Range hood air volume adjusting valve and range hood

Abstract

The utility model relates to a range hood air volume adjusting valve and a range hood, and belongs to the field of range hoods. The range hood air volume adjusting valve comprises a fixing assembly, a blade assembly, a linkage mechanism, an air speed sensor, a driving mechanism and a controller; the fixing assembly comprises a mounting frame, the mounting frame comprises an air inlet, a sealing plate and a plurality of rotating shafts are arranged on the inner wall of the mounting frame, the sealing plate and the rotating shafts are located on the inner walls, perpendicular to each other, of the mounting frame, the blade assembly comprises a plurality of sub-blades arranged in parallel, and the two ends of each sub-blade are each fixedly connected with one rotating shaft. The blade assembly comprises a full-closed state and a full-open state, and when the blade assembly is in the full-closed state, the sub-blades located on the outer side are in lap joint with the sealing plate; the linkage mechanism is used for achieving synchronous rotation of the multiple sub-blades. The wind speed sensor is arranged on the inner wall of the mounting frame and / or the sub-blade; the driving mechanism is used for driving the blade assembly to open and close; and the wind speed sensor and the driving mechanism are electrically connected with the controller. The problems that the opening degree of an exhaust valve of a range hood is fixed, and the exhaust air rate cannot be adjusted are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of range hood, especially to a range hood air volume regulating valve and range hood. BACKGROUND

[0002] The range hood exhaust valve is a key component in the range hood exhaust system, mainly used to ensure smooth exhaust of oil fume, control one-way flow of air flow, and prevent external air, odor or oil fume from flowing back into the room. The range hood exhaust valve is also the "gatekeeper" of the exhaust volume, and its opening degree directly affects the exhaust volume, thereby determining the actual smoke exhaust efficiency of the range hood. In daily life, cooking scenes are diverse, and the amount of oil fume generated by different cooking methods (such as frying, stir-frying, cooking, frying, stewing, boiling, etc.) and various food materials varies greatly. At the same time, the pressure of the public flue is not constant, and changes with the use of the range hood by users on different floors and outdoor environmental factors (such as wind speed, air pressure, etc.). Based on this, in order to meet the cooking needs under various complex conditions and maintain the balance of the pressure of the public flue, the range hood has diversified requirements for the size of the exhaust volume.

[0003] The traditional fixed-opening exhaust valve will cause obstruction of oil fume exhaust when facing cooking methods that generate a large amount of oil fume, such as stir-frying, because it cannot expand the ventilation area according to the sharp increase in the amount of oil fume. This is like a narrow passageway that cannot be widened in the face of a surging crowd, causing oil fume to accumulate in the kitchen and making the air in the kitchen dirty and smelly, which not only affects the cooking experience, but also may pose a potential threat to human health in the long term. In particular, when encountering adverse environmental conditions such as headwinds or low air pressure, the limitations of the fixed exhaust valve are more pronounced, as it cannot automatically increase the opening degree to overcome these additional resistances, further reducing the smoke exhaust efficiency and even causing a vicious cycle of oil fume backflow, making the kitchen filled with oil fume. On the other hand, during light oil fume cooking, a fixed large exhaust volume will cause serious waste of energy - the fan has to run at a high power all the time, consuming a large amount of unnecessary electric energy and causing energy waste. In the long run, it will increase the user's electricity bill. Moreover, since the fan needs to maintain a large rotational speed to maintain a fixed ventilation volume, it will produce a lot of noise during operation. More seriously, the long-term operation of the fan in a high-load state will accelerate the wear and tear of the motor, impeller and other components, and the long-term overheating operation of the motor will cause performance degradation, and the key components such as the impeller will also accelerate aging due to continuous stress, which will shorten the service life of the entire machine. This "one-size-fits-all" design obviously cannot meet the comprehensive needs of modern kitchens for energy efficiency, comfort and equipment durability, and it is urgent to realize intelligent adjustment of the exhaust valve through technological innovation. SUMMARY

[0004] In view of this, the utility model provides a kind of range hood air volume regulating valve and range hood, to solve the technical problem mentioned in the above background art.

