Range hood

Abstract

The utility model discloses a range hood which comprises an upper box body, a fan system arranged in the upper box body, a lower box body at least partially located below the upper box body and a movement mechanism used for driving the lower box body to ascend and descend relative to the upper box body, the movement mechanism comprises a driving mechanism in the form of a linear driving module, and the driving mechanism is partially located in the upper box body. The movement mechanism further comprises a connecting plate which is arranged in the upper box body so as to isolate the driving mechanism from oil fume in the upper box body; the range hood further comprises a flow guide part, the flow guide part comprises a bottom plate, the front side end of the bottom plate is higher than the rear side end, the bottom plate is a round sliding plate part, and the front side end of the bottom plate is located on the front side of the connecting plate and higher than the lower end of the connecting plate. Compared with the prior art, the connecting structure has the advantages that the flow guide part is arranged below the connecting plate, so that oil on the connecting plate cannot stay on the bent edge of the connecting plate, the oil is guided downwards through the flow guide part, the front end of the flow guide part is not provided with the bent edge, and a new oil stay point cannot be brought.

Description

Technical Field

[0001] The utility model relates to an oil fume purification device, in particular to a range hood. Background Art

[0002] With the improvement of users' requirements for the appearance and use environment of kitchen range hoods, the retractable range hood descends when in use and retracts when shut down, which can greatly release the countertop space and is also convenient for users to clean. Therefore, it has been more and more widely used.

[0003] The retractable range hood generally includes an upper box body assembly and a lower box body assembly. The upper box body assembly internally contains a range hood fan assembly, left and right side mounting guide rails, and a motor controls a worm to rotate to drive a nut buckle to move up and down; the lower box body assembly is provided with a connecting plate. The middle of the connecting plate is fixed to the nut buckle on the upper box body, and the lower ends of the left and right sides are connected to the angle steel structures. The upper ends of the angle steels are connected to the guide rails on the upper box body. The motor of the upper box body controls the worm to rotate, and the nut buckle drives the lower box body assembly to move up and down. The connection between the left and right guide rails and the lower box body can ensure the stability of the lower box body assembly when moving up and down. For example, a range hood disclosed in a Chinese patent with the application number 202120687386.3 by the applicant. To improve the reliability of the worm, the worm usually cannot be contacted by the oil fume inside the range hood. The worm is isolated by a connecting plate in the shape of a "ji" character and the inside of the fan frame. For details, refer to the appendix of this patent. Figure 7 .

[0004] Refer to the appendix of the present utility model again Fig. 9 , the lower end of the connecting plate 100 in the shape of a "ji" character is connected to the upper box body 200 to form a bent edge 300. The oil liquid at the upper end of the connecting plate 100 in the shape of a "ji" character flows onto the bent edge 300. Usually, an inclination angle (gradually inclined downward from front to back, and the inclination angle > 12°) is set at the lower end of the connecting plate 100 in the shape of a "ji" character to allow the oil liquid to flow downward naturally. In fact, due to the strong suction force of the fan system 400 on the bent edge 300, the oil liquid on the bent edge 300 will stay and accumulate, and gradually be peeled off from the connecting plate 100 and then fall. This phenomenon is more obvious as the suction force on the bent edge 300 is greater, and it cannot be solved by appropriately increasing the inclination angle at the lower end of the connecting plate 100 in the shape of a "ji" character. The falling oil droplets will pass through the filter screen of the lower box body below and drip onto the user's countertop, affecting the user experience.

[0005] Therefore, further improvement is still needed. Summary of the Utility Model

[0006] The technical problem to be solved by the present utility model is to provide a range hood aiming at the deficiencies of the above-mentioned existing technologies, reducing the risk of oil liquid dripping downward through the range hood.

[0007] The technical solution adopted by the utility model to solve the above technical problems is: a range hood, comprising an upper box, a fan system arranged in the upper box, a lower box at least partially located below the upper box, and a motion mechanism for driving the lower box to rise and fall relative to the upper box, the motion mechanism comprising a driving mechanism in the form of a linear drive module, the driving mechanism is partially located in the upper box, and the motion mechanism also includes a connecting plate arranged in the upper box to isolate the driving mechanism from the oil smoke in the upper box; the characteristics are:

[0008] The range hood also includes a guide member, which includes a bottom plate, a front end of the bottom plate is higher than a rear end, the bottom plate is a circular sliding plate member protruding downward, and the front end of the bottom plate is located in front of the connecting plate and is higher than the lower end of the connecting plate.

