Range hood

Abstract

The utility model discloses a kind of range hood, it belongs to kitchen electrical appliance technical field, range hood includes fume collecting hood, first driving mechanism, push plate and elastic component, air inlet is provided on fume collecting hood, first driving mechanism is set in fume collecting hood, first driving mechanism includes first motor and eccentric structure, first motor can drive eccentric structure rotates around first axis;Push plate can open or close at least part air inlet, eccentric structure rotates around first axis when can push plate moves from first closed position to first open position;Elastic component is set between fume collecting hood and push plate, and elastic component is used to apply reset force to push plate to make push plate move from first open position to first closed position.First motor cooperates with eccentric structure, realize push plate linear movement, simple and compact structure, small space occupation;Reset force provided by elastic component makes push plate can stably be in first closed position, there is no gap.

Description

Technical Field

[0001] This utility model relates to the field of kitchen appliance technology, and in particular to a range hood. Background Technology

[0002] A range hood is a common kitchen appliance used to purify the kitchen environment. It can quickly remove harmful gases produced by gas stove combustion and oil fumes generated during cooking and exhaust them outdoors, reducing the harm of harmful gases and oil fumes to the human body and improving the comfort of users while cooking.

[0003] Existing range hoods typically use a motor and linkage mechanism to drive the air guide plate, resulting in a complex structure and large space occupation. Because only one linkage has a power mechanism, it creates a one-sided drive, causing an imbalance in the force on the air guide plate. After the air guide plate closes, the driven end closes tightly, while the undriven end closes loosely, leaving gaps around the air guide plate. Utility Model Content

[0004] The purpose of this utility model is to provide a range hood that solves the technical problems of complex drive mechanisms and gaps after the air guide plate is closed in the prior art.

[0005] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0006] A range hood, comprising:

[0007] A smoke hood, wherein an air inlet is provided on the smoke hood;

[0008] A first driving mechanism is disposed on the smoke collection hood. The first driving mechanism includes a first motor and an eccentric structure. The first motor can drive the eccentric structure to rotate around a first axis.

[0009] The push plate is capable of opening or closing at least part of the air inlet, and the eccentric structure, when rotating about the first axis, can push the push plate from the first closed position to the first open position.

[0010] An elastic component is disposed between the smoke hood and the push plate. The elastic component is used to apply a restoring force to the push plate to move the push plate from a first open position to a first closed position.

[0011] Preferably, the eccentric structure is a cam, and the outer peripheral surface of the cam is an arc-shaped surface that can abut against the push plate.

[0012] Preferably, the outer peripheral surface of the cam is recessed with a weight-reducing groove, and the end of the cam away from the first axis gradually narrows to form an arc-shaped guide portion.

[0013] Preferably, the elastic component includes a spring and a linkage assembly, one end of the spring is connected to the smoke hood, the other end of the spring is connected to the push plate, and the linkage assembly includes a first link and a second link hinged to each other, the end of the first link away from the second link is hinged to the smoke hood, and the end of the second link away from the first link is hinged to the push plate.

[0014] Preferably, the smoke hood includes a hood body and a support member disposed within the hood body. The eccentric structure is rotatably connected to the support member, and the spring and the first connecting rod are both connected to the support member. The support member is provided with a guide groove, and the first connecting rod is provided with a guide protrusion, which is slidably disposed within the guide groove.

[0015] Preferably, the elastic component includes two sets of connecting rods, which are distributed on both sides of the spring. The two first connecting rods are hinged to the smoke hood at a first hinge axis, and the two second connecting rods are hinged to the push plate at a second hinge axis.

[0016] Preferably, at least two eccentric structures are provided, and each eccentric structure is arranged at intervals along the first axis and shares the first motor.

[0017] Preferably, each of the eccentric structures is provided with two sets of elastic components, which are distributed on both sides of the first axis.

