Range hood

Abstract

The embodiment of the utility model belongs to the technical field of kitchen appliances, and provides a range hood. The range hood comprises a machine body, a fan assembly, a detection piece, a switching piece, a gas injection piece and a control piece. The first exhaust outlet of the machine body is used for communicating the accommodating cavity of the machine body with outdoors; the second exhaust outlet of the machine body communicates with the containing cavity and the indoor space. A circulating air duct is formed in the volute; a first air duct of the circulating air duct is used for communicating the volute air inlet with the first exhaust outlet; the second air duct of the circulating air duct is used for communicating the volute air inlet with the second exhaust outlet; the detection piece is used for detecting the particulate matter concentration of oil smoke in the circulating air duct. And the switching piece selectively communicates the second air duct with the volute air inlet. And the gas injection piece communicates with the circulating air duct. According to the extractor hood provided by the embodiment of the invention, the oil fume is controlled to be discharged indoors or outdoors according to the particulate matter concentration, and when the oil fume is discharged indoors by the extractor hood, the gas injection part injects air to dilute the oil fume in the circulating air duct, so that the purification capacity of the extractor hood is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of kitchen appliances, and in particular to a range hood. BACKGROUND

[0002] The range hood is an electrical appliance installed in the kitchen.

[0003] In the related art, the range hood includes an inner circulation mode and an outer circulation mode. In the outer circulation mode, the range hood sucks the oil fume, odor and hot air in the kitchen through the fan and directly discharges them to the outside through the exhaust duct. In the inner circulation mode, the range hood sucks the oil fume through the fan, purifies it through the internal filtering system (usually including a grease filter and an activated carbon filter), and then discharges the purified air back to the kitchen.

[0004] However, the existing range hood has poor air purification capacity in the inner circulation mode. INVENTION CONTENTS

[0005] The range hood provided by the embodiments of the present application dilutes the concentration of the oil fume by injecting air flow into the circulating air duct through the air injection member when the range hood discharges the oil fume to the indoor, reduces the concentration of the oil fume discharged to the indoor, and improves the purification capacity of the range hood.

[0006] The range hood provided by the embodiments of the present application includes a machine body, a fan assembly, a detection member, a switching member, an air injection member and a control member.

[0007] The machine body forms a containing cavity. The machine body has a first exhaust outlet and a second exhaust outlet. The first exhaust outlet is used to communicate the containing cavity and the outdoor; and the second exhaust outlet is used to communicate the containing cavity and the indoor.

[0008] The fan assembly includes a volute, the volute has a volute air inlet, and the volute forms a circulating air duct; the circulating air duct includes a first air duct and a second air duct. The first air duct is used to communicate the volute air inlet and the first exhaust outlet; and the second air duct is used to communicate the volute air inlet and the second exhaust outlet.

[0009] The detection member is located in the circulating air duct, and is used to detect the particulate matter concentration of the oil fume in the circulating air duct.

[0010] The switching member selectively communicates the second air duct and the volute air inlet.

[0011] The air injection member communicates with the circulating air duct.

[0012] The fan assembly, the detection member, the air injection member and the switching member are electrically connected with the control member; the control member is configured to control the switching member according to the detection result of the detection member, so as to make the second air duct communicate with the volute air inlet, and control the air injection member to work according to the detection result of the detection member.

[0013] The above technical solution has the following advantages or beneficial effects: The range hood provided by the embodiments of the present application has a detection member for detecting the concentration of particulate matter of the oil fume in the circulating air duct to form a detection result. A control member is used to analyze the detection result of the detection member to determine the concentration of particulate matter of the oil fume in the range hood. According to the data of the detection member, the control member can adjust the working mode of the range hood. When the concentration of the oil fume is higher than the preset concentration, the control member controls the switching member to make the second air duct and the volute inlet not communicate. In this way, the oil fume sucked by the range hood can only be discharged to the outdoor through the volute inlet, the first air duct and the first exhaust port, avoiding the high-concentration oil fume entering the indoor. When the concentration of the oil fume is lower than the preset concentration, the control member controls the switching member to make the second air duct and the volute inlet communicate. In this way, the oil fume sucked by the range hood is discharged to the indoor through the volute inlet, the second air duct and the second exhaust port. In this way, the range hood only discharges the oil fume with low concentration to the indoor, avoiding the influence of high-concentration oil fume on the indoor environment.

[0014] By automatically adjusting the discharge mode of the oil fume by the control member, the range hood can maintain high-efficiency operation under different cooking conditions and reduce energy consumption. At the same time, the user does not need to manually adjust the range hood, and the range hood can adjust the discharge mode according to the actual needs, improving the intelligent level of the range hood.

[0015] Further, the range hood provided by the embodiments of the present application injects gas into the circulating air duct through the gas injection member. In this way, the concentration of oil fume particles in the circulating air duct can be reduced, which helps to improve the quality of the discharged air and improve the purification capacity of the range hood. When the range hood discharges the airflow with oil fume to the indoor, the gas injected by the gas injection member into the circulating air duct effectively dilutes the oil fume, reduces the time of the user exposed to high-concentration oil fume, and reduces the influence of oil fume on the health of the user.

