Lampblack treatment method, storage medium and range hood

Abstract

The cooking fume treatment method is characterized in that a coil is arranged on the outer side close to a cooking fume inlet; when oil smoke is sucked, the coil is electrified to generate a magnetic field; detecting and acquiring the smoke inlet wind speed Vy and the smoke inlet wind direction angle theta y of the oil smoke inlet in real time; and according to the smoke inlet wind speed Vy and the smoke inlet wind direction angle theta y, the magnetic field intensity B generated by the coil and the fan rotating speed Nfan are adjusted, so that the oil smoke is sucked and exhausted based on the set smoke gathering angle range. According to the lampblack treatment method, lampblack can be gathered into the lampblack gathering range, and the lampblack gathering efficiency under airflow disturbance is improved. The invention further relates to a computer readable storage medium, computer programs / instructions are stored on the computer readable storage medium, and the cooking fume treatment method is achieved when the computer programs / instructions are executed by the processor. The invention further relates to a range hood applying the oil smoke treatment method. The smoke gathering device is good in smoke gathering effect and high in smoke gathering efficiency.

Description

Technical Field

[0001] The present invention relates to an oil fume treatment method, a storage medium, and a range hood. Background Art

[0002] In the field of kitchen oil fume treatment, the existing technology usually adopts a single-mode working method and cannot be intelligently adjusted according to different working conditions. For example, during the cooking process, different operations such as frying, stir-frying, steaming, and boiling will generate different amounts of oil fume, but the existing equipment often cannot adjust the air volume and air speed in a timely manner according to the change of the oil fume volume, resulting in frequent oil fume escape problems. In addition, under the influence of different kitchen structures and whether the user's environment has windows open for ventilation adjustment, the existing equipment has obvious deficiencies in the control of air flow disturbance, and cannot accurately adjust the air flow direction and speed, resulting in low fume collection efficiency and affecting the kitchen air quality.

[0003] In addition, the cleaning work of the range hood is also a rather troublesome task. The existing technology mainly relies on manual observation and regular scrubbing. This method is not only inefficient but also difficult to detect and handle the oil accumulation inside the equipment in a timely manner. Some equipment uses high-pressure water washing technology for cleaning, but this method is likely to cause water vapor to enter the equipment, resulting in short circuits or structural damage to the circuit, seriously affecting the service life of the equipment.

[0004] In summary, there are many deficiencies in the existing technology in terms of oil fume treatment and equipment cleaning, and there is an urgent need for a solution that can intelligently adjust the working mode, accurately control air flow disturbance, and achieve efficient cleaning. Summary of the Invention

[0005] The first technical problem to be solved by the present invention is to provide an oil fume treatment method for the above-mentioned existing technology, which can gather oil fume within the fume collection range and improve the fume collection efficiency under air flow disturbance.

[0006] The second technical problem to be solved by the present invention is to provide an oil fume treatment method for the above-mentioned existing technology, which can achieve self-cleaning, is convenient and efficient in cleaning, and can avoid device damage.

[0007] The third technical problem to be solved by the present invention is to provide a computer-readable storage medium with a computer program / instructions stored thereon, and when the computer program / instructions are executed by a processor, the foregoing oil fume treatment method is implemented.

[0008] The fourth technical problem to be solved by the present invention is to provide a range hood applying the foregoing oil fume treatment method.

[0009] The technical solution adopted by the present invention to solve the above first technical problem is: an oil fume treatment method, characterized in that a coil is arranged outside the side close to the oil fume inlet;

[0010] When performing the oil fume extraction work, the coil is energized to generate a magnetic field;

[0011] The incoming smoke wind speed Vy and the incoming smoke wind direction angle θy at the oil fume inlet are detected and obtained in real time;

[0012] According to the incoming smoke wind speed Vy and the incoming smoke wind direction angle θy, the magnetic field strength B and the fan speed N generated by the coil are adjusted fan so that the oil fume is sucked and discharged based on the set smoke gathering angle range.

