Oil smoke suction equipment

Abstract

The invention discloses oil fume suction equipment, belongs to the technical field of kitchen appliances, and is designed for solving the problems that a connecting rod of the existing oil fume suction equipment is easy to collide with a surrounding structure and the like. The cooking fume suction equipment comprises a connecting rod, a fume collecting hood and a turning plate assembly, one end of the connecting rod is connected to the turning plate assembly, the other end of the connecting rod is movably connected to the inner wall face of the fume collecting hood, and a mounting through hole allowing the connecting rod to penetrate is formed in the fume collecting hood; when the turning plate assembly is in an open state and a closed state and is switched between the open state and the closed state, the distance between the connecting rod and the edge of the mounting through hole and the distance between the connecting rod and the top face of the exhaust fume collecting hood are always larger than a set value in the moving process. According to the cooking fume suction equipment, gaps are always reserved between the connecting rod and the edge of the mounting through hole and between the connecting rod and the top surface of the exhaust fume collecting hood in the moving process, the turning plate assembly is opened and closed more smoothly, the inner top surface of the exhaust fume collecting hood and the mounting through hole are prevented from being extruded and deformed by the connecting rod, the use experience is better, and miniaturization of the overall structure is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of kitchen appliances, and in particular to range fumes extraction equipment. Background Art

[0002] Oil fume extraction equipment is a commonly used household appliance that can use a fan to generate negative pressure in the box. The oil fume generated by cooking can enter the box through the smoke collecting chamber under the action of negative pressure, and then be discharged to the outside or filtered centrally. In order to achieve both aesthetics and practicality, a flap is usually set on the box. When oil fume extraction is needed, the flap is opened to increase the smoke collection area and extract the oil fume more thoroughly; after the oil fume extraction is completed, the flap is closed to completely cover the smoke collecting chamber, making the appearance of the oil fume extraction equipment more beautiful.

[0003] In order to open and close the flap, the flap is usually hinged to the box body using a connecting rod. The flap can swing around the hinge point synchronously with the connecting rod to switch between the open state and the closed state. One end of the existing connecting rod is connected to the back of the flap, and the other end of the connecting rod is hinged to the inner wall of the box body. When the flap is closed, the connecting rod can be completely covered, and the appearance of the range fumes extraction device is more beautiful.

[0004] The size of existing range fumes extraction equipment is getting smaller and smaller, and the space left for the connecting rod to move is also reduced accordingly, so the connecting rod is easy to hit the surrounding structure; in order to avoid the collision of the connecting rod with the surrounding structure when the switch flips, it is necessary to increase the size of the range fumes extraction equipment, which will take up more kitchen space and result in poor product competitiveness. Summary of the invention

[0005] The purpose of the present invention is to provide a range fumes suction device, which solves the problem that the connecting rod of the existing range fumes suction device is prone to collide with the surrounding structure, and is conducive to the miniaturization of the overall structure.

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

[0007] A range fumes extraction device comprises a connecting rod, a smoke hood and a flap assembly, wherein one end of the connecting rod is connected to the flap assembly, and the other end of the connecting rod is movably connected to the inner wall surface of the smoke hood. The smoke hood is provided with a mounting through hole for passing the connecting rod. When the flap assembly is in an open state, a closed state, and switching between the open state and the closed state, the distance between the connecting rod and the edge of the mounting through hole and the top surface of the smoke hood during movement is always greater than a set value.

[0008] In one of the preferred embodiments, the connecting rod includes an inner concave curve, an end curve and an outer convex curve connected in sequence, and the inner concave curve and / or the outer convex curve are respectively connected by at least two curves of different radii, and there is a smooth transition between two adjacent curves; during the movement of the connecting rod, the distance between the inner concave curve and the edge of the mounting through hole is always greater than a set value, and the distance between the outer convex curve and the edge of the mounting through hole and the top surface of the smoke hood is always greater than a set value.

[0009] In one of the preferred embodiments, the concave curve includes a transition concave sub-curve N1, a hood end connecting concave sub-curve, an avoidance concave sub-curve N4 and a plate end connecting concave sub-curve connected in sequence from the end of the end curve, and the radius RN4 of the avoidance concave sub-curve N4 is smaller than the radius of all other concave sub-curves.

[0010] In one of the preferred embodiments, the plate end connecting sub-curve also includes a fifth concave sub-curve N5, a sixth concave sub-curve N6 and a seventh concave sub-curve N7 which are sequentially connected from the end of the avoidance concave sub-curve N4 in a direction away from the end curve, and the radii of the fifth concave sub-curve N5, the sixth concave sub-curve N6 and the seventh concave sub-curve N7 gradually increase.

[0011] In one preferred embodiment, a line connecting the dot of the transition concave sub-curve N1 and the dot O of the end curve forms a straight line Q, and a distance between the transition concave sub-curve N1 and the straight line Q is H, 5mm≤H≤8mm.

[0012] In one preferred embodiment, the distance between the avoidance concave sub-curve N4 and the nearest limit point is X, 4mm≤X≤6mm.

[0013] In one of the preferred embodiments, the convex curve includes a transition convex sub-curve W1, a hood-end connecting convex sub-curve, an avoidance convex sub-curve W4 and a plate-end connecting convex sub-curve connected in sequence from the end of the end curve, and the radius RW4 of the avoidance convex sub-curve W4 is greater than the radius of all other convex sub-curves.