[0009] By arranging a guide piece under the connecting plate, the oil on the connecting plate will not stay on its bent edge, but will be guided downward by the guide piece. The front end of the guide piece itself has no bent edge and will not bring new oil retention points, which better solves the problem of oil floating on the bent edge at the bottom of the connecting plate.

[0010] Preferably, in order to facilitate guiding the oil backward, the angle between the tangent line at any point on the upper surface or the lower surface of the bottom plate and the horizontal plane is α, and α>20°.

[0011] Furthermore, in order to facilitate the collection of oil flowing down from various places on the connecting plate, the guide member also includes a side plate and a rear plate. The side plate has two and extends upward from the left and right sides of the bottom plate respectively, and the rear plate extends upward from the rear side of the bottom plate. The left and right sides of the connecting plate are surrounded and contacted by the side plates.

[0012] In order to facilitate the oil in the guide member to be discharged and flow downward until being collected, a first oil leakage hole is opened on the rear end of the side plate, and a second oil leakage hole is opened on the rear plate.

[0013] Furthermore, an inner filter is provided at the bottom of the upper box body, and the inner filter is located below the fan system, so that the oil of the upper box body and the fan system can be collected through the inner filter screen.

[0014] Furthermore, in order to prevent the lower end of the guide plate from fitting poorly with the upper box body and causing oil dripping, the upper box body includes a rear side wall located on the rear side, the connecting plate is arranged on the rear side wall, and the inner filter includes a filter body and a mounting portion arranged around the filter body, and the top of the mounting portion arranged on the rear side of the filter body is inserted between the guide piece and the rear side wall of the upper box body, thereby guiding the oil downward through the mounting portion.

[0015] In order to further guide the oil, a bulge protruding forward is provided on the mounting portion, and the bulge is located below and close to the lower end of the guide member, and the bulge covers the guide member in the left and right directions. The width of the guide member in the left and right directions is d1, and the width of the bulge in the left and right directions is d2, and d2>d1 is satisfied.

[0016] To facilitate the insertion of the mounting portion, the horizontal distance between the lower end of the guide member and the mounting portion is a, and satisfies a>1.5 mm, and the height of the convex protrusion is b, and satisfies b>a.

[0017] Preferably, in order to facilitate the bulge to guide the oil quickly downward, the front side of the bulge includes a first inclined wall, a straight wall and a second inclined wall arranged in sequence from top to bottom, the first inclined wall extends from the mounting portion forward and gradually downward, the straight wall extends downward from the front end of the first inclined wall, and the second inclined wall gradually slopes downward from the lower end of the straight wall backward to the mounting portion, and the inclination angle between the second inclined wall and the horizontal plane is β, and satisfies β>30°.

[0018] To facilitate limiting the position of the connecting plate, the upper box body includes a rear side wall located on the rear side, a clearance opening is formed on the rear side wall, the position of the clearance opening corresponds to the driving mechanism, the upper box body is formed with ribs extending upward into the box body on the left and right sides of the clearance opening, the connecting plate is located between the two ribs, and the upper box body is provided with a support seat extending upward into the box body at the bottom of the clearance opening, the front end of the support seat is bent upward to form a flange, the lower end of the connecting plate is supported on the support seat, and the front side of the connecting plate is limited by the flange.

[0019] Preferably, the fan system includes at least a first suction port toward the rear side, thereby achieving direct suction and discharge, and even in this installation mode of the fan system, due to the setting of the guide member, there is no risk of oil staying at the lower end of the connecting plate and peeling off.

[0020] Preferably, in order to stably drive the lower box body to rise and fall, the driving mechanism includes a motor and a screw driven by the motor to rotate around its own axis, and the lower box body is directly or indirectly threadedly connected to the screw rod;

[0021] The screw rod extends up and down and is rotatably arranged in the upper box body, and the connecting plate isolates the screw rod from the oil smoke.

[0022] Compared with the prior art, the advantages of the utility model are: by arranging a guide piece under the connecting plate, the oil on the connecting plate will not stay on the bent edge thereof, but will be guided downward by the guide piece, and the front end of the guide piece itself has no bent edge, and will not bring new oil retention points, which better solves the problem of oil floating on the bent edge at the bottom of the connecting plate; by utilizing the mounting portion of the inner filter and the convex bump on the mounting portion, the oil at the lower end of the guide piece can be guided to flow downward when the guide piece does not fit well with the rear side wall of the upper box body. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of a range hood according to an embodiment of the utility model (viewed from front to back);

[0024] Figure 2 A schematic diagram of a range hood according to an embodiment of the utility model (viewed from the back to the front);

[0025] Figure 3 It is a cross-sectional view (front-to-back cross-section) of a range hood according to an embodiment of the utility model;

