Range hood

Abstract

The utility model provides a kind of oil fume suction, belong to oil fume suction equipment technical field. Including casing and fan, the casing includes mutually communicating fume collector and fan cover, the fan cover has first plane and second plane;The fan is installed in the fan cover, the fan has first air inlet surface and second air inlet surface;Wherein, the first air inlet surface is oppositely arranged with the first plane, the second air inlet surface is oppositely arranged with the second plane, the distance from the first air inlet surface to the first plane is greater than the distance from the second air inlet surface to the second plane. This oil fume suction machine passes through the distance from first air inlet surface to first plane is greater than the distance from second air inlet surface to second plane, without extra increasing the power of fan, can improve the smoke volume of oil fume suction machine, greatly improve the use experience of user.

Description

Technical Field

[0001] This utility model belongs to the technical field of oil fume extraction equipment, specifically relating to an oil fume extraction machine. Background Technology

[0002] As people's living environments change and their quality of life improves, the demands on range hoods are also increasing. Smoke extraction capacity is one of the most important technologies for range hoods. Current technology generally increases the airflow by increasing the fan power, thereby increasing the smoke extraction capacity. However, increasing fan power increases both electricity consumption and noise levels, leading to a poor user experience. Utility Model Content

[0003] In view of the problems existing in the prior art, this utility model provides a range hood, and the technical problem to be solved is: how to increase the smoke extraction capacity of the range hood and improve the user experience.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A range hood, comprising:

[0006] The housing includes a smoke collection hood and a fan hood that are interconnected, the fan hood having a first plane and a second plane;

[0007] A fan, the fan being installed inside the fan cover, the fan having a first air inlet surface and a second air inlet surface;

[0008] The first air inlet surface is positioned opposite to the first plane, and the second air inlet surface is positioned opposite to the second plane. The distance from the first air inlet surface to the first plane is greater than the distance from the second air inlet surface to the second plane.

[0009] In the above-mentioned range hood, the distance from the first air inlet surface to the first plane is l1, and the distance from the second air inlet surface to the second plane is l2, where l1 / l2 = 2 ± 0.5.

[0010] In the aforementioned range hood, the fan includes:

[0011] A volute, comprising a front cover plate, an annular wall, and a rear cover plate, wherein the front cover plate, the annular wall, and the rear cover plate enclose a volute cavity;

[0012] An impeller is installed inside the volute cavity, and the impeller includes a base and a plurality of blades evenly spaced around the periphery of the base;

[0013] A flow channel is formed between two adjacent blades. The end of the flow channel closer to the center of the impeller is the inlet end, and the end of the flow channel farther from the center of the impeller is the outlet end. The fluid flows from the inlet end to the outlet end in the flow channel direction, and the flow channel gradually narrows from the inlet end to the outlet end.

[0014] In the aforementioned range hood, the base includes an upper plate, a middle plate, and a lower plate. The upper plate and the lower plate are circular rings of the same size. A plurality of blades are inserted through the middle plate, and the two ends of the plurality of blades are fixedly connected to the upper plate and the lower plate, respectively.

[0015] In the aforementioned range hood, the distance from the middle plate to the upper plate is l3, and the distance from the middle plate to the lower plate is l4, where l3 / l4 = 2 ± 0.5.

[0016] In the above-mentioned range hood, the cross-section of the blade is arc-shaped with a radius of r, and the outer arc diameter of the ring is d1. The relationship between the radius r of the blade and the outer arc diameter d1 of the ring satisfies: 0.03≤r / d1≤0.06.

[0017] In the above-mentioned range hood, the distance from the upper plate to the lower plate is the width of the impeller, the width is b, 100mm≤b≤180mm, and the relationship between the width b of the impeller and the outer arc diameter d1 of the ring satisfies: 0.38≤b / d1≤0.55.

[0018] In the above-mentioned range hood, the inner arc diameter of the ring is d2, and the relationship between the outer arc diameter d1 and the inner arc diameter d2 of the ring satisfies: 0.82≤d2 / d1≤0.95.

[0019] In the above-mentioned range hood, the minimum distance between two adjacent blades is i, 4mm≤i≤10mm, the number of blades is z, and the relationship between the number of blades z, the outer arc diameter d1 of the ring and the minimum distance i between two adjacent blades satisfies: z=π﹒ d1 / i.

[0020] In the above-mentioned range hood, the fan cover also has a third plane and a fourth plane, the distance from the center point of the impeller to the third plane is s1, the distance from the center point of the impeller to the fourth plane is s2, and s1 / s2=1±0.5.

