Range hood and display method of oil fume information

Abstract

This invention relates to the field of home appliance technology, and discloses a range hood and a method for displaying fume information. The range hood includes: a housing; a plasma discharge module adapted to generate plasma through discharge, so that particulate matter in the fume flowing through the plasma purification zone is charged and collected by the electric field; a back corona catalytic module adapted to generate back corona discharge in the back corona treatment zone, so that gaseous pollutants in the fume repeatedly oscillate in the back corona treatment zone and are adsorbed and / or decomposed; and a pollutant interception component disposed between the back corona treatment zone and the air outlet, and having a plurality of micropores, adapted to intercept small particulate matter in the fume. This invention, through the configured back corona module, can effectively remove gaseous pollutants from the fume, and through the pollutant interception component with micropores, can further intercept residual particulate pollutants, effectively preventing the escape of residual particulate pollutants and further improving the fume purification efficiency.

Description

Technical Field

[0001] This invention relates to the field of home appliance technology, specifically to a range hood and a method for displaying cooking fume information. Background Technology

[0002] Cooking fumes include solid particulate matter, liquid oil droplets, and volatile organic compounds such as alkanes, alcohols, aldehydes, ketones, heterocyclic amines, and polycyclic aromatic hydrocarbons. They are not only highly viscous and have strong adhesion, making them difficult to remove, but the toxicity, persistence, and recalcitrant nature of pollutants such as VOCs and PM in cooking fumes will seriously endanger human health and the environment.

[0003] Plasma, as a high-energy, electrically neutral substance containing active groups, can charge oil fumes. Therefore, existing technologies use electrostatic purification structures to treat oil fumes and electrostatically adsorb particulate matter in the fumes. However, electrostatic deposition cannot remove gaseous pollutants such as VOCs. Moreover, some smaller particles may escape due to their low charge, making them difficult to collect and still causing environmental pollution. Summary of the Invention

[0004] In view of this, the present invention provides a range hood and a method for displaying oil fume information to solve the problem that existing methods of purifying oil fumes cannot remove gaseous pollutants from the oil fumes and that residual particulate pollutants are prone to escape, resulting in low oil fume purification efficiency.

[0005] In a first aspect, the present invention provides a range hood, comprising:

[0006] The housing has an air inlet, an air outlet, and an oil fume treatment channel connecting the air inlet and the air outlet. A plasma purification zone and an anti-corona treatment zone are sequentially arranged in the oil fume treatment channel along the airflow direction.

[0007] The plasma discharge module is located in the plasma purification zone and is suitable for generating plasma through discharge, so that the particulate matter in the oil fume flowing through the plasma purification zone is charged and collected by the electric field.

[0008] The anti-corona catalytic module is located in the anti-corona treatment zone and is suitable for generating anti-corona discharge in the anti-corona treatment zone so that the gaseous pollutants in the oil fume can be repeatedly oscillated in the anti-corona treatment zone and adsorbed and / or decomposed.

[0009] The pollutant interception component is located between the anti-corona treatment zone and the air outlet. The pollutant interception component has several micropores, which are suitable for intercepting small particulate matter in the oil fume.

[0010] Beneficial effects: When the range hood is started, the fumes flow from the air inlet through the plasma purification zone and the anti-corona treatment zone of the fume treatment channel. Because the plasma discharge module generates a large amount of plasma in the plasma purification zone, and this plasma is polarized, the fumes can be charged onto dust and other particles as they flow through the plasma purification zone. These charged particles, upon entering the deflection electric field, are deflected by the electric field force and concentrated on the dust collection plate, thus achieving particle collection. After purification in the plasma purification zone, most of the particles in the fumes are electrostatically adsorbed and then continue to pass through the anti-corona treatment zone. The anti-corona catalytic module in the anti-corona treatment zone generates anti-corona discharge, forming a high-density anti-corona discharge in the anti-corona treatment zone. The corona plasma radiation space creates a reverse electric field that causes the particulate matter in the oil fume to oscillate repeatedly, further eliminating residual particulate matter. As an enhanced treatment, this further improves the collection effect of particulate matter in the oil fume. In addition, the active substances excited by the formed reverse corona field, in conjunction with the catalyst, can effectively remove gaseous pollutants and odors from the oil fume. Furthermore, by using a pollutant interception component set between the reverse corona treatment zone and the air outlet, the micropores on the pollutant interception component can further intercept residual particulate pollutants, effectively preventing the escape of residual particulate pollutants and further improving the oil fume purification efficiency. This effectively solves the problem that existing oil fume purification methods cannot remove gaseous pollutants from oil fumes and that residual particulate pollutants are prone to escape, resulting in low oil fume purification efficiency.

[0011] In one alternative implementation, the anti-corona catalytic module includes:

[0012] High-voltage electrode;

[0013] The ground electrode is spaced apart from the high-voltage electrode.

[0014] An insulating dielectric structure is placed on the side of the ground electrode close to the high-voltage electrode. The insulating dielectric structure is suitable for accumulating charge when the high-voltage electrode and the ground electrode discharge, forming a reverse electric field and causing reverse corona discharge.

[0015] Beneficial effects: By setting an insulating dielectric structure between the ground electrode and the high-voltage electrode, when the plasma generated between the high-voltage electrode and the ground electrode moves between the two, the insulating dielectric structure can rely on its own large surface resistance to enrich polar particles and form a reverse electric field, so that the charged particulate pollutants can oscillate repeatedly, enhance the purification effect on particulate pollutants, and further eliminate the residual particulate matter that was not removed in the previous functional area.

[0016] In one alternative embodiment, the insulating dielectric structure is a honeycomb structure supported on activated carbon and / or a catalyst.

[0017] Beneficial effects: By setting activated carbon and / or catalysts on the insulating dielectric structure, the insulating dielectric structure can not only enrich polar particles, but also adsorb or oxidize and decompose VOCs gaseous pollutants in the air and by-products such as ozone and nitrogen oxides generated by discharge.

