Range hood

Abstract

The utility model discloses a range hood which comprises an exhaust fume collecting hood, a smoke inlet is formed in the front side of the exhaust fume collecting hood, and the exhaust fume collecting hood comprises a top plate; the smoke baffle can open and close the smoke inlet; the moving mechanism connects the smoke barrier with the smoke collecting hood, the moving mechanism comprises a fixed support, a rocker for connecting the smoke barrier with the fixed support and a screw for fixing the fixed support on the inner side of the top plate, and the head of the screw penetrates through the top plate and is exposed out of the top plate; the range hood further comprises an anti-loosening device, the anti-loosening device comprises an electric screw driver, the electric screw driver can be arranged on the top plate in a lifting mode relative to the top plate, and the position of the electric screw driver corresponds to the position of the screw.

Description

Technical Field

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

[0002] Side-suction range hoods have become a mainstream feature of the market due to their robust smoke extraction capabilities. To enhance smoke collection, a smoke deflector is often installed. The motion mechanism that drives the deflector is a crucial component, closely tied to the user experience. However, after long-term use, the screws securing the motion mechanism can become loose, weakening the tightening effect. This can cause the deflector to vibrate abnormally or even fall off during opening or closing, severely impacting the user experience.

[0003] Currently, the anti-loosening structure of range hoods mainly focuses on the fan system, the mounting bracket, and the air hood. It is not suitable to directly apply the current anti-loosening structure to the motion mechanism. This is because the motion mechanism of the commonly used smoke baffle is a four-bar linkage, which is difficult to modify and prone to interference. It is not suitable for the anti-loosening structure of the fan part, such as those in Chinese patent application numbers 202220346401.2, 202220894308.5, and 202222159020.6. If the anti-loosening structure of the bracket, such as that in Chinese patent application number 202221445110.5, is applied to the motion mechanism, it will increase the difficulty of hinge installation, which is not in line with actual production conditions and reduces production efficiency.

[0004] Furthermore, existing anti-loosening mechanisms are typically simple, such as those disclosed in Chinese patent application numbers 201920115130.8, 202320250234.6, and 202223586326.6, which simply utilize anti-loosening nuts for connection. Even with anti-loosening nuts, repeated opening and closing of the smoke deflector can easily create a gap between the hinge fixing surface and the housing, causing the smoke deflector to wobble when opening and closing, affecting the user experience.

[0005] Therefore, there is room for further improvement. Utility Model Content

[0006] The technical problem to be solved by the present invention is to provide a range hood in view of the deficiencies in the above-mentioned prior art, which ensures that the fixing screws of the movement mechanism will not loosen after multiple opening and closing movements, thereby improving the user experience.

[0007] The technical solution adopted by the present invention to solve the above technical problems is: a range hood comprising:

[0008] A smoke collecting hood is provided with a smoke inlet on the front side thereof, and the smoke collecting hood includes a top plate;

[0009] Smoke dampers, which open and close the smoke inlet; and

[0010] A motion mechanism connects the smoke shield and the smoke hood, the motion mechanism comprising a fixing bracket, a rocker connecting the smoke shield and the fixing bracket, and a screw fixing the fixing bracket to the inner side of the top plate, the head of the screw passing through the top plate and exposed outside the top plate; characterized in that:

[0011] The range hood further comprises an anti-loosening device, which comprises an electric screwdriver. The electric screwdriver is arranged on the top plate so as to be able to be raised and lowered relative to the top plate, and the position of the electric screwdriver corresponds to that of the screw.

[0012] By setting up a liftable electric screwdriver, when it is determined that the screw is loose or needs to be tightened again, the screw can be lowered to the position of the screw, thereby tightening the screw again. Therefore, even if the motion mechanism drives the smoke shield to move open and close multiple times, the fixed screw will not loosen, thereby improving the user experience.

[0013] In order to facilitate the electric screwdriver to remain aligned with the screw when descending, the anti-loosening device also includes a guide device fixed on the top plate, and the guide device is provided with a guide hole for guiding the electric screwdriver.

[0014] To facilitate driving the electric screwdriver up and down, the anti-loosening device also includes a push rod, a fixed plate and a guide rail. The guide rail includes a first slide rail fixed relative to the top plate and a second slide rail that can slide up and down with the first slide rail. The fixed plate is fixed on the second slide rail, and the electric screwdriver is arranged on the fixed plate. The push rod is fixed on the first slide rail and is transmission-connected to the second slide rail.

[0015] In order to facilitate the setting of the push rod and the output of its power, the push rod is an electric push rod, which is fixed on the first slide rail through a fixed shaft, and the output end of the push rod is connected to the second slide rail through a transmission shaft.

[0016] Preferably, in order to automatically control the tightening action of the electric screwdriver, the electric screwdriver is a screwdriver with a built-in timer.

[0017] Preferably, in order to improve the fastening performance, the fixing bracket is provided with a countersunk hole for cooperating with a screw.