[0021] The beneficial effects of this utility model are:

[0022] The range hood of this invention increases the smoke extraction capacity by making the distance from the first air inlet surface to the first plane greater than the distance from the second air inlet surface to the second plane, without needing to increase the power of the fan, thus greatly improving the user experience. Attached Figure Description

[0023] Figure 1 This is a structural diagram of a range hood;

[0024] Figure 2 This is a structural schematic diagram of a range hood from another perspective;

[0025] Figure 3 This is a cross-sectional view of a range hood;

[0026] Figure 4 A schematic diagram of removing the first plane for fume extraction;

[0027] Figure 5 This is a schematic diagram of the fan structure;

[0028] Figure 6 This is a schematic diagram of the impeller structure;

[0029] Figure 7 This is a structural schematic diagram of the impeller from another perspective;

[0030] Figure 8 This is a cross-sectional view of the impeller;

[0031] Figure 9 This is a cross-sectional view of several blades;

[0032] Figure 10 This is a schematic diagram of a circular ring.

[0033] In the diagram, 100 is the casing; 110 is the smoke hood; 120 is the fan cover; 121 is the first plane; 122 is the second plane; 123 is the third plane; 124 is the fourth plane; 200 is the fan; 210 is the first air inlet surface; 220 is the second air inlet surface; 230 is the volute; 231 is the front cover plate; 232 is the annular wall; 233 is the rear cover plate; 240 is the impeller; 241 is the base; 242 is the blade; 243 is the flow channel; 244 is the inlet end; 245 is the outlet end; 246 is the upper plate; 247 is the middle plate; and 248 is the lower plate. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0036] like Figure 1-4 As shown, this embodiment provides a range hood, including a housing 100 and a fan 200. The housing 100 includes a smoke collection hood 110 and a fan hood 120 that are interconnected. The fan hood 120 has a first plane 121 and a second plane 122. The fan 200 is installed inside the fan hood 120 and has a first air inlet surface 210 and a second air inlet surface 220. The first air inlet surface 210 is disposed opposite to the first plane 121, and the second air inlet surface 220 is disposed opposite to the second plane 122. The distance from the first air inlet surface 210 to the first plane 121 is greater than the distance from the second air inlet surface 220 to the second plane 122.

[0037] The range hood housing 100 includes a smoke collection hood 110 and a fan hood 120 that are interconnected. The smoke collection hood 110 is the part of the range hood that collects oil fumes and may be provided with an air inlet. The fan hood 120 is the part that installs the fan 200 and is provided with an air outlet. When the range hood is working, the fan 200 is started, and the oil fumes outside the range hood are drawn into the smoke collection hood 110 through the air inlet of the smoke collection hood 110. The smoke collection hood 110 and the fan hood 120 are connected, and the oil fumes are discharged from the air outlet of the fan hood 120 through the fan 200, thus completing the oil fume extraction process of the range hood. In this embodiment, the fan shroud 120 has a first plane 121 and a second plane 122, and the fan 200 has a first air inlet surface 210 and a second air inlet surface 220. The first air inlet surface 210 is disposed opposite to the first plane 121, and the second air inlet surface 220 is disposed opposite to the second plane 122. The distance from the first air inlet surface 210 to the first plane 121 is greater than the distance from the second air inlet surface 220 to the second plane 122. It should be noted that when the range hood is installed on a wall, the fan shroud 120... The second plane 122 is the plane closest to the wall, and the first plane 121 of the fan shroud 120 is the plane furthest from the wall. Since the impeller 240 of the fan 200 needs to be driven to rotate by a motor installed inside, and the motor is close to the second air inlet surface 220, the first air inlet surface 210 of the fan 200 is the main air inlet surface, and the second air inlet surface 220 is the secondary air inlet surface. When the fan 200 is working, the air mainly enters the interior of the fan 200 from the first air inlet surface 210, and of course, the second air inlet surface... A small amount of air will also enter through 220; the first air inlet surface 210 serves as the main air inlet surface, and the distance from the first air inlet surface 210 to the first plane 121 is greater than the distance from the second air inlet surface 220 to the second plane 122. In other words, the space between the first air inlet surface 210 and the first plane 121 is greater than the space between the second air inlet surface 220 and the second plane 122. The space between the first air inlet surface 210 and the first plane 121 can accommodate more oil fumes, and there is a larger air volume between the first air inlet surface 210 and the first plane 121. When the range hood is working, it can draw a large amount of oil fumes into the fan 200 through the first air inlet surface 210 and then exhaust them through the air outlet of the fan hood 120. Therefore, by adjusting the installation position of the fan 200 so that the distance from the first air inlet surface 210 to the first plane 121 is greater than the distance from the second air inlet surface 220 to the second plane 122, the range hood can increase its smoke extraction capacity without increasing the power of the fan 200, greatly improving the user experience. As one embodiment, the fan 200 is a volute 230 fan 200.

