Range hood

Abstract

The utility model discloses a range hood and relates to the field of kitchen appliances. The problem that an existing range hood cannot meet the miniaturization design requirement is solved. The range hood comprises a hood, a fan assembly and a purification assembly. An accommodating cavity and an air inlet for communicating the accommodating cavity with the outside of the range hood are formed in the hood; the fan assembly is arranged in the containing cavity and connected with the hood, and the fan assembly is used for exhausting air. The purification assembly is arranged in the containing cavity, the purification assembly is connected with the hood, the purification assembly comprises a noise reduction part and an aldehyde removal part, and air pumped and discharged by the fan assembly can pass through the noise reduction part and the aldehyde removal part. Wherein the formaldehyde removal part has activity and can purify air, and the noise reduction part is used for reducing noise. Therefore, the problem that an existing range hood cannot meet the miniaturization design requirement is solved.

Description

Technical Field

[0001] The utility model relates to the field of kitchen appliances, in particular to a range hood. Background Art

[0002] With the acceleration of urbanization and the compression of living space, kitchen space has become increasingly limited. In order to adapt to the miniaturized kitchen space, the range hood also needs to be reduced in size to save space and facilitate installation. In addition, as people's requirements for quality of life continue to increase, the functions of range hoods are also increasing.

[0003] In the related art, some range hoods, in addition to the function of extracting oil fumes, are also equipped with a noise reduction device, a filtering device, a formaldehyde removal device, a gas detection device, etc. to increase the functions of the range hood.

[0004] However, the more functions a range hood has, the more corresponding components it has. Installing more components in the range hood will occupy more space, which is not conducive to the miniaturization design demand of the range hood. Utility Model Content

[0005] The embodiment of the utility model provides a range hood, which solves the problem that the existing range hoods cannot meet the requirements of miniaturization design.

[0006] In order to achieve the above object, the embodiment of the utility model adopts the following technical solution:

[0007] In a first aspect, an embodiment of the present application provides a range hood, comprising a hood, a fan assembly and a purification assembly. The hood forms a receiving cavity and an air inlet connecting the receiving cavity with the outside of the range hood. The fan assembly is disposed in the receiving cavity and connected to the hood, and the fan assembly is used to exhaust air. The purification assembly is disposed in the receiving cavity, the purification assembly is connected to the hood, and the purification assembly includes a noise reduction part and a formaldehyde removal part, and the air exhausted by the fan assembly can pass through the noise reduction part and the formaldehyde removal part. Among them, the formaldehyde removal part is active and can purify the air, and the noise reduction part is used to reduce noise.

[0008] The range hood in the present application can draw indoor air into the containing chamber through the fan assembly, and during the air flow, the air can pass through the purification assembly, thereby reducing the noise generated during the air flow through the noise reduction part of the purification assembly, and removing formaldehyde in the air through the formaldehyde removal part of the purification assembly.

[0009] In this way, the purification component can simultaneously achieve the functions of noise reduction and formaldehyde removal through the formaldehyde removal part and the noise reduction part. Therefore, there is no need to separately set up a noise reduction device and a formaldehyde removal device inside the range hood. In this way, the components inside the range hood can be more integrated, which is conducive to meeting the miniaturization requirements of the range hood and further improving the space utilization inside the range hood.

[0010] In this way, the present application only needs to utilize the purification component to achieve two functions, namely, the purification component can reduce the noise generated during the operation of the range hood and eliminate formaldehyde in the exhaust air of the range hood. Thus, the present application solves the problem of low utilization of the internal space of the range hood.

[0011] In some embodiments, the purification component includes a substrate, a plurality of noise reduction holes are formed on the surface of the substrate, and the plurality of noise reduction holes form a noise reduction part. The substrate includes at least one of an activated carbon plate or an activated manganese plate to form a formaldehyde removal part.

[0012] In some embodiments, the purification component includes a substrate and a formaldehyde removal active agent, a plurality of noise reduction holes are formed on the surface of the substrate, and the plurality of noise reduction holes form a noise reduction portion. The formaldehyde removal active agent includes at least one of activated manganese and activated carbon, and the formaldehyde removal active agent is sprayed on the substrate to form the formaldehyde removal portion.

[0013] In some embodiments, the purification component includes a substrate and an active filter element, a plurality of noise reduction holes are formed on the surface of the substrate, and the plurality of noise reduction holes form a noise reduction portion. The active filter element is connected to the substrate to form a formaldehyde removal portion, and the active filter element includes at least one of an activated carbon filter element and an active manganese filter element.

[0014] In some embodiments, the active filter element includes a plurality of filter elements, one filter element corresponds to one noise reduction hole and is fixed in the noise reduction hole.

[0015] In some embodiments, the active filter element includes an active filter screen, which is connected to the substrate and is located on one side of the substrate along the thickness direction of the substrate.

[0016] In some embodiments, the active filter element includes an activated carbon filter and an activated manganese filter, wherein along the thickness direction of the substrate, the activated manganese filter is connected to one side surface of the substrate, and the active manganese filter is connected to one side surface of the active manganese filter away from the substrate.

[0017] In some embodiments, the range hood further includes a cleaning component, which is disposed in the accommodating cavity and can clean the surface of the fan component by heating. The heat generated by the cleaning component can be transferred to the formaldehyde removal part.

[0018] In some embodiments, the cleaning component includes an electric heating film, which covers the surface of the fan component and is used to clean the fan component; and / or, the cleaning component includes a steam generator, which is connected to the hood and has a steam outlet, which faces the fan component.

[0019] In a second aspect, an embodiment of the present application further provides a range hood, comprising a hood, a fan assembly and a purification assembly, the hood comprising a fan hood and a fume collecting hood, the fan hood forming a first accommodating chamber and an air outlet connecting the first accommodating chamber with the outside of the range hood, the fume collecting hood forming a second accommodating chamber and an air inlet connecting the second accommodating chamber with the outside of the range hood, the first accommodating chamber being connected to the second accommodating chamber. The fan assembly is disposed in the first accommodating chamber, and the fan assembly is connected to the fan hood for exhausting air. The purification assembly is disposed in the accommodating chamber, and the purification assembly is connected to the fan hood, and the purification assembly comprises a noise reduction portion and a formaldehyde removal portion, and the air exhausted by the fan assembly can pass through the noise reduction portion and the formaldehyde removal portion. Among them, the formaldehyde removal portion is used to purify air, and the noise reduction portion is used to reduce noise.

