Filtering device for range hood

Abstract

The utility model relates to the technical field of filtering of range hoods, in particular to a filtering device for range hoods, which comprises a shell, a smoke exhaust pipe is mounted in the middle of the top end of the shell, a smoke inlet pipe is arranged below the middle of the interior of the shell, and a plurality of smoke inlet holes for intercepting large-particle oil are formed in the bottom end of the outer side of the smoke inlet pipe. A smoke inlet hole is formed in the bottom end of the outer side of the shell, a rotating assembly used for separating medium-particle oil is arranged at the bottom end of the interior of the smoke inlet pipe, a fixing plate is fixedly connected to the interior of the shell, a fan capable of rotating forwards and backwards is fixedly connected to the middle of the fixing plate, and large-particle oil or splashes can be intercepted by forming the smoke inlet hole in the bottom end of the outer side of the smoke inlet pipe; through the arrangement of the spiral flow deflector, medium-particle oil drops can be separated from the oil fume moving upwards through rotating centrifugal force, and the honeycomb adsorption layer arranged in the middle of the C-shaped frame can capture tiny oil mist in the oil fume.

Description

Technical Field

[0001] This utility model relates to the field of range hood filtration technology, and in particular to a filtration device for range hoods. Background Technology

[0002] Range hoods can quickly remove waste from stove combustion and harmful fumes produced during cooking and exhaust them outdoors, thus reducing indoor pollution and purifying indoor air.

[0003] Range hoods have built-in filter components. The most common type of filter component currently used is a mesh structure filter. This filter, made of one or more layers of metal mesh or perforated metal plates, or other materials, is placed in the channel where oily fumes flow. When the oily fumes pass through, they come into contact with the filter mesh, and the heat is absorbed by the mesh. The gaseous oil in the fumes condenses into liquid oil droplets that adhere to the filter mesh, thus achieving the purpose of separating the oily fumes.

[0004] During use, existing filter mechanisms experience a gradual decrease in air permeability and fume extraction efficiency as grease accumulates on the filter mesh. Furthermore, existing filters are not conducive to grease collection; as grease accumulates on the mesh, it drips onto the stovetop or inside the range hood housing due to its own gravity, causing inconvenience for subsequent cleaning. Utility Model Content

[0005] To address the technical problem that grease gradually accumulates on the mesh of existing filter mechanisms, causing the mesh to gradually shrink and directly affecting the efficiency of fume extraction, and that existing filter screens are not convenient for collecting grease, as the grease gradually accumulates on the mesh and drips onto the stove or inside the range hood housing under its own gravity, causing inconvenience for subsequent cleaning, this utility model provides a filter device for range hoods.

[0006] This utility model is achieved using the following technical solution: a filter device for a range hood, comprising a housing, an exhaust pipe installed at the top center of the housing, an inlet pipe located at the lower center of the housing, multiple inlet holes for intercepting large oil particles on the outer bottom of the inlet pipe, a rotating component for separating medium-sized oil particles on the inner bottom of the inlet pipe, a fixed plate fixedly connected inside the housing, a fan that can rotate in both directions fixedly connected at the center of the fixed plate, an air inlet at the bottom of the fan, a pair of symmetrically arranged connecting plates fixedly connected to the bottom of the fixed plate, a C-shaped frame fixedly connected to the bottom of the connecting plate, a detachable oil collection box installed between the two sides of the C-shaped frame and the inner sidewall of the housing, the top of the inlet pipe fixedly connected to the C-shaped frame, and a detachable collection box installed at the bottom of the inlet pipe.

[0007] Through the above technical solution, the negative pressure generated by the forward rotation of the fan located in the middle of the fixed plate can drive the oil fumes into the smoke inlet at the bottom of the outer side of the smoke inlet pipe. The rotating component inside the smoke inlet pipe drives the oil fumes to move from the bottom of the smoke pipe to the air inlet at the bottom of the fan, and then out through the exhaust pipe at the top of the outer casing. When the fan rotates in the reverse direction, the blowing force generated causes the oil droplets attached to the inside of the smoke inlet pipe to be collected in the collection box installed at the bottom. The oil droplets on the top of the C-shaped frame will also be collected in the oil collection tank installed between the two sides of the C-shaped frame and the inner side wall of the outer casing by the blowing force of the fan.

