CN114060876B

CN114060876B - Fume exhaust fan

Info

Publication number: CN114060876B
Application number: CN202010760176.2A
Authority: CN
Inventors: 谭柏豪; 杨一川; 马世涛; 孙培原; 蒋济武
Original assignee: Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Current assignee: Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2023-07-18
Anticipated expiration: 2040-07-31
Also published as: CN114060876A

Abstract

The invention provides a range hood, which comprises: the tobacco machine body is provided with an air inlet; the fan is arranged in the tobacco machine body; the fixed filter screen is arranged at the air inlet; the rotary filter screen subassembly sets up the windward side at fixed filter screen, and the rotary filter screen subassembly can be rotatory for fixed filter screen, and the rotary filter screen subassembly includes: at least two rotary filter screens, each rotary filter screen is provided with a plurality of convex parts which are distributed at intervals, and any two adjacent rotary filter screens are meshed with each other through the convex parts. According to the range hood provided by the invention, the lampblack can fully collide with the rotary filter screen assembly and then collide with the fixed filter screen, so that the lampblack filtering effect of the range hood is improved, and the pollution of lampblack to the fan in the range hood body is reduced. Moreover, the rotary filter screen component can shield the fixed filter screen in a larger range, so that a large amount of oil smoke can be effectively prevented from directly flowing to the fixed filter screen while avoiding the rotary filter screen positioned at the front end, and the fixed filter screen is prevented from being blocked by the oil smoke.

Description

Fume exhaust fan

Technical Field

The invention relates to the technical field of kitchen equipment, in particular to a range hood.

Background

At present, in order to improve the oil fume filtering capacity of the range hood, a single-layer filter screen or a double-layer filter screen is mostly fixed at an air inlet, so that oil fume continuously collides with meshes of the filter screen to be condensed when flowing through the filter screen, and grease in the oil fume is filtered. But the mesh of the single-layer filter screen is smaller, and the long-term use can lead to mesh blockage, so frequent cleaning is needed, and the collision between the oil smoke and the filter screen is insufficient, so that the oil smoke filtering effect is poor. The double-layer filter screens are overlapped by the multi-purpose mutually staggered grids, so that the wind resistance is reduced, a distance is reserved between the double-layer filter screens, but the collision between the filter screens and the oil smoke is insufficient, and the effect of filtering the oil smoke is poor.

Disclosure of Invention

The present invention aims to at least ameliorate one of the technical problems of the prior art or the related art.

Therefore, the invention aims to provide a range hood.

In view of the above, an embodiment of the present invention provides a range hood, including: the tobacco machine body is provided with an air inlet; the fan is arranged in the tobacco machine body; the fixed filter screen is arranged at the air inlet; the rotary filter screen subassembly sets up the windward side at fixed filter screen, and the rotary filter screen subassembly can be rotatory for fixed filter screen, and the rotary filter screen subassembly includes: at least two rotary filter screens, each rotary filter screen is provided with a plurality of convex parts which are distributed at intervals, and any two adjacent rotary filter screens are meshed with each other through the convex parts.

The range hood provided by the embodiment comprises a range hood body, a fan, a fixed filter screen and a rotary filter screen component. The fan is arranged inside the smoke ventilator body and is used for sucking the oil smoke. Through set up fixed filter screen in the air intake department of cigarette machine body to set up the rotary filter screen subassembly in the windward side of fixed filter screen, the rotary filter screen subassembly sets up in the one side that the fan was kept away from to fixed filter screen promptly, the rotary filter screen subassembly shelters from the at least part of fixed filter screen, make the oil smoke can flow through fixed filter screen behind the rotary filter screen subassembly, and make the rotary filter screen subassembly can rotate for fixed filter screen, compare with the double-deck filter screen that sets up fixedly in the correlation technique, be favorable to oil smoke and rotary filter screen subassembly abundant collision, then collide with fixed filter screen again, make the oil smoke before getting into the air intake, can fully filter through rotary filter screen subassembly and fixed filter screen, improve the filter oil smoke effect of range hood, reduce the pollution of oil smoke to the inside fan of cigarette machine body.

Specifically, through making the rotary filter screen subassembly include two at least rotary filter screens, can shelter from fixed filter screen in a large scale, can effectively avoid a large amount of oil smoke to avoid the rotary filter screen that is located the front end and direct flow direction fixed filter screen, ensure the filtration oil smoke effect of range hood, avoid fixed filter screen to be blocked by the oil smoke. Especially, under the condition that the shape of the fixed filter screen is not matched with that of the rotary filter screen, if the fixed filter screen is mostly rectangular or elliptical, and the rotary filter screen does circular motion, a single rotary filter screen is not easy to shade the fixed filter screen in a large range. The number of the rotary filter screens is at least two, so that the fixed filter screens can be shielded in a larger range, and a large amount of oil smoke is prevented from directly passing through the fixed filter screens.