[0005] To achieve the above object, the utility model provides a kind of range hood air volume regulating valve, it is characterized in that, including fixed component, vane component, linkage mechanism, wind speed sensor, drive mechanism and controller;

[0006] The fixed component includes mounting frame, the mounting frame includes air inlet, the inner wall of the mounting frame is provided with sealing plate and multiple rotating shafts, and the sealing plate and the rotating shaft are located on the inner wall perpendicular to the mounting frame respectively, the vane component includes multiple sub-vanes arranged in parallel, both ends of each sub-vane are fixedly connected with a rotating shaft, the vane component includes full-closed state and full-open state, when the vane component is in full-closed state, the outer sub-vane in the sub-vane and the sealing plate are lapped;

[0007] The linkage mechanism is used to realize the synchronous rotation of the multiple sub-vanes;

[0008] The wind speed sensor is arranged on the inner wall of the mounting frame and / or the sub-vane;

[0009] The drive mechanism is used to drive the opening and closing of the vane component;

[0010] The wind speed sensor and the drive mechanism are electrically connected with the controller.

[0011] Optionally, the linkage mechanism includes linkage rod and multiple limit blocks, one end of each limit block is fixedly connected with a sub-vane, and the other end is rotatably connected with the linkage rod, when the vane component is in full-closed state or full-open state, the limit block reaches the maximum allowable angle relative to the linkage rod.

[0012] Optionally, the limit block is in a stepped shape, the limit block includes first kick surface, first tread surface, second kick surface and second tread surface, the first kick surface is rotatably connected with the linkage rod, and the second tread surface is fixedly connected with the sub-vane.

[0013] Optionally, a groove is arranged on the sub-vane along its length direction, and the rotating shaft is located in the groove.

[0014] Optionally, the mounting frame is in a rectangular frame structure as a whole, and is surrounded by four edge frames connected end to end, the rotating shafts are arranged on the opposite two edge frames, and the sealing plates are arranged on the other two opposite edge frames.

[0015] Optionally, the edge frame includes mounting cabin, and the drive mechanism and the controller are located in the mounting cabin.

[0016] Optionally, the fixing assembly further comprises an internally hollow mounting shell, the mounting shell comprising an air exhaust channel, and the mounting frame is arranged at an entrance of the air exhaust channel.

[0017] Optionally, an exit of the air exhaust channel is arranged on another face of the mounting shell, the another face being any face other than the face where the entrance of the air exhaust channel is located.

[0018] Optionally, the mounting shell comprises a U-shaped surrounding plate and two cover plates, the two cover plates being arranged at two side openings of the U-shaped surrounding plate respectively, and the mounting frame is arranged at a top opening of the U-shaped surrounding plate.

[0019] Optionally, a U-shaped keel is arranged on the U-shaped surrounding plate, the U-shaped keel comprising two clamping grooves, and inwardly bent first edges are arranged on two side edges of side plates of the U-shaped surrounding plate, inwardly bent second edges are arranged at connecting positions of the side plates of the U-shaped surrounding plate and the cover plates, the first edges and the second edges are located in the clamping grooves, and at least one of the two cover plates is fixed with the mounting frame.

[0020] In addition, to achieve the above-mentioned purpose, the utility model also provides a range hood, comprising the range hood air volume regulating valve of any one of the preceding. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0022] In order to more completely understand the present application and its beneficial effects, the following will be described with reference to the drawings. In the following description, the same reference numerals represent the same parts.

