Sealing assembly and range hood applying same

Abstract

The utility model discloses a sealing assembly and a range hood applying the sealing assembly, the sealing assembly comprises a sealing strip assembly used for being arranged between an external fixed part and a movable part, the movable part can move relative to the fixed part, and the sealing strip assembly comprises a sealing strip used for abutting against the movable part; the fastener is used for connecting the sealing strip assembly to the fixing part; the sealing strip can move between the fixed part and the movable part along the fastener; the sealing assembly further comprises an elastic piece, and the elastic piece enables the sealing strip to keep the tendency of abutting against the lower box body.

Description

Technical Field

[0001] The utility model relates to an oil fume purification device, in particular to a sealing component and an oil fume extractor using the sealing component. Background Art

[0002] As users' requirements for the appearance and usage environment of kitchen range hoods increase, liftable range hoods descend when needed and retract when turned off, which can greatly free up countertop space and make it easier for users to clean. Therefore, they have been increasingly widely used.

[0003] A lifting range hood generally includes an upper box assembly and a lower box assembly. The upper box assembly contains a range hood fan assembly, left and right mounting rails, and a motor-controlled worm to rotate and drive the nut buckle to move up and down; the lower box assembly is installed with a connecting plate, the middle of the connecting plate is fixed to the nut buckle on the upper box, the upper box motor controls the rotation of the worm, and the nut buckle drives the lower box assembly to move up and down. A range hood disclosed in a Chinese patent with application number 202120687386.3 of the applicant includes an air outlet body, an air inlet body at least partially located below the air outlet body, and a motion mechanism, the air outlet body includes a fan frame and a fan cover arranged outside the fan frame, the motion mechanism includes a linear drive module for driving the air inlet body to rise and fall relative to the air outlet body, and the air inlet body is wrapped around the outer periphery of the air outlet body.

[0004] In the above-mentioned existing lifting range hood, the upper box needs to cooperate with the lower box to ensure smooth lifting and sealing. For example, a range hood disclosed in the Chinese patent application number 202110831651.5 of the applicant solves the sealing problem between the upper and lower boxes of the lifting range hood by designing a fixed sealing strip. However, the connection position between the lower box assembly and the upper box is at the back. Due to the weight of the lower box itself and the assembly error, a gap of varying degrees will be formed between the front side of the upper box and the lower box. When the gap is large, the air intake here causes the main air inlet of the range hood to release pressure, resulting in a small amount of air intake at the main air inlet, which affects the oil fume extraction effect of the range hood. Because the air intake at the gap will also cause the range hood to make a lot of noise, or even produce abnormal sounds.

[0005] The conventional practice is to reduce the designed gap between the front sealing gasket set on the front side of the upper box and the lower box. However, because the gap status here is inconsistent in batches of range hoods, the design value is difficult to adjust. Too small a gap may cause large interference between the front sealing strip and the lower box, resulting in severe wear of the sealing strip.

[0006] Therefore, there is room for further improvement. Utility Model Content

[0007] The first technical problem to be solved by the utility model is to provide a sealing assembly capable of adjusting the position of the sealing strip to ensure the sealing performance in view of the deficiencies in the above-mentioned prior art.

[0008] The second technical problem to be solved by the utility model is to provide a range hood using the above sealing assembly.

[0009] The technical solution adopted by the utility model to solve the above-mentioned first technical problem is: a sealing component, comprising:

[0010] A sealing strip assembly, used to be arranged between an external fixed component and a movable component, the movable component can move relative to the fixed component, and the sealing strip assembly includes a sealing strip used to abut against the movable component;

[0011] A fastener for connecting the sealing strip assembly to the fixing component; characterized in that:

[0012] The sealing strip can move between the fixed component and the movable component along the fastener;

[0013] The sealing assembly further comprises an elastic member, which enables the sealing strip to maintain a tendency to abut against the lower box body.