[0013] As an improvement, the magnetic field strength B and the fan speed N are dynamically matched based on the fuzzy PID algorithm fan of the real-time coupling relationship;

[0014] According to the incoming smoke wind speed Vy and the incoming smoke wind direction angle θy, after determining the magnetic field strength B required to be generated by the coil first, based on the real-time coupling relationship between the magnetic field strength B and the fan speed N fan the fan speed N is calculated fan .

[0015] As an improvement, the real-time coupling relationship between the magnetic field strength B and the fan speed N fan is:

[0016]

[0017] Among them, B(t) in Formula 1 represents the real-time data of the magnetic field strength B, and K i represents the integral coefficient, K p represents the proportionality coefficient, K d represents the differential coefficient; N fan (t) represents the real-time speed of the fan; e c (t) = C0 - C(t), where C0 is the target oil fume concentration value, and C(t) is the real-time oil fume concentration value at the detected oil fume inlet; e v (t) = V0 - V(t), where V0 is the target wind speed value of the incoming smoke wind speed, and V(t) is the real-time incoming smoke wind speed value at the detected oil fume inlet.

[0018] As an improvement, after obtaining the data of Vy and θy, according to the momentum conservation model of the oil fume airflow

[0019]

[0020] the Lorentz force F that needs to be applied by the magnetic field generated by the coil is calculated;

[0021] Among them, ρ in is the oil fume density in the oil fume suction channel, V in is the oil fume flow velocity in the oil fume suction channel, A in is the cross-sectional area of the oil fume suction channel, ρy is the oil fume density at the oil fume inlet, A y is the area of the oil fume inlet, F(t) is the Lorentz force that the magnetic field generated by the coil needs to apply, and Δt is the unit time;

[0022] Lorentz force formula

[0023] F = B·I eff ·L·sin(θ adjust ) (Formula 3)

[0024] θ adjust = θ y - θ0 (Formula 4)

[0025] In Formula 3, I eff represents the equivalent current of the ionized particles in the oil fume, I eff = m 2 C, where m is the calculation coefficient, C is the real-time oil fume concentration at the detected oil fume inlet, and L is the distance that the magnetic field acts on the oil fume in the front-back direction. In Formula 4, θ0 is the boundary value of the smoke-gathering angle range.

[0026] Calculate and obtain B according to Formula 2, Formula 3, and Formula 4; then calculate the corresponding fan speed N according to Formula 1 fan ;

[0027] Adjust the current applied to the coil according to the calculated magnetic field intensity B so that the coil generates a magnetic field with a magnetic field intensity of B, and adjust the fan speed for sucking oil fume according to the fan speed N fan

[0028] The technical solution adopted by the present invention to solve the above second technical problem is: during the process of sucking oil fume, the magnetic field generated by the coil acts on the oil stains remaining on the inner wall of the oil fume extractor casing, and the oil stains are accumulated based on the balance of electromagnetic force and gravity;

[0029] When the oil stains reach the set self-cleaning condition, control the coil to cut off the power, and the oil stains fall based on gravity to achieve the preliminary self-cleaning work.

[0030] In order to further improve the self-cleaning effect, after the preliminary self-cleaning work is completed, when it is detected that there are still oil stains remaining, control the current flowing into the coil to generate a reverse magnetic field, and the oil stains fall based on gravity and the Lorentz force generated by the magnetic field of the coil to achieve the secondary self-cleaning work.

[0031] In order to further improve the self-cleaning effect, after the secondary self-cleaning work is completed, when it is detected that there are still oil stains remaining, control the coil to pass a specific current so that the coil generates a harmonic magnetic field matching the inherent vibration frequency of the oil stains, thereby achieving the tertiary self-cleaning work.

[0032] ​The technical solution adopted by the present invention to solve the above-mentioned third technical problem is: a computer-readable storage medium, on which a computer program / instructions are stored, characterized in that: when the computer program / instructions are executed by a processor, the aforementioned oil fume treatment method is implemented.

[0033] The technical solution adopted by the present invention to solve the above-mentioned fourth technical problem is: an oil fume extractor, including a casing having an oil fume inlet, a controller, a memory, and a fan disposed in the casing, the controller being electrically connected to the memory and the fan, characterized in that: coils are respectively disposed on the left and right sides of the casing, and the coils are electrically connected to the controller;

[0034] The memory stores a computer program / instructions, and when the computer program / instructions are executed by a processor, the aforementioned oil fume treatment method is implemented.