[0026] Figure 4 This is a cross-sectional view of a range hood according to an embodiment of the utility model (section and Figure 2 parallel);

[0027] Figure 5 for Figure 4 A schematic diagram of the partial enlargement of Ⅰ;

[0028] Figure 6 A schematic diagram of a flow guide member of a range hood according to an embodiment of the utility model;

[0029] Figure 7 It is a cross-sectional view of the upper box body, the moving mechanism, the flow guide and the inner filter of the range hood of the embodiment of the utility model;

[0030] Figure 8 It is a schematic diagram of the upper box body of the range hood according to an embodiment of the utility model (with the front side wall hidden);

[0031] Fig. 9 It is a cross-sectional view of a range hood in the prior art. DETAILED DESCRIPTION

[0032] Embodiments of the present utility model are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions.

[0033] In the description of the present utility model, 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 the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, 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. Since the embodiments disclosed in the present utility model can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0034] See also Figures 1 to 8 A range hood includes an upper housing 1, a lower housing 2, a fan system 3 disposed in the upper housing 1, and a motion mechanism for driving the lower housing 2 to rise and fall relative to the upper housing 1. The fan system 3 is a centrifugal fan, the axis of which extends in the front-to-back direction, and the fan system 3 at least includes a first suction port 31 facing the rear side, and optionally, the fan system 3 may also include a second suction port 32 facing the front side.

[0035] The upper box body 1 includes a box body 11, and the box body 11 includes a front cover plate 111 and a rear side wall 112 arranged at intervals in front and back. The lower box body 2 is at least partially located below the upper box body 1, and at least partially covered on the outer periphery of the upper box body 1, so that when the lower box body 2 is raised or lowered relative to the upper box body 1, oil leakage at the gap between the upper box body 1 and the lower box body 2 can be avoided. An air inlet 21 is provided at the bottom of the lower box body 2, and an outer filter 51 is provided at the air inlet 21. An inner filter 52 can be provided at the bottom of the upper box body 1. The inner filter 52 is located below the fan system 3 and is used to receive the oil dripping from the upper box body 1 and the fan system 3.

[0036] The motion mechanism includes a motor 41 and a screw rod 42. The motor 41 can be fixedly arranged on the top of the upper box body 1, while the screw rod 42 extends up and down and is rotatably arranged in the upper box body 1. The screw rod 42 can be driven by the motor 41 to rotate around its own axis. The lower box body 2 can be directly or indirectly threadedly connected to the screw rod 42. For example, a nut buckle 45 can be fixed on the lower box body 2. The motor 41, the screw rod 42 and the nut buckle 45 constitute a driving mechanism in the form of a linear drive module. The nut buckle 45 is sleeved on the screw rod 42 and is threadedly connected to the screw rod 42. Therefore, when the screw rod 42 rotates, the nut buckle 45 drives the lower box body 2 to rise and fall. In order to ensure the stable operation of the lower box body 2, a guide rail assembly 44 can usually be set on the left and right sides of the upper box body 1 and the lower box body 2. The above-mentioned method of driving the lower box body 2 to rise and fall can adopt the existing technology, which will not be repeated here.

[0037] In order to improve the reliability of the screw rod 42, the screw rod 42 is usually not contacted by the oil smoke inside the range hood. Therefore, the movement mechanism also includes a connecting plate 43. The cross section of the connecting plate 43 is in the shape of a "J". The connecting plate 43 cooperates with the rear side wall 112 of the upper box body 1 to enclose the screw rod 42 therein, thereby isolating the screw rod 42 from the oil smoke inside the upper box body 1. A clearance opening 113 is formed on the rear side wall 112 of the upper box body 1. The position of the clearance opening 113 corresponds to the screw rod 42, so that the screw rod 42 is exposed at the rear side of the upper box body 1 and can be connected to the lower box body 2. The upper box body 1 is formed with retaining edges 14 extending into the upper box body 1 on both sides of the clearance opening 113. The connecting plate 43 is located between the two retaining edges 14, and the position in the left and right directions is limited by the retaining edges 14. The upper end of the screw rod 42 is rotatably connected to the top of the upper box body 1. A support seat 12 extending upward into the upper box body 1 is provided at the bottom of the yielding opening 113 in the upper box body 1. The front end of the support seat 12 is bent upward to form a flange 13. The lower end of the connecting plate 43 is supported on the support seat 12, and the front side of the connecting plate 43 is limited by the flange 13. The lower end of the screw rod 42 can be rotatably connected to the front lower end of the connecting plate 43 (a mounting seat can be provided inside the connecting plate 43). The upper end of the connecting plate 43 can be provided with a limiting component or can be directly fixed to the upper box body 1 by a fastener.

