Range hood

Abstract

The present application provides a kind of range hood, it is related to the technical field of kitchen appliance, range hood includes: shell, fan assembly and water net device, fan assembly and water net device are all installed in the inside of shell;Shell is provided with air inlet;The inside of shell is provided with channel along air inlet to fan assembly;Water net device includes multiple spray assemblies, and the water column sprayed by multiple spray assemblies is used to form water net in the channel.

Description

Technical Field

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

[0002] Chinese cooking, with its unique high-temperature processing methods such as frying, stir-frying, boiling, and deep-frying, produces a large amount of oily fumes with high concentrations of oil. These fumes are characterized by high temperature, high viscosity, and fine particles, posing a unique challenge to kitchen air purification equipment.

[0003] Currently, most mainstream fume purification equipment on the market relies on mechanical filtration principles, physically intercepting oil fume particles through metal filter screens. However, during long-term use, the grease components in the high-temperature fumes quickly form an adhesive layer on the filter screen fibers. As the grease accumulates, the filter screen pores gradually become clogged, leading to narrowing of the airflow channels and a decrease in fume extraction efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a range hood that alleviates the technical problem of oil stains easily adhering to the oil filter of existing range hoods.

[0005] In a first aspect, the present invention provides a range hood comprising: a housing, a fan assembly, and a water network device, wherein the fan assembly and the water network device are both installed inside the housing; An air inlet is provided on the housing; a channel leading from the air inlet to the fan assembly is provided inside the housing; The water network device includes multiple jetting components, and the water jets emitted by the multiple jetting components are used to form a water network within the channel.

[0006] Furthermore, at least two of the spraying components have different spraying directions; And / or, in the direction from the air inlet toward the fan assembly, at least two jet components are sequentially arranged in the channel.

[0007] Furthermore, from the air inlet toward the fan assembly, at least two jetting components arranged sequentially within the channel have different jetting directions.

[0008] Furthermore, the water network device includes a first spray assembly and a second spray assembly arranged sequentially along the channel. The first spray assembly includes a plurality of first nozzles, each spraying in a first direction, and the plurality of first nozzles form a first water curtain. The second spray assembly includes multiple second nozzles, each spraying in a second direction, which form a second water curtain; the first direction and the second direction are arranged at an angle. Both the first and second water curtains are located between the air inlet and the fan assembly, and the first and second water curtains are parallel to each other, forming a first water network.

[0009] Furthermore, the water network device includes a third jet assembly and a fourth jet assembly arranged sequentially along the channel. The third jet assembly and the first jet assembly are respectively arranged on opposite sides of the housing, and the fourth jet assembly and the second jet assembly are respectively located on opposite sides of the housing. The third jet assembly includes multiple third nozzles, all of which are jetted in the first direction, and the multiple third nozzles form a third water curtain; The fourth jet assembly includes multiple fourth nozzles, all of which are directed in the second direction, and the multiple fourth nozzles form a fourth water curtain; The third and fourth water curtains are both located between the air inlet and the fan assembly, and the first, second, third and fourth water curtains are parallel and form a second water network.

[0010] Furthermore, the housing includes an outer shell and an inner shell, with the inner shell located inside the outer shell and a gap provided between them; The hollow region of the inner shell forms a channel; A water-avoiding hole is provided on the surface of the inner shell facing the spraying component, so that the water jet sprayed by the spraying component passes through the water-avoiding hole and enters the gap. The range hood includes a water receiving structure, which is located below the gap, and the gap is connected to the water receiving structure.

[0011] Furthermore, a flow guide is provided within the gap. The flow guide includes a flow guide surface, which is located outside the water-avoiding hole and is set at an angle to the plane where the water-avoiding hole is located.

[0012] Furthermore, it also includes a baffle connected to the housing and located below the air inlet, with the vertical downward projection of the air inlet falling entirely on the baffle. The baffle is equipped with a drainage structure, which is located above the water receiving structure.

[0013] Furthermore, it also includes an oil fume detection device, which is located between the fan assembly and the water network device; The fume detection device is used to detect the concentration of oil fumes entering the fan assembly; Furthermore, the water network device is electrically connected to the oil fume detection device. The water network device adjusts the number of spray components that are activated according to the oil fume concentration. When the oil fume concentration is m, the number of spray components that are activated is n. When the oil fume concentration is p, the number of spray components that are activated is q. If m is greater than p, then n is greater than q.

