Range hood

Abstract

The utility model provides an improved range hood. The range hood comprises a machine shell (4) and a centrifugal fan (3) arranged in the machine shell (4), the centrifugal fan (3) comprises a first airflow inlet (1) and a first wall body (5), and an opening of the first wall body (5) faces the machine shell (4); a first airflow channel (7) is formed between the first airflow inlet (1) and the first wall body (5) at an interval; a first oil filtering plate (11) is arranged in the first airflow channel (7) and is arranged to be suitable for guiding lampblack airflow escaping upwards along the first airflow channel (7) to the first airflow inlet (1). Therefore, the oil smoke exhausting efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of range hood. BACKGROUND

[0002] In Asian regions, due to the traditional cooking habit of stir-frying, the oil content in the smoke generated during cooking is particularly high. Therefore, the range hood for extracting and exhausting the oil smoke generated during cooking has become an important household appliance indispensable to daily life. With the continuous improvement of people's requirements for life quality, the range hood is also continuously upgraded and improved. For example, the existing range hood oil smoke extraction efficiency needs to be improved. In addition, reducing oil smoke escape is also a technical problem to be solved in the field.

[0003] Furthermore, the existing range hood scheme using a cyclone filter has been proposed, such as US4872892. The existing scheme focuses on the cyclone filter itself, which is relatively limited. It can be said that the existing range hood scheme using a cyclone filter is relatively single. Moreover, the existing range hood using a cyclone filter is mainly a side suction type range hood, which limits the application space of the cyclone filter in the range hood field to some extent.

[0004] Unless sufficient evidence is provided, the prior art described herein does not mean that these prior art is admitted to be known to those skilled in the art related to the present application before the filing date of the present application. SUMMARY

[0005] One purpose of the embodiments of the present application is to propose an improved range hood aiming at at least one of the above technical problems and / or other possible technical problems not mentioned in the present application.

[0006] One embodiment of the present application relates to a range hood, comprising a housing and a centrifugal fan arranged in the housing, the centrifugal fan comprising a first air inlet, the opening of which is directed towards a first wall of the housing; a first air flow channel is formed between the first air inlet and the first wall; a first oil filter plate is arranged in the first air flow channel and is configured to guide the oil smoke flow escaping upward along the first air flow channel to the first air inlet.

[0007] The first oil filter plate is arranged in the first air flow channel, so that the oil smoke flow escaping upward along the first air flow channel is guided by the first oil filter plate to the first air inlet, thereby improving the oil smoke extraction efficiency.

[0008] In one or some embodiments, the first oil filter plate is configured to guide the oil smoke flow escaping upward along the first air flow channel to the lower half of the first air inlet; and / or

[0009] The first air inlet is circular, and the free end of the first oil filter plate is not higher than the center of the first air inlet; and / or

[0010] The first driving unit is arranged to drive the first oil filter plate to move and switch positions; and / or

[0011] The first oil filter plate is fixed to the first wall body, and the free end of the first oil filter plate extends downward from the first wall body toward the first air inlet; and / or

[0012] The first oil filter plate is fixed to the first wall body, and the free end of the first oil filter plate extends upward from the first wall body toward the first air inlet; and / or

[0013] The first oil filter plate is fixed to the first wall body, and the free end of the first oil filter plate extends horizontally from the first wall body toward the first air inlet; and / or

[0014] The first wall body is a front side wall of the casing; and / or

[0015] The first wall body is vertically arranged; and / or

[0016] The first oil filter plate comprises a V-shaped flow guide plate body with an open downward, and the free end of the V-shaped flow guide plate body extends downward toward the first air inlet; and / or

[0017] The first oil filter plate comprises a V-shaped flow guide plate body with an open downward, and the free end of the V-shaped flow guide plate body extends downward toward the first air inlet.

[0018] The first oil filter plate is arranged to guide the oil fume flow escaping upward along the first air flow channel to the lower half of the first air inlet; the first oil filter plate is arranged so that the oil fume flow is gathered and concentrated to flow into the lower half of the first air inlet, thereby improving the oil fume extraction efficiency.

[0019] The first air inlet is circular, and the free end of the first oil filter plate is not higher than the center of the first air inlet; thereby, the oil fume flow is gathered and concentrated to flow into the lower half of the first air inlet, thereby improving the oil fume extraction efficiency.

[0020] The first driving unit is arranged to drive the first oil filter plate to move and switch positions; thereby, the position of the first oil filter plate can be adjusted based on the actual needs of the user, and the oil fume extraction efficiency is improved.

[0021] The first oil filter plate comprises a V-shaped flow guide plate body with an open downward, the free end of the V-shaped flow guide plate body extends obliquely downward to the first air inlet; the V-shaped flow guide plate body with an open downward is suitable for gathering smoke and guiding the oil fume to the first air inlet, improving the oil fume extraction efficiency.

[0022] The first oil filter plate comprises a V-shaped flow guide plate body with an open downward, the free end of the V-shaped flow guide plate body extends obliquely downward to the first air inlet; the V-shaped flow guide plate body with an open downward is suitable for gathering smoke and guiding the oil fume to the first air inlet, improving the oil fume extraction efficiency.