[0014] In one of the preferred embodiments, the hood end connected external convex sub-curve includes an external convex sub-curve reinforcement section W3 connected to the end of the avoidance external convex sub-curve W4 and extending toward the end curve, and the distance between the external convex sub-curve reinforcement section W3 and the nearest limit point is Z, 3mm≤Z≤5mm.

[0015] In one preferred embodiment, the distance between the inner concave curve and the outer convex curve is Y, 10mm≤Y≤15mm.

[0016] In one of the preferred embodiments, the range fumes extraction device further comprises a cover plate, wherein the cover plate is connected to the connecting rod, and when the flap assembly is in the open state, the cover plate blocks the mounting through hole; when the flap assembly is in the closed state, the distance between the cover plate and the top surface of the fume hood is greater than a set value.

[0017] In one of the preferred embodiments, the cover plate includes a cover plate body, which is movably connected to the connecting rod; when the flap assembly is in the closed state, the cover plate body can abut against the top surface of the smoke hood and swing in the opposite direction to make the minimum distance between the cover plate body and the top surface of the smoke hood greater than a set value; or, the cover plate includes a cover plate body, which is fixedly connected to the connecting rod; when the flap assembly is in the closed state, the minimum distance between the cover plate body and the top surface of the smoke hood is greater than a set value.

[0018] In one of the preferred embodiments, when the cover plate body is hinged to the connecting rod, two suspension arms are relatively arranged on the cover plate body, suspension through holes are opened on the suspension arms, and at least a second suspension member is arranged on the connecting rod, and one of the suspension through holes is sleeved on the second suspension member.

[0019] In one of the preferred embodiments, a first limiting member is provided on the cover plate body, a second limiting member is provided on the connecting rod, and the first limiting member is located between the second limiting member and the mounting through hole; when the flap assembly is opened, the second limiting member abuts against the first limiting member to press the cover plate onto the mounting through hole.

[0020] In one of the preferred embodiments, the range fumes extraction device further comprises a cover plate, which is connected to the connecting rod and is made of a flexible material having elastic deformation capability, and when the flap assembly is in the open state, the cover plate blocks the mounting through hole; when the flap assembly is in the closed state, the cover plate undergoes elastic deformation to prevent the cover plate from squeezing the top surface of the smoke hood and causing deformation of the smoke hood.

[0021] The range fumes extraction device disclosed in the present invention leaves a gap between the edge of the mounting through hole and the top surface of the smoke hood during the movement of the connecting rod when the flap assembly is in an open state, a closed state, and switching between the open state and the closed state. The flap assembly can be opened and closed more smoothly, and the internal top surface of the smoke hood and the mounting through hole are prevented from being squeezed and deformed by the connecting rod, thereby extending the service life of the smoke hood, providing a better user experience, and facilitating the miniaturization of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a range fumes suction device provided in a specific embodiment of the present invention;

[0023] Figure 2 is a cross-sectional view of the oil fume suction device when the flap assembly provided by the specific embodiment of the present invention is opened;

[0024] Figure 3 is a cross-sectional view of the oil fume suction device when the flap assembly provided by the specific embodiment of the present invention is closed;

[0025] Figure 4 It is one of the combined structural diagrams of the flap assembly, the connecting rod and the driving device provided in the specific embodiment of the present invention;

[0026] Figure 5 This is the second schematic diagram of the combined structure of the flap assembly, the connecting rod and the driving device provided in the specific embodiment of the present invention;

[0027] Figure 6 It is a schematic diagram of the combined structure of the flap assembly, connecting rod, driving device, smoke hood, cover plate and wiring part provided by a specific embodiment of the present invention;

[0028] Figure 7 It is a schematic diagram of the combined structure of the flap assembly, the connecting rod, the cover plate and the wiring part provided in a specific embodiment of the present invention;

[0029] Figure 8 is a schematic diagram of the combined structure of a connecting rod and a hinge assembly provided in a specific embodiment of the present invention;

[0030] Fig. 9 is a top view of the combined structure of the connecting rod and the hinge assembly provided in a specific embodiment of the present invention;

[0031] Fig.10 It is a front view of the combined structure of the connecting rod and the hinge assembly provided in a specific embodiment of the present invention;

[0032] Fig.11 is a side view of the combined structure of the connecting rod and the hinge assembly provided in a specific embodiment of the present invention;

[0033] Fig.12 It is a structural schematic diagram of a pin shaft provided in a specific embodiment of the present invention;

[0034] Fig.13 is a schematic diagram of the position of the connecting rod when the flap assembly provided by a specific embodiment of the present invention is opened;

[0035] Fig.14 It is a schematic diagram of the relative position relationship between the connecting rod and the front limit point when the flap assembly provided by the specific embodiment of the present invention is opened;

[0036] Fig.15 It is a schematic diagram of the relative position relationship between the connecting rod and the front limit point and the rear limit point respectively when the flap assembly provided by the specific embodiment of the present invention is half-opened and half-closed;

[0037] Fig.16 It is a schematic diagram of the relative position relationship between the connecting rod and the top limit point when the flap assembly provided by the specific embodiment of the present invention is closed;

[0038] Fig.17 It is one of the structural schematic diagrams of the connecting rod provided in the specific embodiment of the present invention;

[0039] Fig.18 This is the second structural schematic diagram of the connecting rod provided in the specific embodiment of the present invention;