[0014] Furthermore, at least one injection component is rotatably connected to the housing; A drive mechanism is installed on the housing. The spray assembly, which is rotatably connected to the housing, is connected to the drive mechanism. The drive mechanism is used to drive the spray assembly to swing, so that the spray assembly switches between working state and cleaning state. In the working state, the water jet ejected by the spray assembly is used to form a water network. In the cleaning state, the nozzle of the spray assembly is directed towards the oil fume detection device, the fan assembly, or the inner wall of the housing.

[0015] This invention has at least the following advantages or beneficial effects: The range hood provided by the present invention includes: a housing, a fan assembly, and a water network device, wherein the fan assembly and the water network device are both installed inside the housing; an air inlet is provided on the housing; a channel is provided inside the housing along the air inlet to the fan assembly; the water network device includes multiple spraying components, and the water jets sprayed by the multiple spraying components are used to form a water network in the channel.

[0016] After the fan assembly and water network device are started, a negative pressure is generated at the air inlet, and the oil fumes are drawn into the fan assembly through the channel. During the journey of the oil fumes, they need to pass through the water network formed by the water network device. Through inertial collision, diffusion adsorption, and condensation sedimentation, the oil particles, dust, and odor molecules in the oil fumes are efficiently captured. Unlike existing technologies, the water network does not form a fixed mesh structure within the channel. Therefore, it avoids problems such as the gradual clogging of the filter pores due to grease solidification and the narrowing of the airflow channel, thus improving the smoke extraction efficiency. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the internal structure of a range hood as seen from the front view, provided in an embodiment of the present invention. Figure 2 for Figure 1 A magnified view of a portion of position A in the middle; Figure 3 This is a schematic diagram of the internal structure of a range hood in a side view according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the spray assembly of a range hood provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the first and second spray components in a range hood provided in an embodiment of the present invention; Figure 6This is a schematic diagram of the third and fourth jet components in a range hood provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the water receiving structure of a range hood provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of the filter assembly of a range hood provided in an embodiment of the present invention; Figure 9 This is a schematic diagram of the spray assembly of a range hood in a clean state, as provided in an embodiment of the present invention.

[0019] Icons: 110 - Outer shell; 120 - Inner shell; 121 - Water-proof hole; 130 - Gap; 131 - Air guide; 140 - Air inlet; 200 - Fan assembly; 300 - Injection assembly; 310 - First injection assembly; 320 - Second injection assembly; 330 - Third injection assembly; 340 - Fourth injection assembly; 400 - Water receiving structure; 410 - Upper cavity; 420 - Lower cavity; 430 - Flow detector; 440 - Water level detector; 500-baffle; 600 - Circulation device; 700 - Filter assembly; 710 - Filter block; 800-Fume Detection Device; 900-Drive mechanism. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] like Figure 1 As shown, the range hood provided by the present invention includes: a housing, a fan assembly 200, and a water network device.

[0027] The housing may include a fan housing 110 and a smoke collection hood. The specific shape of the housing varies depending on the type of range hood. In this embodiment, the vertical projected area of ​​the fan housing 110 is smaller than the vertical projected area of ​​the smoke collection hood. In another possible implementation, the housing can be a cylindrical structure with a substantially unchanged transverse cross-sectional shape.

[0028] Both the fan assembly 200 and the water network device are installed inside the housing and can be fixedly connected using threaded locking devices. The fan assembly 200 is located above the water network device, and the oil fumes flowing from bottom to top must pass through the water network device before entering the fan assembly 200.

[0029] The casing is provided with an air inlet 140 that connects the inside and outside of the casing, through which external fumes enter the interior of the casing.

[0030] The housing contains a channel extending from the air inlet 140 to the fan assembly 200. In this embodiment, the channel extends vertically, meaning the air inlet 140 is located directly below the fan assembly 200. In other possible implementations, the channel may not extend in a straight line; for example, it may extend in a curved direction, as long as it ensures that the fumes enter through the air inlet 140, flow along the channel's extension direction, and pass sequentially through the water network device and the fan assembly 200.

[0031] like Figure 1 and Figure 2 As shown, the water network device includes multiple spray components 300. The spray components 300 are connected to the water tank built into the range hood or directly to the water pipe in the kitchen. After being started, they can spray water jets.

[0032] In this embodiment, among the multiple spraying components 300, at least two spraying components 300 have different spraying directions.

