Smoke hood structure and range hood

Abstract

This utility model belongs to the technical field of kitchen appliances, specifically disclosing a smoke collection hood structure and a range hood. The smoke collection hood structure includes a hood body and a rectifier mesh. The hood body forms a smoke collection chamber with openings at the top and bottom. The front of the hood body is provided with an opening and closing plate for forming the smoke collection chamber. The opening and closing plate has an open state and a closed state that can be switched between each other. The rectifier mesh is located inside the smoke collection chamber and is inserted into or snapped onto the hood body. In the closed state, the opening and closing plate abuts against the rectifier mesh to fix the rectifier mesh to the hood body. In the open state, the opening and closing plate is detached from the rectifier mesh. No bolts or other locking parts are needed when fixing the rectifier mesh, and no auxiliary tools are needed when disassembling the rectifier mesh, making it convenient to disassemble and clean the rectifier mesh. The range hood adopts the above-mentioned smoke collection hood structure, thereby facilitating the cleaning of the range hood.

Description

Technical Field

[0001] This utility model relates to the field of kitchen utensils technology, and in particular to a smoke collection hood structure and a range hood. Background Technology

[0002] A range hood is a kitchen appliance that purifies the kitchen environment. Installed above the kitchen stove, it can quickly remove the waste from the stove and the harmful fumes produced during cooking and exhaust them outdoors. At the same time, it condenses and collects the fumes, reducing pollution, purifying the air, and providing safety features such as protection against poisoning and explosions.

[0003] Existing range hoods generally use centrifugal compressors as their main power source. The centrifugal compressor draws the fumes into the fume collection hood, and under the centrifugal force of the rotating impeller, the fumes are discharged to the external flue through a check valve. As a result, when the fumes enter the fume collection hood, the airflow is relatively chaotic, and the collision of airflows generates significant eddy noise. To address this issue, existing technologies incorporate a rectifier screen inside the fume collection hood to rectify the fumes and reduce noise. However, the rectifier screen requires regular cleaning to reduce grease buildup and ensure proper airflow.

[0004] However, the rectifier mesh is usually fastened to the smoke hood with fixing bolts. Due to the small space inside the smoke hood, it is difficult to disassemble and clean the rectifier mesh, which makes it difficult to clean the range hood. Utility Model Content

[0005] The technical problem solved by this utility model is to provide a smoke collection hood structure that can effectively solve the problem of difficult disassembly and cleaning of the rectifier screen;

[0006] The second technical problem solved by this utility model is to provide a range hood that can effectively solve the problem of difficult cleaning of range hoods.

[0007] The first technical problem mentioned above is solved by the following technical solution:

[0008] A smoke hood structure, comprising:

[0009] The cover includes a smoke collection chamber enclosed by a back plate, an opening and closing plate, and side plates. The two side plates are disposed opposite to the back plate, and the opening and closing plate is opposite to the back plate and movably connected to the side plates.

[0010] Rectifier network,

[0011] The cover has a smoke collection chamber with openings at the top and bottom. The front of the cover is provided with an opening and closing plate for forming the smoke collection chamber. The opening and closing plate has an open state and a closed state that can be switched between each other.

[0012] A rectifier mesh is located inside the smoke collection chamber. The rectifier mesh is inserted into or snapped onto the cover. In the retracted state, the opening and closing plate abuts against the rectifier mesh to fix the rectifier mesh and the cover. In the unfolded state, the opening and closing plate disengages from the rectifier mesh.

[0013] The smoke collection hood structure described in this utility model has the following advantages compared with the prior art:

[0014] The rectifier mesh is plugged into or snapped onto the cover, and the mesh is pressed against the cover by the retractable hinge plate, thus firmly fixing the rectifier mesh to the cover. This reduces vibration and noise caused by insecure installation during use. When disassembly is required, simply unfold the hinge plate, which detaches from the rectifier mesh, allowing the mesh to be removed from the cover. Since no bolts or other locking devices are needed to fix the rectifier mesh, and no auxiliary tools are required to disassemble it, the rectifier mesh is easy to remove and clean.

[0015] In some embodiments, the cover includes a back plate, and the rectifier mesh is inserted into the back plate; the back plate is provided with a socket, and the socket is provided with a slot, and the rectifier mesh can be inserted into the slot in a direction close to the back plate;

[0016] Alternatively, the back plate may be provided with a plug block, and the rectifier wire may be provided with a socket, which can be plugged into the plug block.

