A range hood and its control method

Abstract

This invention relates to the field of kitchen appliance technology, and more particularly to a range hood and its control method. The range hood includes a housing, two smoke collection hoods, and two drive mechanisms. The two smoke collection hoods are spaced apart within the housing and have a working state extending outwards from the housing and a retracted state retracted into the housing. The two drive mechanisms correspond one-to-one with the two smoke collection hoods and are configured to drive the smoke collection hoods to translate along a first axis and rotate around the first axis, which extends along the height of the housing. The drive mechanisms can switch the smoke collection hoods between the working state and the retracted state. When the smoke collection hood is in the working state, it covers the side of the stove, concentrating the negative pressure above the stove, reducing the negative pressure range, and improving the smoke extraction effect. Furthermore, when in the retracted state, the smoke collection hood is parallel to the front and rear sides of the housing, and its length is not limited by the width of the housing.

Description

Technical Field

[0001] This invention relates to the field of kitchen appliance technology, and in particular to a range hood and its control method. Background Technology

[0002] Range hoods are widely used appliances in kitchens to remove cooking fumes produced during cooking. To improve smoke extraction, some range hoods now feature movable smoke inlets. When not cooking, the smoke inlet is hidden inside the cavity; during cooking, it moves closer to the smoke source, effectively drawing away the fumes and improving extraction efficiency. However, existing technology still has some problems. First, some smoke inlet components, when opened, are located on the side against the wall, meaning the actual smoke inlet is still far from the smoke source, resulting in less than ideal smoke extraction in actual use. Second, some smoke inlet components are located on the left and right sides of the stove, but their opening mechanism is generally a rotation around an axis along the front-to-back direction of the range hood. When retracted, the length of the smoke inlet component is aligned with the front-to-back direction of the range hood housing. To avoid making the overall size of the range hood too large, the length of the smoke inlet component is limited, affecting the smoke extraction effect. Summary of the Invention

[0003] The purpose of this invention is to provide a range hood and its control method, which improves the smoke extraction effect.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A range hood, comprising:

[0006] Box;

[0007] Two smoke hoods are spaced apart in the housing. The smoke hoods have a working state that extends to the outside of the housing and a retracted state that is stored inside the housing. When the smoke hoods are in the working state, they are parallel to the left and right sides of the housing. When the smoke hoods are in the stored state, they are parallel to the front and rear sides of the housing.

[0008] Two drive mechanisms correspond one-to-one with two smoke collection hoods. The drive mechanisms are configured to drive the smoke collection hoods to perform translational motion along the first axis and rotational motion around the first axis, which extends along the height of the housing. The drive mechanisms can drive the smoke collection hoods to switch between working and stored states.

[0009] In a preferred embodiment of the range hood, the drive mechanism includes:

[0010] At least two guide rods, each with external threads;

[0011] The lifting drive motor and transmission assembly are included. The lifting drive motor can drive the guide rod to rotate around its own axis through the transmission assembly.

[0012] The rotating assembly includes an inner ring and an outer ring. The inner ring has at least two guide holes, which correspond one-to-one with guide rods. The guide holes are provided with internal threads and are threadedly connected to the guide rods. The outer ring is fitted onto the inner ring and can rotate relative to the inner ring. The smoke hood is connected to the outer ring.

[0013] The rotary drive assembly is capable of driving the outer ring to rotate relative to the inner ring.

[0014] As a preferred embodiment of the range hood, the range hood also includes two chimneys, which are set inside the housing. The two chimneys correspond one-to-one with two smoke collection hoods. Each chimney has a flue, and the axis of the chimney is the first axis. Multiple guide rods are distributed at intervals along the circumference of the chimney, with the inner ring fitted on the chimney and threadedly connected to the guide rods.

[0015] As a preferred embodiment of the range hood, the smoke collection hood has a smoke collection chamber that is connected to the flue; when the smoke collection hood is in working condition, a smoke inlet is provided on the lower part of the side facing the stove, and the smoke inlet is connected to the smoke collection chamber.

