Air curtain device and range hood

Abstract

The utility model relates to a wisdom home appliance technical field especially, relate to a kind of wind screen device and range hood, and the wind screen device includes: main body, installation space is formed inside, the side of main body is provided with the air outlet that is communicated with installation space. The present application is rotated by driving assembly and angle adjusting member, the continuous adjustment of air outlet area is realized, so as to the covering range and airflow intensity of wind screen can be intelligently adjusted according to actual oil fume concentration. In low oil fume working condition, by increasing the air outlet area to reduce wind speed, both maintain the basic isolation effect, and significantly reduce energy consumption and operating noise;In high oil fume working condition, by reducing the air outlet area to improve wind speed, form concentrated, strong airflow barrier, effectively block the spread of oil fume. This adaptive adjustment mechanism ensures that the wind screen parameters are accurately matched with the actual demand, while ensuring the best oil fume isolation effect, achieving energy saving and noise reduction and overall improvement of user experience.

Description

Technical Field

[0001] This application relates to the field of smart home appliance technology, and more specifically, to an air curtain device and a range hood. Background Technology

[0002] Range hoods are indispensable equipment in modern kitchens. Their core function is to effectively remove cooking fumes, heat, and odors generated during cooking to maintain fresh and clean kitchen air. To further improve fume capture efficiency and prevent fumes from spreading during their ascent, some mid-to-high-end range hoods have incorporated air curtain technology. This technology creates a downward-blowing air barrier in front of the cookware, separating the cooking area from the cook and, to a certain extent, constraining and guiding the flow of fumes towards the range hood's air intake.

[0003] However, most range hoods on the market with air curtain functions have significant flaws in their air curtain structure. The air curtain angle and speed of the vast majority of products are fixed and cannot adaptively adjust according to the actual cooking intensity (such as from simmering soup to stir-frying). This fixed air curtain mode leads to unnecessary energy waste and continuous, unpleasant operating noise under low-smoke conditions (such as stewing and steaming); while under high-smoke conditions (such as stir-frying and deep-frying), the insufficient air curtain strength causes the airflow barrier to break through, failing to effectively prevent smoke from escaping and affecting the final smoke extraction effect. Utility Model Content

[0004] The purpose of this invention is to provide an air curtain device and a range hood to alleviate the technical problem of the contradiction between performance and comfort caused by the inability of the fixed air curtain structure in the prior art to adapt to different cooking conditions.

[0005] This utility model provides an air curtain device, comprising: The main body has an internal installation space, and an air outlet connected to the installation space is provided on one side of the main body. The air curtain generator is located in the installation space with its output end facing the air outlet. An angle adjustment component is rotatably mounted at the air outlet and connected to the output end of the drive assembly. The angle adjustment component is connected to the drive assembly, and the drive assembly drives the angle adjustment component to rotate in order to adjust the air outlet area.

[0006] In conjunction with the first aspect, the driver component is located in the installation space; the driver component includes: The drive motor is located in the installation space; The transmission link is rotatably connected at one end to the output end of the drive motor to follow the movement of the output end, and rotatably connected at the other end to the angle adjustment component.

[0007] In conjunction with the first aspect, a rotating shaft is installed inside the air outlet; One end of the transmission link is equipped with a drive shaft parallel to the rotating shaft; The angle adjustment components are rotatably connected to the rotating shaft and the drive shaft, respectively.

[0008] In conjunction with the first aspect, the end of the transmission connecting rod away from the angle adjusting component is provided with a rotating hole extending along its own length. The output end of the drive motor is a swing arm structure, and the swing end of the swing arm structure is rotatably located in the rotating hole and slides in fit with the rotating hole.

[0009] In conjunction with the first aspect, there are multiple rotating shafts, drive shafts, and angle adjustment components; Multiple rotating shafts are spaced apart inside the air outlet along the width of the air outlet, and the rotating shafts extend along the length of the air outlet. Multiple drive shafts and multiple rotating shafts are respectively set on the transmission connecting rod; Multiple angle adjustment components are connected to multiple drive shafts and multiple rotating shafts in a one-to-one correspondence.

