Smoke extraction structure and range hood

Abstract

This application relates to a smoke extraction structure and a range hood. The smoke extraction structure includes an exhaust pipe, a valve frame, a first movable member, a second movable member, and a switch assembly. The exhaust pipe has an exhaust channel, a first through hole, and a second through hole. The first and second through holes are spaced apart on the pipe wall of the exhaust pipe and communicate with the exhaust channel. The valve frame is connected to the exhaust pipe and has a mounting cavity that communicates with the first and second through holes. The first movable member is movably disposed in the first through hole. The second movable member is movably disposed in the second through hole. The second movable member has a closed valve state and a closed valve state. The switch assembly is movably disposed in the mounting cavity, and the first and second movable members are rotatably connected to the switch assembly. The cooperation of the first movable member, the second movable member, and the switch assembly in this application allows for long-term stable operation and high reliability.

Description

Technical Field

[0001] This application relates to the field of range hoods, and more particularly to a smoke extraction structure and a range hood. Background Technology

[0002] In related technologies, the check valve of a range hood relies on two valve plates rotating around a pivot. It opens under fan pressure and closes under gravity and spring force. This design has drawbacks: the valve plates may not seal tightly, or after a period of use, the different adhesion forces of grease to the two valve plates can cause the pressure on one valve plate to balance, preventing the other from opening. This increases the range hood's exhaust resistance and affects its smoke extraction efficiency. When the range hood fan is turned off, the adhesion of grease can prevent the valve plates from closing effectively. These issues lead to backflow and smoke leakage problems with the check valve. Summary of the Invention

[0003] This application provides a smoke exhaust structure and a range hood subject three, to address improving the reliability of the smoke exhaust structure when opening and closing.

[0004] On the one hand, this application provides a smoke exhaust structure, including:

[0005] An air outlet duct has an air outlet channel, a first through hole, and a second through hole. The first through hole and the second through hole are spaced apart on the duct wall and communicate with the air outlet channel.

[0006] A valve frame body, connected to the air outlet pipe, has a mounting cavity, which is connected to the first through hole and the second through hole;

[0007] The first movable component is movably disposed in the first through hole;

[0008] The second movable member is movably disposed in the second through hole; the second movable member has a closed valve state and an open valve state; when the second movable member is in the closed valve state, the second movable member is inserted into the air outlet channel to close the air outlet channel; when the second movable member is in the open valve state, the second movable member moves to exit the air outlet channel to open the air outlet channel.

[0009] A switch assembly, wherein the switch assembly is movably disposed within the mounting cavity, and the first movable member and the second movable member are respectively rotatably connected to the switch assembly;

[0010] When air enters through the air outlet duct, the first movable component moves away from the air outlet channel under the action of wind pressure, and drives the second movable component to move out of the air outlet channel through the switch assembly;

[0011] After the air outlet pipe stops receiving air, the switch assembly drives the first movable component to move toward the air outlet channel, and drives the second movable component to move to the valve-off state.

[0012] Furthermore, the switching assembly includes:

[0013] A swing arm, one end of which is rotatably connected to the cavity wall of the mounting cavity; the other end is provided with a hinge seat;

[0014] The first link, one end of which is rotatably connected to the first movable member, and the other end of which is rotatably connected to the hinge seat;

[0015] The second link has one end rotatably connected to the second movable member and the other end rotatably connected to the hinge seat;

[0016] When the first movable component moves away from the air outlet channel, it drives the swing arm to rotate clockwise via the first connecting rod. When the swing arm rotates clockwise, it drives the second connecting rod, thereby causing the first movable component to exit the air outlet channel.

[0017] When the air intake in the air outlet duct stops, the swing arm reverses to drive the first movable part to move toward the air outlet duct via the first connecting rod, and drives the second movable part to move to the valve-off state via the second connecting rod.

