Range hood and control method thereof

Abstract

This application discloses a range hood and a control method thereof. The range hood includes: a range hood body having an air outlet; a fan mounted on the range hood body; a wind pressure sensor mounted at the air outlet for real-time acquisition of current fan back pressure; a hydraulic damper fixedly connected to the fan for generating a damping force to offset fan vibration; a linear motor fixedly connected to the hydraulic damper and the fan for adjusting the magnitude of the damping force; and a controller electrically connected to the wind pressure sensor and the linear motor. The controller controls the operating state of the linear motor based on the current fan back pressure and a current fan speed level signal input by a user. The range hood in the embodiments of this application achieves fan noise reduction by reducing fan vibration.

Description

Technical Field

[0001] The present application relates to the technical field of range hood noise reduction, and in particular to a range hood and a control method thereof. Background Art

[0002] In recent years, the domestic range hood market has been focused on high air volume and high suction. As range hood air volume increases, the noise generated has also grown. This can easily cause users to lose the ability to hear conversations, phone calls, doorbells, and children's voices, and can even cause irritability, headaches, and heart palpitations. Long-term use can have serious consequences for physical and mental health. Specifically, as range hood air volume and static pressure increase, fan power increases, increasing fan vibration. The resulting high vibration noise is becoming an increasingly prominent issue, making noise a pressing technical issue with existing range hoods. Summary of the Invention

[0003] In view of the shortcomings of the existing methods, the present application provides a range hood and a control method thereof, so as to solve the technical problem of high noise of the range hood in the prior art.

[0004] In the first aspect, an embodiment of the present application provides a range hood, comprising: a range hood main body having an air outlet; a fan, arranged on the range hood main body; a wind pressure sensor, arranged at the air outlet, for collecting the current fan back pressure in real time; a hydraulic damper, fixedly connected to the fan, for generating a damping force to offset the vibration of the fan; a linear motor, respectively fixedly connected to the hydraulic damper and the fan, for adjusting the magnitude of the damping force; a controller, respectively electrically connected to the wind pressure sensor and the linear motor; wherein the controller controls the working state of the linear motor according to the current fan back pressure and the current fan speed gear signal input by the user.

[0005] As an optional implementation, the hydraulic damper includes: a base fixedly connected to the fan; and an adjusting cap sleeved on the base to form a hydraulic chamber between the base and the adjusting cap.

[0006] As an optional embodiment, the linear motor includes: a mover, which is a rod-shaped structure fixed to the side of the adjustment cap away from the base. The mover moves along its own axis and drives the adjustment cap to move to adjust the volume of the hydraulic chamber.

[0007] As an optional implementation, the fan includes a rotating shaft; the mover is arranged parallel to the rotating shaft, so that the hydraulic damper generates a damping force opposite to the movement direction of the mover.

[0008] As an optional implementation, the range hood further includes: a fan frame, fixedly connected to one side of the fan; and a rod sleeve, which is sleeved on the outer side of the mover and connected to the fan frame.

[0009] As an optional embodiment, the base includes a cylinder; the fan includes a fan body and a connecting portion protruding from the outside of the fan body, and the connecting portion is provided with a connecting through hole that cooperates with the cylinder.

[0010] As an optional embodiment, the base further includes: a first limiting portion and a second limiting portion, which are respectively arranged at opposite ends of the cylinder and protrude circumferentially from the cylinder; wherein at least a portion of the cylinder is arranged in the connecting through hole.

[0011] As an optional embodiment, the adjusting cap includes a shell and an opening provided on the shell; wherein the first limiting portion is disposed in the shell through the opening and forms the sealed hydraulic cavity with the shell.

[0012] As an optional implementation manner, the range hood includes a plurality of the hydraulic dampers, and the plurality of the hydraulic dampers are evenly distributed on the fan.