In addition, each rotary filter screen is provided with a plurality of protruding parts which are distributed at intervals, and any two adjacent rotary filter screens are meshed with each other through the protruding parts, so that synchronous rotation of at least two rotary filter screens is realized, the phenomenon that the adjacent two rotary filter screens interfere with air flow to affect the oil smoke filtering effect of the range hood due to rotation of different rotating speeds is avoided, and the phenomenon that the whole range hood shakes, noise is increased and the like due to rotation of the adjacent two rotary filter screens at different rotating speeds is avoided. Moreover, can realize driving one of them rotary filter screen rotation, can drive the rotation of other rotary filter screens for rotary filter screen subassembly whole rotation is easier, thereby makes things convenient for oil smoke and rotary filter screen subassembly to collide.

In addition, the range hood provided by the technical scheme of the invention has the following additional technical characteristics:

in one possible design, the rotary screen assembly is rotatable relative to the stationary screen by a fan-driven air flow.

In this design, the rotary screen assembly is specifically defined to rotate relative to the stationary screen under the action of the air flow carried by the fan, i.e., the rotary screen assembly is passively rotated. On one hand, a driving device for driving the rotary filter screen component to rotate is omitted, the structure is simplified, and the cost is reduced; on the other hand, the rotary filter screen component can rotate under the drive of air flow, so that the wind resistance can be reduced and the oil smoke filtering effect of the range hood can be improved while the filtering effect is ensured. Moreover, the rotary filter screen component is arranged on the windward side of the fixed filter screen, and the wind speed of the front end of the air inlet is high, so that the rotary filter screen component can still rotate rapidly and reach the maximum rotation speed rapidly when the range hood runs in a low gear.

Specifically, because any two adjacent rotary filter screens are meshed with each other through the protruding parts, even if the air current possibly drives different rotary filter screens to rotate in a small range at different speeds and even in a small range at different directions in an initial period of time, after the two protruding parts are meshed with each other, the rotary filter screens with high start speed or high rotating speed can drive the rest rotary filter screens to rotate, and finally, the two adjacent rotary filter screens can rotate at the same speed and in opposite directions, so that synchronous rotation of at least two rotary filter screens is realized.

In one possible design, each rotary screen includes: a first filter screen; the second filter screens are continuously distributed along the edge of the first filter screen and form an installation cavity with the first filter screen.

In this design, specifically make every rotary strainer include first filter screen and second filter screen, make the second filter screen follow the edge of first filter screen and distribute in succession in order to enclose with first filter screen and form the installation cavity, namely every rotary strainer has the first filter screen that constructs roof or diapire to and the second filter screen that constructs the lateral wall, be favorable to the oil smoke of multiple direction to all can collide with rotary strainer, like the oil smoke that flows with the direction perpendicular to fixed filter screen, or the oil smoke that flows with the slope of fixed filter screen, even with the oil smoke that fixed filter screen horizontal flow, all can collide with first filter screen or second filter screen of rotary strainer, ensure the effect of filtering the oil smoke.

In one possible design, a portion of the second screen bulges outwardly to form a bulge.

In this design, a portion of the second screen is specifically defined to be configured as a protrusion protruding outward, eliminating the need to additionally provide a protrusion on the second screen, and ensuring the connection strength of the protrusion and the second screen. Moreover, the second filter screens are continuously distributed along the edge of the first filter screen, so that the two adjacent second filter screens are meshed with each other through the protruding parts.

In one possible design, each projection has one of the opposite sides in the direction of rotation of the rotary screen, the one side being a mesh surface with meshes, and the other side being an air guiding surface.

In the design, one of two opposite side surfaces of each protruding part in the rotating direction of the rotary filter screen is a mesh surface with meshes, and the other side surface is an air guide surface without meshes, so that after air flows to the rotary filter screen, the air flow is impacted on the mesh surface and the air guide surface to generate different thrust, and the rotary filter screen can be ensured to rotate under the action of the air flow.

Further, in any two protruding portions engaged with each other, the wind guiding surface of one protruding portion is in contact with the mesh surface of the other protruding portion.

Because any two adjacent rotary filter screens can rotate in opposite directions, the wind guide surface of one convex part is contacted with the mesh surface of the other convex part in any two convex parts meshed with each other, and even if the two rotary filter screens rotate at different speeds and/or directions in an initial period, after the two convex parts are meshed with each other and the mesh surface is contacted with the wind guide surface, the adjacent two rotary filter screens can rotate at the same rotating speed and in opposite directions.