[0035] In order to improve the self-cleaning effect of oil stains, an oil-repellent coating is provided on the inner wall of the casing.

[0036] Compared with the prior art, the advantages of the present invention are: in the oil fume treatment method of the present invention, by providing a coil capable of generating a magnetic field at the oil fume inlet, when performing the oil fume suction work, the magnetic field generated by the coil can act on the oil fume at the oil fume inlet, and by the electromagnetic force on the oil fume, the moving path of the oil fume is changed, so that the oil fume can be effectively gathered within the set smoke-gathering angle range, improving the suction effect on the oil fume and reducing the problem of oil fume escaping caused by external air flow disturbance.

[0037] In addition, using the magnetic field generated by the coil, it can also cooperate with the self-cleaning of the oil fume extractor, improving the convenience of cleaning the oil fume extractor, and no water is required during the self-cleaning process, avoiding damage to the internal components of the oil fume extractor.

[0038] The oil fume extractor applying the oil fume treatment method has a good smoke-gathering effect and a high smoke-gathering efficiency. And this oil fume extractor can achieve self-cleaning and has a high degree of intelligence. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a flowchart of the oil fume suction work in the oil fume treatment method of the embodiment of the present invention.

[0040] Figure 2 It is a flowchart of the self-cleaning work in the oil fume treatment method of the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] The present invention will be further described in detail below in conjunction with the embodiments of the drawings.

[0042] As Figure 1As shown, the oil fume treatment method in this embodiment includes an oil fume suction working method and a self-cleaning working method. To implement the oil fume treatment method in this embodiment, a coil needs to be set on the range hood. Specifically, the coil is set on the outer side close to the oil fume inlet. In order to ensure that the magnetic field generated by the coil can effectively cover the oil fume dissipation range near the oil fume inlet and act on the oil fume near the oil fume inlet as comprehensively as possible, at least two coils are set on the outer side of the oil fume inlet, and these coils need to be evenly set near the oil fume inlet. In this embodiment, two coils are set and are respectively set on the left and right sides of the oil fume inlet.

[0043] In this embodiment, the oil fume suction working method is specifically as follows.

[0044] When performing the oil fume suction work, the coil is energized to generate a magnetic field, which is used to gather the oil fume at the oil fume inlet, improve the gathering effect of the oil fume, enable it to smoothly enter the oil fume channel of the range hood, thereby improving the oil fume gathering efficiency, enhancing the oil fume suction effect, and reducing oil fume escape.

[0045] Specifically, the incoming smoke wind speed Vy and the incoming smoke wind direction angle θy at the oil fume inlet are detected and obtained in real time. The incoming smoke wind speed Vy and the incoming smoke wind direction angle θy can take the average value according to multiple collected data, or some existing algorithms can be used to obtain the characteristic data that can represent the oil fume characteristics. Then, according to the incoming smoke wind speed Vy and the incoming smoke wind direction angle θy, the magnetic field strength B and the fan speed N generated by the coil are adjusted fan , so that the oil fume is sucked and discharged based on the set smoke gathering angle range. The set smoke gathering angle range can be determined through multiple tests in the early-stage experiments during research and development. The set smoke gathering angle range can meet the requirement of sucking as much oil fume at the oil fume inlet as possible into the oil fume channel of the range hood and reducing oil fume escape as much as possible.

[0046] After obtaining the data of Vy and θy, according to the momentum conservation model of the oil fume airflow

[0047]

[0048] Calculate the Lorentz force F that needs to be applied by the magnetic field generated by the coil.

[0049] Where ρ in is the oil fume density in the oil fume suction channel, V in is the oil fume flow velocity in the oil fume suction channel, A in is the cross-sectional area of the oil fume suction channel, ρ y is the oil fume density at the oil fume inlet, A y is the area of the oil fume inlet, F(t) is the Lorentz force that needs to be applied by the magnetic field generated by the coil, and Δt is the unit time.

