CN111336570A

CN111336570A - Fume exhaust fan

Info

Publication number: CN111336570A
Application number: CN202010329883.6A
Authority: CN
Inventors: 任富佳; 陈志涛; 周天宇; 郁明跃; 余国成; 吕春明
Original assignee: Hangzhou Robam Appliances Co Ltd
Current assignee: Hangzhou Robam Appliances Co Ltd
Priority date: 2020-04-23
Filing date: 2020-04-23
Publication date: 2020-06-26

Abstract

The invention provides a range hood, and relates to the technical field of kitchen appliances. The range hood comprises a smoke collecting hood and a smoke guide plate, wherein a smoke collecting panel of the smoke collecting hood is provided with a smoke inlet, and the smoke guide plate is positioned outside the smoke inlet and corresponds to the smoke inlet; the left side area of the inner wall of the smoke guide plate is rotatably connected with a left supporting arm, the right side area of the inner wall of the smoke guide plate is rotatably connected with a right supporting arm, the smoke collecting hood is provided with a driving device, a driving end of the driving device is connected with the left supporting arm and the right supporting arm and used for driving the left supporting arm and the right supporting arm to perform telescopic motion, and the smoke guide plate rotates relative to the smoke collecting panel under the telescopic action of the left supporting arm and the right supporting arm to form a left smoke collecting cavity and/or a right smoke collecting cavity with the smoke. This lampblack absorber can be adjusted the form that leads the cigarette board to form to hold together the cigarette chamber according to the in service behavior of user to the furnace end, makes its suction intensity when culinary art to single furnace end strengthen greatly, correspondingly improves the suction effect of lampblack absorber to single furnace end culinary art.

Description

Fume exhaust fan

Technical Field

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

Background

The range hood is an electrical appliance widely applied to a kitchen, and mainly comprises a top-suction range hood and a side-suction range hood according to the position arrangement of a smoke inlet, wherein the smoke inlet of the side-suction range hood is arranged at the side part of a smoke collecting hood; two furnace ends about current cooking utensils generally are provided with, and in the in-service use, the user often only uses one of them furnace end to cook, and hold together the cigarette scope of holding together the cigarette chamber and relate to two furnace ends simultaneously, lead to the suction dispersion of lampblack absorber, and is relatively poor to the suction effect of single furnace end culinary art.

Disclosure of Invention

The invention aims to provide a range hood to solve the technical problem that in the prior art, the range hood has poor suction effect on cooking of a single burner.

The embodiment provides a range hood, which comprises a smoke collecting hood and a smoke guide plate, wherein a smoke collecting panel of the smoke collecting hood is provided with a smoke inlet, and the smoke guide plate is positioned outside the smoke inlet and corresponds to the smoke inlet; the smoke guide plate is characterized in that a left supporting arm is rotatably connected to the left side area of the inner wall of the smoke guide plate, a right supporting arm is rotatably connected to the right side area of the inner wall of the smoke guide plate, a driving device is mounted on the smoke collection hood, the driving end of the driving device is connected with the left supporting arm and the right supporting arm and used for driving the left supporting arm and the right supporting arm to perform telescopic motion, the smoke guide plate rotates relative to the smoke collection panel under the telescopic action of the left supporting arm and the right supporting arm, and a left smoke collection cavity and/or a right smoke collection cavity are/is formed by the smoke guide.

In an alternative embodiment, the left support arm and the right support arm both extend towards the outside of the smoke collection panel, a left guide rail is fixedly arranged on the left side area of the smoke collection hood, and the left support arm is connected with the left guide rail in a sliding mode along the length direction of the left guide rail; the right side area of the smoke collecting cover is fixedly provided with a right guide rail, and the right supporting arm is connected with the right guide rail in a sliding mode along the length direction of the right guide rail.

In an alternative embodiment, the driving device comprises a telescopic driving component, a connecting arm and a limiting arm, one end of the connecting arm is hinged to the left supporting arm, the other end of the connecting arm is hinged to the right supporting arm, and the left supporting arm, the smoke guide plate, the right supporting arm and the connecting arm together form a parallelogram link mechanism; one end of the limiting arm is fixedly connected with the smoke collecting cover, and the other end of the limiting arm is pivoted to the connecting arm;

the driving end of the telescopic driving component is connected with the left supporting arm and used for driving the left supporting arm to slide along the left guide rail in a reciprocating mode; or the driving end of the telescopic driving component is connected with the right supporting arm and used for driving the right supporting arm to slide along the right guide rail in a reciprocating mode.

In an optional embodiment, the pivot joint of the limiting arm and the connecting arm is located at the middle position of the connecting arm in the length direction.

In an optional embodiment, a plug connector is arranged at one end of the limiting arm facing the connecting arm, the connecting arm is provided with a plug groove, and the plug connector is plugged in the plug groove.

In an alternative embodiment, the angle between the smoke guide plate and the smoke collection panel is in the range of 0 ° to 8 °.

