Smoke deflector and range hood with same

Abstract

The invention relates to the technical field of range hoods, in particular to a smoke deflector and a range hood with the smoke deflector, the smoke deflector comprises a plate body, the plate body is provided with a smoke suction adjusting area protruding out of the plane where the plate body is located, and the smoke suction adjusting area is located in the smoke suction adjusting area. A negative pressure adjusting hole used for adjusting the adsorption pressure of the smoke suction adjusting area is formed in the smoke suction adjusting area. The smoke guide plate is improved, the smoke suction adjusting area is arranged in the middle of the smoke guide plate, on one hand, the smoke suction adjusting area can slow down the speed and impact force of oil smoke reaching the smoke guide plate and reduce the diffusion range of the oil smoke, on the other hand, the negative pressure adjusting hole is formed in the middle, suction of the oil smoke in the middle is achieved, and the suction effect of the oil smoke is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of range hoods, and more particularly to a smoke guide plate and a range hood with the smoke guide plate. Background Art

[0002] The main function of a range hood is to extract cooking fumes through negative pressure, maintaining clean kitchen air. Existing range hoods typically include a smoke collection duct with a built-in fan assembly, a filter, a control system, and other components. A smoke collection chamber is located below the smoke collection duct, collecting fumes before exhausting them through the duct. However, this smoke collection chamber design significantly increases the size of the range hood and is less aesthetically pleasing.

[0003] At present, in the existing technology, a smoke guide plate is arranged below the oil smoke channel, and the structure of the smoke collecting cavity is replaced by a plate. This is simpler and more beautiful, and also reduces the size and cost of the range hood.

[0004] However, the current smoke guide plate mostly adopts a flat plate, which is not conducive to the efficient introduction of oil smoke into the smoke collection channel, and may even interfere with the introduction of oil smoke, making it easier for oil smoke to be dispersed around, thereby greatly reducing the smoking efficiency. Summary of the Invention

[0005] The purpose of the present invention is to solve the above-mentioned problems existing in the smoke guide plate of the range hood and to provide a smoke guide plate for use in a non-cavity range hood, which can greatly improve the smoking efficiency.

[0006] The first aspect of the present invention provides a smoke guide plate, which adopts the following technical solution: A smoke guide plate comprises a plate body, a smoking adjustment area protruding from the plane of the plate body is provided on the plate body, and a negative pressure adjustment hole for adjusting the adsorption pressure of the smoking adjustment area is opened in the smoking adjustment area.

[0007] Preferably, the smoking adjustment area is a concave area formed by the middle of the plate body being concave toward one side of the upper surface of the smoke guide plate, or a convex area formed by the middle of the plate body being concave away from one side of the upper surface of the smoke guide plate, and the smoking adjustment area includes a top wall and two side walls.

[0008] Preferably, on the concave area, the negative pressure regulating hole is opened on the top wall.

[0009] Preferably, on the convex area, the negative pressure regulating hole is opened on the side wall.

[0010] Preferably, the distance between the two side walls of the smoking adjustment area gradually increases from the top wall to the distal end of the smoking adjustment area.

[0011] Preferably, the negative pressure regulating hole is in the shape of an elongated strip and is arranged along the length direction of the smoking regulating area.

[0012] Preferably, the top wall of the smoking adjustment area is inclined, and the height of the top wall gradually decreases from the front end to the rear end.

[0013] Preferably, both sides and the front side of the plate body face upwards of the plate body and have arc-shaped guide edges extending from the edges of the plate body toward the middle.

[0014] The present invention also provides a range hood, in particular an ultra-thin range hood, using the above-mentioned smoke guide plate.

[0015] The range hood includes a smoke collecting chamber, a main board, an oil filter and the smoke guide plate. The smoke collecting chamber has an inlet located at the lower end and an exhaust port located at the top end. The main board is installed at the inlet of the smoke collecting chamber. The smoke guide plate is installed below the main board. A negative pressure adsorption port is formed between the smoke guide plate and the main board for smoke to flow into the smoke collecting chamber.

