A self-cleaning oil screen assembly for a range hood

Abstract

The utility model discloses a kind of self-cleaning oil screen assemblies for range hood, it is related to range hood technical field, including machine body, mounting plate, baffle, steam jet pipe, steam generator and drive mechanism, mounting plate is located in one end of machine body and opens circular air inlet, oil screen without rotating shaft is rotatably assembled in air inlet, oil screen contains disc filter screen and annular flanging extending into machine body, drive mechanism contains a worm meshed with flanging turbine outer gear surface, worm is connected motor, and at least two limit rods are distributed in the circumferential direction of flanging middle axis, limit rod end ball is clamped into V-shaped groove of flanging to form surrounding support;Air inlet is provided with limit ring, and flanging gap is adapted and contacted by rolling ball rolling, steam jet pipe extends radially along oil screen, and is provided with spout towards the outer surface of oil screen. The component realizes stable rotation and self-cleaning of oil screen by shaftless design, worm drive, multiple limiting and inclined steam injection.

Description

Technical Field

[0001] This utility model relates to the field of range hood technology, and in particular to a self-cleaning oil filter assembly for range hoods. Background Technology

[0002] When the range hood is running, the oil filter first intercepts the high-temperature oil fumes. After the grease condenses, some of it drips into the oil cup. The remaining grease and solid impurities will still adhere to the surface of the oil filter and inside the pores. Long-term accumulation will clog the pores, reduce the smoke exhaust efficiency, and easily oxidize to produce odors, so it needs to be cleaned regularly. Currently, the mainstream solution for a few models with self-cleaning oil filters is to install heating elements on the edge of the oil filter to assist in melting the oil. This solution has a heat conduction problem. The oil filter and the body transfer heat through the connection structure. If the insulation measures are insufficient, the panel, frame and other areas where the body and the oil filter are connected may locally heat up. Users may be at risk of minor burns if they accidentally touch the metal parts. At the same time, the heat may be conducted into the body, causing the insulation sleeve of the wire terminals to soften, increasing electrical safety hazards.

[0003] In addition, heat will decrease with the distance of conduction, and the cleaning effect on stubborn deposits far away from the heating element and in the pores is limited, still requiring manual cleaning.

[0004] Existing heating-based self-cleaning solutions are limited by the above-mentioned problems and cannot meet the requirements for efficient and safe self-cleaning of oil filters. Therefore, it is necessary to explore new structures for oil filter self-cleaning that do not rely solely on heating. Utility Model Content

[0005] To address the aforementioned problems, the purpose of this invention is to provide a self-cleaning oil filter assembly for range hoods, thereby meeting the need for efficient and safe self-cleaning of the oil filter.

[0006] The technical solution of this utility model is as follows: A self-cleaning oil filter assembly for a range hood includes a body, an installation plate at one end of the body, a circular air inlet on the installation plate, a baffle on the front side of the air inlet, an oil filter rotatably mounted in the air inlet, a steam nozzle between the oil filter and the baffle, the steam nozzle being fixed to the end face of the installation plate by an integrally formed bracket, with the nozzle of the steam nozzle facing the outer surface of the oil filter; the air inlet pipe of the steam nozzle passes through the baffle and enters the interior of the body, and is connected to a steam generator; the water inlet pipe of the steam generator passes through the side wall of the body and has a water pipe connector at its end; the body contains a drive mechanism for driving the oil filter to rotate around its own axis, and there is no pivot at the center of the oil filter to avoid the central pivot obstructing the oil fume passage or creating a cleaning dead corner.

[0007] Furthermore, the oil screen includes a disc-shaped filter screen with an annular flange extending axially toward the interior of the machine body; a limiting ring is provided on the inner ring wall of the air inlet near the baffle, the axis of the limiting ring coincides with the axis of the air inlet, and a notch adapted to the limiting ring is provided on the flange, the radial width and axial depth of the notch being adapted to the limiting ring; multiple balls are circumferentially embedded on the end face of the limiting ring facing the flange, each ball partially protruding from the end face of the limiting ring and forming rolling contact with the end face of the notch, converting the sliding friction of the oil screen during rotation into rolling friction, reducing drive noise and wear.

[0008] Furthermore, the edge of the notch extends axially toward the baffle with a guide ring. When the fluid flows down the filter screen, the guide ring can guide the fluid to converge toward the oil collection box, preventing the fluid from entering the gap between the air inlet and the oil screen.

