A range hood with switchable side suction and top suction modes

Abstract

The present invention discloses a range hood switchable between side suction and top suction modes, comprising a supporting shell and a movable part, wherein a fixing frame is fixedly provided on a side of the supporting shell away from the movable part, the supporting shell is slidably connected to the movable part, a separation grate is detachably mounted on a side of the movable part away from the supporting shell, and an oil cup is detachably mounted on one side of the movable part; the movable part can slide relative to the supporting shell, thereby driving the separation grate and the centrifugal fan to move together, so that the present invention can flexibly switch between top suction mode and side suction mode, and is suitable for different working environments; it can flexibly switch between the two modes without shutting down the range hood and restarting it, and has strong applicability, meeting the needs of diversified cooking methods in the kitchen; oil droplets accumulated on the separation grate can not only flow downward into the oil cup in the side suction mode, but can also be divided into a male plate and a female plate hinged to each other, and it is roof-shaped in the top suction mode, which will not cause the oil droplets to be unable to flow smoothly in the top suction mode.

Description

Technical Field

[0001] The present invention belongs to the technical field of range hoods, and in particular relates to a range hood with switchable side suction and top suction modes. Background Art

[0002] Existing range hoods can be divided into top-suction range hoods and side-suction range hoods. Top-suction range hoods have a larger operating space, but the suction effect is not as good as that of side-suction range hoods. Side-suction range hoods can suck in oil smoke when the oil smoke is very low.

[0003] In modern kitchens, cooking methods are diverse, and a single range hood working mode can no longer meet the needs. Side-suction and top-suction range hoods have different functions. Top-suction range hoods are suitable for cooking methods with low oil vapor content. The oil smoke is light and rises vertically quickly. In addition, the vertical distance between the stove and the range hood is large, which allows for complex operations such as flipping the pan when stir-frying. Side-suction range hoods are suitable for cooking methods with high oil vapor content. The oil smoke contains a large amount of water vapor, and the vertical rise of the oil smoke is interfered by gravity, which is prone to horizontal dissipation. Side-suction range hoods can capture most of the oil smoke horizontally.

[0004] Some existing range hoods simply combine side suction and top suction and use multiple centrifugal fans, which not only increases the cost but also makes maintenance and upkeep inconvenient. Although the simple combination brings some advantages of the two range hoods, it also brings disadvantages. The problem of small operating space caused by side suction range hoods still cannot be solved. Summary of the Invention

[0005] In order to solve the above-mentioned problems existing in the prior art, the object of the present invention is to provide a range hood with switchable side suction and top suction modes.

[0006] The technical solution adopted in the present invention is:

[0007] A range hood with switchable side-suction and top-suction modes comprises a carrying shell and a movable part, wherein a fixing frame is fixedly provided on a side of the carrying shell away from the movable part, the carrying shell is slidably connected to the movable part, a separation grate is detachably mounted on a side of the movable part away from the carrying shell, and an oil cup is detachably mounted on one side of the movable part; a sealing plate is provided between the separation grate and the carrying shell, the sealing plate is fixedly connected to the movable part, and a centrifugal fan is detachably mounted on the sealing plate.

[0008] As a preferred embodiment of the present invention, a sliding bar is fixedly provided on one side of the movable part close to the supporting shell, and a sliding groove adapted to the sliding bar is provided on the supporting shell; a handle is provided on one side of the sliding bar, the handle is fixedly connected to the sealing plate, and a limiting groove is provided on the supporting shell, and the handle slides in the limiting groove.

[0009] As a preferred embodiment of the present invention, the centrifugal fan includes a motor housing, an arc track is fixedly provided on one side of the fixed frame, the motor housing is slidably arranged in the arc track, a motor is fixed in the motor housing, an impeller is fixed on the output shaft of the motor, the impeller is rotatably arranged in the volute, a mounting ring is fixed on the sealing plate, the volute is detachably mounted on the mounting ring, and a smoke exhaust pipe is fixed on one side of the air outlet of the volute.