[0018] Furthermore, it also includes an elastic slide rod assembly, which is rotatably disposed within the mounting cavity and is rotatably connected to the hinge seat;

[0019] When the second movable component is in the closed valve state, the first connecting rod and the elastic slide rod assembly are set at an angle, and the opening direction is away from the second movable component;

[0020] When the second movable component is in the open valve state, the first connecting rod and the second elastic slide rod assembly are set at an angle, and the opening direction faces the second movable component.

[0021] Furthermore, the resilient slide assembly includes:

[0022] The first sliding seat is movably connected to the cavity wall of the mounting cavity;

[0023] The second sliding seat is movably inserted into the first sliding seat, and the second sliding seat is rotatably connected to the hinge seat;

[0024] A spring is disposed inside the first sliding seat, with one end of the spring connected to the first sliding seat and the other end connected to the second sliding seat.

[0025] Furthermore, it also includes a pusher, which is movably disposed in the mounting cavity;

[0026] When the second movable member is in the open valve state, the hinge seat abuts against the push member under the force of the elastic slide rod assembly;

[0027] When the air intake in the air outlet duct stops, the pusher pushes the hinge seat to reverse the swing arm.

[0028] Furthermore, the pusher pushes the hinge seat until the length direction of the first connecting rod is collinear with the length direction of the elastic slide rod assembly.

[0029] Furthermore, the pusher is a solenoid valve;

[0030] Upon receiving a shutdown signal, the solenoid valve is energized to move in the direction of the mounting cavity, thereby pushing the hinge seat.

[0031] Furthermore, the first through hole is provided with a first limiting structure and a second limiting structure; the first movable member is movably disposed between the first limiting structure and the second limiting structure.

[0032] Furthermore, the axial direction of the first through hole is set at an angle to the axial direction of the second through hole.

[0033] On the other hand, this application also provides a range hood, including:

[0034] Range hood;

[0035] As described above, the exhaust duct of the exhaust structure is connected and communicates with the range hood.

[0036] The technical solutions provided in this application have the following advantages compared with the prior art:

[0037] In this application's technical solution, the valve frame provides a mounting base for the switch assembly. When air enters the outlet duct, wind pressure is generated. The first movable part is pushed under the action of wind pressure, moving along the first through hole away from the outlet duct. Then, the switch assembly drives the second movable part to move, exiting the outlet duct along the second through hole. At this time, the entire outlet duct opens, allowing for smooth smoke exhaust. When air enters the outlet duct, the switch assembly reverses its action, moving the first movable part along the first through hole towards the outlet duct. The second movable part is then driven by the switch assembly to insert into the outlet duct along the second through hole, sealing the outlet duct and achieving the purpose of closing the outlet duct. This application achieves the opening and closing of the outlet duct through the cooperation of the first movable part, the second movable part, and the switch assembly. The switch assembly is located within the mounting cavity, which is isolated from the outlet duct by the first and second movable parts. Therefore, the influence of oil fumes on the switch assembly can be reduced. Thus, the cooperation of the first movable part, the second movable part, and the switch assembly in this application can ensure long-term stable operation and high reliability. Attached Figure Description

[0038] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0041] Figure 1 This is a schematic diagram of a smoke exhaust structure in a closed valve state, provided in an embodiment of this application.

[0042] Figure 2 This is a schematic diagram of a smoke exhaust structure in the open valve state, provided in an embodiment of this application.

[0043] Figure 3 This is a schematic diagram illustrating the intermediate process of the valve transitioning from the open state to the closed state.

[0044] Figure 4 for Figure 1 Schematic diagram of the structure of the medium elastic slide bar assembly;

[0045] Figure 5 for Figure 4 Schematic diagram of the cross section at point AA;

[0046] Figure 6 for Figure 4 Perspective view;

[0047] Figure 7 This is a schematic diagram of the elastic slide bar assembly in a compressed state.

[0048] Figure 8 for Figure 7 Perspective view.

