Oil-proof sound absorption assembly, design method thereof and range hood

Abstract

The present application relates to a kind of oil-stain-proof sound-absorbing components and its design method and range hood.The oil-stain-proof sound-absorbing component includes: sound-absorbing body;Anti-fouling cover net, including a plurality of oil-wetted components that are interwoven, and covering the outer surface of the sound-absorbing body;And heating element, corresponding to the oil-wetted component, to heat the oil-wetted component, so that the oil attached to the surface of the anti-fouling cover net is heated to be in a fluid state without condensation, facilitating flow under the action of gravity, to ensure better noise reduction effect while also significantly extending the service life of sound-absorbing material, reduce maintenance frequency, reduce use cost.

Description

Technical Field

[0001] This invention relates to the field of kitchen equipment technology, and in particular to an oil-resistant sound-absorbing component, its design method, and a range hood. Background Technology

[0002] In recent years, range hoods have gradually become an indispensable kitchen appliance in many households. Their main function is to draw in cooking fumes through the fan system's impeller, filter the fumes using the inlet filter and impeller, and then exhaust the filtered fumes through the outlet, thus purifying the kitchen environment. Sound-absorbing materials in range hoods are primarily used to reduce noise. However, since these materials are constantly exposed to cooking fumes, if they cannot effectively prevent oil buildup, their sound absorption efficiency and lifespan will be severely affected. Therefore, the importance of preventing oil buildup on sound-absorbing materials is even more pronounced in range hoods. Adopting certain methods to prevent oil buildup on sound-absorbing materials can effectively improve the user experience and reduce maintenance costs.

[0003] Currently, the most common method for preventing oil stains is to arrange a mesh structure made of oleophilic materials (such as cotton, linen fibers, porous silicone, etc.) on the surface of the sound-absorbing material. This means covering the sound-absorbing material with a layer of anti-fouling mesh, which can use the competitive adsorption effect to adsorb grease from the sound-absorbing material and discharge it along the oil path under the action of gravity. This effectively prevents grease from contaminating the sound-absorbing material and has the advantages of being easy to clean and having little impact on the sound absorption effect.

[0004] However, although the anti-fouling mesh can absorb grease from the sound-absorbing material, the grease may not be able to remain in a fluid state. Especially in northern regions or when the temperature is low in winter, the grease is prone to solidify on the surface of the sound-absorbing material and the anti-fouling mesh, causing the grease to lose its fluidity, paralyzing the entire oil-conducting mechanism, and seriously affecting the sound absorption effect. Summary of the Invention

[0005] Therefore, it is necessary to address the problem that in existing range hoods, grease tends to solidify on the surface of sound-absorbing materials and anti-fouling mesh in northern regions or when winter temperatures are low, causing the grease to lose its fluidity, paralyzing the entire oil guiding mechanism, and seriously affecting the sound absorption effect. This invention provides an anti-grease-fouling sound-absorbing component, its design method, and a range hood.

[0006] In one embodiment of this application, the present invention provides an oil-resistant sound-absorbing component, comprising:

[0007] Sound-absorbing body;

[0008] A stain-resistant mesh, comprising multiple interwoven oleophilic strips, covers the outer surface of the sound-absorbing body; and

[0009] A heating element is correspondingly disposed on the oleophilic component to heat the oleophilic component.

[0010] In one embodiment of this application, the heating element is an electric heating wire embedded in the oleophilic component.

[0011] In one embodiment of this application, both the oleophilic component and the electric heating wire have a circular cross-section, and the electric heating wire and the oleophilic component are arranged concentrically.

[0012] In one embodiment of this application, the diameter of the oleophilic component is between 0.5 mm and 1 mm.

[0013] In one embodiment of this application, the minimum current supplied to the electric heating wire satisfies the following relationship:

[0014]

[0015] Among them: I min The minimum current flowing through the heating wire is represented by k, Nu, and λ, which are the thermal conductivity, Nusselt number, and viscosity of air at temperature Tc, respectively; D is the diameter of the oleophilic component; Th is the surface temperature of the oleophilic component; Tc is the first air temperature; d is the diameter of the heating wire; and F is the resistivity of the heating wire.

