Near suction type range hood

Abstract

The utility model relates to a near-suction type range hood, which comprises a shell, an air inlet, an exhaust fan and a fan cover, the smoke baffle is rotationally connected to the machine shell in the mode that the smoke baffle can rotate front and back relative to the machine shell 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; the movement mechanism comprises a driving motor and a connecting rod assembly, the driving motor is arranged in the machine shell, the power input end of the connecting rod assembly is in transmission connection with an output shaft of the driving motor, and the connecting rod assembly can be driven by the driving motor to be unfolded and folded. The power output end of the connecting rod assembly is connected with the middle position of the smoke barrier in the left-right direction. The smoke barrier has the advantages that the motion synchronism of the left side and the right side of the smoke barrier can be guaranteed, and the step difference problem of the smoke barrier in a closed state is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, in particular to a close-suction range hood. Background Art

[0002] Existing side-suction range hoods usually have an air inlet on the panel. In order to prevent the air inlet from being exposed and not aesthetically pleasing when the range hood is not in operation and to increase the smoke collection area, a smoke baffle is provided at the air inlet. For example, a range hood with an automatically openable panel disclosed in the Chinese utility model patent application with application number CN201320529723.1 includes a housing, a fan system arranged in the housing, and an air inlet located at the front of the housing. The panel is hinged at the air inlet through a crank arm. A linkage mechanism driven by a motor is provided in the housing. The linkage mechanism includes a swing rod and a pull rod. One end of the swing rod and one end of the pull rod are hinged together, the other end of the swing rod is connected to the rotating shaft of the motor, and the other end of the pull rod is hinged to the crank arm. The pull rod makes a curve motion during the swing of the swing rod and drives the crank arm to swing, thereby driving the panel to open and close.

[0003] The range hood in the above patent application still has certain shortcomings: First, the panel (smoke baffle) of the existing close-suction range hood has 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 drive the smoke baffle to rotate. 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, resulting in inconsistency between the left and right hinges. Workers need to distinguish and identify them during production, which is prone to errors. Secondly, since the smoke baffle is equivalent to a cantilever beam after opening, the smoke baffle is prone to shaking when the range hood is running, causing discomfort to the user and reducing the user experience.

[0004] Therefore, the existing close-suction range hoods still need further improvement. Utility Model Content

[0005] The first technical problem to be solved by the utility model is to provide a close-suction range hood that can ensure the synchronization of the movements of the left and right sides of the smoke shield and thereby improve the step difference problem when the smoke shield is in a closed state, in view of the current status of the existing technology.

[0006] The second technical problem to be solved by the utility model is to provide a close-suction oil fume suction device with a smoke baffle that is more stable in an open state and reduces the shaking problem caused by operation in view of the current status of the prior art.

[0007] The technical solution adopted by the utility model to solve the first technical problem is: a close-suction range hood, comprising:

[0008] The casing has an air inlet on its front side wall;

[0009] A smoke baffle, rotatably connected to the housing in a manner that it can rotate forward and backward relative to the housing, and can open and close the air inlet;

[0010] A motion mechanism connected to the smoke baffle plate and driving the smoke baffle plate to deflect forward and backward;

[0011] The motion mechanism includes a drive motor and a connecting rod assembly. The drive motor is arranged in the casing. The power input end of the connecting rod assembly is transmission-connected to the output shaft of the drive motor and can be expanded and retracted under the drive of the drive motor. The power output end of the connecting rod assembly is connected to the middle position of the smoke shield in the left and right directions.

[0012] The motion mechanism used to drive the smoke damper to open and close has a connecting rod assembly whose power output end is connected to the middle position in the left and right directions of the smoke damper, ensuring the synchronization of the operation of both sides of the smoke damper and greatly reducing the risk of step difference.