[0016] In some embodiments of the present application, the air duct further includes a main air duct, one end of the main air duct communicates with the volute inlet, and the other end of the main air duct communicates with the first air duct and the second air duct.

[0017] The gas injection member communicates with the second air duct, or the gas injection member communicates with the main air duct.

[0018] The above technical solution has the following advantages or beneficial effects: When the gas injection member communicates with the main air duct, the gas injection member injects gas into the main air duct. In this way, whether the oil fume is discharged to the outdoor through the first air duct and the first exhaust port or discharged to the indoor through the second air duct and the second exhaust port, the oil fume is diluted, the concentration of particulate matter in the unit volume of the oil fume is reduced, the influence of the oil fume on the air quality is reduced, and the purification capacity of the range hood is improved.

[0019] When the gas injection member and the second air duct are in communication, the gas injection member injects gas into the second air duct, so that the oil fume discharged through the second air duct and the second air outlet into the room is diluted, the concentration of particulate matters in the unit volume of the oil fume is reduced, the influence of the oil fume on the indoor air quality is reduced, and the purification capacity of the range hood in the internal circulation mode is improved.

[0020] In some embodiments of the present application, the disinfection assembly is configured to disinfect the second air duct; and the disinfection assembly and the control member are electrically connected.

[0021] The control member is configured to control the switching member to make the second air duct communicate with the volute inlet according to the detection result of the detection member, and control the gas injection member to work and control the disinfection assembly to work according to the detection result of the detection member.

[0022] The above technical solution has the following advantages or beneficial effects: the detection member continuously detects the concentration of particulate matters in the range hood and transmits the detection result to the control member. When the concentration of particulate matters is less than the preset concentration, the control member controls the switching member to make the second air duct and the volute inlet communicate, so that the oil fume sucked by the range hood is discharged into the room through the volute inlet, the second air duct and the second air outlet, at the same time, the disinfection assembly disinfects the second air duct, so that the range hood only discharges the oil fume with low concentration into the room, reduces the bacteria carried by the oil fume discharged into the room, and improves the purification capacity of the range hood.

[0023] In some embodiments of the present application, the disinfection assembly communicates with the second air duct through a disinfection pipeline, and an output end of the disinfection pipeline is arranged on one side of the second air duct close to the volute inlet.

[0024] The above technical solution has the following advantages or beneficial effects: in the process of discharging the oil fume into the room through the volute inlet, the second air duct and the second air outlet, the disinfection assembly can disinfect and sterilize the circulating air duct, so that the microorganisms in the oil fume discharged into the room are effectively killed, the indoor air hygiene level is improved, and the purification capacity of the range hood is further improved. By arranging the output end of the disinfection pipeline on one side of the second air duct close to the volute inlet, it is ensured that the disinfection assembly generates disinfectant to effectively enter the second air duct, and the disinfection capacity is improved.

[0025] In some embodiments of the present application, the disinfection assembly includes an ozone generator, the ozone generator communicates with the gas injection member through a first connecting pipeline, and the gas injection member communicates with the second air duct through a second connecting pipeline.

[0026] The above technical solution has the following advantages or beneficial effects: after the ozone generator is started, the generated ozone is transported to the gas injection member through the first connecting pipe. The gas injection member injects ozone and air into the second air duct, and realizes communication with the air duct through the second connecting pipe. Ozone is a strong oxidizing agent that can effectively kill bacteria, viruses and mold in the air. Injecting ozone into the second air duct and using ozone to sterilize the second air duct can help improve the hygiene level of the air. The design of the gas injection member injecting gas in the second air duct ensures uniform distribution of ozone in the second air duct, enhancing the disinfection effect.

[0027] In some embodiments of the present application, the sterilization assembly includes an ion sterilization member, the ion sterilization member is communicated with the gas injection member through the first connecting pipe, and the gas injection member is communicated with the second air duct through the second connecting pipe.

[0028] The above technical solution has the following advantages or beneficial effects: after the ion sterilization member is started, the generated ions are transported to the gas injection member through the first connecting pipe. The gas injection member injects ions into the second air duct, and realizes communication with the air duct through the second connecting pipe. Ion technology can quickly and effectively kill a variety of microorganisms, improving the hygiene level of the air. Ion sterilization is a physical method that does not leave chemical residues in the air, which is safe and environmentally friendly.

[0029] In some embodiments of the present application, the range hood further comprises a filter member, the body has an air inlet, and the air inlet is communicated with the volute air inlet; the air inlet is provided with the filter member.

[0030] The above technical solution has the following advantages or beneficial effects: the filter member can be a metal filter screen, which captures larger grease particles through physical blocking and inertial separation to prevent them from clogging the circulating air duct.

[0031] During use of the range hood, the oil fume generated by the user during cooking is sucked into the range hood through the air inlet. The air first passes through the filter member, which captures and condenses larger grease particles on the filter member. The filtered air passes through the volute and the circulating air duct and is discharged outdoors or indoors.

[0032] In some embodiments of the present application, the detection member includes an optical particulate sensor and a charge sensor.

[0033] And / or, the gas injection member includes an air pump.

[0034] The above technical solution has the following advantages or beneficial effects: the optical particulate sensor includes a laser scattering sensor and an infrared scattering sensor.

