Portable extractor hood

Abstract

The utility model belongs to the technical field of range hood, disclose portable range hood, portable range hood includes casing and at least two main fan, the casing is provided with air inlet and air outlet, the casing has the smoke collection cavity in, the smoke collection cavity is connected in the air inlet and the air outlet, the main fan is movably provided in the smoke collection cavity, the position of at least two main fan is adjustable respectively, to form series arrangement or parallel arrangement, the air inlet end of all main fan of parallel arrangement is all towards the air inlet, the air inlet end of one of all main fan of series arrangement is towards the air inlet. The portable range hood of the utility model, through the position of at least two main fan is adjustable respectively to form series arrangement or parallel arrangement, increase extraction and exhaust oil fume efficiency, reduce oil fume escape, and avoid because work noise increases influence user's use feeling.

Description

Technical Field

[0001] This utility model relates to the field of cooking appliance technology, and in particular to a portable range hood. Background Technology

[0002] A desktop range hood is a portable fume extraction device placed directly on a desktop. It boasts advantages such as small size, easy portability, and no installation required, making it suitable for close-range fume extraction. Existing desktop range hoods incorporate a centrifugal fan within the main unit, using its suction to draw in fumes. When the amount of fume suddenly increases or the diffusion path changes due to indoor airflow, causing fumes to escape, the centrifugal fan speed is increased to improve extraction efficiency. However, this increases several drawbacks. First, the fixed position of the centrifugal fan's air inlet cannot adapt to changes in the fume diffusion path, limiting the extraction effect of increased airflow. Second, increasing the speed significantly increases the operating noise of the desktop range hood, negatively impacting the user experience. Utility Model Content

[0003] The purpose of this utility model is to provide a portable range hood that can solve the problems of existing desktop range hoods where the centrifugal fan cannot adapt to changes in the oil fume diffusion path due to its fixed position, and the increased operating noise caused by increasing the speed to improve extraction efficiency, thus affecting the user experience.

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

[0005] A portable smoke hood is provided, including a housing and at least two main fans. The housing has an air inlet and an air outlet, and the housing has a smoke collection chamber connected to the air inlet and the air outlet. The main fans are movably installed in the smoke collection chamber. The positions of the at least two main fans are adjustable to form a series arrangement or a parallel arrangement. The air inlets of all main fans in the parallel arrangement face the air inlet, and the air inlet of one of the main fans in the series arrangement faces the air inlet.

[0006] In one embodiment, the portable smoke hood includes three main fans, which are moved such that two of the three main fans form a main fan unit arranged in series, and the other of the three main fans forms a main fan unit arranged in parallel.

[0007] In one embodiment, the portable range hood includes at least two sets of adjustment components, which correspond one-to-one with at least two main fans. The adjustment components are used to adjust the position of the main fans, and each set of adjustment components operates separately.

[0008] In one embodiment, the adjustment component includes a first adjustment mechanism and a second adjustment mechanism. The first adjustment mechanism is used to drive the main fan to move along a first direction, and the second adjustment mechanism is used to drive the main fan to move along a second direction. The first direction and the second direction extend in the same plane and are set at an angle.

[0009] In one embodiment, a limiting component is provided inside the housing. The limiting component includes multiple first guide rails and multiple second guide rails that are interconnected. The first guide rails extend along a first direction, and the second guide rails extend along a second direction. The main fan is movably connected to the limiting component and can move along the first guide rails and the second guide rails.

[0010] In one embodiment, the first adjusting mechanism includes a first adjusting screw rotatably connected to the housing, and the second adjusting mechanism includes a second adjusting screw rotatably connected to the housing. The length of the first adjusting screw extends along a first direction, and the length of the second adjusting screw extends along a second direction. The main fan is threadedly connected to the first adjusting screw and the second adjusting screw. The first adjusting screw rotates to drive the main fan to move along the first direction, and the second adjusting screw rotates to drive the main fan to move along the second direction.

