Oil smoke treatment device

Abstract

The invention relates to the technical field of household appliances, in particular to an oil fume treatment device. The cooking fume treatment device comprises a shell, a turning plate mechanism and a telescopic oil net, the turning plate mechanism can turn over relative to the shell, oil net holes are formed in the telescopic oil net, one end of the telescopic oil net is movably connected with the shell, and the other end of the telescopic oil net is movably connected with the turning plate mechanism; the actual air inlet area of the oil net holes is increased along with the increase of the opening angle of the turning plate mechanism, and the posture of the telescopic oil net is adaptively adjusted along with the opening state of the turning plate mechanism. According to the oil fume treatment device, the oil fume suction and exhaust effects and the dynamic balance of relatively low energy consumption of the oil fume treatment device can be realized, and relatively good use performance of the oil fume treatment device can be ensured aiming at different oil fume conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and particularly to an oil fume treatment device. Background Art

[0002] In the prior art, an oil fume machine includes a housing, a flap mechanism and a driving mechanism. Among them, the driving mechanism can drive the flap mechanism to switch between an open position and a closed position. When the flap mechanism is in the open position, the flap mechanism can achieve a good gathering effect on the oil fume, and the flap mechanism can guide a large amount of oil fume into the main chassis well.

[0003] The oil fume machine in the prior art also includes an oil screen, which is arranged at the air inlet of the housing and fixedly connected to the housing. The oil screen holes of the oil screen are fixed, and the fixed air inlet area and angle cannot adapt to different cooking intensities and oil fume amounts, resulting in unstable oil fume suction and exhaust effects. Especially when the oil fume amount is large, the suction and exhaust efficiency is low. In addition, for oil fume, when the negative pressure of oil fume inhalation is the same, the larger the oil screen hole, the greater the air volume required by the oil fume treatment device, and the more power-consuming. Therefore, when the oil fume amount is small, theoretically not much air volume is required, and the fixed air inlet area causes the fan to run at a high load for a long time, increasing the energy consumption of the oil fume treatment device.

[0004] Therefore, it is urgent to design a new oil fume treatment device to improve the problems of unstable oil fume suction and exhaust effects and high energy consumption of the oil fume machine. Summary of the Invention

[0005] The purpose of the present invention is to provide an oil fume treatment device, which can achieve the dynamic balance of the oil fume suction and exhaust effect and the relatively low energy consumption of the oil fume treatment device, and can ensure that the oil fume treatment device reaches a relatively good use performance for different oil fume situations.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] An oil fume treatment device, comprising:

[0008] A housing;

[0009] A flap mechanism capable of flipping relative to the housing; and

[0010] A telescopic oil screen provided with oil screen holes, one end of the telescopic oil screen is movably connected to the housing, the other end of the telescopic oil screen is movably connected to the flap mechanism, the actual air inlet area of the oil screen holes increases with the increase of the opening angle of the flap mechanism, and the posture of the telescopic oil screen is adaptively adjusted according to the opening state of the flap mechanism.

[0011] As an optional solution, the telescopic oil screen includes:

[0012] The first oil screen is rotatably connected to the housing, and a first oil screen hole is formed in the first oil screen; and

[0013] The second oil screen is slidably connected to the first oil screen and rotatably connected to the flap mechanism. A second oil screen hole is formed in the second oil screen, and the flap mechanism can be switched between a fully open position and a closed position;

[0014] When the flap mechanism is in the fully open position, the first oil screen hole is completely aligned with the second oil screen hole; when the flap mechanism is in the closed position, the first oil screen hole is offset from the second oil screen hole.

[0015] As an alternative solution, when the flap mechanism is in the fully open position, the projection of the second oil screen hole on the first oil screen is completely located within the first oil screen hole; when the second oil screen moves relative to the first oil screen in a first direction, the flap mechanism switches from the fully open position to the closed position, and the air resistance of the channel formed by the first oil screen hole and the second oil screen hole remains unchanged.

[0016] As an alternative solution, along the first direction, the dimension of the second oil screen hole in a second direction gradually increases, and both the first direction and the second direction are coplanar with the second oil screen.

[0017] As an alternative solution, the second oil screen hole has two first outer contour curves, and the two first outer contour curves are arranged at intervals in the second direction. Along the first direction, the angle between the tangent of the first outer contour curve and the first direction first increases and then decreases.

[0018] As an alternative solution, the second oil screen hole has two first outer contour curves, and the two first outer contour curves are arranged at intervals in the second direction. The flap mechanism is hinged to the housing at a first hinge point T, the flap mechanism is hinged to the telescopic oil screen at a second hinge point E, and the telescopic oil screen is hinged to the housing at a third hinge point W;

[0019] Wherein, the function f(L) of the first outer contour curve satisfies the following relational expression:

[0020]

[0021] Wherein, L is the elongation length of the telescopic oil screen; α% is the percentage of the air volume of a preset gear in the air volume of the oil fume treatment device operating at a strong gear; λ represents the friction resistance coefficient at the strong gear; η represents the compensation coefficient at the strong gear; λ ％ represents the friction resistance coefficient at the preset gear; η ％It represents the compensation coefficient at the preset gear position; r is the distance between the TE; β is the angle between the TW and the TE when the channel is closed; β' is the angle between the TW and the EW when the channel is closed; γ is the angle between the TE when the channel is closed and the TE when the channel is fully open; γ' is the angle between the EW when the channel is closed and the EW when the channel is fully open.

[0022] As an alternative solution, the first oil screen holes are provided with at least two, and at least two of the first oil screen holes are arranged at intervals along the relative sliding direction of the first oil screen and the second oil screen, and each of the first oil screen holes is correspondingly provided with one of the second oil screen holes.

[0023] As an alternative solution, the telescopic oil screen further includes:

[0024] A guiding component, which is arranged between the first oil screen and the second oil screen, and the guiding component is configured to make the first oil screen and the second oil screen slide along a first direction.

[0025] As an alternative solution, the guiding component includes a slider and a guide rail, one of the slider and the guide rail is arranged on the first oil screen, and the other of the two is arranged on the second oil screen, the guide rail extends along the first direction, and the slider is arranged on the guide rail and can slide along the guide rail.

