A range hood

Abstract

The present invention relates to the technical field of kitchen appliances, and discloses an oil fume extractor, which includes a housing and a flap assembly. A smoke exhaust cavity and a makeup air cavity are defined independently within the housing. A smoke exhaust pipe is communicated with the smoke exhaust cavity, and a makeup air pipe is communicated with the makeup air cavity. The flap assembly includes a flap rotatably arranged on the front side of the housing. The flap is of a hollow structure, and a makeup air channel is defined therein. Fresh air outdoors can enter the smoke suction cavity of the oil fume extractor through the makeup air pipe, the makeup air cavity and the makeup air channel to supply makeup air to the oil fume extractor, thereby improving the smoke exhaust effect. Since the makeup air cavity and the smoke exhaust cavity are independent of each other, the fresh air will not interfere with smoke suction. Since the makeup air outlet of the makeup air channel faces the smoke suction cavity, the air blown out through the makeup air outlet can guide the oil fume to flow into the smoke suction cavity, so as to generate an ejection effect on the oil fume, prevent the oil fume from escaping, and further improve the smoke exhaust effect. When the oil fume extractor is not in use, the flap can be rotated and stored at the bottom of the housing, saving floor space and ensuring the cleanliness and beauty of the kitchen.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and in particular to a range hood. Background Art

[0002] Traditional range hoods usually only have the function of sucking oil fumes. The cavity of the range hood is used for air intake, and the exhaust pipe is connected to the common flue for exhausting oil fumes. When the kitchen doors and windows are closed, the area of the air intake passage decreases, and the air can only enter the kitchen through the gaps in the doors and windows, etc. The air intake resistance becomes larger, and the air intake direction is uncontrollable, which is likely to blow onto the rising oil fumes and affect the oil fume suction effect of the range hood.

[0003] In order to improve the exhaust effect, the prior art increases the motor power of the range hood to increase the suction force and improve the exhaust effect. However, the motor power and the exhaust effect are not in a direct proportional relationship. When the motor power reaches a certain value, further increasing the motor power cannot improve the exhaust effect, that is, the oil fume suction effect cannot reach the best.

[0004] Existing range hoods also improve the exhaust effect by setting an external air intake duct on the ceiling for air supply. However, since the air supply opening is arranged inside the cabinet and is not combined with the range hood, the air supply will instead interfere with the oil fumes, resulting in the oil fumes not being effectively absorbed.

[0005] For existing European-style range hoods, although there is a flap set at the front end for gathering oil fumes, the flap can only passively block the oil fumes, and some oil fumes with greater kinetic energy will still escape.

[0006] Therefore, there is an urgent need for a range hood to solve the above problems. Summary of the Invention

[0007] Based on the above problems, the purpose of the present invention is to provide a range hood that can reduce the air intake resistance of the range hood, improve the smoking and exhaust effects of the range hood, and prevent oil fumes from escaping.

[0008] To achieve the above object, the present invention adopts the following technical solutions:

[0009] Provide a range hood, comprising:

[0010] A housing, an independent exhaust cavity and a makeup air cavity are defined in the housing, an exhaust pipe and a makeup air pipe are arranged on the housing, the exhaust pipe is communicated with the exhaust cavity, and the makeup air pipe is communicated with the makeup air cavity;

[0011] A flap assembly, including a flap, the flap is rotatably arranged on the front side of the housing, and the flap is configured to be able to rotate and unfold or rotate and be received at the bottom of the housing;

[0012] The flap is of a hollow structure, and an air supply replenishment channel is defined therein. One end of the air supply replenishment channel communicates with the air supply replenishment cavity, and the other end is an air supply replenishment outlet which faces the smoke suction cavity of the range hood.

[0013] As a preferred embodiment of the range hood of the present invention, the flap assembly further includes a driving member and a transmission link mechanism. One end of the transmission link mechanism is connected to the output end of the driving member, and the other end is connected to the flap. The driving member is configured to be able to drive the flap to rotate through the transmission link mechanism.

