CN218936432U - Range hood capable of selectively exhausting air - Google Patents

Abstract

The utility model discloses a range hood capable of selectively exhausting air, which comprises: the main body of the cigarette machine is provided with an outer discharge channel and an inner discharge channel; the exhaust control device is arranged on the smoke machine main body and used for controlling the opening and closing of the inner exhaust channel and the opening and closing of the outer exhaust channel; the fan device is arranged in the tobacco machine main body; and the main control module is respectively and electrically connected with the exhaust control device and the fan device. When the range hood is installed, the main control module drives the exhaust control device to operate so as to enable the inner exhaust channel to be closed and the outer exhaust channel to be opened or enable the inner exhaust channel to be opened and the outer exhaust channel to be closed, and the range hood does not need to be disassembled to be adjusted, so that the range hood is convenient to install; when a user needs to switch the exhaust after the range hood is installed, the main control module drives the exhaust control device to operate again, so that the user can switch the exhaust mode conveniently.

Description

Range hood capable of selectively exhausting air

Technical Field

The utility model relates to the technical field of kitchen electricity, in particular to a range hood.

Background

In the prior art, some range hoods have an inner exhaust passage for exhausting air indoors and an outer exhaust passage for exhausting air outdoors to meet the requirements of air outer and inner exhaust. Before the range hood is installed, a user can select an inner exhaust or an outer exhaust according to the situation, then the range hood is disassembled, and a wind shield is installed in the range hood to seal a channel which does not need to be exhausted; when the exhaust needs to be switched afterwards, the range hood also needs to be disassembled to reinstall the wind guard. The operation of disassembling and installing the wind shield of the range hood is complicated, so that the operation of installing and switching the exhaust of the range hood is inconvenient.

Disclosure of Invention

The utility model aims to provide a range hood capable of selectively exhausting air, which can solve the following problems: the mounting of the range hood and the operation of switching the exhaust are inconvenient.

To achieve the above object, there is provided a range hood with selectable exhaust air, comprising: the main body of the cigarette machine is provided with an outer discharge channel and an inner discharge channel; the exhaust control device is arranged on the smoke machine main body and used for controlling the opening and closing of the inner exhaust channel and the opening and closing of the outer exhaust channel respectively; the fan device is arranged in the tobacco machine main body; and the main control module is respectively and electrically connected with the exhaust control device and the fan device.

According to the range hood capable of selectively exhausting, the exhaust control device comprises a first control mechanism and a second control mechanism, the first control mechanism is used for controlling the opening and closing of the outer exhaust channel, and the second control mechanism is used for controlling the opening and closing of the inner exhaust channel.

According to the range hood with the optional exhaust function, the first control mechanism comprises: the first mounting frame is connected with the cigarette machine main body; the first motor is arranged on the first mounting frame and is electrically connected with the main control module; the first middle connecting piece is connected with the rotating shaft of the first motor, and a first outer-row stop part and a second outer-row stop part are arranged on the side surface of the first middle connecting piece; a first baffle plate positioned at the end part of the outer row channel or in the outer row channel; the first connecting rod is respectively connected with the first middle connecting piece and the first baffle; the first limiting part is arranged on the first mounting frame or the shell of the first motor; one end of the tension spring piece is connected with the second outer-row stop part, and the other end of the tension spring piece is connected with the first mounting frame or the shell of the first motor; when the first outer-row stop part is displaced to the side abutting against the first limiting part, the first baffle is positioned at a position for closing the outer-row channel.

According to the range hood capable of selectively exhausting air, the range hood main body comprises: the box body shell is provided with a first mounting port at the bottom and the outer row channel at the top; the volute is positioned in the box body shell, the top of the volute is open and is connected with the inner top wall of the box body shell, so that the volute and the inner top wall of the box body shell enclose a wind cavity communicated with an outer discharge channel, and the bottom of the volute is provided with an air inlet; the housing is arranged on one side of the volute and forms an air channel with the inner wall of the housing shell; the inner row channel comprises a first air outlet formed in the side wall of the volute, a second air outlet formed in the surface of the casing shell and the air channel, and the first air outlet, the air channel and the second air outlet are sequentially communicated.

According to the range hood capable of selectively exhausting, two air inlets are formed in the bottom of the volute, a partition plate positioned between the two air inlets is arranged in the volute, the partition plate is positioned below the inlet end of the exhaust channel and at the first air outlet, the inner cavity of the volute is divided into two mounting cavities, and each mounting cavity is correspondingly provided with a fan device; when the first baffle is displaced to abut against the side wall of the partition plate, the first baffle is positioned at a position for opening the outer row channel.