[0010] As a preferred embodiment of the present invention, a placement space is provided in the fixing frame, one end of the curved track extends into the placement space and is fixedly connected to an inner wall of one side of the placement space, and a sleeve is provided on each side of the curved track; one end of the sleeve is fixedly connected to an inner wall of one side of the placement space, and each sleeve is slidably provided with a connecting rod on the side close to the curved track, a control spring is provided in the sleeve, one end of the control spring is fixedly connected to the sleeve, and the other end of the control spring is fixedly connected to the connecting rod; each connecting rod is fixedly provided with a trapezoidal block on the end away from the sleeve, the trapezoidal block is slidably connected to the curved track, and two trapezoidal blocks are respectively located on both sides of the curved track.

[0011] As a preferred embodiment of the present invention, a connecting part is fixedly provided on a side of the movable part close to the oil cup, a mounting pin is fixedly provided on an end of the connecting part away from the movable part, an oil cup holder is fixedly provided on one side of the oil cup, a blind hole is provided on one side of the oil cup holder, and the oil cup holder is detachably mounted on the mounting pin; a plurality of oil dripping ports are fixedly provided on a side of the separation grate close to the oil cup.

[0012] As a preferred embodiment of the present invention, the oil cup holder is rotatably connected to the mounting pin, the oil cup is fixedly provided with an alignment groove, the alignment groove corresponds to the connecting piece, one end of the oil cup holder is fixedly provided with a T-bar, a control block is slidably provided on the T-bar, a multi-stage gas spring is provided on the side of the control block away from the oil cup holder, one end of the multi-stage gas spring is fixedly provided with a slider, the slider is slidably set on a slide rail, and the slide rail is fixedly connected to the fixed frame; the sliding trajectory of the slider along the slide rail, the telescopic trajectory of the multi-stage gas spring, and the sliding trajectory of the control block along the T-bar are respectively perpendicular to each other in different planes.

[0013] As a preferred embodiment of the present invention, the separation grate includes a male plate, a female plate and a plate frame, a pair of blind holes are fixedly provided on the side of the plate frame close to the oil cup and the side away from the oil cup, a rotating shaft is detachably installed in the pair of blind holes of the plate frame, and the male plate and the female plate are respectively rotatably connected to the rotating shaft; the male plate and the female plate are in a grid shape.

[0014] As a preferred embodiment of the present invention, a guide groove is fixedly provided on the side of the male plate and the female plate away from each other, and the depth of the guide groove away from the oil cup is greater than the depth of the guide groove close to the oil cup; a top block is fixedly provided on both sides of the supporting shell.

[0015] As a preferred embodiment of the present invention, two torsion springs are provided on the rotating shaft, and the two torsion springs are respectively located at two ends of the rotating shaft, and the two torsion springs are respectively used to control the male plate and the female plate.

[0016] As a preferred embodiment of the present invention, a top strip is detachably installed in the slide groove, a placement groove is fixedly provided on the bearing shell, the top strip is slidably set in the placement groove, a return spring is detachably installed in the placement groove, one end of the return spring is fixedly connected to the placement groove, the other end of the return spring is fixedly connected to the top strip, and the top strip forms a transition surface at one end close to the sealing plate.

[0017] The beneficial effects of the present invention are as follows: as a range hood capable of switching between side suction and top suction modes, the movable part can slide relative to the supporting shell, thereby driving the separation grate and the centrifugal fan to move together, so that the present invention can flexibly switch between the top suction mode and the side suction mode, and is suitable for different working environments; it can flexibly switch between the two modes without shutting down the range hood and restarting it, and has strong applicability, meeting the needs of diversified cooking methods in the kitchen; through the action of the trapezoidal block and the control spring, the present invention can stably maintain this state after switching to the top suction mode when not subject to external force, and when manually operated, it can sense the force By changing the mode, it is possible to clearly know whether the switching mode is in place, thereby avoiding the sliding of the movable parts during use due to inappropriate switching mode; the oil cup of the present invention will always remain in a horizontal state, and when the mode is switched back and forth, the oil cup will not flip over and cause oil spillage; the oil droplets accumulated on the separation grate can not only flow downward into the oil cup in the side suction mode, but also be divided into a male plate and a female plate hinged to each other, and in the top suction mode it is roof-shaped, so that the oil droplets accumulated on the separation grate flow horizontally and enter the oil cup smoothly through guidance, which will not cause the oil droplets to be unable to flow smoothly in the top suction mode and then accumulate until they drip onto the stove or even the pot. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0019] Figure 1 This is a schematic diagram of the side suction state structure of the present invention;