[0016] As a preferred embodiment of the range hood, the chimney is provided with a smoke inlet and a smoke outlet that are connected to the flue. The outer ring is provided with a first smoke outlet that is connected to the smoke collection chamber, and the inner ring is provided with a second smoke outlet that is connected to the smoke inlet. When the smoke collection hood is in working condition, the first smoke outlet and the second smoke outlet are directly opposite each other.

[0017] As a preferred embodiment of the range hood, it also includes an air curtain assembly, which can form an air curtain extending along the length of the smoke collection hood at the lower end of the smoke collection hood.

[0018] In a preferred embodiment of the range hood, the air curtain assembly includes a fan and an air outlet shell. An air curtain cavity is provided inside the smoke collection hood, which is not connected to the smoke collection cavity. The smoke collection hood is provided with a first air inlet and an outlet that are connected to the air curtain cavity. The outlet is located at the lower end of the smoke collection hood and extends along the length of the smoke collection hood. Both the fan and the air outlet shell are located inside the air curtain cavity. A second air inlet is provided at the upper end of the air outlet shell, which is connected to the air outlet of the fan. An air curtain outlet is provided at the lower end of the air outlet shell, which extends along the length of the smoke collection hood and extends out of the smoke collection hood through the outlet.

[0019] As a preferred embodiment of the range hood, the air curtain outlet is a long straight hole or an arc-shaped long hole distributed along the length of the smoke collection hood.

[0020] As a preferred embodiment of the range hood, the air curtain outlet includes one or two sets of small holes. When there is one set of small holes, the multiple small holes in one set are distributed in an arc shape along the length of the smoke collection hood. When there are two sets of small holes, the multiple small holes in each set are distributed in an arc shape along the length of the smoke collection hood, the two sets of small holes are spaced apart along the radius of the arc, and the two sets of small holes are staggered.

[0021] A control method for a range hood, applied to any of the above-described range hood designs, includes:

[0022] Turn on the stove;

[0023] Start the drive mechanism. The drive mechanism first drives the smoke collection hood to move downward a set distance along the first axis. Then the drive mechanism drives the smoke collection hood to rotate 90 degrees around the first axis in a direction away from the other smoke collection hood.

[0024] Turn off the stove;

[0025] Restart the drive mechanism. The drive mechanism first drives the smoke collection hood to rotate 90 degrees around the first axis toward the other smoke collection hood. Then the drive mechanism drives the smoke collection hood to move upward a set distance along the first axis.

[0026] The beneficial effects of this invention are:

[0027] This invention provides a range hood and its control method, including a smoke collection hood. The smoke collection hood has a working state extending outwards from the casing and a retracted state retracted into the casing. When the smoke collection hood is in the working state, it is parallel to the left and right sides of the casing and covers the side of the stove, concentrating negative pressure above the stove, reducing the negative pressure range, increasing smoke suction, preventing smoke escape, and improving smoke extraction efficiency. When the smoke collection hood is in the retracted state, it is parallel to the front and rear sides of the casing and located inside the casing, ensuring the aesthetics of the range hood. Furthermore, when switching between the working and retracted states, the smoke collection hood can be translated and rotated via a drive mechanism. In the retracted state, the smoke collection hood is parallel to the front and rear sides of the casing, thus its length is not limited by the width of the casing. In the working state, the smoke collection hood is parallel to the left and right sides of the casing, ensuring sufficient coverage area on the side of the stove and guaranteeing effective smoke extraction. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the range hood provided in an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the smoke collection hood in the stored state according to an embodiment of the present invention;

[0030] Figure 3This is a schematic diagram of the descent process of the smoke hood involved in the embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram showing the smoke hood lowered into position according to an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the smoke collection hood rotated to the working state according to an embodiment of the present invention;

[0033] Figure 6 This is a schematic diagram of the structure of the smoke collection hood in the storage state according to an embodiment of the present invention;

[0034] Figure 7 This is a rear view of the smoke hood in its retracted state according to an embodiment of the present invention. Figure 1 ;

[0035] Figure 8 This is a rear view of the smoke collection hood in the working state according to the embodiments of the present invention;

[0036] Figure 9 This is a rear view of the smoke hood in its retracted state according to an embodiment of the present invention. Figure 2 ;

