Range hood

Abstract

This invention relates to the field of range hood technology, specifically providing a range hood designed to solve the problems of existing range hoods having a small range of adjustable suction inlets and being unable to simultaneously meet the needs of high-level storage and low-level strong suction. To this end, the range hood provided by this invention includes: a main housing with a fan inside; a smoke collection chamber, which is designed to be raised and lowered relative to the main housing, and has a top suction inlet; a side suction chamber, which is designed to be raised and lowered relative to the smoke collection chamber or the main housing, and has a side suction inlet facing the cooktop; the side suction chamber opens or closes its side suction inlet by raising and lowering relative to the smoke collection chamber; and a smoke gathering plate, which is rotatably mounted at the top suction inlet for opening and closing the top suction inlet. The range hood provided by this invention, by configuring a raiseable smoke collection chamber and a side suction chamber, achieves dual-stage lifting, which helps to maximize the suction efficiency of the range hood while maintaining a high-level storage for aesthetic purposes, and is also adaptable to various cooking scenarios.

Description

Technical Field

[0001] This invention relates to the field of range hood technology, and specifically provides a range hood. Background Technology

[0002] Currently, most lift-type range hoods on the market use a single-stage lifting structure, meaning only the entire casing or only the smoke inlet is raised or lowered. This one-dimensional adjustment method has inherent limitations in its lifting stroke and adjustment range. When users need to save kitchen space and maintain the overall aesthetics of the kitchen, they often need to raise the smoke extraction unit to a higher position. At this point, the distance between the smoke inlet and the stove and cookware is too far, making it difficult for the effective negative pressure zone for capturing fumes to cover the diffused fumes. This is especially true when dealing with scenarios that generate a lot of fumes, such as stir-frying, where the extraction efficiency drops significantly. Conversely, if the smoke extraction unit is kept in a lower position for a long time in pursuit of efficient extraction, it will occupy the operating space above the stove, hindering the user's cooking activities and affecting the aesthetics. Therefore, the traditional single-stage lifting structure struggles to achieve a good balance between the two core user needs of "compact storage at a high position" and "powerful smoke extraction at a low position," lacking sufficient flexibility and adaptability in adjustment.

[0003] To address the aforementioned issues, some existing technologies employ a dual-lifting structure, such as using two independent drive units to control the lifting of different smoking components. While this design increases the adjustment options to some extent, it also introduces new problems. The adoption of dual motors or dual drive systems directly leads to increased product structure complexity, higher production costs, and increased control system complexity. When multiple drive units work together, higher demands are placed on control logic and reliability; a failure in any drive unit can affect overall functionality, thereby increasing the system's potential failure rate and maintenance costs.

[0004] Furthermore, the structure of the smoke inlet in existing range hoods is relatively fixed. For example, the top suction inlet of a top-mounted range hood is usually in a normally open state, and its smoke collection range is relatively fixed in the horizontal direction. When the smoke extraction component is at different heights, there is a lack of dynamic optimization methods for the airflow field near the smoke inlet, making it impossible to actively adjust the air intake method according to the lifting and lowering state to form a more effective negative pressure smoke collection zone. This also restricts further improvement in the efficiency of smoke extraction. Summary of the Invention

[0005] The present invention aims to solve the above-mentioned technical problems, namely, to solve the problem that the existing range hoods have a small range of adjustment for the lifting of the smoke inlet and cannot meet the needs of both high-position storage and low-position strong suction.

[0006] This invention provides a range hood, the range hood comprising:

[0007] The main casing contains a fan.

[0008] The smoke collection chamber is configured to be able to rise and fall relative to the main box, and the smoke collection chamber has a top suction port;

[0009] A side suction cavity is provided in the smoke collection cavity or the main box in a manner that allows it to be raised and lowered relative to the smoke collection cavity. The side suction cavity forms a side suction port facing the stove side. The side suction cavity opens or closes the side suction port by raising and lowering it relative to the smoke collection cavity.

[0010] A smoke-collecting plate, which is rotatably mounted at the top suction port, is used to open and close the top suction port.

[0011] In some feasible embodiments of the above-mentioned range hood, the range hood further includes:

[0012] The drive system includes a lifting drive mechanism, which drives the side suction cavity to move up and down synchronously with the smoke collection cavity, enabling the side suction cavity to switch between two states: retracted into the smoke collection cavity and extended from the smoke collection cavity. In the retracted state, the side suction port is closed, and in the extended state, the side suction port is open.

[0013] In some feasible embodiments of the above-mentioned range hood, the drive system further includes:

[0014] A smoke-collecting plate driving mechanism, connected to the smoke-collecting plate, is used to drive the smoke-collecting plate to open and close; or

[0015] A flipping transmission mechanism is connected to the main box, the smoke collection chamber, and the smoke gathering plate, so that the smoke gathering plate flips under the driving force of the lifting and lowering movement of the smoke collection chamber.

[0016] In some feasible embodiments of the above-mentioned range hood, the air intake cross-sectional area of ​​the side suction port is larger than that of the top suction port.

[0017] In some feasible embodiments of the above-mentioned range hood, the ratio of the air intake cross-sectional area of ​​the side suction port to the air intake cross-sectional area of ​​the top suction port is 7:3.

[0018] In some feasible embodiments of the above-mentioned range hood, the range hood further includes a light component, which is disposed on one side of the smoke-gathering plate and projects light towards the other side of the smoke-gathering plate.

[0019] In some feasible embodiments of the above-mentioned range hood, the light component includes a trim strip and a strip light installed within the trim strip, the strip light projecting light to the other side along a direction penetrating the smoke-collecting plate.

[0020] In some feasible embodiments of the above-mentioned range hood, the smoke collection chamber is provided with side reinforcing beams on the inner sides of the two side walls at both ends of its length direction. The bottom of the side reinforcing beam has a U-shaped groove that folds towards the side wall of the main box. The U-shaped groove is located directly below the side wall of the main box and the side wall of the smoke collection chamber and is inclined towards the back side of the smoke collection chamber to receive the condensed oil dripping from above.