[0016] Preferably, the main board and the smoke guide plate are connected via a connecting structure, and the connecting structure includes: The upper base comprises a locking portion, a rotating portion, and a base body connecting the locking portion and the rotating portion; The lower topological member includes a front supporting portion, a rear supporting portion, and a topological body connecting the front supporting portion and the rear supporting portion; The front support portion and the locking portion are detachably connected, the rear support member and the rotating portion are rotationally connected, and after the front support portion and the locking portion are disengaged from each other, the relative position between the lower topological member and the upper base can be changed by adjusting the connection position between the rear support member and the rotating portion.

[0017] Preferably, the rotating portion is formed with a slot that can be inserted into the rear supporting portion, and guide slots are provided on both side walls of the slot. The rear supporting portion is slidably connected to the guide slots via a rotating rod that passes through the slot transversely.

[0018] Preferably, the guide groove has a first rotation center and a second rotation center, and there is a smooth transition from the first rotation center to the second rotation center, and the vertical position of the first rotation center is higher than the vertical position of the second rotation center.

[0019] Preferably, a limiting boss is provided at the front end of the guide groove.

[0020] Preferably, a locking component is provided in the locking portion, and a locking top for cooperating with the locking component to implement detachable locking is provided on the top of the front supporting portion.

[0021] Preferably, the locking component includes a locking block embedded in the locking groove of the locking portion, the locking block is provided with a main channel in the vertical direction and side channels in the horizontal direction on both sides of the main channel, the side channel is provided with an extrusion member and an elastic member located behind the extrusion member, and the locking top of the front support portion is locked by the force exerted by the elastic member on the extrusion member.

[0022] Preferably, the extrusion member includes an extrusion head at the front end, a limit platform at the rear end, and a connecting area connected between the extrusion head and the limit platform, and the opening diameter of the side channel is larger than the diameter of the connecting area and smaller than the diameter of the limit platform.

[0023] Preferably, the active surface of the extrusion head is a spherical surface.

[0024] Preferably, the locking top includes a pointed head and a neck located below the pointed head, the neck is connected to the front support part, the pointed head gradually widens from the top to close to the neck, and a limiting platform is formed at the connection position between the pointed head and the neck.

[0025] Preferably, a front connecting portion is provided between the front supporting portions of the two lower topological members.

[0026] Preferably, a ridge protruding upward is provided in the middle of the front connecting portion.

[0027] Preferably, a negative pressure regulating strip is provided on the oil filter net, and the projection position of the negative pressure regulating strip corresponds to the smoking regulating area (the projection position just covers or the projection area is larger than the area where the smoking regulating area is located).

[0028] By implementing the above technical solution, the present invention has the following beneficial effects: 1. The present invention improves the smoke guide plate of the ultra-thin range hood and sets a smoke adjustment area in the middle of the smoke guide plate. On the one hand, this area can slow down the speed and impact force of the smoke reaching the smoke guide plate and narrow the diffusion range of the smoke. On the other hand, a negative pressure adjustment hole is set in the middle to realize the suction of the middle smoke, which will greatly improve the absorption effect of the smoke.

[0029] 2. The present invention also provides a guide edge on the edge of the smoke guide plate, which is beneficial to reducing the dispersion of oil smoke and thus improving the absorption effect of oil smoke.

[0030] 3. The present invention optimizes the structure of the connecting components between the main board and the smoke guide plate, forms multiple negative pressure areas between the main board and the smoke guide plate, and optimizes the distribution of negative pressure in each negative pressure area to improve smoking efficiency.

[0031] 4. The present invention improves the connection structure of the smoke guide plate so that the smoke guide plate does not interfere with the rear end plate of the main plate when rotating.