[0038] like Figure 3 As shown, the distance from the first air inlet surface 210 to the first plane 121 is l1, and the distance from the second air inlet surface 220 to the second plane 122 is l2, where l1 / l2 = 2 ± 0.5.

[0039] In this embodiment, the distance l1 between the first air inlet surface 210 and the first plane 121 and the distance l2 between the second air inlet surface 220 and the second plane 122 satisfy l1 / l2=2±0.5. By limiting the relationship between l1 and l2, it is ensured that the distance between the first air inlet surface 210 and the first plane 121 is greater than the distance between the second air inlet surface 220 and the second plane 122. That is, the space between the first air inlet surface 210 and the first plane 121 is greater than the space between the second air inlet surface 220 and the second plane 122. This ensures that the space between the first air inlet surface 210 and the first plane 121 can accommodate more oil fumes and has a larger air volume. Therefore, the smoke extraction capacity of the range hood can be increased without increasing the power of the fan 200, thus improving the user experience.

[0040] like Figure 5 As shown, the fan 200 includes a volute 230 and an impeller 240. The volute 230 includes a front cover plate 231, an annular wall 232, and a rear cover plate 233, which together form a volute cavity. The impeller 240 is installed inside the volute cavity and includes a base 241 and a plurality of blades 242 evenly spaced around the base 241. A flow channel 243 is formed between two adjacent blades 242. The end of the flow channel 243 near the center of the impeller 240 is the inlet end 244, and the end of the flow channel 243 away from the center of the impeller 240 is the outlet end 245. The flow direction of the fluid in the flow channel 243 is from the inlet end 244 to the outlet end 245, and the flow channel 243 gradually narrows from the inlet end 244 to the outlet end 245.

[0041] In this embodiment, the front cover plate 231 is the first air inlet surface 210, and the rear cover plate 233 is the second air inlet surface 220. The impeller 240 includes a base 241 and several blades 242. The base 241 is used to fix the blades 242 and provide support for them. The projection of the base 241 on the water surface is circular. Therefore, the blades 242 are evenly spaced around the periphery of the base 241, forming a circular array of blades 242 around the periphery of the base 241. The blades 242 in the circular array are conducive to air outlet to improve the outlet air pressure. It can be understood that the periphery of the base 241 is surrounded by several blades 242, and the two ends of the base 241 have air inlet openings. A flow channel 243 is formed between two adjacent blades 242. When the impeller 240 is working, the air flows from the base. The air enters the interior of the base 241 through the openings at both ends of the 241 and then exits through the flow channel 243 between the blades 242. In this embodiment, the end of the flow channel 243 closer to the center of the impeller 240 is defined as the inlet end 244, and the end of the flow channel 243 farther from the center of the impeller 240 is defined as the outlet end 245. The air entering the interior of the base 241 flows from the inlet end 244 of the flow channel 243 to the outlet end 245 of the flow channel 243, thus achieving air discharge. Since the flow channel 243 gradually narrows from the inlet end 244 to the outlet end 245, that is, the flow channel 243 gradually shrinks from the inlet end 244 to the outlet end 245, the air pressure and airflow speed continuously increase when the air is discharged from the flow channel 243, ensuring the air volume and eliminating the vortex area in the flow channel 243, thereby reducing wind noise.

[0042] like Figure 6-8 As shown, the base 241 includes an upper plate 246, a middle plate 247 and a lower plate 248. The upper plate 246 and the lower plate 248 are circular rings of the same size. A plurality of blades 242 are inserted through the middle plate 247, and the two ends of the plurality of blades 242 are respectively riveted and fixed to the upper plate 246 and the lower plate 248.

[0043] In this embodiment, the base 241 includes an upper plate 246, a middle plate 247, and a lower plate 248. The upper plate 246 and lower plate 248 are located above and below the middle plate 247, respectively. Several blades 242 are inserted into the middle plate 247, and the two ends of each blade 242 are riveted and fixed to the upper plate 246 and lower plate 248 to form a single unit. The upper plate 246 and lower plate 248 are circular rings of the same size, thus serving as the inlet for the impeller 240. When the impeller 240 is operating, air enters the interior of the impeller 240 through the upper plate 246 and lower plate 248, and then exits through the flow channel 243 between the blades 242. Furthermore, the base 241, comprising the upper plate 246, middle plate 247, and lower plate 248, ensures the integrity and mechanical strength of the impeller 240, thereby guaranteeing its performance.

