Oil fume collecting air duct structure, oil fume collecting device and range hood

Abstract

The utility model provides an oil fume collecting air duct structure, an oil fume collecting device and a range hood. The oil fume collecting air duct structure comprises at least one lower wind detection shell which is arranged below the range hood and extends downwards to be close to the surface of a cooking bench; at least two side faces of the lower air blowing shell incline downwards and inwards in the direction opposite to the smoke exhaust direction so that the lower air blowing channel can form a structure with the large upper portion and the small lower portion in the smoke exhaust direction. A plurality of smoke inlets are formed in the side face of the lower air blowing shell. According to the oil fume collecting air duct structure, the oil fume collecting device and the range hood, oil fume on the surface of a cooking bench can be sucked in advance, oil fume leakage caused by the diffusion effect in the rising process of the oil fume is avoided, and the suction efficiency and the oil fume suction effect are improved; and oil fume in the fume collecting cavity is effectively collected through the oil cup, so that the interior of the fume collecting cavity is kept clean.

Description

Technical Field

[0001] This utility model relates to the technical field of range hoods, and in particular to a fume collection duct structure, a fume collection device, and a range hood. Background Technology

[0002] Traditional European-style range hoods typically use a top-mounted fume collection structure. The fumes naturally rise to the lower part near the collection chamber and are then drawn into the range hood by its suction. To improve fume extraction, the rotation speed of the multi-blade centrifugal fan inside the range hood is usually increased to enhance its performance and capture as much fume as possible, thus addressing the issue of fume escape.

[0003] However, because the smoke inlet of a top-mounted range hood is relatively far from the pot on the stove (or cooktop), the fumes produced in the pot often escape as they rise near the hood's inlet (smoke escape), resulting in poor smoke extraction and a pungent, unpleasant cooking experience. To address this problem, existing technologies improve smoke extraction by increasing the speed of the multi-blade centrifugal fan inside the range hood. However, this method has limited effectiveness and also leads to increased energy consumption, noise, and vibration. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defect of poor oil fume extraction effect of existing range hoods, and to provide an oil fume collection duct structure, an oil fume collection device and a range hood.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] A fume collection duct structure is disclosed for collecting fumes generated by a stove. The fume collection duct structure includes at least one downward-extending vent housing installed below a range hood and extending downward to a surface close to the stove. The downward-extending vent housing includes a downward-extending duct that communicates with the fume collection chamber of the range hood. At least two sides of the downward-extending vent housing are inclined downward and inward in the opposite direction to the exhaust direction, so that the downward-extending duct forms a structure that is wider at the top and narrower at the bottom along the exhaust direction. Several fume inlets are provided on the sides.

[0007] In this design, the fume extraction duct structure, through the aforementioned downward-protruding air housing, brings the fume-absorbing housing closer to the stove surface. This allows for earlier extraction of fumes from the stove surface, preventing fumes from escaping during their ascent due to diffusion (i.e., fumes escaping without being extracted in time). This effectively collects the fumes. The design also creates a top-high, bottom-low structure within the downward-protruding air duct along the exhaust direction, ensuring a higher gas velocity, especially at the bottom. This means that fumes near the stove surface are extracted faster and more effectively, thus improving fume extraction efficiency.

[0008] Preferably, the lower exhaust shell is located at the middle position between the two burners of the stove; and / or, the side includes at least two opposing first sides and at least two second sides adjacent to the two first sides, the two first sides being inclined downward and inward in the opposite direction of the exhaust direction, and the two second sides being inclined downward and inward in the opposite direction of the exhaust direction.

[0009] In this design, the downward-facing exhaust shell is positioned between the two burners, allowing it to simultaneously draw in fumes from both sides without interfering with cooking activities above the pot. This improves both extraction efficiency and fume extraction effectiveness. The two opposing first and second sides are angled downwards and inwards in the opposite direction of exhaust, forming a conical structure with at least four sides tapering in the opposite direction of exhaust. This further enhances the gas flow velocity below the duct, further improving the speed and effectiveness of fume extraction.

[0010] Preferably, along the exhaust direction, the number of smoke inlets near the bottom of the lower exhaust shell is greater than the number of smoke inlets near the top of the lower exhaust shell, and / or, the opening of the smoke inlets near the bottom of the lower exhaust shell is larger than the opening of the smoke inlets near the top of the lower exhaust shell.