[0032] 5. By optimizing the structure of the oil filter, the oil smoke can be quickly guided into the smoke collection channel when it reaches the oil filter, and the speed and impact force of the oil smoke when reaching the oil filter are reduced, greatly reducing the suction noise of the oil smoke. At the same time, the grease on the oil filter can be drained to both sides, avoiding large-scale accumulation and blockage of grease in the central area. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive effort. In the accompanying drawings: Figure 1 This is a schematic structural diagram of the smoke guide plate shown in Example 1 of the present invention; Figure 2 Schematic cross-sectional view of the smoke guide plate in Example 1; Figure 3 This is a schematic structural diagram of a range hood according to embodiment 1 of the present invention; Figure 4 This is a schematic structural diagram of the connection structure of Example 1 of the present invention; Figure 5 Schematic diagram of the structure of the lower topological component in Example 1 of the present invention; Figure 6 Schematic diagram of the structure of the upper base in Example 1 of the present invention; Figure 7 Schematic diagram of the guide groove of the upper base in Example 1 of the present invention; Figure 8 Schematic diagram of the structure of the extrusion member in Example 1 of the present invention; Figure 9 This is a state diagram of the smoke guide plate of the present invention below the first rotation center; Figure 10 This is a state diagram of the smoke guide plate of the present invention below the second rotation center; Figure 11 This is a schematic structural diagram of the oil filter in Example 1 of the present invention; Figure 12 for Figure 11 A top view of the oil filter; Figure 13 Schematic diagram of the structure of the smoke guide plate in Example 2 of the present invention; Figure 14 This is a rear view of the smoke guide plate in Example 2 of the present invention. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0035] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly mentioned in this specification are defined relative to the configuration or usage scenarios of the range hood as shown in the accompanying drawings, and may vary depending on the location or usage of the range hood. Therefore, these or other directional terms should not be construed as restrictive. Example 1

[0036] First, this embodiment provides a smoke guide plate, including a plate body 400, see Figure 1 、 Figure 2 A concave area formed in the middle of the plate 400, facing the upper surface of the smoke guide plate (that is, the side facing the smoke collection channel during use), protrudes beyond the plane of the plate 400. This area, known as the smoke adjustment area 402, comprises a top wall and two side walls. A negative pressure adjustment hole 402a is provided in the top wall for adjusting the adsorption pressure of the smoke adjustment area 402. The top wall is inclined, gradually descending from the front (the side located at the front of the range hood during use) to the rear (the side located at the rear of the range hood during use). Furthermore, the top wall is concave, forming a slightly curved groove. The grooves are located on either side of the negative pressure adjustment hole 402a, forming lower oil flow channels. Condensed oil flows along these channels to the oil collection tank at the rear. When the oil smoke reaches the smoke guide plate, its velocity is very high, which makes it easily dispersed and dispersed over a wider area, resulting in poor oil fume extraction. The setting of the concave area 402 can slow down the speed of the oil smoke when it reaches the smoke guide plate and reduce the diffusion range. At the same time, the concave area 402 can also collect the oil smoke and draw it in with the help of the negative pressure effect at the negative pressure adjustment hole 402a, cooperating with the negative pressure adsorption port to achieve efficient suction of the oil smoke.

[0037] Secondly, this embodiment also provides a range hood, which adopts the above-mentioned smoke guide plate. The structure of the range hood is shown in FIG. Figure 3 The smoke collection chamber 100 is located at the top, with a smoke inlet at the bottom and a smoke outlet at the top. A fan assembly is located within the smoke collection chamber 100 to generate negative pressure, a structure similar to that used in the prior art. An oil filter 200 is installed at the outlet of the smoke collection chamber 100 to filter out oil from the smoke entering the chamber.

[0038] The range hood of this embodiment further includes a mainboard 300, which is mounted at the entrance of the smoke collection chamber 100. The mainboard 300 comprises a top panel 301, a front panel 302, and a rear panel 303. An opening is provided in the middle of the top panel 301, corresponding to the entrance of the smoke collection chamber 100. The front panel 302 houses a control assembly 304, and an oil collection trough 305 is fixedly mounted at the lower end of the rear panel 303.

[0039] The smoke guide plate is located below the top plate 301 of the main plate 300 and is connected to the main plate 300 via a connecting structure 500. This creates a negative pressure suction port 401 between the smoke guide plate and the main plate 300, allowing smoke to flow into the smoke collection chamber 100. The negative pressure suction ports 401 primarily include a front negative pressure suction port, a left negative pressure suction port, and a right negative pressure suction port (front, left, and right are defined with the front plate as the front). The rear end of the smoke guide plate overlaps the edge of the oil collection tank 305, and the end extends directly above the oil collection tank 305 to direct oil residue from the smoke guide plate into the oil collection tank 305 for collection. Lips are provided on the front, left, and right edges of the smoke guide plate to prevent oil residue from dripping from these three sides.