[0018] Preferably, there are two motion mechanisms, which are respectively arranged on the left and right sides of the smoke baffle, one of which serves as the active end and the other as the driven end, and the anti-loosening device is arranged corresponding to the active end.

[0019] Preferably, the smoke hood also includes a front panel, side panels and a back panel, the front panel and the back panel are arranged relative to each other front and back, the smoke inlet is opened on the front panel, the side panels are provided with two, one of the side panels is arranged between the left end portions of the front panel and the back panel, and the other side panel is arranged between the right end portions of the front panel and the back panel, and the top panel is arranged on the top of the front panel, the side panel and the back panel.

[0020] Compared with the existing technology, the advantage of the present invention is that: by providing a liftable electric screwdriver, when it is judged that the screw is loose or needs to be tightened again, the screw can be lowered to the position of the screw, thereby tightening the screw again. Therefore, even if the motion mechanism drives the smoke shield to move open and close multiple times, the fixed screw will not loosen, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of a range hood according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the exploded structure of the range hood according to an embodiment of the present utility model;

[0023] Figure 3 This is a schematic diagram of the exploded structure of the range hood according to an embodiment of the present invention (with the anti-loosening device hidden);

[0024] Figure 4 This is a schematic diagram of the smoke baffle and motion mechanism of the range hood according to an embodiment of the present invention (with screws hidden);

[0025] Figure 5 Schematic diagram of the anti-loosening device of the range hood according to an embodiment of the present utility model;

[0026] Figure 6 This is a schematic diagram of the exploded structure of the anti-loosening device of the range hood according to an embodiment of the utility model;

[0027] Figure 7 This is a schematic diagram of a fume hood of a range hood using the new embodiment. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below. 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.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 invention 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, features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0030] See also Figures 1 to 7 A range hood is a side-suction range hood, comprising a fume hood 1, a fan frame (not shown, same as the prior art) arranged on the fume hood 1, and a fan system (not shown, same as the prior art) arranged in the fan frame.

[0031] The smoke hood 1 includes a top panel 11, a front panel 12, side panels 13, and a back panel 14. When the range hood is normally installed, the front panel 12 is the side facing the user and is provided with a smoke inlet 121, while the back panel 14 is arranged opposite to the front panel 12 and is located on the side of the wall where the range hood is installed. The front panel 12 can be tilted relative to the back panel 14. There are two side panels 13, one of which is arranged between the left ends of the front panel 12 and the back panel 14, and the other side panel 13 is arranged between the right ends of the front panel 12 and the back panel 14. The top panel 11 is arranged on top of the above-mentioned front panel 12, side panels 13, and back panel 14. The top panel 11 is arranged independently, or it can be an integrally formed structure with the back panel 14 or the side panels 13.

[0032] The range hood also includes a smoke baffle 2 for opening and closing the smoke inlet 121, and a motion mechanism 3 connecting the smoke baffle 2 to the smoke hood 1. There are two motion mechanisms 3, one on the left and one on the right of the smoke baffle 2. One motion mechanism 3 serves as the active end, and the other as the passive end. Compared to the passive end, the active end's drive mechanism 3 also includes a drive device (not shown), such as an electric actuator.

[0033] Each motion mechanism 3 includes a fixed bracket 31, a rocker 32 and a screw 33. In this embodiment, there is only one rocker 32. Optionally, there may be multiple rockers 32 that are rotatably connected to each other or to the fixed bracket 31, as in the prior art. The fixed bracket 31 is fixed to the top plate 11 of the smoke hood 1 by screws 33. The rocker 32 is rotatably connected to the fixed bracket 31 and is fixedly connected to the side of the smoke baffle 2 facing the inside of the smoke hood 1. A countersunk hole 311 is provided on the fixed bracket 31 for cooperating with the screw 33. The head of the screw 33 passes through the top plate 11 and is exposed outside the top plate 11. Due to the presence of the countersunk hole 311, it is inconvenient to use a lock nut during production installation.

[0034] During the long-term opening and closing of the smoke baffle 2 by the movement mechanism 3 of the range hood, the screws 33 are easy to loosen, causing the fixing bracket 31 to loosen, which in turn causes the smoke baffle 2 to shake easily during the movement, not close tightly, or even fall off, seriously affecting the user experience. For this reason, the range hood also includes an anti-loosening device, which is provided corresponding to the active end. Of course, both movement mechanisms 3 can also have corresponding anti-loosening devices. The anti-loosening device includes an electric screwdriver 41, a push rod 42, a transmission shaft 43, a fixed plate 44, a guide rail 45, a guide device 46 and a fixed shaft 47. The guide rail 45 includes a first slide rail 451 and a second slide rail 452 that can slide up and down relative to each other, and the first slide rail 451 and the second slide rail 452 both extend up and down. The fixed plate 44 is fixed on the second slide rail 452, and it can be arranged at an angle to the second slide rail 452. The electric screwdriver 41 is provided on the fixed plate 44, and the guide device 46 is fixed on the top plate 11, located below the electric screwdriver 41. The guide device 46 has guide holes 461 positioned corresponding to the screws 33, which guide the path of the electric screwdriver 41. The first rail 451 can be fixed to the guide device 46 or the top plate 11. In this embodiment, there are two screws 33, and the electric screwdriver 41 also has two corresponding screws.