[0011] In this design, the above-mentioned configuration, in terms of quantity and / or opening size, ensures that the smoke intake range of the downward-protruding fan housing narrows from bottom to top. This guarantees that the closer to the stovetop, the larger the smoke intake range and the stronger the oil fume capture capability, preventing the continuous diffusion of oil fumes (i.e., oil fumes on the stovetop surface are sucked away from the smoke intake before they have a chance to spread). The downward-protruding fan housing forms multiple layers of smoke intakes from bottom to top, ensuring that when large areas of oil fumes are generated, they can be effectively captured within a vertical range.

[0012] Preferably, the two first sides are respectively arranged facing the two burners on the stove, the oil fume duct structure is provided with wing plates above the two burners, the range hood includes two smoke baffles forming the smoke collection chamber, each wing plate is spaced apart below the corresponding smoke baffle, and each smoke baffle has at least one smoke collection port communicating with the smoke collection chamber.

[0013] In this design, the rising fumes collide with and are adsorbed onto the wing plate surface via the aforementioned wing plate configuration, creating a wall adsorption effect. The fumes then flow along the wing plate surface and are drawn into the range hood through the smoke collection port of the smoke collection chamber. Thus, the wing plate enhances the adsorption capacity of the fumes, thereby improving the fume extraction effect. Furthermore, by positioning the wing plates at intervals below the smoke baffle, the fumes form a meandering flow path between the wing plates and the smoke baffle, rather than being directly drawn into the smoke collection chamber. This allows more of the rising fumes to adhere to the wall adsorption effect near the wing plates, preventing them from escaping.

[0014] Preferably, the number of smoke collection ports on each of the smoke baffles does not exceed two;

[0015] And / or, the far end of the wing plate away from the lower wind-probing shell is detachably connected to the smoke baffle, and the near end of the wing plate close to the lower wind-probing shell is detachably connected to the shell of the lower wind-probing shell or the smoke baffle.

[0016] In this design, by setting the number of smoke collection ports on each smoke baffle to no more than two, on the one hand, the oil fumes are less likely to pass through the smoke collection ports, thus reducing resistance and ensuring that more oil fume airflow is distributed downwards and absorbed by the downward-facing air intake shell, guaranteeing the effectiveness of the downward-facing air intake shell as the main smoke extraction device; on the other hand, the amount of oil fumes reaching the smoke collection chamber is greatly reduced, eliminating the need for large-area smoke collection ports to capture the oil fumes. The two ends of the wing plates are detachably connected for easy cleaning.

[0017] A fume collection device includes a fume collection duct structure as described above and a first oil cup. The range hood includes a plurality of upper oil leakage holes arranged around the top of the lower air probe shell and connected to the fume collection chamber. The first oil cup is arranged around the top of the lower air probe shell and detachably connected to the lower air probe shell. The opening of the first oil cup is arranged opposite to the plurality of upper oil leakage holes.

[0018] In this design, the fume collection device, through the aforementioned fume collection duct structure, can pre-extract fumes from the stove surface, preventing them from escaping due to diffusion during their ascent, thus improving extraction efficiency and fume removal effect. The first oil cup, as described above, simultaneously collects fumes gathered around the top of the lower air probe shell within the fume collection chamber, promptly collecting the fumes at the top. The first oil cup and the lower air probe shell are detachably connected, facilitating disassembly and cleaning of the first oil cup.

[0019] Preferably, the lower air-exploring shell includes at least two opposing first sides and at least two second sides adjacent to the two first sides. The two first sides are respectively positioned facing the two burners on the stove. The oil fume collection duct structure is provided with wing plates above the two burners. The range hood includes two smoke baffles forming the smoke collection chamber. Each wing plate is spaced apart below the corresponding smoke baffle. The wing plates are inclined from the far end away from the lower air-exploring shell to the near end near the lower air-exploring shell, and the height of the wing plate at the far end is higher than the height of the wing plate at the near end. The upper oil leakage hole includes an oil leakage hole on the connecting plate between the two smoke baffles, an oil leakage hole on the front edge above the second side, and an oil leakage hole on the side edge of the wing plate near the first side.

[0020] In this solution, the oil fumes collected on the wing plates and their side oil drain holes are collected; the oil drain holes on the front side are collected; thus, oil fumes can be effectively collected on different sides of the top of the lower air vent shell.