[0037] Figure 10 yes Figure 9 A magnified view of a section at point A in the middle;

[0038] Figure 11 This is a schematic diagram of the structure of the air curtain assembly involved in the embodiments of the present invention;

[0039] Figure 12 This is a schematic diagram of the structure of the air curtain outlet involved in the embodiment of the present invention. Figure 1 ;

[0040] Figure 13 This is a schematic diagram of the structure of the air curtain outlet involved in the embodiment of the present invention. Figure 2 ;

[0041] Figure 14 This is a schematic diagram of the structure of the air curtain outlet involved in the embodiment of the present invention. Figure 3 ;

[0042] Figure 15 This is a schematic diagram of the structure of the small hole involved in the embodiment of the present invention;

[0043] Figure 16 This is a schematic diagram of the rotating support frame involved in the embodiments of the present invention;

[0044] Figure 17 This is a schematic diagram of the guide surface involved in the embodiments of the present invention;

[0045] Figure 18This is a schematic diagram of the structure of the semiconductor cooling chip involved in the embodiments of the present invention.

[0046] In the picture:

[0047] 10. Box body;

[0048] 20. Chimney; 21. Smoke inlet; 22. Flue;

[0049] 30. Smoke hood; 31. Smoke inlet; 32. Smoke collection chamber; 33. Air curtain chamber; 34. Guide surface;

[0050] 41. Guide rod; 42. Lifting drive motor; 43. Rotating assembly; 431. Inner ring; 432. Outer ring; 433. Ball bearing; 44. Rotating drive assembly; 441. Coil; 442. Magnet;

[0051] 50. Air curtain assembly; 51. Fan; 52. Air outlet shell; 521. Air curtain outlet; 5211. Small hole; 5211a. First hole; 5211b. Second hole; 5211c. Third hole; 53. Rotary support frame; 54. Cooling element. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0053] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0054] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0055] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0056] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0057] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0058] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0059] like Figures 1 to 18As shown, this embodiment of the invention provides a range hood, including a housing 10, two chimneys 20, two smoke hoods 30, and two drive mechanisms. The housing 10 has an opening at its lower end. The two chimneys 20 are spaced apart within the housing 10, each chimney 20 having a flue 22. The axis of the flue 22 is a first axis extending along the height of the housing 10. The two smoke hoods 30 are correspondingly mounted on the two chimneys 20, with one smoke hood 30 corresponding to one of the two burners and the other smoke hood 30 corresponding to the other burner. The smoke hoods 30 have a working state extending outwards from the opening to the outside of the housing 10 and a retracted state retracted inwards from the opening to the inside of the housing 10. When the smoke hood 30 is in the working state, it is parallel to the left and right sides of the housing 10; when the smoke hood 30 is in the retracted state, it is parallel to the front and rear sides of the housing 10. Two drive mechanisms correspond one-to-one with two smoke collection hoods 30. The drive mechanisms are configured to drive the corresponding smoke collection hood 30 to perform translational motion along the first axis and rotational motion around the first axis. The drive mechanisms can drive the smoke collection hood 30 to switch between working state and storage state.

[0060] Reference Figures 2 to 5 When the smoke hood 30 switches from the storage state to the working state, the drive mechanism first drives the smoke hood 30 to move downward a certain distance along the first axis. Figures 2 to 4 (The process shown) is then followed by the drive mechanism driving the smoke hood 30 to rotate 90 degrees around the first axis in a direction away from the other smoke hood 30. Figures 4 to 5 (The process shown) positions the smoke hood 30 on one side of the corresponding burner. When the smoke hood 30 switches from the working state to the retracted state, the drive mechanism first drives the smoke hood 30 to rotate 90 degrees around the first axis toward the other smoke hood 30, and then the drive mechanism drives the smoke hood 30 to move upward a certain distance along the first axis. The two smoke hoods 30 can be controlled independently depending on whether the burner is open. When only the left burner is open, only the smoke hood 30 on the left can be controlled to switch to the working state. When only the right burner is open, only the smoke hood 30 on the right can be controlled to switch to the working state. When both burners are open at the same time, both smoke hoods 30 can be controlled to switch to the working state. It is understandable that when both smoke hoods 30 are in the retracted state, the two smoke hoods 30 are similar to the two doors of a double door being closed; when the smoke hood 30 switches from the retracted state to the working state, the process of the smoke hood 30 rotating 90 degrees around the first axis in a direction away from the other smoke hood 30 is similar to the process of the door opening; similarly, when the smoke hood 30 switches from the working state to the retracted state, the process of the smoke hood 30 rotating 90 degrees around the first axis in a direction closer to the other smoke hood 30 is similar to the process of the door closing.