[0020] The beneficial effects described in the second aspect of this application can be referred to the analysis of the beneficial effects of the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 One of the structural diagrams of a range hood provided in an embodiment of the present application;

[0022] Figure 2 A second structural diagram of a range hood provided in an embodiment of the present application;

[0023] Figure 3 A third structural diagram of a range hood provided in an embodiment of the present application;

[0024] Figure 4 A fourth structural diagram of a range hood provided in an embodiment of the present application;

[0025] Figure 5 A fifth structural diagram of a range hood provided in an embodiment of the present application;

[0026] Figure 6 A sixth structural diagram of a range hood provided in an embodiment of the present application;

[0027] Figure 7 The seventh structural diagram of a range hood provided in an embodiment of the present application;

[0028] Figure 8 An eighth structural diagram of a range hood provided in an embodiment of the present application;

[0029] Fig. 9 A ninth structural diagram of a range hood provided in an embodiment of the present application;

[0030] Fig.10 A tenth structural diagram of a range hood provided in an embodiment of the present application;

[0031] Fig.11The eleventh structural diagram of a range hood provided in an embodiment of the present application;

[0032] Fig.12 The twelfth structural diagram of a range hood provided in an embodiment of the present application;

[0033] Fig.13 The thirteenth structural diagram of a range hood provided in an embodiment of the present application;

[0034] Fig.14 One of the flow charts of a method for controlling a range hood provided in an embodiment of the present application;

[0035] Fig.15 A second flowchart of a range hood control method provided in an embodiment of the present application;

[0036] Fig.16 A third flowchart of a range hood control method provided in an embodiment of the present application;

[0037] Fig.17 A fourth flowchart of a method for controlling a range hood provided in an embodiment of the present application;

[0038] Fig.18 A fifth flowchart of a method for controlling a range hood provided in an embodiment of the present application;

[0039] Fig.19 Flow chart six of a method for controlling a range hood provided in an embodiment of the present application;

[0040] Fig. 20 This is flow chart seven of a method for controlling a range hood provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] The embodiments of the utility model are described in detail below with reference to the accompanying drawings.

[0042] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0043] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0044] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, when describing pipelines or channels, the "connected" and "connected" used in this application have the meaning of conduction. The specific meaning needs to be understood in conjunction with the context.

[0045] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0046] As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of deviation from the particular value, where the acceptable range of deviation is determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0047] Formaldehyde is a common indoor pollutant and a toxic gas. Long-term exposure or inhalation of formaldehyde may cause health problems such as headaches, eye irritation, throat discomfort, allergic reactions, and breathing difficulties. Formaldehyde is also considered a carcinogen and may increase the risk of leukemia and nasopharyngeal cancer.

[0048] When the range hood starts to work, the fan assembly 200 inside the range hood can discharge air pollutants such as formaldehyde in the indoor air to the outside, thereby playing a role in purifying the air.

[0049] In order to further improve the air purification effect of the range hood, a filter containing activated carbon can be provided at the air inlet 102 of the range hood. The activated carbon can adsorb pollutants such as formaldehyde and prevent the range hood from polluting the external environment when emitting gas.

[0050] However, due to the limited adsorption capacity of activated carbon, after long-term use, the adsorption capacity of activated carbon will gradually weaken, affecting the formaldehyde removal effect. In order to maintain the formaldehyde removal effect, the activated carbon filter 3021 at the air inlet 102 needs to be replaced regularly, which will increase the use cost and maintenance cost.

[0051] In order to solve the above-mentioned technical problems, on the first aspect, the embodiments of the present application provide a range hood, which can reduce production costs and save energy while ensuring the formaldehyde removal effect of the range hood.

[0052] Among them, the range hood in the present application can be a side-suction range hood, a top-suction range hood, etc., and the present application does not limit this.

[0053] See also Figure 1 The range hood in the present application includes a hood 100, which is used to place the components of the range hood and collect and remove harmful gases such as oil smoke, smoke and steam generated on the stove.

[0054] In some embodiments, see Figure 2 The hood 100 forms a receiving cavity 101 for mounting range hood components.

[0055] In some embodiments, see Figure 1 Combined with Figure 2 The hood 100 forms an air inlet 102 connecting the accommodating cavity 101 with the outside of the range hood. The oil smoke generated during cooking and the air around the range hood can enter the accommodating cavity 101 of the hood 100 through the air inlet 102, and are discharged to the outside after passing through the accommodating cavity 101.

[0056] In some embodiments, see Figure 1 Combined with Figure 2 The hood 100 includes a smoke collecting hood 105, which forms an air inlet 102 connecting the accommodating chamber 101 with the outside of the range hood. The air inlet 102 formed by the smoke collecting hood 105 faces the stove. The smoke collecting hood 105 is used to collect harmful gases such as oil smoke, smoke and steam generated by the stove to prevent the oil smoke from spreading to the indoor environment.

[0057] In some embodiments, see Figure 1 and Figure 2The hood 100 further includes a fan hood 104, which is located on the upper side of the smoke collecting hood 105 and is used to discharge the harmful gases collected by the smoke collecting hood 105 to the outside. In addition, the fan hood 104 can also reduce noise and vibration, and improve the working stability and safety of the range hood.

[0058] In some embodiments, see Figure 2 The fan cover 104 forms a first accommodating chamber 1011 and an air outlet 103 connecting the first accommodating chamber 1011 with the outside of the range hood, the smoke collecting hood 105 forms a second accommodating chamber 1012 and an air inlet 102 connecting the second accommodating chamber 1012 with the outside of the range hood, and the first accommodating chamber 1011 is connected to the second accommodating chamber 1012, so that the fan cover 104 is connected to the smoke collecting hood 105.

[0059] It can be understood that the accommodating chamber 101 of the range hood includes a first accommodating chamber 1011 and a second accommodating chamber 1012 .

[0060] In some embodiments, the range hood in the present application includes a fan assembly 200, which is disposed in the accommodating cavity 101 and connected to the hood 100, and the fan assembly 200 is used to exhaust air.

[0061] Specifically, the fan assembly 200 is disposed in the first accommodating chamber 1011 .

[0062] Under the suction action of the fan assembly 200, the range hood can suck harmful gases such as oil smoke, smoke, and steam into the first accommodating chamber 1011 and the second accommodating chamber 1012 through the air intake port for purification, and then generate a strong exhaust force through the fan blades inside the fan assembly 200 to discharge the treated gas to the outside through the air outlet 103, thereby effectively purifying the kitchen air and keeping the indoor air fresh.

[0063] In some embodiments, the range hood in the present application includes a cleaning component, which is disposed in the accommodating cavity 101, and the cleaning component can clean the surface of the fan component 200 by heating, thereby maintaining the exhaust effect of the range hood and extending its service life.

[0064] For example, see Figure 3 The cleaning component includes an electric heating film 700, which covers the surface of the fan component 200. By energizing the electric heating film 700, the electric heating film 700 can be heated, thereby applying heat to the fan component 200 to melt the oil on the surface of the fan component 200, thereby cleaning the fan component 200.

[0065] The working temperature of the electric heating film 700 is between 80°C and 90°C.

[0066] Specifically, see Figure 4 The fan assembly 200 includes a volute 201, which is a curved outer shell for guiding airflow. The electric heating film 700 is bonded to the surface of the volute 201. When the electric heating film 700 is energized, it can generate heat, thereby heating the volute 201 and the air inside it.

[0067] On the one hand, the grease on the surface of the volute 201 can be softened by heat, making it easier to drip from the surface of the fan assembly 200; on the other hand, the electric heating film 700 can also heat the temperature of the surrounding gas, thereby accelerating the flow rate of the gas, further enhancing the exhaust effect of the range hood.

[0068] Exemplarily, the cleaning component includes a steam generator, which is connected to the hood 100 , and the steam generator is provided with a steam outlet, which is directed toward the fan assembly 200 .

[0069] The temperature of the steam generator during operation is between 100°C and 105°C.