[0040] Fig.19 This is the third structural schematic diagram of the connecting rod provided in the specific embodiment of the present invention;

[0041] Fig. 20 This is the fourth structural schematic diagram of the connecting rod provided in the specific embodiment of the present invention;

[0042] Fig.21 It is a structural schematic diagram of a mounting through hole provided in a specific embodiment of the present invention;

[0043] Fig. 22 It is a structural schematic diagram of a range fumes extraction device when a cover plate blocks the installation through hole provided by a specific embodiment of the present invention;

[0044] Fig.23 yes Fig. 22 A partial enlarged view of the middle A;

[0045] Fig.24 is a partial cross-sectional view of the range fumes extraction device when the flap assembly provided by the specific embodiment of the present invention is opened;

[0046] Fig.25 yes Fig.24 A partial enlarged view of point B in the middle;

[0047] Fig.26 It is a partial enlarged view of the range fumes suction device when the flap assembly provided by the specific embodiment of the present invention is half-opened and half-closed;

[0048] Fig. 27 It is a partial enlarged view of the range fumes suction device when the flap assembly provided by the specific embodiment of the present invention is closed;

[0049] Fig.28 is a structural schematic diagram of a cover plate provided in a specific embodiment of the present invention;

[0050] Fig.29 This is one of the schematic diagrams of the combined structure of the flap assembly, the wiring portion and the connecting rod provided in the specific embodiment of the present invention;

[0051] Fig.30It is a schematic diagram of the combined structure of the wiring part + the cover plate provided in a specific embodiment of the present invention;

[0052] Fig.31 This is the second schematic diagram of the combined structure of the flap assembly, the wiring portion and the connecting rod provided in the specific embodiment of the present invention;

[0053] Fig.32 hour Fig.31 A partial enlarged view of point C in the middle;

[0054] Fig.33 It is one of the exploded views of the connecting rod, the wiring portion and the mounting portion provided in the specific embodiment of the present invention;

[0055] Fig.34 This is the second exploded view of the connecting rod, wiring portion and mounting portion provided in the specific implementation manner of the present invention.

[0056] In the figure:

[0057] 1. Inner concave curve; 2. Outer convex curve; 3. End curve; 4. Connecting rod fixing seat; 100. Connecting rod; 101. Fixed end; 102. Connecting rod hinge hole; 103. Second hanging member; 200. Housing; 300. Smoke hood; 301. Mounting hole; 302. Top limit point; 303. Rear limit point; 304. Front limit point; 305. Flanging; 400. Flap assembly; 500. Cover Plate; 501, cover body; 502, suspension arm; 503, suspension through hole; 504, first limit piece; 601, wiring part; 602, installation part; 603, wire passing port; 604, buckle; 605, first suspension part; 606, second limit piece; 700, line; 800, drive device; 900, hinge assembly; 901, hinge seat; 902, pin shaft; 903, anti-slip zone. DETAILED DESCRIPTION

[0058] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0059] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0060] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0061] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0063] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0064] This embodiment discloses a fume extraction device, wherein the connecting rod can stably support the flap, so that the fume collection range is more stable during fume extraction, and the fume extraction effect is good. The fume extraction device can be, but is not limited to, a top-suction range hood, a side-suction range hood, a range hood in an integrated stove, and other devices with fume collection and processing functions.

[0065] like Figures 1 to 7 As shown, the range fumes extraction device comprises a connecting rod 100, a housing 200, a fume hood 300, a flap assembly 400 and a driving device 800. One end (fixed end 101) of the connecting rod 100 is connected to the flap assembly 400, and the other end (hinged end) of the connecting rod 100 is movably connected to the inner wall surface of the fume hood 300 through a hinge assembly 900. The fume hood 300 is provided with a mounting through hole 301 (such as Fig.21 As shown in the figure, the connecting rod 100 connects the flap assembly 400 and the smoke hood 300. In order to prevent the oil stains in the smoke hood 300 from flowing out through the installation through hole 301, the edge of the installation through hole 301 is bent toward the inside of the smoke hood 300 to form a flange 305. When the oil stains in the smoke hood 300 flow to the vicinity of the installation through hole 301, they will be blocked by the flange 305 and change the flow direction, and will not seep out from the installation through hole 301. The other structures of the oil fume extraction equipment are the same as those in the prior art and will not be repeated here.

[0066] When the flap assembly 400 is in an open state, a closed state, and switches between an open state and a closed state, the distance between the connecting rod 100 and the edge of the mounting through hole 301 and the top surface of the smoke hood 300 during the movement is always greater than the set value, so as to prevent the smoke hood 300 from being squeezed and deformed by the connecting rod 100, and extend the service life of the connecting rod 100 and the smoke hood 300; the flap assembly 400 switches more smoothly, and the user experience is better. It is understandable that the specific value of the "set value" is not limited, and can be set according to the hardness of the smoke hood 300, the shape and structure of the smoke hood 300, the processing accuracy of the connecting rod 100 and the smoke hood 300, etc., as long as it can ensure that the smoke hood 300 is not squeezed and deformed by the connecting rod 100. For example, the set value is 0.05mm, 0.1mm, 0.2mm, 0.5mm, 1mm and 2mm, and less than 0.05mm and greater than 2mm are also feasible.

