Range hood

Abstract

The utility model relates to a range hood, which comprises a casing, an air inlet, an air outlet and a fan, the smoke baffle is rotationally connected to the machine shell through a hinge and can open and close the air inlet; the movement mechanism is connected with the smoke barrier and drives the smoke barrier to deflect front and back; an auxiliary tensioning mechanism is further arranged in the machine shell and comprises a rocker and an elastic piece, the rocker can rotate around the axis extending leftwards and rightwards, and the elastic piece acts on the first end of the rocker and enables the second end of the rocker to have the tendency of deflecting forwards and upwards all the time. The smoke barrier is provided with a hinge, the outer peripheral edge of the hinge is provided with a concave positioning concave part, and in the rotating process of the smoke barrier, the second end of the rocker is in sliding contact with the outer peripheral edge of the hinge and can be clamped into the positioning concave part when the smoke barrier is in a closed state. The smoke barrier has the advantage that the problem that the product fineness is affected due to untight closing of the smoke barrier can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, in particular to a range hood. Background Art

[0002] Existing side-suction range hoods usually have an air inlet on the panel. In order to avoid the air inlet being exposed and not aesthetically pleasing when the range hood is not working and to increase the smoke collection area, a smoke baffle is provided at the air inlet. For example, the Chinese utility model patent application with application number CN201320529723.1 discloses such a range hood. The smoke baffle of a traditional close-suction range hood is a driving end at one end and a driven end at the other end. The driving end and the driven end are arranged on the left and right sides. The driving end is driven by a driving mechanism to rotate the smoke baffle. Since the left and right sides are not running synchronously, a step difference is generated after the smoke baffle is closed, causing quality problems. On the other hand, due to the asynchronous operation of the left and right sides, the design will choose to make design compensation on the hinge of the driven end during the design, resulting in inconsistency between the left and right hinges. During production, workers need to distinguish and identify them, which is prone to errors. There is also a method of setting the driving end for driving the smoke baffle to deflect in the middle position of the left and right directions of the smoke baffle to improve the problem of loose closing of the driven end of the smoke baffle. However, setting the driving end in the middle position of the smoke baffle will inevitably affect the installation of other components in the casing, resulting in interference problems.

[0003] Therefore, the existing close-suction range hoods need further improvement. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a range hood which can effectively improve the problem that the product refinement is affected by the loose closure of the smoke baffle plate in view of the current status of the prior art.

[0005] The technical solution adopted by the utility model to solve the above technical problems is: a range hood, comprising:

[0006] The casing has an air inlet on its front side wall;

[0007] A smoke baffle, rotatably connected to the housing via a hinge, and capable of opening and closing the air inlet;

[0008] A motion mechanism connected to the smoke baffle plate and driving the smoke baffle plate to deflect forward and backward;

[0009] An auxiliary tensioning mechanism is also provided in the casing, and the auxiliary tensioning mechanism includes a rocker arm that can rotate around an axis extending left and right and an elastic member. The elastic member acts on the first end of the rocker arm and makes the second end of the rocker arm always have a tendency to deflect forward and upward. The outer peripheral edge of the hinge has an inwardly concave positioning recess. During the rotation of the smoke shield, the second end of the rocker arm slides in contact with the outer peripheral edge of the hinge and can be inserted into the positioning recess when the smoke shield is in a closed state.

[0010] The elastic member can adopt various existing technologies and may include various elastic elements such as compression springs, torsion springs, and spring leaves. However, in order to better cooperate with the above-mentioned rocker deflection action, the elastic member is a tension spring, the first end of which is fixed on the casing, and the second end is connected to the first end of the rocker.

[0011] As an improvement, the rocker is rotatably connected to the casing via pins extending left and right.

[0012] In order to ensure that the hinge of the smoke shield can always be in contact with the second end of the rocker and slide smoothly relative to each other during the forward and backward rotation, the hinge as a whole is a vertically extending U-shaped plate structure, and the outer edge is an arc-shaped edge, and the positioning recess is an arc-shaped recess, the rocker is also a strip plate structure, and the second end of the rocker has an arc-shaped flange that matches the arc-shaped recess.

