CN112856532A

CN112856532A - Volute assembly and range hood

Info

Publication number: CN112856532A
Application number: CN202110214357.XA
Authority: CN
Inventors: 刘宏俊; 庞江; 张兴平; 刘世文
Original assignee: Chinabest Home Appliances Co Ltd
Current assignee: Chinabest Home Appliances Co Ltd
Priority date: 2021-02-26
Filing date: 2021-02-26
Publication date: 2021-05-28

Abstract

The invention discloses a volute component and a range hood, wherein the range hood comprises the volute component, the volute component comprises a volute main body, a switching plate and a locking structure, a volute air channel and a volute air inlet are arranged in the volute main body, a wind wheel is arranged at the volute air inlet, the volute air channel is provided with a tail end air cavity, it is equipped with first gas outlet and second gas outlet along the direction of delivery of flue gas in proper order, first gas outlet sets up in the lateral wall in spiral case wind channel, the second gas outlet is located terminal air cavity, the switch board rotates to be connected in first gas outlet department, the spiral case main part is equipped with primary importance and second place, the switch board can rotate to primary importance in order to shutoff first gas outlet or rotate to the second place in order to relieve the shutoff to first gas outlet, the switch board can be with gas water conservancy diversion to first gas outlet and block it and get into terminal air cavity, locking structure can lock the switch board in primary importance or second place. The invention can facilitate the selection and switching of the discharge mode during installation and is beneficial to reducing the use noise.

Description

Volute assembly and range hood

Technical Field

The invention relates to the field of kitchen appliances, in particular to a volute component and a range hood.

Background

The range hood is a kitchen appliance for purifying the kitchen environment, and generally comprises a volute, a wind wheel component, a driver and the like, wherein the wind wheel component is arranged at an air inlet of the volute and is driven by the driver to rotate so as to suck smoke in the kitchen environment. The existing range hood has two kinds of discharge modes of top row and side row, for the convenience of different service environments, partial range hood can simultaneously set up the air exit of top row and side row on the spiral case, the existing spiral case, it is comparatively troublesome to carry out carminative installation switching to different air exits, and when the discharge mode of side row uses, partial gas in the spiral case wind channel is easily carried to the terminal air cavity that the air exit of top row is located, the spiral case wall that collides this terminal air cavity department forms the turbulent flow, cause the noise, influence range hood's use, reduce user's use travelling comfort.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the volute component provided by the invention is simple and reasonable in structure, can switch air outlet conditions of different air outlets by rotating the switching plate, is convenient for selection and switching of emission modes during installation, and is beneficial to reducing noise during use.

The invention also provides a range hood with the volute component.

The volute assembly according to the embodiment of the first aspect of the invention includes a volute main body, a switching plate and a locking structure, the volute main body is provided with a volute air duct and a volute air inlet communicated with the volute air duct, the volute air inlet is provided with a wind wheel, the volute air duct is provided with a terminal air cavity, the volute air duct is sequentially provided with a first air outlet and a second air outlet along a conveying direction of air, the first air outlet is arranged on a side wall of the volute air duct, the second air outlet is located at the terminal air cavity, the switching plate is rotatably connected to the volute main body and located at the first air outlet, the volute main body is provided with a first position and a second position, the switching plate can rotate to the first position and can block the first air outlet, and the switching plate can rotate to the second position to unblock the first air outlet, the switching plate can guide the air in the volute air channel to the first air outlet and can prevent the air in the volute air channel from entering the tail end air cavity, and the locking structure can lock the switching plate at the first position or the second position.