[0061] When the fume hood 30 is in operation, it covers the side of the burner, concentrating negative pressure above the burner in use, reducing the negative pressure range, increasing fume suction, preventing fume escape, and improving smoke extraction efficiency. When the fume hood 30 is in its retracted state, it is located inside the housing 10, ensuring the aesthetics of the range hood. Furthermore, when switching between the operating and retracted states, the fume hood 30 can be moved by translation and rotation via a drive mechanism. This ensures that the fume hood 30 is parallel to the front and rear sides of the housing 10 in the retracted state, allowing its length to be unrestricted by the width of the housing 10. When in operation, the fume hood 30 is parallel to the left and right sides of the housing 10, ensuring sufficient coverage area on the side of the burner and maximizing smoke extraction efficiency.

[0062] Reference Figures 6 to 8 The fume hood 30 has a fume collection chamber 32, which is connected to the flue 22. When the fume hood 30 is in operation, a smoke inlet 31 is provided on the lower part of the side facing the stove, and the smoke inlet 31 is connected to the fume collection chamber 32. Multiple smoke inlets 31 can be provided, and these inlets can be distributed along the length of the fume hood 30 or arranged in a rectangular array along the length and height of the fume hood 30. When the fume hood 30 is in operation, the smoke inlets 31 are closer to the smoke source, which shortens the smoke extraction path and improves the smoke extraction effect.

[0063] Reference Figures 6 to 10The driving mechanism includes at least two guide rods 41, a lifting drive motor 42, a transmission assembly, a rotating assembly 43, and a rotating drive assembly 44. The at least two guide rods 41 are spaced apart along the circumference of the chimney 20, and each guide rod 41 has an external thread. The lifting drive motor 42 can drive the guide rods 41 to rotate around their own axis via the transmission assembly. The rotating assembly 43 includes an inner ring 431 and an outer ring 432. The inner ring 431 is fitted onto the chimney 20 and has at least two guide holes, each corresponding to one of the at least two guide rods 41. The guide holes have internal threads and are threadedly connected to the guide rods 41. The outer ring 432 is fitted onto the inner ring 431 and can rotate relative to the inner ring 431. The smoke hood 30 is connected to the outer ring 432. The rotating drive assembly 44 can drive the outer ring 432 to rotate relative to the inner ring 431. Preferably, a rotating support component, such as a ball bearing 433, is provided between the inner ring 431 and the outer ring 432. When the lifting drive motor 42 drives the guide rod 41 to rotate through the transmission assembly, since the guide rod 41 and the inner ring 431 are threadedly connected, the guide rod 41 can drive the rotating assembly 43 to undergo a combined rotational and translational motion. Because there are at least two guide rods 41, the rotational motion of the rotating assembly 43 is restricted, and the rotating assembly 43 only undergoes translational motion along the axial direction of the guide rod 41. It should be noted that when the lifting drive motor 42 drives the rotating assembly 43 to perform translational motion, the inner ring 431 and the outer ring 432 move as a whole; when the rotating drive assembly 44 drives the outer ring 432 to rotate, the inner ring 431 remains fixed, and only the outer ring 432 rotates.

[0064] In this embodiment, the transmission assembly (not shown in the figure) includes a turbine, which is mounted on the output shaft of the lifting drive motor 42. The guide rod 41 is a worm gear, and the turbine meshes with the worm gear. The lifting drive motor 42 can drive the worm gear to rotate via the turbine. Of course, this is only an exemplary illustration, and the structure of the transmission assembly is not limited to this. For example, the transmission assembly may also include a driving gear and a driven gear, with the driving gear mounted on the output shaft of the lifting drive motor 42 and the driven gear mounted on the guide rod 41, meshing with the driving gear. Any structure that can transmit the motion of the lifting drive motor 42 to the guide rod 41 is acceptable, and will not be listed here.

