Range hood impeller and range hood

Abstract

The present application relates to the technical field of kitchen appliances, and discloses an oil fume machine impeller and an oil fume machine. The oil fume machine impeller comprises a disc and blades arranged on the disc, and a hydrophilic and oleophobic layer is sprayed on the disc and the blades. The hydrophilic and oleophobic layer comprises a hydrophilic and oleophobic polymer and a first diluent. The hydrophilic and oleophobic polymer comprises a Tio2 polymer, a fluorine-containing surfactant and inorganic nanoparticles. The presence of the hydrophilic and oleophobic layer enables the disc and the blades to have both hydrophilicity and oleophobicity. When an oil-water mixture contacts the surface of the disc and the blades, water can permeate the surface of the disc and the blades to be in a super-hydrophilic state, while oil is in a super-oleophobic state, and water is located between oil and the surface material, thereby isolating oil from the surface material. When the impeller rotates, the oil on the surface of the disc and the blades can be thrown away, achieving a self-cleaning effect, avoiding the accumulation of oil stains on the impeller, reducing the energy consumption of the oil fume machine, ensuring the smoke exhaust effect while reducing the cleaning frequency of the oil fume machine, and improving the user experience.

Description

Technical Field

[0001] This invention relates to the field of kitchen appliance technology, and in particular to a range hood impeller and a range hood. Background Technology

[0002] A range hood is a kitchen appliance that purifies the kitchen environment. It can remove waste from the stove and cooking fumes and exhaust them outdoors, purifying the kitchen air and protecting the health of users.

[0003] In existing technology, range hoods typically include a casing, duct, impeller, and motor. The motor drives the impeller to rotate, generating negative pressure, which then expels cooking fumes through the duct. As the range hood is used over time, a significant amount of grease accumulates on the impeller. If this grease is not cleaned promptly, it increases the impeller's rotational resistance, leading to increased motor wear and tear. Simultaneously, the noise level of the range hood increases, negatively impacting the user experience. Furthermore, excessive grease buildup on the impeller and duct can obstruct exhaust flow, affecting the range hood's smoke extraction efficiency. Moreover, long-term accumulation of grease can lead to oxidation, forming acidic substances that corrode and rust the range hood, shortening its lifespan. Current methods for cleaning range hoods typically involve manual cleaning with detergent, steam, or soapy water, which is difficult and time-consuming.

[0004] Therefore, there is an urgent need for a range hood impeller and a range hood to solve the above problems. Summary of the Invention

[0005] Based on the above problems, the purpose of this invention is to provide a range hood impeller and a range hood, wherein the range hood impeller can achieve self-cleaning, avoid the accumulation of oil on the impeller, thereby reducing the overall energy consumption of the range hood, ensuring the smoke extraction effect, reducing the frequency of range hood cleaning, and improving the user experience.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] On one hand, a range hood impeller is provided, including a disc and blades disposed on the disc. Both the disc and the blades are coated with a hydrophilic and oleophobic layer. The hydrophilic and oleophobic layer includes a hydrophilic and oleophobic polymer and a first diluent. The hydrophilic and oleophobic polymer includes a TiO2 polymer, a fluorinated surfactant, and inorganic nanoparticles.

[0008] As a preferred embodiment of the range hood impeller of the present invention, the method for manufacturing the hydrophilic and oleophobic polymer includes the following steps:

[0009] The TiO2 polymer, the fluorinated surfactant, and the inorganic nanoparticles are added to a flask in a first preset ratio and stirred until homogeneous to obtain a mixture.

[0010] The mixture is added to a reaction vessel and heated in a water bath at a preset temperature for time T1 to obtain the hydrophilic and oleophobic polymer.

[0011] As a preferred embodiment of the range hood impeller of the present invention, the first preset ratio is: 40% to 50% of the TiO2 polymer, 10% to 20% of the fluorinated surfactant and 40% to 50% of the inorganic nanoparticles, the preset temperature of the water bath heating is 35°C, and the value range of T1 is 30 min to 60 min.