[0018] Preferably, the system also includes a flap and a second drive mechanism. The flap is disposed on the upper side of the push plate and is rotatably connected to the smoke collection hood. The second drive mechanism can drive the flap to rotate between a second closed position and a second open position. The flap in the second closed position can be joined with the push plate in the first closed position to close the air inlet.

[0019] Preferably, the second drive mechanism includes a second motor, a gear, and an arc-shaped rack. The gear is disposed on the smoke hood and connected to the second motor, and the arc-shaped rack is connected to the flap and meshes with the gear.

[0020] The beneficial effects of this utility model are:

[0021] The range hood proposed in this utility model has an air inlet on the smoke collection hood. A push plate can open or close at least part of the air inlet. When open, a first motor drives an eccentric structure to rotate around a first axis, so that the eccentric structure pushes the push plate from a first closed position to a first open position. During the process of pushing the push plate, the eccentric structure overcomes the elastic force of the elastic component. When closed, the first motor drives the eccentric structure to rotate around the first axis, so that the eccentric structure moves away from the push plate. The elastic component applies a restoring force to the push plate, so that the push plate moves from the first open position to the first closed position. The first motor and the eccentric structure work together to achieve linear movement of the push plate. The structure is simple and compact, occupies little space, and can reduce vibration during movement. The restoring force provided by the elastic component ensures that the push plate can be stably in the first closed position without gaps, improving the return accuracy of the push plate. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the range hood in the off state provided in this embodiment;

[0023] Figure 2 This is a schematic diagram of a range hood provided in this embodiment;

[0024] Figure 3 This is a schematic diagram of another range hood provided in this embodiment;

[0025] Figure 4 This is a schematic diagram of the push plate in the first closed position provided in this embodiment;

[0026] Figure 5 This is a schematic diagram of the eccentric structure provided in this embodiment;

[0027] Figure 6 This is a schematic diagram of an eccentric structure provided on the push plate in this embodiment;

[0028] Figure 7 This is a schematic diagram of two eccentric structures provided on the push plate in this embodiment;

[0029] Figure 8 This is a schematic diagram of the flap being in the second closed position according to this embodiment;

[0030] Figure 9 This is a schematic diagram of the range hood in the open state provided in this embodiment;

[0031] Figure 10 This is a schematic diagram of the range hood provided in this embodiment;

[0032] Figure 11 This is a schematic diagram of the push plate in the first open position provided in this embodiment;

[0033] Figure 12This is a schematic diagram of the flap being in the second open position according to this embodiment;

[0034] Figure 13 This is a schematic diagram of the second drive mechanism provided in this embodiment.

[0035] In the picture:

[0036] 10. Smoke hood; 101. Air inlet; 102. Smoke collection chamber; 11. Front panel; 12. Back panel; 13. Top panel; 14. Side panel; 15. First fixing plate; 16. Second fixing plate; 17. Support component; 171. Guide groove; 18. Base;

[0037] 20. First drive mechanism; 21. Eccentric structure; 211. Weight reduction groove; 212. Arc-shaped guide part; 22. Drive shaft;

[0038] 30. Push plate;

[0039] 40. Elastic component; 41. Spring; 42. First link; 43. Second link; 44. Guide protrusion;

[0040] 50. Flip-board;

[0041] 60. Second drive mechanism; 61. Gear; 62. Arc-shaped rack;

[0042] 71. Guide rod. Detailed Implementation

[0043] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0044] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0045] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0046] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0047] See Figures 1 to 13 This embodiment provides a range hood, including a smoke collection hood 10, a first drive mechanism 20, a push plate 30, and an elastic component 40. The smoke collection hood 10 is provided with an air inlet 101. The first drive mechanism 20 is disposed on the smoke collection hood 10 and includes a first motor and an eccentric structure 21. The first motor can drive the eccentric structure 21 to rotate around a first axis. The push plate 30 can open or close at least part of the air inlet 101. When the eccentric structure 21 rotates around the first axis, it can push the push plate 30 from a first closed position to a first open position. The elastic component 40 is disposed between the smoke collection hood 10 and the push plate 30. The elastic component 40 is used to apply a restoring force to the push plate 30 to move the push plate 30 from the first open position to the first closed position.