[0014] By setting fasteners and elastic parts, the position of the sealing strip can be moved, so that the position of the sealing strip can be automatically adjusted according to the size of the gap between the fixed part and the movable part, so that the sealing strip can contact the movable part under different gap conditions to form a better sealing state, thereby ensuring the good sealing performance of the sealing assembly.

[0015] Furthermore, the sealing strip assembly also includes a first sealing strip support and a second sealing strip support, and the sealing strip is clamped between the first sealing strip support and the second sealing strip support, thereby clamping the sealing strip by the two supports, so that the sealing strip assembly moves as a whole, avoiding the sealing strip from moving out of place due to deformation.

[0016] Furthermore, to facilitate the fixation between each sealing strip support member and the sealing strip, the first sealing strip support member and the second sealing strip support member are clamped and fixed, so that the first sealing strip support member, the second sealing strip support member and the sealing strip are integrated.

[0017] Preferably, a hook is provided on the second sealing strip support member, and a slot is provided on the first sealing strip support member, and the hook passes through the sealing strip and the slot and is engaged with the edge of the slot.

[0018] To facilitate the fastener to connect the sealing strip assembly with the fixing component, a first positioning hole is provided on the first sealing strip support component, a second positioning hole is provided on the second sealing strip support component, and a third positioning hole is provided on the sealing strip. The positions of the first positioning hole, the second positioning hole and the third positioning hole correspond to each other, and the fastener passes through the first positioning hole, the third positioning hole and the second positioning hole in sequence, thereby being fixed to the fixing component.

[0019] Preferably, in order to facilitate targeted adjustment of the sealing strip assembly according to the uneven gap at different positions in the length direction, there are at least two first positioning holes and they are arranged at intervals along the length direction of the first sealing strip support member, and the number of the second positioning holes and the third positioning holes are the same as the first positioning holes.

[0020] The technical solution adopted by the utility model to solve the second technical problem is: a range hood, characterized in that: the sealing component as described above is applied.

[0021] Furthermore, the range hood includes an upper box body as the fixed part and a lower box body as the movable part, the lower box body is at least partially located below the upper box body and at least partially covers the outer periphery of the upper box body, the lower box body can be raised and lowered relative to the upper box body, the upper box body has a front side wall, and the sealing assembly is at least arranged between the front side wall and the lower box body, thereby better solving the problem of noise and abnormal sound of the range hood caused by uneven and difficult to adjust gaps between the upper and lower boxes.

[0022] Furthermore, in order to ensure that the air inlet channel in the upper box body is not affected by the sealing assembly, a groove recessed toward the interior of the upper box body is provided at the bottom of the front side wall of the upper box body, and the elastic member of the sealing assembly is at least partially provided in the groove, one end of the elastic member abuts against the bottom wall of the groove, and the other end of the elastic member abuts against the second sealing strip support member of the sealing strip assembly, and the fastener passes through the bottom wall of the groove and is fixed to the bottom wall.

[0023] Preferably, the fastener is a step screw, which includes a head, a step portion and a tail portion in the axial direction, the outer diameter of the head portion is larger than the outer diameter of the step portion, the head portion abuts against the side of the first sealing strip support away from the sealing strip, the tail portion passes through the bottom wall of the groove and enters the interior of the upper box body, and the step portion is located between the head portion and the tail portion. Thus, the fastener itself can be positioned by the step portion.

[0024] Furthermore, to ensure the movement of the sealing strip assembly relative to the fastener, the height of the step portion is H2, the height of the groove is H1, and H2>H1 is satisfied.

[0025] Furthermore, a flange extending toward the lower box body is provided at the bottom of the front side wall of the upper box body, and the gap width between the bottom of the sealing strip assembly and the flange is d, and the value range of d is 0.2 to 0.5 mm, so that there will be no air leakage between the bottom of the sealing strip assembly and the upper box body, and a better sealing state is formed between the upper and lower box body assemblies.