[0023] In one or some embodiments, the centrifugal fan comprises a second air inlet, the second air inlet is arranged opposite to the first air inlet; the second air inlet is open to the second wall body of the casing; a second air flow channel is formed between the second air inlet and the second wall body; a second oil filter plate is arranged in the second air flow channel and is arranged to be suitable for guiding the oil fume flow escaping upward along the second air flow channel to the lower half of the second air inlet.

[0024] The second oil filter plate is arranged in the second air flow channel, so that the oil fume flow escaping upward along the second air flow channel is guided by the second oil filter plate to the second air inlet, improving the oil fume extraction efficiency.

[0025] In one or some embodiments, the second oil filter plate is arranged to be suitable for guiding the oil fume flow escaping upward along the second air flow channel to the lower half of the second air inlet; and / or

[0026] The second air inlet is circular, the free end of the second oil filter plate is not higher than the center of the second air inlet; and / or

[0027] A second driving unit is arranged to drive the second oil filter plate to move and switch positions; and / or

[0028] The second oil filter plate is fixed to the second wall body, the free end of the second oil filter plate extends obliquely downward from the second wall body to the second air inlet; and / or

[0029] The second oil filter plate is fixed to the second wall body, the free end of the second oil filter plate extends obliquely upward from the second wall body to the second air inlet; and / or

[0030] The second oil filter plate is fixed to the second wall body, the free end of the second oil filter plate extends horizontally from the second wall body to the second air inlet; and / or

[0031] The second wall body is the rear wall of the casing; and / or

[0032] The second wall body is vertically arranged; and / or

[0033] The second oil filter plate comprises a V-shaped flow guide plate body with an open downward, and a free end of the V-shaped flow guide plate body extends obliquely downward to the second air inlet; and / or

[0034] The second oil filter plate comprises a V-shaped flow guide plate body with an open downward, and a free end of the V-shaped flow guide plate body extends obliquely downward to the second air inlet.

[0035] The second oil filter plate is arranged to guide the oil fume flow escaping upward along the second air flow channel to the lower half of the second air inlet; the arrangement of the second oil filter plate causes the oil fume flow to gather and concentrate into the lower half of the second air inlet, thereby improving the oil fume extraction efficiency.

[0036] The second air inlet is circular, and the free end of the second oil filter plate is not higher than the center of the second air inlet; thereby causing the oil fume flow to gather and concentrate into the lower half of the second air inlet, thereby improving the oil fume extraction efficiency.

[0037] The second driving unit is arranged to drive the second oil filter plate to move and switch positions; thereby facilitating the adjustment of the position of the second oil filter plate based on the actual needs of the user, and improving the oil fume extraction efficiency.

[0038] The second oil filter plate comprises a V-shaped flow guide plate body with an open downward, and a free end of the V-shaped flow guide plate body extends obliquely downward to the second air inlet; the V-shaped flow guide plate body with an open downward is suitable for gathering smoke and guiding oil fume to the second air inlet, thereby improving the oil fume extraction efficiency.

[0039] The second oil filter plate comprises a V-shaped flow guide plate body with an open downward, and a free end of the V-shaped flow guide plate body extends obliquely downward to the second air inlet; the V-shaped flow guide plate body with an open downward is suitable for gathering smoke and guiding oil fume to the second air inlet, thereby improving the oil fume extraction efficiency.

[0040] In one or some embodiments, a cyclone filter device is included, which is arranged with a plurality of side-by-side arranged cyclone pipes; the centrifugal fan and the cyclone filter device are sequentially arranged from top to bottom in the cabinet; one end of the cyclone pipe is provided with a first exhaust port arranged to be suitable for conveying air flow to the first air flow channel. The ingenious cooperation of the centrifugal fan, the cyclone filter device, and the first oil filter plate arranged in the first air flow channel helps to improve the oil fume extraction efficiency.

[0041] In one or some embodiments, the first exhaust port is located directly below the first air flow channel; and / or

[0042] The first exhaust port is located directly below the first oil filter plate; and / or

[0043] The first exhaust port is an open upwardly inclined cut; and / or

[0044] The cyclone filter device is obliquely arranged in the casing, one end of the cyclone duct provided with the first exhaust port is upwardly tilted, and the first exhaust port extends upwardly and obliquely towards the first wall body.

[0045] The first exhaust port is located directly below the first airflow passage; thus, the cyclone filter device and the first oil filter plate arranged in the first airflow passage are ingeniously matched, which helps to improve the oil fume extraction efficiency.

[0046] The first exhaust port is located directly below the first oil filter plate; thus, the cyclone filter device and the first oil filter plate arranged in the first airflow passage are ingeniously matched, which helps to improve the oil fume extraction efficiency.

[0047] The first exhaust port is an open upwardly inclined cut; thus, it helps to improve the oil fume extraction efficiency.

[0048] The cyclone filter device is obliquely arranged in the casing, one end of the cyclone duct provided with the first exhaust port is upwardly tilted, and the first exhaust port extends upwardly and obliquely towards the first wall body; thus, the cyclone filter device and the first oil filter plate arranged in the first airflow passage are ingeniously matched, which helps to improve the oil fume extraction efficiency. In one or some embodiments, the bottom of the casing is provided with an open downward air inlet; a smoke guide plate is included, which protrudes from the front side of the casing to form an eave portion; an airflow driving device is included, which is arranged at the free end of the smoke guide plate; the airflow driving device is arranged to be adapted to deliver an induced airflow to the cyclone filter device. The centrifugal fan, the cyclone filter device, the airflow driving device, and the first oil filter plate arranged in the first airflow passage are ingeniously matched, which helps to improve the oil fume extraction efficiency.