In one possible design, each rotary screen further comprises: the support frame is arranged in the mounting cavity and is connected with the second filter screen; the first end of the rotating shaft is rotationally connected with the fixed filter screen, and the second end of the rotating shaft penetrates through the supporting frame and is connected with the first filter screen.

In this design, specifically, it is still including setting up in the installation cavity to inject every rotary screen and support frame, and the pivot of connecting support frame and fixed filter screen with the medial surface of second filter screen. Through making the first end of pivot be connected with fixed filter screen rotation, make the second end of pivot pass the support frame and be connected with first filter screen, realized the stable connection of first filter screen and second filter screen.

In one possible design, the support frame has a plurality of spaced apart ledges, each ledge supporting one of the ledges.

In this design, the specifically defined support frame has a plurality of spaced apart projecting frames, and by having each projecting frame support one projecting portion, the support effect of the support frame is improved.

In one possible design, the range hood further comprises: the fixed seat is arranged on the fixed filter screen; the connecting seat is connected with the fixing seat; the bearing is arranged on the connecting seat; the first end of the rotating shaft passes through the bearing is connected with the connecting seat.

In this design, through setting up the fixing base on fixed filter screen, make the first end of pivot be connected with the connecting seat through the bearing, make the connecting seat be connected with the fixing base again, realized the indirect connection of pivot and fixed filter screen. Wherein, the existence of fixing base and connecting seat makes things convenient for the assembly of pivot on the one hand, and on the other hand is favorable to fixed filter screen steady support pivot.

In one possible design, at least two rotary screens are the same or different in size.

In the design, the sizes of at least two rotary filter screens are limited to be identical, so that the rotary filter screens are convenient to produce and process and convenient to replace. It is also defined that the at least two rotary screens may also be different in size, including different sizes for each rotary screen and different sizes for portions of the rotary screens. The rotary filter screens with different sizes can be used for better shielding the fixed filter screen.

In one possible design, at least two rotating screens do not overlap in a direction perpendicular to the stationary screen.

In this design, through making at least two rotatory filter screens not overlap in the direction of perpendicular to fixed filter screen, the tiling is in the windward side of fixed filter screen, is favorable to shielding fixed filter screen more extensively, ensures the effect of range hood filtration oil smoke.

In one possible design, at least two rotary screens are arranged in a single row in the width direction of the fixed screen; or at least two rotary filter screens are distributed in a plurality of rows in the width direction of the fixed filter screen; or one rotary filter screen corresponds to the middle part of the fixed filter screen, and the rest rotary filter screens are distributed around the rotary filter screen corresponding to the middle part of the fixed filter screen.

In this design, the arrangement of at least two rotary screens is defined in particular. At least two rotary filter screens can be distributed in a single row in the width direction of the fixed filter screen; at least two rotary filter screens can be distributed in multiple rows such as double rows, three rows and the like in the width direction of the fixed filter screen; the rest rotary filter screens can be distributed around one rotary filter screen. The rotary filter screen assembly can adopt various arrangement modes, and can be combined with the size of each rotary filter screen and the size of the fixed filter screen to select proper arrangement modes, so that the rotary filter screen assembly can shield the fixed filter screen in a large range. For example, when the inner diameter or the outer diameter of each rotary screen is equal to or larger than the width of the fixed screen, at least two rotary screens are distributed in a single row in the width direction of the fixed screen, so that the rotary screen assembly can shield the fixed screen in a large range. And under the condition that the inner diameter or the outer diameter of each rotary filter screen is smaller than the width of the fixed filter screen, the rotary filter screens can be distributed in double rows in the width direction of the fixed filter screen so as to make up that the size of one rotary filter screen is smaller than the width of the fixed filter screen. Under the condition that the outer diameter or the inner diameter of a rotary filter screen with a larger size is equal to the width of a fixed filter screen, the rotary filter screens with smaller sizes are distributed around the rotary filter screen with the larger size, so that the shielding of the middle area of the rotary filter screen is realized, the shielding of the corner area of the fixed filter screen is also realized, and the fixed filter screen is shielded in a larger range. Of course, the arrangement of the rotary screen is not limited to the above examples.

