Range hood

Abstract

The utility model discloses a range hood which comprises a range hood body, an air outlet adjusting assembly and an air inlet opening and closing assembly. An air outlet is formed in the top of an air collecting box of the range hood main body and is connected with an air outlet seat; an air suction opening is formed in an air suction panel of the range hood main body; the air outlet adjusting assembly is connected to the air outlet end of the air outlet base and used for adjusting the effective air outlet area of the air outlet end of the air outlet base. The air inlet opening and closing assembly is connected to the rear side of the air suction panel and used for opening or closing the air suction opening. According to the range hood disclosed by the utility model, the effective air outlet area of the air outlet end of the air outlet seat can be adjusted according to the oil smoke amount, so that the smoke exhaust requirements in different cooking environments can be met, and the use effect of the range hood is improved. In addition, after cooking work is completed, the exhaust inlet can be closed through the air inlet opening and closing assembly, a user is prevented from seeing the internal structure of the range hood through the exhaust inlet, and the overall attractiveness of the range hood is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of smoke hood technology, specifically to a smoke hood. Background Technology

[0002] A range hood, also known as a kitchen exhaust hood, is a kitchen appliance used to absorb and remove fumes, steam, smoke, and odors produced during cooking. It is primarily installed above the stovetop and effectively reduces kitchen pollution, keeping the air fresh and protecting the health of the cook. In existing range hoods, fumes from the collection chamber are discharged through the outlet connector into the external exhaust duct, ultimately being discharged outdoors. However, the inner diameter of the outlet connector is not adjustable, preventing the range hood from effectively controlling its exhaust speed and noise level based on the amount of fumes, thus reducing its performance. Furthermore, the air intake of existing range hoods is typically normally open, allowing users to view the internal structure and affecting the aesthetics. Utility Model Content

[0003] The purpose of this utility model is to provide a range hood that solves the above-mentioned technical problems.

[0004] The range hood proposed in this utility model includes a range hood body, an air outlet adjustment component, and an air inlet opening and closing component; the top of the air collection box of the range hood body is provided with an air outlet, and an air outlet seat is connected to the air outlet; the air intake panel of the range hood body is provided with an air intake; the air outlet adjustment component is connected to the air outlet end of the air outlet seat and is used to adjust the effective air outlet area of ​​the air outlet end of the air outlet seat; the air inlet opening and closing component is connected to the rear side of the air intake panel and is used to open or close the air intake.

[0005] According to one embodiment of the present invention, the air outlet adjustment assembly includes a connecting pipe, a blade assembly, and a first drive assembly. The connecting pipe is a hollow pipe. The blade assembly is disposed inside the hollow pipe and includes several blades. The several blades are stacked on each other and form a smoke exhaust channel adapted to the inner diameter of the connecting pipe. The first drive assembly is used to drive the blade assembly so that the upper ends of the several blades move closer to each other and reduce the outlet of the smoke exhaust channel.

[0006] According to one embodiment of the present invention, the lower ends of several blades are connected to the inner wall of the connecting pipe, and the first driving component applies force to the upper ends of the several blades to reduce the outlet of the smoke exhaust channel.

[0007] According to one embodiment of the present invention, the first drive assembly includes a first drive motor, a first drive gear, a gear ring, a first retraction rope, and a second retraction rope. A guide ring is connected to the inner wall of the connecting pipe, and the gear ring is slidably connected to the guide ring. The first drive motor is mounted on the connecting pipe, and its drive end is connected to the first drive gear, which meshes with the gear ring. Each blade has a connecting block at its upper end. The first retraction rope passes through the connecting block on one part of the blades, and the second retraction rope passes through the connecting block on another part of the blades. The first ends of the first and second retraction ropes are close to each other. The first end of the first retraction rope is connected to the gear ring, and the first end of the second retraction rope is connected to the connecting pipe. The second ends of the first and second retraction ropes are close to each other. The second end of the first retraction rope is connected to the connecting pipe, and the second end of the second retraction rope is connected to the gear ring.

[0008] According to one embodiment of the present invention, the inner wall surface of the connecting tube is provided with a first connecting seat connected to the second end of the first retractable rope and a second connecting seat connected to the first end of the second retractable rope, and the first connecting seat and the second connecting seat are symmetrically arranged.

[0009] According to one embodiment of the present invention, a flow guide sleeve is also provided inside the connecting pipe, and the lower ends of several blades are connected to the flow guide sleeve. The inner cylinder of the flow guide sleeve is conical, and the inner diameter gradually decreases from bottom to top.

[0010] According to one embodiment of the present invention, the air inlet opening and closing assembly includes a base plate, an upper flap, a lower flap, and a second driving assembly. The base plate is provided with an avoidance channel. The base plate is connected to the rear side of the air intake panel. The avoidance channel is arranged around the air intake. The upper flap is connected above the avoidance channel. The lower flap is connected below the avoidance channel. The upper flap and the lower flap have a first state in which they are close to each other and close the avoidance channel, and a second state in which they are far apart and open the avoidance channel. The second driving assembly is used to drive the upper flap and the lower flap to switch between the first state and the second state.

[0011] According to one embodiment of the present invention, the upper and lower edges of the clearance passage are provided with a plurality of rotating seats, the lower edge of the upper flap is provided with a plurality of upper rotating blocks, and the lower edge of the lower flap is provided with a plurality of lower rotating blocks. The upper rotating blocks are rotatably connected to the rotating seats at the upper edge of the clearance passage, and the lower rotating blocks are rotatably connected to the rotating seats at the lower edge of the clearance passage. In the first state, the upper edges of the upper flap and the lower flap approach each other and abut against each other. In the second state, the upper edges of the upper flap and the lower flap move away from each other.