[0013] In order to avoid the hinge movement, the front side wall of the housing is also provided with a clearance opening for the hinge to pass through.

[0014] In order to avoid interference with other components in the housing, the auxiliary tensioning mechanism is located on the left side or the right side of the housing.

[0015] Considering that when the motion mechanism is driven on the left or right side of the smoke shield, the warping problem on the other side is more obvious, in order to adapt to this, the motion mechanism and the auxiliary tensioning mechanism are respectively located on the left and right sides of the casing.

[0016] In order to facilitate the installation of the auxiliary tensioning mechanism, the housing includes a left wall and a right wall opposite to each other, and the auxiliary tensioning mechanism is arranged adjacent to the left wall or the right wall of the housing.

[0017] As an improvement, the front side wall of the casing is inclined from top to bottom and backward, and the smoke baffle is also inclined from top to bottom and backward in a closed state.

[0018] As an improvement, an oil cup for receiving oil is also provided at the bottom of the casing.

[0019] Compared with the prior art, the advantages of the utility model are as follows: an auxiliary tensioning mechanism is provided in the housing, and the auxiliary tensioning mechanism uses the elastic member and the rocker to cooperate to apply a certain force to the hinge when the smoke shield is closed, wherein the positioning recess on the hinge cooperates with the second end of the rocker to ensure that when the smoke shield is close to the closed state, the elastic member provides additional auxiliary closing force, thereby avoiding the problem of one side of the smoke shield tilting up, making the closed states of the left and right sides of the smoke shield tend to be consistent, and improving the refinement of the product. The above-mentioned auxiliary tensioning mechanism uses a simple structure to solve the disadvantages of the unilaterally driven smoke shield, reducing the optimization cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a three-dimensional structural schematic diagram of a range hood according to an embodiment of the utility model (only the fume collecting hood is shown, and components such as the fan frame and the centrifugal fan are omitted);

[0021] Figure 2 This is a three-dimensional structural schematic diagram of the range hood of the utility model embodiment from another angle (only the fume hood is shown, and components such as the fan frame and the centrifugal fan are omitted);

[0022] Figure 3 A vertical cross-sectional view of the smoke collecting hood of the range hood according to the embodiment of the utility model cut along the front-to-back direction (the smoke baffle is in the open state);

[0023] Figure 4 It is a vertical cross-sectional view of the smoke collecting hood of the range hood according to the embodiment of the utility model cut along the front-to-back direction (the smoke baffle is in the closed state). DETAILED DESCRIPTION

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0025] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations 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.

[0026] Figure 1-Figure 4A preferred embodiment of the range hood of the utility model is shown. The range hood includes a casing 10 and a centrifugal fan arranged in the casing 10. The casing 10 generally includes a fan frame and a smoke hood arranged at the bottom of the fan frame. The inner cavity of the fan frame is connected to the inner cavity of the smoke hood. An air inlet 110 is provided on the front side wall 11 of the smoke hood, and external smoke can enter the smoke hood through the air inlet 110. The centrifugal fan is arranged in the fan frame. When the centrifugal fan is in operation, negative pressure is generated, and external oil smoke can be sucked into the smoke hood through the air inlet 110. An oil cup 15 is provided at the bottom of the smoke hood. The oil cup 15 is in the shape of a long strip extending left and right, and is used to receive oil stains flowing down from the smoke hood. The front part of the smoke hood is also provided with a smoke baffle 14 which can be deflected forward and backward relative to the smoke hood. The smoke baffle 14 is connected to the main body of the smoke hood through a hinge motion mechanism 20. The hinge motion mechanism 20 generally includes a drive motor 21 and a hinge mechanism 22. Driven by the hinge motion mechanism 20, the smoke baffle 14 can be deflected forward to open the above-mentioned air inlet 110 and deflected backward to block and close the above-mentioned air inlet 110. Generally, the hinge motion mechanism 20 is arranged as an active end on one of the left and right sides of the smoke hood, and only a conventional hinge mechanism is arranged on the other side, that is, as a driven end.