[0012] As a preferred embodiment of the range hood impeller of the present invention, the method for preparing the hydrophilic and oleophobic coating liquid includes the following steps:

[0013] A predetermined amount of the first diluent is added to the hydrophilic-oleophobic polymer to obtain the stock solution of the hydrophilic-oleophobic layer;

[0014] The stock solution and the second diluent are mixed in a second preset ratio to obtain the spray solution for the hydrophilic and oleophobic layer.

[0015] As a preferred embodiment of the range hood impeller of the present invention, the first diluent is methoxy-nonafluorobutane, and the preset dosage of the first diluent is 80% to 85%. The second diluent includes fluorocarbon ether and hexafluoropropylene trimer, and the second preset ratio is: 0.5% to 1% of the stock solution, 45% to 50% of the fluorocarbon ether and 45% to 50% of the hexafluoropropylene trimer.

[0016] As a preferred embodiment of the range hood impeller of the present invention, the step of spraying the coating liquid onto the impeller disc and the blades includes:

[0017] H1. Spray the adhesive and wait for time T2, the thickness of the adhesive being D;

[0018] H2. Spray the coating liquid;

[0019] H3. Move the sprayed range hood impeller into the tunnel oven for curing for time T3.

[0020] As a preferred embodiment of the range hood impeller of the present invention, the thickness D of the adhesive is in the range of 2μm to 3μm, the range hood impeller after spraying is left to stand at room temperature for a time T2, the value of T2 is in the range of 10min to 20min, the curing temperature in the tunnel oven is 150℃, and the value of T3 is 30min.

[0021] As a preferred embodiment of the range hood impeller of the present invention, the impeller and the blades undergo the following pretreatment steps before being coated with the hydrophilic and oleophobic coating liquid:

[0022] S1, First preset time for pure water rinsing;

[0023] S2, Pre-degreasing second preset time;

[0024] S3, the third preset time for main degreasing;

[0025] S4, fourth preset time for hot water cleaning;

[0026] S5, fifth preset drying time.

[0027] As a preferred embodiment of the range hood impeller of the present invention, in step S1, the pure water cleaning is carried out with clean water at 50℃~60℃, and the first preset time is 1min~2min.

[0028] In step S2, pre-degreasing is performed using a degreasing agent at 45℃~60℃, and the second preset time is 1min~2min;

[0029] In step S3, the primary degreasing is performed using a degreasing agent at 50℃~65℃, and the third preset time is 3min~5min;

[0030] In step S4, hot water at 22℃~30℃ is used for cleaning, and the fourth preset time is 3min~5min;

[0031] In step S5, the drying temperature is 100℃~150℃, and the fifth preset time is 2min~5min.

[0032] As a preferred embodiment of the range hood impeller of the present invention, the degreasing agent includes disodium silicate, sodium carbonate, sodium hydroxide and ethylenediaminetetraacetic acid tetrasodium salt, wherein the disodium silicate accounts for 20% to 30%, the sodium carbonate accounts for 20% to 30%, the sodium hydroxide accounts for 20% to 25%, and the ethylenediaminetetraacetic acid tetrasodium salt accounts for 4% to 15%.

[0033] On the other hand, a range hood is provided, including the range hood impeller as described above.