[0012] According to one embodiment of the present invention, the second driving component includes a driving member and a transmission member. The driving member includes a second driving motor, and the output of the second driving motor is connected to a second driving gear. The transmission member includes a first rack and a second rack, which are located on opposite sides of the second driving gear. The second driving gear drives the first rack and the second rack to move in opposite directions. The first rack is connected to the upper flip plate, and the second rack is connected to the lower flip plate.

[0013] According to one embodiment of the present invention, the upper flip plate is provided with a plurality of upper connecting blocks, the lower flip plate is provided with a plurality of lower connecting blocks, and the transmission component also includes a third pull rope. The free end of the third pull rope connected to the upper connecting block is connected to the first rack, and the free end of the third pull rope connected to the lower connecting block is connected to the second rack.

[0014] Compared with the prior art, the smoke hood of this utility model has the following advantages:

[0015] This utility model discloses a range hood with an air outlet adjustment component that connects the air outlet of the range hood body to the kitchen exhaust duct. This allows the cooking fumes drawn in by the range hood body to flow through the air outlet adjustment component to the exhaust duct, and then through the exhaust duct to the outside. The air outlet adjustment component can adjust the effective air outlet area of ​​the air outlet end of the air outlet seat. When the size of the range hood's air intake remains constant, adjusting the effective air outlet area of ​​the air outlet end of the air outlet seat allows for reasonable control of the range hood's exhaust efficiency and noise level.

[0016] When cooking produces a large amount of fumes, the effective exhaust area of ​​the air outlet can be reduced. This increases the airflow velocity from the intake to the exhaust end, thereby improving the efficiency of fume extraction. When cooking produces a small amount of fumes, the effective exhaust area of ​​the air outlet can be increased. This reduces the airflow velocity within the range hood, decreasing noise and improving the user experience. Therefore, adjusting the effective exhaust area of ​​the air outlet according to the amount of fumes can meet the fume extraction needs of different cooking environments, thus improving the performance of the range hood.

[0017] In addition, after cooking is complete, the air intake can be closed via the air inlet opening and closing component to prevent users from seeing the internal structure of the range hood through the air intake, thus ensuring the overall aesthetics of the range hood. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the smoke hood of this utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the smoke hood of this utility model;

[0020] Figure 3 This is a schematic diagram of the air outlet adjustment component in this utility model;

[0021] Figure 4 This is a schematic diagram of another embodiment of the air outlet adjustment component of this utility model;

[0022] Figure 5 This is a schematic diagram of another embodiment of the air outlet adjustment component of this utility model;

[0023] Figure 6 This is an exploded view of the air outlet adjustment component in this utility model;

[0024] Figure 7 This is a schematic diagram of the air inlet opening and closing component in this utility model;

[0025] Figure 8 This is an exploded view of the air inlet opening and closing component in this utility model.

[0026] In the diagram: 1. Main body of the range hood; 11. Air collection box; 111. Air outlet seat; 12. Suction panel; 121. Suction outlet; 2. Air outlet adjustment assembly; 21. Connecting pipe; 211. Guide ring; 212. First connecting seat; 213. Second connecting seat; 22. Blade assembly; 221. Blade; 2211. Connecting block; 2212. Fixing block; 23. First drive assembly; 231. First drive motor; 232. First drive gear; 233. Gear ring; 234. First retraction rope. 235. Second retraction rope, 24. Guide sleeve, 241. Fixing base, 3. Air inlet opening and closing assembly, 31. Base plate, 311. Clearance channel, 312. Rotary seat, 313. Slide seat, 32. Upper flip plate, 321. Upper rotating block, 322. Connecting block, 33. Lower flip plate, 331. Lower rotating block, 332. Connecting block, 34. Second drive assembly, 341. Second drive motor, 342. Second drive gear, 343. First rack, 344. Second rack, 345. Third pull rope.

[0027] The implementation and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0028] The following drawings will disclose several embodiments of this utility model. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit this utility model. That is, in some embodiments of this utility model, these practical details are not essential. In addition, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0029] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0030] Furthermore, in this utility model, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the utility model. They are merely used to distinguish components or operations described with the same technical terms and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0031] To further understand the content, features, and effects of this utility model, the following embodiments are provided, and detailed descriptions are given below in conjunction with the accompanying drawings:

[0032] This utility model discloses a smoke hood. Please refer to [link / reference]. Figure 1 and Figure 2 The range hood proposed in this utility model includes a range hood body 1, an air outlet adjustment component 2, and an air inlet opening and closing component 3; the top of the air collection box 11 of the range hood body 1 is provided with an air outlet, and an air outlet seat 111 is connected to the air outlet; the air intake panel 12 of the range hood body 1 is provided with an air intake 121; the air outlet adjustment component 2 is connected to the air outlet end of the air outlet seat 111 and is used to adjust the effective air outlet area of ​​the air outlet end of the air outlet seat 111; the air inlet opening and closing component 3 is connected to the rear side of the air intake panel 12 and is used to open or close the air intake 121.