[0048] The smoke hood 10 is provided with an air inlet 101, and the push plate 30 can open or close at least part of the air inlet 101. The range hood has a closed state and an open state. When open, the first motor drives the eccentric structure 21 to rotate around the first axis, so that the eccentric structure 21 pushes the push plate 30 from the first closed position to the first open position. During the process of pushing the push plate 30, the eccentric structure 21 overcomes the elastic force of the elastic component 40. When closed, the first motor drives the eccentric structure 21 to rotate around the first axis, so that the eccentric structure 21 moves away from the push plate 30, and the elastic component 40 applies a restoring force to the push plate 30 to move the push plate 30 from the first open position to the first closed position. The first motor and the eccentric structure 21 cooperate to realize the linear movement of the push plate 30. The structure is simple and compact, occupies little space, and can reduce vibration during movement. The restoring force provided by the elastic component 40 ensures that the push plate 30 can be stably in the first closed position without gaps, improving the return accuracy of the push plate 30.

[0049] In some embodiments, the push plate 30 can open or close the entire air inlet 101. In some embodiments, the push plate 30 can open or close part of the air inlet 101. The range hood also includes a flap 50 and a second drive mechanism 60. The flap 50 is disposed on the upper side of the push plate 30 and is rotatably connected to the smoke collection hood 10. The second drive mechanism 60 can drive the flap 50 to rotate between a second closed position and a second open position. The flap 50 in the second closed position can be joined with the push plate 30 in the first closed position to close the air inlet 101.

[0050] The structure of the smoke hood 10 can be configured according to actual needs. For example, the smoke hood 10 includes a front plate 11, a back plate 12, a top plate 13, and a side plate 14. The front plate 11, back plate 12, top plate 13, and side plate 14 form a smoke collection cavity 102. The air inlet 101 communicates with the smoke collection cavity 102. The height of the front plate 11 in the vertical direction is less than the height of the back plate 12 in the vertical direction, so that the air inlet 101 extends downward from front to back at an angle.

[0051] In this embodiment, the first axis of the eccentric structure 21 extends along the left-right direction of the smoke hood 10, that is, the first axis is perpendicular to the side plate 14 of the smoke hood 10. The first axis is represented by the straight line O1 in the figure.

[0052] The smoke hood 10 also includes a first fixing plate 15 disposed on the lower side of the push plate 30 and a second fixing plate 16 disposed on the upper side of the flip plate 50, for supporting purposes. An oil cup is provided at the bottom of the smoke hood 10.

[0053] In some embodiments, such as Figure 2 As shown, the eccentric structure 21 is a cam, which is easy to manufacture. The outer peripheral surface of the cam is an arc-shaped surface, which can abut against the push plate 30 to ensure the stability of motion transmission, so that the push plate 30 moves smoothly, avoids vibration and jamming, and reduces failures. The contour line of the outer peripheral surface of the cam can be set according to actual needs to control the stroke of the push plate 30.

[0054] In some embodiments, such as Figures 3 to 5 As shown, a weight-reducing groove 211 is recessed on the outer peripheral surface of the cam, and the end of the cam away from the first axis gradually narrows to form an arc-shaped guide portion 212. While reducing weight, it occupies less space. The arc-shaped guide portion 212 plays a guiding role to guide the eccentric structure 21 to smoothly abut against the push plate 30, avoiding vibration and jamming.

[0055] See Figure 3 and Figure 4The elastic component 40 includes a spring 41 and a linkage assembly. One end of the spring 41 is connected to the smoke hood 10, and the other end is connected to the push plate 30. The linkage assembly includes a first link 42 and a second link 43 hinged to each other. The end of the first link 42 away from the second link 43 is hinged to the smoke hood 10, and the end of the second link 43 away from the first link 42 is hinged to the push plate 30. When the push plate 30 is opened, the spring 41 extends, and the first link 42 and the second link 43 rotate relative to each other to support and guide the spring 41.