[0034] The beneficial effects of this invention are as follows:

[0035] The range hood impeller and range hood provided by this invention utilize a hydrophilic and oleophobic layer sprayed onto the substrate surface of the impeller and blades, giving the impeller and blades both hydrophilic and oleophobic properties. When an oil-water mixture comes into contact with the surface of the impeller and blades, the presence of the hydrophilic and oleophobic layer allows water to penetrate to the surface of the impeller and blades, exhibiting a superphilic state, while the oil exhibits a superphobic state, meaning the water is located between the oil and the surface material of the impeller and blades, thus isolating the oil from the surface material. When the impeller rotates at high speed, centrifugal force can dislodge the oil from the surface of the impeller and blades, achieving a self-cleaning effect. In other words, by spraying a hydrophilic and oleophobic layer onto the substrate surface of the impeller and blades, this range hood impeller can prevent the accumulation of oil stains on the impeller, thereby reducing the overall energy consumption of the range hood, ensuring smoke extraction performance while reducing the frequency of cleaning, and improving the user experience. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the structure of the wheel and blades provided in a specific embodiment of the present invention.

[0038] In the picture:

[0039] 1-Disc; 2-Blade; 3-Hydrophilic and oleophobic layer. Detailed Implementation

[0040] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., 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 the invention and for 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 the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0042] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0043] This embodiment provides a range hood impeller, applied to a range hood. (See also...) Figure 1 The range hood impeller includes a disc 1 and blades 2 disposed on the disc 1. Both the disc 1 and the blades 2 are coated with a hydrophilic and oleophobic layer 3. The hydrophilic and oleophobic layer 3 includes a hydrophilic and oleophobic polymer and a first diluent. The hydrophilic and oleophobic polymer includes TiO2 polymer, fluorinated surfactant and inorganic nanoparticles.

[0044] The range hood impeller provided in this embodiment, by spraying a hydrophilic and oleophobic layer 3 onto the substrate surfaces of the impeller 1 and blades 2, makes the impeller 1 and blades 2 both hydrophilic and oleophobic. When an oil-water mixture comes into contact with the surfaces of the impeller 1 and blades 2, the presence of the hydrophilic and oleophobic layer 3 allows water to penetrate to the surfaces of the impeller 1 and blades 2, exhibiting a superphilic state, while the oil exhibits a superphobic state, meaning the water is located between the oil and the surface materials of the impeller 1 and blades 2, thus isolating the oil from the surface materials. When the impeller rotates at high speed, the centrifugal force can throw off the oil on the surfaces of the impeller 1 and blades 2, achieving a self-cleaning effect. In other words, by spraying a hydrophilic and oleophobic layer 3 onto the substrate surfaces of the impeller 1 and blades 2, this range hood impeller can prevent the accumulation of oil stains on the impeller, thereby reducing the overall energy consumption of the range hood, ensuring the smoke extraction effect while reducing the frequency of cleaning the range hood, and improving the user experience.

[0045] In this embodiment, the method for preparing the hydrophilic-oleophobic polymer includes the following steps:

[0046] W1. Add TiO2 polymer, fluorinated surfactant and inorganic nanoparticles to a flask according to a first preset ratio and stir until homogeneous to obtain a mixture;

[0047] W2. Add the mixture to the reactor and heat it in a water bath at a preset temperature for time T1 to obtain a hydrophilic and oleophobic polymer.

[0048] In step W1, the first preset ratio is: 40%–50% TiO2 polymer, 10%–20% fluorinated surfactant, and 40%–50% inorganic nanoparticles. In this embodiment, the first preset ratio is based on the weight ratio of the three substances. The preset temperature for water bath heating is 35°C, and the value of T1 ranges from 30 min to 60 min.

[0049] Preferably, the fluorinated surfactant is a short-chain fluoropolymer. Fluoropolymers have extremely low surface polarity, which can achieve a good non-stick effect.

[0050] Furthermore, the method for preparing the spraying liquid for the hydrophilic-oleophobic layer 3 includes the following steps:

[0051] R1. Add a predetermined amount of first diluent to the hydrophilic-oleophobic polymer to obtain the stock solution of hydrophilic-oleophobic layer 3;

[0052] R2. Mix the stock solution and the second diluent according to the second preset ratio to obtain the spray solution of the hydrophilic and oleophobic layer 3.