[0040] In this embodiment, the structure of the connection structure 500 is specially designed, see Figure 4 The connection structure 500 consists of two parts: an upper base 501 and a lower topological member 502. The upper base 501 is fixedly connected to the lower surface of the top plate 301 of the main board 300. There are two upper bases 501, located near the left and right sides of the top plate 301. The material of the upper base 501 and the lower topological member 502 can be the same as or different from that of the smoke deflector or the main board 300. The surfaces of the upper base 501 and the lower topological member 502 are smooth to prevent the smoke from changing direction when it collides with these structures, thereby reducing the adsorption effect.

[0041] See also Figure 5 Two lower topological components 502 are also provided, corresponding to the upper base 501. Each lower topological component 502 includes two rear support portions 5021 located on the rear side, a front support portion 5022 located on the front side, and a topological body 5023 located between the rear support portions 5021 and the front support portions 5022. The height of the front support portions 5022 and the rear support portions 5021 should be greater than the height of the topological body 5023 to form a certain distance between the top plate 301 of the main board and the smoke guide plate, thereby forming a negative pressure area. On the one hand, the lower topological component 502 serves as a connection between the upper base 501 and the smoke guide plate, and cooperates with the upper base 501 to control the distance between the top plate 301 and the smoke guide plate. On the other hand, it adjusts the distribution of negative pressure at the negative pressure adsorption port 401.

[0042] In addition, a front connecting portion 5024 is provided between the front supporting portions 5022 of the two lower topological members 502. The topological body 5023 and the rear supporting portion 5021, and the front connecting portion 5024 and the front supporting portion 5022 are in contact with each other, and may be connected or not, and may be separate or integrated.

[0043] The structure of the above-mentioned lower topological component 502 and the upper base 501 forms a front negative pressure adsorption port, a left negative pressure adsorption port and a right negative pressure adsorption port between the top plate 301 and the smoke guide plate, and separates each adsorption port by the rear support part 5021 and the front support part 5022, which is conducive to the concentration of negative pressure at each adsorption port position.

[0044] In one embodiment, the center of the front connecting portion 5024 is provided with an upwardly protruding ridge 5024a, which gradually increases in height from both ends to the center. The provision of this ridge 5024a further optimizes the negative pressure at the front negative pressure adsorption port, increasing the negative pressure locally while simultaneously reducing it elsewhere. This optimizes the negative pressure adsorption of oil fumes, reduces their diffusion, and enhances the concentrated adsorption effect.

[0045] In one embodiment, the front support portion 5022 is generally cylindrical, with its top end inserted into a socket on the upper base 501 for connection, and its bottom end fixedly connected or integrally connected to the smoke deflector. The diameter of the front support portion 5022 gradually increases from top to bottom, which helps further optimize the negative pressure of the negative pressure adsorption port.

[0046] In one embodiment, see Figure 6 The upper base 501 includes a locking portion 5011 located at the front, a rotating portion 5012 located at the rear, and a base body 5013. The rotating portion 5012 is connected to the rear support portion 5021 of the lower topological member 502, and the locking portion 5011 is connected to the front support portion 5022 of the lower topological member 502. The rotating portion 5012 includes two connecting pieces, with a slot 5012a formed between the two connecting pieces to be inserted into the rear support portion 5021 of the lower topological member 502. A guide groove 5012b is formed on the inner side wall of the connecting piece, and a through hole is formed in the rear support portion 5021. The rotating rod 5021a passes through the through hole to achieve sliding connection with the guide groove 5012b.

[0047] In one embodiment, the height of the base body 5013 gradually decreases from the two ends to the middle, presenting a structure that is low in the middle and high at both ends. This is conducive to cooperating with the lower topological component 502 to achieve a better negative pressure distribution effect, making the negative pressure in the core area more concentrated.

[0048] See also Figure 7The guide groove 5012b includes a first rotation center 5012b-1 and a second rotation center 5012b-2. The vertical position of the first rotation center 5012b-1 is higher than the vertical position of the second rotation center 5012b-2. There is a smooth transition from the first rotation center 5012b-1 to the second rotation center 5012b-2. The height of the support position of the guide groove 5012b for the rotating rod 5021a gradually decreases, and a limiting boss 5012c is set at the notch position of the guide groove 5012b.

