A range hood

Abstract

The application discloses a range hood, comprising a fan frame and a fan system arranged in the fan frame, characterized in that: the fan frame comprises a frame structure, the frame structure comprises a first frame body and a second frame body, the first frame body and the second frame body are arranged front and back so as to be capable of moving relatively in the front and back direction to change the depth of the fan frame, or the first frame body and the second frame body are arranged left and right so as to be capable of moving relatively in the left and right direction to change the width of the fan frame; the axis of the fan system extends transversely and is capable of rotating around the axis extending in the vertical direction to match the size of the fan frame. Compared with the prior art, the application has the advantages that: by arranging the rotatable fan system, the corresponding reversing adjustment can be carried out based on different depths or widths of the hanging cabinet during the installation at home, and the adaptability to the hanging cabinet is improved.

Description

Technical Field

[0001] This invention relates to an oil fume purification device, and more particularly to an oil fume extractor. Background Technology

[0002] Range hoods have become an indispensable kitchen appliance in modern homes. They operate on the principles of fluid dynamics, using a centrifugal fan inside to draw in cooking fumes and a filter to remove some grease particles. The centrifugal fan consists of a casing, an impeller housed within the casing, and a motor that drives the impeller. As the impeller rotates, a negative pressure is generated at the center of the fan, drawing in the cooking fumes from below. After being accelerated by the fan, the fumes are collected by the casing and guided outdoors.

[0003] The kitchen area of ​​Chinese families is generally between 4 and 10 square meters. Due to space limitations, they often install wall cabinets. The depth of these wall cabinets ranges from 300mm to 400mm, which restricts the depth of the range hood's fan bracket. The depth of the fan bracket directly limits the thickness or width of the fan, thus limiting the range hood's performance. Similarly, the width of the wall cabinets, also between 300mm and 400mm, restricts the width of the range hood's fan bracket.

[0004] Currently, due to the size limitations of wall-mounted cabinets, there are two ways to place fans in limited spaces:

[0005] One type is horizontal, where the fan system has front and rear air intakes. This effectively increases the width of the fan and is suitable for shallower wall cabinets. Increasing the fan width can improve fan performance, including maximum airflow and maximum air pressure. For example, Chinese Patent Application No. 201921440435.2 discloses a range hood that includes a housing and a fan system disposed within the housing. The fan system is a dual-inlet fan system, with the main air inlet facing forward and the auxiliary air inlet facing rearward.

[0006] This arrangement causes the fan inlet to face the user directly, resulting in direct sound transmission and high noise levels during use. Furthermore, the width of the fan system is often limited by the wall-mounted cabinet, requiring a wider cabinet to accommodate it.

[0007] Another type is the vertical arrangement, where the fan system draws air from the left and right, so that the air inlet faces the user, which can effectively reduce noise during use. For example, Chinese Patent Application No. 201811014418.2 discloses a fan box structure, which includes a box body and an air inlet assembly. The air inlet assembly is vertically arranged inside the box body, changing the traditional front and rear air inlet to left and right air inlet, with the two air inlets corresponding to the two burners of the stove.

[0008] In this layout, the width of the fan system is limited by the wall cabinet, often requiring a deeper wall cabinet to fit. Furthermore, it is difficult to upgrade the fan system using traditional technology, and the air volume and air pressure are often inferior to those of a horizontally placed range hood.

[0009] Currently, both horizontal and vertical fan configurations use fixed fan frames and systems. Even with adjustments, only angular adjustments in a single direction are possible, and they cannot be adapted to wall-mounted cabinets. Furthermore, the air intake duct is not designed to match the fan layout, which can easily create vortices within the duct, reducing the air intake area and weakening the range hood's performance. Therefore, further improvements are needed. Summary of the Invention

[0010] The technical problem to be solved by the present invention is to address the shortcomings of the prior art by providing a range hood that can be adjusted accordingly based on different wall cabinet sizes, thereby improving its compatibility with wall cabinets.

[0011] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: a range hood, comprising a fan frame and a fan system disposed within the fan frame, characterized in that:

[0012] The wind turbine frame includes a frame structure, which includes a first frame and a second frame. The first frame and the second frame are arranged front to back so that they can move relative to each other in the front-back direction to change the depth of the wind turbine frame, or the first frame and the second frame are arranged left to right so that they can move relative to each other in the left-right direction to change the width of the wind turbine frame.

[0013] The axis of the wind turbine system extends laterally and can rotate about a vertically extending axis to match the dimensions of the wind turbine frame.

[0014] To facilitate the adaptation of the air outlet plate assembly of the fan frame to the rotating fan system and prevent pressure leakage of the fan frame, the fan frame also includes an air outlet plate assembly disposed at the upper end of the frame structure. The air outlet plate assembly includes a first air outlet plate fixed to the first frame and a second air outlet plate fixed to and linked with the fan system. The first air outlet plate has a first air outlet, and the second air outlet plate has a second air outlet. When the second air outlet plate rotates to different desired states, the second air outlet corresponds to the first air outlet. The second air outlet corresponds to the air outlet of the fan system. The air outlet plate assembly also includes a movable plate for filling the gaps other than the second air outlet. The gaps are openings formed at the upper end of the frame structure to allow fluid communication between the inside and top of the fan frame.

[0015] According to one aspect of the invention, the movable plate is a plate that can fill the gap after the state of the fan system changes.

