second part air current can be along in the second guide plate inflow spiral case, reduce the air current and strike the produced noise of second guide plate. And, if the flow resistance of guide plate to the air current is great, just need improve the rotational speed of impeller in order to improve the air current flow speed, when impeller rotational speed improves, produce the vortex in the spiral case easily, the existence of vortex can produce great noise, and the utility model discloses well second guide plate can lead to the second part air current, reduces the flow resistance to the air current, and the rotational speed that need not improve the impeller just can make the air current flow into in the spiral case fast, avoids forming a large amount of vortexes in the spiral case, further reduces because the noise that vortex phenomenon produced.

Additionally, according to the utility model provides an above-mentioned technical scheme's fan can also have following additional technical feature:

in a possible design, the width direction of the first guide plate is set from the side of the first guide plate located in the volute to the side of the first guide plate located outside the volute; the width direction of the second guide plate is set from one side of the second guide plate positioned in the volute to one side of the second guide plate positioned outside the volute; the included angle between a straight line L1 in the width direction of the first guide plate and the axis of the impeller is more than 0 degree and less than or equal to 5 degrees; an angle between a straight line L2 in the width direction of the second baffle and the axis of the impeller is greater than or equal to 45 degrees and less than 90 degrees.

In the design, the included angle between the straight line of the first guide plate in the width direction and the straight line of the second guide plate in the width direction relative to the axis of the impeller is specifically defined, because the flow direction of the first part of airflow is substantially perpendicular to the radial section of the air inlet, the included angle between the straight line L1 and the axis of the impeller is defined to be in the range of 0-5 degrees, the extending direction of the first guide plate is substantially the same as the flow direction of the first part of airflow, and therefore the flow resistance of the first guide plate to the first part of airflow is small. The direction of the second portion of the airflow is substantially perpendicular to the direction of the first portion of the airflow, or the direction of the second portion of the airflow is inclined with respect to the direction of the first portion of the airflow, so that the angle between the straight line L2 and the axis of the impeller is between 45 degrees and 90 degrees, so that the second baffle extends in substantially the same direction as the second portion of the airflow and has less resistance to the second portion of the airflow. The air current flows along first guide plate and second guide plate to reduce the impact of air current to first guide plate and second guide plate, and then reduce the noise that the fan during operation produced.

In one possible design, the first baffle is parallel to the axis of the impeller in the width direction of the first baffle.

In the design, the flow direction of the first part of the airflow is basically vertical to the radial section of the air inlet, and the first guide plate is limited to be parallel to the axis of the impeller, so that the flow direction of the first part of the airflow is basically parallel to the first guide plate, and the resistance of the first guide plate to the first part of the airflow is reduced.

In one possible design, the wind turbine further comprises: the first air inlet channel is formed between two adjacent first guide plates in the plurality of first guide plates; and a plurality of second air inlet channels are formed between two adjacent second guide plates in the plurality of second guide plates.

In this design, first guide plate and second guide plate are a plurality ofly, a plurality of first guide plates can divide into a plurality of first inlet air channel with the first part of air intake, a plurality of second guide plates can divide into a plurality of second inlet air channel with the second part of air intake, specifically, form first inlet air channel between two adjacent first guide plates in a plurality of first guide plates, form second inlet air channel between two adjacent second guide plates in a plurality of second guide plates, through forming a plurality of inlet air channel, thereby can shunt the air current, make stranded air current guided to in the casing, avoid forming the vortex phenomenon at the air intake, avoid forming the vortex and produce the noise.

In one possible design, the first baffle and the second baffle are each configured as an arc-shaped structure; the plurality of first deflectors and the plurality of second deflectors are coaxially arranged.

In this design, the shape of first guide plate and second guide plate has specifically been prescribed a limit, first guide plate and second guide plate all are constructed as the arc structure and the axis of a plurality of first guide plates and a plurality of second guide plate is same axis, so a plurality of first guide plates are concentric ring structure, a plurality of second guide plates are likewise concentric ring structure, the through-flow cross-section of air intake is usually circular, set up a plurality of first guide plates and second guide plate into the arc structure and make first guide plate and second guide plate and the shape adaptation of air intake to make the outward appearance of fan more pleasing to the eye.