[0027] The front side wall 11 of the smoke hood of this embodiment is tilted backward from top to bottom, wherein the smoke baffle 14 is also tilted backward from top to bottom in the closed state. An auxiliary tensioning mechanism is also provided in the housing 10, and the auxiliary tensioning mechanism and the above-mentioned movement mechanism 20 are respectively located on the left and right sides of the smoke hood, that is, the auxiliary tensioning mechanism and the above-mentioned driven end are on the same side. The smoke hood includes a left side wall 12 and a right side wall 13 opposite to each other, and the auxiliary tensioning mechanism is provided adjacent to the left side wall 12 or the right side wall 13 of the housing 10. Figure 1 and Figure 2 As shown, the auxiliary tensioning mechanism and the hinge mechanism as the driven end are located on the right side of the smoke collecting hood, while the movement mechanism 20 is located on the left side of the smoke collecting hood.

[0028] The auxiliary tensioning mechanism includes a rocker 31 that can rotate around an axis extending left and right, and an elastic member 32. The rocker 31 is a strip plate structure as a whole, and the middle part of the rocker 31 is rotatably connected to the right side wall 13 of the smoke hood through a pin shaft 33 extending left and right. The elastic member 32 is a tension spring, one end of which is connected to the first end of the rocker 31, and the other end is connected to a fixed column 34 on the right side wall 13 of the smoke hood. The tension spring is always in a stretched state, and the second end of the rocker 31 is against the outer peripheral edge 350 of the hinge 35. Under the elastic force of the tension spring, the rocker 31 always has a tension along the Figure 3 The tendency of deflection in the S1 direction shown in FIG. 1 , that is, the second end of the rocker 31 always has a tendency to deflect forward and upward.

[0029] The hinge 35 at the driven end is a vertically extending U-shaped plate structure. One end of the hinge 35 is connected to a fixed bracket 36 provided on the inner wall of the smoke hood through a rotating shaft extending left and right. The fixed bracket 36 is located above the air inlet 110. The other end of the hinge 35 is connected to the smoke plate bracket 141 on the back of the smoke baffle 14. The overall profile of the hinge 35 is fan-shaped, and its outer peripheral edge 350 is an arc edge. During the forward and backward rotation of the smoke baffle 14, the outer peripheral edge 350 of the hinge 35 and the second end of the rocker 31 can always be in contact and slide smoothly relative to each other. The sliding contact between the two is a line contact. Therefore, the resistance is relatively small and will not hinder the movement of the smoke baffle 14. The outer peripheral edge 350 of the hinge 35 also has an inwardly concave positioning recess 3501. During the closing and rotation process of the smoke damper 14, the second end of the rocker arm 31 slides along the outer peripheral edge 350 of the hinge 35, and is correspondingly inserted into the positioning recess 3501 of the hinge 35 when the smoke damper 14 is closed to the extreme position. At this time, the tension spring can provide additional auxiliary closing force, that is, the second end of the rocker arm 31 is inserted into the positioning recess 3501, which will apply a certain force to the hinge 35 in an inclined upward direction to close the smoke damper 14 on this side, thereby ensuring that the closed states of the left and right sides of the smoke damper 14 are consistent, thereby improving the refinement of the product.

[0030] When the smoke shield 14 is opened, in order to allow the second end of the rocker 31 to smoothly escape from the positioning recess 3501 of the hinge 35, in this embodiment, the positioning recess 3501 on the hinge 35 is designed as an arc-shaped recess with a certain curvature, and correspondingly, the second end of the rocker 31 is designed as an arc-shaped flange 310 adapted to the arc-shaped recess. In this way, when the smoke shield 14 is opened, the hinge 35 rotates accordingly, driving the rocker 31 to overcome the elastic force of the tension spring and move along the Figure 4 The S2 direction shown in the figure is slightly deflected, so that the second end of the rocker 31 is disengaged from the arc-shaped notch of the hinge 35 and continues to slide in contact with the outer peripheral edge 350 of the hinge 35, and there will be no problem of being stuck and unable to open.