In an optional embodiment, one end of the left supporting arm, which faces the smoke guide plate, is provided with a left insertion cylinder with an upward opening, the inner wall of the smoke guide plate is provided with a left insertion shaft, and the left insertion shaft is inserted into the left insertion cylinder from top to bottom; one end of the right supporting arm, which faces the smoke guide plate, is provided with a right insertion cylinder with an upward opening, the inner wall of the smoke guide plate is provided with a right insertion shaft, and the right insertion shaft is inserted into the right insertion cylinder from top to bottom;

or a left insertion shaft is arranged at one end, facing the smoke guide plate, of the left supporting arm, a left insertion cylinder with a downward opening is arranged on the inner wall of the smoke guide plate, and the left insertion shaft is inserted into the left insertion cylinder from bottom to top; the end, facing the smoke guide plate, of the right supporting arm is provided with a right inserting shaft, the inner wall of the smoke guide plate is provided with a right inserting cylinder with a downward opening, and the right inserting shaft is inserted into the right inserting cylinder from bottom to top.

In an alternative embodiment, a connecting plate is glued to the inner wall of the smoke guide plate, and the left supporting arm and the right supporting arm are hinged to the connecting plate.

In an alternative embodiment, the smoke guide plate is an integrally formed plate body.

In an optional embodiment, an oil collecting box is detachably and fixedly arranged at the bottom of the fume collecting hood.

In an optional embodiment, the fume collecting hood is provided with a flow guiding assembly, and the flow guiding assembly is located between the fume collecting box and the fume guiding plate and is used for guiding the oil stains dripped by the fume guiding plate into the fume collecting box.

The range hood of the invention has the beneficial effects that:

the invention provides a range hood which comprises a smoke collecting cover, a smoke guide plate, a driving device, a left supporting arm and a right supporting arm, wherein a smoke collecting cavity is formed inside the smoke collecting cover and can be used for installing components and containing oil smoke gas, the smoke guide plate is used for plugging a smoke inlet of the smoke collecting cover or forming a smoke collecting cavity together with a smoke collecting panel, the driving device is used for driving the smoke guide plate to move, and the left supporting arm and the right supporting arm are connected between the driving device and the smoke guide plate and serve as linkage parts.

The left supporting arm and the right supporting arm are respectively connected with the left portion and the right portion of the smoke guide plate in a rotating mode, the left supporting arm and the right supporting arm can extend out of the smoke collection panel or retract into the smoke collection cavity under the driving effect of the driving device, the length of the left supporting arm and the length of the right supporting arm extending out of the smoke collection panel directly determine the distance between the left rotating connection portion and the right rotating connection portion of the smoke guide plate and the smoke collection panel, and accordingly the included angle formed between the left direction and the right direction of the smoke guide plate and the smoke collection panel can be determined, namely the size of the smoke collection cavity. Specifically, when need not to use the lampblack absorber, the smoke deflector can be located the optional position, and preferably, drive arrangement can drive left supporting arm and right supporting arm all towards the withdrawal of collection smoke chamber, and the corresponding collection smoke panel that moves of orientation of smoke deflector is moved until smoke deflector shutoff in the smoke inlet department of collection smoke panel, and at this moment, smoke deflector separates collection smoke chamber and lampblack absorber outside and keeps off into two relatively independent spaces to reduce the secondary pollution that the interior oil smoke of public flue caused the kitchen to the kitchen through collection smoke chamber recharge. When a user cooks two burners to generate oil smoke, the driving device can be controlled to drive the left supporting arm and the right supporting arm to extend outwards, the smoke guide plate correspondingly moves outwards, gaps are reserved between the left side and the right side of the smoke guide plate and the smoke collection panel, correspondingly, a plate body in the left side area of the smoke guide plate and the smoke collection panel form a left smoke collection cavity, the position of the left smoke collection cavity corresponds to the position of the left burner up and down, oil smoke gas generated by the left burner can flow into the left smoke collection cavity through an opening in the left side of the left smoke collection cavity, then flows into the smoke collection cavity through the smoke inlet, and then is conveyed to the common flue; simultaneously, the regional plate body in smoke deflector right side forms the right side with collection cigarette panel and holds together the cigarette chamber, and the position that holds together the cigarette chamber in the right side is corresponding from top to bottom with the position of right furnace end, and the oil smoke gas that right furnace end produced can flow into the right side through the opening that the right side held together the cigarette chamber right side and hold together the cigarette intracavity, and then flows into collection cigarette intracavity through advancing the mouth of cigarette, is carried to public flue afterwards.