The volute assembly according to the embodiment of the invention has at least the following advantages: when the device is used, the first air outlet is correspondingly communicated with the air outlet of the side row, the second air outlet is correspondingly communicated with the air outlet of the top row, when the device is installed, the switching plate is rotated between the first position and the second position according to requirements, when the discharge mode of the side row is selected, the switching plate is rotated to the second position and is locked by the locking structure, the first air outlet is opened, the wind wheel is driven to rotate by the driver so as to suck smoke from the air inlet of the volute and convey the smoke along the air duct of the volute, because the first air outlet and the second air outlet are sequentially arranged along the air conveying direction of the air duct of the volute, the switching plate guides the air of the air duct of the volute to the first air outlet and simultaneously blocks the air of the air duct of the volute from entering the tail end air cavity, when the air of the air duct of the volute is conveyed to the first air outlet, the air is guided to the first air outlet by the switching plate and, thereby reducing noise; when the emission mode of top row is selected, the switching plate is rotated to the first position and is locked by the locking structure, the first air outlet is blocked, the second air outlet is opened, the wind wheel is driven by the driver to rotate, so that smoke is sucked from the volute air inlet and conveyed along the volute air channel, after the first air outlet is blocked by the switching plate, the gas can be conveyed to the tail end air cavity along the volute air channel and is discharged from the second air outlet, and because the first air outlet is arranged on the side wall of the volute air channel, the collision noise of the switching plate when the gas is conveyed along the volute air channel can be reduced, and the use is convenient. The air outlet switching device is simple and reasonable in structure, the air outlet conditions of different air outlets are switched by rotating the switching plate, the selection and switching of the discharge modes during installation are facilitated, the noise during use is reduced, and the use comfort of a user is improved.

According to some embodiments of the invention, the free end of the switching plate is provided with a volute tongue portion, and when the switching plate is located at the second position, a gap distance t is formed between the outer edge of the wind wheel and the volute tongue portion, and the gap distance t is configured to be t ═ 0.05-0.10) D, where D is the diameter of the outer edge of the wind wheel.

According to some embodiments of the invention, a side of the volute tongue part facing the first air outlet is provided with a circular arc structure, and a radius r of the circular arc structure is configured to be (0.03-0.06) D.

According to some embodiments of the invention, when the switch plate is located at the first position, the switch plate can be smoothly connected with the wall surface of the volute air duct.

According to some embodiments of the invention, the second air outlet is located at an upper side of the volute body, and the terminal air cavity is provided with a guiding curved surface capable of guiding the gas of the volute air duct to the second air outlet.

According to some embodiments of the present invention, the locking structure includes a locking bolt and a threaded portion disposed on the switching plate, the first position and the second position are both provided with a positioning hole for the locking bolt to pass through, and the locking bolt can pass through the positioning hole and be connected with the threaded portion.

According to some embodiments of the invention, a limiting protrusion is arranged on the volute main body, the limiting protrusion is located at the first position and/or the second position, and the limiting protrusion can limit the range of the rotation angle of the switching plate.

According to some embodiments of the invention, the volute body is connected with a casing of a range hood, the casing of the range hood is provided with a top air outlet and a side air outlet, the side air outlet is communicated with the first air outlet, the top air outlet is communicated with the second air outlet, the top air outlet is detachably connected with a sealing structure, and the sealing structure can block the top air outlet or unblock the top air outlet.

According to some embodiments of the invention, the sealing structure comprises a connecting pipe part and a sealing plate, the connecting pipe part is detachably connected to the range hood shell through a bolt and is positioned at the top air outlet, the sealing plate is detachably clamped to the range hood shell and is positioned between the range hood shell and the connecting pipe part, the connecting pipe part can press the sealing plate on the range hood shell, and the sealing plate can seal the top air outlet.

A range hood according to an embodiment of the second aspect of the present invention includes a volute assembly according to an embodiment of the first aspect of the present invention.

The range hood provided by the embodiment of the invention at least has the following beneficial effects: through adopting foretell spiral case subassembly, it can switch the condition of giving vent to anger of different gas outlets through rotating the switch board, and the selection of emission pattern switches when easy to assemble, and is favorable to reducing the noise when using, improves user's use travelling comfort.

Additional aspects and advantages of the invention 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 invention.