[0018] In one alternative implementation, the ground electrode is a mesh structure made of metallic material, with the outer periphery of the mesh ground electrode matching the inner periphery of the back corona treatment area.

[0019] Beneficial effects: In the above embodiments, the ground electrode adopts a mesh structure, which makes the charge distribution more uniform, thereby making it easier to control the back corona discharge in a stable state.

[0020] In one alternative implementation, the high-voltage electrode includes a plurality of spaced-apart metal discharge tips.

[0021] In one optional embodiment, the fume treatment duct further includes:

[0022] The deflection settling zone is located downstream of the back corona treatment zone and is situated on the side of the back corona treatment zone.

[0023] The pollutant interception component is located between the deflection and settling zone and the back corona treatment zone, and the air outlet is connected to the deflection and settling zone;

[0024] After being treated in the anti-corona treatment zone, the tiny particles in the fumes are intercepted by the pollutant interception component, deflected through micropores into the deflection and settling zone, and discharged from the air outlet after settling on their own.

[0025] Beneficial effects: By setting a deflection settling zone on the side of the anti-corona treatment zone, the air treated by the anti-corona module and pollutant interception components must pass through the deflection settling zone before being discharged from the air outlet. The deflection settling zone causes the air to turn before being discharged. Compared with the straight-in and straight-out method, it can further increase the airflow path, which is more conducive to the settling and stratification of pollutants in the air, improves the purification effect, and also makes the exhaust air more gentle.

[0026] In one alternative implementation, the air outlet is located in the lower middle part of the side wall of the housing.

[0027] Beneficial effects: The air outlet is located in the lower middle part of the casing side wall, and the pollutant interception component is detachably installed inside the casing. By placing the air outlet in the lower middle part of the casing side wall, the air needs to sink to a certain height before being discharged, which is more conducive to the settling and stratification of pollutants in the air, further improving the air purification effect.

[0028] In one alternative implementation, the contaminant interception component is detachably disposed within the housing.

[0029] Beneficial effects: The pollutant interception component mainly handles gaseous pollutants, with very few oil fume particles. Even if these particles accumulate over time, the design allows for easy disassembly of the pollutant interception component by detachably installing it inside the housing. This enables the pollutant interception component to be disassembled, cleaned, and reused.

[0030] In one alternative embodiment, a fan is installed within the deflection settling zone. The fan drives the air entering through the air inlet to flow through the plasma purification zone, the back corona treatment zone, and the deflection settling zone before exiting through the air outlet.

[0031] In one alternative embodiment, the air inlet is located in the middle of the bottom wall of the housing, and a partition plate is provided inside the housing;

[0032] One end of the partition plate is fixed to the bottom wall of the housing, and the other end is set at a predetermined distance from the top wall of the housing. The pollutant interception component includes an interception plate disposed between the other end of the partition plate and the top wall of the housing.

[0033] Both the partition plate and the interceptor plate are cylindrical. The inner circumference of the partition plate forms a plasma purification zone, the inner circumference of the interceptor plate forms a back corona treatment zone, and the outer circumference of the partition plate and the interceptor plate forms a deflection and settling zone between the inner wall of the shell.

[0034] In one optional embodiment, air outlets on opposite side walls of the housing are adapted to communicate with the deflection settling zone. The range hood also includes two sets of fans arranged in the deflection settling zone, with the two sets of fans corresponding to the two air outlets, adapted to drive the fumes from the air inlet into the fume treatment channel and out from the air outlet.

[0035] Beneficial effects: By setting two sets of air outlets on the opposite side walls of the casing and two sets of fans accordingly, the suction effect of oil fumes can be further improved, and the emission efficiency of oil fumes can be increased.

[0036] In one alternative embodiment, the range hood further includes an oil-blocking mesh disposed at the air inlet, the oil-blocking mesh being adapted to intercept large particles and / or oil droplets in the fumes.

[0037] Beneficial effects: By installing an oil-blocking net at the air inlet, large oil droplets or particles in the fumes can be physically intercepted. Optionally, the oil-blocking net can be a metal oil-blocking net or a dynamic oil-blocking net to effectively intercept large-diameter oil droplets and further improve the purification effect of the fumes.

[0038] In one alternative embodiment, the range hood further includes:

[0039] An oil fume sensing and display device is mounted on a housing. The oil fume sensing and display device includes a detection component and a display component.

[0040] The detection component and the display component are both connected to the range hood's controller. The detection component is used to detect oil fume information in the indoor air, and the display component is suitable for displaying oil fume information, including PM value and VOCs value.

[0041] Beneficial effects: The installed fume sensor display device can display the real-time pollutant content in the room, allowing users to know the indoor fume situation and also reflecting the fume treatment effect of the range hood, making it easier for users to control the operation of the range hood and improving the user experience.

[0042] Secondly, the present invention also provides a method for displaying oil fume information, applicable to the above-mentioned range hood, the display method comprising:

[0043] Obtain the actual PM and VOC values ​​in indoor air;

[0044] The actual PM value is reduced proportionally according to a preset variable-proportion adjustment formula to obtain the displayed PM value, thereby narrowing the display range of the PM value.

[0045] A display curve is generated based on the displayed PM value and the actual VOCs value, and then displayed on the display component of the range hood.

[0046] Beneficial effects: Through practical experiments in scenarios such as stir-frying (pouring oil and stirring), boiling soup (normal state and boiling state), and boiling water, combined with a digital display database of oil fume sensors, a variable-proportion algorithm for oil fume information is provided. According to a preset variable-proportion adjustment formula, the actual PM value is reduced proportionally to obtain the displayed PM value. This reduces the range of values ​​displayed, allowing users to quickly see the trend of changes in the readings. It achieves dynamic feedback and rapid response of the smoke, improving the user experience. It effectively solves the problem that the display range of PM and actual VOCs values ​​on the digital display devices of existing range hoods is too large, and the changes in PM and VOCs values ​​cannot be intuitively and quickly seen during the operation of the range hood, leading to some misunderstandings and affecting the user experience.