[0021] Preferably, the fume collection device further includes a second oil cup, and the bottom of the lower air probe shell is provided with a plurality of lower oil leakage holes. The second oil cup is located at the bottom of the lower air probe shell and is detachably connected to the lower air probe shell. The opening of the first oil cup surrounds the bottom of the lower air probe shell and is arranged opposite to the plurality of lower oil leakage holes.

[0022] In this design, the second oil cup effectively collects the fumes from the lower air duct around the bottom of the lower air duct housing, enabling timely cleaning of the fumes inside. The second oil cup is detachably connected to the lower air duct housing, facilitating its removal and cleaning.

[0023] Preferably, the second oil cup contains a magnetic material, the lower air probe shell is made of metal, and the second oil cup is magnetically adsorbed onto the bottom surface of the lower air probe shell.

[0024] In this design, the second oil cup is magnetically attached to the bottom surface of the lower air probe casing, making disassembly simpler.

[0025] A range hood, the range hood including the oil fume collection device as described above.

[0026] In this solution, the range hood, through the aforementioned oil fume collection device, can pre-extract the oil fumes from the surface of the stove, preventing the oil fumes from escaping due to diffusion during their ascent, thus improving extraction efficiency and oil fume removal effect; and the oil cup effectively collects the oil fumes in the fume collection chamber, keeping the fume collection chamber clean.

[0027] The positive and progressive effects of this utility model are as follows: the oil fume duct structure, oil fume collection device and range hood can pre-extract the oil fumes from the surface of the stove, preventing the oil fumes from escaping due to diffusion during the rising process, thus improving the extraction efficiency and oil fume extraction effect; and the oil cup effectively collects the oil fumes in the smoke collection chamber, keeping the smoke collection chamber clean. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the internal structure of the oil fume collection duct structure in the range hood according to Embodiment 1 of this utility model.

[0029] Figure 2 This is a partial side view of the downward-expanding air casing of Embodiment 1 of this utility model on a range hood.

[0030] Figure 3 This is a partial view (view 1) of the downward-facing air vent shell of Embodiment 1 of this utility model on a range hood.

[0031] Figure 4 This is a partial view (view 2) of the downward-facing air vent shell of Embodiment 1 of this utility model on a range hood.

[0032] Figure 5 This is a partial structural diagram of the downward-expanding air shell of Embodiment 1 of this utility model on a range hood.

[0033] Figure 6 This is a schematic diagram of the internal structure of the oil fume collection device in embodiment 2 of this utility model on a range hood.

[0034] Figure 7 This is a partial structural diagram of the first oil cup on the range hood in Embodiment 2 of this utility model.

[0035] Figure 8 This is a partial cross-sectional view of the first oil cup on the range hood in Embodiment 2 of this utility model.

[0036] Figure 9 This is a schematic diagram of the structure of the first oil cup in Embodiment 2 of this utility model.

[0037] Figure 10 This is a schematic diagram of the structure of the second oil cup installed on the lower air probe shell in Embodiment 2 of this utility model.

[0038] Figure 11 This is a schematic diagram of the structure of the second oil cup in Embodiment 2 of this utility model.

[0039] Explanation of reference numerals in the attached figures:

[0040] Range Hood 1

[0041] Lower wind shell 2

[0042] Lower ventilation duct 21

[0043] First side view 22

[0044] First smoke inlet 220

[0045] Second side view 23

[0046] Second smoke inlet 230

[0047] Wing 3

[0048] Flexible opening and closing structure 31

[0049] Smoke collection chamber 4

[0050] Smoke baffle 5

[0051] male head 51

[0052] Smoke collection port 52

[0053] Smoke exhaust direction A

[0054] First oil cup 6

[0055] Second oil cup 7

[0056] Upper oil leakage hole 8

[0057] Oil leakage hole 81 on the right side

[0058] 82 oil leakage holes on the side

[0059] Lower oil leakage hole 9 Detailed Implementation

[0060] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.

[0061] Example 1

[0062] like Figure 1-5 As shown, this embodiment provides a fume collection duct structure for collecting fumes generated by the stove. The fume collection duct structure includes at least one downward-exploring shell 2 installed below the range hood 1 and extending downward to the surface near the stove. The downward-exploring shell 2 includes a downward-exploring duct 21 that communicates with the fume collection chamber 4 of the range hood 1.

[0063] At least two sides of the downward-exploring air casing 2 are inclined downward and inward in the opposite direction of the smoke exhaust A, so that the downward-exploring air duct 21 forms a structure that is larger at the top and smaller at the bottom along the direction of the smoke exhaust A; several smoke inlets are provided on the side of the downward-exploring air casing.