[0017] In some embodiments, two sockets are provided, and the two sockets are spaced apart along the left and right direction of the back plate. The slots on the two sockets face each other, and the slots pass through the end of the socket away from the back plate.

[0018] Alternatively, one socket may be provided, and the slot of the socket may be located on the side of the socket facing the hinge plate.

[0019] In some embodiments, when the socket is disposed on the back panel, the height of the end of the slot near the back panel is lower than the height of the end of the slot away from the back panel.

[0020] In some embodiments, the socket includes a first plate, a second plate, and a third plate, wherein the first plate and the second plate are connected to opposite ends of the third plate, the first plate and the second plate are disposed opposite to each other, and the first plate, the second plate, and the third plate form the slot.

[0021] In some embodiments, the cover is provided with an abutment surface located inside the smoke collection chamber, and the opening and closing plate is provided with an abutment top on the side facing the back plate. In the closed state, the abutment top and the abutment surface clamp and fix the rectifier mesh.

[0022] In some embodiments, the top abutment includes a support main board, with a fixing plate and a top plate at both ends of the support main board. The fixing plate is connected to the opening and closing plate, and the top plate abuts against the rectifier mesh. The support main board has a first flow hole.

[0023] In some embodiments, the cover further includes two side plates, which are disposed opposite to each other on both sides of the back plate in the left-right direction; a lamp panel is connected between the two side plates, the opening and closing plate is located below the lamp panel, and the abutting surface is disposed on the lower end surface of the lamp panel.

[0024] In some embodiments, the edges of the rectifier mesh are provided with flanges.

[0025] The second technical problem mentioned above is solved by the following technical solution:

[0026] A range hood includes a blower box and a smoke collection hood structure as described above. The blower box is disposed on the hood body and has a fan chamber that communicates with the smoke collection chamber.

[0027] Compared with the prior art, the range hood described in this utility model has the following advantages: it can be easily cleaned through a rectifier screen that is easy to disassemble and assemble. Attached Figure Description

[0028] Figure 1 This is a side sectional view of the opening and closing plate in the retracted state of this utility model;

[0029] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0030] Figure 3 for Figure 1 Enlarged view at point B in the middle;

[0031] Figure 4 This is a side sectional view of the opening and closing plate in the unfolded state and the rectifier mesh being removed in this utility model;

[0032] Figure 5 This is a structural diagram of the present invention without the hinge plate;

[0033] Figure 6 yes Figure 5 Enlarged view of point C in the middle;

[0034] Figure 7 This is a schematic diagram of the socket in this utility model;

[0035] Figure 8 This is a structural diagram of the hinged plate in the unfolded state in this utility model from another direction;

[0036] Figure 9 This is a schematic diagram of the top of the device in this utility model;

[0037] Figure 10 This is a schematic diagram of the damping swivel frame in this utility model;

[0038] Figure 11 This is a schematic diagram of the rectifier grid in this utility model.

[0039] Label Explanation:

[0040] 1. Cover; 11. Back panel; 12. Opening / closing panel; 13. Side panel; 131. Vertical panel; 132. Horizontal panel; 14. Light panel; 141. Abutting surface; 15. Front panel; 16. Guide plate;

[0041] 2. Rectifier mesh; 21. Flanged edge;

[0042] 3. Socket; 31. Slot; 32. Connecting edge; 33. Fixing hole; 34. First plate; 35. Second plate; 36. Third plate;

[0043] 4. Top; 41. Supporting main board; 42. Fixing plate; 43. Top plate; 44. First flow hole;

[0044] 5. Damping rotating frame; 51. Fixed frame; 52. Rotating frame; 53. Damping shaft; 54. Second flow passage;

[0045] 6. Fixed base; 61. Base plate; 62. Fixed block; 63. Ball bearing;

[0046] 7. Fixing pin; 71. Plug; 72. Insert rod;

[0047] 8. Bellows. Detailed Implementation

[0048] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0049] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0050] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0051] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0052] Figures 1 to 11 As shown, this application provides a smoke collection hood structure. The hood body 1 forms a smoke collection cavity with openings at the top and bottom (the top and bottom direction is the X direction in Figure 5). The front part of the hood body 1 is provided with an opening and closing plate 12 for constituting the smoke collection cavity. The opening and closing plate 12 has an open state and a closed state that can be switched between each other. The rectifier mesh 2 is located in the smoke collection cavity. The rectifier mesh 2 is inserted into or snapped onto the hood body 1. In the closed state, the opening and closing plate 12 abuts against the rectifier mesh 2 so as to fix the rectifier mesh 2 and the hood body 1. In the open state, the opening and closing plate 12 is disengaged from the rectifier mesh 2.

