Box structure for range hood and range hood

Abstract

The box structure for the range hood and the range hood are characterized in that the box structure comprises a fan box body, the interior of the fan box body is hollow, a containing cavity with an opening in the bottom and the front side is formed, a fan system for the range hood is arranged in the containing cavity, and a smoke outlet used for being communicated with an air outlet of the fan system is formed in the top wall of the containing cavity; the left side edge and the right side edge of the opening in the front side of the containing cavity are folded backwards and extend towards the interior of the containing cavity to form folded edges. The back face of the cover plate is attached to the front sides of the two folded edges so that the front side opening can be closed. The first blocking piece is arranged on the back face of the cover plate and is adjacent to or attached to the rear sides of the two folded edges so as to prevent the cover plate from being forwards separated from the folded edges. The second blocking piece is arranged on the back face of the cover plate and above the first blocking piece, is supported on the top wall of the containing cavity and is detachably connected with the top wall of the containing cavity; meanwhile, the first blocking piece can move under the action of the actuating piece so as to relieve constraint on the two folded edges. The device is convenient to disassemble and assemble, and the structural stability can be guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of kitchen appliances, and in particular relates to a box structure for a range hood and a range hood. Background Art

[0002] In order to facilitate the inspection and maintenance of the fan system, the existing cabinet structure for range hoods generally includes a fan box body in which the fan system is arranged, and a cover plate arranged on the front opening of the fan box body. The cover plate is generally fixed by exposed screws, that is, the user at the front side of the range hood can see the screws, which affects the refinement of the whole machine.

[0003] In order to improve the sophistication, the cover is fixed by hooks, buckles, etc., such as the Chinese utility model patent "Easy to Repair Range Hood" (authorization announcement number CN215523441U) with application number CN202121433488.9, which includes a smoke hood, a wind cabinet arranged on the smoke hood, and a fan arranged in the wind cabinet; the wind cabinet includes a main body connected to the smoke hood, a top plate arranged on the upper part of the main body, and a baffle arranged on the front of the main body. The front of the wind cabinet is provided with an opening portion opposite to the fan and used for fan maintenance, and the baffle covers the front of the opening; the rear surface of the baffle is provided with a connecting frame, which is detachably arranged on the front of the main body through a plug-in structure, and the upper part of the connecting frame is detachably arranged on the top plate through fasteners. The fan can be repaired after the baffle is removed.

[0004] The above-mentioned plug-in structure includes an insertion piece located at the outer edge of the connecting frame and extending backward, and an insertion slot arranged at the front of the wind cabinet and opposite to the insertion piece and located at the side of the opening, and the insertion piece is arranged in the insertion slot. When the plug-in structure is used to fix the cover plate, the following technical problems exist:

[0005] 1. The positive pressure provided by the plug-in structure is insufficient, resulting in the instability of the overall structure, poor sealing performance of the box, and oil leakage at the gaps.

[0006] 2. When installing the cover, the insertion piece needs to be aligned with the insertion slot before being inserted; when removing the cover, if the insertion piece and the insertion slot are inserted tightly, it will be difficult to remove the cover, making the disassembly and assembly of the cover inconvenient. Summary of the invention

[0007] The first technical problem to be solved by the present invention is to provide a cabinet structure for a range hood that is easy to disassemble and assemble and can ensure structural stability, in view of the current status of the prior art.

[0008] The second technical problem to be solved by the present invention is to provide a box structure for a range hood to improve the sealing performance of the box.

[0009] The third technical problem to be solved by the present invention is to provide a range hood having the above-mentioned box structure.

[0010] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: a box structure for a range hood, comprising:

[0011] The fan box body is hollow inside to form a cavity with a bottom and a front opening, in which a fan system for the range hood is arranged, a smoke exhaust port for communicating with an air outlet of the fan system is arranged on the top wall of the cavity, and the left and right side edges of the front opening of the cavity are folded backwards and extend toward the interior of the cavity to form a folded edge;

[0012] A cover plate, the back of which is attached to the front sides of the two folded edges to close the front opening;

[0013] It is characterized by also including:

[0014] A first stopper is provided on the back of the cover plate and is adjacent to or attached to the rear sides of the two folded edges to prevent the cover plate from moving forward away from the folded edges;

[0015] The second stopper is arranged on the back side of the cover plate and above the first stopper, and is supported on the top wall of the cavity and connected to the top wall of the cavity in a detachable manner;

[0016] At the same time, the first stopper can move under the action of the actuating member to release the constraints on the two folded edges.