[0067] The driving device 800 may be, but is not limited to, a hydraulic push rod, which can drive the flap assembly 400 to open and close the smoke collecting opening on the smoke collecting hood 300. When the flap assembly 400 is opened, it can collect smoke and absorb the oil smoke more thoroughly; when the flap assembly 400 is closed, it saves space and makes the appearance of the whole machine more beautiful.

[0068] The specific connection structure of the flap assembly 400 is not limited, as long as the connection with the smoke collecting hood 300 is stable and does not affect the opening and closing of the smoke collecting port. In this embodiment, the flap assembly 400 is fixedly connected to the connecting rod 100, and the flap assembly 400 is hinged to the driving device 800. The flap assembly 400 can be removed by disassembling the connecting piece between the flap assembly 400 and the connecting rod 100 and the connecting piece between the flap assembly 400 and the driving device 800, and the maintenance can be carried out without moving the entire range fumes extraction device, which is more convenient to use.

[0069] The installation method of the driving device 800 is not limited, as long as it can drive the flap assembly 400 to open and close the smoke collecting port. In this embodiment, one end of the driving device 800 is connected to the flap assembly 400, and the other end is connected to the smoke collecting hood 300. The driving device 800 can be removed by removing the connecting pieces at both ends, which is convenient for repair, maintenance and replacement.

[0070] “During the movement, the distance between the connecting rod 100 and the edge of the mounting hole 301 and the top surface of the smoke hood 300 is always greater than the set value” mainly includes two meanings. The first meaning is that the distance between the connecting rod 100 itself and the edge of the mounting hole 301 and the top surface of the smoke hood 300 is always greater than the set value. The second meaning is that the distance between the object connected to the connecting rod 100 and the edge of the mounting hole 301 and the top surface of the smoke hood 300 is always greater than the set value. The following will explain these two situations respectively.

[0071] like Figures 8 to 11 As shown, the connecting rod 100 includes an inner concave curve 1, an outer convex curve 2 and an end curve 3, the end curve 3 is connected between the inner concave curve 1 and the outer convex curve 2, and the free ends of the inner concave curve 1 and the outer convex curve 2 are respectively connected to the connecting rod fixing seat 4. The inner concave curve 1, the outer convex curve 2 and the end curve 3 form a C-shaped structure, so that the connecting rod 100 avoids surrounding objects when moving, that is, the distance between the 100 itself and the edge of the mounting through hole 301 and the top surface of the smoke hood 300 is greater than the set value.

[0072] In the range fumes extraction device, the "surrounding objects" mainly include a top limit point 302 located on the top surface of the smoke hood 300, a rear limit point 303 located on the mounting hole 301 and behind the connecting rod 100, and a front limit point 304 located on the mounting hole 301 and in front of the connecting rod 100. During the opening and closing of the flap assembly 400, the connecting rod 100 is most likely to collide with the above three limit points.

[0073] The hinge assembly 900 includes a hinge seat 901 and a pin shaft 902. The connecting rod 100 is provided with a connecting rod hinge through hole 102 (such as Fig. 20 After the pin 902 is inserted into the connecting rod hinge through hole 102, the pin 902 is riveted to the hinge seat 901, and the connecting rod 100 can swing around the pin 902, or the connecting rod 100 and the pin 902 can swing around the axis of the pin 902 together.

[0074] The middle part of the pin 902 is knurled to form an anti-slip zone 903 (such as Fig.12 As shown), the outer peripheral surface of the anti-slip zone 903 is connected to the connecting rod hinge hole 102 (as shown Fig. 20 The friction between the walls of the connecting rod 100 and the connecting rod 101 is relatively large, which can prevent the pin 902 and the connecting rod 100 from separating, and the overall connection structure is more stable.

[0075] During the swinging of the C-shaped connecting rod 100 around the axis of the pin shaft 902, it can avoid hitting the top limit point 302, the rear limit point 303 and the front limit point 304. The connecting rod 100 can swing more smoothly and stably, avoiding the top surface of the smoke hood 300 and the edge of the mounting hole 301 from being compressed and deformed, thereby improving the stability of the flap assembly 400 switch; the C-shaped structure improves the strength of the connecting rod 100, can provide support for the heavier flap assembly 400, and has a wider range of applications.

[0076] On the basis of the above structure, the inner concave curve 1 and / or the outer convex curve 2 are respectively connected by at least two curves of different radii, and the transition between the two adjacent curves is smooth. The bending directions of the inner concave curve 1 and the outer convex curve 2 are consistent, forming an approximately C-shaped structure. The radius and center point of each curve can be specifically designed according to the shape of the internal space of the range fumes extraction device, so as to fully utilize the space inside the range fumes extraction device to allow the connecting rod 100 to move, which is conducive to the miniaturization of the range fumes extraction device and reduces the occupied kitchen space.

[0077] Specifically, during the movement of the connecting rod 100, the concave curve 1 does not make hard contact with the edge of the mounting hole 301 (mainly the front limit point 304), and the convex curve 2 does not make hard contact with the edge of the mounting hole 301 (mainly the rear limit point 303) and the top limit point 302 of the top surface of the smoke hood 300.

[0078] On the premise of avoiding the components inside the range fumes extraction device, the distance between the inner concave curve 1 and the outer convex curve 2 can be appropriately enlarged to increase the strength of the connecting rod 100, thereby preventing the connecting rod 100 from being deformed or even damaged under the gravity of the flap assembly 400, thereby extending the service life of the entire machine and enabling the range fumes extraction device to operate stably for a long time.