[0023] Figure 1 It is a structural schematic diagram of the range hood air volume regulating valve of an embodiment of the present application;

[0024] Figure 2 It is a left view exploded schematic diagram of the range hood air volume regulating valve of an embodiment of the present application;

[0025] Figure 3 It is a schematic diagram of part of the structure of the range hood air volume regulating valve of an embodiment of the present application;

[0026] Figure 4 It is a structural schematic diagram of the range hood air volume regulating valve of an embodiment of the present application; Figure 3 It is an enlarged schematic diagram of V1 part in the middle;

[0027] Figure 5An exploded schematic view of a linkage assembly of a range hood air volume regulating valve according to an embodiment of the present application;

[0028] Figure 6 A front view schematic view of a partial structure of a range hood air volume regulating valve according to an embodiment of the present application;

[0029] Figure 7 A schematic view of a frame 113 of a range hood air volume regulating valve according to an embodiment of the present application;

[0030] Figure 8 An exploded schematic view of a partial structure of a range hood air volume regulating valve according to an embodiment of the present application;

[0031] Figure 9 An exploded schematic view of a range hood air volume regulating valve according to an embodiment of the present application;

[0032] Figure 10 A schematic view of a range hood air volume regulating valve according to an embodiment of the present application;

[0033] Figure 11 An exploded schematic view of a partial structure of a range hood air volume regulating valve according to an embodiment of the present application;

[0034] Figure 12 A schematic view of a V1 part according to an embodiment of the present application; Figure 11 An enlarged schematic view of a V3 part according to an embodiment of the present application;

[0035] Figure 13 A schematic view of a V2 part according to an embodiment of the present application; Figure 11 An enlarged schematic view of a V5 part according to an embodiment of the present application;

[0036] Figure 14 A schematic view of a second cover plate 135 of a range hood air volume regulating valve according to an embodiment of the present application; Figure 11

[0037] A left view schematic view of a partial structure of a range hood air volume regulating valve according to an embodiment of the present application; Figure 15

[0038] An enlarged schematic view of a V4 part according to an embodiment of the present application. Figure 16 DETAILED DESCRIPTION

[0039] Figure 17 A schematic view of a V1 part according to an embodiment of the present application; Figure 11 An enlarged schematic view of a V4 part according to an embodiment of the present application. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0041] Reference Figures 1-8 The oil fume extractor air volume regulating valve described in the present application comprises a fixed assembly, a blade assembly 2, a linkage mechanism 3, a wind speed sensor (not shown in the figure), a driving mechanism 5 and a controller (not shown in the figure).

[0042] The fixed assembly comprises a mounting frame 11, which is in the overall structure of a rectangular frame and is formed by connecting the first side frame 111, the second side frame 112, the third side frame 113 and the fourth side frame 114 in sequence, and the through area inside the mounting frame 11 is the air inlet 115 of the mounting frame 11. The connection methods of the four side frames include but are not limited to welding, bolt connection, riveting and clamping, etc. In actual application, appropriate connection methods can be selected according to different needs. For example, welding can be used in environments with high requirements for connection strength and air tightness. If it is required to facilitate installation and disassembly for the purpose of facilitating later maintenance and repair work, bolt connection is a relatively ideal choice. In other embodiments, the mounting frame 11 can also be in other structures, for example, integrally cast, directly formed into a complete rectangular frame body through a casting process. The advantage of this method is high structural strength and good integrity. The present application does not limit this.

[0043] The first side frame 111 and the third side frame 113 are oppositely arranged, and the second side frame 112 and the fourth side frame 114 are also oppositely arranged. The first side frame 111 and the third side frame 113 are both perpendicular to the second side frame 112 and the fourth side frame 114. The mounting frame 11 provides a stable mounting basis for the blade assembly 2, ensuring the stability and accuracy of the blade assembly 2 during operation.

