CN212079744U - Air suction device and range hood - Google Patents

Abstract

The utility model provides an induced draft device and lampblack absorber relates to kitchen appliance technical field. The air suction device comprises a left shell and a right shell, wherein the left shell comprises a left outer cover part and a left volute part, and the left volute part and the left outer cover part are integrally formed; the right shell comprises a right outer cover part and a right volute part which are integrally formed; the left outer cover part and the right outer cover part are correspondingly connected to form a fan outer cover, and the left volute part and the right volute part are correspondingly connected to form a volute; the air suction device further comprises a driving assembly and an impeller, the impeller is located in the volute, the driving assembly is installed on the volute, and the driving assembly is used for driving the impeller to rotate. This lampblack absorber includes collection petticoat pipe and above-mentioned device that induced drafts, and the collection petticoat pipe is installed in the bottom of the fan dustcoat of the device that induced drafts. The volute and the outer cover of the fan of the air suction device only need to be assembled once, the assembling steps of the volute and the outer cover of the fan are few, the connecting position precision is high, and the air suction effect of the fan and the range hood is correspondingly improved.

Description

Air suction device and range hood

Technical Field

The utility model belongs to the technical field of the kitchen appliance technique and specifically relates to a device and lampblack absorber induced draft is related to.

Background

The range hood is an electrical appliance widely applied to a kitchen, a fan in the range hood operates to generate negative pressure, oil smoke on the kitchen side is sucked into the fan, and the oil smoke is conveyed into a public flue through an exhaust pipe, so that the fan is a core component of the range hood.

In current lampblack absorber, the fan is generally installed in the fan dustcoat, and the fan dustcoat is the rectangle framework that a plurality of sheet metal component equipment formed, and the spiral case of fan also is the wind channel that a plurality of plate body equipment formed, because the equipment step between them is more, and the accumulative total error is big, and the degree of difficulty when spiral case and fan dustcoat are connected is great, and the mounted position deviation that leads to the spiral case is great, and then influences the effect of induced drafting of fan and lampblack absorber.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an induced draft device and lampblack absorber to alleviate existing among the prior art because the equipment step is many, the accumulative total error is big, results in the spiral case to install the position precision in the fan dustcoat poor, influences the technical problem of fan and lampblack absorber effect of induced drafting.

The embodiment provides an air suction device, which comprises a left shell and a right shell, wherein the left shell comprises a left outer cover part and a left volute part, and the left volute part and the left outer cover part are integrally formed; the right shell comprises a right outer cover part and a right volute part, and the right volute part and the right outer cover part are integrally formed; the left outer cover part and the right outer cover part are correspondingly connected to form a fan outer cover, and the left volute part and the right volute part are correspondingly connected to form a volute;

the air suction device further comprises a driving assembly and an impeller, the impeller is located in the volute, the driving assembly is installed in the volute, and the driving assembly is used for driving the impeller to rotate.

In an alternative embodiment, one of the left air inlet of the left volute part and the right air inlet of the right volute part is provided with a first support frame, the other one of the left air inlet and the right air inlet is provided with a second support frame, one end of the driving assembly is connected to the first support frame, and the other end of the driving assembly is connected to the second support frame.

In an alternative embodiment, the first support frame is disposed at the right air inlet, the second support frame is disposed at the left air inlet, and the first support frame and the right volute portion are integrally formed; and/or the second support frame and the left volute portion are integrally formed.

In an alternative embodiment, the drive assembly includes an inner rotor motor, an outer shell of the inner rotor motor includes a containing shell and an end cover, the containing shell is integrally formed with the first support frame, and an outer stator of the inner rotor motor is fixedly connected in the containing shell as an insert when the outer stator is integrally formed; the inner rotor of the inner rotor motor is pivoted in the outer stator, the end cover is arranged at the opening end of the accommodating shell, one end of the rotating shaft of the inner rotor motor is fixedly connected with the inner rotor, the other end of the rotating shaft extends out of the end cover and the second supporting frame, and the impeller is fixedly connected with the rotating shaft extending out of the shaft body of the end cover.

In an optional embodiment, the driving assembly includes an outer rotor motor, a housing of the outer rotor motor is fixedly connected to the center plate of the impeller, one end of a connecting shaft of the outer rotor motor is fixedly connected to the first support frame, and the other end of the connecting shaft of the outer rotor motor is fixedly connected to the second support frame.