[0049] In one or some embodiments, the smoke guide plate is arranged to be adapted to switch between a first position and a second position; a wind inlet is arranged on the wall of the cyclone duct, and the wind inlet is open towards the air inlet below; when the smoke guide plate is in the first position, the smoke guide plate is completely or partially embedded in the casing, the smoke guide plate completely or partially closes the air inlet, and the cyclone filter device is located above the smoke guide plate; when the smoke guide plate is in the second position, the smoke guide plate is completely or partially moved out of the casing to form the eave part; when the smoke guide plate is in the second position, the airflow driving device is arranged to be adapted to deliver the induced airflow to the wind inlet of the cyclone filter device. The centrifugal fan, the cyclone filter device, the airflow driving device, and the first oil filter plate arranged in the first airflow channel are ingeniously matched to help improve the oil fume extraction efficiency. When the smoke guide plate is in the first position, the smoke guide plate is completely or partially embedded in the casing; thus, when the smoke guide plate is in the first position, the smoke guide plate is at least partially hidden, ensuring the oil fume extraction function while reducing the space occupation of the range hood.

[0050] In one or some embodiments, when the smoke guide plate is in the first position, the casing and the smoke guide plate are both in the shape of a cuboid; and / or

[0051] The air inlet is located at the bottom end of the range hood; and / or

[0052] The bottom edge of the casing is the bottom end of the range hood; and / or

[0053] The first wall body is the front side wall of the casing; and / or

[0054] The airflow outlet of the airflow driving device is towards the air inlet on the rear side.

[0055] When the smoke guide plate is in the first position, the casing and the smoke guide plate are both in the shape of a cuboid; thus, when the smoke guide plate is in the first position, the smoke guide plate is hidden, ensuring the oil fume extraction function while reducing the space occupation of the range hood.

[0056] In one or some embodiments, the bottom edge of the casing is the bottom end of the range hood; and / or

[0057] The first wall body is the front side wall of the casing.

[0058] When the smoke guide plate is in the first position, the casing and the smoke guide plate are both in the shape of a cuboid, thus making the range hood convenient to be embedded and installed in the cabinet, and improving the integrated effect of the range hood and the cabinet.

[0059] It should be noted that the "front side", "inclined downward", "inclined upward", "directly below", "the bottom end" and other directional expressions appearing in the present application are based on the normal use state of the range hood, unless otherwise specified.

[0060] It should be noted that the "first", "second" appearing in the specification are for the purpose of description only, and do not indicate relative importance; moreover, they are not a limitation on the number of features defined thereby; in addition, they are not a limitation on the logical relationship or order relationship of the features defined thereby.

[0061] The above summary of the application is not intended to describe all possible embodiments of the present application. Throughout the application, guidance is provided by listing examples, which can be used in various possible combinations. BRIEF DESCRIPTION OF DRAWINGS

[0062] The following drawings are merely illustrative and explanatory of the present application, and do not limit the scope of the present application, wherein:

[0063] Figure 1 is a structural schematic diagram of an embodiment of a range hood of the present application;

[0064] Figure 2 is a state diagram of the range hood embodiment shown in Figure 1

[0065] Figure 3 is a sectional view of the range hood embodiment shown in Figure 2

[0066] Figure 4 is another sectional view of the range hood embodiment shown in Figure 2

[0067] Figure 5 is a structural schematic diagram of a first oil filter plate of an embodiment of a range hood of the present application;

[0068] Figure 6 is a structural schematic diagram of a cyclone filter device of an embodiment of a range hood of the present application;

[0069] Figure 7 is a sectional view of another embodiment of a range hood of the present application;

[0070] Figure 8 is a sectional view of another embodiment of a range hood of the present application;

[0071] Figure 9 is a structural schematic diagram of a first oil filter plate of another embodiment of a range hood of the present application;

[0072] Figure 10 ​​​is a sectional view of another embodiment of the range hood of the present application;

[0073] Figure 11 is a sectional view of another embodiment of the range hood of the present application.

[0074] Reference signs:

[0075] 1 - first air inlet, 2 - second air inlet, 3 - centrifugal fan, 4 - casing, 5 - first wall, 6 - second wall, 7 - first air passage, 8 - second air passage, 9 - smoke deflector, 10 - slide rail, 11 - first oil filter plate, 12 - second oil filter plate, 13 - fixed plate, 14 - deflector plate, 15 - air flow driving device, 16 - cyclone filter device, 17 - first air outlet, 18 - duct seat, 19 - electrical box, 20 - oil cup.

DETAILED DESCRIPTION

[0076] In order to make the purpose, scheme and beneficial effects of the present application more clear and obvious, the present application is further described below in combination with the drawings and preferred embodiments.

[0077] An embodiment of the range hood of the present application includes a centrifugal fan 3, a casing 4, a smoke deflector 9, a driving module, an air flow driving device 15, a cyclone filter device 16, a first air outlet 17, a duct seat 18, an electrical box 19 and an oil cup 20, as shown in Figures 1 to 4 The centrifugal fan 3 is arranged in the casing 4. The duct seat 18 and the electrical box 19 are both arranged on the top wall of the casing 4. The range hood is a top suction type range hood.