[0017] In this way, when the cover plate needs to be removed and the front opening is opened, the connection between the second stopper and the bottom wall of the cavity can be released first, and then the first stopper can be moved by the actuator to release the constraint on the two folded edges, so that the cover plate can be separated from the fan box body, which is convenient for operation. At the same time, the cooperation between the first stopper and the two folded edges, the cooperation between the second stopper and the top wall of the cavity, and the cooperation between the back of the cover plate and the two folded edges in the present invention make the overall structure of the assembled box structure more stable; and after assembly, the first stopper and the second stopper are both located on the back of the cover plate, which are invisible to the naked eye for users at the front side of the range hood.

[0018] Preferably, there are two first stoppers, one on the left and one on the right, and are respectively adjacent to or attached to the rear sides of their corresponding folded edges; and the two first stoppers can be relatively close to each other under the action of the actuator to release the constraints on their corresponding folded edges.

[0019] Preferably, the two first stoppers are arranged on the back side of the cover plate in a manner that they can move in the left-right direction;

[0020] The actuator is arranged so that when the second stopper on the cover plate is supported on the top wall of the cavity, the actuator drives the two first stops to move away from each other and be adjacent to or attached to the rear sides of their respective corresponding folded edges; when the cover plate moves upward and the second stopper on the cover plate is separated from the top wall of the cavity, the actuator drives the two first stops to move relatively close to each other and releases the restraining effect on the two folded edges.

[0021] The actuator of the present invention can adopt an existing driving mechanism such as an electric push rod. In order to simplify the structure and reduce the cost, it can also be further facilitated for disassembly and assembly. Preferably, the actuator includes:

[0022] A movable member is disposed on the back of the cover plate and between the two first stoppers in a manner that it can move up and down;

[0023] a transmission member, connecting the movable member and the two first stoppers, so as to convert the upward and downward moving force of the movable member into moving the two first stoppers left and right, and when the movable member moves upward to the first position, the two first stoppers move away from each other under the action of the transmission member, and when the movable member moves downward to the second position, the two first stoppers move relatively close to each other under the action of the transmission member;

[0024] an elastic member, acting on the movable member or the transmission member, so that the movable member always has a tendency to move downward to the second position;

[0025] At the same time, the front opening of the cavity has a lower edge, and the lower edge is arranged to be supported under the movable member when the cover plate moves downward to drive the movable member to overcome the elastic force of the elastic member and move upward to the first position.

[0026] In this way, the actuator of the present invention can automatically adjust the position of the first stopper according to the position of the cover plate in the up-down direction. That is, when the cover plate is installed in place and the second stopper on the back of the cover plate is supported on the top wall of the cavity, the actuator automatically drives the two first stoppers to move away from each other and be adjacent to or attached to the rear side of the corresponding folded edges; after the cover plate moves upward, the actuator automatically drives the two first stoppers to move relatively close to each other and release the restraining effect on the two folded edges, so that the cover plate can be quickly disassembled and assembled.

[0027] Preferably, the transmission member is rod-shaped, a first end of which is rotatably connected to the corresponding first stopper with a rotation axis extending forward and backward, and a second end of which is rotatably connected to the movable member with a rotation axis extending forward and backward.

[0028] Preferably, the elastic member is a vertically arranged spring, the upper end of the spring is constrained to the second end of the transmission member, and the lower end of the spring is fixed relative to the cover plate.

