Range hoods

Abstract

The present application proposes an improved range hood. One embodiment of the present application is about a range hood, comprising a shell, a smoke guide plate and a driving device; the smoke guide plate is configured to switch between a first position and a second position under the drive of the driving device; when the smoke guide plate is in the first position, the smoke guide plate is completely or partially embedded in the shell; when the smoke guide plate is in the second position, the smoke guide plate moves forward out of the shell to form an eaves; when the smoke guide plate switches from the first position to the second position, the smoke guide plate moves linearly from the back to the front; the driving device comprises an electric motor, a screw rod, a slider and a transmission member; the slider is provided with a threaded hole, and the threaded hole is engaged with the screw rod; the transmission member is connected between the slider and the smoke guide plate; the electric motor is configured to drive the screw rod to rotate, the rotating screw rod drives the slider to move along the screw rod, and the moving slider drives the smoke guide plate to switch between the first position and the second position through the transmission member. A new smoke guide plate driving scheme is proposed.

Description

[Technical field]

[0001] The present application relates to the field of range hoods. [Background technology]

[0002] In Asia, due to the traditional cooking habit of stir-frying, the oil content in the smoke produced during cooking is particularly high. Therefore, the range hood used to extract the oil smoke produced during cooking has become an important household appliance that is indispensable for daily life. As people's requirements for the quality of life continue to increase, range hoods are also constantly upgraded and improved. At present, there are many range hoods with movable smoke guide plates. However, there are still many problems in the existing driving scheme of the smoke guide plate that need to be further improved and improved. For example, part of the structure of the driving device for driving the smoke guide plate is exposed to the outside, which is easy to be stained, inconvenient to clean, and affects the appearance. For another example, the movable smoke guide plate is often used to close the air inlet of the range hood, and the driving device for driving the smoke guide plate is also located at the air inlet, which will hinder the flow of airflow to a certain extent, and the airflow is not smooth.

[0003] Unless there is sufficient evidence to support it, the prior art described herein does not mean that the prior art is known to ordinary technicians in the field involved in this application before the filing date of this application. [Summary of the invention]

[0004] One purpose of the embodiments of the present application is to provide an improved range hood in view of at least one of the above technical problems and / or other possible technical problems not mentioned in the present application.

[0005] One embodiment of the present application is about a range hood, comprising a housing, a smoke guide plate and a driving device; the smoke guide plate is configured to be suitable for switching between a first position and a second position under the drive of the driving device; when the smoke guide plate is in the first position, the smoke guide plate is completely or partially embedded in the housing; when the smoke guide plate is in the second position, the smoke guide plate moves forward out of the housing to form an eaves; when the smoke guide plate switches from the first position to the second position, the smoke guide plate moves linearly from the back to the front; the driving device comprises an electric motor, a screw rod, a slider and a transmission member; the slider is provided with a threaded hole, and the threaded hole is meshed with the screw rod; the transmission member is connected between the slider and the smoke guide plate; the electric motor is configured to be suitable for driving the screw rod to rotate, the rotating screw rod drives the slider to move along the screw rod, and the moving slider drives the smoke guide plate to switch between the first position and the second position through the transmission member. Therefore, a new range hood smoke guide plate driving scheme is proposed.

[0006] In one or some embodiments, the driving device is hidden in the housing; and / or

[0007] The driving device is located above the smoke guide plate; and / or

[0008] The screw rod extends in a horizontal direction from the rear to the front, and the transmission member extends in a vertical direction.

[0009] The screw rod extends horizontally from the rear to the front, and the transmission member extends vertically, so that the screw rod and the transmission member have little interference with the oil fume airflow, and the airflow is smooth.

[0010] By adopting the technical solution of the present application, it is easy to realize that the driving device is located above the smoke guide plate. The arrangement of the driving device does not depend on the space in the moving direction of the smoke guide plate, which is convenient for realizing the thinning of the range hood. It is also convenient to hide the driving device in the shell part, and the driving device also makes it less interfered with the oil smoke airflow and the airflow is smooth.