[0014] As a preferred embodiment of the range hood of the present invention, the transmission link mechanism includes a telescopic rod, a first rod and a second rod which are hinged to each other. A rotating shaft is provided on the flap. The first rod is rotatably connected to the telescopic rod, and the second rod is fixedly connected to the rotating shaft. The driving member drives the telescopic rod to expand and contract, so that the first rod and the second rod drive the flap to rotate.

[0015] As a preferred embodiment of the range hood of the present invention, the range hood further includes a filtering device which is arranged in the air supply replenishment cavity and is used for filtering impurities in the fresh air.

[0016] As a preferred embodiment of the range hood of the present invention, the filtering device includes a mounting bracket and a filter element fixed on the mounting bracket. The mounting bracket and the filter element divide the air supply replenishment cavity into a first cavity and a second cavity. The air supply pipe communicates with the first cavity, and the air supply replenishment channel communicates with the second cavity.

[0017] As a preferred embodiment of the range hood of the present invention, the range hood further includes a flexible pipe. One end of the flexible pipe communicates with the second cavity, and the other end communicates with the air supply replenishment channel.

[0018] As a preferred embodiment of the range hood of the present invention, the range hood further includes an air supply fan arranged in the housing. The air inlet of the air supply fan communicates with the air supply pipe, and the air outlet of the air supply fan communicates with the air supply replenishment cavity.

[0019] As a preferred embodiment of the range hood of the present invention, the range hood further includes a decorative cover arranged on the top of the housing. The air supply pipe and the smoke exhaust pipe are integrally installed on the housing through the decorative cover.

[0020] As a preferred embodiment of the range hood of the present invention, the range hood further includes a baffle and a filter net. The baffle is arranged in the smoke suction cavity, and the filter net is arranged on the baffle and is located on the side of the baffle facing the smoke suction cavity.

[0021] As a preferred embodiment of the range hood of the present invention, the range hood further includes an exhaust fan disposed in the exhaust cavity. The air inlet of the exhaust fan is communicated with the smoking cavity, and the air outlet of the exhaust fan is communicated with the exhaust pipe.

[0022] The beneficial effects of the present invention are as follows:

[0023] For the range hood provided by the present invention, when the kitchen is in a negative pressure state, fresh air outdoors can enter the smoking cavity of the range hood through the air supply pipe, the air supply cavity, and the air supply channel in the flap, so as to supply air to the range hood, thereby effectively improving the smoking and exhaust effects of the range hood. Since the air supply cavity and the exhaust cavity in the housing are independent of each other, the supplemented fresh air will not interfere with the smoking of the range hood. At the same time, since the air supply outlet of the air supply channel faces the smoking cavity, during the air supply process, the air blown out from the air supply outlet can guide the oil fume to flow into the smoking cavity, thereby generating an ejecting effect on the rising oil fume, so that all the oil fume is sucked into the exhaust cavity to prevent the oil fume from escaping and further improving the exhaust effect. In addition, by adjusting the rotation angle of the flap, the air outlet direction of the air supply outlet can be adjusted, so as to better gather the oil fume generated during cooking into the smoking cavity. When the flap is unfolded outward, it can play a role in gathering the fume. At the same time, when the range hood is not in use, the flap can be rotated and stored at the bottom of the housing, that is, in the smoking cavity, saving floor space and ensuring the kitchen is clean and beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the embodiments of the present invention and these drawings.

[0025] Figure 1 It is the first structural schematic diagram of the range hood provided by the specific embodiment of the present invention;

[0026] Figure 2 It is the second structural schematic diagram of the range hood provided by the specific embodiment of the present invention (hiding the exhaust pipe and the air supply pipe);

[0027] Figure 3 It is the structural schematic diagram of the range hood after the flap is stored;

[0028] Figure 4 It is the structural schematic diagram of the range hood after the flap is unfolded;

[0029] Figure 5 It is the internal structural schematic diagram of the range hood provided by the specific embodiment of the present invention;

[0030] Figure 6 It is a schematic diagram of the flow of oil fume and fresh air inside the range hood provided by the specific embodiment of the present invention.