[0064] Specifically, such as Figure 1-3 As shown in the figure, in this embodiment, the lower air probe shell 2 is a regularly shaped metal square shell, located in the middle of the two burners on the stove (not shown in the figure), that is... Figure 1The lower air intake shell 2 has a burner on each side (the burner is the part of the stove where flames are generated and pots are placed). The lower air intake shell 2 includes four sides: two left and right sides facing the burner, and two front and back sides adjacent to the two first sides 22. All four sides are inclined downward and inward, forming a tapered conical structure that is larger at the top and smaller at the bottom. The smoke inlet includes a first smoke inlet 220 on the first side 22 and a second smoke inlet on the second side 23. Specifically, the first smoke inlet 220 is a horizontal, slender smoke inlet slit in the lower half of the left and right first sides 22, and multiple first smoke inlets 220 are formed on the first side 22 in the vertical direction (i.e., the exhaust direction A). Similarly, the second smoke inlet 230 is a vertical, slender smoke inlet slit in the lower half of the front and back second sides 23, and multiple second smoke inlets 230 are formed on the second side 23 in the vertical direction. In other embodiments, the shape of the lower exhaust casing 2 can be irregular or have more sides, depending on the needs. Depending on the smoke extraction requirements, the smoke inlets on the lower exhaust casing 2 can be located only on the first side 22 or only on the second side 23. Furthermore, the number, shape, and size of the first smoke inlet 220 and the second smoke inlet 230 can be adjusted as needed.

[0065] The structure of this fume extraction duct, through the aforementioned downward-protruding air housing 2, brings the fume-absorbing housing 2 closer to the stove surface. This allows for earlier extraction of fumes from the stove surface, preventing fumes from escaping during their ascent due to diffusion (i.e., fumes escaping during their ascent without being extracted in time). Therefore, it effectively collects fumes. Through this design, the downward-protruding air duct 21 of the downward-protruding air housing 2 forms a conical structure, wider at the top and narrower at the bottom, along the exhaust direction A. This ensures a higher gas velocity within the duct, especially at the bottom, meaning that fumes near the stove surface are extracted faster and more effectively, thus improving the fume extraction effect.

[0066] In this embodiment, the downward-expanding vent 2 is positioned in the middle of the two burners, allowing it to simultaneously draw in fumes from both sides without interfering with cooking activities above the pot, thus improving both extraction efficiency and fume removal. However, in other embodiments, the number and placement of the downward-expanding vent 2 can be adjusted according to the specific structural requirements. For example, a downward-expanding vent 2 can be placed above each of the two burners on the stovetop, meaning its position is not limited to the middle of the two burners.

[0067] In this embodiment, both the first side 22 and the second side 23, which are arranged opposite to each other, are inclined downward and inward along the opposite direction of smoke exhaust A, forming a conical structure with at least four sides that taper inward along the opposite direction of smoke exhaust. This further enhances the gas flow velocity below the duct and further improves the speed and effectiveness of smoke extraction. In other embodiments, when the sides of the lower air vent 2 form a structure that is larger at the top and smaller at the bottom, the number of sides that are inclined downward and inward along the opposite direction of smoke exhaust A can be adjusted as needed, and is not limited to all four sides taper inward in this embodiment. For example, two sides could also taper inward.

[0068] Among them, such as Figure 2 As shown, along the exhaust direction A, the number of first smoke inlets 220 near the bottom of the lower exhaust shell 2 is greater than the number of first smoke inlets 220 near the top of the lower exhaust shell 2. In other embodiments, the opening of the first smoke inlet 220 near the bottom of the lower exhaust shell 2 can also be set to be larger than the opening of the first smoke inlet 220 near the top of the lower exhaust shell 2. In this way, from the perspective of the number and / or the size of the opening, the smoke intake range of the first smoke inlets 220 of the lower exhaust shell 2 shrinks from the bottom to the top, ensuring that the closer to the stove, the larger the smoke intake range, and the stronger the oil fume capture ability, preventing the oil fume from continuously spreading (i.e., the oil fume on the surface of the stove is sucked away from the first smoke inlet 220 before it has a chance to spread). The lower exhaust shell 2 forms multiple layers of first smoke inlets 220 from the bottom to the top, ensuring that when a large area of ​​oil fume is generated, it can be effectively captured in the vertical range.