[0035] The laser scattering sensor uses a laser light source. When the particulate matter in the air passes through the detection member, the particulate matter will scatter the laser light. The detection member calculates the concentration and size of the particulate matter by detecting the intensity and pattern of the scattered light.

[0036] Infrared scattering sensors use infrared LEDs as light sources. Infrared light has a longer wavelength and can penetrate a certain concentration of particulate matter. When the particulate matter in the air passes through the detection area of the sensor, the infrared light will be scattered by the particulate matter. The scattered light will deviate from the original light path in different directions.

[0037] Infrared scattering sensors are equipped with photodetectors inside to detect the intensity of scattered light. According to the intensity and pattern of scattered light, the sensor can infer the concentration of particulate matter.

[0038] Charge sensors include charge induction sensors. Charge induction sensors measure the concentration of particulate matter by sensing the electric charge it carries in an electric field.

[0039] An air pump is a device used to move air or other gases, capable of generating airflow and pressure. Air pumps move air from one place to another through mechanical movement. Its basic working principle is to use the power generated by the motor or manual operation to compress or push the air.

[0040] In some embodiments of the present application, the switching member has a first working state and a second working state.

[0041] The control member is configured to control the working state of the switching member according to the detection result of the detection member;

[0042] When the switching member is in the first working state, the second air duct and the volute inlet are not connected;

[0043] When the switching member is in the second working state, the second air duct connects the volute inlet and the second exhaust outlet.

[0044] The above technical solution has the following advantages or beneficial effects: when the switching member is in the first working state, the passage between the second air duct and the volute inlet is blocked, and the airflow sucked by the range hood cannot enter the indoor through the second air duct and the second exhaust outlet.

[0045] When the switching member is in the second working state, the passage between the second air duct and the volute inlet is connected, and the gas sucked by the range hood enters the indoor through the second air duct and the second exhaust outlet.

[0046] By setting the switching member to have a first working state and a second working state, the range hood has different circulation paths when discharging oil fumes, wherein the control member is used to control the working state of the switching member according to the detection result of the detection member, the user does not need to manually adjust the range hood, the range hood can adjust the discharge mode according to the actual needs, and the intelligent level of the range hood is improved.

[0047] In some embodiments of the present application, the switching member includes a driving part and a rotating part; the rotating part is rotatably connected to the inner periphery of the circulating air duct.

[0048] The driving part is configured to drive the rotating part to rotate so as to block the second air duct, thereby forming the first working state of the switching part; or the driving part is configured to drive the rotating part to rotate so as to open the second air duct, thereby forming the second working state of the switching part.

[0049] The above technical solution has the following advantages or beneficial effects: the driving part is the power source of the switching part, and is responsible for providing power for rotating the rotating part. The driving part can be an electric motor, a pneumatic device or a hydraulic device.

[0050] The rotating part is the core component of the switching part, and can be a baffle. The rotating part is rotationally connected to the inner periphery of the circulating air duct, and can rotate under the action of the driving part, thereby changing the flow path of the oil fume sucked by the range hood. After the control part obtains the detection result of the detection part, when the detection result shows that the concentration of particulate matter is less than the preset concentration, the driving part is controlled to operate, and the driving part drives the rotating part to rotate. In this way, the second air duct is connected to the second exhaust port, and the air flow entering the circulating air duct can be discharged to the indoor through the second air duct and the second exhaust port. BRIEF DESCRIPTION OF DRAWINGS

[0051] In order to more clearly illustrate the embodiments of the present application or the implementation manners in the related art, the drawings needed to be used in the embodiments or related art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0052] Figure 1 Structure diagram of the range hood provided by the embodiment of the present application Figure One ;

[0053] Figure 2 Structure diagram of the range hood provided by the embodiment of the present application Figure Two ;

[0054] Figure 3 Structure diagram of the range hood provided by the embodiment of the present application Figure Three ;

[0055] Figure 4 Structure diagram of the range hood provided by the embodiment of the present application Figure Four ;

[0056] Figure 5 Structure diagram of the range hood provided by the embodiment of the present application Figure Five ;

[0057] Figure 6 Structure diagram of the range hood provided by the embodiment of the present application

[0058] Figure 7 A structural schematic diagram of a range hood body and a volute provided for an embodiment of the present application is shown in FIG. 1.

[0059] Figure 8 A structural schematic diagram of a volute of a range hood provided for an embodiment of the present application is shown in FIG. 2. Figure One

[0060] A structural schematic diagram of a volute of a range hood provided for an embodiment of the present application is shown in FIG. 3. Figure 9 Figure Two A structural schematic diagram of a volute of a range hood provided for an embodiment of the present application is shown in FIG. 4.

[0061] A structural schematic diagram of a volute of a range hood provided for an embodiment of the present application is shown in FIG. 5. Figure 10 Figure Three A structural schematic diagram of a volute of a range hood provided for an embodiment of the present application is shown in FIG. 6.