[0049] Explanation of reference numerals in the attached figures:

[0050] 100. Smoke exhaust structure;

[0051] 1. Air outlet duct; 1a. Air outlet channel; 1b. First through hole; 1c. Second through hole; 11. First limiting structure; 12. Second limiting structure;

[0052] 2. Valve frame body; 2a. Mounting cavity;

[0053] 3. First active component;

[0054] 4. Second active component;

[0055] 5. Switch assembly; 51. Rocker arm; 52. Hinge seat; 53. First connecting rod; 54. Second connecting rod; 55. Elastic slide rod assembly; 551. First sliding seat; 551a. Sliding cavity; 551b. Clearance groove; 552. Second sliding seat; 553. Spring; 554. Connecting block; 56. Push member;

[0056] 200. Range hood. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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, 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.

[0058] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0059] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0060] This application provides a smoke exhaust structure 100 that can be applied to a range hood. The smoke exhaust structure 100 is connected to the range hood 200 of the range hood. The range hood also includes a fan. The exhaust pipe 1 of the smoke exhaust structure 100 is connected to the outlet of the range hood 200. When the range hood is turned on, the fan starts, driving air to flow to the exhaust pipe 1 and being discharged through the exhaust pipe 1.

[0061] Figures 1 to 8 An exhaust structure 100 provided in this application embodiment includes an exhaust pipe 1, a valve frame 2, a first movable member 3, a second movable member 4, and a switch assembly 5. The exhaust pipe 1 has an exhaust channel 1a, a first through hole 1b, and a second through hole 1c. The first through hole 1b and the second through hole 1c are spaced apart in the pipe wall of the exhaust pipe 1 and communicate with the exhaust channel 1a. The valve frame 2 is connected to the exhaust pipe 1 and has a mounting cavity 2a, which communicates with the first through hole 1b and the second through hole 1c. The first movable member 3 is movably disposed in the first through hole 1b. The second movable member 4 is movably disposed in the second through hole 1c.

[0062] The second movable component 4 has a closed valve state and an open valve state; such as Figure 1As shown, when the second movable part 4 is in the closed valve state, the second movable part 4 is inserted into the air outlet channel 1a to close the air outlet channel 1a; as Figure 2 As shown, when the second movable part 4 is in the open valve state, the second movable part 4 moves to exit the air outlet channel 1a to open the air outlet channel 1a.

[0063] The switch assembly 5 is movably disposed within the mounting cavity 2a, and the first movable member 3 and the second movable member 4 are respectively rotatably connected to the switch assembly 5;

[0064] When air enters the air outlet duct 1, the first movable part 3 moves away from the air outlet channel 1a under the action of wind pressure, and drives the second movable part 4 to move out of the air outlet channel 1a through the switch assembly 5.

[0065] After the air outlet duct 1 stops receiving air, the switch assembly 5 drives the first movable part 3 to move toward the air outlet channel 1a, and drives the second movable part 4 to move to the valve-off state.

[0066] Understandably, the valve frame 2 provides the mounting base for the switch assembly 5. When the fan starts, air enters the outlet pipe 1. At this time, the second movable part 4 is in the closed valve state. The air inflow will increase the air pressure in the outlet channel 1a. The first movable part 3 is pushed under the action of air pressure. The first movable part 3 moves away from the outlet channel 1a along the first through hole 1b. Then, the switch assembly 5 drives the second movable part 4 to move. The second movable part 4 is driven to exit the outlet channel 1a along the second through hole 1c. At this time, the entire outlet pipe 1 is open, and smoke can be discharged smoothly. When the fan stops, the air in the outlet pipe 1 stops. At this time, the switch assembly 5 reverses its action and drives the first movable part 3 to move towards the outlet channel 1a along the first through hole 1b. The second movable part 4 is driven by the switch assembly 5 to insert into the outlet channel 1a along the second through hole 1c and block the outlet channel 1a, thus achieving the purpose of closing the outlet channel 1a. The switch assembly 5 can be electrically or communicatively connected to the control system of the range hood. After receiving a shutdown signal, the switch assembly 5 can perform a reverse action. A specific embodiment can be found below, describing the action of the solenoid valve after receiving a shutdown signal.