[0026] As an alternative solution, the first oil screen is in surface contact with the second oil screen, and the guiding component includes:

[0027] A first guiding member, which is fixedly connected to the first oil screen, and the first guiding member is slidably connected to the side edge of the second oil screen; and / or

[0028] A second guiding member, which is fixedly connected to the second oil screen, and the first guiding member is slidably connected to the side edge of the first oil screen.

[0029] As an alternative solution, a first limiting member is arranged on the second oil screen, and the first guiding member is matched with the first limiting member to make the first oil screen hole and the corresponding second oil screen hole completely aligned; and / or

[0030] A second limiting member is arranged on the first oil screen, and the second guiding member is matched with the second limiting member to make the first oil screen hole and the corresponding second oil screen hole completely aligned; and / or

[0031] The first guiding member and the second guiding member are arranged on the same side of the first oil screen, and the first guiding member and the second guiding member are matched to make the first oil screen hole and the corresponding second oil screen hole completely aligned.

[0032] As an alternative solution, the fume treatment device further includes:

[0033] A first elastic deformation member, the first oil screen and the outer shell are connected through the first elastic deformation member; and / or

[0034] A second elastic deformation member, the second oil screen and the flap mechanism are connected through the second elastic deformation member.

[0035] As an alternative solution, the first elastic deformation member is located below the second elastic deformation member; wherein, the first elastic deformation member has a critical force F of the first elastic member 临界1 , where F 临界1 satisfies the following relationship: F 临界1 ≥F m -(G1 + G2)*cosγ;

[0036] In the formula, F m is the maximum static friction force between the first oil screen and the second oil screen; G1 is the gravity of the first oil screen; G2 is the gravity of the second oil screen; γ is the included angle between the extension direction of the flap mechanism and the vertical direction when the flap mechanism is in the fully open position.

[0037] As an alternative solution, the first elastic deformation member is located below the second elastic deformation member; wherein, the second elastic deformation member has a critical force F of the second elastic member 临界2 , where F 临界2 satisfies the following relationship: F 临界2 ≥F m +(G1 + G2)*cosγ;

[0038] In the formula, F m is the maximum static friction force between the first oil screen and the second oil screen; G1 is the gravity of the first oil screen; G2 is the gravity of the second oil screen; γ is the included angle between the extension direction of the telescopic oil screen and the vertical direction when the flap mechanism is in the fully open position.

[0039] Advantages of the present invention:

[0040] The fume treatment device provided by the present invention includes an outer shell, a flap mechanism and a telescopic oil screen. The flap mechanism can flip relative to the outer shell. The telescopic oil screen is provided with oil screen holes. One end of the telescopic oil screen is movably connected to the outer shell, and the other end of the telescopic oil screen is movably connected to the flap mechanism. The actual air inlet area of the oil screen holes increases with the increase of the opening angle of the flap mechanism, and the attitude of the telescopic oil screen is adaptively adjusted according to the opening state of the flap mechanism.

[0041] As the amount of oil fume increases, the opening angle of the flap mechanism increases, enabling a better gathering and absorption effect for a large amount of oil fume. The actual air intake area of the oil mesh holes also increases accordingly, and the telescopic oil mesh moves downward as a whole. The larger air intake area and the lower oil mesh holes can suck and exhaust a large amount of oil fume with a high suction and exhaust efficiency, achieving a better suction and exhaust effect for the oil fume. When the amount of oil fume is small, the opening angle of the flap mechanism is small. The flap mechanism can achieve a sufficient gathering and absorption effect for a small amount of oil fume, and the actual air intake area of the oil mesh holes is relatively small. The smaller air intake area can meet the suction and exhaust effect of a small amount of oil fume, and can also prevent the main chassis from running at a high load for a long time, effectively reducing the energy consumption of the oil fume treatment device.

[0042] In summary, through the oil fume treatment device of the present invention, the dynamic balance between the suction and exhaust effect of the oil fume and the relatively low energy consumption of the oil fume treatment device can be achieved. For different oil fume conditions, the oil fume treatment device can ensure relatively good performance. Brief Description of the Drawings

[0043] Figure 1 is a schematic structural diagram of the flap mechanism of the oil fume treatment device provided in Embodiment 1 of the present invention in the closed position;

[0044] Figure 2 is a schematic structural diagram of the flap mechanism of the oil fume treatment device provided in Embodiment 1 of the present invention in the fully open position;

[0045] Figure 3 is a first schematic structural diagram of the telescopic oil mesh in the contracted state provided in Embodiment 1 of the present invention;

[0046] Figure 4 is a second schematic structural diagram of the telescopic oil mesh in the contracted state provided in Embodiment 1 of the present invention;

[0047] Figure 5 is a first schematic structural diagram of the telescopic oil mesh in the extended state provided in Embodiment 1 of the present invention;

[0048] Figure 6 is a second schematic structural diagram of the telescopic oil mesh in the extended state provided in Embodiment 1 of the present invention;

[0049] Figure 7 is a schematic structural diagram of the flap mechanism of the oil fume treatment device provided in Embodiment 2 of the present invention in the closed position;

[0050] Figure 8 is Figure 7 a partial enlarged view of part A in

[0051] Figure 9 is Figure 7 a partial enlarged view of part B in

[0052] Figure 10 It is a schematic structural diagram of the flap mechanism of the oil fume treatment device provided in the second embodiment of the present invention in the fully open position;

[0053] Figure 11 It is the first schematic structural diagram of the first telescopic oil screen provided in the second embodiment of the present invention in the contracted state;

[0054] Figure 12 It is the second schematic structural diagram of the first telescopic oil screen provided in the second embodiment of the present invention in the contracted state;

[0055] Figure 13 It is the first schematic structural diagram of the first telescopic oil screen provided in the second embodiment of the present invention in the extended state;

[0056] Figure 14 It is the second schematic structural diagram of the first telescopic oil screen provided in the second embodiment of the present invention in the extended state;

[0057] Figure 15 It is the force analysis diagram of the first elastic deformation member and the second elastic deformation member provided in the second embodiment of the present invention;

[0058] Figure 16 It is the first schematic structural diagram of the second telescopic oil screen provided in the second embodiment of the present invention in the contracted state;