In an alternative embodiment, the central disc is located at a midpoint position in the axial direction of the impeller, and the outer shell of the outer rotor motor is symmetrically arranged around the central disc.

In an alternative embodiment, a left noise reduction assembly is arranged at a position of the left outer cover part corresponding to the left air inlet of the left volute part;

and/or a right noise reduction component is arranged at the corresponding position of the right outer cover part and the right air inlet of the right volute part.

In an optional embodiment, a left air guide ring is arranged around a left air inlet of the left volute part; and/or a right air guide ring is arranged around a right air inlet of the right volute part.

In an optional implementation manner, the left outer cover portion is provided with a plurality of left engaging lugs, the right outer cover portion is provided with a plurality of right engaging lugs, and the left engaging lugs and the right engaging lugs are detachably fixedly connected in a one-to-one correspondence manner.

The embodiment also provides a range hood, including collection petticoat pipe and above-mentioned device that induced drafts, collection petticoat pipe install in the bottom of the fan dustcoat of device that induced drafts.

The utility model discloses air suction device and lampblack absorber's beneficial effect includes:

the utility model provides an air suction device and a range hood, wherein, the air suction device comprises a left shell and a right shell which can form a fan outer cover and a volute simultaneously through one-time assembly, and also comprises an impeller arranged in the volute and a driving component used for driving the impeller to rotate; wherein, the lampblack absorber is including gathering together the collection petticoat pipe that collects and the device that induced drafts that can carry out the suction to oil smoke gas above-mentioned.

Because the left outer cover part of the left shell and the left volute part are integrally formed, the position precision of the left volute part arranged inside the left outer cover part is higher, other assembling steps are not needed between the left outer cover part and the left volute part, and the firmness and the stability of connection between the left outer cover part and the left volute part are higher; similarly, the right outer cover portion and the right volute portion of the right shell are integrally formed, the position accuracy of the right volute portion arranged inside the right outer cover portion is high, other assembling steps are not needed between the right volute portion and the right volute portion, and the firmness of connection and the stability between the right volute portion and the right volute portion are high. When the air suction device needs to be assembled, only the impeller and the driving assembly need to be installed on one of the left volute part and the right volute part, then the left outer cover part is aligned with the right outer cover part, the left outer cover part and the right outer cover part jointly form a fan outer cover, meanwhile, the left volute part and the right volute part are correspondingly aligned to jointly form a volute of the fan, and the impeller is located inside the volute; and then the left outer cover part and the right outer cover part are connected, or the left volute part and the right volute part are connected.

That is, in this device induced drafts, the relative position precision of the left volute portion of spiral case and the left dustcoat portion of fan dustcoat is higher, the relative position precision of the right volute portion of spiral case and the right dustcoat portion of fan dustcoat is also higher, and the equipment of spiral case can be realized simultaneously through the equipment step to left casing and right casing only, the equipment of fan dustcoat and the spiral case is connected with the fan dustcoat, the relative position precision of spiral case and fan dustcoat is high, and the equipment step is few, equipment accumulative error is less, the position precision that the spiral case was installed at fan dustcoat inside further improves, induced draft angle etc. when the fan moves can be guaranteed, the effect of induced drafting and the air performance of fan and lampblack absorber are all preferred. In addition, the assembly steps of the air suction device are few, the processing difficulty can be effectively reduced, and the processing cost is reduced.

The collection petticoat pipe is installed in the bottom of the device that induced drafts, and collection petticoat pipe is the intercommunication state with the fan dustcoat, when needing to use the lampblack absorber, opens drive assembly, and drive assembly drive impeller rotates, is the negative pressure state in spiral case and the fan dustcoat, and outside oil smoke gas gets into collection petticoat pipe under inside and outside pressure differential effect, and then gets into in the fan dustcoat to in the air intake through the spiral case flows into the spiral case, discharge at last.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is an outline view of a range hood provided by an embodiment of the present invention;

fig. 2 is a front view of an air suction device according to an embodiment of the present invention in a first form;

FIG. 3 is a cross-sectional view of the air suction device of FIG. 2 taken in the direction of A-A;