[0067] This application achieves the opening and closing of the air outlet duct 1a through the cooperation of the first movable member 3, the second movable member 4, and the switch assembly 5. The switch assembly 5 is located in the mounting cavity 2a, which is isolated from the air outlet duct 1a by the first movable member 3 and the second movable member 4. Therefore, the influence of oil fumes on the switch assembly 5 can be reduced. Thus, the cooperation of the first movable member 3, the second movable member 4, and the switch assembly 5 in this application can operate stably for a long time with high reliability.

[0068] like Figure 1 , Figure 2 and Figure 3As shown, in the technical solution of this embodiment, the switch assembly 5 includes a rocker arm 51, a first connecting rod 53, and a second connecting rod 54. One end of the rocker arm 51 is rotatably connected to the cavity wall of the mounting cavity 2a; the other end is provided with a hinge seat 52. One end of the first connecting rod 53 is rotatably connected to the first movable member 3, and the other end is rotatably connected to the hinge seat 52. One end of the second connecting rod 54 is rotatably connected to the second movable member 4, and the other end is rotatably connected to the hinge seat 52. When the first movable member 3 moves in a direction away from the air outlet channel 1a, it drives the rocker arm 51 to rotate clockwise through the first connecting rod 53. When the rocker arm 51 rotates clockwise, it drives the second connecting rod 54, thereby driving the first movable member 3 to exit the air outlet channel 1a.

[0069] When the air intake in the air outlet duct 1 stops, the swing rod 51 reverses to drive the first movable part 3 to move toward the air outlet channel 1a via the first connecting rod 53, and drives the second movable part 4 to move to the valve-closed state via the second connecting rod 54.

[0070] It is understandable that the hinge seat 52 can be used to hinge the rocker arm 51, the first link 53, and the second link 54, thus enabling the three to work together.

[0071] The first movable component 3 is pushed by wind pressure to move away from the air outlet duct 1a, that is, towards the mounting cavity 2a. The first movable component 3 exerts a force on the hinge seat 52 through the first connecting rod 53. The movement of the hinge seat 52 is restricted by the swing rod 51, and it can only rotate around the rotational connection between the swing rod 51 and the cavity wall of the mounting cavity 2a as the rotation center. Figure 1 As shown, at this time, under the push of the first link 53, the hinge seat 52 drives the second link 54, which in turn drives the second movable part 4 to move in the direction of exiting the air outlet channel 1a.

[0072] Similarly, when the swing arm 51 reverses, it restricts the rotation position of the hinge seat 52. When the hinge seat 52 moves along the arc-shaped line, it pushes the first movable member 3 toward the air outlet channel 1a through the first connecting rod 53, and pushes the second movable member 4 to block the air outlet channel 1a through the second connecting rod 54.

[0073] like Figures 1 to 8 As shown, the technical solution of this embodiment also includes an elastic slide rod assembly 55, which is rotatably disposed in the mounting cavity 2a and rotatably connected to the hinge seat 52. When the second movable member 4 is in the closed state, the first connecting rod 53 and the elastic slide rod assembly are set at an angle, and the opening direction is away from the second movable member 4. When the second movable member 4 is in the open state, the first connecting rod 53 and the second elastic slide rod assembly are set at an angle, and the opening direction is facing the second movable member 4.

[0074] Understandably, the elastic slide bar assembly 55 can provide stable support and elastic cushioning, such as Figure 1 As shown, the design of the elastic slide rod assembly 55 ensures that the hinge seat 52 is in a balanced state when the valve is closed, which can reduce the problem of backdraft and smoke leakage, without increasing the cost too much.