[0033] The water jets from two spraying components 300 with different spraying directions intersect within the water network, making the network more complex and increasing the likelihood of the water network coming into contact with the cooking fumes. The two spraying components 300 with different spraying directions can be positioned on the same plane or on different planes.

[0034] In another feasible solution, a single spray component 300 can spray a water column, and multiple spray components 300 are arranged in a row with the same spray direction. The water columns sprayed by the multiple spray components 300 are parallel and located on the same plane, forming a "rib"-shaped water network. There is no interference between adjacent water columns, avoiding water column deformation and reducing the adsorption efficiency of oil fumes.

[0035] In this embodiment, at least two jetting components 300 are sequentially arranged in the channel from the air inlet 140 toward the fan assembly 200.

[0036] The fumes enter through the air inlet 140, and then pass through the water column formed by the spray assembly 300 near the air inlet 140, and then through the water column formed by the spray assembly 300 away from the air inlet 140. The fumes can come into contact with the water column multiple times, thereby improving the adsorption efficiency of the water network for the fumes.

[0037] From the air inlet 140 toward the fan assembly 200, at least two jet assemblies 300 with different jet directions are sequentially arranged in the channel.

[0038] The two spraying components 300 are spaced apart in the extension direction of the channel, and the water jets sprayed by the two do not interfere with each other, ensuring the integrity of the water jets. Furthermore, in a top-down view, the water jets sprayed by the spraying components 300 with different spraying directions intersect, forming a cross-shaped water network, increasing the contact area with the oil fumes.

[0039] In another feasible solution, multiple spraying components 300 can be located on the same plane, that is, from the air inlet 140 toward the fan component 200. With multiple spraying components 300 located on the same plane, the multiple water jets sprayed out are also located on the same plane, forming a single-layer water network. Interference may occur between the water jets, but it does not affect the overall structure of the water network. The water network can still adsorb the oil fumes passing through it.

[0040] After the fan assembly 200 and the water network device are started, a negative pressure is generated at the air inlet 140, and the oil fumes are drawn into the fan assembly 200 through the channel from the air inlet 140. During the journey of the oil fumes, they need to pass through the water network formed by the water network device. Through inertial collision, diffusion adsorption, and condensation sedimentation, the oil particles, dust, and odor molecules in the oil fumes are efficiently captured. Unlike existing technologies, the water network does not form a fixed mesh structure within the channel, thus avoiding problems such as the gradual clogging of the filter pores due to grease solidification and the narrowing of the airflow channel, thereby improving the smoke extraction efficiency.

[0041] In this embodiment, the spray assembly 300 may include multiple synchronously arranged nozzles, the orifice diameter of which can be controlled within 1 mm to form a high-pressure water jet. Specifically, the spray assembly 300 includes multiple nozzles arranged in a row. In this embodiment, there are eight spray assemblies 300, arranged from bottom to top in the following order: front, left, rear, right, front, left, rear, right. Two circumferentially adjacent spray assemblies 300 form a pair, creating a total of four layers of water network. Specifically, from bottom to top, the two spray assemblies 300 on the front and left sides form the first layer; the two spray assemblies 300 on the rear and right sides form the second layer; the two spray assemblies 300 on the front and left sides form the third layer; and the two spray assemblies 300 on the rear and right sides form the fourth layer. In other feasible implementations, the number of spray assemblies 300 may be increased or decreased.

[0042] like Figure 5 As shown, the water network device includes a first spray assembly 310 and a second spray assembly 320 arranged sequentially along the channel. The first spray assembly 310 includes a plurality of first nozzles, each with a spray direction of a first direction, forming a first water curtain. The second spray assembly 320 includes a plurality of second nozzles, each with a spray direction of a second direction, forming a second water curtain. The first direction and the second direction are arranged at an angle. Both the first water curtain and the second water curtain are located between the air inlet 140 and the fan assembly 200, and the first water curtain and the second water curtain are parallel to each other and form a first water network.

[0043] In this embodiment, the spraying directions of the first and second nozzles are perpendicular. The first nozzles spray water towards the rear, forming a first water curtain composed of multiple parallel water jets. The second nozzles spray water towards the right, forming a second water curtain composed of multiple parallel water jets. The first and second water curtains are vertically spaced apart, with the vertical gap between them being as small as possible (ensuring no interference between the first and second water curtains). The mesh of the water network formed by the first spray assembly 310 and the second spray assembly 320 is rectangular. Alternatively, the first and second directions can form other angles, such as 30° or 45°, resulting in a rhomboid mesh shape.