[0059] Figure 17 It is the second schematic structural diagram of the second telescopic oil screen provided in the second embodiment of the present invention in the contracted state;

[0060] Figure 18 It is the first schematic structural diagram of the second telescopic oil screen provided in the second embodiment of the present invention in the extended state;

[0061] Figure 19 It is the second schematic structural diagram of the second telescopic oil screen provided in the second embodiment of the present invention in the extended state;

[0062] Figure 20 It is the first schematic structural diagram of the third telescopic oil screen provided in the second embodiment of the present invention in the contracted state;

[0063] Figure 21 It is the second schematic structural diagram of the third telescopic oil screen provided in the second embodiment of the present invention in the contracted state;

[0064] Figure 22 It is the first schematic structural diagram of the third telescopic oil screen provided in the second embodiment of the present invention in the extended state;

[0065] Figure 23It is the second structural schematic diagram of the third telescopic oil screen provided in the second embodiment of the present invention when it is in the extended state;

[0066] Figure 24 It is the structural schematic diagram of the flap mechanism provided in the third embodiment of the present invention when it is in the contracted state;

[0067] Figure 25 It is the structural schematic diagram of the first oil screen provided in the fourth embodiment of the present invention;

[0068] Figure 26 It is the structural schematic diagram of the second oil screen provided in the fourth embodiment of the present invention;

[0069] Figure 27 It is the schematic diagram of the principle of the telescopic oil screen provided in the fourth embodiment of the present invention in different states;

[0070] Figure 28 It is the structural schematic diagram of the first outer contour curve provided in the fourth embodiment of the present invention.

[0071] In the figure:

[0072] 100, oil fume treatment device;

[0073] 10, telescopic oil screen; 11, first oil screen; 111, first oil screen hole; 112, second limiting member; 12, second oil screen; 121, second oil screen hole; 1211, first outer contour curve; 122, first limiting member;

[0074] 20, housing; 21, air inlet;

[0075] 30, flap mechanism;

[0076] 40, guiding component; 41, slider; 42, guide rail; 43, first guiding member; 44, second guiding member;

[0077] 50, first elastic deformation member;

[0078] 60, second elastic deformation member;

[0079] 70, driving mechanism. Detailed implementation manners

[0080] The technical solution of the present invention will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that for the convenience of description, only the parts related to the present invention are shown in the drawings rather than all.

[0081] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0082] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0083] In the description of the embodiments of the present disclosure, the orientation or positional relationships such as "above", "below", "left", and "right" are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and do not have special meanings.

[0084] Embodiment 1

[0085] As Figures 1 - 2 shown, the embodiments of the present disclosure provide an oil fume treatment device 100. The oil fume treatment device 100 includes a main chassis (not shown in the figure) and a smoke collecting cavity assembly that are connected and communicated. Among them, a fan is provided in the main chassis, and the smoke collecting cavity assembly has an air inlet 21. When the main chassis is working, the oil fume outside the oil fume treatment device 100 can enter from the air inlet 21. The oil fume sequentially passes through the smoke collecting cavity assembly and the main chassis, and the oil fume is purified in the main chassis. The purified gas is discharged from the air outlet (not shown in the figure) of the main chassis to an external pipeline or the indoor.

[0086] In the prior art, the smoke collecting cavity assembly includes a housing 20, a flap mechanism 30, and a driving mechanism 70. Among them, the driving mechanism 70 can drive the flap mechanism 30 to switch between an open position and a closed position. When the flap mechanism 30 is in the open position, the flap mechanism 30 can achieve a good gathering effect on the oil fume, and the flap mechanism 30 can guide a large amount of oil fume to enter the main chassis well.

[0087] The oil fume treatment device 100 in the prior art further includes an oil screen, which is arranged at the air inlet 21 and fixedly connected to the outer shell 20. The oil screen holes of the oil screen are fixed and unchangeable, and the fixed air inlet area and angle cannot adapt to different cooking intensities and oil fume amounts, resulting in unstable oil fume suction and exhaust effects. Especially when the oil fume amount is large, the suction and exhaust efficiency is low. In addition, for oil fume, when the negative pressure of oil fume inhalation is the same, the larger the oil screen hole, the larger the air volume required by the oil fume treatment device 100, and the more power-consuming it is. When the oil fume amount is small, theoretically not much air volume is required. The fixed air inlet area causes the fan to run at a high load for a long time, increasing the energy consumption of the oil fume treatment device 100.

[0088] To solve the above problems, as Figures 1 - 6 shown, the oil fume treatment device 100 includes an outer shell 20, an outer shell 20, a flap mechanism 30 and a telescopic oil screen 10. Among them, the flap mechanism 30 can rotate relative to the outer shell 20. The telescopic oil screen 10 is provided with oil screen holes. One end of the telescopic oil screen 10 is movably connected to the outer shell 20, and the other end of the telescopic oil screen 10 is movably connected to the flap mechanism 30. The actual air inlet area of the oil screen holes increases with the increase of the opening angle of the flap mechanism 30, and the posture of the telescopic oil screen 10 is adaptively adjusted according to the opening state of the flap mechanism 30. As the oil fume amount increases, the opening angle of the flap mechanism 30 increases, which can achieve a better gathering and absorption effect for a larger oil fume amount. The actual air inlet area of the oil screen holes also increases accordingly, and the whole telescopic oil screen 10 moves downward. The larger air inlet area and the lower oil screen holes can suck and exhaust a larger oil fume amount with a higher suction and exhaust efficiency, achieving a better suction and exhaust effect for oil fume. When the oil fume amount is small, the opening angle of the flap mechanism 30 is small. The flap mechanism 30 can achieve a sufficient gathering and absorption effect for a smaller oil fume amount, and the actual air inlet area of the oil screen holes is relatively small. The smaller air inlet area can meet the suction and exhaust effect of a smaller oil fume amount, and can also prevent the main chassis from running at a high load for a long time, effectively reducing the energy consumption of the oil fume treatment device 100.

[0089] In summary, through the oil fume treatment device 100 of the embodiments of the present disclosure, a dynamic balance between the suction and exhaust effect of oil fume and the relatively low energy consumption of the oil fume treatment device 100 can be achieved. For different oil fume conditions, the oil fume treatment device 100 can be ensured to achieve relatively good use performance.