[0044] On the inner wall of the mounting frame 11, the second side frame 112 and the fourth side frame 114 are both provided with a sealing plate 116. Meanwhile, on the first side frame 111 and the third side frame 113, a plurality of rotating shafts 12 are provided. Referring to Figure 8 The installation of the rotating shaft 12 on the first side frame 111 can be through interference fit shaft sleeves. Specifically, a first mounting hole 1111 with a size matching the outer diameter of the rotating shaft 12 is formed on the first side frame 111, and then the shaft sleeve 1112 is pressed into the first mounting hole 1111 in an interference fit manner. The shaft sleeve 1112 is usually made of wear-resistant materials such as copper alloy. Interference fit means that the outer diameter of the shaft sleeve 1112 is slightly larger than the inner diameter of the first mounting hole 1111. The rotating shaft 12 passes through the shaft sleeve 1112, which can reduce the wear between the rotating shaft 12 and the first side frame 111, and the interference fit ensures the stability of the shaft sleeve 1112 in the first side frame 111. Similarly, when installing the rotating shaft 12 on the third side frame 113, the installation structure and method on the first side frame 111 can be referred to. This method is suitable for the case where the rotating shaft 12 needs to be frequently rotated, which can prolong the service life of the rotating shaft 12 and the entire structure.

[0045] A gasket 121 is arranged on the rotating shaft 12, which separates the sub-blades 21 and the first frame 111 to avoid direct contact and friction between them during the rotation of the sub-blades 21, thereby protecting the surfaces of the sub-blades 21 and the first frame 111, reducing wear and noise, and also helping to ensure the flexibility and stability of the rotation of the sub-blades 21.

[0046] Reference Figures 1-2 The blade assembly 2 includes a plurality of parallelly arranged sub-blades 21, each of which is fixedly connected to a rotating shaft 12 at both ends, and the blade assembly 2 includes a fully closed state and a fully open state.

[0047] When the blade assembly 2 is in the fully closed state, the plurality of parallelly arranged sub-blades 21 are sequentially overlapped, thereby being closely fitted, and the outer sub-blades 21 are overlapped with the sealing plate 116 on the inner wall of the mounting frame 11 and located on the second frame 112 and the fourth frame 114, forming a sealing structure. From the overall appearance, the blade assembly presents a complete plane, completely blocking the air inlet 115 of the mounting frame 11, and in this state, the airflow is effectively blocked and cannot enter the range hood exhaust system through the air inlet, thereby eliminating leakage when the range hood is not used or needs to be completely blocked.

[0048] When the blade assembly 2 is in the fully open state, the sub-blades 21 are nearly perpendicular to the air inlet plane and are uniformly spaced from each other, and each sub-blade 21 hardly hinders the airflow. In this state, the range hood can work at the maximum air volume, quickly discharging the oil fume generated in the kitchen to the outside, and maximizing the demand for strong oil fume exhaust during cooking to ensure that the kitchen air is purified in time.

[0049] Reference Figures 3-5 The linkage mechanism 3 includes a linkage rod 31 and a plurality of limiting blocks 32, the linkage rod 31 is in a U shape, one side of which includes a blocking edge 311 and the other side includes a connecting edge 312, and the plurality of limiting blocks 32 are uniformly distributed on one side of the connecting edge 312. The blocking edge 311 and the connecting edge 312 can be integrally formed or can be fixedly connected as two independent structures, and the limiting blocks 32 correspond in number to the sub-blades 21. In other embodiments, the linkage rod 31 can also have other structures, such as a planar structure.

[0050] One end of each limiting block 32 is fixedly connected to one sub-blade 21, and the fixed connection can be achieved by welding, which can provide firm connection strength and ensure that the limiting block 32 and the sub-blade 21 will not be separated during long-term use.

[0051] The bolt connection is adopted in the embodiment, a first threaded hole 3241 is processed on the limiting block 32, and a second threaded hole (not shown in the figure) is processed on the corresponding position of the sub-blade 21, the bolt fastening is convenient for later maintenance and replacement.