In one possible design, the wind turbine further comprises: the first end of the first connecting rib is connected with the volute, and the first connecting rib is connected with the plurality of first guide plates so as to divide the first air inlet channel into a plurality of first sub air inlet channels; and the first end of the second connecting rib is connected with the volute, and the second connecting rib is connected with the plurality of second guide plates so as to divide the second air inlet channel into a plurality of second sub air inlet channels.

In this design, the fan still includes first splice bar and second splice bar, a plurality of first guide plates are connected to first splice bar, do not need to install a plurality of first guide plates in the spiral case respectively promptly, but connect the relative position that a plurality of first guide plates just can inject a plurality of first guide plates through first splice bar, then connect the first end of first splice bar in the spiral case, just realized the installation and the fixing to first guide plate, specifically, first splice bar is along the radial extension of first guide plate, so first splice bar can separate first inlet air passageway for a plurality of first inlet sub-passageways, through the quantity that increases inlet air passageway, can separate the air current for more stranded air current, reduce the through-flow cross sectional area of every inlet air passageway, further reduce the possibility that the vortex produced.

Similarly, need not install a plurality of second guide plates in the spiral case respectively, but connect a plurality of second guide plates through the second splice bar and just can inject the relative position of a plurality of second guide plates, then connect the first end of second splice bar in the spiral case, just realized the installation and fixed to the second guide plate, concretely, the second splice bar is along the radial extension of second guide plate, so the second splice bar can be separated second air inlet channel for a plurality of second air inlet sub-channels, through increasing the quantity of air inlet channel, can separate the air current for more stranded air current, reduce the through-flow cross-sectional area of every air inlet channel, further reduce the possibility that the vortex produced.

In one possible design, the wind turbine further comprises: the connecting portion is arranged on the volute and connected with the first end of the first connecting rib and the first end of the second connecting rib.

In this design, first splice bar and second splice bar can be one or be a plurality ofly in the utility model discloses in, first splice bar and second splice bar are a plurality ofly, and a plurality of first splice bar set up along the circumference interval of first guide plate, and a plurality of second splice bars set up along the circumference interval of second guide plate, and a plurality of first splice bars can improve the structural stability of a plurality of first guide plates, when having the air current to flow, the relative position of a plurality of first guide plates is difficult for taking place to change, and then can shelter from in air intake department steadily. Similarly, a plurality of second splice bars can improve the structural stability of a plurality of second guide plates, avoid a plurality of second guide plates to receive the impact of air current and take place to rock, effectively reduce the spoilage of first guide plate and second guide plate.

The first guide plate, the second guide plate, the first connecting rib, the second connecting rib and the connecting part form a fan cover.

The second end that the second end of a plurality of first splice bars is fixed in connecting portion and a plurality of second splice bars also is fixed in connecting portion, is fixed in the installation department the spiral case and just can realize the installation to the fan casing, need not be fixed in the spiral case respectively with every first splice bar and need not be fixed in the spiral case respectively with every second splice bar, improves the installation convenience to the fan casing, reduces installation procedure.

In one possible design, the connection part is detachably connected to the volute.

In this design, specifically limited the connected mode of connecting portion and spiral case, connecting portion can dismouting in the spiral case, can be with connecting portion and spiral case machine-shaping respectively, then assemble connecting portion in the spiral case again, are favorable to reducing the processing degree of difficulty, improve machining efficiency. When first guide plate, second guide plate, first splice bar and second splice bar take place to damage or need to be changed, can dismantle connecting portion in the spiral case to improve the convenience of maintenance process. Specifically, can set up the pilot hole on connecting portion, the corresponding screw hole that is provided with on the spiral case uses the bolt to pass pilot hole threaded connection in screw hole again to lock connecting portion in the spiral case, the mode of screw assembly is favorable to improving the dismouting convenience to connecting portion.