[0011] In one embodiment, the main fan is provided with a slider, on which are opened a first threaded hole and a second threaded hole that are isolated from each other. The first threaded hole extends axially along a first direction, and the second threaded hole extends axially along a second direction. A first adjusting screw is threadedly connected to the first threaded hole, and a second adjusting screw is threadedly connected to the second threaded hole; and / or,

[0012] The first adjustment mechanism includes a first drive motor, and the second adjustment mechanism includes a second drive motor. The output end of the first drive motor is connected to a first adjustment screw, and the output end of the second drive motor is connected to a second adjustment screw. The first and second drive motors are movably connected to the housing. When the first drive motor is activated, the main fan drives the second adjustment screw and the second drive motor to move simultaneously along a first direction; when the second drive motor is activated, the main fan drives the first adjustment screw and the first drive motor to move simultaneously along a second direction; and / or,

[0013] Both the first and second directions extend within the same horizontal plane. Along the height direction of the housing, the first and second adjusting screws of each set of adjusting components are arranged alternately vertically, and both the first and second adjusting screws are located within the same height space. The height spaces of all adjusting components are arranged alternately.

[0014] In one embodiment, the housing includes a front panel and a rear panel disposed opposite to each other, with an air inlet located on the upper part of the front panel and an air outlet located on the lower part of the rear panel, the air inlet and air outlet being alternately arranged.

[0015] In one embodiment, the portable smoke hood also includes an auxiliary fan disposed in the smoke collection chamber, with at least two main fans disposed above the auxiliary fan, and the air outlet of the auxiliary fan facing the air outlet.

[0016] In one embodiment, the portable range hood includes a first filter and a second filter connected to the housing, the first filter being disposed at the air inlet and the second filter being disposed at the air outlet; and / or,

[0017] The portable range hood also includes a flap that is rotatably connected to the housing and located at the air inlet. The flap has a smoke-blocking state with the air inlet open and a closed state with the air inlet closed.

[0018] The beneficial effects of this utility model are:

[0019] The portable range hood provided by this utility model includes a housing and at least two main fans. The housing has an air inlet and an air outlet, and a smoke collection chamber inside the housing, which connects to the air inlet and the air outlet. The main fans are movably disposed within the smoke collection chamber. When the main fans operate, a negative pressure area is created near the air inlet, allowing cooking fumes to enter the smoke collection chamber through the air inlet and ultimately be discharged from the air outlet. The positions of the at least two main fans are adjustable to form a series or parallel arrangement. In a parallel arrangement, the air inlets of all main fans face the air inlet, while in a series arrangement, one of the main fans has its air inlet facing the air inlet. The parallel arrangement, with the air inlets of at least two main fans all facing the air inlet, provides a larger smoke intake area, reducing the risk of smoke escape, and is suitable as a fan arrangement for the normal operating state of a portable range hood. When there is a sudden increase in the amount of cooking fumes, the arrangement of the main fans can be adjusted to form a series arrangement. At least two main fans in a series arrangement create high air pressure, increasing the pressure in the negative pressure area and improving extraction efficiency. This allows a large amount of cooking fumes to quickly enter the fume collection chamber through the air inlet in a short time, reducing the risk of fume escape. When fume escape occurs or the fume diffusion path is deflected due to changes in indoor airflow, all main fans can be arranged in series and moved as a whole to an area closer to the fume diffusion path. This increases air pressure and better adapts to changes in the fume escape path, improving extraction efficiency. During the above fume extraction process, there is no need to increase the airflow speed, avoiding increased operating noise that could negatively impact the user experience. Attached Figure Description

[0020] Figure 1 This is a structural schematic diagram of the portable range hood provided in an embodiment of the present invention from a first-view perspective;

[0021] Figure 2 This is a structural schematic diagram of the portable range hood provided in an embodiment of the present invention from a second perspective;

[0022] Figure 3This is a schematic diagram of the structure of the portable range hood with a flap removal function provided in this embodiment of the utility model;

[0023] Figure 4 This is a partial structural schematic diagram of the portable smoke hood provided in this embodiment of the utility model;

[0024] Figure 5 This is a schematic diagram of the main fan and limiting assembly provided in this embodiment of the utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the regulating component for regulating the main fan provided in this embodiment of the utility model.

