CN116697425A

CN116697425A - Fume exhaust fan

Info

Publication number: CN116697425A
Application number: CN202210187937.9A
Authority: CN
Inventors: 司徒叠强; 黄晓霞
Original assignee: Wuhu Midea Smart Kitchen Appliance Manufacturing Co Ltd
Current assignee: Wuhu Midea Smart Kitchen Appliance Manufacturing Co Ltd
Priority date: 2022-02-28
Filing date: 2022-02-28
Publication date: 2023-09-05

Abstract

The application discloses a range hood, which comprises a hood main body, a cover plate assembly, a transmission assembly and a driving piece, wherein the hood main body is provided with a first smoke suction port and a second smoke suction port; the driving piece output shaft is connected with the first driving piece and the second driving piece and is used for driving the first driving piece and the second driving piece to move. According to the application, the first cover plate and the second cover plate are driven to move by the driving piece, so that compared with the scheme of arranging the two driving pieces, the production cost of the range hood can be reduced, and the miniaturized design of the range hood is realized. Simultaneously, first driving medium and second driving medium are all direct with the output shaft of driving medium, can reduce the energy loss when the output shaft of driving medium transmits first driving medium and second driving medium, guarantee that first apron and second apron open and shut smoothly, and the low-cost small-size driving medium of optional use.

Description

Fume exhaust fan

Technical Field

The application relates to the field of electrical equipment, in particular to a range hood.

Background

The range hood works by utilizing the fluid dynamics principle, and the range hood sucks and discharges the oil smoke through a fan assembly arranged in the inner cavity of the range hood. Double-suction type range hoods with double suction ports (such as a range hood with a top side double suction mode) appear on the market, and the smoke suction ports at different positions can be flexibly used, such as the advantages of different types of smoke suction machines are integrated. However, the double-suction type range hood in the related art has a complex structure and a large size.

Disclosure of Invention

The invention mainly aims to provide a range hood, and aims to solve the technical problems of complex structure and huge size of the existing double-suction range hood.

In order to achieve the above object, the range hood provided by the present invention includes:

the cigarette machine main body is provided with a first smoke suction port and a second smoke suction port;

the cover plate assembly comprises a first cover plate corresponding to the first smoking port and a second cover plate corresponding to the second smoking port, and has a first state and a second state, wherein the first cover plate closes the first smoking port and the second cover plate closes the second smoking port in the first state, and the first cover plate opens the first smoking port and the second cover plate opens the second smoking port in the second state;

the transmission assembly comprises a first transmission piece connected with the first cover plate and a second transmission piece connected with the second cover plate;

the driving piece is arranged on the cigarette machine main body, an output shaft of the driving piece is connected with the first transmission piece and the second transmission piece of the transmission assembly and is used for driving the first transmission piece and the second transmission piece to move, and then the cover plate assembly is switched between the first state and the second state.

According to the technical scheme, the first cover plate and the second cover plate are driven to move by the driving piece, so that the first smoke suction opening and the second smoke suction opening are opened and closed, and compared with the scheme of arranging the two driving pieces, the production cost of the range hood can be reduced, the structural design of the range hood is simplified, and the miniaturization of the range hood is realized. Meanwhile, the first transmission part for driving the first cover plate to move and the second transmission part for driving the second cover plate to move are directly connected with the output shaft of the driving part, compared with the scheme that the first transmission part is connected with the output shaft of the driving part in the related art, the energy loss of the output shaft of the driving part when being transmitted to the first transmission part and the second transmission part can be reduced, and smooth opening and closing of the first cover plate and smooth opening and closing of the second cover plate are ensured. And because the scheme of the application can reduce the loss of the output energy of the driving piece, compared with the related art, the driving piece with low cost and small size can meet the use requirement.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a perspective view of an embodiment of a range hood provided by the invention in a second state;

fig. 2 is a perspective view of a part of the structure of the range hood shown in fig. 1;

fig. 3 is a perspective view of the range hood shown in fig. 1 in a first state;

fig. 4 is a perspective view of a part of the structure of the range hood shown in fig. 1 in a first state;

fig. 5 is a perspective view of a transmission assembly and a mounting bracket in the range hood shown in fig. 1;

fig. 6 is a perspective view of the transmission assembly and mounting bracket of the range hood shown in fig. 1 in another orientation;

fig. 7 is a perspective view of an alternative to the transmission assembly and mounting bracket of the range hood shown in fig. 5;

fig. 8 is a partial structural perspective view of the cover plate assembly in the range hood shown in fig. 1;

fig. 9 is a perspective view of a cover plate assembly, a transmission assembly and a mounting frame in the range hood shown in fig. 1;

fig. 10 is a perspective view of still another embodiment of a range hood according to the present invention in a second state;

fig. 11 is a perspective view of a part of the structure of the range hood shown in fig. 10;

fig. 12 is a perspective view of a part of the structure of the range hood shown in fig. 10;

fig. 13 is a perspective view of the range hood shown in fig. 10 in a first state;

fig. 14 is a perspective view of still another embodiment of a range hood according to the present invention in a second state;

Fig. 15 is a perspective view of a part of the structure of the range hood shown in fig. 14;

fig. 16 is a perspective view of a part of the structure of the range hood shown in fig. 14 in a first state;

fig. 17 is a perspective view of the range hood shown in fig. 14 in a first state;

fig. 18 is a perspective view of yet another alternative of the transmission assembly and mounting bracket of the range hood shown in fig. 5;

fig. 19 is a perspective view of a first transmission member and a mounting bracket in the range hood shown in fig. 18;

fig. 20 is a perspective view of a second transmission member and a mounting bracket in the range hood shown in fig. 18;

fig. 21 is a perspective view of the transmission assembly and mounting bracket of the range hood of fig. 18 in yet another orientation;

fig. 22 is a perspective view of a portion of the structure of the transmission assembly and the mounting bracket of the range hood shown in fig. 14;

fig. 23 is a schematic view of the transmission principle of the transmission assembly and the mounting frame in the range hood shown in fig. 22;

fig. 24 is a perspective view of a part of the structure of the range hood shown in fig. 10;

fig. 25 is a perspective view of the range hood shown in fig. 10 in a second state.