[0070] Specifically, the steam generated by the steam generator can flow to the fan assembly 200 through the steam outlet. On the one hand, the steam can transfer heat to the fan assembly 200, and the grease on the surface of the fan assembly 200 is softened by the heat and is easier to drip. On the other hand, the heat of the steam can be transferred to the surrounding gas, so that the gas temperature around the fan assembly 200 increases, thereby accelerating the gas flow rate, further enhancing the extraction effect of the range hood.

[0071] The following uses the cleaning component including the electric heating film 700 as an example to schematically illustrate some embodiments of the present utility model.

[0072] In some embodiments, see Figure 5 The range hood in the present application includes a formaldehyde-removing active component 300, which is connected to the hood 100. The air exhausted by the fan assembly 200 can pass through the formaldehyde-removing active component 300, and the formaldehyde-removing active component 300 is used to eliminate formaldehyde in the air.

[0073] In some embodiments, the formaldehyde removal active component 300 in the present application includes a formaldehyde removal active agent, which includes at least one of activated manganese and activated carbon, and at least one of activated manganese and activated carbon constitutes the active component of the formaldehyde removal active agent, so that the formaldehyde removal active agent can absorb formaldehyde molecules in the air, thereby purifying the air. The formaldehyde removal active agent is sprayed on the surface of the hood 100 located in the accommodating cavity 101 to eliminate formaldehyde in the air exhausted by the fan assembly 200.

[0074] Exemplarily, the active ingredient of the formaldehyde removal agent includes active manganese. In this case, the range hood can utilize the catalytic effect of active manganese to convert formaldehyde into non-toxic carbon dioxide and water.

[0075] Exemplarily, the active ingredient of the formaldehyde removal agent includes activated carbon. In this case, the range hood can utilize the adsorption effect of the activated carbon to adsorb formaldehyde into the activated carbon.

[0076] Exemplarily, the active ingredients of the formaldehyde removal agent include activated manganese and activated carbon. In this case, the range hood can simultaneously utilize the catalytic effect of the activated manganese and the adsorption effect of the activated carbon to remove formaldehyde.

[0077] Among them, activated carbon is a specially treated carbon with a large number of micropores and mesopores. These micropores and mesopores can adsorb gas molecules and organic compounds. In this way, harmful substances such as formaldehyde can be adsorbed on the surface of activated carbon, thereby achieving the purpose of purifying the air.

[0078] In addition, active manganese is a catalytic material with manganese dioxide as its main component. Under the catalytic action of active manganese, formaldehyde molecules can undergo an oxidation reaction with oxygen to generate harmless carbon dioxide and water. The specific reaction formula is as follows:

[0079]

[0080] In the above reaction formula (1), HCHO is the chemical formula of formaldehyde, O2 is the chemical formula of oxygen, CO2 is the chemical formula of carbon dioxide, and H2O is the chemical formula of water.

[0081] On the one hand, under the catalytic action of active manganese, formaldehyde can react with oxygen to be converted into harmless carbon dioxide and water. It can be understood that through the above chemical reaction, formaldehyde in the air can be completely removed, and it has a high formaldehyde removal ability.

[0082] On the other hand, active manganese participates in the above-mentioned oxidation reaction as a catalyst. The content and catalytic ability of active manganese do not change during the reaction. It can be understood that active manganese can continuously participate in the formaldehyde removal process, can be continuously reused, and has a long service life.

[0083] In addition, active manganese can also remove other harmful gases in the air besides formaldehyde, such as benzene, ammonia, etc., and has a wide range of purification capabilities.

[0084] It is understandable that active manganese has a higher formaldehyde removal efficiency, a longer service life and a wider purification capacity. It can comprehensively purify the air inside the range hood, thereby improving the air purification rate of the range hood and ensuring the indoor air quality. Moreover, after being catalyzed by active manganese, formaldehyde can be completely eliminated without causing secondary pollution problems, further protecting the environment.

[0085] On this basis, after the formaldehyde-removing active agent having active ingredients is sprayed on the hood 100, when the range hood exhausts air, the air can come into contact with the formaldehyde-removing active agent, thereby eliminating harmful substances such as formaldehyde in the air.

[0086] Further, see Figure 5 When the electric heating film 700 is turned on, the heat generated by the electric heating film 700 can be transferred to the air and the formaldehyde-removing active agent. On the one hand, the flow rate of the air is increased after the air temperature rises, which enables the formaldehyde-removing active agent to contact a large amount of air, thereby improving the air purification efficiency of the range hood. On the other hand, after the temperature rises, the activity of the formaldehyde-removing active agent is also enhanced, which can better absorb pollutants in the air such as formaldehyde.

[0087] Specifically, for active manganese, at high temperature, the thermal motion of molecules intensifies, the collision frequency between molecules increases, and the reaction rate in the above reaction formula (1) is increased; at the same time, the activation energy of the catalytic reaction can be reduced when the temperature rises. At high temperature, the energy of the molecules increases, and the bond energy between the active manganese and the reactants is more easily destroyed, thereby reducing the activation energy of the above reaction formula (1), making the above reaction formula (1) more likely to occur; the temperature rise can also change the reaction equilibrium, so that the reaction proceeds in a favorable direction, that is, in the above reaction formula (1), formaldehyde and oxygen can react more easily to generate carbon dioxide and water. Therefore, active manganese can achieve a better formaldehyde removal effect when the temperature rises.

[0088] For activated carbon, the increase in temperature will increase the adsorption rate and capacity of activated carbon. When the temperature rises, the thermal motion of molecules is enhanced, the collision frequency between molecules increases, and activated carbon can generate new and expand the original pores, improve the microporous structure, increase activity, and facilitate the interaction between activated carbon and pollutants such as formaldehyde. At the same time, the increase in temperature can also reduce the activation energy required for the activated carbon to undergo adsorption reaction, thereby promoting the adsorption process.

[0089] It should be noted that when the cleaning component in the present application is working, its heating temperature does not cause damage to the pore structure of the activated carbon or deactivation of the active sites, thereby reducing its adsorption performance.

[0090] It can be understood that the formaldehyde removal process of activated manganese and activated carbon in the following embodiments is consistent with the above content, and this application will not go into details.

[0091] In some embodiments, the formaldehyde-removing active component 300 includes an active filter element, which includes at least one of an activated carbon filter element and an active manganese filter element. By placing the active filter element in the accommodating chamber 101 of the range hood, pollutants such as formaldehyde in the air in the accommodating chamber 101 can be effectively removed.

[0092] In some embodiments, the active filter element may be a plurality of filter elements 301, and the filter element 301 may be a block-shaped active filter element 301. By placing a plurality of filter elements 301 in the accommodating cavity 101 or at the air intake port, the air exhausted by the range hood can pass through the plurality of filter elements 301, and pollutants such as formaldehyde in the air can be eliminated by the plurality of block-shaped active filter elements 301.

[0093] Exemplarily, the plurality of filter elements 301 include an active manganese filter element, and in this case the range hood can utilize the catalytic effect of the active manganese to convert formaldehyde into non-toxic carbon dioxide and water.

[0094] Exemplarily, the plurality of filter elements 301 include an activated carbon filter element, and in this case the range hood can utilize the adsorption effect of the activated carbon to adsorb formaldehyde into the activated carbon.