When a user cooks the left burner to generate oil smoke, the driving device can be controlled to drive the left supporting arm to extend outwards, the left side of the smoke guide plate is forced to rotate outwards, and a left smoke collecting cavity is formed between the smoke guide plate and the smoke collecting panel (in the process, the driving device can be controlled to drive the right supporting arm to extend outwards for a certain distance according to actual conditions so as to reduce interference between a right plate body and the smoke collecting panel in the rotation process of the smoke guide plate); in addition, form the effective storehouse that presss from both sides that the opening is towards the left between smoke deflector and the collection cigarette panel, can carry out the shutoff to the right side to reduce and get into the left outside escape volume of the oil smoke gas that holds together in the cigarette chamber, further improve the suction effect of lampblack absorber to left furnace end department oil smoke gas. Similarly, when a user cooks and generates oil smoke by only using the right furnace end, the driving device can be controlled to drive the right supporting arm to extend outwards, the right side of the smoke guide plate is stressed to rotate outwards to form a right smoke collecting cavity with the smoke collecting panel, at the moment, the smoke guide plate seals the left area of the smoke inlet, and the smoke collecting cavity is also effectively enhanced in the suction effect of oil smoke gas at the right furnace end through the right smoke collecting cavity. In addition, the user can also control the extending distance of the left supporting arm or the right supporting arm according to the amount of oil smoke generated by cooking so as to adjust the opening size of the smoke collecting cavity and correspondingly adjust the suction strength of the smoke collecting cavity to the oil smoke gas at the corresponding furnace end.

That is, this lampblack absorber can be adjusted the form that leads the cigarette board to form and hold together the cigarette chamber according to the in service behavior of user to the furnace end, makes its suction intensity when culinary art to single furnace end strengthen greatly, correspondingly improves the suction effect of lampblack absorber to single furnace end culinary art.

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 description of the embodiments or 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 other drawings can be obtained by those skilled in the art without creative efforts.

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

fig. 2 is a left side view of the range hood according to the embodiment of the present invention, wherein the smoke guide plate is approximately parallel to the smoke collection panel;

fig. 3 is a first state top view of the range hood provided by the embodiment of the present invention, wherein the smoke guide plate and the smoke collection panel form a left smoke collection chamber;

fig. 4 is a second state top view of the range hood provided in the embodiment of the present invention, wherein the smoke guide plate and the smoke collection panel form a right smoke collection chamber;

fig. 5 is a schematic view of a smoke guide plate in the range hood according to the embodiment of the present invention connected to a driving device through a left support arm and a right support arm;

FIG. 6 is a top view of the smoke guide plate of FIG. 5 showing the connection between the left and right support arms and the driving device;

fig. 7 is a schematic view of the connection of the smoke guide plate, the left support arm, and the right support arm to the driving device in fig. 6.

Icon: 100-a smoke collecting hood; 110-a smoke collecting panel; 120-a smoke inlet; 130-left cigarette collecting cavity; 140-right cigarette collecting cavity; 200-a smoke guide plate; 210-left plug shaft; 220-right plug-in shaft; 230-a connecting plate; 310-a left support arm; 311-left plug-in cartridge; 320-right support arm; 321-right plug-in cylinder; 330-right guide rail; 400-a drive device; 410-a telescopic drive assembly; 420-a linker arm; 430-a spacing arm; 500-oil collecting box; 510-a flow directing assembly; 600-a fan housing; 700-blower.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the 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 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 figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within 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 orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally laid out when products of the present invention are used, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

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 and may, for example, be fixedly connected, detachably connected, or integrally connected; 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the invention are 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 a range hood, as shown in fig. 1-6, including a smoke collecting hood 100 and a smoke guide plate 200, wherein a smoke collecting panel 110 of the smoke collecting hood 100 is provided with a smoke inlet 120, and the smoke guide plate 200 is located outside the smoke inlet 120 and corresponds to the smoke inlet 120; the left side area of the inner wall of the smoke guide plate 200 is rotatably connected with a left support arm 310, the right side area is rotatably connected with a right support arm 320, the smoke collecting hood 100 is provided with a driving device 400, the driving end of the driving device 400 is connected with the left support arm 310 and the right support arm 320 and is used for driving the left support arm 310 and the right support arm 320 to perform telescopic motion, the smoke guide plate 200 rotates relative to the smoke collecting panel 110 under the telescopic action of the left support arm 310 and the right support arm 320 to form a left smoke collecting cavity 130 and/or a right smoke collecting cavity 140 with the smoke collecting panel 110.

The range hood provided by the invention comprises a smoke collecting cover 100, a smoke guide plate 200, a driving device 400, a left supporting arm 310 and a right supporting arm 320, wherein a smoke collecting cavity is formed inside the smoke collecting cover 100 and can be used for installing components and containing lampblack gas, the smoke guide plate 200 is used for plugging a smoke inlet 120 of the smoke collecting cover 100 or forming a smoke collecting cavity together with a smoke collecting panel 110, the driving device 400 is used for driving the smoke guide plate 200 to move, and the left supporting arm 310 and the right supporting arm 320 are connected between the driving device 400 and the smoke guide plate 200 and serve.