Reference numerals illustrate: 1. a range hood; 11. a tobacco machine main body; 111. a housing; 112. a fan assembly; 113. an inner cavity; 114. a smoking port; 1141. a first smoke suction port; 1142. a second smoking port; 12. a cover plate assembly; 121. a first cover plate; 1211. a first edge; 1212. a second edge; 1213. a third edge; 122. a second cover plate; 123. a first screen; 1231. a mesh; 124. a connecting plate; 125. a smoke guiding cavity; 126. a first connector; 1261. a second connecting piece; 127. a second connector; 13. a driving member; 131. a motor; 14. a transmission assembly; 141. a first transmission member; 1411. a first link; 1412. a second link; 1413. a third link; 1414. a first sub-section; 1415. a second sub-section; 14151. a clamping protrusion; 1416. a third sub-section; 1417. a fourth sub-section; 14171. a first surface; 1418. an avoidance zone; 142. a second transmission member; 1421. a slide rail, 1422, and a sliding portion; 1423. a fifth link; 1424. a sixth link; 1425. a slide block; 1426. a first plate body; 1427. a second plate body; 1428. a first panel; 1429. a second panel; 1431. a first connection location; 1432. a second connection location; 1433. a third connection site; 1434. a fourth connection site; 1435. a fifth connection site; 1436. a sixth connection site; 1437. a seventh connection bit; 1438. an eighth connection bit; 144. a baffle; 1441. a first opening; 145. a first push rod; 146. a second push rod; 15. a mounting frame; 151. a first structure portion; 152. a second structure portion; 153. a limit structure; 154. a mounting plate; 1541. third, 1542, fourth plate surfaces; 155. a bracket; 1551. a first portion; 1552. a second portion; 1553. a bending part; 156. a fifth panel; 157. a sixth panel; 16. an elastic member; 17. a transmission rod; p, a hearth plane.

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present application, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical solutions of the embodiments of the present application may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present application.

Example 1

The embodiment of the application provides a range hood 1. Referring to fig. 1 and 2, the range hood 1 includes a hood body 11, and specifically, the hood body 11 includes a housing 111 and a fan assembly 112 (shown in fig. 10). The shell 111 is formed with an inner cavity 113 and a smoke suction port 114 communicated with the inner cavity 113, the fan assembly 112 is positioned in the inner cavity 113 and is used for generating negative pressure suction force, so that oil smoke can be sucked into the inner cavity 113 through the smoke suction port 114, and the kitchen is not filled with the oil smoke, and the cooking experience of a user can be improved.

The range hood 1 further includes a cover assembly 12 and a driving member 13, where the cover assembly 12 is disposed corresponding to the smoke suction port 114, and the cover assembly 12 has a first state and a second state, referring to fig. 3 and 4, in which the cover assembly 12 closes the smoke suction port 114. Referring to fig. 1 and 2, the lid assembly 12 in the second state opens the smoking opening 114. The driving member 13 is connected to the cover assembly 12 for controlling the cover assembly 12 to switch between the first state and the second state. For example, when the range hood 1 is idle, the driving member 13 can control the cover assembly 12 to be in the first state to close the smoke suction opening 114, so as to prevent dust from entering the inner cavity 113 of the housing 111, or prevent the fan assembly 112 from being damaged due to exposure. When the range hood 1 is in operation, the driving member 13 can control the cover assembly 12 to be in the second state to open the smoke suction opening 114, so that the oil smoke can be sucked into the inner cavity 113 through the smoke suction opening 114 after the fan assembly 112 is started.

The smoke suction port 114 may be opened not only to suck the smoke during cooking but also to purify the indoor air during not cooking. Of course, a vent may be additionally provided on the housing 111 to purify indoor air therethrough, which is not limited in the embodiment of the present application.

More specifically, referring to fig. 1 to 4, the smoking openings 114 may be generally divided into a first smoking opening 1141 and a second smoking opening 1142, and the cover assembly 12 may include a first cover plate 121 corresponding to the first smoking opening 1141 and a second cover plate 122 corresponding to the second smoking opening 1142, where the first cover plate 121 closes the first smoking opening 1141 and the second cover plate 122 closes the second smoking opening 1142 in a first state, and the first cover plate 121 opens the first smoking opening 1141 and the second cover plate 122 opens the second smoking opening 1142 in a second state. At this time, the range hood 1 further includes a transmission assembly 14 for transmitting the force of the driving member 13 to the first cover plate 121 and the second cover plate 122.

Specifically, referring to fig. 4 and 5, the transmission assembly 14 includes a first transmission member 141 connected to the first cover plate 121 and a second transmission member 142 connected to the second cover plate 122, and the output shaft of the driving member 13 may be connected to the first transmission member 141 and the second transmission member 142, so as to control the cover plate assembly 12 to switch between the first state and the second state by driving the first transmission member 141 and the second transmission member 142.

According to the application, the first cover plate 121 and the second cover plate 122 are driven to move by one driving piece 13, so that the first smoke suction port 1141 and the second smoke suction port 1142 are opened and closed, and compared with the scheme of arranging the two driving pieces 13, the production cost of the range hood 1 can be reduced, the structural design of the range hood 1 is simplified, and the miniaturization of the range hood 1 is realized. Meanwhile, the first transmission member 141 driving the first cover plate 121 to move and the second transmission member 142 driving the second cover plate 122 to move are both directly connected with the output shaft of the driving member 13, compared with the scheme adopted in the related art that the first transmission member 141 is connected with the output shaft of the driving member 13, the energy loss when the output shaft of the driving member 13 is transmitted to the first transmission member 141 and the second transmission member 142 can be reduced, and smooth opening and closing of the first cover plate 121 and smooth opening and closing of the second cover plate 122 are ensured. In addition, the present application can reduce the output energy loss of the driving member 13, so that the driving member 13 with low cost and small size can meet the use requirement compared with the related art.

Alternatively, the first transmission member 141 may be configured to rotate the first cover 121 relative to the opening end surface of the first smoke suction port 1141 when the driving member 13 drives to move, so as to close the first smoke suction port 1141 or open the first smoke suction port 1141. That is, the first cover 121 is turned over to open and close the first smoke suction port 1141, which can achieve a compact design of the range hood 1, compared to the case where the first cover 121 is translated in a direction parallel to the opening end surface to open and close the first smoke suction port 1141.