[0075] like Figure 2 As shown, in the open valve state, the elastic force of the elastic slide rod assembly 55 can ensure that the junction seat is stably abutted against the pusher, improving reliability and reducing backdraft and smoke leakage problems, without increasing the cost too much.

[0076] like Figures 4 to 8 As shown, in the technical solution of this embodiment, the elastic slide rod assembly 55 includes a first sliding seat 551, a second sliding seat 552, and a spring 553. The first sliding seat 551 is movably connected to the cavity wall of the mounting cavity 2a; the second sliding seat 552 is movably inserted into the first sliding seat 551 and is rotatably connected to the hinge seat 52; the spring 553 is disposed in the first sliding seat 551, and one end of the spring 553 is connected to the first sliding seat 551, and the other end is connected to the second sliding seat 552.

[0077] In this embodiment, the first sliding seat 551 is provided with a sliding cavity 551a, and the spring 553 is provided in the sliding cavity 551a. The second sliding seat 552 is provided in the second sliding seat 552, and the first sliding seat 551 and the second sliding seat 552 are connected by the spring 553. In this way, the first sliding seat 551 can slide along the second sliding seat 552, and the length of the elastic slide rod assembly 55 can be adjusted to adapt to the movement of the hinge seat 52, thus avoiding interference.

[0078] In this embodiment, the first sliding seat 551 is provided with a relief groove 551b, and the second sliding seat 552 is provided with a connecting block 554 at one end away from the spring 553. The second sliding seat 552 is rotatably connected to the hinge seat 52 through the connecting block 554.

[0079] The design of the clearance groove 551b provides movable position space for the connecting block 554, thus allowing for a wider range of adjustable lengths for the flexible slide block assembly.

[0080] like Figures 1 to 3 As shown, the technical solution of this embodiment also includes a pusher 56, which is movably disposed in the mounting cavity 2a; when the second movable member 4 is in the open valve state, the hinge seat 52 abuts against the pusher under the action of the elastic slide rod assembly 55; when the air intake stops in the air outlet pipe, the pusher 56 pushes the hinge seat 52 to make the swing rod 51 reverse.

[0081] It is understandable that the pusher pushes the hinge seat 52 in the opposite direction, causing the swing arm 51 to reverse, and driving the first movable part 3 and the second movable part 4 to move, so that the first movable part 3 and the second movable part 4 return to their initial positions. The initial position of the second movable part 4 is the position where the air outlet channel 1a is closed.

[0082] like Figure 3 As shown, in the technical solution of this embodiment, the pusher 56 pushes the hinge seat 52 to the first connecting rod 53 in a direction that is collinear with the length direction of the elastic slide rod assembly 55.

[0083] Understandably, after the pusher 56 pushes the hinge seat 52 to the point where the length direction of the first connecting rod 53 is collinear with the length direction of the elastic slide rod assembly 55, the pusher can stop its action and return to its initial position. Under the action of inertia and the elastic force of the elastic slide rod assembly 55, the hinge seat 52 will continue to move and drive the second movable member 4 to move to close the air outlet channel 1a.

[0084] In the technical solution of this embodiment, the pusher 56 is a solenoid valve; after receiving the stop signal, the solenoid valve is energized so that it moves toward the mounting cavity 2a to push the hinge seat 52.

[0085] It is understandable that by designing the pusher 56 as a solenoid valve, the operation of the pusher 56 can be controlled, enabling the automatic switching assembly 5 to automatically start and reverse, thereby resetting the first movable part 3 and the second movable part 4 to their initial state.

[0086] like Figure 1 As shown, in the technical solution of this embodiment, a first limiting structure 11 and a second limiting structure 12 are provided in the first through hole 1b; the first movable member 3 is movably disposed between the first limiting structure 11 and the second limiting structure 12.

[0087] It is understandable that the first limiting structure 11 and the second limiting structure 12 limit the movement position of the first movable member 3.