[0069] Similarly, in other embodiments, along the exhaust direction A, the number of second smoke inlets 230 near the bottom of the lower exhaust shell 2 can be greater than the number of second smoke inlets 230 near the top of the lower exhaust shell 2. The opening of the second smoke inlets 230 near the bottom of the lower exhaust shell 2 can also be set larger than the opening of the second smoke inlets 230 near the top of the lower exhaust shell 2. From the perspective of the number and / or opening size, the smoke intake range of the second smoke inlets 230 of the lower exhaust shell 2 narrows from bottom to top, ensuring that the closer to the stove, the larger the smoke intake range and the stronger the oil fume capture ability, preventing the continuous diffusion of oil fumes (i.e., the oil fumes on the stove surface are sucked away from the second smoke inlets 230 before they have a chance to diffuse). The lower exhaust shell 2 forms multiple layers of second smoke inlets 230 from bottom to top, ensuring that when a large area of ​​oil fumes is generated, they can be effectively captured in the vertical range.

[0070] The oil fume duct structure also includes wing plates 3 respectively located on the same side of the two first side surfaces 22. The two wing plates 3 are respectively arranged opposite to the two stoves. The range hood 1 includes two smoke baffles 5 forming a smoke collection chamber 4. Each wing plate 3 is spaced apart below the corresponding smoke baffle 5. Each smoke baffle 5 has at least one smoke collection port 52 that communicates with the smoke collection chamber 4.

[0071] Specifically, such as Figure 3-5 As shown, in this embodiment, the wing plate 3 is a flat metal plate, inclined with the left side higher than the right side, meaning the end of the wing plate 3 furthest from the lower air-probing shell 2 (outer side) is higher than the end of the wing plate 3 connected to the lower air-probing shell 2 (inner side). The end of the wing plate 3 connected to the lower air-probing shell 2 has a small arc-shaped structure, and the wing plate 3 is embedded in the groove on the side of the lower air-probing shell 2 through the small arc-shaped structure, forming a detachable connection on the inner side; the end of the wing plate 3 furthest from the lower air-probing shell 2 (outer side) is provided with an elastic opening and closing structure 31, which is connected to the male end 51 on the surface of the smoke baffle 5 by a snap-fit ​​connection, forming a detachable connection on the outer side for easy cleaning. The smoke baffle 5 is also an inclined metal plate, and each smoke baffle 5 has two slender smoke collection ports 52, and the internal cavity closed by the smoke baffle 5 is the smoke collection chamber 4.

[0072] Through the aforementioned arrangement of the wing plates 3, the rising fumes collide with and are adsorbed onto the surface of the wing plates 3, generating a wall adsorption effect. The fumes flow along the surface of the wing plates 3 and are then drawn into the range hood 1 by the smoke collection port 52 of the smoke collection chamber 4. In other words, the wing plates 3 enhance the adsorption capacity of the fumes, thereby improving the fume extraction effect. Furthermore, by positioning the wing plates 3 at intervals below the smoke baffle 5, the fumes form a meandering flow path between the wing plates 3 and the smoke baffle 5, rather than being directly drawn into the smoke collection chamber 4. This allows more of the rising fumes to generate a wall adsorption effect with the wing plates 3, making them less likely to escape.

[0073] In other embodiments, the number of smoke collection ports 52 on each smoke baffle 5 can be adjusted as needed, but preferably, the number of smoke collection ports 52 on each smoke baffle 5 does not exceed two; on the one hand, this makes it difficult for oil fumes to pass through the smoke collection ports 52, forming resistance, ensuring that more oil fume airflow is distributed downwards and absorbed by the downward-probing shell 2, ensuring the effect of the downward-probing shell 2 as the main smoke extraction unit; on the other hand, the amount of oil fumes reaching the smoke collection chamber 4 has been greatly reduced, so there is no need for a large area of ​​smoke collection ports 52 to capture oil fumes.

[0074] In other embodiments, the inner end of the wing plate 3 can also be detachably connected to the smoke baffle 5 according to structural connection requirements, so that both ends can be detachably connected, which is convenient for cleaning.