FIG. 4 is an exploded view of a range hood employing the suction device of FIG. 2;

fig. 5 is a front view of a part of components of an air suction device according to a first embodiment of the present invention;

FIG. 6 is a cross-sectional view taken along line B-B of FIG. 5;

FIG. 7 is an exploded view of the suction device of FIG. 5, including some of the components;

fig. 8 is a front view of an air suction device according to a second embodiment of the present invention;

FIG. 9 is a cross-sectional view in the direction C-C of the suction device of FIG. 8;

FIG. 10 is an exploded view of a range hood employing the suction device of FIG. 8;

fig. 11 is a first exploded view of the suction device of fig. 8;

fig. 12 is a second exploded view of the suction device of fig. 8.

Icon: 10-a suction device; 100-left housing; 110-a left outer cover; 111-left side panel; 112-left mounting hole; 120-left volute portion; 121-left air inlet; 130-a second support; 140-a left noise reduction cap; 150-left noise reducing cotton; 160-left wind guiding ring; 200-right housing; 210-a right outer cover portion; 211-right side panel; 212-right top plate; 213-right mounting hole; 220-right volute portion; 221-right air inlet; 230-a first support frame; 240-right noise reduction cap; 250-right noise reducing cotton; 260-right wind-guiding ring; 270-right connecting lug; 300-inner rotor motor; 310-a first housing; 311-a containment shell; 312-end cap; 320-an outer stator; 330-inner rotor; 340-a rotating shaft; 350-a fixed cap; 400-outer rotor motor; 410-a second housing; 420-an outer rotor; 430-an inner stator; 440-a connecting shaft; 500-an impeller; 510-a cylinder body; 520-middle disc; 600-an oil filter screen; 700-protective shell; 800-decorative shell; 20-smoke collecting hood; 30-check valve.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "vertical", "horizontal", "inner", "outer", and the like indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are usually placed when in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the term refers must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

The present embodiment provides an air suction device 10, which includes a left casing 100 and a right casing 200, wherein the left casing 100 includes a left outer cover portion 110 and a left volute portion 120, and the left volute portion 120 and the left outer cover portion 110 are integrally formed; the right housing 200 includes a right outer cover portion 210 and a right volute portion 220, the right volute portion 220 being integrally formed with the right outer cover portion 210; the left housing part 110 and the right housing part 210 are correspondingly connected to form a fan housing, and the left volute part 120 and the right volute part 220 are correspondingly connected to form a volute; the suction device 10 further includes a driving assembly and an impeller 500, the impeller 500 is located in the volute, the driving assembly is mounted to the volute, and the driving assembly is used for driving the impeller 500 to rotate.

The present embodiment further provides a range hood, as shown in fig. 1, including a smoke collecting hood 20 and the above air suction device 10, wherein the smoke collecting hood 20 is installed at a bottom end of a fan housing of the air suction device 10.

The air suction device 10 and the range hood provided by the embodiment, wherein the air suction device 10 comprises a left shell 100 and a right shell 200 which can form a fan outer cover and a volute simultaneously through one-time assembly, and further comprises an impeller 500 installed in the volute and a driving assembly for driving the impeller 500 to rotate; wherein, the lampblack absorber includes can gather together the collection petticoat pipe 20 that collects to the oil smoke gas and above-mentioned device 10 that induced drafts that can carry out the suction to the oil smoke gas.

Because the left housing part 110 of the left housing 100 and the left volute part 120 are integrally formed, the position accuracy of the left volute part 120 arranged inside the left housing part 110 is high, other assembling steps are not required between the left housing part and the left volute part, and the firmness and the stability of connection between the left housing part and the left volute part are high; similarly, the right housing portion 210 and the right volute portion 220 of the right housing 200 are also integrally formed, the position accuracy of the right volute portion 220 arranged inside the right housing portion 210 is high, no other assembling steps are required between the right volute portion and the right volute portion, and the firmness and stability of connection between the right volute portion and the right volute portion are high. When the air suction device 10 needs to be assembled, the impeller 500 and the driving assembly are only needed to be installed on one of the left volute portion 120 and the right volute portion 220, then the left housing portion 110 is aligned with the right housing portion 210, the left housing portion 110 and the right housing portion 210 jointly form a fan housing, meanwhile, the left volute portion 120 and the right volute portion 220 are correspondingly aligned to jointly form a volute of the fan, and the impeller 500 is located inside the volute; the left and right housing portions 110 and 210 are then connected, or the left and right volute portions 120 and 220 are connected.