[0044] like Figure 6 As shown, the water network device includes a third spray assembly 330 and a fourth spray assembly 340 arranged sequentially along the channel. The third spray assembly 330 and the first spray assembly 310 are respectively arranged on opposite sides of the housing, and the fourth spray assembly 340 and the second spray assembly 320 are respectively located on opposite sides of the housing. The third spray assembly 330 includes multiple third nozzles with the spray direction being a first direction, and the multiple third nozzles form a third water curtain. The fourth spray assembly 340 includes multiple fourth nozzles with the spray direction being a second direction, and the multiple fourth nozzles form a fourth water curtain. The third water curtain and the fourth water curtain are both located between the air inlet 140 and the fan assembly 200, and the first water curtain, the second water curtain, the third water curtain and the fourth water curtain are parallel and form a second water network.

[0045] The third spray assembly 330 and the fourth spray assembly 340 are respectively disposed on opposite sides of the first spray assembly 310 and the second spray assembly 320. The third spray assembly 330 and the fourth spray assembly 340 form a water network in the same way as the first spray assembly 310 and the second spray assembly 320. The first spray assembly 310, the second spray assembly 320, the third spray assembly 330 and the fourth spray assembly 340 are arranged alternately. By setting spray assemblies 300 on all four sides of the housing, a second water network with a denser mesh can be obtained, thereby improving the ability to capture oil fumes.

[0046] The first spray assembly 310, the second spray assembly 320, the third spray assembly 330 and the fourth spray assembly 340 form a spray net group, and there are multiple spray net groups along the extension direction of the channel.

[0047] In this embodiment, there are two spray net groups, formed by eight spray components 300. Users can selectively activate one or both spray net groups depending on the amount of oil fumes generated during cooking. For example, when stir-frying, which produces a large amount of oil fumes, both spray net groups can be activated; conversely, when steaming, only one spray net group can be activated to save energy.

[0048] In other feasible solutions, the number of nozzles in the spray assembly 300 can be only one, and multiple spray assemblies 300 are arranged in the housing from bottom to top in a spiral manner. Each spray assembly 300 has a different spray direction, and they are all facing the center of the housing to avoid interference between water columns.

[0049] like Figure 2 As shown, the housing includes an outer shell 110 and an inner shell 120. The inner shell 120 is located inside the outer shell 110, and a gap 130 is provided between the two. The hollow area of ​​the inner shell 120 forms a channel. A water-avoiding hole 121 is provided on the surface of the inner shell 120 facing the spray assembly 300, so that the water jet sprayed by the spray assembly 300 passes through the water-avoiding hole 121 and enters the gap 130. The range hood includes a water-receiving structure 400, which is located below the gap 130 and is connected to the gap 130.

[0050] In this embodiment, both the outer shell 110 and the inner shell 120 are rectangular cylindrical structures. The inner shell 120 is located at the center of the outer shell 110, meaning that there are gaps 130 between the inner shell 120 and the outer shell 110 on all four sides. Taking a spray assembly 300 located on the left as an example, a water-avoiding hole 121 is provided at the same height on the right side of the inner shell 120. The water-avoiding hole 121 is horizontally aligned with the spray assembly 300 located on the left. The water jet sprayed by the spray assembly 300 enters the gap 130 between the inner shell 120 and the outer shell 110 through the water-avoiding hole 121, preventing the water jet from directly impacting the inner shell 120 and causing water to splash in the channel. The water entering the gap 130 will flow into the water receiving structure 400 under the action of gravity, realizing water recycling. In other possible solutions, both the outer shell 110 and the inner shell 120 may be cylindrical structures, or the outer shell 110 and the inner shell 120 may have different external profiles. For example, the outer shell 110 may be a cylindrical structure, while the inner shell 120 may be a rectangular cylindrical structure.

[0051] A flow guide 131 is provided in the gap 130. The flow guide 131 includes a flow guide surface, which is located outside the water-avoiding hole 121. The flow guide surface is set at an angle to the plane where the water-avoiding hole 121 is located.