[0016] In one embodiment of this application, the maximum current supplied to the electric heating wire satisfies the following relationship:

[0017]

[0018] Among them: I max This indicates the maximum current flowing through the heating wire; k H Nu H and λ H These are air at temperature Tc H The thermal conductivity, Nusselt number, and viscosity of the material; D is the diameter of the oleophilic component; Th H Tc is the highest temperature that the oleophilic part can withstand. H d is the second air temperature; d is the diameter of the electric heating wire; F is the resistivity of the electric heating wire; K is the safety factor.

[0019] In one embodiment of this application, the oil-resistant sound-absorbing component further includes an oil guide, which is inclinedly arranged below the anti-fouling cover; the oil guide is a metal sheet fixedly connected to the oleophilic component.

[0020] In one embodiment of this application, the sound-absorbing body includes a sound-absorbing component and a support frame that is fixedly connected to the sound-absorbing component.

[0021] According to another aspect of this application, this application further provides a range hood, comprising:

[0022] The main body of the range hood; and

[0023] The oil-proof sound-absorbing component described above is assembled on the main body of the range hood.

[0024] According to another aspect of this application, this application further provides a design method for an oil-resistant sound-absorbing component, comprising the steps of:

[0025] The heat dissipation of the anti-fouling mesh in the oil-resistant sound-absorbing component was calculated using a thermal convection calculation model.

[0026] The heat generation of the heating element in this oil-resistant sound-absorbing assembly was calculated using a heat generation calculation model; and

[0027] Based on the principle that the heat generated is greater than or equal to the heat dissipation, a minimum current model is constructed to solve for the minimum current flowing through the electric heating wire in the heating element.

[0028] In one embodiment of this application, the design method of the oil-resistant sound-absorbing component further includes the following steps:

[0029] Based on the minimum current model, a maximum current model is constructed to solve for the maximum current flowing through the heating wire in the heating element.

[0030] In one embodiment of this application, the design method of the oil-resistant sound-absorbing component further includes the following steps:

[0031] Determine whether the maximum current is less than or equal to the minimum current: if yes, optimize the material and structural parameters of the anti-fouling net and the heating wire so that the maximum current is greater than the minimum current; if no, select the actual current of the heating wire from the minimum current and the maximum current.

[0032] In one embodiment of this application, the heat convection calculation model is: Q1=kNuπDL1(Th-Tc) / λ; where: Q1 is the heat dissipation of the antifouling netting per unit time; k is the thermal conductivity of air; Nu is the Nusselt number; D is the diameter of the oleophilic component in the antifouling netting; L1 is the length of the oleophilic component; Th is the surface temperature of the oleophilic component; Tc is the air temperature; and λ is the air viscosity.

[0033] In one embodiment of this application, the heat generation calculation model is: Q2 = 4I 2 FL2 / (πd 2); where: Q2 is the heat generated by the electric heating wire per unit time; I is the current flowing through the electric heating wire; F is the resistivity of the electric heating wire; L2 is the length of the electric heating wire; d is the diameter of the electric heating wire.

[0034] In summary, even in cold environments, the heating element in this oil-resistant sound-absorbing component can heat the oleophilic component, causing the grease adhering to the surface of the anti-fouling mesh to be heated into a fluid state without solidifying, facilitating its flow under gravity. This ensures that the anti-fouling mesh of the oil-resistant sound-absorbing component can still function properly to guide the grease on the surface of the sound-absorbing material. This not only guarantees a good noise reduction effect but also significantly extends the service life of the sound-absorbing material, reduces maintenance frequency, and lowers operating costs. Attached Figure Description

[0035] Figure 1 This is a perspective view of a range hood according to an embodiment of this application;

[0036] Figure 2 A perspective cross-sectional view of a range hood according to the above embodiments of this application is shown;

[0037] Figure 3 A schematic diagram of the structure of an oil-resistant sound-absorbing component in a range hood according to the above embodiments of this application is shown;

[0038] Figure 4 A cross-sectional schematic diagram of an oil-resistant sound-absorbing assembly according to the above embodiments of this application is shown;

[0039] Figure 5 A cross-sectional schematic diagram of the oleophilic component and the heating component in the oil-resistant sound-absorbing assembly according to the above embodiments of this application is shown;

[0040] Figure 6 This is a flowchart illustrating a design method for an oil-resistant sound-absorbing component according to an embodiment of this application.

