A smoke collection device and an integrated stove

Abstract

This utility model discloses a smoke collection device, including a smoke collection shell with a smoke inlet, a flap that closes the smoke inlet, and a drive structure assembly. The drive structure assembly drives the flap to move, causing it to rise and gradually expose the smoke inlet. An air duct is formed inside the flap, with an upper opening and a lower opening along the upper and lower edges of the flap, respectively. This utility model also discloses an integrated stove. The beneficial effect of this utility model is that it gives the flap additional functionality and achieves a dual-path collaborative capture mechanism for cooking fumes.

Description

Technical Field

[0001] This utility model relates to a smoke collection device and an integrated stove, belonging to the technical field of kitchen appliances. Background Technology

[0002] Integrated cooktops, as a core appliance in modern kitchens, typically employ a downdraft fan system to provide negative pressure, drawing in cooking fumes through a smoke collection device (upper-level unit) and directing them to the purification module. The smoke collection device features a smoke inlet with a movable flap (baffle) driven by a mechanism. This flap acts as a dynamic adjustment component, controlling the opening and closing of the smoke inlet. However, in current technology, the flap's function is limited to controlling the opening and closing of the smoke inlet, and it cannot fully participate in the fume extraction process under different cooking modes. Utility Model Content

[0003] The purpose of this invention is to provide a smoke collection device and an integrated stove, which gives the flap additional functions and realizes a dual-path collaborative capture mechanism for oil fumes.

[0004] This utility model is achieved through the following technical solution.

[0005] A smoke collection device includes a smoke collection shell with a smoke inlet, a flap that closes the smoke inlet, and a drive structure assembly. The drive structure assembly is used to drive the flap to move, causing it to rise and gradually expose the smoke inlet. An air duct is formed inside the flap, and the air duct forms an upper opening and a lower opening at the upper and lower edges of the flap, respectively.

[0006] As a further improvement of this utility model, the opening size of the lower through-hole is not smaller than the opening size of the upper through-hole.

[0007] As a further improvement of this utility model, the air duct includes an upper air duct and a lower air duct, the upper opening is located at the top of the upper air duct, and the lower opening is located at the bottom of the lower air duct; the width of the upper air duct is smaller than that of the lower air duct.

[0008] As a further improvement of this utility model, the flap includes a base plate and a panel connected to the front side of the base plate; the panel is used to close the smoke inlet, the base plate is connected to the drive structure assembly, and the air duct is formed in the base plate.

[0009] As a further improvement of this utility model, the front plate of the smoke collection shell includes a lower part of the front plate and an upper part of the front plate; the upper part of the front plate is inclined backward from its lower edge to its upper edge, and the smoke inlet is located on the upper part of the front plate; the lower part of the front plate is vertically arranged and forms a first guide surface to guide the oil fumes to flow to the smoke inlet.

[0010] As a further improvement of this utility model, a forward-extending smoke baffle is connected to the upper edge of the upper part of the front plate to block the rising oil fumes.

[0011] As a further improvement of this utility model, the upper edge of the smoke inlet and the upper edge of the front plate are spaced apart, so that the upper part of the front plate forms a second guide surface between its upper edge and the upper edge of the smoke inlet, so as to guide the oil fumes blocked by the smoke baffle to flow to the smoke inlet.

[0012] As a further improvement of this utility model, a sealing plate is provided inside the smoke collection housing, and the sealing plate and the flap define an enclosed space inside the smoke collection housing; the drive structure assembly includes at least one four-bar linkage assembly disposed inside the smoke collection housing and connected to the flap, and a drive mechanism that provides driving force to the flap, the four-bar linkage assembly being located within the enclosed space; the sealing plate is provided with a clearance groove that allows the linkage of the four-bar linkage assembly to extend.

[0013] As a further improvement of this utility model, a baffle plate is provided on the back of the flap, located below the clearance groove. As the flap gradually rises while the smoke inlet is closed, the baffle plate gradually approaches the sealing plate and closes the clearance groove.

[0014] An integrated stove, including the smoke collection device.