[0021] In some feasible embodiments, the smoke collection chamber includes a smoke hood facing the cooking area, and a central reinforcing beam is also provided inside the smoke collection chamber. The central reinforcing beam connects the two side reinforcing beams and can guide the condensed oil flowing out of the U-shaped groove to the smoke hood located below the central reinforcing beam. The smoke collection chamber also includes an annular oil collection groove arranged around the side suction chamber. The condensed oil collected by the smoke hood can be guided into the annular oil collection groove. The annular oil collection groove communicates with an oil cup located at the bottom of the side suction chamber on the back of the side suction chamber.

[0022] In some feasible implementations, the fan has a rearward-opening main smoke inlet and a front-opening auxiliary smoke inlet, and the smoke collection chamber is constructed with a main smoke path and an auxiliary smoke path. The main smoke inlet corresponds to the main smoke path, and the auxiliary smoke inlet corresponds to the auxiliary smoke path, so that the oil fumes drawn in from the top suction port and / or the side suction port can be discharged from the main smoke path and the auxiliary smoke path.

[0023] In some feasible implementations, the smoke collection chamber includes a smoke hood facing the cooking area, and the smoke hood is equipped with an image recognition module.

[0024] In some feasible implementations, the side of the fume hood facing away from the cooking area is provided with a lamp holder for fixing a lighting lamp, and the image recognition module is detachably connected to the lamp holder.

[0025] In some feasible implementations, the range hood further includes a protective component that covers the outside of the image recognition module and is located on the side of the smoke collection hood facing away from the cooking area. The protective component has an access port located on the side of the protective component facing the front panel bracket of the range hood.

[0026] In some feasible implementations, the range hood also includes a gesture light module, which is snapped onto a bracket below the front panel of the smoke collection chamber.

[0027] The beneficial effects of this invention are:

[0028] The technical solution provided by this invention forms a two-stage lifting mechanism consisting of a main box, a smoke collection chamber, and a side suction chamber, and integrates a flip-up smoke gathering plate, structurally breaking through the adjustment bottleneck of traditional single-stage lifting. Its core lies in achieving dynamic spatial coverage of the smoke inlet: in the retracted state, the side suction chamber is completely retracted into the smoke collection chamber, tightly attached to the main box, achieving minimal space occupation; in the working state, the smoke collection chamber and the side suction chamber descend synchronously, with the side suction chamber descending at a greater speed than the smoke collection chamber. The side suction chamber gradually extends from the smoke collection chamber, causing the side suction inlet to gradually open until it descends to a position close to the stovetop, forming a low-position side suction area. Combined with the negative pressure area formed by the opened smoke gathering plate, the range hood can adaptively adjust the height and combination of the smoke inlet according to the actual oil fume concentration and diffusion stage, thus achieving a structural balance between compact storage and efficient smoke extraction. Attached Figure Description

[0029] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0030] Figure 1 This is a structural schematic diagram of a range hood in its stowed state according to one embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the structure of a range hood in operation according to one embodiment of the present invention;

[0032] Figure 3 yes Figure 2 A diagram from another perspective;

[0033] Figure 4 This is a schematic diagram of the optical component of the present invention mounted on the smoke collection plate;

[0034] Figure 5 This is one of the schematic diagrams of the oil circuit structure of the present invention;

[0035] Figure 6 This is the second schematic diagram of the oil circuit structure of the present invention;

[0036] Figure 7 This is a schematic diagram of the main smoke path structure of the present invention;

[0037] Figure 8 This is a schematic diagram of the auxiliary smoke path structure of the present invention;

[0038] Figure 9 This is a schematic diagram of the internal structure of the smoke collection chamber of the present invention, which shows the image recognition module;

[0039] Figure 10 This is a schematic diagram of the transmission device of the present invention;

[0040] Figure 11 This is a cross-sectional schematic diagram of the transmission device of the present invention;

[0041] Figure 12 This is a schematic diagram of the guiding device of the present invention;

[0042] Figure 13 This is a schematic diagram of the flip transmission mechanism of the present invention when the range hood is in the storage state;

[0043] Figure 14 This is a schematic diagram of the flip transmission mechanism of the present invention when the range hood is in working condition;

[0044] Figure 15 yes Figure 14 A diagram from another perspective.

[0045] List of reference numerals in the attached diagram:

[0046] 1. Main housing; 11. Fan; 111. Main smoke inlet; 112. Auxiliary smoke inlet; 12. Main housing back panel; 2. Smoke collection chamber; 201. Top suction port; 202. Front panel; 203. Side reinforcing beam; 2031. U-shaped groove; 204. Middle reinforcing beam; 205. Smoke hood; 206. Annular oil collection groove; 207. Protective plate; 2071. Inspection port; 208. Lamp bracket; 209. Protective cover; 210. Crossbeam; 211. Crossbeam connector; 3. Side suction chamber; 31. Side suction port; 311. First side suction port; 312. Second side suction port; 32. Oil cup; 33. Side suction chamber back panel; 4. Smoke collection plate; 41. Linkage mechanism; 5. Light assembly; 51. Trim strip; 52. Strip light; 6. Gesture light module; 7. Image recognition module; 8. Guiding device; 8 1. Rear outer angle iron; 82. Rear middle angle iron; 83. Rear inner angle iron; 84. Front outer angle iron; 85. Front inner angle iron; 86. First slide rail; 87. Second slide rail; 88. Third slide rail; 9. Transmission device; 901. Limit nut; 902. Limit bearing; 903. Bearing seat; 904. Inner lead screw; 905. Inner nut seat; 906. Inner lead screw nut; 907. Connecting bearing; 908. Inner lead screw sleeve; 909. Outer lead screw; 910. First connecting piece; 911. Second connecting piece; 912. Outer lead screw nut; 913. Outer lead screw sleeve; 914. Third connecting piece; 10. Tilting transmission mechanism; 101. First connecting rod; 102. Second connecting rod; 103. Third connecting rod; 104. Fourth connecting rod; 105. Fifth connecting rod; 106. Swing arm. Detailed Implementation

[0047] The range hood of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and do not constitute a limitation thereof.