[0065] In this embodiment, reference is made to Figure 9 and Figure 10The rotary drive assembly 44 includes a coil 441 and a magnet 442. The coil 441 is electrically connected to a power source and is located on the outer circumferential surface of the inner ring 431. The magnet 442 is located on the inner circumferential surface of the outer ring 432. After the coil 441 passes through, it can drive the outer ring 432 to rotate relative to the inner ring 431. However, this is only an illustrative example, and the structure of the rotary drive assembly 44 is not limited to this. For example, the rotary drive assembly 44 can also include a rotary drive motor and a gear. The gear is located on the output shaft of the rotary drive motor, and the outer circumferential surface of the outer ring 432 has teeth that mesh with the gear. Any structure that can drive the outer ring 432 to rotate relative to the inner ring 431 is acceptable, and will not be listed here.

[0066] Additionally, it should be noted that you can refer to Figures 6 to 8 The chimney 20 is provided with a smoke inlet 21 and a smoke outlet communicating with the flue 22. The outer ring 432 is provided with a first smoke inlet communicating with the smoke collection chamber 32, and the inner ring 431 is provided with a second smoke inlet communicating with the smoke inlet 21. When the smoke hood 30 is in the retracted state, the first smoke inlet and the second smoke inlet are misaligned. When the smoke hood 30 switches from the retracted state to the working state, the outer ring 432 rotates relative to the inner ring 431. When the smoke hood 30 switches to the working state, the outer ring 432 rotates so that the first smoke inlet and the second smoke inlet are directly opposite each other. At this time, the fumes can enter the flue 22 in sequence through the smoke inlet 31, the smoke collection chamber 32, the first smoke inlet, the second smoke inlet, and the smoke inlet 21, and then flow into the air duct system through the smoke outlet.

[0067] The range hood provided in this embodiment of the invention also includes an air curtain assembly 50, which can form an air curtain extending along the length of the smoke collection hood 30 at its lower end. By providing the air curtain assembly 50, the smoke extraction effect can be further improved.

[0068] Specifically, refer to Figure 11 The smoke hood 30 is provided with an air curtain cavity 33, which is not connected to the smoke collection cavity 32. The smoke hood 30 is provided with a first air inlet and an outlet, both of which are connected to the air curtain cavity 33. The outlet is located at the lower end of the smoke hood 30 and extends along the length of the smoke hood 30. The air curtain assembly 50 is provided in the air curtain cavity 33. The air curtain assembly 50 includes a fan 51 and an air outlet shell 52. The upper end of the air outlet shell 52 is provided with a second air inlet, which is connected to the air outlet of the fan 51. The lower end of the air outlet shell 52 is provided with an air curtain outlet 521, which extends along the length of the smoke hood 30 and extends out of the smoke hood 30 through the outlet. After the fan 51 is started, it can draw air from outside the smoke hood 30 through the first air inlet and exhaust air through the air curtain outlet 521 to form an air curtain. Figure 11The dashed arrows indicate the formation path of the air curtain, while the solid arrows indicate the path of the cooking fumes.

[0069] In some embodiments, the air curtain outlet 521 can be a long straight hole distributed along the length of the smoke hood 30. In some embodiments, refer to Figure 12 The air curtain outlet 521 can also be an arc-shaped elongated hole distributed along the length of the smoke collection hood 30. In some embodiments, refer to Figure 13 The air curtain outlet 521 may also include a group of small holes 5211, with multiple small holes 5211 arranged in an arc shape along the length of the smoke collection hood 30. In some embodiments, refer to Figure 14 The air curtain outlet 521 may also include two sets of small holes 5211, with multiple small holes 5211 in each set distributed in an arc shape along the length of the smoke collection hood 30. The two sets of small holes 5211 are spaced apart along the radius of the arc, and the two sets of small holes 5211 are staggered. Preferably, refer to Figure 15 The orifice 5211 may include a first orifice 5211a, a second orifice 5211b, and a third orifice 5211c connected sequentially from top to bottom. Both the first orifice 5211a and the third orifice 5211c are funnel-shaped. The diameter of the first orifice 5211a gradually decreases from top to bottom, and the diameter of its lower end is equal to the diameter of the second orifice 5211b. The diameter of the third orifice 5211c gradually increases from top to bottom, and the diameter of its upper end is equal to the diameter of the second orifice 5211b. The orifice 5211 as a whole creates a Venturi effect, making it easier to capture cooking fumes and preventing their escape.