[0013] In the second aspect, an embodiment of the present application provides a control method for a range hood as described in any one of the first aspect of the embodiments of the present application, including: determining the current speed of the fan according to the current fan gear input by the user; collecting the current fan back pressure in real time through the wind pressure sensor; according to the current speed and the current fan back pressure, searching for the current working current and the current mover push-out frequency corresponding to the current speed and the current fan back pressure in the pre-stored correspondence between the speed, fan back pressure, working current and mover push-out frequency; controlling the linear motor to reach the previous working current and the current mover push-out frequency.

[0014] The present application provides a range hood and a control method thereof. The technical solutions provided by the embodiments of the present application bring at least the following beneficial effects:

[0015] Through the range hood provided by this application, the current speed of the fan is determined by the current fan gear signal input by the user, and the current fan back pressure is determined by the wind pressure sensor. The current working current and the current actuator thrust frequency of the linear motor are determined according to the current speed and the current fan back pressure to control the working state of the linear motor. Through the cooperation of the linear motor and the hydraulic damper, a damping force corresponding to the current vibration state of the fan is generated to hinder the vibration of the fan, reduce the fan vibration reduction noise, and achieve the purpose of noise reduction.

[0016] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic structural diagram of a range hood provided in an embodiment of the present application;

[0019] Figure 2 A schematic diagram of the connection relationship between a fan, a hydraulic damper, a volute, a linear motor, and a fan frame in a range hood provided in an embodiment of the present application;

[0020] Figure 3 A schematic diagram of the connection relationship between a hydraulic damper, a linear motor, and a rod sleeve in a range hood provided in an embodiment of the present application;

[0021] Figure 4 for Figure 3 sectional view of

[0022] Figure 5 A schematic diagram of the connection relationship between a fan, a hydraulic damper, a linear motor, and a fan frame in a range hood provided in an embodiment of the present application;

[0023] Figure 6 A schematic diagram of the connection relationship between a fan, a hydraulic damper, a linear motor, a fan frame, and a rod sleeve in a range hood provided in an embodiment of the present application;

[0024] Figure 7 A flow chart of a range hood control method provided in an embodiment of the present application.

[0025] Reference numerals and corresponding descriptions

[0026] 1: Range hood body; 11: Air outlet; 12: Volute;

[0027] 2: fan; 21: rotating shaft; 22: fan body; 23: connecting part; 24: connecting through hole;

[0028] 3: Hydraulic damper; 31: Base; 311: Cylinder; 312: First limiting portion; 313: Second limiting portion; 32: Adjusting cap; 33: Hydraulic chamber;

[0029] 4: linear motor; 41: mover; 42: stator;

[0030] 5: Wind rack;

[0031] 6: Rod cover. DETAILED DESCRIPTION

[0032] The present application is described in detail below. Examples of embodiments of the present application are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar components or components having the same or similar functions. In addition, if the detailed description of the known technology is not necessary for the features of the present application shown, it will be omitted. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0033] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with their meanings in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0034] Those skilled in the art will understand that, unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include the plural forms. It should be further understood that the wording "comprising" used in the specification of the present application refers to the presence of the features, elements and / or components, but does not exclude the presence or addition of one or more other features, elements, components and / or groups thereof. It should be understood that when we say that an element is "connected" to another element, it can be directly connected to the other element, or there may be an intermediate element. The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments.

[0035] like Figure 1-2As shown, an embodiment of the present application provides a range hood, which mainly includes a range hood body 1, a fan 2, a wind pressure sensor (not shown in the figure), a hydraulic damper 3, a linear motor 4 and a controller (not shown in the figure). The range hood body 1 has an air outlet 11; the fan 2 is arranged on the range hood body 1; the wind pressure sensor is arranged at the air outlet 11, which is used to collect the current fan back pressure in real time; the hydraulic damper 3 is fixed to the fan 2, which is used to generate a damping force to offset the vibration of the fan 2; the linear motor 4 is respectively fixed to the hydraulic damper 3 and the fan 2, which is used to adjust the magnitude of the damping force; the controller is respectively electrically connected to the wind pressure sensor and the linear motor 4; wherein the controller controls the working state of the linear motor 4 according to the current fan back pressure and the current fan speed gear signal input by the user.