That is, in this air suction device 10, the accuracy of the relative position between the left volute portion 120 of the volute and the left outer cover portion 110 of the fan housing is high, the accuracy of the relative position between the right volute portion 220 of the volute and the right outer cover portion 210 of the fan housing is also high, and the assembly of the volute, the assembly of the fan housing and the connection of the volute and the fan housing can be simultaneously realized only by one assembly step for the left casing 100 and the right casing 200, the accuracy of the relative position between the volute and the fan housing is high, and the assembly steps are few, the accumulated assembly error is small, the position accuracy of the volute inside the fan housing is further improved, the air suction angle during the operation of the fan can be ensured, and the air suction effect and the air performance of the fan and the range hood. In addition, the assembly steps of the air suction device 10 are few, the processing difficulty can be effectively reduced, and the processing cost is reduced.

The collection petticoat pipe 20 is installed in the bottom of the device 10 that induced drafts, and collection petticoat pipe 20 is the intercommunication state with the fan dustcoat, when needing to use the lampblack absorber, opens drive assembly, and drive assembly drive impeller 500 rotates, is the negative pressure state in spiral case and the fan dustcoat, and outside oil smoke gas gets into collection petticoat pipe 20 under inside and outside pressure differential effect, and then gets into in the fan dustcoat to in the air intake flow spiral case through the spiral case, discharge at last.

The terms of orientation such as "left" and "right" are only based on the viewing angles in fig. 3 and 9, and are not related to the actual installation position of the range hood and are not limited.

Specifically, as shown in fig. 4, 7, 10-12, the left outer cover portion 110 may include a left side plate 111 and a left top plate located at an upper portion of the left side plate 111, and the left volute portion 120 is located in a left cavity formed by the left side plate 111 and the left top plate; the right housing portion 210 includes a right side plate 211 and a right top plate 212 located at the upper portion of the right side plate 211, the right volute portion 220 is located in a right cavity formed by the right side plate 211 and the right top plate 212, and after the left casing 100 is aligned and connected with the right casing 200, the air outlet of the volute is located on the top plate formed by the left top plate and the right top plate 212. Preferably, the check valve 30 can be communicated with the air outlet of the volute, and when the range hood is in a standby state, the check valve 30 can separate the inside of the range hood from the public flue so as to reduce secondary pollution to the kitchen caused by the oil smoke in the public flue being back-filled to the kitchen.

In this embodiment, as shown in fig. 7 and 11, a plurality of left engaging lugs may be disposed on left cover portion 110, a plurality of right engaging lugs 270 may be disposed on right cover portion 210, and the plurality of left engaging lugs and the plurality of right engaging lugs 270 may be detachably fixed in a one-to-one correspondence. Specifically, a connecting member such as a screw may be used to connect the left engaging lug and the right engaging lug 270 together.

In this embodiment, a first support frame 230 may be disposed on one of the left air inlet 121 of the left volute portion 120 and the right air inlet 221 of the right volute portion 220, a second support frame 130 may be disposed on the other, one end of the driving assembly is connected to the first support frame 230, and the other end of the driving assembly is connected to the second support frame 130. Here, the drive assembly is connected to the volute in a specific form, the left and right ends of the drive assembly are respectively supported by the first support frame 230 and the second support frame 130, the connection between the drive assembly and the volute is high, and the stability of the drive assembly driving the impeller 500 to rotate is also high.

Specifically, in the present embodiment, as shown in fig. 3, 9 and 11, the first support frame 230 may be disposed at the right air inlet 221, the second support frame 130 is disposed at the left air inlet 121, and the first support frame 230 is integrally formed with the right volute portion 220, and the second support frame 130 is integrally formed with the left volute portion 120. Here, the specific mounting positions of the first support frame 230 and the second support frame 130 are shown, the first support frame 230 is integrally formed with the right volute portion 220 and the right outer housing portion 210, the assembly steps are further reduced, and the position accuracy and the connection firmness of the first support frame 230 to the right volute portion 220 are higher; similarly, the second supporting frame 130 is integrally formed with the left volute portion 120 and the left outer cover portion 110, the assembling steps are further reduced, and the position accuracy and the connection firmness of the second supporting frame 130 connected to the left volute portion 120 are higher; correspondingly, the position precision and the firmness of the driving assembly connected to the volute are improved, and the running stability and the air performance of the fan are better.