[0053] In step R1, the first diluent is methoxy-nonafluorobutane (HFE7200), and the preset dosage of the first diluent is 80% to 85%. Increasing the amount of the first diluent makes the original solution of the hydrophilic-oleophobic layer 3 easier to spray evenly, ensuring the surface quality of the wheel disk 1 and the blade 2. After the hydrophilic-oleophobic layer 3 cures, the first diluent can evaporate.

[0054] In step R2, the second diluent comprises fluorocarbon ether and hexafluoropropylene trimer, and the second preset ratio is: 0.5%–1% of the stock solution, 45%–50% of the fluorocarbon ether, and 45%–50% of the hexafluoropropylene trimer. By adding the second diluent to the stock solution of the hydrophilic-oleophobic layer 3, the use of the stock solution for spraying can be avoided, reducing waste and saving costs.

[0055] In this embodiment, the step of spraying the coating liquid onto the wheel 1 and the blade 2 includes:

[0056] H1. Spray the adhesive and wait for time T2. The thickness of the adhesive is D.

[0057] H2, spraying liquid;

[0058] H3. Move the sprayed range hood impeller into the tunnel oven for curing for time T3.

[0059] In step H1, the thickness D of the adhesive ranges from 2μm to 3μm, and the range hood impeller is left to stand at room temperature for a time T2, ranging from 10min to 20min. Applying the adhesive allows the hydrophilic-oleophobic layer 3 to adhere more firmly to the surfaces of the disc 1 and the impeller, improving its mechanical durability and extending its service life. Furthermore, constructing the hydrophilic-oleophobic layer 3 through spraying allows the functional particles of the spray liquid to mix evenly with the viscous particles in the adhesive, effectively improving the wear resistance of the hydrophilic-oleophobic layer 3 and maintaining its excellent superhydrophilic and superoleophobic properties.

[0060] Alternatively, the adhesive may be one or both of epoxy resin or polyacrylic resin.

[0061] In step H2, the curing temperature in the tunnel oven is 150°C, and T3 is 30 minutes. In other embodiments, the curing temperature and curing time can be adjusted according to the amount of sprayed liquid and the thickness of the adhesive.

[0062] Optionally, the spraying liquid can be applied by a robotic arm or the like. For example, the spraying atomization pressure of the spraying liquid is 1.1 MPa, the distance between the nozzle and the wheel 1 and the blade 2 is 500 mm, and the nozzle output can be 60 g / min.

[0063] Furthermore, before the hydrophilic-oleophobic coating 3 is applied to the disk 1 and blade 2, the following pretreatment steps are performed:

[0064] S1, First preset time for pure water rinsing;

[0065] S2, Pre-degreasing second preset time;

[0066] S3, the third preset time for main degreasing;

[0067] S4, fourth preset time for hot water cleaning;

[0068] S5, fifth preset drying time.

[0069] In step S1, the pure water cleaning is carried out using clean water at 50℃~60℃, and the first preset time is 1min~2min.

[0070] In step S2, pre-degreasing is performed using a degreasing agent at 45℃~60℃, and the second preset time is 1min~2min;

[0071] In step S3, the primary degreasing is performed using a degreasing agent at 50℃~65℃, and the third preset time is 3min~5min;

[0072] In step S4, hot water at 22℃~30℃ is used for cleaning, and the fourth preset time is 3min~5min;

[0073] In step S5, the drying temperature is 100℃~150℃, and the fifth preset time is 2min~5min.

[0074] Optionally, the degreasing agent includes disodium silicate, sodium carbonate, sodium hydroxide, and tetrasodium ethylenediaminetetraacetate, wherein disodium silicate accounts for 20%–30%, sodium carbonate accounts for 20%–30%, sodium hydroxide accounts for 20%–25%, and tetrasodium ethylenediaminetetraacetate accounts for 4%–15%. For example, the degreasing agent may be BONDERITE C-AK1523.

