Volute assembly and range hood

Abstract

The utility model discloses a volute assembly and a range hood, and relates to the technical field of range hoods, the volute assembly is applied to the range hood, the volute assembly comprises a volute body and an air inlet net, and the volute body is provided with an air inlet; the air inlet net covers the air inlet and is provided with a mesh structure communicated with the air inlet. According to the technical scheme, on the basis that the safety requirement is met, smoke can enter the volute body more evenly, the work efficiency of the fan impeller is improved, and noise of the whole machine is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, and particularly relates to a volute assembly and a range hood. Background Art

[0002] The range hood drives the impeller to rotate at a high speed through a motor, forms a negative pressure area in the volute, and sucks the cooking fumes into the interior of the range hood. The range hood needs to meet the safety regulations requirements. Currently, an oil net is mainly arranged on the range hood box body to prevent dangerous accidents from occurring during the process of the cooking fumes entering the interior of the range hood. Moreover, when the cooking fumes flow through the oil net, large-particle cooking fumes are separated and adhered to the oil net, reducing the accumulation of oil stains inside the range hood. However, the mesh holes of the oil net are dense, the wind resistance is large, and it is easily blocked by oil stains, resulting in a reduction in the efficiency of the range hood. Summary of the Utility Model

[0003] The main purpose of the utility model is to propose a volute assembly and a range hood, which can make the cooking fumes enter the fan system more evenly on the basis of meeting the safety regulations requirements, improve the working efficiency of the fan impeller, and reduce the overall noise of the machine.

[0004] To achieve the above purpose, the volute assembly proposed by the utility model includes: a volute body and an air inlet net. The volute body is provided with an air inlet; the air inlet net covers the air inlet and is provided with a mesh structure communicated with the air inlet.

[0005] In an embodiment, the air inlet net includes an installation ring and a wind net body arranged inside the installation ring. The mesh structure is formed on the wind net body, and the installation ring is connected to the air inlet.

[0006] In an embodiment, the installation ring is further provided with an arc-shaped air guiding structure extending into the air inlet.

[0007] In an embodiment, the wind net body and the installation ring are integrally formed.

[0008] In an embodiment, the mesh structure includes at least one mesh area. In the mesh area, the aperture of the mesh gradually increases in the direction from the center of the mesh area to the outside.

[0009] In an embodiment, the wind net body includes a plurality of main radiation bars radially distributed from the center of the wind net body to the outside; and

[0010] a plurality of circular ring-shaped members with gradually increasing radii centered on the center. Each circular ring-shaped member is connected to a plurality of the main radiation bars, and the free ends of the plurality of main radiation bars are respectively connected to the installation ring.

[0011] In one embodiment, a first dividing strip is disposed between two adjacent main radiation strips, and the first dividing strip equally divides a plurality of mesh holes that gradually increase in size from the center toward the outside.

[0012] In one embodiment, a second dividing strip is arranged between the main radial strip and the first dividing strip, and the plurality of annular components include an intermediate annular component arranged in the middle of the main radial strip and an end annular component arranged at the outermost side of the main radial strip, and the second dividing strip connects the intermediate annular component and the end annular component, and divides the mesh between the intermediate annular component and the end annular component equally.

[0013] In one embodiment, the distance between any two adjacent annular members is less than or equal to 10 mm.

[0014] In one embodiment, the height between the highest point of the surface of the mesh structure and the surface of the mounting ring is L, 9mm≤L≤15mm.

[0015] In one embodiment, the mesh structure is provided with an escape opening for components to pass through, the escape opening blocks part of the main radiation strips, and the blocked part of the main radiation strips is located between the mounting ring and the annular component closest to the mounting ring.

[0016] The utility model also provides a range hood, comprising:

[0017] A chassis, the chassis having an air duct, and a smoke inlet and a smoke exhaust port communicated with the air duct;

[0018] The volute assembly as described above is arranged in the air duct and has an air inlet connected to the air duct and an air outlet connected to the smoke exhaust port; and

[0019] The fan assembly is arranged in the volute assembly.

