Range hood

Abstract

The utility model discloses a range hood which comprises a box body, a smoke inlet, a smoke outlet and a smoke outlet, the oil guide plate is arranged in the box body; the fan system is also arranged in the box body and is positioned on the rear side of the oil guide plate; the oil guide plate comprises a first oil guide part and a second oil guide part, the first oil guide part extends from front to back, the second oil guide part extends downwards from the rear side end of the first oil guide part, and the second oil guide part is matched with a fan system; the first oil guide part comprises a first folding edge and a second folding edge which are arranged front and back, and the first folding edge and the second folding edge jointly form a V shape bent downwards.

Description

TECHNICAL FIELD

[0001] The utility model relates to an oil fume purification device, especially an oil fume extractor. BACKGROUND

[0002] The oil fume extractor has become one of the kitchen household electrical appliances in modern families. Usually, the oil fume extractor includes a top suction type and a side suction type. The oil fume extractor of the side suction type utilizes the vortex wind pressure principle to suck most of the oil fume close to the cooking bench in an arc form, which can reduce the adverse effect on human health, and the power source is close to the cooking bench, which basically does not reduce the suction effect of the power source.

[0003] The oil guide plate is connected with multiple components and exchanges energy in the oil fume extractor. The oil guide plate exchanges smoke and oil stains with the air inlet. The oil guide plate is physically connected with the fan system and exchanges smoke and oil stains. The oil guide plate is physically connected with the box. The oil guide plate exchanges oil stains with the oil cup. Therefore, the design of the oil guide plate plays an important role in the performance, oil circuit, rigidity and other aspects of the oil fume extractor.

[0004] The existing side suction type oil fume extractor, such as the oil fume extractor disclosed in the Chinese patent with the application number 201810509576.9 of the applicant, includes a casing, a panel, an oil guide plate and a fan system with a motor. The panel and the oil guide plate are respectively and obliquely arranged between the left and right side plates of the casing. The panel is located in front of the oil guide plate and is spaced apart from the oil guide plate. An air inlet is formed in the panel. A smoke baffle is rotatably installed on the air inlet. An air suction opening is formed in the oil guide plate. The air inlet of the fan system is installed in the air suction opening.

[0005] The oil fume extractor is usually applied in North America. Because the distance between the cooking burner and the wall is far, the air inlet is arranged at the upper part of the oil fume extractor. The under-cabinet machine requires that the fan system of the oil fume extractor must be inside the box and cannot be higher than the top plate. There is a wedge angle between the oil guide plate and the lower panel of the oil fume extractor. When the oil fume passes through the oil guide plate space from the air inlet to the inlet of the fan system, the fluid cavity wedge angle near the fan system generates vortex. Referring to Figure 10 Therefore, the performance of the oil fume extractor is negatively affected.

[0006] In addition, the oil fume extractor hung in some user's home may slightly lean forward, so that the oil guide plate is inclined and the front side is lower than the rear side. Therefore, the oil on the oil guide plate flows forward to the upper part of the air inlet and then drips from the air inlet, which reduces the use experience of the oil fume extractor for customers. INVENTION CONTENTS

[0007] The first technical problem to be solved by the utility model is to provide an oil fume extractor to avoid that the oil drops on the top of the oil guide plate penetrate into the smoke inlet.

[0008] The second technical problem to be solved by the utility model is to provide a range hood to improve vortex and improve the performance of the whole machine.

[0009] The utility model adopts the technical scheme that a range hood comprises:

[0010] The box body is provided with a smoke inlet on the front side;

[0011] The oil guide plate is arranged in the box body; and

[0012] The fan system is also arranged in the box body and located at the rear side of the oil guide plate.

[0013] The oil guide plate comprises a first oil guide part and a second oil guide part, the first oil guide part extends from front to back, the second oil guide part extends downward from the rear end of the first oil guide part, and the second oil guide part cooperates with the fan system; characterized in that:

[0014] The first oil guide part comprises a first folded edge and a second folded edge arranged in front and back, and the first folded edge and the second folded edge jointly form a V-shaped downward bend.

[0015] By making the top of the oil guide plate V-shaped, the oil on the top of the oil guide plate drips from the lowest point of the V-shaped, thereby eliminating the situation that the oil on the top of the oil guide plate falls from the smoke inlet to the cooking surface; when the whole machine is inclined in the hanging state, due to the existence of the V-shaped, the oil will not be concentrated on the upper part of the smoke inlet, but will still drip from the lowest point of the V-shaped, thereby well solving the oil path problem of the range hood.