[0075] To verify the hydrophilic and oleophobic effects of the hydrophilic-oleophobic layer 3, including its adhesion and abrasion resistance, the aforementioned coating liquid was sprayed onto the test specimen to form the hydrophilic-oleophobic layer 3, and the following tests were conducted:

[0076] (1) Superhydrophilic and superoleophobic test: A special hydrophilic and oleophobic test device was used to test the material surface of the test piece. 2 μl of deionized water was dropped on the surface of the test piece. The water droplet angle obtained by the test was 0°, indicating that the hydrophilic and oleophobic layer 3 has superhydrophilicity. Then, 2 μl of n-hexadecane (oil droplet) was dropped on the surface of the test piece. The oil droplet angle obtained by the test was 160°, indicating that the hydrophilic and oleophobic layer 3 has superoleophobicity.

[0077] (2) Adhesion Test: Using a cutting tool, cut along a direction perpendicular to the surface of the test piece, maintaining uniform force on the tool, and draw 6 parallel first cutting lines (the spacing between each cutting line is 1 mm) at the same cutting speed; repeat the above operation, and then cut 6 parallel second cutting lines along a direction perpendicular to the first cutting lines, with the first and second cutting lines intersecting at a 90° angle to form a grid. All cutting lines should penetrate to the metal surface of the test piece. Then, press the pressure-sensitive adhesive onto the part above the grid and rub the adhesive tape firmly with your fingertips to make the tape effectively contact the surface of the test piece. After about 5 minutes, hold one end of the tape suspended in the air and peel off the tape while maintaining an angle of approximately 60° with the surface of the test piece, peeling off the tape smoothly at a speed of 0.5s to 1.0s. The test results showed that the adhesion was grade 0, meaning that the cut edges were completely smooth and there was no peeling at all from the grid edges (refer to the cross-cut test of paint and varnish film in GB / T 9286), indicating that the hydrophilic and oleophobic layer 3 has good adhesion.

[0078] (3) Friction resistance test: Using a robotic arm, 0000# steel wool is used. The friction area is 10mm x 10mm. A force of 1000g is applied at a speed of 60 cycles / min and a stroke of 60mm. The test is conducted for 1000 / 2000 / 3000 cycles. After the test, the surface of the test piece can still maintain the superhydrophilic and superoleophobic properties.

[0079] Therefore, after spraying the hydrophilic and oleophobic layer 3 onto the impeller, the impeller can be self-cleaning, reducing the frequency of cleaning the range hood and ensuring the exhaust effect of the range hood. At the same time, the wear resistance and durability of the hydrophilic and oleophobic layer 3 can be guaranteed, resulting in a long service life.

[0080] This embodiment also provides a range hood, including the range hood impeller as described above. By spraying a hydrophilic and oleophobic layer 3 onto the substrate surfaces of the impeller 1 and blades 2, the impeller 1 and blades 2 simultaneously possess hydrophilicity and oleophobicity. When an oil-water mixture comes into contact with the surfaces of the impeller 1 and blades 2, due to the presence of the hydrophilic and oleophobic layer 3, water can penetrate to the surfaces of the impeller 1 and blades 2, exhibiting a superphilic state, while oil exhibits a superphobic state, meaning the water is located between the oil and the surface materials of the impeller 1 and blades 2, thus isolating the oil from the surface materials. When the impeller rotates at high speed, under the action of centrifugal force, it can throw off the oil on the surfaces of the impeller 1 and blades 2, achieving a self-cleaning effect. In other words, by spraying a hydrophilic and oleophobic layer 3 onto the substrate surfaces of the impeller 1 and blades 2, this range hood impeller can prevent the accumulation of oil stains on the impeller, thereby reducing the overall energy consumption of the range hood, ensuring the smoke extraction effect while reducing the frequency of cleaning the range hood, and improving the user experience.