[0020] Figure 2 This invention Figure 1 A schematic diagram of the enlarged structure at point A;

[0021] Figure 3This invention Figure 1 A side structural diagram of

[0022] Figure 4 This invention Figure 1 Schematic diagram of the rear view structure;

[0023] Figure 5 This invention Figure 1 A front view structural diagram of

[0024] Figure 6 This invention Figure 1 Schematic diagram of the structure viewed from above;

[0025] Figure 7 This invention Figure 1 Schematic diagram of the structure of the moving parts;

[0026] Figure 8 This invention Figure 7 Schematic diagram of the structure viewed from above;

[0027] Figure 9 This is a schematic diagram of the top suction structure of another embodiment of the present invention;

[0028] Figure 10 This invention Figure 9 A side structural diagram of

[0029] Figure 11 This invention Figure 9 Schematic diagram of the rear view structure;

[0030] Figure 12 This invention Figure 9 A front view structural diagram of

[0031] Figure 13 This invention Figure 9 Schematic diagram of the structure viewed from above;

[0032] Figure 14 This invention Figure 13 Schematic diagram of separation grate structure;

[0033] Figure 15 This invention Figure 6 Schematic diagram of the top bar structure. DETAILED DESCRIPTION

[0034] In order to make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present invention and are not intended to limit the present invention. That is, the embodiments described herein are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely intended to represent selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0036] The following combination Figure 1-15 The specific embodiment of the present invention is described as a range hood with switchable side suction and top suction modes, comprising a supporting shell 14 and a movable part 17, wherein a fixing frame 27 is fixedly provided on a side of the supporting shell 14 away from the movable part 17, the supporting shell 14 is slidingly connected to the movable part 17, a separating grate 39 is detachably installed on a side of the movable part 17 away from the supporting shell 14, and an oil cup 18 is detachably installed on one side of the movable part 17; a sealing plate 19 is provided between the separating grate 39 and the supporting shell 14, the sealing plate 19 is fixedly connected to the movable part 17, and a centrifugal fan is detachably installed on the sealing plate 19. The movable part 17 can slide (rotate) relative to the supporting shell 14, thereby driving the separation grate 39 and the centrifugal fan to move together, so that the present invention can flexibly switch between the top suction mode and the side suction mode, and is suitable for different working environments; the top suction mode is suitable for cooking methods with a small amount of oil smoke and water vapor, such as stir-frying and frying, and in the top suction mode, the vertical distance between the stove and the separation grate 39 is large, and complex operations such as flipping the pan can be performed during stir-frying; the side suction mode is suitable for cooking methods with a large amount of oil smoke and water vapor, such as stewing, boiling, braising, and simmering. The water vapor content in the oil smoke is large, and the vertical rise of the oil smoke is disturbed by gravity, and it is easy to escape horizontally. At this time, the side suction mode can capture part of the oil smoke horizontally, and the separation grate 39 is close to the stove. In the initial rising stage of the oil smoke, it is guided by the suction of the centrifugal fan, thereby quickly passing through the separation grate 39 and entering the range hood; the present invention can flexibly switch between the two modes, and there is no need to shut down the range hood and restart it. It has strong applicability and meets the needs of diversified kitchen cooking methods.

[0037] Advantageously, a slide bar 20 is fixedly provided on one side of the movable member 17 near the carrier shell 14, and a slide groove is provided on the carrier shell 14 to match the slide bar 20. A handle 16 is provided on one side of the slide bar 20, and the handle 16 is fixedly connected to the sealing plate 19. The carrier shell 14 is provided with a limiting groove 15, and the handle 16 slides within the limiting groove 15. The slide bar 20 and the slide groove are not simply straight grooves and straight bars, but rather interlocking dovetail structures that do not allow for vertical separation. After the fixing bracket 27 is fixed to the kitchen wall or ceiling, the carrier shell 14 has a fixed position, and the mode can be switched by adjusting the position of the movable member 17. The handle 16 is located above the carrier shell 14 and is not easily stained by oil, so it can be safely operated directly by hand.