[0095] Exemplarily, the plurality of filter elements 301 include an activated carbon filter element and an activated manganese filter element. In this case, the range hood can simultaneously utilize the catalytic effect of the activated manganese and the adsorption effect of the activated carbon to remove formaldehyde.

[0096] In some embodiments, the active filter element includes an active filter 302. At this time, the active filter 302 is placed through the air inlet 102 of the range hood or inside the range hood. Pollutants such as formaldehyde in the air inhaled by the range hood can pass through the active filter 302 and can be absorbed by the active filter 302, thereby achieving the purpose of removing formaldehyde.

[0097] The active filter 302 may be a single layer or multiple layers, which is not limited in the present application.

[0098] Exemplarily, the active filter 302 includes an active manganese filter 3022 , and in this case the range hood can utilize the catalytic effect of active manganese in the active manganese filter 3022 to convert formaldehyde into non-toxic carbon dioxide and water.

[0099] Exemplarily, the activated filter 302 includes an activated carbon filter 3021 , and the range hood can utilize the adsorption effect of the activated carbon in the activated carbon filter 3021 to adsorb formaldehyde into the activated carbon.

[0100] Exemplarily, the active filter 302 includes an activated carbon filter 3021 and an activated manganese filter 3022. In this case, the range hood can simultaneously utilize the catalytic effect of the activated manganese and the adsorption effect of the activated carbon to remove formaldehyde.

[0101] When the activated filter 302 includes an activated carbon filter 3021 and an activated manganese filter 3022 , the activated filter 302 can be a single layer or multiple layers of the activated carbon filter 3021 and the activated manganese filter 3022 , or a multiple layer of the activated carbon filter 3021 and the activated manganese filter 3022 stacked together.

[0102] Furthermore, when the electric heating film 700 is turned on, the heat generated by the electric heating film 700 can be transferred to the air and the active filter element. As can be seen from the above description, in the process of exhausting air from the range hood in the present application, the air can pass through the formaldehyde removal active element 300 connected to the hood 100, and the formaldehyde removal active element 300 can filter out pollutants in the air and eliminate pollutants such as formaldehyde, thereby purifying the indoor air. At the same time, the gas discharged to the outside by the range hood is also purified, further protecting the environment.

[0103] Furthermore, in the present application, the heat generated by the cleaning component during operation can be used to enhance the activity of the formaldehyde removal active component 300, so that the formaldehyde removal ability and air purification effect of the formaldehyde removal active component 300 are further enhanced, thereby further improving the indoor air quality, protecting the health of the user, and improving the comfort of the indoor environment.

[0104] In some embodiments, see Figure 6 The range hood in the present application also includes an oil net 400, which is connected to the hood 100 and can cover the air inlet 102. The oil net 400 can filter the air exhausted by the range hood, and can filter the grease particles and dirt in the oil smoke to prevent them from entering the accommodating cavity 101 of the range hood and the inside of the fan assembly 200, thereby reducing the pollution of the range hood by the oil smoke.

[0105] Furthermore, the oil net 400 is connected to the formaldehyde removal active component 300. In this way, the range hood can not only use the oil net 400 to filter the grease particles and dirt in the air inhaled by the range hood at the air inlet 102, but also use the formaldehyde removal active component 300 to eliminate pollutants such as formaldehyde in the inhaled air, so as to avoid the mixture of harmful gases and oil smoke to cause damage to the internal components of the range hood, thereby further extending the service life of the range hood.

[0106] In some embodiments, the formaldehyde-removing active component 300 includes a formaldehyde-removing active agent, which is sprayed on the surface of the oil net 400. At this time, the user can replenish the spray of the formaldehyde-removing active agent after using it for a period of time, so that the range hood can maintain a good formaldehyde removal effect.

[0107] In some embodiments, see Figure 6The formaldehyde removal active component 300 includes a plurality of filter elements 301, and the filter elements 301 are hollow to ensure the extraction efficiency of the range hood. The oil net 400 forms a plurality of mesh holes 401, and one filter element 301 corresponds to one mesh hole 401. The filter element 301 can be embedded in and fixed inside the mesh hole 401. In this way, the range hood can add the formaldehyde removal function on the basis of keeping the original structure unchanged. There is no need to add an installation gap for installing the formaldehyde removal active component 300. Moreover, the filter element 301 is installed in the mesh hole 401, which can facilitate the user to disassemble and replace the filter element 301 to avoid the range hood's formaldehyde removal ability from decreasing with the increase of usage time.

[0108] Exemplarily, the horizontal cross-section of the filter element 301 is hexagonal, so that the filter element 301 can provide a larger filtering surface, which means that more air can pass through the filter element 301, thereby improving the filtering efficiency.

[0109] Exemplarily, the shape of the mesh 401 of the oil net 400 matches the filter element 301 , so that the filter element 301 can be embedded and stably fixed inside the mesh 401 .

[0110] In some embodiments, see Figure 7 The formaldehyde-removing active component 300 includes an active filter 302, which covers the surface of the oil net 400, so that when the air enters the air inlet 102, not only the particulate matter can be filtered out, but also pollutants such as formaldehyde in the air can be eliminated.

[0111] The active filter 302 may be located on a side surface of the oil net 400 close to the accommodating cavity 101 , or may be located on a side surface of the oil net 400 away from the accommodating cavity 101 , and this is not limited thereto.

[0112] The following uses the example that the active filter screen 302 is located on a side surface of the oil screen 400 away from the accommodating chamber 101 to schematically illustrate some embodiments of the present invention.

[0113] In some embodiments, see Figure 7 The active filter 302 includes a multi-layer filter formed by stacking an activated carbon filter 3021 and an active manganese filter 3022. In this way, formaldehyde can not only be adsorbed by the activated carbon, but also produce non-toxic carbon dioxide and water through the catalytic action of active manganese, further improving the formaldehyde removal effect of the range hood.

[0114] Furthermore, the oil net 400, the activated carbon filter 3021 and the activated manganese filter 3022 are arranged in sequence along the air flow direction. In this way, the air inhaled by the range hood first passes through the oil net 400 at the air inlet 102 for initial filtration of grease particles and dirt, and the fumes after the initial filtration are sequentially purified through the activated carbon filter 3021 and the activated manganese filter 3022. Such an arrangement can not only fully perform purification treatments such as formaldehyde removal on the air, but also prevent the activated carbon filter 3021 and the activated manganese filter 3022 from contacting with grease particles and dirt in the inhaled air, thereby further extending the service life of the activated carbon filter 3021 and the activated manganese filter 3022 and saving costs.

[0115] Alternatively, see Figure 7 The activated carbon filter 3021, the activated manganese filter 3022 and the oil net 400 are arranged in sequence along the air flow direction. In this way, the user can replace the activated carbon filter 3021 and the activated manganese filter 3022 without removing the oil net 400, which is easy to operate and improves the user experience.

[0116] In the direction of air flow, the air first passes through the activated carbon filter 3021 and then passes through the activated manganese filter 3022. The formaldehyde that the activated carbon fails to absorb can undergo an oxidation reaction when passing through the activated manganese filter 3022. In this way, it can be ensured that the formaldehyde in the air can be completely processed, and the air purification rate of the range hood is greatly improved. In addition, due to the high cost of activated manganese, the combined use of the activated carbon filter 3021 and the activated manganese filter 3022 can further save production costs and user usage costs.

