Range hood

Abstract

The utility model discloses a range hood which comprises an upper box body, a lower box body capable of ascending and descending relative to the upper box body and an exhaust fume collecting hood arranged at the bottom of the lower box body, a fume inlet is formed in the exhaust fume collecting hood, an outer filter screen is arranged at the fume inlet, and an inner filter screen is arranged at the bottom of the upper box body; the range hood further comprises a self-cleaning device, the self-cleaning device comprises a cleaning assembly, the cleaning assembly comprises a first cleaning brush and a second cleaning brush, the first cleaning brush is tightly attached to the lower surface of the inner filter screen, and the second cleaning brush is tightly attached to the upper surface of the outer filter screen; the moving assembly comprises a first telescopic assembly and a second telescopic assembly, the first telescopic assembly comprises a first outer pipe and a first telescopic part, the second telescopic assembly comprises a second outer pipe and a second telescopic part, the first outer pipe is rotationally connected with the upper box body, the first telescopic part is connected to the second cleaning brush, and the second outer pipe is rotationally connected with the first outer pipe; the second telescopic piece is connected to the first cleaning brush, so that when the lower box body ascends and descends relative to the upper box body, the moving assembly drives the cleaning brushes to move front and back.

Description

Technical Field

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

[0002] With the improvement of users' requirements for the appearance and use environment of kitchen range hoods, the retractable range hood descends when in use and retracts when turned off, which can greatly release the countertop space and is also convenient for users to clean. Therefore, it has been more and more widely used.

[0003] The retractable range hood generally includes an upper box body assembly and a lower box body assembly. The upper box body assembly internally contains a range hood fan assembly, left and right side installation guide rails, and a motor controls a worm to rotate to drive a nut to move up and down. The lower box body assembly is installed with a connecting plate. The middle of the connecting plate is fixed to the nut on the upper box body, and the lower ends of the left and right sides are connected to the angle steel structures. The upper ends of the angle steels are connected to the guide rails on the upper box body. The motor on the upper box body controls the worm to rotate, and the nut drives the lower box body assembly to move up and down. The connection between the left and right guide rails and the lower box body can ensure the stability of the lower box body assembly when moving up and down.

[0004] Reference can be made to a retractable range hood disclosed in Chinese Patent with the application number 202321372669.4, which includes a fan frame. An oil fume suction fan is installed inside the fan frame, an outer box body is installed outside the fan frame, a smoke collecting hood is installed at the bottom of the outer box body, a smoke inlet is opened on the smoke collecting hood, a first plate body is installed at the bottom of the fan frame, a second plate body is installed at the smoke inlet. When the outer box body is in the raised state, the first plate body and the second plate body overlap each other to close the smoke inlet. When the outer box body is in the lowered state, a smoke inlet channel is formed between the first plate body and the second plate body.

[0005] As can be seen from the above, in order to solve the oil path problem, the top - suction range hood usually has two layers of filter screens (plate bodies). After long - term use, oil stains will appear on the surfaces of each filter screen. The existing solution is that the lower - layer filter screen can be removed and cleaned through a quick - release structure. However, for the oil stain problem of the upper - layer filter screen, since it is located inside the whole machine, there is currently no effective treatment method.

[0006] Therefore, further improvement is still needed. Summary of the Utility Model

[0007] The technical problem to be solved by the utility model is to provide a range hood aiming at the deficiencies of the above - mentioned existing technology, which can clean the upper and lower layers of filter screens and avoid the accumulation of oil stains.

[0008] The technical solution adopted by the present utility model to solve the above technical problems is as follows: An oil fume extractor, comprising an upper box body, a lower box body capable of lifting relative to the upper box body, and a smoke collecting hood arranged at the bottom of the lower box body. An air inlet is provided on the smoke collecting hood, and an outer filter screen is arranged at the air inlet. An inner filter screen is arranged at the bottom of the upper box body; it is characterized in that:

[0009] The oil fume extractor further comprises a self-cleaning device for cleaning the outer filter screen and the inner filter screen. The self-cleaning device comprises:

[0010] A cleaning component, which comprises a first cleaning brush and a second cleaning brush. The first cleaning brush is pressed against the lower surface of the inner filter screen, and the second cleaning brush is pressed against the upper surface of the outer filter screen; and

[0011] A movement component, which comprises a first telescopic component and a second telescopic component. The first telescopic component comprises a first outer tube and a first telescopic member, and the second telescopic component comprises a second outer tube and a second telescopic member. The first outer tube is rotatably connected to the upper box body, the first telescopic member is connected to the second cleaning brush, the second outer tube is rotatably connected to the first outer tube, and the second telescopic member is connected to the first cleaning brush. Thus, when the lower box body lifts relative to the upper box body, the movement component drives each cleaning brush to move back and forth.