[0026] In the picture:

[0027] 1. Housing; 11. Air inlet; 12. Air outlet; 13. Smoke collection chamber; 14. Front panel; 15. Rear panel; 2. Main fan; 20. Main fan unit; 21. Housing; 22. Slider; 221. First threaded hole; 222. Second threaded hole; 3. Adjustment assembly; 31. First adjustment mechanism; 311. First adjustment screw; 32. Second adjustment mechanism; 321. Second adjustment screw; 4. Limiting assembly; 41. First guide rail; 42. Second guide rail; 5. Auxiliary fan; 61. First filter screen; 62. Second filter screen; 7. Flip plate. Detailed Implementation

[0028] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] In the description of this utility model, it should be noted that the terms "center," "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. They are used only for the convenience of describing this utility model 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 this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] The embodiments of this utility model 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 this utility model, and should not be construed as limiting this utility model.

[0032] like Figures 1 to 4 As shown, this embodiment first provides a portable range hood that can be placed on a table near a cookware that produces oil fumes, making it convenient to use.

[0033] The portable range hood includes a housing 1 and at least two main fans 2. The housing 1 has an air inlet 11 and an air outlet 12. The housing 1 contains a smoke collection chamber 13, which connects to the air inlet 11 and the air outlet 12. The main fans 2 are movably disposed within the smoke collection chamber 13. When the main fans 2 operate, a negative pressure area is created near the air inlet 11. Cooking fumes enter the smoke collection chamber 13 through the air inlet 11 and are finally discharged from the air outlet 12. The positions of the at least two main fans 2 are adjustable to form a series or parallel arrangement. In a parallel arrangement, the air inlets of all main fans 2 face the air inlet 11. In a series arrangement, one of the main fans 2 faces the air inlet 11. In a parallel arrangement, the air inlets of the at least two main fans 2 all face the air inlet 11. Figure 3 As shown, the large smoke inlet area reduces the risk of oil fume escape, making it suitable as the fan arrangement for the normal operation of a portable range hood. When the amount of oil fume suddenly increases, the arrangement of the main fans 2 can be adjusted to form a series arrangement. At least two main fans 2 arranged in series create high wind pressure, increasing the pressure in the negative pressure area and improving suction efficiency. This allows a large amount of oil fume to quickly enter the smoke collection chamber 13 through the air inlet 11 in a short time, reducing the risk of oil fume escape. When oil fume escape occurs or the oil fume diffusion path deviates due to changes in indoor airflow, all main fans 2 can be arranged in series and moved to an area closer to the oil fume diffusion path. This increases wind pressure and better adapts to changes in the oil fume escape path, improving the extraction effect. During the above oil fume extraction process, there is no need to increase the wind speed, avoiding increased operating noise that could affect the user experience.

[0034] In one embodiment, the portable range hood also includes a flap 7, such as Figure 1 As shown, the flap 7 is rotatably connected to the housing 1 and is disposed at the air inlet 11. The flap 7 has a smoke-blocking state with the air inlet 11 open and a closed state with the air inlet 11 closed. In the smoke-blocking state, the flap 7 is located above the air inlet 11, blocking the oil fumes and reducing the risk of oil fumes escaping upwards.

[0035] Furthermore, the portable range hood is equipped with a control module and detection sensors (not shown in the figure). One detection sensor is located on the edge of the flap 7 to detect whether oil fumes form escape routes from both ends of the flap 7. At least one additional detection sensor is located on the side of the flap 7 facing the air inlet 11 to detect the concentration and / or amount of oil fumes. The detection sensors transmit the detection signals to the control module, which adjusts the position and arrangement of the main fan 2 according to the detected oil fume status. The specific structure and working principle of the detection sensors and control module can be referenced from existing technologies, which are not the focus of this application and will not be elaborated upon in this embodiment.

[0036] In one embodiment, the portable range hood includes three main fans 2. The three main fans 2 are moved such that two of them form a main fan unit 20 arranged in series, and the remaining main fan 2 is arranged in parallel with the main fan unit 20. Figure 6 As shown, the three main fans 2 have both the large smoke intake area formed by parallel arrangement and the high wind pressure characteristics of series arrangement, which can further improve the smoke extraction efficiency.