According to the exhaust-selectable range hood, the second control mechanism comprises: the second motor is arranged on the volute and/or the housing and is electrically connected with the main control module; the second middle connecting piece is connected with the rotating shaft of the second motor and is provided with an inner row of stop parts on the side surface; the second baffle is positioned at the first air outlet; the second connecting rod is respectively connected with the second middle connecting piece and the second baffle; the second limiting part is arranged on a shell or a volute or a housing of the second motor; when the inner row stop part is displaced to one side abutting against the second limiting part, the second baffle is positioned at a position for sealing the inner row channel; when the second baffle is displaced to abut against the side wall of the partition plate or the inner row stop part is displaced to abut against one side of the third limiting part, the second baffle is positioned at a position for opening the inner row channel; the third limiting part is arranged on a shell or a volute or a housing of the second motor.

According to the range hood capable of selectively exhausting, the bottom of the box shell is provided with the oil collecting box, the oil guiding ring is arranged below the volute at the air inlet, the top surface of the oil guiding ring is concavely provided with the oil guiding groove which is arranged along the edge of the air inlet, the bottom of the volute is provided with the second skirt edge part which is connected with the edge of the air inlet and extends downwards, and an oil guiding channel is arranged between the oil guiding groove and the oil collecting box.

According to the range hood capable of selectively exhausting air, an electric heating structure is arranged on the outer side of the volute.

According to the range hood capable of selectively exhausting, the fan device is located in the air cavity and comprises a motor assembly and a wind wheel, the motor assembly is respectively connected with the box shell and the wind wheel, the axis of the wind wheel is vertically arranged, the wind wheel is located above the air inlet, the wind wheel is provided with a top ring, a cross flow blade and a bottom ring which are sequentially arranged from top to bottom, and longitudinal projections of the cross flow blade and the bottom ring are all located in the longitudinal projection of the oil guide groove.

According to the range hood with the optional exhaust function, the oil guide channel comprises: the oil guide port is arranged on the bottom surface of the oil guide groove; the mounting tube is fixedly connected with the oil guide ring, and the inner cavity of the oil guide pipe is communicated with the oil guide port; the oil guide pipe, the one end of oil guide pipe with the installation pipe box connects, and the other end extends to the top of a groove strip, the groove strip sets up in the top of collection oil box and connects the box shell, just the oil hole that falls has been seted up to the inner chamber bottom surface of groove strip.

The beneficial effects are that: when the range hood is installed, the main control module drives the exhaust control device to operate so as to enable the inner exhaust channel to be closed and the outer exhaust channel to be opened or enable the inner exhaust channel to be opened and the outer exhaust channel to be closed, and the range hood does not need to be disassembled to be adjusted, so that the range hood is convenient to install; when a user needs to switch the exhaust after the range hood is installed, the main control module drives the exhaust control device to operate again, so that the user can switch the exhaust mode conveniently.

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

Drawings

The utility model is further described below with reference to the drawings and examples;

FIG. 1 is a block diagram of an embodiment of the present utility model;

FIG. 2 is an exploded cross-sectional view of an embodiment of the present utility model;

FIG. 3 is a side cross-sectional view of an embodiment of the present utility model;

FIG. 4 is an exploded view of the first control mechanism;

FIG. 5 is a schematic view of a part of the structure of an embodiment of the present utility model;

FIG. 6 is an exploded cross-sectional view of a portion of the structure of an embodiment of the present utility model;

FIG. 7 is a cross-sectional view of the volute and oil guide passage;

fig. 8 is an enlarged view of a portion a shown in fig. 7;

FIG. 9 is a schematic diagram of the cooperation of a fan assembly with an oil guide ring;

fig. 10 is an electrical schematic of the present utility model.

Detailed Description

Reference will now be made in detail to the present embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present utility model, but not to limit the scope of the present utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, greater than, less than, exceeding, etc. are understood to exclude this number, and above, below, within, etc. are understood to include this number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

Referring to fig. 1 to 10, an exhaust hood for selective exhaust includes a hood main body 10, an exhaust control device, a fan device 40, and a main control module 50. The inside of the cigarette machine main body 10 is hollow, the cigarette machine main body 10 is provided with an outer exhaust channel 61 and an inner exhaust channel 62, an exhaust control device is arranged on the cigarette machine main body 10 and used for controlling the opening and closing of the inner exhaust channel 62 and the opening and closing of the outer exhaust channel 61 respectively, the fan device 40 is arranged in the cigarette machine main body 10, and the main control module 50 is electrically connected with the exhaust control device and the fan device 40 respectively.