[0031] In the figure:

[0032] 1 - housing; 2 - flap assembly; 3 - filtering device; 4 - flexible pipe; 5 - make-up air fan; 6 - decorative cover; 7 - baffle; 8 - filter net; 9 - exhaust fan;

[0033] 11 - exhaust cavity; 12 - make-up air cavity; 13 - exhaust pipe; 14 - make-up air pipe; 15 - smoking cavity;

[0034] 121 - first cavity; 122 - second cavity;

[0035] 21 - flap; 22 - driving member; 23 - transmission link mechanism;

[0036] 211 - make-up air channel; 2111 - make-up air outlet; 212 - rotating shaft;

[0037] 231 - telescopic rod; 232 - first rod; 233 - second rod;

[0038] 31 - mounting bracket; 32 - filter element. Specific Embodiment

[0039] To make the technical problems solved by the present invention, the technical solutions adopted and the achieved technical effects clearer, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

[0040] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention 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, and therefore cannot be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0042] As Figures 1 to 6 shown, this embodiment provides a range hood, which includes a housing 1 and a flap assembly 2.

[0043] Wherein, an independent exhaust smoke chamber 11 and a makeup air chamber 12 are defined inside the housing 1. An exhaust pipe 13 and a makeup air pipe 14 are arranged on the housing 1. The exhaust pipe 13 is communicated with the exhaust smoke chamber 11, and the makeup air pipe 14 is communicated with the makeup air chamber 12. One end of the exhaust pipe 13 extending out of the housing 1 can be connected to a common flue to discharge the cooking fumes in the kitchen to the outside. One end of the makeup air pipe 14 extending out of the housing 1 extends to the outside so that the fresh air outside can smoothly enter the makeup air chamber 12. The flap assembly 2 includes a flap 21, and the flap 21 is rotatably arranged on the front side of the housing 1. The flap 21 is configured to be able to rotate and unfold or rotate and retract to the bottom of the housing 1. When the user uses the range hood for cooking, the flap 21 rotates and unfolds to achieve smoke collection. After the range hood is used up, the flap 21 rotates and retracts to the bottom of the housing 1 to save floor space. Further, the flap 21 is a hollow structure, and a makeup air channel 211 is defined therein. One end of the makeup air channel 211 is communicated with the makeup air chamber 12, and the other end is a makeup air outlet 2111. The makeup air outlet 2111 faces the smoke suction chamber 15 of the range hood. The fresh air outside can be sequentially introduced into the smoke suction chamber 15 through the makeup air pipe 14, the makeup air chamber 12, and the makeup air channel 211 to achieve makeup air.

[0044] The range hood provided in this embodiment allows fresh air from the outside to enter the smoking cavity 15 of the range hood through the air supply duct 14, the air supply cavity 12, and the air supply channel 211 in the flap 21 when the kitchen is in a negative pressure state, so as to supply air to the range hood, thereby effectively improving the smoking and exhaust effects of the range hood. Since the air supply cavity 12 and the exhaust cavity 11 in the housing 1 are independent of each other, the supplemented fresh air will not interfere with the smoking of the range hood. At the same time, since the air supply outlet 2111 of the air supply channel 211 faces the smoking cavity 15, during the air supply process, the air blown out from the air supply outlet 2111 can guide the cooking fumes to flow into the smoking cavity 15, thereby generating an entrainment effect on the rising cooking fumes to entrain all the cooking fumes into the exhaust cavity 11 and prevent the cooking fumes from escaping, further improving the exhaust effect. In addition, by adjusting the rotation angle of the flap 21, the blowing direction of the air supply outlet 2111 can be adjusted, so as to better gather the cooking fumes generated during cooking into the smoking cavity 15. When the flap 21 is unfolded outward, it can play a role in gathering the fumes. At the same time, when the range hood is not in use, the flap 21 can be rotated and stored at the bottom of the housing 1, that is, inside the smoking cavity 15, saving floor space and ensuring the kitchen is clean and beautiful.