The left supporting arm 310 and the right supporting arm 320 are respectively connected with the left part and the right part of the smoke guide plate 200 in a rotating mode, and the left supporting arm 310 and the right supporting arm 320 can extend out of the smoke collection panel 110 or retract into the smoke collection cavity under the driving action of the driving device 400, wherein the length of the left supporting arm 310 and the right supporting arm 320 extending out of the smoke collection panel 110 directly determines the distance between the left and the right rotating connection parts of the smoke guide plate 200 and the smoke collection panel 110, and accordingly the included angle formed between the left and the right direction of the smoke guide plate 200 and the smoke collection panel 110, namely the size of the smoke collection cavity can be determined. Specifically, when the range hood is not needed, the smoke guide plate 200 may be located at any position, preferably, the driving device 400 may drive the left support arm 310 and the right support arm 320 to retract toward the smoke collection cavity, and the smoke guide plate 200 moves toward the smoke collection panel 110 correspondingly until the smoke guide plate 200 is plugged at the smoke inlet 120 of the smoke collection panel 110, at this time, the smoke collection cavity and the outside of the range hood are separated into two relatively independent spaces by the smoke guide plate 200, so that secondary pollution to the kitchen caused by the backflow of the oil smoke in the common flue to the kitchen through the smoke collection cavity is reduced. When a user cooks two burners to generate oil smoke, the driving device 400 can be controlled to drive the left supporting arm 310 and the right supporting arm 320 to extend outwards, the smoke guide plate 200 correspondingly moves outwards, gaps exist between the left side and the right side of the smoke guide plate 200 and the smoke collection panel 110, accordingly, a plate body in the left side area of the smoke guide plate 200 and the smoke collection panel 110 form a left smoke collection cavity 130, the position of the left smoke collection cavity 130 corresponds to the position of the left burner up and down, oil smoke gas generated by the left burner can flow into the left smoke collection cavity 130 through an opening in the left side of the left smoke collection cavity 130, then flows into the smoke collection cavity through the smoke inlet 120, and is conveyed to a common flue; meanwhile, the plate body of the right side area of the smoke guide plate 200 and the smoke collecting panel 110 form a right smoke collecting cavity 140, the position of the right smoke collecting cavity 140 corresponds to the position of the right burner up and down, and the oil smoke gas generated by the right burner can flow into the right smoke collecting cavity 140 through the opening on the right side of the right smoke collecting cavity 140, then flows into the smoke collecting cavity through the smoke inlet 120, and is then conveyed to the public flue.

When a user cooks with only the left burner to generate oil smoke, the driving device 400 can be controlled to drive the left supporting arm 310 to extend outwards, the left side of the smoke guide plate 200 is forced to rotate outwards, and a left smoke collecting cavity 130 is formed between the smoke collecting panel 110 (in the process, the driving device 400 can be controlled to drive the right supporting arm 320 to extend outwards for a certain distance according to actual conditions so as to reduce the interference between the right side plate body and the smoke collecting panel 110 in the rotating process of the smoke guide plate 200), at the moment, the right side position of the smoke guide plate 200 is approximately unchanged, the distance between the smoke guide plate 200 and the smoke collecting panel 110 is smaller or even abutted, when the suction power in the smoke collecting cavity is constant, compared with the arrangement of the openings on the left side and the right side of the smoke inlet 120, the smoke guide plate 200 can generate a blocking effect on the right side area of the air inlet, the effective air inlet area of the smoke inlet 120 is reduced, and the suction effect of the corresponding smoke collecting cavity on the oil smoke gas at the left burner through the left smoke collecting cavity 130 is enhanced; in addition, form the effective storehouse that presss from both sides of opening towards the left between smoke deflector 200 and the collection cigarette panel 110, can carry out the shutoff to the right side to reduce the outside escape volume of the oil smoke gas that gets into in the left smoke collecting cavity 130, further improve the suction effect of lampblack absorber to left furnace end department oil smoke gas. Similarly, when a user cooks with only the right burner to generate oil smoke, the driving device 400 may be controlled to drive the right supporting arm 320 to extend outward, the right side of the smoke guide plate 200 is forced to rotate outward to form a right smoke collection chamber 140 with the smoke collection panel 110, at this time, the smoke guide plate 200 seals the left area of the smoke inlet 120, and the smoke collection chamber effectively enhances the suction effect of the right burner on the oil smoke gas through the right smoke collection chamber 140. In addition, the user can also control the extending distance of the left supporting arm 310 or the right supporting arm 320 according to the amount of the oil smoke generated by cooking to adjust the opening size of the smoke collecting cavity, and correspondingly adjust the suction strength of the smoke collecting cavity to the oil smoke gas at the corresponding furnace end.

That is, this lampblack absorber can be adjusted the form that leads cigarette board 200 to form and hold together the cigarette chamber according to the in service behavior of user to the furnace end, makes its suction intensity when culinary art to single furnace end strengthen greatly, correspondingly improves the suction effect of lampblack absorber to single furnace end culinary art. According to the simulation analysis, the lampblack absorber of this application compares prior art and promotes nearly 15% to the suction effect of single furnace end. In addition, the smoke deflector 200 is connected in left supporting arm 310 and right supporting arm 320 in a rotating manner, the driving device 400 only needs to drive the telescopic motion of the left supporting arm 310 and the right supporting arm 320, and the approaching or departing motion of the smoke deflector 200 and the smoke collecting panel 110 can be realized, and the smoke deflector 200 can rotate relative to the smoke collecting panel 110, namely, the smoke deflector 200 can realize the spacing adjustment and the rotation angle adjustment of the smoke collecting panel 110 under the telescopic action of the left supporting arm 310 and the right supporting arm 320, and further realize the position, the form and the size adjustment of the smoke collecting cavity.