[0015] The beneficial effects of this utility model are:

[0016] In the second working state, the upper and lower inlets of the duct are connected. Some of the vertically rising fumes directly enter the smoke collection shell through the upper smoke inlet, while the other part of the fumes enters the duct through the upper inlet of the flap, is guided by the internal flow channel to the lower inlet, and is then sucked in through the lower smoke inlet. This forms a dual-path synergistic capture mechanism for fumes, making the flap itself part of the airflow path. Without adding an additional fan, the flap structure actively guides the upper fumes that might otherwise escape to the lower smoke inlet, expanding the effective smoke extraction range. When the resistance of the upper smoke inlet increases, the duct provides a second low-resistance path for the upper fumes through the lower smoke inlet, avoiding airflow congestion. At the same time, the continuous intake of fumes into the duct by the lower smoke inlet creates additional negative pressure at the upper inlet, which in turn enhances the suction of the upper smoke inlet, forming a complementary negative pressure effect between the upper and lower channels. This solves the problem of uneven suction caused by flow competition between the two channels. Attached Figure Description

[0017] The preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings to help understand the purpose and advantages of this utility model, wherein:

[0018] Figure 1 This is a schematic diagram of the smoke collection device;

[0019] Figure 2 This is a schematic diagram of the movement trajectory of the upper and lower edges of the flap;

[0020] Figure 3 This is a side view of the smoke collection device in its first working state.

[0021] Figure 4 This is a side view of the smoke collection device in its second operating state.

[0022] Figure 5 This is a side view of the smoke collection device in its third operating state.

[0023] Figure 6 This is a schematic diagram of a cooking scenario with the smoke collection device in its first, second, and third working states.

[0024] Figure 7 This is a schematic diagram of the flap structure;

[0025] Figure 8 This is a cross-sectional view of the flap.

[0026] Figure 9 This is a schematic diagram of a four-bar linkage and its drive mechanism in one embodiment.

[0027] Figure 10 This is a side view of a four-bar linkage structure with the first link being shorter than the second link.

[0028] Figure 11 This is a side view of a four-bar linkage structure with the length of the first link equal to that of the second link.

[0029] Figure 12 This is a schematic diagram of the structure connecting the synchronous rod in a four-bar linkage;

[0030] Figure 13 This is a schematic diagram of a four-bar linkage structure that is a split structure.

[0031] Figure 14 This is a schematic diagram of the internal structure of the smoke collection shell;

[0032] Figure 15 This is a schematic diagram showing the situation where the baffle plate does not completely close the clearance groove.

[0033] Figure 16 A schematic diagram of the baffle plate closing the clearance groove. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0035] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the construction shown in the accompanying drawings. The terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. These are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0036] Implementation Case 1:

[0037] A smoke collection device, used as a host computer in an integrated stove, is described below. Figures 1-16 It includes a smoke collection housing 1, a flap 2, at least one four-bar linkage assembly, and a drive mechanism. The front plate 12 of the smoke collection housing 1 is provided with a smoke inlet 11. The flap 2 corresponds to the smoke inlet 11 and closes the smoke inlet 11 when not in use. The four-bar linkage assembly is disposed inside the smoke collection housing 1 and connected to the flap 2. The drive mechanism is used to provide power to the flap 2.

[0038] The four-bar linkage is used to guide the movement of the flap 2 when the drive mechanism provides power. The movement trajectory of the flap 2 is divided into synchronous lifting movement and rotation. The rotation of the flap 2 first starts from its upper edge along the direction away from the front plate 12 of the smoke collection housing 1, and then rotates from its upper edge along the direction closer to the front plate 12 of the smoke collection housing 1. The upper movement trajectory c1 and the lower movement trajectory c2 of the flap 2 are as follows: Figure 2 As shown. It should be noted that the lifting and movement of the flap 2 refers to the gradual increase in the horizontal position of the flap 2, rather than a vertical upward movement; the rotation of the flap 2 refers to the gradual change in the tilt angle of the flap 2. The movement trajectory of the flap 2 causes the flap 2 to gradually adjust from the state of closing the smoke inlet 11 to the first working state, the second working state, and the third working state.

[0039] The four-bar linkage and the drive mechanism constitute the drive structure assembly that drives the flap 2 to move.

[0040] Reference Figures 3-6 In the first working state, there is a gap between the upper edge of the flap 2 and the upper edge of the smoke inlet 11, forming an upper smoke inlet channel h1; in the second working state, there are gaps between the upper edge and the lower edge of the flap 2 and the upper edge and the lower edge of the smoke inlet 11, respectively, forming an upper smoke inlet channel h1 and a lower smoke inlet channel h2; in the third working state, the flap 2 completely exposes the smoke inlet 11.