[0012] By arranging the self-cleaning device, each filter screen is provided with a cleaning brush, so that it is convenient to clean each filter screen. And by arranging the movement component and making it associated with the lifting of the lower box body, there is no need to set up a driving mechanism, and the movement component can drive the cleaning brush to move for cleaning. Moreover, cleaning can be carried out when the lower box body rises and falls, which not only solves the problem that the inner filter screen cannot be cleaned, but also reduces the number of times of disassembling and cleaning the outer filter screen, improving the user experience.

[0013] To facilitate defining the movement path of each cleaning brush, the cleaning component comprises a first cleaning guide rail and a second cleaning guide rail. There are two first cleaning guide rails and they are respectively fixed on the left and right sides of the inner filter screen. The left and right ends of the first cleaning brush are supported in the first cleaning guide rail; there are also two second cleaning guide rails and they are respectively fixed on the left and right sides of the outer filter screen. The left and right ends of the second cleaning brush are supported in the second cleaning guide rail.

[0014] To facilitate the relative movement between the cleaning brush and the cleaning guide rail, the end of the first cleaning brush is supported in the first cleaning guide rail through a first roller, and the end of the second cleaning brush is supported in the second cleaning guide rail through a second roller.

[0015] Preferably, to facilitate the stable telescoping of the telescopic members, the first telescopic member and the second telescopic member are both pneumatic springs.

[0016] Preferably, the first outer tube is connected to the front side of the upper box body. When the lower box body is in an ascending state relative to the upper box body, the first cleaning brush and the second cleaning brush are respectively located at the rear ends of the corresponding filter screens.

[0017] Preferably, to enable the two ends of each cleaning brush to move synchronously, there are two sets of combinations of the first telescopic assembly and the second telescopic assembly, which are respectively arranged on the left and right sides of the outer filter screen and the inner filter screen.

[0018] Furthermore, the range hood further includes a motion mechanism, which includes a motor and a lead screw. The motor is fixedly arranged on the top of the upper box body, and the lead screw extends vertically. The lead screw is driven by the motor to rotate around its own axis, and the lower box body is directly or indirectly threadedly connected to the lead screw.

[0019] Furthermore, to avoid oil leakage and facilitate the installation of the inner filter screen, at least part of the lower box body covers the outer periphery of the upper box body.

[0020] Furthermore, the outer filter screen is detachably connected to the smoke collecting hood, and the inner filter screen is fixed to the upper box body.

[0021] Compared with the prior art, the advantages of the present utility model are as follows: By providing a self-cleaning device, each filter screen is provided with a cleaning brush, so that it is convenient to clean each filter screen. And by providing a motion component, which is associated with the lifting of the lower box body, it is possible to drive the cleaning brush to move for cleaning without setting a driving mechanism, and cleaning can be carried out when the lower box body rises and falls. This not only solves the problem that the inner filter screen cannot be cleaned, but also reduces the number of times of disassembling and cleaning the outer filter screen, improving the user experience. Description of the Drawings

[0022] Figure 1 is a schematic diagram of the range hood in the ascending state according to an embodiment of the present utility model;

[0023] Figure 2 is a schematic diagram of the range hood in the ascending state with part of the lower box body hidden according to an embodiment of the present utility model;

[0024] Figure 3 is a cross-sectional view (vertical cross-section in the left-right direction) of the range hood in the ascending state according to an embodiment of the present utility model;

[0025] Figure 4 is a schematic diagram of the filter screen assembly and the self-cleaning device of the range hood in the ascending state according to an embodiment of the present utility model;

[0026] Figure 5 is Figure 4 an exploded structural schematic diagram;

[0027] Figure 6Front view of the down state of the range hood according to the embodiment of the present utility model;

[0028] Figure 7 Back view of the down state of the range hood according to the embodiment of the present utility model;

[0029] Figure 8 Schematic diagram of the rising state of the range hood according to the embodiment of the present utility model, with part of the lower cabinet hidden. Detailed implementation manners

[0030] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions.

[0031] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These are 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 disclosed embodiments of the present utility model can be arranged in different directions, these terms indicating directions should only be regarded as illustrative and not restrictive. For example, "upper" and "lower" are not necessarily limited to the directions opposite to or consistent with the gravity direction. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0032] See Figures 1 to 8 , a range hood, including an upper cabinet 1, a lower cabinet 2, a fan system (not shown) disposed in the upper cabinet 1, and a motion mechanism for driving the lower cabinet 2 to move up and down relative to the upper cabinet 1. A smoke collecting hood 3 is provided at the bottom of the lower cabinet 2, and a smoke inlet 31 is formed on the smoke collecting hood 3. Thus, a top suction type range hood is formed. At least part of the lower cabinet 2 is located below the upper cabinet 1 and at least part of it wraps around the outer periphery of the upper cabinet 1.

[0033] 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 43 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.