[0029] Due to the special use environment of the range hood, oil stains are usually attached to the inside of the box structure. When the cover is removed, the oil stains attached to the back of the cover will slide down along the cover, thereby dirtying the kitchen countertop and the floor. Therefore, in order to solve the problem of oil stains dripping when the cover is removed, preferably, the movable part is in the shape of a vertical plate, and the front side of the vertical plate is attached to the back of the cover;

[0030] At the same time, an oil receiving strip extending left and right is also provided at the lower edge of the vertical plate, the oil receiving strip is attached to the back of the cover plate, and an oil leakage hole penetrating from top to bottom is provided on the oil receiving strip;

[0031] It also includes a plug which can be movably arranged on the oil leakage hole. When the movable part moves to the first position, the plug opens the oil leakage hole. When the movable part moves to the second position, the plug closes the oil leakage hole.

[0032] In this way, the oil collecting strip can collect oil, and when the cover is assembled on the open front side of the fan box body, the oil leakage hole on the oil collecting strip opens, so that the oil can flow downward through the oil leakage hole and be collected in the oil cup of the range hood; conversely, when the cover is separated from the fan box body, the oil leakage hole is closed by the plug, and the oil is collected on the oil collecting strip and will not flow down, thereby preventing oil from dripping onto the kitchen countertop and the floor when the cover is removed.

[0033] Furthermore, the plug is connected to the second end of the transmission member, so that it can move with the transmission member, so that the position of the plug can be controlled by utilizing the movement of the transmission member, without the need to set up other power mechanisms.

[0034] Furthermore, two ends of the fried dough stick receiving portion are relatively close to the left and right sides of the cover plate respectively.

[0035] In the above schemes, preferably, the second stopper is connected to the top wall of the cavity by a fastener, and the fastener passes downward through the vertical through-hole on the second stopper and is connected to the top wall of the cavity, and presses the second stopper against the top wall of the cavity.

[0036] Preferably, the fastener is a screw, and a threaded hole is provided on the top wall of the cavity at a position corresponding to the connecting hole.

[0037] In order to further solve the second technical problem mentioned above, preferably, the left and right sides of the cover plate are extended backward to form flanges, and the two flanges are wrapped around the left and right sides of the fan box body.

[0038] Preferably, the first stopper is a plate-shaped body extending vertically, and the front side surface of the first stopper is used to fit to the rear side of the folded edge. The plate-shaped first stopper can improve the sealing performance of the box structure.

[0039] Further preferably, the folded edge located on the left side of the front opening of the cavity is inclined forward from left to right, and the folded edge located on the right side of the front opening of the cavity is inclined forward from right to left;

[0040] The first part of the front side plate surface of each first stopper is attached to the back side of the cover plate in a manner that it can move left and right along the back side of the cover plate, and the second part is an inclined surface consistent with the inclination direction of the corresponding folded edge.

[0041] In this way, the first stopper can be easily moved to a position close to the rear side of the folded edge.

[0042] The technical solution adopted by the present invention to solve the third technical problem is: a range hood, characterized by having the range hood box structure as described above.

[0043] Compared with the prior art, the advantages of the present invention are: by setting the first stopper and the second stopper on the back of the cover plate, when the cover plate needs to be removed and the front opening is opened, the connection between the second stopper and the bottom wall of the cavity can be released first, and then the first stopper can be moved by the actuator to release the constraint on the two folded edges, so that the cover plate can be separated from the fan box body, which is convenient for operation. At the same time, the cooperation between the first stopper and the two folded edges, the cooperation between the second stopper and the top wall of the cavity, and the cooperation between the back of the cover plate and the two folded edges in the present invention make the overall structure of the assembled box structure more stable; and after assembly, the first stopper and the second stopper are both located on the back of the cover plate, which are invisible to the naked eye for users at the front side of the range hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention when the cover plate is removed;

[0045] Figure 2 It is a schematic diagram of the structure of the embodiment of the present invention from another viewing angle when the cover plate is removed;

[0046] Figure 3 It is a structural schematic diagram of the embodiment of the present invention from another viewing angle when the cover plate is removed;

[0047] Figure 4 for Figure 1 Sectional view along AA direction;

[0048] Figure 5 for Figure 1 Cross-sectional view along the BB direction;

