CN212081368U

CN212081368U - Smoke exhaust ventilator

Info

Publication number: CN212081368U
Application number: CN202020782635.2U
Authority: CN
Inventors: 李春阳
Original assignee: Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Current assignee: Wuhu Midea Smart Kitchen Appliance Manufacturing Co Ltd
Priority date: 2020-05-12
Filing date: 2020-05-12
Publication date: 2020-12-04
Anticipated expiration: 2030-05-12

Abstract

The utility model provides a range hood, include: a frame part; the head part extends downwards from the bottom end of the frame part and is provided with a smoking port of a cigarette machine; and the opening and closing device of the cigarette port baffle comprises an opening and closing baffle, and the opening and closing baffle can move between a baffle closing position for closing the cigarette smoking port of the cigarette machine and a baffle opening position for exposing the cigarette smoking port of the cigarette machine. The smoke suction port of the range hood can be closed or opened by controlling the opening and closing baffle to move between the baffle closing position and the baffle opening position, and when the opening and closing baffle is at the baffle opening position, oil smoke generated during cooking of a user can be gathered at the smoke suction port of the range hood, so that the oil smoke is quickly sucked out through the smoke suction port of the range hood, the range hood is ensured to have a better oil smoke suction effect, and the use experience of the user is favorably improved; when the opening and closing baffle is in the baffle closing position, the opening and closing baffle seals the smoke suction port of the range hood, so that the oil smoke is prevented from flowing backwards through the smoke suction port of the range hood to enter the kitchen, and meanwhile, foreign matters can be prevented from entering the kitchen through the smoke suction port of the range hood.

Description

Smoke exhaust ventilator

Technical Field

The utility model belongs to the domestic appliance field specifically, relates to a range hood.

Background

The range hood on the existing market mostly uses European style or side draft type range hood, and the range hoods of the two types all have the problems of large kitchen space occupation after the installation and head collision risk in the use process. Taking a european style range hood as an example, the front and back sizes of a guide plate of the european style range hood are too large, so that the head of a user is easy to collide with the guide plate in the use process under a use environment with a small kitchen space, so that the user experience is poor, and the european style range hood is far away from a smoke source and cannot suck away oil smoke in time, so that the oil smoke is easy to diffuse, and the smoke suction effect is poor; a user can easily collide with the range hood when a frying pan is turned over and fried in the using process of the side-draft range hood, the front and back sizes of the side-draft range hood are small, oil smoke is easy to diffuse forwards, and the smoking effect is poor.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned not enough or defect among the prior art, the utility model provides a range hood for solve the not good problem of range hood smoking effect on the market at present.

In order to achieve the above object, the utility model provides a range hood, range hood includes: a frame part; the head part extends downwards from the bottom end of the frame part and is provided with a smoking port of a cigarette machine; and the opening and closing device of the cigarette port baffle comprises an opening and closing baffle, and the opening and closing baffle can move between a baffle closing position for closing the cigarette smoking port of the cigarette machine and a baffle opening position for exposing the cigarette smoking port of the cigarette machine.

Optionally, the smoke hole baffle opening and closing device further comprises a four-bar mechanism connected with the opening and closing baffle, and the four-bar mechanism is installed in a nose cavity of the nose part.

Optionally, the four-bar linkage is a double-rocker mechanism and includes a driving rocker, a middle link and a driven rocker hinged in sequence, the driven rocker includes a rocker section and an extension section, the extension section extends from a free hinge point of the rocker section, and the tail end of the extension section is connected to the opening and closing baffle.

Optionally, the smoke hole baffle opening and closing device further comprises a speed reduction motor assembly, and the speed reduction motor assembly is connected with and drives the driving rocker to rotate.

Optionally, the smoke hole baffle opening and closing device further comprises a matching rocker which is the same as the driven rocker in shape and is arranged in parallel at intervals, a pivoting connecting rod is arranged between a fixed hinge point of the driven rocker and a fixed hinge point corresponding to the matching rocker, and the tail end of an extending section of the matching rocker and the tail end of an extending section corresponding to the driven rocker are respectively connected to two ends of the opening and closing baffle.