It is understood that the rotational connection between the smoke guide panel 200 and the left and

right support arms

310, 320 may be a hinge or other connection that allows the smoke guide panel 200 to rotate relative to the left and

right support arms

310, 320.

Specifically, the telescopic movement of the left and

right support arms

310 and 320 relative to the smoke collection panel 110 may include two cases: the supporting arm may be a telescopic rod with a length capable of being extended and retracted, and the driving device 400 realizes the extension and retraction movement relative to the smoke collection panel 110 by driving the telescopic rod to extend or shorten, thereby realizing the extension and retraction driving of the smoke guide plate 200; alternatively, the support arm is a rigid arm, and the driving device 400 realizes the telescopic movement relative to the smoke collection panel 110 by driving the support arm to move inward and outward relative to the smoke collection panel 110. Preferably, the smoke guide plate 200 may be an integrally formed plate, when the driving device 400 drives the left support arm 310 and the right support arm 320 to perform the telescopic motion, the left and right side regions of the smoke guide plate 200 respectively receive the telescopic acting forces of the left support arm 310 and the right support arm 320, the smoke guide plate 200 rotates relative to the smoke collection panel 110 under the combined action of the two telescopic acting forces, and the integrally formed plate has high deformation resistance and high linkage stability, so as to improve the position accuracy of the smoke guide plate 200 along with the telescopic motion or the rotation of the left support arm 310 and the right support arm 320.

It should be noted that the directions "left" and "right" are defined with reference to the user's face facing the range hood when the range hood is in use, and are not limited.

Alternatively, in the present embodiment, the left support arm 310 and the right support arm 320 may both extend toward the outside of the smoke collecting panel 110, the left guide rail is fixedly provided at the left side region of the smoke collecting hood 100, and the left support arm 310 is slidably connected to the left guide rail along the length direction of the left guide rail; the right guide rail 330 is fixedly installed at the right side region of the smoke collecting cover 100, and the right support arm 320 is slidably connected to the right guide rail 330 along the length direction of the right guide rail 330. Firstly, the left supporting arm 310 and the right supporting arm 320 are parallel to each other and extend towards the outside of the smoke collection panel 110, so that the driving device 400 can control the distance and the angle of the smoke guide plate 200 relative to the smoke collection panel 110 more simply and conveniently by driving the extending lengths of the left supporting arm 310 and the right supporting arm 320, and the corresponding control precision is higher; in addition, the movement strokes of the left supporting arm 310 and the right supporting arm 320 in the smoke collection cavity are regular, and the occupation of the smoke collection cavity space and the interference of other parts are greatly reduced; secondly, the left guide rail can guide and limit the telescopic motion of the left support arm 310, and the right guide rail 330 can also guide and limit the telescopic motion of the right support arm 320, so that the position accuracy of the driving device 400 driving the two support arms to move telescopically can be further improved, and the motion position accuracy of the smoke guide plate 200 can be correspondingly improved. Note that, in this case, rigid arms are used for both the left support arm 310 and the right support arm 320.

Alternatively, in this embodiment, as shown in fig. 5 and 6, the driving device 400 may include a telescopic driving assembly 410, a connecting arm 420 and a limiting arm 430, one end of the connecting arm 420 is hinged to the left supporting arm 310, and the other end is hinged to the right supporting arm 320, and the left supporting arm 310, the smoke guide plate 200, the right supporting arm 320 and the connecting arm 420 together form a parallelogram linkage mechanism; one end of the limiting arm 430 is fixedly connected with the smoke collecting cover 100, and the other end is pivoted to the connecting arm 420; the drive end of the telescoping drive assembly 410 is coupled to the left support arm 310 for driving the left support arm 310 to slide back and forth along the left guide rail. Here is a specific form of the telescopic motion of the driving device 400 driving the left supporting arm 310 and the right supporting arm 320, in an initial state, as shown in fig. 2, the left supporting arm 310 and the right supporting arm 320 extend out to a certain distance to the outside of the smoke collection panel 110, at this time, a left smoke collection cavity 130 is formed between the left side of the smoke guide plate 200 and the smoke collection panel 110, a right smoke collection cavity 140 is formed between the right side of the smoke guide plate 200 and the smoke collection panel 110, when a user cooks with the left burner and the right burner to generate oil smoke, the range hood can be directly opened for use; in the parallelogram link mechanism formed by the left support arm 310, the right support arm 320, the connecting arm 420 and the smoke guide plate 200, the left support arm 310 is guided and limited in the length direction of the left guide rail, the right support arm 320 is guided and limited in the length direction of the right guide rail 330, the connecting arm 420 is limited in the pivot joint of the limiting arm 430 and the smoke guide plate, the relationship diagram is shown in fig. 7 (in the figure, the solid line represents the initial position of the smoke guide plate 200, the dotted line represents the position of the smoke guide plate 200 and the smoke collection panel 110 when forming the left smoke collection cavity 130), the degree of freedom of the parallelogram link mechanism is 1, the motion track of the smoke guide plate 200 is driven by driving the telescopic motion of the left support arm 310 to be unique, and the motion position precision of the smoke guide plate 200 can be ensured.