When the range hood is installed, the main control module 50 drives the exhaust control device to operate, so that the inner exhaust channel 62 is closed and the outer exhaust channel 61 is opened, or the inner exhaust channel 62 is opened and the outer exhaust channel 61 is closed, and the range hood does not need to be disassembled for adjustment, so that the range hood is convenient to install. In addition, when the user needs to switch the exhaust after the range hood is installed, the main control module 50 can drive the exhaust control device to operate again, so that the user can switch the exhaust mode conveniently. Wherein, the exhaust control device controls the opening and closing of the inner exhaust channel 62 and the opening and closing of the outer exhaust channel 61 respectively, so that the opening and closing of the inner exhaust channel 62 and the opening and closing of the outer exhaust channel 61 can be independently carried out, the two channels are not interfered, and the installation and the exhaust switching adjustment are convenient.

In this embodiment, the smoke machine main body 10 includes a casing shell 11, a volute 12 and a housing 13, a first mounting opening is provided at the bottom of the casing shell 11, a filter screen 14 is provided in the first mounting opening, the top of the casing shell 11 is provided with the outer row channel 61, the volute 12 is located in the casing shell 11, the top of the volute 12 is open and is connected with the inner top wall of the casing shell 11, so that the volute 12 and the inner top wall of the casing shell 11 enclose an air cavity 15 communicating with the outer row channel 61, an air inlet 121 is provided at the bottom of the volute 12, the housing 13 is disposed at one side of the volute 12, and an air channel 622 is enclosed between the inner walls of the casing shell 11 of the housing 13. The inner row channel 62 includes a first air outlet 621 formed on a side wall of the volute 12, a second air outlet 623 formed on a surface of the casing 11, and an air duct 622, where the first air outlet 621, the air duct 622, and the second air outlet 623 are sequentially communicated.

In this embodiment, two air inlets 121 are provided at the bottom of the volute 12, a partition plate 16 located between the two air inlets 121 is disposed in the volute 12, the partition plate 16 is located below the inlet end of the outer row channel 61 and at the first air outlet 621, the inner cavity of the volute 12 is divided into two mounting cavities by the partition plate 16, a fan device 40 is correspondingly disposed in each mounting cavity, the top of each mounting cavity is communicated with the outer row channel 61, and the side of each mounting cavity is communicated with the first air outlet 621. The range hood can be arranged to enable the two fan devices 40 to operate alternatively or together, and when the two fan devices operate alternatively, the baffle 16 can play a role in guiding air, so that air flow is prevented from entering the installation cavity where the non-operating fan device 40 is positioned; when operated together, the baffle 16 prevents the mixing of the air streams generated by the two fan units 40 within the volute 12 from interfering with the flow of flue gas.

In this embodiment, the exhaust air control device includes a first control mechanism 20 and a second control mechanism 30, where the first control mechanism 20 is used to control the opening and closing of the outer exhaust channel 61, and the second control mechanism 30 is used to control the opening and closing of the inner exhaust channel 62.

The first control mechanism 20 includes a first mounting frame 21, a first motor 22, a first middle connector 23, a first baffle 24, a first connecting rod 25, a first limiting portion 26 and a tension spring member 27, the first mounting frame 21 is connected with the box shell 11, the first motor 22 is disposed on the first mounting frame 21 and electrically connected with the main control module 50, the first middle connector 23 is connected with a rotating shaft of the first motor 22, a first outer-row stop portion 231 and a second outer-row stop portion 232 are disposed on a side surface of the first middle connector 23, the first baffle 24 is located in an outer-row channel 61, the first connecting rod 25 is connected with the first middle connector 23 and the first baffle 24 respectively, the first limiting portion 26 is disposed on a shell of the first motor 22, one end of the tension spring member 27 is connected with a second outer-row stop portion 232, and the other end of the tension spring member 27 is connected with the shell of the first motor 22. When the first shutter 24 is displaced to abut against the side wall of the partition 16, the first shutter 24 is in a position to open the outer row passage 61; when the first outer stopper 231 is displaced to the side abutting against the first stopper 26, the first shutter 24 is in a position to close the outer passage 61.