[0016] Further, the fan system has an air inlet towards the smoke inlet, and the extension line of the lower surface of the first folded edge reaches the highest point of the air inlet edge of the fan system. In this way, the first edge can better guide the oil fume into the fan system.

[0017] Further, to ensure that the oil can drip from the lowest point of the V-shaped even when the whole machine is inclined in the hanging state, the included angle between the first folded edge and the horizontal plane is α, and α≥3° is satisfied.

[0018] Preferably, to ensure that the oil dripping from the lowest point of the V-shaped will not drip through the smoke inlet, the range hood comprises a front plate, the smoke inlet is arranged on the front plate, the front plate comprises a lower panel below the lower edge of the smoke inlet, and the bent part of the first oil guide part is located within the outermost edge of the lower panel.

[0019] To further ensure the oil path, on the projection of the horizontal plane, the shortest distance between the bent part of the first oil guide part and the upper edge of the lower panel is d, and d≥10mm is satisfied.

[0020] The technical solution adopted by the present invention to solve the second technical problem is as follows: the fan system has an air inlet facing the smoke inlet, and the upper edge of the smoke inlet is higher than the upper edge of the air inlet;

[0021] The oil guide plate includes a first oil guide portion, a second oil guide portion, a third oil guide portion and a fourth oil guide portion, the first oil guide portion extends from front to rear, the second oil guide portion extends downward from the rear end portion of the first oil guide portion, the third oil guide portion is arranged at the left end portion of the first oil guide portion and the second oil guide portion, the fourth oil guide portion is arranged at the right end portion of the first oil guide portion and the second oil guide portion, the second oil guide portion cooperates with the fan system, and the third oil guide portion and the fourth oil guide portion are inclined towards each other from front to rear.

[0022] Since the oil guide portions on the two sides of the oil guide plate extend obliquely toward each other, a relative inclination is also formed between them and the corresponding sides of the box body. The inclination angles of the third and fourth oil guide portions can be limited to the plane of the second oil guide portion of the oil guide plate covering the air inlet of the fan system. This can reduce the vortex area in the inner cavity surrounded by the oil guide plate, so that the external airflow can enter the fan system more smoothly through the inner cavity surrounded by the oil guide plate, and gradually increase the flow rate, thereby improving the oil fume extraction effect of the range hood.

[0023] Furthermore, the oil guide plate includes a first oil guide portion, a second oil guide portion, a third oil guide portion, and a fourth oil guide portion. The first oil guide portion extends from front to back, the second oil guide portion extends downward from the rear end of the first oil guide portion, the third oil guide portion is located at the left end of the first and second oil guide portions, and the fourth oil guide portion is located at the right end of the first and second oil guide portions. The second oil guide portion cooperates with the fan system, and the oil guide portions enclose a cavity that is larger in front and smaller in the back. This cavity design of the oil guide plate, which is smaller inside and larger outside, concentrates high-frequency sounds within the cavity while protruding low-frequency sounds near the human ear. This makes the sound presented to the user deeper, improves the sound quality of the entire machine, and enhances the user experience.

[0024] Preferably, the structure forming the above-mentioned cavity is that the left end portion of the first oil guide portion gradually tilts to the right from front to back, the right end portion of the first oil guide portion gradually tilts to the left from front to back, the left end portion of the second oil guide portion gradually tilts to the right from top to bottom, the right end portion of the second oil guide portion gradually tilts to the left from top to bottom, the third oil guide portion gradually tilts to the right from front to back, and the fourth oil guide portion gradually tilts to the right from front to back.

[0025] Furthermore, the oil guide plate includes a first oil guide portion and a second oil guide portion, the first oil guide portion extends from front to rear, the second oil guide portion extends downward from the rear end portion of the first oil guide portion, and the second oil guide portion cooperates with the fan system;

[0026] The included angle of the first oil guide part and the second oil guide part is β, and β≥90° is satisfied. Thus, the manufacturing of the oil guide plate can be facilitated.