In one possible design, the connection portion includes: the first connecting part is connected to the first end of the first connecting rib; the second connecting portion is connected to the second end of the second connecting rib, and the first connecting portion and the second connecting portion can be assembled on the volute respectively.

In this design, connecting portion include first connecting portion and second connecting portion, and a plurality of first splice bars are connected in first connecting portion, and a plurality of second splice bars are connected in the second splice bar to can set up first connecting portion and second connecting portion into the components of a whole that can function independently structure. Because the structure of first guide plate and second guide plate is different, with fan housing integrated into one piece, so can divide into the cover body first cover body and the second cover body, first cover body includes: first guide plate, first connecting rib and first connecting portion, the second cover body includes: the first cover body and the second cover body are respectively machined and formed to improve machining convenience, and then the first cover body and the second cover body are respectively assembled on the volute to realize the installation of the cover body.

In one possible design, the wind turbine further comprises: the positioning part is arranged on the volute; the positioning groove is arranged on the connecting part, and the positioning part can be contained in the positioning groove.

In this design, location portion can play the positioning action to the installation of fan housing, specifically, can set up the mounting hole on connecting portion, the corresponding screw hole that sets up on the spiral case, then threaded connection in the screw hole again through wearing enough mounting hole, realize the installation to the fan housing, at the in-process with bolted connection screw hole, need the staff to align mounting hole and screw hole, through setting up location portion on the spiral case in this application, in the constant head tank with location portion embedding connecting portion, just realized the location to the fan housing, the mounting hole aligns the screw hole this moment, do not need staff's manual alignment, improve assembling process's convenience.

In one possible design, the axis of rotation of the impeller extends in a horizontal direction; the first guide plate is parallel to the rotating shaft of the impeller; along the plumb line direction, the second guide plate is located the below of first guide plate.

In this design, the upper airflow approaches the horizontal direction and flows into the volute, so the first guide plate is arranged parallel to the rotation axis of the impeller, i.e. the first guide plate extends along the horizontal direction to guide the upper airflow. The flow direction of the lower air flow tends to be vertical to the flow direction of the upper air flow, so that the second guide plate is arranged below the first guide plate, and the second guide plate guides the lower air flow.

The utility model discloses a second aspect provides a lampblack absorber, include: as the fan in above-mentioned arbitrary possible design, consequently the utility model provides a lampblack absorber has the whole benefits of the fan that provides in the above-mentioned arbitrary possible design.

The range hood further comprises a shell, and the fan is installed in the shell.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 shows a schematic structural diagram of a fan according to an embodiment of the present invention;

fig. 2 shows a schematic structural diagram of a fan according to another embodiment of the present invention;

fig. 3 shows a schematic structural diagram of a fan according to a further embodiment of the present invention;

FIG. 4 shows a simulated view of a three-dimensional flow field within a wind turbine;

FIG. 5 shows a simulation of a two-dimensional flow field within a wind turbine;

FIG. 6 shows a simulation of a local two-dimensional flow field within a wind turbine.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 6 is:

100 volute, 200 impeller, 300 first guide plate, 310 first air inlet channel, 400 second guide plate, 410 second air inlet channel, 500 first connecting rib, 600 second connecting rib, 700 connecting part, 710 first connecting part and 720 second connecting part.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

A wind turbine provided according to some embodiments of the present invention is described below with reference to fig. 1 to 6.

The first embodiment is as follows:

as shown in fig. 1, an embodiment of the first aspect of the present invention provides a fan, including: the air inlet grille comprises a first guide plate 300 and a second guide plate 400, the volute 100 is provided with an air inlet, the impeller 200 is arranged in the volute 100, and the impeller 200 corresponds to the air inlet; the first baffle 300 and the second baffle 400 are disposed at the air inlet, and the second baffle 400 is inclined towards the direction far away from the first baffle 300 along the axis of the impeller 200 and from the impeller 200 to the air inlet.