[0048] like Figures 1 to 12As shown, the core of the range hood provided by this invention lies in constructing a two-stage lifting mechanism consisting of a main chamber 1, a smoke collection chamber 2, and a side suction chamber 3, and integrating a flip-up smoke collection plate 4. This structurally breaks through the adjustment bottleneck of traditional single-stage lifting, achieving dynamic spatial coverage of the smoke inlet, thus achieving a structural balance between compact storage and efficient smoke extraction. The following will elaborate on its specific implementation method based on this core architecture.

[0049] Specifically, such as Figure 1 , Figure 2 and Figure 7 As shown, the main housing 1 serves as the installation foundation and power core of the entire unit. A fan 11 is fixedly installed inside, providing power for the fume extraction. The main housing 1 can be fixed to the kitchen wall via a rear bracket, ensuring the stability of the entire unit's installation. The smoke collection chamber 2 is designed to be adjustable in height relative to the main housing 1, specifically through a lifting drive mechanism that achieves a sliding connection with the main housing 1.

[0050] Combination Figures 3 to 7 As shown, a top suction port 201 is formed on the side of the smoke collection chamber 2 facing the stove. The top suction port 201 extends along the length of the smoke collection chamber 2 to form a strip-shaped opening. Specifically, it is formed by the smoke gathering hood 205 inside the smoke collection chamber 2 and the bracket surrounding the side suction chamber 3. The top suction port 201 is tilted upward toward the front panel 202. It works with the smoke gathering hood 205 and the smoke gathering plate 4 to collect the oil fumes that rise to a high position.

[0051] The range hood of the present invention also includes a drive system, which is used to drive the smoke collection chamber 2 and the side suction chamber 3 to rise and fall synchronously, and to drive the smoke gathering plate 4 to flip. Specifically, the drive system includes a lifting drive mechanism and a smoke gathering plate drive mechanism. The lifting drive mechanism is used to drive the smoke collection chamber 2 and the side suction chamber 3 to rise and fall synchronously, and the smoke gathering plate drive mechanism is used to independently drive the smoke gathering plate to flip to open and close the top suction port. In addition, the drive system may also include a lifting drive mechanism and a flipping transmission mechanism, which enables the smoke gathering plate to flip under the driving force of the rising and falling movement of the smoke collection chamber.

[0052] Combination Figures 10-12 As shown, the side suction chamber 3 is installed inside the smoke collection chamber 2 in a way that allows it to be raised and lowered relative to the smoke collection chamber 2, and can freely switch between the retracted state and the extended state.

[0053] To achieve a two-stage lifting function, this embodiment provides a lifting drive mechanism. This lifting drive mechanism includes a drive device (not shown), a transmission device 9, and a guide device 8. The drive device includes a drive motor (not shown), the output shaft of which is connected to the input end of the transmission device 9. The output end of the transmission device 9 is connected to the smoke collection chamber 2 and the side suction chamber 3, respectively. In this embodiment, the drive motor is fixedly connected to the inside of the main housing back plate 12 or the inside of the top plate of the main housing 1. The transmission device 9 employs a two-stage screw-nut mechanism to distribute and transmit the power of a single motor to the smoke collection chamber 2 and the side suction chamber 3.

[0054] Specifically, such as Figure 10 and Figure 11 As shown, the transmission device 9 includes a primary screw and nut mechanism and a secondary screw and nut mechanism. The primary screw and nut mechanism connects the main housing 1 and the smoke collection chamber 2, and the secondary screw and nut mechanism connects the primary screw and nut mechanism and the side suction chamber 3. The primary screw and nut mechanism includes an inner screw 904, an inner screw nut 906, and an inner screw sleeve 908. The inner screw 904 is rotatably connected to the output shaft of the drive motor via a limit nut 901, a limit bearing 902, and a bearing seat 903. If the output shaft of the drive motor is horizontally positioned, power can also be converted into rotation of the inner screw 904 (vertically positioned) via a bevel gear transmission mechanism.

[0055] like Figure 11 As shown, an inner screw nut 906 is screwed onto the outer side of the inner screw 904. The inner screw nut 906 is fixedly installed inside the inner nut seat 905. The inner nut seat 905 is fixedly connected to the top of the inner screw sleeve 908. The inner screw sleeve 908 is fixedly connected to the first connecting member 910 (interference fit). The first connecting member 910 and the second connecting member 911 are fixedly connected by fasteners. The second connecting member 911 is fixedly connected to the crossbeam connecting member 211 by fasteners. The crossbeam connecting member 211 is fastened to the crossbeam, thereby realizing the fixed connection between the inner screw sleeve 908 and the crossbeam. In this way, when the drive motor starts, it can drive the inner screw 904 to rotate around its axis. Since the inner screw nut 906 cooperates with the inner screw 904, and the inner screw nut 906 is relatively fixed on the inner screw sleeve 908, and the inner screw sleeve 908 is relatively fixed on the crossbeam, the inner screw nut 906 can move up and down in the vertical direction under the drive of the inner screw 904, thereby driving the smoke collection chamber to rise and fall relative to the main box.