Drawings

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

FIG. 1 is a schematic view of a portion of a range hood according to an embodiment of the present invention;

FIG. 2 is an exploded view of the range hood of FIG. 1;

FIG. 3 is a schematic cross-sectional view of the range hood of FIG. 1;

FIG. 4 is an enlarged view of portion A of FIG. 3;

FIG. 5 is a schematic view of a portion of the volute assembly of FIG. 2;

FIG. 6 is a cross-sectional structural view of the volute assembly of FIG. 5;

FIG. 7 is a schematic bottom view of the volute assembly of FIG. 5;

FIG. 8 is a schematic top view of the volute assembly of FIG. 5;

FIG. 9 is an enlarged view of portion B of FIG. 8;

FIG. 10 is a schematic view of the volute assembly of FIG. 5 in another use configuration;

figure 11 is a top view schematic diagram of the volute assembly of figure 10.

Reference numerals:

the volute comprises a volute body 100, a first position 101, a second position 102, a volute air duct 110, a flow guide curved surface 111, a positioning hole 112, a limiting protrusion 113, a tail end air chamber 114, a volute air inlet 120, a wind wheel 130, a first air outlet 140, a second air outlet 150, a locking bolt 160, an activated carbon filter screen 170 and a flow guide inclined surface 180;

the switch board 200, the volute tongue part 210, the arc structure 211 and the handle part 220;

the range hood comprises a range hood shell 300, a top air outlet 301, a side air outlet 302, an inclined surface 303, a connecting pipe part 310, a rotating plate 311, a rotation limiting part 312, a sealing plate 320 and a clamping hook 321;

a driver 400.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that if an orientation description is referred to, for example, the directions of orientation or positional relationship indicated as up, down, etc. are based on the directions or positional relationships shown in the drawings, it is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, if several, more than, less than, more than, above, below, or within words appear, several means are one or more, several means are two or more, more than, less than, more than, etc. are understood as not including the number, and more than, less than, within, etc. are understood as including the number.

If the first and second are described for the purpose of distinguishing technical features, they are not to be understood 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 invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1, 2 and 8, a volute assembly includes a volute main body 100, a switching plate 200 and a locking structure, the volute main body 100 is provided with a volute air duct 110 and a volute air inlet 120 communicated with the volute air duct 110, the volute air inlet 120 is provided with a wind wheel 130, the volute air duct 110 has a terminal air cavity 114, the volute air duct 110 is sequentially provided with a first air outlet 140 and a second air outlet 150 along a conveying direction of air, the first air outlet 140 is disposed on a side wall of the volute air duct 110, the second air outlet 150 is located at the terminal air cavity 114, the switching plate 200 is rotatably connected to the volute main body 100 and located at the first air outlet 140, the volute main body 100 is provided with a first position 101 and a second position 102, the switching plate 200 can rotate to the first position 101 and can block the first air outlet 140, the switching plate 200 can rotate to the second position 102 to block the first air outlet 140, the switching plate 200 can guide the air of the volute air duct 110 to the first air outlet 140 and can block 110 enter the end air chamber 114 and the locking structure can lock the switch plate 200 in the first position 101 or the second position 102.

It can be understood that, as shown in fig. 2 and fig. 3, the volute air inlet 120 is disposed at the lower side of the volute main body 100, and the volute air inlet 120 is connected with an activated carbon filter screen 170 to filter the sucked flue gas, which is beneficial to preventing grease molecules from accumulating inside the volute main body 100 and is convenient to use; the wind wheel 130 is connected with a driver 400, the driver 400 can drive the wind wheel 130 to rotate so as to suck flue gas from the volute air inlet 120, the first air outlet 140 and the second air outlet 150 are sequentially arranged along the flue gas conveying direction of the volute air duct 110, the first air outlet 140 is arranged on the side wall of the volute air duct 110, and the second air outlet 150 is located in the terminal air chamber 114.