[0026] Compared with the prior art, the utility model has the advantages that: by setting fasteners and elastic parts, the position of the sealing strip can be moved, so that the position of the sealing strip can be automatically adjusted according to the gap size between the fixed part and the movable part, so that the sealing strip can contact the movable part under different gap conditions, forming a better sealing state, ensuring the good sealing performance of the sealing component. When the sealing component is applied to a range hood, especially a lifting type range hood, it can form a better sealing state between the upper and lower box parts, and better solve the problem of noise and abnormal sound of the range hood caused by uneven and difficult adjustment of the gap between the upper and lower boxes. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of a range hood according to an embodiment of the utility model (viewed from front to back);

[0028] Figure 2 A schematic diagram of a range hood according to an embodiment of the utility model (viewed from the back to the front);

[0029] Figure 3 A schematic diagram of a range hood with a hidden lower box and a fume collecting hood according to an embodiment of the utility model;

[0030] Figure 4 It is a cross-sectional view (front-to-back cross-section) of a range hood according to an embodiment of the utility model;

[0031] Figure 5 for Figure 4 A schematic diagram of the partial enlargement of Ⅰ;

[0032] Figure 6 It is a schematic diagram of a sealing strip assembly of a range hood according to an embodiment of the utility model;

[0033] Figure 7 This is a schematic diagram of the exploded structure of the sealing strip assembly of the range hood according to an embodiment of the utility model;

[0034] Figure 8 It is a schematic diagram of the front side wall of the upper box body of the range hood according to an embodiment of the utility model. DETAILED DESCRIPTION

[0035] Embodiments of the present utility model are described in detail below, and 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.

[0036] In the description of the present utility model, 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 the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 utility model 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, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0037] See also Figure 1 to Figure 4 A range hood includes an upper housing 1, a lower housing 2, a fan system 3 disposed in the upper housing 1, and a motion mechanism for driving the lower housing 2 to rise and fall relative to the upper housing 1. The fan system 3 is a centrifugal fan, the axis of which extends in the front-to-back direction, and the fan system 3 at least includes a first suction port 31 facing the rear side, and optionally, the fan system 3 may also include a second suction port 32 facing the front side.

[0038] The lower box body 2 is at least partially located below the upper box body 1 and at least partially covers the outer periphery of the upper box body 1, so that when the lower box body 2 is raised or lowered relative to the upper box body 1, oil leakage at the gap between the upper box body 1 and the lower box body 2 can be avoided. An air inlet 21 is provided at the bottom of the lower box body 2.

[0039] The motion mechanism includes a motor 41 and a screw rod 42. The motor 41 can be fixedly arranged on the top of the upper box body 1, while the screw rod 42 extends up and down and is rotatably arranged in the upper box body 1. The screw rod 42 can be driven by the motor 41 to rotate around its own axis. The lower box body 2 can be directly or indirectly threadedly connected to the screw rod 42. For example, a nut buckle (not shown) can be fixed on the lower box body 2. The motor 41, the screw rod 42 and the nut buckle constitute a driving mechanism in the form of a linear drive module. The nut buckle is sleeved on the screw rod 42 and is threadedly connected to the screw rod 42. Therefore, when the screw rod 42 rotates, the nut buckle drives the lower box body 2 to rise and fall. In order to ensure the stable operation of the lower box body 2, a guide rail assembly 44 can usually be arranged on the left and right sides of the upper box body 1 and the lower box body 2. The above-mentioned method of driving the lower box body 2 to rise and fall can adopt the existing technology, which will not be repeated here.