[0056] Exemplarily, the smoke hood 10 includes a hood body and a support member 17 disposed within the hood body. An eccentric structure 21 is rotatably connected to the support member 17, and both the spring 41 and the first connecting rod 42 are connected to the support member 17. The support member 17 provides support, and its position is not limited here, allowing the eccentric structure 21 and the spring 41 to be arranged closer to the air inlet 101. Exemplarily, one end of the support member 17 is fixedly connected to the first fixing plate 15.

[0057] The support member 17 is provided with a guide groove 171, and the first connecting rod 42 is provided with a guide protrusion 44, which is slidably disposed in the guide groove 171. The guide protrusion 44 cooperates with the guide groove 171 to guide the first connecting rod 42, thereby limiting the movement path of the second connecting rod 43, guiding the spring 41 to extend in a straight line, preventing the spring 41 from swinging relative to the smoke hood 10, and thus preventing the push plate 30 from swinging relative to the smoke hood 10.

[0058] Specifically, the guide groove 171 is arranged in an arc or ring shape around the hinge position between the first connecting rod 42 and the support member 17, and the first connecting rod 42 moves in an arc around the hinge position between the first connecting rod 42 and the support member 17.

[0059] In some embodiments, the elastic component 40 includes two sets of linkages distributed on both sides of the spring 41. Two first linkages 42 are hinged to the smoke hood 10 at a first hinge axis, and two second linkages 43 are hinged to the push plate 30 at a second hinge axis. By setting two sets of linkages, the push plate 30 is subjected to balanced force and moves smoothly, which also ensures the smoothness of the extension and retraction of the spring 41. Exemplarily, one end of the spring 41 is connected to the first hinge axis, and the other end of the spring 41 is connected to the second hinge axis.

[0060] For two sets of linkages, a guide protrusion 44 can be provided for only one first linkage 42, or both first linkages 42 can be provided with guide protrusions 44. The two guide protrusions 44 can share a guide groove 171.

[0061] For push plate 30, an eccentric structure 21 can be set, such as Figure 6As shown, the eccentric structure 21 is located in the middle of the push plate 30 to ensure that the push plate 30 is subjected to balanced forces. For the push plate 30, two or more eccentric structures 21 can be provided, such as... Figure 7 As shown, at least two eccentric structures 21 are provided, and each eccentric structure 21 is arranged at intervals along the first axis and shares a first motor to ensure the synchronization of each eccentric structure 21, so that the push plate 30 is subjected to uniform force. In other embodiments, a first motor may be provided for each eccentric structure 21.

[0062] For example, the first drive mechanism 20 includes a drive shaft 22, which is rotatably mounted on the smoke hood 10. An eccentric structure 21 is fixedly connected to the drive shaft 22, and a first motor drives the drive shaft 22 to rotate. Specifically, the drive shaft 22 is rotatably mounted on the support member 17. When two eccentric structures 21 share the first motor, the two eccentric structures 21 are fixed to the same drive shaft 22, and the extension length of the drive shaft 22 along the first axis can be set according to actual needs. The first motor can directly drive the drive shaft 22 to rotate, or it can drive the drive shaft 22 to rotate via a gear assembly.

[0063] In some embodiments, two sets of elastic components 40 are provided for each eccentric structure 21. The two sets of elastic components 40 are distributed on both sides of the first axis to ensure that the eccentric structure 21 is under stable force and that the push plate 30 is under balanced force.

[0064] See Figure 3 and Figure 8 The second drive mechanism 60 includes a second motor, a gear 61, and an arc-shaped rack 62. The gear 61 is mounted on the smoke hood 10 and connected to the second motor. The arc-shaped rack 62 is connected to the flap 50 and meshes with the gear 61. The second motor drives the gear 61 to rotate, which in turn drives the arc-shaped rack 62 to rotate, thereby rotating the flap 50. The meshing of the gear 61 and the arc-shaped rack 62 ensures precise and stable transmission.