[0053] The rectifier mesh 2 is plugged or snapped onto the cover 1, and the rectifier mesh 2 is pressed and fixed onto the cover by the folding opening plate 12, thus firmly fixing the rectifier mesh 2 onto the cover. This can reduce the vibration and noise caused by the rectifier mesh being not securely installed during use. When disassembly is required, simply unfold the opening plate 12, and the opening plate 12 will detach from the rectifier mesh 2, that is, the rectifier mesh will detach from the support. Then the rectifier mesh 2 can be detached from the cover 1, and thus the rectifier mesh can be removed. Since no bolts or other locking parts are needed when fixing the rectifier mesh 2, and no auxiliary tools are needed when disassembling the rectifier mesh, it is convenient to disassemble and clean the rectifier mesh 2.

[0054] like Figure 1As shown, the cover 1 includes a back plate 11, an opening and closing plate 12, and two side plates 13. The two side plates 13 are arranged opposite each other at both ends of the back plate 11 in the left-right direction (the left-right direction is the Y direction in Figure 5). The opening and closing plate 12 is opposite to the back plate 11 and is movably connected to the side plates 13. The back plate 11, the opening and closing plate 12, and the two side plates 13 enclose at least part of the smoke collection chamber. The rectifier mesh 2 is located inside the smoke collection chamber. Specifically, one end of the rectifier mesh 2 is inserted into or snapped onto the back plate 11 and / or the side plates 13. It can be understood that one end of the rectifier mesh 2 can be inserted into the back plate 11 or the side plates 13; it can be snapped onto the back plate 11 or the side plates 13.

[0055] like Figure 1 , Figures 5 to 7 As shown, in some embodiments, one end of the rectifier mesh 2 is inserted into the back plate 11, and the opening and closing plate 12 abuts and fixes the other end of the rectifier mesh 2 to the cover 1. This fixing method can also minimize the area occupied by the rectifier mesh 2, thereby allowing airflow to pass smoothly. A socket 3 is provided on the back plate 11, and a slot 31 is provided on the socket 3. The rectifier mesh 2 can be inserted into the slot 31 in the direction close to the back plate 11, so that the rectifier mesh 2 can be pulled out from the slot 31 after the opening and closing plate 12 is disengaged. Using the above-mentioned slot 31 can stabilize the rectifier mesh 2 during the opening and closing of the opening and closing plate 12, preventing the rectifier mesh 2 from falling off during the opening and closing of the opening and closing plate 12. For example, as... Figures 5 to 7 As shown, in some embodiments, two sockets 3 are provided, and the two sockets 3 are spaced apart on the back plate 11 in the left-right direction. The slots 31 are provided on the side where the two sockets 3 face each other, so that the openings of the two slots 31 are opposite each other; and the end of the slot 31 away from the back plate 11 passes through the socket 3 so that the rectifier mesh 2 can be inserted into the slot 31. In the current embodiment, the socket 3 includes a first plate 34, a second plate 35 and a third plate 36, wherein the first plate 34 and the second plate 35 are connected to the opposite ends of the third plate 36. The first plate 34 and the second plate 35 are arranged opposite each other so that the first plate 34, the second plate 35 and the third plate 36 form a slot 31. The end of the first plate 34 and the second plate 35 in the same direction is provided with a bent connecting edge 32. The connecting edge 32 is provided with a fixing hole 33. The back plate 11 is provided with a connecting hole opposite to the fixing hole 33. The locking member passes through the fixing hole 33 and is connected to the connecting hole. The connecting hole can be a screw hole and the locking member can be a bolt or a screw. In an alternative embodiment, the two sockets 3 may also be disposed on two opposite side plates 13; when disposed on the side plates 13, the sockets 3 are disposed on the side plates 13 near the back plate 11. Alternatively, the aforementioned sockets 3 may be disposed on both the side plates 13 and the back plate 11.

[0056] In some alternative embodiments, a single socket 3 can be provided, which can also be located on the back plate 11. A slot 31 is located on the socket 3, with the slot opening facing the side of the hinge plate 12, so that the slot 31 can be directly inserted into the slot 31. In the current embodiment, the socket 3 can still adopt a groove-shaped structure formed by directly bending sheet metal parts; the specific connection will not be described in detail.