[0011] In one or some embodiments, the driving device is hidden in the housing; the electric motor is located above the smoke guide plate, and the electric motor is spaced a certain distance from the smoke guide plate. Thus, the electric motor is deeply hidden, which has little interference with the oil smoke airflow, smooth airflow, and low noise.

[0012] In one or some embodiments, the range hood includes a centrifugal fan, which is disposed inside the housing; the driving device is suspended and fixed to the bottom of the volute of the centrifugal fan. Thus, the driving device has little interference with the oil smoke airflow, and the airflow is smooth.

[0013] In one or some embodiments, the electric motor directly drives the screw to rotate; or

[0014] The electric motor indirectly drives the lead screw to rotate through a worm gear transmission.

[0015] In one or some embodiments, when the slider moves along the screw rod, the slider moves linearly along a guide rail; one of the slider and the guide rail is provided with a groove, and the other is provided with a protrusion, and the protrusion is embedded in the groove.

[0016] In one or some embodiments, when the smoke guide plate switches from the first position to the second position, the smoke guide plate moves horizontally from the rear to the front; and / or

[0017] When the smoke guide plate is located at the first position, the smoke guide plate is completely embedded in the shell member, and the shell member and the smoke guide plate are both in a rectangular parallelepiped shape as a whole; and / or

[0018] When the smoke guide plate is located at the second position, the shell member and the smoke guide plate are both L-shaped as a whole.

[0019] In one or some embodiments, an air inlet opening facing downward is provided at the bottom of the shell member; when the smoke guide plate is located at the first position, the smoke guide plate completely or partially closes the air inlet opening.

[0020] In one or some embodiments, it includes an airflow driving device, which is arranged on the smoke guide plate and moves with the smoke guide plate; when the smoke guide plate is located at the second position, the airflow driving device is configured to be suitable for generating a wind curtain airflow to prevent the escape of oil smoke and / or an induced airflow to guide the oil smoke to flow into the air inlet.

[0021] In one or some embodiments, a downwardly open air inlet is provided at the bottom of the shell; an oil cup is suspended at the rear edge of the air inlet; when the smoke guide plate is in the first position, the smoke guide plate completely closes the air inlet, and the rear end edge of the smoke guide plate abuts against the oil cup from front to back.

[0022] When the smoke guide plate is located at the first position, the smoke guide plate completely closes the air inlet, and the rear end of the smoke guide plate abuts against the oil cup from front to back; thus, the smoke guide plate and the oil cup are cleverly matched, making the range hood simple in shape and easy to clean.

[0023] In one or some embodiments, when the smoke guide plate switches from the first position to the second position, the smoke guide plate moves horizontally from the back to the front; when the smoke guide plate is in the first position, the smoke guide plate is completely embedded in the shell member, and the shell member and the smoke guide plate are both rectangular as a whole; the range hood is configured to be suitable for embedding in a cabinet, and when looking at the cabinet from front to back along the horizontal direction, only the smoke guide plate of the range hood is visible.

[0024] It should be noted here that directional expressions such as "from back to front", "from front to back", "above", "open downwards", "bottom" etc. appearing in this application, unless otherwise specified, are based on the usual usage state of the range hood.

[0025] It should be pointed out here that the “first” and “second” appearing in this specification are only used for descriptive purposes and are not used to indicate relative importance; moreover, they are not a definition of the quantity of the features they define; in addition, they are not a definition of the logical or sequential relationship of the features they define.

[0026] The above technical solutions of the present application are not intended to describe all possible implementations of the present application. Throughout the application, guidance is provided by listing examples in many places, and these examples can be used in various feasible combinations.