[0047] In one optional implementation, a display curve is generated based on the displayed PM value and the actual VOCs value, and then displayed on a display component, specifically including:

[0048] A first display curve is generated based on the displayed PM value, and a second display curve is generated based on the actual VOCs value.

[0049] The first and second display curves are displayed on the display component, respectively.

[0050] Beneficial effects: By reducing the PM value display range from 35,000 to less than 1,000, it meets the display range of 0 to 999. After scaling down, the display range of PM value is reduced to 1 / 35 of the original, so that the change trend of VOCs can be seen more clearly and intuitively, improving the user experience.

[0051] In one optional implementation, a display curve is generated based on the displayed PM value and the actual VOCs value, and then displayed on a display component, specifically including:

[0052] The actual PM value is corrected using the first correction factor to obtain the corrected PM value;

[0053] The actual VOCs value is corrected using the second correction factor to obtain the corrected VOCs value;

[0054] The PM correction value and the VOCs correction value are added together to obtain the flue gas value. A third display curve is generated based on the flue gas value and displayed on the display component of the range hood.

[0055] Beneficial effects: Because the data displayed by the fume sensor is PM and VOCs, these two data cannot be directly used to represent the actual smoke value. Using PM alone, although the reading decreases, the smell of cooking can still be smelled. Using VOCs alone, the reading change is not obvious, and the value is still high even if there is no odor. By combining the actual user experience, the two data are corrected and the relationship between smoke value and PM and VOCs is fitted using a database to obtain a third display curve. The third display curve is displayed on the display component. By displaying the corrected smoke value digitally, dynamic feedback and rapid response of smoke can be achieved in different cooking scenarios, improving the user experience.

[0056] In one optional implementation, a first correction coefficient is set as k1 and a second correction coefficient is set as k2, where k1 > k2 and k1 + k2 = 1.

[0057] In one optional implementation, the variable proportional adjustment formula is P 显示 =P 实际 / (1+P 实际 / n), where P 实际 P represents the actual PM value. 显示 To display PM values, 1000 < n < 1100.

[0058] Beneficial effects: P 实际 P represents the actual PM reading fed back by the fume sensor. 显示The PM value should be displayed on the range hood's display component after the variable ratio adjustment. Since the PM value varies widely from 0 to 35,000, only the PM value is adjusted proportionally to control the display range within 0 to 999. This allows all PM and VOC values ​​to be controlled within the display range, enabling users to quickly see the changing trend of VOCs, even when the changes are not obvious. Attached Figure Description

[0059] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0060] Figure 1 This is a schematic diagram of the structure of the range hood in an embodiment of the present invention;

[0061] Figure 2 This is a longitudinal cross-sectional view of the anti-corona catalytic module in an embodiment of the present invention;

[0062] Figure 3 This is a top view of the high-voltage electrode of the anti-corona catalytic module in an embodiment of the present invention;

[0063] Figure 4 This is a flowchart illustrating a first embodiment of the method for displaying oil fume information in this invention.

[0064] Figure 5 This is a flowchart illustrating a second embodiment of the method for displaying oil fume information in this invention.

[0065] Figure 6 This is a flowchart illustrating a third embodiment of the method for displaying oil fume information in this invention.

[0066] Figure 7 This is a digital simulation graph of PM concentration and VOCs index before the improvement in the related technology of this invention;

[0067] Figure 8 This is a digital simulation graph of PM concentration and VOCs index (first display curve and second display curve) after varying the scale in an embodiment of the present invention.

[0068] Figure 9 This is a digital simulation comparison chart of flue gas values ​​after correction of PM and VOCs indices in an embodiment of the present invention;

[0069] Explanation of reference numerals in the attached figures:

[0070] 10. Housing; 101. Air inlet; 102. Air outlet; 20. Plasma purification zone; 30. Anti-corona treatment zone; 31. Anti-corona catalytic module; 311. High-voltage electrode; 3111. Metal discharge tip; 312. Ground electrode; 313. Insulating medium structure; 40. Pollutant interception component; 50. Deflection and settling zone; 60. Fan; 70. Separator; 80. Physical interception zone. Detailed Implementation

[0071] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, 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.

[0072] In the description of this invention, it should be noted that the terms "upper," "lower," "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," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0073] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0074] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0075] Cooking fumes include solid particulate matter, liquid oil droplets, and volatile organic compounds such as alkanes, alcohols, aldehydes, ketones, heterocyclic amines, and polycyclic aromatic hydrocarbons. These fumes are not only highly viscous and have strong adhesion, making them difficult to remove, but the toxicity, persistence, and recalcitrant nature of pollutants such as VOCs (volatile organic compounds) and PM (particulate matter) in cooking fumes will seriously endanger human health and the environment.

[0076] Plasma, as a high-energy, electrically neutral substance containing active groups, can charge cooking fumes. Therefore, existing technologies use electrostatic purification structures to electrostatically adsorb particulate matter in cooking fumes. However, electrostatic deposition cannot remove gaseous pollutants such as VOCs. Furthermore, smaller particles, due to their lower charge, easily escape and cannot be effectively collected, still causing environmental pollution. In addition, existing range hoods with digital displays typically show PM and VOC values. PM, mainly composed of particulate matter from combustion and high-temperature oil, fluctuates greatly. Range hoods primarily remove PM, resulting in rapid PM display, fast purification response, and significant removal effect. However, PM also consists of evaporated water vapor, and the ambient PM level can affect the range hood's fume removal efficiency. VOCs, mainly volatile organic compounds produced by particulate matter volatilization and food thermal oxidation, remain in the air for a relatively long time after generation, and their concentration does not change significantly, resulting in consistently high displayed values ​​and impacting the user experience. Since PM values ​​are much higher than VOCs values, and the display range of PM values ​​is generally between 30,000 and 40,000, the display range is quite large. Meanwhile, VOCs changes are not obvious, so users cannot quickly and intuitively see the trend of changes in the display values, resulting in a poor user experience.

[0077] The following is combined with Figures 1 to 9 The following describes embodiments of the present invention.