[0013] In order to simplify the structure of the connecting rod assembly, the driving motor is arranged on the rear side wall of the casing, and the connecting rod assembly includes a first connecting rod and a second connecting rod. The first end of the first connecting rod is connected to the output shaft of the driving motor and can rotate around an axis extending left and right under the drive of the driving motor. The first end of the second connecting rod is rotatably connected to the second end of the first connecting rod, and the second end of the second connecting rod is rotatably connected to the back side of the smoke shield.

[0014] The technical solution adopted by the utility model to solve the second technical problem is: when the smoke shield is in the state of opening the air inlet, the first connecting rod and the second connecting rod extend on the same straight line. When the smoke shield is in the open state, the first connecting rod and the second connecting rod are in the same line, and a stable triangular structure is formed between the first connecting rod and the second connecting rod, the smoke shield and the housing, so as to prevent the smoke shield from shaking due to the operation of the range hood.

[0015] In order to further reduce the shaking problem of the smoke shield, the position where the back side of the smoke shield is rotatably connected to the second end of the second connecting rod is arranged lower.

[0016] In order to realize the rotational connection between the driving motor, the connecting rods of the connecting rod assembly and the smoke shield, the first connecting rod is plate-shaped as a whole, and has first flanges folded toward the same side on its left and right sides; the second connecting rod is plate-shaped as a whole, and has second flanges folded toward the same side on its left and right sides; the ends of the two first flanges of the first connecting rod are connected to the output shaft of the driving motor, and the other end has two support arms extending side by side, the two support arms are rotationally connected to the ends of the two second flanges of the second connecting rod, and the other ends of the two second flanges of the second connecting rod are rotationally connected to the back side of the smoke shield.

[0017] As an improvement, the main body of the first connecting rod has a first profile extending along its length, and the main body of the second connecting rod has a second profile extending along its length. The first connecting rod and the second connecting rod are both designed with profiles to ensure their strength and avoid deformation caused by pressure.

[0018] As an improvement, when the smoke shield is in the state of closing the air inlet, the first connecting rod extends vertically and abuts against the front side of the rear side wall of the housing, and the second connecting rod is perpendicular to the smoke shield. When the smoke shield is closed, the first connecting rod abuts against the rear side wall of the housing, which can make full use of the space in the housing, and the second connecting rod is substantially perpendicular to the smoke shield, which can tighten the smoke shield as much as possible, ensuring that both sides of the smoke shield are closed synchronously, further reducing the risk of step difference.

[0019] In order to avoid interference between the housing and the connecting rod assembly, when the smoke baffle is in a state of opening the air inlet, the connecting rod assembly passes through the air inlet and is connected to the smoke baffle.

[0020] In order to increase the range of the negative pressure zone and adapt to the connecting rod assembly set in the middle position, the air inlet on the front side wall of the casing includes a first air inlet located in the middle position in the left and right directions and a second air inlet symmetrically arranged about the first air inlet, and the connecting rod assembly passes through the first air inlet to be connected to the smoke shield.

[0021] In order to realize the rotational connection between the smoke shield and the housing, the top positions on the left and right sides of the back side of the smoke shield are both rotationally connected to the housing through hinge assemblies.

[0022] In order to simplify the structure of the hinge assembly, the hinge assembly includes a fixing frame and a U-shaped rocker, the fixing frame is arranged on the casing, the first end of the U-shaped rocker is rotatably connected to the fixing frame through a pin shaft, and the second end is connected to the back side of the smoke shield.

[0023] Compared with the prior art, the utility model has the following advantages: the motion mechanism used to drive the smoke damper to open and close, the power output end of the connecting rod assembly is connected to the middle position of the smoke damper in the left and right directions, ensuring the synchronization of the operation of the two sides of the smoke damper, and greatly improving the problem of step difference when the smoke damper is closed. When the smoke damper is fully opened, the first connecting rod and the second connecting rod of the connecting rod assembly are collinear, and a stable triangular structure is formed between the connecting rod assembly, the smoke damper, and the casing, which can prevent the smoke damper from shaking due to the operation of the range hood. In addition, the left and right hinge assemblies of the smoke damper can be unified into the same specifications, and workers do not need to distinguish and identify them during production, reducing the risk of errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1This is a three-dimensional structural schematic diagram of a range hood according to an embodiment of the utility model (the smoke baffle is in an open state);