[0010] Secondly, embodiments of this application also provide a smoke hood, including a casing, a fan, and an air curtain device as described above; An air intake is located at one end of the chassis; The air curtain device is located inside the chassis. The air outlet and air inlet of the air curtain device are on the same plane, and the air outlet of the air curtain device faces the side away from the air inlet. The fan is located inside the casing and above the air curtain device.

[0011] In conjunction with the second aspect, the range hood also includes: The air intake is located on the side wall of the chassis and is opposite to the air curtain device inside the chassis.

[0012] In conjunction with the second aspect, there are multiple air curtain devices arranged adjacent to each other.

[0013] In conjunction with the second aspect, the range hood also includes: The smoke sensor is located at the bottom of the chassis; The control unit is electrically connected to the smoke sensor and multiple air curtain devices.

[0014] In conjunction with the second aspect, the range hood also includes: The smoke guide is movably mounted on the chassis and located at the air intake. The smoke guide can move along the height of the chassis to adjust the air intake area of ​​the air intake.

[0015] Beneficial effects: This application provides an air curtain device and a smoke hood. The air curtain device includes: a main body with an installation space inside, and an air outlet connected to the installation space on one side of the main body; an air curtain generator disposed in the installation space with its output end facing the air outlet; and an angle adjustment member rotatably disposed at the air outlet and drivenly connected to the output end of a drive assembly. The angle adjustment member is connected to the drive assembly, and the drive assembly drives the angle adjustment member to rotate to adjust the air outlet area.

[0016] This application achieves continuous adjustment of the air outlet area by driving the angle adjustment component through a drive assembly. This allows for intelligent adjustment of the air curtain's coverage and airflow intensity based on the actual concentration of cooking fumes. Under low-fume conditions, increasing the air outlet area and reducing the air velocity maintains basic isolation while significantly reducing energy consumption and operating noise. Under high-fume conditions, decreasing the air outlet area and increasing the air velocity creates a concentrated and powerful airflow barrier, effectively blocking the spread of cooking fumes. This adaptive adjustment mechanism ensures precise matching of the air curtain parameters to actual needs, achieving optimal fume isolation while comprehensively improving energy efficiency, noise reduction, and user experience. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments of this application or 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 this utility model. 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 structure of the air curtain device provided in the embodiments of this application; Figure 2 A schematic diagram showing the connection between the drive assembly and the angle adjustment component in the air curtain device provided in the embodiments of this application; Figure 3 A schematic diagram of the external structure of the range hood provided in the embodiments of this application; Figure 4 This is a schematic diagram of the internal structure of the range hood provided in an embodiment of this application; Figure 5 This is a side view of the structure of the range hood provided in an embodiment of this application.

[0019] icon: 1-Main body, 11-Air outlet, 2-Air curtain generator, 21-Air curtain fan, 22-Air curtain motor, 3-Drive assembly, 31-Drive motor, 32-Transmission link, 4-Angle adjustment component, 5-Chassis, 51-Air intake, 52-Make-up air inlet, 6-Fan, 7-Smoke sensor, 8-Smoke guide component, 9-Baffle. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model 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 present 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 present invention without inventive effort are within the scope of protection of the present 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 utility model, 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 utility model is in use. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "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 utility model, 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 utility model based on the specific circumstances.

[0026] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0027] Firstly, embodiments of this application provide an air curtain device, combined with Figure 1 The air curtain device shown includes: a main body 1, an air curtain generating component 2, a driving component 3, and an angle adjusting component 4.

[0028] The main body 1 has an internal installation space, and an air outlet connected to the installation space is provided on one side of the main body 1.

[0029] Air curtain generator 2 is installed in the installation space with its output end facing the air outlet 11.

[0030] Angle adjustment component 4 is rotatably mounted on air outlet 11 and is connected to the output end of drive component 3.