[0037] To facilitate independent control of the position adjustment of each main fan 2 by the control module, the portable range hood includes at least two sets of adjustment components 3, with each set of adjustment components 3 corresponding to at least two main fans 2. The adjustment components 3 are used to adjust the position of the main fans 2. Each set of adjustment components 3 operates separately to control the corresponding main fan 2 to adjust its position, forming a more flexible arrangement that better adapts to changes in the shape and diffusion path of oil fumes.

[0038] Specifically, such as Figure 6 As shown, the adjustment assembly 3 includes a first adjustment mechanism 31 and a second adjustment mechanism 32. The first adjustment mechanism 31 is used to drive the main fan 2 to move along a first direction, and the second adjustment mechanism 32 is used to drive the main fan 2 to move along a second direction. The first direction and the second direction extend in the same plane and are set at an angle. In this way, the main fan 2 can be adjusted to any position within the same plane.

[0039] For example, in one embodiment, the first direction and the second direction extend in a horizontal plane, the first direction is the X direction and the second direction is the Y direction, and the X direction and the Y direction are perpendicular to each other; the height direction of the housing 1 is the Z direction.

[0040] In one embodiment, a limiting component 4 is provided inside the housing 1. The limiting component 4 includes multiple intersecting first guide rails 41 and multiple second guide rails 42. The first guide rails 41 extend along a first direction, and the second guide rails 42 extend along a second direction. The main fan 2 is movably connected to the limiting component 4, and the main fan 2 can move along the first guide rails 41 and the second guide rails 42. For example, as shown... Figure 5 and Figure 6 As shown, multiple first guide rails 41 and multiple second guide rails 42 form a grid, and the grid density can be set according to the size of the main fan 2.

[0041] The limiting component 4 includes a support frame, on which a first guide rail 41 and a second guide rail 42 are provided, and the support frame supports the main fan 2. The main fan 2 is equipped with a sliding block or pulley (not shown in the figure), which can slide along the first guide rail 41 and the second guide rail 42, thereby guiding and constraining the movement of the main fan 2 and reducing the movement resistance of the main fan 2.

[0042] In one embodiment, the first adjusting mechanism 31 includes a first adjusting screw 311 rotatably connected to the housing 1, and the second adjusting mechanism 32 includes a second adjusting screw 321 rotatably connected to the housing 1. The length of the first adjusting screw 311 extends along a first direction, and the length of the second adjusting screw 321 extends along a second direction. The main fan 2 is threadedly connected to the first adjusting screw 311 and the second adjusting screw 321. The first adjusting screw 311 rotates to drive the main fan 2 to move along the first direction, and the second adjusting screw 321 rotates to drive the main fan 2 to move along the second direction. The structure for adjusting the position of the main fan 2 by rotating the screws is relatively simple and has high positional accuracy.

[0043] A slider 22 is provided on the outer side of the casing 21 of the main fan 2. The slider 22 has a first threaded hole 221 and a second threaded hole 222 that are isolated from each other. The first threaded hole 221 extends axially along a first direction, and the second threaded hole 222 extends axially along a second direction. A first adjusting screw 311 is threaded into the first threaded hole 221, and a second adjusting screw 321 is threaded into the second threaded hole 222. The main fan 2 can be screwed together with the first adjusting screw 311 and the second adjusting screw 321 using the same slider 22. Furthermore, when the first adjusting screw 311 rotates, the main fan 2 drives the second adjusting screw 321 to move synchronously; when the second adjusting screw 321 rotates, the main fan 2 drives the first adjusting screw 311 to move synchronously. This allows the main fan 2 to move at any position along either the first or second direction, providing greater positional flexibility.

[0044] The first adjustment mechanism 31 further includes a first drive motor (not shown in the figure), and the second adjustment mechanism 32 further includes a second drive motor (not shown in the figure). The output end of the first drive motor is connected to the first adjustment screw 311, and the output end of the second drive motor is connected to the second adjustment screw 321. The first drive motor and the second drive motor are movably connected to the housing 1. When the first drive motor is activated, the main fan 2 drives the second adjustment screw 321 and the second drive motor to move simultaneously in a first direction; when the second drive motor is activated, the main fan 2 drives the first adjustment screw 311 and the first drive motor to move simultaneously in a second direction. A slide (not shown in the figure) for supporting the first drive motor and the second drive motor is provided inside the housing 1, and the first drive motor and the second drive motor are movably mounted on the slide.