[0050] Lorentz force formula

[0051] F = B·I eff ·L·sin(θ adjust ) (Formula 3)

[0052] θ adjust = θ y - θ0 (Formula 4)

[0053] In Formula 3, I eff represents the equivalent current of the ionized particles in the oil fume. I eff = m 2 C, where m is a calculation coefficient, C is the real-time oil fume concentration at the oil fume inlet for detection, and L is the distance of the magnetic field acting on the oil fume in the front-back direction. In Formula 4, θ0 is the boundary value of the smoke gathering angle range.

[0054] Obtain B by calculating according to Formula 2, Formula 3, and Formula 4.

[0055] Based on the change in the magnetic field strength B generated by the coil, it generates a Lorentz force on the oil fume, causing the oil fume at the oil fume inlet to have a tendency to move and gather within the smoke gathering angle range. Correspondingly, the amount of oil fume gathered at the oil fume inlet will also change. Then, it is necessary to adjust the rotation speed of the fan in the range hood to match the change in the amount of oil fume caused by the change in the magnetic field strength, avoiding the problem of oil fume escape. In this embodiment, based on the fuzzy PID algorithm, the magnetic field strength B and the fan rotation speed N fan are dynamically matched in real-time coupling relationship.

[0056] The real-time coupling relationship between the magnetic field strength B and the fan rotation speed N fan is as follows:

[0057]

[0058] Among them, B(t) in Formula 1 represents the real-time data of the magnetic field strength B, K i represents the integral coefficient, K p represents the proportional coefficient, K d represents the differential coefficient; N fan (t) represents the real-time rotation speed of the fan; e c (t) = C0 - C(t), where C0 is the target oil fume concentration value, and C(t) is the real-time oil fume concentration value at the oil fume inlet for detection; e v (t) = V0 - V(t), where V0 is the target wind speed value of the incoming smoke, and V(t) is the real-time incoming smoke wind speed value at the oil fume inlet for detection.

[0059] In this way, according to the incoming smoke wind speed Vy and the incoming smoke wind direction angle θy, after first determining the magnetic field strength B that the coil needs to generate, based on the magnetic field strength B and the fan rotation speed N fanCalculating the fan speed N of the real-time coupling relationship fan , that is, calculating the corresponding fan speed N according to Formula 1 fan . The determined magnetic field strength B can ensure that the incoming smoke wind direction angle is adjusted within the smoke-gathering angle range. During specific adjustment, the current passing through the coil is adjusted according to the calculated magnetic field strength B, so that the coil generates a magnetic field with a magnetic field strength B. According to the fan speed N fan Adjust the fan speed for sucking oil fume.

[0060] The aforementioned oil fume treatment method can, by arranging a coil capable of generating a magnetic field at the oil fume inlet, utilize the magnetic field generated by the coil to act on the oil fume at the oil fume inlet during the oil fume suction operation, change the movement path of the oil fume through the electromagnetic force on the oil fume, so that the oil fume can be effectively gathered within the set smoke-gathering angle range, improve the suction effect of the oil fume, and also reduce the problem of oil fume escaping caused by external air flow disturbance.

[0061] As Figure 2 shown, in this embodiment, the self-cleaning method of the oil fume is as follows.

[0062] During the aforementioned oil fume suction operation, the oil fume that fails to be discharged in time and stays on the inner wall of the casing accumulates, and then a certain thickness of oil stain is formed. During the oil fume suction operation, the magnetic field generated by the coil acts on the oil stain remaining on the inner wall of the casing of the oil fume suction machine. Based on the balance of the electromagnetic force and gravity, it can stay on the inner wall of the casing, thereby avoiding the inadvertent dropping of the oil stain and polluting the stove top or causing adverse effects on cooking and users.

[0063] Based on the continuous accumulation of the oil stain, when the oil stain reaches a certain degree, it needs to be cleaned. In this embodiment, the self-cleaning of the oil stain on the inner wall of the casing is realized by controlling the energization of the coil. Specifically, when the oil stain reaches the set self-cleaning condition, the coil is controlled to be powered off, and the acting force of the magnetic field generated by the coil disappears, and the oil stain drops due to gravity to complete the preliminary self-cleaning work. The set self-cleaning condition can be specifically set as needed. For example, it can be determined based on the cumulative working duration of the oil fume suction machine, or by detecting the thickness of the oil stain on the inner wall of the casing. The specific condition data can be obtained based on the experimental tests in the R & D stage.