[0062] Legend of reference signs:

[0063] 100: body; 110: accommodating cavity; 120: first air outlet; 130: second air outlet;

[0064] 200: volute; 210: volute air inlet; 220: first air duct; 230: second air duct; 240: main air duct;

[0065] 300: detection member;

[0066] 400: switching member;

[0067] 500: air injection member;

[0068] 600: sterilization assembly;

[0069] 700: filtering member;

[0070] 800: control member. DETAILED DESCRIPTION

[0071] In the related art, a range hood has designs of an inner circulation mode and an outer circulation mode, so that it can adapt to different kitchen environments and user needs. At present, the inner circulation mode or the outer circulation mode of the range hood can be selected by manually dialing a switch or by a touch screen.

[0072] However, the oil fume purification mode of the inner circulation mode and the outer circulation mode of the existing range hood is the same, that is, the oil fume concentration discharged by the range hood into the room when the range hood is in the inner circulation mode is consistent with the oil fume concentration discharged into the outdoor when the range hood is in the outer circulation mode. In this way, the oil fume concentration discharged by the range hood into the room is too large, which is not conducive to the purification of indoor air.

[0073] Therefore, the existing range hood has the problem of poor purification capacity in the inner circulation mode.

[0074] ​In view of this, the application provides an extractor hood, which comprises a body, a fan assembly, a detection member, a switching member, an air injection member and a control member. The body is formed with a receiving cavity. The body has a first air outlet and a second air outlet. The first air outlet is used for connecting the receiving cavity with the outdoor environment, and the second air outlet is used for connecting the receiving cavity with the indoor environment. The fan assembly comprises a volute, which has a volute air inlet and is formed with a circulating air duct. The circulating air duct comprises a first air duct and a second air duct. The first air duct is used for connecting the volute air inlet with the first air outlet, and the second air duct is used for connecting the volute air inlet with the second air outlet. The detection member is arranged in the circulating air duct and is used for detecting the concentration of particulate matters in the oil fume in the circulating air duct. The switching member is used for selectively connecting the second air duct with the volute air inlet. The air injection member is connected with the circulating air duct. The fan assembly, the detection member, the air injection member and the switching member are electrically connected with the control member. The control member is configured to control the switching member to connect the second air duct with the volute air inlet according to the detection result of the detection member, and control the air injection member to work according to the detection result of the detection member.

[0075] The extractor hood provided by the application is used for detecting the concentration of particulate matters in the oil fume in the circulating air duct to form a detection result. The control member analyzes the detection result of the detection member to determine the concentration of particulate matters in the oil fume in the extractor hood. When the concentration of the oil fume is lower than a preset concentration, the control member controls the switching member to connect the second air duct with the volute air inlet. In this way, the oil fume sucked by the extractor hood is discharged into the indoor environment through the volute air inlet, the second air duct and the second air outlet. Thus, the extractor hood only discharges the oil fume with a low concentration into the indoor environment, thereby avoiding the influence of the oil fume with a high concentration on the indoor environment.

[0076] By automatically adjusting the discharging mode of the oil fume by the control member, the extractor hood can maintain high-efficiency operation under different cooking conditions and reduce energy consumption. Meanwhile, the user does not need to manually adjust the extractor hood, and the extractor hood can adjust the discharging mode according to actual needs, thereby improving the intelligent level of the extractor hood.

[0077] Further, by arranging the air injection member, the air injection member injects gas into the circulating air duct, which can reduce the concentration of oil fume particles in the circulating air duct, help to improve the quality of the discharged air and improve the purification capacity of the extractor hood. When the extractor hood discharges the air flow into the indoor environment, the gas injected by the air injection member into the circulating air duct effectively dilutes the oil fume, reduces the time during which the user is exposed to the oil fume with a high concentration and reduces the influence of the oil fume on the health of the user.

[0078] To make the objectives, implementations and advantages of the application clearer, the following will clearly and completely describe the exemplary implementations of the application in combination with the accompanying drawings of the exemplary implementations of the application. Obviously, the described exemplary implementations are only a part of the implementations of the application, rather than all the implementations of the application.

[0079] It should be noted that the brief description of the terms in the present application is only for the convenience of understanding the subsequently described embodiments, and is not intended to limit the embodiments of the present application. Unless otherwise specified, these terms should be understood in accordance with their ordinary and general meanings.

[0080] In addition, the terms "comprising" and "having" and any variations thereof are intended to cover, but not exclusively, inclusion, for example, a product or device including a series of components does not have to be limited to the clearly listed components, but can include other components that are not clearly listed or inherent to these products or devices.

[0081] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0082] The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0083] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0084] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of protection of the present application.

[0085] The present application provides a range hood, referring to Figures 1 to 6As shown, the range hood includes a body 100, a fan assembly, a detection member 300, a switching member 400, a gas injection member 500, and a control member 800.

[0086] The body 100 is formed with a receiving cavity 110. The body 100 has a first air outlet 120 and a second air outlet 130. The first air outlet 120 is used to communicate the receiving cavity 110 and the outdoor; the first air outlet 120 is used to directly discharge the oil fume to the outdoor. The second air outlet 130 is used to communicate the receiving cavity 110 and the indoor. The second air outlet 130 is used to discharge the oil fume back to the indoor.