Optionally, the driven rocker and the intermediate link are both arc-shaped rods.

Optionally, the cigarette mouth baffle device that opens and shuts still includes first side mounting bracket and the second side mounting bracket that the interval set up, four-bar linkage installs on the first side mounting bracket, the cooperation rocker is articulated install in on the second side mounting bracket, first side mounting bracket and second side mounting bracket are installed respectively on the lateral wall of both sides in the aircraft nose intracavity.

Optionally, the first side mounting frame is provided with a first limiting structure and a second limiting structure for limiting rotation of the driving rocker, and the driving rocker abuts against the first limiting structure at the closed position of the baffle and abuts against the second limiting structure at the open position of the baffle.

Optionally, the cigarette smoking port of the cigarette making machine is arranged on the bottom end face of the nose part and is formed into a forward and downward inclined opening, the opening and closing baffle plate vertically extends forwards above the cigarette smoking port of the cigarette making machine in the baffle plate opening position, and the opening and closing baffle plate is obliquely covered on the cigarette smoking port of the cigarette making machine in the baffle plate closing position.

Optionally, the thickness of the frame portion is greater than that of the nose portion along the front-back direction of the range hood, and the front end of the opening and closing baffle does not exceed the front end surface of the frame portion at the opening position of the baffle.

In the range hood of the utility model, because the head part extends downwards from the bottom end of the frame part and the bottom end is provided with a smoke suction port of the range hood, a condensing plate device is lacked, and the smoke suction port is opened for a long time to easily feed foreign matters, a smoke port baffle opening and closing device is particularly added, an opening and closing baffle plate of the opening and closing baffle plate is arranged at the smoke suction port of the range hood, the smoke suction port of the range hood can be closed or opened by controlling the opening and closing baffle plate to move between a baffle closing position and a baffle opening position, and when the baffle plate is opened, the oil smoke generated during cooking of a user can be better gathered at the smoke suction port of the range hood, so that the oil smoke is quickly sucked out through the smoke suction port of the range hood, the range hood is; when the opening and closing baffle is in the closing position of the baffle, the opening and closing baffle seals the smoke suction port of the range hood to prevent the oil smoke from flowing backwards through the smoke suction port of the range hood to enter a kitchen or prevent foreign matters from entering the kitchen.

Other features and advantages of the present invention will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 and 2 are side views of a range hood according to an embodiment of the present invention, wherein the opening and closing baffle of fig. 1 is in a baffle opening position, and the opening and closing baffle of fig. 2 is in a baffle closing position;

fig. 3 is a schematic structural view of a mouthpiece baffle opening and closing device according to an embodiment of the present invention;

fig. 4 is an installation schematic diagram of a speed reduction motor assembly in the range hood of fig. 1.

Description of reference numerals:

1 frame part 2 nose part

3 smoke mouth baffle opening and closing device

31 opening and closing baffle 32 four-bar linkage

33 speed reducing motor assembly 34 matched with rocker

35 first side mounting bracket of pivotal connecting rod 36

37 second side mounting frame 38 first limiting structure

39 second limit structure

320 active rocker 321 middle connecting rod

322 driven rocker 323 free hinge point

3221 Rocker segment 3222 extension

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the present invention, unless otherwise specified, the use of directional terms such as "upper, lower, top, bottom" and "upper" are generally used with respect to the orientation shown in the drawings or the positional relationship of the components with respect to each other in the vertical, vertical or gravitational direction.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The utility model provides a range hood. Referring to fig. 1-2, in one embodiment, a range hood comprises: a frame part 1; the machine head part 2 extends downwards from the bottom end of the machine frame part 1 and is provided with a smoking port of a cigarette machine; and the cigarette mouth baffle opening and closing device 3 comprises an opening and closing baffle 31, and the opening and closing baffle 31 can move between a baffle closing position for closing the cigarette smoking mouth of the cigarette machine and a baffle opening position for exposing the cigarette smoking mouth of the cigarette machine.

