A range hood

Abstract

The utility model provides an oil smoke machine belongs to kitchen appliance technical field, this oil smoke machine, include: fan system, shell subassembly, gather smoke board subassembly and gather smoke board drive subassembly, shell subassembly is located below fan system, the top of shell subassembly is connected with the bottom of fan system, the bottom of shell subassembly is set up near the bottom of fan system, the rear side of the bottom of shell subassembly has the air intake, gather smoke board drive subassembly is installed respectively between fan system bottom and the left and right sides front end of the area of the bottom of shell subassembly, gather smoke board subassembly sets up at the air intake, the output of gather smoke board drive subassembly is connected with gather smoke board subassembly, is used for driving its open / close air intake. Set up gather smoke board drive subassembly in the non air current core channel area of the lower part of the fence, avoided the interference to the main stream airflow path, thereby guaranteed the aerodynamic performance of oil smoke machine is not influenced, ensured that the smoke suction efficiency is stable and efficient.

Description

Technical Field

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

[0002] With the improvement of people's living standards and the enhancement of health awareness, the problem of kitchen fumes is receiving increasing attention. As an indispensable piece of equipment in modern kitchens, the main function of a range hood is to use a fan system to generate negative pressure, sucking in the fumes produced during cooking and expelling them outdoors through exhaust ducts, thereby keeping indoor air fresh and reducing harm to human health.

[0003] Traditional range hoods typically consist of basic components such as a casing, fan system, smoke collection panel assembly, smoke hood, and grease filter. The fan system, installed inside the casing, generates negative pressure to draw in cooking fumes. The smoke collection panel assembly, located at the top front, creates a closed space when closed, enhancing smoke extraction. The smoke hood, positioned at the bottom front, guides the fumes into the device. The grease filter, installed at the smoke hood's inlet, intercepts grease particles, preventing them from entering the fan system.

[0004] However, in actual use, the smoke collection plate drive mechanism of traditional range hoods is usually concentrated inside the outer shell assembly, which occupies a lot of space. Utility Model Content

[0005] To address the aforementioned problems, the purpose of this invention is to provide a range hood that saves space and avoids interfering with the airflow channel.

[0006] A range hood is provided, comprising: a fan system, a housing assembly, a smoke-collecting plate assembly, and a smoke-collecting plate drive assembly. The housing assembly is located below the fan system, and its top is connected to the bottom of the fan system. The bottom front side of the housing assembly is disposed near the bottom of the fan system, and the bottom rear side of the housing assembly has an air inlet. The smoke-collecting plate drive assembly is respectively installed on the left and right front ends of the area between the bottom of the fan system and the bottom of the housing assembly. The smoke-collecting plate assembly is disposed at the air inlet, and the output end of the smoke-collecting plate drive assembly is connected to the smoke-collecting plate assembly for driving it to open / close the air inlet.

[0007] Furthermore, the fan system includes a enclosure and an impeller disposed within the enclosure;

[0008] The impeller is located in the center of the enclosure and is positioned between the air inlet and the air outlet along the airflow direction.

[0009] The two smoke-collecting plate drive assemblies are respectively fixedly connected to the left and right sides of the lower part of the enclosure.

[0010] Furthermore, it also includes two protective shields;

[0011] The protective cover is installed inside the enclosure. The protective cover, the enclosure, and the outer shell assembly enclose a cavity that is isolated from the space inside the enclosure. The smoke-collecting plate drive assembly is located inside the cavity, and the output end of the smoke-collecting plate drive assembly passes through the cavity and is connected to the front end of the back of the smoke-collecting plate assembly.

[0012] Furthermore, the smoke-collecting plate driving assembly includes a driving member and a linkage mechanism. The driving member drives the smoke-collecting plate assembly to open and close through the linkage mechanism. The linkage mechanism includes a hinged link and an output link. The hinged link is connected between the output end of the driving member and the output link. The output end of the output link passes through the chamber and is connected to the front end of the back of the smoke-collecting plate assembly.