[0041] Explanation of main component symbols: 1. Range hood; 10. Range hood body; 11. Shell; 12. Fan system; 20. Oil-proof sound absorption component; 21. Sound absorption body; 211. Sound absorption part; 212. Support frame; 22. Anti-fouling mesh; 220. Oil-loving part; 23. Heating element; 230. Electric heating wire; 24. Oil guide; 240. Metal sheet.

[0042] The above description of the main component symbols, together with the accompanying drawings and specific embodiments, provides a more detailed explanation of the present invention. Detailed Implementation

[0043] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0044] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0046] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0047] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" of the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0048] While existing anti-fouling meshes can absorb grease from sound-absorbing materials, the grease may not remain in a fluid state, especially in northern regions or during low winter temperatures. Grease tends to solidify on the surfaces of the sound-absorbing material and the anti-fouling mesh, causing it to lose its fluidity and malfunctioning the entire oil-guiding mechanism, severely impacting sound absorption. Therefore, this application provides an oil-resistant sound-absorbing component, its design method, and a range hood. This component prevents grease from solidifying in most household environments, keeping it in a fluid state and ensuring the normal operation of the entire oil-guiding mechanism, thus contributing to the long-term effectiveness of the sound absorption function.

[0049] Specifically, refer to Figure 1 and Figure 2 As shown, one embodiment of this application provides a range hood 1, which may include a range hood body 10 and an oil-resistant sound-absorbing component 20 assembled on the range hood body 10 to reduce the noise of the range hood. It is understood that the range hood body 10 of this application may include a housing 11 and a fan system 12 disposed within the housing 11, and the oil-resistant sound-absorbing component 20 is disposed within the housing 11 and located in the air duct of the fan system 12. It is also understood that the range hood body 10 of this application may include, but is not limited to, components such as an oil sludge box or an oil cup to assist in completing the oil fume extraction function; these will not be elaborated upon here.

[0050] More specifically, such as Figures 3 to 5 As shown, the oil-resistant sound-absorbing component 20 may include a sound-absorbing body 21, an anti-fouling mesh 22, and a heating element 23. The anti-fouling mesh 22 includes multiple interwoven oleophilic strips 220 and covers the outer surface of the sound-absorbing body 21. The heating element 23 is correspondingly disposed on the oleophilic strips 220 to heat them, causing the grease adhering to the surface of the anti-fouling mesh 22 to be heated into a fluid state. Thus, even in cold environments, the grease adhering to the surface of the oil-resistant sound-absorbing component 20 will not solidify and can flow under gravity, ensuring that the anti-fouling mesh 22 of the oil-resistant sound-absorbing component 20 can still function normally to guide the grease on the surface of the sound-absorbing material. This not only ensures a good noise reduction effect but also significantly extends the service life of the sound-absorbing material, reduces maintenance frequency, and lowers operating costs.

[0051] For example, such as Figure 5As shown, the heating element 23 can be implemented as an electric heating wire 230 embedded in the oleophilic component 220, so as to be wrapped by the oleophilic component 220. In this way, when the electric heating wire 230 is energized, it will generate heat to better heat the oleophilic component 220, ensuring that the grease adhering to the surface of the oleophilic component 220 is heated and remains in a flowing state. It is worth noting that the electric heating wire 230 can be, but is not limited to, a resistance wire or an electric heating wire, to generate heat when an electric current is applied.

[0052] Optionally, such as Figure 5 As shown, both the oleophilic component 220 and the electric heating wire 230 have a circular cross-section. The electric heating wire 230 and the oleophilic component 220 are arranged concentrically, so that the surface temperature of the oleophilic component 220 remains uniform.