[0041] In the first working state, a stable upper smoke inlet channel h1 is formed between the upper edge of the flap 2 and the upper edge of the smoke inlet 11. At this time, the flap 2 only retains the top gap, and the lower edge is still in contact with the lower edge of the smoke inlet 11. This state is suitable for the steaming mode. Since the pot is relatively high in the steaming scenario, such as a steamer, the oil fumes or steam rise mainly vertically after being heated. The gap above the flap 2 can be directly aligned with the direction of the rising airflow, avoiding the dispersion of airflow caused by lateral smoke inhalation, and reducing the ineffective air intake area, so that the suction force is concentrated on the steam and oil fumes at the top. At the same time, the tilt angle formed by the flap 2 during the rotation makes the upper smoke inlet channel h1 wider at the front and narrower at the back, using the Venturi effect to accelerate the airflow and thus increase the emission speed.

[0042] In the second working state, the flap 2 still partially blocks the smoke inlet 11, but the gaps between the upper and lower edges and the smoke inlet 11 exist simultaneously, forming the upper smoke inlet channel h1 and the lower smoke inlet channel h2. This state is suitable for scenarios where two stoves work simultaneously, such as steaming on one side and stir-frying on the other. The upper smoke inlet channel h1 vertically captures the steam from taller cookware, while the lower smoke inlet channel h2 horizontally captures the diffused oil fumes generated by shorter cookware. The forward and reverse swing of the four-bar linkage assembly causes the flap 2 to change its tilt direction during the lifting process, and the cross-sectional ratio of the upper smoke inlet channel h1 and the lower smoke inlet channel h2 is dynamically adjusted accordingly, thereby balancing the intake efficiency of oil fumes and steam at different positions. The middle blocking part of the flap 2 can physically isolate the airflow of the upper and lower channels, reducing the mixing interference of steam from steaming and stir-frying, and avoiding the decrease in smoke extraction efficiency caused by airflow collision.

[0043] In the third working state, the flap 2 fully exposes the smoke inlet 11. At this time, the flap 2 no longer blocks any area, and the smoke inlet 11 is fully open, forming the maximum air intake area. This state is suitable for the stir-fry mode, which is adapted to the characteristics of large amount of oil smoke and wide diffusion range in the stir-fry mode. The fully open smoke inlet 11 can simultaneously capture the vertically rising oil smoke and the smoke that diffuses in all directions. In addition, after the flap 2 is fully raised, it is in a high position, and its own structure can act as a guide plate to further improve the smoke extraction effect.

[0044] In this implementation case, the four-bar linkage achieves the S-shaped composite trajectory of the flap 2 through kinematic pair constraints, referring to... Figure 2 The moving trajectories c1 and c2 of the upper and lower edges of the flap 2 enable the flap 2 to complete the phase switching of forward and reverse swing during the lifting process, avoiding dead points in the movement.

[0045] In this embodiment, the front plate 12 of the smoke collection housing 1 includes a lower front plate 121 and an upper front plate 122 or between the lower front plate 12 and the upper front plate 122. The upper front plate 122 is inclined backward from its lower edge to its upper edge. The smoke inlet 11 is located on the upper front plate 122. The lower front plate 121 is vertically arranged and forms a first guide surface s1 to guide the oil fumes to flow to the smoke inlet 11.

[0046] It should be noted that, in the specific implementation, the direction is defined as follows: the direction in which the smoke collection housing 1 faces the user is defined as the front, the direction in which the smoke collection housing 1 faces away from the user is defined as the rear, and the directions on both sides of the smoke collection housing 1 are defined as the left and right directions.

[0047] The lower part 121 of the front panel remains vertical, forming a first guide surface s1, which can force the diffused oil fumes splashing from the side of the pot in the stir-fry mode to the smoke inlet 11. When the oil fumes hit the lower part 121 of the vertical front panel, the oil fumes are forced to change direction and flow upward along the first guide surface s1, forming a synergistic effect with the negative pressure area of ​​the smoke inlet 11, effectively suppressing the oil fumes from escaping outward.