When the air distribution device is used, the first air outlet 140 is correspondingly communicated with the air outlet of the side row, the second air outlet 150 is correspondingly communicated with the air outlet of the top row, when the air distribution device is installed, the switching plate 200 is rotated between the first position 101 and the second position 102 as required, when the discharge mode of the side row is selected, as shown in fig. 5 and 8, the switching plate 200 is rotated to the second position 102 and is locked by the locking structure, the first air outlet 140 is opened, the wind wheel 130 is driven to rotate by the driver 400, so that the smoke is sucked from the volute air inlet 120 and is conveyed along the volute air channel 110, because the first air outlet 140 and the second air outlet 150 are sequentially arranged along the air conveying direction of the volute air channel 110, and when the switching plate 200 guides the air of the volute air channel 110 to the first air outlet 140, the air of the volute air channel 110 is simultaneously blocked from entering the tail end air cavity 114, therefore, when the air of the volute air channel 110 is conveyed to the, the gas is guided to the first gas outlet 140 by the switching plate 200 and is discharged, so that the possibility of turbulent flow generated when the gas enters the tail gas cavity 114 is reduced, and the noise is reduced;

when the top row discharge mode is selected, as shown in fig. 10 and 11, the switch plate 200 is rotated to the first position 101 and is locked by the locking structure, the switch plate 200 blocks the first air outlet 140, the second air outlet 150 is in an open state, the wind wheel 130 is driven by the driver 400 to rotate so as to suck the flue gas from the volute air inlet 120 and convey the flue gas along the volute air duct 110, after the switch plate 200 blocks the first air outlet 140, the flue gas is conveyed to the terminal air chamber 114 along the volute air duct 110 and is discharged from the second air outlet 150, and since the first air outlet 140 is disposed on the side wall of the volute air duct 110, the collision noise to the switch plate 200 when the gas is conveyed along the volute air duct 110 can be reduced, and the use is facilitated. The air outlet switching device is simple and reasonable in structure, the air outlet conditions of different air outlets are switched by rotating the switching plate 200, the selection and switching of the discharge mode during installation are facilitated, the noise during use is reduced, and the use comfort of a user is improved.

In practical application, one side of the switching plate 200 facing the first air outlet 140 may be configured as an arc-shaped curved surface structure, so as to guide the flue gas of the volute air duct 110 to the first air outlet 140, and simultaneously facilitate reducing the collision noise between the flue gas and the switching plate 200, the specific structure of the switching plate 200 may be set according to practical needs, and meanwhile, the locking structure may also be set correspondingly according to the specific situation of the switching plate 200, which is not described in detail herein, and is described in detail below.

In some embodiments, the free end of the switch plate 200 is provided with a volute tongue portion 210, and when the switch plate 200 is located at the second position 102, a gap distance t is provided between the outer edge of the wind wheel 130 and the volute tongue portion 210, and the gap distance t is configured to be (0.05-0.10) D, where D is the diameter of the outer edge of the wind wheel 130.

It can be understood that, as shown in fig. 5, 8, and 9, the free end of the switch plate 200 is provided with a volute tongue portion 210, so that when the switch plate 200 is located at the second position 102, the free end thereof forms a volute tongue structure for the first air outlet 140, which is beneficial to preventing the air in the volute air duct 110 from circulating in the volute, and reducing the possibility of the air entering the terminal air chamber 114. When the clearance distance t between the outer edge of the wind wheel 130 and the volute tongue portion 210 is configured to be t ═ 0.05-0.10D, the noise generation at the volute tongue portion 210 when the switching plate 200 is located at the second position 102 can be well reduced, the noise reduction during use is facilitated, and the use comfort of a user is improved. In this embodiment, the gap distance t is set to be 0.08D, and satisfies the relation t (0.05-0.10) D, and in practical application, the gap distance t may also be set to be 0.05D or 0.1D, and may be specifically set according to practical needs, and those skilled in the art should understand that the gap distance t may be set accordingly.