[0056] Continue to refer to Figure 10 and Figure 11The secondary lead screw and nut mechanism includes an outer lead screw 909, an outer lead screw nut 912, and an outer lead screw sleeve 913. Specifically, the outer lead screw 909 is a hollow structure, sleeved on the outside of the inner lead screw 904, with a gap between them and connected by a spline, so that when the inner lead screw 904 rotates, it drives the outer lead screw 909 to rotate synchronously. The top of the outer lead screw 909 is rotatably connected to the inner wall of the inner lead screw sleeve 908 through a connecting bearing 907. When the inner lead screw sleeve 908 is fixed, when the inner lead screw 904 drives the outer lead screw 909 to rotate, the outer lead screw 909 can rotate relative to the inner lead screw sleeve 908. An outer screw nut 912 is connected between the outer screw sleeve 913 and the outer screw 909. The outer screw nut 912 and the outer screw sleeve 913 are fixedly connected and cannot rotate relative to each other. The outer screw sleeve 913 is fixedly connected to the back plate 33 of the side suction chamber through the third connector 914. The outer screw nut 912 is screwed to the outer periphery of the outer screw 909. When the outer screw 909 rotates, it drives the outer screw nut 912 to move up and down along its axis, which in turn drives the outer screw sleeve 913 to move up and down in the vertical direction relative to the inner screw sleeve 908. This causes the lifting speed of the side suction chamber 3 to be greater than the lifting speed of the smoke collection chamber 2, so that it extends out of or retracts into the smoke collection chamber. Taking the side suction cavity 3 extending from the smoke collection cavity 2 as an example, since the outer screw nut 912 is relatively fixed to the side suction cavity 3 and the inner screw nut 906 is relatively fixed to the smoke collection cavity, while the outer screw nut 912 moves downward relative to the inner screw nut 906, the inner screw nut 906 itself moves downward relative to the inner screw nut 904. Therefore, the outer screw nut 912 superimposes its own movement relative to the inner screw nut 906 and the movement of the inner screw nut 906 itself, realizing the superposition of movements. This allows the side suction cavity 3 to further descend relative to the smoke collection cavity 2 (achieved through the first-stage screw nut mechanism) on the basis of the descent of the smoke collection cavity 2 relative to the main box. As a result, the rising and falling of the side suction cavity 3 is synchronized with the rising and falling of the smoke collection cavity 2, and the movement speed of the side suction cavity 3 is greater than the movement speed of the smoke collection cavity, ensuring that the side suction cavity 3 can extend from the smoke collection cavity 2.

[0057] It should be noted that the relative stroke of the smoke collection chamber and the side suction chamber can be adjusted by selecting the pitch of the external lead screw 909 and the internal lead screw 904. Furthermore, due to the lifting drive mechanism, there is a relative movement relationship between the side suction chamber and both the main box 1 and the smoke collection chamber 2. Therefore, it can be understood that the side suction chamber 3 is directly located in the main box 1 (the side suction chamber is connected to the main box through the lifting drive mechanism, and moves relative to the smoke collection chamber while also moving relative to the main box), or it can be understood that the side suction chamber 3 is located in the smoke collection chamber 2 (the side suction chamber is inside the smoke collection chamber).

[0058] like Figure 6 and Figure 12 As shown, the guide device 8 includes a front angle iron assembly and a rear angle iron assembly. The rear angle iron assembly is a three-layer nested structure consisting of a rear outer angle iron 81, a rear middle angle iron 82, a rear inner angle iron 83, and corresponding slide rails. Figure 12 As shown, the rear outer angle iron 81 is fixedly connected to the two corners of the inner side of the main box 1 near the back plate, and the rear middle angle iron 82 is connected to the rear outer angle iron 81 by a first slide rail 86. To improve the smoothness of operation, a first slide rail 86 extending vertically is provided on each of the two plates of the rear outer angle iron 81. The rear middle angle iron 82 is connected to the two side reinforcing beams 203 of the smoke collection chamber 2 and the crossbeam 210 located at the back, and the back crossbeam 210 extends along the entire length of the smoke collection chamber 2. The rear middle angle iron 82 extends into the interior of the smoke collection chamber 2, and the rear inner angle iron 83 is connected to the rear middle angle iron 82 by a second slide rail 87, which extends vertically, and each rear middle angle iron 82 is connected to a rear inner angle iron 83 by two second slide rails 87. The bottom of the rear inner angle iron 83 is fixedly connected to the internal frame of the side suction chamber 3. To ensure that the two sides of the side suction chamber 3 move synchronously during the lifting process, the two rear inner angle irons 83 are also connected by a transverse angle iron connector (not shown).

[0059] To further improve lifting stability, a front angle iron assembly connects the main housing 1 and the smoke collection chamber 2. Specifically, the front angle iron assembly includes a front outer angle iron 84, a front inner angle iron 85, and a third slide rail 88 connecting the front outer angle iron 84 and the front inner angle iron 85. The front outer angle iron 84 extends vertically and is fixedly connected to the two corners at the front of the main housing 1, while the front inner angle iron 85 is fixedly connected to the two side reinforcing beams 203 of the smoke collection chamber 2. The front outer angle iron 84 and the front inner angle iron 85 are slidably connected by the third slide rail 88.

[0060] Throughout the process, the three-layer nested structure of the front and rear angle iron components works together to precisely guide the movement trajectory of the two-stage lifting components, ensuring the rigidity of the structure and the stability of operation under complex motion conditions.

[0061] The aforementioned lifting and driving mechanism enables the side suction chamber 3 to switch between two states: "retracted into the smoke collection chamber 2" and "extended from the smoke collection chamber 2". When the side suction chamber 3 is retracted into the smoke collection chamber 2 under the action of the lifting and driving mechanism (i.e., the retracted state), its side suction port 31 is blocked by the internal structure of the smoke collection chamber 2, thus closing the side suction port 31. When the side suction chamber 3 extends downwards from inside the smoke collection chamber 2 under the action of the lifting and driving mechanism (i.e., the extended state), the side suction port 31 is fully exposed to the external environment, thus opening.

[0062] Specifically, such as Figure 1As shown, when the range hood is in standby or retracted state, the side suction chamber 3 is completely retracted into the smoke collection chamber 2, with the overall structure closely attached to the main box 1, maximizing space saving and maintaining the overall aesthetics of the kitchen. When the range hood is started and enters working mode, the lifting drive mechanism drives the smoke collection chamber 2 and the side suction chamber 3 to descend synchronously relative to the main box 1. During the descent, because the descent speed of the side suction chamber 3 is greater than that of the smoke collection chamber 2, the side suction chamber 3 gradually extends out from inside the smoke collection chamber 2 until it reaches a predetermined height close to the stovetop, forming a low-position side suction area. The extended state of the side suction chamber 3 is as follows: Figure 2 As shown in the image. This tiered lifting design solves the problem of limited adjustment range and inability to balance high-level storage and low-level strong suction in traditional single-stage lifting range hoods. It can adaptively adjust the height and combination of the smoke inlet according to the actual concentration and diffusion stage of oil fumes.