[0079] like Figures 13 to 17As shown, the concave curve 1 includes a transition concave sub-curve N1, a hood end connecting concave sub-curve, an avoidance concave sub-curve N4 and a plate end connecting concave sub-curve connected in sequence from the end of the end curve 3, and the radius RN4 of the avoidance concave sub-curve N4 is smaller than the radius of all other concave sub-curves. The avoidance concave sub-curve N4 is approximately located in the middle of the concave curve 1. When the connecting rod 100 swings, as long as the distance between the avoidance concave sub-curve N4 and the front limit point 304 is always greater than the set value, the distance between other positions on the concave curve 1 and the front limit point 304 will always be greater than the set value, ensuring that the connecting rod 100 moves more smoothly and the smoke hood 300 will not be squeezed and deformed by the connecting rod 100, meeting the complex motion trajectory requirements.

[0080] In this embodiment, the concave curve 1 is composed of seven curve segments connected in sequence. The transition concave sub-curve N1 is the first segment, the avoidance concave sub-curve N4 is the fourth segment, and the hood end connecting concave sub-curve includes the second concave sub-curve N2 and the third concave sub-curve N3. By setting two curve segments with different radii, the transition between the transition concave sub-curve N1 and the avoidance concave sub-curve N4 is smoother, which plays a role in correcting the concave curve 1, and can avoid hitting the front limit point 304 while having good strength.

[0081] The specific values ​​of the point positions and radii of all seven curves are not limited and can be specifically designed according to the shape and size of the fume hood 300 of the range fumes extraction equipment and the shape and size of the mounting through hole 301 to ensure that no collision occurs when the connecting rod 100 swings.

[0082] like Fig.14 As shown, the distance between the avoidance concave sub-curve N4 and the front limit point 304 is X, 4mm≤X≤6mm. In this embodiment, X is 4mm, 4.5mm, 5mm, 5.5mm and 6mm. Sufficient space is left for poor processing accuracy and deformation of parts, thereby improving the yield rate.

[0083] The radius of the transition inward concave sub-curve N1 is significantly larger than the radius of the avoidance inward concave sub-curve N4, which can avoid the processing stress from being concentrated on the transition inward concave sub-curve N1 and improve the overall strength of the connecting rod 100; the transition inward concave sub-curve N1 is adjacent to the end curve 3 and is close to the swing center O of the connecting rod 100, so there is no chance of hitting the front limit point 304, and it is more suitable to widen the connecting rod 100 at this point to improve the strength of the connecting rod 100.

[0084] On the basis of the above structure, the board end connecting sub-curve further includes a fifth concave sub-curve N5, a sixth concave sub-curve N6 and a seventh concave sub-curve N7 which are sequentially connected from the end of the avoidance concave sub-curve N4 toward the direction away from the end curve 3. The radii of the avoidance concave sub-curve N4, the fifth concave sub-curve N5, the sixth concave sub-curve N6 and the seventh concave sub-curve N7 gradually increase, and the curve composed of the four curve segments is approximately involute-shaped.

[0085] The fifth inward concave sub-curve N5, the sixth inward concave sub-curve N6 and the seventh inward concave sub-curve N7 are far away from the swing center O of the connecting rod 100. During the swinging process of the connecting rod 100, the fifth inward concave sub-curve N5, the sixth inward concave sub-curve N6 and the seventh inward concave sub-curve N7 are always far away from the front limit point 304 and will not collide with each other. Therefore, when designing the center and radius of the fifth inward concave sub-curve N5, the sixth inward concave sub-curve N6 and the seventh inward concave sub-curve N7, more consideration is given to the strength and processing difficulty of the connecting rod 100 to ensure that the curve segments constituting the inward concave curve 1 are smoothly connected.

[0086] like Fig.18 As shown, the line connecting the dot of the transition concave sub-curve N1 and the dot O of the end curve 3 forms a straight line Q, and the distance between the transition concave sub-curve N1 and the straight line Q is H, 5mm≤H≤8mm. In this embodiment, H is 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm and 8mm. The transition concave sub-curve N1 can work more smoothly with other component curve segments in the concave curve 1, and has good stability and reliability.

[0087] The design of the concave curve 1 ensures that the connecting rod 100 can pass through the complex spatial environment inside the smoke hood 300, and can cleverly avoid various parts inside the smoke hood 300, so as to prevent the connecting rod 100 from having hard contact with surrounding objects and prevent the smoke hood 300 from being squeezed and deformed, thereby making it safer to use; there is no need to reserve a large space for the connecting rod 100 inside the smoke hood 300, thereby improving the compactness and rationality of the internal structure of the smoke hood 300.

[0088] Based on the above structure, Fig.19 As shown, the convex curve 2 includes a transition convex sub-curve W1, a cover end connecting convex sub-curve, an avoidance convex sub-curve W4 and a plate end connecting convex sub-curve which are sequentially connected from the end of the end curve 3, and the radius RW4 of the avoidance convex sub-curve W4 is greater than the radius of all other convex sub-curves. Among them, the avoidance convex sub-curve W4 is approximately located at the middle of the convex curve 2 near the end of the flap assembly 400. As long as the avoidance convex sub-curve W4 does not hit the top limit point 302 and the rear limit point 303, the other curve segments on the convex curve 2 will not hit the top limit point 302 and the rear limit point 303.