[0027] Compared with the prior art, the oil guide plate of the utility model has the advantages that: the top of the oil guide plate is V-shaped, so that the oil on the top of the oil guide plate drops from the lowest point of the V shape, thus preventing the oil on the top of the oil guide plate from falling to the cooking surface from the smoke inlet; when the whole machine is in a hanging state and is inclined forward, the oil will not be concentrated on the upper part of the smoke inlet due to the V shape, but will also drop from the lowest point of the V shape, thus the oil path problem of the range hood is solved well; the oil guide parts on the two sides of the oil guide plate extend towards each other, and the third and fourth oil guide parts have an inclination angle which is limited by the second oil guide part of the oil guide plate covering the air inlet of the fan system, thus the vortex area in the inner cavity surrounded by the oil guide plate is reduced, the air outside can flow more smoothly through the inner cavity surrounded by the oil guide plate into the fan system, and the flow rate is gradually increased, thus the oil smoke extraction effect of the range hood is improved. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 The figure is a closing state schematic view of the range hood of the utility model embodiment;

[0029] Figure 2 The figure is a closing state schematic view of the range hood hidden side plate of the utility model embodiment;

[0030] Figure 3 The figure is a closing state sectional view of the range hood of the utility model embodiment;

[0031] Figure 4 The figure is a schematic view of the oil guide plate of the range hood of the utility model embodiment (from front to back);

[0032] Figure 5 The figure is a schematic view of the oil guide plate of the range hood of the utility model embodiment (from back to front);

[0033] Figure 6 The figure is a cooperation schematic view of the moving mechanism and the oil guide plate of the range hood of the utility model embodiment;

[0034] Figure 7 The figure is an exploded structural schematic view of the oil guide plate, the moving mechanism and the fan system of the range hood of the utility model embodiment;

[0035] Figure 8 The figure is an opening state schematic view of the range hood of the utility model embodiment;

[0036] Figure 9 The figure is an opening state schematic view of the range hood hidden side plate of the utility model embodiment;

[0037] Figure 10 A schematic view of a flow field simulation of a prior art range hood. DETAILED DESCRIPTION

[0038] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions.

[0039] In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and since the embodiments disclosed in the present application can be arranged in different directions, these terms indicating the direction are only as an illustration and should not be regarded as a limitation, such as "upper", "lower" are not necessarily limited to the direction opposite or consistent with the direction of gravity. In addition, the features defined as "first", "second" can explicitly or implicitly include one or more of the features.

[0040] Referring to Figures 1 to 9 A range hood, which is a side suction type range hood, comprises a cabinet 1 and a fan system 2 arranged in the cabinet 1. The cabinet 1 is configured as a fume hood, which comprises a front plate 111, a rear plate 112, side plates 113 and a top plate 114, wherein the front plate 111 and the rear plate 112 are arranged in front of and behind each other, the front plate 111 is inclined relative to the rear plate 112, the side plates 113 have two, one of which is arranged between the left end of the front plate 111 and the rear plate 112, and the other is arranged between the right end of the front plate 111 and the rear plate 112, and the top plate 114 is arranged between the top of the above-mentioned front plate 111, rear plate 112 and side plates 113. The fan system 2 (not completely shown in the figure) is arranged in the space surrounded by the front plate 111, the rear plate 112, the side plates 113 and the top plate 114, and the fan system 2 has an air inlet 21, which is directed towards the front plate 111.

[0041] The front plate 111 is provided with an air inlet 12, which is formed on the upper portion of the front plate 111 and is close to the top of the front plate 111. The portion of the front plate 111 above the upper edge of the air inlet 12 is an upper panel 1111, which can extend vertically. The portion of the front plate 111 below the lower edge of the air inlet 12 is a lower panel 1112, which is inclined relative to the rear plate 112 and gradually inclines backward from top to bottom. In the normal installation state of the range hood, the rear plate 112 extends vertically. The upper edge of the air inlet 12 is higher than the upper edge of the air inlet 21 of the fan system 2.

[0042] The range hood further comprises a baffle 3 for opening and closing the air inlet 12 and a movement mechanism for driving the baffle 3. In the present embodiment, the movement mechanism comprises a push rod assembly 41, a push rod bracket 42, a rotating shaft assembly 43 and a lock pin 44. The push rod assembly 41 comprises a motor 411, a push rod 412 and a housing 413. The motor 411 is used to drive the push rod 412 to extend and retract relative to the housing 413. The motor 411 is mounted on the housing 413, and the housing 413 is mounted on the push rod bracket 42. The push rod 412 is partially exposed to the outside of the housing 413. The end of the push rod 412 exposed to the outside of the housing 413 is connected through the lock pin 44 and the rotating shaft assembly 43, and the rotating shaft assembly 43 is connected with the baffle 3.