[0063] To achieve the linkage between the smoke collecting plate and the smoke gathering chamber, this embodiment provides a flipping transmission mechanism. For example... Figures 13 to 15 As shown, the tilting transmission mechanism 10 connects the main box 1, the smoke collection chamber 2, and the smoke gathering plate 4. It can tilt under the influence of the lifting movement of the smoke collection chamber 2, which is driven by a lifting drive mechanism. Figure 13 and Figure 14 As shown, the tilting transmission mechanism 10 includes a first link 101, a second link 102, a third link 103, a fourth link 105, and a swing arm 106. The first end of the first link 101 is pivotally connected to the side wall of the main housing 1, and the second end is pivotally connected to the first end of the second link 102. The second end of the second link 102 is pivotally connected to the side reinforcing beam of the smoke collection chamber 2. The first end of the third link 103 is pivotally connected to the middle position of the second link 102. The second end of the third link 103 is pivotally connected to the first end of the fourth link 104. The second end of the fourth link 104 is pivotally connected to the first end of the fifth link 105. The second end of the fifth link 105 is pivotally connected to the middle position of the swing arm 106. Figure 13 and Figure 15 As shown, the swing arm 106 has a semi-circular arc structure, with its first end pivotally connected to the bracket below the front panel and its second end fixedly connected to the smoke-collecting plate bracket. Furthermore, as... Figure 13 As shown, the smoke hood has through holes to avoid the fifth link 105 and the swing arm 106. Through this flipping transmission mechanism 10, the smoke collecting plate 4 can be flipped to open and close the top suction port while the smoke collecting chamber is raised and lowered, achieving the effect of single power driving multiple components to move in coordination.

[0064] Based on the aforementioned two-stage lifting mechanism and dual-inlet layout, to optimize the distribution of smoke airflow and enhance the fume capture capability in the core area, this embodiment further refines the design of the air inlet cross-sectional area of ​​the side inlet 31 and the top inlet 201, while also detailing the layout of the side inlet 31. Specifically, the air inlet cross-sectional area of ​​the side inlet 31 is set to be larger than that of the top inlet 201. This design aims to strengthen the dominant role of the lateral smoke path by actively distributing the smoke airflow. Given that the side inlet 31 is closer to the source of the smoke, increasing its air inlet area can directly enhance the capture capability of the initial smoke, preventing the smoke from escaping in the early stages of its rise. The top inlet 201, as a supplementary channel, is mainly responsible for collecting the residual smoke that has risen to a high position. It can achieve effective capture without an excessively large air inlet area. This differentiated airflow configuration based on spatial location effectively solves the problem of insufficient suction in the core pollution area caused by the "average effort" of each smoke inlet in traditional designs. Therefore, in practical applications, the side suction port 31 serves as the main smoke inlet, and the top suction port 201 serves as the auxiliary smoke inlet.

[0065] Preferably, the ratio of the air inlet cross-sectional area of ​​the side suction port 31 to the air inlet cross-sectional area of ​​the top suction port 201 is set to 7:3. This ratio, verified through fluid simulation and experiments, enables optimized airflow distribution: approximately 70% of the airflow is concentrated at the side suction port 31 near the stove, forming a strong main adsorption flow field to quickly capture the initial fumes generated by the stove; the remaining 30% of the airflow is distributed to the top suction port 201, forming an auxiliary capture flow field to effectively collect the rising and diffusing residual fumes. This specific ratio design overcomes the limitations of empirical allocation and achieves a better balance between suction and exhaust efficiency and energy consumption under various typical cooking conditions such as stir-frying and stewing.

[0066] Furthermore, considering that household stoves are generally equipped with dual burners, and there are two common modes: single burner working independently and both burners working simultaneously, this embodiment further optimizes the structure of the side suction port 31. For example... Figure 3 As shown, the side suction ports 31 are specifically configured as a first side suction port 311 and a second side suction port 312 symmetrically arranged along the length of the side suction cavity 3, respectively precisely corresponding to the positions of the left and right burners. This layout forms two clearly oriented low-pressure collection points, which on the one hand effectively avoids the problem of uneven suction force on the left and right sides that may occur when using a single wide side suction port 31, significantly reduces the probability of lateral escape of oil fumes when cooking simultaneously on both burners, and improves the overall collection reliability; on the other hand, when cooking with only one burner, more targeted and precise suction and exhaust can also be achieved through the corresponding side suction port 31.

[0067] like Figures 2 to 7As shown, the smoke-collecting plate 4, which is used in conjunction with the top suction port 201, is rotatably mounted at the top suction port 201. The smoke-collecting plate 4 is connected to the inner wall of the smoke collection chamber 2 via a linkage mechanism. When the range hood is in standby mode, the smoke-collecting plate 4 is closed, blocking the top suction port 201 to ensure the range hood has a flat appearance. When the range hood is working, it can be flipped open as needed or according to a preset program, exposing the top suction port 201 to work with the side suction port 31 to achieve dual suction and exhaust. At the same time, it works with the smoke-collecting hood 205 located in the smoke collection chamber 2 to form a negative pressure zone to promote the intake of fumes.

[0068] To achieve independent control of the opening and closing action of the smoke gathering plate 4 and improve the intelligence level of the system, the smoke gathering plate 4 in this embodiment is connected to a smoke gathering plate driving mechanism. The smoke gathering plate driving mechanism is connected to the smoke gathering plate 4 through a linkage mechanism 41 and is used to drive the smoke gathering plate 4 to open and close independently without being affected by the two-stage lifting mechanism.