[0057] like Figure 1 As shown, in some embodiments, when the socket 3 is disposed on the back plate 11, the height of the end of the slot 31 near the back plate 11 is lower than the height of the end of the pull groove away from the back plate 11, so that the slot 31 is in an inclined state from low to high. Therefore, when the rectifier mesh 2 is installed, the rectifier mesh 2 is in an inclined state, so that when the rectifier mesh 2 is inserted into the slot 31, it can slide into the slot 31 and be fixed by its own gravity, thereby facilitating the installation of the rectifier mesh 2.

[0058] In some alternative embodiments, the back plate 11 is provided with snap-fit ​​pins, for example, snap-fit ​​pins having a pin post and a pin head. The pin post is connected to the back plate 11, and the pin head is connected to the pin post. The size of the pin head is larger than the size of the pin post, at least allowing the pin head to deform. One end of the rectifier mesh 2 is provided with a snap-fit ​​hole, and the rectifier mesh 2 is snapped into the snap-fit ​​hole by the snap-fit ​​pin. It is understood that other forms of snap-fit ​​blocks can also be provided on the back plate to snap one end of the rectifier mesh 2 into the back plate 11. In some alternative embodiments, the back plate 11 can also be provided with insert blocks, and the rectifier mesh 2 is provided with insert holes, so that the insert holes of the rectifier mesh 2 are inserted into the insert blocks for fixation.

[0059] like Figure 5 and Figure 6As shown, in some embodiments, the cover 1 is provided with an abutment surface 141 located in the smoke collection chamber, and the opening and closing plate 12 abuts against the rectifier mesh on the abutment surface 141 to fix the rectifier mesh 2 and the cover 1. Specifically, the side panel 13 includes a vertical plate 131 and a horizontal plate 132. The horizontal plate 132 is connected to the vertical plate 131, and the horizontal plate 132 and the vertical plate 131 are set at an angle, making the entire side panel 13 in an inverted L-shape. The vertical plate 131 is connected to the back plate 11. The cover 1 also has a lamp panel 14, which is disposed between the two horizontal plates 132. The first end of the lamp panel 14 extends between the two opposing vertical plates 131, and there is a gap between the first end of the lamp panel 14 and the back plate 11 to allow airflow. The abutment surface 141 is disposed on the lower end face of the first end of the lamp panel 14, so that the rectifier mesh 2 abuts against the abutment surface 141 of the lamp panel 14, covering the gap between the first end of the lamp panel 14 and the back plate 11. The abutment surface 141 is disposed on the lamp panel 14 for easy molding, and also saves materials, as there is no need to separately set up a component to place the abutment surface 141. In some alternative embodiments, an abutment plate may be provided on the side plate 13, thereby placing the abutment surface 141 on the abutment plate. In the current embodiment, the horizontal plate 132 and the vertical plate 131 are integrally formed. In addition, a front plate 15 is connected to the second end of the lamp panel 14. The front plate 15 is disposed opposite to the back plate 11, and the front plate 15 is sandwiched between the two oppositely disposed horizontal plates 132, thereby forming a complete smoke collection chamber. Exemplarily, the front plate 15 and the lamp panel 14 can be integrally formed. The opening and closing plate 12 is disposed below the lamp panel 14, so that when the opening and closing plate 12 is closed, it can clamp and fix the rectifier mesh 2 with the abutment surface 141 on the lamp panel 14. In the current embodiment, the angle of the lamp panel 14 is the same as the tilt angle of the slot 31, thereby ensuring the stability of the rectifier mesh 2 when it abuts against the abutment surface 141.

[0060] It should be noted that in some embodiments, in order to reduce the size of the rectifier mesh 2 and to allow the airflow from the lower opening of the smoke collection chamber to quickly converge to the rectifier mesh 2 and then flow out through the upper opening of the smoke collection chamber, guide plates 16 are provided on the two opposite side plates 13. The first end of the guide plate 16 is connected to the vertical plate 131, and the second end of the guide plate 16 extends upward at an angle toward the opposite side plate 13 of the side plate 13 to which it is fixed. The second end of the guide plate 16 may be connected, but is not limited to, to the back plate 11 and / or the lamp panel 14, thereby achieving stable fixation.