[0009] Furthermore, the filter screen has multiple drainage holes spaced circumferentially along its edge. The outer opening of the drainage hole smoothly transitions to the inner wall of the flange to avoid obstructing fluid flow. The filter screen has multiple main smoke passage holes in its center, which are distributed in a petal-like pattern. The main smoke passage holes are evenly distributed around the oil screen axis and extend radially along the filter screen. The outer arc length of the main smoke passage hole is greater than the inner arc length. With the rotation of the oil screen, the oil can be guided to flow along the arc wall towards the edge of the filter screen. The outer opening of the main smoke passage hole near the baffle is wider than the inner opening, forming a flared structure. This reduces the resistance when oil fumes pass through and facilitates the steam to impact the oil on the inner side of the hole wall from the outside.

[0010] Furthermore, the outer ring wall of the flange located inside the machine body is provided with a turbine external tooth surface that cooperates with the drive mechanism; the drive mechanism includes a worm gear that meshes with the turbine external tooth surface, the worm gear is installed parallel to the end face of the mounting plate next to the oil screen, the worm gear is coaxially fixedly connected to the output shaft of the motor, the worm gear axis is perpendicular to the oil screen axis, the worm gear is fixed on the mounting plate by a bearing seat with bearings, and a rubber damping pad is provided between the bearing seat and the mounting plate to reduce vibration and noise during drive.

[0011] Furthermore, the flange is located on the radial outer ring wall between the air inlet and the outer tooth surface of the turbine, and a ring-shaped V-shaped groove with the slot facing outward is formed; at least two limiting rods are spaced apart on the end face of the mounting plate, and the limiting rods and the worm are evenly distributed around the central axis of the flange; each limiting rod has a ball embedded at its free end, and the ball is partially inserted into the V-shaped groove, which cooperates with the worm to form a surrounding support for the oil screen.

[0012] Furthermore, the steam nozzle extends radially along the oil mesh, and its extension length covers more than half of the radius of the oil mesh; the steam nozzle has three nozzles spaced apart along its length, and the spray direction of each nozzle is inclined at 30°~45° relative to the radial extension direction of the steam nozzle towards the rotation direction of the oil mesh.

[0013] The beneficial effects of this utility model are as follows: 1. This utility model features a steam nozzle arranged radially between the oil screen and the baffle, with the nozzle facing the outer surface of the oil screen. During cleaning, the drive mechanism rotates the oil screen around its own axis. The steam ejected from the steam nozzle can both impact the outer surface of the oil screen and penetrate deep into the inner wall of the main smoke passage to remove stubborn oil stains. At the same time, the rotation of the oil screen causes the oil stains to flow towards the edge. After being discharged through the drain hole at the edge of the filter screen, the oil stains are guided by the guide ring at the notch of the flange to slide down towards the oil collection box. No manual intervention is required throughout the process, realizing a closed loop of "cleaning-guiding-collection" and significantly improving cleaning efficiency.

[0014] 2. The oil mesh center of this utility model abandons the traditional rotating shaft. At least two limiting rods and worm gears are evenly distributed around the center axis of the flange. The end balls are inserted into the V-shaped groove of the flange to form a surrounding support and prevent the oil mesh from moving. At the same time, the air inlet limiting ring is adapted to the flange notch and makes rolling contact with the balls. This not only limits the oil mesh but also converts sliding friction into rolling friction, which greatly reduces rotational resistance and component wear.

[0015] 3. In this utility model, the main smoke passage holes in the middle of the filter screen are evenly distributed in a petal shape and extend radially. On the one hand, the flared structure with the outer hole width being greater than the inner hole width, combined with the petal-shaped layout, maximizes the area through which oil fumes pass and reduces airflow resistance, ensuring that oil fumes are smoothly discharged along the air inlet. On the other hand, the design of the outer arc length of the main smoke passage hole being greater than the inner arc length, combined with the rotation of the oil screen, can guide the oil stains attached to the hole wall to flow towards the edge of the filter screen. At the same time, the flared structure facilitates the steam to penetrate deep into the inside of the hole, making it easy to clean the oil stains deep in the pores. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the disassembled structure of this utility model.

[0018] Figure 3 This is a front view of the mounting plate and oil mesh of this utility model.

[0019] Figure 4 This is a schematic diagram of the back of the mounting plate and oil mesh of this utility model.

[0020] Figure 5 This is a schematic diagram showing the disassembly of the mounting plate and oil mesh of this utility model.

[0021] Figure 6 This utility model Figure 5 Enlarged diagram of point A in the middle.

[0022] Figure 7This is a schematic diagram of the oil mesh of this utility model in conjunction with a limiting rod.