For example, referring to fig. 1 again, the inner surface of the first cover plate 121 has a first edge 1211 far from the second cover plate 122, and the first cover plate 121 can rotate about the first edge 1211 as a rotation axis to open and close the first smoke suction port 1141. So, during the use, install lampblack absorber 1 in top of the kitchen range plane p, first smoke absorbing port 1141 keeps away from top of a kitchen range plane p setting, second smoke absorbing port 1142 is close to top of a kitchen range plane p setting, at this moment, the oil smoke of top of a kitchen range plane p side under the second state can receive the interior face of the first apron 121 of upset to block and enter into in the first smoke absorbing port 1141, that is, the first apron 121 of upset opening can lead the transmission of oil smoke, can promote the smoking volume of first smoke absorbing port 1141, promote the result of use of lampblack absorber 1.

Alternatively, the first transmission member 141 may be substantially in a four bar mechanism to transmit the rotation of the first cover plate 121. Specifically, referring to fig. 5, the range hood 1 may include a first structural portion 151 and a second structural portion 152 installed in the hood body 11 and spaced apart from each other. The first transmission member 141 may include a first link 1411, a second link 1412 and a third link 1413, wherein the first link 1411 has a first connection position 1431 and a second connection position 1432 which are spaced apart; one end of the second link 1412 is rotatably connected to the first link 1411 at a first connection position 1431, and the other end is rotatably connected to the first structure portion 151; one end of the third link 1413 is rotatably connected to the second connection point 1432 of the first link 1411, and the other end is rotatably connected to the second structure 152. One of the first link 1411, the second link 1412 and the third link 1413 may be mounted with the first cover plate 121, and the other of the first link 1411, the second link 1412 and the third link 1413 may be connected with an output shaft of the driving member 13, for rotating under the driving of the driving member 13, so that the first cover plate 121 rotates relative to an opening end surface of the first smoke suction port 1141, thereby realizing that the first cover plate 121 closes the first smoke suction port 1141 or opens the first smoke suction port 1141.

Wherein, one of the first link 1411, the second link 1412 and the third link 1413 mounts the first cover plate 121, may be: any one of the first link 1411, the second link 1412, and the third link 1413 is attached to the first cover plate 121 and connected thereto by screws or the like. In the embodiment of the present application, the first link 1411 is attached to the first cover 121 and connected by a screw. The other of the first link 1411, the second link 1412, and the third link 1413 is connected to the output shaft of the driving element 13, and may be: any one of the first connection position 1431 of the first link 1411, the second connection position 1432 of the first link 1411, the second link 1412 near the first connection position 1431, the second link 1412 near the first structure portion 151, the third link 1413 near the second connection position 1432, and the third link 1413 near the second structure portion 152 is fixedly connected with the output shaft of the driving member 13, so as to be driven by the output shaft of the driving member 13 to rotate. In the embodiment of the present application, the second connecting rod 1412 is fixedly connected to the output shaft of the driving member 13 near the first structural portion 151.

The first structure portion 151 and the second structure portion 152 may be directly mounted on the housing 111 of the cigarette machine body 11 to achieve fixation in the cigarette machine body 11. At least one of the first structure portion 151 and the second structure portion 152 may be attached to the mount 15 in the range hood main body 11, and the driver 13 may be attached to the mount 15.

Alternatively, the first and second structural portions 151 and 152 may be only partial structures in the mounting bracket 15. Specifically, a part of the structure of the mounting bracket 15 may be defined as the first structural portion 151 and a part of the structure may be defined as the second structural portion 152 without additionally providing the first structural portion 151 and the second structural portion 152, so as to simplify the structure of the range hood 1.

Optionally, a limiting structure 153 (shown in fig. 19) may be disposed on the mounting frame 15, and the limiting structure 153 may be used to limit the movement of the first cover plate 121 to the second state, so that the first cover plate 121 is more accurately opened to the second state.

Alternatively, the limiting structure 153 may be a folding edge. That is, the stopper 153 is formed by folding over a part of the mounting frame 15. The limit structure 153 may be provided corresponding to the second link 1412 and/or the third link 1413. Optionally, a catch may be provided on the second link 1412 and/or the third link 1413, which indicates that the first cover 121 moves to the second state when the catch moves to abut the limit structure 153. Alternatively, the movement of the first cover plate 121 to the first state is indicated when, of the edges of the inner plate surface of the first cover plate 121, a part of the edges close to the second cover plate 122 contacts the opening end surface of the first smoke suction port 1141.

Alternatively, the second transmission member 142 may be configured to drive the second cover 122 to move in a direction parallel to the opening end surface of the second smoke-absorbing port 1142 when the driving member 13 drives to move, so as to close the second smoke-absorbing port 1142 or open the second smoke-absorbing port 1142. Alternatively, the second cover plate 122 may be moved in a direction approaching the first cover plate 121 to effect opening of the second smoke-absorbing ports 1142, and moved in a direction away from the first cover plate 121 to effect closing of the second smoke-absorbing ports 1142.

Note that, the smoking port 114 may be split into a first smoking port 1141 and a second smoking port 1142 that are independent of each other, that is, the first smoking port 1141 is not communicated with the second smoking port 1142. Referring again to fig. 2, the smoking port 114 may be a whole, and a part of the smoking port 114 is defined as a first smoking port 1141 and a part of the smoking port 114 is defined as a second smoking port 1142, that is, the first smoking port 1141 communicates with the second smoking port 1142. When the smoking openings 114 are integral, if the first driving member 141 drives the first cover 121 to rotate about the first edge 1211 thereof as the rotation axis, the second driving member 142 drives the second cover 122 to move along the direction approaching the first cover 121, at this time, the exposed area of the smoking openings 114 on the side of the second cover 122 approaching the first cover 121 may be defined as the first smoking opening 1141, and the exposed area of the second cover 122 on the side of the second cover 122 far from the first cover 121 may be defined as the second smoking opening 1142.