[0065] A base 18 is fixedly mounted on the smoke hood 10. A gear 61 is rotatably connected to the base 18, and the base 18 is connected to the arc-shaped rack 62 via a guide assembly. Specifically, the gear 61 is mounted on a rotating shaft, which is rotatably connected to the base 18. A bearing can be installed between the rotating shaft and the base 18. The guide assembly provides support for the arc-shaped rack 62 and guides it, ensuring stable rotation of the arc-shaped rack 62.

[0066] In this embodiment, the guiding assembly includes a guide rod 71. One end of the guide rod 71 is rotatably connected to the base 18, and the other end is fixedly connected to the arc-shaped rack 62. During the rotation of the arc-shaped rack 62, the guide rod 71 rotates accordingly; that is, the rotation axes of the guide rod 71 and the arc-shaped rack 62 coincide. Because the gear 61 meshes with the arc-shaped rack 62, the gear 61 provides a certain supporting force to the arc-shaped rack 62. Combined with the support of the guide rod 71, this stabilizes the arc-shaped rack 62.

[0067] In this embodiment, the guide rod 71 is disposed on one side of the base 18, and the second motor is disposed on the other side of the base 18, so as to avoid structural interference and ensure a balanced layout.

[0068] See Figure 3 and Figure 9 When the range hood is off, the push plate 30 is in the first closed position, and the flip plate 50 is in the second closed position. The push plate 30 in the first closed position and the flip plate 50 in the second closed position are joined together to close the air inlet 101. When the range hood is turned on, the push plate 30 moves from the first closed position to the first open position, and at the same time, the flip plate 50 rotates from the second closed position to the second open position. The push plate 30 and the flip plate 50 work together to effectively improve the smoke extraction effect.

[0069] See Figures 10 to 13 During the operation of the range hood, the first motor drives the eccentric structure 21 to rotate around the first axis, so that the end of the eccentric structure 21 away from the first axis abuts against the surface of the push plate 30. As the eccentric structure 21 rotates, it pushes the push plate 30 to move along a straight line towards the lower side of the smoke collection hood 10. The direction of movement of the push plate 30 is perpendicular to its surface. The second motor drives the gear 61 to rotate, and the gear 61 drives the arc-shaped rack 62 to rotate, thereby causing the flip plate 50 to flip upward.

[0070] The push plate 30 moves not vertically downwards, but tilts downwards from back to front. This is because the air inlet 101 of the smoke hood 10 tilts downwards from front to back. Therefore, the push plate 30 moves downwards and forwards towards the smoke hood 10, which makes better use of the space.

[0071] The push plate 30 and the flip plate 50 are driven independently. In some embodiments, only the push plate 30 or only the flip plate 50 can be opened. In some embodiments, the push plate 30 and the flip plate 50 can be opened simultaneously or sequentially.

[0072] See Figure 10 and Figure 11During the opening of the push plate 30, the spring 41 is stretched, and the first link 42 and the second link 43 move away from each other to provide support for the spring 41. To avoid interference, the elastic component 40 avoids the rotation area of ​​the eccentric structure 21. The eccentric structure 21 and the elastic component 40 can be spaced apart along the first axis. During the closing of the range hood, the first motor drives the eccentric structure 21 to rotate, causing the eccentric structure 21 to move away from the push plate 30, and the push plate 30 returns to the first closed position under the elastic force of the spring 41.

[0073] See Figure 12 and Figure 13 During the opening of the flap 50, the second motor drives the gear 61 to rotate, which in turn drives the arc-shaped rack 62 to rotate, thereby causing the flap 50 to rotate. As the arc-shaped rack 62 rotates, the guide rod 71 rotates as well, and the support of the guide rod 71 on the arc-shaped rack 62 makes the arc-shaped rack 62 stable.