[0025] Figure 2 A vertical cross-sectional view of the range hood according to an embodiment of the utility model cut along the front-to-back direction (the smoke baffle is in an open state);

[0026] Figure 3 A vertical cross-sectional view of the range hood according to an embodiment of the utility model cut along the front-to-back direction (the smoke baffle is in a closed state);

[0027] Figure 4 It is a three-dimensional structural schematic diagram of the moving mechanism and other components of the smoke baffle of the embodiment of the utility model;

[0028] Figure 5 It is a left view of the movement mechanism of the smoke baffle according to an embodiment of the utility model. DETAILED DESCRIPTION

[0029] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0030] 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.

[0031] Figure 1-Figure 5A preferred embodiment of the near-suction range hood of the utility model is shown. The range hood includes a housing 10 and a centrifugal fan 40 arranged in the housing 10. The housing 10 generally includes a fan frame 11 and a fume hood 12 arranged at the bottom of the fan frame 11. The inner cavity of the fan frame 11 is connected to the inner cavity of the fume hood 12. The front part of the fume hood 12 is an air inlet panel 120, which is tilted backward from top to bottom. An air inlet is provided on the air inlet panel 120, and external smoke can enter the fume hood 12 through the air inlet. The centrifugal fan 40 is arranged in the fan frame 11. When the centrifugal fan 40 is in operation, negative pressure is generated, and external oil smoke can be sucked into the fume hood 12 through the air inlet. An oil cup 13 is provided at the bottom of the fume hood 12. The oil cup 13 is in the shape of a long strip extending left and right, and is used to receive the oil stains flowing down from the fume hood 12. The front part of the smoke hood 12 is also provided with a smoke baffle 20 which can be deflected forward and backward relative to the smoke hood 12. The smoke baffle 20 is rotatably connected to the main body of the smoke hood 12 through a motion mechanism. Specifically, it can be deflected forward to open the above-mentioned air inlet and deflected backward to block and close the above-mentioned air inlet.

[0032] The top of the front side of the smoke hood 12 of this embodiment has a convex portion 123 that protrudes relatively forward, and the interior of the convex portion 123 defines an installation space for placing the control panel and lead wires of the range hood. The air inlet panel 120 of the smoke hood 12 is arranged below the convex portion 123. More specifically, three air inlets are provided on the air inlet panel 120, namely, a first air inlet 1201 located in the middle part (the middle part in the left-right direction) of the air inlet panel 120 and two second air inlets 1202 located on the left and right sides of the first air inlet 1201, and the two second air inlets 1202 are arranged symmetrically about the first air inlet 1201. Considering the avoidance of the connecting rod assembly of the motion mechanism, the opening of the first air inlet 1201 is slightly larger than the second air inlet 1202 on the left and right sides.

[0033] The top positions of the left and right sides of the back of the smoke shield 20 are rotatably connected to the housing 10 through hinge assemblies. Specifically, the hinge assembly includes a fixing frame 21 and a U-shaped rocker 22. The fixing frame 21 is located in the smoke hood 12 and is arranged on the top of the smoke hood 12. The first end of the U-shaped rocker 22 is rotatably connected to the fixing frame 21 through a pin shaft, and the second end is connected to a second bracket 232 arranged on the back of the smoke shield 20. Openings are correspondingly provided on the left and right sides of the air inlet panel 120 for the U-shaped rocker 22 to pass through. The left and right hinge assemblies of the smoke shield 20 can be unified into the same specifications, and workers do not need to distinguish and identify them during production, reducing the risk of errors.