[0033] In this embodiment, a smoke exhaust fan is installed inside the air collection box 11. When the smoke exhaust fan is running, it can generate negative pressure at the air intake 121, so that the air intake 121 draws the oil fumes into the air collection box 11, and then flows to the smoke exhaust pipe through the air outlet and the air outlet adjustment component 2, and finally exhausts them to the outside.

[0034] The air outlet adjustment component 2 can adjust the effective air outlet area of ​​the air outlet seat 111. When the size of the range hood's intake vent 121 remains constant, the effective air outlet area of ​​the air outlet seat 111 can be adjusted to reasonably control the range hood's smoke extraction efficiency and noise level. When the amount of cooking fumes is large, the effective air outlet area of ​​the air outlet seat 111 can be reduced, thereby increasing the airflow velocity from the intake vent 121 to the air outlet seat 111, thus improving the efficiency of smoke extraction. When the amount of cooking fumes is small, the effective air outlet area of ​​the air outlet seat 111 can be increased, thereby reducing the airflow velocity within the range hood, reducing noise, and improving the user experience. Therefore, by adjusting the effective air outlet area of ​​the air outlet seat 111 according to the amount of cooking fumes, the smoke extraction needs under different cooking environments can be met, thereby improving the performance of the range hood.

[0035] The air inlet opening and closing component 3 is used to open or close the air intake 121. After cooking is completed, the air intake 121 can be closed through the air inlet opening and closing component 3 to prevent users from seeing the internal structure of the range hood through the air intake 121, so as to ensure the overall aesthetics of the range hood.

[0036] The smoke hood of this utility model, such as Figures 2 to 6 As shown, the air outlet adjustment assembly 2 includes a connecting pipe 21, a blade assembly 22, and a first drive assembly 23. The connecting pipe 21 is a hollow pipe. The blade assembly 22 is disposed inside the hollow pipe and includes several blades 221. The several blades 221 are stacked on each other and form a smoke exhaust channel that is adapted to the inner diameter of the connecting pipe 21. The first drive assembly 23 is used to drive the blade assembly 22, so that the upper ends of the several blades 221 move closer to each other and reduce the outlet of the smoke exhaust channel.

[0037] The lower end of the connecting pipe 21 connects to the air outlet of the range hood, while the upper end connects to the kitchen's exhaust duct. Several blades 221 are stacked circumferentially along the connecting pipe 21 to form an exhaust channel. When fumes flow through the connecting pipe 21, they can only flow through the exhaust channel to the exhaust duct and cannot exit through the periphery of the blades 221. The upper ends of the blades 221 form the outlet of the exhaust channel. The upper ends of the blades 221 can be close together or far apart to adjust the size of the exhaust channel outlet. The first drive assembly 23 is drivenly connected to the blade assembly 22, allowing the upper ends of the blades 221 to move closer or further apart. Therefore, by controlling the first drive assembly 23, the size of the exhaust channel outlet can be controlled to decrease or increase.

[0038] The smoke hood of this utility model, such as Figures 2 to 6As shown, the lower ends of several blades 221 are connected to the inner wall of the connecting pipe 21. The first driving assembly 23 applies force to the upper ends of the blades 221, causing the outlet of the smoke exhaust channel to narrow. The lower ends of the blades 221 are rotatably connected to the inner wall of the connecting pipe 21, allowing the blades 221 to rotate relative to the connecting pipe 21. During the rotation of the blades 221, the upper ends of the blades 221 can move closer to each other towards the center line of the connecting pipe 21, or move further away from each other towards the center line of the connecting pipe 21. The first driving assembly 23 applies force to the upper ends of the blades 221, driving the blades 221 to rotate, so that the upper ends of the blades 221 can move closer to or further away from each other.

[0039] The smoke hood of this utility model, such as Figures 2 to 6 As shown, the first drive assembly 23 includes a first drive motor 231, a first drive gear 232, a gear ring 233, a first retraction rope 234, and a second retraction rope 235. A guide ring 211 is connected to the inner wall of the connecting pipe 21, and the gear ring 233 is slidably connected to the guide ring 211. The first drive motor 231 is mounted on the connecting pipe 21, and its drive end is connected to the first drive gear 232, which meshes with the gear ring 233. Each blade 221 has a connecting block 2211 at its upper end, and the first retraction rope 234 passes through a portion of the blade. The connecting block 2211 on 221, the second contraction rope 235 passes through the connecting block 2211 on another part of the blade 221, the first end of the first contraction rope 234 and the first end of the second contraction rope 235 are close to each other, the first end of the first contraction rope 234 is connected to the toothed ring 233, and the first end of the second contraction rope 235 is connected to the connecting tube 21; the second end of the first contraction rope 234 and the second end of the second contraction rope 235 are close to each other, the second end of the first contraction rope 234 is connected to the connecting tube 21, and the second end of the second contraction rope 235 is connected to the toothed ring 233.

[0040] A guide ring 211 and a gear ring 233 are arranged around the centerline of the connecting pipe 21. The gear ring 233 can slide along the guide ring 211 so that it can rotate around the centerline of the connecting pipe 21. The output end of the first drive motor 231 can drive the first drive gear 232 to rotate. The first drive gear 232 meshes with the gear ring 233, so that the output end of the first drive motor 231 can drive the gear ring 233 to rotate. The rotation axis of the first drive gear 232 intersects the centerline of the connecting pipe 21. Several blades 221 are divided into two groups with the rotation axis of the first drive gear 232 as the boundary. The first contraction rope 234 passes through the connecting block 2211 on the first group of blades 221 in sequence, and the second contraction rope 235 passes through the connecting block 2211 on the second group of blades 221 in sequence. The first end of the first contraction rope 234 and the first end of the second contraction rope 235 are close to each other, and the second end of the first contraction rope 234 and the second end of the second contraction rope 235 are close to each other. The first end of the first contraction rope 234 is connected to the toothed ring 233, and the second end is connected to the connecting tube 21; the first end of the second contraction rope 235 is connected to the connecting tube 21, and the second end is connected to the toothed ring 233.

