Installation structure of lift-type range hood

Abstract

This invention relates to an installation structure for a liftable range hood, used to mount the range hood to a wall. The range hood includes a fan frame and a smoke collection hood. The smoke collection hood is connected to the fan frame in a manner that allows it to slide relative to the fan frame in the vertical direction. The rear side wall of the smoke collection hood is provided with rollers for abutting against the wall and for rolling up and down along the wall. The installation structure includes a mounting bracket mounted on the wall. The fan frame is connected to the mounting bracket via a connecting part on its rear side wall. The rear side wall of the fan frame also has an upwardly extending extension wall that is opposite to the mounting bracket in the front-rear direction. A distance adjustment mechanism is provided between the extension wall and the mounting bracket. This distance adjustment mechanism changes the distance between the extension wall and the mounting bracket, thereby changing the force exerted by the rollers on the smoke collection hood on the wall. The height of the adjustment mechanism is higher than the height of the connecting part of the fan frame. This installation structure effectively prevents damage to the wall from the smoke collection hood during lifting and lowering.

Description

Technical Field

[0001] This invention relates to the field of range hood technology, and in particular to an installation structure for a lift-type range hood. Background Technology

[0002] A range hood is a kitchen appliance used to purify the kitchen environment. To ensure effective smoke extraction during operation and an aesthetically pleasing appearance when off, a type of range hood with a height-adjustable air intake (i.e., smoke hood) has been developed. This type of range hood typically includes a fan frame and a smoke hood, connected by a slide rail and a screw-nut mechanism. The fan frame is fixedly mounted on the wall, and a motor drives the screw-nut to rotate, thus controlling the raising and lowering of the smoke hood. When the range hood is not in operation, the smoke hood rises to its highest position; when the range hood is in operation, the smoke hood lowers to the set height. Furthermore, casters are installed on the back of the smoke hood for rolling between walls during raising and lowering, thereby reducing resistance.

[0003] However, existing lift-up range hoods still have certain shortcomings. In overseas markets, such as American households, kitchen walls are mostly made of plasterboard. When the rollers on the back of the range hood roll up and down against the plasterboard wall, the pressure exerted by the range hood's main body on the wall causes two grooves to be pressed into the wall by the rollers. This greatly reduces the user experience. Common solutions to this problem include increasing the thickness or number of rollers to increase the contact area between the rollers and the wall, thus distributing the pressure more evenly. However, this does not fundamentally solve the problem.

[0004] Therefore, existing lift-type range hoods still need further improvement. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an installation structure for a liftable range hood that can effectively prevent damage to the wall during the lifting and lowering of the range hood's smoke collection hood, in light of the current state of the technology.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: a lifting range hood installation structure for mounting the range hood to a wall. The range hood includes a fan frame and a smoke collection hood. The smoke collection hood is connected to the fan frame in a manner that allows it to slide relative to the fan frame in the vertical direction. The rear side wall of the smoke collection hood is provided with rollers for abutting against the wall and for rolling up and down along the wall. The installation structure includes a mounting bracket mounted on the wall. The fan frame is connected to the mounting bracket through a connecting part on its rear side wall. The rear side wall of the fan frame also has an extension wall that extends upward and is opposite to the mounting bracket in the front-back direction. A spacing adjustment mechanism is provided between the extension wall and the mounting bracket. This spacing adjustment mechanism changes the force exerted by the rollers on the smoke collection hood on the wall by adjusting the distance between the extension wall and the mounting bracket. The height of the adjustment mechanism is higher than the height of the connecting part of the fan frame.

[0007] To simplify the structure of the spacing adjustment mechanism, the mounting bracket has a first connecting hole that runs through the front and back, and the extension wall has a second connecting hole that runs through the front and back. The spacing adjustment mechanism includes a bolt that passes through the first connecting hole and the second connecting hole, and a nut that is threadedly engaged with the bolt. The nut is connected to the first end of the bolt and abuts against the outer periphery of the second connecting hole on the side away from the mounting bracket. The second end of the bolt has a radially outwardly protruding limiting stop that abuts against the outer periphery of the first connecting hole on the side away from the extension wall.