[0031] The angle adjustment component 4 is connected to the drive assembly 3, and the drive assembly 3 drives the angle adjustment component 4 to rotate so as to adjust the air outlet area of ​​the air outlet 11.

[0032] The air curtain device provided in this application integrates the air curtain generator 2 and the angle adjustment component 4, which is rotatably disposed at the air outlet 11, into the main body 1. The angle adjustment component 4 is driven to rotate by the driving component 3, thereby continuously adjusting the air outlet area and airflow direction of the air outlet 11. In this way, the limitations of traditional fixed air curtains can be fundamentally overcome: by dynamically matching different working conditions, the angle can be widened and the wind speed reduced to achieve energy saving and noise reduction when there is low oil fume, and the angle can be narrowed and the airflow concentrated to improve isolation efficiency when there is high oil fume, significantly optimizing the oil fume capture effect. In addition, the highly integrated compact structure makes it easy to achieve complete concealment, perfectly combining functionality and aesthetics, and providing users with a more intelligent, efficient and quiet kitchen environment.

[0033] In this embodiment, the air curtain generator 2 is an air curtain fan. The air curtain fan 21 is connected to the air curtain motor 22. Driven by the air curtain motor 22, the air curtain fan 21 provides the power airflow required to generate the air curtain. The air curtain fan is usually a variable frequency fan, which can achieve stepless speed regulation of 3-12m / s.

[0034] In conjunction with the first aspect, the drive assembly 3 is located in the installation space and specifically includes: a drive motor 31 and a transmission link 32.

[0035] The drive motor 31 is located in the installation space.

[0036] One end of the transmission link 32 is rotatably connected to the output end of the drive motor 31 to follow the movement of the output end, and the other end is rotatably connected to the angle adjustment component 4.

[0037] Combination Figure 1, Figure 2 As shown, a drive motor 31 is fixedly installed within the mounting space of the main body 1. This fixed installation method ensures the stability of the drive motor 31 and avoids cable wear and fatigue that may occur due to the movement of moving parts. The drive motor 31, as a power source, is typically a stepper motor or servo motor that can precisely control the rotation angle and speed. The controller sends pulse signals to the drive motor 31 to command it to perform precise forward or reverse rotation.

[0038] The transmission link 32 is a rigid connecting rod with both ends rotatably connected (e.g., by a pin or ball joint bearing). One end is connected to the output end of the drive motor 31 (i.e., the motor shaft); the other end is connected to the connection point of the angle adjustment component 4 that needs to be adjusted.

[0039] Thus, when the drive motor 31 receives a control command and begins to rotate, its output acts as a "crank" to perform circular motion. This circular motion is transmitted through the transmission link 32 and forcibly converted into the pitch swing of the angle adjustment component 4 around its fixed axis, thereby realizing the intelligent angle adjustment function of the air curtain. The drive motor 31 is usually a stepper motor, which drives the angle adjustment component 4 to rotate, thereby making the tilt angle of the air outlet 11 of the air curtain device adjustable from 0° to 60°.

[0040] In conjunction with the first aspect, a rotating shaft is installed inside the air outlet 11.

[0041] One end of the transmission link 32 is provided with a drive shaft parallel to the rotating shaft.

[0042] Angle adjustment component 4 is rotatably connected to the rotating shaft and drive shaft respectively.

[0043] Understandably, a fixed pivot is installed inside the air outlet 11. This pivot serves as the reference for the movement of the angle adjustment component 4, and it is fixed to the main body 1 structure and cannot be moved.

[0044] At one end of the transmission link 32, there is a drive shaft parallel to the rotating shaft. This drive shaft is driven by the drive motor 31 through the transmission link 32, serving as a movable power input point.

[0045] The angle adjustment component 4 is connected to both shafts simultaneously. Specifically, it is rotatably connected to a fixed rotating shaft through a hole or bearing, allowing it to pitch freely around the rotating shaft. It is also rotatably connected to the drive shaft of the transmission link 32 through another connection point.