[0048] In this implementation case, refer to Figure 1 and Figure 2 The front panel 12 has an extension plate 124, which extends from the upper edge of the lower part 121 of the front panel in an upward and rearward direction to the lower edge of the smoke inlet 11. The extension plate 124 and the lower part 121 of the front panel are integral structures, and the extension plate 124 forms a third guide surface s3. The fumes flow upward along the first guide surface s1, and then upward and rearward along the third guide surface s3 to the smoke inlet 11, and flow into the smoke collection housing 1 through the smoke inlet 11 in the second and third working states.

[0049] In this embodiment, the flap 2 is always located behind the plane of the lower part 121 of the front panel in any state between the initial state and the third working state. This ensures that the flap 2 maintains a safe distance from the cookware and avoids collisions between the flap 2 and the cookware during operation, especially for tall cookware such as steamers in steam mode. Furthermore, it is important to note that the flap 2 does not encroach on the cooking area in front of the lower part 121 of the front panel throughout its movement. This prevents the separation of oil fume and airflow caused by the flap 2 protruding outwards. Regardless of the flap 2's position, the vertical guide surface of the lower part 121 of the front panel maintains its complete airflow guiding function, ensuring that oil fumes generated from the cookware directly enter the smoke inlet 11 along the guide surface, eliminating turbulent areas of oil fume caused by sudden changes in the position of the flap 2.

[0050] In this embodiment, a forward-extending baffle plate 123 is connected to the upper edge of the upper part 122 of the front panel to block rising fumes. The baffle plate 123 extends forward from the upper edge of the upper part 122 of the front panel, forming a physical barrier protruding from the outside of the fume collection housing 1. When the fumes rise, the baffle plate 123 directly intercepts their upward path, forcing the fumes to change their direction of movement after contacting the baffle plate 123. Since the baffle plate 123 extends forward, its coverage area exceeds the vertical projection area directly above the cookware, effectively preventing fumes diffusing from the side and rear of the cookware from escaping outward. At the same time, the baffle plate 123 causes the blocked fumes to fall back towards the fume collection housing 1 along the lower surface of the baffle plate 123 under inertia, initially guiding the fumes to gather in the fume inlet 11 area, avoiding disorderly diffusion of fumes outside the fume collection device.

[0051] In addition, the smoke baffle 123 can also serve as a large storage platform, allowing users to place kitchen utensils on it and improve its utilization rate.

[0052] In this embodiment, a distance sensor is provided on the bottom surface of the smoke baffle 123. The distance sensor can be set as a sensor of the type such as optical, infrared, or ultrasonic, to detect the height of the pot, thereby providing a basis for determining whether the flip plate 2 is adjusted to the first working state, the second working state, or the third working state.

[0053] In this embodiment, the upper edge of the smoke inlet 11 and the upper edge of the front plate 122 are spaced apart, such that the upper edge of the front plate 122 forms a second guide surface s2 between its upper edge and the upper edge of the smoke inlet 11. The second guide surface s2 is used to guide the oil fumes blocked by the smoke baffle 123 to flow to the smoke inlet 11. In both the first and second working states, the second guide surface s2 plays a guiding role for oil fumes and steam: when steam or oil fumes rise vertically, the baffle plate 123 directly intercepts these steam or oil fumes. After the blocked steam or oil fumes come into contact with the baffle plate 123, they are affected by negative pressure suction and move along the lower surface of the baffle plate 123 towards the inside of the smoke collection device. The second guide surface s2 then guides the steam or oil fumes smoothly from the root of the baffle plate 123 to the upper smoke inlet channel h1 through its continuous surface, thereby preventing the steam or oil fumes from generating eddies or escaping due to path interruption. At the same time, the geometric constraint of the second guide surface s2 makes the steam more concentrated and enters the smoke collection shell 1 through the upper smoke inlet channel h1, reducing the abrupt change in the flow channel caused by the partial obstruction of the flap plate 2, and ultimately improving the directional capture efficiency of vertically rising steam or oil fumes.

[0054] In this embodiment, when the flap 2 is in the third working state, it is attached to the second guide surface s2, so that the front of the flap 2 plays the role of the second guide surface s2, which is used to guide the oil fumes blocked by the smoke baffle 123 along the front of the flap 2 to the smoke inlet 11.