[0043] The rotating shaft assembly 43 comprises a hinge 431 and a support 432. The support 432 is fixed in the cabinet 1. The hinge 431 has three ends. The first end is connected with the push rod 412 (i.e. the output end of the push rod assembly 41) through the lock pin 44. The second end is rotationally connected with the support 432. The third end is fixed to the side of the baffle 3 facing the inside of the cabinet 1. The portion of the hinge 431 between the first end and the second end is kept in the cabinet 1, and the third end is exposed to the outside of the cabinet 1. The specific installation method of the movement mechanism will be described in detail below.

[0044] The cabinet 1 is further provided with an oil guide plate 5. The oil guide plate 5 comprises a first oil guide portion 51, a second oil guide portion 52, a third oil guide portion 53 and a fourth oil guide portion 54. The first oil guide portion 51 extends from front to back. The second oil guide portion 52 extends downward and gradually backward from the rear end of the first oil guide portion 51. The third oil guide portion 53 is arranged at the left side end of the first oil guide portion 51 and the second oil guide portion 52. The fourth oil guide portion 54 is arranged at the right side end of the first oil guide portion 51 and the second oil guide portion 52. The second oil guide portion 52 is matched with the fan system 2, and the inclination angle thereof is consistent with that of the fan system 2. The second oil guide portion 52 is provided with a perforation 521 matched with the air inlet 21 of the fan system 2. The oil fume entering the cabinet 1 passes through the perforation 521 and enters the fan system 2. The fan system 2 is closely attached to the rear side of the oil guide plate 5.

[0045] The oil guiding portions enclose a cavity Q which is larger in front and smaller in back. Specifically, the left end of the first oil guiding portion 51 gradually inclines to the right from front to back, and the right end of the first oil guiding portion 51 gradually inclines to the left from front to back. The left end of the second oil guiding portion 52 gradually inclines to the right from top to bottom, and the right end of the second oil guiding portion 52 gradually inclines to the left from top to bottom. The front end of the third oil guiding portion 53 is connected to the front end of the side plate 13 on the left side of the cabinet 1, and the front end of the fourth oil guiding portion 54 is connected to the front end of the side plate 13 on the right side of the cabinet 1. The third oil guiding portion 53 and the fourth oil guiding portion 54 are substantially triangular. In addition, the third oil guiding portion 53 gradually inclines to the right from front to back, and the fourth oil guiding portion 54 gradually inclines to the right from front to back.

[0046] The inclination of the third oil guiding portion 53 and the fourth oil guiding portion 54 is limited so that the second oil guiding portion 52 can cover the air inlet 21 of the fan system 2, thereby reducing the vortex area in the inner cavity, especially the vortex at the wedge angle between the second oil guiding portion 52 and the lower panel 1112, making the airflow from the outside more smoothly pass through the cavity enclosed by the oil guiding plate 5 into the fan system 2, and gradually increasing the inner cavity cross-sectional flow rate, improving the oil fume extraction effect of the range hood. At the same time, the oil guiding plate 5 encloses an inner cavity which is small in the inner and large in the outer (the larger the closer to the front), which makes the high-frequency sound concentrated inside the cavity Q, and the low-frequency sound prominent near the human ear, making the sound exhibited to the user more deep, improving the sound quality of the whole machine, and increasing the user experience.

[0047] In order to facilitate processing, the included angle of the first oil guiding portion 51 and the second oil guiding portion 52 is β, and satisfies β≥90°, and the larger the better. In this embodiment, the included angle is the angle formed between the second folding edge 512 (to be described below) of the first oil guiding portion 51 and the second oil guiding portion 52.

[0048] The oil guiding plate 5 further comprises a mounting structure, which in this embodiment comprises a first mounting portion 55 and a second mounting portion 56. The first mounting portion 55 extends forward from the front end of the first oil guiding portion 51, and the second mounting portion 56 extends upward from the front end of the first mounting portion 55. The entire oil guiding plate 5 can be an integrally formed structure. The first mounting portion 55 is substantially horizontal, thereby providing a mounting for functional modules such as lighting devices, sensors, cameras, etc., and the second mounting portion 56 can be fixed with the upper panel 1111 above the smoke inlet 12, and the second mounting portion 56 is fixed to the back side of the upper panel 1111 facing the inside of the cabinet 1.