[0045] Optionally, referring to Figure 3 , Figure 4 and Figure 5 , the flap assembly 2 further includes a driving member 22 and a transmission link mechanism 23. One end of the transmission link mechanism 23 is connected to the output end of the driving member 22, and the other end is connected to the flap 21. The driving member 22 is configured to be able to drive the flap 21 to rotate through the transmission link mechanism 23 to adjust the rotation angle of the flap 21, thereby adjusting the blowing direction of the air supply outlet 2111 and preventing the supplemented fresh air from interfering with the absorption of cooking fumes. The arrangement of the driving member 22 and the transmission link mechanism 23 enables the flap 21 to be unfolded to different angles according to cooking needs, thereby effectively improving the smoking effect of the range hood. When the range hood is not in use, it can drive the flap 21 to rotate and be stored in the smoking cavity 15, which is convenient to use, does not occupy kitchen space, and provides a good user experience.

[0046] Optionally, referring to Figure 3 and Figure 4 , the transmission link mechanism 23 includes a telescopic rod 231 and a first rod 232 and a second rod 233 that are hinged to each other. A rotating shaft 212 is provided on the flap 21. The first rod 232 is rotatably connected to the telescopic rod 231, and the second rod 233 is fixedly connected to the rotating shaft 212. The driving member 22 drives the telescopic rod 231 to expand and contract, so that the first rod 232 and the second rod 233 drive the flap 21 to rotate. In this embodiment, rotating shafts 212 are provided at both ends of the flap 21, and the rotating shafts 212 are rotatably connected to the inner wall of the housing 1. The second rod 233 is fixedly connected to the rotating shaft 212 at one end of the flap 21. In the initial state, as Figure 3As shown, the flap 21 is stored in the smoke suction cavity 15 of the range hood. When the flap 21 needs to be deployed, the driving member 22 drives the telescopic rod 231 to retract, and at the same time drives the first rod 232 to move backward. The first rod 232 pulls the second rod 233 to rotate, thereby driving the flap 21 to rotate relative to the housing 1 in the deployment direction through the rotating shaft 212. Figure 4 The state shown is the state after the flap 21 is fully deployed. Preferably, the first rod 232 is a curved rod, which can better control the deployment angle of the flap 21.

[0047] In this embodiment, as Figure 5 shown, the driving member 22 is installed on the rear side wall of the housing 1 through a fixing seat. The driving member 22 is preferably a motor. The output shaft of the motor and the telescopic rod 231 can be connected through a gearbox and a lead screw nut mechanism to realize the telescoping of the telescopic rod 231, or can also be connected through a worm and worm gear transmission mechanism and a lead screw nut mechanism to realize the telescoping of the telescopic rod 231. In other embodiments, the telescoping of the telescopic rod 231 can also be directly realized through a cylinder or a hydraulic cylinder mechanism, as long as it can drive the flap 21 to rotate.

[0048] Optionally, referring to Figure 3 、 Figure 4 and Figure 5 the range hood further includes a filtering device 3, and the filtering device 3 is arranged in the air supply replenishment cavity 12. The filtering device 3 is used to filter impurities in the fresh air, preventing large impurities carried in the fresh air from blocking the air supply replenishment channel 211 in the flap 21 due to accumulation, and ensuring the reliability of the use of the range hood.

[0049] Optionally, referring to Figure 4 and Figure 5 the filtering device 3 includes a mounting bracket 31 and a filter element 32 fixed on the mounting bracket 31. The mounting bracket 31 and the filter element 32 divide the air supply replenishment cavity 12 into a first cavity 121 and a second cavity 122. The air supply pipe 14 is communicated with the first cavity 121, and the air supply replenishment channel 211 of the flap 21 is communicated with the second cavity 122. In this embodiment, the filter element 32 is a rectangular structure, and the mounting bracket 31 is a rectangular plate structure with a rectangular mounting hole opened in the middle. The rectangular filter element 32 is installed in the rectangular mounting hole. The four sides of the mounting bracket 31 are respectively connected to the side walls of the air supply replenishment cavity 12 to divide the air supply replenishment cavity 12 into a first cavity 121 and a second cavity 122. The unfiltered fresh air can only reach the first cavity 121, and the filtered fresh air can only pass through the second cavity 122 into the air supply replenishment channel 211, thereby preventing the air supply replenishment channel 211 from being blocked.

[0050] Optionally, referring to Figure 3 and Figure 4The range hood further comprises a flexible tube 4, one end of which is connected to the second cavity 122, and the other end of which is connected to the air supply channel 211. When the flap 21 rotates, the flexible tube 4 can bend and deform adaptively, which can maintain the connection between the air supply cavity 12 and the air supply channel 211 without affecting the rotation of the flap 21.