[0055] In this embodiment, the leading edge of the baffle plate 123 is located within the projection range of the smoke inlet 11 along its opening direction. In the third working state, the leading edge of the baffle plate 123 is directly in the core area of ​​the negative pressure effect of the smoke inlet 11. When the fumes diffuse to this position, they are forced to flow along the lower surface of the baffle plate 123 towards the smoke inlet 11 under the combined effect of the negative pressure suction and the obstruction of the baffle plate 123. This avoids the formation of a "negative pressure blind zone" along the baffle plate 123, preventing the fumes from escaping laterally by bypassing the baffle plate 123. Thus, when the flap 2 is in the third working state, the capture strength of the smoke inlet 11 for the fumes at the leading edge of the baffle plate 123 is improved, and the capture efficiency of the fumes diffused to the side of the cookware is significantly improved, reducing edge escape.

[0056] In this implementation case, refer to Figure 7 and Figure 8 The flap 2 has an internal air duct 21. The air duct 21 has an upper opening 21a and a lower opening 21b along its upper and lower edges, respectively. The air duct 21 essentially occupies the internal space of the flap 2, extending to both sides of the flap 2. In the second working state, the upper opening 21a and lower opening 21b of the air duct 21 are connected. Some of the vertically rising fumes directly enter the smoke collection housing 1 through the upper smoke inlet channel h1, while the remaining fumes enter the air duct 21 from the upper opening 21a, are guided through the internal flow channel to the lower opening 21b, and are then drawn in through the lower smoke inlet channel h2. This forms a dual-path coordinated capture mechanism for the fumes, making the flap 2 itself part of the airflow path. Without adding an additional fan, the flap 2 structure effectively captures the fumes. The oil fumes that might otherwise escape from the upper part are actively guided to the lower smoke inlet channel h2, expanding the effective smoke extraction range. When the resistance of the upper smoke inlet channel h1 increases, the air duct 21 provides a second low-resistance path for the oil fumes from the upper part through the lower smoke inlet channel h2, avoiding airflow congestion. At the same time, the continuous intake of oil fumes in the air duct 21 by the lower smoke inlet channel h2 will create an additional negative pressure at the upper opening 21a, which in turn enhances the suction of the upper smoke inlet channel h1, forming a complementary negative pressure effect between the upper and lower channels, thus solving the problem of uneven suction caused by flow competition between the two channels.

[0057] In this embodiment, the opening size of the lower inlet 21b is not smaller than that of the upper inlet 21a. In the second working state, the setting that the lower inlet 21b is larger than the upper inlet 21a optimizes airflow efficiency through differentiated flow distribution: the larger lower inlet 21b reduces the outlet resistance of the duct 21, allowing more airflow to be smoothly drawn in from the lower smoke inlet channel h2, avoiding turbulence loss caused by the abrupt change in the cross-section of the lower channel; at the same time, the smaller upper inlet 21a accelerates the local airflow through the Venturi effect, forming a higher negative pressure at the top of the upper smoke inlet channel h1, enhancing the adsorption force on the vertically rising steam; the size difference between the two forces the oil fumes to form a pressure gradient from top to bottom in the duct 21, using the high flow rate advantage of the lower channel to compensate for the insufficient local suction of the upper channel, achieving self-balancing of the flow of the two channels.

[0058] In this embodiment, the air duct 21 includes an upper air duct 211 and a lower air duct 212. The upper opening 21a is located at the top of the upper air duct 21, and the lower opening 21b is located at the bottom of the lower air duct 21. The width of the upper air duct 211 is smaller than that of the lower air duct 212. The narrower upper air duct 211 accelerates the airflow through cross-sectional contraction, forming a high negative pressure core area at the upper opening 21a, which specifically enhances the adsorption force on vertically rising steam. The wider lower air duct 212 reduces flow resistance through a large cross-section, avoiding system pressure imbalance caused by the high flow velocity in the narrow upper air duct 21.

[0059] In this embodiment, the flap 2 includes a base plate 22 and a panel 23 connected to the front side of the base plate 22. The size of the panel 23 matches the smoke inlet 11 and is used to seal the smoke inlet 11. The base plate 22 is connected to a four-bar linkage assembly, and the air duct 21 is formed within the base plate 22. The thickness of the base plate 22 is greater than that of the panel 23, and its size is slightly smaller than that of the panel 23, thereby effectively preventing the base plate 22 from colliding with the upper and lower edges of the smoke inlet 11 during operation. The panel 23 can specifically be a glass plate and is fixed to the front side of the base plate 22 by adhesive bonding.