[0087] The fan assembly includes a volute 200, the volute 200 has a volute air inlet 210, the volute 200 is formed with a circulating air duct; the circulating air duct includes a first air duct 220 and a second air duct 230. The first air duct 220 is used to communicate the volute air inlet 210 and the first air outlet 120; the second air duct 230 is used to communicate the volute air inlet 210 and the second air outlet 130. The volute air inlet 210 is the inlet of the fan assembly, the volute air inlet 210 communicates with the first air duct 220 and the second air duct 230.

[0088] Referring to Figure 7 and Figure 8 As shown, the detection member 300 is located in the circulating air duct, and the detection member 300 is used to detect the concentration of particulate matter in the oil fume in the circulating air duct.

[0089] The switching member 400 can selectively communicate the second air duct 230 and the volute air inlet 210.

[0090] The gas injection member 500 communicates with the circulating air duct. The gas injection member 500 is used to inject gas into the circulating air duct. This gas can be treated clean air or inert gas.

[0091] When the gas is injected into the circulating air duct, the gas mixes with the oil fume, increasing the total volume of gas in the circulating air duct. This mixing effect reduces the concentration of particulate matter in the oil fume, as the proportion of oil fume particles relative to the total gas volume is reduced. The increased gas flow also helps to increase the airflow speed in the air duct. This enhanced airflow dynamics can help to direct the oil fume to the second air outlet 130 more quickly, reducing the residence time of the oil fume in the circulating air duct, and in turn avoiding the breeding of bacteria in the circulating air duct.

[0092] The fan assembly, the detection member 300, the gas injection member 500, and the switching member 400 are electrically connected with the control member 800; the control member 800 is configured to control the switching member 400 according to the detection result of the detection member 300, so that the second air duct 230 communicates with the volute air inlet 210, and control the gas injection member 500 to work according to the detection result of the detection member 300.

[0093] The oil fume extractor provided by the embodiment of the present application is provided with a detection member 300 for detecting the concentration of particulate matters of the oil fume in the circulating air duct to form a detection result. The control member 800 is used for analyzing the detection result of the detection member 300 to determine the concentration of particulate matters of the oil fume in the oil fume extractor. According to the data of the detection member 300, the control member 800 can adjust the working mode of the oil fume extractor. When the concentration of the oil fume is higher than the preset concentration, the control member 800 controls the switching member 400 to make the second air duct 230 and the volute air inlet 210 not communicate. In this way, the oil fume sucked by the oil fume extractor can only be discharged to the outdoor through the volute air inlet 210, the first air duct 220 and the first air outlet 120, avoiding the high-concentration oil fume from entering the indoor. When the concentration of the oil fume is lower than the preset concentration, the control member 800 controls the switching member 400 to make the second air duct 230 and the volute air inlet 210 communicate. In this way, the oil fume sucked by the oil fume extractor can be discharged to the indoor through the volute air inlet 210, the second air duct 230 and the second air outlet 130. In this way, the oil fume extractor only discharges the oil fume with low concentration to the indoor, avoiding the high-concentration oil fume from affecting the indoor environment.

[0094] By automatically adjusting the discharging mode of the oil fume by the control member 800, the oil fume extractor can maintain high-efficiency operation under different cooking conditions and reduce energy consumption. Meanwhile, the user does not need to manually adjust the oil fume extractor, and the oil fume extractor can adjust the discharging mode according to the actual needs, improving the intelligent level of the oil fume extractor.

[0095] The oil fume extractor adjusts the discharging mode of the oil fume by the detection of the detection member 300 and the control of the switching member 400 by the control member 800, ensuring the continuous optimization of the indoor air quality, reducing the influence of the oil fume on the health and improving the purification capacity of the oil fume extractor in the indoor discharging mode.

[0096] Further, the oil fume extractor provided by the embodiment of the present application is provided with the gas injection member 500. The gas injection member 500 injects gas into the circulating air duct, which can reduce the concentration of the oil fume particulate in the circulating air duct, helping to improve the quality of the discharged air and improve the purification capacity of the oil fume extractor. When the oil fume extractor discharges the airflow with the oil fume to the indoor, the gas injected by the gas injection member 500 into the circulating air duct effectively dilutes the oil fume, reducing the time of the user exposed to the high-concentration oil fume and reducing the influence of the oil fume on the health of the user.

[0097] In addition, the gas injected by the gas injection member 500 into the circulating air duct not only can reduce the concentration of the oil fume, but also can reduce the temperature of the oil fume, which reduces the abrasion and pollution of the internal components of the oil fume extractor by the oil fume and prolongs the service life of the oil fume extractor.

[0098] As an implementable embodiment, refer to Figure 9As shown, the air duct further comprises a main air duct 240, one end of the main air duct 240 being in communication with the volute air inlet 210, and the other end of the main air duct 240 being in communication with the first air duct 220 and the second air duct 230.

[0099] The gas injection member 500 is in communication with the second air duct 230, or the gas injection member 500 is in communication with the main air duct 240.

[0100] In some embodiments, the gas injection member 500 is in communication with the main air duct 240. The gas injection member 500 injects gas into the main air duct 240. In this way, whether the oil fume discharged through the first air duct 220 and the first air outlet 120 to the outdoor or the oil fume discharged through the second air duct 230 and the second air outlet 130 to the indoor, the oil fume is diluted, the concentration of particulate matters in the oil fume per unit volume is reduced, the influence of the oil fume on the air quality is reduced, and the purification capacity of the range hood is improved.