The impeller 200 is installed in the volute 100, and the impeller 200 can draw gas into the volute 100 through an air inlet of the volute 100 and discharge the gas out of the volute 100 through an air outlet of the volute 100. The impeller 200 corresponds to the air inlet, that is, the axis of the impeller 200 can pass through the air inlet, so that the impeller 200 can drive the airflow at the air inlet, the airflow flows into the volute 100, and the airflow can be quickly drawn into the volute 100 without increasing the rotation speed of the impeller 200. The air-inlet grille is arranged at the air inlet and comprises a first guide plate 300 and a second guide plate 400, the first guide plate 300 and the second guide plate 400 can partially shield the air inlet, so that sundries are prevented from entering the volute 100 to influence the operation of the impeller 200, and the first guide plate 300 and the second guide plate 400 can guide the airflow so that the airflow stably flows into the volute 100. The second baffle 400 is disposed obliquely with respect to the first baffle 300. Specifically, the second guide plate 400 is inclined away from the first guide plate 300 in the extending direction of the axis of the impeller 200 from the impeller 200 to the air inlet, so that the first guide plate 300 and the second guide plate 400 guide the airflow differently, and therefore the first guide plate 300 and the second guide plate 400 are arranged to guide the airflow differently because the airflow enters the air inlet differently, for example, the air inlet is divided into two parts along the radial direction, the first part of the airflow flows into the scroll casing 100 along the direction perpendicular to the air inlet, and the second part of the airflow flows into the scroll casing 100 along the direction substantially perpendicular to the first part of the airflow. If the baffles are parallel to the axis of the impeller 200 or perpendicular to the radial cross-section of the air inlet, the baffles will obstruct the flow of the second portion of the air flow, and the second portion of the air flow will impact the baffles and generate noise. Therefore, the utility model discloses with second guide plate 400 to the direction slope of keeping away from first guide plate 300, can make first guide plate 300 can lead to above-mentioned first part air current, the extending direction of first guide plate 300 is the same basically with the flow direction of first part air current promptly, second guide plate 400 is the same basically with the flow direction of second part air current, second guide plate 400 is difficult to produce the resistance to the flow of air current, second part air current can flow in spiral case 100 along second guide plate 400, reduce the air current and strike the produced noise of second guide plate 400. Moreover, if the flow resistance of guide plate to the air current is great, just need improve impeller 200's rotational speed in order to improve the air current flow speed, when impeller 200 rotational speed improves, produce the vortex in spiral case 100 easily, the existence of vortex can produce great noise, and the utility model provides a second guide plate 400 can lead to the second part air current, reduces the flow resistance to the air current, in the rotational speed that need not improve impeller 200 just can make the air current flow in spiral case 100 fast, avoids forming a large amount of vortexes in spiral case 100, further reduces because the noise that the vortex phenomenon produced.

Specifically, the second baffle 400 is lower than the first baffle 300 in the direction of the vertical line.

Fluid dynamics simulation (CFD) is performed on the whole range hood, fig. 3, 4 and 5 are fluid dynamics simulation diagrams, and it can be known from the simulation diagrams that at the top of the air inlet of the fan, the airflow of the block L1 in fig. 6 enters the fan substantially vertically in a direction close to 90 degrees, and the airflow at the lower side, the block L2 in fig. 6, first goes parallel to the fan and then enters the fan at a certain angle.

The position is different about the design of screen panel structure, and above-mentioned position, wind can get into perpendicularly, position below, and the air current entry direction is basically with above-mentioned position one-tenth 90 degrees angles, and this accords with the characteristic in flow field in figure 6, consequently the utility model provides a screen panel structure has less flow resistance to current scheme is difficult to because the air current produces the noise to the impact of guide plate relatively.