[0060] In this implementation case, refer to Figure 9 and Figure 10The four-bar linkage assembly includes a flap connecting seat 33, a housing connecting seat 34, a first link 31, and a second link 32. The flap connecting seat 33 is connected to the back of the flap 2, and the housing connecting seat 34 is connected to the rear plate inside the smoke collection housing 1. The first link 31 and the second link 32 rotatably connect the flap connecting seat 33 and the housing connecting seat 34, respectively. The distance between the rotational connection point of the first link 31 at the flap connecting seat 33 and the rotational connection point at the housing connecting seat 34 is smaller than the distance between the rotational connection points of the second link 32 at the flap connecting seat 33 and the housing connecting seat 34. Since both the first link 31 and the second link 32 are straight rod structures, the length of the first link 31 is less than the length of the second link 32. This means the rotation radius of the first link 31 is smaller than that of the second link 32. The rotational connection positions of the first link 31 at the flap connecting seat 33 and the housing connecting seat 34 are respectively higher than the rotational connection positions of the second link 32 at both, resulting in a vertical arrangement of the first link 31 and the second link 32. Based on the relative positions and lengths of the first link 31 and the second link 32, the S-shaped composite movement trajectory of the flap 2 is achieved through kinematic pair constraints.

[0061] Another implementation of the four-bar linkage is described in reference to... Figure 11 Similarly, the four-bar linkage assembly includes a flap connecting seat 33, a housing connecting seat 34, a first link 31, and a second link 32. The difference lies in that the distance between the rotational connection point of the first link 31 at the flap connecting seat 33 and the rotational connection point at the housing connecting seat 34 is the same as the distance between the rotational connection points of the second link 32 at the flap connecting seat 33 and the housing connecting seat 34. Since both the first link 31 and the second link 32 are straight rod structures, their lengths are the same, meaning their rotation radii are the same. In this embodiment, the flap 2 does not rotate during the lifting and moving process; therefore, the flap 2 only has a second and a third working state, lacking a first working state. Although this embodiment lacks a first working state, the fact that the first link 31 and the second link 32 are of the same length allows for the interchangeability of parts, thereby effectively reducing costs.

[0062] For the four-bar linkage assembly, the first link 31 and the second link 32 are arranged at intervals in the left and right directions. On the one hand, this can effectively avoid interference and collision between the first link 31 and the second link 32 during rotation. On the other hand, it makes the torques exerted by the first link 31 and the second link 32 on the flap 2 complementary and balanced in the horizontal plane, suppressing the lateral sway of the flap 2 during the lifting and rotation process, and ensuring trajectory accuracy.

[0063] In one implementation, refer to Figure 9The first connecting rod 31 and the second connecting rod 32 are rotatably connected to the left and right sides of the housing connecting seat 34, respectively, so that the first connecting rod 31 and the second connecting rod 32 are spaced apart from each other in the left and right directions. By placing the first connecting rod 31 and the second connecting rod 32 on the left and right sides of the housing connecting seat 34, the forces acting on the housing connecting seat 34 are kept balanced in the left and right directions, effectively avoiding local stress concentration caused by torque superposition, reducing the risk of structural deformation, and improving long-term operational stability and fatigue resistance.

[0064] In another implementation, refer to Figure 13 The flap connecting seat 33 includes two flap connecting split seats 331 arranged at left and right intervals, and the housing connecting seat 34 includes two housing connecting split seats 341 arranged at left and right intervals. The two flap connecting split seats 331 and the two housing connecting split seats 341 are spaced at the same distance and correspond one-to-one. The first connecting rod 31 rotatably connects one flap connecting split seat 331 and one housing connecting split seat 341 respectively, and the second connecting rod 32 rotatably connects the other flap connecting split seat 331 and the other housing connecting split seat 341 respectively. By connecting the first link 31 and the second link 32 to the flap connecting split seat 331 and the housing connecting split seat 341 arranged at intervals on the left and right, the horizontal distance between the two links is significantly increased, forming a wider lever arm support structure. This allows the driving force points of the first link 31 and the second link 32 to be dispersed on the back of the flap 2 in the left and right direction during the lifting and swinging process, thereby avoiding the tilting and shaking problems that occur during the movement of the flap 2, and thus improving the accuracy of the mechanical action.