When a user cooks with only the left burner to generate oil smoke, as shown in fig. 3, the telescopic driving assembly 410 can be controlled to drive the left supporting arm 310 to extend outwards along the left guide rail, and the connecting arm 420 rotates around the pivot joint of the connecting arm 420 and the limiting arm 430 under the outward acting force of the left supporting arm 310 and the limiting action of the limiting arm 430, and accordingly, the right end of the connecting arm 420 drives the right supporting arm 320 to move inwards along the right guide rail 330; the left side of the smoke guide plate 200 moves outwards under the pushing-out action of the left support arm 310, and the right side of the smoke guide plate 200 moves inwards under the pulling-back action of the right support arm 320 until the right side of the smoke guide plate 200 reaches a smaller set distance or even abuts against the smoke collection panel 110, and the smoke guide plate 200 and the smoke collection panel 110 form a left smoke collection cavity 130 with an opening facing left. When a user cooks with only the right burner to generate oil smoke, as shown in fig. 4, the driving assembly can be controlled to drive the left supporting arm 310 to retract inwards along the left guide rail, the right supporting arm 320 extends outwards under the driving action of the connecting arm 420, and the smoke guide plate 200 forms a right smoke collecting cavity 140 with an opening facing right with the smoke collecting panel 110 under the pulling-back action of the left supporting arm 310 and the pushing-out action of the right supporting arm 320.

The arrangement enables the range of an included angle β degree between the smoke guide plate 200 and the smoke collection panel 110 to be 0-8 degree, and particularly, the range of a smoke collection angle between the left smoke guide plate 200 and the smoke collection cavity 130 and the right smoke collection cavity 140 degree can be 5-8 degree, and the range of a smoke collection angle between the left smoke guide plate 200 and the smoke collection cavity can be preferably 5-8 degree as shown in fig. 3.

Similarly, the drive end of the telescopic drive assembly 410 may also be coupled to the right support arm 320 for driving the right support arm 320 to slide back and forth along the right guide rail 330. The working principle is similar to that described above, and the description is omitted here. In addition, since the left and

right support arms

310 and 320 are displaced by a small distance in the left-right direction (the displacement change is not shown in fig. 7) during the rotation of the parallelogram link mechanism, the left and right guide rails 330 can be made thicker to allow the left and

right support arms

310 and 320 to move in the left-right direction while guiding the left and

right support arms

310 and 320 in the longitudinal direction.

Specifically, the telescopic driving assembly 410 may be a push rod motor, or a rack and pinion assembly, a lead screw nut assembly, or other assemblies capable of driving the support arm to reciprocate along the length direction thereof.

The driving device 400 may include two driving units, which are respectively connected to the left and

right support arms

310 and 320, and respectively and independently drive the telescopic movement of the left and

right support arms

310 and 320.

Optionally, in this embodiment, as shown in fig. 5 and fig. 6, when the pivot joint of the limiting arm 430 and the connecting arm 420 is located at the middle position of the connecting arm 420, taking the left supporting arm 310 as an example of a driving arm for analysis, the left supporting arm 310 extends outward by a distance L under the driving action of the telescopic driving component 410, the left end of the connecting arm 420 rotates around the pivot joint by an angle α, the right end of the connecting arm 420 rotates around the pivot joint by an angle α in an opposite direction, and the right end of the connecting arm 420 drives the right supporting arm 320 to retract inward by the distance L, accordingly, the left and right sides of the smoke guide plate 200 rotate in opposite directions and by equal angles, so that the rotation motion of the smoke guide plate 200 is relatively uniform, the left smoke collecting cavity 130 and the right smoke collecting cavity 140 formed by the smoke collecting panel 110 have the same size, the deflection of the pivot joint to one end is reduced, and the rotation process of the smoke guide plate 200 is limited by the interference of the smoke collecting panel 110, the opening of the smoke collecting cavity corresponding to the end is relatively small, which affects the smoking effect.

Specifically, in this embodiment, a plug connector may be disposed at one end of the limiting arm 430 facing the connecting arm 420, and the connecting arm 420 is provided with a plug-in slot, and the plug connector is plugged in the plug-in slot. Here, the limiting arm 430 is pivoted to the connecting arm 420, and the plug connector of the limiting arm 430 is plugged into the plug-in groove on the connecting arm 420, and the plug connector can rotate in the plug-in groove, so that the connecting arm 420 rotates around the pivoted position; in addition, the position of the plug connector is fixed, so that the radial position of the plug groove can be correspondingly limited, and the position limitation of the hinge shaft is further realized.