[0049] The locking portion 5011 of the upper base 501 and the front support portion 5022 of the lower topological member 502 are detachably connected. A locking groove 5011a is provided on the locking portion 5011, and a locking component 503 is arranged in the groove. The locking component 503 includes a locking block 5031 embedded in the locking groove 5011a of the locking portion 5011, and the locking block 5031 is provided with a vertical main channel 5031a and horizontal side channels 5031b located on both sides of the main channel 5031a. The side channel 5031b is provided with an extrusion member 5031c and an elastic member 5031d located behind the extrusion member 5031c. The front support portion 5022 is locked by the force exerted by the elastic member 5031d on the extrusion member 5031c.

[0050] See also Figure 8 The extrusion member 5031c includes an extrusion head 5031c-1 at the front end, a limit platform 5031c-2 at the rear end, and a connecting area 5031c-3 connected between the extrusion head 5031c-1 and the limit platform 5031c-2. The opening diameter of the side channel 5031b is larger than the diameter of the connecting area 5031c-3 and smaller than the diameter of the limit platform 5031c-2. The active surface of the extrusion head 5031c-1 is a spherical surface.

[0051] The top of the front support part 5022 has a locking top 5022a to cooperate with the locking part 5011. The locking top 5022a includes a pointed head 5022a-1 and a neck 5022a-2 located below the pointed head 5022a-1. The neck 5022a-2 is connected to the main part of the front support part 5022. The pointed head 5022a-1 gradually widens from the top to close to the neck 5022a-2, and the cross-section is triangular. A limiting platform 5022a-3 is formed at the connection position between the pointed head 5022a-1 and the neck 5022a-2.

[0052] During installation, push the smoke guide plate upward with a little force, and the locking top 5022a of the front support part 5022 is inserted into the main channel 5031a and passes through the extrusion part 5031c. The extrusion head 5031c-1 of the extrusion part 5031c is located below the limiting platform 5022a-3 of the locking top 5022a. At this time, the extrusion part 5031c is squeezed on the neck 5022a-2 under the action of the elastic part 5031d. Due to the existence of the limiting platform 5022a-3, the locking top 5022a will not separate from the extrusion part 5031c, thereby ensuring the stable installation of the smoke guide plate.

[0053] When disassembling, press down the smoke guide plate slightly. At this time, since the active surface of the extrusion head 5031c-1 is a spherical surface, under the action of external force, the locking top 5022a can squeeze the extrusion head 5031c-1 inward to squeeze the elastic part 5031d, thereby making the locking top 5022a separate from the extrusion head 5031c-1, and then disassemble the front support part 5022 and the locking part of the upper base 501.

[0054] Since the rear end of the smoke guide plate needs to bear the oil collecting tank 305, when the smoke guide plate is rotated to adjust its angle or when the smoke guide plate is disassembled, it will cause interference with the rear end plate 303. The connection structure in this embodiment avoids interference between the smoke guide plate and the rear end plate 303 when the smoke guide plate is rotated. During operation, first press down the front end of the smoke guide plate with a little force so that the front support part 5022 is separated from the locking part 5011 of the upper base 501. At this time, under the action of the gravity of the smoke guide plate, or under the external force of the operator, the rotating rod is driven from the first rotation center along the guide groove forward and downward to the second rotation center, so that the smoke guide plate can be rotated at will without interference from the rear end plate 303 and the oil collecting tank 305. See the state diagram under the first rotation center for details. Figure 9 , the state diagram under the second rotation center is shown in Figure 10 .

[0055] The height of the topological body 5023 of the lower topological member 502 gradually decreases from the ends to the middle. The height of the ends is greater than the height of the middle portion. This arrangement can provide targeted distribution of the negative pressure of the negative pressure adsorption ports 401 on the side, increasing the local (central) negative pressure and improving the side's flue gas adsorption efficiency.

[0056] In this embodiment, the lower topological component 502 and the upper base 501 are hollow structures, which can save materials, reduce weight, and make the smoke intake system more lightweight.