[0020] The air inlet net provided by the technical solution of the utility model is applied to the air inlet of the volute body of the range hood. The air inlet net is provided with an oil mesh structure, which can meet the safety requirements and ensure the safe use of the fan; and the mesh structure can weaken the eddy current at the air inlet of the fan, so that the smoke enters the fan system more evenly, which can improve the oil separation degree of the whole machine, and improve the working efficiency of the fan impeller, and reduce the noise of the whole machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0022] Figure 1 FIG. 4 is a schematic structural diagram of an embodiment of a volute component in an oil fume machine provided by the present invention;

[0023] Figure 2 FIG. Figure 1 FIG. 10 is a schematic structural diagram of an embodiment of a middle air inlet net;

[0024] Figure 3 FIG. Figure 2 FIG. 16 is a schematic structural diagram of a cross-section of the middle air inlet net;

[0025] Figure 4 FIG. Figure 1 FIG. 22 is a schematic structural diagram of another perspective of the middle air inlet net.

[0026] Explanation of the reference numerals in the drawings:

[0027] 100, volute component; 200, volute body; 210, air inlet; 300, air inlet net; 310, mounting ring; 320, air net body; 321, main radiation bar; 322, circular ring member; 323, first partition bar; 324, second partition bar; 330, mesh structure; 331, avoidance opening; 340, arc-shaped air guiding structure; 350, mesh area.

[0028] The realization of the purpose, functional features and advantages of the present invention will be further described in conjunction with the embodiments with reference to the drawings. Specific embodiments

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0030] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0031] In addition, if the descriptions such as "first" and "second" are involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0032] The range hood is driven by a motor to rotate the impeller at a high speed, forming a negative pressure area in the volute, and sucking the cooking fumes into the interior of the range hood. The range hood needs to meet the safety regulations requirements. Currently, an oil screen is mainly arranged in the range hood housing to prevent dangerous accidents from occurring during the process of the cooking fumes entering the interior of the range hood. Moreover, as the cooking fumes flow through the oil screen, large particles of cooking fumes are separated and adhered to the oil screen, reducing the accumulation of oil stains inside the range hood. However, the mesh holes of the oil screen are dense, resulting in a large wind resistance and being easily blocked by oil stains, reducing the efficiency of the range hood.

[0033] Please refer to Figure 1 , Figure 1 , where the arrow indicates the schematic of the air inlet path. The present utility model provides a volute assembly 100, which is applied to a range hood. The volute assembly 100 includes a volute body 200 and an air inlet screen 300. The volute body 200 is provided with an air inlet 210; the air inlet screen 300 covers the air inlet 210 and is provided with a mesh structure 330 communicating with the air inlet 210.

[0034] The air inlet screen 300 has a mesh structure 330 and is simultaneously arranged at the air inlet 210 of the volute, which not only meets the safety regulations requirements but also can weaken the eddy current at the air inlet 210 of the fan, enabling the cooking fumes to enter the fan system more evenly, improving the work efficiency of the fan impeller, and reducing the overall machine noise.

[0035] In an embodiment of the present utility model, the air inlet screen 300 includes an installation ring 310 and a wind screen body 320 arranged inside the installation ring 310. The installation ring 310 is provided with a buckle for snap connection with the volute body 200 and is locked and fixed to the volute body 200 through the screw holes on the installation ring 310. The mesh structure 330 is formed on the wind screen body 320, and the installation ring 310 is connected to the air inlet 210. In one embodiment, the wind screen body 320 and the installation ring 310 are integrally formed; in other embodiments, they are separately manufactured.

[0036] The air inlet net 300 provided by the technical solution of the present utility model is applied to the air inlet 210 of the volute of the range hood. The air inlet net 300 is provided with an oil net hole structure 330, which can meet the safety regulations requirements and ensure the safe use of the fan. And the mesh structure 330 can weaken the eddy current at the air inlet 210 of the fan, so that the flue gas enters the fan system more evenly, which can improve the grease separation degree of the whole machine, improve the work efficiency of the fan impeller, and reduce the noise of the whole machine.

[0037] Referring to Figure 2 , in order to improve the grease separation degree of the whole machine and avoid grease blocking the mesh holes, the mesh structure 330 includes at least one mesh area 350 ( Figure 2 the area indicated by the arrow in

[0038] ). In the mesh area 350, the aperture of the mesh gradually increases in the direction from the center of the mesh area 350 to the outside, so as to avoid blockage of the oil fume.