[0078] The centrifugal fan 3 includes a first air inlet 1, which is open towards a first wall 5 of the casing 4, as shown in Figure 3 and 4 The first wall 5 is a front side wall of the casing 4. In other words, the first air inlet 1 is open horizontally forward. The first wall 5 is arranged vertically. A first air passage 7 is formed between the first air inlet 1 and the first wall 5. A first oil filter plate 11 is arranged in the first air passage 7, which is arranged to deflect the oil smoke flow escaping upward along the first air passage 7 to the first air inlet 1.

[0079] The first oil filter plate 11 includes a V-shaped deflector plate body, which is open downward, as shown in Figure 3 and 4The free end of the V-shaped deflector body extends downwardly and obliquely towards the first air inlet 1. The first oil filter plate 11 comprises a fixed plate 13 and a deflector plate 14. The fixed plate 13 and the deflector plate 14 are integrally formed. Specifically, the fixed plate 13 and the deflector plate 14 are integrally formed from a metal plate. The fixed plate 13 is fixed to the first wall body 5; preferably, the fixed plate 13 is fixed to the first wall body 5 by screws or rivets. The deflector plate 14 is disposed in the first air passage 7 for deflecting the oil fume flow escaping upwardly along the first air passage 7 to the first air inlet 1, as shown in Figure 3 and 4 as shown in

[0080] The first air inlet 1 is circular, and the free end of the first oil filter plate 11 is at the same height as the center of the first air inlet 1. The first oil filter plate 11 is arranged to be adapted to deflect the oil fume flow escaping upwardly along the first air passage 7 to the lower half of the first air inlet 1. In the present embodiment, the "lower half of the first air inlet 1" refers to the portion of the first air inlet 1 below the horizontal plane passing through the center of the first air inlet 1.

[0081] The cyclone filter device 16 is arranged with a plurality of cyclone ducts arranged side by side. The centrifugal fan 3 and the cyclone filter device 16 are arranged in the machine housing 4 in sequence from top to bottom. One end of the cyclone duct is provided with a first air outlet 17 arranged to be adapted to deliver air flow to the first air passage 7.

[0082] The first air outlet 17 is located directly below the first air passage 7, as shown in Figure 3 and 4 Specifically, the first air outlet 17 is located directly below the first oil filter plate 11. The first air outlet 17 is an open oblique upwardly inclined cut. The cyclone filter device 16 is obliquely arranged in the machine housing 4, and the end of the cyclone duct provided with the first air outlet 17 is tilted upwardly, and the first air outlet 17 extends obliquely upwardly towards the first wall body 5.

[0083] The bottom of the machine housing 4 is provided with an air inlet opening downwardly. The cyclone duct is provided with an air inlet opening facing the air inlet below. The smoke deflector 9 protrudes from the front side of the machine housing 4 to form an eave. The air flow driving device 15 is arranged at the free end of the smoke deflector 9. The air flow driving device 15 is arranged to be adapted to deliver an induced air flow to the cyclone filter device 16. Specifically, the smoke deflector 9 is arranged to be adapted to be switched between a first position and a second position. The air flow driving device 15 moves with the smoke deflector 9. In other words, the smoke deflector 9 is movable. Specifically, the smoke deflector 9 moves under the drive of the drive module. The air inlet is located at the bottom end of the range hood. The bottom edge of the machine housing 4 is the bottom end of the range hood. The air outlet of the air flow driving device 15 faces the air inlet on the rear side thereof.

[0084] The smoke guide plate 9 moves in a horizontal direction when switching between the first position and the second position. The smoke guide plate 9 moves forward in the horizontal direction when switching from the first position to the second position. The smoke guide plate 9 moves backward in the horizontal direction when switching from the second position to the first position.

[0085] A driving module is arranged to drive the smoke guide plate 9 to switch between the first position and the second position. Specifically, the driving module is arranged to drive the smoke guide plate 9 to move linearly to switch between the first position and the second position. The driving module includes a motor, a first gear, a second gear, and a rack. The rack is arranged on the top wall of the smoke guide plate 9. The motor is arranged to drive the first gear to rotate. The rotating first gear drives the rack to move, and the smoke guide plate 9 moves together with the rack. Specifically, the second gear is arranged between the first gear and the rack. The second gear is engaged with both the first gear and the rack. The rotating first gear drives the second gear to rotate, and the rotating second gear drives the rack to move. The diameter of the second gear is larger than that of the first gear.

[0086] The smoke guide plate 9 includes a glass top plate, and the rack is integrally formed on the glass top plate. Specifically, the rack can be processed by rolling during the forming process of the glass top plate; the rack can also be processed by rolling after the glass top plate is heated and softened; or the rack can be directly formed on the glass top plate by numerical control technology.

[0087] When the smoke guide plate 9 is in the first position, the smoke guide plate 9 is completely or partially embedded in the machine shell 4, the smoke guide plate 9 completely or partially closes the air inlet, and the cyclone filter device 16 is located above the smoke guide plate 9.

