A smoke guide plate for a range hood and a range hood

Abstract

This utility model relates to the field of range hood technology, and more specifically to a smoke guide plate for a range hood. The smoke guide plate includes a plate body, on which a smoke extraction adjustment area protruding beyond the plane of the plate body is provided. A negative pressure adjustment hole is provided in the smoke extraction adjustment area for adjusting the adsorption pressure of the smoke extraction adjustment area. This utility model improves the smoke guide plate by providing a smoke extraction adjustment area in the middle of the plate. This area, on the one hand, slows down the speed and impact of the fumes reaching the smoke guide plate, reducing the diffusion range of the fumes; on the other hand, the negative pressure adjustment hole in the middle enables the suction of fumes in the middle, which greatly improves the absorption effect of the fumes.

Description

Technical Field

[0001] This utility model relates to the field of range hood technology, and more specifically to a smoke guide plate for a range hood and a range hood. Background Technology

[0002] The main function of a range hood is to use negative pressure to extract cooking fumes, keeping the kitchen air clean. Existing range hoods typically include a built-in fan assembly, a smoke collection duct, a filter, and a control system. Below the smoke collection duct is a smoke collection chamber where cooking fumes are collected and then discharged through the duct. However, this smoke collection chamber design significantly increases the size of the range hood and is not aesthetically pleasing.

[0003] Currently, in existing technologies, a smoke guide plate is placed below the fume duct, using a plate to replace the structure of the smoke collection chamber. This is simpler, more aesthetically pleasing, and also reduces the size and cost of the range hood.

[0004] However, most current smoke guide plates are made of a flat plate, which is not conducive to the efficient introduction of oil fumes into the smoke collection channel. It may even interfere with the introduction of oil fumes, making them more easily dispersed to the surroundings, thus greatly reducing the smoke extraction efficiency. Utility Model Content

[0005] The purpose of this invention is to solve the aforementioned problems of the smoke guide plate in range hoods and to provide a smoke guide plate for use in non-cavity range hoods, which can greatly improve smoke extraction efficiency.

[0006] The first aspect of this utility model is to provide a smoke guide plate, which adopts the following technical solution: A smoke guide plate includes: a plate body having a front surface facing the gas stove and a back surface located on the opposite side of the front surface; the front surface is provided with a deceleration structure for slowing down the speed at which oil fumes diffuse to the surroundings when they reach the front surface; the deceleration structure is a protruding structure or a recessed structure formed on the front surface in a strip-like or dot-like distribution.

[0007] Preferably, the deceleration structure is a plurality of protruding or recessed structures formed on the front surface in a strip-like distribution, and the plurality of protruding or recessed structures are parallel to each other.

[0008] Preferably, the deceleration structure is a plurality of strip-shaped protrusions formed on the front surface, the plurality of protrusions being parallel to each other and parallel to the edge of the smoke guide plate.

[0009] Preferably, a smoking adjustment area protruding beyond the plane of the plate is provided on the plate body, and a negative pressure adjustment hole for adjusting the adsorption pressure of the smoking adjustment area is provided in the smoking adjustment area.

[0010] Preferably, the smoking adjustment area is a concave area formed by the indentation of the middle part of the plate towards the upper surface of the smoke guide plate, or a convex area formed by the indentation of the middle part of the plate away from the upper surface of the smoke guide plate. The smoking adjustment area includes a top wall and two side walls.

[0011] Preferably, the negative pressure adjustment hole is located on the top wall of the concave region.

[0012] Preferably, the negative pressure adjustment hole is located on the side wall of the convex region.

[0013] Preferably, the distance between the two sidewalls of the smoking adjustment area gradually increases from the top wall of the smoking adjustment area to the far end.

[0014] Preferably, the negative pressure regulating hole is elongated and is arranged along the length of the smoking regulating area.

[0015] 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.

[0016] This utility model also provides a range hood that uses the above-mentioned smoke guide plate.

[0017] The range hood includes a smoke collection chamber, a main board, an oil filter, and a smoke guide plate. The smoke collection chamber has an inlet at the lower end and an outlet at the top. The main board is installed at the inlet of the smoke collection chamber, and 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 to allow smoke to flow into the smoke collection chamber.

[0018] By implementing the above technical solution, this utility model has the following beneficial effects: 1. This utility model provides a recessed or raised structure on the front surface of the smoke guide plate of the ultra-thin range hood. When the oil fumes reach the smoke guide plate and impact the plate to spread outwards, they will be affected by the recessed or raised structure, thereby changing the diffusion direction, slowing down the diffusion speed, and reducing the diffusion range of the oil fumes. This is beneficial to improving the absorption effect of oil fumes.