[0046] When the drive motor 31 pushes the transmission link 32 to move, the transmission link 32 pushes and pulls the connection point on the angle adjustment member 4 through its drive shaft, forcing the angle adjustment member 4 to rotate around the axis.

[0047] In conjunction with the first aspect, the end of the transmission connecting rod 32 furthest from the angle adjusting member 4 is provided with a rotating hole 321 extending along its own length direction (e.g., Figure 2 (As shown).

[0048] The output end of the drive motor 31 is a swing arm structure, and the swing end of the swing arm structure is rotatably located in the rotating hole and slides in cooperation with the rotating hole.

[0049] At the end of the transmission link 32 furthest from the angle adjusting member 4, a rotating hole extending along its length is provided. In this embodiment, the rotating hole is an elongated hole or a waist-shaped groove. The output end of the drive motor 31 is not directly connected, but is designed as a swing arm structure. The fixed end of the swing arm is connected to the motor shaft, and the swinging end of the swing arm is a pin, which is inserted into and nested within the aforementioned rotating hole 321.

[0050] When the drive motor 31 rotates, it drives the swing arm structure to perform a circular motion. The pin at the end of the swing arm simultaneously undergoes two movements within the rotating hole 321: rotation relative to the connecting rod and sliding along the length of the rotating hole. This combination of rotation and sliding forms a floating connection, which greatly improves the tolerance to assembly errors and thermal expansion and contraction of parts, effectively absorbing minor displacement deviations generated during movement and preventing the mechanism from jamming. The length of the rotating hole determines the dynamic range of the swing arm's effective working radius, allowing for a larger pitch angle adjustment range for the angle adjustment component 4 within a limited motor rotation angle; in other words, the same adjustment effect can be achieved with less motor torque.

[0051] In conjunction with the first aspect, there are multiple rotating shafts, drive shafts, and angle adjustment components 4.

[0052] Multiple rotating shafts are spaced apart within the air outlet 11 along the width direction of the air outlet 11, and the rotating shafts extend along the length direction of the air outlet 11.

[0053] Multiple drive shafts and multiple rotating shafts are respectively set on the transmission connecting rod 32.

[0054] Multiple angle adjustment components 4 are connected to multiple drive shafts and multiple rotating shafts in a one-to-one correspondence.

[0055] Understandably, within the air outlet 11, multiple parallel rotating shafts are spaced apart along its width (i.e., laterally). These rotating shafts collectively form a unified rotation axis reference for the entire angle adjustment component 4. Multiple drive shafts and transmission links correspond one-to-one with these rotating shafts, and multiple drive shafts are mounted on the transmission link 32. Each angle adjustment component 4 is independently mounted on a corresponding rotating shaft and simultaneously driven by a corresponding drive shaft.

[0056] Thus, for a long air outlet 11, if drive points are only set at both ends, the angle adjustment component 4 in the middle is prone to warping or deformation under force or movement, resulting in uneven airflow. This embodiment of the application divides the entire angle adjustment component 4 into multiple force-bearing zones by setting multiple support points (rotating shafts) and drive points (drive shafts) in the width direction, greatly enhancing the rigidity and stability of the entire moving part and ensuring that it remains straight even under airflow impact.

[0057] Furthermore, all angle adjustment components 4 are synchronously driven by one (or a few) drive motors 31 via the same or rigidly connected transmission link 32. This "one-drive-multiple" architecture ensures a high degree of synchronization in the movement of all guide plate sections, avoiding jamming or internal stress caused by asynchrony, thereby achieving consistency and precision in the air outlet angle of the entire air curtain.

[0058] Secondly, embodiments of this application also provide a range hood. Combined with... Figure 3 , Figure 4 , Figure 5 As shown, the smoke machine includes a casing 5, a fan 6, and an air curtain device as described above.

[0059] An air intake 51 is provided at one end of the chassis 5.