[0041] When the first drive motor 231 drives the gear ring 233 to rotate clockwise, the second end of the first contraction rope 234 is fixed, while the first end moves with the gear ring 233, causing the middle of the first contraction rope 234 to gradually approach the center line of the connecting pipe 21. This causes the first contraction rope 234 to drive the first set of blades 221 to rotate, so that the upper ends of the first set of blades 221 also gradually approach the center line of the connecting pipe 21. Simultaneously, the first end of the second contraction rope 235 is fixed, while the second end moves with the gear ring 233. The middle of the second contraction rope 235 gradually approaches the center line of the connecting pipe 21, causing the second set of blades 221 to rotate, so that the upper ends of the second set of blades 221 also gradually approach the center line of the connecting pipe 21. Therefore, when the gear ring 233 rotates clockwise, the upper ends of both the first and second sets of blades 221 move closer to each other towards the center line of the connecting pipe 21, thereby narrowing the outlet of the smoke exhaust channel.

[0042] When the first drive motor 231 drives the gear ring 233 to reverse, the second end of the first contraction rope 234 is fixed, while the first end moves with the gear ring 233. At this time, the first contraction rope 234 elastically contracts, causing its middle portion to gradually move away from the center line of the connecting pipe 21. This causes the first contraction rope 234 to drive the first set of blades 221 to rotate, so that the upper ends of the first set of blades 221 also gradually move away from the center line of the connecting pipe 21. Simultaneously, the first end of the second contraction rope 235 is fixed, while the second end moves with the gear ring 233. At this time, the second contraction rope 235 elastically contracts, causing its middle portion to gradually move away from the center line of the connecting pipe 21. This causes the second contraction rope 235 to drive the second set of blades 221 to rotate, so that the upper ends of the second set of blades 221 also gradually move away from the center line of the connecting pipe 21. Therefore, when the gear ring 233 reverses, the upper ends of both the first and second sets of blades move closer together in a direction away from the center line of the connecting pipe 21, thereby restoring the expansion of the exhaust channel outlet.

[0043] The first drive motor 231 is connected to the outside of the connecting pipe 21, and its drive end extends into the connecting pipe 21 to connect with the first drive gear 232, causing the first drive gear 232 to drive the gear ring 233 to rotate along the guide ring 211. A through hole is provided in the wall of the connecting pipe 21. The first drive motor 231 is mounted on the outer wall of the connecting pipe 21, and its drive end extends into the connecting pipe 21 through the through hole. This prevents the first drive motor 231 from occupying the internal space of the connecting pipe 21, making the internal structure of the air outlet adjustment assembly 2 simpler and more compact.

[0044] Both the guide ring 211 and the gear ring 233 have notches. The guide ring 211 can be integrally formed with the connecting pipe 21 to simplify the connection between the guide ring 211 and the connecting pipe 21. When assembling the gear ring 233 onto the guide ring 211, one end of the gear ring 233 at its notch can be inserted into one end of the guide ring 211 at its notch. By rotating the gear ring 233, it can be aligned with the insertion point of the guide ring 211. This simplifies the assembly method of the gear ring 233 and the guide ring 211 and improves the convenience of the assembly process.

[0045] The smoke hood of this utility model, such as Figure 4 and Figure 5 As shown, the inner wall of the connecting tube 21 is provided with a first connecting seat 212 connected to the second end of the first retractable rope 234 and a second connecting seat 213 connected to the first end of the second retractable rope 235. The first connecting seat 212 and the second connecting seat 213 are symmetrically arranged.

[0046] The first connecting seat 212 has a first rope-passing hole. The second end of the first contraction rope 234 can pass through the first rope-passing hole and be fixed to the first connecting seat 212. This simplifies the connection between the first contraction rope 234 and the connecting pipe 21 and improves the connection strength between the first contraction rope 234 and the connecting pipe 21. The second connecting seat 213 has a second rope-passing hole. The first end of the second contraction rope 235 can pass through the second rope-passing hole and be fixed to the second connecting seat 213. This simplifies the connection between the second contraction rope 235 and the connecting pipe 21 and improves the connection strength between the second contraction rope 235 and the connecting pipe 21.

[0047] The smoke hood of this utility model, such as Figure 6 As shown, a guide sleeve 24 is also provided inside the connecting pipe 21. The lower ends of several blades 221 are connected to the guide sleeve 24. The inner cylinder of the guide sleeve 24 is conical, and the inner diameter gradually decreases from bottom to top. The guide sleeve 24 is arranged in a ring shape and is connected to the inner wall of the connecting pipe 21. The guide sleeve 24 can raise the connection position of several blades 221, thereby simplifying the rotation and installation of several blades 221 on the inner wall of the connecting pipe 21 and improving the installation convenience of several blades 221. The guide sleeve 24 is located below the guide ring 211. The inner cylinder of the guide sleeve 24 can guide the oil fumes. After the oil fumes flow through the inner cylinder of the guide sleeve 24, they can flow towards the center of the exhaust channel. In this way, the oil fumes flow through the guide sleeve 24 and directly rush towards the guide ring 211, causing airflow turbulence, thereby improving the airflow smoothness when the oil fumes flow through the outlet adjustment structure.