[0034] The range hood further includes a filter assembly, including an outer filter 51 disposed at the smoke inlet 31 of the smoke hood 3, and an inner filter 52 disposed at the bottom of the upper housing 1, the inner filter 52 being located below the fan system and used to receive oil dripping from the upper housing 1 and the fan system. The outer filter 51 can be connected to the smoke hood 3 via a quick-release structure, so that it can be detached relative to the smoke hood 3, while the inner filter 52 is fixed to the upper housing 1 via screws and is usually not detachable.

[0035] The range hood further includes a self-cleaning device for cleaning the outer filter 51 and the inner filter 52. The self-cleaning device includes a cleaning assembly and a motion assembly. The cleaning assembly includes a first cleaning rail 61, a second cleaning rail 62, a first cleaning brush 63, a second cleaning brush 64, a first roller 65 and a second roller 66, wherein the first cleaning rail 61, the first cleaning brush 63 and the first roller 65 constitute an upper cleaning assembly for cleaning the inner filter 52, and the second cleaning rail 62, the second cleaning brush 64 and the second roller 66 constitute a lower cleaning assembly for cleaning the outer filter 51.

[0036] There are two first cleaning rails 61, which are fixed on the left and right sides of the inner filter 52, respectively, and can be fixed to the upper box 1. The left and right ends of the first cleaning brush 63 are respectively supported in the first cleaning rails 61, and optionally, the left and right ends of the first cleaning brush 63 are respectively provided with first rollers 65, each of which cooperates with the first cleaning rail 61 at a corresponding position, and the first rollers 65 can move forward and backward along the first cleaning rails 61.

[0037] The second cleaning rails 62 also have two, which are fixed on the left and right sides of the outer filter 51, respectively, and can be fixed to the smoke hood 3. The left and right ends of the second cleaning brush 64 are respectively supported in the second cleaning rails 62, and optionally, the left and right ends of the second cleaning brush 64 are respectively provided with second rollers 66, each of which cooperates with the second cleaning rails 62 at the corresponding position, and the second rollers 66 can move forward and backward along the second cleaning rails 62.

[0038] The above-mentioned first roller 65 and second roller 66 can also roll relative to the corresponding cleaning guide rails, thereby driving the corresponding cleaning brushes to roll. The first cleaning brush 63 is in close contact with the lower surface of the inner filter screen 52, while the second cleaning brush 64 is in close contact with the upper surface of the outer filter screen 51.

[0039] The motion assembly includes a first telescopic assembly 67 and a second telescopic assembly 68. Preferably, there are two sets of the combination formed by the first telescopic assembly 67 and the second telescopic assembly 68, which are respectively arranged on the left and right sides of the inner filter screen 52 and the outer filter screen 51 (one set on each side). The first telescopic assembly 67 includes a first outer tube 671 and a first telescopic member 672. The first telescopic member 672 can telescopically move relative to the first outer tube 671. The second telescopic assembly 68 includes a second outer tube 681 and a second telescopic member 682. The second telescopic member 682 can telescopically move relative to the second outer tube 681. Preferably, the first telescopic member 672 and the second telescopic member 682 are pneumatic springs. Alternatively, they can also be springs or rods. The first outer tube 671 is rotatably connected to the front side of the upper box body 1, and the rotation axis extends in the left-right direction. The second outer tube 681 is rotatably connected to the first outer tube 671, and the rotation axis extends in the left-right direction. One end of the first telescopic member 672 is located inside the first outer tube 671, while the other end is connected to the corresponding end of the second cleaning brush 64 or the second roller 66. One end of the second telescopic member 682 is located inside the second outer tube 681, while the other end is connected to the corresponding end of the first cleaning brush 63 or the first roller 65.

[0040] When the range hood is turned off, refer to Figure 2 , the first roller 65 is located at the rear end of the first cleaning guide rail 61, the second roller 66 is located at the rear end of the second cleaning guide rail 62, and both telescopic members are in a compressed state.

[0041] After the range hood is turned on, refer to Figure 8 , the motor 41 of the motion mechanism drives the lead screw 42 to rotate, and the lower box body 2 moves downward as a whole. During the relative displacement of the upper and lower box bodies, the first outer tube 671 rotates relative to the upper box body 1, the first telescopic member 672 extends, the second roller 66 drives the second cleaning brush 64 to move forward along the second cleaning guide rail 62, so that the second cleaning brush 64 cleans the outer filter screen 51. At the same time, the second outer tube 681 rotates relative to the first outer tube 681, the second telescopic member 682 extends, the first roller 65 drives the first cleaning brush 63 to move forward along the first cleaning guide rail 61, so that the first cleaning brush 63 cleans the inner filter screen 52. Thus, the synchronous cleaning of the inner and outer filter screens is completed. The meaning of the above-mentioned "extension" of the first telescopic member 672 and the second telescopic member 682 includes that their own lengths become larger, or the lengths of the parts exposed relative to the corresponding outer tubes become larger.