[0013] Furthermore, the protective cover includes a front cover and a rear cover that are connected to each other. The front cover is located near the front end of the fan system, and the lateral width of the front cover is greater than the lateral width of the rear cover.

[0014] The drive unit is located inside the front cover, and the hinged link is located inside the rear cover.

[0015] Furthermore, the output connecting rod is a crank connecting rod.

[0016] Furthermore, the top surface of the protective cover is inclined from front to bottom.

[0017] Furthermore, the housing assembly includes a housing and a smoke collection hood. The smoke collection hood is installed at the rear end of the housing assembly. The air inlet is provided at the bottom of the smoke collection hood. A perforation is provided at the front of the bottom of the smoke collection hood for the output end of the smoke collection plate drive assembly to pass through.

[0018] Furthermore, the air inlet includes a main air inlet and an auxiliary air inlet;

[0019] The main air inlet is located in the middle of the smoke hood, and an auxiliary air inlet is provided on each side of the main air inlet;

[0020] An oil filter is installed at the main air inlet.

[0021] Furthermore, the perforations are located at both ends of the front side of the main air inlet.

[0022] The embodiments of this utility model have the following advantages or beneficial effects:

[0023] By utilizing the spatial layout characteristics of the fan system, the smoke collection plate drive assembly is positioned in the non-core airflow channel area at the bottom of the enclosure, avoiding interference with the mainstream airflow path. This ensures that the aerodynamic performance of the range hood remains unaffected, guaranteeing stable and efficient smoke extraction. Secondly, the symmetrical dual-side drive structure makes the movement of the smoke collection plates on both sides more synchronized and smooth, avoiding potential issues like uneven load or jamming in traditional single-side drive methods, thus improving drive response speed and operational reliability. Attached Figure Description

[0024] The above and other features and advantages of this invention will become more apparent from a detailed description of exemplary embodiments with reference to the accompanying drawings.

[0025] Figure 1 This is a first-view structural schematic diagram of a range hood according to an exemplary embodiment;

[0026] Figure 2 This is a second-view structural schematic diagram of a range hood according to an exemplary embodiment;

[0027] Figure 3 This is a third-view structural schematic diagram of a range hood according to an exemplary embodiment;

[0028] Figure 4 This is a fourth-view structural schematic diagram of a range hood according to an exemplary embodiment.

[0029] The reference numerals in the attached figures are explained as follows:

[0030] 1. Fan system; 2. Smoke collection plate drive assembly; 3. Protective cover; 4. Housing assembly; 5. Smoke collection plate assembly; 6. Smoke hood; 7. Oil screen; 8. Air inlet.

[0031] 11. Enclosure panel; 12. Impeller;

[0032] 31. Front cover; 32. Rear cover; 33. Top surface;

[0033] 81. Main air inlet; 82. Auxiliary air inlet. Detailed Implementation

[0034] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0035] The terms “a,” “one,” “the,” and “the” are used to indicate the existence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended meaning of inclusion and that other elements / components / etc. may exist in addition to the listed elements / components / etc.

[0036] Figure 1 This is a first-view structural schematic diagram of a range hood according to an exemplary embodiment; Figure 2 This is a second-view structural schematic diagram of a range hood according to an exemplary embodiment; Figure 3 This is a third-view structural schematic diagram of a range hood according to an exemplary embodiment; Figure 4 This is a fourth-view structural schematic diagram of a range hood according to an exemplary embodiment. The above schematic diagram is only for illustrating the structural relationships related to the inventive point and is not intended as an actual scale of a product.

[0037] like Figures 1 to 4 As shown in the figure, a range hood according to an embodiment of the present invention includes: a fan system 1, a housing assembly 4, a smoke collection plate assembly 5, and a smoke collection plate drive assembly 2. The housing assembly 4 is located below the fan system 1, and the top of the housing assembly 4 is connected to the bottom of the fan system 1. The bottom front side of the housing assembly 4 is located near the bottom of the fan system 1, and the bottom rear side of the housing assembly 4 has an air inlet 8. The smoke collection plate drive assembly 2 is respectively installed on the left and right front ends of the area between the bottom of the fan system 1 and the bottom of the housing assembly 4. The smoke collection plate assembly 5 is located at the air inlet 8, and the output end of the smoke collection plate drive assembly 2 is connected to the smoke collection plate assembly 5 to drive it to open / close the air inlet 8.