[0052] The other end of the limiting block 32 is rotatably connected with one end of the connecting edge 312 of the linkage rod 31. The specific rotatable connection structure can be that a connecting lug 3121 with an inner hole 3122 is arranged on the connecting edge 312 of the linkage rod 31, a second mounting hole 3211 is formed on the limiting block 32 at the connecting position of the linkage rod 31, and a pin shaft 33 passes through the second mounting hole 3211 and the inner hole 3122 of the connecting lug 311, so that the limiting block 32 can rotate relative to the linkage rod 31 around the pin shaft 33. The length of the linkage rod 31 is customized according to the overall size of the range hood air volume adjusting valve and the distribution interval of the sub-blades 21, and needs to ensure that each limiting block 32 can be effectively connected.

[0053] When the blade assembly 2 is in the fully closed state, the sub-blades 21 are sequentially overlapped, at this time, the limiting block 32 rotates around the linkage rod 31 to a specific angle, which is one of the maximum allowed rotation angles relative to the linkage rod 31. At this position, the limiting block 32 is limited by a pre-set limiting structure, such as a limiting baffle installed on the linkage rod 31, or a protrusion arranged on the rotation path of the limiting block 32, thereby preventing the limiting block 32 from continuing to rotate, ensuring that the sub-blades 21 maintain the fully closed state, and realizing effective sealing of the air inlet 115. Similarly, when the blade assembly 2 is in the fully open state, the sub-blades 21 are parallel to each other and located in different planes, the limiting block 32 rotates around the linkage rod 31 to the other maximum allowed rotation angle. At this time, the limiting edge 311 can prevent the limiting block 32 from rotating excessively, so as to ensure that the sub-blades 21 remain in the fully open state, and the airflow can pass through the air inlet 115 to the maximum extent.

[0054] In the embodiment, the linkage mechanism 3 includes the linkage rod 31 and a plurality of limiting blocks 32, each sub-blade 21 is fixedly connected with a corresponding limiting block 32 at one end, and a motion transmission link is built, so that the motion of the sub-blade 21 and the limiting block 32 can be transmitted to each other. When the sub-blade 21 rotates, the limiting block 32 connected with the sub-blade 21 also rotates. Since the other end of the limiting block 32 is connected with the linkage rod 31, the rotation path and angle of the linkage rod 31 can be constrained. The linkage rod 31 constrains the rotation path and angle of the limiting block 32, so that all the sub-blades 21 maintain consistent rotation direction, speed and rotation angle change, if part of the sub-blades 21 rotate abnormally, the linkage rod 31 will exert a reverse force on it through the normally rotating limiting block 32, so as to restore synchronization. This cooperative matching ensures that the rotation direction, speed and rotation angle of all the sub-blades 21 are consistent, and synchronous rotation is realized.

[0055] In other embodiments, the linkage mechanism 3 can also be other structures, such as installing gears of the same specification at the same end of each rotating shaft 12. These gears mesh with each other, and when one gear is driven to rotate, the meshing transmission between the gears will drive the other gears to rotate synchronously, thereby causing the sub-blades 21 mounted on the rotating shaft 12 to rotate synchronously. This method can ensure high synchronization accuracy, and gears with different modules and numbers of teeth can be selected as needed to adjust the transmission ratio to adapt to the size and operating requirements of different range hood airflow regulating valves.

[0056] The wind speed sensor is mounted on the inner wall of the mounting frame 11 or on the sub-blade 21. The wind speed sensor measures the real-time wind speed at the air inlet 115, providing accurate wind speed data for the range hood's airflow regulating valve. When mounted on the inner wall of the mounting frame 11, the wind speed sensor is less affected by the rotation of the sub-blade 21, allowing it to stably acquire the original airflow speed. Furthermore, installation and maintenance are relatively convenient, eliminating the need for frequent disassembly of the blade assembly 2. When mounted on the sub-blade 21, the wind speed sensor can acquire wind speed data closer to the actual control position. Because the rotation of the sub-blade 21 directly affects the airflow state at the air inlet 115, the wind speed sensor on the sub-blade 21 can provide more accurate feedback when the opening of the sub-blade 21 needs fine-tuning. The wind speed sensor can be any wind speed sensor available in the prior art; this embodiment does not limit its use.