[0023] Figure 8 This utility model Figure 7 Enlarged diagram of point B in the middle.

[0024] Reference numerals in the attached drawings: 1. Body; 2. Mounting plate; 2-1. Air inlet; 2-1.1. Limiting ring; 3. Baffle; 4. Oil screen; 4-1. Filter screen; 4-1.1. Drain hole; 4-1.2. Main smoke passage hole; 4-2. Flanged edge; 4-2.1. Turbine outer tooth surface; 4-3. Guide ring; 4-4. V-groove; 5. Steam nozzle; 6. Steam generator; 7. Water pipe connector; 8. Drive mechanism; 8-1. Worm gear; 8-2. Permanent magnet synchronous geared motor; 9. Limiting rod. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] like Figures 1 to 8 As shown, a self-cleaning oil filter assembly for a range hood includes a body 1, with a mounting plate 2 at one end of the body 1. A circular air inlet 2-1 is provided on the mounting plate 2, and a baffle 3 is provided on the front side of the air inlet 2-1. An oil filter 4 is rotatably mounted in the air inlet. A steam nozzle 5 is provided between the oil filter 4 and the baffle 3. The steam nozzle 5 is fixed to the end face of the mounting plate 2 by an integrally formed bracket, and the nozzle of the steam nozzle 5 faces the outer surface of the oil filter 4. The air inlet pipe of the steam nozzle 5 passes through the baffle 3 and enters the interior of the body 1, and is connected to a steam generator 6. The water inlet pipe of the steam generator 6 passes through the side wall of the body 1 and has a water pipe connector 7 at its end. The body is equipped with a drive mechanism 8 that drives the oil filter 4 to rotate around its own axis. There is no pivot at the center of the oil filter 4 to avoid the central pivot blocking the oil fume passage or forming a cleaning dead corner.

[0027] Furthermore, the oil mesh 4 includes a disc-shaped filter screen 4-1, with an annular flange 4-2 extending axially toward the interior of the body 1. A limiting ring 2-1.1 is provided on the inner ring wall of the air inlet 2-1 near the baffle 3. The axis of the limiting ring 2-1.1 coincides with the axis of the air inlet 2-1. The flange 4-2 has a notch adapted to the limiting ring 2-1.1, and the radial width and axial depth of the notch are adapted to the limiting ring 2-1.1. Multiple balls are circumferentially embedded on the end face of the limiting ring 2-1.1 toward the flange 4-2. Each ball protrudes partially from the end face of the limiting ring 2-1.1 and forms rolling contact with the end face of the notch, converting the sliding friction of the oil mesh 4 during rotation into rolling friction, reducing drive noise and wear.

[0028] Furthermore, a guide ring 4-3 extends axially from the edge of the notch toward the baffle 3. When the fluid flows down along the filter screen 4-1, the guide ring 4-3 can guide the fluid to converge toward the oil collection box, preventing the fluid from entering the gap between the air inlet 2-1 and the oil screen 4.

[0029] Furthermore, the filter screen 4-1 has multiple drainage holes 4-1.1 spaced circumferentially along its edge. The outer opening of the drainage hole 4-1.1 smoothly transitions to the inner wall of the flange 4-2 to avoid obstructing fluid flow. The filter screen 4-1 has multiple main smoke passage holes 4-1.2 in its middle. These main smoke passage holes 4-1.2 are distributed in a petal-like pattern. They are evenly distributed around the axis of the oil screen 4 and extend radially along the filter screen 4-1. The outer arc length of the main smoke passage hole 4-1.2 is greater than that of the inner arc length. With the rotation of the oil screen 4, the oil can be guided to flow along the arc wall towards the edge of the filter screen 4-1. The outer opening of the main smoke passage hole 4-1.2 near the baffle 3 is wider than the inner opening, forming a flared structure. This reduces the resistance when oil fumes pass through and facilitates the impact of steam on the oil on the inner wall of the hole from the outside.

[0030] Furthermore, the outer ring wall of the flange 4-2 located inside the body 1 is provided with a turbine outer tooth surface 4-2.1 that cooperates with the drive mechanism 8; the drive mechanism 8 includes a worm 8-1 that meshes with the turbine outer tooth surface 4-2.1. The worm 8-1 is installed parallel to the end face of the mounting plate 2 next to the oil screen 4. The worm 8-1 is coaxially fixedly connected to the output shaft of the permanent magnet synchronous geared motor 8-2. The axis of the worm 8-1 is perpendicular to the axis of the oil screen 4. The worm 8-1 is fixed on the mounting plate 2 by a bearing seat with bearings. A rubber damping pad is provided between the bearing seat and the mounting plate 2 to reduce vibration and noise during drive.