[0060] The air curtain device is located inside the chassis 5. The air outlet 11 and the air inlet 51 of the air curtain device are located on the same plane, and the air outlet 11 of the air curtain device faces the side away from the air inlet 51.

[0061] The fan 6 is located inside the casing 5 and above the air curtain device.

[0062] The casing 5, serving as a supporting structure, is specifically designed to be fully embedded within standard kitchen wall cabinets. This means that its dimensions and mounting method are compatible with standard cabinets. When the range hood is not in operation, the casing 5, along with its supporting air curtain device and fan 6, can be completely concealed within the wall cabinets. From an external viewpoint, no components are obtrusively exposed, achieving a high degree of consistency with the kitchen's décor and ensuring a clean and aesthetically pleasing space.

[0063] The air intake 51 at the bottom of the casing 5 is the final inlet for the oil fumes to be drawn in, replacing the large smoke collection chamber of the traditional range hood. The fan 6 is located inside the casing 5 and above the air curtain device, which forms a vertical airflow lifting channel.

[0064] The air curtain device is built into the housing 5, but its air outlet 11 and air inlet 51 are located on the same plane (in the example above, both the air outlet 11 and the air inlet are located on the bottom plane of the housing 5). Most importantly, the air outlet 11 of the air curtain device faces away from the air inlet 51, that is, the airflow of the air curtain blows forward (towards the cook or the cooking area where the cook is located), while the air inlet is responsible for drawing air backward.

[0065] The air curtain device activates, blowing a uniform air barrier (air curtain) diagonally downwards and forwards. The area between the air curtain outlet 11 and the intake vent 51 forms a localized low-pressure zone (negative pressure zone). This air curtain first encounters the rising fumes, confining them to a specific area in front of the stove and partially altering their direction of motion. Simultaneously, the overhead fan 6 generates strong suction at the intake vent 51. Through the combined action of these two forces, the fumes confined by the air curtain and the surrounding air are naturally guided and "pulled" towards the intake vent 51, ultimately captured by the overhead fan 6 and discharged vertically upwards outdoors. In short, the air curtain blows forward to confine and block the fumes, generates negative pressure backwards to draw and guide them, and utilizes the fan upwards for final exhaust. Figure 3 The middle arrow indicates the direction of airflow.

[0066] In conjunction with the second aspect, the range hood also includes: air inlet 52.

[0067] The air intake vent 52 is located on the side wall of the chassis 5 and is opposite to the air curtain device inside the chassis 5.

[0068] When the air curtain device is working, the airflow it creates forms a negative pressure zone behind it (on the side closer to the inside of the range hood). The air supply vent 52 faces the space behind or to the side rear of the side where the air curtain device is located inside the casing 5. When the upper fan 6 and the front air curtain device are working simultaneously, they are both "drawing" air from inside the casing 5, which creates a strong negative pressure zone inside the casing 5. Understandably, without any air supply measures, the negative pressure will cause the fan to consume more power to counteract this negative pressure, resulting in increased energy consumption, decreased efficiency, and increased noise. In this embodiment, the air supply vent 52 acts as a pre-set channel, actively drawing air from the kitchen environment or outdoors to directly "replenish" the negative pressure zone inside the casing. The replenished air mixes with the oil fumes constrained by the air curtain device, making them easier for the fan 6 to capture; on the other hand, it avoids the formation of excessive negative pressure in the kitchen due to exhaust, which would affect the normal operation of other gas appliances and reduce the ineffective loss of "suction". The fan 6 is the core component of the range hood, responsible for generating the exhaust power and ultimately venting the fumes outdoors. The fan 6 is located inside the casing 5, above the air curtain device, creating a smooth airflow path from bottom to top: the airflow generated by the air curtain device first forms an isolation barrier in front of the cookware to envelop the fumes; then, as this airflow carrying the fumes moves backward, it mixes thoroughly with the air introduced from the air intake vent 52; next, the mixed gas is effectively drawn in by the fan 6 located above; finally, all the gas is uniformly exhausted outdoors.