[0052] The guide element 131 can be installed on the housing 110, along the axial direction of the water-avoiding hole 121, from the inside out. The projection of the water-avoiding hole 121 falls on the guide surface, which can be a plane. Specifically, the cross-section of the guide element 131 can be triangular, with its side facing the water-avoiding hole 121 being inclined to the horizontal plane (e.g., at a 45° angle). Water jets sprayed horizontally are reflected by the guide surface, causing the water flow to flow vertically downwards, preventing water jet rebound from interfering with other water jets and ensuring the continuity and stability of the water curtain network. In other feasible solutions, the guide surface can also be an arc surface concave towards the side away from the water-avoiding hole 121. The tangent direction at one end of the arc surface is set horizontally, and the tangent direction at the other end is set vertically. When the water jet is sprayed onto the arc surface, the water flow flows downwards along the arc surface. The arc surface acts as a buffer and guide, directing the water flow downwards into the water receiving structure.

[0053] like Figure 1 and Figure 3 As shown, the range hood also includes a baffle 500 connected to the housing and located directly below the air inlet 140. The vertical downward projection of the air inlet 140 falls entirely on the baffle 500. A drainage structure is provided on the baffle 500, which is located above the water receiving structure 400.

[0054] In this embodiment, the air inlet 140 is located directly below the water network device. When the water network is formed, most of the water will pass through the water-avoiding hole 121 and flow into the water-receiving structure through the gap between the outer shell 110 and the inner shell 120. However, a small amount of water will fall from the air inlet 140. Therefore, in this embodiment, a baffle 500 is provided below the air inlet 140. The baffle 500 can catch water droplets falling from above, preventing water droplets from falling directly onto the stovetop. The drainage structure on the baffle 500 is used to guide the water on the top surface of the baffle 500 into the water-receiving structure 400.

[0055] There is a vertical gap between the baffle 500 and the air inlet 140, allowing oil fumes to bypass the baffle 500 and enter the air inlet 140. In other feasible solutions, the air inlet 140 and the water network can be no longer aligned vertically, but the channel can be made curved, so that the water falling from the water network device falls into the housing instead of into the air inlet 140. In this case, the baffle 500 can be omitted.

[0056] The water receiving structure 400 is located behind the baffle 500 and has an opening at its top. The baffle 500 can be tilted, with the front higher than the back, so that water flows backward on it. The drainage structure can be a guide hole on the baffle 500. Water flowing from front to back falls through the guide hole and into the water receiving structure 400 directly below it. The water receiving structure 400 not only receives water flowing out from the gap between the inner shell 120 and the outer shell 110, but also receives water flowing down from the baffle 500.

[0057] like Figure 3 As shown, the water network device also includes a filter assembly 700 and a circulation device 600. The filter assembly 700 is connected to the water receiving structure 400; the circulation device 600 is connected to both the water receiving structure 400 and the spray assembly 300.

[0058] The filter assembly 700 is used to filter the water within the receiving structure 400. The filter assembly 700 separates oil-containing wastewater from water, intercepting the oil and allowing clean water to pass through and enter the receiving structure 400. A circulation device 600 is located between the receiving structure 400 and the spray assembly 300, connected to both via pipelines. The circulation device 600 includes a water pump that supplies clean water (filtered by the filter assembly 700) from the receiving structure 400 to the spray assembly 300, enabling water reuse. Users only need to replace the filter assembly 700 periodically. The filter assembly 700 can be filter cotton or filter paper. Circulation filtration reduces water consumption.

[0059] like Figure 7 As shown, the water receiving structure 400 includes an upper cavity 410 and a lower cavity 420 arranged vertically, and the upper cavity 410 and the lower cavity 420 are connected by a through hole; the filter assembly 700 is disposed in the upper cavity 410 and covers the through hole.

[0060] Specifically, the water receiving structure 400 has an upper chamber 410 and a lower chamber 420 internally, which are connected by a through hole. The upper chamber 410 is used to receive water containing oil. The filter assembly 700 is disposed in the upper chamber 410 and covers the through hole. The water needs to be filtered by the filter assembly 700 before it can flow into the lower chamber 420 through the through hole. The upper chamber 410 acts as a buffer for wastewater, allowing time for the filter assembly 700 to filter. The lower chamber 420 is used to collect and store the filtered water for extraction by the circulation device 600. Specifically, in this embodiment, the water receiving structure 400 can be box-shaped with an open top. Its interior is divided into upper and lower layers, separated by a partition. The through hole is disposed on the partition. The filter assembly 700 can be installed on the partition, completely covering the through hole. Wastewater flowing down from above enters the upper chamber 410, and then, under the filtration of the filter assembly 700, clean water flows into the lower chamber 420 through the through hole.