[0035] The push rod 42 is an electric push rod, which is fixed on the first slide rail 451 through a fixed shaft 47 . The output end of the push rod 42 is transmission-connected to the second slide rail 452 through a transmission shaft 43 .

[0036] The power supply and control of the anti-loosening device can be independent, or the control module of the existing range hood can be used.

[0037] After long-term use, screw 33 of a side-suction range hood will loosen. Different models of side-suction range hoods have different loosening cycles due to varying motion mechanism designs and loads. However, for the same model, the loosening cycles for screw 33 are roughly similar across batches. Therefore, a complete machine life test can be conducted to simulate long-term use and calibrate the loosening cycle T for screw 33. Screw 33 is then re-tightened after a time period of ±10% of T.

[0038] A timer (not shown) is provided in the electric screwdriver 41, which starts timing after the power is turned on for the first time in the user's home. When the range hood has been running for a cumulative time of T±10%, it is determined that the screw 33 is loose and needs to be retightened. At this time, the push rod 42 drives the second slide rail 452 to move downward, so that the head of the electric screwdriver 41 passes through the guide device 46 until it contacts the screw 33. After alignment, the electric screwdriver 41 rotates forward (assuming counterclockwise rotation for tightening) until it stops, so that the screw 33 is tightened again. After completion, the timer in the electric screwdriver 41 is reset and the timing starts again the next time the range hood is used. Of course, the range hood's own timer can also be used for timing, or manual timing can be used, or the electric screwdriver 41 can be started when the user deems it necessary.

Claims

1. A range hood comprising: A smoke collecting hood (1) is provided with a smoke inlet (121) on its front side, and the smoke collecting hood (1) includes a top plate (11); a smoke baffle (2) capable of opening and closing the smoke inlet (121); and A motion mechanism (3) connects the smoke shield (2) and the smoke collecting hood (1), the motion mechanism (3) comprising a fixing bracket (31), a rocker (32) connecting the smoke shield (2) and the fixing bracket (31), and a screw (33) fixing the fixing bracket (31) to the inner side of the top plate (11), the head of the screw (33) passing through the top plate (11) and exposed outside the top plate (11); characterized in that: The range hood further comprises an anti-loosening device, which comprises an electric screwdriver (41). The electric screwdriver (41) can be raised and lowered relative to the top plate (11) and is arranged on the top plate (11). The position of the electric screwdriver (41) corresponds to that of the screw (33).

2. The range hood according to claim 1, characterized in that: The anti-loosening device further comprises a guide device (46) fixed on the top plate (11), and a guide hole (461) for guiding the electric screwdriver (41) is provided on the guide device (46).

3. The range hood according to claim 1 or 2, characterized in that: The anti-loosening device further comprises a push rod (42), a fixed plate (44) and a guide rail (45); the guide rail (45) comprises a first slide rail (451) fixed relative to the top plate (11) and a second slide rail (452) capable of sliding up and down on the first slide rail (451); the fixed plate (44) is fixed on the second slide rail (452); the electric screwdriver (41) is arranged on the fixed plate (44); the push rod (42) is fixed on the first slide rail (451) and is in transmission connection with the second slide rail (452).

4. The range hood according to claim 3, characterized in that: The push rod (42) is an electric push rod, and the push rod (42) is fixedly arranged on the first slide rail (451) through a fixed shaft (47). The output end of the push rod (42) is transmission-connected to the second slide rail (452) through a transmission shaft (43).

5. The range hood according to claim 1 or 2, characterized in that: The electric screwdriver (41) is a screwdriver with a built-in timer.

6. The range hood according to claim 1 or 2, characterized in that: The fixing bracket (31) is provided with a sink hole (311) for cooperating with the screw (33).

7. The range hood according to claim 1 or 2, characterized in that: There are two motion mechanisms (3), which are respectively arranged on the left and right sides of the smoke baffle (2), one of which serves as the active end and the other as the driven end, and the anti-loosening device is arranged corresponding to the active end.

8. The range hood according to claim 1 or 2, characterized in that: The smoke hood (1) further comprises a front panel (12), a side panel (13) and a back panel (14); the front panel (12) and the back panel (14) are arranged relative to each other in front and back; the smoke inlet (121) is opened on the front panel (12); the side panels (13) have two, one of which is arranged between the left end portions of the front panel (12) and the back panel (14); and the other side panel (13) is arranged between the right end portions of the front panel (12) and the back panel (14); and the top panel (11) is arranged on top of the front panel (12), the side panels (13) and the back panel (14).

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