In one embodiment, as shown in fig. 1 and 2, a frame part 1 is connected with a head part 2, the head part 2 extends downwards from the bottom end of the frame part 1, an inclined opening is arranged forwards and downwards on the bottom end surface of the head part 2 to form a smoke sucking opening of a range hood, an opening and closing baffle 31 of a smoke opening baffle opening and closing device 3 is arranged at the smoke sucking opening of the range hood, the opening and closing baffle 31 is controlled to move between a baffle closing position and a baffle opening position to close or open the smoke sucking opening of the range hood, when the opening and closing baffle 31 is controlled to be in the baffle opening position, the opening and closing baffle 31 is positioned above the smoke sucking opening of the range hood and extends forwards vertically, at the moment, the opening and closing baffle 31 is parallel to an operating surface of the range hood, oil smoke generated by user operation is gathered at the smoke sucking opening and closing baffle 31 in the process of rising upwards, the oil smoke at the smoke sucking opening can be, therefore, the oil smoke can be better gathered at the smoke suction port of the range hood through the opening and closing baffle plate 31, so that the smoke suction effect of the range hood is better; when the opening and closing baffle 31 is controlled to be in the baffle closing position, the opening and closing baffle 31 seals the smoke suction port of the range hood, the oil smoke can be prevented from flowing backwards into the kitchen through the smoke suction port of the range hood, and meanwhile, foreign matters can be prevented from entering the kitchen through the smoke suction port of the range hood.

In one embodiment, preferably, the smoke vent baffle opening and closing device 3 further includes a four-bar linkage 32 connected to the opening and closing baffle 31, the four-bar linkage 32 is installed in the nose cavity of the nose portion 2, that is, the opening and closing baffle 31 is switched between the baffle opening position and the baffle closing position through the four-bar linkage 32 to open or close the smoke vent of the range hood, as shown in fig. 1, the four-bar linkage 32 drives the opening and closing baffle 31 to move to the position where the opening and closing baffle 31 is parallel to the horizontal plane, so that the rising smoke generated during cooking is blocked by the opening and closing baffle 31, the blocked smoke is gathered near the smoke vent of the range hood to facilitate the smoke removal, after the cooking is finished, as shown in fig. 2, the four-bar linkage 32 drives the opening and closing baffle 31 to move to close the smoke vent of the range hood to prevent the smoke from flowing backwards, the four-bar linkage 32 can drive the opening and closing baffle 31 to cooperate with the range hood to switch different working states under, thereby ensuring the range hood to have the best smoking effect.

In another embodiment, the cigarette mouth baffle opening and closing device 3 comprises a pivot shaft (not shown) pivotally connected with the opening and closing baffle 31, the pivot shaft is installed in a head cavity of the head part 2, the opening and closing baffle 31 can rotate around the pivot shaft to switch between a baffle closing position and a baffle opening position, so as to close or open a cigarette smoking mouth of a cigarette machine, a user can select to manually control the opening and closing baffle 31 to rotate around the pivot shaft or drive the opening and closing baffle 31 to rotate around the pivot shaft by adopting a driving motor so as to open or close the cigarette smoking mouth of the cigarette machine, the structure arrangement of the opening and closing baffle 31 and the pivot shaft is adopted, the structure of the cigarette mouth baffle opening and closing device 3 is simplified, the assembly or disassembly of the opening and closing baffle 31 is convenient, and the.

In order to meet the use requirement of a narrow kitchen, the size of the range hood is limited, and therefore, in the design of the range hood, in order to ensure that the occupied space is small in the process that the four-bar linkage 32 drives the opening and closing baffle 31 to switch between the baffle closing position and the baffle opening position, as shown in fig. 3, preferably, the four-bar linkage 32 is a double-rocker linkage and includes a driving rocker 320, an intermediate link 321 and a driven rocker 322 which are hinged in sequence, the driven rocker 322 includes a rocker section 3221 and an extension section 3222, and the extension section 3222 extends from the free hinge point 323 of the rocker section 3221 and is connected to the opening and closing baffle 31 at the tail end. The free hinge point 323 divides the driven rocker 322 into a rocker section 3221 and an extension section 3222, the middle connecting rod 321 is hinged with the driven rocker 322 at the free hinge point 323, the four-bar mechanism 32 is a double-rocker mechanism, the middle connecting rod 321 hinged with the driving rocker 320 can be driven to move by controlling the driving rocker 320 to swing in a certain angle range, and further the driven rocker 322 hinged with the middle connecting rod 321 is driven to swing in a certain angle range, so that the opening and closing baffle 31 connected with the tail end of the extension section 3222 of the driven rocker 322 is driven to swing between the baffle opening position and the baffle closing position, the double-rocker mechanism is adopted, the required space size is smaller when the driving rocker 320 drives the driven rocker 322 to swing in a certain angle range in a reciprocating manner, the switching of the opening and closing baffle 31 between the baffle closing position and the baffle opening position is realized, and the installation space is saved, so that the range hood can be applied to wider application.