[0074] In some embodiments, a set of gears 61 and arc-shaped racks 62 are provided and located in the middle of the flap 50. In some embodiments, two or more sets of gears 61 and arc-shaped racks 62 may be provided, with each gear 61 sharing a second motor, so that the flap 50 is subjected to balanced force.

[0075] In other embodiments, the second drive mechanism 60 may include a push rod motor and a linkage structure. The push rod motor can drive the linkage structure to move. The linkage structure is connected to the flap 50 to realize the flap 50 flipping open or closed.

[0076] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A range hood, characterized in that, include: A smoke hood (10) is provided with an air inlet (101); A first driving mechanism (20) is disposed on the smoke collection hood (10). The first driving mechanism (20) includes a first motor and an eccentric structure (21). The first motor can drive the eccentric structure (21) to rotate around a first axis. The push plate (30) is capable of opening or closing at least part of the air inlet (101), and the eccentric structure (21) is capable of pushing the push plate (30) from the first closed position to the first open position when it rotates about the first axis; An elastic component (40) is disposed between the smoke hood (10) and the push plate (30). The elastic component (40) is used to apply a restoring force to the push plate (30) so that the push plate (30) moves from the first open position to the first closed position.

2. The range hood according to claim 1, characterized in that, The eccentric structure (21) is a cam, and the outer peripheral surface of the cam is an arc-shaped surface, which can abut against the push plate (30).

3. The range hood according to claim 2, characterized in that, The outer peripheral surface of the cam is recessed with a weight-reducing groove (211), and the end of the cam away from the first axis gradually narrows to form an arc-shaped guide portion (212).

4. The range hood according to claim 1, characterized in that, The elastic component (40) includes a spring (41) and a linkage assembly. One end of the spring (41) is connected to the smoke hood (10), and the other end of the spring (41) is connected to the push plate (30). The linkage assembly includes a first link (42) and a second link (43) that are hinged to each other. The end of the first link (42) away from the second link (43) is hinged to the smoke hood (10), and the end of the second link (43) away from the first link (42) is hinged to the push plate (30).

5. The range hood according to claim 4, characterized in that, The smoke collection hood (10) includes a hood body and a support member (17) disposed in the hood body. The eccentric structure (21) is rotatably connected to the support member (17). The spring (41) and the first connecting rod (42) are both connected to the support member (17). The support member (17) is provided with a guide groove (171), and the first connecting rod (42) is provided with a guide protrusion (44), which is slidably disposed in the guide groove (171).

6. The range hood according to claim 4, characterized in that, The elastic component (40) includes two sets of the connecting rods, which are distributed on both sides of the spring (41). The two first connecting rods (42) are hinged to the smoke hood (10) at the first hinge axis, and the two second connecting rods (43) are hinged to the push plate (30) at the second hinge axis.

7. The range hood according to claim 1, characterized in that, At least two eccentric structures (21) are provided, and each eccentric structure (21) is arranged at intervals along the first axis and shares the first motor.

8. The range hood according to claim 7, characterized in that, Two sets of elastic components (40) are provided for each of the eccentric structures (21), and the two sets of elastic components (40) are distributed on both sides of the first axis.

9. The range hood according to any one of claims 1-8, characterized in that, It also includes a flap (50) and a second drive mechanism (60). The flap (50) is disposed on the upper side of the push plate (30) and is rotatably connected to the smoke hood (10). The second drive mechanism (60) can drive the flap (50) to rotate between a second closed position and a second open position. The flap (50) in the second closed position and the push plate (30) in the first closed position can be spliced ​​together to close the air inlet (101).

10. The range hood according to claim 9, characterized in that, The second drive mechanism (60) includes a second motor, a gear (61) and an arc rack (62). The gear (61) is disposed on the smoke hood (10) and connected to the second motor. The arc rack (62) is connected to the flap (50) and meshes with the gear (61).

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