[0019] 2. This utility model improves the smoke guide plate by setting a smoke adjustment area in the middle of the smoke guide plate. This area can slow down the speed and impact of the oil fumes reaching the smoke guide plate and reduce the diffusion range of the oil fumes. On the other hand, a negative pressure adjustment hole is set in the middle to realize the suction of oil fumes in the middle, which will greatly improve the absorption effect of oil fumes. Attached Figure Description

[0020] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings: Figure 1 This is a schematic diagram of the smoke guide plate shown in one embodiment of the present invention; Figure 2 This is a schematic diagram of the smoke guide plate shown in another embodiment of the present invention; Figure 3 This is a schematic diagram of the smoke guide plate shown in another embodiment of the present invention; Figure 4 for Figure 3 A cross-sectional view of the smoke guide plate shown; Figure 5 This is a schematic diagram of the smoke guide plate shown in another embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of a range hood according to one embodiment of the present invention; Figure 7 This is a schematic diagram of the connection structure in Embodiment 1 of this utility model; Figure 8 This is a schematic diagram of the lower topology component in Embodiment 1 of this utility model; Figure 9 This is a schematic diagram of the upper base in Embodiment 1 of this utility model; Figure 10 This is a schematic diagram of the guide groove on the upper base in Embodiment 1 of this utility model; Figure 11 This is a schematic diagram of the extrusion component in Embodiment 1 of this utility model; Figure 12 This is a diagram showing the state of the smoke guide plate of this utility model under the first rotation center; Figure 13 This is a diagram showing the state of the smoke guide plate of this utility model under the second rotation center; Figure 14 This is a schematic diagram of the structure of the oil filter screen in Embodiment 1 of this utility model; Figure 15 for Figure 11 A top view of the oil filter screen. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0022] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this instruction manual are defined relative to the structure shown in the accompanying drawings or the usage scenario of the range hood. Therefore, they may vary depending on its location and usage. Consequently, these or other directional terms should not be interpreted as restrictive. Example 1

[0023] This embodiment provides a smoke guide plate 400, including a plate body, such as... Figure 1 As shown, the lower surface of the plate faces the gas stove. During cooking, the fumes rise under the negative pressure of the range hood, first contacting the front surface, with the back surface being the opposite side. In this embodiment, a deceleration structure is provided on the front surface, consisting of multiple strip-shaped protruding structures formed on the front surface, such as... Figure 2 As shown, multiple protruding structures are parallel to each other and parallel to the edge of the smoke guide plate.

[0024] See Figure 3 , Figure 4 A concave area, 402, is formed in the middle of the plate facing the upper surface of the smoke guide plate (i.e., the side facing the smoke collection channel during use), protruding beyond the plane of the plate. This area includes a top wall and two side walls. A negative pressure regulating hole 402a is provided on the top wall for adjusting the adsorption pressure of the smoke regulating area. The top wall is inclined, gradually decreasing in elevation from the front (located at the front end of the range hood during use) to the rear (located at the rear end of the range hood during use). Furthermore, the concave top wall forms a groove with a certain high arc, creating lower-positioned grease flow channels on both sides of the negative pressure regulating hole 402a. Condensed grease flows along these channels to the rear grease collection tank. When the fumes reach the smoke guide plate 400, their velocity is very high, making them easily dispersed over a wider area, resulting in poor fume extraction. The recessed area 402 can slow down the speed of the fumes when they reach the smoke guide plate 400, reducing the diffusion range. At the same time, the recessed area 402 can also collect the fumes and draw them in with the help of the negative pressure at the negative pressure regulating hole 402a. Together with the negative pressure adsorption port, it can achieve efficient fume extraction.

[0025] In another specific embodiment, see Figure 5The convex region, also known as the smoke-adjusting region 402, is formed by an indentation on the side of the plate away from the upper surface of the smoke guide plate. This region includes a top wall and two side walls. Negative pressure adjustment holes 402a are provided on the two side walls to adjust the adsorption pressure of the smoke-adjusting region. A sludge / oil flow channel is formed by a recess on the upper surface of the convex portion. The convex portion is inclined, pointing from the front end plate 302 to the rear end plate 303, with the height of the upper surface gradually decreasing to facilitate the drainage of oil from the sludge / oil channel into the oil collection tank. Like the concave region, the convex portion can also slow down the speed of oil fumes reaching the smoke guide plate 400, reducing the diffusion range. However, if the negative pressure adjustment holes are located on the convex region in the same position as the concave region, efficient absorption of oil fumes cannot be achieved. Setting the holes on the two side walls of the convex region achieves the desired effect.