[0089] In this embodiment, the convex curve 2 includes six segments of radius and curve segments with different centers connected in sequence. Specifically, the transition convex sub-curve W1 is smoothly connected with the end curve 3, and together with the end curve 3, it shapes the outer contour of the connecting rod 100; the hood end connecting convex sub-curve includes the second convex sub-curve W2 and the convex sub-curve reinforcement segment W3 connected in sequence, wherein the second convex sub-curve W2 is connected with the transition convex sub-curve W1, so that the shape of the connecting rod 100 is more in line with the movement requirements, and the convex sub-curve reinforcement segment W3 is connected between the second convex sub-curve W2 and the avoidance convex sub-curve W4, playing a connecting role; the radius RW4 of the avoidance convex sub-curve W4 can be as large as possible, which can better avoid the top limit point 302 and the rear limit point 303 to avoid collision; the fifth convex sub-curve W5 and the sixth convex sub-curve W6 are connected in sequence, which improves the outer contour of the connecting rod 100, so that the connecting rod 100 can meet the complex movement trajectory requirements. It can be understood that, in order to facilitate processing, the outer convex avoidance sub-curve W4 can be designed as a straight line segment, and the straight line segment can be understood as a curve with a radius of ∞.

[0090] The specific values ​​of the point positions and radii of all six curve segments are not limited and can be specifically designed according to the shape and size of the fume hood 300 of the range fumes extraction device and the shape and size of the mounting through hole 301 to ensure that no collision occurs when the connecting rod 100 swings.

[0091] like Fig.16 As shown, when the flap assembly 400 completely closes the smoke collecting port on the smoke collecting hood 300, the distance between the outer convex sub-curve reinforcement section W3 and the nearest limit point is Z, 3mm≤Z≤5mm. In this embodiment, Z is 3mm, 3.5mm, 4mm, 4.5mm and 5mm. A large enough space is reserved for poor processing accuracy and deformation of the device after a period of use, thereby extending the service life of the connecting rod 100.

[0092] like Fig. 20 As shown, the distance between the inner concave curve 1 and the outer convex curve 2 is Y, 10mm≤Y≤15mm. In this embodiment, Y is 10mm, 11mm, 12mm, 13mm, 14mm and 15mm, ensuring that the connecting rod 100 does not collide with surrounding objects during movement, and at the same time has good strength to prevent the connecting rod 100 from deformation or even damage.

[0093] In order to facilitate the installation of the connecting rod 100, Fig.21 As shown, the smoke collecting hood 300 is provided with a mounting through hole 301 for inserting the connecting rod 100. When the flap assembly 400 is opened, a person's finger can easily be inserted into the mounting through hole 301, causing the person's finger to be pinched and injured, which poses a safety hazard.

[0094] To solve this problem, Figure 21 to Figure 27As shown, the range fumes extraction device further includes a cover plate 500, which is directly or indirectly connected to the connecting rod 100. In this embodiment, the distance between the cover plate 500 and the edge of the installation through hole 301 and the top surface of the smoke hood 300 is also required to be greater than a set value. Specifically, the cover plate 500 can move synchronously with the connecting rod 100. When the flap assembly 400 is opened, the cover plate 500 blocks the installation through hole 301, preventing people's fingers from being inserted into the installation through hole 301, avoiding people's fingers from being pinched, and making it safer to use; when the flap assembly 400 is in a closed state, the cover plate 500 is located inside the smoke hood 300 and the distance between the cover plate 500 and the top surface of the smoke hood 300 is greater than a set value.

[0095] The specific structure of the cover plate 500 is not limited, as long as it can move with the connecting rod 100 and can cover the installation through hole 301. Figures 28 to 30 As shown, the cover plate 500 includes a cover plate body 501, on which two suspension arms 502 are arranged opposite to each other, and the suspension arms 502 are provided with suspension through holes 503. The cover plate 500 is directly or indirectly connected to the connecting rod 100 through the suspension arms 502 and the suspension through holes 503, and the connection structure is simple and reasonable, and is easy to disassemble and assemble.

[0096] When the flap assembly 400 is turned over, the connecting rod 100 will swing synchronously, and the cover plate 500 will move synchronously with the connecting rod 100, ensuring that when the flap assembly 400 is opened, the cover plate 500 blocks the installation through hole 301, preventing people's fingers from extending into the installation through hole 301. When the flap assembly 400 is closed, the cover plate 500 moves toward the inner top surface of the smoke hood 300 with the connecting rod 100. When the cover plate 500 hits the inner top surface of the smoke hood 300, the cover plate 500 will swing in the opposite direction around the hanging through hole 503, avoiding a hard collision between the cover plate 500 and the inner top surface of the smoke hood 300, making it safer to use. The specific angle of the cover plate 500's reverse swing is not limited, and the spatial posture of the cover plate 500 after the reverse swing is mostly inclined, which can make the minimum distance between the cover plate body 501 and the top surface of the smoke hood 300 (i.e., the distance between the highest point on the cover plate body 501 and the top surface of the smoke hood 300) greater than the set value.

[0097] The cover body 501 can also be fixedly connected to the connecting rod 100, and when the flap assembly 400 is in a closed state, the minimum distance between the cover body 501 and the top surface of the smoke hood 300 is greater than a set value. The specific method for achieving the above effect is not limited, and the shape of the convex curve 2 can be adjusted, and the connection position and inclination angle of the cover body 501 on the connecting rod 100 can also be changed. Other methods in the prior art are also acceptable.