[0051] Continue reading Figure 3 and Figure 4 Optionally, the range hood further comprises an air supply fan 5 disposed in the housing 1, the air inlet of the air supply fan 5 being connected to the air supply pipe 14, and the air outlet of the air supply fan 5 being connected to the air supply chamber 12. The air supply fan 5 can actively introduce outdoor air into the air supply chamber 12, and then supply air to the smoking chamber 15 via the flexible pipe 4 and the air supply channel 211. In other words, when the kitchen is not in a negative pressure state, the air supply fan 5 can also be started to supply air to the range hood, so as to form an introduction for the rising oil smoke, and introduce the oil smoke into the smoking chamber 15, thereby improving the smoke exhaust effect of the range hood.

[0052] like Figure 6 As shown, the air supply fan 5 can pass the outdoor fresh air into the first cavity 121 of the air supply cavity 12. The fresh air filtered by the filter element 32 enters the second cavity 122 and is blown to the smoking cavity 15 through the flexible tube 4, the air supply channel 211 and the air supply outlet 2111 in sequence, so as to supply air to the range hood and improve the smoking effect. While supplying air, the oil smoke generated by cooking continuously enters the smoking cavity 15 driven by the fresh air, which can prevent the oil smoke from escaping. The flow direction of the fresh air and the flow direction of the oil smoke are shown in FIG. Figure 6 As shown in the direction of the arrows, the solid arrows represent the direction of fresh air flow, and the dotted arrows represent the direction of oil smoke flow.

[0053] In this embodiment, the fresh air blown out of the air supply outlet 2111 is always controlled at Figure 6 In the range indicated by the midpoint dashed arrow, it will only have an entraining effect on the rising oil smoke, but will not blow the oil smoke away, effectively improving the smoke exhaust capacity of the range hood. Preferably, when the flap 21 is unfolded to the maximum, the wind blown out by the air supply outlet 2111 has the largest entraining range, and the rising oil smoke is mainly guided within the extreme angle range closest to the side of the smoking chamber 15, and the smoke exhaust effect is good.

[0054] Optionally, see Figure 1 and Figure 2 The range hood further includes a decorative cover 6 disposed on the top of the housing 1, and the air supply pipe 14 and the smoke exhaust pipe 13 are integrated and installed on the housing 1 through the decorative cover 6. The decorative cover 6 is provided so that the air supply pipe 14 and the smoke exhaust pipe 13 are integrated with the housing 1 of the range hood, thereby optimizing the pipeline arrangement of the range hood, avoiding the air supply pipe 14 from occupying additional cabinet space, facilitating installation, and making the overall layout of the kitchen more beautiful.

[0055] Optionally, refer to Figure 3 , Figure 4 and Figure 5 , the range hood further includes an exhaust fan 9 disposed in the exhaust cavity 11. The air inlet of the exhaust fan 9 is communicated with the smoke suction cavity 15, and the air outlet of the exhaust fan 9 is communicated with the exhaust pipe 13. After the exhaust fan 9 is started, a negative pressure is generated in its volute, so as to continuously suck the cooking fumes generated and discharge them out of the kitchen through the exhaust pipe 13.

[0056] Optionally, refer to Figure 2 and Figure 5 , the range hood further includes a baffle 7 and a filter net 8. The baffle 7 is disposed in the smoke suction cavity 15, and the filter net 8 is disposed on the baffle 7 and is located on the side of the baffle 7 facing the smoke suction cavity 15. The main function of the baffle 7 is to guide the fumes and condense the fumes, so that the fumes can be quickly discharged by the exhaust fan 9, and at the same time, the situation of fume backflow can be avoided, improving the air quality in the kitchen. The filter net 8 can filter out large particle impurities carried in the fumes, preventing the intake of blockages into the exhaust cavity 11 and causing blockage of the exhaust pipe 13. At the same time, part of the oil stains can be condensed on the filter net 8 to reduce the amount of oil stains condensed in the exhaust cavity 11 and the exhaust fan 9, facilitating later cleaning.