Brief Description of the Drawings

[0027] The following drawings are only used to illustrate and explain the present application, and do not limit the scope of the present application, wherein:

[0028] Figure 1 is a schematic structural diagram of a range hood embodiment of the present application when the smoke guide plate is located at a first position;

[0029] Figure 2 is a structural schematic diagram of a range hood embodiment of the present application when the smoke guide plate is located at the second position;

[0030] Figure 3 yes Figure 2 A schematic structural diagram of the range hood embodiment shown in another viewing angle;

[0031] Figure 4 yes Figure 2 A partial structural schematic diagram of an embodiment of a range hood shown;

[0032] Figure 5 It is a partial structural schematic diagram of a range hood embodiment of the present application;

[0033] Figure 6 This is a schematic diagram of the installation and application state of a range hood embodiment of the present application;

[0034] Figure 7 This is a schematic diagram of the installation and application state of a range hood embodiment of the present application;

[0035] Figure 8 It is a partial structural schematic diagram of another range hood embodiment of the present application.

[0036] Reference numerals:

[0037] 1-housing, 2-smoke guide plate, 3-electric motor, 4-screw, 5-slider, 6-transmission member, 7-worm gear, 8-worm, 9-fixed rail, 10-movable slide rail, 11-first guide rail, 12-second guide rail, 13-cyclone filter device, 14-oil cup, 15-centrifugal fan, 16-airflow drive device, 17-motor, 18-air duct seat, 19-cabinet, 20-stove. [Specific implementation method]

[0038] In order to make the technical problems, technical solutions and beneficial technical effects to be solved by the present application clearer, the present application will be further described in detail in conjunction with the accompanying drawings and multiple exemplary embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the scope of protection of the present application, and each embodiment may share the same view or multiple views for description, but all features appearing in the same figure cannot be interpreted as features that must be possessed by an embodiment. On the contrary, as long as they are not mutually exclusive technically, they can be combined in any suitable manner. Moreover, for the sake of simplicity, different embodiments of different aspects may be presented in the same specific design, but such presentation does not mean that the embodiments of these aspects should appear together. The disassembly and / or combination of all possible embodiments and / or technical features should also take into account the description of the specification and the content that can be directly and unambiguously determined by those skilled in the art based on the description of the specification.

[0039] The present application proposes an embodiment of a range hood, comprising a housing 1, a smoke guide plate 2, a cyclonic filter device 13, an oil cup 14, a centrifugal fan 15, an air duct seat 18 and a driving device, such as Figures 1 to 7 As shown, the air duct seat 18 is arranged on the top wall of the housing 1. The oil cup 14 is in the shape of a long strip groove with an open opening facing upward.

[0040] The smoke guide plate 2 is configured to switch between a first position and a second position under the drive of the driving device. When the smoke guide plate 2 is in the first position, the smoke guide plate 2 is completely embedded in the housing 1. Figure 1 and 6 When the smoke guide plate 2 is in the second position, the smoke guide plate 2 moves forward out of the housing 1 to form an eaves portion, as shown in FIG. Figure 2 , 3 7. When the smoke guide plate 2 switches from the first position to the second position, the smoke guide plate 2 moves linearly from the rear to the front. The smoke guide plate 2 is in the shape of a thin plate. When the smoke guide plate 2 switches from the first position to the second position, the smoke guide plate 2 moves along its extension direction. The bottom of the housing 1 is provided with an air inlet that is open downward. When the smoke guide plate 2 is in the first position, the smoke guide plate 2 partially closes the air inlet.

[0041] The driving device includes an electric motor 3, a screw rod 4, a slider 5 and a transmission member 6. Figure 4 and 5As shown. The slider 5 is provided with a threaded hole, and the threaded hole meshes with the screw 4. The transmission member 6 is connected between the slider 5 and the smoke guide plate 2. One end of the transmission member 6 is fixed to the slider 5, and the other end of the transmission member 6 is fixed to the smoke guide plate 2. The electric motor 3 is configured to drive the screw 4 to rotate, and the rotating screw 4 drives the slider 5 to move along the screw 4, and the moving slider 5 drives the smoke guide plate 2 to switch between the first position and the second position through the transmission member 6. When the rotation direction of the screw 4 changes, the direction in which the slider 5 moves along the screw 4 also changes accordingly. When the smoke guide plate 2 is in the second position, the slider 5 is located at the free end of the screw 4, as shown in FIG. Figure 4 and 5 When the smoke guide plate 2 switches from the second position to the first position, the slider 5 moves from the free end of the screw rod 4 along the screw rod 4 toward the electric motor 3 .