[0081] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A range hood impeller, characterized in that, It includes a wheel (1) and blades (2) disposed on the wheel (1). Both the wheel (1) and the blades (2) are coated with a hydrophilic and oleophobic layer (3). The hydrophilic and oleophobic layer (3) includes a hydrophilic and oleophobic polymer and a first diluent. The hydrophilic and oleophobic polymer includes TiO2 polymer, fluorinated surfactant and inorganic nanoparticles. The method for preparing the hydrophilic-oleophobic polymer includes the following steps: The TiO2 polymer, the fluorinated surfactant, and the inorganic nanoparticles are added to a flask in a first preset ratio and stirred until homogeneous to obtain a mixture. The mixture is added to a reaction vessel and heated in a water bath at a preset temperature for time T1 to obtain the hydrophilic and oleophobic polymer; The first preset ratio is: 40% to 50% of the TiO2 polymer, 10% to 20% of the fluorinated surfactant and 40% to 50% of the inorganic nanoparticles, the preset temperature of the water bath heating is 35°C, and the value of T1 is in the range of 30 min to 60 min.

2. The range hood impeller according to claim 1, characterized in that, The method for preparing the spraying liquid for the hydrophilic and oleophobic layer (3) includes the following steps: A predetermined amount of the first diluent is added to the hydrophilic and oleophobic polymer to obtain the stock solution of the hydrophilic and oleophobic layer (3); The stock solution and the second diluent are mixed in a second preset ratio to obtain the spray solution of the hydrophilic and oleophobic layer (3).

3. The range hood impeller according to claim 2, characterized in that, The first diluent is methoxy-nonafluorobutane, the second diluent includes fluorocarbon ether and hexafluoropropylene trimer, and the second preset ratio is: 0.5% to 1% of the stock solution, 45% to 50% of the fluorocarbon ether and 45% to 50% of the hexafluoropropylene trimer.

4. The range hood impeller according to claim 2, characterized in that, The step of spraying the coating liquid onto the wheel (1) and the blade (2) includes: H1. Spray the adhesive and wait for time T2, the thickness of the adhesive being D; H2. Spray the coating liquid; H3. Move the sprayed range hood impeller into the tunnel oven for curing for time T3.

5. The range hood impeller according to claim 4, characterized in that, The thickness D of the adhesive is in the range of 2μm to 3μm. The range 2 is 10min to 20min. The curing temperature in the tunnel oven is 150℃ and the curing time T3 is 30min.

6. The range hood impeller according to claim 1, characterized in that, Before the spraying liquid for the hydrophilic and oleophobic layer (3) is applied, the wheel (1) and the blade (2) undergo the following pretreatment steps: S1, First preset time for pure water rinsing; S2, Pre-defatting second preset time; S3, the third preset time for main degreasing; S4, fourth preset time for hot water cleaning; S5, fifth preset drying time.

7. The range hood impeller according to claim 6, characterized in that, In step S1, the pure water cleaning is carried out using clean water at 50℃~60℃, and the first preset time is 1min~2min; In step S2, pre-degreasing is performed using a degreasing agent at 45℃~60℃, and the second preset time is 1min~2min; In step S3, the primary degreasing is performed using a degreasing agent at 50℃~65℃, and the third preset time is 3min~5min; In step S4, hot water at 22℃~30℃ is used for cleaning, and the fourth preset time is 3min~5min; In step S5, the drying temperature is 100℃~150℃, and the fifth preset time is 2min~5min.

8. The range hood impeller according to claim 7, characterized in that, The degreasing agent comprises disodium silicate, sodium carbonate, sodium hydroxide, and tetrasodium ethylenediaminetetraacetic acid (EDTA), wherein the disodium silicate accounts for 20%–30%, the sodium carbonate accounts for 20%–30%, the sodium hydroxide accounts for 20%–25%, and the tetrasodium ethylenediaminetetraacetic acid (EDTA) accounts for 4%–15%.

9. A range hood, characterized in that, Including the range hood impeller as described in any one of claims 1-8.

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