[0088] like Figures 1 to 3 As shown, in this embodiment, the axial direction of the first through hole 1b is set at an angle to the axial direction of the second through hole 1c. In this embodiment, the axis of the first through hole 1b is perpendicular to the axis of the second through hole 1c, that is, the moving direction of the first movable member 3 is perpendicular to the moving direction of the second movable member 4. This allows the air outlet duct 1 to be used and facilitates the design of the position of the switch assembly 5.

[0089] On the other hand, such as Figures 1 to 3As shown, this application also provides a range hood, including a range hood 200 and a smoke exhaust structure 100 as described above. The specific structure of the smoke exhaust structure 100 is as described in the above embodiments. Since this range hood adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described in detail here. The exhaust pipe 1 of the smoke exhaust structure 100 is connected and communicates with the range hood 200.

[0090] In this embodiment, after the range hood fan is turned on, the second movable part 4 closes the air outlet pipe, and the pressure generated by the fan pushes the first movable part 3 to move to the right. Due to the interconnection between the first connecting rod 53, the second connecting rod 54, and the swing rod 51, the second movable part 4 is pushed downward. At the same time, the first sliding seat 551 and the second sliding seat 552 slide relative to each other, compressing the spring 553. When the first connecting rod 53 and the first sliding seat 551 are in a straight line, the movement inflection point is reached. At this time, the distance between the first sliding seat 551 and the second sliding seat 552 is the shortest, and the spring 553 is compressed to its minimum. Under the action of pressure, the first movable part 3 continues to move to the right. After that, the spring 553 begins to extend. The pressure generated by the fan and the spring force together push the first movable part 3 to move to the right, and the second movable part 4 moves downward. When the first movable part 3 moves to the second limiting structure 12, the movement stops due to the obstruction of the second limiting structure. The movement is then controlled by the elastic sliding rod assembly 55. At this time, the second movable part 4 is in the open valve state, the air outlet duct 1a is opened, and the range hood starts to work.

[0091] When the range hood fan stops, the solenoid valve 56 moves upward, pushing the hinge seat 52 upward and compressing the spring 553. When the hinge seat 52 moves to the point where the first connecting rod 53 and the first sliding seat 551 are in a straight line, it reaches the inflection point of movement, and the spring 553 reaches its maximum compression point. Afterward, the solenoid valve 56 continues to move upward, the spring begins to extend, and the spring force drives the mechanism to move, the first movable member 3 moves to the left, and the second movable member 4 moves upward. When the first movable member 3 reaches the first limiting structure 11, it stops moving due to the resistance of the first limiting structure 11, and the second movable member 4 reaches the valve-closed state, closing the air outlet channel 1a.