For the convenience of using the range hood, as shown in fig. 4, optionally, the smoke vent baffle opening and closing device 3 further includes a speed reduction motor assembly 33, and the speed reduction motor assembly 33 is connected to and drives the driving rocker 320 to rotate. Through gear motor assembly 33 drive initiative rocker 320 reciprocal swing in certain angle within range and switch baffle 31 and seal or open the cigarette machine mouth of smoking, solved the user and can't vacate the problem that both hands control baffle 31 that opens and shuts the swing between baffle closed position or baffle open position at the in-process of cooking operation, convenience of customers uses, has promoted user's use and has experienced.

In order to keep the opening and closing baffle 31 more stable in the process of swinging between the baffle closing position and the baffle opening position under the driving of the four-bar linkage 32, preferably, the smoke port baffle opening and closing device 3 further comprises a matching rocker 34 which is the same as the driven rocker 322 in shape and is arranged in parallel at intervals, a pivoting connecting rod 35 is arranged between a fixed hinge point of the driven rocker 322 and a fixed hinge point corresponding to the matching rocker 34, and the tail end of an extension section of the matching rocker 34 and the tail end of an extension section 3222 corresponding to the driven rocker 322 are respectively connected to two ends of the opening and closing baffle 31. The matching rocker 34 is arranged in parallel and at an interval with the driven rocker 322, the matching rocker 34 is connected with the driven rocker 322 through the pivot connecting rod 35, the tail end of the extending section of the matching rocker 34, which is not hinged with the pivot connecting rod 35, is connected with the opening and closing baffle 31, thus, in the process that the speed reduction motor assembly 33 drives the driving rocker 320 to swing within a certain angle range, the driving rocker 320 drives the driven rocker 322 through the middle connecting rod 321 and drives the matching rocker 34 to swing within a certain angle range through the pivot connecting rod 35, and further drives the opening and closing baffle 31 connected with the driven rocker 322 and the matching rocker 34 to swing between the baffle closing position and the baffle opening position, so that the closing or opening of the smoking mouth of the cigarette machine is completed. For the convenience of opening and closing the baffle 31 clean, the baffle 31 that opens and shuts can be made by any one in perspective toughened glass board, corrosion resistant plate, aluminum plate etc. driven rocker 322 and cooperation rocker 34 and the baffle 31 that opens and shuts can adopt modes such as welding, articulated or threaded connection to carry out fixed connection, do not prescribe a limit to the driven rocker 322 and the connected mode of cooperation rocker 34 and baffle 31 that opens and shuts in this application.

In order to avoid interference between the middle connecting rod 321 and the driven rocker 322 and other components of the range hood when the driving rocker 320 swings the middle connecting rod 321 and the driven rocker 322, the driven rocker 322 and the middle connecting rod 321 are preferably arc-shaped rods. Driven rocker 322 and middle connecting rod 321 set up to the arc pole when the swing compare the activity space that occupies littleer with the straight line pole, can be better avoid producing the space with other parts and interfere, do benefit to the structural design who optimizes range hood, as shown in fig. 3, set up the swing angle of restriction initiative rocker 320 that the mobile position of middle connecting rod 321 that sets up to the arc pole can be convenient through the restriction, and then control baffle 31 that opens and shuts opens or closed cigarette machine smoking mouth.