[0057] In this embodiment, reference Figure 7 The third frame 113 includes a frame body 1131 and a mounting compartment 1133. A first connection hole (not shown) is provided inside the frame body 1131. The drive mechanism 5 and the controller (not shown) are located inside the mounting compartment. The drive mechanism 5 is an electric actuator. To protect the drive mechanism 5 and the controller from oil fumes, dust, etc., the mounting compartment 1133 is sealed with a sealing plate 1132. The sealing plate 1132 and the frame body 1131 can be sealed with a sealing strip to prevent oil fumes and dust from entering the mounting compartment 1133. Simultaneously, the mounting compartment 1133 can also be equipped with heat dissipation holes or a cooling fan to ensure that the heat generated by the drive mechanism 5 and the controller during operation can be dissipated in a timely manner, ensuring their normal operation.

[0058] The drive mechanism 5 includes a second connecting hole 51, and the positions of the first connecting hole and the second connecting hole 51 are corresponding. When one end of a rotating shaft 12 is inserted into the first connecting hole and the second connecting hole 51, the drive mechanism 5 can drive the rotating shaft 12 to rotate, thereby driving the sub-blades 21 connected to the rotating shaft 12 to rotate. Through the action of the linkage mechanism 5, the synchronous rotation of all sub-blades 21 is realized, thereby realizing the opening adjustment of the blade assembly 2.

[0059] In other embodiments, the driving mechanism can also be composed of a motor, a screw rod, and a nut. The output shaft of the motor is connected to the screw rod through a coupling, and the nut is fixed together with the linkage rod. The nut is sleeved on the screw rod. When the motor is powered on and rotates, it drives the screw rod to rotate. Due to the threaded connection between the nut and the screw rod, the nut will move linearly along the axial direction of the screw rod, thereby pushing or pulling the linkage rod connected thereto. By controlling the forward and reverse rotation of the motor, the pushing and pulling actions of the linkage rod can be realized. The rotation speed of the motor can control the movement speed of the linkage rod, and the rotation angle of the motor can accurately control the displacement of the linkage shaft. By controlling the reciprocating motion of the linkage rod 31, the limiting block 32 and the sub-blade 21 connected to the linkage rod 31 are driven to rotate, thereby realizing the opening and closing actions of the blade assembly 2.

[0060] The wind speed sensor and the driving mechanism 5 are electrically connected to the controller. The controller can be any controller in the prior art. The principle of the controller controlling the driving mechanism 5 according to the detection result of the wind speed sensor also belongs to the content of the prior art, and will not be described here.

[0061] The principle and beneficial effects of the present embodiment are as follows: The wind speed sensor located on the inner wall of the mounting frame and / or the sub-blade monitors the wind speed at the air inlet of the mounting frame in real time, and transmits the measured wind speed data to the controller. The controller pre-stores a preset wind speed value. After receiving the real-time wind speed data from the wind speed sensor, the current wind speed is compared with the preset wind speed.

[0062] If the current wind speed is greater than the preset wind speed, it means that the amount of oil fume generated in the kitchen is large, and a larger ventilation volume is needed to timely exhaust the oil fume. At this time, the controller sends an instruction to the driving mechanism, and the driving mechanism starts to work. Since the driving mechanism is connected to one of the rotating shafts, it drives the rotating shaft to rotate, thereby driving the sub-blade connected thereto to rotate. The rotation of the sub-blade is transmitted to other sub-blades through the linkage mechanism. The linkage rod and the limiting block in the linkage mechanism work together to make all the sub-blades rotate synchronously, thereby increasing the opening degree of the blade assembly and expanding the ventilation area. In this way, a large amount of oil fume can be timely and efficiently exhausted, avoiding the accumulation of oil fume in the kitchen, preventing the kitchen air from being polluted, ensuring the indoor air quality, improving the cooking experience, and reducing the potential threat to human health.