[0057] In another embodiment, the structure of the oil filter 200 includes a body, see Figure 11The main body includes two left and right meshes 201 and a negative pressure regulating strip 202 connecting the two meshes 201. The negative pressure regulating strip 202 is long and runs from the front panel 302 to the rear panel 303 of the range hood, located in the middle of the main body. The two meshes 201 are symmetrical about the negative pressure regulating strip 202. The two meshes 201 are respectively connected to the two side edges of the negative pressure regulating strip 202 in the longitudinal direction, and an angle α is formed between the meshes that is less than 180° and greater than 90°. Preferably, α is greater than 150° and less than 180°. If the angle is too large, it will not be able to gather the oil smoke. If it is too small, it will block the entry of oil smoke and reduce the smoke extraction effect.

[0058] The oil filter net set up in this way can gather the oil smoke that is sucked up, so that when the oil smoke reaches the oil filter net, it can be quickly guided into the smoke collection channel. At the same time, the structure designed in this way reduces the speed and impact force of the oil smoke when it reaches the oil filter net, which not only reduces the degree to which the oil smoke is dispersed, but also greatly reduces the suction noise of the oil smoke. Moreover, this structure can also guide the grease on the oil filter net to both sides, avoiding the accumulation of a large amount of grease in the central area, and preventing the grease from clogging in the central area. The projection position of the middle negative pressure adjustment strip 202 corresponds to the negative pressure adjustment hole on the convex area, that is, the negative pressure adjustment strip 202 is located directly above the negative pressure adjustment hole, which can prevent grease from dripping into the negative pressure adjustment hole.

[0059] In this embodiment, see Figure 12 The mesh of the mesh body 201 is diamond-shaped, and a diagonal line of the diamond-shaped mesh is parallel to the negative pressure adjustment strip 202. Example 2

[0060] The difference between this embodiment and embodiment 1 is that, in another implementation mode of this embodiment, see Figure 13 、 14 The convex area formed by the concave side of the middle part of the plate away from the upper surface of the smoke guide plate is also called the smoke adjustment area 402, which includes a top wall and two side walls. Negative pressure adjustment holes 402a are provided on the two side walls for adjusting the adsorption pressure of the smoke adjustment area. The upper surface of the convex part 403 is concave to form a dirty oil flow channel. The convex part is set at an angle, pointing from the front end plate 302 to the rear end plate 303, and the height of the upper surface of the convex area gradually decreases so that the oil in the dirty oil channel can be smoothly discharged into the oil collecting tank. The convex part, like the concave area, can also slow down the speed of the oil smoke when it reaches the smoke guide plate and reduce the diffusion range. However, if the negative pressure adjustment hole is opened on the convex area, the same as the position of the concave area, it will not be possible to achieve efficient absorption of the oil smoke. However, if the position is set on the two side walls of the convex area, the expected effect can be achieved.

[0061] Finally, it should be noted that the above implementation cases are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above implementation cases, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above implementation cases, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the implementation cases of the present invention.

Claims

1. A smoke guide plate, characterized in that: The invention comprises a plate body, wherein a smoking adjustment area (402) protruding from the plane of the plate body (400) is provided on the plate body (400), and a negative pressure adjustment hole (402a) for adjusting the adsorption pressure of the smoking adjustment area (402) is opened in the smoking adjustment area (402).

2. The smoke guide plate according to claim 1, characterized in that: The smoking adjustment area is a concave area formed by the middle of the plate body (400) being concave toward one side of the upper surface of the smoke guide plate, or a convex area formed by the middle of the plate body (400) being concave away from one side of the upper surface of the smoke guide plate. The smoking adjustment area (402) includes a top wall and two side walls.

3. The smoke guide plate according to claim 2, characterized in that: The distance between the two side walls of the smoking adjustment area (402) gradually increases from the top wall to the distal end of the smoking adjustment area (402).

4. The smoke guide plate according to claim 1, characterized in that: The negative pressure regulating hole (402a) is in the shape of an elongated strip and is arranged along the length direction of the smoking regulating area (402).

5. The smoke guide plate according to claim 2, characterized in that: The top wall of the smoking adjustment area (402) is arranged obliquely, and the height of the top wall gradually decreases from the front end to the rear end.