Alternatively, the second transmission member 142 may be substantially a crank block mechanism to implement the movement driving of the second cover 122. Specifically, referring to fig. 5, the second transmission member 142 may include a sliding rail 1421, a sliding portion 1422, a fifth link 1423, and a sixth link 1424, where the sliding rail 1421 is disposed on the mounting bracket 15 and extends along a direction parallel to the opening end surface of the second smoke suction port 1142. The sliding portion 1422 is connected to the sliding rail 1421 and can slide along the length direction of the sliding rail 1421, and the second cover 122 is mounted on the sliding portion 1422. One end of the fifth connecting rod 1423 is rotationally connected with the sliding portion 1422, the other end is rotationally connected with one end of the sixth connecting rod 1424, the other end of the sixth connecting rod 1424 is connected with the output shaft of the driving member 13, and the sixth connecting rod 1424 is used for rotating under the driving of the driving member 13, so that the second cover plate 122 slides along the length direction of the sliding rail 1421 along with the sliding portion 1422, and further the second cover plate 122 closes the second smoke suction port 1142 or opens the second smoke suction port 1142.

Further alternatively, in one possible solution, referring to fig. 5 and 6, the sliding portion 1422 may include a sliding block 1425, a first plate 1426, and a second plate 1427, where the sliding block 1425 is located in the sliding rail 1421 and can slide along the length direction of the sliding rail 1421. The first plate 1426 has a first plate 1428 and a second plate 1429 that are distributed in opposite directions, the slider 1425 is located on a side of the first plate 1428 of the first plate 1426 and connected to the first plate 1426, and the second cover 122 is located on a side of the second plate 1429 of the first plate 1426 and connected to the first plate 1426. The second plate 1427 is connected to the first plate 1426 and extends in a direction away from the second plate 1429 toward the first plate 1428, and the second plate 1427 is rotatably connected to the fifth link 1423. That is, the sliding block 1425 and the second plate 1427 are disposed on the side of the first plate 1428 of the first plate 1426, so that the size of the sliding portion 1422 along the direction perpendicular to the first plate 1428 can be reduced, and the compactness of the sliding portion 1422 can be improved.

Alternatively, the mounting frame 15 may include a mounting plate 154 and a bracket 155, where the mounting plate 154 is disposed corresponding to the first smoke suction opening 1141, the mounting plate 154 may have a plate structure substantially perpendicular to the opening end surface of the first smoke suction opening 1141, and the driving member 13, the first structural portion 151 and the second structural portion 152 are disposed on the plate surface of the mounting plate 154.

Further alternatively, the mounting plate 154 may have a third plate surface 1541 and a fourth plate surface 1542 that are disposed opposite to each other, and the first structure portion 151, the second structure portion 152, and the first transmission member 141 may be located on a side of the third plate surface 1541 of the mounting plate 154. The driver 13 and the bracket 155 may be located on a side of the mounting plate 154 where the fourth plate 1542 is located.

The bracket 155 may include a first portion 1551 disposed corresponding to the first smoke suction opening 1141, and a second portion 1552 disposed corresponding to the second smoke suction opening 1142, where the first portion 1551 is connected to the mounting plate 154, the second portion 1552 is connected to the first portion 1551, and a portion of the second portion 1552 close to the second smoke suction opening 1142 may be bent substantially toward the direction of the third plate 1541 away from the fourth plate 1542 to form a bent portion 1553. At this time, the sliding rail 1421 of the second transmission member 142 may be mounted on the bending portion 1553 of the second portion 1552.

In yet another possible solution, referring to fig. 7, the sliding portion 1422 includes a sliding block 1425, a first plate 1426 and a second plate 1427, where the sliding block 1425 is located in the sliding rail 1421 and can slide along the length direction of the sliding rail 1421. The first plate 1426 has a first plate 1428 and a second plate 1429 that are opposite to each other, and the second cover 122 is located on a side of the first plate 1426 where the second plate 1429 is located and is connected to the first plate 1426. The second plate 1427 is connected to the first plate 1426 and extends in a bending manner in a direction away from the second plate 1429 toward the first plate 1428; along the direction parallel to the first plate surface 1428, the first plate body 1426 and the sliding block 1425 are located at two opposite sides of the second plate body 1427, the second plate body 1427 is connected with the sliding block 1425, and the second plate body 1427 is rotatably connected with the fifth connecting rod 1423. The first plate 1426 and the sliding blocks 1425 are distributed on two opposite sides of the second plate 1427 along the direction parallel to the first plate 1428, so that the size of the sliding portion 1422 along the direction perpendicular to the first plate 1428 can be reduced, and the structural compactness of the sliding portion 1422 is improved.

Further alternatively, the fifth link 1423, the slide rail 1421, and the slider 1425 may be located on the same side of the second plate 1427 in a direction parallel to the first plate 1428.

Optionally, the range hood 1 may further include an elastic member 16, where the elastic member 16 may extend along the length direction of the sliding rail 1421, and two ends of the elastic member are respectively connected to the mounting frame 15 and the sliding portion 1422. The sliding portion 1422 is connected to the mounting frame 15 through the elastic member 16, so that the weight of the second transmission member 142 and the second cover plate 122 can be transferred to the mounting frame 15 through the elastic member 16, the acting force required by the motor 131 for maintaining the balance of the second cover plate 122 can be reduced, and the motor 131 with small size and low cost can be selected. Alternatively, the elastic members 16 may be distributed along the vertical direction, so as to maximally offset the gravity of the second cover 122, thereby reducing the use cost of the motor 131. The elastic member 16 may be any deformable member such as a spring, which is not limited in this embodiment of the present application.

Alternatively, referring to fig. 8 and 9, in one possible solution, the cover assembly 12 may include a first mesh plate 123 and a connection plate 124, where the first mesh plate 123 is located on a side of an inner plate surface of the first cover plate 121, and a plurality of mesh holes 1231 are provided on the first mesh plate 123. The connection plate 124 is connected between the first mesh plate 123 and the first cover plate 121, and encloses the first mesh plate 123 and the first cover plate 121 to form a smoke guiding cavity 125, the smoke guiding cavity 125 is communicated with the inner cavity 113 of the main body 11 of the cigarette machine, the first mesh plate 123 is located in the main body 11 of the cigarette machine in the first state, the first mesh plate 123 is located outside the main body 11 of the cigarette machine in the second state, and the first smoke suction port 1141 is communicated with the outside through the mesh 1231.