[0038] In order to prevent oil from floating from the lower end of the connecting plate 43, the range hood further includes a guide member 6, which includes a bottom plate 61, side plates 62 located on the left and right sides of the bottom plate 61, and a rear plate 63 located on the rear side of the bottom plate 61. The front end of the bottom plate 61 is higher than the rear end. Preferably, the bottom plate 61 gradually tilts downward from the front to the back. In this embodiment, the bottom plate 61 is a circular sliding plate member protruding downward, such as an arc-shaped plate member. The front end of the bottom plate 61 is located at the front side of the connecting plate 43 and is higher than the lower end of the connecting plate 43. The angle between the tangent line of any point on the upper surface or lower surface of the bottom plate 61 (the bottom plate 61 is a plate member with equal wall thickness) and the horizontal plane is α, and α>20°. The side plates 62 of the guide member 6 have two and extend upward from the left and right sides of the bottom plate 61 respectively, and the rear plate 63 extends upward from the rear side of the bottom plate 61, so that the left and right sides of the connecting plate 43 are surrounded and contacted by the side plates 62.

[0039] Thus, the oil flowing down from the connecting plate 43 can be received by the guide member 6 , and since the bottom plate 61 is smooth and has no bent edges, the oil can be prevented from condensing at the front end of the guide member 6 due to the bent edges.

[0040] To facilitate the discharge of oil in the guide member 6, a first oil leakage hole 621 is opened at the rear end of the side plate 62, and a second oil leakage hole 631 is opened in the middle position of the rear plate 63, so that the oil inside the guide member 6 can flow out through the first oil leakage hole 621 and the second oil leakage hole 631.

[0041] Since the guide member 6 is usually made of plastic, there are factors such as material deformation, and the lower end of the guide member 6 (the junction between the rear end of the bottom plate 61 and the lower end of the rear plate 63) cannot be completely fitted with the rear side wall 112 of the upper box body 1, and the oil at the lower end may not be guided to the rear side wall 112 of the upper box body 1 and drip. To solve this problem, the inner filter 52 includes a filter body 521 and a mounting portion 522 arranged around the filter body 521. The mounting portion 522 can be arranged around the filter body 521 or on two opposite sides of the filter body 521. It extends upward from the periphery of the filter body 521 and is fixed to the upper box body 1. In this embodiment, the mounting portion 522 is at least arranged around the rear side of the filter body 521. The top of the rear mounting portion 522 is inserted between the air guide 6 and the rear side wall 112 of the upper box body 1, and a convex bump 523 protruding forward is provided on the mounting portion 522, and the convex bump 523 is located below and close to the lower end of the air guide 6. The convex bump 523 covers the air guide 6 in the left-right direction, and the width of the air guide 6 in the left-right direction is d1, and the width of the convex bump 523 in the left-right direction is d2, satisfying d2>d1.

[0042] The front side of the convex hump 523 includes a first inclined wall 5231, a straight wall 5232 and a second inclined wall 5233 arranged in sequence from top to bottom, and the three can be an integrated structure. The first inclined wall 5231 extends from the mounting portion 522 to the front and gradually tilts downward, and the straight wall 5232 extends downward from the front end of the first inclined wall 5231, preferably vertically or nearly vertically, and the second inclined wall 5233 gradually tilts downward from the lower end of the straight wall 5232 to the mounting portion 522. The front side of the convex hump 523 is not limited to the above-mentioned three-stage shape, and can also be a smooth surface. The horizontal distance between the lower end of the guide member 6 and the mounting portion 522 is a. To facilitate the insertion of the mounting portion 522, a satisfies a>1.5mm. The height of the convex hump 523 is b, such as the horizontal distance between the straight wall 5232 and the mounting portion 522 in this embodiment, and b>a is satisfied. The inclination angle between the second inclined wall 5233 and the horizontal plane is β, β is as large as possible, and β>30° is satisfied in this embodiment. Through the above structural design, even if the lower end of the guide member 6 does not fit well with the rear side wall 112 of the upper box body 1, the oil droplets dripping from the lower end will be received by the convex bump 523 of the inner filter 52 and then guided to the oil cup 7 set at the bottom of the rear side of the lower box body 2.

[0043] In this embodiment, the driving mechanism includes a motor 41 and a screw 42 , which may alternatively be other forms of linear driving modules, such as an electric push rod, a motor gear rack combination, etc., and the part located in the upper box body 1 is isolated by a connecting plate 43 .