[0064] To further improve the self-cleaning effect, after the preliminary self-cleaning work is completed, there may still be a problem of oil stain residue on the casing. In this embodiment, the oil stain condition on the inner wall of the casing is detected. When it is detected that there is still oil stain residue on the inner wall of the casing, a set current is controlled to be passed into the coil, so that the acting force direction of the magnetic field on the oil stain is basically the same as the gravity direction of the oil stain, and the oil stain drops due to gravity and the Lorentz force generated by the magnetic field of the coil, realizing the secondary self-cleaning work and further improving the self-cleaning effect.

[0065] In order to further improve the self-cleaning effect, after the secondary self-cleaning operation is completed, the oil stain condition on the inner wall of the casing is continuously detected. When it is detected that there is still oil stain residue, a current that generates a reverse magnetic field is controlled to be introduced into the coil, so that the coil generates a harmonic magnetic field that matches the inherent vibration frequency of the oil stain. Such a harmonic magnetic field acts on the residual oil stain on the inner wall of the casing, causing Lorentz force oscillations to occur inside the oil stain, destroying the adhesion between the oil stain and the inner wall of the casing, and then enabling the oil stain to separate from the inner wall of the casing and fall off, thereby realizing the three - time self-cleaning operation. In this way, the self-cleaning operation is completed, and the self-cleaning effect can be well guaranteed.

[0066] The oil fume treatment method in this embodiment can also utilize the magnetic field generated by the coil to cooperate with the self-cleaning of the range hood, improving the convenience of cleaning the range hood, and no water is required during the self-cleaning process, avoiding damage to the internal components of the range hood.

[0067] The present invention also relates to a computer-readable storage medium, on which a computer program / instructions are stored. When the computer program / instructions are executed by a processor, the foregoing oil fume treatment method is implemented.

[0068] The present invention also relates to a range hood, including a casing having an oil fume inlet, a controller, a memory, and a fan disposed inside the casing. The controller is electrically connected to the memory and the fan. Coils are respectively disposed on the left and right sides of the casing, and the coils are electrically connected to the controller; a computer program / instructions are stored in the memory. When the computer program / instructions are executed by a processor, the foregoing oil fume treatment method is implemented.

[0069] The coils in this embodiment are symmetrically disposed with respect to the left and right of the oil fume passage inside the casing, and the magnetic fields generated by them are also symmetrically disposed left and right. The coils on both sides are adjusted such that the generated magnetic fields match the oil fume entering the corresponding side.

[0070] In order to improve the self-cleaning effect of the oil stain, an oil-repellent coating is provided on the inner wall of the casing. The oil-repellent coating can be made of various materials with good oil-repellent effects, such as fluorosilicon nanocomposite materials, whose surface energy < 20 mN / m and contact angle > 150°. In this way, when the magnetic field acts on the oil stain on the inner wall of the casing, the oil stain can better separate from the inner wall of the casing, improving the self-cleaning ability for the oil stain.

[0071] The range hood applying the foregoing oil fume treatment method has a good fume collection effect and a high fume collection efficiency. And this range hood can achieve self-cleaning and has a high degree of intelligence.

Claims

1. A fume treatment method, characterized in that: A coil is arranged on the outer side close to the oil fume inlet; When the oil fume extraction work is carried out, the coil is energized to generate a magnetic field; The inlet air velocity Vy and the inlet air direction angle θy of the oil fume inlet are obtained by real-time detection; Adjust the magnetic field strength B and the fan speed N generated by the coil according to the incoming smoke velocity Vy and the incoming smoke wind direction angle θy fan so that the oil fume is sucked and discharged based on the set smoke gathering angle range.

2. The oil fume treatment method according to claim 1, characterized in that: Dynamically matching the magnetic field intensity B and the fan speed N based on the fuzzy PID algorithm fan for the real-time coupling relationship; According to the incoming air velocity Vy and the incoming air wind direction angle θy, after first determining the magnetic field strength B that the coil needs to generate, based on the real-time coupling relationship between the magnetic field strength B and the fan speed N fan calculate the fan speed N fan .