In one embodiment, as shown in fig. 3, preferably, the smoke damper opening and closing device 3 further includes a first side mounting bracket 36 and a second side mounting bracket 37 arranged at an interval, the four-bar linkage 32 is installed on the first side mounting bracket 36, the matching rocker 34 is hinged and installed on the second side mounting bracket 37, and the first side mounting bracket 36 and the second side mounting bracket 37 are respectively installed on two side walls in the handpiece cavity. First side mounting bracket 36 and second side mounting bracket 37 are all installed on the both sides lateral wall in the aircraft nose intracavity of aircraft nose portion 2, the articulated installation of the one end of the initiative rocker 320 in four-bar linkage 32 is on first side mounting bracket 36, cooperation rocker 34 is articulated to be installed on second side mounting bracket 37, can make things convenient for four-bar linkage 32 and cooperation rocker 34 and pivotal connection pole 35 to install in the aircraft nose intracavity through first side mounting bracket 36 and second side mounting bracket 37, under the condition that baffle 31 closed cigarette machine smoking mouth opens and shuts, four-bar linkage 32 and cooperation rocker 34 are opened and shut baffle 31 closing cap in the aircraft nose intracavity, at this moment, be convenient for the user to clean range hood's surface, and set up four-bar linkage 32 and cooperation rocker 34 in the aircraft nose intracavity, can be better utilize range hood's inner space.

In another embodiment, the active rocker 320 and the matching rocker 34 in the four-bar linkage 32 are respectively and hingedly mounted on two side walls in the machine head cavity, so that the four-bar linkage 32, the matching rocker 34 and the pivot connecting rod 35 connected with the matching rocker 34 are mounted in the machine head cavity, and thus, the structure of the range hood is simplified.

The smoke mouth baffle opening and closing device 3 needs to control the opening and closing baffle 31 to move between the baffle closing position and the baffle opening position so as to close or open the smoke mouth of the cigarette making machine, as shown in fig. 3, preferably, the first side mounting rack 36 is provided with a first limiting structure 38 and a second limiting structure 39 for limiting the rotation of the driving rocker 320, and the driving rocker 320 abuts against the first limiting structure 38 at the baffle closing position and abuts against the second limiting structure 39 at the baffle opening position. The swing angle range of the active rocker 320 can be limited by the first limiting structure 38 and the second limiting structure 39 which are installed on the first side installation rack 36, the first limiting structure 38 and the second limiting structure 39 limit two swing limit positions of the active rocker 320, when the active rocker 320 swings to the first limiting structure 38 or the second limiting structure 39, namely the active rocker 320 drives the opening and closing baffle 31 to be at the baffle closing position or the baffle opening position, as shown in fig. 2, when the active rocker 320 swings to the first limiting structure 38, the opening and closing baffle 31 seals the smoking mouth of the smoking machine, as shown in fig. 1, when the active rocker 320 swings to the second limiting structure 39, the opening and closing baffle 31 opens the smoking mouth of the smoking machine, and the included angle between the opening and closing baffle 31 and the horizontal direction when the opening and closing baffle is at the baffle opening position can be adjusted by adjusting the installation position of the second limiting structure 39 on the first side installation rack 36, preferably, the angle between the opening and closing baffle 31 and the horizontal direction is 0 °.

In order to gather the oil smoke and achieve better smoking effect, preferably, the smoking opening of the cigarette machine is arranged on the bottom end face of the machine head part 2 and is formed into a forward and downward inclined opening, the opening and closing baffle plate 31 extends forwards vertically above the smoking opening of the cigarette machine at the opening position of the baffle plate, and the opening and closing baffle plate 31 covers the smoking opening of the cigarette machine in an inclined mode at the closing position of the baffle plate. The smoke suction port of the range hood is arranged on the bottom end face of the machine head part 2 in a forward and downward inclined mode, the oil smoke rising upwards in the cooking process can be better absorbed, meanwhile, the opening and closing baffle plate 31 extends forwards vertically above the smoke suction port of the range hood, namely, the included angle between the opening and closing baffle plate 31 and the horizontal direction is 0 degree, and the opening and closing baffle plate 31 extends forwards in the direction opposite to the machine head part 2, as shown in figure 1, therefore, the opening and closing baffle plate 31 can gather the oil smoke rising upwards at the smoke suction port of the range hood, and the range hood is assisted to achieve a better smoking effect.