[0038] The outer casing assembly 4 is located below the fan system 1, and its top is connected to the bottom of the fan system 1 to form a complete airflow channel structure. The bottom front side of the outer casing assembly 4 is set close to the bottom of the fan system 1, making the overall shape more compact and meeting the design requirements of modern kitchens for thinness and aesthetics.

[0039] An air inlet 8 is provided at the bottom rear side of the outer casing assembly 4, serving as the main inlet for fume intake. The fume collection plate assembly 5 is located at the air inlet 8 and can open and close around its top pivot. When closed, it seals the air inlet 8; when open, it allows fumes to smoothly enter the fan system 1.

[0040] Two smoke-collecting plate drive assemblies 2 are respectively installed on the left and right front ends of the area between the bottom of the fan system 1 and the bottom of the outer casing assembly 4. This installation position avoids the main airflow channel inside the fan system 1, does not interfere with aerodynamic performance, and ensures smoke extraction efficiency. At the same time, symmetrically arranging the drive assemblies on the left and right front ends facilitates synchronous dual-side drive, improves the smoothness and response speed of the opening and closing action of the smoke-collecting plate assembly 5, and avoids the off-center load or jamming problems that may occur with single-side drive.

[0041] The output end of each smoke collection plate drive assembly 2 is connected to the front end of the back of the smoke collection plate assembly 5 through a linkage mechanism. Specifically, the rotational motion of the drive component (such as a motor) can be converted into the swinging motion of the smoke collection plate through the output linkage (such as a crank linkage), thereby realizing the opening and closing control of the air inlet 8.

[0042] This structural design makes full use of the space on both sides of the lower part of the fan system enclosure 11, integrating the drive components into the non-core air duct area. This effectively saves internal vertical space, helps reduce the overall height of the unit, and improves space utilization. At the same time, the drive components are located outside the air duct and biased towards the front, avoiding the main path of concentrated oil fume rise, reducing oil adhesion, and improving the durability and ease of maintenance of the equipment.

[0043] The fan system 1 mainly includes a enclosure 11 and an impeller 12.

[0044] The enclosure 11 is a basic support component, made of metal or high-strength plastic, and has good sealing and strength. The enclosure 11 is roughly box-shaped, with internal space for mounting the impeller 12 and drive motor. An air inlet 8 is located at the bottom of the enclosure 11, and an air outlet is located at the top or rear end. Air is drawn in through the air inlet 8, pressurized by the impeller 12, and discharged through the air outlet. The bottom end of the enclosure 11 (i.e., the air inlet 8) is connected to the outer casing assembly 4 of the range hood.

[0045] The impeller 12 is located in the central area inside the enclosure 11, between the air inlet 8 and the air outlet along the airflow direction, and is axially fixedly connected to a drive shaft.

[0046] Two smoke collection plate drive components 2 are fixedly connected to the left and right sides of the lower part of the enclosure 11, respectively.

[0047] By symmetrically installing the two smoke-collecting plate drive assemblies 2 on the left and right front ends of the lower part of the fan system 1 (i.e., enclosure 11), the space occupied in the height direction of the volute inside the casing is effectively reduced. In traditional range hoods, the drive mechanism is often concentrated in the middle below the air duct, requiring a large installation space at the bottom of the volute, which limits the compactness of the overall structure. In this solution, the drive assemblies are moved to the left and right front ends of the fan system 1, avoiding spatial conflict with the volute in the vertical direction. This reduces the overall structural height below the volute, which is conducive to achieving the design trend of a thinner and more compact overall shape, meeting the high requirements of modern kitchen appliances for aesthetics and space utilization.