[0034] The smoke damper 20 is driven by a motion mechanism disposed on the smoke hood 12 to deflect forward and backward relative to the smoke hood 12. The motion mechanism includes a drive motor 31 and a connecting rod assembly, wherein the drive motor 31 is disposed on the rear side wall of the smoke hood 12, and the connecting rod assembly includes a first connecting rod 32 and a second connecting rod 33, wherein the first end of the first connecting rod 32 is connected to the output shaft of the drive motor 31, and can rotate around an axis extending left and right under the drive of the drive motor 31, the first end of the second connecting rod 33 is rotationally connected to the second end of the first connecting rod 32, and the second end of the second connecting rod 33 is rotationally connected to the first bracket 231 on the back side of the smoke damper 20, and the first bracket 231 is located in the middle position of the left and right directions of the smoke damper 20, thereby ensuring the synchronization of the operation of the two sides of the smoke damper 20, and greatly reducing the risk of step difference. In order to further reduce the shaking problem of the smoke damper 20, the position where the back side of the smoke damper 20 is rotationally connected to the second end of the second connecting rod 33 is arranged lower.

[0035] See also Figure 2 When the smoke shield 20 is in the open air inlet state, the first connecting rod 32 and the second connecting rod 33 extend through the first air inlet 1201 and are connected to the smoke shield 20, and the first connecting rod 32 and the second connecting rod 33 extend on the same straight line. Since the first connecting rod 32 and the second connecting rod 33 are on the same line, a stable triangular structure is formed between the first connecting rod 32 and the second connecting rod 33, the smoke shield 20, and the housing 10, which can prevent the smoke shield 20 from shaking due to the operation of the range hood. Figure 3 When the smoke shield 20 is in the state of closing the air inlet, the first connecting rod 32 is substantially vertically extended and abuts against the front side of the rear side wall of the smoke hood 12, while the second connecting rod 33 is substantially perpendicular to the smoke shield 20. The first connecting rod 32 abuts against the rear side wall of the housing 10, which can make full use of the space in the housing 10, and the second connecting rod 33 is substantially perpendicular to the smoke shield 20, which can tighten the smoke shield 20 as much as possible, ensuring that both sides of the smoke shield 20 are closed synchronously, further reducing the risk of step difference.

[0036] The first connecting rod 32 is in the shape of a plate as a whole, and has first flanges 321 folded to the same side on its left and right sides. Similarly, the second connecting rod 33 is in the shape of a plate as a whole, and has second flanges 331 folded to the same side on its left and right sides. The ends of the two first flanges 321 of the first connecting rod 32 are connected to the output shaft of the driving motor 31, and the other end has two arms 323 extending side by side, and the extension direction of the two arms 323 is consistent with the extension direction of the main body of the first connecting rod 32. The ends of the two arms 323 are rotatably connected to the ends of the two second flanges 331 of the second connecting rod 33 through a pin, and the other ends of the two second flanges 331 of the second connecting rod 33 are rotatably connected to the first on the back of the smoke shield 20. In order to ensure the strength of the first connecting rod 32 and the second connecting rod 33 and avoid deformation under pressure, the middle part of the main body of the first connecting rod 32 has a first pressure profile 322 extending along its length direction, and the middle part of the main body of the second connecting rod 33 has a second pressure profile 332 extending along its length direction.

[0037] In this embodiment, the motion mechanism used to drive the smoke damper 20 to open and close has a power output end of the connecting rod assembly connected to the middle position of the smoke damper 20 in the left and right directions, which ensures the synchronization of the operation of the two sides of the smoke damper 20 and greatly reduces the risk of step difference when the smoke damper 20 is closed. When the smoke damper 20 is fully opened, the first connecting rod 32 and the second connecting rod 33 of the connecting rod assembly are in line, and a stable triangular structure is formed between the connecting rod assembly, the smoke damper 20, and the housing 10, which can prevent the smoke damper 20 from shaking due to the operation of the range hood. In addition, the left and right hinge assemblies of the smoke damper 20 can be unified into the same specifications, and workers do not need to distinguish and identify them during production, reducing the risk of errors.