[0039] The mounting ring 310 is connected to the end of the main radiation bar 321; the concentrically arranged and gradually increasing circular members 322 form the air inlet net body 320 to be like a "fan cover". The air inlet net body 320 is connected to the volute through the mounting ring 310 and is fixed on the range hood.

[0040] In this embodiment, the number of the main radiation bars 321 is nine; the nine main radiation bars 321 are evenly distributed along the center of the air inlet net body 320, and the included angles between adjacent main radiation bars 321 are the same. The main radiation bars 321 converge at the small circular ring at the center of the air inlet net body 320, just like the "ribs" of an open umbrella.

[0041] In other embodiments, the number of the main radiation bars 321 can be two, three, five, six, eight, nine, etc.; the main radiation bars 321 may not be evenly distributed or there may be slight differences.

[0042] It should be noted that the center of the air duct body 320 refers to the geometric center of the air duct structure, that is, the point where all the main radiation bars 321 or the circular members 322 meet. The center of the air duct body 320 can be determined through measurement and calculation.

[0043] The circular members 322 with gradually increasing radii mean that they gradually become larger as the distance from the center increases; the circular members 322 do not limit each circular member 322 to be a complete circle; or rather, the edges of the circular members 322 can be continuous and closed or discontinuous and semi-closed; visually presenting as gradually changing rings.

[0044] The circular members 322 are arranged at intervals along the radiation direction. The meshes between two adjacent circular members 322 and two adjacent main radiation bars 321 are "fan-shaped". Due to the uniform intervals, the height of the fan-shaped surface remains unchanged, but the bottom surface increases, so the area of the meshes increases successively in the radiation direction.

[0045] Radially distributed means that the main radiation bars 321 extend outward from the center, just like the sun's rays emitting from the center of the sun. This distribution method has obvious directionality and symmetry. All the main radiation bars 321 start from a common center point and expand outward in a straight line. One can imagine the spokes of a wheel, which are all connected to the hub and extend towards the rim. In the air duct, this radial distribution helps to evenly disperse the wind force and improve the stability and efficiency of the air duct.

[0046] In this embodiment, the air duct body 320 is connected to the volute through the mounting ring 310. The mesh structure 330 corresponds to the air inlet 210. The ring opening of the mounting ring 310 is similar in size to the air inlet 210 of the volute. The size of the ring opening is similar to that of the air inlet 210 of the volute, raising the central collecting part, so that the mesh structure 330 is in the shape of an arc-shaped cover. Refer to Figure 3 and Figure 4 , the air inlet duct 300 also combines the function of the air inlet ring (air guiding ring). Specifically, the mounting ring 310 is provided with an arc-shaped air guiding structure 340 extending into the air inlet 210. The design of the arc-shaped air guiding structure 340 can guide the air flow to enter the air duct more smoothly, reducing the noise generated by the air flow hitting the hard and straight edges. The arc-shaped curved surface of the arc-shaped air guiding structure 340 helps the air flow to flow more smoothly, thereby reducing the noise. The arc-shaped surface is not as likely to produce strong reflections as a flat surface, so the overall noise level can be reduced.

[0047] During installation, a part of the arc-shaped air guiding structure 340 is embedded in the wind wheel of the fan, reducing the eddy current generated by the wind wheel and the volute, helping the air flow to flow more smoothly, thereby reducing the noise.

[0048] Refer to Figure 3, the free ends of the multiple main radiation bars 321 are respectively connected to the ring opening of the mounting ring 310. The multiple main radiation bars 321 converge towards the center from the connection points to form a converging portion, and the converging portion is higher than the mounting ring 310. The design that the converging portion is higher than the mounting ring 310 means that the converging portion is located at a position higher than the mounting ring 310, and it can be determined by directly observing or measuring the relative heights of the two.

[0049] Specifically, the height between the surface of the converging portion and the surface of the mounting ring 310 is L, and 9 mm ≤ L ≤ 15 mm.

[0050] The air inlet net 300 in the shape of an arc-shaped cover can create a larger effective air intake area because this layout allows air to enter the net from multiple directions rather than just one direction. The radial design helps to evenly distribute the incoming air flow, reducing the possibility of local high-speed air flows, which can reduce the noise generated due to excessive wind speed. Moreover, the radial layout reduces the turbulence and eddy currents when the air flow enters, and these turbulence and eddy currents may cause noise generation. By optimizing the air flow path, the noise level can be reduced.