3. The oil fume treatment method according to claim 2, wherein: Magnetic field intensity B and fan speed N fan The real-time coupling relationship is as follows: Among them, B(t) in Formula 1 represents the real-time data of the magnetic field intensity B, K i represents the integral coefficient, K p represents the proportionality coefficient, K d represents the differential coefficient; N fan (t) represents the real-time rotational speed of the fan; e c (t) = C0 - C(t), where C0 is the target concentration value of the oil fume, and C(t) is the real-time oil fume concentration value at the oil fume inlet; e v (t) = V0 - V(t), where V0 is the target wind speed value of the smoke inlet wind speed, and V(t) is the real-time smoke inlet wind speed value at the oil fume inlet.

4. The oil fume treatment method according to claim 3, characterized in that: After obtaining the data of Vy and θy, according to the momentum conservation model of the oil fume airflow Calculate the Lorentz force F that the magnetic field generated by the coil needs to apply; where ρ in is the oil fume density in the oil fume suction channel, V in is the oil fume flow velocity in the oil fume suction channel, A in is the cross-sectional area of the oil fume suction channel, ρ y is the oil fume density at the oil fume inlet, A y is the area of the oil fume inlet, F(t) is the Lorentz force that needs to be applied by the magnetic field generated by the coil, and Δt is the unit time; Lorentz force formula F = B·I eff ·L·sin(θ adjust ) (Formula 3) θ adjust = θ y - θ0 (Equation 4) In Formula 3, I eff represents the equivalent current of the ionized particles in the cooking fume, and I eff = m 2 C, where m is a calculation coefficient, C is the real-time cooking fume concentration at the cooking fume inlet under detection, and L is the distance of the magnetic field acting on the cooking fume in the front-back direction. In Formula 4, θ0 is the boundary value of the fume-gathering angle range. Calculate and obtain B according to Formula 2, Formula 3, and Formula 4; then calculate the corresponding fan speed N according to Formula 1 fan ; Adjust the current flowing through the coil according to the calculated magnetic field strength B so that the coil generates a magnetic field with a magnetic field strength B, and according to the fan speed N fan Adjust the fan speed of the fan used for sucking cooking fumes.

5. The oil fume treatment method according to any one of claims 1 to 4, characterized in that: During the oil fume extraction work process, the magnetic field generated by the coil acts on the oil stains remaining on the inner wall of the oil fume extractor casing, and the oil stains are accumulated based on the balance of electromagnetic force and gravity; When the oil stains reach the set self-cleaning condition, control the coil to cut off the power, and the oil stains fall due to gravity to achieve the preliminary self-cleaning work.

6. The oil fume treatment method according to claim 5, wherein: After the preliminary self-cleaning work is completed, when it is detected that there are still oil stains remaining, control to pass a current generating a reverse magnetic field into the coil, and the oil stains fall due to gravity and the Lorentz force generated by the magnetic field of the coil on them, to achieve the secondary self-cleaning work.

7. The oil fume treatment method according to claim 6, wherein: After the secondary self-cleaning work is completed, when it is detected that there are still oil stains remaining, control to pass a specific current into the coil, so that the coil generates a harmonic magnetic field matching the inherent vibration frequency of the oil stains, and then achieve the tertiary self-cleaning work.

8. A computer-readable storage medium having computer programs / instructions stored thereon, characterized in that: When the computer program / instructions are executed by the processor, the oil fume treatment method described in any one of claims 1 to 7 is implemented.

9. An oil fume suction machine, comprising a casing having an oil fume inlet, a controller, a memory, and a fan disposed in the casing, the controller being electrically connected to the memory and the fan, and characterized in that: Coils are respectively arranged on the left and right sides of the casing, and the coils are electrically connected to the controller; A computer program / instructions is stored in the memory, and when the computer program / instructions are executed by the processor, the oil fume treatment method described in any one of claims 1 to 7 is implemented.

10. The range hood according to claim 9, wherein: An oil-repellent coating is provided on the inner wall of the casing.

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