[0069] In this embodiment, air is supplied through the air inlet 52, thereby quickly balancing the internal pressure and significantly reducing the workload of the fan 6 and the air curtain fan 21. Under the same effect, lower power operation can be achieved. In addition, stable air supply ensures that the air curtain fan 21 can obtain a sufficient air source, thereby generating a uniform, stable, and non-fracture-resistant air curtain airflow, ensuring its reliability as an isolation barrier.

[0070] In conjunction with the second aspect, there are multiple air curtain devices arranged adjacent to each other.

[0071] Understandably, multiple air curtain devices can also be integrated within chassis 5. These air curtain devices are arranged adjacently, collectively covering the width of the entire cooking area. For example, there could be two independent air curtain devices, one for the left and one for the right, corresponding to the left and right cooking areas respectively. Figure 1 As shown, the two independent air curtain devices enable the range hood to flexibly cope with the complex scenario of using two cooking areas at the same time, and can achieve a targeted oil fume capture effect.

[0072] In conjunction with the second aspect, the range hood also includes: Smoke sensor 7 is located at the bottom of chassis 5; The control unit is electrically connected to the smoke sensor 7 and multiple air curtain devices.

[0073] like Figure 3 As shown, the smoke sensor 7 is located at the bottom of the chassis 5, which is closest to the cooking area, so as to collect the oil fume concentration signal generated during cooking in real time and accurately. Then, the collected oil fume concentration signal is sent to the control unit. The program inside the control unit executes algorithms such as threshold comparison, working condition judgment, and mode mapping according to the received signal. Finally, the control unit generates and outputs precise control commands to drive the action of each air curtain device independently or in concert (such as adjusting the angle and wind speed).

[0074] There are multiple smoke sensors 7; the multiple smoke sensors 7 are evenly distributed on the baffles 9 extending to both sides at the bottom of the chassis.

[0075] In this embodiment, the bottom of the chassis 5 is provided with baffles 9 extending to both sides. Smoke sensors 7 are evenly distributed on the two baffles 9, corresponding to the two cooking areas respectively. The smoke sensors 7 on the left and right sides can independently collect the oil fume concentration data of the cooking area directly below them. When only one cooking area is performing cooking, the control unit can accurately determine whether the oil fume comes from the left or right side by comparing the data on both sides, that is, determine the "target cooking area", and then determine the corresponding target air curtain device. Thus, distributed sensing provides key spatial location information, making subsequent precise zoning control decisions possible. Usually there are two cooking areas, so in this embodiment, the number of air curtain devices and smoke sensors 7 is two, corresponding to the two cooking areas respectively.

[0076] In conjunction with the second aspect, the range hood also includes: smoke guide components 8.

[0077] The smoke guide 8 is movably mounted on the chassis 5 and located at the air intake 51. The smoke guide 8 can move along the height of the chassis 5 to adjust the air intake area of ​​the air intake 51.

[0078] The smoke guide 8 is a block or a set of retractable baffles, movably mounted in the housing 5 and located at the air intake 51. When the smoke guide 8 moves downward, it extends out of the housing 5, thereby reducing the open area of ​​the air intake 51; when the smoke guide 8 moves upward and retracts into the housing, the open area of ​​the air intake 51 is restored or enlarged. In the non-working state, the smoke guide 8 can be fully raised and retracted, completely closing the air intake 51 or maintaining a minimal opening, achieving a neat and concealed appearance.

[0079] Understandably, the motor corresponding to the smoke guide 8 is connected to the control unit. The control unit can control the raising and lowering of the smoke guide 8 simultaneously with the air curtain device, based on the real-time oil fume concentration (operating conditions) or a preset program. For example, under low oil fume conditions, the smoke guide 8 partially lowers to reduce the suction area. Since the required exhaust volume is small at this time, the smaller suction port 51 can maintain or even enhance the local wind speed while reducing the total exhaust volume, thereby achieving energy saving and noise reduction. Under high oil fume conditions, the smoke guide 8 rises completely to maximize the suction area, accommodating the large amount of oil fume constrained and guided by the air curtain device with the largest possible open surface, ensuring that it can be quickly and completely sucked in, preventing oil fume from escaping due to insufficient suction port 51 area.