[0049] Figure 6 for Figure 1 3D exploded view of the structure;

[0050] Figure 7 for Figure 1 Schematic diagram of the structure of the middle cover;

[0051] Figure 8 This is a schematic diagram of the structure of an embodiment of the present invention when the cover plate is assembled in place;

[0052] Fig. 9 It is a structural schematic diagram of the embodiment of the present invention from another perspective when the cover plate is assembled in place;

[0053] Fig.10 It is a structural schematic diagram of the embodiment of the present invention from another perspective when the cover plate is assembled in place;

[0054] Fig.11 for Figure 8 Sectional view along CC direction;

[0055] Fig.12 for Figure 8 Cross-sectional view along the DD direction;

[0056] Fig.13 for Figure 8 Schematic diagram of the structure of the middle cover. DETAILED DESCRIPTION

[0057] The present invention is further described in detail below with reference to the accompanying drawings.

[0058] like Figures 1 to 13 As shown, a preferred embodiment of the cabinet structure for a range hood and the range hood of the present invention is shown. The range hood includes a fume collecting hood, a cabinet structure and a fan system 2.

[0059] The smoke collecting hood is of prior art (not shown in the figure), and its interior is hollow to form a smoke collecting cavity with a smoke inlet and a smoke outlet, and the smoke outlet is located at the top of the smoke collecting cavity.

[0060] The box structure is arranged on the smoke collecting hood, and comprises a fan box body 1, a cover plate 3, a first stopper 4, a second stopper 5, an actuating member 6, and a plug 7.

[0061] The interior of the fan box body 1 is hollow to form a cavity 10 with an open bottom and front side, and the bottom opening of the cavity 10 is opposite to and connected to the smoke outlet on the smoke hood. A smoke outlet 110 is provided on the top wall 11 of the cavity 10. The left and right side edges of the front opening of the cavity 10 are folded back and extend toward the inside of the cavity 10 to form a folded edge 12.

[0062] The back of the cover plate 3 is attached to the front side of the two folded edges 12 to close the front opening of the cavity 10. The left and right sides of the cover plate 3 are extended backward to form flanges 31, and the two flanges 31 are wrapped around the left and right sides of the fan box body 1. Under the action of external force, the cover plate 3 can move up and down relative to the fan box body 1.

[0063] There are two first stoppers 4, one on the left and one on the right, arranged on the back of the cover plate 3 and respectively attached to the rear side of the corresponding folded edge 12 to prevent the cover plate 3 from moving forward from the folded edge 12. The two first stoppers 4 can move in the left and right directions under the action of the actuator 6 and relatively approach each other to release the constraints on the corresponding folded edge 12. Specifically, each first stopper 4 is a plate-like body extending vertically, and the front side of the plate-like body is used to attach to the rear side of the corresponding folded edge 12. In order to allow the first stopper 4 to be attached to the rear side of the corresponding folded edge 12 after being moved left and right, the folded edge located on the left side of the front opening of the cavity 10 is tilted forward from left to right, and the folded edge located on the right side of the front opening of the cavity 10 is tilted forward from right to left. The first part 41 of the front side panel of each first stopper 4 is attached to the back side of the cover plate 3 in a manner that it can move left and right along the back side of the cover plate 3, and the second part 42 is an inclined surface consistent with the inclination direction of the corresponding folded edge 12 (that is, the second part 42 is spaced opposite to the back side of the cover plate 3 so that the corresponding folded edge 12 can be inserted when the first stopper moves), and the first part 41 and the second part 42 are connected by a step. For details, please refer to Figure 4 , 7 , 11, 13. In this embodiment, the cooperation between the first stopper 4, the cover plate and the folded edge can improve the stability and sealing of the overall structure.

[0064] The second stopper 5 is arranged on the back of the cover plate 3 and above the first stopper 4, and is supported on the top wall 11 of the cavity 10 and connected to the top wall 11 of the cavity 10 in a detachable manner to prevent the cover plate 3 from moving downward. Specifically, the second stopper 5 is a stopper extending left and right, and is connected to the top wall 11 of the cavity 10 by screws. The screws pass downward through the vertically penetrating connection holes 51 on the second stopper 5 and are then threadedly connected to the threaded holes 111 on the top wall 11 of the cavity 10, and the second stopper 5 is pressed against the top wall 11 of the cavity 10. When the cover plate needs to be removed, the screws can be screwed out.