[0016] According to another aspect of the invention, the movable plate is a plate that is stacked above and below the first air outlet plate and the second air outlet plate and is rotatable about an axis extending in a vertical direction.

[0017] A baffle is provided at the upper end of the frame structure. The baffle is located at the front end of the frame structure and is stacked on top of the air outlet plate assembly.

[0018] The range hood also includes a first motion mechanism disposed on the first air outlet plate, the first motion mechanism driving the second air outlet plate and the fan system to rotate on a fixed axis.

[0019] According to one aspect of the invention, to facilitate the formation of an adjustable-depth wind turbine frame, the first frame includes a rear cover plate, a first side plate, and a second side plate, the first side plate extending forward from the left end of the rear cover plate, and the second side plate extending forward from the right end of the rear cover plate; the second frame includes a first adjusting plate, a second adjusting plate, and a front cover plate, the first adjusting plate and the first side plate extending in the same direction and at least partially located in front of the first side plate, the first side plate and the first adjusting plate always maintaining at least partial overlap in the front-rear direction, the second adjusting plate and the second side plate extending in the same direction and at least partially located in front of the second side plate, the second side plate and the second adjusting plate always maintaining at least partial overlap in the front-rear direction, and the front cover plate covering the front ends of the first adjusting plate and the second adjusting plate.

[0020] To facilitate adjustment of the frame structure of the drive fan, the front end of the first frame is inserted into the rear end of the second frame; the range hood also includes a second motion mechanism for driving the relative movement of the first frame and the second frame, the second motion mechanism including a first drive mechanism, the first drive mechanism being a linear drive module, and the first drive mechanism being connected to the first frame in a transmission manner.

[0021] To facilitate the relative movement of the first frame and the second frame, the second motion mechanism further includes a transmission rod and a first slide rail assembly. The transmission rod is located at the output end of the first drive mechanism and extends in the left-right direction. The first slide rail assembly has two sets, each set including a slidingly engaged first slide rail and a second slide rail. The first slide rail is fixed to the side of the first side plate and the second side plate facing the inside of the fan frame, respectively. The second slide rail is fixed to the side of the first adjusting plate and the second adjusting plate facing the inside of the fan frame, respectively. The left and right ends of the transmission rod are respectively connected to the first slide rail at the corresponding positions.

[0022] According to another aspect of the present invention, to facilitate the formation of a fan frame with adjustable left and right width dimensions, the frame structure includes a rear cover plate, a first side plate, a second side plate, and a front cover plate spaced apart on the front side of the rear cover plate. The first side plate is located between the left sides of the rear cover plate and the front cover plate, and the second side plate is located between the right sides of the rear cover plate and the front cover plate. The fan frame further includes an air outlet plate assembly disposed at the upper end of the frame structure. The upper end of the first side plate is bent toward the direction of the second side plate to form a first upper bend. The front and rear ends of the first side plate are respectively bent toward the direction of the second side plate. The second side panel is bent in the direction of the first side panel to form a first side bend. The upper end of the second side panel is bent in the direction of the first side panel to form a second upper bend. The front and rear ends of the second side panel are bent in the direction of the first side panel to form second side bends. The first side panel and each bend constitute a first frame. The second side panel and each bend constitute a second frame. Each upper bend can be hidden or exposed in the air outlet panel assembly. Each side bend at the front end can be hidden or exposed in the front cover. Each side bend at the rear end can be hidden or exposed in the rear cover.

[0023] To facilitate the adjustment of the frame structure of the drive fan, the range hood also includes a fifth motion mechanism for driving the first side plate and the second side plate to move left and right in opposite directions.

[0024] Preferably, to facilitate the movement of the first and second frames, the fifth motion mechanism includes a second drive mechanism, a first connecting rod, a second connecting rod, and a second slide rail assembly. The second drive mechanism is a linear drive module. There are two first connecting rods and two second connecting rods, arranged side by side with intervals. Each second connecting rod extends in the front-rear direction. Each second connecting rod is connected to a second sliding assembly at its front and rear ends. The second sliding assembly on the left front end slides the front cover plate and the first side plate together. The second sliding assembly on the right front end slides the front cover plate and the second side plate together. The second sliding assembly on the left rear end slides the rear cover plate and the first side plate together. The second sliding assembly on the right rear end slides the rear cover plate and the second side plate together.

[0025] To facilitate increasing the effective area of ​​the flow channel and to adapt to a smoother flow channel for the fan system, a guide plate is also provided below the fan system. The guide plate is convex downward in shape and rotates around an axis extending in the vertical direction, thereby guiding the oil fumes to the air inlet of the fan system.

[0026] To facilitate the rotation of the guide plate, an air intake assembly is provided below the fan frame, and the guide plate is disposed within the air intake assembly; the range hood also includes a third motion mechanism for driving the guide plate to rotate around an axis extending in the vertical direction, and the third motion mechanism is fixedly disposed within the air intake assembly by a bracket.