[0048] A fixing seat 241 is provided on the upper end face of the guide sleeve 24, and a fixing block 2212 is provided on the outer wall of the blade 221. The fixing block 2212 is connected to the fixing seat 241, and the lower end of the blade 221 extends into the guide sleeve 24. The outer wall of the blade 221 is the side of the blade 221 that is away from the center line of the connecting pipe 21, and the inner wall of the blade 221 is the side of the blade 221 that faces the center line of the connecting pipe 21. By setting the fixing block 2212 on the outer wall of the blade 221, the blade 221 can be rotatably connected to the fixing seat 241 on the top surface of the guide sleeve 24, and the lower end of the blade 221 can extend into the guide sleeve 24. Thus, when the oil fumes flowing through the guide sleeve 24 and then out of the guide sleeve 24, they can flow along the inner wall of the blade 221 to the exhaust channel, preventing the oil fumes from flowing out from the gap between the blade 221 and the guide sleeve 24, thereby further improving the guiding effect of the oil fumes.

[0049] The smoke hood of this utility model, such as Figure 7 and Figure 8As shown, the air inlet opening and closing assembly 3 includes a base plate 31, an upper flap 32, a lower flap 33, and a second driving assembly 34. The base plate 31 is provided with a clearance channel 311. The base plate 31 is connected to the rear side of the air intake panel 12. The clearance channel 311 is arranged around the air intake 121. The upper flap 32 is connected above the clearance channel 311. The lower flap 33 is connected below the clearance channel 311. The upper flap 32 and the lower flap 33 have a first state in which they are close to each other and close the clearance channel 311, and a second state in which they are far apart from each other and open the clearance channel 311. The second driving assembly 34 is used to drive the upper flap 32 and the lower flap 33 to switch between the first state and the second state.

[0050] During cooking, the second drive assembly 34 simultaneously drives the upper flap 32 and the lower flap 33 to a second state, where the upper flap 32 and the lower flap 33 move away from each other and open the clearance channel 311 to simultaneously draw in the fumes from the self-suction vent 121 and the clearance channel 311. After cooking is complete, the second drive assembly 34 simultaneously drives the upper flap 32 and the lower flap 33 to a first state. At this time, the upper flap 32 and the lower flap 33 move closer to each other and close the clearance channel 311, thus sealing off the vent 121. This prevents the user from seeing the internal structure of the range hood through the self-suction vent 121, ensuring the overall aesthetics of the range hood. Simultaneously, the closed state of the upper flap 32 and the lower flap 33 sealing the vent 121 prevents external debris from entering the range hood through the vent 121.

[0051] Both the upper flap 32 and the lower flap 33 are mounted on the base plate 31. Both the upper flap 32 and the lower flap 33 are rectangular plate structures, and their width when closed is greater than the opening width of the clearance channel 311. Specifically, the width of the upper flap 32 is equal to, or the width of the upper flap 32 is greater than the width of the lower flap 33, or the width of the upper flap 32 is less than the width of the lower flap 33.

[0052] As one of the parallel installation methods in this embodiment, both the upper flap 32 and the lower flap 33 can be rotatably connected to the base plate 31. They can close the air intake 121 by rotating simultaneously towards each other, and open the air intake 121 by rotating simultaneously away from each other. As another parallel installation method in this embodiment, both the upper flap 32 and the lower flap 33 can be slidably installed on the base plate 31. When they slide towards each other, they close the air intake 121; when they slide away from each other, they open the air intake 121.

[0053] The upper flap 32 is rotatably connected above the clearance passage 311, and the lower flap 33 is rotatably connected below the clearance passage 311. The upper flap 32 and the lower flap 33 rotate relative to each other and open or close the clearance passage 311.

[0054] When cooking is complete, the upper flap 32 rotates along its axis of rotation, causing its free end to rotate towards the opening of the clearance channel 311. Simultaneously, the lower flap 33 rotates along its axis of rotation, causing its free end to rotate towards the opening of the clearance channel 311. This causes the upper flap 32 and the lower flap 33 to rotate relative to each other and close the clearance channel 311, thereby sealing the air intake 121. Similarly, during cooking, the upper flap 32 and the lower flap 33 rotate relative to each other and open the clearance channel 311, thus opening the air intake 121. At this time, the range hood can be turned on to perform fume extraction.

[0055] The rotation axis of the upper flap 32 and the rotation axis of the lower flap 33 are located on the same plane, and this plane is parallel to the surface of the substrate 31, so as to ensure that when the upper flap 32 and the lower flap 33 rotate relative to each other and close the clearance channel 311, the ends of the upper flap 32 and the lower flap 33 can abut against each other and achieve closure.

[0056] The upper flap 32 is rotatably connected to the lower part of the clearance passage 311, and the lower flap 33 is rotatably connected to the upper part of the clearance passage 311. The upper flap 32 and the lower flap 33 rotate relative to each other and open or close the clearance passage 311.