Alternatively, in this embodiment, as shown in fig. 3 and fig. 5, a left insertion tube 311 with an upward opening may be disposed at one end of the left support arm 310 facing the smoke guide plate 200, a left insertion shaft 210 is disposed on an inner wall of the smoke guide plate 200, and the left insertion shaft 210 is inserted into the left insertion tube 311 from top to bottom; similarly, a right insertion tube 321 with an upward opening may be disposed at one end of the right support arm 320 facing the smoke guide plate 200, a right insertion shaft 220 is disposed on an inner wall of the smoke guide plate 200, and the right insertion shaft 220 is inserted into the right insertion tube 321 from top to bottom. Here, it is a specific form that the left supporting arm 310 and the right supporting arm 320 are rotatably connected to the smoke guide plate 200, wherein the left plug shaft 210 can rotate in the left plug cylinder 311 to realize the rotatable connection of the left supporting arm 310 and the smoke guide plate 200; the right insertion shaft 220 can rotate in the right insertion cylinder 321, so that the right support arm 320 is rotatably connected with the smoke guide plate 200. In addition, when the smoke guide plate 200 needs to be installed, the smoke guide plate 200 can be hung at the outer ends of the left support arm 310 and the right support arm 320 only by inserting the left insertion shaft 210 of the smoke guide plate 200 into the left insertion cylinder 311 and inserting the right insertion shaft 220 into the right insertion cylinder 321; when the smoke guide plate 200 needs to be disassembled, the smoke guide plate 200 only needs to move upwards, the left inserting shaft 210 is extracted from the left inserting cylinder 311, the right inserting shaft 220 is extracted from the right inserting cylinder 321, the smoke guide plate 200 is convenient to disassemble and assemble, maintenance or cleaning treatment and the like of the smoke guide plate 200 and parts in a smoke collecting cavity are facilitated, and convenience in use of the range hood can be effectively improved.

Similarly, a left plug-in shaft 210 may be disposed at one end of the left support arm 310 facing the smoke guide plate 200, a left plug-in cylinder 311 with a downward opening is disposed on an inner wall of the smoke guide plate 200, and the left plug-in shaft 210 is plugged into the left plug-in cylinder 311 from bottom to top; the right supporting arm 320 has a right insertion shaft 220 at an end facing the smoke guide plate 200, the inner wall of the smoke guide plate 200 has a right insertion tube 321 with a downward opening, and the right insertion shaft 220 is inserted into the right insertion tube 321 from bottom to top. Here, the smoke guide plate 200 is connected with the left support arm 310 and the right support arm 320 in a rotating manner in another form, and the principle and the using method are similar to those described above, and are not described again.

Besides the above-mentioned forms, the smoke guide plate 200 may be connected with the left support arm 310 and the right support arm 320 in a rotating manner, and a hinge lug may be fixed to the inner wall of the smoke guide plate 200, and one end of the support arm facing the smoke guide plate 200 is hinged to the hinge lug through a hinge shaft, so as to realize the hinge connection of the support arm and the smoke guide plate 200, and when the driving device 400 drives the left support arm 310 and the right support arm 320 to perform telescopic motion, the smoke guide plate 200 may perform telescopic motion under the telescopic action of the support arm, and simultaneously rotate around the hinge shaft to realize the rotating motion relative to the smoke collection panel 110.

In this embodiment, as shown in fig. 5, the connecting plate 230 may be glued to the inner wall of the smoke guide 200, and the left supporting arm 310 and the right supporting arm 320 are hinged to the connecting plate 230. The left supporting arm 310 and the right supporting arm 320 are hinged with the smoke guide plate 200 through the connecting plate 230, so that damage to the strength and the sealing performance of the smoke guide plate 200 caused by punching and the like of the smoke guide plate 200 by a connecting structure can be effectively reduced, the service life of the smoke guide plate 200 is prolonged, and the sealing performance and the appearance smoothness of the smoke guide plate are improved.

In this embodiment, as shown in fig. 1 and 2, the oil collecting box 500 may be detachably fixed to the bottom of the fume collecting cover 100. When the range hood is used, oil stains adhered to the smoke collecting hood 100 and other parts flow downwards into the oil collecting box 500, and the oil collecting box 500 can receive the oil stains so as to reduce the pollution to the range top or a cooker caused by the direct downward dripping of the oil stains; after the oil collecting box 500 is used for a period of time, the oil collecting box 500 can be detached to be cleaned, and the oil collecting box is installed on the smoke collecting hood 100 again after the treatment is finished, so that the oil collecting box can be reused.

In the present embodiment, as shown in fig. 1 and fig. 2, the fume collecting hood 100 may be provided with a flow guiding assembly 510, and the flow guiding assembly 510 is located between the oil collecting box 500 and the fume guiding plate 200, and is used for guiding the oil dirt dropped by the fume guiding plate 200 into the oil collecting box 500. Because the smoke guide plate 200 is located outside the smoke collecting hood 100, the oil stain adhered on the smoke guide plate 200 can not directly flow into the oil collecting box 500, and therefore the flow guide assembly 510 is arranged, the oil stain on the smoke guide plate 200 can drop into the flow guide assembly 510 downwards, and then flows into the oil collecting box 500 under the flow guide effect of the flow guide assembly 510, so that the pollution to a cooking bench, a cooker and the like caused by the dropping of the oil stain on the smoke guide plate 200 is reduced.