[0027] Compared with the prior art, the advantages of the present invention are as follows: by setting a rotatable fan system, it is easy to make corresponding reversing adjustments based on different wall cabinet depths or widths during installation, thereby improving the compatibility with the wall cabinet; by setting the movable plate of the air outlet plate assembly, pressure leakage after the fan frame is adjusted can be avoided; by setting the guide plate, the effective area of ​​the flow channel can be increased and a smoother flow channel can be adapted to the fan system. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of a range hood according to the first embodiment of the present invention;

[0029] Figure 2 This is a cross-sectional view (fan horizontally positioned) of the range hood according to the first embodiment of the present invention;

[0030] Figure 3 This is an exploded structural diagram of the concealed air intake component of the range hood according to the first embodiment of the present invention;

[0031] Figure 4 This is an exploded structural diagram of the air outlet plate assembly and its motion mechanism of the range hood according to the first embodiment of the present invention.

[0032] Figure 5 This is an exploded structural diagram of the front cover of the range hood with hidden fan frame according to the first embodiment of the present invention;

[0033] Figure 6 for Figure 5 A further breakdown diagram;

[0034] Figure 7 This is a schematic diagram of the concealed air intake assembly of the range hood according to the first embodiment of the present invention (fan vertically positioned);

[0035] Figure 8 for Figure 7 A sectional view;

[0036] Figure 9 This is a cross-sectional view (fan horizontally positioned) of a range hood according to the second embodiment of the present invention;

[0037] Figure 10 This is a cross-sectional view (fan positioned longitudinally) of a range hood according to the second embodiment of the present invention;

[0038] Figure 11 This is a schematic diagram of the guide plate and its motion mechanism of the range hood according to the second embodiment of the present invention;

[0039] Figure 12 This is a schematic diagram of a range hood according to the third embodiment of the present invention (with the fan horizontally positioned);

[0040] Figure 13 for Figure 12 A schematic diagram of the exploded structure of the fan frame of a range hood;

[0041] Figure 14 for Figure 12 An exploded structural diagram of the air outlet plate assembly and its motion mechanism of the fan frame of a range hood.

[0042] Figure 15 This is a schematic diagram of a range hood according to the third embodiment of the present invention (fan arranged vertically);

[0043] Figure 16 for Figure 15 A schematic diagram of the fan frame of a range hood;

[0044] Figure 17 This is a schematic diagram of a range hood according to the fourth embodiment of the present invention (with the fan horizontally positioned);

[0045] Figure 18 for Figure 17 A cross-sectional view of a range hood;

[0046] Figure 19 for Figure 17 A schematic diagram of a range hood with a concealed air intake component;

[0047] Figure 20 for Figure 19 A schematic diagram of the decomposed structure;

[0048] Figure 21 for Figure 19 A schematic diagram of the fifth motion mechanism;

[0049] Figure 22 This is a schematic diagram of a range hood according to the fourth embodiment of the present invention (fan arranged vertically);

[0050] Figure 23 for Figure 22 A schematic diagram of a range hood with a concealed air intake component. Detailed Implementation

[0051] The embodiments of the present invention are described in detail below. Examples of the 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.

[0052] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and 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. Since the embodiments disclosed in this invention can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0053] Example 1

[0054] See Figure 1 and Figure 2 A range hood includes a fan frame 1, a fan system 2 disposed within the fan frame 1, and an air inlet assembly 3 disposed below the fan frame 1. The fan system 2 preferably employs a centrifugal fan, which can be a single-inlet fan or a dual-inlet fan, with its axis extending laterally. Preferably, the axis of the fan system 2 extends in a horizontal plane. In this invention, "lateral" refers to a horizontal or near-horizontal direction, with an angle between it and the horizontal plane ranging from -5° to 5°. The air inlet assembly 3 can adopt any existing form.

[0055] See Figures 2-7 The fan frame 1 includes a rear cover plate 11, a first side plate 12, a second side plate 13, a first adjusting plate 14, a second adjusting plate 15, a front cover plate 16, and an air outlet plate assembly 17. The first side plate 12 extends forward from the left end of the rear cover plate 11, and the second side plate 13 extends forward from the right end of the rear cover plate 11. Preferably, the rear cover plate 11, the first side plate 12, and the second side plate 13 are integrally formed, resulting in a U-shaped cross-section with an opening at the front end of the U-shape.

[0056] The first adjusting plate 14 and the first side plate 12 extend in the same direction and are at least partially located on the front side of the first side plate 12. The front cover plate 16 covers the front ends of the first adjusting plate 14 and the second adjusting plate 15. The first adjusting plate 14, the second adjusting plate 15, and the front cover plate 16 can be connected as a whole. The first side plate 12 and the first adjusting plate 14 can move (extend) relative to each other in a linear direction in the front-rear direction, thereby changing the overall depth dimension of the first side plate 12 and the first adjusting plate 14 in the front-rear direction. The first side plate 12 and the first adjusting plate 14 always maintain at least partial overlap in the front-rear direction, that is, along the entire height of the first side plate 12 and the first adjusting plate 14, the rear end of the first adjusting plate 14 remains located behind the front end of the first side plate 12 to avoid creating a gap that would cause depressurization of the fan frame 1.

[0057] Similarly, the second adjusting plate 15 and the second side plate 13 extend in the same direction and are at least partially located on the front side of the second side plate 13. The second side plate 13 and the second adjusting plate 15 can move (extend) relative to each other in a linear manner in the front-back direction, thereby changing the overall depth dimension of the second side plate 13 and the second adjusting plate 15 in the front-back direction. The second side plate 13 and the second adjusting plate 15 are always kept at least partially overlapping in the front-back direction, that is, along the entire height of the second side plate 13 and the second adjusting plate 15, the rear end of the second adjusting plate 15 is kept behind the front end of the second side plate 13 to avoid creating gaps that could cause depressurization of the fan frame 1.