[0057] The smoke hood of this utility model, such as Figure 7 and Figure 8 As shown, the upper and lower edges of the clearance passage 311 are provided with a plurality of rotating seats 312, the lower edge of the upper flap 32 is provided with a plurality of upper rotating blocks 321, and the lower edge of the lower flap 33 is provided with a plurality of lower rotating blocks 331. The upper rotating blocks 321 are rotatably connected to the rotating seats 312 at the upper edge of the clearance passage 311, and the lower rotating blocks 331 are rotatably connected to the rotating seats 312 at the lower edge of the clearance passage 311. In the first state, the upper edges of the upper flap 32 and the lower flap 33 approach each other and abut against each other. In the second state, the upper edges of the upper flap 32 and the lower flap 33 move away from each other.

[0058] A plurality of rotating blocks 312 on the upper edge of the clearance channel 311 and a plurality of upper rotating blocks 321 on the upper flap 32 are located on the same straight line, and the upper rotating blocks 321 are rotatably connected to the corresponding plurality of rotating blocks 312 on the upper edge of the clearance channel 311 to ensure the rotational stability of the upper flap 32. A plurality of rotating blocks 312 on the lower edge of the clearance channel 311 and a plurality of lower rotating blocks 331 on the lower flap 33 are located on the same straight line, and the lower rotating blocks 331 are rotatably connected to the corresponding plurality of rotating blocks 312 on the lower edge of the clearance channel 311 to ensure the rotational stability of the lower flap 33. This ensures that the upper flap 32 and the lower flap 33 stably close the clearance channel 311.

[0059] The cooperation between each rotary base 312 and the upper rotary block 321 and the lower rotary block 331 respectively allows for smoother rotation of the upper flip plate 32 and the lower flip plate 33. Based on the above embodiment, the rotary base 312 and the corresponding upper rotary block 321 can be connected by a rotating shaft and bearing, and the rotary base 312 and the corresponding lower rotary block 331 can also be connected by a rotating shaft and bearing. This effectively reduces frictional resistance during rotation, making the upper flip plate 32 and the lower flip plate 33 more flexible when rotating in opposite directions to close or open the avoidance channel 311, making operation more convenient, and improving the efficiency of the equipment.

[0060] The rotary base 312, upper rotary block 321, and lower rotary block 331 are independently configured. During installation, the rotary base 312 can be fixed to the edge of the clearance channel 311 first, and then the upper rotary block 321 and lower rotary block 331 can be connected to their respective rotary bases 312. The installation process is relatively simple and easy to operate. In later maintenance, if wear or other problems occur with the rotary base 312, upper rotary block 321, and / or lower rotary block 331, replacement and repair can be carried out relatively easily, reducing maintenance costs and difficulty. Furthermore, in different application scenarios, different specifications and types of rotary bases 312, upper rotary block 321, and lower rotary block 331 can be selected according to specific needs to adapt to different working conditions and usage requirements. For example, in high-humidity environments, rotary bases 312, upper rotary block 321, and lower rotary block 331 can be made of corrosion-resistant materials to improve the environmental adaptability of the device.

[0061] Based on the above embodiments, each rotating base 312 is positioned close to the upper and lower edges of the clearance channel 311, so that the width of the upper flap 32 and the lower flap 33 is as small as possible, reducing the rotation radius of the upper flap 32 and the lower flap 33 and reducing the installation space occupied.

[0062] Multiple rotating seats 312 are spaced apart at the upper and lower edges of the clearance passage 311. Multiple upper rotating blocks 321 are distributed on the upper flap 32, and multiple lower rotating blocks 331 are distributed on the lower flap 33. Each upper rotating block 321 is located on both sides of each rotating seat 312 at the upper edge of the clearance passage 311, and each lower rotating block 331 is located on both sides of each rotating seat 312 at the lower edge of the clearance passage 311. Each upper rotating block 321 and each rotating seat 312 can be rotated and installed simultaneously through a rotating shaft (not shown in the figure), and each lower rotating block 331 and each rotating seat 312 can be rotated and installed simultaneously through another rotating shaft (not shown in the figure).

[0063] The upper flap 32 and lower flap 33 rotate to a state parallel to the base plate 31 and close the clearance channel 311. When cooking is complete, as the upper flap 32 and lower flap 33 rotate towards each other and close the clearance channel 311, both are parallel to the base plate 31, forming a planar structure. This results in a smoother, flatter surface without any protruding parts or uneven surfaces, enhancing the overall aesthetics of the equipment. This is particularly valuable for range hoods where appearance is critical. Furthermore, the smooth surface, free of complex bumps or gaps, facilitates cleaning and maintenance by allowing customers to access the air intake 121, contributing to a cleaner and more hygienic environment.

[0064] The smoke hood of this utility model, such as Figure 7 and Figure 8 As shown, the second drive assembly 34 includes a drive component and a transmission component. The drive component includes a second drive motor 341, and the output of the second drive motor 341 is connected to a second drive gear 342. The transmission component includes a first rack 343 and a second rack 344. The first rack 343 and the second rack 344 are located on both sides of the second drive gear 342 and are both meshed with the second drive gear 342. The second drive gear 342 drives the first rack 343 and the second rack 344 to move in opposite directions. The first rack 343 is connected to the upper flip plate 32, and the second rack 344 is connected to the lower flip plate 33.