[0045] In one embodiment, along the height direction of the housing 1, the first adjusting screw 311 and the second adjusting screw 321 of each set of adjusting components 3 are arranged alternately vertically, such as... Figure 6As shown. This ensures that the first threaded hole 221 and the second threaded hole 222 on the same slider 22 are isolated from each other, and the actions of the first adjusting screw 311 and the second adjusting screw 321 will not affect each other.

[0046] For the same set of adjustment components 3, the first adjustment screw 311 and the second adjustment screw 321 are both located in the same height space, and the height spaces of all adjustment components 3 are staggered. For example, as Figure 6 As shown, the portable smoke hood has three main fans 2 and three sets of adjustment components 3 (the other two sets are not shown). The first adjustment screw 311 and the second adjustment screw 321 of each set of adjustment components 3 are arranged vertically. Moreover, each set of adjustment components 3 and the other two sets of adjustment components 3 are staggered in the height space, and there is no cross arrangement in the height direction, thereby avoiding motion interference when multiple sets of adjustment components 3 operate at the same time.

[0047] The housing 1 includes a front panel 14 and a rear panel 15 arranged opposite to each other. The air inlet 11 is located on the upper part of the front panel 14, and the air outlet 12 is located on the lower part of the rear panel 15. The air inlet 11 and the air outlet 12 are staggered, which can extend the oil fume path and improve the oil fume purification effect. Moreover, the oil fume in the smoke collection chamber 13 will increase in specific gravity after condensation and has a downward trend. The position of the air outlet 12 located on the lower part of the rear panel 15 is more in line with the oil fume flow trend.

[0048] Since all main fans 2 are positioned within the horizontal plane of their corresponding air inlets 11, in order to increase the smoke extraction efficiency at the air outlet 12 and prevent oil fumes from accumulating in the smoke collection chamber 13, in one embodiment, the portable smoke hood also includes an auxiliary fan 5 disposed within the smoke collection chamber 13, such as... Figure 4 As shown. At least two main fans 2 are positioned above the auxiliary fan 5, with the outlet of the auxiliary fan 5 facing the outlet 12. Under the pressure of the auxiliary fan 5, the fumes discharged from the outlet of the main fan 2 will flow more smoothly to the outlet 12.

[0049] In one embodiment, the portable range hood includes a first filter 61 and a second filter 62 connected to the housing 1. The first filter 61 is disposed at the air inlet 11, and the second filter 62 is disposed at the air outlet 12. The first filter 61 and the second filter 62 can not only intercept large oil droplets, but also condense and liquefy high-temperature oil fumes, achieving a filtering and interception effect.

[0050] In addition, the housing 1 is equipped with an adsorption element, such as activated carbon, to adsorb oil fumes, further enhancing the oil fume filtration effect. An oil cup (not shown in the figure) is located at the bottom of the smoke collection chamber 13 to collect condensed oil droplets. The user can periodically disassemble the oil cup for cleaning. The specific structure of the adsorption element and oil cup can be designed with reference to existing technologies; details are not elaborated here.

[0051] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. 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 this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A portable extractor hood, characterised in that The device includes a housing (1) and at least two main fans (2). The housing (1) has an air inlet (11) and an air outlet (12). The housing (1) has a smoke collection chamber (13) connected to the air inlet (11) and the air outlet (12). The main fans (2) are movably disposed in the smoke collection chamber (13). The positions of the at least two main fans (2) are adjustable to form a series arrangement or a parallel arrangement. The air inlet ends of all the main fans (2) arranged in parallel face the air inlet (11). The air inlet end of one of the main fans (2) arranged in series faces the air inlet (11).

2. The portable extractor of claim 1, wherein, The portable smoke hood includes three main fans (2), and the three main fans (2) are moved so that two of the three main fans (2) form a main fan group (20) arranged in series, and the other of the three main fans (2) forms a parallel arrangement with the main fan group (20).