[0038] Advantageously, the centrifugal fan includes a motor housing 26, a curved track 25 fixed to one side of the fixing frame 27, the motor housing 26 slidably disposed within the curved track 25, a motor fixed within the motor housing 26, an impeller 37 fixed to the output shaft of the motor, the impeller 37 rotatably disposed within the volute 12, a mounting ring 41 fixed to the sealing plate 19, the volute 12 removably mounted on the mounting ring 41, and a smoke exhaust pipe 21 fixed to one side of the air outlet of the volute 12. Whether in top suction mode or side suction mode, the centrifugal fan always moves with the movable member 17, and the centrifugal fan's suction port always faces the separation grate 39, effectively absorbing oil smoke. Furthermore, range hood centrifugal fans are a mature technology, and automatic cleaning methods such as heating, high temperature, and steam are readily available to those skilled in the art, and the present invention will not be further elaborated. The above functions can clean the impeller 37, the volute 12, and some hard-to-reach areas, reducing the growth of internal bacteria and improving the efficiency of the range hood.

[0039] Advantageously, a placement space 36 is provided in the fixing frame 27, one end of the arc track 25 extends into the placement space 36 and is fixedly connected to an inner wall of one side of the placement space 36, and a sleeve 35 is provided on each side of the arc track 25; one end of the sleeve 35 is fixedly connected to an inner wall of one side of the placement space 36, and each sleeve 35 is slidably provided with a connecting rod 34 on the side close to the arc track 25, and a control spring is provided in the sleeve 35, one end of the control spring is fixedly connected to the sleeve 35, and the other end of the control spring is fixedly connected to the connecting rod 34; each connecting rod 34 is fixedly provided with a trapezoidal block 33 on the end away from the sleeve 35, and the trapezoidal block 33 is slidably connected to the arc track 25, and two trapezoidal blocks 33 are respectively located on both sides of the arc track 25. The two trapezoidal blocks 33 can be regarded as spring clips. By controlling the action of the spring, the present invention can maintain this state continuously and stably after switching to the top suction mode when not subject to external force. During manual operation, by feeling the change in force, it can be clearly known whether the switching mode is in place, avoiding the switching mode not being in place, causing the movable part 17 to slip during use.

[0040] Advantageously, a connector 30 is fixedly provided on the side of the movable member 17 near the oil cup 18. A mounting pin 42 is fixedly provided on the end of the connector 30 away from the movable member 17. An oil cup holder 31 is fixedly provided on one side of the oil cup 18. A blind hole is provided on one side of the oil cup holder 31, and the oil cup holder 31 is removably mounted on the mounting pin 42. A plurality of oil drip ports 38 are fixedly provided on the side of the separation grate 39 near the oil cup 18. The oil cup 18 can collect oil from the surface of the separation grate 39 (when oil smoke encounters the cold separation grate 39, some oil is separated and adheres to the separation grate 39, accumulating to form oil droplets) and from the interior (grease from the centrifugal fan impeller 37 drips and is guided to flow between the separation grate 39 and the sealing plate 19, entering the oil cup 18 through the oil drip ports 38).