[0090] In an alternative embodiment, as Figures 3 - 5As shown, the telescopic oil screen 10 includes a first oil screen 11 and a second oil screen 12. The first oil screen 11 is rotatably connected to the outer shell 20. A first oil screen hole 111 is formed in the first oil screen 11. The second oil screen 12 is slidably connected to the first oil screen 11 and rotatably connected to the flap mechanism 30. A second oil screen hole 121 is formed in the second oil screen 12. The flap mechanism 30 can be switched between a fully open position and a closed position. As Figure 5 and Figure 6 shown, when the flap mechanism 30 is in the fully open position, the telescopic oil screen 10 is in the extended state, and the first oil screen hole 111 is completely aligned with the second oil screen hole 121; as Figure 3 and Figure 4 shown, when the flap mechanism 30 is in the closed position, the telescopic oil screen 10 is in the contracted state, and the first oil screen hole 111 is offset from the second oil screen hole 121. With the above simple structure and through the simple relative movement between the first oil screen 11 and the second oil screen 12, it is possible to make the actual air inlet area of the oil screen holes increase as the opening angle of the flap mechanism 30 increases, and it is possible to quickly and accurately adjust the actual air inlet area.

[0091] In an alternative embodiment, as Figure 4 and Figure 6 shown, the first oil screen holes 111 are provided with at least two. The at least two first oil screen holes 111 are arranged at intervals along the relative sliding direction of the first oil screen 11 and the second oil screen 12. A second oil screen hole 121 is correspondingly arranged for each first oil screen hole 111. When the flap mechanism 30 is in the fully open position, the first oil screen hole 111 is completely aligned with the correspondingly arranged second oil screen hole 121; when the flap mechanism 30 is in the closed position, the second oil screen hole 121 is blocked by the first oil screen 11. Through the arrangement of at least two first oil screen holes 111 and second oil screen holes 121, a better filtering and separation effect on oil fume can be achieved.

[0092] In an alternative embodiment, as Figures 3 - 6 shown, the telescopic oil screen 10 further includes a guiding component 40. The guiding component 40 is arranged between the first oil screen 11 and the second oil screen 12. The guiding component 40 is used to make the first oil screen 11 and the second oil screen 12 slide along a first direction. The arrangement of the guiding component 40 can ensure the precise adjustment of the relative positions of the first oil screen 11 and the second oil screen 12, and avoid the deviation of the first oil screen 11 and the second oil screen 12 during the relative position adjustment process, so as to achieve the precise adjustment of the actual air inlet area of the oil screen holes.

[0093] In an alternative embodiment, as Figures 3 - 6As shown, the first oil screen 11 is in surface contact with the second oil screen 12. The guiding assembly 40 includes a first guiding member 43. The first guiding member 43 is fixedly connected to the first oil screen 11 and is slidably connected to the side of the second oil screen 12. On the premise of effectively guiding the relative movement of the first oil screen 11 and the second oil screen 12, it can also prevent a smoke leakage gap from being formed between the first oil screen 11 and the second oil screen 12, avoid the outward overflow of oil fume from the smoke leakage gap, ensure that more oil fume can enter the interior of the housing 20, and effectively improve the oil fume extraction effect of the oil fume treatment device 100.

[0094] In an alternative embodiment, as Figures 3 - 6 shown, a first limiting member 122 is provided on the second oil screen 12. The first guiding member 43 cooperates with the first limiting member 122 to make the first oil screen holes 111 and the corresponding second oil screen holes 121 exactly aligned. Through the setting of the first limiting member 122, it can be ensured that the first oil screen holes 111 and the corresponding second oil screen holes 121 are exactly aligned, and avoid excessive or insufficient adjustment of the relative positions of the first oil screen 11 and the second oil screen 12.

[0095] Embodiment Two

[0096] As Figures 7 - 19 shown, this embodiment discloses an oil fume treatment device 100, and the structure of this oil fume treatment device 100 is basically the same as that of the oil fume treatment device 100 in Embodiment One.

[0097] Regarding the oil fume treatment device 100 in Embodiment One, due to the installation error of the oil fume treatment device 100, when the flap mechanism 30 is opened to the maximum state as designed, the first oil screen holes 111 and the second oil screen holes 121 are not exactly aligned, which will affect the suction and exhaust effect of a large amount of oil fume.

[0098] To solve the above problems, as Figure 7 、 Figures 9 - 14 shown, the oil fume treatment device 100 further includes a first elastic deformation member 50. The first oil screen 11 and the housing 20 are connected through the first elastic deformation member 50. On this basis, the actual maximum opening degree of the flap mechanism 30 can be slightly greater than the designed maximum opening degree to make the first oil screen holes 111 and the corresponding second oil screen holes 121 exactly aligned. In addition, because there is Figures 11 - 14The first guiding member 43 is in limiting cooperation with the first limiting member 122. And due to the provision of the first elastic deformation member 50, when the first oil mesh hole 111 and its corresponding second oil mesh hole 121 are completely aligned, and when the flap mechanism 30 continues to open, it can ensure that the relative positions of the first oil mesh 11 and the second oil mesh 12 remain unchanged, and can also prevent the flap mechanism 30 from being hard pulled, avoiding damage to the oil fume treatment device 100, thereby minimizing the problem of poor alignment between the first oil mesh hole 111 and the second oil mesh hole 121 caused by installation errors to the greatest extent.

[0099] In an alternative embodiment, as Figures 9 - 14 shown, the oil fume treatment device 100 may also only include a second elastic deformation member 60. The second oil mesh 12 and the flap mechanism 30 are connected by the second elastic deformation member 60. Through the provision of the second elastic deformation member 60, the foregoing effects of the first elastic deformation member 50 can also be achieved.

[0100] In an alternative embodiment, as Figure 7 、 Figures 9 - 14 shown, the first elastic deformation member 50 and the second elastic deformation member 60 can be provided simultaneously. By providing the first elastic deformation member 50 and the second elastic deformation member 60 simultaneously, a greater elastic displacement of the flap mechanism 30 can be achieved, and the problem of hard pulling of the flap mechanism 30 can be further avoided, and damage to the oil fume treatment device 100 can be further avoided.