3. The portable smoke hood according to claim 1, characterized in that, The portable range hood includes at least two sets of adjustment components (3), and at least two sets of adjustment components (3) correspond one-to-one with at least two main fans (2). The adjustment components (3) are used to adjust the position of the main fans (2), and each set of adjustment components (3) operates separately.

4. The portable smoke hood according to claim 3, characterized in that, The adjustment component (3) includes a first adjustment mechanism (31) and a second adjustment mechanism (32). The first adjustment mechanism (31) is used to drive the main fan (2) to move along a first direction, and the second adjustment mechanism (32) is used to drive the main fan (2) to move along a second direction. The first direction and the second direction extend in the same plane and are set at an angle to each other.

5. The portable smoke hood according to claim 4, characterized in that, The housing (1) is provided with a limiting component (4), which includes multiple first guide rails (41) and multiple second guide rails (42) that are interconnected. The first guide rails (41) extend along the first direction, and the second guide rails (42) extend along the second direction. The main fan (2) is movably connected to the limiting component (4), and the main fan (2) can move along the first guide rails (41) and the second guide rails (42).

6. The portable smoke hood according to claim 4, characterized in that, The first adjustment mechanism (31) includes a first adjustment screw (311) rotatably connected to the housing (1), and the second adjustment mechanism (32) includes a second adjustment screw (321) rotatably connected to the housing (1). The length of the first adjustment screw (311) extends along the first direction, and the length of the second adjustment screw (321) extends along the second direction. The main fan (2) is threadedly connected to the first adjustment screw (311) and the second adjustment screw (321). The first adjustment screw (311) rotates to drive the main fan (2) to move along the first direction, and the second adjustment screw (321) rotates to drive the main fan (2) to move along the second direction.

7. The portable smoke hood according to claim 6, characterized in that, A slider (22) is provided outside the casing (21) of the main fan (2). The slider (22) has a first threaded hole (221) and a second threaded hole (222) that are isolated from each other. The first threaded hole (221) extends axially in a first direction, and the second threaded hole (222) extends axially in a second direction. The first adjusting screw (311) is threaded into the first threaded hole (221), and the second adjusting screw (321) is threaded into the second threaded hole (222); and / or, The first adjustment mechanism (31) further includes a first drive motor, and the second adjustment mechanism (32) further includes a second drive motor. The output end of the first drive motor is connected to the first adjustment screw (311), and the output end of the second drive motor is connected to the second adjustment screw (321). The first drive motor and the second drive motor are respectively movably connected to the housing (1). When the first drive motor is activated, the main fan (2) drives the second adjustment screw (321) and the second drive motor to move simultaneously along the first direction. When the second drive motor is activated, the main fan (2) drives the first adjusting screw (311) and the first drive motor to move simultaneously along the second direction; and / or, Both the first direction and the second direction extend in the same horizontal plane. Along the height direction of the housing (1), the first adjusting screw (311) and the second adjusting screw (321) of each set of adjusting components (3) are arranged alternately up and down, and the first adjusting screw (311) and the second adjusting screw (321) are located in the same height space. The height spaces of all the adjusting components (3) are arranged alternately.

8. The portable smoke hood according to claim 1, characterized in that, The housing (1) includes a front panel (14) and a rear panel (15) arranged opposite to each other. The air inlet (11) is located on the upper part of the front panel (14), and the air outlet (12) is located on the lower part of the rear panel (15). The air inlet (11) and the air outlet (12) are arranged alternately.

9. The portable smoke hood according to claim 8, characterized in that, The portable smoke hood also includes an auxiliary fan (5) disposed in the smoke collection chamber (13), and at least two main fans (2) are disposed above the auxiliary fan (5), with the air outlet of the auxiliary fan (5) facing the air outlet (12).

10. The portable smoke hood according to any one of claims 1-9, characterized in that, The portable range hood includes a first filter (61) and a second filter (62) connected to the housing (1), the first filter (61) being disposed at the air inlet (11), and the second filter (62) being disposed at the air outlet (12); and / or, The portable smoke hood also includes a flap (7), which is rotatably connected to the housing (1) and located at the air inlet (11). The flap (7) has a smoke-blocking state with the air inlet (11) open and a closed state with the air inlet (11) closed.

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