[0078] According to an embodiment of the present invention, in one aspect, the present invention provides a range hood, which includes a housing 10, a plasma discharge module, an anti-corona catalytic module 31, and a pollutant interception component 40.

[0079] Specifically, such as Figures 1 to 3 As shown, the housing 10 has an air inlet 101, an air outlet 102, and an oil fume treatment channel connecting the air inlet 101 and the air outlet 102. A plasma purification zone 20 and a back corona treatment zone 30 are sequentially arranged within the oil fume treatment channel along the airflow direction. A plasma discharge module is disposed in the plasma purification zone 20 and is adapted to generate plasma through discharge, so that particulate matter in the oil fume flowing through the plasma purification zone 20 is charged and collected by the electric field. A back corona catalytic module 31 is disposed in the back corona treatment zone 30 and is adapted to generate back corona discharge in the back corona treatment zone 30, so that gaseous pollutants in the oil fume repeatedly oscillate in the back corona treatment zone 30 and are adsorbed and / or decomposed. A pollutant interception component 40 is disposed between the back corona treatment zone 30 and the air outlet 102. The pollutant interception component 40 has several micropores, suitable for intercepting small particulate matter in the oil fume.

[0080] In the above embodiment, when the range hood is started, the fumes flow from the air inlet 101 through the plasma purification zone 20 and the anti-corona treatment zone 30 of the fume treatment channel. Because the plasma discharge module generates a large amount of plasma in the plasma purification zone 20, and this plasma is polarized, the plasma generated by the plasma discharge module can charge dust and other particles as the fumes flow through the plasma purification zone 20, making them charged. After entering the deflection electric field, the charged particles are deflected by the electric field force and concentrated on the dust collection plate, thus achieving particle collection. After being purified by the plasma purification zone 20, most of the particles in the fumes are electrostatically adsorbed and then continue to pass through the anti-corona treatment zone 30. The anti-corona catalytic module 31 in the anti-corona treatment zone 30 generates anti-corona discharge, which can... A high-density anti-corona plasma radiation space is formed, and the resulting anti-electric field causes the particulate matter in the oil fume to oscillate repeatedly, further eliminating residual particulate matter. As an enhanced treatment, this further improves the collection effect of particulate matter in the oil fume. In addition, the active substances excited by the formed anti-corona field, in conjunction with the catalyst, can effectively remove gaseous pollutants and odors from the oil fume. Furthermore, the pollutant interception component 40 set between the anti-corona treatment zone 30 and the air outlet 102, with its micropores, can further intercept residual particulate pollutants, effectively preventing the escape of residual particulate pollutants and further improving the oil fume purification efficiency. This effectively solves the problem that existing oil fume purification methods cannot remove gaseous pollutants from oil fumes and that residual particulate pollutants are prone to escape, resulting in low oil fume purification efficiency.

[0081] In some embodiments, the plasma purification zone 20 includes a high-voltage plasma generation zone and a deflection dust collection zone. Small-diameter oil droplets or dust particles in the air are charged in the plasma generation zone, and flue gas is collected in the deflection dust collection zone using an electric field. The high-voltage plasma generation zone uses a metal tip or tungsten filament with a small radius of curvature to achieve air breakdown, decomposing neutral air into positively and negatively polar particles, i.e., plasma. These plasma particles, due to their polarity, can charge dust particles. After entering the deflection dust collection zone, the charged particles are deflected by an electric field and move to the dust collection plate in the deflection dust collection zone, thus achieving particle collection. The discharge form of the plasma treatment zone can be selected as column-cylinder type, column-honeycomb grounding type, or needle-plate type. By charging small-diameter oil droplets or dust particles in the air, flue gas is collected in the deflection zone using an electric field.

[0082] Furthermore, the plasma discharge module includes a high-voltage discharge electrode disposed in the high-voltage plasma generation zone and a dust collection plate disposed in the deflection dust collection zone. The high-voltage discharge electrode utilizes the principle of tip discharge; during discharge, the tip breaks down the air, generating a large amount of plasma to prepare for subsequent particle charging. The dust collection plate includes multiple plates spaced apart, arranged perpendicular to the airflow direction, with the plate surface extending parallel to the airflow direction. Air containing pollutants flows into the vicinity of the high-voltage plasma generation zone from the air inlet 101. In the vicinity of the high-voltage plasma generation zone, particulate matter is adsorbed and ionized by the high-voltage tip, generating free charges. After the particulate pollutants are adsorbed and charged, they enter the deflection dust collection zone. Since the direction of the electric field is perpendicular to the airflow direction, the charged pollutant particles in this area will collide with the dust collection plate due to the deflection of the electric field and accumulate on the surface of the dust collection plate. Then, the air purified by the plasma purification zone 20 continues to rise and enters the back corona treatment zone 30. After enhanced treatment, it is then intercepted and filtered by the pollutant interception component 40 before being discharged from the air outlet 102.

[0083] In one embodiment, such as Figure 2 As shown, the anti-corona catalytic module 31 includes a high-voltage electrode 311, a ground electrode 312, and an insulating dielectric structure 313. The ground electrode 312 and the high-voltage electrode 311 are spaced apart. The insulating dielectric structure 313 is disposed on the side of the ground electrode 312 close to the high-voltage electrode 311. The insulating dielectric structure 313 is adapted to accumulate charge when the high-voltage electrode 311 and the ground electrode 312 discharge, forming an anti-electric field and generating anti-corona discharge.

[0084] In the above embodiments, by providing an insulating dielectric structure 313 between the ground electrode 312 and the high voltage electrode 311, when the plasma generated between the high voltage electrode 311 and the ground electrode 312 moves between them, the insulating dielectric structure 313 can enrich polar particles by relying on its own large surface resistance, forming a reverse electric field, so that the charged particulate pollutants can oscillate repeatedly, enhancing the purification effect on particulate pollutants and further eliminating the residual particulate matter that was not removed in the previous functional area.