[0065] In this embodiment, the actuator 6 is arranged so that when the second stopper 5 on the cover plate 3 is supported on the top wall 11 of the cavity 10, the actuator 6 drives the two first stops 4 to move away from each other and be adjacent to or attached to the rear side of their respective corresponding folded edges 12; when the cover plate 3 moves upward and the second stopper 5 on the cover plate 3 is separated from the top wall 11 of the cavity 10, the actuator 6 drives the two first stops 4 to move relatively close to each other and releases the restraining effect on the two folded edges 12.

[0066] Specifically, the actuating member 6 includes a movable member 61 , a transmission member 62 , and an elastic member 63 .

[0067] The movable member 61 is in the shape of a vertical plate, the front side of which is attached to the back of the cover plate 3, and is arranged between the two first stoppers 4 in a manner that it can move up and down. At the same time, a left-right extending oil receiving strip 611 is also provided at the lower edge of the vertical plate (the left and right ends of the oil receiving strip 611 are respectively relatively close to the left and right sides of the cover plate 3), and the oil receiving strip 611 is attached to the back of the cover plate 3, and an oil receiving groove with an opening facing upward is formed between the oil receiving strip 611 and the back of the cover plate 3. Two oil leakage holes 612 that penetrate up and down are provided on the oil receiving strip 611 at intervals in the left-right direction to allow the oil in the oil receiving groove to pass through.

[0068] The transmission member 62 connects the movable member 61 and the two first stoppers 4 to convert the up-and-down moving force of the movable member 61 into moving the two first stoppers 4 left and right, and when the movable member 61 moves upward to the first position, the two first stoppers 4 move away from each other under the action of the transmission member 62, and when the movable member 61 moves downward to the second position, the two first stoppers 4 move relatively close to each other under the action of the transmission member 62. Specifically, there are at least two transmission members 62, each of which is in the shape of a rod, and the first end of each transmission member is rotatably connected to the corresponding first stopper 4 with the rotation axis extending forward and backward, and the second end is rotatably connected to the movable member 61 with the rotation axis extending forward and backward. In this embodiment, two transmission members 62 arranged one on the left and one on the right are grouped as one, and there are three groups, which are arranged at intervals in the up-and-down direction.

[0069] The elastic member 63 is a vertically arranged spring, the upper end of the spring is constrained on the second end of the transmission member 62, and the lower end of the spring is fixed relative to the cover plate 3, so that the movable member 61 always has a tendency to move downward to the second position.

[0070] At the same time, the front opening of the cavity 10 has a lower edge 13 extending left and right, and the lower edge 13 is arranged to be supported under the movable member 61 when the cover plate 3 moves downward, thereby driving the movable member 61 to overcome the elastic force of the elastic member 63 and move upward to the first position.

[0071] There are two plugs 7, which are connected to the second ends of the transmission member 62 at the bottom, so that they can move with the transmission member 62. Specifically, the second end of the transmission member 62 extends away from the first end to form an extension section, and the plug 7 is located at the end of the extension section. When the movable member 61 moves to the first position, the plug 7 opens the oil leakage hole 612. For details, please refer to Figures 10 to 13 When the movable member 61 moves to the second position, the plug 7 closes the oil leakage hole 612. For details, please refer to Figure 3 , 4 , 5, 7.