[0065] When cooking is finished and the range hood is turned off, the second drive motor 341 is activated, which drives the second drive gear 342 to rotate. The first rack 343 and the second rack 344, which are simultaneously meshed with the second drive gear 342, move simultaneously in opposite directions, and the overall length formed by the first rack 343 and the second rack 344 is shortened. At this time, the upper flap 32 and the lower flap 33, which are respectively connected to the first rack 343 and the second rack 344, move simultaneously in opposite directions, causing the clearance channel 311 to close. This is the first state.

[0066] During the cooking process, the second drive motor 341 is activated, which drives the second drive gear 342 to rotate in the opposite direction. The first rack 343 and the second rack 344, which are simultaneously meshed with the second drive gear 342, move in opposite directions at the same time. The overall length formed by the first rack 343 and the second rack 344 increases. At this time, the upper flap 32 and the lower flap 33, which are respectively connected to the first rack 343 and the second rack 344, move in opposite directions at the same time, causing the clearance channel 311 to open. This is the second state.

[0067] The second drive motor 341 can be connected to the control system of the smoke machine. The control system sends commands to control the operation of the second drive motor 341, thereby realizing remote control of the upper flip plate 32 and the lower flip plate 33.

[0068] The transmission method, in which the second drive gear 342 simultaneously meshes with the first rack 343 and the second rack 344, ensures the stability and reliability of power transmission. It accurately transmits the power of the second drive motor 341 to the upper flap 32 and the lower flap 33, causing them to rotate in a predetermined direction and angle. This reduces slippage and vibration during transmission, ensuring the accurate opening and closing of the clearance channel 311. Simultaneously, the engagement of the second drive gear 342 with the first rack 343 and the second rack 344 ensures that the upper flap 32 and the lower flap 33 move towards or away from each other, avoiding problems such as incomplete closing or uneven opening of the clearance channel 311 due to asynchronous movements of the upper and lower flaps 32 and 33.

[0069] A slide block 313 is provided on the substrate 31. The slide block 313 is provided with an upper slide bar and a lower slide bar. The first rack 343 and the second rack 344 are slidably connected to the upper slide bar and the lower slide bar, respectively. The drive gear 342 is meshed between the first rack 343 and the second rack 344.

[0070] In this embodiment, the slide block 313 is fixedly connected to the base plate 31 so as to form a stable mounting base for the first rack 343 and the second rack 344 through the connection of the upper slide bar and the lower slide bar, thereby ensuring the stable sliding of the first rack 343 and the second rack 344.

[0071] As a specific embodiment, the slide block 313 has a "U"-shaped structure and opens laterally toward the clearance channel 311. The second drive gear 342 is rotatably mounted in the opening of the slide block 313, and the bottom of the slide block 313 has a through opening to form a through hole structure for the output shaft of the second drive motor 341 to pass through and achieve coaxial connection with the second drive gear 342. Specifically, one arm of the slide block 313 is located on the same plane as the base plate 31 and is fixedly connected to the base plate 31. A lower slide bar is fixedly connected to this arm to achieve sliding installation of the second rack 344. An upper slide bar is fixedly connected to the other arm of the slide block 313 to achieve sliding installation of the first rack 343.

[0072] The cross-sections of the upper and lower slide bars can be stepped or dovetail-shaped structures. The first rack 343 and the second rack 344 are provided with matching stepped or dovetail grooves to achieve sliding installation of the first rack 343 and the second rack 344, prevent the first rack 343 from detaching from the upper slide bar, prevent the second rack 344 from detaching from the lower slide bar, and ensure the stability of the first rack 343 and the second rack 344 during the sliding process.

[0073] The smoke hood of this utility model, such as Figure 7 and Figure 8 As shown, the upper flip plate 32 is provided with a plurality of upper connecting blocks 322, the lower flip plate 33 is provided with a plurality of lower connecting blocks 332, and the transmission component also includes a third pull rope 345. The free end of the third pull rope 345 connected to the upper connecting block 322 is connected to the first rack 343, and the free end of the third pull rope 345 connected to the lower connecting block 332 is connected to the second rack 344.

[0074] One of the third pull ropes 345 has its fixed end fixedly connected to each of the upper connecting blocks 322 on the upper flip plate 32, and the other third pull rope 345 has its fixed end fixedly connected to each of the lower connecting blocks 332 on the lower flip plate 33. When driven by the second drive motor 341 and transmitted by the second drive gear 342, causing the first rack 343 and the second rack 344 to move in opposite directions, the first rack 343 can pull the lower flip plate 33 through the other third pull rope 345, while the second rack 344 can pull the upper flip plate 32 through one of the third pull ropes 345. This allows the upper flip plate 32 and the lower flip plate 33 to move towards or away from each other, thus closing or opening the avoidance channel 311.

[0075] Based on the above embodiment, the upper connecting blocks 322 on the upper flap 32 are located on the same straight line and are spaced apart along the length of the upper flap 32, and the lower connecting blocks 332 on the lower flap 33 are located on the same straight line and are spaced apart along the length of the lower flap 33. The upper connecting blocks 322 on the upper flap 32 can be simultaneously fixedly connected to the inner or outer side of the upper flap 32, and the lower connecting blocks 332 on the lower flap 33 can be simultaneously fixedly connected to the inner or outer side of the lower flap 33, and the lower connecting blocks 332 on the lower flap 33 can be simultaneously fixedly connected to the outer side of the lower flap 33.