[0101] In an alternative embodiment, as Figure 15 shown, the first elastic deformation member 50 is located below the second elastic deformation member 60; wherein, the first elastic deformation member 50 has a first elastic member critical force F 临界1 , wherein, F 临界1 satisfies the following relationship:

[0102] F 临界1 ≥F m -(G1 + G2)*cosγ;

[0103] In the formula, F m is the maximum static friction force between the first oil mesh 11 and the second oil mesh 12; G1 is the gravity of the first oil mesh 11; G2 is the gravity of the second oil mesh 12; γ is the angle between the extension direction of the flap mechanism 30 and the vertical direction when the flap mechanism 30 is in the fully open position.

[0104] Through the foregoing F 临界1The setting can ensure that during the opening process of the flap mechanism 30, actions occur sequentially among various structures, so as to ensure that the first oil mesh holes 111 and the corresponding second oil mesh holes 121 are exactly aligned. Specifically, with the opening action of the flap mechanism 30, the first oil mesh 11 and the second oil mesh 12 first overcome the maximum static friction force F m to achieve relative sliding; then, under the cooperation of the first guiding member 43 and the first limiting member 122, the relative positions of the first oil mesh 11 and the second oil mesh 12 are locked, and the first oil mesh 11 and the second oil mesh 12 become an integral structure with unchanged relative positions to keep the first oil mesh holes 111 and the corresponding second oil mesh holes 121 exactly aligned; then, as the flap mechanism 30 continues to open, the first elastic deformation member 50 and the second elastic deformation member 60 undergo elastic deformation to avoid hard pulling of the flap mechanism 30 and damage to the flap mechanism 30.

[0105] Specifically, Figure 15 shows the force analysis of the first elastic deformation member 50, where F 合1 =F 拉1 -(G1 + G2)*cosγ, where F 合1 is the first resultant force received by the first elastic deformation member 50. When the force applied by the driving mechanism 70 to the flap mechanism 30 is small, F 拉1 ≤ the maximum static friction force F m , the first oil mesh 11 and the second oil mesh 12 do not have relative sliding. When the driving mechanism 70 applies a large force to the flap mechanism 30, F 拉1 ≥F m , only then can the relative sliding of the first oil mesh 11 and the second oil mesh 12 be achieved. It is also known that the first resultant force F 合1 received by the first elastic deformation member 50 = F 拉1 -(G1 + G2)*cosγ. Only when F 合1 >F 临界1 , will the first elastic deformation member 50 deform. That is to say, before and during the sliding of the first oil mesh 11 and the second oil mesh 12, it is necessary to design the F 临界1 of the first elastic deformation member 50 to avoid deformation of the first elastic deformation member 50. That is to say, when F 拉1 =F m , it is necessary to make F 合1 ≤F 临界1 , that is, F m -(G1 + G2)*cosγ≤F 临界1, by designing the first elastic deformation member 50 in the foregoing manner, it can be ensured that during the opening process of the flap mechanism 30, the first oil screen 11 and the second oil screen 12 slide relative to each other first. After the first oil screen holes 111 and the second oil screen holes 121 are aligned, the first elastic deformation member 50 deforms, so as to realize the sequential movement of each structure.

[0106] In an alternative embodiment, as Figure 15 shown, the first elastic deformation member 50 is located below the second elastic deformation member 60; wherein, the second elastic deformation member 60 has a second elastic member critical force F 临界2 , wherein, F 临界2 satisfies the following relationship:

[0107] F 临界2 ≥F m +2*(G1 + G2)*cosγ;

[0108] In the formula, F m is the maximum static friction force between the first oil screen 11 and the second oil screen 12; G1 is the gravity of the first oil screen 11; G2 is the gravity of the second oil screen 12; γ is the angle between the extension direction of the telescopic oil screen 10 and the vertical direction when the flap mechanism 30 is in the fully open position.

[0109] Specifically, Figure 15 shows the force analysis of the second elastic deformation member 60, wherein, F 合2 =F 拉2 +(G1 + G2)*cosγ, wherein, F 合2 is the second resultant force received by the second elastic deformation member 60. When the force applied by the driving mechanism 70 to the flap mechanism 30 is small, F 拉2 ≤ the maximum static friction force F m , and the first oil screen 11 and the second oil screen 12 do not slide relative to each other. When the driving mechanism 70 applies a large force to the flap mechanism 30, F 拉2 ≥F m , then the relative sliding of the first oil screen 11 and the second oil screen 12 can be realized. It is also known that the first resultant force F 合2 received by the second elastic deformation member 60 = F 拉2 +(G1 + G2)*cosγ. Only when F 合2 >F 临界2 , the second elastic deformation member 60 will deform. That is to say, before and during the sliding of the first oil screen 11 and the second oil screen 12, it is necessary to design the F 临界2 of the second elastic deformation member 60 to avoid the deformation of the second elastic deformation member 60. That is to say, when F 拉2 =F m , it is necessary to make F 合2≤F 临界2 , that is, F m +(G1 + G2)*cosγ ≤ F 临界2 , by designing the second elastic deformation member 60 in the foregoing manner, it can be ensured that during the opening process of the flap mechanism 30, the first oil screen 11 and the second oil screen 12 first slide relative to each other. After the first oil screen holes 111 and the second oil screen holes 121 are aligned, the second elastic deformation member 60 deforms, so as to realize the sequential movement of each structure.

[0110] In an alternative embodiment, as Figures 16 - 19 shown, the first oil screen 11 and the second oil screen 12 are surface - attached. The guiding assembly 40 includes a second guiding member 44. The second guiding member 44 is fixedly connected to the second oil screen 12, and the first guiding member 43 is slidably connected to the side of the first oil screen 11, which can prevent a smoke leakage gap from being formed between the first oil screen 11 and the second oil screen 12, avoid oil fume from overflowing outward through the smoke leakage gap, ensure that most of the oil fume can enter the interior of the housing 20, and effectively improve the better oil fume extraction effect of the oil fume treatment device 100.