In some embodiments, the volute tongue portion 210 is provided with a circular arc structure 211 on a side facing the first air outlet 140, and a radius r of the circular arc structure 211 is configured to be (0.03-0.06) D.

It can be understood that, as shown in fig. 5, 8, and 9, when the radius r of the arc structure 211 is set to (0.03-0.06) D, the arc structure 211 is disposed on the side of the volute tongue portion 210 facing the first air outlet 140, which can further reduce the noise generated at the volute tongue portion 210 when the switch plate 200 is located at the second position 102, thereby being beneficial to reducing the noise during use and improving the comfort of the user. In this embodiment, the radius r is set to be 0.04D, and the relation r is (0.03-0.06) D, and when the radius r is actually applied, the radius r may also be set to be 0.03D or 0.06D, which may be set according to actual needs, and those skilled in the art should understand that the radius r is set accordingly.

In some embodiments, when the switch plate 200 is in the first position 101, the switch plate 200 can be smoothly connected to the wall of the volute duct 110.

It can be understood that, as shown in fig. 10 and 11, when the switch plate 200 is located at the first position 101, the switch plate 200 is substantially smoothly connected to the wall surface of the volute air duct 110, which can reduce the collision noise of the air to the switch plate 200 when the air is conveyed along the volute air duct 110, further reduce the noise during use, and improve the use comfort of the user. In practical application, one side of the switch plate 200 away from the first air outlet 140 may be set to be a curved surface structure capable of being smoothly connected with the wall surface of the volute air duct 110, so that when the switch plate 200 is located at the first position 101, the collision noise between the air and the switch plate 200 can be further reduced, and the specific structure of the switch plate 200 may be set according to actual use requirements, which is not described herein.

In some embodiments, the second air outlet 150 is located at the upper side of the volute body 100, and the end air chamber 114 is provided with a guiding curved surface 111, and the guiding curved surface 111 can guide the air in the volute air duct 110 to the second air outlet 150.

It can be understood that, as shown in fig. 2, 3 and 4, the second air outlet 150 is located at the upper side of the volute main body 100, the lower wall surface of the terminal air chamber 114 is provided with a flow guiding curved surface 111, the switching plate 200 is located at the first position 101, when the air in the volute air duct 110 is conveyed to the terminal air chamber 114, the air is output from the second air outlet 150 through the flow guiding effect of the flow guiding curved surface 111, because the second air outlet 150 is connected with the exhaust port of the top row, the air in the volute air duct 110 needs to deflect at a certain angle to be output at the second air outlet 150, and the arrangement of the flow guiding curved surface 111 can reduce the collision noise between the air and the wall surface of the terminal air chamber 114 when the air is conveyed to the second air outlet 150, thereby improving the. In practical applications, the specific structure of the guiding curved surface 111 may be set according to practical needs, and is not limited herein.

In some embodiments, the locking structure includes a locking bolt 160 and a threaded portion (not shown) disposed on the switching plate 200, the first position 101 and the second position 102 are respectively provided with a positioning hole 112 for the locking bolt 160 to pass through, and the locking bolt 160 can pass through the positioning hole 112 and be connected with the threaded portion.

It can be understood that, as shown in fig. 6, 7, 8 and 11, a handle 220 connected to the switching plate 200 is disposed at a lower side of the volute body 100 to facilitate a user to control the rotation of the switching plate 200 through the handle 220, positioning holes 112 are disposed at the first position 101 and the second position 102, and when the switching plate 200 rotates to the first position 101 or the second position 102, the locking bolt 160 penetrates through the positioning hole 112 and is connected to a threaded portion on the switching plate 200, so as to lock the position of the switching plate 200.