[0058] The aforementioned plates constitute the frame structure of the fan frame 1. The rear cover plate 11, the first side plate 12, and the second side plate 13 constitute the first frame of the fan frame 1, while the first adjusting plate 14, the second adjusting plate 15, and the front cover plate 16 constitute the second frame of the fan frame 1. The front end of the first frame is inserted into the rear end of the second frame. Alternatively, a fixed transition plate can be provided between the first and second frames, allowing the first and second frames to move back and forth relative to the transition plate, with each frame partially overlapping the transition plate in the front-to-back direction.

[0059] An air outlet plate assembly 17 is disposed at the upper end of the frame structure, and includes a first air outlet plate 171, a second air outlet plate 172, a first movable plate 173, and a second movable plate 174. The first air outlet plate 171 is connected and fixed to the rear cover plate 11, the first side plate 12, and the second side plate 13 of the fan frame 1. The second air outlet plate 172 is stacked vertically on top of the first air outlet plate 171 and can partially overlap, as described in this embodiment, the second air outlet plate 172 is stacked on top of the first air outlet plate 171. The first movable plate 173 is used to fill the gap at the upper end of the frame structure (the area not covered by the first air outlet plate 171 and the second air outlet plate 172 at the upper end of the frame structure, forming an opening that allows fluid communication between the fan frame 1 and the upper part of the fan frame 1) when the fan is placed horizontally; the second movable plate 174 is used to fill the gap at the upper end of the frame structure when the fan is placed vertically.

[0060] A first air outlet 1711 is provided on the first air outlet plate 171, and a second air outlet 1721 is provided on the second air outlet plate 172. The first air outlet 1711 is larger than the second air outlet 1721. The relationship between the two must satisfy the condition that, before and after the second air outlet plate 172 rotates 90°, the second air outlet 1721 corresponds to the first air outlet 1711, to prevent the second air outlet 1721 from being blocked when the placement of the fan system 2 changes. If a state needs to be maintained after rotation angles other than 90°, the first air inlet 1711 and the second air outlet 1721 must also meet the above conditions. The first movable plate 173 and the second movable plate 174 can be stacked on top of the first air outlet plate 171 and are allowed to overlap with the second air outlet plate 172 to a certain extent (for ease of processing, etc.), but they must not block the second air outlet 1721. The shape of the first air outlet 1711 can be obtained through multiple experiments or simulations, as in this embodiment. Figure 4 The L-shape shown can be used as a basis to obtain the shapes of the first movable plate 173 and the second movable plate 174.

[0061] The second air outlet plate 172 is fixed to the fan system 2, and the second air outlet 1721 corresponds to the air outlet of the fan system 2.

[0062] The range hood also includes a first motion mechanism 4 for driving the second air outlet plate 172 to rotate, and a second motion mechanism 5 for driving the relative movement between the side plates and the corresponding adjusting plates. In this embodiment, the first motion mechanism 4 is a motor, which is mounted on the first air outlet plate 171, and its output end 41 is connected to the second air outlet plate 172 for transmission, thereby driving the second air outlet 172 to rotate about a vertical axis. Of course, the first motion mechanism 4 can also be other existing torque-outputting mechanisms. To avoid overly complex designs for the two movable plates, preferably, the second air outlet plate 172 rotates on a fixed axis.

[0063] The second motion mechanism 5 includes a first drive mechanism 51, a transmission rod 52, a first guide member 53, and a first slide rail assembly 54. The first drive mechanism 51 is a linear drive module, such as the combination of a motor lead screw and nut shown in this embodiment. Alternatively, other existing linear drive modules can be used, such as electric push rods, combinations of motor gears and racks, etc. The transmission rod 52 is located at the output end of the first drive mechanism 51, so that it can be driven by the first drive mechanism 51 to move linearly in the back-and-forth direction. Preferably, the first drive mechanism 51 can be located inside the fan frame 1 below the fan system 2. The transmission rod 52 extends in the left-right direction, and its two ends are directly or indirectly connected to the side plate and the adjusting plate on the corresponding side, respectively. In this embodiment, the transmission rod 52 is connected to the side plate and the adjusting plate via a first slide rail assembly 54. The first slide rail assembly 54 has two sets, each including a slidingly fitted first slide rail 541 and a second slide rail 542. The first slide rail 541 is fixed to the side of the first side plate 12 and the second side plate 13 facing inwards from the fan frame 1, respectively. The second slide rail 542 is fixed to the side of the first adjusting plate 14 and the second adjusting plate 15 facing inwards from the fan frame 1, respectively. The left and right ends of the transmission rod 52 are connected to the corresponding positions of the first slide rail 541, so that when the transmission rod 52 moves back and forth, it can drive the first side plate 12 and the second side plate 13 (together with the rear cover plate 11) to move back and forth. Alternatively, the transmission rod 52 can also be connected to the second slide rail 542.