[0101] In other embodiments, the gas injection member 500 is in communication with the second air duct 230. The gas injection member 500 injects gas into the second air duct 230, so that the oil fume discharged through the second air duct 230 and the second air outlet 130 to the indoor is diluted, the concentration of particulate matters in the oil fume per unit volume is reduced, the influence of the oil fume on the indoor air quality is reduced, and the purification capacity of the range hood in the indoor circulation mode is improved.

[0102] As an implementable embodiment, referring to Figure 1 , Figure 4 and Figure 5 As shown, the range hood further comprises a disinfection assembly 600 for disinfecting the second air duct 230; the disinfection assembly 600 is electrically connected with the control member 800.

[0103] The control member 800 is configured to control the switching member 400 according to the detection result of the detection member 300 to make the second air duct 230 in communication with the volute air inlet 210, and control the gas injection member 500 to work and control the disinfection assembly 600 to work according to the detection result of the detection member 300.

[0104] The range hood will capture a large amount of oil fume when working, and the oil fume contains oil and food residues. The oil is easy to adhere to the range hood, and a nutrient-rich environment is formed in the circulating air duct, which is conducive to the breeding of microorganisms. In addition, during the cooking process of the range hood, water vapor and heat will increase the humidity and temperature of the air, and this high-temperature and high-humidity environment provides an ideal condition for the reproduction of bacteria, mold and other microorganisms. When the range hood discharges oil fume to the indoor, these microorganisms may also be transmitted to the indoor and enter the respiratory system of the user, affecting the health of the user. In addition, the decomposition of oil and food residues by microorganisms may produce odors, affecting the kitchen environment and the cooking experience of the user.

[0105] Therefore, the sterilization assembly 600 is arranged in the range hood, and the sterilization assembly 600 can sterilize the circulating air duct, so that the range hood can not only remove oil fume, but also effectively kill microorganisms in the circulating air duct, improve the indoor air hygiene level, and further improve the purification capacity of the range hood.

[0106] Exemplarily, the detection member 300 continuously detects the concentration of particulate matters in the range hood, and transmits the detection result to the control member 800. When the concentration of the particulate matters is less than the preset concentration, the control member 800 controls the switching member 400 to communicate the second air duct 230 and the volute air inlet 210, so that the oil fume sucked by the range hood is discharged into the room through the volute air inlet 210, the second air duct 230 and the second air outlet 130, and at the same time, the sterilization assembly 600 sterilizes the circulating air duct, so that the range hood only discharges the oil fume with low concentration into the room, reduces the bacteria carried by the oil fume discharged into the room, and improves the purification capacity of the range hood.

[0107] As an implementable embodiment, the sterilization assembly 600 communicates with the second air duct 230 through a sterilization pipeline, and an output end of the sterilization pipeline is arranged on one side of the second air duct 230 close to the volute air inlet 210.

[0108] Exemplarily, in the process of discharging the oil fume into the room through the volute air inlet 210, the second air duct 230 and the second air outlet 130, the sterilization assembly 600 can sterilize and disinfect the circulating air duct, effectively kill the microorganisms in the oil fume discharged into the room, improve the indoor air hygiene level, and further improve the purification capacity of the range hood.

[0109] As an implementable embodiment, the sterilization assembly 600 includes an ozone generator, the ozone generator communicates with the air injection member 500 through a first connecting pipe, and the air injection member 500 communicates with the second air duct 230 through a second connecting pipe.

[0110] Exemplarily, after the ozone generator is started, the generated ozone is transported to the air injection member 500 through the first connecting pipe. The air injection member 500 injects the ozone and air into the second air duct 230, and communicates with the air duct through the second connecting pipe.

[0111] Ozone is a strong oxidizing agent, which can effectively kill bacteria, viruses and mold in the air. By injecting ozone into the second air duct 230 and using ozone to disinfect the second air duct 230, the air hygiene level can be improved. Through the design of the air injection member 500 injecting air into the second air duct 230, the uniform distribution of ozone in the second air duct 230 is ensured, and the sterilization effect is enhanced.

[0112] It can be understood that, since the ozone with too high concentration may cause harm to human body, the ozone concentration in the range hood is lower than the safety standard.

[0113] The ozone concentration sensor is arranged in the circulating air duct of the range hood, and is used to detect the ozone concentration. The ozone concentration sensor is electrically connected with the control member 800. When the ozone concentration reaches a certain value, the control member 800 can control the sterilization assembly 600 to stop working, so as to avoid damage to the human body caused by ozone.

[0114] It can be understood that part of the ozone is consumed in the sterilization process.

[0115] As an implementable embodiment, the sterilization assembly 600 includes an ion sterilization member, which is communicated with the gas injection member 500 through the first connecting pipe, and the gas injection member 500 is communicated with the second air duct 230 through the second connecting pipe.

[0116] Exemplarily, after the ion sterilization member is started, the generated ions are transported to the gas injection member 500 through the first connecting pipe. The gas injection member 500 injects the ions into the second air duct 230, and realizes the communication with the air duct through the second connecting pipe. The ion technology can quickly and effectively kill a variety of microorganisms, and improve the hygiene level of the air. The ion sterilization is a physical method, and does not leave chemical residues in the air, which is safe and environmentally friendly.