[0069] Specifically, the smoke collecting plate drive mechanism can be implemented using a micro stepper motor in conjunction with a linkage mechanism. The stepper motor is fixedly installed on the inner wall of the smoke collecting chamber 2. One end of the linkage mechanism is connected to the motor output shaft, and the other end is connected to the bracket of the smoke collecting plate 4. The rotation center after connection has a certain distance from the rotation center of the smoke collecting plate 4 itself. Figure 4 As shown in the diagram, the motor drives the linkage mechanism to rotate, which in turn drives the smoke collection plate 4 to flip. The drive mechanism can also be equipped with a position sensor to achieve precise control of the opening and closing angle. This design transforms the smoke collection plate 4 from a passive structural component into an actively adjustable airflow guiding component, enabling it to open and close precisely according to the range hood's operating mode (standby, strong suction, automatic). More importantly, the state of the smoke collection plate 4 can be programmed to be linked with the lifting mechanism and the speed of the fan 11, constructing a smoke collection chamber shape adapted to the cooking scenario. This achieves intelligent optimization of smoke extraction performance at the system level. For example, in strong suction mode, the smoke collection plate 4 is fully opened to maximize the air intake area, and together with the side suction chamber 3 extending, it forms an all-round suction and exhaust system.

[0070] A light component 5 is also integrated at the edge of the smoke collection plate 4 facing the smoke collection chamber 2. This design aims to solve the problems of traditional range hoods where top lighting is easily blocked by users or the machine body, the light path is singular and only provides static functional lighting, and there is a lack of interaction with the dynamic structure of the product. By linking the ambient lighting with the movable structure, a harmonious unity of lighting, decoration, and dynamic visual effects is achieved.

[0071] Specifically, such as Figure 4As shown, the light assembly 5 is disposed on one side of the smoke collection plate 4 and projects light towards the other side of the smoke collection plate 4. The light assembly 5 includes a decorative strip 51 and a strip light 52 (such as an LED module) installed in the decorative strip 51. The strip light 52 projects light towards the other side along the direction through the smoke collection plate 4. The decorative strip 51 is made of high-temperature resistant and oil-resistant aluminum alloy profile and adopts a snap-fit ​​integrated assembly design: the decorative strip 51 itself has three functions: mechanical fixing, optical light guiding and appearance decoration. It is directly fixed to the edge of the smoke collection plate 4 (near the long side of the smoke collection chamber 2) through the snap-fit ​​structure, which simplifies the overall assembly structure and ensures the connection stability during frequent flipping movements.

[0072] Building upon this, the strip light 52 is not used as a traditional floodlight source, but rather as an edge-guided light source, directly attached to and illuminating the end face of a specific edge of the smoke-collecting plate 4, guiding the light into the interior of the smoke-collecting plate. At least three other edges of the smoke-collecting plate 4 (i.e., the edges without light sources) are not simply straight edges, but have undergone a unique rounded AG (Anti-Glare) process. This design combines the principles of single-sided light injection and three-sided edge light scattering: light is transmitted forward through total internal reflection inside the smoke-collecting plate; when it reaches the rounded edge roughened by the AG process, the total internal reflection condition is disrupted, allowing the light to be scattered evenly and softly. Furthermore, it can create gradual, flowing light and shadow changes during the rotation of the smoke-collecting plate, enhancing the sense of atmosphere and layering, thus forming a unique and visually appealing optical light guide system.

[0073] In addition to adding a light effect system, this embodiment of the invention also improves the oil fume collection structure. Because this invention employs a two-stage lifting mechanism, there is relative movement between the main chamber 1 and the smoke collection chamber 2, and also relative movement between the smoke collection chamber 2 and the side suction chamber 3, making the traditional fixed oil receiving structure unsuitable. To achieve efficient collection and convenient cleaning of condensed oil, this embodiment designs a dedicated oil circuit structure. This structure, combined with the reinforced structure of the smoke collection chamber 2, ensures both structural strength and systematic collection of condensed oil.

[0074] Specifically, such as Figure 5 and Figure 6As shown, side reinforcing beams 203 are respectively provided on the inner sides of the side walls at both ends of the smoke collection chamber 2 along its length. Each side reinforcing beam 203 is made of high-strength steel plate by stamping, which not only enhances the structural strength of the smoke collection chamber 2 and prevents deformation during lifting, but also integrates the function of collecting condensed oil. Its bottom has a U-shaped groove 2031 that folds outward and opens upward. The U-shaped groove 2031 extends along the width of the smoke collection chamber 2 and slopes downward towards the back of the smoke collection chamber 2. It is located directly below the inner side wall of the main box 1 and the inner side wall of the smoke collection chamber 2, and can collect the condensed oil dripping from the inner side wall of the main box 1 and the inner side wall of the smoke collection chamber 2 in real time. Even if there is relative movement between the smoke collection chamber 2 and the main box 1, the condensed oil dripping by gravity will be completely collected by the U-shaped groove 2031 because it is located below them, and there will be no oil leakage problem. Furthermore, the sloping surface of the U-shaped groove 2031 guides the condensed oil to the rear of the side reinforcing beam 203 for further collection.

[0075] Continue to refer to Figure 5 and Figure 6 The smoke collection chamber 2 is also equipped with a central reinforcing beam 204, which is made of the same material as the side reinforcing beam 203. It is arranged horizontally and connects the two side reinforcing beams 203, which not only further enhances the overall strength of the smoke collection chamber 2, but also plays the role of collecting condensed oil. It is used to guide the condensed oil collected by the U-shaped groove 2031 downward to the smoke collection hood 205 located below the central reinforcing beam 204. The condensed oil on the front and rear side walls of the main chamber 1 and the smoke collection chamber 2 can drip directly onto the smoke collection hood 205 installed inside the smoke collection chamber 2. The smoke collection hood 205 collects the condensed oil from the side walls, front wall, and rear side walls and guides it to the annular oil collection groove 206 surrounding the side suction chamber 3. The annular oil collection groove 206 is formed on the frame located at the bottom of the smoke collection chamber 2. The condensed oil collected on the top surface of the smoke collection hood 205 can be guided by its own guiding structure (not shown) to the annular oil collection groove 206 surrounding the side suction chamber 3, and then guided by the oil guiding rubber part (not shown) on the back side of the annular oil collection groove 206 to the rear side wall of the side suction chamber 3, and finally flow into the oil cup 32 at the bottom of the side suction chamber 3.