[0085] In one embodiment, the insulating dielectric structure 313 is a honeycomb structure supported with activated carbon and / or a catalyst. By providing activated carbon and / or a catalyst on the insulating dielectric structure 313, the insulating dielectric structure 313 can not only enrich polar particles, but also adsorb or oxidize and decompose gaseous VOCs pollutants in the air and byproducts such as ozone and nitrogen oxides generated by discharge.

[0086] Optionally, the catalyst can be prepared on the honeycomb material by impregnation or coating, as can be seen in mosquito coils. Different types of catalysts can be selected according to the type of gas to be treated. The catalyst can undergo chemical changes with the gas under corona conditions to remove gaseous pollutants such as VOCs and byproducts such as ozone and nitrogen oxides.

[0087] Of course, in other alternative embodiments, the insulating medium structure 313 includes an insulating medium plate and an activated carbon adsorption layer and / or a catalyst layer coated on the insulating medium plate.

[0088] In this embodiment, the anti-corona treatment zone 30 can generate more active groups, which mainly have three functions: first, it can generate a high-density anti-corona plasma radiation space, serving as an enhanced treatment zone to further eliminate residual particulate matter not removed in the previous functional zones; second, it treats gaseous pollutants by converting organic pollutant gases such as VOCs into water and carbon dioxide through the chemical bond breaking and recombination brought about by the active groups; and third, it treats and adsorbs the byproducts of the corona reaction through the catalyst or activated carbon loaded on the insulating dielectric structure 313. At the same time, the active substances excited by the anti-corona discharge, combined with the catalyst, can also effectively treat gaseous pollutants and odors.

[0089] Optionally, the insulating dielectric structure 313 is made of insulating honeycomb material, such as porous ceramic, high-temperature resistant ceramic or organosilicon material.

[0090] In this embodiment, the insulating dielectric structure 313 uses an insulating honeycomb material as a carrier, which facilitates catalyst coating. The surface resistivity of the insulating dielectric structure 313 is 10³Ω to 10⁸Ω.

[0091] In one embodiment, the ground electrode 312 is a mesh structure made of metallic material, and the outer periphery of the mesh ground electrode 312 matches the inner periphery of the back corona treatment region 30. In this embodiment, the ground electrode 312 adopts a mesh structure, which makes the charge distribution more uniform, thereby making it easier to control the back corona discharge in a stable state.

[0092] Preferably, the ground electrode 312 is a grounding grid made of stainless steel with an aperture of 0.5 mm.

[0093] In one embodiment, the high-voltage electrode 311 includes a plurality of spaced-apart metal discharge tips 3111. Optionally, the high-voltage electrode 311 may be a needle or other shaped tip with a radius of curvature of 1 mm, and may be made of stainless steel or a high-temperature alloy.

[0094] Preferably, such as Figure 3As shown, in this embodiment, the metal discharge tip 3111 is arranged in multiple rings from the inside out, and each ring is evenly spaced with multiple metal discharge tips 3111. The metal discharge tips 3111 in adjacent rings are staggered, which improves the uniformity and stability of the discharge.

[0095] In this embodiment, the high-voltage electrode 311, the insulating dielectric structure 313, and the ground electrode 312 are arranged sequentially in the anti-corona treatment zone 30 along the gas flow direction.

[0096] In this embodiment, the anti-corona treatment zone 30 can effectively prevent the escape of residual particulate matter. In addition, this treatment zone can also be used to treat odors. Odor molecules undergo chemical bond breaking and recombination brought about by active groups (such as high-energy electrons, high-energy photons, oxygen active groups, etc.), converting organic pollutant gases into water and carbon dioxide. Combined with a catalyst, it can also improve the removal rate of by-products (ozone, nitrogen oxides).

[0097] In one embodiment, the fume treatment channel further includes a deflection settling zone 50, which is located downstream of the back corona treatment zone 30 and on the side of the back corona treatment zone 30; a pollutant interception component 40 is disposed between the deflection settling zone 50 and the back corona treatment zone 30, and the air outlet 102 is connected to the deflection settling zone 50; after being treated by the back corona treatment zone 30, the tiny particles in the fume are intercepted by the pollutant interception component 40, deflected through micropores into the deflection settling zone 50, and discharged from the air outlet 102 after settling.

[0098] In the above embodiment, by setting a deflection settling zone 50 on the side of the anti-corona treatment zone 30, the air treated by the anti-corona module and the pollutant interception component 40 needs to pass through the deflection settling zone 50 before being discharged from the air outlet 102. The deflection settling zone 50 makes the air turn before being discharged. Compared with the straight-in and straight-out method, it can further increase the airflow path, which is more conducive to the settling and stratification of pollutants in the air, improves the purification effect, and also makes the exhaust air more gentle.

[0099] In one optional embodiment, the air outlet 102 is located in the lower middle part of the side wall of the housing 10, and the pollutant interception component 40 is detachably disposed within the housing 10. By positioning the air outlet 102 in the lower middle part of the side wall of the housing 10, air is forced to descend to a certain height before being discharged, which is more conducive to the settling and stratification of pollutants in the air, further improving the air purification effect. Furthermore, the pollutants intercepted by the pollutant interception component 40 are mainly gaseous pollutants, with very few oil fume particles. Even if they accumulate over a long period, the detachable installation of the pollutant interception component 40 within the housing 10 facilitates its disassembly, allowing it to be disassembled, cleaned, and reused.

[0100] Preferably, the upper edge of the air outlet 102 is lower than the lower edge of the pollutant interception component 40, so that the air outlet 102 and the pollutant interception component 40 are staggered, which is conducive to the downward sinking of the air. More preferably, the air outlet 102 is located on the side wall of the housing 10 near the bottom wall, so that the position of the air outlet 102 is lower, which is more conducive to the sinking of the air.

[0101] In some preferred embodiments, pressure oil fume sensors can be installed at the air inlet and outlet. When the pressure difference exceeds the preset normal operating value, the range hood will issue a reminder to the user to clean or replace the pollutant interception component 40, thus increasing the level of intelligence.