[0041] Advantageously, the oil cup holder 31 is rotatably connected to the mounting pin 42, and an alignment groove 29 is fixedly provided on the oil cup 18, and the alignment groove 29 corresponds to the connecting piece 30. A T-bar 28 is fixedly provided at one end of the oil cup holder 31, and a control block 32 is slidably provided on the T-bar 28. A multi-stage gas spring 22 is provided on the side of the control block 32 away from the oil cup holder 31, and a slider 23 is fixedly provided at one end of the multi-stage gas spring 22. The slider 23 is slidably set on a slide rail 24, and the slide rail 24 is fixedly connected to the fixed frame 27; the sliding trajectory of the slider 23 along the slide rail 24, the telescopic trajectory of the multi-stage gas spring 22, and the sliding trajectory of the control block 32 along the T-bar 28 are respectively perpendicular to each other in different planes. Under the action of the above-mentioned mechanism, the oil cup 18 always maintains a horizontal state. When the mode is switched back and forth, the oil cup 18 will not flip over and cause oil to spill. Among them, the multi-stage gas spring 22 refers to a three-section controllable gas spring disclosed in CN207935336U and belongs to a mature existing technology.

[0042] Advantageously, the separation grate 39 comprises a male plate 45, a female plate 46, and a plate frame 47. A pair of blind holes are fixedly provided on the plate frame 47 on one side proximal to the oil cup 18 and the other side distal to the oil cup 18. A rotating shaft 48 is removably mounted within the pair of blind holes in the plate frame 47. The male plate 45 and the female plate 46 are rotatably connected to the rotating shaft 48. The male plate 45 and the female plate 46 form a grid pattern. Specifically, the grid pattern comprises fine cylindrical mesh plates (in the accompanying drawings, the fine lines and rounded corners are omitted for ease of illustration). Oil droplets accumulated on the separation grate 39 can not only flow downward into the oil cup 18 in side suction mode, separating them into the hinged male plate 45 and female plate 46, but can also flow laterally in top suction mode, being guided smoothly into the oil cup 18. This prevents oil droplets from being blocked from flowing smoothly in top suction mode and accumulating until they drip onto the stovetop or even into the pot.

[0043] Advantageously, a guide groove 49 is fixedly formed on the side of the male plate 45 and the female plate 46 facing away from each other. The depth of the guide groove 49 on the side away from the oil cup 18 is greater than the depth on the side closer to the oil cup 18. A top block 44 is fixedly formed on each side of the carrier shell 14. The interior of the guide groove 49 has a gently sloping structure, which can guide oil droplets flowing into it into the oil cup 18.

[0044] Advantageously, two torsion springs are provided on the rotating shaft 48, one at each end of the rotating shaft 48, and the other for controlling the male plate 45 and the female plate 46. The torsion springs keep the male plate 45 and the female plate 46 parallel in the side suction mode, so that the side suction mode is not affected.

[0045] Advantageously, a top strip 40 is removably mounted within the chute. A mounting groove 13 is fixedly provided on the support shell 14. The top strip 40 is slidably mounted within the mounting groove 13. A return spring is removably mounted within the mounting groove 13. One end of the return spring is fixedly connected to the mounting groove 13, and the other end of the return spring is fixedly connected to the top strip 40. The end of the top strip 40 adjacent to the sealing plate 19 forms a transition surface 50. The top strip 40 prevents the chute from easily accumulating oil stains, thereby preventing smooth operation. Furthermore, it should be noted that under the action of the centrifugal fan in side-suction mode, the exposed bottom portion of the support plate 14 has very little oil stains attached to it, and most of the oil smoke is directed into the separation grate 39.

[0046] Working principle of the present invention:

[0047] Reference Attachment Figure 1-8 The oil smoke is sucked by the centrifugal fan through the separation grate 39; when the hot oil smoke passes through the cold separation grate 39, part of the oil is separated and attached to the separation grate 39, and then flows into the oil cup 18 after being gathered; another part of the oil is separated at the impeller 37, gathered and flows into the space between the sealing plate 19 and the separation grate 39, and then flows into the oil cup 18 through the oil dripping port 38;

[0048] In the side suction mode, the bearing shell 14 is horizontal and the movable part 17 is tilted as a whole (the return spring is compressed, the control spring is compressed, and the multi-stage gas spring 22 is compressed); in the top suction mode, the bearing shell 14 and the movable part 17 are both horizontal (the return spring is further compressed, the control spring is compressed, and the multi-stage gas spring 22 is further compressed);