In the connection between the first support frame 230 and the right volute portion 220 and the connection between the second support frame 130 and the left volute portion 120, only one of the two support frames may be integrally formed.

Optionally, in this embodiment, as shown in fig. 3, fig. 6, fig. 9, fig. 11 and fig. 12, a left air guiding ring 160 may be disposed around the left air inlet 121 of the left volute portion 120, the left air guiding ring 160, the left volute portion 120 and the second supporting frame 130 may be integrally formed, and when the soot gas flows through the left air inlet 121, the left air guiding ring 160 may guide the soot gas, so as to reduce vortex and noise pollution caused by an excessively large flow-type deflection angle of the soot gas. Similarly, a right air guiding ring 260 may be enclosed by the right air inlet 221 of the right volute portion 220, and the right air guiding ring 260 is integrally formed with the right volute portion 220 and the first support frame 230.

Alternatively, in this embodiment, as shown in fig. 2 to 7, the driving assembly may include an inner rotor motor 300, an outer shell of the inner rotor motor 300 includes a housing shell 311 and an end cover 312, the housing shell 311 is integrally formed with the first support frame 230, and an outer stator 320 of the inner rotor motor 300 is fixedly connected in the housing shell 311 as an insert when integrally formed; an inner rotor 330 of the inner rotor motor 300 is pivoted in the outer stator 320, an end cap 312 covers an opening end of the accommodating shell 311, one end of a rotating shaft 340 of the inner rotor motor 300 is fixedly connected with the inner rotor 330, the other end of the rotating shaft extends out of the end cap 312 and is pivoted with the second supporting frame 130, the impeller 500 is fixedly connected to a shaft body of the rotating shaft 340 extending out of the end cap 312, and specifically, a fixing cap 350 can be adopted to fix the position of the impeller 500 mounted on the rotating shaft 340. Here, it is a specific form of the driving assembly, wherein the accommodating case 311 of the inner rotor motor 300 is integrally formed with the first support frame 230, and in the forming process, the outer stator 320 is disposed in the accommodating case 311 as an insert, that is, the right outer cover portion 210, the right volute portion 220, the first support frame 230, the accommodating case 311 and the outer stator 320 are fixedly connected into a whole by integral forming, so as to realize connection of a plurality of components, and the plurality of components do not need to be assembled, so that the assembly error is further reduced, and the connection position precision and the connection firmness of the components are high; when the motor is installed, the rotating shaft 340 and the inner rotor 330 can be connected, then the inner rotor 330 is installed inside the outer stator 320 with the outer stator 320 as a reference, and then the end cover 312 is sealed at the opening end of the accommodating shell 311, so that the inner rotor 330 and the rotating shaft 340 are limited and protected; the impeller 500 is fixedly connected to the shaft body of the rotating shaft 340, and then the end part of the rotating shaft 340 is pivoted with the second supporting frame 130, wherein the second supporting frame 130 can limit the end part of the rotating shaft 340, so that the adverse effect of the jumping generated when the end part rotates on the stability of the impeller 500 is reduced, and the rotating stability of the impeller 500 is improved.