[0065] In one implementation, refer to Figure 9 The drive mechanism includes a push rod motor 41 and a push rod connecting seat 42. The push rod motor 41 is rotatably connected to the smoke collection housing 1 via a support. The push rod connecting seat 42 is connected to the back of the flap 2. The push rod 421 of the push rod motor 41 is rotatably connected to the push rod connecting seat 42. The push rod connecting seat 42 is specifically connected to the middle area of ​​the back of the flap 2. Two four-bar linkages are provided, located on the left and right sides of the push rod connecting seat 42 respectively and symmetrically arranged about the push rod connecting seat 42.

[0066] In another implementation, refer to Figure 12The smoke collection housing 1 is equipped with a synchronizing rod 35 extending in the left-right direction. The first two rods or the second connecting rod 32 of the four-bar linkage assembly serve as connecting rods and are connected to the synchronizing rod 35. By adding the transverse synchronizing rod 35 and connecting it to the four-bar linkage assembly, the first connecting rod 31 and the second connecting rod 32 of the four-bar linkage assembly can be forced to rotate synchronously during the movement of the flap 2. This eliminates the problem of the flap 2 twisting and swinging asynchronously due to the deviation of the driving force on one side or uneven load, ensuring that the flap 2 always maintains a horizontal posture during lifting and forward and reverse swinging, thereby avoiding the flap 2 from tilting. At the same time, the synchronizing rod 35, as a transverse reinforcing beam, together with the four-bar linkage assembly, forms a spatial truss structure, which significantly improves the overall bending stiffness of the mechanism and extends its service life.

[0067] In this embodiment, the drive mechanism includes a push rod motor 41 and a push rod connecting seat 42. The push rod motor 41 is rotatably connected to the smoke collection housing 1 via a support, and the push rod connecting seat 42 is connected to the synchronizing rod 35. The push rod 421 of the push rod motor 41 is rotatably connected to the push rod connecting seat 42. The connection between the push rod connecting seat 42 and the synchronizing rod 35 ensures that the driving force of the push rod motor 41 is transmitted simultaneously and equally to each four-bar linkage through the lateral rigidity transmission characteristics of the synchronizing rod 35, thus completely eliminating the problem of asynchronous left and right movement of the flap 2 caused by lag or deviation of unilateral driving force.

[0068] In this embodiment, a synchronizing rod reinforcing seat 36 is provided inside the smoke collection housing 1. The push rod connecting seat 42 is rotatably connected to the synchronizing rod reinforcing seat 36, and the rotation axis of the push rod connecting seat 42 on the synchronizing rod reinforcing seat 36 is coaxial with the rotation axis of the connecting rod on the housing connecting seat 34. By making the rotation axis of the push rod connecting seat 42 coaxial with the rotation axis of the connecting rod on the housing connecting seat 34, a system with consistent axial force transmission is constructed: when the driving force is transmitted from the push rod motor 41 to the four-bar linkage through the synchronizing rod reinforcing seat 36, the coaxial design ensures that the direction of the force of the push rod 421 is completely coincident with the direction of the lever arm of the four-bar linkage, eliminating the additional bending moment caused by the misalignment of the axes; at the same time, the synchronizing rod reinforcing seat 36 provides additional rigid support for the synchronizing rod 35, preventing the synchronizing rod 35 from undergoing lateral bending deformation due to cantilever force, ensuring that the driving force is transmitted to the two-sided four-bar linkage without loss, and preventing plastic deformation caused by fatigue during high-frequency reciprocating motion, thus ensuring the long-term stability of the movement trajectory of the flap 2.

[0069] In this implementation case, refer to Figure 14A sealing plate 13 is provided inside the smoke collection housing 1. The sealing plate 13 and the flap 2 define a closed space inside the smoke collection housing 1. The four-bar linkage assembly is located in the closed space. The sealing plate 13 is provided with a relief groove 131 that allows the first link 31 and the second link 32 to extend. The back of the flap 2 is provided with a baffle 132 located below the relief groove 131. During the process of adjusting the flap 2 from the state of closing the smoke inlet 11 to the third working state, the baffle 132 gradually approaches the sealing plate 13 and closes the relief groove 131.