Specifically, as shown in fig. 3 and 4, a fan housing 600 may be communicated above the smoke collecting hood 100, a fan 700 may be installed in the fan housing 600, and the fan 700 may be used as a suction power source of the range hood to suck external oil smoke.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill 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; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A range hood is characterized by comprising a smoke collecting hood (100) and a smoke guide plate (200), wherein a smoke collecting panel (110) of the smoke collecting hood (100) is provided with a smoke inlet (120), and the smoke guide plate (200) is positioned outside the smoke inlet (120) and corresponds to the smoke inlet (120); the left side area of the inner wall of the smoke guide plate (200) is rotatably connected with a left support arm (310), the right side area is rotatably connected with a right support arm (320), the smoke collecting hood (100) is provided with a driving device (400), the driving end of the driving device (400) is connected with the left support arm (310) and the right support arm (320) and used for driving the left support arm (310) and the right support arm (320) to perform telescopic motion, and the smoke guide plate (200) rotates relative to the smoke collecting panel (110) under the telescopic action of the left support arm (310) and the right support arm (320) and forms a left smoke collecting cavity (130) and/or a right smoke collecting cavity (140) with the smoke collecting panel (110).

2. A range hood according to claim 1, characterized in that the left support arm (310) and the right support arm (320) both extend towards the outside of the fume collecting panel (110), a left guide rail is fixedly arranged on the left side area of the fume collecting hood (100), and the left support arm (310) is in sliding connection with the left guide rail along the length direction of the left guide rail; the right guide rail (330) is fixedly arranged in the right side area of the smoke collecting cover (100), and the right supporting arm (320) is connected to the right guide rail (330) in a sliding mode along the length direction of the right guide rail (330).

3. A hood, according to claim 2, characterized in that said driving means (400) comprise a telescopic driving assembly (410), a connecting arm (420) and a limit arm (430), said connecting arm (420) being hinged at one end to said left supporting arm (310) and at the other end to said right supporting arm (320), and said left supporting arm (310), said smoke guide plate (200), said right supporting arm (320) and said connecting arm (420) together constituting a parallelogram linkage; one end of the limiting arm (430) is fixedly connected with the fume collecting hood (100), and the other end of the limiting arm is pivoted to the connecting arm (420);

the driving end of the telescopic driving component (410) is connected with the left supporting arm (310) and is used for driving the left supporting arm (310) to slide along the left guide rail in a reciprocating mode; or the driving end of the telescopic driving component (410) is connected with the right supporting arm (320) and is used for driving the right supporting arm (320) to slide back and forth along the right guide rail (330).

4. The range hood according to claim 3, wherein the pivot joint of the limiting arm (430) and the connecting arm (420) is located at the middle position of the connecting arm (420) in the length direction.

5. A range hood as claimed in claim 3, wherein a plug connector is arranged at one end of the limiting arm (430) facing the connecting arm (420), the connecting arm (420) is provided with a plug groove, and the plug connector is plugged in the plug groove.

6. A range hood according to any of claims 1-5, characterized in that the included angle between the smoke guide plate (200) and the smoke collecting panel (110) is in the range of 0-8 °.

7. A range hood as claimed in any one of claims 1 to 5, characterized in that one end of the left supporting arm (310) facing the smoke guide plate (200) is provided with a left plug-in cylinder (311) with an upward opening, the inner wall of the smoke guide plate (200) is provided with a left plug-in shaft (210), and the left plug-in shaft (210) is plugged into the left plug-in cylinder (311) from top to bottom; one end, facing the smoke guide plate (200), of the right supporting arm (320) is provided with a right insertion cylinder (321) with an upward opening, the inner wall of the smoke guide plate (200) is provided with a right insertion shaft (220), and the right insertion shaft (220) is inserted into the right insertion cylinder (321) from top to bottom;

or, a left plug-in shaft (210) is arranged at one end of the left supporting arm (310) facing the smoke guide plate (200), a left plug-in cylinder (311) with a downward opening is arranged on the inner wall of the smoke guide plate (200), and the left plug-in shaft (210) is plugged in the left plug-in cylinder (311) from bottom to top; one end, facing the smoke guide plate (200), of the right supporting arm (320) is provided with a right insertion shaft (220), the inner wall of the smoke guide plate (200) is provided with a right insertion cylinder (321) with a downward opening, and the right insertion shaft (220) is inserted into the right insertion cylinder (321) from bottom to top.

8. A hood according to any of claims 1-5, characterized in that a connection plate (230) is glued to the inner wall of the smoke guide (200), said left support arm (310) and said right support arm (320) being hinged to said connection plate (230).

9. A range hood according to any of claims 1-5, characterized in that the smoke guide plate (200) is an integrally formed plate body.

10. The range hood according to claim 9, characterized in that an oil collecting box (500) is detachably and fixedly arranged at the bottom of the fume collecting hood (100), the fume collecting hood (100) is provided with a flow guide assembly (510), and the flow guide assembly (510) is located between the oil collecting box (500) and the fume guide plate (200) and is used for guiding oil stains dripped from the fume guide plate (200) into the oil collecting box (500).