[0057] Note that the above is only the preferred embodiment of the present invention and the applied technical principle. Those skilled in the art will understand that the present invention is not limited to the specific embodiments here. Various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments only. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An oil fume extractor, characterized in that, Comprising: A housing (1), an independent exhaust smoke chamber (11) and a make-up air chamber (12) are defined inside the housing (1), an exhaust smoke pipe (13) and a make-up air pipe (14) are arranged on the housing (1), the exhaust smoke pipe (13) is communicated with the exhaust smoke chamber (11), and the make-up air pipe (14) is communicated with the make-up air chamber (12); A flap assembly (2), including a flap (21), the flap (21) is rotatably arranged on the front side of the housing (1), and the flap (21) is configured to be able to rotate and unfold or rotate and be received at the bottom of the housing (1); The flap (21) is of a hollow structure, and a make-up air channel (211) is defined inside it. One end of the make-up air channel (211) is communicated with the make-up air chamber (12), and the other end is a make-up air outlet (2111), and the make-up air outlet (2111) faces the smoke suction chamber (15) of the range hood; During the make-up air process, the air blown out from the make-up air outlet (2111) can guide the oil fume to flow into the smoke suction chamber (15), so as to generate an ejecting effect on the rising oil fume, so that all the oil fume is ejected and sucked into the exhaust smoke chamber (11).

2. The oil fume extractor according to claim 1, characterized in that, The flap assembly (2) further includes a driving member (22) and a transmission link mechanism (23). One end of the transmission link mechanism (23) is connected to the output end of the driving member (22), and the other end is connected to the flap (21). The driving member (22) is configured to be able to drive the flap (21) to rotate through the transmission link mechanism (23).

3. The oil fume extractor according to claim 2, characterized in that, The transmission link mechanism (23) includes a telescopic rod (231) and a first rod (232) and a second rod (233) that are hinged to each other. A rotating shaft (212) is arranged on the flap (21). The first rod (232) is rotatably connected to the telescopic rod (231), and the second rod (233) is fixedly connected to the rotating shaft (212). The driving member (22) drives the telescopic rod (231) to stretch and contract, so that the first rod (232) and the second rod (233) drive the flap (21) to rotate.

4. The oil fume extractor according to claim 1, characterized in that, The range hood further includes a filtering device (3), and the filtering device (3) is arranged in the make-up air chamber (12) for filtering impurities in the fresh air.

5. The oil fume extractor according to claim 4, characterized in that, The filtering device (3) includes a mounting bracket (31) and a filter element (32) fixed on the mounting bracket (31). The mounting bracket (31) and the filter element (32) divide the make-up air chamber (12) into a first cavity (121) and a second cavity (122). The make-up air pipe (14) is communicated with the first cavity (121), and the make-up air channel (211) is communicated with the second cavity (122).

6. The oil fume extractor according to claim 5, characterized in that, The range hood further includes a flexible pipe (4). One end of the flexible pipe (4) is communicated with the second cavity (122), and the other end is communicated with the make-up air channel (211).

7. The oil fume extractor according to any one of claims 1-6, characterized in that, The range hood further includes a make-up air fan (5) disposed in the housing (1). The air inlet of the make-up air fan (5) is communicated with the make-up air duct (14), and the air outlet of the make-up air fan (5) is communicated with the make-up air cavity (12).

8. The oil fume extractor according to any one of claims 1-6, characterized in that, The range hood further includes a decorative cover (6) disposed on the top of the housing (1). The make-up air duct (14) and the exhaust duct (13) are integrally installed on the housing (1) through the decorative cover (6).

9. The oil fume extractor according to any one of claims 1-6, characterized in that, The range hood further includes a baffle (7) and a filter net (8). The baffle (7) is disposed in the smoking cavity (15), and the filter net (8) is disposed on the baffle (7) and located on the side of the baffle (7) facing the smoking cavity (15).

10. The oil fume extractor according to any one of claims 1-6, characterized in that, The range hood further includes an exhaust fan (9) disposed in the exhaust cavity (11). The air inlet of the exhaust fan (9) is communicated with the smoking cavity (15), and the air outlet of the exhaust fan (9) is communicated with the exhaust duct (13).

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