[0042] The driving device is hidden in the housing 1. When the range hood is in normal use, the user cannot see the driving device. The driving device is located above the smoke guide plate 2. Specifically, Figure 4 As shown, the electric motor 3 is located above the smoke guide plate 2, and there is a certain distance between the electric motor 3 and the smoke guide plate 2. The screw rod 4 is also located above the smoke guide plate 2, and there is a certain distance between the screw rod 4 and the smoke guide plate 2. Therefore, the electric motor 3 and the screw rod 4 are both far away from the air inlet, and the interference of the two on the air flow is small; moreover, the two have a good hiding effect and have little impact on the appearance of the range hood.

[0043] The screw rod 4 extends horizontally from the rear to the front, and the transmission member 6 extends vertically. Figure 4 The transmission member 6 is in the shape of a rod. The extending direction of the transmission member 6 is roughly consistent with the flow direction of the oil fume airflow. The transmission member 6 has little interference with the oil fume airflow, so the airflow is smooth.

[0044] When the slider 5 moves along the screw rod 4, the slider 5 moves linearly along the first guide rail 11. The slider 5 is provided with a groove, and the first guide rail 11 is provided with a protrusion. The protrusion is embedded in the groove, such as Figure 5 As shown, the protrusion is suitable for linear movement along the groove.

[0045] The drive device is also provided with a second guide rail 12, such as Figure 5 As shown. The slider 5 is provided with a through hole for the second guide rail 12 to pass through. When the slider 5 moves along the screw rod 4, the slider 5 moves linearly along the second guide rail 12. The threaded hole is located between the first guide rail 11 and the second guide rail 12. The screw rod 4 is also located between the first guide rail 11 and the second guide rail 12. Specifically, the first guide rail 11 is located below the threaded hole and the screw rod 4. The second guide rail 12 is located above the threaded hole and the screw rod 4.

[0046] The first guide rail 11 is provided with a first receiving groove. The second guide rail 12 is provided with a second receiving groove. The first receiving groove and the second receiving groove are arranged opposite to each other. The upper part of the screw rod 4 is placed in the first receiving groove, and the lower part of the screw rod 4 is placed in the second receiving groove. Figure 5 shown.

[0047] The centrifugal fan 15 is arranged in the housing 1. The centrifugal fan 15 includes a volute, a multi-blade centrifugal impeller and a motor. The multi-blade centrifugal impeller and the motor are both arranged in the volute. The motor is configured to drive the multi-blade centrifugal impeller to rotate to exhaust oil smoke. The volute includes a first side wall, a second side wall and an annular wall. The annular wall is connected and arranged between the first side wall and the second side wall.

[0048] The electric motor 3 is fixed to the volute of the centrifugal fan 15, such as Figure 4 Specifically, the electric motor 3 is suspended and fixed at the bottom of the volute of the centrifugal fan 15 .

[0049] The first side wall is provided with a first fixing bracket. The first fixing bracket is fixed to the first side wall by screws. The second side wall is provided with a second fixing bracket. The second fixing bracket is fixed to the second side wall by screws. One end of the driving device is fixed to the first fixing bracket, and the other end of the driving device is fixed to the second fixing bracket, thereby achieving the purpose of hanging and fixing the driving device to the volute of the centrifugal fan 15, as shown in FIG. Figure 4 The driving device is suspended and fixed at the bottom of the volute of the centrifugal fan 15, and the screw 4 extends horizontally from the rear to the front, so that the driving device is located in the middle of the airflow path, and the driving device divides the airflow path into two, so that one part of the airflow flows from the left side of the driving device to the centrifugal fan 15, and the other part of the airflow flows from the right side of the driving device to the centrifugal fan 15. The driving device has little interference with the oil smoke airflow, and the airflow is smooth.