[0063] At the same time, when encountering adverse environmental conditions such as headwind or low pressure, the traditional fixed-opening exhaust valve cannot automatically increase the opening degree to overcome the resistance. At this time, if the current wind speed detected by the wind speed sensor is greater than the preset wind speed, the adjusting valve also controls the driving mechanism through the controller to increase the opening degree of the blade assembly, automatically adapt to the adverse environment, overcome the additional resistance, improve the exhaust efficiency, avoid the backflow of oil fume, and keep the air in the kitchen fresh.

[0064] On the contrary, when the current wind speed is less than the preset wind speed, it indicates that the amount of oil fume in the kitchen is less, and a large amount of ventilation is not needed. In order to avoid energy waste, the controller sends a reverse command to the driving mechanism. The driving mechanism performs a reverse operation, drives the rotating shaft connected thereto to rotate reversely, and then synchronously drives all the sub-blades to rotate reversely through the linkage mechanism, reduces the opening of the blade assembly, reduces the ventilation area, and reduces the exhaust air volume. In this way, the fan does not need to run continuously at high power, unnecessary power consumption is reduced, and the user's electricity bill is reduced. At the same time, the fan speed is reduced, the operating noise is reduced, and the comfort of the kitchen environment is improved. Moreover, the fan is no longer in a high-load running state for a long time, the wear of the motor, impeller and other components is significantly reduced, the motor overheating phenomenon is reduced, the aging speed of the impeller is reduced, the service life of the whole machine is effectively prolonged, the comprehensive demand of modern kitchen for energy efficiency, comfort and equipment durability is met, and the intelligent adjustment of the regulating valve is realized.

[0065] In the whole control process, the wind speed sensor continuously monitors the wind speed of the inlet, and the controller dynamically adjusts the action of the driving mechanism according to the comparison result of the real-time wind speed and the preset wind speed, so as to accurately control the deflection angle of the blade assembly and realize automatic adjustment of the air volume to adapt to different oil fume generation conditions in the kitchen.

[0066] Reference Figures 4-5 In some embodiments, the limiting block 32 of the oil fume machine air volume regulating valve is in a stepped shape, which specifically includes a first kick surface 321, a first tread surface 322, a second kick surface 323 and a second tread surface 324 connected in sequence. One end of the first kick surface 321 is rotationally connected with the linkage rod, the first tread surface 322 is perpendicular to the first kick surface 321 and the second kick surface 323, the second tread surface 324 is in a perpendicular state with the second kick surface 323, and the end thereof is fixedly connected with the sub-blade.

[0067] In the embodiment, the first kick surface is rotationally connected with the linkage rod, which provides a basis for the rotation of the sub-blade. The stepped structure limits the rotation angle of the sub-blade through the geometric relationship between the tread surface and the kick surface, avoids excessive or insufficient angle, ensures that the blade assembly closely fits when fully closed and maintains appropriate spacing when fully opened, and realizes accurate air volume adjustment. On the other hand, the stepped design greatly enhances the structural stability. Compared with ordinary flat plates, it increases the connection strength with the linkage rod and the sub-blade, can better withstand forces in the environment of frequent blade rotation and possible vibration, reduces loosening and deformation, and prolongs the service life of the air volume regulating valve.

[0068] Reference Figure 6In some embodiments, a groove 211 is formed along the length of the sub-blade 21 of the range hood air volume regulating valve, and the groove 211 is preferably triangular in shape. The length of the sub-blade 21 is actually consistent with the axial direction of the rotating shaft 12, and the rotating shaft 12 is arranged in the groove 211. The groove 211 can be formed by milling, i.e., a milling cutter is used to cut the groove 211 on the surface of the sub-blade 21 according to the predetermined size and shape requirements. Alternatively, the groove 211 can be formed by mold forming, i.e., a corresponding protruding structure is designed on the mold for manufacturing the sub-blade 21, and the groove 211 is directly formed when the sub-blade 21 is formed, thereby ensuring the consistency and precision of the groove 211. The rotating shaft 12 and the sub-blade 21 can be fixed by applying an appropriate amount of special adhesive in the groove 211, and the adhesive can effectively prevent the rotating shaft 12 from moving in the groove 211 after solidification. Alternatively, the rotating shaft 12 can be fixed in the groove 211 by mechanical fixation, such as by arranging a clamp or a positioning pin on both sides of the groove 211.