[0061] The water-collecting structure 400 can be connected to the oil circuit of the range hood to collect the grease inside the range hood; that is, the grease inside the range hood ultimately falls into the water-collecting structure 400. Compared to the oil cup on a range hood in the prior art, the water-collecting structure 400 in this embodiment is larger in volume.

[0062] A flow detector 430 is installed in the lower cavity 420 to detect the flow rate of the through hole.

[0063] A flow detector 430 can be installed at the through-hole. The flow detector 430 can be electrically connected to the control unit of the range hood or connected separately to the first alarm. If the water flow detected by the flow detector 430 does not reach the preset value after the water network device has been running for a period of time, it indicates that the filter component 700 is saturated and its filtration capacity is insufficient, requiring replacement. The control unit or the first alarm can then send a signal to the user to remind them to replace the filter component 700.

[0064] A water level detector 440 is installed in the lower cavity 420.

[0065] A water level detector 440 can also be installed in the lower cavity 420 to detect the water level inside the lower cavity 420. The water level detector 440 is electrically connected to the control unit of the range hood or a separate second alarm, and can detect the water level in the lower cavity 420 in real time. When the water level is lower than a preset threshold, it indicates that the water volume of the entire circulation system is insufficient. The water level detector 440 will trigger an alarm to prompt the user to manually add water, so as to avoid the failure of the water network device due to water shortage.

[0066] like Figure 8 As shown, the filter assembly 700 may include a frame and multiple filter blocks 710 arranged in a matrix. These filter blocks 710 absorb oil but not water; water seeps into the lower chamber 420 after passing through the filter blocks 710, while the oil is completely absorbed. Each filter block 710 is detachably connected to the frame, facilitating individual replacement of each filter block 710.

[0067] like Figure 1 As shown, the range hood also includes an oil fume detection device 800, which is located between the fan assembly 200 and the water network device. The oil fume detection device 800 is used to detect the concentration of oil fumes entering the fan assembly 200. The water network device is electrically connected to the oil fume detection device 800, and the water network device adjusts the number of spray components 300 that are activated according to the oil fume concentration. When the oil fume concentration is m, the number of spray components 300 that are activated is n. When the oil fume concentration is p, the number of spray components 300 that are activated is q. If m is greater than p, then n is greater than q.

[0068] The oil fume detection device 800 can identify the current amount of oil fume through image recognition, thereby automatically controlling the number of activated spray components 300 and adjusting the density of the oil mesh. The activation of the spray components is directly proportional to the oil fume concentration. For example, when stir-frying, if a large amount of oil fume is detected, both spray mesh groups can be activated; conversely, when steaming, if a small amount of oil fume is detected, only one spray mesh group can be activated, saving energy.

[0069] like Figure 4 and Figure 9As shown, at least one spray assembly 300 is rotatably connected to the housing; a drive mechanism 900 is mounted on the housing, and the spray assembly 300 rotatably connected to the housing is connected to the drive mechanism 900. The drive mechanism 900 is used to drive the spray assembly 300 to swing, so that the spray assembly 300 switches between a working state and a cleaning state. In the working state, the water jet ejected by the spray assembly 300 is used to form a water network; in the cleaning state, the nozzle of the spray assembly 300 is directed toward the oil fume detection device 800, the fan assembly 200, or the inner wall of the housing.

[0070] In operation, the spray assembly 300 emits a horizontal water jet to form a water network that filters the fumes. However, after the range hood has been running for a period of time, if the lens of the image acquisition mechanism of the fume detection device 800 becomes heavily contaminated with grease and cannot acquire images properly, the spray assembly 300 can be rotated and directed towards the fume detection device 800 to rinse its lens with high-pressure water. In other scenarios, the spray assembly 300 can also be rotated to other angles by the drive mechanism 900, allowing the nozzle to be aimed at the inner wall of the inner shell 120 or the fan assembly 200 for high-pressure water spraying and cleaning.

[0071] Specifically, the drive mechanism 900 may include a motor, and multiple nozzles within the same spray assembly 300 are connected to the same bracket. The bracket is connected to the output shaft of the motor, and the motor drives the bracket to rotate relative to the housing, so as to realize the synchronous change of the spray angle of multiple nozzles.