[0102] In one embodiment, a fan 60 is provided in the deflection settling zone 50. The fan 60 can drive the air entering from the air inlet 101 to flow through the plasma purification zone 20, the back corona treatment zone 30 and the deflection settling zone 50, and then discharge it from the air outlet 102.

[0103] Preferably, in this embodiment, the dust collection plate and the insulating medium structure 313 are detachably disposed within the housing 10.

[0104] In one embodiment, the air inlet 101 is located in the middle of the bottom wall of the housing 10, and a partition plate 70 is provided inside the housing 10. One end of the partition plate 70 is fixed to the bottom wall of the housing 10, and the other end is disposed at a predetermined distance from the top wall of the housing 10. The pollutant interception component 40 includes an interception plate disposed between the other end of the partition plate 70 and the top wall of the housing 10. Both the partition plate 70 and the interception plate are cylindrical. The inner periphery of the partition plate 70 forms a plasma purification zone 20, the inner periphery of the interception plate forms a back corona treatment zone 30, and the outer periphery of the partition plate 70 and the interception plate forms a deflection settling zone 50 between the inner wall of the housing 10 and the outer periphery of the partition plate 70 and the interception plate.

[0105] In the above embodiment, by setting the cylindrical partition plate 70 and the intercepting plate, a cylindrical plasma purification zone 20 and a back corona treatment zone 30 can be formed in the middle of the housing 10, and an annular deflection and settling zone 50 can be formed between the outer periphery of the plasma purification zone 20 and the back corona treatment zone 30 and the housing 10, so that the range hood can be made to draw in air from the bottom and exhaust air from all sides.

[0106] Furthermore, in this embodiment, the interceptor plate is provided with several micro-holes. Under the action of the fan 60, air can be ensured to rotate through the micro-holes on the interceptor plate and enter the deflection and settling zone 50 on the side. After settling, it is discharged from the air outlet 102. The partition plate 70 is a solid plate structure, which serves as a structural component to divide the functional processing area. This part cannot be allowed to pass through, thereby ensuring continuous plasma processing.

[0107] In other alternative embodiments, the partition plate 70 and the interceptor plate may not be cylindrical, but rather flat plate structures, with the plate-shaped partition plate 70 and the interceptor plate together enclosing the plasma zone and the anti-corona treatment zone 30 with the side wall of the housing 10.

[0108] In one embodiment, the housing 10 has air outlets 102 on its opposite sidewalls, each adapted to communicate with the deflection and settling zone 50. The range hood also includes two sets of fans 60 disposed within the deflection and settling zone 50. The two sets of fans 60 are correspondingly arranged with the two air outlets 102, adapted to drive the fumes from the air inlet 101 into the fume treatment channel and out of the air outlets 102. By providing two sets of air outlets 102 on the opposite sidewalls of the housing 10 and correspondingly providing two sets of fans 60, the fume extraction effect can be further improved, and the fume emission efficiency can be increased.

[0109] In one embodiment, the range hood also includes an oil-blocking mesh disposed at the air inlet 101, the oil-blocking mesh being adapted to intercept large particles and / or oil droplets in the fumes.

[0110] In the above embodiments, the oil-blocking net installed at the air inlet 101 can physically intercept large oil droplets or particles in the fumes. Optionally, the oil-blocking net can be a metal oil-blocking net or a dynamic oil-blocking net to effectively intercept large-diameter oil droplets and further improve the purification effect of the fumes.

[0111] Optionally, a physical interception zone 80 is formed inside the housing 10, and the oil barrier is detachably installed on the housing 10 for easy disassembly and cleaning.

[0112] The anti-corona catalytic module 31, pollutant interception component 40, and deflection settling zone 50 added to the range hood provided in this embodiment can effectively improve the oil fume purification efficiency of the range hood. Through the designed multi-stage discharge treatment zone, it can complete the treatment of large oil droplets, small oil droplets, flue gas particles, and VOCs. Furthermore, the electro-purification collection end, such as the pollutant interception component 40, dust collection plate, and insulating dielectric structure 313, can be disassembled and cleaned, extending the service life of the product.

[0113] In one embodiment, the range hood further includes an oil fume sensing and display device disposed on the housing 10. The oil fume sensing and display device includes a detection component and a display component. Both the detection component and the display component are connected to the controller of the range hood. The detection component is used to detect oil fume information in the indoor air, and the display component is adapted to display the oil fume information, including PM value and VOCs value.

[0114] In the above embodiments, the oil fume sensor display device can display the real-time pollutant content in the room, allowing users to know the indoor oil fume situation and also reflecting the oil fume treatment effect of the range hood, making it convenient for users to control the operation of the range hood and improving the user experience.

[0115] Optionally, the detection component is located on the housing 10 directly above the air inlet 101, and the fume sensor display device displays the indoor PM and VOC values. This display can show the real-time pollutant content in the room, and thus reflect the fume treatment effect of the range hood from the side.

[0116] Optionally, the detection component is an oil fume sensor, preferably a four-in-one oil fume sensor that can test indoor temperature, relative humidity, PM value and VOCs.

[0117] Optionally, the display component is a display screen installed on the control panel of the range hood, located directly in front of the range hood, so that users can easily view it at any time.

[0118] PM is mainly particulate matter produced by combustion and high-temperature oil, and its fluctuation range is large. The main particulate matter removed by range hoods is PM, so the PM display value is generated quickly, the purification response is fast, and the removal effect is significant. However, PM also consists of some evaporated water vapor, and the PM value of the environment itself will also affect the range hood's ability to remove oil fumes. VOCs are mainly volatile organic compounds produced by particulate matter volatilization and thermal oxidation of food. After they are generated, they will remain in the space for a long time, and the concentration does not change significantly. The displayed value is always high, which will affect the user experience. Therefore, the following embodiments are proposed.