[0042] When the range hood is turned off again, the motor 41 of the moving mechanism rotates in the reverse direction to drive the lead screw 42 to rotate, and the lower box body 2 moves upward as a whole. During the relative displacement of the upper and lower box bodies, the outer tubes of the moving components rotate, and at the same time, each telescopic member contracts, driving the first cleaning brush 63 and the second cleaning brush 64 to move backward in the reverse direction, completing the secondary synchronous cleaning of the inner and outer filters. Finally, each cleaning brush moves to the rear end of each cleaning guide rail, and each telescopic member is in a compressed state, returning to the shutdown state. Correspondingly, the meaning of "contraction" of the above-mentioned first telescopic member 672 and second telescopic member 682 includes that its own length becomes smaller, or the length of the part exposed relative to the corresponding outer tube becomes smaller.

[0043] Alternatively, the first outer tube 671 can also be connected to the rear side of the upper box body 1. When the lower box body 2 is in a state of rising relative to the upper box body 1, the two cleaning brushes are located at the front end parts of the corresponding filters.

Claims

1. An oil fume extractor, comprising an upper box body (1), a lower box body (2) capable of lifting relative to the upper box body (1), and a smoke collecting hood (3) provided at the bottom of the lower box body (2). An air inlet (31) is provided on the smoke collecting hood (3), and an outer filter screen (51) is provided at the air inlet (31). An inner filter screen (52) is provided at the bottom of the upper box body (1); characterized in that: The oil fume extractor further comprises a self-cleaning device for cleaning the outer filter screen (51) and the inner filter screen (52), and the self-cleaning device comprises: A cleaning assembly, which includes a first cleaning brush (63) and a second cleaning brush (64). The first cleaning brush (63) is closely attached to the lower surface of the inner filter screen (52), and the second cleaning brush (64) is closely attached to the upper surface of the outer filter screen (51); and A motion assembly, which includes a first telescopic assembly (67) and a second telescopic assembly (68). The first telescopic assembly (67) includes a first outer tube (671) and a first telescopic member (672). The second telescopic assembly (68) includes a second outer tube (681) and a second telescopic member (682). The first outer tube (671) is rotatably connected to the upper box body (1). The first telescopic member (672) is connected to the second cleaning brush (64). The second outer tube (681) is rotatably connected to the first outer tube (671). The second telescopic member (682) is connected to the first cleaning brush (63). Thus, when the lower box body (2) lifts relative to the upper box body (1), the motion assembly drives each cleaning brush to move back and forth.

2. The range hood according to claim 1, wherein: The cleaning assembly includes a first cleaning guide rail (61) and a second cleaning guide rail (62). There are two first cleaning guide rails (61), which are respectively fixed on the left and right sides of the inner filter screen (52). The left and right ends of the first cleaning brush (63) are supported in the first cleaning guide rail (61); there are also two second cleaning guide rails (62), which are respectively fixed on the left and right sides of the outer filter screen (51). The left and right ends of the second cleaning brush (64) are supported in the second cleaning guide rail (62).

3. The range hood according to claim 2, wherein: The end of the first cleaning brush (63) is supported in the first cleaning guide rail (61) through a first roller (65), and the end of the second cleaning brush (64) is supported in the second cleaning guide rail (62) through a second roller (66).

4. The range hood according to any one of claims 1 to 3, characterized in that: Both the first telescopic member (672) and the second telescopic member (682) are pneumatic springs.

5. The range hood according to any one of claims 1 to 3, characterized in that: The first outer tube (671) is connected to the front side of the upper box body (1). When the lower box body (2) is in an ascending state relative to the upper box body (1), the first cleaning brush (63) and the second cleaning brush (64) are respectively located at the rear ends of the corresponding filter screens.

6. The range hood according to any one of claims 1 to 3, characterized in that: There are two sets of combinations of the first telescopic assembly (67) and the second telescopic assembly (68), which are respectively arranged on the left and right sides of the outer filter screen (51) and the inner filter screen (52).

7. The range hood according to any one of claims 1 to 3, characterized in that: The range hood further includes a motion mechanism, the motion mechanism including a motor (41) and a lead screw (42). The motor (41) is fixedly arranged at the top of the upper box body (1), the lead screw (42) extends vertically, the lead screw (42) is driven by the motor (41) to rotate about its own axis, and the lower box body (2) is directly or indirectly threadedly connected to the lead screw (42).

8. The range hood according to any one of claims 1 to 3, characterized in that: At least a part of the lower box body (2) covers the outer periphery of the upper box body (1).

9. The range hood according to any one of claims 1 to 3, characterized in that: The outer filter screen (51) is detachably connected to the smoke collecting hood (3), and the inner filter screen (52) is fixed to the upper box body (1).

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