[0026] Secondly, this embodiment also provides a range hood that uses the aforementioned smoke guide plate; the structure of this range hood is described in [reference needed]. Figure 6 The system includes an upper smoke collection chamber 100, which has a smoke inlet at the lower end and a smoke outlet at the top. A fan assembly is arranged within the smoke collection chamber 100 to provide power for generating negative pressure; this part of the structure is the same as that used in the prior art. An oil filter screen 200 is installed at the outlet of the smoke collection chamber 100 to filter the oil fumes entering the chamber.

[0027] The range hood in this embodiment also includes a main board 300, which is installed at the inlet of the smoke collection duct 100. The main board 300 includes a top plate 301, a front plate 302, and a rear plate 303. An opening is provided in the middle of the top plate 301, which corresponds to the inlet of the smoke collection duct 100. The front plate 302 has a built-in control component 304, and an oil collection trough 305 is fixedly installed at the lower end of the rear plate 303.

[0028] The smoke guide plate 400 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. A negative pressure adsorption port 401 is provided between the smoke guide plate 400 and the main plate 300 to allow smoke to flow into the smoke collection chamber 100. The negative pressure adsorption port 401 mainly includes a front negative pressure adsorption port, a left negative pressure adsorption port, and a right negative pressure adsorption port (here, front, left, and right are defined with the front end plate as the front). The rear end of the smoke guide plate 400 overlaps the edge of the oil collection tank 305, and its end extends directly above the oil collection tank 305 to guide the oil on the smoke guide plate 400 into the oil collection tank 305 for collection. Edges are provided on the front, left, and right edges of the smoke guide plate 400 to prevent oil from dripping from these three sides.

[0029] The guide plate 400 is connected to the main board 300 via a connecting structure 500, thus providing a negative pressure adsorption port 401 between the guide plate 400 and the main board 300 for the smoke to flow into the smoke collection cavity 100. The negative pressure adsorption port 401 mainly includes a front negative pressure adsorption port, a left negative pressure adsorption port, and a right negative pressure adsorption port (here, front, left, and right are defined with the front end plate as the front). The rear end of the guide plate 400 overlaps the edge of the oil collection tank 305, and its end extends directly above the oil collection tank 305 to guide the oil on the guide plate 400 into the oil collection tank 305 for collection. Edges are provided on the front, left, and right edges of the guide plate 400 to prevent oil from dripping from these three sides.

[0030] In this embodiment, the structure of the connection structure 500 has been specially designed, see [link to documentation]. Figure 7 The connecting structure 500 comprises two parts: an upper base 501 and a lower topology 502. The upper base 501 is fixedly connected to the lower surface of the top plate 301 of the main board 300. Two upper bases 501 are arranged near the left and right sides of the top plate 301, respectively. The material of the upper base 501 and the lower topology 502 may be the same as or different from the material of the smoke guide plate 400 or the main board 300. The surfaces of the upper base 501 and the lower topology 502 are smooth to prevent the oil fumes from changing direction randomly upon impact with these structures, thus preventing a reduction in adsorption efficiency.

[0031] See Figure 8 Two lower topology components 502 are also provided, corresponding to the upper base 501. Each lower topology component 502 includes two rear support parts 5021 located on the rear side, a front support part 5022 located on the front side, and a topology body 5023 located between the rear support parts 5021 and the front support parts 5022. The height of the front support parts 5022 and the rear support parts 5021 is greater than the height of the topology body 5023, so as to form a certain gap between the top plate 301 of the main board and the smoke guide plate 400, thereby forming a negative pressure zone. The lower topology component 502 serves two purposes: firstly, it connects the upper base 501 and the smoke guide plate 400, and works with the upper base 501 to control the gap between the top plate 301 and the smoke guide plate 400; secondly, it adjusts the distribution of negative pressure at the negative pressure adsorption port 401.

[0032] In addition, a front connecting part 5024 is provided between the front support part 5022 of the two lower topology parts 502. The topology body 5023 and the rear support part 5021, and the front connecting part 5024 and the front support part 5022 are in contact and can be connected or not connected. They can be separate or integrated.

[0033] The structure of the lower topology 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 400. The adsorption ports are separated 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.