[0040] In order to prevent a pressure relief gap from forming between the upper box body 1 and the lower box body 2 when the two move relative to each other, the range hood further includes a sealing component. Figure 3 to Figure 7The sealing assembly includes a sealing strip assembly 51, an elastic member 52 and a fastener 53. The sealing strip assembly 51 includes a first sealing strip support member 511, a second sealing strip support member 512 and a sealing strip 513. The first sealing strip support member 511, the second sealing strip support member 512 and the sealing strip 513 can all be in the shape of long strips. The sealing strip 513 is clamped between the first sealing strip support member 511 and the second sealing strip support member 512. A hook 514 is provided on the second sealing strip support member 512, which passes through the sealing strip 513 and the first sealing strip support member 511 (a hole can be opened on the sealing strip 511 for the hook 514 to pass through). A card slot 515 is provided on the first sealing strip support 511, and a hook 514 passes through the card slot 515 and is engaged with the edge of the card slot 515. The hook 514 can preferably be L-shaped, so that the second sealing strip support 511 and the first sealing strip support 511 are connected and fixed, thereby making the first sealing strip support 511, the second sealing strip support 512 and the sealing strip 513 form a whole, so that the sealing strip assembly 51 can maintain a fixed shape and move.

[0041] The first sealing strip support 511 is provided with a first positioning hole 516, the second sealing strip support 512 is provided with a second positioning hole 517, and the sealing strip 513 is provided with a third positioning hole 518. The positions of the first positioning hole 516, the second positioning hole 517 and the third positioning hole 518 correspond to each other. The number of the first positioning holes 516 can be at least two, and they are arranged at intervals along the length direction of the first sealing strip support 511, such as three in this embodiment, and are evenly spaced. The number and spacing of the second positioning holes 517 and the third positioning holes 518 are the same as those of the first positioning holes 516.

[0042] The above-mentioned sealing strip assembly 51 is arranged on the outer wall of the upper box body 1, and has at least one set of sealing strip assembly 51, which is arranged on the front side wall 11 of the upper box body 1, the second sealing strip support 512 is close to the upper box body 1, and the first sealing strip support 511 is close to the inner wall of the lower box body 2, the sealing strip 513 is roughly U-shaped, and it opens to one side of the lower box body 2, and the first sealing strip support 511 is arranged inside the opening of the sealing strip 513, so that the sealing strip 513 can contact and fit tightly with the lower box body 2 (the two ends of the U-shape are in contact with the lower box body 2). Alternatively, the sealing strip 513 does not necessarily have to be U-shaped, as long as the part thereof that exceeds the first sealing strip support 511 can abut against the lower box body 2. Optionally, the sealing strip assembly 51 can be arranged on the left, right and front side walls of the upper box body 1.

[0043] See also Figure 5 and Figure 8On the outer wall of the upper box body 1 corresponding to the sealing strip assembly 51, such as the bottom of the front side wall 11, a groove 12 is provided which is recessed toward the interior of the upper box body 1. The elastic member 52 of the sealing assembly is at least partially disposed in the groove 12, and the size of the groove 12 is adapted to the elastic member 52 to radially position the elastic member 52 (the bottom wall 121 of the groove 12 abuts against one end of the elastic member 52). Preferably, the elastic member 52 is a compression spring. The other end of the elastic member 52 away from the groove 12 abuts against the second sealing strip support member 512 of the sealing strip assembly 51, and abuts against the side of the second sealing strip support member 512 away from the sealing strip 513.

[0044] The fastener 53 of the sealing assembly mentioned above connects the sealing strip assembly 51 to the upper box body 1, and has a certain degree of freedom of movement only between the front side wall 11 of the upper box body 1 and the lower box body 2, that is, it has a certain degree of freedom of movement in the front and rear directions. It can pass through the first positioning hole 516 on the first sealing strip support 511, the third positioning hole 518 on the sealing strip 513 and the second positioning hole 517 on the second sealing strip support 512 in sequence, and then penetrate into the groove 12, and finally partially pass through the bottom wall 121 of the groove 12 and be threadedly connected to the bottom wall 121 of the groove 12 for fixation. The fastener 53 can be a pin, a screw, etc., and the preferred fastener 53 is a step screw, which ensures that it is installed in place by its own step. The elastic member 52 is arranged around the outer periphery of the fastener 53. The bottom wall 121 of the above-mentioned groove 12 refers to the side of the groove 12 away from the second sealing strip support 512. Figure 5 It is shown with reference numeral 121 in FIG.