[0031] Furthermore, the flange 4-2 is located on the radial outer ring wall between the air inlet 2-1 and the turbine outer tooth surface 4-2.1, and a ring-shaped V-shaped groove 4-4 with the groove opening facing outward is formed; at least two limiting rods 9 are provided at intervals on the end face of the mounting plate 2, and the limiting rods 9 and the worm gear 8-1 are evenly distributed around the central axis of the flange 4-2; each limiting rod 9 has a ball embedded at its free end, and the ball part is inserted into the V-shaped groove 4-4, which cooperates with the worm gear 8-1 to form a surrounding support for the oil screen 4.

[0032] Furthermore, the steam nozzle 5 extends radially along the oil mesh 4, and its extension length covers more than half of the radius of the oil mesh 4; the steam nozzle 5 is provided with 3 nozzles at intervals along its length direction, and the spray direction of each nozzle is inclined at 30°~45° relative to the radial extension direction of the steam nozzle 5 towards the rotation direction of the oil mesh 4.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A self-cleaning oil screen assembly for a range hood, comprising a body, one end of the body being provided with a mounting plate, a circular air inlet being formed in the mounting plate, a baffle being arranged in front of the air inlet, characterized in that, An oil mesh is rotatably installed in the air inlet, and a steam nozzle is provided between the oil mesh and the baffle, with the nozzle of the steam nozzle facing the outer surface of the oil mesh. The steam nozzle's air inlet pipe passes through the baffle and enters the machine body, and is connected to the steam generator. The steam generator's water inlet pipe passes through the side wall of the machine body and has a water pipe connector at its end. The machine body is equipped with a drive mechanism that drives the oil screen to rotate around its own axis, and there is no rotating shaft at the center of the oil screen.

2. The self-cleaning oil filter assembly for a range hood according to claim 1, characterized in that, The oil screen includes a disc-shaped filter screen with an annular flange extending axially toward the interior of the machine body; A limiting ring is provided on the inner ring wall of the air inlet near the baffle. A notch adapted to the limiting ring is provided on the flange. Multiple balls are embedded circumferentially on the end face of the limiting ring facing the flange, and each ball rolls in contact with the end face of the notch.

3. The self-cleaning oil filter assembly for a range hood according to claim 2, characterized in that, The edge of the notch extends axially toward the baffle with a guide ring.

4. The self-cleaning oil filter assembly for a range hood according to claim 2, characterized in that, The filter screen has multiple drainage holes spaced circumferentially along its edge, and the outer opening of the drainage hole smoothly transitions to the inner wall of the flange. The filter screen has multiple main smoke passage holes in the middle. These main smoke passage holes are distributed in a petal shape and extend radially along the filter screen. The outer arc length of the main smoke passage hole is greater than the inner arc length, and the width of the outer opening of the main smoke passage hole near the baffle is greater than the width of the inner opening.

5. The self-cleaning oil filter assembly for a range hood according to claim 1 or 2, characterized in that, The outer ring wall of the flange located inside the machine body is provided with a turbine outer tooth surface that cooperates with the drive mechanism; The drive mechanism includes a worm gear that meshes with the outer tooth surface of the turbine. The worm gear is installed parallel to the end face of the mounting plate next to the oil screen, and the worm gear is coaxially and fixedly connected to the output shaft of the motor.

6. The self-cleaning oil filter assembly for a range hood according to claim 5, characterized in that, The motor is a permanent magnet synchronous geared motor.

7. The self-cleaning oil filter assembly for a range hood according to claim 5, characterized in that, The flange is located on the radial outer ring wall between the air inlet and the outer tooth surface of the turbine, and has an annular V-shaped groove with the slot facing outward. At least two limiting rods are spaced apart on the end face of the mounting plate. The limiting rods and the worm are evenly distributed around the central axis of the flange. Each limiting rod has a ball embedded at its free end. The ball is inserted into the V-shaped groove and cooperates with the worm to form a surrounding support for the oil screen.

8. The self-cleaning oil filter assembly for a range hood according to claim 1, characterized in that, The steam nozzle extends radially along the oil mesh, and its extension length covers more than half of the radius of the oil mesh; the steam nozzle has three nozzles spaced apart along its length, and the spray direction of each nozzle is inclined at 30°~45° relative to the radial extension direction of the steam nozzle towards the rotation direction of the oil mesh.

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