[0036] In one possible embodiment, a volute 12 is installed in the range hood body 1, and a fan 2 is installed in the volute 12. An air outlet 11 is provided at the top of the volute 12. The volute 12 is provided with an air inlet side, and the hydraulic damper 3 and the linear motor 4 are both installed on the side of the volute 12 away from the air inlet side. The user can adjust the current air volume of the range hood through the control buttons or control knobs provided on the operation panel of the range hood; for example, the range hood has first, second, third and stir-fry gears with increasing air volume in sequence. The greater the air volume, the faster the speed of the fan 2 and the greater the vibration noise generated. The controller (e.g., a single-chip microcomputer) receives the current fan speed gear signal adjusted (or input) by the user, and determines the current speed corresponding to the current fan speed gear signal in the pre-stored correspondence between the fan speed gear and the speed. The fan back pressure can represent the smoke exhaust capacity of the range hood. When the smoke exhaust capacity is weak, it will cause smoke blockage, which will increase the vibration noise of fan 2. Therefore, the controller collects the current fan back pressure in real time through the wind pressure sensor.

[0037] Based on the determined current speed and current fan back pressure, the current operating current and current mover push-out frequency corresponding to the current speed and current fan back pressure are searched in the pre-stored correspondences among speed, fan back pressure, operating current, and mover push-out frequency. Linear motor 4 is controlled to reach the operating state corresponding to the previous operating current and current mover push-out frequency, thereby generating a damping force corresponding to the current vibration of fan 2 and opposite to the vibration direction of fan 2 to offset the vibration of fan 2 itself, thereby reducing or even eliminating vibration noise. The greater the current operating current, the greater the force exerted by linear motor mover 41, and the greater the damping force generated. The pre-stored correspondences among speed, fan back pressure, operating current, and mover push-out frequency can be obtained through multiple experiments during the range hood testing phase and pre-stored in the controller's database.

[0038] Optionally, the mover pushing frequency is greater than or equal to 1 time per second and less than or equal to 1000 times per second.

[0039] Through the range hood provided by this application, the current speed of the fan 2 is determined by the current fan gear signal input by the user, and the current fan back pressure is determined by the wind pressure sensor. According to the current speed and the current fan back pressure, the current working current and the current mover push-out frequency of the linear motor 4 are determined to control the working state of the linear motor 4. Through the cooperation of the linear motor 4 and the hydraulic damper 3, a damping force corresponding to the current vibration state of the fan 2 is generated to hinder the vibration of the fan 2, reduce the vibration noise of the fan 2, and achieve the purpose of noise reduction.

[0040] As an optional implementation, if it is determined that the fan 2 speed gear signal input by the user has changed, the working state of the linear motor 4 is re-controlled according to the latest user-input fan 2 speed gear signal and the current fan back pressure to achieve vibration reduction and noise reduction.

[0041] like Figure 3-4 As shown, as an optional embodiment, the hydraulic damper 3 includes a base 31 and an adjustment cap 32. The base 31 is fixedly connected to the fan 2, and the adjustment cap 32 is sleeved on the base 31 to form a hydraulic chamber 33 between the base 31 and the adjustment cap 32.

[0042] Based on the foregoing embodiments, a possible embodiment is provided, in which the base 31 is fixed on the fan 2, and the adjusting cap 32 can be sleeved on the side of the base 31 away from the fan 2, that is, the side away from the air inlet side. The adjusting cap 32 can move along the base 31 and form a hydraulic chamber 33 between the base 31 and the adjusting cap 32. The hydraulic chamber 33 contains hydraulic liquid, and a damping force for vibration reduction is generated by changing the volume of the hydraulic chamber 33.

[0043] like Figure 3-4 As shown, as an optional embodiment, the linear motor 4 includes a mover 41, which is a rod-shaped structure and is fixed to the side of the adjusting cap 32 away from the base 31. The mover 41 moves along its own axial direction and drives the adjusting cap 32 to move to adjust the volume of the hydraulic chamber 33.