Further alternatively, the first mesh plate 123 and the connection plate 124 may be a unitary structure. The cover assembly 12 may further include a first connector 126, the first connector 126 being connected between the connecting plate 124 and the first cover 121. More specifically, the first connecting member 126 may include a first connecting piece (not shown) that is attached to the inner plate surface of the first cover plate 121, and a second connecting piece 1261 that is attached to the outer circumferential surface of the connecting plate 124, and the first connecting piece is connected to the second connecting piece 1261.

The first connecting member 126 may also be connected to the first transmission member 141 to enable connection of the first cover plate 121 to the first transmission member 141. More specifically, the first connecting member 126 may be connected with the blocking plate 144 to achieve connection of the first cover plate 121 with the first transmitting member 141.

Alternatively, referring to fig. 1 and 2 again, the included angle between the plate surface of the first screen 123 of the range hood 1 and the range plane p in the second state may be greater than or equal to 12 ° and less than or equal to 20 °. Specifically, in the second state, among the edge lines of the plate surface of the first mesh plate 123, the edge line close to the opening end surface of the first smoke suction port 1411 may be located between the edge line far from the opening end surface of the first smoke suction port 1411 and the hob plane p. It can be understood that: in the second state, the panel surface of the first mesh panel 123 is obliquely opened upward, not obliquely opened downward.

In still another possible solution, referring to fig. 10 and 11, the cover assembly 12 may include a first mesh plate 123, where a plurality of mesh holes 1231 are disposed on the first mesh plate 123, and the first mesh plate 123 is disposed corresponding to the first smoking port 1141 and connected to the main body 11 of the cigarette maker. The first smoke suction port 1141 communicates with the outside through the mesh 1231 of the first mesh plate 123 in the second state. Because the first screen 123 is connected to the main body 11 of the cigarette machine, when the first cover 121 is switched between the first state and the second state, the first screen 123 does not move along with the first cover 121, so that the driving force requirement on the driving member 13 can be reduced, and the driving member 13 with small size and low cost can be selected. And the first screen 123 is directly connected with the main body 11 of the cigarette making machine, so that the structural stability of the first screen 123 after long-term use can be ensured, and falling off, scratching and the like can be avoided.

Alternatively, the first mesh plate 123 may be connected to the mounting frame 15 in the main body 11 of the cigarette maker, thereby realizing the mounting of the first mesh plate 123 at the first smoke outlet 1141.

Optionally, the cover assembly 12 may further include a second mesh plate (not shown) disposed at the second smoking port 1142, where the second mesh plate may have mesh openings disposed thereon, and the second mesh plate may be connected to the main body 11 of the cigarette maker. Alternatively, the second mesh panel may be attached to a mounting bracket 15 within the body 11 of the cigarette lighter, thereby enabling the second mesh panel to be mounted at the second smoking port 1142.

In still another possible solution, referring to fig. 14 to 16, no mesh plate may be disposed at each of the first smoke suction port 1141 and the second smoke suction port 1142, so that the smoke may directly enter the inner cavity 113 through the first smoke suction port 1141 and the second smoke suction port 1142.

Optionally, the cover assembly 12 may further include a second connecting member 127, the second connecting member 127 being connected between the second cover 122 and the second transmission member 142. More specifically, the second connecting member 127 may be attached and connected to the inner plate surface of the second cover plate 122, and the second connecting member 127 may be connected to the sliding portion 1422 of the second transmission member 142.

Alternatively, the driving member 13 may include a motor 131, and an output shaft of the driving member 13 may correspond to an output shaft of the motor 131. The motor 131 has a third state and a fourth state, in the third state, the motor 131 drives the first transmission member 141 and the second transmission member 142 to move so that the cover plate assembly 12 is located in the first state, in the fourth state, the motor 131 drives the first transmission member 141 and the second transmission member 142 to move so that the cover plate assembly 12 is located in the second state, and when the motor 131 is switched from the third state to the fourth state, the rotation stroke of the output shaft of the motor 131 can be greater than or equal to 85 ° and less than or equal to 95 °. The rotation stroke of the output shaft of the motor 131 will affect the rotation stroke of the first cover plate 121 when the first cover plate 121 is switched from the first state to the second state, that is, the opening degree of the first cover plate 121 to the first smoke suction port 1141 is affected, and the rotation stroke of the output shaft of the motor 131 is reasonably limited, so that a good smoking effect at the first smoke suction port 1141 can be ensured on the premise of reducing the power consumption of the motor 131.

Alternatively, when the first cover plate 121 is switched from the first state to the second state, the rotational stroke of the first cover plate 121 with respect to the opening end surface of the first smoking port 1141 may be greater than or equal to 65 ° and less than or equal to 75 °. Alternatively, when the second cover 122 is switched from the first state to the second state, the moving stroke of the second cover 122 relative to the opening end surface of the second smoking port 1142 may be greater than or equal to 100mm and less than or equal to 110mm.

Alternatively, the number of the transmission assemblies 14 may be two, the inner plate surface of the first cover plate 121 has a first edge 1211 far from the second cover plate 122, a second edge 1212 located at one side of the first edge 1211, and a third edge 1213 located at the other side of the first edge 1211 and spaced apart from the second edge 1212, and the two transmission assemblies 14 are located at one side of the second edge 1212 of the first cover plate 121 and one side of the third edge 1213 of the first cover plate 121, respectively.

The driving member 13 may be disposed corresponding to one of the transmission assemblies 14 and connected to the first transmission member 141 and the second transmission member 142 of one of the transmission assemblies 14, where the two transmission assemblies 14 are in transmission connection through the transmission rod 17. By providing the transmission assemblies 14 on both sides of the first cover plate 121, the stability during the movement of the first cover plate 121 and the stability during the movement of the second cover plate 122 can be improved.

Both ends of the transmission rod 17 may be respectively mounted on the two transmission assemblies 14 to achieve synchronous movement of the two transmission assemblies 14. The two drive assemblies 14 are identical in construction and the two drive assemblies 14 may be arranged in a generally mirror image. Alternatively, when the number of the transmission assemblies 14 is two, the number of the mounting frames 15 may be two, and each of the mounting frames 15 is provided corresponding to one of the transmission assemblies 14.