[0045] Since the sealing strip assembly 51 is arranged in the gap between the upper box body 1 and the lower box body 2, if it occupies a large space inside the upper box body 1, it will affect the air intake area of ​​the range hood itself. Therefore, in the prior art, a groove 12 is arranged at the position where the sealing strip is fixed to accommodate the elastic member 52, which greatly retains the original air intake channel of the range hood and does not affect the oil fume extraction effect. In addition, since three first positioning holes 516 (three second positioning holes 517 and three third positioning holes 518 are also arranged), and each first positioning hole 516 is correspondingly provided with an independent elastic member 52 and a fastener 53, even when the left and right gaps between the front side wall 11 of the upper box body 1 and the lower box body 2 are uneven, they can be independently adjusted at their respective corresponding positions.

[0046] The fastener 53 is a step screw, which includes a head 531, a step 532 and a tail 533 in the axial direction, wherein the outer diameter of the head 531 is larger than the outer diameter of the step 532, and the head 531 abuts against the side of the first sealing strip support 511 away from the sealing strip 513, and the tail 533 passes through the bottom wall 121 of the groove 12 and enters the interior of the upper box body 1, and the step 532 is located between the head 531 and the tail 533. The height of the step 532 (the axial dimension of the fastener 53) is H2, and the height of the groove 12 (the axial dimension of the fastener 53) is H1, and H2>H1 is satisfied, thereby enabling the sealing strip assembly 51 to move forward and backward. The size of each positioning hole on the sealing strip assembly 51 is matched with the clearance of the fastener 53, and the sealing strip assembly 51 can move forward and backward smoothly along the fastener 53. The height of the step 532 of the fastener 53 is used to locate the initial position and movement stroke of the sealing pad assembly 51.

[0047] When the gap between the sealing strip 513 on the upper case 1 and the lower case 2 is large, the sealing strip assembly 51 is moved forward by the elastic member 52, so that the front side of the sealing strip 513 contacts the lower case 2 to form a seal, and the maximum movement position of the sealing strip assembly 51 is the position where the first sealing strip support member 511 presses against the head 531 of the fastener 53. When the gap between the sealing strip 513 on the upper case 1 and the lower case 2 is small, the lower case 2 pushes the sealing strip assembly 51 to move backward, and the elastic member 52 contracts. In order to make the sealing strip assembly 51 at the maximum movement position backward to be able to stick to the front side wall 11 of the upper case 1, the head 531 of the fastener 53 and the lower case 2 have a minimum gap L2, and the maximum movable distance of the sealing strip 513 is L1, L2>L1, otherwise the lower case 2 and the fastener 53 will interfere.

[0048] A small gap is arranged between the bottom of the sealing strip assembly 51 and the flange 13 at the bottom of the front side wall 11 of the upper box body 1 (formed by bending the bottom of the front side wall 11 toward the lower box body 2). The gap width is d, and the preferred value range of d is 0.2 to 0.5 mm, so that there will be no air leakage between the bottom of the sealing strip assembly 51 and the upper box body 1, and a better sealing state is formed between the upper and lower box body assemblies.

[0049] In the above description, the sealing assembly is arranged between the upper box body 1 and the lower box body 2. Optionally, the sealing assembly can also be arranged between other fixed parts and movable parts of the range hood that need to ensure sealing, such as an air inlet box body that can be raised and lowered relative to the smoke hood, a baffle that can be translated left and right relative to the smoke hood, etc.

Claims

1. A sealing assembly comprising: A sealing strip assembly (51) is used to be arranged between an external fixed component and a movable component, the movable component being movable relative to the fixed component, the sealing strip assembly (51) comprising a sealing strip (513) for abutting against the movable component; A fastener (53) for connecting the sealing strip assembly (51) to the fixing component; characterized in that: The sealing strip (513) can move along the fastener (53) between the fixed component and the movable component; The sealing assembly further comprises an elastic member (52), wherein the elastic member (52) enables the sealing strip (513) to maintain a tendency to abut against the lower box body (2).