[0088] When the smoke guide plate 9 is in the first position, the machine shell 4 and the smoke guide plate 9 are in the shape of a cuboid as a whole. When the smoke guide plate 9 is in the first position, the smoke guide plate 9 is completely embedded in the machine shell 4, and the smoke guide plate 9 partially closes the air inlet, as shown in FIG. 4. Figure 1 When the smoke guide plate 9 is in the first position, the smoke guide plate 9 partially closes the air inlet, and the air inlet is still open, but it is smaller than when the smoke guide plate 9 is in the second position. When the smoke guide plate 9 is in the first position, if the centrifugal fan 3 is running, the extractor hood can still extract and discharge smoke through the air inlet, but it is preferably applied to the case where the oil smoke generated by the stove is small.

[0089] When the smoke guide plate 9 is in the second position, the smoke guide plate 9 is completely or partially moved forward out of the machine shell 4 to form an eave part, and the air inlet is completely open. When the smoke guide plate 9 is in the second position, the airflow driving device 15 is arranged to transport the induced airflow to the air inlet of the cyclone filter device 16. When the smoke guide plate 9 is in the second position, the machine shell 4 and the smoke guide plate 9 are in the shape of “L” as a whole.

[0090] The airflow driving device 15 is in the shape of a cuboid. The airflow driving device 15 is a cross-flow fan. The cross-flow fan includes a casing 4 in the shape of a cuboid and a cross-flow impeller arranged in the casing 4. The airflow driving device 15 is arranged at the free end of the smoke guide plate 9, as shown in Figure 3 and 4 When the smoke guide plate 9 is in the second position, the free end of the smoke guide plate 9 is at the frontmost side of the range hood. The airflow inlet of the airflow driving device 15 is arranged with an opening facing downward, and the airflow inlet is generally directed toward the cooking area below. Thus, when the cross-flow fan is running, part of the escaping oil fume flow is sucked into the airflow inlet and flows into the air inlet along the jet flow, thereby improving the oil fume extraction effect.

[0091] The airflow driving device 15 includes a vertically downward extending rear wall, and the airflow outlet of the airflow driving device 15 is arranged at the vertically downward extending rear wall. The airflow outlet of the airflow driving device 15 is directed toward the air inlet located at the rear side thereof.

[0092] The airflow driving device 15 is arranged below the smoke guide plate 9 and abuts against the bottom wall of the smoke guide plate 9, and the airflow output by the airflow outlet of the airflow driving device 15 flows along the bottom wall of the smoke guide plate 9 toward the air inlet. Since the airflow outlet of the airflow driving device 15 is directed toward the air inlet located at the rear side thereof and the airflow outlet of the airflow driving device 15 abuts against the bottom wall of the smoke guide plate 9, when the cross-flow fan is running, the generated jet flow flows along the bottom wall of the smoke guide plate 9 under the action of the Coanda effect and then flows into the air inlet. It should be noted that the Coanda effect is also known as the wall attachment effect or the Coanda effect.

[0093] In the case of a large amount of oil fume generated by the range hood, the smoke guide plate 9 is controlled to switch to the second position, the centrifugal fan 3 is turned on to run, and the cross-flow fan is also turned on to run. The centrifugal fan 3 running causes a negative pressure at the air inlet, and the jet flow generated by the cross-flow fan flows toward the air inlet under the action of the Coanda effect. Thus, the oil fume escape is reduced, and the oil fume extraction effect is improved.

[0094] In the case of a medium amount of oil fume generated by the range hood, the smoke guide plate 9 is controlled to switch to the second position, and the centrifugal fan 3 is turned on, but the cross-flow fan is not turned on.

[0095] The left and right sides of the smoke guide plate 9 are each provided with a slide rail 10, and the airflow driving device 15 is arranged in connection between the slide rails 10 on the left and right sides. The slide rails 10 on the left and right sides and the airflow driving device 15 together enclose a U-shaped protrusion arranged with an opening on the bottom wall of the smoke guide plate 9 and directed toward the air inlet, as shown in Figure 2As shown, the U-shaped convex edge cooperates with the bottom wall of the smoke guide plate 9 to form a smoke collection cavity. It should be noted that the "U-shaped convex edge with the opening facing the air inlet" means that the opening of the "U-shaped" of the U-shaped convex edge faces the air inlet. Specifically, the sliding rail 10 is arranged between the smoke guide plate 9 and the cabinet 4. The sliding rail 10 includes a guide rail and a movable rail. The guide rail is arranged in the cabinet 4, and the guide rail is embedded with a sliding block adapted to slide along the guide rail. The movable rail is in the shape of an "arch", and the movable rail includes an arch back opening and an arch opening arranged opposite to each other. The guide rail is embedded in the arch back opening, and the sliding block is fixed to the movable rail. The end of the airflow driving device 15 is embedded in the arch opening. The smoke guide plate 9 is arranged on the movable rail and the airflow driving device 15.

[0096] The outer wall of the airflow driving device 15 extends vertically downward. The control switch is arranged on the outer wall of the airflow driving device 15, as shown in Figure 1 and 2 .

[0097] When the smoke guide plate 9 is in the first position, the airflow driving device 15 extends from one end of the cabinet 4 to the other end. Specifically, when the smoke guide plate 9 is in the first position, the airflow driving device 15 extends from the left side wall of the cabinet 4 to the right side wall of the cabinet 4, as shown in Figure 1 . When the smoke guide plate 9 is in the first position, the outer wall of the airflow driving device 15 abuts against the front side wall of the cabinet 4, and the outer wall of the airflow driving device 15 also abuts against the left side wall of the cabinet 4 and the right side wall of the cabinet 4. The airflow driving device 15 is located at the bottom end of the extractor hood.