[0117] In some embodiments, see Figure 8 The range hood in the present application also includes a purification component 500, which is disposed in the accommodating cavity 101 and connected to the hood 100. The purification component 500 includes a noise reduction portion 502 and a formaldehyde removal portion 501. The air exhausted by the fan component 200 can pass through the noise reduction portion 502 and the formaldehyde removal portion 501.

[0118] The formaldehyde removal part 501 is active and can purify the air, and the noise reduction part 502 is used to reduce noise. The formaldehyde removal part 501 and the noise reduction part 502 are connected together.

[0119] Through the above arrangement, in the process of drawing the indoor air into the containing chamber through the fan assembly, the air can pass through the purification assembly, thereby reducing the noise generated during the air flow through the noise reduction part 502 of the purification assembly, and removing formaldehyde in the air through the formaldehyde removal part of the purification assembly.

[0120] In this way, through the purification component 500, the formaldehyde removal part 501 and the noise reduction part 502 can be connected together and installed as a whole in the hood to achieve the functions of noise reduction and formaldehyde removal. Therefore, there is no need to separately set up a noise reduction device and a formaldehyde removal device. In this way, the components in the range hood can be more integrated, which is conducive to meeting the miniaturization requirements of the range hood and further improving the space utilization inside the range hood.

[0121] Among them, the purification component 500 can be arranged in the first accommodating cavity 1011 of the fan cover 104, or in the second accommodating cavity 1012 of the smoke collection hood 105, or partially in the first accommodating cavity 1011 and partially in the second accommodating cavity 1012, which is not limited in the present application.

[0122] The following takes the purification component 500 disposed in the fan cover 104 as an example to schematically illustrate some embodiments of the present utility model.

[0123] In some embodiments, the purification component 500 includes a substrate, and the substrate is used to set the noise reduction part 502 and the formaldehyde removal part 501.

[0124] In some embodiments, a plurality of noise reduction holes are formed on the surface of the substrate, and the plurality of noise reduction holes form a noise reduction portion 502. When sound waves pass through the holes of the noise reduction holes, the sound waves will be scattered and refracted multiple times inside the holes of the noise reduction holes, so that the capacity of the sound waves gradually decreases during the transmission process, thereby achieving the purpose of noise reduction.

[0125] It should be noted that the noise reduction hole can be a circular hole, a square hole or an irregularly shaped hole, and this application does not limit this.

[0126] In some embodiments, see Figure 8 as well as Fig. 9 The substrate includes at least one of an activated carbon plate or an activated manganese plate 503 to form a formaldehyde removal portion 501 .

[0127] Understandably, see Fig. 9 The substrate can be directly formed by at least one of the activated carbon plate or the activated manganese plate 503 having the formaldehyde removal function, and a plurality of noise reduction holes are formed on the surface of at least one of the activated carbon plate or the activated manganese plate 503, and the plurality of noise reduction holes form the noise reduction part 502.

[0128] Exemplarily, the activated manganese plate 503 and the activated carbon plate are honeycomb-shaped, which can effectively absorb sound waves, reduce noise propagation, and improve the comfort of the indoor environment.

[0129] In some embodiments, the purification component 500 includes a formaldehyde removal active agent, which includes at least one of activated manganese and activated carbon. The formaldehyde removal active agent is sprayed on the substrate to form a formaldehyde removal portion 501 .

[0130] In some embodiments, the substrate is composed of aluminum honeycomb core, plastic honeycomb, sponge, aluminum foil mesh, foam ceramic, foam metal and the like, and a formaldehyde removal activator containing at least one of activated manganese and activated carbon is sprayed on the surface of the plate.

[0131] On this basis, the above substrate is honeycomb-shaped. On the one hand, the honeycomb-shaped substrate has a large number of small honeycomb units, which form a complex acoustic path, which can effectively absorb and dissipate sound wave energy, thereby achieving a good sound absorption effect. On the other hand, multiple honeycomb holes are formed on the surface of the substrate, which further increases the contact area between the substrate and the air and improves the formaldehyde removal effect of the substrate.

[0132] In other embodiments, the substrate is a noise reduction sponge, which is connected to the fan cover 104, and a formaldehyde removal agent containing at least one of activated manganese and activated carbon is sprayed on the surface of the substrate. At least one of the activated manganese and activated carbon constitutes the active ingredient of the formaldehyde removal agent. Therefore, the substrate can purify the air using the active ingredient while achieving the noise reduction function.

[0133] In some embodiments, the purification component 500 includes an active filter element connected to a substrate to form a formaldehyde removal section 501 .

[0134] In some embodiments, the activated filter comprises at least one of an activated carbon filter and an activated manganese filter.

[0135] As can be seen from the above content, the active filter element may include multiple filter elements 301, and may also include an active filter screen 302, and the specific content will not be repeated here.

[0136] Exemplarily, when the active filter element includes a plurality of filter elements 301 , one filter element 301 corresponds to one noise reduction hole and is fixed in the noise reduction hole.

[0137] Exemplarily, when the active filter element includes an active filter screen 302, the active filter screen 302 is connected to the substrate, the active filter screen 302 covers the surface of the substrate, and along the thickness direction of the substrate, the active filter screen 302 is located on one side of the substrate, so that the active filter screen 302 can fully contact with the air to achieve the purpose of removing formaldehyde.

[0138] Furthermore, the activated filter 302 includes an activated carbon filter 3021 and an activated manganese filter 3022. Along the thickness direction of the substrate, the activated manganese filter 3022 is connected to one side surface of the substrate, and the activated carbon filter 3021 is connected to one side surface of the activated manganese filter 3022 away from the substrate.

[0139] In this way, the air inside the range hood can be further purified by utilizing the adsorption effect of the activated carbon filter 3021 and the catalytic effect of the activated manganese filter 3022.

[0140] Furthermore, when the cleaning component is working, the surface of the fan component 200 is cleaned by heating, and the heat generated can be transferred to the formaldehyde removal part 501, thereby improving the activity of the formaldehyde removal part 501 and further improving the formaldehyde removal effect and efficiency of the purification component 500.

[0141] In some embodiments, see Fig.10 The range hood in the present application also includes a mounting frame 504, which is used to fix the substrate. The mounting frame 504 and the cover plate of the fan cover 104 form an installation space 5042, and the substrate is arranged in the installation space 5042. Therefore, the substrate can be further stabilized in the first accommodating cavity 1011, thereby improving the stability of the formaldehyde removal and noise reduction work of the purification component 500.

[0142] Furthermore, the mounting frame 504 is disposed in the first accommodating cavity 1011, and a plurality of through holes 5041 are formed on the surface of the mounting frame 504 close to the fan assembly 200. Before the air enters the mounting space 5042 and contacts the substrate, the air first passes through the plurality of through holes 5041 to perform an initial filtration on particulate matter in the air, and then contacts the formaldehyde removal part of the purification assembly 500, thereby extending the service life of the formaldehyde removal part of the purification assembly 500.

[0143] At the same time, the through hole 5041 also has a certain noise reduction effect, further improving the noise reduction capability of the purification component 500.

[0144] Exemplarily, the aperture of the through hole 5041 ranges from 3 mm to 6 mm, and in order to ensure the contact area between the substrate and the air, the total area of ​​the plurality of through holes is greater than 60% of the total surface area of ​​the mounting frame 504 close to the fan assembly 200 .