In addition to the inner rotor motor 300, in this embodiment, as shown in fig. 8-12, the driving assembly may also include an outer rotor motor 400, a housing of the outer rotor motor 400 is fixedly connected to the central disc 520 of the impeller 500, one end of the connecting shaft 440 of the outer rotor motor 400 is fixedly connected to the first supporting frame 230, and the other end is fixedly connected to the second supporting frame 130. Firstly, for convenience of distinction, the outer shell of the inner rotor motor 300 may be defined as a first outer shell 310, the outer shell of the outer rotor motor 400 may be defined as a second outer shell 410, the blades of the impeller 500 are arranged along the circumferential direction of the middle disc 520 to form a cylinder 510, the outer rotor motor 400 is located in the cylinder 510, the first support frame 230 and the second support frame 130 respectively support and fix the left and right ends of the connecting shaft 440, the inner stator 430 is fixed on the connecting shaft 440, and the outer rotor 420 can drive the second outer shell 410 to rotate synchronously with the outer shell when rotating, and drive the impeller 500 to rotate synchronously with the outer shell 410; compare in current fan, drive assembly generally installs in one of them air intake department of spiral case, cause great shutoff effect to this air intake, the drive assembly direct mount of this application is in the inside well dish 520 department of impeller 500, drive assembly is all less to the open-ended shutoff effect at impeller 500 both ends, it is also less to the shutoff of the air intake of spiral case both sides correspondingly, thereby ensure that the air intake of fan both sides all possesses the effect of induced drafting higher ground, improve the air performance of fan, it is relatively poor to reduce unilateral air intake induced draft effect, lead to the unbalanced and general air performance relatively poor condition of fan both sides air performance.

Specifically, in the present embodiment, the central disc 520 may be located at a midpoint position in the axial direction of the impeller 500, and the outer casing of the outer rotor motor 400 is symmetrically disposed about the central disc 520. Above-mentioned setting makes drive assembly be located the axial middle part position of impeller 500 to further reduce the drive assembly and to the emergence of the great condition of impeller 500 one side opening shutoff effect, the equilibrium of the effect of induced drafting of corresponding further improvement fan both sides, and improve the total air performance of fan. Accordingly, as shown in fig. 9, the blower may be installed in the middle region of the blower housing, the distance between the left air inlet 121 and the left housing portion 110 of the blower is L1, the distance between the right air inlet 221 and the right housing portion 210 of the blower is L2, and L1 is L2.

In this embodiment, as shown in fig. 4 and 10, a left noise reduction assembly may be disposed at a position of the left outer cover portion 110 corresponding to the left air inlet 121 of the left volute portion 120. The oil smoke gas flow is deflected angularly when entering the left air inlet 121 in the outer cover of the fan, contacts with the noise reduction assembly, and can be subjected to noise reduction treatment by the noise reduction assembly so as to reduce noise pollution generated when the fan operates. Specifically, the left noise reduction assembly may include a left noise reduction cover 140 with a noise reduction hole, an accommodating cavity is formed in the left noise reduction cover 140, left noise reduction cotton 150 is filled in the accommodating cavity, and the left noise reduction cotton 150 and the left noise reduction cover 140 can perform double noise reduction treatment on the oil smoke gas flow on the left side of the fan; a left mounting hole 112 may be formed at a position of the left side plate 111 corresponding to the left inlet opening 121, and the left noise reduction cover 140 may be fixedly coupled to the left mounting hole 112.

Similarly, a right noise reduction assembly may be disposed at a position of the right outer cover portion 210 corresponding to the right air inlet 221 of the right volute portion 220, and the right noise reduction assembly may perform noise reduction on the oil fume flowing to the right air inlet 221, so as to further reduce noise pollution generated by the operation of the fan. As shown in fig. 4 and 10, the right noise reduction assembly may be similar to the left noise reduction assembly, and includes a right noise reduction cover 240 with a noise reduction hole, an accommodating cavity is formed in the right noise reduction cover 240, right noise reduction cotton 250 is filled in the accommodating cavity, and the right noise reduction cotton 250 and the right noise reduction cover 240 can perform double noise reduction treatment on the oil fume flow on the right side of the fan; a right mounting hole 213 may be formed at a position of the right side plate 211 corresponding to the right inlet 221, and the right noise reduction cover 240 may be fixedly coupled to the right mounting hole 213.

Optionally, as shown in fig. 4 and 10, a protective shell 700 may be disposed around the blower housing, where the protective shell 700 may perform an isolation protection function on the noise reduction assembly, the blower, and the like; further, the periphery of the protective shell 700 can be provided with the decorative shell 800, and the decorative shell 800 can improve the appearance neatness of the range hood and improve the decorative performance of the range hood. Optionally, an oil filter screen 600 may be covered at the smoke inlet of the smoke collecting hood 20 to primarily filter and purify the smoke gas flow entering the range hood, reduce the pollution of oil stains to the internal components of the range hood, and reduce the purification load of the terminal purification device.