[0072] In this way, the actuator 6 of this embodiment can automatically adjust the position of the first stopper 4 according to the position of the cover plate 3 in the up and down direction. When the cover plate 3 needs to be installed, the cover plate 3 is placed on the front side of the fan box body 1, and then the cover plate 3 is moved downward. At this time, the movable member 61 on the back of the cover plate 3 overcomes the elastic force of the elastic member 63 and moves upward to the first position under the action of the lower edge 13 of the cavity 10. During the upward movement of the movable member 61, the two first stops are driven away from each other in the left and right directions by the transmission member 62 and are attached to the rear side of the corresponding folding edge, until the cover plate 3 is installed downward in place, and the second stopper 4 on the back of the cover plate 3 is supported on the top wall 11 of the cavity, and the second stopper 4 and the top wall 11 of the cavity are connected by screws. At the same time, during the upward movement of the movable member, the transmission member 62 can move with the plug 7 to open the oil leakage hole 612. At this time, the oil in the box structure can enter the smoke hood through the oil leakage hole 612, and then be collected in the oil cup below the smoke hood.

[0073] When the cover plate 3 needs to be removed, first unscrew the screws between the second stopper 4 and the top wall 11 of the cavity, and then move the cover plate 3 upward. At this time, the movable member 61 on the back of the cover plate 3 moves downward to the second position under the action of the elastic member 63, and during the downward movement of the movable member 61, the two first stoppers are driven by the transmission member 62 to move in the left and right directions and approach each other, thereby releasing the restraining effect on the two folded edges, and the cover plate 3 can be moved forward to remove the cover plate 3. During the downward movement of the movable member 61, the transmission member 62 can move with the plug 7 to close the oil leakage hole 612, so as to prevent the oil on the fried dough stick from dripping from the oil leakage hole 612.

[0074] The above-mentioned fan system 2 is an existing centrifugal fan, which is arranged in a box structure, and the air outlet of the fan system 2 corresponds to the smoke exhaust port 110 on the top wall of the cavity. The fan system is used to drive the oil smoke flow into the smoke hood from the smoke inlet and output it from the smoke exhaust port 110.

[0075] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0076] The term "vertical" is also used in the specification and claims of the present invention, which means basically along the up and down direction, and is not limited to the vertical direction only, and can also be slightly inclined relative to the vertical direction.

Claims

1. A box structure for a range hood, comprising: The fan box body (1) is hollow inside to form a cavity (10) with a bottom and a front open, in which a fan system (2) for the range hood is arranged. A smoke exhaust port (110) for communicating with the air outlet of the fan system (2) is provided on the top wall (11) of the cavity (10), and the left and right side edges of the front opening of the cavity (10) are folded backwards and extend toward the interior of the cavity (10) to form a folded edge (12); A cover plate (3), the back side of which is attached to the front sides of the two folded edges (12) to close the front opening; It is characterized by also including: A first stopper (4) is disposed on the back side of the cover plate (3) and is adjacent to or attached to the rear sides of the two folded edges (12) to prevent the cover plate (3) from moving forward away from the folded edges (12); A second stopper (5) is disposed on the back side of the cover plate (3) and above the first stopper (4), and is supported on the top wall (11) of the cavity (10) and is connected to the top wall (11) of the cavity (10) in a detachable manner; At the same time, the first stopper (4) can move under the action of the actuating member (6) to release the constraints on the two folded edges (12).

2. The housing structure for a range hood according to claim 1, characterized in that: There are two first stoppers (4), one on the left and one on the right, and they are respectively adjacent to or attached to the rear sides of their corresponding folded edges (12); and under the action of the actuator (6), the two first stoppers (4) can be relatively close to each other to release the constraints on their corresponding folded edges (12).

3. The housing structure for a range hood according to claim 2, characterized in that: Two first stoppers (4) are arranged on the back side of the cover plate (3) in a manner that allows them to move in left-right directions; The actuating member (6) is arranged such that when the second stopper (5) on the cover plate (3) is supported on the top wall (11) of the cavity (10), the actuating member (6) drives the two first stoppers (4) to move away from each other and to be adjacent to or attached to the rear sides of the corresponding folded edges (12); when the cover plate (3) moves upward and the second stopper (5) on the cover plate (3) is separated from the top wall (11) of the cavity (10), the actuating member (6) drives the two first stoppers (4) to move relatively close to each other and release the restraining effect on the two folded edges (12).