[0008] Generally, the spacing adjustment mechanism can be adjusted manually. However, since the pressure of the rollers on the wall varies at different heights of the smoke hood, manual adjustment cannot effectively and specifically match the height of the smoke hood. Therefore, in order to automatically match the height of the smoke hood, an automatic adjustment device is also included. This automatic adjustment device can act on the bolt and drive the bolt to rotate forward and backward around its own axis, thereby adjusting the spacing between the extension wall and the mounting bracket to a distance that is suitable for the height of the smoke hood.

[0009] To further simplify the structure of the automatic adjustment device, the automatic adjustment device includes:

[0010] A gear is coaxially connected to the bolt and rotates together with the bolt.

[0011] A rack extends vertically and is positioned on the extended wall in a manner that allows it to move up and down. The rack meshes with the gear and drives the gear to rotate when it moves up and down.

[0012] The transmission rod extends vertically, with its upper end connected to the rack and its lower end connected to the smoke hood.

[0013] It is conceivable that the automatic adjustment device could be controlled by a separate drive motor, which could adjust the bolts based on the height information of the smoke hood (which could be achieved by setting a position sensor).

[0014] To ensure the stability of the rack's upward and downward sliding relative to the fan frame, the rack is connected to the extended wall via a vertically extending linear guide assembly.

[0015] In order to match the lifting height of the smoke collection hood, the rear side wall of the smoke collection hood is also provided with a slide rail extending vertically and a slider sliding in the slide rail, and the lower end of the transmission rod is connected to the slider.

[0016] Since the transmission rod and the rack are not on a strictly vertical straight line, in order to avoid interference between the transmission rod and the rack during up-down movement, the upper end of the transmission rod and the lower end of the rack are rotatably connected in a manner that allows them to rotate around an axis extending left and right.

[0017] To ensure that the spacing adjustment mechanism is more controllable, the smoke hood is fitted outside the fan frame, and the rear side wall of the fan frame is located adjacent to the rear side wall of the smoke hood.

[0018] To ensure the stability of the smoke collection hood's vertical movement, the rollers are located at the bottom of the rear side wall of the smoke collection hood, and at least two are arranged at intervals in the left-right direction.

[0019] As an improvement, the mounting bracket has hooks extending obliquely upwards, and the rear side wall of the fan frame has hanging holes for the hooks to be held in. These hanging holes constitute the connecting part of the fan frame. This connection method of hanging holes and hooks also allows the fan frame to achieve a certain angle of deflection in the front-back direction with the location of the hooks as a fulcrum.

[0020] Compared with the prior art, the advantages of the present invention are: the spacing adjustment mechanism between the mounting bracket and the fan bracket can change the force exerted on the wall by the rollers on the smoke hood through the lever principle, that is, by balancing the pressure, the rollers of the smoke hood are prevented from damaging the wall when the smoke hood is raised and lowered, while not affecting the raising and lowering speed or the noise during raising and lowering, thus improving the user experience. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of a lift-up range hood according to an embodiment of the present invention;

[0022] Figure 2 This is a three-dimensional structural diagram of the lifting range hood according to another embodiment of the present invention (the mounting bracket is omitted);

[0023] Figure 3 This is an enlarged view of a portion of the structure of a lift-up range hood according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the forces acting on a lifting range hood mounted on a mounting frame according to an embodiment of the present invention;

[0025] Figure 5 This is a vertical sectional view of the upper part of the lifting range hood according to an embodiment of the present invention, cut along the front-to-back direction;

[0026] Figure 6 This is a rear view of a portion of the wind turbine frame structure according to an embodiment of the present invention;

[0027] Figure 7 This is a vertical sectional view of the lifting range hood according to an embodiment of the present invention, cut along the front-to-back direction (the smoke collection hood is in the retracted state);

[0028] Figure 8 This is a vertical sectional view of the lifting range hood of the present invention, cut along the front-to-back direction (the smoke collection hood is in the open state). Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0030] The specification and claims of this invention use terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," to describe various exemplary structural parts and elements of the invention. However, these terms are used herein merely for ease of explanation and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this invention can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0031] Figures 1-8 This illustration shows a preferred embodiment of the present invention, an installation structure for a liftable range hood, used to mount the range hood to a wall. The range hood includes a fan frame 10 and a smoke collection hood 20. The installation structure includes a mounting bracket 30 mounted on the wall, and the fan frame 10 is connected to the mounting bracket 30 via a connecting portion on its rear side wall. The mounting bracket 30 has two hooks 32 extending obliquely upwards, spaced apart in the left-right direction. Correspondingly, the rear side wall of the fan frame 10 has two hanging holes 12 for the hooks 32 to be held, also spaced apart in the left-right direction. The hanging holes 12 constitute the connecting portion of the fan frame 10 in this embodiment.