[0098] The centrifugal fan 3 and the cyclone filter device 16 are arranged in the cabinet 4 in sequence from top to bottom, as shown in Figure 3 and 4 . When the smoke guide plate 9 is in the first position, the cyclone filter device 16 is located above the smoke guide plate 9. When the smoke guide plate 9 is in the second position, the airflow driving device 15 is arranged to be adapted to deliver the induced airflow to the cyclone filter device 16, as shown in Figure 2 , 3 and 4. The airflow driving device 15 and the cyclone filter device 16 are ingeniously matched to improve the air inlet effect.

[0099] The cyclone filter device 16 is arranged obliquely in the cabinet 4. The inclination angle of the cyclone filter device 16 is an acute angle, and preferably, the inclination angle of the cyclone filter device 16 is equal to 15°, as shown in Figure 3 and 4 . The cyclone filter device 16 includes a plurality of cyclone pipes arranged side by side. Each cyclone pipe is substantially in the shape of a cylinder. Preferably, the cyclone filter device 16 adopts an integral molding structure. For example, the cyclone filter device 16 is integrally molded by a plastic material.

[0100] The first air outlet 17 is arranged at the end of the cyclone duct which is upwardly curved, as shown in Figure 3 and 4 . The air inlet is arranged on the wall of the cyclone duct, and the air inlet is open towards the air inlet below. The air inlet is in the shape of a strip, and is arranged along the extension direction of the wall of the corresponding cyclone duct. The air inlets of the cyclone ducts are parallel to each other, and the air inlets of the cyclone ducts extend along the inclination direction of the cyclone filter device 16. It should be noted that the first air outlet 17 is arranged at one end of the cyclone duct, and the other end of the cyclone duct can be substantially closed with only an oil leakage hole, or can be provided with a second air outlet. The other end of the cyclone duct is arranged above the oil cup 20. The oil cup 20 is used to collect oil dripping from the other end of the cyclone duct. The oil cup 20 is in the shape of a strip, and is fixed to the rear side wall of the casing 4, as shown in Figure 3 and 4 . The oil cup 20 is blocked in the horizontal direction by the air flow driving device 15 in front of it, as shown in Figure 3 .

[0101] The first air outlet 17 is directed towards the front side wall of the casing 4, as shown in Figure 3 and 4 . The first air outlet 17 is an oblique cutout open towards the front side wall of the casing 4. It should be noted that the "oblique cutout" is only a figurative expression; specifically, the formation of the "oblique cutout" can be in various forms, and does not necessarily have to be formed by a cutting process.

[0102] The cyclone filter device 16 includes an integral extension surface, and the air inlets are integrally formed on the integral extension surface. The integral extension surface is the bottom outer surface of the cyclone filter device 16. Specifically, the integral extension surface is an integral plane, and the air inlets are integrally formed on the integral plane. The inclination angle of the integral plane is an acute angle, and preferably the inclination angle of the integral plane is equal to 15°, as shown in Figure 3 and 4 .

[0103] The front end of the integral plane is integrally formed with a first flange, and the first flange is abutted to the front side wall of the casing 4, and the first flange and the front side wall of the casing 4 are fixed together by screws, as shown in Figure 3 and 4 . The rear end of the integral plane is integrally formed with a second flange, and the second flange is abutted to the rear side wall of the casing 4, and the second flange and the rear side wall of the casing 4 are fixed together by screws, as shown in Figure 3 and 4 .

[0104] The first air inlet 1 of the centrifugal fan 3 and the front side wall of the casing 4 form a first air flow channel 7, and the first air outlet 17 is directed towards the first air flow channel 7, as shown in Figure 3 and4 As shown. It should be noted that the centrifugal fan 3 is a single-sided air intake. The first airflow inlet 1 of the centrifugal fan 3 faces the front wall of the casing 4, and the first airflow inlet 1 of the centrifugal fan 3 is the only or main airflow inlet of the centrifugal fan 3; in other words, the other side of the centrifugal fan 3 opposite to the first airflow inlet 1 is not provided with an airflow inlet or is only provided with an auxiliary airflow inlet.

[0105] Another embodiment of the range hood proposed in this application includes a centrifugal fan 3 comprising a second airflow inlet 2, which is disposed opposite to the first airflow inlet 1. Figure 10 and 11 As shown. The second airflow inlet 2 opens towards the second wall 6 of the housing 4. The second wall 6 is the rear side wall of the housing 4. In other words, the second airflow inlet 2 opens horizontally towards the rear. The second wall 6 is vertically arranged. A second airflow channel 8 is formed between the second airflow inlet 2 and the second wall 6. A second oil filter plate 12 is arranged in the second airflow channel 8, which is configured to guide the oil fume airflow escaping upward along the second airflow channel 8 to the second airflow inlet 2.

[0106] like Figure 10 and 11 As shown, the first oil filter plate 11 is fixed to the first wall 5, and the free end of the first oil filter plate 11 extends obliquely upward from the first wall 5 toward the first airflow inlet 1. The second oil filter plate 12 is fixed to the second wall 6, and the free end of the second oil filter plate 12 extends obliquely upward from the second wall 6 toward the second airflow inlet 2.