[0048] Meanwhile, because the drive components are located away from the center of the air duct, they do not interfere with the main airflow channel, ensuring the uniformity and stability of the airflow distribution at the eight air inlets, thus maintaining high smoke extraction efficiency and static pressure performance. This arrangement, away from the center of the air duct, also helps reduce the noise propagation path caused by the vibration of mechanical components, further optimizing the quiet experience during use.

[0049] Furthermore, positioning the smoke collection plate drive assembly 2 at the lower left and right front ends of the fan system 1 provides excellent oil-resistant design. Traditional drive mechanisms and their connecting rods located directly below the duct are easily impacted by rising fumes, leading to severe oil buildup, affecting the lifespan of transmission components, and posing a risk of oil dripping. In this design, the drive assembly and connecting rods are located outside the duct and towards the front, avoiding the main path of concentrated rising fumes. This reduces the amount of fumes adhering to the drive components, lowering cleaning frequency and maintenance difficulty. Simultaneously, the connecting rod structure is away from the user's visible area, improving the product's overall appearance.

[0050] Finally, the two symmetrically arranged independent drive components can independently or synchronously control the opening and closing of the left and right smoke-gathering plates, which has a fast response speed and high control precision. This avoids transmission errors or jamming problems that may be caused by single-point drive, and improves the stability and reliability of equipment operation.

[0051] In this embodiment, the mounting structure of the smoke-collecting plate drive mechanism assembly 2 further includes two protective covers 3 for protecting the drive assembly. Each protective cover 3 corresponds to one smoke-collecting plate drive assembly 2, is installed on the lower inner side of the enclosure 11, and covers the corresponding drive assembly to achieve effective protection of the drive components.

[0052] The protective cover 3 is installed inside the enclosure 11, specifically in the lower left and right sides of the enclosure 11. It is attached to the inner wall of the enclosure 11 and fixedly connected by screws or clips. The protective cover 3, the enclosure 11, and the outer shell assembly 4 together form a closed chamber, which is isolated from the main space inside the enclosure 11 for airflow, forming an independent installation environment.

[0053] The smoke collection plate drive assembly 2 is completely housed within the chamber and effectively protected by the protective cover 3. This design prevents rising fumes, water vapor, and oil particles during cooking from directly entering the drive assembly, avoiding contamination and corrosion of the drive motor, reduction mechanism, and transmission components, thereby extending the service life of the drive assembly and improving the reliability of equipment operation.

[0054] A through-hole structure is provided at the corresponding position of the protective cover 3, allowing the output end (such as an output connecting rod or crank connecting rod) of the smoke-collecting plate drive assembly 2 to pass through it. After passing through the chamber wall, the output end extends to the outside and is hinged to the front end of the back of the smoke-collecting plate assembly 5 to realize power transmission. This through-hole structure ensures freedom of movement while maintaining the airtightness of the chamber as much as possible, further improving the protective effect.

[0055] By placing the smoke collection plate drive assembly 2 in an independent chamber formed by the protective cover 3, the enclosure 11, and the outer shell assembly 4, physical isolation between the drive component and the oil fume environment is achieved, significantly improving the product's oil resistance, electrical safety, and long-term stability.

[0056] The protective cover 3 is installed inside the enclosure 11, and the protective cover 3 forms a cavity that is isolated from the space inside the enclosure 11. The upper end of the smoke collection plate drive assembly is located inside the cavity.

[0057] Specifically, the protective cover 3 is made of metal or high-temperature resistant engineering plastic, possessing a certain degree of mechanical strength and oil resistance. Its overall shape is adapted to the shape of the smoke collection plate drive assembly 2, employing a split or integrated structural design for easy assembly and disassembly. The protective cover 3 is fixedly connected to a predetermined installation position inside the enclosure 11 via clips, screws, or adhesives, located on the outside and top of the drive assembly (the bottom of the protective cover 3 is open), effectively covering key components such as the drive motor, reduction mechanism, and transmission parts.

[0058] Furthermore, the protective cover 3 prevents oil fumes and dust from entering the drive assembly, thereby avoiding affecting the normal operation of the transmission components and extending their service life.