[0098] In order to enable the cover plate 500 to cover the installation through hole 301 tightly and to avoid a hard collision between the cover plate 500 and the inner top surface of the smoke hood 300, the cover plate 500 can also be made of a flexible material with elastic deformation ability, which can be but not limited to rubber, plastic, etc. The area of ​​the cover plate 500 is slightly larger than the installation through hole 301. When the flap assembly 400 is completely opened, the cover plate 500 directly covers the installation through hole 301 or completely covers the installation through hole 301 after slightly elastic deformation, and the shielding effect is better. When the flap assembly 400 closes the smoke collecting port, the cover plate 500 moves to the inner top surface of the smoke collecting hood 300 along with the connecting rod 100. Because the cover plate 500 has the ability of elastic deformation, the cover plate 500 and the inner top surface of the smoke collecting hood 300 will not have a hard collision, that is, the cover plate 500 will undergo a certain degree of elastic deformation under the extrusion of the top surface of the smoke collecting hood 300, avoiding deformation of the smoke collecting hood 300 due to the extrusion of the cover plate 500, and extending the service life of the cover plate 500 and the smoke collecting hood 300. In this structure, the hanging through hole 503 on the cover plate 500 can be eliminated, the cover plate 500 is fixedly connected to the connecting rod 100, and the cover plate 500 cannot rotate around the center of the hanging through hole 503, and the overall structure is simpler.

[0099] The cover plate 500 can be directly mounted on the connecting rod 100, or mounted on other structures that can move synchronously with the connecting rod 100, or mounted on the connecting rod 100 and other structures at the same time. Figure 31 to Figure 34 As shown, the range fumes extraction device further includes a connecting rod cover assembly, which includes a wiring portion 601 and a mounting portion 602 connected to each other. The wiring portion 601 is detachably connected to the connecting rod 100 and is used to protect the line 700. The mounting portion 602 is connected to the flap assembly 400 and is used to assist in fixing the wiring portion 601. After assembly, the wiring portion 601 can move synchronously with the connecting rod 100, and a wire passing port 603 for passing the line 700 is provided on the wiring portion 601.

[0100] The wiring portion 601 is a structure with a side opening and a shape roughly the same as that of the connecting rod 100. The wiring portion 601 is sleeved on the outside of the connecting rod 100 through the side opening. A first hanging member 605 is provided on the wiring portion 601, and a second hanging member 103 is provided on the side of the connecting rod 100 exposed outside the wiring portion 601. The first hanging member 605 and the second hanging member 103 are arranged opposite to each other. The two hanging through holes 503 are respectively sleeved on the corresponding first hanging member 605 and the second hanging member 103 to achieve a stable connection of the cover plate 500. It can be understood that when hanging members are respectively provided on the opposite sides of the connecting rod 100, the two hanging through holes 503 are respectively sleeved on the corresponding hanging members on the connecting rod 100, and the method of use is the same.

[0101] A first stopper 504 is provided on the cover body 501, and a second stopper 606 is provided on the wiring portion 601. The first stopper 504 is located between the second stopper 606 and the mounting through hole 301. After assembly, the second stopper 606 can abut against the side of the stepped first stopper 504, or initially, a gap is left between the second stopper 606 and the side of the first stopper 504, and the second stopper 606 and the mounting through hole 301 are located on opposite sides of the first stopper 504. When the flap assembly 400 is opened, the second stopper 606 abuts against the first stopper 504, so that the cover 500 is pressed against the mounting through hole 301; when the flap assembly 400 is closed, the second stopper 606 is located outside the route of the cover body 501 for reverse swinging, and will not block the cover body 501 from swinging in reverse. It is understandable that the connecting rod 100 may be provided with structures other than the second limiting member 606 , and all structures need to be arranged at positions that do not block the cover plate body 501 from swinging in the reverse direction.

[0102] That is, when the cover plate 500 blocks the installation through hole 301, the second stopper 606 squeezes the first stopper 504 from the rear toward the installation through hole 301. When someone pushes the cover plate 500 with a finger, the second stopper 606 can prevent the cover plate 500 from swinging away from the installation through hole 301, thereby preventing the installation through hole 301 from opening, which is safer to use. The direction of the first stopper 504 toward the installation through hole 301 is the front, and the direction of the first stopper 504 facing away from the installation through hole 301 is the rear.

[0103] The specific connection method between the routing part 601 and the connecting rod 100 is not limited. In this embodiment, a buckle 604 is provided on the routing part 601. After the routing part 601 is sleeved on the outside of the connecting rod 100, the buckle 604 is buckled on the connecting rod 100, so that the routing part 601 can tightly hold the connecting rod 100, and the connection structure is tighter.

[0104] The wire opening 603 is semi-open, and the line 700 can be directly embedded in the wiring portion 601 without additional perforation, which has high work efficiency and low labor intensity. The edge of the wire opening 603 is an arc surface, which can avoid cutting or even cutting the line 700 and increase the service life of the line 700.