[0145] In some embodiments, the mounting bracket 504 is disposed on the inner surface of the fan cover 104, and a side surface of the mounting bracket 504 close to the fan assembly 200 is inclined relative to the vertical direction, and an upper end of a side surface of the mounting bracket 504 close to the fan assembly 200 is closer to the fan assembly 200 than a lower end.

[0146] The side surface of the mounting bracket 504 close to the fan assembly 200 has an inclination angle in the vertical direction greater than or equal to 3° and less than 90°.

[0147] On this basis, see Fig.11 , Fig.11The direction indicated by the arrow is a schematic diagram of a direction of air flow extracted by the range hood under the action of the fan assembly 200. It can be understood that the air can be purified by the formaldehyde removal active component 300 and the oil net 400 when entering the hood 100, and the treated gas flows into the accommodating chamber 101, is further processed by the purification assembly 500, and is finally discharged. Among them, the noise reduction part 502 of the purification assembly 500 can reduce the noise generated by the fan assembly 200 during operation, and the formaldehyde removal part 501 of the purification assembly 500 can further purify the air in the accommodating chamber 101.

[0148] Furthermore, under the heating effect of the electric heating film 700, the air flow rate in the hood 100 can be improved. At the same time, the temperature of the formaldehyde removal active component 300 and the formaldehyde removal part 501 of the purification component 500 will also increase, so that the active ingredients of the two can rise with the increase in temperature, thereby further enhancing the air purification ability of the range hood.

[0149] In some embodiments, see Fig.12 The range hood in the present application further includes a formaldehyde sensor 800 connected to the hood 100 for detecting the formaldehyde concentration in the air.

[0150] For example, see Fig.12 The formaldehyde sensor 800 is disposed on the outer shell of the smoke collecting hood 105. It is understandable that the formaldehyde sensor 800 can also be disposed on the surface of the fan hood 104, and the present application does not limit this.

[0151] Specifically, the formaldehyde sensor 800 usually contains a specific chemical adsorbent or catalyst. When the formaldehyde gas in the air contacts these chemicals, a specific chemical reaction occurs to generate electrical signals. By measuring the changes in these electrical signals, the formaldehyde sensor 800 can accurately detect the formaldehyde concentration in the air.

[0152] It should be noted that the formaldehyde sensor 800 includes multiple sensing ends, which can be arranged at the air inlet 102, in the accommodating cavity 101, or on the outer surface of the hood 100, which is not limited in the present application.

[0153] In some embodiments, see Figure 2 The range hood 100 of the range hood in the present application also forms an air outlet 103 connecting the accommodating cavity 101 with the outside of the range hood. The range hood also includes an air outlet hood valve plate 600, which is arranged at the air outlet 103 and connected to the range hood 100. The vent can be opened or closed by adjusting the position of the air outlet hood valve plate 600.

[0154] Specifically, when the air outlet hood valve plate 600 opens the air outlet 103, the accommodating chamber 101 is connected to the outside through the air outlet 103, and the range hood can discharge air to the outside. When the air outlet hood valve plate 600 closes the air outlet 103, the air outlet 103 is separated from the outside by the air outlet hood valve plate 600, and the range hood cannot discharge air to the outside through the air outlet 103.

[0155] In some embodiments, the range hood in the present application includes a driving device 900, which is connected to the hood 100 and the air outlet hood, and is used to drive the air outlet hood valve plate 600 to move away from or close to the air outlet 103 to open or close the air outlet 103. Therefore, the user only needs to control the driving device 900 to control the movement of the air outlet hood valve plate 600.

[0156] It should be noted that the air outlet hood valve plate 600 may move in a rotating or sliding manner, and this application does not limit this.

[0157] For example, see Fig.13 The driving device 900 includes a motor 901 , which is disposed in the accommodating cavity 101 , and an output end of the motor 901 is connected to a cam 902 , so that the motor 901 can control the rotation of the cam 902 .

[0158] The driving device 900 also includes a moving rod 903, which is arranged in the first accommodating chamber 1011. One end of the moving rod 903 forms a groove 9031, and the cam 902 can be inserted into the inside of the groove 9031. When the cam 902 rotates, the peripheral wall of the cam 902 slides relative to the groove 9031, and the other end of the moving rod 903 is connected to the air outlet hood valve plate 600.

[0159] Exemplarily, the cam 902 is conical or elliptical, which is not limited in the present application.

[0160] Specifically, when the cam 902 rotates, the groove 9031 of the moving rod 903 slides along the side wall of the cam 902. During the rotation of the cam 902, the wall surface where the cam 902 and the groove 9031 abut against each other keeps changing, so that the cam 902 can push the moving rod 903 to move up and down in the vertical direction. In this way, during the lifting and lowering of the moving rod 903, the moving rod 903 can drive the air outlet hood valve plate 600 to move in a direction close to or away from the air outlet 103, so that the air outlet hood valve plate 600 can close or open the air outlet 103.

[0161] Exemplarily, the driving device 900 can also be an electric telescopic rod, the output end of which is connected to the air outlet hood valve plate 600. The electric telescopic rod can drive the air outlet hood valve plate 600 to move in a direction close to or away from the air outlet 103, so that the air outlet hood valve plate 600 can close or open the air outlet 103.

[0162] In some embodiments, the range hood in the present application includes a reminder device connected to the hood 100. The range hood can send reminder information to the user through the reminder device so that the user can directly obtain the required information, thereby improving the user's usage experience.

[0163] It should be noted that the reminder device can be an alarm or a control panel, and this application does not limit this.

[0164] In some embodiments, the range hood in the present application further includes a controller for processing signals, and the controller is used to control the operation of various components inside the range hood so that the various components of the range hood operate to realize various predetermined functions of the range hood.

[0165] The controller refers to a device that can generate an operation control signal according to the instruction operation code and the timing signal, and instruct the corresponding component to execute the control instruction. Exemplarily, the controller can be at least one or a combination of a central processing unit (CPU), a general-purpose processor network processor (NP), a digital signal processor (DSP), a programmable logic device (PLD), a microprocessor, and a microcontroller. The controller can also be other devices with processing functions, such as circuits, devices, or software modules, and the embodiments of the present application do not impose any restrictions on this.

[0166] In some embodiments, the controller may be a microcontroller unit (MCU). MCU, also known as a single chip microcomputer or single chip microcomputer, is a chip that appropriately reduces the frequency and specifications of a central processing unit (CPU), and integrates peripheral interfaces such as memory, timer, USB, A / D conversion, UART, PLC, DMA, and even LCD drive circuits on a single chip to form a chip-level computer, which performs different combination controls for different application scenarios.

[0167] In some embodiments, see Fig.14In this application, the controller is electrically connected to the cleaning component and the formaldehyde sensor 800, and the controller is configured to: obtain the actual value of the formaldehyde concentration detected by the formaldehyde sensor 800, if the actual value is greater than the first preset value, control the cleaning component to start; if the actual value is less than the first preset value, the controller does not respond.

[0168] On this basis, when the actual value of the formaldehyde concentration is greater than the first preset value, the controller directly controls the cleaning component to start automatically, so that the heat generated by the cleaning component is transferred to the formaldehyde removal active component 300, so as to improve the activity of the formaldehyde removal active component 300, thereby improving the formaldehyde removal effect and efficiency of the range hood.