Taking the example that the first baffle 24 is located at the initial position to close the outer row channel 61, when the main control module 50 controls the first motor 22 to be electrified, the first middle connector 23 and the first baffle 24 can be driven to rotate positively, the first outer row stop part 231 and the second outer row stop part 232 can also displace rotationally along with the first middle connector 23 and the first baffle 24, when the first baffle 24 rotates to a position of abutting against the side wall of the partition 16, the first baffle 24 is limited in displacement and stops rotating, at the moment, the first baffle 24 is located at a position of rotating to open to completely open the outer row channel 61, and the tension spring member 27 stretches the storage force; when the first motor 22 is powered off, the tension spring member 27 pulls the first middle connector 23 and the first baffle 24 to reversely rotate, and when the first outer-row stop portion 231 stops against one side of the first limit portion 26, the first middle connector 23 is limited in displacement and stops rotating, and at this time, the first baffle 24 is in a position where rotation is reset to close the outer-row channel 61. With the above structure, the first baffle 24 can be accurately stopped at the position for opening and closing the exhaust channel 61, thereby facilitating the exhaust and preventing the external air from flowing backward through the exhaust channel 61; and the position of the first baffle 24 can be detected without providing a limit switch or the like, so that the structure is simplified.

In some embodiments, the first baffle 24 may also be located at an end of the outer row of channels 61. In addition, the first limiting portion 26 may be further disposed on the first mounting frame 21, and the other end of the tension spring member 27 may also be connected to the first mounting frame 21.

In this embodiment, the second control mechanism 30 includes a second motor 31, a second middle connector 32, a second baffle 33, a second connecting rod 34 and a second limiting portion 35, the second motor 31 is connected with the volute 12 and the housing 13 at the same time, the second motor 31 is electrically connected with the main control module 50, the second middle connector 32 is connected with a rotating shaft of the second motor 31, an inner row of stop portions 321 are disposed on a side surface of the second middle connector 32, the second baffle 33 is located at the first air outlet 621, the second connecting rod 34 is connected with the second middle connector 32 and the second baffle 33 respectively, the second limiting portion 35 is disposed on a housing of the second motor 31, and a third limiting portion 36 is further disposed on the housing of the second motor 31. When the inner row stop portion 321 is displaced to a side abutting against the second limiting portion 35, the second baffle 33 is in a position closing the inner row passage 62; when the inner row stopper 321 is displaced to the side abutting against the third stopper 36, the second shutter 33 is in a position to open the inner row passage 62.

The second baffle 33 can close the first air outlet 621 when being positioned at the initial position, and further can close the inner row channels 62. Taking the case that the second baffle 33 is located at the initial position to close the inner row channel 62 as an example, when the main control module 50 controls the second motor 31 to be electrified, the second middle connector 32 and the second baffle 33 can be driven to rotate positively, the inner row stop portion 321 can also displace rotationally, when the inner row stop portion 321 rotates to a position of stopping one side of the third stop portion 36, the second middle connector 32 and the second baffle 33 are limited in displacement and stop rotating, and at the moment, the second baffle 33 is located at a position of rotating to open so as to completely open the inner row channel 62; when the second motor 31 drives the second intermediate connector 32 and the second baffle 33 to rotate reversely, the second intermediate connector 32 and the second baffle 33 rotate reversely, and when the inner row stop portion 321 abuts against one side of the second limit portion 35, the second intermediate connector 32 is limited in displacement and stops rotating, and at the moment, the second baffle 33 is in a position where rotation is reset to close the inner row channel 62. With the above structure, the second baffle 33 can be accurately stopped at the position where the inner discharge passage 62 is opened and closed, thereby facilitating the exhaust and preventing the backflow of the external air; and the position of the second shutter 33 can be detected without providing a limit switch or the like, so that the structure can be simplified.

In some embodiments, the second motor 31 may be connected only with one of the volute 12 and the housing 13. The second limiting portion 35 and the third limiting portion 36 may also be disposed on the volute 12 or the housing 13.

In some embodiments, the third stopper 36 may not be provided, wherein when the second shutter 33 is displaced to abut against the side wall of the partition 16, the displacement of the second intermediate link 32 and the second shutter 33 is restricted and the rotation is stopped, and at this time the second shutter 33 is in a position to be rotated open to fully open the inner row passage 62.