In practical application, the threaded portion may be a nut or a threaded hole disposed on the switch plate 200, and may be specifically set according to practical use requirements, which is not limited herein. Besides the above structure, the locking structure can also lock the position of the switch board 200 through the magnetic attraction structure, namely, the magnetic attraction piece is arranged on the switch board 200, the first position 101 and the second position 102 correspond to each other and are also provided with the magnetic attraction piece, so that the switch board 200 can be locked at the first position 101 or the second position 102 through the magnetic attraction effect, and meanwhile, the locking structure can also be a bolt structure arranged on the handle part 220, thereby fixing the position of the switch board 200 through inserting the bolt to fix the handle part 220, the locking structure can be specifically changed correspondingly according to the actual use needs, and the description is omitted.

In some embodiments, the volute body 100 is provided with a limiting protrusion 113, the limiting protrusion 113 is located at the first position 101 and/or the second position 102, and the limiting protrusion 113 can limit the rotation angle range of the switch plate 200.

It can be understood that, as shown in fig. 8 and 10, the second position 102 is provided with a limit protrusion 113, when the switch plate 200 rotates to the second position 102, the switch plate 200 abuts against the limit protrusion 113, so that the rotation angle range of the switch plate 200 is limited by the limit protrusion 113, and at the first position 101, the switch plate 200 can limit the rotation to the right position by abutting against the side wall of the volute duct 110 or by providing a step position, so as to improve the accuracy of the switch position of the switch plate 200, improve the reliability of the switch operation, and facilitate the use. In practical application, the first position 101 and the second position 102 may be both provided with a limiting protrusion 113, and the limiting protrusion 113 may be a bump structure or a strip-shaped protrusion structure, and may be specifically set according to practical use requirements, which is not limited herein.

In some embodiments, the volute body 100 is connected to a casing 300 of the range hood, the casing 300 of the range hood is provided with a top air outlet 301 and a side air outlet 302, the side air outlet 302 is communicated with the first air outlet 140, the top air outlet 301 is communicated with the second air outlet 150, the top air outlet 301 is detachably connected to a sealing structure, and the sealing structure can seal the top air outlet 301 or remove the sealing of the top air outlet 301.

It can be understood that, as shown in fig. 1, fig. 2 and fig. 3, the casing 300 of the range hood is covered on the main volute body 100, the upper side of the casing 300 of the range hood is provided with a top air outlet 301 communicated with the second air outlet 150, the side edge of the casing is provided with an inclined surface 303, one side of the inclined surface 303 far away from the top air outlet 301 is inclined downwards, the side air outlets 302 are provided with a plurality of air outlets and are positioned on the inclined surface 303, and the side air outlets 302 are communicated with the first air outlet 140, so that when the gas in the volute air duct 110 is output from the first air outlet 140, the gas can be discharged through the side air outlets 302 to form an upward airflow, which is beneficial to preventing the discharged gas from. Further, in order to facilitate the gas output from the first gas outlet 140 to be discharged from the side exhaust outlet 302, the flow guiding inclined plane 180 is further disposed between the first gas outlet 140 and the side exhaust outlet 302, so that the gas output from the first gas outlet 140 can be better conveyed to the side exhaust outlet 302 through the flow guiding inclined plane 180, the collision noise between the output gas and the volute body 100 is reduced, and the use comfort is improved.

As shown in fig. 1, 2 and 3, the top air outlet 301 is detachably connected with a sealing structure capable of sealing the top air outlet 301, when the gas is selected to be discharged through the first air outlet 140, the sealing structure is favorable for preventing foreign matters such as dust or mosquitoes and the like from entering the volute air duct 110 from the top air outlet 301, so that the use reliability of the present invention is improved, the service life is prolonged, and simultaneously, the sealing structure is favorable for sucking the gas at the second air outlet 150 to generate turbulence in the volute air duct 110 to generate noise, and the use comfort is improved; when the smoke is selected to be output through the second air outlet 150, the switching plate 200 is rotated to the first position 101, and the sealing structure is enabled to remove the blockage of the top air outlet 301, so that the exhaust use of the second air outlet 150 can be realized. In practical applications, the specific structure of the sealing structure can be set according to practical usage requirements, and will not be described in detail herein, and will be described in detail below.