Specifically, the multiple parts can be integrally formed by die pressing or injection molding, the processing material can be SMC (Sheet molding compound) composite material or BMC (Bulk molding compound) material, and the fan housing and the volute prepared from the materials have the characteristics of high strength, high rigidity, high flame retardance, excellent thermal stability, excellent electrical property and the like, and the fan housing and the volute do not need to be subjected to rust prevention treatment, so that the processing technology of the range hood can be simplified, and the production cost is reduced.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Claims (10)

1. An air suction device is characterized by comprising a left shell (100) and a right shell (200), wherein the left shell (100) comprises a left outer cover part (110) and a left volute part (120), and the left volute part (120) is integrally formed with the left outer cover part (110); the right housing (200) comprises a right outer cover portion (210) and a right volute portion (220), and the right volute portion (220) is integrally formed with the right outer cover portion (210); the left outer cover part (110) and the right outer cover part (210) are correspondingly connected to form a fan outer cover, and the left volute part (120) and the right volute part (220) are correspondingly connected to form a volute;

the air suction device (10) further comprises a driving assembly and an impeller (500), wherein the impeller (500) is located in the volute, the driving assembly is installed in the volute, and the driving assembly is used for driving the impeller (500) to rotate.

2. The suction device according to claim 1, wherein one of the left inlet (121) of the left volute part (120) and the right inlet (221) of the right volute part (220) is provided with a first support frame (230), the other one is provided with a second support frame (130), one end of the driving assembly is connected to the first support frame (230), and the other end of the driving assembly is connected to the second support frame (130).

3. The suction device according to claim 2, wherein the first support frame (230) is provided at the right inlet (221), the second support frame (130) is provided at the left inlet (121), and the first support frame (230) is integrally formed with the right volute portion (220); and/or the second support frame (130) is integrally formed with the left volute part (120).

4. The suction device according to claim 2 or 3, wherein the driving assembly comprises an inner rotor motor (300), an outer shell of the inner rotor motor (300) comprises a containing shell (311) and an end cover (312), the containing shell (311) is integrally formed with the first support frame (230), and an outer stator (320) of the inner rotor motor (300) is fixedly connected in the containing shell (311) as an insert when the outer stator is integrally formed; the inner rotor (330) of the inner rotor motor (300) is pivoted in the outer stator (320), the end cover (312) is covered on the opening end of the accommodating shell (311), one end of the rotating shaft (340) of the inner rotor motor (300) is fixedly connected with the inner rotor (330), the other end of the rotating shaft extends out of the end cover (312) and the second supporting frame (130) is pivoted, and the impeller (500) is fixedly connected with the rotating shaft (340) extends out of the shaft body of the end cover (312).

5. The suction device according to claim 2 or 3, wherein the driving assembly comprises an outer rotor motor (400), a housing of the outer rotor motor (400) is fixedly connected with a central disc (520) of the impeller (500), one end of a connecting shaft (440) of the outer rotor motor (400) is fixedly connected with the first supporting frame (230), and the other end of the connecting shaft is fixedly connected with the second supporting frame (130).

6. The suction device according to claim 5, wherein the center plate (520) is located at a midpoint position in an axial direction of the impeller (500), and the outer rotor motor (400) has a housing symmetrically arranged about the center plate (520).

7. The air suction device according to any one of the claims 1 to 3, characterized in that a left noise reduction component is arranged at a position of the left outer cover part (110) corresponding to the left air inlet (121) of the left volute part (120);

and/or a right noise reduction component is arranged at the position of the right outer cover part (210) corresponding to the right air inlet (221) of the right volute part (220).

8. The air suction device according to any one of claims 1 to 3, characterized in that a left air guide ring (160) is surrounded by a left air inlet (121) of the left volute part (120); and/or a right air guide ring (260) is arranged around a right air inlet (221) of the right volute part (220).

9. The air suction device according to any one of claims 1 to 3, wherein the left cover part (110) is provided with a plurality of left connection lugs, the right cover part (210) is provided with a plurality of right connection lugs (270), and the plurality of left connection lugs and the plurality of right connection lugs (270) are detachably fixedly connected in a one-to-one correspondence mode.

10. A range hood, characterized by comprising a hood (20) and a suction device (10) according to any one of claims 1 to 9, the hood (20) being mounted at a bottom end of a fan housing of the suction device (10).

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