[0064] The first guide member 53 is fixedly installed inside the fan frame 1. When each side plate is a fixed member, it is fixed to each side plate; when each adjusting plate is a fixed member, it is fixed to each adjusting plate. The left and right ends of the transmission rod 52 pass through the first guide member 53 at the corresponding positions. The first guide member 53 is provided with a guide groove 531, which extends along the moving path of the transmission rod 52 and guides the movement of the transmission rod 52, limiting its moving path.

[0065] This invention allows the fan system 2 to be rotated to match the depth of the wall-mounted cabinets in the installation environment (primarily for cabinet replacement scenarios) during installation. Of course, the fan system 2 can also be reversed in other situations requiring adjustment. See also Figure 2In this configuration, the fan system 2 is positioned horizontally, meaning its axis extends in the front-to-back direction (one of the horizontal directions). This configuration is suitable for cases where the wall cabinet depth is shallow and less than the depth of the horizontally positioned fan frame (the depth of the fan frame in a conventional horizontal configuration), such as in this example where it is greater than 320mm but less than 420mm. The second motion mechanism 5 is activated to reduce the depth of the fan frame 1 in the front-to-back direction, so that the depth of the fan frame 1 matches the depth of the wall cabinet. Then, the first motion mechanism 4 is activated to place the fan system 2 horizontally. (Whether the first motion mechanism 4 needs to be activated depends on the initial state during installation.) After completion, a replaceable range hood can be installed in a kitchen with shallow wall cabinets. In this configuration, preferably, the front end of the first air outlet plate 171 abuts against the front cover plate 16, and the first movable plate 173 fills the gap in the air outlet plate assembly 17. To allow for a certain range of adjustment, the front cover plate 16 can be adjusted towards... A baffle 18 extending laterally is provided on one side of the first air outlet plate 171. This baffle has a certain depth in the front-to-back direction and is located at the upper end of the first adjusting plate 14 and the second adjusting plate 15. It is stacked vertically with the air outlet plate assembly 17 to allow for some adjustment in the front-to-back direction, without requiring the first air outlet plate 171 and the front cover plate 16 to abut. Alternatively, another movable plate can be provided to replace the baffle 18, as long as it is ensured that there are no openings on the air outlet plate assembly 17 other than the second air outlet 1721 that would allow fluid communication between the inside and top of the fan frame 1.

[0066] See Figure 7 and Figure 8 This configuration represents the longitudinal placement of the fan system 2, where the axis of the fan system 2 extends in the left-right direction (one of the transverse directions). This configuration is suitable for cases where the depth of the wall cabinet is greater than the depth of the horizontally placed fan frame, such as in this example where it is greater than 420mm. During installation, the second motion mechanism 5 is first activated to adjust the depth of the fan frame 1 in the front-back direction so that the depth of the fan frame 1 matches the depth of the wall cabinet. Then, the fan system 2 is rotated to place it longitudinally. After completion, the first movable plate 173 (smaller) and the second movable plate 174 (larger) fill the gap at the upper end of the frame structure. At this time, the first movable plate 173 can be located between the front end of the first air outlet plate 171 and the front cover plate 16, and on one side of the second air outlet plate 172 in the left-right direction. The second movable plate 174 fills the other side and the rear part of the second air outlet plate 172 in the left-right direction. This configuration can minimize the noise of the range hood during use and improve the user experience.

[0067] Due to changes in the state of the fan frame 1 and the fan system 2, the air outlet plate assembly 17 may require adjustment or reassembly. Although the tight fit between the plates can ensure a certain degree of sealing, silicone can be applied to the bottom surface of the second air outlet plate 172 to further improve the sealing, or glue can be applied after each plate is installed.

[0068] When the depth of the fan frame 1 is small, such as when the fan is placed horizontally, and there is a gap between the fan frame 1 and the air inlet assembly 3, it can also be filled by other plates to avoid pressure leakage.

[0069] Example 2

[0070] See Figures 9-11 In this embodiment, the difference from Embodiment 1 is that a guide plate 6 is further provided below the fan system 2. For example, the guide plate 6 can be disposed within the air inlet assembly 3. The guide plate 6 has a downwardly convex shape and includes two integrally formed guide surfaces 61. The guide surfaces 61 are arc-shaped, gradually convex upwards from the center of the guide plate 6 towards each other. Alternatively, the guide plate 61 can also be a slope, extending gradually from bottom to top towards each other.

[0071] The range hood also includes a third motion mechanism 7 for driving the guide plate 6 to rotate around an axis extending in the vertical direction. It can be fixedly installed in the air inlet assembly 3 by a bracket 71. In this embodiment, the third motion mechanism 7 is a motor, and its output end is connected to the guide plate 6 for transmission, thereby driving the guide plate 6 to rotate.

[0072] See Figure 9 When the fan is placed horizontally, the guide plate 6 extends in the left-right direction, and its guide surface 61 is arranged front and back. Thus, the fumes entering from the air inlet assembly 3 are guided forward and backward by the two guide surfaces 61 as they rise, and correspondingly enter the fan system 2 through the air inlets 21 on the front and rear sides, respectively. The flow path of the fumes is shown in [reference needed]. Figure 9 As indicated by the middle arrow.

[0073] See Figure 10 When the fan is placed longitudinally, the guide plate 6 extends in the front-to-back direction, and its guide surfaces 61 are arranged left and right. Thus, the fumes entering from the air inlet assembly 3 are guided to the left and right by the two guide surfaces 61 as they rise, and correspondingly enter the fan system 2 through the air inlets 21 on the left and right sides, respectively. The flow path of the fumes is shown in [reference needed]. Figure 10 As indicated by the middle arrow.