[0032] See Figure 1 In this embodiment, the smoke hood 20 is connected to the fan frame 10 in a manner that allows it to slide relative to the fan frame 10 in the vertical direction. Specifically, the cross-sectional dimension of the smoke hood 20 in the horizontal direction is larger than that of the fan frame 10 in the horizontal direction, and the smoke hood 20 is fitted over the fan frame 10. The smoke hood 20 has a receiving chamber with an opening at the top, and when the smoke hood 20 moves vertically relative to the fan frame 10, the fan frame 10 can pass through the opening at the top and enter or exit the receiving chamber of the smoke hood 20. More specifically, the rear sidewall of the fan frame 10 is disposed adjacent to the rear sidewall of the smoke hood 20, that is, the distance from the rear sidewall of the fan frame 10 and the rear sidewall of the smoke hood 20 to the wall is not much different.

[0033] The smoke hood 20 can be driven by conventional motion mechanisms in the prior art (such as the lead screw slider 220 motion mechanism) to move up and down relative to the fan frame 10, which will not be described in detail here.

[0034] The rear side wall of the smoke hood 20 is provided with rollers 21 for abutting against the wall and rolling up and down along the wall. There are two rollers 21 arranged alternately in the left and right direction. Both rollers 21 are located at the bottom of the rear side wall of the smoke hood 20. By using multiple rollers 21 to support the wall, the stability of the smoke hood 20 in moving up and down can be ensured.

[0035] The pressure of the roller 21 on the wall is generated by the torque of gravity on the support point of the range hood hook 32. When the smoke hood 20 moves up and down, the position of the overall center of gravity of the range hood also changes with the rise and fall of the smoke hood 20. Specifically, the pressure of the roller 21 on the wall gradually increases as the smoke hood 20 rises. That is to say, the pressure of the roller 21 on the wall is different at different heights of the smoke hood 20. In the existing technology, increasing the thickness or number of rollers 21 cannot automatically adjust the contact area according to the pressure change.

[0036] See Figure 5The rear side wall of the fan frame 10 also has an upwardly extending extension wall 11 that is opposite to the mounting frame in the front-rear direction. This extension wall 11 can be made of a high-strength reinforcing plate structure to prevent deformation. A spacing adjustment mechanism 40 is also provided between the extension wall 11 and the mounting frame 30. Specifically, the mounting frame 30 has a front-to-back through first connecting hole 31, and the extension wall 11 has a front-to-back through second connecting hole 110, which are opposite to each other in the front-to-back direction. The spacing adjustment mechanism 40 includes a bolt 41 and a nut 42, wherein the bolt 41 passes through the first connecting hole 31 and the second connecting hole 110. The nut 42 is connected to the first end of the bolt 41 and abuts against the outer periphery of the second connecting hole 110 on the side away from the mounting frame 30, while the second end of the bolt 41 has a radially outwardly protruding limiting stop 411, which abuts against the outer periphery of the first connecting hole 31 on the side away from the extension wall 11. On the extension wall 11 of the fan frame 10, a limiting groove 111 is provided at the location of the second connecting hole 110 for inserting the nut 42. The shape of the limiting groove 111 is consistent with the shape of the nut 42. After the nut 42 is inserted into the limiting groove 111, the rotation of the nut 42 (with the bolt 41) can be restricted.