[0105] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A fume extraction device, comprising a connecting rod (100), a fume hood (300) and a flap assembly (400), wherein one end of the connecting rod (100) is connected to the flap assembly (400), and the other end of the connecting rod (100) is movably connected to the inner wall surface of the fume hood (300), and the fume hood (300) is provided with a mounting through hole (301) for passing the connecting rod (100), characterized in that: When the flap assembly (400) is in an open state, a closed state, and switching between the open state and the closed state, the distance between the connecting rod (100) and the edge of the mounting through hole (301) and the top surface of the smoke hood (300) during movement is always greater than a set value.

2. The range fumes extraction device according to claim 1, characterized in that: The connecting rod (100) comprises an inner concave curve (1), an end curve (3) and an outer convex curve (2) which are connected in sequence, and the inner concave curve (1) and / or the outer convex curve (2) are respectively formed by connecting at least two curves of different radii, and there is a smooth transition between two adjacent curves; during the movement of the connecting rod (100), the distance between the inner concave curve (1) and the edge of the mounting through hole (301) is always greater than a set value, and the distance between the outer convex curve (2) and the edge of the mounting through hole (301) and the top surface of the smoke hood (300) is always greater than a set value.

3. The range fumes extraction device according to claim 2, characterized in that: The concave curve (1) comprises a transition concave sub-curve N1, a cover end connecting concave sub-curve, an avoidance concave sub-curve N4 and a plate end connecting concave sub-curve which are sequentially connected from the end of the end curve (3), and the radius RN4 of the avoidance concave sub-curve N4 is smaller than the radius of all other concave sub-curves.

4. The range fumes extraction device according to claim 3, characterized in that: The plate end connecting sub-curve further comprises a fifth concave sub-curve N5, a sixth concave sub-curve N6 and a seventh concave sub-curve N7 which are sequentially connected from the end of the avoidance concave sub-curve N4 in a direction away from the end curve (3), and the radii of the fifth concave sub-curve N5, the sixth concave sub-curve N6 and the seventh concave sub-curve N7 gradually increase; and / or, The line connecting the point of the transition concave sub-curve N1 and the point O of the end curve (3) forms a straight line Q, and the distance between the transition concave sub-curve N1 and the straight line Q is H, 5mm≤H≤8mm; and / or, The distance between the avoidance concave sub-curve N4 and the nearest limit point is X, 4mm≤X≤6mm.

5. The range fumes extraction device according to claim 2, characterized in that: The convex curve (2) includes a transition convex sub-curve W1, a cover-end connecting convex sub-curve, an avoidance convex sub-curve W4 and a plate-end connecting convex sub-curve which are sequentially connected from the end of the end curve (3), and the radius RW4 of the avoidance convex sub-curve W4 is greater than the radius of all other convex sub-curves.

6. The range fumes extraction device according to claim 5, characterized in that: The hood end connecting outer convex sub-curve comprises an outer convex sub-curve reinforcement section W3 connected to the end of the avoidance outer convex sub-curve W4 and extending in the direction of the end curve (3), and the distance between the outer convex sub-curve reinforcement section W3 and the nearest limit point is Z, 3mm≤Z≤5mm; and / or, The distance between the inner concave curve (1) and the outer convex curve (2) is Y, 10mm≤Y≤15mm.

7. The range fumes extraction device according to any one of claims 1 to 6, characterized in that: The fume extraction device further comprises a cover plate (500), wherein the cover plate (500) is connected to the connecting rod (100), and when the flap assembly (400) is in the open state, the cover plate (500) covers the mounting through hole (301); when the flap assembly (400) is in the closed state, the distance between the cover plate (500) and the top surface of the fume collecting hood (300) is greater than a set value.

8. The range fumes extraction device according to claim 7, characterized in that: The cover plate (500) comprises a cover plate body (501), and the cover plate body (501) is movably connected to the connecting rod (100); when the flap assembly (400) is in the closed state, the cover plate body (501) can abut against the top surface of the smoke hood (300) and swing in the opposite direction, so that the minimum distance between the cover plate body (501) and the top surface of the smoke hood (300) is greater than a set value; or, The cover plate (500) comprises a cover plate body (501), and the cover plate body (501) is fixedly connected to the connecting rod (100); when the flap assembly (400) is in the closed state, the minimum distance between the cover plate body (501) and the top surface of the smoke hood (300) is greater than a set value.

9. The range fumes extraction device according to claim 8, characterized in that: When the cover plate body (501) is hinged to the connecting rod (100), two suspension arms (502) are arranged on the cover plate body (501) in a relative manner, and a suspension through hole (503) is provided on the suspension arm (502), and at least a second suspension member (103) is provided on the connecting rod (100), and one of the suspension through holes (503) is sleeved on the second suspension member (103); and / or, A first limiting member (504) is provided on the cover plate body (501), and a second limiting member (606) is provided on the connecting rod (100), wherein the first limiting member (504) is located between the second limiting member (606) and the mounting through hole (301); when the flap assembly (400) is opened, the second limiting member (606) abuts against the first limiting member (504) so ​​that the cover plate (500) is pressed against the mounting through hole (301).

10. The range fumes extraction device according to any one of claims 1 to 6, characterized in that: The fume extraction device further comprises a cover plate (500), wherein the cover plate (500) is connected to the connecting rod (100) and is made of a flexible material having elastic deformation capability; when the flap assembly (400) is in the open state, the cover plate (500) blocks the mounting through hole (301); when the flap assembly (400) is in the closed state, the cover plate (500) undergoes elastic deformation to prevent the cover plate (500) from squeezing the top surface of the smoke hood (300) and causing the smoke hood (300) to deform.

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