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

Fig. 1 shows a schematic structure of a range hood according to an embodiment of the present invention;

fig. 2 shows a partially disassembled schematic view of a range hood according to an embodiment of the present invention;

fig. 3 is a partial structural view of a range hood according to an embodiment of the present invention;

fig. 4 shows another partially disassembled schematic view of a range hood according to an embodiment of the present invention;

fig. 5 shows a further partially disassembled schematic illustration of a range hood according to an embodiment of the invention;

fig. 6 is a schematic view showing another partial structure of a range hood according to an embodiment of the present invention;

fig. 7 is a schematic view showing a structure of a rotary screen of a range hood according to an embodiment of the present invention;

fig. 8 shows a schematic cross-sectional view of a rotary screen of a range hood according to an embodiment of the present invention;

fig. 9 is a schematic view showing the structure of two rotary screens of a range hood according to an embodiment of the present invention;

fig. 10 is a partial structural view showing two rotary screens of a range hood according to an embodiment of the present invention;

fig. 11 is a partial structural view showing a range hood according to an embodiment of the present invention;

fig. 12 is a partial structural view showing a range hood according to another embodiment of the present invention;

fig. 13 is a partial structural view showing a range hood according to still another embodiment of the present invention.

Wherein, the correspondence between the reference numerals and the component names in fig. 1 to 13 is:

110 smoke machine body, 111 air intake, 112 smoke collecting hood, 113 guide plate, 120 fixed filter screen, 130 rotary filter screen, 131 first filter screen, 132 second filter screen, 133 convex part, 1331 mesh surface, 1332 air guiding surface, 134 installation cavity, 135 supporting frame, 1351 convex frame, 1352 supporting platform, 136 rotating shaft, 137 locking nut, 140 fixing seat, 150 connecting seat, 160 bearing, 170 first condensing plate, 171 bracket.

Detailed Description

In order that the above-recited objects, features and advantages of the present invention will be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

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 described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.

A range hood according to some embodiments of the present invention will be described with reference to fig. 1 to 13.

Embodiment one:

as shown in fig. 1, 2 and 3, a range hood includes a hood body 110, a blower, a fixed filter 120 and a rotary filter assembly. Wherein, the cigarette machine body 110 is provided with the air intake 111, and the fan sets up in the cigarette machine body 110, and fixed filter screen 120 sets up in air intake 111 department, and the rotary filter screen subassembly sets up the windward side at fixed filter screen 120. The rotary screen assembly is rotatable relative to the stationary screen 120, the rotary screen assembly comprising at least two rotary screens 130, each rotary screen 130 having a plurality of projections 133 spaced apart, any adjacent two rotary screens 130 intermeshed with each other by the projections 133.

The range hood provided in this embodiment includes a hood body 110, a fan, a fixed filter 120, and a rotary filter assembly. The fan is disposed inside the range hood body 110 for sucking the oil smoke. Through set up fixed filter screen 120 in the air intake 111 department of cigarette machine body 110 to set up the rotary filter screen subassembly in the windward side of fixed filter screen 120, also the rotary filter screen subassembly sets up in the one side that fixed filter screen 120 kept away from the fan, the rotary filter screen subassembly shelters from at least a portion of fixed filter screen 120, make the oil smoke can flow through fixed filter screen 120 behind the rotary filter screen subassembly, and make the rotary filter screen subassembly can rotate for fixed filter screen 120, compare with the double-deck filter screen that sets up fixed in the correlation technique, be favorable to oil smoke and rotary filter screen subassembly abundant collision, then collide with fixed filter screen 120 again, make the oil smoke can fully filter through rotary filter screen subassembly and fixed filter screen 120 before getting into air intake 111, improve the filter oil smoke effect of range hood, reduce the pollution of oil smoke to the inside fan of cigarette machine body 110.

Specifically, through making the rotary filter screen subassembly include two at least rotary filter screens 130, can shelter from fixed filter screen 120 in a large scale, can effectively avoid a large amount of oil smoke to avoid the rotary filter screen 130 that is located the front end and direct flow direction fixed filter screen 120, ensure the oil smoke effect of the filter of range hood, avoid fixed filter screen 120 to be blocked by the oil smoke. Particularly, in the case that the shape of the fixed screen 120 is not matched with that of the rotary screen 130, for example, the fixed screen 120 is mostly rectangular or elliptical, and the rotary screen 130 performs circular motion, the single rotary screen 130 is not easy to block the fixed screen 120 in a wide range. By making the number of the rotary screen 130 at least two, the fixed screen 120 can be shielded in a wider range, thereby preventing a large amount of oil smoke from directly passing through the fixed screen 120.