[0037] See Figure 7 and Figure 8 The bolt 41 of the spacing adjustment mechanism 40 can be driven and adjusted by an automatic adjustment device. Specifically, the automatic adjustment device includes a gear 51, a rack 52, and a transmission rod 53. The gear 51 is coaxially connected to the bolt 41 and rotates together with the bolt 41. The rack 52 extends vertically and is limited on the extension wall 11 in a way that allows it to move up and down. The extension wall 11 has a vertically extending mounting groove, and a vertically extending linear guide assembly 13 extends from the inner wall of the mounting groove. The rack 52 is mounted on the linear guide assembly, thereby ensuring the stability of the rack 52's upward and downward sliding relative to the fan frame 10. The rack 52 meshes with the gear 51, and when the rack 52 moves up and down, it can drive the gear 51 to rotate.

[0038] In this embodiment, the location of the mounting hole 12 of the wind turbine frame 10 corresponds to the fulcrum M of the lever, and the height of the adjusting mechanism is higher than the height of the connecting part of the wind turbine frame 10. Specifically, see... Figure 4 After bolts 41 and nuts 42 are tightened, a tensile force F is applied to the extension wall 11 of the fan frame 10. L1 The range hood as a whole is considered as a lever, with the fulcrum being the location of the range hood hook 32. A force F is generated perpendicular to the wall and outward at the bottom roller 21 of the smoke collection hood 20. L2 This balances the pressure Fq exerted on the wall by the bottom roller 21 of the smoke hood 20. The pressure F is controlled by changing the screwing distance of the nut 42 and bolt 41. L1The size can balance the pressure of roller 21 on the wall. Fq-F L2 This ensures that the device remains within the set range, guaranteeing smooth and reliable lifting while preventing it from slipping on the wall.

[0039] The transmission rod 53 extends vertically, with its upper end rotatably connected to the lower part of the rack 52 and its lower end connected to the smoke hood 20. The axis of rotation between the upper end of the transmission rod 53 and the lower part of the rack 52 extends in the left-right direction. To match the lifting height of the smoke hood 20, the rear side wall of the smoke hood 20 is also provided with a vertically extending slide rail 22 and a slider 220 slidably disposed in the slide rail 22, and the lower end of the transmission rod 53 is connected to the slider 220. When the smoke hood 20 moves up and down, the power is transmitted to the bolt 41 through the transmission rod 53, rack 52, and gear 51, causing the bolt 41 to rotate forward and backward around its own axis. When the bolt 41 rotates forward and backward, the distance between the extension wall 11 and the mounting bracket 30 changes accordingly because the nut 42 is fixed. This changes the force exerted by the roller 21 on the smoke hood 20 on the wall, ensuring that the force exerted by the roller 21 on the wall is always within a relatively reasonable range, preventing grooves or dents from being caused by excessive force exerted by the roller 21 on the wall, thus improving the user experience.

[0040] The working process of the lift-up range hood in this embodiment is as follows:

[0041] When the smoke hood 20 rises from its lowest position, the working process is divided into two stages. In the first stage, the smoke hood 20 rises, and the slider 220 connected to the pull rod slides in the slide groove while the pull rod remains stationary. When the smoke hood 20 rises to the set position, the slider 220 moves to the bottom limit position of the slide 22. When the slider 220 contacts the bottom of the slide 22, the second stage begins. After entering the second stage, the smoke hood 20 continues to rise and pushes the pull rod to rise continuously. The pull rod pushes the rack 52 to rise, causing the gear 51 and bolt 41 to rotate. Since the nut 42 cannot rotate, the tightening distance will continue to increase, and the tension FL1 acting on the extension wall 11 will increase. In this way, the force of the roller 21 on the smoke hood 20 acting on the wall is reduced accordingly, thus avoiding the formation of dents on the wall. Similarly, the process of lowering and opening the smoke hood 20 when it is at its highest position is also the same. The working process is divided into two stages. In the first stage, the smoke hood 20 lowers and the slider 220 connected to the pull rod slides in the slide groove. The pull rod does not move. When the smoke hood 20 lowers to the set position, the slider 220 moves to the top limit position of the slide 22. When the slider 220 contacts the top of the slide 22, the second stage begins. After entering the second stage, the smoke hood 20 continues to lower and pushes the pull rod to move down continuously. The pull rod pushes the rack 52 down, causing the gear 51 and bolt 41 to rotate in the opposite direction. Since the nut 42 cannot rotate, the tightening distance is reduced, and the tension FL1 acting on the extension wall 11 decreases. In this way, the force of the roller 21 on the smoke hood 20 acting on the wall increases accordingly to ensure that the roller 21 is always in contact with the wall and the applied pressure is within an appropriate range.