In the present embodiment, the bottom of the casing 11 is provided with an oil collecting box 71, an oil guiding ring 72 is disposed below the volute 12 at the air inlet 121, an oil guiding groove 721 disposed along the edge of the air inlet 121 is concavely disposed on the top surface of the oil guiding ring 72, the bottom of the volute 12 has a second skirt portion 122 connected to the edge of the air inlet 121 and extending downward, and an oil guiding channel 73 is disposed between the oil guiding groove 721 and the oil collecting box 71. With the above structure, the oil stain in the volute 12 flows to the air inlet 121, then falls into the oil guide groove 721 along the inner wall of the second skirt portion 122, and is guided into the oil collecting box 71 to be collected through the oil guide channel 73, so that secondary pollution in the range hood caused by the fact that the oil stain in the volute 12 flows to the filter screen 14 and the like can be avoided, the clean workload of a user is reduced, and the use experience of the user is optimized.

In this embodiment, the oil guiding channel 73 includes an oil guiding port 731, an installation tube 732, and an oil guiding tube 733, the oil guiding port 731 is disposed on the bottom surface of the oil guiding groove 721, the installation tube 732 is fixedly connected with the oil guiding ring 72, the inner cavity of the oil guiding tube 733 is communicated with the oil guiding port 731, one end of the oil guiding tube 733 is sleeved with the installation tube 732, the other end extends to the upper side of a groove 734, the groove 734 is disposed above the oil collecting box 71 and is connected with the box shell 11, and the bottom surface of the inner cavity of the groove 734 is provided with an oil dropping hole 7341. The oil dirt in the oil guide groove 721 flows through the oil guide port 731, the mounting pipe 732, the oil guide pipe 733, and the groove 734 in this order, and finally flows into the oil collecting case 71.

In some embodiments, the oil guide pipe 733 may be directly inserted into the oil guide port 731.

In the present embodiment, the outer side surface of the scroll casing 12 is provided with an electrothermal structure. Wherein, the electric heating structure can be arranged as an electric heating plate, an electric heating wire, etc. When the interior of the volute 12 needs to be cleaned, the volute 12 is heated by the electric heating structure, so that the condensed oil in the volute 12 is melted, and the oil dirt formed by melting can flow to the oil guide groove 721 and is finally collected by the oil collecting box 71.

In this embodiment, the fan device 40 includes a motor assembly 41 and a wind wheel 42, the motor assembly 41 is respectively connected with the box shell 11 and the wind wheel 42, the motor assembly 41 is electrically connected with the main control module 50, the axis of the wind wheel 42 is vertically arranged, the wind wheel 42 has a top ring 43, through-flow blades 44 and a bottom ring 45 which are sequentially arranged from top to bottom, the through-flow blades 44 are arranged in a plurality and are arranged in a ring shape, the through-flow blades 44 are respectively connected with the top ring 43 and the bottom ring 45, and the longitudinal projections of the through-flow blades 44 and the bottom ring 45 are all located in the longitudinal projection of the oil guide groove 721. In operation, the motor assembly 41 drives the wind wheel 42 to rotate around a vertical axis, the flue gas passes through the filter screen 14 and the air inlet 121 to enter the wind cavity 15, and the oil dirt adhered on the wind wheel 42 is thrown to the inner side wall of the volute 12 and then flows to the oil guide groove 721; the electric heating structure can melt the condensed oil on the wind wheel 42 when heating, and the melted oil dirt flows downwards along the through-flow blades 44 and the bottom ring 45 and drops to the oil guide groove 721, so that the oil dirt on the wind wheel 42 can be guided and collected to the oil collecting box 71. In addition, the motor assembly 41 is connected with the housing 11, so that the bearing of the scroll casing 12 can be reduced, the structure of the scroll casing 12 is simplified, the scroll casing 12 is easy to manufacture, and the manufacturing cost is low.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.

Claims (10)

1. A range hood with selectable exhaust air, comprising:

the main body of the cigarette machine is provided with an outer discharge channel and an inner discharge channel;

the exhaust control device is arranged on the smoke machine main body and used for controlling the opening and closing of the inner exhaust channel and the opening and closing of the outer exhaust channel respectively;

the fan device is arranged in the tobacco machine main body;

and the main control module is respectively and electrically connected with the exhaust control device and the fan device.

2. The range hood with selectable exhaust air according to claim 1, wherein the exhaust air control device comprises a first control mechanism and a second control mechanism, the first control mechanism is used for controlling the opening and closing of the outer exhaust channel, and the second control mechanism is used for controlling the opening and closing of the inner exhaust channel.