[0059] In addition, the protective cover 3 is also provided with through holes or cable trays to facilitate wiring, allowing the power lines and control lines of the drive motor to pass through and be connected to the control system, ensuring the reliability of the electrical connection without affecting the protective performance.

[0060] By installing the aforementioned protective cover 3, the influence of oil fume on the drive components can be effectively isolated, reducing oil adhesion and lowering maintenance frequency. Since each drive component is equipped with an independent protective cover 3, the drive components on both sides are structurally independent, facilitating individual inspection and replacement, and improving product maintainability.

[0061] In this embodiment, the smoke gathering plate drive assembly 2 includes a drive component and a linkage mechanism, which are used to achieve precise opening and closing control of the smoke gathering plate assembly 5.

[0062] The drive unit serves as the power source, specifically a small DC motor or stepper motor, and is installed within the cavity formed by the protective cover 3, with its output shaft extending outwards. The drive unit is equipped with a reduction mechanism to reduce the speed and increase the output torque, ensuring a smooth and reliable driving process and preventing jamming or step loss caused by instantaneous load changes.

[0063] A linkage mechanism is disposed between the driving component and the smoke-collecting plate assembly 5 to convert the rotational motion of the driving component into the reciprocating oscillating motion of the smoke-collecting plate assembly 5. The linkage mechanism includes a hinged link and an output link: one end of the hinged link is hinged to the output end of the driving component to receive the driving force; the other end is hinged to the output link to form a motion transmission chain.

[0064] The input end of the output link is connected to the hinge link, while its output end passes through the chamber wall formed by the protective cover 3 and the surrounding plate 11, extends outward, and is hinged to the front end of the back of the smoke collection plate assembly 5. When the drive unit is activated, its output shaft drives the hinge link to swing, thereby pushing or pulling the output link, causing the output end of the output link to reciprocate, ultimately driving the smoke collection plate assembly 5 to open or close around its top pivot.

[0065] The output connecting rod can adopt a crank-connecting rod structure, with its shape and length optimized to match the opening and closing angle range and movement trajectory of the smoke collector, ensuring smooth and interference-free operation. The hinge point between the hinged connecting rod and the output connecting rod uses wear-resistant materials or self-lubricating bearings to improve transmission efficiency and extend service life.

[0066] In this embodiment, the protective cover 3 includes a connected rear cover 32 and a front cover 31. This structure can better fit the outline of the smoke-collecting plate drive assembly 2 and achieve effective coverage and protection of the drive components.

[0067] Specifically, the front cover 31 is located on the side near the front end of the fan system 1, covering the front area of ​​the drive components, including the motor tail and key transmission components such as the reduction gear mechanism. The lateral width of the front cover 31 is greater than that of the rear cover 32, giving the entire protective cover 3 a shape that is larger at the front and smaller at the rear, thus creating a larger shielding area at the front and improving the overall protective effect. Due to the larger lateral width of the front cover 31, it not only provides more comprehensive shielding protection but also plays a role in guiding airflow, preventing oil fumes from directly impacting key parts of the drive components, reducing oil buildup, and lowering cleaning frequency and maintenance costs.

[0068] The rear cover 32 is located on the rear side of the drive assembly, mainly covering the hinged link, while leaving appropriate openings or clearance space to ensure that the output end of the hinged link can pass through smoothly and connect to the external smoke collection plate assembly 5.

[0069] The front cover 31 and the rear cover 32 are connected by means of snap-fit, plug-in, or integral molding, and a transition structure is provided at the connection to ensure the sealing and structural strength between the two. In a preferred embodiment, the front cover 31 and the rear cover 32 are integrally molded structures made of high-temperature resistant and oil-resistant engineering plastics, which have good mechanical properties and are easy to assemble.

[0070] Furthermore, the front cover 31 and the rear cover 32 are fitted against the lower inner wall of the enclosure 11 near the outer wall surface of the enclosure 11 and are fixed by screws or positioning slots.