[0075] Example 2

[0076] like Figure 6-9 As shown, this embodiment provides an oil fume collection device, which includes an oil fume collection duct structure as in Embodiment 1 and a first oil cup 6. The range hood 1 includes a plurality of upper oil leakage holes 8 arranged around the top of the lower air probe shell 2 and connected to the smoke collection chamber 4. The first oil cup 6 is arranged around the top of the lower air probe shell 2 and is detachably connected to the lower air probe shell 2. The opening of the first oil cup 6 is arranged opposite to the plurality of upper oil leakage holes 8.

[0077] Specifically, in this embodiment, the first oil cup 6 is a U-shaped oil cup. A groove is provided on the side wall of the first oil cup 6, and a slide rail is provided on the first side surface 22 of the lower air probe shell 2 at a position corresponding to the groove. The first oil cup 6 is snapped into the lower air probe shell 2 via a sliding fastener to collect the dripping sludge from the smoke collection chamber 4. In other embodiments, there are various ways to achieve a detachable connection between the first oil cup 6 and the lower air probe shell 2, and it is not limited to the sliding fastener method of this embodiment.

[0078] This fume collection device, through its aforementioned fume collection duct structure, can pre-extract fumes from the surface of the stove, preventing fumes from escaping due to diffusion during their ascent, thus improving extraction efficiency and fume removal effect. The first oil cup 6, as described above, simultaneously collects fumes gathered around the top of the lower air probe shell 2 within the fume collection chamber 4, promptly gathering the fumes at the top. The first oil cup 6 is detachably connected to the lower air probe shell 2, facilitating its removal and cleaning.

[0079] As shown in Embodiment 8, the fume collection duct structure further includes wing plates 3 respectively disposed on the first side 22. The two wing plates 3 are respectively disposed opposite to the two stoves. The range hood 1 includes two baffle plates 5 forming the fume collection chamber 4. Each wing plate 3 is spaced apart below the corresponding baffle plate 5. The wing plates 3 are inclined from the far end away from the lower air-expanding shell 2 to the near end close to the lower air-expanding shell 2, and the height of the wing plate 3 at the far end is higher than the height of the wing plate 3 at the near end. The upper oil leakage hole 8 includes an oil leakage hole 81 on the front edge above the second side 23 on the connecting plate between the two baffle plates 5 and an oil leakage hole 82 on the side edge of the wing plate 3 close to the first side 22. Through the wing plates 3 and the oil leakage holes 82 on their sides, the oil fumes collected on the wing plates 3 are ensured to be collected. Through the oil leakage holes 81 on the front edge, the oil fumes collected on the baffle plates 5 on both sides are ensured to be collected. Thus, oil fumes can be effectively collected on different sides around the top of the lower air-expanding shell 2.

[0080] like Figure 6 , Figure 10 and Figure 11 As shown, the oil fume collection device also includes a second oil cup 7. The bottom of the lower air probe shell 2 is provided with several lower oil leakage holes 9. The second oil cup 7 is located at the bottom of the lower air probe shell 2 and is detachably connected to the lower air probe shell 2. The opening of the first oil cup 6 surrounds the bottom of the lower air probe shell 2 and is arranged opposite to the several lower oil leakage holes 9.

[0081] Specifically, in this embodiment, the second oil cup 7 contains magnetic material. Since the lower air probe shell 2 is made of metal, the second oil cup 7 can be magnetically adsorbed onto the bottom surface of the lower air probe shell 2, achieving a detachable connection. Furthermore, the magnetic adsorption of the second oil cup 7 onto the bottom surface of the lower air probe shell 2 simplifies disassembly. In other embodiments, the second oil cup 7 and the bottom of the lower air probe shell 2 can also employ other detachable connection methods.

[0082] The fume collection device effectively collects the fumes in the lower air duct 21 around the bottom of the lower air duct 2 through the second oil cup 7, which can clean the fumes in the bottom of the lower air duct 2 in a timely manner.

[0083] In other embodiments, the oil fume collection device may also omit the second oil cup 7, and the lower air probe shell 2 may be detachably connected to the smoke baffle 5 or other connecting parts of the range hood 1, and the space below the smoke inlet of the lower air probe shell 2 may be used as a space for collecting oil. When the oil is full, the lower air probe shell 2 may be disassembled and the oil may be emptied.

[0084] Example 3

[0085] This embodiment provides a range hood 1, which includes an oil fume collection device as described in Embodiment 2. Through the oil fume collection device as described in Embodiment 2, the range hood 1 can pre-extract oil fumes from the surface of the cooktop, preventing fumes from escaping due to diffusion during their ascent, thus improving extraction efficiency and fume removal effect; furthermore, the oil cup effectively collects the oil fumes within the fume collection chamber 4, keeping the chamber clean.