[0053] Optionally, such as Figure 5 As shown, the diameter D of the oleophilic component 220 is between 0.5 mm and 1 mm in order to meet the requirements of oil conductivity and structural rigidity.

[0054] Optionally, such as Figure 3 and Figure 4 As shown, the oil-proof sound-absorbing component 20 further includes an oil guide 24, which is inclinedly arranged below the anti-fouling cover 22 to guide the grease flowing down from the anti-fouling cover 22 into the oil cup.

[0055] Optionally, such as Figure 3 and Figure 4 As shown, the oil guiding element 24 is implemented as a metal sheet 240 fixedly connected to the oleophilic component 220. In this way, the heating element 23 heats the metal sheet 240 while heating the oleophilic component 220, so as to prevent grease from condensing on the metal sheet 240 and to better guide the flow of grease.

[0056] According to the above embodiments of this application, as Figure 3 and Figure 4 As shown, the sound-absorbing body 21 in the oil-resistant sound-absorbing assembly 20 may include a sound-absorbing component 211 and a support frame 212 fixedly connected to the sound-absorbing component 211, so as to support the sound-absorbing component 211 through the support frame 212. It is understood that the sound-absorbing component 211 mentioned in this application may be made of, but is not limited to, sound-absorbing materials such as fibers, foam or plastics; at the same time, the oleophilic component 220 mentioned in this application may be made of, but is not limited to, oleophilic materials such as cotton, linen fibers or porous silicone, as long as it is ensured that the oleophilic component 220 has a greater adsorption effect on grease than the sound-absorbing component 211 has a greater adsorption effect on grease.

[0057] It is worth noting that since the heating element 23 in the oil-proof sound-absorbing component 20 of this application converts electrical energy into heat when energized, this application needs to provide a method for designing the oil-proof sound-absorbing component 20 in order to control the magnitude of the current to achieve energy-saving effect. That is, the heat generated by the heating element 23 is just enough to ensure that grease does not solidify in most household environments, while not generating too much heat to cause energy waste or safety problems.

[0058] Based on this, according to another aspect of this application, such as Figure 6 As shown, one embodiment of this application further provides a design method for an oil-resistant sound-absorbing component, which may include the following steps:

[0059] S100: Calculate the heat dissipation of the anti-fouling mesh in the oil-resistant sound-absorbing component using a thermal convection calculation model;

[0060] S200: Calculate the heat generation of the heating element in this oil-resistant sound-absorbing assembly using a heat generation calculation model; and

[0061] S300: Based on the principle that the heat generation is greater than or equal to the heat dissipation, a minimum current model is constructed to solve for the minimum current flowing through the electric heating wire in the heating element.

[0062] For example, since the antifouling mesh of this application is made of several strips of oleophilic components wrapped with electric heating wires interwoven together, its surface temperature should be relatively stable in order to ensure the fluidity of the grease. Therefore, the heat dissipation problem of the antifouling mesh of this application can be simplified to the heat dissipation problem of a cylinder with a constant surface temperature in an airflow. That is, in step S100 of this application: when low-temperature gas blows over a warm oleophilic component (with a cylindrical structure), the heat carried away per unit time is mainly related to factors such as gas temperature, gas flow rate, surface area of ​​the cylinder, and surface temperature of the cylinder.

[0063] The heat carried away by the low-temperature gas from the surface of the cylinder per unit time is estimated using Newton's law of cooling: Q1 = h * A(Th - Tc), where: Q1 is the heat carried away by the gas from the surface of the oleophilic component per unit time; h is the heat transfer coefficient, which is related to factors such as gas flow rate and can be calculated using subsequent formulas; A = πDL1 is the surface area of ​​the oleophilic component, which can be calculated from the diameter D and length L1 of the cylinder; Th is the surface temperature of the oleophilic component, which usually needs to be above 20℃ to maintain good fluidity of the grease; Tc is the gas temperature, which depends on the minimum indoor temperature of the range hood environment, which is usually not lower than -10℃.