[0074] By setting the guide plate 6, the effective area of ​​the flow channel can be increased and the flow channel can be adapted to the fan system 2 for a smoother flow.

[0075] If a state other than 90° is required after rotation, the extension direction of the guide vane 6 is perpendicular to the axis of the fan system 2. Of course, other angles can also be selected as needed.

[0076] Example 3

[0077] See Figures 12-14In this embodiment, the difference from Embodiment 1 is that the air outlet plate assembly uses a third movable plate 175 instead of the first movable plate 173 and the second movable plate 174. The first air outlet plate 171, the second air outlet plate 172, and the third movable plate 175 are stacked sequentially from bottom to top to avoid interference during rotation. Furthermore, the shape of the baffle 18 in this embodiment differs from that in Embodiment 1; it can be a U-shape with the opening facing backward. Suitable shapes for the third movable plate 175 and the baffle 18 can be obtained through multiple experiments.

[0078] The range hood also includes a fourth motion mechanism 8 for driving the third movable plate 175 to rotate about an axis extending in the vertical direction. Similar to the first motion mechanism 4, it can be set on the first air outlet plate 171, and its output end is connected to the third movable plate 175 in a transmission connection.

[0079] Therefore, when the front and rear depth adjustment of the fan frame 1 increases, the second air outlet plate 172 and the third movable plate 175 are adjusted from... Figure 12 After rotating the shown state by 90°, see [link / reference]. Figure 15 and Figure 16 The axis of the fan system 2 is changed from extending in the front-to-back direction to extending in the left-to-right direction. The baffle 18 can block the gap between the first air outlet plate 171 and the front cover plate 16, as well as the gap between the third movable plate 175 and the front cover plate 16.

[0080] In this embodiment, the guide plate 6 from embodiment two can also be used.

[0081] Example 4

[0082] See Figures 17-21 In this embodiment, the difference from the above embodiment three is that the fan frame 1 can extend and retract in the left and right directions to adjust the width in the left and right directions to adapt to the wall cabinets of different widths.

[0083] The fan frame 1 also includes a rear cover plate 11, a first side plate 12, a second side plate 13, a front cover plate 16, and an air outlet plate assembly 17, but without an adjustment plate. The rear cover plate 11 and the front cover plate 16 are fixed relative to the air inlet assembly 3. The first side plate 12 is located between the left sides of the rear cover plate 11 and the front cover plate 16, and the second side plate 13 is located between the right sides of the rear cover plate 11 and the front cover plate 16.

[0084] The upper end of the first side plate 12 is bent toward the second side plate 13 to form a first upper bend 121. The front and rear ends of the first side plate 12 are bent toward the second side plate 13 to form first side bends 122. The upper end of the second side plate 13 is bent toward the first side plate 12 to form a second upper bend 131. The front and rear ends of the second side plate 13 are bent toward the first side plate 12 to form second side bends 132. The first upper bend 121 and the second upper bend 131 preferably extend in the horizontal direction, and the two upper bends can be close to the lower part of the first air outlet plate 171. The first side bend 131 and the second side bend 132 preferably extend in the vertical direction, and the two side bends can be close to the rear side of the front cover plate 16.

[0085] The aforementioned first side plate 12 and its bend, and second side plate 13 and its bend, function as an adjustment plate. The first side plate 12 and its bend constitute the first frame, and the second side plate 13 and its bend constitute the second frame. When the first side plate 12 and the second side plate 13 move toward each other, such that the first upper bend 121 and the second upper bend 131 are hidden under the air outlet plate assembly 17, the first side bend 122 and the second side bend 132 at the front end are hidden behind the front cover plate 16, and the first side bend 122 and the second side bend 132 at the rear end are hidden in front of the rear cover plate 11, the width dimension of the fan frame 1 reaches its minimum. When the first side plate 12 and the second side plate 13 move away from each other, such that the first upper bend 121 and the second upper bend 131 are almost fully exposed in the air outlet plate assembly 17, and the first side bend 122 and the second side bend 132 are almost fully exposed in the rear front cover 16 and the rear cover 11, the width of the fan frame 1 reaches its maximum. Alternatively, the width of the fan frame 1 can be in an intermediate state between its minimum and maximum. The range of adjustment for the fan frame 1 in the left-right direction depends on the width of each bend, typically between 100mm and 150mm.