4. The housing structure for a range hood according to claim 3, characterized in that: The actuating member (6) comprises: A movable member (61) is disposed on the back side of the cover plate (3) and between the two first stoppers (4) in a manner capable of moving up and down; A transmission member (62) connects the movable member (61) and the two first stop members (4) to convert the upward and downward moving force of the movable member (61) into causing the two first stop members (4) to move left and right, and when the movable member (61) moves upward to the first position, the two first stop members (4) move away from each other under the action of the transmission member (62), and when the movable member (61) moves downward to the second position, the two first stop members (4) move relatively close to each other under the action of the transmission member (62); an elastic member (63) acting on the movable member (61) or the transmission member (62) so that the movable member (61) always has a tendency to move downward to the second position; At the same time, the front opening of the cavity (10) has a lower edge (13), and the lower edge (13) is arranged to be supported under the movable member (61) when the cover plate (3) moves downward, thereby driving the movable member (61) to overcome the elastic force of the elastic member (63) and move upward to the first position.

5. The housing structure for a range hood according to claim 4, characterized in that: The transmission member (62) is rod-shaped, with a first end rotatably connected to the corresponding first stopper (4) and a rotation axis extending forward and backward, and a second end rotatably connected to the movable member (61) and a rotation axis extending forward and backward.

6. The housing structure for a range hood according to claim 5, characterized in that: The elastic member (63) is a spring arranged vertically, the upper end of the spring is constrained by the second end of the transmission member (62), and the lower end of the spring is fixed relative to the cover plate (3).

7. The housing structure for a range hood according to claim 5, characterized in that: The movable member (61) is in the shape of a vertical plate, and the front side of the vertical plate is attached to the back side of the cover plate (3); At the same time, an oil receiving strip (611) extending left and right is also provided at the lower edge of the vertical plate, the oil receiving strip (611) is attached to the back of the cover plate (3), and an oil leakage hole (612) penetrating from top to bottom is provided on the oil receiving strip (611); It also includes a plug (7) which is movably arranged on the oil leakage hole (612); when the movable part (61) moves to a first position, the plug (7) opens the oil leakage hole (612); when the movable part (61) moves to a second position, the plug (7) closes the oil leakage hole (612).

8. The housing structure for a range hood according to claim 7, characterized in that: The plug (7) is connected to the second end of the transmission member (62) so as to be movable along with the transmission member (62).

9. The housing structure for a range hood according to claim 7, characterized in that: The two ends of the oil-dough stick receiving portion (611) are respectively relatively close to the left and right sides of the cover plate (3).

10. The housing structure for a range hood according to any one of claims 1 to 9, characterized in that: The second stopper (5) is connected to the top wall (11) of the cavity (10) via a fastener, and the fastener passes downward through a vertically through-going connection hole (51) on the second stopper (5) and is connected to the top wall (11) of the cavity (10), thereby pressing the second stopper (5) against the top wall (11) of the cavity (10).

11. The housing structure for a range hood according to claim 10, characterized in that: The fastener is a screw, and a threaded hole (111) is provided on the top wall (11) of the cavity (10) at a position corresponding to the connection hole (51).

12. The housing structure for a range hood according to any one of claims 1 to 9, characterized in that: The left and right sides of the cover plate (3) both extend backwards to form flanges (31), and the two flanges (31) wrap around the left and right sides of the fan box body (1).

13. The housing structure for a range hood according to any one of claims 3 to 9, characterized in that: The first stopper (4) is a plate-shaped body extending vertically, and the front side plate surface of the first stopper (4) is used to fit to the rear side of the folded edge (12).

14. The housing structure for a range hood according to claim 13, characterized in that: The folded edge located on the left side of the front opening of the cavity (10) is inclined forward from left to right, and the folded edge located on the right side of the front opening of the cavity (10) is inclined forward from right to left; The first part (41) of the front side plate surface of each first stopper (4) is attached to the back side of the cover plate (3) in a manner that it can move left and right along the back side of the cover plate (3), and the second part (42) is an inclined surface that is consistent with the inclination direction of the corresponding folded edge (12).

15. A range hood, characterized in that A range hood box structure as claimed in any one of claims 1 to 14.

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