[0064] It is worth noting that when the airflow velocity V is low, heat transfer from the fluid to the object mainly relies on conduction and natural convection; when the airflow velocity V is high, heat transfer from the fluid to the object mainly relies on forced convection, and the calculation methods for the heat transfer coefficient differ. However, in this application, considering that heat dissipation is fastest when there is airflow blowing in the flow channel of the range hood, heat dissipation caused by forced convection dominates at this time. Therefore, the heat transfer coefficient h of this application can be expressed as: h=kNu / λ; where: k represents the thermal conductivity of the gas, and the thermal conductivity of air at -10℃ is usually between 0.016W / (m·K) and 0.027W / (m·K); λ represents the viscosity of the gas, and the viscosity of air at -10℃ is usually 1.2*10 -5 Pa*s and 1.7*10 -5 Between Pa*s; Nu represents the Nusselt number, which is related to the airflow velocity V.

[0065] Specifically, the relationship between the Nusselt number Nu and the airflow velocity V can be expressed as: Nu = C * Re m *Pr n Where: Pr represents the Prandtl number, which is typically between 0.7 and 0.8 for air at -10℃; C, m, and n are experimental coefficients, with C typically between 0.023 and 0.036, m typically between 0.5 and 1.2, and n typically between 0.33 and 0.45; Re represents the Reynolds number, the formula for which needs to be selected based on the fluid's motion state.

[0066] Since the simplified model in this application is a cylindrical turbulence problem, the formula for calculating the Reynolds number in this application can be implemented as: Re = ρVD / μ; where: ρ represents the density of the gas, and the density of air at -10℃ is typically 1.268 kg / m³. 3 Up to 1.274 kg / m 3 V represents the airflow velocity of the oleophilic component, which is typically between 3 m / s and 10 m / s in a range hood; D represents the diameter of the oleophilic component, which depends on the structure of the strip-shaped oleophilic material wrapping the heating element in the anti-fouling mesh, and is usually determined by requirements such as oil conductivity and rigidity, preferably between 0.5 mm and 1 mm; μ represents the dynamic viscosity of the gas, which is typically 1.44 × 10⁻⁶ for air at -10°C. -5 m 2 / s to 1.66*10 -5 m 2 Between / s.

[0067] In summary, by obtaining the gas flow velocity V through measurement and simulation, the Reynolds number Re and Prandtl number Pr are first calculated, then the Nusselt number Nu is calculated, and finally the heat transfer coefficient h is calculated. Finally, using the thermal convection equation, the heat transfer from the fluid to the object per unit time can be calculated, i.e., Q1 = h * A(Th - Tc) = kNuA(Th - Tc) / λ. In other words, the thermal convection calculation model of this application can be implemented as: Q1 = kNuπDL1(Th - Tc) / λ; where: Q1 is the heat dissipation of the antifouling mesh per unit time; k is the thermal conductivity of air; Nu is the Nusselt number; D is the diameter of the oleophilic component in the antifouling mesh; L1 is the length of the oleophilic component; Th is the surface temperature of the oleophilic component; Tc is the air temperature; and λ is the air viscosity.

[0068] In step S200 of this application: the heat generation of the heating element needs to consider parameters such as current intensity, resistivity, length L and diameter d of the heating wire. Specifically, the heat generated by the heating element per unit time is Q2 = I. 2 R; where: I represents current; R represents resistance. For an electric heating wire with length L2 and diameter d, its resistance can be expressed as: R = FL2 / A; where F is the resistivity of the electric heating wire; A represents the cross-sectional area of ​​the electric heating wire, which can be calculated from the diameter d of the resistance wire, i.e., A = πd. 2 / 4.

[0069] In summary, the heat generation calculation model of this application can be implemented as: Q2 = 4I 2 FL2 / (πd 2 Where: Q2 is the heat generated by the heating wire in the heating element per unit time; I is the current flowing through the heating wire; F is the resistivity of the heating wire; L2 is the length of the heating wire; and d is the diameter of the heating wire. It is understood that since the oleophilic component of this application is wrapped around the heating wire, the length L1 of the oleophilic component is equal to the length L2 of the heating wire, i.e., L1 = L2.