[0031] The front side wall 11 of the housing 10 also has a clearance opening 111 for the hinge 35 to pass through.

[0032] The range hood of this embodiment is provided with an auxiliary tensioning mechanism in the housing 10, which can apply a certain force to the hinge 35 when the smoke baffle 14 is closed by using the elastic member 32 in cooperation with the rocker 31, wherein the positioning recess 3501 on the hinge 35 cooperates with the second end of the rocker 31 to ensure that when the smoke baffle 14 is close to the closed state, the elastic member 32 provides an additional auxiliary closing force, thereby avoiding the problem of one side of the smoke baffle 14 tilting up, making the closed states of the left and right sides of the smoke baffle 14 tend to be consistent, and improving the refinement of the product. The above-mentioned auxiliary tensioning mechanism uses a simple structure to solve the disadvantages of driving the smoke baffle 14 on one side, reducing the optimization cost.

Claims

1. A range hood, comprising: The casing (10) has an air inlet (110) formed on its front side wall (11); A smoke baffle (14) is rotatably connected to the housing (10) via a hinge (35) and is capable of opening and closing the air inlet (110); A motion mechanism (20) connected to the smoke baffle (14) and driving the smoke baffle (14) to deflect forward and backward; The characterizing feature is that an auxiliary tensioning mechanism is also provided in the casing (10), and the auxiliary tensioning mechanism comprises a rocker (31) which can rotate around an axis extending left and right and an elastic member (32), wherein the elastic member (32) acts on the first end of the rocker (31) and makes the second end of the rocker (31) always have a tendency to deflect forward and upward, and an outer peripheral edge (350) of the hinge (35) has an inwardly concave positioning recess (3501), and during the rotation of the smoke baffle (14), the second end of the rocker (31) slides in contact with the outer peripheral edge (350) of the hinge (35), and can be inserted into the positioning recess (3501) when the smoke baffle (14) is in a closed state.

2. The range hood according to claim 1, characterized in that: The elastic member (32) is a tension spring, a first end of which is fixed to the housing (10), and a second end of which is connected to the first end of the rocker (31).

3. The range hood according to claim 1, characterized in that: The rocker (31) is rotatably connected to the housing (10) via a pin shaft (33) extending leftward and rightward.

4. The range hood according to claim 1, characterized in that: The hinge (35) is a vertically extending U-shaped plate structure as a whole, and the outer peripheral edge (350) is an arc-shaped edge, and the positioning recess (3501) is an arc-shaped recess. The rocker (31) is also a strip plate structure, and the second end of the rocker (31) has an arc-shaped flange (310) adapted to the arc-shaped recess.

5. The range hood according to claim 1, characterized in that: The front side wall (11) of the housing (10) is also provided with a clearance opening (111) for the hinge (35) to pass through.

6. The range hood according to any one of claims 1 to 5, characterized in that: The auxiliary tensioning mechanism is located on the left side or the right side of the housing (10).

7. The range hood according to claim 6, characterized in that: The movement mechanism (20) and the auxiliary tensioning mechanism are respectively located on the left and right sides of the housing (10).

8. The range hood according to claim 6, characterized in that: The housing (10) comprises a left side wall (12) and a right side wall (13) which are opposite to each other, and the auxiliary tensioning mechanism is arranged adjacent to the left side wall (12) or the right side wall (13) of the housing (10).

9. The range hood according to any one of claims 1 to 5, characterized in that: The front side wall (11) of the casing (10) is inclined from top to bottom and backward, and the smoke baffle (14) is also inclined from top to bottom and backward in a closed state.

10. The range hood according to any one of claims 1 to 5, characterized in that: The bottom of the casing (10) is also provided with an oil cup (15) for receiving oil.

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