The drive rod 17 is located in the interior cavity 113. Alternatively, referring to fig. 2 and 4, the transmission rod 17 may be disposed above the cover plate assembly 12; referring to fig. 12 and 15, the driving rod 17 may correspond to a lower position of the cover assembly 12. Alternatively, referring to fig. 12, the drive rod 17 may be disposed adjacent the cover plate assembly 12; referring to fig. 15, the drive rod 17 may be disposed remotely from the cover plate assembly 12. The design form of the transmission rod 17 is various and can be flexibly adjusted according to specific requirements.

Optionally, referring to fig. 17, in the first state, the outer surface of the first cover plate 121 and the outer surface of the second cover plate 122 may be located on the same plane, so as to improve the flatness and the aesthetic property of the appearance of the range hood 1, and facilitate cleaning.

Alternatively, the gap between the first cover plate 121 and the second cover plate 122 in the first state may be greater than or equal to 3mm and less than or equal to 5mm, so as to achieve smaller gap between the first cover plate 121 and the second cover plate 122 on the premise of ensuring that the cover plate assembly 12 can be opened and closed smoothly.

Example two

Referring to fig. 18 to 21, the range hood of the second embodiment is basically the same as the range hood of the first embodiment in that: in the first embodiment, the first link 1411, the second link 1412, and the third link 1413 of the first transmission member 141 constitute a four-bar linkage together with the mount 15. In this embodiment, the first transmission member 141 and the mounting frame 15 may together form a six-bar mechanism to realize rotation transmission of the first cover 121.

Specifically, the second link 1412 may be split into a first sub-portion 1414 and a second sub-portion 1415 distributed along a length direction thereof, one end of the first sub-portion 1414 is rotatably connected to the first connection position 1431 of the first link 1411, the other end of the first sub-portion 1414 is rotatably connected to one end of the second sub-portion 1415, and the other end of the second sub-portion 1415 is rotatably connected to the first structural portion 151. The third link 1413 may be split into a third sub-portion 1416 and a fourth sub-portion 1417 distributed along a length direction thereof, one end of the third sub-portion 1416 is rotatably connected to the second connection position 1432 of the first link 1411, the other end of the third sub-portion 1416 is rotatably connected to one end of the fourth sub-portion 1417, and the other end of the fourth sub-portion 1417 is rotatably connected to the second structure portion 152. The middle portion of the first sub-portion 1414 is also rotatably coupled to the middle portion of the fourth sub-portion 1417. At this time, the first cover plate 121 is mounted on the first link 1411, and one end of the second sub-portion 1415 away from the first sub-portion 1414 or one end of the fourth sub-portion 1417 away from the third sub-portion 1416 is connected to the output shaft of the driving member 13.

Taking the example that the end of the second sub-portion 1415 far from the first sub-portion 1414 is connected to the output shaft of the driving member 13, when the first cover 121 is switched from the first state to the second state, the second sub-portion 1415 not only drives the end of the third sub-portion 1416 far from the fourth sub-portion 1417 to move towards the outside of the first smoke-absorbing port 1141, but also drives the end of the first sub-portion 1414 far from the second sub-portion 1415 to move towards the outside of the first smoke-absorbing port 1141 under the driving of the driving member 13. That is, when the first cover 121 is switched from the first state to the second state, under the driving of the driving member 13, the first connection position 1431 and the second connection position 1432 of the first link 1411 connected to the first cover 121 move towards the outside of the first smoke suction port 1141, so that the first cover 121 is not obstructed by the casing 111 of the main body 11 of the kitchen ventilator in the outward moving process, and even if the inner plate surface of the first cover 121 is attached to the opening end surface of the first smoke suction port 1141 in the first state, the first cover 121 can be smoothly opened, and the structural compactness of the kitchen ventilator 1 can be improved.

Optionally, the fourth sub-portion 1417 has a first surface 14171 and a second surface (not shown) that are oppositely disposed along the rotation axis thereof, and the first link 1411, the third sub-portion 1416, and the first sub-portion 1414 are all located on a side of the first surface 14171 of the fourth sub-portion 1417. The first transmission member 141 may further include a baffle 144, where the baffle 144 is located on the same side of the first sub-portion 1414 as the fourth sub-portion 1417 and connects to the first link 1411. The fourth sub-portion 1417 and the baffle plate 144 are arranged on one side, the first connecting rod 1411, the third sub-portion 1416 and the first sub-portion 1414 are arranged on one side, when the range hood 1 is assembled, one side where the baffle plate 144 and the fourth sub-portion 1417 are arranged towards the outer side of the range hood 1, one side where the first connecting rod 1411, the third sub-portion 1416 and the first sub-portion 1414 are arranged is arranged on the inner side, and the structure is more attractive due to the shielding of the baffle plate 144. Note that the second sub-portion 1415 may be located on the same side as the fourth sub-portion 1417 and the baffle 144, which is not limited in the embodiment of the present application.

Alternatively, the thickness of the fourth sub-portion 1417, the thickness of the baffle 144, and the thickness of the second sub-portion 1415 may be substantially equal. The thickness of the third sub-portion 1416 and the thickness of the first sub-portion 1414 may be substantially equal, so that the thickness of the first transmission member 141 is relatively thin and light, and the structure is relatively neat and compact. The thickness of the fourth sub-portion 1417 may be a length dimension of the fourth sub-portion 1417 along the rotation axis direction thereof, and the thickness of the baffle 144, the thickness of the second sub-portion 1415, the thickness of the third sub-portion 1416, and the thickness of the first sub-portion 1414 may be respective length dimensions along the rotation axis direction of the fourth sub-portion 1417.

Further alternatively, the baffle 144 may be provided with a first opening 1441, and the fourth sub-portion 1417 is rotatably connected to one end of the third sub-portion 1416 to extend to the first opening 1441. The fourth sub-portion 1417 is extended to the first opening 1441 of the baffle 144, so that a gap between the baffle 144 and the fourth sub-portion 1417 can be reduced when the first cover plate 121 is opened, a pinch phenomenon can be avoided, and the safety of the range hood 1 is improved, and meanwhile, the range hood has a certain aesthetic property.