As shown in fig. 1 and fig. 6, further, the width direction of the first flow guide plate 300 is set from the side of the first flow guide plate 300 inside the scroll casing 100 to the side of the first flow guide plate 300 outside the scroll casing 100; the width direction of the second guide plate 400 is set from the side of the second guide plate 400 inside the scroll casing 100 to the side of the second guide plate 400 outside the scroll casing 100; an included angle between a straight line L1 in the width direction of the first flow guide plate 300 and the axis of the impeller 200 is greater than 0 degree and less than or equal to 5 degrees; an angle between a straight line L2 in the width direction of the second baffle 400 and the axis of the impeller 200 is greater than or equal to 45 degrees and less than 90 degrees.

Specifically, the included angle between the straight line of the first flow guiding plate 300 in the width direction and the straight line of the second flow guiding plate 400 in the width direction with respect to the axis of the impeller 200 is defined, since the flow direction of the first part of the airflow is substantially perpendicular to the radial cross section of the air inlet, the included angle between the straight line L1 and the axis of the impeller 200 is defined to be in the range of 0 degree to 5 degrees, and the extending direction of the first flow guiding plate 300 is substantially the same as the flow direction of the first part of the airflow, so that the flow resistance of the first flow guiding plate 300 to the first part of the airflow is small. The flow direction of the second portion of the airflow is substantially perpendicular to the flow direction of the first portion of the airflow, or the flow direction of the second portion of the airflow is inclined with respect to the flow direction of the first portion of the airflow, so that the included angle between the straight line L2 and the axis of the impeller 200 ranges between 45 degrees and 90 degrees, so that the extending direction of the second baffle 400 is substantially the same as the flow direction of the second portion of the airflow, and the flow resistance of the second baffle 400 to the second portion of the airflow is small. The air flow flows along the first and second guide plates 300 and 400, so that the impact of the air flow on the first and second guide plates 300 and 400 is reduced, and the noise generated when the fan operates is reduced.

Further, the first baffle 300 is parallel to the axis of the impeller 200 in the width direction of the first baffle 300.

Since the flow direction of the first portion of the airflow is substantially perpendicular to the radial cross section of the air inlet, the first baffle 300 is defined parallel to the axis of the impeller 200, so that the flow direction of the first portion of the airflow is substantially parallel to the first baffle 300, thereby reducing the resistance of the first baffle 300 to the first portion of the airflow.

As shown in fig. 1, further, the fan further includes: the first air inlet channel 310 and the second air inlet channel 410, the first baffle 300 is a plurality, and the first air inlet channel 310 is formed between two adjacent first baffles 300 in the plurality of first baffles 300. The number of the second baffles 400 is plural, and a second air intake passage 410 is formed between two adjacent second baffles 400 among the plural second baffles 400.

The first guide plates 300 and the second guide plates 400 are multiple, the first portions of the air inlets can be divided into multiple first air inlet channels 310 by the multiple first guide plates 300, the second portions of the air inlets can be divided into multiple second air inlet channels 410 by the multiple second guide plates 400, specifically, the first air inlet channels 310 are formed between two adjacent first guide plates 300 in the multiple first guide plates 300, the second air inlet channels 410 are formed between two adjacent second guide plates 400 in the multiple second guide plates 400, and by forming the multiple air inlet channels, the air flow can be divided, so that multiple air flows are guided into the volute 100, the vortex phenomenon at the air inlets is avoided, and the noise caused by the vortex is avoided.

Example two:

referring to fig. 1 and 2, in the first embodiment, the first baffle 300 and the second baffle 400 are both configured as an arc-shaped structure; the plurality of first baffles 300 and the plurality of second baffles 400 are coaxially arranged.

In this embodiment, the shape of the first baffle 300 and the second baffle 400 is specifically defined, the first baffle 300 and the second baffle 400 are both configured in an arc structure, and the axes of the first baffles 300 and the second baffles 400 are the same axis, so that the first baffles 300 are in a concentric ring structure, the second baffles 400 are also in a concentric ring structure, the flow cross section of the air inlet is generally circular, and the first baffles 300 and the second baffles 400 are configured in an arc structure to match the shape of the first baffles 300 and the second baffles 400 with the shape of the air inlet, thereby making the appearance of the fan more beautiful.