[0071] In this embodiment, the protective cover 3 has an overall L-shaped structure, which is used to effectively shield and protect the smoke collection plate drive assembly 2 installed on the left and right sides of the lower part of the enclosure 11. The L-shaped structure consists of two interconnected front cover 31 and rear cover 32: one end is the short side part and the other end is the long side part, which are respectively attached to different wall surfaces inside the fan system 1.

[0072] Specifically, the short side of the L-shape is close to the front end of the fan system 1 and fits tightly against the inner wall surface of the front end of the enclosure 11, and is fixedly connected by means of clips, screws, or adhesives. This part mainly covers the rear area of ​​the drive components, such as the motor tail and key components such as the reduction mechanism, and plays a role in dustproofing, oil protection, and shock absorption protection.

[0073] The long side of the L-shape extends along the side of the enclosure 11, fitting snugly against the inner side wall of the enclosure 11 to effectively shield the rear and sides of the drive assembly. This part typically covers the area near the linkage mechanism or transmission output shaft, maximizing the protection range without affecting the output end of the drive assembly, preventing oil fumes from directly entering the drive assembly, thereby improving the stability and service life of the equipment.

[0074] The corners of the L-shaped protective cover 3 are equipped with reinforcing ribs or rounded transition structures to enhance the overall structural strength and avoid stress concentration.

[0075] Because the short side of the L-shaped protective cover 3 is fitted to the inner wall of the rear end of the fan system 1, and the long side is fitted to the inner wall of the side, the entire protective cover 3 can make full use of the space layout inside the enclosure 11 to achieve compact installation. This fitted structure not only improves the connection stability between the protective cover 3 and the enclosure 11, but also reduces the risk of loosening and falling off due to vibration, thus improving the reliability of the entire machine operation.

[0076] In this embodiment, the top surface 33 of the protective cover 3 adopts a structural design that slopes downward from front to back. This sloped design has significant advantages in terms of oil protection, oil drainage, and airflow guidance.

[0077] Specifically, the protective cover 3 completely covers the exterior of the smoke-collecting plate drive assembly 2. Its top surface is not horizontal, but rather slopes downwards from the front to the rear. That is, the top of the front end of the protective cover 3 is higher than the top of the rear end, forming a sloping surface with a certain angle. Preferably, this angle is 3° to 10°.

[0078] This inclined structure can be manufactured in one piece by molding or stamping, and is suitable for protective covers made of metal or engineering plastic materials. It has good processability and assembly adaptability.

[0079] Specifically, the housing assembly 4 includes a housing, a smoke hood 6 and an oil screen 7. The smoke hood 6 is installed at the rear end of the housing assembly 4. An air inlet 8 is provided at the bottom of the smoke hood 6. A perforation is provided at the front of the bottom of the smoke hood 6 for the output end of the smoke collection plate drive assembly 2 to pass through.

[0080] The outer casing forms the main structure of the entire unit and is made of sheet metal or high-strength engineering plastic, providing excellent sealing and structural strength. The top of the casing has a mounting interface that matches the bottom of the fan system 1, allowing for secure mounting of the fan system 1 and connection of the airflow channels.

[0081] The fan system 1 is installed in the top area of ​​the casing, and its bottom is fixedly connected to the casing. The fan system 1 includes core components such as the enclosure 11 and the impeller 12, and is responsible for generating negative pressure to draw in oil fumes and exhaust them outdoors.

[0082] The smoke hood 6 is detachably installed below the front end of the housing assembly 4 via clips, screws, or a suspension structure. Its shape is adapted to the oil fume flow path, guiding the oil fume flow to the fan system 1. The smoke hood 6 has perforations for the linkage mechanism to pass through and connect to the smoke collection plate assembly 5.

[0083] The oil filter 7 is located at the air inlet 8 of the fume hood 6. It is usually a multi-layer metal filter structure with good filtration performance and washability. The oil filter 7 is removable, which facilitates regular cleaning and maintains the efficient operation of the range hood.