[0044] Based on the above embodiment, a possible embodiment is provided in which the linear motor 4 further includes a stator 42 having a through hole and a sleeve-like structure, and is sleeved outside the mover 41. Based on the current operating current determined by the controller, the linear motor 4 drives the mover 41 to move along its own axial direction, synchronously driving the adjustment cap 32 to move closer to the base 31, thereby adjusting the relative position of the adjustment cap 32 and the base 31. Furthermore, by changing the volume of the hydraulic chamber 33, the damping force generated by the hydraulic damper 3 is adjusted.

[0045] like Figure 5As shown, as an optional embodiment, the fan 2 includes a rotating shaft 21; the mover 41 is arranged parallel to the rotating shaft 21, so that the hydraulic damper 3 generates a damping force opposite to the movement direction of the mover 41.

[0046] Based on the above embodiments, a possible embodiment is provided. When the range hood is in operation, the rotating shaft 21 of the fan 2 and the mover 41 are both arranged horizontally. The mover 41 can move horizontally, i.e., axially, to adjust the damping force in the horizontal direction. For example, when the mover 41 moves axially toward the hydraulic damper 3, the hydraulic damper 3 generates a damping force axially away from the hydraulic damper 3.

[0047] like Figure 3-6 As shown, as an optional embodiment, the range hood further includes a fan frame 5 and a rod sleeve 6. The fan frame 5 is fixed to one side of the fan 2; the rod sleeve 6 is sleeved on the outside of the mover 41 and connected to the fan frame 5.

[0048] Based on the aforementioned embodiments, a possible embodiment is provided. The fan frame 5 is a long, plate-like structure, fixedly connected to the side of the fan 2 away from the air inlet side. When the range hood is in operation, the fan frame 5 can be arranged vertically and overlap with the horizontal projection of the hydraulic damper 3, so that the mover 41 can pass through the fan frame 5 and connect to the hydraulic damper 3 of the fan 2. A rod sleeve 6 is provided at the connection between the mover 41 and the fan frame 5. The axial direction of the rod sleeve 6 overlaps with the axial direction of the mover 41, thereby fixing the mover 41. When the fan 2 vibrates, the mover 41 is guided to move along its own axial direction, thereby ensuring the generation of a damping force along the axial direction of the mover 41 and improving the vibration and noise reduction effects.

[0049] like Figure 5-6 As shown, as an optional embodiment, the base 31 includes a cylinder 311; the fan 2 includes a fan body 22 and a connecting portion 23 formed to protrude from the outside of the fan body 22, and a connecting through hole 24 is provided on the connecting portion 23 to cooperate with the cylinder 311.

[0050] Based on the above embodiment, a possible embodiment is provided in which the fan body 22 is a cylindrical structure, and the connecting portions 23 are evenly arranged along the outer circumference of the fan body 22. That is, the connecting portions 23 are radially arranged in the direction of the fan body 22 and protrude from the fan body 22 in a direction away from the fan body 22. The axial direction of the connecting through-hole 24 is parallel to the axial direction of the mover 41. Optionally, the connecting through-hole 24 is a circular through-hole, and the cylinder 311 included in the base 31 can pass through the connecting through-hole 24 to achieve connection.

[0051] like Figure 4As shown, as an optional embodiment, the base 31 also includes a first limiting portion 312 and a second limiting portion 313, and the first limiting portion 312 and the second limiting portion 313 are respectively arranged at opposite ends of the cylinder 311 and protrude circumferentially from the cylinder 311; wherein, at least part of the cylinder 311 is arranged in the connecting through hole 24.

[0052] Based on the foregoing embodiments, a possible embodiment is provided, wherein at least a portion of the cylinder 311 is located in the connecting through hole 24, wherein the axial direction of the cylinder 311 is parallel to the axial direction of the connecting through hole 24; the first limiting portion 312 is arranged close to the adjusting cap 32, and there is a gap between the first limiting portion 312 and the connecting portion 23, and the distance of the gap in the axial direction of the cylinder 311 is the maximum distance that the adjusting cap 32 moves in the direction close to the connecting portion 23.