[0051] Furthermore, for the convenience of installing equipment and passing wires, the mesh structure 330 is provided with an avoidance opening 331. The avoidance opening 331 cuts off part of the main radiation bars 321, and the cut-off part of the main radiation bars 321 is located between the mounting ring 310 and the circular ring member 322 closest to the mounting ring 310.

[0052] Specifically, the angle corresponding to the center of the avoidance opening 331 is 50° - 80°. For example, 60 degrees, 75 degrees, etc.

[0053] Furthermore, the air inlet net body 320 is provided with multiple reinforcing ribs. The multiple reinforcing ribs are respectively connected to the mounting ring 310 and the circular ring member 322 closest to the mounting ring 310, and bisect the mesh holes between the two.

[0054] The reinforcing ribs can improve the stiffness and strength of the air inlet net body 320. The reinforcing ribs help to maintain the stability of the mesh structure 330, prevent the mesh holes from deforming due to external forces, and ensure the stability and uniformity of the ventilation effect; and the reinforcing ribs can also prevent the area of the mesh holes from being too large and resulting in poor oil and gas filtration effect.

[0055] Specifically, the reinforcing rib extends to be connected to the arc-shaped air guiding structure 340. The arc-shaped air guiding structure 340 is a part extending outward from the edge of the mounting ring 310, and it may be deformed or damaged due to external forces. The extension of the reinforcing rib to this position can improve the connection strength of the overall structure: after the reinforcing rib is connected to the arc-shaped air guiding structure 340, the connection between various parts of the air duct body 320 (including the main radiation bars 321, the circular members 322, the mounting ring 310, and the arc-shaped air guiding structure 340) becomes more firm, and the overall structure is more stable. As the edge part of the air duct body 320, the arc-shaped air guiding structure 340 may bear uneven stresses. The extension of the reinforcing rib helps to disperse these stresses and reduce the risk of damage caused by stress concentration. In addition, if the design of the reinforcing rib is coordinated with the overall style, it can also increase the aesthetics of the structure and enhance the appearance design of the product.

[0056] Furthermore, multiple meshes that gradually increase from the center outward are formed by two adjacent main radiation bars 321 and multiple circular members 322. A first partition bar 323 is arranged between two adjacent main radiation bars 321, and the first partition bar 323 equally divides the multiple meshes that gradually increase from the center outward. By arranging the first partition bar 323 between two adjacent main radiation bars 321 and equally dividing these meshes that gradually increase from the center outward, it can ensure that the air flow passes through each mesh more evenly, thereby improving the overall ventilation efficiency; moreover, the addition of the first partition bar 323 increases the rigidity of the air duct. The design of the partition bar helps to guide the air flow along a predetermined path, reducing unnecessary turbulence and eddy currents. By optimizing the air flow path and reducing turbulence and eddy currents, the noise level during the operation of the air duct can be reduced.

[0057] Specifically, a second partition bar 324 is arranged between the main radiation bar 321 and the first partition bar 323. The multiple circular members 322 include an intermediate circular member 322 arranged in the middle of the main radiation bar 321 and an end circular member 322 arranged at the outermost side of the main radiation bar 321. The second partition bar 324 connects the intermediate circular member 322 and the end circular member 322 and equally divides the mesh between the intermediate circular member 322 and the end circular member 322.

[0058] By setting the first partition bar 323 and the second partition bar 324, it is possible to ensure that the mesh sizes between adjacent main radiation bars 321 are the same, thereby improving the mesh uniformity of the entire air mesh body 320. Moreover, the presence of the first partition bar 323 and the second partition bar 324 can enhance the structural stability of the air mesh body 320, reduce vibration and deformation caused by the action of wind force, and improve the service life of the air mesh body 320. By precisely controlling the size and distribution of the meshes, the ventilation efficiency of the air inlet mesh 300 can be optimized, ensuring the uniformity and stability of the air flow rate, neither making the meshes too large to reduce the filtering effect nor making the meshes dense, with a large wind resistance and being easily blocked by oil stains.