[0072] The image acquisition mechanism is equipped with an independent sealed protective housing. The lens end of the image acquisition mechanism can be equipped with a transparent protective cover, such as tempered protective glass with an oil-proof and anti-fog coating. The protective cover is sealed to the housing of the mechanism to isolate oil fumes and water vapor, for example, by using a ring-shaped silicone sealing ring for compression sealing.

[0073] The range hood control method provided by the present invention, executed by the aforementioned range hood, includes the following steps: When the oil fume concentration is within the range of P1, control K1 injection components 300 to form a water network; When the oil fume concentration is within the range of P2, control K2 injection components 300 to form a water network; When the oil fume concentration is within the P3 range, control K3 injection components 300 to form a water network; And so on; When the concentration of cooking fumes is at P n When within the range, control K m 300 spray components form a water network; Among them, the maximum value of P1 is less than the minimum value of P2, the maximum value of P2 is less than the minimum value of P3, and so on. n-1 The maximum value is less than Pn The minimum value; K1, K2, K3...K m The numbers increase sequentially, and K1 is greater than 1.

[0074] The more spray components 300 are activated, the larger the surface area of ​​the water network formed, and the higher the efficiency of oil fume adsorption. The range hood can automatically adjust the number of spray components 300 activated according to the current amount of oil fume. The greater the amount of oil fume, the more spray components 300 need to be activated, thereby achieving reasonable energy allocation, avoiding both energy waste and insufficient oil fume filtration. When the oil fume concentration is within the P1 range, the oil fume concentration is relatively low, and K1 spray components 300 are controlled to form a water network. At this time, the water network formed can be a single-layer mesh structure. For example, the first spray component 310 and the second spray component 320 in a spray network group can be activated. When the oil fume concentration rises to the P2 range, the first spray component 310, the second spray component 320, the third spray component 330, and the fourth spray component 340 in a spray network group can be activated to form a double-layer mesh structure. When the oil fume concentration is within the P3 range, after one spray mesh is fully activated, the first spray component 310 and the second spray component 320 in another spray mesh group are activated to form a three-layer mesh structure of water network, and so on, until the oil fume concentration is within the P range. n When the range is wide, all operable spray components 300 are activated, thus forming a multi-layered water network arranged sequentially from top to bottom.

[0075] The range hood control method provided by this invention is executed by the aforementioned range hood and includes the following steps: Obtain the image recognition accuracy of the image acquisition agency; When the image recognition rate is lower than the preset value, the drive mechanism 900 drives at least one set of spraying components 300 to switch from working state to cleaning state and clean the image acquisition mechanism.

[0076] like Figure 9 As shown, when the range hood is working, it needs to use an image acquisition mechanism to obtain the amount of oil fumes. Due to the presence of oil fumes in its working environment, the lens of the image acquisition mechanism is easily contaminated, resulting in a decrease in recognition ability. When it detects that its recognition ability has decreased and it cannot complete image acquisition normally, it controls the drive mechanism 900 to switch the spray assembly 300 from the working state to the cleaning state and cleans the image acquisition mechanism, so that its image recognition accuracy is higher than or equal to the preset value, and it can normally identify the amount of oil fumes.

[0077] The specific process flow is as follows: When the range hood is turned on, the fan assembly 200 operates, drawing the cooking fumes into the housing. First, the image acquisition unit (camera) collects real-time data on the concentration of the cooking fumes.

[0078] The system divides the oil fume concentration into four ranges: P < 20%, 20% ≤ P < 50%, 50% ≤ P < 80%, and P ≥ 80%. Based on the different concentration ranges, the system matches the number of spray components 300 that are activated in 2, 4, 6, and 8 rows, respectively, to form a water network with different coverage areas, thereby achieving graded interception and purification of oil fumes.

[0079] The water jet sprayed by the spray component 300, along with the oil from the cooking fumes, is injected into the water-avoiding hole 121 on the opposite side. After being guided downwards by the flow guide surface, the oil-water mixture first enters the upper chamber 410 of the water-receiving structure 400, where the oil is absorbed by the filter component 700, and the water enters the lower chamber 420. Subsequently, the flow detector 430 monitors the water flow rate entering the lower chamber 420 in real time. When the flow rate is below the 30% threshold, the filter component 700 is deemed saturated, and the system prompts for replacement. When the flow rate is ≥30%, the range hood maintains normal operation, and the water level in the lower chamber 420 is monitored by the water level detector 440. If the water level is below the 40% threshold, the system prompts for water replenishment; if the water level is ≥30%, the system is considered to be in normal operation and continues to run.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A range hood, characterized by include: The housing, the fan assembly (200), and the water network device are all installed inside the housing; An air inlet (140) is provided on the housing; a channel is provided inside the housing along the air inlet (140) to the fan assembly (200); The water network device includes multiple spraying components (300), and the water jets sprayed by the multiple spraying components (300) are used to form a water network in the channel.