[0107] The second airflow inlet 2 is circular, and the free end of the second oil filter plate 12 is at the same height as the center of the second airflow inlet 2. The second oil filter plate 12 is configured to guide the oil fume airflow escaping upward along the second airflow channel 8 to the lower half of the second airflow inlet 2.

[0108] Optionally, a first drive unit is included, configured to move the first oil filter plate 11 to switch positions. This can be achieved by the first drive unit being configured to move the first oil filter plate 11 vertically or vertically to switch positions, or by the first drive unit being configured to move the first oil filter plate 11 by rotating it to switch positions.

[0109] Optionally, a second drive unit is included, configured to move the second oil filter plate 12 to switch positions. This could be a second drive unit configured to move the second oil filter plate 12 vertically to switch positions, or a second drive unit configured to move the second oil filter plate 12 by rotation to switch positions.

[0110] The air flow inlet of the centrifugal fan 3 is spaced apart from the front side wall of the casing 4 to form an air flow channel, and the first air outlet 17 is directed toward the air flow channel, as shown in Figs. Figure 4 , 7 It should be noted that the centrifugal fan 3 can be either single-sided air inlet or double-sided air inlet. If the centrifugal fan 3 is double-sided air inlet, the "air flow inlet of the centrifugal fan 3" refers to the main air flow inlet of the centrifugal fan 3, which is not provided with a motor fixing support. The centrifugal fan 3 shown in Figs. Figure 4 , 7 8 and 9 is double-sided air inlet. The "air flow channel" is formed between the main air flow inlet of the centrifugal fan 3 and the front side wall of the casing 4.

[0111] Optionally, the first oil filter plate 11 is fixed to the first wall body 5, and the free end of the first oil filter plate 11 extends downwardly and obliquely from the first wall body 5 toward the first air flow inlet 1.

[0112] Optionally, the first oil filter plate 11 is fixed to the first wall body 5, and the free end of the first oil filter plate 11 extends horizontally from the first wall body 5 toward the first air flow inlet 1.

[0113] Optionally, the first oil filter plate 11 comprises an open downwardly tilted ^-shaped flow guide plate body, and the free end of the ^-shaped flow guide plate body extends downwardly and obliquely toward the first air flow inlet 1.

[0114] Optionally, the second oil filter plate 12 is fixed to the second wall body 6, and the free end of the second oil filter plate 12 extends downwardly and obliquely from the second wall body 6 toward the second air flow inlet 2.

[0115] Optionally, the second oil filter plate 12 is fixed to the second wall body 6, and the free end of the second oil filter plate 12 extends horizontally from the second wall body 6 toward the second air flow inlet 2.

[0116] Optionally, the second oil filter plate 12 comprises an open downwardly tilted ^-shaped flow guide plate body, and the free end of the ^-shaped flow guide plate body extends downwardly and obliquely toward the second air flow inlet 2.

[0117] Optionally, when the range hood is embeddedly installed in the cabinet, only the outer wall of the air flow driving device 15 is visible in the horizontal direction. The range hood is arranged directly above the cooktop. The casing 4 is hiddenly arranged in the cabinet. When the smoke guide plate 9 is in the first position, the outer wall of the air flow driving device 15 fills the gap at the bottom of the cabinet, so that the range hood and the cabinet as a whole have a cuboid shape. When the smoke guide plate 9 is in the second position, the air flow driving device 15 protrudes and is arranged at the front side of the cabinet.

[0118] Optionally, when the range hood is installed in the cabinet, only the outer wall of the air flow driving device 15 can be seen in the horizontal direction. The range hood is arranged directly above the cooking appliance. The casing 4 is arranged in the cabinet in a hidden manner. When the smoke guide plate 9 is in the first position, the top wall of the smoke guide plate 9 abuts against the bottom edge of the cabinet. When the smoke guide plate 9 is in the second position, the air flow driving device 15 protrudes and is arranged on the front side of the cabinet.

[0119] Optionally, when the smoke guide plate 9 is in the first position, the smoke guide plate 9 can be completely or partially embedded in the casing 4, and the smoke guide plate 9 completely closes the air inlet. Preferably, at this time, the rear end of the smoke guide plate 9 abuts against the oil cup.

[0120] The components of different embodiments can be combined with each other in any feasible manner to achieve the purpose of the present application.

[0121] The above is only an optional embodiment of some implementation scenarios of the present application. It should be noted that, for those skilled in the art, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present application without departing from the technical concept of the present application also belongs to the protection scope of the present application.

Claims

1. A range hood, comprising a housing (4) and a centrifugal fan (3) arranged in the housing (4), characterized in that: the centrifugal fan (3) comprises a first air inlet (1) which is open towards a first wall (5) of the housing (4); a first air passage (7) is formed between the first air inlet (1) and the first wall (5); a first oil filter plate (11) is arranged in the first air passage (7) and is arranged to guide the oil fume flow escaping upward along the first air passage (7) to the first air inlet (1); the first oil filter plate (11) is fixed to the first wall (5); the first oil filter plate (11) comprises a fixed plate (13) and a guide plate (14); the fixed plate (13) and the guide plate (14) are integrally formed from a metal plate; the fixed plate (13) is fixed to the first wall (5); the guide plate (14) is arranged in the first air passage (7).