Alternatively, the limit structure 153 of the mounting frame 15 may be provided corresponding to the second sub-portion 1415 and/or the fourth sub-portion 1417. In the embodiment of the application, the limiting structure 153 is disposed corresponding to the second sub-portion 1415, and the second sub-portion 1415 is provided with the clamping protrusion 14151, and when the clamping protrusion 14151 of the second sub-portion 1415 moves to abut against the limiting structure 153, it indicates that the first cover plate 121 moves to the second state.

Example III

Referring to fig. 22 to 25, the range hood of the third embodiment has substantially the same structure as the range hood of the first embodiment, except that: in the first embodiment, the first link 1411, the second link 1412, and the third link 1413 of the first transmission 141 constitute a four-bar mechanism together with the mount 15, and one of the first link 1411, the second link 1412, and the third link 1413 is connected with the output shaft of the driving member 13. In this embodiment, the first transmission member 141 further includes a pushing member, and one of the first link 1411, the second link 1412, and the third link 1413 is connected to the output shaft of the driving member 13 through the pushing member.

Specifically, the second link 1412 mounts the first cover plate 121, the pusher includes a first push rod 145 and a second push rod 146, the first push rod 145 is rotatably connected to a third connection position 1433 of the third link 1413, the third connection position 1433, a fourth connection position 1434 where the third link 1413 is rotatably connected to a second connection position 1432 of the first link 1411, and a fifth connection position 1435 where the third link 1413 is rotatably connected to the second structure portion 152 form a triangle; one end of the second push rod 146 is rotatably connected with one end of the first push rod 145 far away from the third connection position 1433, and the other end is connected with the output shaft of the driving member 13.

The second push rod 146 is driven by the output shaft of the driving member 13 to push the first push rod 145 to move, and the first push rod 145 further drives the third link 1413 to rotate around the fifth connection position 1435, so that the second link 1412 forming a four-bar linkage together with the third link 1413 rotates around the first structure portion 151, thereby opening and closing the first smoke suction port 1411 of the first cover plate 121.

Alternatively, in connection with fig. 22, the third link 1413 may be generally of a tripod type with a hollow interior; referring to fig. 24, the third link 1413 may be generally curved knife shaped; the embodiment of the present application is not limited to the specific shape of the third link 1413.

Alternatively, the second push rod 146 in the first transmission member 141 may share the same component as the sixth link 1424 of the second transmission member 142. Specifically, if the second push rod 146 and the sixth link 1424 share the same component, the component has a sixth connection location 1436, a seventh connection location 1437, and an eighth connection location 1438 that are spaced apart from each other, where the sixth connection location 1436 is connected to the output shaft of the driving member 13, and where the seventh connection location 1437 is rotatably connected to the end of the first push rod 145 remote from the third link 1413, such that a portion between the sixth connection location 1436 and the seventh connection location 1437 is configured as the second push rod 146. The eighth connecting position 1438 is rotatably connected to an end of the fifth link 1423 remote from the sliding portion 1422 such that a portion between the sixth connecting position 1436 and the eighth connecting position 1438 is configured as a sixth link 1424.

Further alternatively, the sixth connection bit 1436, the seventh connection bit 1437, and the eighth connection bit 1438 may be located on the same line, or may form a triangle, which is not limited by the embodiment of the present application.

Alternatively, in connection with fig. 22, the limiting structure 153 of the mounting frame 15 may be a flange. Specifically, the edge portion of the mounting frame 15 may be bent to form a limiting structure 153, and the limiting structure 153 is used for limiting a limiting position of the second push rod 146 rotating clockwise along with the output shaft of the driving member 13 and a limiting position of rotating counterclockwise.

Alternatively, the mounting 15 may have a substantially plate-like structure. The mounting frame 15 has a fifth plate 156 and a sixth plate 157 which are distributed oppositely, and the first push rod 145, the second push rod 146, the third connecting rod 1413 and the second transmission member 142 in the first transmission member 141 can be located on one side of the fifth plate 156 of the mounting frame 15; the first link 1411, the second link 1412, and the driving member 13 in the first transmission member 141 may be located at a side of the sixth plate surface 157 of the mounting bracket 15.

Alternatively, second link 1412 may be generally hooked such that second link 1412 defines a clear section 1418. In this way, when the first transmission member 141 drives the first cover 121 to turn over and open, the avoiding section 1418 of the second link 1412 can avoid the housing 111, so that the movement of the first transmission member 141 is smoother.

The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the specification and drawings of the present invention or direct/indirect application in other related technical fields are included in the scope of the present invention.

Claims

1. A range hood, comprising:

the transmission assembly comprises a first transmission piece connected with the first cover plate and a second transmission piece connected with the second cover plate; and

2. The range hood according to claim 1, wherein the first transmission member is configured to drive the first cover plate to rotate relative to the opening end face of the first smoke suction port when the driving member drives to move, so as to close the first smoke suction port or open the first smoke suction port.

3. The range hood of claim 2 further comprising first and second structural portions mounted in the hood body and spaced apart, the first transmission member comprising:

the first connecting rod is provided with a first connecting position and a second connecting position which are arranged at intervals;

one end of the second connecting rod is rotationally connected with the first connecting position of the first connecting rod, and the other end of the second connecting rod is rotationally connected with the first structural part; and

one end of the third connecting rod is rotationally connected with the second connecting position of the first connecting rod, and the other end of the third connecting rod is rotationally connected with the second structural part;

one of the first connecting rod, the second connecting rod and the third connecting rod is provided with the first cover plate, the other one of the first connecting rod, the second connecting rod and the third connecting rod is connected with an output shaft of the driving piece and used for rotating under the driving of the driving piece, so that the first cover plate rotates relative to the opening end face of the first smoke suction port, and the first cover plate is further used for closing the first smoke suction port or opening the first smoke suction port.