In addition, each rotary filter screen 130 is provided with a plurality of protruding parts 133 which are distributed at intervals, and any two adjacent rotary filter screens 130 are meshed with each other through the protruding parts 133, so that synchronous rotation of at least two rotary filter screens 130 is facilitated, the phenomenon that the adjacent two rotary filter screens 130 interfere with air flow to affect the oil smoke filtering effect of the range hood due to rotation of different rotating speeds is avoided, and the phenomenon that the whole range hood shakes, noise increases and the like due to rotation of the adjacent two rotary filter screens 130 at different rotating speeds is avoided. Moreover, one of the rotary filter screens 130 can be driven to rotate, and the other rotary filter screens 130 can be driven to rotate, so that the rotary filter screen assembly is easier to integrally rotate, and the oil smoke and the rotary filter screen assembly are convenient to collide.

Further, as shown in fig. 4, the side of each rotary screen 130 has a plurality of protrusions 133 spaced apart, and the plurality of protrusions 133 are uniformly distributed circumferentially around the rotation center line of the rotary screen 130.

In a particular embodiment, the rotary screen assembly is rotatable relative to the stationary screen 120 by a fan-driven airflow.

In this embodiment, the rotary screen assembly is specifically defined to rotate relative to the stationary screen 120 under the influence of the fan-driven air flow, i.e., the rotary screen assembly is passively rotated. On one hand, a driving device for driving the rotary filter screen component to rotate is omitted, the structure is simplified, and the cost is reduced; on the other hand, the rotary filter screen component can rotate under the drive of air flow, so that the wind resistance can be reduced and the oil smoke filtering effect of the range hood can be improved while the filtering effect is ensured. Moreover, the rotary filter screen assembly is arranged on the windward side of the fixed filter screen 120, and the wind speed of the front end of the wind inlet 111 is high, so that the rotary filter screen assembly can still rotate rapidly and reach the maximum rotation speed rapidly when the range hood operates in a low gear.

Specifically, since any two adjacent rotary strainers 130 are engaged with each other through the protrusion 133, even if the air flow may drive different rotary strainers 130 to rotate at different speeds and even in different directions in a small extent in the initial period of time, when the two protrusion 133 are engaged with each other, the rotary strainers 130 with a fast start or a fast rotation speed will drive the rest of the rotary strainers 130 to rotate, and finally, the two adjacent rotary strainers 130 will rotate at the same speed in opposite directions, so that synchronous rotation of at least two rotary strainers 130 is realized.

Of course, in other embodiments, a motor may be used to drive the rotary screen assembly. Specifically, the motor drives one rotary screen 130 of the at least two rotary screens 130 to rotate, thereby driving the regional rotary screen 130 to rotate.

Embodiment two:

on the basis of the first embodiment described above, as shown in fig. 4, it is further defined that each rotary screen 130 includes a first screen 131 and a second screen 132. The second filter screens 132 are continuously distributed along the edge of the first filter screen 131 and form a mounting cavity 134 around the first filter screen 131.

In this embodiment, each rotary screen 130 includes a first screen 131 and a second screen 132, and the second screens 132 are continuously distributed along the edge of the first screen 131 to form a mounting cavity 134 around the first screen 131, that is, each rotary screen 130 has the first screen 131 configured as a top wall or a bottom wall, and the second screen 132 configured as a side wall, so that soot in multiple directions can collide with the rotary screen 130, such as soot flowing in a direction perpendicular to the fixed screen 120, or soot flowing obliquely with respect to the fixed screen 120, even soot flowing horizontally with respect to the fixed screen 120, can collide with the first screen 131 or the second screen 132 of the rotary screen 130, and the effect of filtering soot can be ensured.

Specifically, the second screen 132 extends in a direction away from the first screen 131.

Further, the second filter screen 132 is located at a side of the first filter screen 131 adjacent to the fixed filter screen 120. The middle part of the first filter screen 131 is recessed into the accommodating cavity, so that wind resistance is reduced, and the first filter screen is driven by air flow to rotate.

Or further, as shown in fig. 4 and 6, the second filter screen 132 is located at a side of the first filter screen 131 remote from the fixed filter screen 120.

Embodiment III:

on the basis of the above-described second embodiment, as shown in fig. 7, it is further defined that a portion of the second screen 132 is outwardly convex configured as a convex portion 133.

In this embodiment, it is specifically defined that a portion of the second screen 132 is outwardly protruded to be configured as the protrusion 133, eliminating the necessity of additionally providing the protrusion 133 on the second screen 132, and securing the connection strength of the protrusion 133 with the second screen 132. Moreover, since the second screens 132 are continuously distributed along the edges of the first screens 131, the engagement between adjacent two second screens 132 by the protrusions 133 is facilitated.

In a specific embodiment, as shown in fig. 7, 9 and 10, each of the protrusions 133 is formed at opposite sides of the rotary screen 130 in the rotation direction, one side being a mesh surface 1331 having meshes, and the other side being an air guiding surface 1332.