[0050] The electric motor 3 indirectly drives the screw 4 to rotate through the worm gear transmission. Figure 5 As shown, the worm wheel 7 is meshed with the worm 8. The electric motor 3 drives the worm 8 to rotate. The rotating worm 8 drives the worm wheel 7 to rotate synchronously. The rotating worm wheel 7 drives the screw 4 to rotate synchronously.

[0051] When the smoke guide plate 2 switches from the first position to the second position, the smoke guide plate 2 moves horizontally from the rear to the front. When the smoke guide plate 2 is in the first position, the smoke guide plate 2 is completely embedded in the shell 1, and the shell 1 and the smoke guide plate 2 are in a rectangular shape as a whole. Figure 1 When the smoke guide plate 2 is located at the second position, the housing 1 and the smoke guide plate 2 are both L-shaped as a whole. Figure 2 and 3 shown.

[0052] When the smoke guide plate 2 switches from the first position to the second position, the smoke guide plate 2 moves horizontally from the rear to the front. A slide rail structure is provided between the smoke guide plate 2 and the housing 1, so that when the smoke guide plate 2 switches from the first position to the second position, the smoke guide plate 2 moves horizontally from the rear to the front relative to the housing 1. Specifically, fixed rails 9 are provided on both the left and right sides of the housing 1, and movable slide rails 10 are provided on both the left and right sides of the smoke guide plate 2. The two movable slide rails 10 correspond one-to-one to the two fixed rails 9, such as Figure 3 and 4 When the smoke guide plate 2 switches between the first position and the second position, the movable slide rail 10 slides along the corresponding fixed rail 9. It should be noted that Figure 3 and 4 This is just a schematic diagram and may not be accurate enough. In this case, please refer to the text description.

[0053] The cyclone filter device 13 is disposed in the housing 1. Figure 3 and 4 As shown. The cyclone filter device 13 is located below the centrifugal fan 15. The electric motor 3, the screw rod 4 and the slider 5 are located above the cyclone filter device 13. The electric motor 3, the screw rod 4 and the slider 5 are located below the centrifugal fan 15. It can be seen that the electric motor 3, the screw rod 4 and the slider 5 are located between the cyclone filter device 13 and the centrifugal fan 15. The transmission member 6 passes through the cyclone filter device 13. Accordingly, the cyclone filter device 13 is provided with a clearance hole for the transmission member 6 to pass through.

[0054] The range hood embodiment includes an air flow driving device 16, such as Figure 3 As shown. The airflow driving device 16 is arranged on the smoke guide plate 2. The airflow driving device 16 is arranged to be suitable for moving with the smoke guide plate 2. The airflow driving device 16 is arranged at the front end of the smoke guide plate 2. The airflow output port of the airflow driving device 16 is open downward.

[0055] The air flow driving device 16 includes an impeller and a motor 17 for driving the impeller, such as Figure 3 and 4 As shown. When the smoke guide plate 2 is in the second position, the airflow driving device 16 is configured to be suitable for generating an induced airflow to guide the oil smoke to flow into the air inlet. In other words, when the smoke guide plate 2 is in the second position, the airflow driving device 16 is configured to be suitable for delivering the induced airflow to the cyclone filter device 13. Specifically, the motor 17 of the airflow driving device 16 drives the impeller to rotate to generate the induced airflow. Therefore, the centrifugal fan 15, the airflow driving device 16 and the cyclone filter device 13 are cleverly coordinated to significantly improve the oil smoke extraction efficiency.