2. The range hood according to claim 1, characterized in that At least two of the spraying assemblies (300) have different spraying directions; And / or, at least two of the jetting assemblies (300) are sequentially arranged in the channel from the air inlet (140) toward the fan assembly (200).

3. The range hood according to claim 2, characterized in that From the air inlet (140) toward the fan assembly (200), at least two of the jetting assemblies (300) arranged sequentially in the channel have different jetting directions.

4. The range hood according to claim 3, characterized in that The water network device includes a first spray assembly (310) and a second spray assembly (320) arranged sequentially along the channel. The first spray assembly (310) includes a plurality of first nozzles, each with a spray direction of a first direction, and the plurality of first nozzles form a first water curtain. The second spray assembly (320) includes a plurality of second nozzles, each with a spray direction of the second direction, which together form a second water curtain; the first direction and the second direction are arranged at an angle. The first water curtain and the second water curtain are both located between the air inlet (140) and the fan assembly (200), and the first water curtain and the second water curtain are parallel to each other and form a first water network.

5. The range hood according to claim 4, wherein The water network device includes a third spray assembly (330) and a fourth spray assembly (340) arranged sequentially along the channel. The third spray assembly (330) and the first spray assembly (310) are respectively arranged on opposite sides of the housing, and the fourth spray assembly (340) and the second spray assembly (320) are respectively located on opposite sides of the housing. The third spray assembly (330) includes a plurality of third nozzles, each with a spray direction of the first direction, and the plurality of third nozzles form a third water curtain; The fourth spray assembly (340) includes a plurality of fourth nozzles, each with a spray direction of the second direction, and the plurality of fourth nozzles form a fourth water curtain; The third and fourth water curtains are both located between the air inlet (140) and the fan assembly (200), and the first, second, third and fourth water curtains are parallel and form a second water network.

6. The range hood according to any one of claims 1-5, characterized in that The housing includes an outer shell (110) and an inner shell (120), the inner shell (120) being located inside the outer shell (110), and a gap (130) being provided between the two. The hollow region of the inner shell (120) forms the channel; A water-avoiding hole (121) is provided on the surface of the inner shell (120) facing the spray assembly (300) so that the water column sprayed by the spray assembly (300) passes through the water-avoiding hole (121) and enters the gap (130). The range hood comprises a water receiving structure (400) located below the gap (130) and in communication with the gap (130).

7. The range hood according to claim 6, characterized in that The gap (130) is provided with a flow guide (131) comprising a flow guide surface arranged outside the water avoiding hole (121) and at an angle to the plane in which the water avoiding hole (121) is located.

8. The range hood according to claim 6, wherein The range hood further comprises a baffle (500) connected to the shell and located below the air inlet (140), and a vertical downward projection of the air inlet (140) completely falls on the baffle (500). The baffle (500) is provided with a water draining structure located above the water receiving structure (400).

9. The hood as claimed in any one of claims 1 to 5, wherein, The range hood further comprises an oil fume detection device (800) located between the fan assembly (200) and the water net device. The oil fume detection device (800) is used to detect the oil fume concentration entering the fan assembly (200). The water net device is electrically connected to the oil fume detection device (800), and the water net device adjusts the number of the spray assemblies (300) according to the oil fume concentration; when the oil fume concentration is m, the number of the spray assemblies (300) is n, when the oil fume concentration is p, the number of the spray assemblies (300) is q, m is greater than p, and n is greater than q.

10. The range hood according to claim 9, characterized in that At least one of the spray assemblies (300) is rotationally connected to the shell. The shell is provided with a driving mechanism (900), the spray assemblies (300) rotationally connected to the shell are connected to the driving mechanism (900), and the driving mechanism (900) is used to drive the spray assemblies (300) to swing, so as to switch the spray assemblies (300) between a working state and a cleaning state; in the working state, the water column sprayed by the spray assemblies (300) is used to form a water net; in the cleaning state, the spray openings of the spray assemblies (300) are directed towards the oil fume detection device (800), the fan assembly (200) or the inner wall of the shell.

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