Claims

1. A close-suction range hood, comprising: The casing (10) has an air inlet on its front side wall; A smoke baffle (20) is rotatably connected to the housing (10) so as to be rotatable forward and backward relative to the housing (10) and capable of opening and closing the air inlet; A motion mechanism connected to the smoke baffle (20) and driving the smoke baffle (20) to deflect forward and backward; The feature is that the motion mechanism comprises a drive motor (31) and a connecting rod assembly, the drive motor (31) is arranged in the housing (10), the power input end of the connecting rod assembly is connected to the output shaft of the drive motor (31) by transmission, and can be expanded and retracted under the drive of the drive motor (31), and the power output end of the connecting rod assembly is connected to the middle position of the smoke baffle (20) in the left and right directions.

2. The close-suction range hood according to claim 1, characterized in that: The driving motor (31) is arranged on the rear side wall of the casing (10), and the connecting rod assembly includes a first connecting rod (32) and a second connecting rod (33), the first end of the first connecting rod (32) is connected to the output shaft of the driving motor (31), and can rotate around an axis extending left and right under the drive of the driving motor (31), the first end of the second connecting rod (33) is rotatably connected to the second end of the first connecting rod (32), and the second end of the second connecting rod (33) is rotatably connected to the back side of the smoke baffle (20).

3. The close-suction range hood according to claim 2, characterized in that: When the smoke baffle (20) is in an open air inlet state, the first connecting rod (32) and the second connecting rod (33) extend on the same straight line.

4. The close-suction range hood according to claim 2, characterized in that: The position at which the back side of the smoke baffle (20) is rotatably connected to the second end of the second connecting rod (33) is arranged at a lower position.

5. The close-suction range hood according to claim 2, characterized in that: The first connecting rod (32) is in the shape of a plate as a whole, and has first flanges (321) folded toward the same side on its left and right sides; the second connecting rod (33) is in the shape of a plate as a whole, and has second flanges (331) folded toward the same side on its left and right sides; the ends of the two first flanges (321) of the first connecting rod (32) are connected to the output shaft of the drive motor (31), and the other end has two supporting arms (323) extending side by side; the two supporting arms (323) are rotatably connected to the ends of the two second flanges (331) of the second connecting rod (33); the other ends of the two second flanges (331) of the second connecting rod (33) are rotatably connected to the back side of the smoke shield (20).

6. The close-suction range hood according to claim 5, characterized in that: The main body of the first connecting rod (32) has a first pressure profile (322) extending along its length direction, and the main body of the second connecting rod (33) has a second pressure profile (332) extending along its length direction.

7. The close-suction range hood according to claim 2, characterized in that: When the smoke baffle (20) is in a state of closing the air inlet, the first connecting rod (32) extends vertically and abuts against the front side of the rear side wall of the casing (10), and the second connecting rod (33) is perpendicular to the smoke baffle (20).

8. The close-suction range hood according to any one of claims 1 to 7, characterized in that: When the smoke baffle (20) is in a state where the air inlet is opened, the connecting rod assembly passes through the air inlet and is connected to the smoke baffle (20).

9. The close-suction range hood according to claim 8, characterized in that: The air inlet on the front side wall of the casing (10) comprises a first air inlet (1201) located in the middle position in the left-right direction and a second air inlet (1202) arranged symmetrically with respect to the first air inlet (1201), and the connecting rod assembly passes through the first air inlet (1201) and is connected to the smoke baffle (20).

10. The close-suction range hood according to any one of claims 1 to 7, characterized in that: The top positions of the left and right sides of the back side of the smoke baffle (20) are rotatably connected to the housing (10) via hinge assemblies.

11. The close-suction range hood according to claim 10, characterized in that: The hinge assembly comprises a fixing frame (21) and a U-shaped rocker (22), wherein the fixing frame (21) is arranged on the housing (10), a first end of the U-shaped rocker (22) is rotatably connected to the fixing frame (21) via a pin, and a second end is connected to the back side of a smoke baffle (20).

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