[0034] In one embodiment, the front connecting portion 5024 has an upwardly protruding ridge 5024a in its middle, the ridge 5024a gradually increasing in height from both ends to the middle. This ridge 5024a helps to further optimize the negative pressure of the front negative pressure adsorption port. It increases the local negative pressure while reducing the negative pressure in other areas. This optimizes the negative pressure adsorption of oil fumes, reduces the diffusion of oil fumes, and enhances the concentrated adsorption effect.

[0035] In one embodiment, the front support portion 5022 is nearly cylindrical in shape, with its top end inserted into a socket on the upper base 501 for connection, and its bottom end fixedly or integrally connected to the smoke guide plate 400. The diameter of the front support portion 5022 gradually increases from top to bottom, which is beneficial for further optimizing the negative pressure of the negative pressure adsorption port.

[0036] In one embodiment, see Figure 9 The upper base 501 includes a locking part 5011 located on the front side, a rotating part 5012 located on the rear side, and a base body 5013. The rotating part 5012 is connected to the rear support part 5021 of the lower topology 502, and the locking part 5011 is connected to the front support part 5022 of the lower topology 502. The rotating part 5012 includes two connecting pieces, and a slot 5012a is formed between the two connecting pieces for inserting the rear support part 5021 of the lower topology 502. A guide groove 5012b is formed on the inner sidewall of the connecting piece, and a through hole is formed on the rear support part 5021. A rotating rod 5021a passes through the through hole and slides into the guide groove 5012b to achieve a sliding connection.

[0037] In one embodiment, the height of the base body 5013 gradually decreases from both ends to the middle, presenting a structure that is low in the middle and high at both ends. This is beneficial for achieving a better negative pressure distribution effect in conjunction with the lower topology 502, making the negative pressure in the core area more concentrated.

[0038] See Figure 10 The 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. The transition from the first rotation center 5012b-1 to the second rotation center 5012b-2 is smooth. The height of the support position of the guide groove 5012b for the rotating rod 5021a gradually decreases. A limiting boss 5012c is provided at the groove opening of the guide groove 5012b.

[0039] The locking part 5011 of the upper base 501 and the front support part 5022 of the lower topology 502 are detachably connected. A locking groove 5011a is formed on the locking part 5011, and a locking component 503 is provided in the groove. The locking component 503 includes a locking block 5031 embedded in the locking groove 5011a of the locking part 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. A pressing member 5031c and an elastic member 5031d located behind the pressing member 5031c are provided in the side channel 5031b. The front support part 5022 is locked by the force exerted by the elastic member 5031d on the pressing member 5031c.

[0040] See Figure 11 The extrusion member 5031c includes an extrusion head 5031c-1 at the front end, a limiting platform 5031c-2 at the rear end, and a connecting area 5031c-3 connecting 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. The working surface of the extrusion head 5031c-1 is a spherical surface.

[0041] The front support portion 5022 has a locking top 5022a at its top to cooperate with the locking portion 5011. The locking top 5022a includes a tip 5022a-1 and a neck 5022a-2 located below the tip 5022a-1. The neck 5022a-2 is connected to the main body of the front support portion 5022. The tip 5022a-1 gradually widens from the top to near the neck 5022a-2 and has a triangular cross-section. A limiting platform 5022a-3 is formed at the connection position between the tip 5022a-1 and the neck 5022a-2.

[0042] During installation, push the guide plate 400 upwards with a little force. The locking top 5022a of the front support 5022 is inserted into the main channel 5031a and passes through the extruder 5031c. The extrusion head 5031c-1 of the extruder 5031c is located below the limiting platform 5022a-3 of the locking top 5022a. At this time, the extruder 5031c is pressed against the neck 5022a-2 under the action of the elastic member 5031d. Due to the presence of the limiting platform 5022a-3, the locking top 5022a will not detach from the extruder 5031c, which can ensure the stable installation of the guide plate 400.

[0043] During disassembly, press down the smoke guide plate 400 with a little force. At this time, since the working surface of the extrusion head 5031c-1 is a spherical surface, under the action of external force, the locking top 5022a can press the extrusion head 5031c-1 inward to the elastic member 5031d, thereby causing the locking top 5022a to disengage from the extrusion head 5031c-1, and then disassemble the locking part of the front support part 5022 from the upper base 501.