[0080] Combination Figure 5 As shown, the smoke guide 8 includes a first part 81 and a second part 82 that are perpendicular to each other, and a third part 83 for connecting the first part 81 and the second part 82. It can be understood that the first part 81 and the second part 82, which are perpendicular to each other, form an L-shaped main structure, and the third part 83 provides a reinforced connection, constituting a stable triangular support system. This effectively enhances the overall structural rigidity of the smoke guide 8 and prevents deformation during lifting and lowering. The first part is slidably connected to the inner wall of the casing 5. When the smoke guide 8 is driven to descend, the second part is parallel to the plane of the air intake 51, allowing the second part 82 to effectively change the airflow field at the air intake 51, achieving precise adjustment of the suction area and optimizing the path for collecting oil fumes.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model 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 therein. Such 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 this utility model.

Claims

1. An air curtain device, characterized in that, include: The main body has an internal installation space, and an air outlet connected to the installation space is provided on one side of the main body; An air curtain generator is located in the installation space and its output end faces the air outlet. An angle adjustment component is rotatably mounted at the air outlet and is connected to the output end of the drive assembly for transmission. The angle adjustment component is connected to the drive assembly, and the drive assembly drives the angle adjustment component to rotate in order to adjust the air outlet area.

2. The air curtain device according to claim 1, characterized in that, The drive component is disposed in the installation space, and the drive component includes: A drive motor is located in the installation space; The transmission link is rotatably connected at one end to the output end of the drive motor to move with the output end, and rotatably connected at the other end to the angle adjustment component.

3. The air curtain device according to claim 2, characterized in that, A rotating shaft is installed inside the air outlet; One end of the transmission link is provided with a drive shaft parallel to the rotating shaft; The angle adjustment component is rotatably connected to the rotating shaft and the drive shaft, respectively.

4. The air curtain device according to claim 3, characterized in that, The end of the transmission link away from the angle adjustment member is provided with a rotating hole extending along its own length. The output end of the drive motor is a swing arm structure, and the swing end of the swing arm structure is rotatably disposed in the rotating hole and slides in cooperation with the rotating hole.

5. The air curtain device according to claim 3, characterized in that, There are multiple of the rotating shaft, the drive shaft, and the angle adjustment component; Multiple rotating shafts are spaced apart within the air outlet along the width direction of the air outlet, and the rotating shafts extend along the length direction of the air outlet; Multiple drive shafts and multiple rotating shafts are respectively arranged on the transmission connecting rod; The multiple angle adjustment components are connected one-to-one with the multiple drive shafts and the multiple rotating shafts.

6. A range hood, characterized in that, Includes a chassis, a fan, and an air curtain device as described in any one of claims 1-5; An air intake is provided at one end of the chassis; The air curtain device is installed inside the chassis. The air outlet of the air curtain device and the air inlet are located on the same plane, and the air outlet of the air curtain device faces the side away from the air inlet. The fan is located inside the casing and above the air curtain device.

7. The range hood according to claim 6, characterized in that, The range hood also includes: The air intake is located on the side wall of the chassis and is opposite to the air curtain device inside the chassis.

8. The smoke hood according to claim 7, characterized in that, There are multiple air curtain devices arranged adjacent to each other.

9. The range hood according to claim 7, characterized in that, The range hood also includes: The smoke sensor is located at the bottom of the chassis; The control unit is electrically connected to the smoke sensor and the multiple air curtain devices, respectively.

10. The range hood according to claim 6, characterized in that, The range hood also includes: A smoke guide is movably mounted on the chassis and located at the air intake. The smoke guide can move along the height of the chassis to adjust the air intake area of ​​the air intake.

Images