[0076] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A range hood, characterized in that, include: The main body of the range hood (1) has an air outlet at the top of the air collection box (11) of the main body of the range hood (1) and an air outlet seat (111) connected to the air outlet; the air intake panel (12) of the main body of the range hood (1) has an air intake (121). An air outlet adjustment component (2) is connected to the air outlet end of the air outlet seat (111) and is used to adjust the effective air outlet area of ​​the air outlet end of the air outlet seat (111). An air inlet opening and closing assembly (3) is connected to the rear side of the air intake panel (12) and is used to open or close the air intake (121).

2. The range hood according to claim 1, characterized in that, The air outlet adjustment assembly (2) includes a connecting pipe (21), a blade assembly (22), and a first drive assembly (23). The connecting pipe (21) is a hollow pipe. The blade assembly (22) is disposed inside the hollow pipe and includes a plurality of blades (221). The plurality of blades (221) are stacked on each other and form a smoke exhaust channel adapted to the inner diameter of the connecting pipe (21). The first drive assembly (23) is used to drive the blade assembly (22) so that the upper ends of the plurality of blades (221) move closer to each other and reduce the outlet of the smoke exhaust channel.

3. The range hood according to claim 2, characterized in that, The lower ends of several blades (221) are connected to the inner wall of the connecting pipe (21), and the first drive assembly (23) applies force to the upper ends of several blades (221) to reduce the outlet of the smoke exhaust channel.

4. The range hood according to claim 2, characterized in that, The first drive assembly (23) includes a first drive motor (231), a first drive gear (232), a gear ring (233), a first retraction rope (234), and a second retraction rope (235). A guide ring (211) is connected to the inner wall of the connecting pipe (21). The gear ring (233) is slidably connected to the guide ring (211). The first drive motor (231) is mounted on the connecting pipe (21), and its drive end is connected to the first drive gear (232). The first drive gear (232) meshes with the gear ring (233). Each blade (221) has a connecting block (2211) at its upper end. The first retraction rope (234) passes through a portion of the blade (221). 1) The connecting block (2211) on the blade (221) passes through the connecting block (2211) on another part of the blade (221). The first end of the first shrink rope (234) and the first end of the second shrink rope (235) are close to each other. The first end of the first shrink rope (234) is connected to the toothed ring (233). The first end of the second shrink rope (235) is connected to the connecting tube (21). The second end of the first shrink rope (234) and the second end of the second shrink rope (235) are close to each other. The second end of the first shrink rope (234) is connected to the connecting tube (21). The second end of the second shrink rope (235) is connected to the toothed ring (233).

5. The range hood according to claim 4, characterized in that, The inner wall of the connecting tube (21) is provided with a first connecting seat (212) connected to the second end of the first shrink rope (234) and a second connecting seat (213) connected to the first end of the second shrink rope (235). The first connecting seat (212) and the second connecting seat (213) are symmetrically arranged.

6. The range hood according to claim 2, characterized in that, The connecting pipe (21) is also provided with a flow guide sleeve (24), and the lower ends of several blades (221) are connected to the flow guide sleeve (24). The inner cylinder of the flow guide sleeve (24) is conical, and the inner diameter gradually decreases from bottom to top.

7. The smoke hood according to claim 1, characterized in that, The air inlet opening and closing assembly (3) includes a base plate (31), an upper flap (32), a lower flap (33), and a second drive assembly (34). The base plate (31) is provided with a clearance channel (311). The base plate (31) is connected to the rear side of the air intake panel (12). The clearance channel (311) is arranged around the air intake (121). The upper flap (32) is connected above the clearance channel (311). The lower flap (33) is connected below the clearance channel (311). The upper flap (32) and the lower flap (33) have a first state in which they are close to each other and close the clearance channel (311) and a second state in which they are far apart from each other and open the clearance channel (311). The second drive assembly (34) is used to drive the upper flap (32) and the lower flap (33) to switch between the first state and the second state.

8. The smoke hood according to claim 7, characterized in that, The upper and lower edges of the clearance channel (311) are provided with a plurality of rotating seats (312), the lower edge of the upper flip plate (32) is provided with a plurality of upper rotating blocks (321), and the lower edge of the lower flip plate (33) is provided with a plurality of lower rotating blocks (331). The upper rotating blocks (321) are rotatably connected to the rotating seats (312) at the upper edge of the clearance channel (311), and the lower rotating blocks (331) are rotatably connected to the rotating seats (312) at the lower edge of the clearance channel (311). In the first state, the upper edges of the upper flip plate (32) and the lower flip plate (33) approach each other and abut against each other. In the second state, the upper edges of the upper flip plate (32) and the lower flip plate (33) move away from each other.

9. The range hood according to claim 7, characterized in that, The second drive assembly (34) includes a drive component and a transmission component. The drive component includes a second drive motor (341), and the output of the second drive motor (341) is connected to a second drive gear (342). The transmission component includes a first rack (343) and a second rack (344). The first rack (343) and the second rack (344) are located on both sides of the second drive gear (342). The second drive gear (342) drives the first rack (343) and the second rack (344) to move in opposite directions. The first rack (343) is connected to the upper flip plate (32), and the second rack (344) is connected to the lower flip plate (33).

10. The range hood according to claim 9, characterized in that, The upper flip plate (32) is provided with a plurality of upper connecting blocks (322), the lower flip plate (33) is provided with a plurality of lower connecting blocks (332), and the transmission component also includes a third pull rope (345). The free end of the third pull rope (345) connected to the upper connecting block (322) is connected to the first rack (343), and the free end of the third pull rope (345) connected to the lower connecting block (332) is connected to the second rack (344).

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