[0049] When the side suction mode is switched to the top suction mode, the handle 16 is manually pulled to change the movable part 17 from tilted to horizontal. During this period, the multi-stage gas spring 22, the return spring, and the control spring are manually overcome to do work. After the control spring is reset, the movable part 17 is in a balanced state, and the elastic force of the return spring is offset by the vertical limit of the slide bar 20 and the slide groove. In this state, without external force, the multi-stage gas spring 22 cannot force the control spring to be further compressed, so that the present invention maintains the top suction mode. Specifically:

[0050] When the handle 16 is manually pulled, the movable part 17 moves as a whole, and the motor housing 26 slides along the arc track 25. After the motor housing 26 contacts the trapezoidal block 33 (the trapezoidal block 33 has an excessive slope), the two trapezoidal blocks 33 move to both sides, and the connecting rod 34 moves with the trapezoidal block 33. The control spring is further compressed. When the motor housing 26 moves to the innermost part of the placement space 36, the trapezoidal block 33 is no longer squeezed, and the control spring is reset. During this process, the slider 23 slides along the slide rail 24, and the multi-stage gas spring 22 is further compressed. The control block 32 keeps the oil cup holder 31 in a horizontal state at all times. The state of the oil cup 18 is consistent with that of the oil cup holder 31, and they are always kept horizontal.

[0051] When switching from top suction mode to side suction mode, just pull the handle 16 in the opposite direction. The same principle as above, the combined force of human work and the multi-stage gas spring 22 further compresses the control spring. When the motor housing 26 passes over the trapezoidal block 33, the control spring resets. At this time, no external force is required. Under the action of the multi-stage gas spring 22, the motor housing 26 will slide to the bottom end along the arc track 25.

[0052] Reference Attachment Figure 9-14 , side suction mode, the bearing shell 14 is horizontal, and the movable part 17 is tilted as a whole (the return spring is compressed, the control spring is compressed, the multi-stage gas spring 22 is compressed, the torsion spring is compressed, and the two ends of the male plate 45 and the female plate 46 tend to be close to the movable part 17); top suction mode, the bearing shell 14 and the movable part 17 are both horizontal (the return spring is further compressed, the control spring is compressed, and the multi-stage gas spring 22 is further compressed);

[0053] When the side suction mode is switched to the top suction mode, when the separation grate 39 is about to be horizontal, the male plate 45 and the female plate 46 on both sides are respectively limited by the top block 44, and the torsion spring is forced to be further compressed. The male plate 45 and the female plate 46 respectively rotate around the rotation axis 48. The male plate 45 and the female plate 46 are roof-shaped with a bulge in the middle. At this time, when the oil in the oil smoke is initially separated, it adheres to the separation grate 39 and can slide to both sides under the action of the grid-shaped male plate 45 and the female plate 46, and enter the oil cup 18 through the guidance of the guide groove 49.

[0054] Reference Attachment Figure 15 In any of the above embodiments, in the side suction state, the top strip 40 fills the slide groove, and in the top suction state, the top strip 40 sinks into the placement groove 13, so that the bottom surface of the supporting shell 14 remains flat in the side suction state and oil will not accumulate.

[0055] In addition, no matter in the side suction state or the top suction state, the air inlet of the centrifugal fan is always perpendicular to the sealing plate 19, vertically absorbing the oil smoke, making it difficult for the oil smoke to escape.

[0056] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0057] The above content is merely an example and explanation of the structure of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the scope of protection of the present invention.