2. The sealing assembly according to claim 1, characterized in that: The sealing strip assembly (51) further comprises a first sealing strip support member (511) and a second sealing strip support member (512), and the sealing strip (513) is clamped between the first sealing strip support member (511) and the second sealing strip support member (512).

3. The sealing assembly according to claim 2, characterized in that: The first sealing strip support member (511) and the second sealing strip support member (512) are clamped and fixed, so that the first sealing strip support member (511), the second sealing strip support member (512) and the sealing strip (513) are formed into one body.

4. The sealing assembly according to claim 3, characterized in that: The second sealing strip support member (512) is provided with a hook (514), the first sealing strip support member (511) is provided with a slot (515), and the hook (514) passes through the sealing strip (513) and the slot (515) and is engaged with the edge of the slot (515).

5. The sealing assembly according to claim 2, characterized in that: The first sealing strip support member (511) is provided with a first positioning hole (516), the second sealing strip support member (512) is provided with a second positioning hole (517), and the sealing strip (513) is provided with a third positioning hole (518). The positions of the first positioning hole (516), the second positioning hole (517) and the third positioning hole (518) correspond to each other, and the fastener (53) passes through the first positioning hole (516), the third positioning hole (518) and the second positioning hole (517) in sequence, so as to be fixed to the fixing component.

6. The sealing assembly according to claim 5, characterized in that: There are at least two first positioning holes (516) which are arranged at intervals along the length direction of the first sealing strip support member (511); the number of the second positioning holes (517) and the third positioning holes (518) are the same as the number of the first positioning holes (516).

7. A range hood, characterized in that: A sealing assembly as claimed in any one of claims 1 to 6 is used.

8. The range hood according to claim 7, characterized in that: The range hood comprises an upper box body (1) as the fixed part and a lower box body (2) as the movable part, wherein the lower box body (2) is at least partially located below the upper box body (1) and at least partially covers the outer periphery of the upper box body (1), and the lower box body (2) can be raised and lowered relative to the upper box body (1), and the upper box body (1) has a front side wall (11), and the sealing assembly is at least arranged between the front side wall (11) and the lower box body (2).

9. The range hood according to claim 8, characterized in that: A groove (12) recessed toward the interior of the upper box body (1) is provided at the bottom of the front side wall (11) of the upper box body (1); the elastic member (52) of the sealing assembly is at least partially disposed in the groove (12); one end of the elastic member (52) abuts against the bottom wall (121) of the groove (12); the other end of the elastic member (52) abuts against the second sealing strip support member (512) of the sealing strip assembly (51); and the fastener (53) passes through the bottom wall (121) of the groove (12) and is fixed to the bottom wall (121).

10. The range hood according to claim 9, characterized in that: The fastener (53) is a step screw, and the fastener (53) includes a head (531), a step portion (532) and a tail portion (533) in sequence along the axial direction; the outer diameter of the head (531) is greater than the outer diameter of the step portion (532); the head (531) abuts against a side of the first sealing strip support (511) away from the sealing strip (513); the tail portion (533) passes through the bottom wall (121) of the groove (12) and enters into the interior of the upper box body (1); and the step portion (532) is located between the head (531) and the tail portion (533).

11. The range hood according to claim 10, characterized in that: The height of the step portion (532) is H2, the height of the groove (12) is H1, and H2>H1 is satisfied.

12. The range hood according to claim 8, characterized in that: The bottom of the front side wall (11) of the upper box body (1) is provided with a flange (13) extending in the direction of the lower box body (2), the gap width between the bottom of the sealing strip assembly (51) and the flange (13) is d, and the value range of d is 0.2 to 0.5 mm.

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