[0076] The oil circuit structure provided by the present invention forms a systematic oil collection network through the coordinated cooperation of the side reinforcing beam 203 (with U-shaped groove 2031), the middle reinforcing beam 204, the annular oil collection groove 206 and the oil cup 32, realizing the full-link oil collection of the movable mechanism, ensuring the reliability of the oil circuit in complex lifting movements, and simplifying the cleaning and maintenance process.

[0077] As the core power source for fume extraction, the fan 11's structural design is also adapted to the overall extraction system. To reduce air resistance in the smoke path and improve the operating efficiency of the fan 11 under different working conditions, the fan 11 used in this invention has a rearward-opening main smoke inlet 111 and a front-opening auxiliary smoke inlet 112, with the main smoke inlet 111 and the auxiliary smoke inlet 112 facing away from each other axially. Correspondingly, the smoke collection chamber 2 is constructed with a main smoke path and an auxiliary smoke path, achieving redundancy and optimized configuration of the smoke extraction channel. The main smoke path corresponds to the main smoke inlet 111, and the auxiliary smoke path corresponds to the auxiliary smoke inlet 112, as shown below. Figure 7 and Figure 8 As shown, the main smoke path is a vertically upward smoke path, while the auxiliary smoke path is a smoke path that deflects to the side. When the side suction port 31 and the top suction port 201 are opened simultaneously, the fumes enter through the top suction port 201 and the side suction port 31. The vast majority of the fumes then enter the main smoke inlet 111 of the fan 11 after passing through the main smoke path, achieving efficient extraction and discharge of a large amount of fumes. A schematic diagram of the main smoke path is shown below. Figure 7 As shown in the diagram. Simultaneously, a small portion of the oil fumes, under the suction of the fan 11, enters the auxiliary smoke inlet 112 via the auxiliary smoke path, as shown in the diagram. Figure 8 As shown in the diagram. This achieves dual-path smoke extraction and exhaust, improving smoke extraction efficiency and effectiveness, and effectively reducing internal oil condensation.

[0078] Understandably, when only the top suction port 201 or the side suction port 31 is open, most of the fumes are discharged through the main smoke path, and a small portion of the fumes are discharged through the auxiliary smoke path.

[0079] Based on the above-mentioned basic structural and functional optimizations, the range hood of the present invention also adds an image recognition module 7 and a matching protective component to realize the intelligent function of the range hood, while improving the maintainability and service life of the module.

[0080] like Figure 5 , Figure 6 and Figure 9 As shown, the smoke collection chamber 2 has a smoke hood 205 with a light hole for installing a light. The light hole is a strip-shaped hole that extends along the length of the smoke collection chamber 2. A light bracket 208 is provided on the side of the smoke hood 205 facing away from the cooking area. The light bracket 208 is installed by bolt fixing or snap-fit ​​connection. The image recognition module 7 is detachably connected to the light bracket 208.

[0081] The image recognition module 7 is mainly used for image acquisition and data processing. It integrates a camera and can further integrate a fume sensor, temperature sensor, wireless communication module, etc., to realize functions such as fume concentration detection, image acquisition, and remote interaction with mobile terminals. Both the lamp holder 208 and the image recognition module 7 are located on the side of the fume hood 205 facing away from the cooking area.

[0082] To protect the image recognition module 7 from the corrosion of oil fumes, high temperatures and moisture, and to extend its service life, this embodiment also provides a protective component. This component is placed on the outside of the image recognition module 7, located on the side of the smoke hood 205 facing away from the cooking area, and is fixedly connected to the smoke hood 205.

[0083] Specifically, such as Figures 4 to 9 As shown, the protective components are made of high-temperature resistant, oil-proof, and waterproof materials, including a protective plate 207 and a protective cover 209. These two components are fastened together and cover the outside of the image recognition module 7. Only a necessary access port 2071 is provided on the protective plate 207, effectively isolating various corrosive factors and providing a reliable physical protective barrier for the image recognition module 7. The access port 2071 is located on the side facing the front panel bracket (not shown) of the range hood. The front panel bracket has a hollow structure to provide support for the front panel 202 and is spatially connected to the access port 2071. When the image recognition module 7 needs to be disassembled for repair or replacement, maintenance personnel do not need to perform extensive disassembly. The following steps are sufficient to complete the disassembly and assembly of the image recognition module 7: First, remove the light from below the smoke hood 205; then remove the front panel 202 and its associated components to expose the access port 2071; next, remove the screws connecting the light bracket 208 and the image recognition module 7 bracket, and the image recognition module 7, along with its bracket, can be removed from the front of the range hood as a whole. The process is convenient and highly efficient.

[0084] To further enhance user convenience while maintaining a clean and simple product appearance, this embodiment also includes a gesture light module 6. This module is snapped onto a bracket below the front panel 202 of the smoke collection chamber 2, achieving seamless integration. The gesture light module 6 integrates a gesture sensor and an indicator light. The gesture sensor can recognize user gestures such as waving and pausing, enabling functions such as starting and stopping the fan 11, adjusting its speed, and switching the lights on and off. The indicator light displays the operating status of the range hood (standby, working, fault). Its snap-on installation method facilitates assembly, ensures stable connection, and can withstand vibrations during range hood operation, ensuring reliable gesture recognition. This installation position guarantees the optimal signal reception angle for the gesture sensor while concealing the module outside the main visual area, avoiding disruption to the clean design of the product's front and achieving a harmonious unity between the added functionality and the overall design.

[0085] Based on the implementation design of all the above components, the working process of the range hood of the present invention is exemplified as follows: When the user uses a dual-burner stove for cooking, the range hood is turned on. The system activates the two-stage lifting mechanism according to the preset program or the result of the oil fume concentration detection. During the process of the smoke collection chamber 2 descending relative to the main box 1, the side suction chamber 3 extends further relative to the smoke collection chamber 2 until it is close to the stove to form a low-position side suction area. At the same time, the smoke collection plate driving mechanism drives the smoke collection plate 4 to flip and open, exposing the top suction port 201, and the fan 11 is started.