[0169] In some embodiments, see Fig.15 In the present application, the controller is electrically connected to the fan assembly 200, and the controller is also configured to: obtain the actual value of the formaldehyde concentration detected by the formaldehyde sensor 800, if the actual value is greater than the first preset value, control the fan assembly 200 to operate at the first preset power; if the actual value is less than the first preset value, the controller does not respond.

[0170] On this basis, when the actual value of the formaldehyde concentration is greater than the first preset value, the controller directly controls the fan assembly 200 to start automatically. When the fan assembly 200 is working, the range hood can absorb more indoor air, so that more indoor air flows through the formaldehyde removal active component 300, thereby allowing the formaldehyde removal active component 300 to purify more indoor air.

[0171] In some embodiments, see Fig.16 In the present application, after the controller controls the fan component 200 to operate at a first preset power, the controller is also configured to: obtain the operating time of the fan component 200 at the first preset power; if the operating time is greater than the first preset time, control the fan component 200 to operate at a second preset power, and the second preset power is less than the first preset power; if the operating time is less than the first preset time, the controller controls the fan component to continue to operate at the first preset power.

[0172] On this basis, after the reaction time of the formaldehyde removal active agent with formaldehyde in the air reaches the first preset time, the gas inside the range hood has reached a certain value. At this time, the fan assembly 200 no longer runs at a higher power. The controller controls the fan assembly 200 to adjust to the second preset power, thereby reducing the exhaust speed of the range hood.

[0173] In some embodiments, the controller in the present application is electrically connected to the drive device 900. Before the controller controls the fan assembly 200 to operate at a first preset power, the controller is also configured to: control the drive device 900 to drive the air outlet hood valve plate 600 to move in a direction close to the air outlet 103 to close the air outlet 103.

[0174] It can be understood that before the controller controls the fan assembly 200 to operate at the first preset power, the controller drives the air outlet hood valve plate 600 to close the air outlet 103 by controlling the driving device 900 to close the accommodating chamber 101, so that the air inhaled into the accommodating chamber 101 will gather in the accommodating chamber 101, so that the air in the accommodating chamber 101 can fully react with the formaldehyde removal active component 300 to achieve a higher air purification rate.

[0175] In some embodiments, in the present application, after the controller controls the fan assembly 200 to operate at a first preset power, the controller is also configured to: control the driving device 900 to drive the air outlet hood valve plate 600 to move according to a preset cycle, and within a preset cycle, the air outlet hood valve plate 600 opens the air outlet 103 for a second preset time period, and closes the air outlet 103 for a third preset time period.

[0176] On this basis, after the reaction time of the formaldehyde removal active agent with formaldehyde in the air reaches the second preset time, the formaldehyde accumulated in the air in the accommodating chamber 101 during the second preset time can fully react with the formaldehyde removal active component 300, so that the air is relatively fully purified. Therefore, it is necessary to drive the air outlet hood valve 600 to open the air outlet 103 for the third preset time to discharge the purified air to the outside in time, so that the range hood can absorb air with high formaldehyde content again and purify the air with high formaldehyde content.

[0177] The second preset time length may be 5 minutes, 6 minutes, 7 minutes, 8 minutes, etc. The third preset time length may be 5 minutes, 6 minutes, 7 minutes, 8 minutes, etc. The second preset time length may be equal to the third preset time length, or may be different from the third preset time length.

[0178] In the following, some embodiments of the present invention are schematically described by taking the reminder device as a control panel as an example.

[0179] In some embodiments, see Fig.17 In this application, the controller is electrically connected to the reminder device, and the controller is also configured to: obtain the actual value of the formaldehyde concentration detected by the formaldehyde sensor 800, control the reminder device to start, and the reminder device displays the actual value; if the actual value is greater than the first preset value, control the reminder device to send a reminder message.

[0180] On this basis, the controller can transmit the actual value measured by the formaldehyde sensor 800 to the control panel, and the user can learn the actual value of the formaldehyde concentration from the control panel. When the formaldehyde concentration is lower than the first preset value, the user can judge whether to turn on the fan assembly 200 and the cleaning assembly based on the actual value of the formaldehyde concentration to speed up the air flow rate and enhance the activity of the formaldehyde removal active component 300, thereby improving the air purification rate of the range hood.

[0181] Further, see Fig.17 , the controller is further configured to: obtain the actual value of the formaldehyde concentration detected by the formaldehyde sensor 800, control the reminder device to start, and the reminder device displays the actual value;

[0182] If the actual value is greater than the first preset value, the control reminder device sends a first reminder message;

[0183] If the actual value is less than the first preset value and greater than the second preset value, the reminder device is controlled to issue a second reminder message, wherein the second preset value is less than the first preset value;

[0184] If the actual value is smaller than the second preset value and larger than the third preset value, the reminder device is controlled to issue a third reminder message, wherein the third preset value is smaller than the second preset value.

[0185] On this basis, by setting multiple preset values, the range hood can send different information to the user when the actual formaldehyde concentration is in different ranges. The user does not need to judge by himself whether the actual value will affect the user's continued indoor environment, so that the user can accurately judge the actual formaldehyde concentration, thereby improving the user experience.

[0186] The reminder information sent by the reminder device may be a flashing light or a sound emitted by an alarm, and this application does not limit this.

[0187] It should be noted that the specific values ​​of the first preset value, the second preset value and the third preset value can be set by the user, and this application does not limit this.

[0188] The following uses a flashing light as an example to schematically illustrate some embodiments of the present invention.

[0189] In some embodiments, the first reminder message is a red flashing light, the second reminder message is a yellow flashing light, and the third reminder message is a green flashing light.

[0190] It should be noted that the flashing light color corresponding to different reminder messages can be set by the user, and this application does not limit this.

[0191] In a second aspect, the present application also provides a method for controlling a range hood.

[0192] In some embodiments, see Fig.18 , the control method provided in this application comprises the following steps:

[0193] S100 : The controller obtains the actual value of the formaldehyde concentration detected by the formaldehyde sensor 800 .

[0194] S300: The controller determines the relationship between the actual value and the first preset value. If the actual value is greater than the first preset value, the controller controls the cleaning component to start.

[0195] During the daily formaldehyde removal process of the range hood, the formaldehyde removal ability of the formaldehyde removal active component 300 will decrease with the increase of usage time, and the air purification ability will also decrease. The range hood in this application can detect the formaldehyde concentration around the range hood in real time or at regular intervals through the formaldehyde sensor 800.

[0196] When the formaldehyde sensor 800 senses that the actual value of the formaldehyde concentration is greater than the first preset value, the controller can control the cleaning component to work, and the heat generated by the cleaning component when cleaning the fan can be transferred to the formaldehyde removal active component 300, so that the temperature of the formaldehyde removal active component increases and the activity is enhanced, thereby increasing the formaldehyde removal ability of the formaldehyde removal active component 300. Therefore, the present application solves the technical problem that the formaldehyde removal effect of the range hood will gradually weaken over time.

[0197] In some embodiments, see Fig.19 , the control method provided in this application also includes the following steps:

[0198] S100 : The controller obtains the actual value of the formaldehyde concentration detected by the formaldehyde sensor 800 .