[0053] As an optional embodiment, the adjustment cap 32 includes a shell and an opening provided on the shell; wherein the first limiting portion 312 is provided in the shell through the opening and forms a sealed hydraulic chamber 33 with the shell.

[0054] Based on the above embodiment, a possible embodiment is provided in which the housing wall of the adjusting cap 32 encloses a cavity, which is disposed toward the base 31 through an opening in the housing. A first stopper 312 extends into the cavity through the opening. The side of the first stopper 312 away from the connecting portion 23 encloses the housing wall to form a sealed hydraulic chamber 33.

[0055] As an optional implementation, the range hood includes a plurality of hydraulic dampers 3 , and the plurality of hydraulic dampers 3 are evenly distributed on the fan 2 .

[0056] Based on the above embodiments, a possible embodiment is provided in which a fan body 22 is evenly distributed with multiple connection portions 23 along its circumference, each of which is provided with a hydraulic damper 3. A fan frame 5 is provided on the fan 2 corresponding to the multiple connection portions 23, so that each hydraulic damper 3 is fixedly connected to a DC motor. The damping force generated by the evenly distributed multiple hydraulic dampers 3 acts evenly on the fan 2, avoiding damping force concentration and improving the efficiency of vibration and noise reduction.

[0057] In one possible embodiment, the vibration generated by the fan 2 during rotation is transmitted to the rod sleeve 6 or the mover 41 through the fan frame 5 or the fan 2 itself. The rod sleeve 6 or the mover 41 uses its own hardness to absorb part of the vibration. For the vibration along the axial direction of the mover 41, the mover 41 moves in the direction close to the hydraulic damper 3 to push the adjustment cap 32 to move, so as to "compress" the hydraulic chamber 33, thereby generating a damping force and a vibration reduction force (thrust of the mover 41) along the axial direction of the mover 41 to eliminate the vibration along the axial direction of the mover 41, thereby reducing the vibration of the fan 2 and reducing vibration noise.

[0058] In one possible embodiment, when the fan 2 of the range hood is in a state of low current speed, the vibration noise is low, and the user can exit the noise reduction mode in the aforementioned embodiment through the corresponding function key on the operation panel of the range hood. After exiting the noise reduction mode, the range hood can operate normally.

[0059] like Figure 7 As shown, based on the same inventive concept, the embodiment of the present application provides a control method for the range hood of any one of the aforementioned embodiments of the present application, mainly comprising steps S1-S4:

[0060] Step S1: Determine the current rotation speed of the fan 2 according to the current fan gear input by the user.

[0061] Step S2: The current fan back pressure is collected in real time through the wind pressure sensor.

[0062] Step S3: According to the current speed and the current fan back pressure, the current working current and the current mover push-out frequency corresponding to the current speed and the current fan back pressure are searched in the pre-stored corresponding relationship among speed, fan back pressure, working current and mover push-out frequency.

[0063] Step S4: Control the linear motor 4 to reach the previous working current and the current mover pushing frequency.

[0064] The specific process of the range hood control method and the structure of implementing the corresponding steps have been described in the aforementioned embodiments and will not be repeated here.

[0065] Through the control method of the range hood provided by the present application, through the range hood provided by the present application, the current speed of the fan 2 is determined by the current fan gear signal input by the user, and the current fan back pressure is determined by the wind pressure sensor, and the current working current and the current mover push-out frequency of the linear motor 4 are determined according to the current speed and the current fan back pressure to control the working state of the linear motor 4. Through the cooperation of the linear motor 4 and the hydraulic damper 3, a damping force corresponding to the current vibration state of the fan 2 is generated to hinder the vibration of the fan 2, reduce the vibration reduction noise of the fan 2, and achieve the purpose of noise reduction.

[0066] It should be understood that although Figure 7 The steps in the flowchart are shown in the order indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. In addition, Figure 7At least part of the steps may include multiple steps or multiple stages. These steps or stages are not necessarily performed at the same time, but can be performed at different times. The order of execution of these steps or stages is not necessarily one by one, but can be performed in turn or alternately with other steps or at least part of the steps or stages in other steps.