[0111] In an alternative embodiment, as Figures 16 - 19 shown, a second limiting member 112 is provided on the first oil screen 11. The second guiding member 44 cooperates with the second limiting member 112 to make the first oil screen holes 111 and the corresponding second oil screen holes 121 completely aligned. By providing the second limiting member 112, it can be ensured that the first oil screen holes 111 and the corresponding second oil screen holes 121 are completely aligned, and avoid excessive or insufficient adjustment of the relative position between the first oil screen 11 and the second oil screen 12.

[0112] In an alternative embodiment, as Figures 20 - 23 shown, the first oil screen 11 and the second oil screen 12 are surface - attached. The guiding assembly 40 simultaneously includes a first guiding member 43 and a second guiding member 44. By simultaneously providing the first guiding member 43 and the second guiding member 44, a more stable guiding effect for the relative movement between the first oil screen 11 and the second oil screen 12 can be achieved, and the mutual separation of the first oil screen 11 and the second oil screen 12 can be further avoided, ensuring that the first oil screen 11 and the second oil screen 12 are always in good close contact.

[0113] In an alternative embodiment, as Figure 21 and Figure 23 shown, first guiding members 43 are provided on both sides of the first oil screen 11 along its width direction, so as to further improve the effect of the first oil screen 11 and the second oil screen 12 always being in good close contact.

[0114] In an alternative embodiment, as Figure 21 and Figure 23As shown, second oil screens 12 are provided with second guiding members 44 on both sides in its width direction, thereby further improving the effect that the first oil screen 11 and the second oil screen 12 are always in good close fit.

[0115] In an alternative embodiment, as Figure 21 and Figure 23 shown, the first guiding member 43 and the second guiding member 44 are arranged on the same side of the first oil screen 11. The first guiding member 43 and the second guiding member 44 cooperate to make the first oil screen holes 111 and the corresponding second oil screen holes 121 exactly opposite. While ensuring better guiding, there is no need to additionally provide a limiting structure, making the overall structure of the telescopic oil screen 10 simple, compact and small in size.

[0116] Embodiment Three

[0117] This embodiment discloses an oil fume treatment device 100. The structure of the oil fume treatment device 100 is basically the same as that of the oil fume treatment device 100 in Embodiment Two. The main difference between the two is that as Figure 24 shown, the guiding assembly 40 includes a slider 41 and a guide rail 42. One of the slider 41 and the guide rail 42 is arranged on the first oil screen 11, and the other of the two is arranged on the second oil screen 12. The guide rail 42 extends along the first direction. The slider 41 is arranged on the guide rail 42 and can slide along the guide rail 42. The cooperation between the slider 41 and the guide rail 42 can achieve a better guiding effect on the relative movement of the first oil screen 11 and the second oil screen 12.

[0118] Embodiment Four

[0119] As Figures 1 - 6As shown in the figure, the fume treatment device 100 includes a housing 20, a flap mechanism 30, and a telescopic oil screen 10. Among them, the flap mechanism 30 can flip relative to the housing 20. The telescopic oil screen 10 is provided with oil screen holes. One end of the telescopic oil screen 10 is movably connected to the housing 20, and the other end of the telescopic oil screen 10 is movably connected to the flap mechanism 30. The actual air intake area of the oil screen holes increases with the increase of the opening angle of the flap mechanism 30, and the posture of the telescopic oil screen 10 is adaptively adjusted according to the opening state of the flap mechanism 30. As the amount of fume increases, the opening angle of the flap mechanism 30 increases, which can achieve a better gathering and absorption effect for a larger amount of fume. The actual air intake area of the oil screen holes also increases accordingly. The overall telescopic oil screen 10 moves downward. The larger air intake area and the lower oil screen holes can suck and discharge a larger amount of fume with a higher suction and discharge efficiency, achieving a better suction and discharge effect for fume. When the amount of fume is small, the opening angle of the flap mechanism 30 is small. The flap mechanism 30 can achieve a sufficient gathering and absorption effect for a smaller amount of fume. Moreover, the actual air intake area of the oil screen holes is relatively small. The smaller air intake area can meet the suction and discharge effect of a smaller amount of fume, and can also avoid the main chassis from running at a high load for a long time, effectively reducing the energy consumption of the fume treatment device 100.

[0120] In summary, through the fume treatment device 100 of the present disclosure embodiment, it is possible to achieve a dynamic balance between the suction and discharge effect of fume and the relatively low energy consumption of the fume treatment device 100. For different fume conditions, it can ensure that the fume treatment device 100 reaches a relatively good performance.

[0121] In an alternative embodiment, as Figures 3 - 5 shown, the telescopic oil screen 10 of the present disclosure embodiment includes a first oil screen 11 and a second oil screen 12. The first oil screen 11 is rotatably connected to the housing 20. The first oil screen 11 is provided with first oil screen holes 111. The second oil screen 12 is slidably connected to the first oil screen 11 and rotatably connected to the flap mechanism 30. The second oil screen 12 is provided with second oil screen holes 121. The flap mechanism 30 can be switched between a fully open position and a closed position. As Figure 5 and Figure 6 shown, when the flap mechanism 30 is in the fully open position, the telescopic oil screen 10 is in an extended state, and the first oil screen holes 111 are completely aligned with the second oil screen holes 121. As Figure 3 and Figure 4 shown, when the flap mechanism 30 is in the closed position, the telescopic oil screen 10 is in a contracted state, and the first oil screen holes 111 are staggered from the second oil screen holes 121. Through the above simple structure and the simple relative movement between the first oil screen 11 and the second oil screen 12, it is possible to achieve that the actual air intake area of the oil screen holes increases with the increase of the opening angle of the flap mechanism 30, and it is possible to achieve a rapid and accurate adjustment of the actual air intake area.

[0122] In an alternative embodiment, as Figure 25 and Figure 26 shown, when the flap mechanism 30 is in the fully open position, the projection of the second oil screen hole 121 on the first oil screen 11 is completely located in the first oil screen hole 111; when the second oil screen 12 moves relative to the first oil screen 11 in the first direction, the flap mechanism 30 switches from the fully open position to the closed position. During this process, the air resistance of the channel formed by the first oil screen hole 111 and the second oil screen hole 121 remains unchanged, which can avoid the problems of excessive energy consumption and too small displacement caused by the excessive air resistance of the oil fume treatment device 100, thereby further promoting the oil fume suction and exhaust effect and the dynamic balance of relatively low energy consumption of the oil fume treatment device 100. For different oil fume conditions, the oil fume treatment device 100 can ensure relatively good performance.