[0056] The cyclone filter device 13 is arranged obliquely in the housing 1. The cyclone filter device 13 includes a plurality of cyclone ducts arranged side by side, such as Figure 3 and 4 As shown. A first exhaust port is provided at the end of the cyclone duct that is tilted upward. The first exhaust port faces the front side wall of the shell member 1. An air inlet is provided on the pipe wall of the cyclone duct. The air inlet is open to the air inlet located below it. The first exhaust port is provided at one end of the cyclone duct, and the other end of the cyclone duct is roughly closed and only has an oil leakage hole. The oil leakage hole is located just above the opening of the oil cup 14, so that the waste oil filtered out of the cyclone duct can flow into the oil cup 14.

[0057] When the range hood is in operation, the centrifugal fan 15 and the airflow driving device 16 are both in operation. Under the joint action of the centrifugal fan 15 and the airflow driving device 16, the oil fume airflow flows into the air inlet of the shell 1, and then the oil fume airflow flows through the centrifugal fan 15, and then the oil fume airflow flows through the air duct seat 18 and is discharged into the exhaust pipe, and then the oil fume airflow flows into the public flue.

[0058] The range hood is configured to be embedded in the cabinet 19. When looking at the cabinet 19 from the front to the back in the horizontal direction, only the smoke guide plate 2 of the range hood is visible. Figure 6 and 7 As shown. The range hood is located just above the cooking range 20. Thus, the range hood and the cabinet 19 have a good integration effect.

[0059] For example, the present application proposes another range hood embodiment, when the slider 5 moves along the screw rod 4, the slider 5 moves linearly along a guide rail, the guide rail is provided with a groove, the slider 5 is provided with a protrusion, the protrusion is embedded in the groove, and the protrusion is suitable for linear movement along the groove. This embodiment focuses on the differences from the above embodiment, and the same and similar parts of this embodiment can refer to the above embodiment.

[0060] For example, the present application proposes another embodiment of a range hood, in which the bottom of the housing 1 is provided with an air inlet that is open downward, and an oil cup 14 is suspended at the rear edge of the air inlet. When the smoke guide plate 2 is in the first position, the smoke guide plate 2 completely closes the air inlet, and the rear edge of the smoke guide plate 2 abuts against the oil cup 14 from front to back. In the horizontal direction from front to back, the oil cup 14 is blocked by the smoke guide plate 2. This embodiment focuses on the differences from the above embodiment, and the same and similar parts of this embodiment can refer to the above embodiment.

[0061] For example, the present application proposes another range hood embodiment, in which the electric motor 3 directly drives the screw 4 to rotate, such as Figure 8 As shown. The slider 5 is in the shape of a nut. No guide rail is provided, so the structure is simpler, the cost is low, and the corresponding functions can be achieved. This embodiment focuses on the differences from the above embodiment, and the same and similar parts of this embodiment can refer to the above embodiment.

[0062] For example, the present application proposes another range hood embodiment, in which when the smoke guide plate 2 is in the second position, the airflow driving device 16 is configured to generate an air curtain airflow for preventing smoke from escaping. This embodiment focuses on the differences from the above embodiment, and the same or similar parts of this embodiment can be referred to the above embodiment.

[0063] For example, the present application proposes another range hood embodiment, in which a first exhaust port is provided at one end of the cyclone duct and a second exhaust port is provided at the other end of the cyclone duct. This embodiment focuses on the differences from the above embodiment, and the same or similar parts of this embodiment can be referred to the above embodiment.

[0064] Although specific embodiments have been described above, these embodiments are not intended to limit the scope of the present disclosure, even when only a single embodiment is described with respect to specific features. The feature examples provided in the present disclosure are intended to be illustrative, not limiting, unless otherwise expressly stated. In specific implementations, multiple features can be combined with each other where technically feasible, depending on actual needs. Various substitutions, changes, and modifications may also be conceived without departing from the spirit and scope of the present application.