[0092] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0093] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0094] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A smoke exhaust structure (100), characterized in that, include: The air outlet pipe (1) has an air outlet channel (1a), a first through hole (1b) and a second through hole (1c). The first through hole (1b) and the second through hole (1c) are opened at intervals on the pipe wall of the air outlet pipe (1) and communicate with the air outlet channel (1a). The valve frame (2) is connected to the air outlet pipe (1) and has a mounting cavity (2a), which is connected to the first through hole (1b) and the second through hole (1c). The first movable component (3) is movably disposed in the first through hole (1b); The second movable member (4) is movably disposed in the second through hole (1c); the second movable member (4) has a closed valve state and an open valve state; when the second movable member (4) is in the closed valve state, the second movable member (4) is inserted into the air outlet channel (1a) to close the air outlet channel (1a); when the second movable member (4) is in the open valve state, the second movable member (4) moves to exit the air outlet channel (1a) to open the air outlet channel (1a). A switch assembly (5) is movably disposed within the mounting cavity (2a), and the first movable member (3) and the second movable member (4) are respectively rotatably connected to the switch assembly (5); When the air outlet pipe (1) is inlet, the first movable part (3) moves away from the air outlet channel (1a) under the action of wind pressure, and drives the second movable part (4) to move out of the air outlet channel (1a) through the switch assembly (5). After the air outlet pipe (1) stops receiving air, the switch assembly (5) drives the first movable part (3) to move toward the air outlet channel (1a), and drives the second movable part (4) to move to the valve-off state. The switching assembly (5) includes: A swing rod (51) is provided at one end, which is rotatably connected to the cavity wall of the mounting cavity (2a); and a hinge seat (52) is provided at the other end. The first connecting rod (53) has one end rotatably connected to the first movable part (3) and the other end rotatably connected to the hinge seat (52); The second link (54) has one end rotatably connected to the second movable part (4) and the other end rotatably connected to the hinge seat (52); When the first movable part (3) moves away from the air outlet channel (1a), it drives the swing rod (51) to rotate in the forward direction through the first connecting rod (53). When the swing rod (51) rotates in the forward direction, it drives the second connecting rod (54), thereby driving the first movable part (3) to exit the air outlet channel (1a). When the air intake in the air outlet pipe (1) stops, the swing rod (51) reverses so that the first movable part (3) moves toward the air outlet channel (1a) via the first connecting rod (53), and the second movable part (4) moves to the valve-off state via the second connecting rod (54).

2. The smoke exhaust structure (100) according to claim 1, characterized in that, It also includes an elastic slide rod assembly (55), which is rotatably disposed in the mounting cavity (2a) and is rotatably connected to the hinge seat (52); When the second movable part (4) is in the closed state, the first connecting rod (53) and the elastic slide rod assembly (55) are set at an angle, and the opening direction is away from the second movable part (4). When the second movable part (4) is in the open valve state, the first connecting rod (53) and the elastic slide rod assembly (55) are set at an angle, and the opening direction faces the second movable part (4).

3. The smoke exhaust structure (100) according to claim 2, characterized in that, The elastic slide assembly (55) includes: The first sliding seat (551) is movably connected to the cavity wall of the mounting cavity (2a); The second sliding seat (552) is movably inserted into the first sliding seat (551), and the second sliding seat (552) is rotatably connected to the hinge seat (52); A spring (553) is disposed inside the first sliding seat (551), and one end of the spring (553) is connected to the first sliding seat (551), and the other end is connected to the second sliding seat (552).

4. The smoke exhaust structure (100) according to claim 2, characterized in that, It also includes a pusher (56), which is movably disposed in the mounting cavity (2a); When the second movable member (4) is in the open valve state, the hinge seat (52) abuts against the push member (56) under the force of the elastic slide rod assembly (55). When the air intake stops in the air outlet pipe (1), the pusher (56) pushes the hinge seat (52) to reverse the swing arm (51).

5. The smoke exhaust structure (100) according to claim 4, characterized in that, The pusher (56) pushes the hinge seat (52) to the length direction of the first connecting rod (53) being collinear with the length direction of the elastic slide rod assembly (55).

6. The smoke exhaust structure (100) according to claim 4, characterized in that, The pusher (56) is a solenoid valve; Upon receiving a shutdown signal, the solenoid valve is energized to move in the direction of the mounting cavity (2a) to push the hinge seat (52).

7. The smoke exhaust structure (100) according to claim 1, characterized in that, The first through hole (1b) is provided with a first limiting structure (11) and a second limiting structure (12); the first movable member (3) is movably disposed between the first limiting structure (11) and the second limiting structure (12).

8. The smoke exhaust structure (100) according to claim 1, characterized in that, The axial direction of the first through hole (1b) is set at an angle to the axial direction of the second through hole (1c).

9. A range hood, characterized in that, include: Range hood (200); The exhaust structure (100) as described in any one of claims 1 to 8, wherein the exhaust pipe (1) of the exhaust structure (100) is connected and communicates with the range hood (200).

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