[0008] As a further improvement to the above solution, the rotating assembly includes a spiral guide vane rotatably connected between the bottom middle of the flue and the C-shaped frame, wherein the middle of the C-shaped frame is provided with a honeycomb adsorption layer for capturing tiny oil mists.

[0009] Through the above technical solution, the spiral guide vane can separate medium-sized oil droplets from the upward-moving fumes through centrifugal force, and the honeycomb adsorption layer in the middle of the C-shaped frame can capture tiny oil mists in the fumes.

[0010] As a further improvement to the above solution, an isolation box is fixedly connected to the top center of the C-shaped frame, and a servo motor coaxial with the spiral guide vane is fixedly connected inside the isolation box. The top of the isolation box is provided with heat dissipation holes.

[0011] As a further improvement to the above solution, a collection hole is provided at the bottom end of the smoke inlet pipe.

[0012] Through the above technical solution, the collection hole opened at the bottom of the flue pipe allows oil droplets on the inner wall of the flue pipe and the spiral guide vane to flow into the collection box.

[0013] As a further improvement to the above solution, the collection box has a concave design, and the concave surface of the collection box is covered by a honeycomb adsorption layer opened on the C-shaped frame.

[0014] The above technical solution involves a concave collection box with the concave surface of the collection box covering the honeycomb adsorption layer on the C-shaped frame. This design ensures that oil droplets from the collection holes and the honeycomb adsorption layer can flow completely into the collection box without splashing.

[0015] As a further improvement to the above solution, the inner corners of the collection box are all chamfered.

[0016] The above technical solution avoids leaving residue at corners, preventing odors, and also facilitates subsequent cleaning.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] This invention features a smoke inlet at the bottom of the outer side of the smoke inlet pipe to intercept large oil particles or splashes. The spiral guide vanes use centrifugal force to separate medium-sized oil droplets from the upward-moving fumes. The honeycomb adsorption layer in the middle of the C-shaped frame captures tiny oil mists in the fumes. When the fan rotates in the opposite direction, the resulting blowing force causes the oil droplets attached to the inside of the smoke inlet pipe to be collected in the collection box installed at the bottom. The oil droplets on the top of the C-shaped frame are also collected in the oil collection tank installed between the sides of the C-shaped frame and the inner wall of the outer shell by the blowing force of the fan. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall internal structure of the outer shell of this utility model;

[0020] Figure 2 This is a disassembly diagram of the lower structure of the C-shaped frame of this utility model;

[0021] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 This is a cross-sectional view of the rotating component structure of this utility model.

[0023] Explanation of key symbols:

[0024] 1. Outer shell; 2. Exhaust pipe; 3. Inlet pipe; 4. Inlet hole; 5. Fixing plate; 6. Fan; 7. Air inlet; 8. Connecting plate; 9. C-frame; 10. Oil collection tank; 11. Collection box; 12. Spiral guide vane; 13. Honeycomb adsorption layer; 14. Isolation box; 15. Servo motor; 16. Collection hole. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0026] Please combine Figures 1-4This embodiment of a range hood filter includes a housing 1. A smoke exhaust pipe 2 is installed at the top center of the housing 1. A smoke inlet pipe 3 is located at the lower center of the housing 1. Multiple smoke inlet holes 4 for intercepting large oil particles are opened on the outer bottom end of the smoke inlet pipe 3. A rotating assembly for separating medium-sized oil particles is located on the inner bottom end of the smoke inlet pipe 3. A fixing plate 5 is fixedly connected inside the housing 1. A fan 6 capable of rotating in both directions is fixedly connected to the center of the fixing plate 5. An air inlet 7 is located at the bottom end of the fan 6. A pair of symmetrically arranged connecting plates 8 are fixedly connected to the bottom end of the fixing plate 5. A C-shaped frame 9 is fixedly connected to the bottom end of the connecting plate 8. Detachable fasteners are installed between the two sides of the C-shaped frame 9 and the inner sidewall of the housing 1. The oil collection tank 10 is provided. The top end of the smoke inlet pipe 3 is fixed to the C-shaped frame 9, and the bottom end of the smoke inlet pipe 3 is equipped with a detachable collection box 11. The negative pressure generated by the forward rotation of the fan 6 fixed to the middle of the inner fixing plate 5 of the outer shell 1 can drive the oil fumes into the smoke inlet hole 4 at the bottom of the outer side of the smoke inlet pipe 3. The rotating component set inside the smoke inlet pipe 3 drives the oil fumes to move from the bottom end of the smoke pipe to the air inlet 7 at the bottom end of the fan 6, and then discharges them from the exhaust pipe 2 at the top of the outer shell 1. When the fan 6 rotates in the reverse direction, the blowing force generated causes the oil droplets attached to the inside of the smoke inlet pipe 3 to be collected in the collection box 11 installed at the bottom. The oil droplets on the top of the C-shaped frame 9 will also be collected in the oil collection tank 10 installed between the two sides of the C-shaped frame and the inner side wall of the outer shell 1 by the blowing force of the fan 6.

[0027] Combination Figure 3 and Figure 4 The rotating assembly includes a spiral guide vane 12 rotatably connected between the middle of the bottom end of the smoke inlet pipe 3 and the C-shaped frame 9. The middle of the C-shaped frame 9 has a honeycomb adsorption layer 13 for capturing tiny oil mists. An isolation box 14 is fixedly connected to the middle of the top end of the C-shaped frame 9. A servo motor 15 coaxial with the spiral guide vane 12 is fixedly connected inside the isolation box 14. A heat dissipation hole is opened at the top of the isolation box 14. A collection hole 16 is opened at the bottom end of the smoke inlet pipe 3. The servo motor 15 fixed inside the isolation box 14 drives the spiral guide vane 12 located between the middle of the bottom end of the smoke inlet pipe 3 and the C-shaped frame 9 to rotate. This causes the oil mist at the bottom end of the smoke inlet pipe 3 to move towards the top end of the outer shell 1 under the negative pressure of the fan 6. At the same time, the spiral guide vane 12 limits the movement, causing the straight upward trajectory to become a spiral upward. The centrifugal force generated during the spiral rotation separates the oil particles and allows them to flow downward through the inner wall of the smoke inlet pipe 3.

[0028] Combination Figure 1 and Figure 2The collection box 11 has a concave design, and the concave surface of the collection box 11 is covered by the honeycomb adsorption layer 13 on the C-shaped frame 9. The inner corners of the collection box 11 are all chamfered. The concave design of the collection box 11 and the honeycomb adsorption layer 13 on the concave surface of the collection box 11 are designed to prevent oil droplets from the collection holes 16 and the honeycomb adsorption layer 13 from flowing completely into the collection box 11 without splashing. The chamfered inner corners of the collection box can prevent residue from remaining at the inner corners of the collection box and generating odors, and also facilitate the subsequent cleaning of the collection box.

[0029] The implementation principle of a filter device for a range hood in this embodiment is as follows:

[0030] Before operation, turn on the fan 6 fixed in the middle of the fixed plate 5 and rotate it forward. The negative pressure generated by the forward rotation can draw the oil fumes from the bottom of the outer casing 1 into the smoke inlet 4 at the bottom of the outer casing 3. The smoke inlet 4 can intercept large oil particles or splashes. At this time, turn on the servo motor 15 located inside the isolation box 14 and rotate it, so that the spiral guide vane 12 located between the bottom middle of the smoke inlet 3 and the C-shaped frame 9 rotates. This causes the oil fumes entering from the smoke inlet 4 at the bottom of the outer casing 3 to move towards the top of the outer casing 1 under the suction of the negative pressure of the fan 6. At the same time, the spiral guide vane 12 limits the upward trajectory, turning the straight upward trajectory into a spiral upward trajectory. The centrifugal force generated by the spiral rotation separates the oil particles. Then, the oil fumes pass through the honeycomb adsorption layer 13 at the top of the C-shaped frame 9 to adsorb the fine oil mist in the oil fumes. At this time, the oil fumes that have passed through the three layers of filtration enter from the air inlet 7 at the bottom of the fan 6 and are discharged from the exhaust pipe 2 at the top of the outer casing 1.

[0031] When the fan 6 rotates in the reverse direction, the generated blowing force causes the oil droplets separated from the inner wall of the smoke inlet pipe 3 and the surface of the spiral guide vane 12 to move downwards and flow into the collection box 11 through the collection hole 16 at the bottom of the smoke inlet pipe 3 for collection. At this time, the oil droplets attached to the surface of the C-shaped frame 9 will move to both sides of the C-shaped frame 9 with the blowing force of the fan 6 and flow into the collection box 11 installed at the bottom for collection. At this time, the oil droplets on the top of the C-shaped frame 9 will also move to both sides of the C-shaped frame with the blowing force of the fan 6 and finally flow into the oil collection tank 10 installed between the inner wall of the outer shell 1 and both sides of the C-shaped frame 9 for collection. The collection box 11 is set to be concave, and the concave surface of the collection box 11 covers the honeycomb adsorption layer 13 opened on the C-shaped frame 9. This is to ensure that the oil droplets from the collection hole 16 and the honeycomb adsorption layer 13 can flow completely into the collection box 11 without splashing.

[0032] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A filtering device for a range hood, characterized by, Includes an outer shell (1), a smoke exhaust pipe (2) is installed at the top center of the outer shell (1), and a smoke inlet pipe (3) is provided at the bottom center of the outer shell (1). The bottom outer end of the smoke inlet pipe (3) is provided with multiple smoke inlet holes (4) for intercepting large oil particles, and the bottom inner end of the smoke inlet pipe (3) is provided with a rotating component for separating medium oil particles. A fixing plate (5) is fixed inside the outer shell (1), and a fan (6) that can rotate in both directions is fixed in the middle of the fixing plate (5). An air inlet (7) is provided at the bottom of the fan (6). The bottom end of the fixed plate (5) is fixed with a pair of symmetrically arranged connecting plates (8), the bottom end of the connecting plate (8) is fixed with a C-shaped frame (9), the two sides of the C-shaped frame (9) are installed with a detachable oil collection box (10) between the inner side wall of the outer shell (1), the top end of the smoke inlet pipe (3) is fixed on the C-shaped frame (9), and the bottom end of the smoke inlet pipe (3) is installed with a detachable collection box (11).

2. The filtering device for a range hood according to claim 1, wherein The rotating assembly includes a spiral guide vane (12) rotatably connected between the bottom middle of the smoke inlet pipe (3) and the C-shaped frame (9), wherein the middle of the C-shaped frame (9) is provided with a honeycomb adsorption layer (13) for capturing tiny oil mists.

3. The filtering device for a range hood according to claim 2, wherein An isolation box (14) is fixedly connected to the top center of the C-shaped frame (9). A servo motor (15) coaxial with the spiral guide plate (12) is fixedly connected inside the isolation box (14). A heat dissipation hole is opened at the top of the isolation box (14).

4. The filter device for a range hood as described in claim 2, characterized in that, The bottom end of the smoke inlet pipe (3) is provided with a collection hole (16).

5. The filtering device for a range hood according to claim 2, wherein The collection box (11) has a concave design, and the concave surface of the collection box (11) is covered by a honeycomb adsorption layer (13) opened on the C-shaped frame (9).

6. The filtering device for a range hood according to claim 1, wherein The inner corners of the collection box (11) are all chamfered.

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