[0059] Referring to Figure 2 , specifically, the distance between two adjacent annular members 322 is such that the aperture of the defined mesh is h, where 5 mm ≤ h ≤ 10 mm. That is, the mesh cannot allow a column with a diameter of h to pass through. In other words, the spacing distance between the annular members 322 is h. For example, h can be 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, etc.

[0060] The present utility model also proposes an oil fume extractor (not shown in the figure), which includes a machine case, a fan assembly, a volute body 200, and an air inlet mesh 300. The machine case has an air duct, and the air duct includes a smoke inlet and a smoke outlet; the volute is arranged in the air duct and has an air inlet 210 communicating with the air duct and an air outlet connecting to the smoke outlet; the fan assembly is arranged in the volute; the air inlet mesh 300 is arranged on the volute body, and the mesh structure 330 corresponds to the air inlet 210.

[0061] The specific structure of the air inlet mesh 300 refers to the above-mentioned embodiment. Since this oil fume extractor adopts all the technical solutions of the above-mentioned all embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be elaborated here one by one. Among them, the air inlet mesh 300 has a mesh structure 330, which not only meets the safety regulations requirements, but also is arranged at the air inlet 210 of the volute, can weaken the eddy current at the air inlet 210 of the fan, make the flue gas enter the fan system more evenly, improve the work efficiency of the fan impeller, and reduce the noise of the whole machine. It can solve the problems of dense meshes, large wind resistance, and being easily blocked by oil stains existing in the oil mesh scheme.

[0062] The above description is only an exemplary embodiment of the present utility model, and does not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims

1. A volute assembly, applied to a range hood, characterized in that: The volute assembly comprises: The volute body is provided with an air inlet; and An air inlet net, which is covered on the air inlet and has a mesh structure communicating with the air inlet; The air inlet net includes a mounting ring and a wind net body arranged in the mounting ring, the mesh structure is formed in the wind net body, and the mounting ring is connected to the air inlet; The mounting ring is also provided with an arc-shaped air guiding structure extending into the air inlet, and a portion of the arc-shaped air guiding structure is embedded in the wind wheel of the fan.

2. The volute assembly according to claim 1, characterized in that: The air net body and the mounting ring are integrally formed.

3. The volute assembly according to claim 1, characterized in that: The mesh structure includes at least one mesh area, and in the mesh area, the apertures of the meshes are gradually increased from the center of the mesh area to the outside.

4. The volute assembly according to claim 3, characterized in that: The wind net body includes a plurality of main radiation strips that are radially distributed outward from the center of the wind net body; and A plurality of annular components with the center as the circle center and a gradually increasing radius, each of the annular components is connected to a plurality of the main radiation strips, and the free ends of the plurality of the main radiation strips are respectively connected to the mounting ring.

5. The volute assembly according to claim 4, characterized in that: A first dividing strip is arranged between two adjacent main radiation strips, and the first dividing strip equally divides a plurality of mesh holes which gradually increase in size from the center toward the outside.

6. The volute assembly according to claim 5, characterized in that: A second dividing strip is arranged between the main radial strip and the first dividing strip, and the plurality of annular components include an intermediate annular component arranged in the middle of the main radial strip and an end annular component arranged at the outermost side of the main radial strip. The second dividing strip connects the intermediate annular component and the end annular component and divides the mesh between the intermediate annular component and the end annular component in half.

7. The volute assembly according to claim 6, characterized in that: The distance between any two adjacent annular members is less than or equal to 10 mm.

8. The volute assembly according to claim 1, characterized in that: The height between the highest point of the surface of the mesh structure and the surface of the mounting ring is L, 9mm≤L≤15mm.

9. The volute assembly according to claim 1, characterized in that: The mesh structure is provided with an escape opening for components to pass through, and the escape opening separates part of the main radiation strips, and the separated part of the main radiation strips is located between the mounting ring and the annular component closest to the mounting ring.

10. A range hood, characterized in that: include: A chassis, the chassis having an air duct, and a smoke inlet and a smoke exhaust port communicated with the air duct; The volute assembly according to any one of claims 1 to 9, wherein the volute assembly is disposed in the air duct and has an air inlet connected to the air duct and an air outlet connected to the smoke exhaust port; and The fan assembly is arranged in the volute assembly.

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