3. The extractor hood of claim 2 wherein said first control mechanism includes:

the first mounting frame is connected with the cigarette machine main body;

the first motor is arranged on the first mounting frame and is electrically connected with the main control module;

the first middle connecting piece is connected with the rotating shaft of the first motor, and a first outer-row stop part and a second outer-row stop part are arranged on the side surface of the first middle connecting piece;

a first baffle plate positioned at the end part of the outer row channel or in the outer row channel;

the first connecting rod is respectively connected with the first middle connecting piece and the first baffle;

the first limiting part is arranged on the first mounting frame or the shell of the first motor;

one end of the tension spring piece is connected with the second outer-row stop part, and the other end of the tension spring piece is connected with the first mounting frame or the shell of the first motor;

when the first outer-row stop part is displaced to the side abutting against the first limiting part, the first baffle is positioned at a position for closing the outer-row channel.

4. A range hood with selectable exhaust air according to claim 3, wherein said hood body comprises:

the box body shell is provided with a first mounting port at the bottom and the outer row channel at the top;

the volute is positioned in the box body shell, the top of the volute is open and is connected with the inner top wall of the box body shell, so that the volute and the inner top wall of the box body shell enclose a wind cavity communicated with an outer discharge channel, and the bottom of the volute is provided with an air inlet;

the housing is arranged on one side of the volute and forms an air channel with the inner wall of the housing shell;

the inner row channel comprises a first air outlet formed in the side wall of the volute, a second air outlet formed in the surface of the casing shell and the air channel, and the first air outlet, the air channel and the second air outlet are sequentially communicated.

5. The range hood with the air exhaust function according to claim 4, wherein two air inlets are formed in the bottom of the volute, a partition plate positioned between the two air inlets is arranged in the volute, the partition plate is positioned below the inlet end of the outer exhaust channel and at the first air outlet, the inner cavity of the volute is divided into two mounting cavities, and each mounting cavity is correspondingly provided with a fan device;

when the first baffle is displaced to abut against the side wall of the partition plate, the first baffle is positioned at a position for opening the outer row channel.

6. The extractor hood of claim 5 wherein said second control mechanism includes:

the second motor is arranged on the volute and/or the housing and is electrically connected with the main control module;

the second middle connecting piece is connected with the rotating shaft of the second motor and is provided with an inner row of stop parts on the side surface;

the second baffle is positioned at the first air outlet;

the second connecting rod is respectively connected with the second middle connecting piece and the second baffle;

the second limiting part is arranged on a shell or a volute or a housing of the second motor;

when the inner row stop part is displaced to one side abutting against the second limiting part, the second baffle is positioned at a position for sealing the inner row channel;

when the second baffle is displaced to abut against the side wall of the partition plate or the inner row stop part is displaced to abut against one side of the third limiting part, the second baffle is positioned at a position for opening the inner row channel;

the third limiting part is arranged on a shell or a volute or a housing of the second motor.

7. The range hood with optional exhaust air according to claim 4, wherein the bottom of the housing is provided with an oil collecting box, an oil guiding ring is arranged below the volute at the air inlet, an oil guiding groove arranged along the edge of the air inlet is concavely arranged on the top surface of the oil guiding ring, the bottom of the volute is provided with a second skirt edge part connected with the edge of the air inlet and extending downwards, and an oil guiding channel is arranged between the oil guiding groove and the oil collecting box.

8. The range hood with optional exhaust according to claim 7, wherein an electrothermal structure is disposed outside the volute.

9. The range hood with the air exhaust function according to claim 8, wherein the fan device is located in the air cavity and comprises a motor assembly and a wind wheel, the motor assembly is respectively connected with the box shell and the wind wheel, the axis of the wind wheel is vertically arranged, the wind wheel is located above the air inlet, the wind wheel is provided with a top ring, a through-flow blade and a bottom ring which are sequentially arranged from top to bottom, and the longitudinal projections of the through-flow blade and the bottom ring are all located in the longitudinal projection of the oil guide groove.

10. The range hood of claim 7 wherein said oil routing channel comprises:

the oil guide port is arranged on the bottom surface of the oil guide groove;

the mounting tube is fixedly connected with the oil guide ring, and the inner cavity of the oil guide tube is communicated with the oil guide port;

the oil guide pipe, the one end of oil guide pipe with the installation pipe box connects, and the other end extends to the top of a groove strip, the groove strip sets up in the top of collection oil box and connects the box shell, just the oil hole that falls has been seted up to the inner chamber bottom surface of groove strip.

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