[0123] In an alternative embodiment, as Figure 25 and Figure 26 shown, along the first direction, the dimension of the second oil screen hole 121 in the second direction gradually increases. Both the first direction and the second direction are coplanar with the second oil screen 12. Through the above setting of the structure of the second oil screen hole 121, it can be realized that when the second oil screen 12 moves relative to the first oil screen 11 in the first direction, during the process of the flap mechanism 30 switching from the fully open position to the closed position, the air resistance of the channel formed by the first oil screen hole 111 and the second oil screen hole 121 remains basically unchanged.

[0124] In an alternative embodiment, as Figure 25 and Figure 26 shown, the second oil screen hole 121 has two first outer contour curves 1211. The two first outer contour curves 1211 are arranged at intervals in the second direction. Along the first direction, the angle between the tangent of the first outer contour curve 1211 and the first direction first increases and then decreases. Through the above setting of the structure of the second oil screen hole 121, it can be realized that when the second oil screen 12 moves relative to the first oil screen 11 in the first direction, during the process of the flap mechanism 30 switching from the fully open position to the closed position, the air resistance of the channel formed by the first oil screen hole 111 and the second oil screen hole 121 remains basically unchanged.

[0125] Exemplarily, when the strong gear is preset, the first oil screen hole 111 and the second oil screen hole 121 are completely opposite to each other, belonging to the maximum air volume state, and the angle of the flap mechanism 30 is opened to the maximum. Let the air volume at this time be Q, and the first channel area S of the channel formed by the first oil screen hole 111 and the second oil screen hole 121. The first air resistance R of the channel in the above situation is approximately as follows:

[0126]

[0127] Among them,

[0128] After sorting out, we get:

[0129] In the above formula, λ represents the frictional resistance coefficient in the strong gear. This coefficient is used to draw the air volume and wind speed frictional resistance line graph of the oil fume treatment device 100 according to the air volume performance test. ρ represents the air density (Kg / m 3 ) in the strong gear, and η represents the compensation coefficient in the strong gear. This coefficient is measured through conversion based on the overall machine test of the specific model of the oil fume treatment device 100. At this time, the telescopic oil screen 10 extends to the longest length, and it extends by L more than the shortest length of the telescopic oil screen 10 max , where:

[0130]

[0131] In the above formula, as Figure 27 shown, the flap mechanism 30 is hinged to the housing 20 at the first hinge point T, the flap mechanism 30 is hinged to the telescopic oil screen 10 at the second hinge point E, and the telescopic oil screen 10 is hinged to the housing 20 at the third hinge point W. The distance between T and E is r; β is the angle between TW and TE when the channel is closed; β' is the angle between TW and EW when the channel is closed; γ0 is the angle between TE when the channel is closed and TE when the channel is fully open; γ' is the angle between EW when the channel is closed and EW when the channel is fully open.

[0132] As can be seen from the above, when the oil fume treatment device 100 is set to other gears and the air volume of the preset gear is α% of that of the strong gear, it is known that when keeping the air inlet speed of the channel unchanged, the area of the channel also needs to be α% of the channel area of the strong gear. At this time, the second wind resistance R ％ is:

[0133]

[0134] In the above formula, λ ％ represents the frictional resistance coefficient in the preset gear. This coefficient is used to draw the air volume and wind speed frictional resistance line graph of the oil fume treatment device 100 according to the air volume performance test, and η ％ represents the compensation coefficient in the preset gear. This coefficient is measured through conversion based on the overall machine test of the specific model of the oil fume treatment device 100.

[0135] As can be seen from the above, at this time, the second wind resistance R ％ is greater than the first wind resistance R. If the second wind resistance R ％ remains unchanged relative to the first wind resistance R, the second channel area S' is:

[0136] Formula 1:

[0137] At this time, the extension length of the telescopic oil screen 10 is L, and L satisfies the following relationship:

[0138] Formula 2:

[0139] Therefore, the setting of the channels should satisfy the above relational expression, that is, when the telescopic oil screen 10 extends by L', the area of the second channel is S'.

[0140] Equation 1 and Formula 2 are simplified to the following formula:

[0141]

[0142] Then, the function f(L) of the first outer contour curve 1211 satisfies the following formula:

[0143]

[0144] Then, the function f(L) of the first outer contour curve 1211 satisfies the following formula:

[0145]

[0146] In the example of the present disclosure embodiment, ρ = 1.205 Kg / m3, η = 1.5, η ％ = 1.25, λ is approximately λ ％ , β is taken as 7°, β' is taken as 3°, γ0 is taken as 20°, γ' is taken as 7°, the number N of the second oil screen holes 121 is taken as 10, r is taken as 0.1 m, then Equation 1 and Formula 2 are simplified to the following formula:

[0147]

[0148] Among them, 1 ≥ α ≥ 0, S is taken as 0.4 m 3 , then S' ≈ 0.376α2 / 3, and the area of a single second oil screen hole 121 is S' / N ≈ 0.0376α 2 / 3 .

[0149] Therefore,

[0150]

[0151] Then, the function f(L) of the first outer contour curve 1211 satisfies the following formula:

[0152]

[0153] Then, the function f(L) of the first outer contour curve 1211 satisfies the following formula:

[0154] f(L) = 0.0125 × α -1 / 3 ;

[0155]

[0156] Thus, a schematic diagram of the function f(L) of the first outer contour curve 1211 as shown in Figure 28 is obtained.

[0157] It should be noted that the specific solutions of Embodiment 1 to Embodiment 4 can be combined in permutations and combinations to form new solutions, and all the new solutions formed are within the protection scope of this application.