[0117] Exemplarily, the ion sterilization member can be a negative ion generator, a corona discharge device, or a silver ion generator.

[0118] Exemplarily, the ions generated by the ion sterilization member include oxygen negative ions and peroxide ions. The oxygen negative ions can destroy the cell membrane and protein structure of bacteria and viruses through oxidation reaction, so as to inhibit the growth or cause the death of the bacteria and viruses.

[0119] The peroxide ions have strong oxidizing property, and can effectively destroy the cell structure of microorganisms.

[0120] The ions generated by the ion sterilization member include silver ions. The silver ions can combine with the protein and phospholipid on the cell membrane, destroy the integrity of the cell membrane, and cause the leakage of electrolytes, proteins, nucleic acids and the like in the cell, so as to kill the bacteria. The silver ions can combine with the protein in the bacterial cell, cause the denaturation and inactivation of the protein, and interfere with the normal metabolic function of the bacteria.

[0121] As an implementable embodiment, referring to Figure 3 The range hood further includes a filter member 700, and the body 100 has an air inlet, which is communicated with the volute air inlet 210. The air inlet is used to suck the oil fume generated in the cooking process.

[0122] The air inlet is provided with the filter member 700. The filter member 700 is installed at the air inlet, and is mainly used to capture and remove the oil, smoke and other particulate matters in the air.

[0123] Exemplarily, the filter 700 can be a metal mesh. The filter 700 traps larger grease particles by physical blocking and inertial separation, preventing them from circulating in the duct.

[0124] Exemplarily, during the use of the range hood, the oil fume generated by the user during cooking is sucked into the range hood through the air inlet. The air first passes through the filter 700, which traps and condenses larger grease particles on the filter 700. The filtered air passes through the volute 200, the circulating air duct, and is discharged outdoors or indoors.

[0125] As an implementable embodiment, the detection member 300 includes an optical particulate sensor and an electric charge sensor.

[0126] Exemplarily, the optical particulate sensor includes a laser scattering sensor and an infrared scattering sensor.

[0127] The laser scattering sensor uses a laser light source. When the particulate in the air passes through the detection member 300, the particulate will scatter the laser light. The detection member 300 calculates the concentration and size of the particulate by detecting the intensity and pattern of the scattered light.

[0128] The infrared scattering sensor uses an infrared LED as a light source. Infrared light has a longer wavelength and can penetrate a certain concentration of particulate. When the particulate in the air passes through the detection area of the sensor, the infrared light will be scattered by the particulate. The scattered light will deviate from the original light path in different directions. The infrared scattering sensor is equipped with a photodetector inside to detect the intensity of the scattered light. According to the intensity and pattern of the scattered light, the sensor can infer the concentration of the particulate.

[0129] The electric charge sensor includes a charge induction sensor. The charge induction sensor measures the concentration of the particulate by sensing the electric charge carried by the particulate in the electric field.

[0130] As an implementable embodiment, the air injection member 500 includes an air pump.

[0131] Exemplarily, the air pump is a device used to move air or other gases, capable of generating air flow and pressure. The air pump moves air from one place to another through mechanical movement. Its basic working principle is to use the power generated by the motor or manual operation to compress or push the air.

[0132] As an implementable embodiment, the switching member 400 has a first working state and a second working state. The switching member 400 can move along the direction indicated by the black solid arrow. Figure 10

[0133] ​The control member 800 is configured to control the working state of the switching member 400 according to the detection result of the detection member 300.

[0134] When the switching member 400 is in the first working state, the second air duct 230 and the volute air inlet 210 are not communicated.

[0135] When the switching member 400 is in the second working state, the second air duct 230 communicates the volute air inlet 210 and the second air outlet 130.

[0136] Exemplarily, when the switching member 400 is in the first working state, the passage between the second air duct 230 and the volute air inlet 210 is blocked, and the gas flow sucked by the range hood cannot enter the room through the second air duct 230 and the second air outlet 130.

[0137] When the switching member 400 is in the second working state, the passage between the second air duct 230 and the volute air inlet 210 is communicated, and the gas sucked by the range hood enters the room through the second air duct 230 and the second air outlet 130.

[0138] By setting the switching member 400 to have the first working state and the second working state, the range hood has different circulation paths when discharging oil fume, wherein the control member 800 is used to control the working state of the switching member 400 according to the detection result of the detection member 300, the user does not need to manually adjust the range hood, the range hood can adjust the discharge mode according to the actual needs, and the intelligent level of the range hood is improved.

[0139] As an implementable embodiment, the switching member 400 includes a driving part and a rotating part; the rotating part is rotationally connected with the inner periphery of the circulating air duct.

[0140] The driving part is used to drive the rotating part to rotate, so as to block the second air duct 230 and form the first working state of the switching member 400; or the driving part is used to drive the rotating part to rotate, so as to open the second air duct 230 and form the second working state of the switching member 400.

[0141] Exemplarily, the driving part is a power source of the switching member 400, which is responsible for providing power for rotating the rotating part. The driving part can be an electric motor, a pneumatic device, or a hydraulic device.