In some embodiments, the sealing structure comprises a connecting tube portion 310 and a sealing plate 320, the connecting tube portion 310 is detachably connected to the cigarette machine housing 300 through bolts and is located at the top air outlet 301, the sealing plate 320 is detachably clamped to the cigarette machine housing 300 and is located between the cigarette machine housing 300 and the connecting tube portion 310, the connecting tube portion 310 can press the sealing plate 320 to the cigarette machine housing 300, and the sealing plate 320 can seal the top air outlet 301.

It can be understood that, as shown in fig. 1, fig. 2, fig. 3 and fig. 4, the sealing plate 320 is provided with a hook 321, the top air outlet 301 is provided with an avoiding notch (not shown) corresponding to the hook 321, the hook 321 is inserted into the top air outlet 301 through the avoiding notch, and then is rotated by a certain angle to clamp the hook 321 with the casing 300 of the range hood, the connecting pipe 310 is detachably connected to the casing 300 of the range hood through a bolt and presses the sealing plate 320 against the casing 300 of the range hood, so that the sealing plate 320 is fixed at the top air outlet 301 and seals the top air outlet 301; when the plugging is removed, the bolt is loosened to remove the pressing of the connecting pipe part 310 on the sealing plate 320, or the connecting pipe part 310 is detached, so that the hook 321 of the sealing plate 320 can rotate to the position avoiding the gap, the sealing plate 320 can be detached and separated from the shell 300 of the range hood, the plugging of the opposite-top air outlet 301 is removed, the structure is simple and reasonable, and the opposite-top air outlet 301 is stable and reliable in plugging, and is convenient to use.

Further, in order to prevent the foreign matters such as mosquitoes from entering the scroll duct 110 from the top exhaust outlet 301 when the gas is selectively exhausted through the second air outlet 150, as shown in fig. 1, 2, 3 and 4, two rotating plates 311 are rotatably connected in the tube of the connecting tube portion 310, each rotating plate 311 has a shape adapted to the inner semicircular shape of the connecting tube portion 310, so that the two rotating plates 311 can substantially block the inner channel of the connecting tube portion 310, a rotation limiting portion 312 is disposed in the tube of the connecting tube portion 310 below the rotating plate 311, the free end of the rotating plate 311 abuts against the rotation limiting portion 312 to limit the rotating direction of the rotating plate 311 through the rotation limiting portion 312, so that the rotating plate 311 can only rotate upwards to open, and at the same time, the two rotating plates 311 can better block the inner channel of the connecting tube portion 310, when the gas is selectively exhausted through the second air outlet 150, the sealing plate 320 is detached and taken down, the blocking of the top air outlet 301 is removed, air is output from the top air outlet 301 to the pipe channel of the connecting pipe part 310, the two rotating plates 311 are blown to rotate upwards and open respectively, so that the air in the volute air duct 110 can be discharged from the top air outlet 301, when the range hood stops working, the air output at the top air outlet 301 stops, the two rotating plates 311 rotate back under the action of gravity and abut against the rotation limiting parts 312 respectively, the pipe channel of the connecting pipe part 310 is shielded by the two rotating plates 311, foreign matters such as mosquitoes and the like are prevented from entering the volute air duct 110 from the top air outlet 301, the use reliability of the range hood is improved, and the service life is prolonged.

In practical applications, the specific structure of the sealing structure may also be changed according to practical needs, for example, the sealing plate 320 may be screwed to be detachably connected to the top air outlet 301, and the specific structure of the connecting pipe 310 may also be changed according to practical needs, and will not be described herein again.

A range hood according to a second aspect embodiment of the present invention, as shown in fig. 1 and 2, includes a volute assembly according to the above-described first aspect embodiment of the present invention.