[0049] The oil guide plate 5 also includes clearance holes 57 formed in the first mounting portion 55 and the second mounting portion 56. The support 432 for the aforementioned motion mechanism is fixed to the upper surface of the first mounting portion 55. The push rod bracket 42 is fixed to the third or fourth oil guide portion 53, 54, and is located on the outer side of the oil guide plate 5. The outer side here refers to the side facing the side panel 13 of the housing 1, not the wall surface of the space enclosed by the oil guide plate 5. Because the third or fourth oil guide portion 53, 54 is inclined toward each other, sufficient space exists between the third or fourth oil guide portion 53, 54 and the corresponding side panel 113 to accommodate the motion mechanism. In this embodiment, the push rod bracket 42 is located on the fourth oil guide portion 54.

[0050] The hinge 431 includes a first portion 4311 located above the first mounting portion 55 and a second portion 4312 extending downward from the first mounting portion 55 through the clearance hole 57. The first end and the second end of the hinge 431 are opposite ends of the first portion 4311. The second portion 4312 extends from the position between the two ends of the first portion 4311 in a direction away from the first portion 4311. Preferably, the cross section of the second portion 4312 (in the installed state, the cross section is Figure 3 The first mounting portion 55 (a plane parallel to the paper, i.e., the vertical plane extending forward and backward) is fan-shaped. When the smoke deflector 3 is in the open position, the center of the circle is located above the second portion 4312. As a result, the hinge 431 does not require a large clearance hole 57 during movement, allowing the push rod 412 to be hidden. The left-right length of the first mounting portion 55 is limited to accommodate the hinge 431. An upwardly extending flange 571 is formed around the clearance hole 57 of the first mounting portion 55 to increase strength and prevent the clearance hole 57 from tearing the oil guide plate 5 due to the force of the push rod.

[0051] To facilitate installation of the push rod bracket 42, the fourth oil guide portion 54 is formed with a triangular rib 58, which protrudes rearward. The contoured edges 581 of the triangular rib 58 are rounded to reduce local stress and facilitate molding. Screws 59 are installed on the oil guide plate 5 near the upper and lower contoured edges 581 of the triangular rib 58 to increase local rigidity.

[0052] Since the moving mechanism is arranged on the oil guide plate 5, the first oil guide part 51 of the oil guide plate 5 is in a V shape bent downward to enhance the strength of the first oil guide part 51 so that the oil guide plate 5 will not be deformed due to the push rod force. The first oil guide part 51 comprises a first bent edge 511 and a second bent edge 512 arranged in front and back, and the first bent edge 511 and the second bent edge 512 jointly form the V shape bent downward. Thus, in the hanging state, since the top of the oil guide plate 5 is in a V shape, the V-shaped first oil guide part 51 has a flow guiding effect, and the first bent edge 511 guides the airflow coming from the smoke inlet 12 to the air inlet 21 of the fan system 2, thereby improving the performance of the whole machine. Preferably, the extension line L of the lower surface of the first bent edge 511 reaches the highest point of the edge of the air inlet 21 of the fan system 2 (including the case where the fan system 2 is provided with an air inlet ring, at this time the highest point of the edge of the air inlet 21 is the highest point of the inner circumference of the air inlet ring for air supply). In addition, the longer the length of the first bent edge 511 in the front and back directions, the better the flow guiding effect.

[0053] The angle between the first bent edge 511 and the horizontal plane is α, and in the embodiment, preferably α = 5°, which ensures that the airflow can be guided to the air inlet 21 of the fan system 2. At the same time, considering that the maximum displacement position of the right side of the oil guide plate under the push rod force is on the upper part of the triangular pressing rib 58, the bent part of the first oil guide part 51 is preferably located above the triangular pressing rib 58, that is, the intersection position of the first bent edge 511 and the second bent edge 512 corresponds to the upper part of the triangular pressing rib 58, thereby making the best position of the strength of the oil guide plate 5 be the middle position of the first oil guide part 51 in the front and back directions.

[0054] Since the bent part of the first oil guide part 51 constitutes the lowest position of the whole first oil guide part 51, the oil stains on the first oil guide part 51 will drip down from the lowest position. Therefore, further, it is necessary to ensure that the lowest point of the first oil guide part 51 is within the outermost edge of the lower panel 1112, so that the oil on the top of the oil guide plate 5 drips from the lowest point of the V shape, thereby eliminating the situation that the oil on the top of the oil guide plate 5 falls from the smoke inlet 12 to the cooking bench; when the whole machine is in the hanging state and is inclined forward, due to the existence of the V shape, the oil will also not be concentrated on the upper part of the smoke inlet 12, but will still drip from the lowest point of the V shape, thereby well solving the oil path problem of the range hood.