6. The smoke guide plate according to claim 1, characterized in that: Both sides and the front side of the plate body (400) face upwards of the plate body (400) and extend from the edges of the plate body (400) toward the middle.

7. A range hood, characterized in that: The invention comprises the smoke guide plate according to any one of claims 1 to 6.

8. The range hood according to claim 7, characterized in that: The smoke collecting chamber (100) comprises a smoke collecting chamber (100), a main board (300), an oil filter (200), and the smoke guide plate. The smoke collecting chamber (100) has an inlet at the lower end and an outlet at the top end. The main board (300) is installed at the inlet of the smoke collecting chamber (100). The smoke guide plate is installed below the main board (300). A negative pressure adsorption port (401) is formed between the smoke guide plate and the main board (300) for allowing smoke to flow into the smoke collecting chamber (100).

9. The range hood according to claim 8, characterized in that: The main board (300) and the smoke guide plate are connected via a connecting structure (500), and the connecting structure (500) comprises: An upper base (501) comprises a locking portion (5011), a rotating portion (5012), and a base body (5013) connecting the locking portion (5011) and the rotating portion (5012); The lower topological member (502) comprises a front supporting portion (5022), a rear supporting portion (5021), and a topological body (5023) connecting the front supporting portion (5022) and the rear supporting portion (5021); The front support portion (5022) and the locking portion (5011) are detachably connected, the rear support member (5021) and the rotating portion (5012) are rotationally connected, and after the front support portion (5022) and the locking portion (5011) are disengaged from each other, the relative position between the lower topological member (502) and the upper base (501) is changed by adjusting the connection position between the rear support portion (5021) and the rotating portion (5012).

10. The range hood according to claim 9, characterized in that: The rotating portion (5012) is formed with a slot (5012a) that can be inserted into the rear support portion (5021), and guide slots (5012b) are provided on both side walls of the slot (5012a), and the rear support portion (5021) is slidably connected to the guide slots (5012b) via a rotating rod (5021a) that passes through the slot in a transverse direction.

11. The range hood according to claim 10, characterized in that: The guide groove (5012b) has a first rotation center (5012b-1) and a second rotation center (5012b-2), and a smooth transition occurs from the first rotation center (5012b-1) to the second rotation center (5012b-2), wherein the vertical position of the first rotation center (5012b-1) is higher than the vertical position of the second rotation center (5012b-2).

12. The range hood according to claim 10, characterized in that: A locking component (503) is provided in the locking portion (5011), and a locking top portion for cooperating with the locking component (503) to implement detachable locking is provided on the top of the front supporting portion (5022).

13. The range hood according to claim 10, characterized in that: The locking component (503) comprises a locking block (5031) embedded in a locking groove of the locking portion (5011); the locking block (5031) is provided with a vertical main channel (5031a) and horizontal side channels (5031b) located on both sides of the main channel (5031a); an extrusion member (5031c) and an elastic member (5031d) located behind the extrusion member (5031c) are provided in the side channel (5031b); the locking top of the front support portion (5022) is locked by the force exerted by the elastic member (5031d) on the extrusion member (5031c).

14. The range hood according to claim 13, characterized in that: The extrusion piece (5031c) comprises an extrusion head (5031c-1) at the front end, a limiting platform (5031c-2) at the rear end, and a connecting area (5031c-3) connected between the extrusion head (5031c-1) and the limiting platform (5031c-2); the opening diameter of the side channel (5031b) is larger than the diameter of the connecting area (5031c-3) and smaller than the diameter of the limiting platform (5031c-2).

15. The range hood according to claim 12, characterized in that: The locking top (5022a) includes a pointed head (5022a-1) and a neck (5022a-2) located below the pointed head (5022a-1), the neck (5022a-2) is connected to the front support portion (5022), the pointed head (5022a-1) gradually widens from the top to the neck (5022a-2), and a limiting platform (5022a-3) is formed at the connection position between the pointed head (5022a-1) and the neck (5022a-2).

16. The range hood according to claim 10, characterized in that: A negative pressure regulating strip is provided on the oil filter net, and the projection position of the negative pressure regulating strip corresponds to the smoking regulating area.

Images