[0070] Reference Figure 15 and Figure 16 The closed space formed by the sealing plate 13 and the flap 2 accommodates the four-bar linkage assembly. During the movement of the flap 2, the baffle 132 dynamically closes the avoidance groove 131, which can achieve oil fume path isolation and mechanical structure protection. When oil fume enters the smoke collection shell 1, the sealing plate 13 physically prevents oil fume from penetrating into the closed space. The avoidance groove 131 is gradually covered by the baffle 132 when the flap 2 moves, forming a dynamic sealing barrier. Especially when the flap 2 is fully opened to the second and third working states, the baffle 132 closes the avoidance groove 131, preventing oil fume from entering the closed space through the groove and contacting the four-bar linkage assembly. This completely places the four-bar linkage assembly outside the oil fume path, fundamentally preventing oil fume from condensing and depositing on the hinge points and connecting rod surfaces, significantly reducing the risk of mechanical jamming and extending the service life of the mechanism.

[0071] Implementation Case 2:

[0072] An integrated stove includes a smoke collection device, as shown in Embodiment 1.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A smoke collection device, characterized in that, It includes a smoke collection shell (1) with a smoke inlet (11), a flap (2) that closes the smoke inlet (11), and a drive structure assembly. The drive structure assembly is used to drive the flap (2) to move, so as to lift and gradually expose the smoke inlet (11). An air duct (21) is formed inside the flap (2). The air duct (21) forms an upper opening (21a) and a lower opening (21b) on the upper and lower edges of the flap (2), respectively.

2. The smoke collection device according to claim 1, characterized in that, The opening size of the lower port (21b) is not smaller than the opening size of the upper port (21a).

3. The smoke collection device according to claim 2, characterized in that, The air duct (21) includes an upper air duct (211) and a lower air duct (212). The upper opening (21a) is located at the top of the upper air duct (211), and the lower opening (21b) is located at the bottom of the lower air duct (212). The width of the upper air duct (211) is smaller than that of the lower air duct (212).

4. The smoke collection device according to claim 1, characterized in that, The flap (2) includes a base plate (22) and a panel (23) connected to the front side of the base plate (22); the panel (23) is used to close the smoke inlet (11), the base plate (22) is connected to the drive structure assembly, and the air duct (21) is formed in the base plate (22).

5. The smoke collection device according to any one of claims 1-4, characterized in that, The front plate (12) of the smoke collection housing (1) includes a lower part (121) and an upper part (122); the upper part (122) is inclined backward from its lower edge to its upper edge, and the smoke inlet (11) is located on the upper part (122); the lower part (121) is vertically arranged and forms a first guide surface (s1) to guide the oil fumes to flow to the smoke inlet (11).

6. The smoke collection device according to claim 5, characterized in that, The upper edge of the upper part (122) of the front plate is connected to a forward-extending smoke baffle (123) for blocking rising fumes.

7. The smoke collection device according to claim 6, characterized in that, The upper edge of the smoke inlet (11) and the upper edge of the front plate (122) are spaced apart, such that the upper edge of the front plate (122) forms a second guide surface (s2) between its upper edge and the upper edge of the smoke inlet (11), which is used to guide the oil fumes blocked by the smoke baffle (123) to flow to the smoke inlet (11).

8. The smoke collection device according to any one of claims 1-4, characterized in that, The smoke collection housing (1) is provided with a sealing plate (13), and the sealing plate (13) and the flap (2) define a closed space within the smoke collection housing (1); the drive structure assembly includes at least one four-bar assembly disposed within the smoke collection housing (1) and connected to the flap (2), and a drive mechanism that provides driving force to the flap (2), the four-bar assembly being located within the closed space; the sealing plate (13) is provided with a clearance groove (131) that allows the connecting rod of the four-bar assembly to extend.

9. The smoke collection device according to claim 8, characterized in that, The back of the flap (2) is provided with a baffle (132) located below the clearance groove (131). As the flap (2) gradually rises while the smoke inlet (11) is closed, the baffle (132) gradually approaches the sealing plate (13) and closes the clearance groove (131).

10. An integrated stove, characterized in that, Includes the smoke collection device according to any one of claims 1-9.

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