[0061] like Figure 1 , Figure 8 as well as Figure 9As shown, to facilitate the fixing of the rectifier mesh 2, in some embodiments, a top abutment 4 is provided on the side of the opening and closing plate 12 facing the back plate 11. The top abutment 4 clamps and fixes the rectifier mesh 2 with the abutment surface 141. For better fixation, two top abutments 4 are provided, spaced apart along the interval direction of the opposite side plates 13, thereby supporting and fixing both ends of the rectifier mesh 2. Exemplarily, the top abutment 4 includes a main support plate 41, with a fixing plate 42 and a top plate 43 provided at both ends of the main support plate 41. The fixing plate 42 is set at an angle to the main support plate 41. The fixing plate 42 is connected to the opening and closing plate 12, and the top plate 43 abuts against the rectifier mesh 2. Thus, the fixing area is increased by the fixing plate 42, and the supporting area is increased by the top plate 43, making the entire top abutment 4 more stable in terms of fixing and support. In the current embodiment, the fixing plate 42 may be, but is not limited to, adhesively attached to the opening and closing plate 12.

[0062] Based on the fact that rectifier network 2 has a mesh structure, such as Figure 11 As shown, the rectifier mesh 2 has a flange 21 at its edge, which strengthens the overall structural strength of the rectifier mesh 2. When inserted into the slot 31, the flange 21 of the rectifier mesh 2 is inserted into the slot 31, thereby minimizing the obstruction of the mesh openings and reducing airflow obstruction. When supported by the top plate 4, the top plate 43 of the top plate 4 abuts against the flange 21 of the rectifier mesh 2 on the contact surface 141, which also minimizes the obstruction of the mesh openings and reduces airflow obstruction. Furthermore, in this embodiment, to further reduce the obstruction of airflow by the top plate 4, a first flow passage hole 44 is provided on the main support plate 41 of the top plate 4, which also reduces airflow obstruction. In this embodiment, the center of the rectifier mesh 2 is recessed away from the lower opening of the smoke collection chamber, forming a convex mesh structure, which increases the flow cross-sectional area and minimizes wind resistance. The mesh openings of the rectifier mesh 2 are not specifically limited and can be circular or polygonal.

[0063] In some embodiments, the opening / closing plate 12 is transferred to the side plate 13, thereby enabling the opening / closing plate 12 to be opened and closed by rotation, facilitating operation. Further, a damping rotating frame 5 is provided on the side plate 13, and the opening / closing plate 12 is connected to the damping rotating frame 5, thereby achieving damping transfer through the damping rotating frame 5, reducing vibration and impact of the opening / closing plate 12 during opening and closing, and increasing the number of dwell positions of the opening / closing plate 12, improving applicability. Exemplarily, two damping rotating frames 5 are provided, spaced apart along the interval direction of opposite side plates 13. Exemplarily, the damping rotating frame 5 includes a fixed frame 51 and a rotating frame 52. The fixed frame 51 is fixed to the side plate 13, and one end of the fixed frame 51 and the rotating frame 52 are connected by a damping shaft 53, thereby allowing the rotating frame 52 to rotate relative to the fixed frame 51. The other end of the rotating frame 52 is connected to the opening / closing plate 12. For example, in order to reduce obstruction of airflow, the rotating frame 52 is provided with a second flow hole 54 to facilitate flow.

[0064] like Figure 1 and Figure 2 As shown, in order to ensure the stability of the opening and closing plate 12 in the closed state, in some embodiments, a fixing seat 6 is also provided on the side plate 13, and a fixing pin 7 is provided on the opening and closing plate 12. The fixing pin 7 can be inserted and removed from the fixing seat 6, so that the opening and closing plate 12 is inserted into the fixing seat 6 in the closed state, thereby ensuring its stability in the closed state. Specifically, the fixing base 6 includes a base plate 61, on which two spaced-apart fixing blocks 62 are provided. Each fixing block 62 has a receiving groove, with the openings of the receiving grooves on the two fixing blocks 62 facing each other. An elastic element is provided at the bottom of the receiving groove, and a ball bearing 63 is connected to the elastic element. The fixing pin 7 includes a rod 72 and a plug 71. The plug 71 is located at one end of the rod 72, and the other end of the rod 72 is connected to the opening / closing plate 12. The outer diameter of the plug 71 is larger than the outer diameter of the rod 72, thus forming a limiting step at the connection between the plug 71 and the rod 72. This allows the plug 71 to be inserted between the two opposing ball bearings 63, thereby limiting the ball bearings 63 to the limiting step and stabilizing the opening / closing plate 12. When disengagement is required, simply pull the opening / closing plate 12. For example, the elastic element can be, but is not limited to, a compression spring.