[0070] Furthermore, referring to Figure 16 The air curtain assembly 50 also includes a rotating support frame 53 and a rotating drive component. The air outlet shell 52 is rotatably mounted on the rotating support frame 53. The rotating drive component drives the air outlet shell 52 to rotate relative to the rotating support frame 53. The rotation axis of the air outlet shell 52 extends along the length of the smoke collection hood 30, thereby adjusting the angle of the air curtain. The adjustable angle range is α. The angle of the air curtain can be adjusted according to the cooking environment or the state of the oil fumes to better contain the oil fumes.

[0071] Furthermore, referring to Figure 17 The fume hood 30 has a guide surface 34, which connects the lower end face of the fume hood 30 to the side where the smoke inlet 31 is located. The guide surface 34 is an inclined surface that slopes along the flow direction of the oil fumes. By providing the guide surface 34, the flow of oil fumes can be guided. Preferably, the guide surface 34 is wavy. When the oil fumes pass through the wavy guide surface 34, their activity decreases, thereby improving the oil fume extraction effect.

[0072] Furthermore, referring to Figure 18A semiconductor cooling chip 54 is provided on the inner wall of the air curtain cavity 33. The air entering the air curtain cavity 33 through the first air inlet has a lower temperature under the action of the semiconductor cooling chip 54, so that a low temperature air curtain can be formed at the air curtain outlet 521. When the oil fumes encounter the low temperature air curtain, their activity is reduced, thereby improving the oil fume absorption effect.

[0073] This invention also provides a control method for a range hood, comprising the following steps:

[0074] Turn on the stove;

[0075] Start the drive mechanism. The drive mechanism first drives the smoke collection hood 30 to move downward a set distance along the first axis. Then the drive mechanism drives the smoke collection hood 30 to rotate 90 degrees around the first axis in a direction away from the other smoke collection hood 30.

[0076] Turn off the stove;

[0077] Restart the drive mechanism. The drive mechanism first drives the smoke collection hood 30 to rotate 90 degrees around the first axis toward the other smoke collection hood 30. Then the drive mechanism drives the smoke collection hood 30 to move upward a set distance along the first axis.

[0078] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A range hood, characterized in that, include: Box (10); Two smoke hoods (30) are spaced apart on the housing (10). The smoke hoods (30) have a working state extending to the outside of the housing (10) and a retracted state retracted to the inside of the housing (10). When the smoke hoods (30) are in the working state, they are parallel to the left and right sides of the housing (10). When the smoke hoods (30) are in the retracted state, they are parallel to the front and rear sides of the housing (10). Two drive mechanisms correspond one-to-one with the two smoke collection hoods (30). The drive mechanisms are configured to drive the smoke collection hoods (30) to translate along the first axis and rotate around the first axis, which extends along the height direction of the housing (10). The drive mechanisms can drive the smoke collection hoods (30) to switch between the working state and the storage state. When the smoke collection hood (30) switches from the storage state to the working state, the driving mechanism first drives the smoke collection hood (30) to move downward along the first axis, and then drives the smoke collection hood (30) to rotate around the first axis in a direction away from the other smoke collection hood (30); when the smoke collection hood (30) switches from the working state to the storage state, the driving mechanism first drives the smoke collection hood (30) to rotate around the first axis in a direction closer to the other smoke collection hood (30), and then drives the smoke collection hood (30) to move upward along the first axis.