Claims

1. A mounting structure for a liftable range hood, used to mount the range hood to a wall, the range hood including a fan frame (10) and a smoke collection hood (20), the smoke collection hood (20) being connected to the fan frame (10) in a manner that allows it to slide relative to the fan frame (10) in the vertical direction, the rear side wall of the smoke collection hood (20) being provided with rollers (21) for abutting against the wall and being able to roll up and down along the wall, the mounting structure including a mounting bracket (30) mounted on the wall, the fan frame (10) being connected to the mounting bracket (30) through a connecting part on its rear side wall, characterized in that: The rear side wall of the fan frame (10) also has an upwardly extending extension wall (11) that is opposite to the mounting frame in the front-rear direction. A spacing adjustment mechanism (40) is provided between the extension wall (11) and the mounting frame (30). The spacing adjustment mechanism (40) changes the force of the roller (21) on the smoke hood (20) acting on the wall by adjusting the distance between the extension wall (11) and the mounting frame (30). The height of the spacing adjustment mechanism is higher than the height of the connection part of the fan frame (10). The mounting bracket (30) has a first connecting hole (31) that runs through the front and back, and the extension wall (11) has a second connecting hole (110) that runs through the front and back. The spacing adjustment mechanism (40) includes a bolt (41) that passes through the first connecting hole (31) and the second connecting hole (110) and a nut (42) that is threadedly engaged with the bolt (41). The nut (42) is connected to the first end of the bolt (41) and abuts against the side of the outer periphery of the second connecting hole (110) away from the mounting bracket (30). The second end of the bolt (41) has a radially outward protruding limiting stop (411) that abuts against the side of the outer periphery of the first connecting hole (31) away from the extension wall (11).

2. The installation structure of the lift-type range hood according to claim 1, characterized in that: It also includes an automatic adjustment device that can act on the bolt (41) and drive the bolt (41) to rotate forward and backward around its own axis, thereby adjusting the distance between the extension wall (11) and the mounting bracket (30) to a distance that matches the height of the smoke hood (20).

3. The installation structure of the lift-type range hood according to claim 2, characterized in that: The automatic adjustment device includes: The gear (51) is coaxially connected to the bolt (41) and rotates together with the bolt (41); A rack (52) extends vertically and is positioned on the extension wall (11) in a way that allows it to move up and down. The rack (52) meshes with the gear (51) and drives the gear (51) to rotate when it moves up and down. The transmission rod (53) extends vertically, with its upper end connected to the rack (52) and its lower end connected to the smoke hood (20).

4. The installation structure of the lift-type range hood according to claim 3, characterized in that: The rack (52) is connected to the extension wall (11) via a vertically extending linear guide assembly (13).

5. The installation structure of the lift-type range hood according to claim 3, characterized in that: The rear side wall of the smoke hood (20) is also provided with a slide rail (22) extending vertically and a slider (220) slidably disposed in the slide rail (22), and the lower end of the transmission rod (53) is connected to the slider (220).

6. The installation structure of the lifting range hood according to claim 3, characterized in that: The upper end of the transmission rod (53) is rotatably connected to the lower end of the rack (52) in a manner that allows it to rotate about an axis extending to the left and right.

7. The installation structure of the lift-type range hood according to any one of claims 1 to 6, characterized in that: The smoke hood (20) is fitted outside the fan frame (10), and the rear side wall of the fan frame (10) is disposed adjacent to the rear side wall of the smoke hood (20).

8. The installation structure of the lift-type range hood according to any one of claims 1 to 6, characterized in that: The rollers (21) are located at the bottom of the rear side wall of the smoke hood (20), and at least two are arranged sequentially at intervals in the left-right direction.

9. The installation structure of the lift-type range hood according to any one of claims 1 to 6, characterized in that: The mounting bracket (30) has hooks (32) extending obliquely upwards, and the rear side wall of the fan frame (10) has hanging holes (12) for the hooks (32) to be held therein. The hanging holes (12) constitute the connecting part of the fan frame (10).

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