[0158] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A fume treatment device, characterized in that: include: Housing (20); A flap mechanism (30) capable of turning over relative to the housing (20); and A telescopic oil net (10) is provided with oil net holes, one end of the telescopic oil net (10) is movably connected to the housing (20), and the other end of the telescopic oil net (10) is movably connected to the flap mechanism (30), the actual air inlet area of ​​the oil net holes increases as the opening angle of the flap mechanism (30) increases, and the posture of the telescopic oil net (10) is adaptively adjusted according to the opening state of the flap mechanism (30).

2. The oil fume treatment device according to claim 1, characterized in that: The telescopic oil net (10) comprises: A first oil net (11) is rotatably connected to the housing (20), and a first oil net hole (111) is formed on the first oil net (11); and A second oil net (12) is slidably connected to the first oil net (11) and is rotatably connected to the flap mechanism (30), the second oil net (12) is provided with second oil net holes (121), and the flap mechanism (30) can be switched between a fully open position and a closed position; When the flap mechanism (30) is in the fully open position, the first oil mesh hole (111) and the second oil mesh hole (121) are completely opposite to each other; when the flap mechanism (30) is in the closed position, the first oil mesh hole (111) and the second oil mesh hole (121) are staggered.

3. The oil fume treatment device according to claim 2, characterized in that: When the flap mechanism (30) is in the fully open position, the projection of the second oil mesh hole (121) on the first oil mesh hole (11) is completely located in the first oil mesh hole (111); when the second oil mesh (12) moves along the first direction relative to the first oil mesh (11), the flap mechanism (30) switches from the fully open position to the closed position, and the wind resistance of the channel formed by the first oil mesh hole (111) and the second oil mesh hole (121) remains unchanged.

4. The oil fume treatment device according to claim 3, characterized in that: Along the first direction, the size of the second oil mesh hole (121) along the second direction gradually increases, and the first direction and the second direction are both coplanar with the second oil mesh (12).

5. The oil fume treatment device according to claim 4, characterized in that: The second oil mesh hole (121) has two first outer contour curves (1211), and the two first outer contour curves (1211) are arranged at intervals along the second direction. The flap mechanism (30) is hinged to the housing (20) at a first hinge point T, the flap mechanism (30) is hinged to the telescopic oil mesh (10) at a second hinge point E, and the telescopic oil mesh (10) is hinged to the housing (20) at a third hinge point W; The function f(L) of the first outer contour curve (1211) satisfies the following relationship: Wherein, L is the elongated length of the telescopic oil net (10); α% is the percentage of the air volume of the preset gear to the air volume of the oil fume treatment device working at the strong gear; λ represents the friction resistance coefficient at the strong gear; η represents the compensation coefficient at the strong gear; λ ％ Represents the friction coefficient at the preset gear position; η ％ Represents the compensation coefficient when the preset gear is in the preset position; r is the distance between TE; β is the angle between TW and TE when the channel is closed; β' is the angle between TW and EW when the channel is closed; γ0 is the angle between TE when the channel is closed and TE when the channel is fully open; γ' is the angle between EW when the channel is closed and EW when the channel is fully open.

6. The oil fume treatment device according to claim 2, characterized in that: The telescopic oil net (10) further comprises: A guide assembly (40) is arranged between the first oil net (11) and the second oil net (12), and the guide assembly (40) is configured to enable the first oil net (11) and the second oil net (12) to slide along a first direction.

7. The oil fume treatment device according to claim 6, characterized in that: The guide assembly (40) comprises a slider (41) and a guide rail (42), one of the slider (41) and the guide rail (42) being arranged on the first oil net (11), and the other of the slider (41) and the guide rail (42) being arranged on the second oil net (12), the guide rail (42) extending along the first direction, and the slider (41) being arranged on the guide rail (42) and being able to slide along the guide rail (42); and / or The first oil net (11) and the second oil net (12) are in contact with each other, and the guide assembly (40) comprises a first guide member (43) and / or a second guide member (44); the first guide member (43) is fixedly connected to the first oil net (11), and the first guide member (43) is slidably connected to the side of the second oil net (12); the second guide member (44) is fixedly connected to the second oil net (12), and the first guide member (43) is slidably connected to the side of the first oil net (11).

8. The oil fume treatment device according to claim 7, characterized in that: The second oil net (12) is provided with a first limiting member (122), and the first guiding member (43) cooperates with the first limiting member (122) so that the first oil net hole (111) and the second oil net hole (121) corresponding thereto are completely aligned; and / or A second limiting member (112) is provided on the first oil net (11), and the second guiding member (44) cooperates with the second limiting member (112) so that the first oil net hole (111) and the second oil net hole (121) corresponding thereto are completely aligned; and / or The first guide member (43) and the second guide member (44) are arranged on the same side of the first oil net (11), and the first guide member (43) and the second guide member (44) cooperate with each other so that the first oil net hole (111) and the second oil net hole (121) corresponding thereto are completely opposite to each other.

9. The oil fume treatment device according to claim 8, characterized in that: The oil fume treatment device also includes: a first elastic deformation member (50), wherein the first oil net (11) and the housing (20) are connected via the first elastic deformation member (50); and / or A second elastic deformation member (60), wherein the second oil net (12) and the flap mechanism (30) are connected via the second elastic deformation member (60).

10. The oil fume treatment device according to claim 9, characterized in that: The first elastic deformable member (50) is located below the second elastic deformable member (60); wherein the first elastic deformable member (50) has a first elastic member critical force F 临界1 , where F 临界1 Satisfies the following relationship: F 临界1 ≥F m -(G1+G2)*cosγ; In the formula, F m is the maximum static friction between the first oil net (11) and the second oil net (12); G1 is the weight of the first oil net (11); G2 is the weight of the second oil net (12); γ is the angle between the extension direction of the flap mechanism (30) and the vertical direction when the flap mechanism (30) is in the fully open position; and / or The first elastic deformable member (50) is located below the second elastic deformable member (60); wherein the second elastic deformable member (60) has a second elastic member critical force F 临界2 , where F 临界2 Satisfies the following relationship: F 临界2 ≥F m +(G1+G2)*cosγ; In the formula, F m is the maximum static friction between the first oil net (11) and the second oil net (12); G1 is the weight of the first oil net (11); G2 is the weight of the second oil net (12); γ is the angle between the extension direction of the telescopic oil net (10) and the vertical direction when the flap mechanism (30) is in the fully open position.

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