4. A range hood according to claim 3, wherein,

the second connecting rod comprises a first sub-part and a second sub-part which are distributed along the length direction of the second connecting rod, one end of the first sub-part is rotationally connected with the first connecting position of the first connecting rod, the other end of the first sub-part is rotationally connected with one end of the second sub-part, and the other end of the second sub-part is rotationally connected with the first structural part;

the third connecting rod comprises a third sub-part and a fourth sub-part which are distributed along the length direction of the third connecting rod, one end of the third sub-part is rotationally connected with the second connecting position of the first connecting rod, the other end of the third sub-part is rotationally connected with one end of the fourth sub-part, and the other end of the fourth sub-part is rotationally connected with the second structural part; the middle part of the first sub-part is also rotationally connected with the middle part of the fourth sub-part;

the first cover plate is arranged on the first connecting rod, and one end of the second sub-part, which is far away from the first sub-part, or one end of the fourth sub-part, which is far away from the third sub-part, is connected with an output shaft of the driving piece.

5. The range hood of claim 4 wherein the fourth sub-portion has a first surface and a second surface disposed opposite each other along a direction of a rotational axis thereof, the first link, the third sub-portion, and the first sub-portion are all located on a side of the fourth sub-portion where the first surface is located, the first transmission member further comprising:

The baffle, with the fourth sub-portion is located the homonymy of first sub-portion and connect first connecting rod, be provided with first opening on the baffle, the fourth sub-portion rotates to connect the one end of third sub-portion extends to first opening.

6. The range hood of claim 3 wherein the second link mounts the first cover plate, the first transmission further comprising:

the first push rod is rotationally connected with a third connecting position of the third connecting rod, the third connecting position, a fourth connecting position of the third connecting rod rotationally connected with the second connecting position and a fifth connecting position of the third connecting rod rotationally connected with the second structural part form a triangle; and

and one end of the second push rod is rotationally connected with one end of the first push rod far away from the third connecting position, and the other end of the second push rod is connected with the output shaft of the driving piece.

7. The range hood of any one of claims 3 to 6 wherein the transmission assembly further comprises:

the mounting bracket is located in the cigarette machine main body and connected with the cigarette machine main body, and the driving piece, the first structure part and the second structure part are all mounted on the mounting bracket.

8. The range hood according to claim 7, wherein the second transmission member is configured to drive the second cover plate to move in a direction parallel to an opening end face of the second smoke suction port when the driving member drives the second cover plate to move so as to close or open the second smoke suction port.

9. The range hood of claim 8 wherein the second transmission member comprises:

the sliding rail is arranged on the mounting frame and extends along the direction parallel to the opening end face of the second smoking opening;

the sliding part is connected with the sliding rail and can slide along the length direction of the sliding rail, and the second cover plate is installed on the sliding part;

one end of the fifth connecting rod is rotationally connected with the sliding part; and

and one end of the sixth connecting rod is rotationally connected with one end of the fifth connecting rod, which is far away from the sliding part, and the other end of the sixth connecting rod is connected with the output shaft of the driving piece, and the sixth connecting rod is used for rotating under the driving of the driving piece, so that the second cover plate slides along the length direction of the sliding rail along with the sliding part, and further the second cover plate is used for closing the second smoke suction port or opening the second smoke suction port.

10. The range hood of claim 9, wherein the sliding portion comprises:

The sliding block is positioned in the sliding rail and can slide along the length direction of the sliding rail;

the sliding block is positioned on one side of the first plate surface of the first plate body and is connected with the first plate body, and the second cover plate is positioned on one side of the second plate surface of the first plate body and is connected with the first plate body; and

the second plate body is connected with the first plate body and bends and extends towards the direction that the first plate surface is far away from the second plate surface, and the second plate body is rotationally connected with the fifth connecting rod.

11. The range hood of claim 9, wherein the sliding portion comprises:

the first plate body is provided with a first plate surface and a second plate surface which are distributed in opposite directions, and the second cover plate is positioned on one side of the first plate body where the second plate surface is positioned and is connected with the first plate body; and

the second plate body is connected with the first plate body and bends and extends towards the direction of the first plate surface away from the second plate surface; along being on a parallel with the direction of first face, first plate body with the slider is located the opposite both sides of second plate body, the second plate body is connected the slider just the second plate body with fifth connecting rod rotates to be connected.

12. The range hood of claim 9, further comprising:

and the elastic piece extends along the length direction of the sliding rail, and two ends of the elastic piece are respectively connected with the mounting frame and the sliding part.

13. The range hood of claim 2, wherein the cover assembly further comprises:

the first screen plate is positioned on one side of the inner plate surface of the first cover plate, and a plurality of meshes are formed in the first screen plate; and

the connecting plate is connected between the first screen plate and the first cover plate, and is enclosed between the first screen plate and the first cover plate to form a smoke guide cavity, the smoke guide cavity is communicated with the inner cavity of the cigarette machine main body, the first screen plate is positioned in the cigarette machine main body in a first state, the first screen plate is positioned outside the cigarette machine main body in a second state, and the first smoking openings are communicated with the outside through the meshes.

14. The range hood of claim 13 wherein the range hood is configured to be mounted above a cooktop plane and wherein the first screen of the range hood in the second state has an angle of greater than or equal to 12 ° and less than or equal to 20 ° from the cooktop plane.

15. The range hood of claim 1, wherein,

the outer plate surface of the first cover plate and the outer plate surface of the second cover plate are positioned on the same plane in the first state; and/or

A gap between the first cover plate and the second cover plate in the first state is greater than or equal to 3mm and less than or equal to 5mm; and/or

The driving piece comprises a motor, an output shaft of the motor is connected with the first transmission piece and the second transmission piece, the motor is provided with a third state and a fourth state, the motor drives the first transmission piece and the second transmission piece to move in the third state so that the cover plate component is located in the first state, the motor drives the first transmission piece and the second transmission piece to move in the fourth state so that the cover plate component is located in the second state, and when the motor is switched from the third state to the fourth state, the rotation stroke of the output shaft of the motor is greater than or equal to 85 degrees and less than or equal to 95 degrees.

16. The range hood according to claim 1, wherein the number of the transmission assemblies is two, the inner plate surface of the first cover plate is provided with a first edge far away from the second cover plate, a second edge positioned on one side of the first edge, and a third edge positioned on the other side of the first edge and spaced from the second edge, the two transmission assemblies are respectively positioned on one side of the second edge of the first cover plate and one side of the third edge of the first cover plate,

The driving piece corresponds one of the transmission components and is connected with the first transmission piece and the second transmission piece of one of the transmission components, and the two transmission components are in transmission connection through a transmission rod.