Claims

1. A range hood, comprising an upper housing (1), a fan system (3) arranged in the upper housing (1), a lower housing (2) at least partially located below the upper housing (1), and a motion mechanism for driving the lower housing (2) to rise and fall relative to the upper housing (1), the motion mechanism comprising a driving mechanism in the form of a linear drive module, the driving mechanism being partially located in the upper housing (1), the motion mechanism further comprising a connecting plate (43) arranged in the upper housing (1) to isolate the driving mechanism from oil smoke in the upper housing (1); characterized in that: The range hood further comprises a flow guide (6), wherein the flow guide (6) comprises a bottom plate (61), wherein the front end of the bottom plate (61) is higher than the rear end, and the bottom plate (61) is a circular sliding plate protruding downward, wherein the front end of the bottom plate (61) is located in front of the connecting plate (43) and is higher than the lower end of the connecting plate (43).

2. The range hood according to claim 1, characterized in that: The angle between the tangent line at any point on the upper surface or the lower surface of the bottom plate (61) and the horizontal plane is α, and α>20°.

3. The range hood according to claim 1, characterized in that: The guide member (6) further comprises a side plate (62) and a rear plate (63), wherein the side plate (62) has two and extends upwards from the left and right sides of the bottom plate (61), respectively, and the rear plate (63) extends upwards from the rear side of the bottom plate (61), and the left and right sides of the connecting plate (43) are surrounded and contacted by the side plates (62).

4. The range hood according to claim 3, characterized in that: A first oil leakage hole (621) is provided at the rear end of the side plate (62), and a second oil leakage hole (631) is provided on the rear plate (63).

5. The range hood according to claim 1, characterized in that: An inner filter (52) is provided at the bottom of the upper box body (1), and the inner filter (52) is located below the fan system (3).

6. The range hood according to claim 5, characterized in that: The upper box body (1) comprises a rear side wall (112) located at the rear side, the connecting plate (43) is arranged on the rear side wall (112), the inner filter (52) comprises a filter body (521) and a mounting portion (522) arranged around the filter body (521), and the top of the mounting portion (522) arranged on the rear side of the filter body (521) is inserted between the guide member (6) and the rear side wall (112) of the upper box body (1).

7. The range hood according to claim 6, characterized in that: The mounting portion (522) is provided with a convex bump (523) protruding forward, the convex bump (523) is located below the lower end of the flow guide (6) and close to the lower end of the flow guide (6), the convex bump (523) covers the flow guide (6) in the left-right direction, the width of the flow guide (6) in the left-right direction is d1, the width of the convex bump (523) in the left-right direction is d2, and d2>d1 is satisfied.

8. The range hood according to claim 7, characterized in that: The horizontal distance between the lower end of the guide member (6) and the mounting portion (522) is a, and satisfies a>1.5 mm, and the height of the protrusion of the convex bump (523) is b, and satisfies b>a.

9. The range hood according to claim 8, characterized in that: The front side of the convex hump (523) includes a first inclined wall (5231), a straight wall (5232) and a second inclined wall (5233) which are arranged in sequence from top to bottom, wherein the first inclined wall (5231) extends forward and gradually downward from the mounting portion (522), the straight wall (5232) extends downward from the front end of the first inclined wall (5231), and the second inclined wall (5233) extends backward and gradually downward from the lower end of the straight wall (5232) to the mounting portion (522), and the inclination angle between the second inclined wall (5233) and the horizontal plane is β, and satisfies β>30°.

10. The range hood according to claim 1, characterized in that: The upper box body (1) comprises a rear side wall (112) located at the rear side, a clearance opening (113) is formed on the rear side wall (112), the position of the clearance opening (113) corresponds to the driving mechanism, the upper box body (1) is formed with retaining edges (14) extending into the upper box body (1) on the left and right sides of the clearance opening (113), the connecting plate (43) is located between the two retaining edges (14), a support seat (12) extending into the upper box body (1) is provided at the bottom of the clearance opening (113) in the upper box body (1), the front end of the support seat (12) is bent upward to form a flange (13), the lower end of the connecting plate (43) is supported on the support seat (12), and the front side of the connecting plate (43) is limited by the flange (13).

11. The range hood according to claim 10, characterized in that: The fan system (3) comprises at least a first suction port (31) facing the rear side.

12. The range hood according to claim 1, characterized in that: The driving mechanism comprises a motor (41) and a screw rod (42) driven by the motor (41) to rotate around its own axis, and the lower box (2) is directly or indirectly threadedly connected to the screw rod (42); The screw rod (42) extends up and down and is rotatably arranged in the upper box body (1), and the connecting plate (43) isolates the screw rod (42) from oil smoke.

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