[0086] Therefore, the range hood also includes a fifth motion mechanism 9, used to drive the first side plate 12 and the second side plate 13 to move left and right, thereby driving each bent part to move left and right, realizing the adjustment of the width dimension of the fan frame 1 in the left and right direction. Preferably, the fifth motion mechanism 9 includes a second drive mechanism 91, a first connecting rod 92, a second connecting rod 93, a second guide member 94, and a second slide rail assembly 95. The second drive mechanism 91 is a linear drive module, such as the combination of motor screw and nut shown in this embodiment. Alternatively, other existing linear drive modules can be used, such as electric push rods, combinations of motor gears and racks, etc. There are two first connecting rods 92 and two second connecting rods 93, which are arranged side by side with intervals, and each second connecting rod 93 extends in the front and rear direction. The front end of each second connecting rod 93 is connected to a second sliding assembly 95. The second sliding assembly 95 on the left front end slides the front cover plate 16 and the first side plate 12, and the second sliding assembly 95 on the right front end slides the front cover plate 16 and the second side plate 13. Each second link 93 is also connected to a second sliding assembly 95 at its rear end. The second sliding assembly 95 on the left rear end slides the rear cover plate 11 and the first side plate 12 together, and the second sliding assembly 95 on the right rear end slides the rear cover plate 11 and the second side plate 13 together. One end of each first link 92 is rotatably connected to the output end of the second drive mechanism 91, and the other end of each first link 92 is rotatably connected to the second link 93. The axis of rotation of the first link 92 extends vertically. There are four second guide members 94, each corresponding to one end of the second link 93, thereby defining the movement path of the second guide member 94. The front second guide member 94 is fixed to the front cover plate 16, and the rear second guide member 94 is fixed to the rear cover plate 11. The structure of the second guide member 94 can be the same as that of the first guide member 53, and the structure of the second sliding assembly 95 can be the same as that of the first sliding assembly 54.

[0087] Therefore, when the second motion mechanism 91 is running, its output end moves linearly in the front-back direction, driving the first link 92 and its connected end to move synchronously. Due to the restriction of the second link 93 (the second link 93 can only move in the left-right direction), the two first links 92 rotate, thereby driving the corresponding second links 93 to move left and right. The two second links 93 move in opposite directions, thus causing the first frame and the second frame to move in opposite directions.

[0088] The fifth motion mechanism 9 can be replaced by other mechanisms that can drive the first side plate 12 and the second side plate 13 to move linearly in opposite directions, such as a crank-slider mechanism sharing the same crank, or a gear and rack mechanism (two racks meshing with the same gear). Alternatively, the first side plate 12 and the second side plate 13 can no longer be linked, but can be driven by independent linear drive modules.

[0089] The form of the air outlet plate assembly 17 is similar to that of Embodiment 3. The shape of each plate of the air outlet plate assembly 17 can be adaptively adjusted, and the specific shape can be obtained through experiments or simulations.

[0090] In this embodiment, the fan system 2 can be rotated to match the width of the wall cabinet in the installation environment (mainly for replacement scenarios) during in-home installation. See also Figures 17-21 In the horizontal position of the fan system 2, the axis of the fan system 2 extends in the front-to-back direction (one of the horizontal directions). This position is suitable for when the width of the wall cabinet is large, such as greater than 420mm. First, the fifth motion mechanism 9 is activated to increase the width of the fan frame 1 in the left-to-right direction. At this time, at least part of each bend is exposed on the front cover plate 16, the rear cover plate 11 and the air outlet plate assembly 17, so that the width of the fan frame 1 matches the width of the wall cabinet. Then, the fan system 2 is placed horizontally.

[0091] See Figure 22 and Figure 23 This is the longitudinal placement of the fan, meaning the axis of the fan system 2 extends in the left-right direction (one of the transverse directions). This configuration is suitable for cabinets with a relatively small width, such as 320mm to 370mm. During installation, the fifth motion mechanism 9 is activated first to reduce the width of the fan frame 1 in the left-right direction. At this time, all bends are almost completely hidden in the front cover plate 16 and the rear cover plate 11, so that the width of the fan frame 1 matches the width of the cabinet. Then, the fan system 2 is placed longitudinally.

Claims

1. A range hood, comprising a fan frame (1) and a fan system (2) disposed within the fan frame (1), characterized in that: The wind turbine frame (1) includes a frame structure, which includes a first frame and a second frame. The first frame and the second frame are arranged front to back so that they can move relative to each other in the front-back direction to change the depth of the wind turbine frame (1), or the first frame and the second frame are arranged left to right so that they can move relative to each other in the left-right direction to change the width of the wind turbine frame (1). The axis of the fan system (2) extends laterally and can rotate about the vertically extending axis to match the size of the fan frame (1); Below the fan system (2), there is also a guide plate (6). The guide plate (6) is generally convex downward. The guide plate (6) rotates around the vertical axis, thereby guiding the oil fume to the air inlet (21) of the fan system (2). The guide plate (6) includes two guide surfaces (61) with an integral structure. The guide surfaces (61) are arc-shaped, which gradually convex upward from the middle of the guide plate (6) and move away from each other. Alternatively, the guide surfaces (61) are inclined surfaces that gradually move away from each other from bottom to top.

2. The range hood according to claim 1, characterized in that: The fan frame (1) also includes an air outlet plate assembly (17) disposed at the upper end of the frame structure. The air outlet plate assembly (17) includes a first air outlet plate (171) fixed to the first frame and a second air outlet plate (172) fixed and linked to the fan system (2). The first air outlet plate (171) has a first air outlet (1711) and the second air outlet plate (172) has a second air outlet (1721). (172) When rotated to different states to be maintained, the second air outlet (1721) corresponds to the first air outlet (1711), and the second air outlet (1721) corresponds to the air outlet of the fan system (2); the air outlet plate assembly (17) also includes a movable plate for filling the gaps other than the second air outlet (1721), the gaps being openings formed at the upper end of the frame structure to allow fluid communication between the fan frame (1) and the top of the fan frame (1).

3. The range hood according to claim 2, characterized in that: The movable plate is a plate that can fill the gap after the state of the fan system (2) changes.