[0199] S200: The controller controls the reminder device to start, and the reminder device displays the actual value.

[0200] S300: The controller determines the relationship between the actual value and the first preset value. If the actual value is greater than the first preset value, the controller controls the cleaning component to start.

[0201] S400 , the controller controls the driving device 900 to drive the air outlet cover valve plate 600 to move toward the air outlet 103 to close the air outlet 103 .

[0202] S500 , the controller controls the fan assembly 200 to operate at a first preset power.

[0203] S600. After the controller controls the fan assembly 200 to operate at a first preset power, the controller obtains the operating time of the fan assembly 200 at the first preset power. If the operating time is greater than the first preset time, the controller controls the fan assembly 200 to operate at a second preset power.

[0204] It should be noted that the second preset power is less than the first preset power.

[0205] S700: The controller controls the driving device 900 to drive the air outlet hood valve plate 600 to move according to a preset cycle.

[0206] Through the above-mentioned settings, the range hood in the present application can realize the automation of the formaldehyde removal function, and start the formaldehyde removal work by continuously circulating so that pollutants such as formaldehyde in the room can be eliminated in time, thereby improving the air purification function of the range hood.

[0207] In some embodiments, see Fig.17 , the above step S300 includes the following steps:

[0208] S301, the controller determines the relationship between the actual value and the first preset value. If the actual value is greater than the first preset value, the controller controls the reminder device to send a first reminder message.

[0209] S302: If the actual value is less than the first preset value and greater than the second preset value, the controller controls the reminder device to send a second reminder message, wherein the second preset value is less than the first preset value.

[0210] S303: If the actual value is less than the second preset value and greater than the third preset value, the controller controls the reminder device to issue a third reminder message, wherein the third preset value is less than the second preset value.

[0211] Through the above settings, the controller in the present application can control the reminder device to issue different reminders according to different actual values ​​detected by the formaldehyde sensor 800, so that the user can feel the formaldehyde concentration in the room more intuitively, further improving the user's usage experience.

[0212] In some embodiments, the above step S700 includes the following steps:

[0213] In a preset period, the controller controls the driving device 900 to drive the air outlet cover valve plate 600 to open the air outlet 103 for a second preset time period. The controller controls the driving device 900 to drive the air outlet cover valve plate 600 to close the air outlet 103 for a third preset time period.

[0214] Through the above-mentioned settings, the exhaust function of the range hood in the present application can perform periodic work when the formaldehyde removal work is in progress, thereby making the entire formaldehyde removal work more intelligent.

[0215] In some embodiments, see Fig. 20 When the range hood is not equipped with a smoke duct, the control method in the present application further includes:

[0216] S100: The controller obtains the actual value of the formaldehyde concentration detected by the formaldehyde sensor.

[0217] After detecting the actual value, the controller determines the relationship between the actual value and the fourth preset value according to the actual value.

[0218] S800: If the actual value is less than the fourth preset value, the controller controls the fan assembly 200 to turn off, and the reminder device sends a reminder message for installing a smoke pipe.

[0219] The fourth preset value is smaller than the third preset value.

[0220] Through the above settings, the above control method in the present application is applicable to the daily operation of the range hood, and is also applicable to the formaldehyde removal work in new indoor houses, that is, when the range hood is not equipped with a smoke duct, the accommodating chamber 101 of the range hood is connected to the indoor environment through the air outlet 103, and at this time the range hood can perform formaldehyde removal work alone.

[0221] Please refer to the above description for details and will not be repeated here.

[0222] Although the present application has been described in conjunction with specific features and embodiments thereof, it is obvious that various modifications and combinations may be made thereto without departing from the spirit and scope of the present application. Accordingly, this specification and the drawings are merely exemplary illustrations of the present application as defined by the appended claims, and are deemed to have covered any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

[0223] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A range hood, characterized in that: include: A hood, forming a receiving cavity and an air inlet connecting the receiving cavity and the outside of the range hood; A fan assembly is disposed in the accommodating cavity and connected to the hood for extracting and exhausting air; A purification component is disposed in the accommodating chamber and connected to the hood, and the purification component includes a noise reduction part and a formaldehyde removal part, and the air exhausted by the fan component can pass through the noise reduction part and the formaldehyde removal part; The formaldehyde removal unit is active and can purify the air, and the noise reduction unit is used to reduce noise.

2. The range hood according to claim 1, characterized in that: The purification component includes a substrate, a plurality of noise reduction holes are formed on the surface of the substrate, and the plurality of noise reduction holes form the noise reduction part; The substrate includes at least one of an activated carbon plate or an activated manganese plate to form the formaldehyde removal portion.

3. The range hood according to claim 1, characterized in that: The purification component comprises: A substrate, a plurality of noise reduction holes are formed on the surface of the substrate, and the plurality of noise reduction holes form the noise reduction portion; A formaldehyde removal activator includes at least one of activated manganese and activated carbon. The formaldehyde removal activator is sprayed on the substrate to form the formaldehyde removal portion.

4. The range hood according to claim 1, characterized in that: The purification component comprises: A substrate, a plurality of noise reduction holes are formed on the surface of the substrate, and the plurality of noise reduction holes form the noise reduction portion; An active filter element is connected to the substrate to form the formaldehyde removal section, and the active filter element includes at least one of an activated carbon filter element and an active manganese filter element.

5. The range hood according to claim 4, characterized in that: The active filter element includes a plurality of filter elements, one filter element corresponds to one noise reduction hole and is fixed in the noise reduction hole.

6. The range hood according to claim 4, characterized in that: The active filter element comprises an active filter screen, which is connected to the substrate and is located on one side of the substrate along the thickness direction of the substrate.

7. The range hood according to claim 6, characterized in that: The active filter element comprises an activated carbon filter and an activated manganese filter, wherein along the thickness direction of the substrate, the activated manganese filter is connected to one side surface of the substrate, and the activated manganese filter is connected to one side surface of the activated manganese filter away from the substrate.

8. The range hood according to any one of claims 2 to 7, characterized in that: Also includes: A cleaning component is arranged in the accommodating cavity and can clean the surface of the fan component by heating. The heat generated by the cleaning component can be transferred to the formaldehyde removal part.

9. The range hood according to claim 8, characterized in that: The cleaning component comprises: An electric heating film, which covers the surface of the fan assembly and is used to clean the fan assembly; and / or, A steam generator is connected to the hood, and the steam generator is provided with a steam outlet, and the steam outlet faces the fan assembly.

10. A range hood, characterized in that: The range hood comprises a fan cover and a fume collecting cover, wherein the fan cover forms a first accommodating cavity and an air outlet connecting the first accommodating cavity with the outside of the range hood, the fume collecting cover forms a second accommodating cavity and an air inlet connecting the second accommodating cavity with the outside of the range hood, and the first accommodating cavity is connected with the second accommodating cavity; A fan assembly is disposed in the first accommodating chamber and connected to the fan cover for exhausting air; A purification component is disposed in the accommodating chamber and connected to the fan cover, and the purification component includes a noise reduction part and a formaldehyde removal part, and the air exhausted by the fan component can pass through the noise reduction part and the formaldehyde removal part; The formaldehyde removal unit is used for purifying air, and the noise reduction unit is used for reducing noise.

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