Claims

1. A range hood with switchable side suction and top suction modes, characterized by: The invention comprises a bearing shell and a movable part, wherein a fixing frame is fixedly provided on a side of the bearing shell away from the movable part, the bearing shell is slidably connected to the movable part, a separation grate is detachably mounted on a side of the movable part away from the bearing shell, and an oil cup is detachably mounted on one side of the movable part; a sealing plate is provided between the separation grate and the bearing shell, the sealing plate is fixedly connected to the movable part, and a centrifugal fan is detachably mounted on the sealing plate; The centrifugal fan includes a motor housing, an arc-shaped track is fixedly provided on one side of the fixing frame, the motor housing is slidably arranged in the arc-shaped track, a motor is fixed in the motor housing, an impeller is fixed on the output shaft of the motor, the impeller is rotatably arranged in the volute, a mounting ring is fixed on the sealing plate, the volute is detachably mounted on the mounting ring, and a smoke exhaust pipe is fixedly provided on one side of the air outlet of the volute; a placement space is provided in the fixing frame, one end of the arc-shaped track extends into the placement space and is fixedly connected to an inner wall of one side of the placement space, and a sleeve is respectively provided on both sides of the arc-shaped track; one end of the sleeve is fixedly connected to an inner wall of one side of the placement space, and a connecting rod is slidably provided on the side of each sleeve close to the arc-shaped track, a control spring is provided in the sleeve, one end of the control spring is fixedly connected to the sleeve, and the other end of the control spring is fixedly connected to the connecting rod; a trapezoidal block is fixedly provided on the end of each connecting rod away from the sleeve, the trapezoidal block is slidably connected to the arc-shaped track, and two trapezoidal blocks are respectively located on both sides of the arc-shaped track.

2. The range hood with switchable side suction and top suction modes according to claim 1, characterized in that: A slide bar is fixedly provided on one side of the movable part close to the supporting shell, and a slide groove adapted to the slide bar is provided on the supporting shell; a handle is provided on one side of the slide bar, and the handle is fixedly connected to the sealing plate, and a limiting groove is provided on the supporting shell, and the handle slides in the limiting groove.

3. The range hood with switchable side suction and top suction modes according to claim 2, characterized in that: A connecting piece is fixedly provided on the side of the movable part close to the oil cup, a mounting pin is fixedly provided on the end of the connecting piece away from the movable part, an oil cup holder is fixedly provided on one side of the oil cup, a blind hole is provided on one side of the oil cup holder, and the oil cup holder is detachably mounted on the mounting pin; a plurality of oil dripping ports are fixedly provided on the side of the separation grate close to the oil cup.

4. The range hood with switchable side suction and top suction modes according to claim 3, characterized in that: The oil cup holder is rotatably connected to the mounting pin, and the oil cup is fixedly provided with an alignment groove, which corresponds to the connecting piece. A T-bar is fixedly provided at one end of the oil cup holder, and a control block is slidably provided on the T-bar. A multi-stage gas spring is provided on the side of the control block away from the oil cup holder, and a slider is fixedly provided at one end of the multi-stage gas spring, and the slider is slidably set on a slide rail, and the slide rail is fixedly connected to the fixed frame; the sliding trajectory of the slider along the slide rail, the telescopic trajectory of the multi-stage gas spring, and the sliding trajectory of the control block along the T-bar are respectively perpendicular to each other in different planes.

5. The range hood with switchable side suction and top suction modes according to claim 4, characterized in that: The separation grate includes a male plate, a female plate and a plate frame. A pair of blind holes are fixedly provided on the side of the plate frame close to the oil cup and the side away from the oil cup. A rotating shaft is detachably installed in the pair of blind holes of the plate frame. The male plate and the female plate are respectively rotatably connected to the rotating shaft; the male plate and the female plate are in a grid shape.

6. The range hood with switchable side suction and top suction modes according to claim 5, characterized in that: A guide groove is fixedly provided on the side of the male plate and the female plate away from each other, and the depth of the guide groove away from the oil cup is greater than the depth of the guide groove close to the oil cup; a top block is fixedly provided on both sides of the bearing shell.

7. The range hood with switchable side suction and top suction modes according to claim 6, characterized in that: Two torsion springs are provided on the rotating shaft. The two torsion springs are respectively located at two ends of the rotating shaft. The two torsion springs are respectively used to control the male plate and the female plate.

8. The range hood with switchable side suction and top suction modes according to claim 2, characterized in that: A top strip is detachably installed in the slide groove, a placement groove is fixedly provided on the bearing shell, the top strip is slidably arranged in the placement groove, a return spring is detachably installed in the placement groove, one end of the return spring is fixedly connected to the placement groove, the other end of the return spring is fixedly connected to the top strip, and a transition surface is formed on one end of the top strip close to the sealing plate.

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