4. The range hood according to claim 2, characterized in that: The movable plate is a plate that is stacked on top of the first air outlet plate (171) and the second air outlet plate (172) and can rotate around an axis extending in the vertical direction.

5. The range hood according to claim 2, characterized in that: The upper end of the frame structure is provided with a baffle (18), which is located at the front end of the frame structure and is stacked on top of the air outlet plate assembly (17).

6. The range hood according to claim 2, characterized in that: The range hood also includes a first motion mechanism (4) mounted on the first air outlet plate (171), which drives the second air outlet plate (172) and the fan system (2) to rotate on a fixed axis.

7. The range hood according to any one of claims 1 to 6, characterized in that: The first frame includes a rear cover plate (11), a first side plate (12), and a second side plate (13). The first side plate (12) extends forward from the left end of the rear cover plate (11), and the second side plate (13) extends forward from the right end of the rear cover plate (11). The second frame includes a first adjusting plate (14), a second adjusting plate (15), and a front cover plate (16). The first adjusting plate (14) and the first side plate (12) extend in the same direction and are at least partially located in front of the first side plate (12). The first side plate (12) and the first adjusting plate (14) always maintain at least partial overlap in the front-rear direction. The second adjusting plate (15) and the second side plate (13) extend in the same direction and are at least partially located in front of the second side plate (13). The second side plate (13) and the second adjusting plate (15) always maintain at least partial overlap in the front-rear direction. The front cover plate (16) covers the front ends of the first adjusting plate (14) and the second adjusting plate (15).

8. The range hood according to claim 7, characterized in that: The front end of the first frame is inserted into the rear end of the second frame; the range hood also includes a second motion mechanism (5) for driving the relative movement of the first frame and the second frame, the second motion mechanism (5) includes a first drive mechanism (51), the first drive mechanism (51) is a linear drive module, and the first drive mechanism (51) is connected to the first frame in a transmission manner.

9. The range hood according to claim 8, characterized in that: The second motion mechanism (5) further includes a transmission rod (52) and a first slide rail assembly (54). The transmission rod (52) is located at the output end of the first drive mechanism (51) and extends in the left and right direction. The first slide rail assembly (54) has two sets. Each set of the first slide rail assembly (54) includes a slidingly engaged first slide rail (541) and a second slide rail (542). The first slide rail (541) is fixed to the side of the first side plate (12) and the second side plate (13) facing the inside of the fan frame (1), respectively. The second slide rail (542) is fixed to the side of the first adjusting plate (14) and the second adjusting plate (15) facing the inside of the fan frame (1), respectively. The left and right ends of the transmission rod (52) are respectively connected to the first slide rail (541) at the corresponding positions.

10. The range hood according to any one of claims 1 to 6, characterized in that: The frame structure includes a rear cover plate (11), a first side plate (12), a second side plate (13), and a front cover plate (16) spaced apart on the front side of the rear cover plate (11). The first side plate (12) is located between the left side of the rear cover plate (11) and the front cover plate (16), and the second side plate (13) is located between the right side of the rear cover plate (11) and the front cover plate (16). The fan frame (1) also includes an air outlet plate assembly (17) disposed at the upper end of the frame structure. The upper end of the first side plate (12) is bent toward the second side plate (13) to form a first upper bend (121). The front and rear ends of the first side plate (12) are respectively bent toward the second side plate (13). The first side bend (122) is formed by bending in the direction of the second side plate (12). The upper end of the second side plate (13) is bent in the direction of the first side plate (12) to form the second upper bend (131). The front and rear ends of the second side plate (13) are bent in the direction of the first side plate (12) to form the second side bend (132). The first side plate (12) and its bends constitute the first frame. The second side plate (13) and its bends constitute the second frame. Each upper bend can be hidden or exposed in the air outlet plate assembly (17). Each side bend at the front end can be hidden or exposed in the front cover plate (16). Each side bend at the rear end can be hidden or exposed in the rear cover plate (11).

11. The range hood according to claim 10, characterized in that: The range hood also includes a fifth motion mechanism (9) for driving the first side plate (12) and the second side plate (13) to move left and right in opposite directions.

12. The range hood according to claim 11, characterized in that: The fifth motion mechanism (9) includes a second drive mechanism (91), a first link (92), a second link (93), and a second sliding component (95). The second drive mechanism (91) is a linear drive module. There are two of the first link (92) and the second link (93). The two second links (93) are arranged side by side with intervals. Each second link (93) extends in the front-back direction. Each second link (93) is connected to a second sliding component (95) at both ends. The second sliding component (95) on the left front end slides the front cover plate (16) and the first side plate (12). The second sliding component (95) on the right front end slides the front cover plate (16) and the second side plate (13). The second sliding component (95) on the left rear end slides the rear cover plate (11) and the first side plate (12). The second sliding component (95) on the right rear end slides the rear cover plate (11) and the second side plate (13).

13. The range hood according to any one of claims 1 to 6, characterized in that: An air intake assembly (3) is provided below the fan frame (1), and the guide plate (6) is disposed inside the air intake assembly (3); the range hood also includes a third motion mechanism (7) for driving the guide plate (6) to rotate around an axis extending in the vertical direction, and the third motion mechanism (7) is fixedly disposed inside the air intake assembly (3) by a bracket (71).

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