According to the range hood provided by the embodiment of the invention, by adopting the volute component, the air outlet conditions of different air outlets can be switched by rotating the switching plate 200, so that the selection and switching of the discharge modes during installation are facilitated, the noise during use is reduced, and the use comfort of a user is improved.

Other components of the range hood according to the embodiments of the present invention are known to those skilled in the art and therefore will not be described in detail herein.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. A volute assembly, comprising:

the volute body (100) is internally provided with a volute air duct (110) and a volute air inlet (120) communicated with the volute air duct (110), a wind wheel (130) is arranged at the volute air inlet (120), the volute air duct (110) is provided with a tail end air cavity (114), the volute air duct (110) is sequentially provided with a first air outlet (140) and a second air outlet (150) along the conveying direction of gas, the first air outlet (140) is arranged on the side wall of the volute air duct (110), and the second air outlet (150) is positioned in the tail end air cavity (114);

the switching plate (200) is rotatably connected to the volute main body (100) and located at the first air outlet (140), the volute main body (100) is provided with a first position (101) and a second position (102), the switching plate (200) can rotate to the first position (101) and can block the first air outlet (140), the switching plate (200) can rotate to the second position (102) to unblock the first air outlet (140), and the switching plate (200) can guide the air in the volute air duct (110) to the first air outlet (140) and can block the air in the volute air duct (110) from entering the tail end air cavity (114);

a locking structure capable of locking the switch plate (200) in the first position (101) or the second position (102).

2. The volute assembly of claim 1,

the free end of the switching plate (200) is provided with a volute tongue portion (210), when the switching plate (200) is located at the second position (102), a gap distance t is formed between the outer edge of the wind wheel (130) and the volute tongue portion (210), and the gap distance t is configured to be t (0.05-0.10) D, wherein D is the diameter of the outer edge of the wind wheel (130).

3. The volute assembly of claim 2,

an arc structure (211) is arranged on one side of the volute tongue part (210) facing the first air outlet (140), and the radius r of the arc structure (211) is set to be (0.03-0.06) D.

4. The volute assembly of claim 2,

when the switching plate (200) is located at the first position (101), the switching plate (200) can be smoothly connected with the wall surface of the volute air duct (110).

5. The volute assembly of claim 2,

the second air outlet (150) is located on the upper side of the volute main body (100), the tail end air cavity (114) is provided with a flow guiding curved surface (111), and the flow guiding curved surface (111) can guide the air of the volute air duct (110) to the second air outlet (150).

6. The volute assembly of claim 1,

the locking structure comprises a locking bolt (160) and a thread portion arranged on the switching plate (200), positioning holes (112) for the locking bolt (160) to penetrate through are formed in the first position (101) and the second position (102), and the locking bolt (160) can penetrate through the positioning holes (112) and is connected with the thread portion.

7. The volute assembly of claim 1,

the volute body (100) is provided with a limiting protrusion (113), the limiting protrusion (113) is located at the first position (101) and/or the second position (102), and the limiting protrusion (113) can limit the range of the rotation angle of the switching plate (200).

8. The volute assembly of claim 1,

spiral case main part (100) are connected with cigarette machine casing (300), be equipped with top air exit (301) and side air exit (302) on cigarette machine casing (300), side air exit (302) with first gas outlet (140) intercommunication, top air exit (301) and second gas outlet (150) intercommunication, top air exit (301) department can dismantle and be connected with seal structure, seal structure can block up top air exit (301) or remove right top air exit (301) shutoff.

9. The volute assembly of claim 8,

sealing structure includes connecting tube portion (310) and sealing board (320), connecting tube portion (310) can dismantle through the bolt connect in cigarette machine casing (300) are located top air exit (301) department, seal board (320) can dismantle the joint in cigarette machine casing (300) are located cigarette machine casing (300) with between connecting tube portion (310), connecting tube portion (310) can with sealing board (320) press to be located cigarette machine casing (300), sealing board (320) can the shutoff top air exit (301).

10. A range hood comprising the volute assembly of any one of claims 1 to 9.