[0065] like Figure 1As shown, this application also provides a range hood, which includes a fan box and the aforementioned smoke collection hood structure. The fan box 8 is provided with a fan cavity, and a centrifugal fan is disposed in the fan cavity. The fan box is disposed at the upper end of the hood body 1. The fan cavity is connected to the upper opening of the smoke collection cavity, so that the airflow entering from the lower opening of the smoke collection cavity can be rectified by the rectifier mesh 2 and then enter the fan cavity through the upper opening, and be discharged by the fan, thereby achieving the rectification effect. When cleaning is required after long-term use, simply unfold the opening and closing plate 12 so that the opening and closing plate 12 is disengaged from the rectifier mesh 2, and the rectifier mesh 2 can be removed, thus eliminating the need to fix the rectifier mesh 2 with screws or bolts, making disassembly and cleaning convenient. After cleaning, simply insert the rectifier mesh 2 directly into the slot 31 and close the opening and closing plate 12 so that the opening and closing plate 12 abuts against the rectifier mesh 2 at the contact surface 141, thereby facilitating the cleaning of the range hood.

[0066] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0067] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A fume hood structure, characterized by, include: Cover (1), the cover (1) forms a smoke collection chamber with openings at the top and bottom, and the front part of the cover (1) is provided with an opening and closing plate (12) for constituting the smoke collection chamber, the opening and closing plate (12) has an open state and a closed state that can be switched between each other. A rectifier mesh (2) is located inside the smoke collection chamber. The rectifier mesh (2) is inserted into or snapped onto the cover (1). In the retracted state, the opening and closing plate (12) abuts against the rectifier mesh to fix the rectifier mesh (2) and the cover (1). In the unfolded state, the opening and closing plate (12) disengages from the rectifier mesh (2).

2. The fume hood structure of claim 1, wherein, The cover (1) includes a back plate (11), and the rectifier mesh (2) is inserted into the back plate (11); A socket (3) is provided on the back plate (11), and a slot (31) is provided on the socket (3). The rectifier mesh (2) can be inserted into the slot (31) in a direction close to the back plate (11). Alternatively, the back plate (11) is provided with a plug, and the rectifier mesh (2) is provided with a socket, which can be plugged into the plug.

3. The fume hood structure of claim 2, wherein, Two sockets (3) are provided, and the two sockets (3) are spaced apart along the left and right direction of the back plate (11). The slots (31) on the two sockets (3) are opposite each other, and the slots (31) pass through the end of the socket (3) away from the back plate (11). Alternatively, one socket (3) may be provided, and the slot (31) may have its opening located on the side of the socket (3) facing the hinge plate (12).

4. The fume hood structure of claim 2, wherein, When the socket (3) is disposed on the back plate (11), the height of the end of the slot (31) near the back plate (11) is lower than the height of the end of the slot (31) away from the back plate (11).

5. The fume hood structure of claim 2, wherein, The socket (3) includes a first plate (34), a second plate (35) and a third plate (36). The first plate (34) and the second plate (35) are connected to opposite ends of the third plate (36). The first plate (34) and the second plate (35) are arranged opposite to each other. The first plate (34), the second plate (35) and the third plate (36) form the slot (31).

6. The fume hood structure of claim 2, wherein, The cover (1) is provided with an abutment surface (141) located in the smoke collection chamber. The opening and closing plate (12) is provided with a top abutment (4) on the side facing the back plate (11). In the closed state, the top abutment (4) and the abutment surface (141) clamp and fix the rectifier net (2).

7. The fume hood structure of claim 6, wherein, The top (4) includes a support main board (41), and the two ends of the support main board (41) are provided with a fixing plate (42) and a top plate (43). The fixing plate (42) is connected to the opening and closing plate (12), and the top plate (43) abuts against the rectifier mesh (2). The support main board (41) has a first flow hole (44).

8. The fume hood structure of claim 6, wherein, The cover (1) also includes two side plates (13), which are arranged opposite each other on the left and right sides of the back plate (11). A lamp panel (14) is connected between the two side plates (13). The opening and closing plate (12) is located below the lamp panel (14), and the abutting surface (141) is located on the lower end surface of the lamp panel (14).

9. The fume hood structure according to any one of claims 1-8, wherein, The rectifier mesh (2) has a flange (21) at its edge.

10. A range hood characterized by, The range hood includes a blower box (8) and a smoke collection hood structure as described in any one of claims 1-9, wherein the blower box (8) is disposed on the hood body (1) and the blower box (8) is connected to the smoke collection chamber.

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