[0044] Since the rear end of the smoke guide plate 400 needs to receive the oil collection tank 305, interference may occur between the smoke guide plate 400 and the rear end plate 303 when the smoke guide plate 400 is rotated to adjust its angle or disassembled. The connection structure in this embodiment avoids interference between the smoke guide plate 400 and the rear end plate 303 when the smoke guide plate 400 is rotated. During operation, first apply slight pressure to the front end of the smoke guide plate 400, causing the front support 5022 to disengage from the locking part 5011 of the upper base 501. At this time, under the weight of the smoke guide plate 400 or under the external force of the operator, the rotating rod moves forward and downward from the first rotation center along the guide groove to the second rotation center, thus allowing the smoke guide plate 400 to be rotated freely, avoiding interference from the rear end plate 303 and the oil collection tank 305. See the state diagram below the first rotation center. Figure 12 See the state diagram under the second rotation center. Figure 13 .

[0045] The height of the topological body 5023 of the lower topological component 502 gradually decreases from both ends to the middle. The height of both ends is greater than the height of the middle part. This setting allows for targeted distribution of the adsorption negative pressure of the side negative pressure adsorption port 401, increasing the local (middle) adsorption negative pressure and improving the side adsorption efficiency of flue gas.

[0046] In this embodiment, the lower topology 502 and the upper base 501 are hollow structures, which can save materials, reduce weight, and make the smoke inlet system lighter.

[0047] In another specific embodiment, the structure of the oil filter 200 includes a body, see [link to previous embodiment]. Figure 14 The main body includes two mesh panels 201 (left and right) and a negative pressure regulating strip 202 connecting the two mesh panels 201. The negative pressure regulating strip 202 is elongated and extends from the front panel 302 to the rear panel 303 of the range hood, located in the center of the main body. The two mesh panels 201 are symmetrical about the negative pressure regulating strip 202. The two mesh panels 201 are respectively connected to two sides along the length of the negative pressure regulating strip 202, and the mesh panels form an angle α between them 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 effectively gather the fumes; if it is too small, it will block the fumes from entering, thus reducing the smoke extraction effect.

[0048] This design of the oil filter effectively gathers the sucked-up fumes, guiding them quickly into the collection channel. Simultaneously, this structure reduces the speed and impact of the fumes reaching the filter, minimizing fume dispersion and significantly reducing suction noise. Furthermore, this structure guides grease to the sides of the filter, preventing excessive accumulation and blockage in the central area. The projection of the central negative pressure regulating strip 202 corresponds to the negative pressure regulating hole on the protruding area, meaning the strip is directly above it, preventing grease from dripping onto the hole.

[0049] In this embodiment, see Figure 15 The mesh of the mesh body 201 is diamond-shaped, and one diagonal of the diamond-shaped mesh is parallel to the negative pressure regulating bar 202.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A smoke guide plate, characterized in that, Includes: a plate having a front surface facing the gas stove and a back surface located on the opposite side of the front surface, wherein a deceleration structure (403) is provided on the front surface to slow down the speed at which oil fumes spread to the surrounding area when they reach the front surface, and the deceleration structure (403) is a protruding structure or a recessed structure formed on the front surface in a strip or dot distribution.

2. A smoke guide plate according to claim 1, characterized in that, The deceleration structure (403) consists of multiple strip-shaped protruding or recessed structures formed on the positive surface, and the multiple protruding or recessed structures are parallel to each other.

3. A smoke guide plate according to claim 2, characterized in that, The deceleration structure (403) consists of multiple strip-shaped protrusions formed on the front surface. The multiple protrusions are parallel to each other and parallel to the edge of the smoke guide plate.

4. A smoke guide plate according to claim 1, characterized in that, A smoking adjustment area (402) protruding beyond the plane of the plate is provided on the plate body, and a negative pressure adjustment hole (402a) is provided in the smoking adjustment area (402) for adjusting the adsorption pressure of the smoking adjustment area (402).

5. A smoke guide plate according to claim 4, characterized in that, The smoking adjustment area (402) is a concave area formed by the indentation of the middle part of the plate towards the upper surface of the smoke guide plate, or a convex area formed by the indentation of the middle part of the plate away from the upper surface of the smoke guide plate. The smoking adjustment area (402) includes a top wall and two side walls.

6. A smoke guide plate according to claim 5, characterized in that, The negative pressure adjustment hole (402a) is located on the top wall of the concave region.

7. A smoke guide plate according to claim 6, characterized in that, On the convex region, the negative pressure adjustment hole (402a) is opened on the side wall.

8. A smoke guide plate according to claim 6, characterized in that, The distance between the two sidewalls of the smoking adjustment area (402) gradually increases from the top wall of the smoking adjustment area (402) to the far end.

9. A smoke guide plate according to claim 5, characterized in that, The negative pressure regulating hole (402a) is elongated and is set along the length of the smoking regulating area (402).

10. A range hood, characterized in that, It includes the smoke guide plate according to any one of claims 1-9.

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