[0086] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A cooking fume collecting duct structure for collecting cooking fume generated from a cooking range, characterized by comprising: The oil fume collecting air duct structure comprises at least one downwardly extending air casing installed below the range hood and extending downwardly to a surface close to the cooking top, and the air casing comprises a downwardly extending air duct in communication with a fume collecting cavity of the range hood; At least two sides of the downwardly extending air casing are inclined downwardly and inwardly in a direction opposite to the fume exhaust direction, so that the downwardly extending air duct forms a structure with a large upper part and a small lower part in the fume exhaust direction; The sides are provided with a plurality of fume inlets.

2. The cooking fume collecting duct structure according to claim 1, wherein The downwardly extending air casing is arranged at a middle position between two cooking eyes of the cooking top; And / or, the sides comprise at least two opposite first sides and at least two second sides adjacent to the two first sides, and the two first sides and the two second sides are both inclined downwardly and inwardly in a direction opposite to the fume exhaust direction.

3. The cooking fume collecting duct structure according to claim 1, wherein In the fume exhaust direction, the number of the fume inlets close to the bottom of the downwardly extending air casing is greater than the number of the fume inlets close to the top of the downwardly extending air casing, and / or, The opening of the fume inlets close to the bottom of the downwardly extending air casing is greater than the opening of the fume inlets close to the top of the downwardly extending air casing.

4. The cooking fume collecting duct structure according to claim 2, wherein The two first sides respectively face two cooking eyes on the cooking top, the oil fume collecting air duct structure is respectively provided with wing plates above the two cooking eyes, the range hood comprises two fume blocking plates forming the fume collecting cavity, each wing plate is arranged below the corresponding fume blocking plate in a spaced manner, and at least one fume collecting opening of the fume collecting cavity is formed in each fume blocking plate.

5. The cooking fume exhaust duct structure according to claim 4, wherein The number of the fume collecting openings on each fume blocking plate is not more than two; And / or, a distal end of the wing plate away from the downwardly extending air casing is detachably connected with the fume blocking plate, and a proximal end of the wing plate close to the downwardly extending air casing is detachably connected with the casing of the downwardly extending air casing or the fume blocking plate.

6. An oil fume collecting device characterized by comprising: The oil fume collecting device comprises the oil fume collecting air duct structure and a first oil cup according to any one of claims 1-5, The range hood comprises a plurality of upper oil leakage holes arranged around the top of the downwardly extending air casing and in communication with the fume collecting cavity, the first oil cup is arranged around the top of the downwardly extending air casing and detachably connected with the downwardly extending air casing, and the opening of the first oil cup is arranged opposite to the plurality of upper oil leakage holes.

7. The cooking fume collecting device as claimed in claim 6, wherein The downwardly extending air casing comprises at least two opposite first sides and at least two second sides adjacent to the two first sides, the two first sides respectively face two cooking eyes on the cooking top, the oil fume collecting air duct structure is respectively provided with wing plates above the two cooking eyes, the range hood comprises two fume blocking plates forming the fume collecting cavity, each wing plate is arranged below the corresponding fume blocking plate in a spaced manner; the wing plate is arranged in an inclined manner from a distal end away from the downwardly extending air casing to a proximal end close to the downwardly extending air casing, and the height of the distal end of the wing plate is higher than the height of the proximal end of the wing plate; The upper oil leakage holes comprise positive upper oil leakage holes arranged on a connecting plate between the two fume blocking plates and located on the upper side of the second side, and side upper oil leakage holes arranged on the wing plate and close to the first side.

8. The cooking fume collecting device as claimed in claim 6, wherein The oil collecting device further comprises a second oil cup, the bottom of the lower air baffle is provided with a plurality of lower oil leakage holes, the second oil cup is arranged at the bottom of the lower air baffle and detachably connected with the lower air baffle, and the opening of the first oil cup surrounds the bottom of the lower air baffle and is arranged opposite to the plurality of lower oil leakage holes.

9. The cooking fume collecting device according to claim 8, wherein The second oil cup is provided with a magnetic material, the lower air baffle is made of metal, and the second oil cup is magnetically attached to the bottom surface of the lower air baffle.

10. A range hood characterized by The range hood comprises the oil collecting device according to any one of claims 6-9.

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