[0070] It is worth noting that in order to prevent the grease adhering to the surface of the antifouling mesh from solidifying and to maintain good fluidity, the heat generated by the heating element needs to be greater than or equal to the heat dissipation of the antifouling mesh. Therefore, the heat conservation model constructed in this application based on the principle that the heat generated equals the heat dissipation can solve for the minimum current supplied to the heating element, so as to use the smallest possible current to achieve the effect of preventing grease from solidifying, reduce energy consumption, and achieve the purpose of energy saving.

[0071] In step S300 of this application: Let Q1≤Q2, that is: kNuπDL1(Th-Tc) / λ≤4I 2 FL2 / (πd 2After simplification, a minimum current model can be constructed, which can be implemented as follows:

[0072]

[0073] Among them: I min The values ​​represent the minimum current flowing through the heating wire in the heating element; k, Nu, and λ represent the thermal conductivity, Nusselt number, and viscosity of air at temperature Tc, respectively; D is the diameter of the oleophilic component in the antifouling mesh; Th is the surface temperature of the oleophilic component; Tc is the first air temperature; d is the diameter of the heating wire; and F is the resistivity of the heating wire. It is understood that the first air temperature Tc mentioned in this application refers to the air temperature in a cold environment, typically around -10°C.

[0074] It is worth noting that when the current flowing through the heating wire in the heating element is greater than or equal to the aforementioned minimum current Imin, the grease adhering to the anti-fouling mesh can maintain good fluidity and prevent condensation even in cold environments. However, the working environment of a range hood also includes hot weather. If the current flowing through the heating wire in the heating element is too large, it will cause the oleophilic component in the anti-fouling mesh to overheat, which will damage the oleophilic material and pose a safety hazard. Therefore, when designing the anti-oil-fouling sound-absorbing component, this application should also determine the safe current value to ascertain the maximum current.

[0075] Specifically, such as Figure 6 As shown, the design method of the oil-resistant sound-absorbing component of this application may further include the following steps:

[0076] S400: Based on the minimum current model, construct the maximum current model to solve for the maximum current flowing through the heating wire in the heating element.

[0077] More specifically, the maximum current model can be implemented as follows:

[0078]

[0079] Among them: I max This indicates the maximum current flowing through the heating wire in the heating element; k H Nu H and λ H These are air at temperature Tc H The following parameters are considered: thermal conductivity, Nusselt number, and viscosity; D is the diameter of the oleophilic component in the antifouling net; Th H The highest temperature that this oleophilic component can withstand; Tc H d is the second air temperature; d is the diameter of the heating wire; F is the resistivity of the heating wire; and K is the safety factor. It is understood that the second air temperature Tc mentioned in this application... HThis refers to the air temperature in a hot environment, which is usually no higher than 50°C.

[0080] It is worth noting that the safety factor K mentioned in this application is a correction that takes into account the fact that the internal temperature is slightly higher than the external temperature, and its value is usually between 0.6 and 0.7.

[0081] Furthermore, if I appears through calculation max ≤I min In such cases, the materials and structural parameters of the anti-fouling net and the electric heating wire should be optimized to avoid safety hazards. In other words, if... Figure 6 As shown, the design method of the oil-resistant sound-absorbing component of this application may further include the following steps:

[0082] S500: Determine whether the maximum current is less than or equal to the minimum current. If yes, optimize the material and structural parameters of the anti-fouling net and the electric heating wire so that the maximum current is greater than the minimum current. If no, select the actual current of the electric heating wire from the minimum current and the maximum current.

[0083] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0084] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. An oil-resistant sound-absorbing component, characterized in that, include: Sound-absorbing body; The anti-fouling mesh comprises multiple interwoven oleophilic components and covers the outer surface of the sound-absorbing body; as well as A heating element is correspondingly disposed on the oleophilic component to heat the oleophilic component.

2. The oil-resistant sound-absorbing component according to claim 1, characterized in that, The heating element is an electric heating wire embedded in the oleophilic component.