2. The range hood according to claim 1, characterized in that, The drive mechanism includes: At least two guide rods (41), wherein the guide rods (41) are provided with external threads; The lifting drive motor (42) and the transmission assembly are provided, wherein the lifting drive motor (42) is capable of driving the guide rod (41) to rotate around its own axis through the transmission assembly; The rotating assembly (43) includes an inner ring (431) and an outer ring (432). The inner ring (431) is provided with at least two guide holes, which correspond one-to-one with the guide rod (41). The guide holes are provided with internal threads and are threadedly connected to the guide rod (41). The outer ring (432) is sleeved on the inner ring (431) and can rotate relative to the inner ring (431). The smoke hood (30) is connected to the outer ring (432). The rotation drive assembly (44) is capable of driving the outer ring (432) to rotate relative to the inner ring (431).

3. The range hood according to claim 2, characterized in that, The range hood also includes two chimneys (20), which are disposed inside the housing (10). The two chimneys (20) correspond one-to-one with the two smoke collection hoods (30). Each chimney (20) has a flue (22), and the axis of the chimney (20) is the first axis. Multiple guide rods (41) are distributed circumferentially along the chimney (20). The inner ring (431) is sleeved on the chimney (20) and is threadedly connected to the guide rods (41).

4. The range hood according to claim 3, characterized in that, The smoke hood (30) has a smoke collection chamber (32) which is connected to the flue (22); when the smoke hood (30) is in the working state, a smoke inlet (31) is provided on the lower part of the side facing the stove, which is connected to the smoke collection chamber (32).

5. The range hood according to claim 4, characterized in that, The chimney (20) is provided with a smoke inlet (21) and a smoke outlet that communicate with the flue (22). The outer ring (432) is provided with a first smoke outlet that communicates with the smoke collection chamber (32). The inner ring (431) is provided with a second smoke outlet that communicates with the smoke inlet (21). When the smoke collection hood (30) is in the working state, the first smoke outlet and the second smoke outlet are directly opposite each other.

6. The range hood according to claim 1, characterized in that, It also includes an air curtain assembly (50) that can form an air curtain extending along the length of the smoke hood (30) at the lower end of the smoke hood (30).

7. The range hood according to claim 6, characterized in that, The air curtain assembly (50) includes a fan (51) and an air outlet shell (52). An air curtain cavity (33) is provided inside the smoke hood (30). The air curtain cavity (33) is not connected to the smoke collection cavity (32) of the smoke hood (30). The smoke hood (30) is provided with a first air inlet and an outlet that communicate with the air curtain cavity (33). The outlet is located at the lower end of the smoke hood (30) and extends along the length of the smoke hood (30). The fan (51) and the air outlet shell (52) are both located inside the air curtain cavity (33). The upper end of the air outlet shell (52) is provided with a second air inlet, which is connected to the air outlet of the fan (51). The lower end of the air outlet shell (52) is provided with an air curtain outlet (521), which extends along the length of the smoke hood (30) and extends out of the smoke hood (30) through the protrusion.

8. The range hood according to claim 7, characterized in that, The air curtain outlet (521) is a long straight hole or an arc-shaped long hole distributed along the length direction of the smoke hood (30).

9. The range hood according to claim 8, characterized in that, The air curtain outlet (521) includes one or two sets of small holes (5211). When there is one set of small holes (5211), the multiple small holes (5211) in one set are distributed in an arc shape along the length direction of the smoke hood (30). When there are two sets of small holes (5211), the multiple small holes (5211) in each set are distributed in an arc shape along the length direction of the smoke hood (30), the two sets of small holes (5211) are distributed at intervals along the arc radius direction, and the two sets of small holes (5211) are staggered.

10. A control method for a range hood, characterized in that, Applied to the range hood as described in any one of claims 1-9, comprising: Turn on the stove; Start the drive mechanism. The drive mechanism first drives the smoke hood (30) to move downward a set distance along the first axis. Then the drive mechanism drives the smoke hood (30) to rotate 90 degrees around the first axis in a direction away from the other smoke hood (30). Turn off the stove; The drive mechanism is restarted. The drive mechanism first drives the smoke hood (30) to rotate 90 degrees around the first axis toward the other smoke hood (30). Then the drive mechanism drives the smoke hood (30) to move upward a set distance along the first axis.

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