[0119] According to an embodiment of the present invention, in another aspect, a method for displaying oil fume information is provided, applicable to the above-mentioned range hood, in conjunction with... Figures 1 to 9 As shown, the display method includes the following steps:

[0120] Step S101: Obtain the actual PM and VOC values ​​in the indoor air;

[0121] Step S102: The actual PM value is reduced proportionally according to the preset variable ratio adjustment formula to obtain the displayed PM value, thereby narrowing the display range of the PM value.

[0122] Step S103: Generate a display curve based on the displayed PM value and the actual VOCs value, and display it on the display component of the range hood.

[0123] In the above embodiments, through experiments in actual scenarios such as stir-frying (pouring oil and stir-frying), boiling soup (normal state and boiling state), and boiling water, combined with the oil fume sensor digital display database, a variable-proportion algorithm for oil fume information is provided. This algorithm reduces the actual PM value proportionally according to a preset variable-proportion adjustment formula to obtain the displayed PM value. This reduces the range of values ​​displayed, allowing users to quickly see the trend of the displayed value (Figure 7 shows the digital display before the improvement). Figure 8 The improved digital display shows the PM particulate matter (PM) reading from the oil fume sensor (blue line) and the VOCs (void) reading from the oil fume sensor (orange line). This allows for dynamic feedback and rapid response of the flue gas, improving the user experience. It effectively addresses the problem that existing range hoods have a large display range between PM and actual VOCs values, making it difficult to quickly and intuitively observe changes in PM and VOCs values ​​during operation, leading to misunderstandings and negatively impacting the user experience.

[0124] In one embodiment, combined with Figures 1 to 3 as well as Figure 5 , Figure 8 As shown, a display curve is generated based on the displayed PM value and the actual VOCs value, and then displayed on the display component. The specific steps include:

[0125] Step S201: Generate a first display curve based on the displayed PM value, and generate a second display curve based on the actual VOCs value;

[0126] Step S202: Display the first display curve and the second display curve on the display component respectively.

[0127] In the above embodiments, by reducing the PM value display range from 35000 to less than 1000, the display range of 0 to 999 can be satisfied. After scaling down, the display range of PM value is reduced to 1 / 35 of the original, so that the change trend of VOCs can be seen more clearly and intuitively, and the user experience can be improved.

[0128] It should be noted that, in Figure 8 The blue line represents the PM particulate matter sensor reading, the orange line represents the VOCs gaseous pollutant sensor reading, and the vertical axis represents the digital display value of the fume sensor. VOCs are measured in μg / m³. 3 PM is measured in units, and can be treated as a digital display without a unit. Based on actual measured PM and VOC values ​​combined with user experience, a variable-proportion adjustment formula is used to reduce the PM value by a varying percentage. Based on a numerical simulation model, a relevant algorithm is fitted to keep all experimental values ​​within the display range.

[0129] In one embodiment, the variable proportional adjustment formula is P 显示 =P实际 / (1+P 实际 / n), where P 实际 P represents the actual PM value. 显示 To display PM values, 1000 < n < 1100.

[0130] In the above embodiments, P 实际 P represents the actual PM reading fed back by the fume sensor. 显示 This refers to the PM value that should be displayed on the range hood's display unit after the scaling factor adjustment, because the PM value varies greatly from 0 to 35000 (see [reference]). Figure 7 As shown), therefore, only the PM value was adjusted proportionally, keeping the displayed value range between 0 and 999 (see...). Figure 8 As shown in the figure, all PM and VOCs readings can be controlled within the display range, allowing users to quickly see the changing trends of VOCs that are not obvious.

[0131] Preferably, n is 1020.

[0132] In one embodiment, combined with Figures 1 to 3 as well as Figure 6 , Figure 9 As shown, a display curve is generated based on the displayed PM value and the actual VOCs value, and then displayed on the display component. Specifically, this includes:

[0133] Step S301: Correct the actual PM value using the first correction factor to obtain the corrected PM value;

[0134] Step S302: Correct the actual VOCs value using the second correction coefficient to obtain the corrected VOCs value;

[0135] Step S303: Add the PM correction value and the VOCs correction value to obtain the flue gas value, generate a third display curve based on the flue gas value, and display it on the display component of the range hood.

[0136] In the above embodiments, the flue gas value is defined based on PM value changes and VOCs index correction. Figure 9 The red line represents the smoke emission value, the green line represents the PM value, and the blue line represents the VOCs value. Based on extensive user experience research, a third display curve for the smoke emission value was fitted, which best integrates with the user experience in actual cooking scenarios. Based on this, the first and second correction coefficients were obtained. This is because the data displayed by the oil fume sensor is in PM (…). Figure 9 (middle green line) and VOCs ( Figure 9The two data points (blue line) cannot be directly used to represent the actual smoke emission level. Using PM alone, although the reading decreases, the smell of cooking is still noticeable. Using VOCs alone, the change in the reading is not significant; even without the odor, the value remains high. By combining actual user experience with these two data points, and using a database to fit the relationship between smoke emission level and PM and VOCs, a third display curve (red line in the diagram) is obtained. This third display curve is displayed on the display unit. By adjusting the obtained smoke emission value display, dynamic feedback and rapid response of smoke emission are achieved in different cooking scenarios, improving the user experience.

[0137] In one embodiment, a first correction coefficient is set as k1, and a second correction coefficient is set as k2, where k1 > k2, and k1 + k2 = 1. Since the PM content in the indoor environment is higher than the VOCs content during cooking, the corresponding first correction coefficient k1 is greater than the second correction coefficient k2.

[0138] Preferably, k1 = 0.75 and k2 = 0.25.

[0139] This invention utilizes the characteristics of abundant, high-density, and highly reactive plasma to combine physical interception under a strong electric field, integrating electro-purification technology with fume treatment. This achieves fume charging and collection, improving the fume purification efficiency of the range hood. Simultaneously, the collection end of the purification component can be cleaned periodically and reused, avoiding functional failures caused by damage to the microstructures such as the oleophobic coating in traditional self-cleaning methods, thus extending the product's lifespan. Furthermore, a four-in-one fume sensor provides real-time feedback on fume values, indirectly reflecting the purification device's fume treatment effect. A variable-ratio display algorithm is proposed to achieve dynamic feedback and rapid response of the fume. Real-time fume sensor readings from various cuisines (Sichuan, Northeastern, etc.) during soup making and boiling, combined with real-world user feedback, are used to perform sensory corrections to characterize the fume values ​​in the actual usage environment, generating a curve for display, thus enhancing product quality and user experience.