[0055] Considering the oil dripping situation, preferably α ≥ 3°, and in the projection on the horizontal plane, the shortest distance between the bent part of the first oil guide part 51 and the upper edge of the lower panel 1112 (the upper edge of the lower panel 1112 towards the side of the box body 1) satisfies d ≥ 10 mm.

Claims

1. A range hood comprising: The box body (1) has a smoke inlet (12) formed on its front side; An oil guide plate (5) is arranged in the box body (1); as well as A fan system (2) is also arranged in the box (1) and located at the rear side of the oil guide plate (5); The oil guide plate (5) comprises a first oil guide portion (51) and a second oil guide portion (52), wherein the first oil guide portion (51) extends from front to rear, and the second oil guide portion (52) extends downward from the rear end portion of the first oil guide portion (51), and the second oil guide portion (52) cooperates with the fan system (2); and is characterized in that: The first oil guide portion (51) comprises a first folded edge (511) and a second folded edge (512) arranged front to back, and the first folded edge (511) and the second folded edge (512) together form a downwardly bent V-shape.

2. The range hood according to claim 1, characterized in that: The fan system (2) has an air inlet (21) facing the smoke inlet (12), and an extension line (L) of the lower surface of the first folded edge (511) reaches the highest point of the edge of the air inlet (21) of the fan system (2).

3. The range hood according to claim 1, wherein: The angle between the first folded edge (511) and the horizontal plane is α, and satisfies α≥3°.

4. The range hood according to claim 1, wherein: The range hood comprises a front panel (111), the smoke inlet (12) is provided on the front panel (111), the front panel (111) comprises a lower panel (1112) located below the lower edge of the smoke inlet (12), and the bending part of the first oil guide portion (51) is located within the outermost edge of the lower panel (1112).

5. The range hood according to claim 4, characterized in that: In the projection on the horizontal plane, the shortest distance between the bending point of the first oil guide portion (51) and the upper edge of the lower panel (1112) is d, and satisfies d≥10 mm.

6. The range hood according to claim 1, characterized in that: The fan system (2) has an air inlet (21) facing the smoke inlet (12), and the upper edge of the smoke inlet (12) is higher than the upper edge of the air inlet (21); The oil guide plate (5) includes a first oil guide portion (51), a second oil guide portion (52), a third oil guide portion (53) and a fourth oil guide portion (54). The first oil guide portion (51) extends from front to back, the second oil guide portion (52) extends downward from the rear end of the first oil guide portion (51), the third oil guide portion (53) is arranged at the left end of the first oil guide portion (51) and the second oil guide portion (52), and the fourth oil guide portion (54) is arranged at the right end of the first oil guide portion (51) and the second oil guide portion (52). The second oil guide portion (52) cooperates with the fan system (2), and the third oil guide portion (53) and the fourth oil guide portion (54) are inclined toward each other from front to back.

7. The range hood according to claim 1, characterized in that: The oil guide plate (5) includes a first oil guide portion (51), a second oil guide portion (52), a third oil guide portion (53) and a fourth oil guide portion (54). The first oil guide portion (51) extends from front to back, the second oil guide portion (52) extends downward from the rear end of the first oil guide portion (51), the third oil guide portion (53) is arranged at the left end of the first oil guide portion (51) and the second oil guide portion (52), and the fourth oil guide portion (54) is arranged at the right end of the first oil guide portion (51) and the second oil guide portion (52). The second oil guide portion (52) cooperates with the fan system (2), and each oil guide portion encloses a cavity (Q) that is larger at the front and smaller at the back.

8. The range hood according to claim 7, characterized in that: The left end portion of the first oil guide portion (51) gradually tilts to the right from front to back, the right end portion of the first oil guide portion (51) gradually tilts to the left from front to back, the left end portion of the second oil guide portion (52) gradually tilts to the right from top to bottom, the right end portion of the second oil guide portion (52) gradually tilts to the left from top to bottom, the third oil guide portion (53) gradually tilts to the right from front to back, and the fourth oil guide portion (54) gradually tilts to the right from front to back.

9. The range hood according to claim 1, characterized in that: The oil guide plate (5) comprises a first oil guide portion (51) and a second oil guide portion (52), wherein the first oil guide portion (51) extends from front to rear, and the second oil guide portion (52) extends downward from the rear end portion of the first oil guide portion (51), and the second oil guide portion (52) cooperates with the fan system (2); The included angle between the first oil guiding portion (51) and the second oil guiding portion (52) is β, and β≥90° is satisfied.

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