2. The range hood according to claim 1, characterized in that: the first oil filter plate (11) is arranged to guide the oil fume flow escaping upward along the first air passage (7) to the lower half of the first air inlet (1); and / or the first air inlet (1) is circular, and the free end of the first oil filter plate (11) is not higher than the center of the first air inlet (1); and / or the free end of the first oil filter plate (11) extends downward from the first wall (5) and inclines toward the first air inlet (1); and / or the free end of the first oil filter plate (11) extends upward from the first wall (5) and inclines toward the first air inlet (1); and / or the free end of the first oil filter plate (11) extends horizontally from the first wall (5) and toward the first air inlet (1); and / or the first wall (5) is a front wall of the housing (4); and / or the first wall (5) is arranged vertically; and / or the first oil filter plate (11) comprises a V-shaped guide plate body which is open downward, and the free end of the V-shaped guide plate body extends downward and inclines toward the first air inlet (1); and / or the first oil filter plate (11) comprises a ^-shaped guide plate body which is open downward, and the free end of the ^-shaped guide plate body extends downward and inclines toward the first air inlet (1).

3. The range hood according to claim 1, characterized in that: the centrifugal fan (3) comprises a second air inlet (2) which is arranged opposite to the first air inlet (1); the second air inlet (2) is open towards a second wall (6) of the housing (4); a second air passage (8) is formed between the second air inlet (2) and the second wall (6); a second oil filter plate (12) is arranged in the second air passage (8) and is arranged to guide the oil fume flow escaping upward along the second air passage (8) to the second air inlet (2).

4. The range hood according to claim 3, characterized in that: The second oil filtering plate (12) is arranged to guide the oil fume flow escaping upward along the second air flow passage (8) to the lower half of the second air flow inlet (2); and / or The second air flow inlet (2) is circular, and the free end of the second oil filtering plate (12) is not higher than the center of the second air flow inlet (2); and / or The free end of the second oil filtering plate (12) extends downwardly from the second wall body (6) toward the second air flow inlet (2); and / or The free end of the second oil filtering plate (12) extends upwardly from the second wall body (6) toward the second air flow inlet (2); and / or The free end of the second oil filtering plate (12) extends horizontally from the second wall body (6) toward the second air flow inlet (2); The second wall body (6) is the rear side wall of the machine shell (4); and / or The second wall body (6) is arranged vertically; and / or The second oil filtering plate (12) comprises a V-shaped flow guide plate body with an open downward, and the free end of the V-shaped flow guide plate body extends downwardly toward the second air flow inlet (2); and / or The second oil filtering plate (12) comprises a ^-shaped flow guide plate body with an open downward, and the free end of the ^-shaped flow guide plate body extends downwardly toward the second air flow inlet (2).

5. The extractor hood according to claim 1, characterized in that: the cyclone filtering device (16) comprises a plurality of cyclone ducts arranged side by side; the centrifugal fan (3) and the cyclone filtering device (16) are arranged in the machine shell (4) in sequence from top to bottom; one end of the cyclone duct is provided with a first air outlet (17) arranged to deliver air flow to the first air flow passage (7).

6. The extractor hood according to claim 5, characterized in that: the first air outlet (17) is located directly below the first air flow passage (7); and / or the first air outlet (17) is located directly below the first oil filtering plate (11); and / or the first air outlet (17) is an open obliquely upward inclined cut; and / or the cyclone filtering device (16) is arranged obliquely in the machine shell (4), and one end of the cyclone duct provided with the first air outlet (17) is tilted upward, and the first air outlet (17) extends obliquely upward toward the first wall body (5).

7. The extractor hood according to claim 5, characterized in that: the bottom of the machine shell (4) is provided with an open downward air inlet; the hood (9) protrudes from the front side of the machine shell (4) to form an eave portion; the air flow driving device (15) is arranged at the free end of the hood (9); and the air flow driving device (15) is arranged to deliver an induced air flow to the cyclone filtering device (16).

8. The extractor hood according to claim 7, characterized in that: ​ The smoke guide plate (9) is arranged to be adapted to switch between a first position and a second position; A wall of the cyclone duct is provided with an air inlet opening, the air inlet opening being open towards the air inlet located below the air inlet opening; When the smoke guide plate (9) is in the first position, the smoke guide plate (9) is completely or partially embedded in the casing (4), the smoke guide plate (9) completely or partially closes the air inlet, and the cyclone filter device (16) is located above the smoke guide plate (9); When the smoke guide plate (9) is in the second position, the smoke guide plate (9) is completely or partially moved forward out of the casing (4) to form the eave portion; When the smoke guide plate (9) is in the second position, the airflow driving device (15) is arranged to be adapted to deliver an induced airflow to the air inlet of the cyclone filter device (16).

9. The extractor hood according to claim 8, characterized in that: When the smoke guide plate (9) is in the first position, the casing (4) and the smoke guide plate (9) are both cuboid-shaped as a whole; and / or The air inlet is located at the bottom end of the extractor hood; and / or The bottom edge of the casing (4) is the bottom end of the extractor hood; and / or The first wall body (5) is the front side wall of the casing (4); and / or The airflow outlet of the airflow driving device (15) is directed towards the air inlet located at the rear side of the airflow outlet.

10. The extractor hood according to claim 5, characterized in that: The bottom edge of the casing (4) is the bottom end of the extractor hood; and / or The first wall body (5) is the front side wall of the casing (4).

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