[0044] like Figure 8 As shown, the distance from the middle plate 247 to the upper plate 246 is l3, and the distance from the middle plate 247 to the lower plate 248 is l4, where l3 / l4 = 2 ± 0.5.

[0045] In this embodiment, the relationship between the distance l3 from the middle plate 247 to the upper plate 246 and the distance l4 from the middle plate 247 to the lower plate 248 satisfies l3 / l4=2±0.5. By limiting the relationship between l3 and l4, the air intake efficiency of the impeller 240 is ensured, thereby improving the smoke extraction capacity of the range hood.

[0046] like Figure 9 As shown, the cross-section of the blade 242 is arc-shaped with a radius of r, and the outer arc diameter of the ring is d1. The relationship between the radius r of the blade 242 and the outer arc diameter d1 of the ring satisfies: 0.03≤r / d1≤0.06.

[0047] In this embodiment, the cross-section of the blade 242120 is arc-shaped with a radius of r. The relationship between the radius r of the blade 242 and the diameter d1 of the ring satisfies 0.03≤r / d1≤0.06. By limiting the relationship between the radius r of the blade 242 and the diameter d1 of the ring, the flow channel 243 between adjacent blades 242 gradually narrows from the inlet end 244 to the outlet end 245, so that the wind pressure and airflow velocity continuously increase, ensuring the air volume, thereby eliminating the vortex area in the flow channel 243 and reducing wind noise.

[0048] like Figure 10 As shown, the distance from the upper plate 246 to the lower plate 248 is the width of the impeller 240, which is b, 100mm≤b≤180mm. The relationship between the width b of the impeller 240 and the outer arc diameter d1 of the ring satisfies: 0.38≤b / d1≤0.55.

[0049] In this embodiment, based on the dimensions of the impeller 240 and considering its installation and structural strength, the width b of the impeller 240 satisfies 100mm≤b≤180mm, and the relationship between the width b of the impeller 240 and the outer arc diameter d1 of the annulus is 0.38≤b / d1≤0.55, thus ensuring the overall dimensions and structural strength of the impeller 240.

[0050] like Figure 10 As shown, the inner arc diameter of the ring is d2, and the relationship between the outer arc diameter d1 and the inner arc diameter d2 of the ring satisfies: 0.82≤d2 / d1≤0.95.

[0051] In this embodiment, the inner arc diameter of the ring is d2, which is the diameter of the upper and lower air inlets of the impeller 240. By limiting the relationship between the outer arc diameter d1 and the inner arc diameter d2 of the ring (0.82≤d2 / d1≤0.95), the size of the air inlet of the impeller 240 is ensured, thereby ensuring the air intake efficiency of the impeller 240 and improving the smoke extraction capacity of the range hood.

[0052] like Figure 9 As shown, the minimum distance between two adjacent blades 242 is i, 4mm≤i≤10mm, and the number of blades 242 is z. The relationship between the number of blades 242 z, the outer arc diameter d1 of the ring and the minimum distance i between two adjacent blades 242 satisfies: z=π﹒ d1 / i.

[0053] In this embodiment, by limiting the number of blades 242 z, the outer arc diameter d1 of the ring, and the minimum distance i between two adjacent blades 242, the relationship z = π d1 / i is established. This ensures that the number of blades 242 in the impeller 240 is appropriate, the flow rate of the blades 242 is optimal, and the air volume is guaranteed. Furthermore, while meeting the requirements of reducing airflow boundary layer separation and relative eddies, it avoids the increase in frictional loss of the fluid in the impeller 240 due to too many blades 242, which would reduce the actual pressure of the impeller 240 and increase energy consumption.

[0054] like Figure 4 As shown, the fan cover 120 also has a third plane 123 and a fourth plane 124. The distance from the center point of the impeller 240 to the third plane 123 is s1, and the distance from the center point of the impeller 240 to the fourth plane 124 is s2, where s1 / s2 = 1 ± 0.5.

[0055] In this embodiment, the third plane 123 and the fourth plane 124 are located between the first plane 121 and the second plane 122. The first plane 121, the second plane 122, the third plane 123 and the fourth plane 124 enclose a fan shroud 120. The fan 200 is installed within the first plane 121, the second plane 122, the third plane 123 and the fourth plane 124. By defining the relationship between the distance s1 from the center point of the impeller 240 to the third plane 123 and the distance s2 from the center point of the impeller 240 to the fourth plane 124 as s1 / s2=1±0.5, the fan 200 is ensured to be in the middle position between the third plane 123 and the fourth plane 124, thus ensuring the air intake volume of the fan 200.

[0056] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

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