It can be understood that the included angle between the first baffle 300 and the second baffle 400 and the axis of the impeller 200 refers to the deflection angle between the first baffle 300 and the second baffle 400 relative to the axis of the impeller 200, for example, based on the first baffle 300 and the second baffle 400 being parallel to the axis of the impeller 200, the deflection angle between the first baffle 300 and the axis of the impeller 200 is the included angle between the first baffle 300 and the axis of the impeller 200. The angle of deflection of the second baffle 400 relative to the axis of the impeller 200 is the angle between the second baffle 400 and the axis of the impeller 200. Or, the orthographic projection of the axis of the impeller 200 on the first guide plate 300 is recorded as a first reference line, the orthographic projection of the axis of the impeller 200 on the second guide plate 400 is recorded as a second reference line, the included angle between the axis of the impeller 200 and the first reference line is the included angle between the axis of the impeller 200 and the first guide plate 300, and the included angle between the axis of the impeller 200 and the second reference line is the included angle between the axis of the impeller 200 and the second guide plate 400.

As shown in fig. 1 and fig. 2, further, the blower further includes: the first end of the first connecting rib 500 is connected to the volute 100, and the first connecting rib 500 is connected to the plurality of first flow deflectors 300 to divide the first air inlet channel 310 into a plurality of first sub air inlet channels; the first end of the second connection rib 600 is connected to the scroll casing 100, and the second connection rib 600 is connected to the plurality of second guide plates 400 to divide the second air inlet passage 410 into a plurality of second sub air inlet passages.

The first connecting rib 500 is connected with the plurality of first guide plates 300, that is, the plurality of first guide plates 300 do not need to be installed on the volute 100, but the first connecting rib 500 is connected with the plurality of first guide plates 300 to limit the relative positions of the plurality of first guide plates 300, and then the first end of the first connecting rib 500 is connected with the volute 100, so that the first guide plates 300 can be installed and fixed, specifically, the first connecting rib 500 extends along the radial direction of the first guide plates 300, so that the first connecting rib 500 can separate the first air inlet channel 310 into a plurality of first air inlet sub-channels, and by increasing the number of the air inlet channels, the air flow can be separated into a plurality of air flows, the through-flow cross-sectional area of each air inlet channel is reduced, and the possibility of vortex generation is further reduced.

Similarly, the second guide plates 400 do not need to be installed on the scroll casing 100, but the second guide plates 400 are connected by the second connection ribs 600 to define the relative positions of the second guide plates 400, and then the first ends of the second connection ribs 600 are connected to the scroll casing 100, so that the second guide plates 400 can be installed and fixed, specifically, the second connection ribs 600 extend along the radial direction of the second guide plates 400, so that the second connection ribs 600 can divide the second air inlet channel 410 into a plurality of second air inlet sub-channels, and by increasing the number of the air inlet channels, the air flow can be divided into a plurality of air flows, the flow cross-sectional area of each air inlet channel is reduced, and the possibility of vortex generation is further reduced.

Example three:

with reference to fig. 1, fig. 2 and fig. 3, on the basis of the above embodiment, the fan further includes a connection portion 700, the connection portion 700 is disposed on the volute casing 100, and the connection portion 700 connects the first end of the first connection rib 500 and the first end of the second connection rib 600.

In this embodiment, first splice bar 500 and second splice bar 600 can be one or be a plurality of, in the utility model discloses in, first splice bar 500 and second splice bar 600 are a plurality ofly, and a plurality of first splice bar 500 set up along the circumference interval of first guide plate 300, a plurality of second splice bar 600 set up along the circumference interval of second guide plate 400, a plurality of first splice bar 500 can improve the structural stability of a plurality of first guide plates 300, when having the air current to flow, the relative position of a plurality of first guide plates 300 is difficult for changing, and then can shelter from in air intake department steadily. Similarly, a plurality of second splice bars 600 can improve the structural stability of a plurality of second guide plates 400, avoid a plurality of second guide plates 400 to receive the impact of air current and take place to rock, effectively reduce the spoilage of first guide plate 300 and second guide plate 400.