[0140] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A method for displaying oil fume information suitable for range hoods, characterized in that, The display method includes: Obtain the actual PM and VOC values ​​in indoor air; The actual PM value is reduced proportionally according to a preset variable ratio adjustment formula to obtain the displayed PM value, thereby narrowing the display range of the PM value. A display curve is generated based on the displayed PM value and the actual VOCs value, and then displayed on the display component of the range hood. The variable proportion adjusting formula is P 显示 =P 实际 / (1+ P 实际 / n),wherein P 实际 is an actual PM value, P 显示 is a displayed PM value, and 1000 < n < 1100.

2. The method for displaying oil fume information according to claim 1, characterized in that, The process of generating a display curve based on the displayed PM value and the actual VOCs value, and displaying it on the display component, specifically includes: A first display curve is generated based on the displayed PM value, and a second display curve is generated based on the actual VOCs value; The first display curve and the second display curve are respectively displayed on the display component.

3. A range hood that displays oil fume information using the oil fume information display method described in claim 1 or 2, characterized in that, The range hood includes: Shell (10); An oil fume sensing and display device is disposed on the housing (10), and the oil fume sensing and display device includes a detection component and a display component; The detection component and the display component are both connected to the controller of the range hood. The detection component is used to detect oil fume information in the indoor air, including PM value and VOCs value. The display component is adapted to display a display curve generated based on PM value and VOCs value.

4. The range hood according to claim 3, characterized in that, The housing (10) has an air inlet (101), an air outlet (102), and an oil fume treatment channel connecting the air inlet (101) and the air outlet (102). A plasma purification zone (20) and an anti-corona treatment zone (30) are sequentially arranged in the oil fume treatment channel along the airflow direction. A plasma discharge module is provided in the plasma purification zone (20) and is adapted to generate plasma by discharge so that the particulate matter in the oil fume flowing through the plasma purification zone (20) is charged and collected by the electric field. The anti-corona catalytic module (31) is disposed in the anti-corona treatment zone (30) and is adapted to generate anti-corona discharge in the anti-corona treatment zone (30) so that the gaseous pollutants in the oil fume are repeatedly oscillated in the anti-corona treatment zone (30) and adsorbed and / or decomposed; A pollutant interception component (40) is disposed between the anti-corona treatment zone (30) and the air outlet (102). The pollutant interception component (40) is provided with a number of micropores, which are suitable for intercepting small particulate matter in the oil fume.

5. The range hood according to claim 4, characterized in that, The anti-corona catalytic module (31) includes: High voltage electrode (311); The ground electrode (312) is spaced apart from the high-voltage electrode (311); An insulating dielectric structure (313) is disposed on the side of the ground electrode (312) close to the high voltage electrode (311). The insulating dielectric structure (313) is adapted to accumulate charge when the high voltage electrode (311) and the ground electrode (312) discharge, forming a reverse electric field and causing a reverse corona discharge.

6. The range hood according to claim 5, characterized in that, The insulating medium structure (313) is a honeycomb structure supported on activated carbon and / or catalyst; And / or, the ground electrode (312) is a mesh structure made of metal material, and the outer periphery of the mesh ground electrode (312) matches the inner periphery of the anti-corona treatment area (30); And / or, the high-voltage electrode (311) includes a plurality of metal discharge tips (3111) spaced apart.

7. The range hood according to any one of claims 4 to 6, characterized in that, The fume treatment channel also includes: A deflection settling zone (50) is located downstream of the anti-corona treatment zone (30), and the deflection settling zone (50) is located on the side of the anti-corona treatment zone (30). The pollutant interception component (40) is disposed between the deflection settling zone (50) and the back corona treatment zone (30), and the air outlet (102) is connected to the deflection settling zone (50); After being treated in the anti-corona treatment zone (30), the tiny particles in the oil fume are intercepted by the pollutant interception component (40), deflected through the micropores and enter the deflection settling zone (50), and discharged from the air outlet (102) after settling.

8. The range hood according to claim 7, characterized in that, The air outlet (102) is located in the lower middle part of the side wall of the housing (10); And / or, the contaminant interception component (40) is detachably disposed within the housing (10); And / or, a fan (60) is provided in the deflection settling zone (50).

9. The range hood according to claim 7, characterized in that, The air inlet (101) is located in the middle of the bottom wall of the housing (10), and a partition plate (70) is provided inside the housing (10). One end of the partition plate (70) is fixed to the bottom wall of the housing (10), and the other end is set at a set distance from the top wall of the housing (10). The pollutant interception component (40) includes an interception plate disposed between the other end of the partition plate (70) and the top wall of the housing (10). Both the partition plate (70) and the interceptor plate are cylindrical. The plasma purification zone (20) is formed on the inner periphery of the partition plate (70), the anti-corona treatment zone (30) is formed on the inner periphery of the interceptor plate, and the deflection settling zone (50) is formed between the outer periphery of the partition plate (70) and the interceptor plate and the inner wall of the shell (10).

10. The range hood according to claim 7, characterized in that, The housing (10) has air outlets (102) on its opposite side walls that are adapted to communicate with the deflection settling zone (50). The range hood also includes two sets of fans (60) arranged in the deflection settling zone (50). The two sets of fans (60) are arranged one-to-one with the two air outlets (102) to drive the oil fumes from the air inlet (101) into the oil fume treatment channel and out from the air outlet (102).

11. The range hood according to any one of claims 4 to 6, characterized in that, The range hood also includes an oil-blocking mesh disposed at the air inlet (101), the oil-blocking mesh being adapted to intercept large particles and / or oil droplets in the fumes.

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