[0142] The rotating part is the core component of the switching piece 400, and can be a baffle. The rotating part is rotatably connected to the inner periphery of the circulating air duct, and can rotate under the action of the driving part, thereby changing the flow path of the oil fume sucked by the range hood. After the control piece 800 obtains the detection result of the detection piece 300, when the detection result shows that the concentration of particulate matter is less than the preset concentration, the driving part is controlled to operate, and the driving part drives the rotating part to rotate. In this way, the second air duct 230 communicates the volute air inlet 210 and the second air outlet 130, and the airflow entering the circulating air duct can be discharged to the indoor through the second air duct 230 and the second air outlet 130.

[0143] When the detection result shows that the concentration of particulate matter is greater than the preset concentration, the driving part is controlled to operate, and the driving part drives the rotating part to rotate. In this way, the second air duct 230 cannot communicate the volute air inlet 210 and the second air outlet 130, and the airflow entering the circulating air duct is discharged to the outdoor through the first air duct 220 and the first air outlet 120.

[0144] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

[0145] In order to facilitate explanation, the above description has been made in combination with specific embodiments. However, the above exemplary discussion is not intended to exhaust or limit the embodiments to the specific forms disclosed above. Various modifications and variations can be derived according to the above teachings. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different modified embodiments suitable for specific use considerations.

Claims

1. A range hood characterized by, The application relates to a kitchen hood, comprising: a body (100) formed with a containing cavity (110); the body (100) has: a first exhaust outlet (120) for connecting the containing cavity (110) with the outdoor; a second exhaust outlet (130) for connecting the containing cavity (110) with the indoor; a fan assembly comprising a volute (200) with a volute air inlet (210), the volute (200) is formed with a circulating air duct; the circulating air duct comprises: a first air duct (220) for connecting the volute air inlet (210) with the first exhaust outlet (120); a second air duct (230) for connecting the volute air inlet (210) with the second exhaust outlet (130); a detection piece (300) located in the circulating air duct, the detection piece (300) is used for detecting the particulate matter concentration of oil fume in the circulating air duct; a switching piece (400) which can selectively connect the second air duct (230) with the volute air inlet (210); an air injection piece (500) connected with the circulating air duct; a control piece (800), the fan assembly, the detection piece (300), the air injection piece (500) and the switching piece (400) are electrically connected with the control piece (800); the control piece (800) is configured to control the switching piece (400) to connect the second air duct (230) with the volute air inlet (210) according to the detection result of the detection piece (300), and control the air injection piece (500) to work according to the detection result of the detection piece (300).

2. The hood according to claim 1, characterized in that The air duct further comprises a main air duct (240), one end of the main air duct (240) is connected with the volute air inlet (210), and the other end of the main air duct (240) is connected with the first air duct (220) and the second air duct (230); the air injection piece (500) is connected with the second air duct (230) or the main air duct (240).

3. The hood according to claim 1, characterized in that, The application further comprises a disinfection assembly (600) used for disinfecting the second air duct (230); the disinfection assembly (600) is electrically connected with the control piece (800); the control piece (800) is configured to control the switching piece (400) to connect the second air duct (230) with the volute air inlet (210) according to the detection result of the detection piece (300), and control the air injection piece (500) to work and control the disinfection assembly (600) to work according to the detection result of the detection piece (300).

4. The hood according to claim 3, characterized in that, The disinfection assembly (600) is connected with the second air duct (230) through a disinfection pipeline, and an output end of the disinfection pipeline is arranged on one side of the second air duct (230) close to the volute air inlet (210).

5. The hood according to claim 3, wherein The disinfection assembly (600) comprises an ozone generator, which is communicated with the air injection member (500) through a first connecting pipe, and the air injection member (500) is communicated with the second air duct (230) through a second connecting pipe.

6. The hood according to claim 3, characterized in that, The disinfection assembly (600) comprises an ion sterilization member, which is communicated with the air injection member (500) through a first connecting pipe, and the air injection member (500) is communicated with the second air duct (230) through a second connecting pipe.

7. The hood according to any one of claims 1-6, characterized in that, Further comprising a filter member (700), and the machine body (100) has an air inlet, which is communicated with the volute air inlet (210); the air inlet is provided with the filter member (700).

8. The hood according to any one of claims 1-6, characterized in that, The detection member (300) comprises an optical particle sensor and a charge sensor. And / or, the air injection member (500) comprises an air pump.

9. The hood according to any one of claims 1-6, characterized in that, The switching member (400) has a first working state and a second working state. The control member (800) is configured to control the working state of the switching member (400) according to the detection result of the detection member (300). When the switching member (400) is in the first working state, the second air duct (230) is not communicated with the volute air inlet (210). When the switching member (400) is in the second working state, the second air duct (230) is communicated with the volute air inlet (210) and the second air outlet (130).

10. The hood according to claim 9, characterized in that, The switching member (400) comprises a driving part and a rotating part; the rotating part is rotatably connected with the inner periphery of the circulating air duct. The driving part is used to drive the rotating part to rotate, so that the rotating part blocks the second air duct (230), forming the first working state of the switching member (400); or the driving part is used to drive the rotating part to rotate, so that the rotating part opens the second air duct (230), forming the second working state of the switching member (400).

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