3. The oil-resistant sound-absorbing component according to claim 2, characterized in that, Both the oleophilic component and the electric heating wire have a circular cross-section, and the electric heating wire and the oleophilic component are arranged concentrically.

4. The oil-resistant sound-absorbing component according to claim 3, characterized in that, The diameter of the oleophilic part is between 0.5 mm and 1 mm.

5. The oil-resistant sound-absorbing component according to claim 2, characterized in that, The minimum current supplied to the heating wire satisfies the following relationship: ； Among them: I min The minimum current flowing through the heating wire is represented by k, Nu, and λ, which are the thermal conductivity, Nusselt number, and viscosity of air at the first air temperature Tc, respectively; D is the diameter of the oleophilic component; Th is the surface temperature of the oleophilic component; Tc is the first air temperature; d is the diameter of the heating wire; and F is the resistivity of the heating wire.

6. The oil-resistant sound-absorbing component according to claim 2, characterized in that, The maximum current flowing through the electric heating wire satisfies the following relationship: ； Among them: I max This indicates the maximum current flowing through the heating wire; k H Nu H and λ H The second air temperature Tc is respectively H The thermal conductivity, Nusselt number, and viscosity of the material; D is the diameter of the oleophilic component; Th H Tc is the highest temperature that the oleophilic part can withstand. H d is the second air temperature; d is the diameter of the electric heating wire; F is the resistivity of the electric heating wire; K is the safety factor.

7. The oil-resistant sound-absorbing component according to any one of claims 1 to 6, characterized in that, It also includes an oil-guiding component, which is inclinedly arranged below the anti-fouling netting; the oil-guiding component is a metal sheet fixedly connected to the oleophilic component.

8. The oil-resistant sound-absorbing component according to any one of claims 1 to 6, characterized in that, The sound-absorbing body includes a sound-absorbing component and a support frame that is fixedly connected to the sound-absorbing component.

9. A range hood, characterized in that, include: The main body of the range hood; and The oil-resistant sound-absorbing component as described in any one of claims 1 to 8 is assembled on the main body of the range hood.

10. A design method for an oil-resistant sound-absorbing component, used in the oil-resistant sound-absorbing component as described in any one of claims 1 to 8, characterized in that, Including the following steps: The heat dissipation of the anti-fouling mesh in the oil-resistant sound-absorbing component was calculated using a thermal convection calculation model. The heat generation of the heating element in the oil-resistant sound-absorbing component is calculated using a heat generation calculation model. as well as Based on the principle that the heat generated is greater than or equal to the heat dissipation, a minimum current model is constructed to solve for the minimum current flowing through the electric heating wire in the heating element.

11. The design method of the oil-resistant sound-absorbing component according to claim 10, characterized in that, It also includes the following steps: Based on the minimum current model, a maximum current model is constructed to solve for the maximum current flowing through the heating wire in the heating element.

12. The design method of the oil-resistant sound-absorbing component according to claim 11, characterized in that, It also includes the following steps: Determine whether the maximum current is less than or equal to the minimum current: if so, optimize the material and structural parameters of the anti-fouling net and the heating wire so that the maximum current is greater than the minimum current. If not, then the actual current supplied to the heating wire shall be selected from the minimum current supplied and the maximum current supplied.

13. The design method of the oil-resistant sound-absorbing component according to any one of claims 10 to 12, characterized in that, The heat convection calculation model is: Q1=kNuπDL1(Th-Tc) / λ; where: Q1 is the heat dissipation of the antifouling net per unit time; k is the thermal conductivity of air; Nu is the Nusselt number; D is the diameter of the oleophilic component in the antifouling net; L1 is the length of the oleophilic component; Th is the surface temperature of the oleophilic component; Tc is the air temperature; and λ is the air viscosity.

14. The design method of the oil-resistant sound-absorbing component according to any one of claims 10 to 12, characterized in that, The heat generation calculation model is: Q2=4I 2 FL2 / (πd 2 (), where: Q2 is the heat generated by the heating wire per unit time; I is the current flowing through the heating wire; F is the resistivity of the heating wire; L2 is the length of the heating wire; d is the diameter of the heating wire.

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