In order to ensure the range hood is installed firmly and avoid the opening and closing baffle 31 from interfering the cooking of the user when the baffle is in the opening position, preferably, the thickness of the frame part 1 is greater than that of the machine head part 2 along the front and back direction of the range hood, and the front end of the opening and closing baffle 31 does not exceed the front end surface of the frame part 1 when the baffle is in the opening position.

It should be particularly noted that other configurations and functions of the range hood according to the embodiments of the present invention are known to those skilled in the art, and are not described herein in detail to reduce redundancy.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. In the technical idea scope of the present invention, it is possible to provide the technical solution of the present invention with a plurality of simple modifications, including combining each specific technical feature in any suitable manner, and in order to avoid unnecessary repetition, the present invention does not provide additional description for various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "radial", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Although embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. A range hood, characterized in that, range hood includes:

a frame part (1);

the head part (2) extends downwards from the bottom end of the frame part (1) and is provided with a smoking port of a cigarette machine; and

the cigarette mouth baffle opening and closing device (3) comprises an opening and closing baffle (31), wherein the opening and closing baffle (31) can move between a baffle closing position for closing the cigarette smoking mouth of the cigarette machine and a baffle opening position for exposing the cigarette smoking mouth of the cigarette machine.

2. The range hood according to claim 1, wherein the smoke vent baffle opening and closing device (3) further comprises a four-bar linkage (32) connected with the opening and closing baffle (31), and the four-bar linkage (32) is installed in a nose cavity of the nose part (2).

3. The range hood according to claim 2, wherein the four-bar linkage (32) is a double-rocker mechanism and comprises a driving rocker (320), an intermediate link (321) and a driven rocker (322) which are hinged in sequence, the driven rocker (322) comprises a rocker section (3221) and an extension section (3222), and the extension section (3222) extends out from a free hinge point (323) of the rocker section (3221) and is connected to the opening and closing baffle (31) at the tail end.

4. The range hood according to claim 3, wherein the smoke outlet baffle opening and closing device (3) further comprises a speed reduction motor assembly (33), and the speed reduction motor assembly (33) is connected with and drives the active rocker (320) to rotate.

5. The range hood according to claim 3, wherein the smoke vent baffle opening and closing device (3) further comprises a matching rocker (34) which has the same shape as the driven rocker (322) and is arranged in parallel at intervals, a pivot connecting rod (35) is arranged between a fixed hinge point of the driven rocker (322) and a corresponding fixed hinge point of the matching rocker (34), and the tail end of the extending section of the matching rocker (34) and the tail end of the extending section (3222) corresponding to the driven rocker (322) are respectively connected to two ends of the opening and closing baffle (31).

6. The range hood according to claim 5, wherein the driven rocker (322) and the middle connecting rod (321) are arc-shaped rods.

7. The range hood according to claim 5, wherein the smoke baffle opening and closing device (3) further comprises a first side mounting rack (36) and a second side mounting rack (37) which are arranged at intervals, the four-bar linkage (32) is installed on the first side mounting rack (36), the matching rocker (34) is hinged and installed on the second side mounting rack (37), and the first side mounting rack (36) and the second side mounting rack (37) are respectively installed on two side walls in the nose cavity.

8. The range hood according to claim 7, wherein the first side mounting bracket (36) is provided with a first limiting structure (38) and a second limiting structure (39) for limiting the rotation of the active rocker (320), and the active rocker (320) abuts against the first limiting structure (38) in the baffle closing position and abuts against the second limiting structure (39) in the baffle opening position.

9. The range hood according to any one of claims 1 to 8, wherein the range hood smoking port is provided on the bottom end surface of the nose part (2) and is formed as a forward and downward inclined opening, the opening and closing baffle (31) protrudes vertically forward above the range hood smoking port in the baffle open position, and the opening and closing baffle (31) covers the range hood smoking port in an inclined manner in the baffle closed position.

10. The range hood according to claim 9, wherein the thickness of the frame portion (1) is greater than that of the nose portion (2) along the front-rear direction of the range hood, and the front end of the opening and closing baffle plate (31) does not exceed the front end surface of the frame portion (1) in the baffle plate opening position.