[0086] During cooking, the initial fumes generated by the stove are quickly captured by the first side intake 311 and the second side intake 312. A small amount of residual fumes rising to a higher position are captured by the top intake 201 and enter the fan 11 through the main and auxiliary smoke paths, achieving all-round and efficient exhaust. At the same time, the light assembly 5 works synchronously to provide soft decorative lighting for the cooking area. The condensed oil generated during the process is guided by the side reinforcing beam 203, the central reinforcing beam 204, and the annular oil collection groove 206, and finally flows into the oil cup 32 for easy cleaning. After cooking, the range hood enters a delayed shutdown state to continue to exhaust residual fumes. At the same time, the smoke collection plate 4 gradually closes, and the side intake chamber 3 is stored inside the smoke collection chamber 2. The smoke collection chamber 2 and the side intake chamber 3 rise together to a position close to the main box 1 for storage, saving kitchen space. In addition, users can control the range hood's working status through gestures on the gesture light module 6. The image recognition module 7 detects relevant parameters in real time and automatically adjusts the fan speed 11 to achieve intelligent operation, thus providing a range hood with significant improvements in both visual appeal and exhaust performance.

[0087] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A range hood, characterized in that, The range hood includes: Main box (1), which is equipped with a fan (11); The smoke collection chamber (2) is configured to be able to rise and fall relative to the main box (1), and the smoke collection chamber (2) forms a top suction port (201). A side suction chamber (3) is provided in the smoke collection chamber (2) or the main box (1) in a manner that allows it to be raised and lowered relative to the smoke collection chamber (2). The side suction chamber (3) has a side suction port (31) facing the stove side. The side suction chamber (3) opens or closes the side suction port (31) by raising and lowering relative to the smoke collection chamber (2). A smoke-collecting plate (4) is rotatably disposed at the top suction port (201) for opening and closing the top suction port (201).

2. The range hood according to claim 1, characterized in that, The range hood also includes: The drive system includes a lifting drive mechanism, which drives the side suction cavity (3) to rise and fall synchronously with the smoke collection cavity (2), so that the side suction cavity (3) can switch between two states: being stored in the smoke collection cavity (2) and being extended from the smoke collection cavity (2); in the stored state, the side suction port (31) is closed, and in the extended state, the side suction port (31) is open.

3. The range hood according to claim 2, characterized in that, The drive system also includes: A smoke-collecting plate driving mechanism, which is connected to the smoke-collecting plate (4), is used to drive the smoke-collecting plate (4) to open and close; or A flipping transmission mechanism is connected to the main box (1), the smoke collection chamber (2) and the smoke gathering plate (4) so ​​that the smoke gathering plate (4) flips under the drive of the lifting and lowering movement of the smoke collection chamber (2).

4. The range hood according to claim 1, characterized in that, The air intake cross-sectional area of ​​the side suction port (31) is larger than that of the top suction port (201).

5. The range hood according to claim 4, characterized in that, The ratio of the air inlet cross-sectional area of ​​the side suction port (31) to the air inlet cross-sectional area of ​​the top suction port (201) is 7:

3.

6. The range hood according to claim 1, characterized in that, The range hood also includes a light component (5), which is disposed on one side of the smoke collection plate (4) and projects light towards the other side of the smoke collection plate (4).

7. The range hood according to claim 6, characterized in that, The light assembly (5) includes a trim strip (51) and a strip light (52) installed in the trim strip (51), the strip light (52) projecting light to the other side along the direction through the smoke-collecting plate (4).

8. The range hood according to claim 1, characterized in that, The smoke collection chamber (2) has two side reinforcing beams (203) on the inner sides of its two side walls at both ends in the length direction. The bottom of the side reinforcing beam (203) has a U-shaped groove (2031) that is folded towards the side wall of the main box (1). The U-shaped groove (2031) is located directly below the side wall of the main box (1) and the side wall of the smoke collection chamber (2) and is inclined towards the back side of the smoke collection chamber (2) to receive the condensed oil dripping from above.

9. The range hood according to claim 8, characterized in that, The smoke collection chamber (2) includes a smoke hood (205) facing the cooking area. The smoke collection chamber (2) is also provided with a central reinforcing beam (204). The central reinforcing beam (204) connects two side reinforcing beams (203) and can guide the condensed oil flowing out of the U-shaped groove (2031) to the smoke hood (205) located below the central reinforcing beam (204). The smoke collection chamber (2) also includes an annular oil collection groove (206) arranged around the side suction chamber (3). The condensed oil collected by the smoke hood (205) can be introduced into the annular oil collection groove (206). The annular oil collection groove (206) is connected to the oil cup (32) located at the bottom of the side suction chamber (3) on the back of the side suction chamber (3).

10. The range hood according to claim 1, characterized in that, The fan (11) has a rearward-opening main smoke inlet (111) and a front-opening auxiliary smoke inlet (112). The smoke collection chamber (2) is constructed with a main smoke path and an auxiliary smoke path. The main smoke inlet (111) corresponds to the main smoke path, and the auxiliary smoke inlet (112) corresponds to the auxiliary smoke path, so that the oil fumes drawn in from the top suction port (201) and / or the side suction port (31) can be discharged from the main smoke path and the auxiliary smoke path.

11. The range hood according to claim 1, characterized in that, The smoke collection chamber (2) includes a smoke hood (205) facing the cooking area, and the smoke hood (205) is equipped with an image recognition module (7).

12. The range hood according to claim 11, characterized in that, The smoke hood (205) has a lamp holder (208) for fixing the lighting lamp on the side facing away from the cooking area, and the image recognition module (7) is detachably connected to the lamp holder (208).

13. The range hood according to claim 12, characterized in that, The range hood also includes a protective component, which is installed outside the image recognition module (7) and located on the side of the smoke collection hood (205) facing away from the cooking area. The protective component is provided with an inspection port (2071), which is located on the side of the protective component facing the front panel bracket of the range hood.

14. The range hood according to claim 1, characterized in that, The range hood also includes a gesture light module (6), which is snapped onto a bracket below the front panel (202) of the smoke collection chamber (2).

Images