The first air guide plate 300, the second air guide plate 400, the first connection rib 500, the second connection rib 600 and the connection part 700 constitute an air hood.

The second ends of the first connecting ribs 500 are fixed to the connecting portion 700, the second ends of the second connecting ribs 600 are also fixed to the connecting portion 700, the connecting portion 700 is fixed to the volute 100, the wind cowl can be mounted, each first connecting rib 500 does not need to be fixed to the volute 100 and each second connecting rib 600 does not need to be fixed to the volute 100, mounting convenience of the wind cowl is improved, and mounting procedures are reduced.

Further, the connection part 700 is detachably connected to the volute 100, specifically, the connection mode of the connection part 700 and the volute 100 is limited, the connection part 700 can be disassembled and assembled on the volute 100, the connection part 700 and the volute 100 can be respectively processed and molded, then the connection part 700 is assembled on the volute 100, the processing difficulty is favorably reduced, and the processing efficiency is improved. When the first baffle 300, the second baffle 400, the first connection rib 500 and the second connection rib 600 are damaged or need to be replaced, the connection part 700 can be detached from the scroll casing 100, thereby improving the convenience of the maintenance process. Specifically, an assembly hole may be provided on the connection portion 700, a threaded hole is correspondingly provided on the volute 100, and a bolt is used to pass through the assembly hole and then be screwed into the threaded hole, so as to lock the connection portion 700 in the volute 100, which is advantageous for improving the convenience of assembling and disassembling the connection portion 700.

As shown in fig. 1, 2 and 3, the connecting portion 700 further includes: a first connection part 710 and a second connection part 720, the first connection part 710 being connected to a first end of the first connection rib 500; the second connection portion 720 is connected to the second end of the second connection rib 600, and the first connection portion 710 and the second connection portion 720 can be respectively assembled to the scroll casing 100.

The plurality of first connection ribs 500 are connected to the first connection parts 710, and the plurality of second connection ribs 600 are connected to the second connection ribs 600, so that the first connection parts 710 and the second connection parts 720 can be provided as a separate structure. Because the structure of first guide plate 300 and second guide plate 400 is different, with fan housing integrated into one piece, so can divide into first cover body and the second cover body with the cover body, first cover body includes: the first baffle 300, the first connection rib 500 and the first connection part 710, the second cover body includes: the second guide plate 400, the second connection rib 600 and the second connection portion 720, the first cover body and the second cover body are respectively formed by machining, so that the machining convenience can be improved, and then the first cover body and the second cover body are respectively assembled on the volute 100 to realize the installation of the cover bodies.

Further, the fan still includes: a positioning part and a positioning groove, the positioning part is arranged on the volute 100; the positioning groove is disposed on the connecting portion 700, and the positioning portion can be accommodated in the positioning groove.

Location portion can play the positioning action to the installation of fan housing, specifically, can set up the mounting hole on connecting portion 700, the corresponding screw hole that sets up on spiral case 100, then threaded connection in the screw hole again through wearing enough mounting hole, realize the installation to the fan housing, at the in-process with bolted connection screw hole, need the staff to align mounting hole and screw hole, through setting up location portion on spiral case 100 in this application, with location portion embedding connecting portion 700 in the constant head tank, just realized the location to the fan housing, the mounting hole aligns the screw hole this moment, do not need the staff manual alignment, improve assembling process's convenience.

Further, the rotation shaft of the impeller 200 extends in the horizontal direction; the first guide plate 300 is parallel to the rotation axis of the impeller 200; the second baffle 400 is positioned below the first baffle 300 in the direction of the vertical line.