In this embodiment, by making one of the opposite sides of each protrusion 133 in the rotation direction of the rotary screen 130 be a mesh surface 1331 having meshes and the other be an air guiding surface 1332 having no meshes, it is advantageous that the air flow, after flowing toward the rotary screen 130, impinges on the mesh surface 1331 and the air guiding surface 1332 to generate different thrust forces, thereby ensuring that the rotary screen 130 can rotate under the action of the air flow.

Further, as shown in fig. 9 and 10, of the two projecting portions 133 that are arbitrarily engaged, the wind guiding surface 1332 of one projecting portion 133 is in contact with the mesh surface 1331 of the other projecting portion 133.

Since any two adjacent rotary screens 130 are rotated in opposite directions, by bringing the air guiding surface 1332 of one of the two protruding portions 133 into contact with the mesh surface 1331 of the other protruding portion 133, even if the two rotary screens 130 are rotated at different speeds and/or directions during the initial period of time, it is possible to ensure that the adjacent two rotary screens 130 are rotated at the same rotational speed and in opposite directions after the mesh surfaces 1331 are brought into contact with the air guiding surface 1332 by the two protruding portions 133 engaged with each other.

Of course, in other embodiments, the protrusion 133 may be additionally disposed on the second filter 132. Or a plurality of protrusions 133 are provided on the first filter screen 131, and in this case, the protrusions 133 need to protrude beyond the edge of the first filter screen 131 to engage with the protrusions 133 of the other rotary filter screen 130.

Embodiment four:

on the basis of the second or third embodiment, as shown in fig. 4, 5 and 8, it is further defined that each rotary screen 130 further includes a support frame 135 and a rotating shaft 136. The support frame 135 is arranged in the installation cavity 134 and is connected with the second filter screen 132; the first end of the rotating shaft 136 is rotatably connected with the fixed screen 120, and the second end of the rotating shaft 136 passes through the supporting frame 135 and is connected with the first screen 131.

In this embodiment, each rotary screen 130 is further defined as including a support frame 135 disposed within the mounting cavity 134 and coupled to an inner side of the second screen 132, and a shaft 136 connecting the support frame 135 and the fixed screen 120. By rotatably connecting the first end of the rotation shaft 136 with the fixed filter screen 120 and connecting the second end of the rotation shaft 136 with the first filter screen 131 through the support frame 135, stable connection of the first filter screen 131 and the second filter screen 132 is achieved.

Further, as shown in fig. 4, the number of the supporting frames 135 is two, and the supporting frames are disposed on two opposite sides of the second filter screen 132, so that the supporting effect is good. In addition, the rotating shaft 136 is connected with the two supporting frames 135 at the same time, so that the connection stability of the first filter screen 131, the second filter screen 132 and the rotating shaft 136 is improved.

In a specific embodiment, as shown in fig. 5, the support frame 135 has a plurality of spaced apart ledges 1351, each ledge 1351 supporting one of the projections 133.

In this embodiment, the support frame 135 is specifically defined to have a plurality of protruding frames 1351 spaced apart, and the supporting effect of the support frame 135 is improved by having each protruding frame 1351 support one protruding portion 133.

Further, as shown in fig. 5, a supporting platform 1352 is disposed at an end of each protruding frame 1351, and a supporting platform 1352 is disposed between two adjacent protruding frames 1351, and contacts with an inner side surface of the second filter screen 132 through the supporting platform 1352.

Further, the outer contour of the support shelf 135 matches the inner contour of the second screen 132.

In one embodiment, as shown in fig. 4, 5 and 8, the range hood further includes a fixing base 140, a connection base 150 and a bearing 160. The fixed seat 140 is arranged on the fixed filter screen 120; the connecting seat 150 is connected with the fixed seat 140; a bearing 160 disposed on the connection base 150; the first end of the rotating shaft 136 is connected to the connection base 150 through a bearing 160.

In this embodiment, by providing the fixing base 140 on the fixed filter screen 120, the first end of the rotating shaft 136 is connected to the connecting base 150 through the bearing 160, and then the connecting base 150 is connected to the fixing base 140, the indirect connection between the rotating shaft 136 and the fixed filter screen 120 is achieved. The fixing base 140 and the connecting base 150 facilitate the assembly of the rotating shaft 136, and facilitate the fixing of the filter screen 120 to stably support the rotating shaft 136.

Fifth embodiment:

on the basis of any of the above embodiments, as shown in fig. 11, 12 and 13, it is further defined that at least two rotary screens 130 are the same or different in size.