Claims

1. A range hood, characterized in that: It comprises a housing (1), a smoke guide plate (2) and a driving device; The smoke guide plate (2) is configured to be capable of switching between a first position and a second position under the drive of the drive device; When the smoke guide plate (2) is located at the first position, the smoke guide plate (2) is completely or partially embedded in the housing (1); When the smoke guide plate (2) is located at the second position, the smoke guide plate (2) moves forward out of the housing (1) to form an eaves portion; When the smoke guide plate (2) switches from the first position to the second position, the smoke guide plate (2) moves linearly from the rear to the front; The driving device comprises an electric motor (3), a screw rod (4), a slider (5) and a transmission member (6); The slider (5) is provided with a threaded hole, and the threaded hole is meshed with the screw rod (4); The transmission member (6) is connected between the slider (5) and the smoke guide plate (2); The electric motor (3) is configured to drive the screw rod (4) to rotate, the rotating screw rod (4) drives the slider (5) to move along the screw rod (4), and the moving slider (5) drives the smoke guide plate (2) to switch between the first position and the second position through the transmission member (6).

2. The range hood according to claim 1, characterized in that: The driving device is hidden in the housing (1); and / or The driving device is located above the smoke guide plate (2); and / or The screw rod (4) extends in a horizontal direction from the rear to the front, and the transmission member (6) extends in a vertical direction.

3. The range hood according to claim 1, characterized in that: The driving device is hidden in the housing (1); The electric motor (3) is located above the smoke guide plate (2), and the electric motor (3) and the smoke guide plate (2) are spaced apart from each other.

4. The range hood according to claim 3, characterized in that: The range hood comprises a centrifugal fan (15), and the centrifugal fan (15) is arranged inside the housing (1); The driving device is suspended and fixed to the bottom of the volute of the centrifugal fan (15).

5. The range hood according to claim 1, characterized in that: The electric motor (3) directly drives the screw rod (4) to rotate; or The electric motor (3) indirectly drives the screw rod (4) to rotate via a worm gear transmission.

6. The range hood according to claim 1, characterized in that: When the slider (5) moves along the screw rod (4), the slider (5) moves linearly along a guide rail; One of the slider (5) and the guide rail is provided with a groove, and the other is provided with a protrusion, and the protrusion is embedded in the groove.

7. The range hood according to claim 1, characterized in that: When the smoke guide plate (2) switches from the first position to the second position, the smoke guide plate (2) moves horizontally from the rear to the front; and / or When the smoke guide plate (2) is located at the first position, the smoke guide plate (2) is completely embedded in the shell member (1), and the shell member (1) and the smoke guide plate (2) are both in a rectangular parallelepiped shape as a whole; and / or When the smoke guide plate (2) is located at the second position, the housing (1) and the smoke guide plate (2) are both L-shaped as a whole.

8. The range hood according to claim 1, characterized in that: The bottom of the housing (1) is provided with an air inlet opening which is open downwards; When the smoke guide plate (2) is located at the first position, the smoke guide plate (2) completely or partially closes the air inlet.

9. The range hood according to claim 8, characterized in that: It comprises an airflow driving device (16), which is arranged on the smoke guide plate (2) and moves together with the smoke guide plate (2); When the smoke guide plate (2) is located at the second position, the airflow driving device (16) is configured to generate an air curtain airflow to prevent the escape of oil smoke and / or an induced airflow to guide the oil smoke to flow into the air inlet.

10. The range hood according to claim 1, characterized in that: The bottom of the housing (1) is provided with an air inlet opening facing downward; An oil cup (14) is suspended at the rear edge of the air inlet; When the smoke guide plate (2) is located at the first position, the smoke guide plate (2) completely closes the air inlet, and the rear end of the smoke guide plate (2) abuts against the oil cup (14) from front to back.

11. The range hood according to claim 1, characterized in that: When the smoke guide plate (2) switches from the first position to the second position, the smoke guide plate (2) moves horizontally from the rear to the front; When the smoke guide plate (2) is located at the first position, the smoke guide plate (2) is completely embedded in the shell member (1), and the shell member (1) and the smoke guide plate (2) are both in a rectangular parallelepiped shape as a whole; The range hood is configured to be embedded in a cabinet (19), and when looking at the cabinet (19) from front to back in a horizontal direction, only the smoke guide plate (2) of the range hood is visible.

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