[0084] In actual use, when the range hood is started, the drive motor of the fan system 1 drives the impeller 12 to rotate, creating a negative pressure zone at the air inlet 8, which draws in the kitchen fumes and exhausts them through the exhaust duct. At the same time, the control system controls the smoke collection plate drive mechanism to operate according to the user's operation instructions or sensor signals.

[0085] The two smoke-collecting plate drive assemblies 2 work synchronously, pushing or pulling the smoke-collecting plate assembly 5 through their respective linkage mechanisms, causing it to rotate around the top pivot to complete the opening or closing action. Because the drive assemblies are symmetrically arranged and installed close to the enclosure 11, the problem of off-center load caused by single-sided drive is avoided, improving the smoothness and synchronization of the operation.

[0086] In addition, the protective cover 3 covers the outside of the drive components, effectively isolating the oil fume environment, reducing oil adhesion, and improving the cleanliness and service life of the equipment. The reasonable cooperation between the fume collection hood 6 and the oil screen 7 not only improves the oil fume collection efficiency, but also protects the internal fan system 1.

[0087] In this embodiment, the air inlet 8 of the range hood is designed to include a main air inlet 81 and two auxiliary air inlets 82 to optimize the smoke intake path, improve smoke extraction efficiency and reduce oil adhesion.

[0088] The main air inlet 81 is located in the middle of the fume hood 6 and is the main channel for oil fume intake. An oil filter 7 is installed at the main air inlet 81 to intercept large oil particles and prevent them from entering the fan system 1. The oil filter 7 adopts a multi-layer metal filter structure, which has good filtration performance and is washable.

[0089] The auxiliary air inlets 82 are located on both sides of the main air inlet 81, near the left and right edges of the fume hood 6. The auxiliary air inlets 82 are designed to disperse some of the oil fume flow, reduce the burden on the main air inlet 81, and optimize the airflow distribution, making the entire oil fume extraction process more uniform and efficient.

[0090] By setting up a main air inlet 81 and an auxiliary air inlet 82, the range hood can simultaneously draw in cooking fumes from different directions, forming a more comprehensive capture area. Especially during peak cooking times or when stir-frying or other operations that generate a lot of fumes, the auxiliary air inlet 82 can effectively divert some of the fumes, preventing all the fumes from concentrating in the main air inlet 81 and causing excessively high local wind speeds and reduced suction efficiency. This multi-point intake design significantly improves overall smoke extraction efficiency, ensuring that the kitchen air remains fresh at all times.

[0091] The presence of the auxiliary air inlet 82 allows for a more even distribution of fumes, reducing the concentration of fumes at individual main air inlets 81 and thus lowering the rate of grease deposition on the surface of the oil filter 7. This not only helps extend the cleaning cycle of the oil filter 7 but also reduces the risk of clogging affecting the smoke extraction effect. Furthermore, the dispersed airflow path also helps reduce the amount of fumes adhering to the inner wall of the fume hood 6 and other components, further improving the ease of maintenance and service life of the equipment.

[0092] In this embodiment, the smoke hood 6 has two through holes for the output ends (such as connecting rods) of the smoke collection plate drive assembly 2 to pass through and connect to the smoke collection plate assembly 5, thereby controlling its opening and closing action. The position of these through holes was designed through extensive experimental verification and aerodynamic simulation analysis, and was finally determined to be located above the oil mesh 7 (i.e., the main air inlet 81), ensuring that the smoke extraction performance of the range hood under high load conditions is met, while effectively preventing oil dripping or hanging from the exposed part of the connecting rod.

[0093] Specifically, the perforations are located at both ends of the front side of the main air inlet 81. This layout allows transmission components such as connecting rods to avoid the main channels for rising fumes during operation, reducing the amount of oil residue caused by direct impact of fumes, thereby reducing cleaning frequency and maintenance difficulty.

[0094] By simulating a typical "stir-fry mode" in a laboratory environment—that is, an extreme cooking scenario with high oil fume emission and large air volume intake—comparative tests were conducted on the smoke extraction efficiency, airflow organization, and oil stain adhesion at different perforation positions. The results showed that placing the perforation above the oil mesh 7 improved the product's oil stain resistance.