In this embodiment, the dimensions of the at least two rotary screens 130 are specifically defined to be identical, facilitating manufacturing and replacement. It is also defined that the dimensions of at least two rotary screens 130 may be different, including different dimensions for each rotary screen 130 and different dimensions for portions of rotary screens 130. Advantageously, the fixed screen 120 is better shielded by the different sized rotary screen 130.

Further, at least two rotary filter screens 130 are not overlapped in the direction perpendicular to the fixed filter screen 120, and are tiled on the windward side of the fixed filter screen 120, which is beneficial to shielding the fixed filter screen 120 in a larger range and ensuring the effect of the range hood in filtering oil smoke.

In a specific embodiment, at least two rotary screens 130 are arranged in a single row across the width of the stationary screen 120.

In another specific embodiment, as shown in fig. 11 and 13, at least two rotary screens 130 are arranged in a plurality of rows in the width direction of the fixed screen 120. For example, four or six rotary screens 130 are arranged in double rows in the width direction of the fixed screen 120.

In another specific embodiment, as shown in fig. 12, one rotary screen 130 corresponds to the middle of the fixed screen 120, and the remaining rotary screens 130 are distributed around the rotary screen 130 corresponding to the middle of the fixed screen 120, among at least two rotary screens 130. For example, one rotary screen 130 corresponds to the middle of the fixed screen 120, and four rotary screens 130 are distributed around the rotary screen 130 corresponding to the middle of the fixed screen 120.

Example six:

on the basis of any of the above embodiments, as shown in fig. 2, further defining that the range hood further includes a first condensation plate 170, the first condensation plate 170 is disposed on a side of the rotary screen assembly facing away from the fixed screen 120 assembly, and the first condensation plate 170 is capable of shielding the rotary screen assembly. In the process of cooking food, the oil smoke rises because the oil smoke contacts the first condensing plate 170 first, and the oil smoke is more easily intercepted by the rotary filter screen assembly and the fixed filter screen 120 after being condensed by the first condensing plate 170, so that the oil smoke filtering effect of the range hood is improved.

Further, as shown in fig. 2, the range hood further includes at least one bracket 171, and the first condensing plate 170 is connected to the hood body 110 through the at least one bracket 171.

Further, the range hood further includes a second condensing plate (not shown) disposed on at least one side of the first condensing plate 170, and the second condensing plate can be close to or far from the first condensing plate 170 so that the oil smoke enters the hood body 110 through a gap between the first condensing plate 170 and the second condensing plate.

Further, as shown in fig. 1, the range hood body 110 further includes a smoke collecting hood 112 disposed at one side of the range hood body 110.

Further, as shown in fig. 1, the smoke machine body 110 further includes a deflector 113 disposed on an inner sidewall of the smoke collecting hood 112 and inclined with respect to the fixed filter 120.

In the present invention, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more, unless expressly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Embodiment seven:

a range hood according to an embodiment of the present invention will be described in detail. As shown in fig. 2 to 10, the range hood includes a hood body 110, a blower, a fixed filter 120, and a rotary filter assembly. The smoke machine body 110 is provided with an air inlet 111, the fan is arranged in the smoke machine body 110, and the fixed filter screen 120 is rectangular and is arranged at the air inlet 111. The rotary screen assembly is disposed on the windward side of the stationary screen 120. The rotary screen assembly is capable of rotating relative to the stationary screen 120 under the influence of the fan-driven air flow. The rotary filter assembly comprises two rotary filter screens 130, wherein the two rotary filter screens 130 are distributed left and right in the length direction of the fixed filter screen 120, when the two rotary filter screens 130 are started, the two rotary filter screens 130 are driven by air flow driven by a fan, and the convex parts 133 on the peripheral side surfaces of the rotary filter screens 130 can push each other, so that the rotary filter screens 130 can rotate more easily.

The protrusions 133 are uniformly distributed on the surface of the second screen 132 (i.e., the side screen) in each rotary screen 130. The supporting frames 135 are vertically installed inside the second filter screen 132 and connected to the inner side surface of the second filter screen 132. The first filter screen 131 (i.e. bottom screen) is used for covering the bottom of the second filter screen 132 to support the second filter screen 132, the second end of the rotating shaft 136 penetrates through the supporting frame 135 and is fixed on the bottom of the rotating filter screen 130 through the locking nut 137, i.e. fixed on the first filter screen 131, the first end of the rotating shaft 136 is installed on the bearing 160 in the connecting seat 150, and the rotating filter screen 130 is fixed on the fixing seat 140 on the fixed filter screen 120 through the connecting seat 150.