The upper airflow approaches the horizontal direction and flows into the scroll casing 100, so the first guide plate 300 is disposed parallel to the rotation axis of the impeller 200, that is, the first guide plate 300 extends in the horizontal direction to guide the upper airflow. The flow direction of the lower air stream tends to be perpendicular to the flow direction of the upper air stream, so the second baffle 400 is disposed below the first baffle 300 such that the second baffle 400 guides the lower air stream.

The embodiment of the utility model provides a range hood is proposed to the embodiment of the second aspect, include: like the fan in any embodiment above, consequently the utility model provides a lampblack absorber has the whole benefits of the fan that provides in any embodiment above-mentioned.

The range hood further comprises a shell, and the fan is installed in the shell.

In the present application, the term "plurality" means two or more unless expressly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The above embodiments are only used to illustrate the technical solution of the present invention, and do not limit the protection scope of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from these embodiments without any inventive step, are within the scope of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still make no creative work on the condition of conflict, and make mutual combination, addition and deletion, or other adjustments according to the features in the embodiments of the present invention, thereby obtaining other technical solutions which are different and do not depart from the concept of the present invention, and these technical solutions also belong to the scope to be protected by the present invention.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (12)

1. A fan, comprising:

the volute is provided with an air inlet;

the impeller is arranged in the volute and corresponds to the air inlet;

the air-inlet grille is arranged at the air inlet, the air-inlet grille comprises a first guide plate and a second guide plate, the axis of the impeller is arranged on the impeller, the impeller is arranged on the direction of the air inlet, and the second guide plate inclines towards the direction far away from the first guide plate.

2. The fan of claim 1,

the width direction of the first guide plate is set from the side of the first guide plate positioned in the volute to the side of the first guide plate positioned outside the volute;

the width direction of the second guide plate is set from the side of the second guide plate positioned in the volute to the side of the second guide plate positioned outside the volute;

an included angle between a straight line L1 in the width direction of the first guide plate and the axis of the impeller is more than 0 degree and less than or equal to 5 degrees;

an included angle between a straight line L2 in the width direction of the second baffle and the axis of the impeller is greater than or equal to 45 degrees and less than 90 degrees.

3. The fan of claim 2,

the first baffle is parallel to the axis of the impeller along the width direction of the first baffle.

4. The fan of claim 1, further comprising:

the first air inlet channel is formed between two adjacent first guide plates in the plurality of first guide plates;

and the second air inlet channel is formed between two adjacent second guide plates in the second guide plates.

5. The fan of claim 4,

the first baffle and the second baffle are each configured as an arc-shaped structure;

the first plurality of baffles and the second plurality of baffles are coaxially arranged.

6. The fan of claim 5, further comprising:

the first end of the first connecting rib is connected with the volute, and the first connecting rib is connected with the plurality of first guide plates so as to divide the first air inlet channel into a plurality of first sub air inlet channels;

and the first end of the second connecting rib is connected with the volute, and the second connecting rib is connected with a plurality of second guide plates so as to divide the second air inlet channel into a plurality of second sub air inlet channels.

7. The fan of claim 6, further comprising:

the connecting portion is arranged on the volute and connected with the first end of the first connecting rib and the first end of the second connecting rib.

8. The fan of claim 7,

the connecting part is detachably connected to the volute.

9. The fan of claim 7, wherein the connection portion comprises:

the first connecting part is connected to the first end of the first connecting rib;

and the second connecting part is connected to the second end of the second connecting rib, and the first connecting part and the second connecting part can be respectively assembled on the volute.

10. The fan of claim 7, further comprising:

the positioning part is arranged on the volute;

the positioning groove is arranged on the connecting part, and the positioning part can be contained in the positioning groove.

11. The fan according to any one of claims 1 to 8,

the rotating shaft of the impeller extends along the horizontal direction;

the first guide plate is parallel to the rotating shaft of the impeller;

along the plumb line direction, the second guide plate is located the below of first guide plate.

12. A range hood, comprising:

the blower of any one of claims 1-11.

Images