[0095] In this embodiment of the invention, the term "multiple" refers to two or more, unless otherwise explicitly defined. The terms "install," "connect," and "fix" should be interpreted broadly. For example, "connect" can mean a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention based on the specific circumstances.

[0096] In the description of the embodiments of this utility model, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific direction or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0097] In this specification, the terms "an embodiment," "a preferred embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0098] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A range hood, characterized in that, include: The fan system (1), the housing assembly (4), the smoke collection plate assembly (5), and the smoke collection plate drive assembly (2) are provided. The housing assembly (4) is located below the fan system (1). The top of the housing assembly (4) is connected to the bottom of the fan system (1). The front side of the bottom of the housing assembly (4) is located close to the bottom of the fan system (1). The rear side of the bottom of the housing assembly (4) has an air inlet (8). The smoke collection plate drive assembly (2) is installed on the left and right front sides of the area between the bottom of the fan system (1) and the bottom of the housing assembly (4). The smoke collection plate assembly (5) is located at the air inlet (8). The output end of the smoke collection plate drive assembly (2) is connected to the smoke collection plate assembly (5) to drive it to open / close the air inlet (8).

2. A range hood according to claim 1, characterized in that, The fan system (1) includes a enclosure (11) and an impeller (12) disposed within the enclosure (11). The impeller (12) is located in the center of the enclosure (11) and is positioned between the air inlet (8) and the air outlet along the airflow direction; The two smoke-collecting plate drive assemblies (2) are respectively fixedly connected to the left and right sides of the lower part of the enclosure plate (11).

3. A range hood according to claim 2, characterized in that, It also includes two protective shields (3); The protective cover (3) is installed inside the enclosure (11). The protective cover (3), the enclosure (11) and the outer shell assembly (4) enclose a cavity that is isolated from the space inside the enclosure (11). The smoke-collecting plate drive assembly (2) is located inside the cavity. The output end of the smoke-collecting plate drive assembly (2) passes through the cavity and is connected to the front end of the back of the smoke-collecting plate assembly (5).

4. A range hood according to claim 3, characterized in that, The smoke-collecting plate drive assembly (2) includes a drive member and a linkage mechanism. The drive member drives the smoke-collecting plate assembly (5) to open and close through the linkage mechanism. The linkage mechanism includes a hinged link and an output link. The hinged link is connected between the output end of the drive member and the output link. The output end of the output link passes through the chamber and is connected to the front end of the back of the smoke-collecting plate assembly (5).

5. A range hood according to claim 4, characterized in that, The protective cover (3) includes a front cover (31) and a rear cover (32) that are connected to each other. The front cover (31) is located near the front end of the fan system (1), and the lateral width of the front cover (31) is greater than the lateral width of the rear cover (32). The drive unit is located inside the front cover (31), and the hinged link is located inside the rear cover (32).

6. A range hood according to claim 4, characterized in that, The output connecting rod is a crank connecting rod.

7. A range hood according to any one of claims 3 to 6, characterized in that, The top surface (33) of the protective cover (3) is inclined downward from front to back.

8. A range hood according to claim 1, characterized in that, The housing assembly (4) includes a housing and a smoke collection hood (6). The smoke collection hood (6) is installed at the rear end of the housing assembly (4). The air inlet (8) is provided at the bottom of the smoke collection hood (6). The front part of the bottom of the smoke collection hood (6) is provided with a through hole for the output end of the smoke collection plate drive assembly (2) to pass through.

9. A range hood according to claim 8, characterized in that, The air inlet (8) includes a main air inlet (81) and an auxiliary air inlet (82). The main air inlet (81) is located in the middle of the smoke hood (6), and an auxiliary air inlet (82) is provided on each side of the main air inlet (81). There is an oil mesh (7) at the main air inlet (81).

10. A range hood according to claim 9, characterized in that, The perforations are located at both ends of the front side of the main air inlet (81).

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