Two rotary screens 130 are fixed under the fixed screen 120, and the two rotary screens 130 are staggered and mated with each other by the protrusions 133. If the whole range hood is positioned at the rear side of the range hood, the air intake 111 has larger air intake, and most of the oil smoke flows through the front end of the air intake 111 to enter the interior of the range hood, and pushes the rotary filter screen 130 when flowing through. Since the rotation directions of the two rotary screens 130 are opposite, the arrangement directions of the mesh surface 1331 and the air guide surface 1332 of the rotary screens 130 contacting each other are also opposite, and finally the rotation direction of the rotary screens 130 is changed.

The rotary filter screens 130 in contact with each other are constantly in staggered fit and synchronous in rotation speed, so that the phenomenon that the whole machine shakes due to the fact that the rotation speeds of the two rotary filter screens 130 are asynchronous can be effectively prevented. In addition, when the intake air amount of the two rotary filter screens 130 is not uniform, the two rotary filter screens 130 cannot be started at the same time easily, in this embodiment, the two rotary filter screens 130 are in contact with each other, and the one that starts fast can drive the start to be slow, so that synchronous rotation is finally realized.

In addition, in other embodiments, the number of rotary screen 130 may be one. In order to allow the rotary screen 130 to more widely shield the fixed screen 120. The rotary screen 130 may be made to shade at least a part of the widthwise edge of the fixed screen 120. Thereby avoiding that a large amount of oil smoke collides with the fixed filter screen 120 directly by avoiding the rotary filter screen 130 which is arranged at the front end and can rotate, leading to the extremely easy blockage of the fixed filter screen 120 and affecting the oil smoke filtering effect. Wherein the directions indicated by double arrows in fig. 11 represent the width direction of the fixed screen 120.

In particular applications, the length of rotary screen 130 beyond stationary screen 120 may be at least 10% of the width of stationary screen 120. The oil smoke filtering effect is good.

In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or units referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.

In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean 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 present invention. In this specification, schematic representations of the above terms 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 is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A range hood, comprising:

the tobacco machine body is provided with an air inlet;

the fan is arranged in the cigarette machine body;

the fixed filter screen is arranged at the air inlet;

the rotary filter screen subassembly sets up the windward side of fixed filter screen, the rotary filter screen subassembly can for fixed filter screen is rotatory, the rotary filter screen subassembly includes:

at least two rotary filter screens, wherein each rotary filter screen is provided with a plurality of convex parts which are distributed at intervals, and any two adjacent rotary filter screens are meshed with each other through the convex parts;

each of the rotary screen includes:

a first filter screen;

the second filter screens are continuously distributed along the edge of the first filter screen and form a mounting cavity with the first filter screen in a surrounding mode;

a portion of the second screen is configured to project outwardly as the projection;

each protruding part is arranged on two opposite side surfaces of the rotary filter screen in the rotating direction, one side surface is a mesh surface with meshes, and the other side surface is an air guide surface;

in any two engaged projections, the wind guiding surface of one of the projections is in contact with the mesh surface of the other projection.

2. The range hood of claim 1, wherein the range hood further comprises a hood body,

the rotary filter screen component can rotate relative to the fixed filter screen under the action of air flow driven by the fan.

3. The range hood of claim 1, wherein the range hood further comprises a hood body,

each of the rotary screen further comprises:

the support frame is arranged in the mounting cavity and is connected with the second filter screen;

the first end of the rotating shaft is rotationally connected with the fixed filter screen, and the second end of the rotating shaft penetrates through the supporting frame and is connected with the first filter screen.

4. The range hood according to claim 3, wherein,

the support frame is provided with a plurality of protruding frames which are distributed at intervals, and each protruding frame supports one protruding part.

5. The range hood according to claim 3, wherein,

the range hood further includes:

the fixed seat is arranged on the fixed filter screen;

the connecting seat is connected with the fixed seat;

the bearing is arranged on the connecting seat;

the first end of the rotating shaft is connected with the connecting seat through the bearing.

6. A range hood according to claim 1 or 2, characterized in that,

the at least two rotary screens are the same or different in size; and/or

The at least two rotary screens do not overlap in a direction perpendicular to the stationary screen.

7. The range hood of claim 6, wherein the range hood further comprises a hood body,

the at least two rotary filter screens are distributed in a single row in the width direction of the fixed filter screen; or (b)

The at least two rotary filter screens are distributed in a plurality of rows in the width direction of the fixed filter screen; or (b)

One rotary filter screen corresponds to the middle part of the fixed filter screen, and the rest rotary filter screens are distributed around the rotary filter screen corresponding to the middle part of the fixed filter screen.