[0067] It can be understood that the same / similar parts between the various embodiments of the above method in this specification can be referred to each other, and each embodiment focuses on the differences from other embodiments. For related parts, please refer to the description of other method embodiments.

[0068] Those skilled in the art will appreciate that the steps, measures, and schemes in the various operations, methods, and processes discussed in this application may be interchanged, modified, combined, or deleted. Furthermore, other steps, measures, and schemes in the various operations, methods, and processes discussed in this application may also be interchanged, modified, rearranged, decomposed, combined, or deleted. Furthermore, steps, measures, and schemes in the prior art that are similar to those disclosed in this application may also be interchanged, modified, rearranged, decomposed, combined, or deleted.

[0069] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0070] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0071] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0072] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0073] The above description is only part of the implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A range hood, characterized in that: include: A range hood body (1) having an air outlet (11); A fan (2) is provided on the range hood body (1); the fan (2) comprises a rotating shaft (21), a fan body (22), and a connecting portion (23) formed protruding from the outside of the fan body (22); the connecting portion (23) is provided with a connecting through hole (24) that cooperates with the cylinder (311). A wind pressure sensor is provided at the air outlet (11) and is used to collect the current fan back pressure in real time; A hydraulic damper (3) is fixedly connected to the fan (2) and is used to generate a damping force to offset the vibration of the fan (2); the hydraulic damper (3) includes a base (31) and an adjustment cap (32); the base (31) is fixedly connected to the fan (2); the base (31) includes the cylinder (311), a first limiting portion (312) and a second limiting portion (313); the first limiting portion (312) and the second limiting portion (313) are respectively arranged at opposite ends of the cylinder (311) , and circumferentially protrudes from the cylinder (311); at least a portion of the cylinder (311) is disposed in the connecting through hole (24); the adjusting cap (32) is sleeved on the base (31) to form a hydraulic chamber (33) between the base (31) and the adjusting cap (32); the adjusting cap (32) includes a shell and an opening provided on the shell; the first limiting portion (312) is disposed in the shell through the opening and encloses the shell to form the sealed hydraulic chamber (33); A linear motor (4) is fixedly connected to the hydraulic damper (3) and the fan (2), respectively. The linear motor (4) adjusts the magnitude of the damping force by controlling the movement frequency of the mover (41); the mover (41) is a rod-shaped structure, fixedly connected to the side of the adjustment cap (32) away from the base (31), and the mover (41) moves along its own axial direction and drives the adjustment cap (32) to move, so as to adjust the volume of the hydraulic chamber (33); the mover (41) is arranged parallel to the rotating shaft (21), so that the hydraulic damper (3) generates a damping force opposite to the movement direction of the mover (41); A controller is electrically connected to the wind pressure sensor and the linear motor (4), respectively; the controller controls the working state of the linear motor (4) according to the current fan back pressure and the current fan speed gear signal input by the user.

2. The range hood according to claim 1, characterized in that: Also includes: A fan frame (5) is fixedly connected to one side of the fan (2); A rod sleeve (6), the rod sleeve (6) is sleeved on the outside of the mover (41) and connected to the fan frame (5).

3. The range hood according to claim 1, characterized in that: It comprises a plurality of hydraulic dampers (3), and the plurality of hydraulic dampers (3) are evenly distributed on the fan (2).

4. A control method for a range hood according to any one of claims 1 to 3, characterized in that: include: Determining the current speed of the fan (2) according to the current fan gear input by the user; The current fan back pressure is collected in real time by the wind pressure sensor; According to the current speed and the current fan back pressure, searching for the current working current and the current mover push-out frequency corresponding to the current speed and the current fan back pressure in the pre-stored corresponding relationship among the speed, the fan back pressure, the working current and the mover (41) push-out frequency; The linear motor (4) is controlled to reach the previous working current and the current mover pushing frequency.

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