[0069] In this embodiment, the groove is arranged along the length of the sub-blade, and the rotating shaft is fixed in the groove. The groove provides precise positioning for the rotating shaft, so that the position of the rotating shaft in the groove is relatively fixed, which can effectively limit the movement of the sub-blade in the radial direction. During frequent rotation of the blade assembly, the radial misalignment or shaking between the sub-blade and the rotating shaft is avoided, thereby ensuring the tightness and stability of the connection between the sub-blade and the rotating shaft. In addition, the groove protects the rotating shaft to some extent, which can reduce the erosion of the rotating shaft by external dust, oil stains and other impurities, thereby prolonging the service life of the rotating shaft.

[0070] In some embodiments, the sub-blade 21 is provided with a first sealing end 212 at one end and a second sealing end 213 at the other end. When the blade assembly 2 is in the closed state, the first sealing end 212 of one sub-blade and the second sealing end 213 of another sub-blade are overlapped.

[0071] The first sealing end 212 is located at one end of the sub-blade 21, which can be a protruding structure such as a rectangular or trapezoidal boss, or a rim wrapped with elastic sealing material such as rubber. Similarly, the second sealing end 213 is located at the other end of the sub-blade 21, and its structure is adapted to the first sealing end 212. If the first sealing end 212 is a boss structure, the second sealing end 213 can be a corresponding groove structure, so that the two can be precisely docked when the blade assembly 2 is in the closed state.

[0072] When the blade assembly 2 is in the closed state, each sub-blade 21 is closely arranged with each other. At this time, the sealing connection between adjacent sub-blades 21 is achieved by the overlapping of the first sealing end 212 of one sub-blade and the second sealing end 213 of another sub-blade. If the first sealing end 212 is an edge with elastic material, the elastic material will be extruded and deformed when overlapping, filling the small gap between the two sub-blades and forming a sealing effect. If the first sealing end 212 is a boss and the second sealing end 213 is a groove, the boss will be embedded in the groove, and the inner wall of the groove will closely fit the outer wall of the boss, thereby effectively preventing air flow.

[0073] Through the overlapping of the first sealing end and the second sealing end, a sealing structure can be formed when the blade assembly is closed. This ensures that air leakage is maximally prevented when ventilation is not required, such as when the range hood is not turned on.

[0074] Reference Figures 1-16 In some embodiments, the fixed assembly of the range hood air volume adjusting valve further includes a mounting shell 13, which is hollow inside, i.e., has a through space inside, which constitutes an air exhaust passage of the mounting shell 13. The mounting frame 11 is arranged at the entrance 131 of the air exhaust passage. The mounting frame 11 is tightly connected with the mounting shell 13 by a specific mounting method, which includes welding, bolt connection or buckle connection, etc.

[0075] In this embodiment, the outlet of the mounting shell is generally connected with an external air exhaust pipeline. The mounting shell can be designed specifically according to the size, shape and connection method of different types of air exhaust pipelines. The outlet part can be flexibly adjusted. Whether it is a circular, rectangular air exhaust pipeline, or a pipeline with different connection forms such as flange connection, plug-in connection, etc., the mounting shell can be connected through customized design to ensure efficient adaptation to various air exhaust pipelines, thereby expanding the application range of the range hood air volume adjusting valve in different range hoods and air exhaust systems.

[0076] In some embodiments, the outlet 132 of the air exhaust passage is arranged on the other face of the mounting shell 13. The other face is any face except the face where the entrance 131 of the air exhaust passage is located. For example, the mounting shell 13 is a hexahedron, and the face where the entrance 131 of the air exhaust passage is located is defined as the other face. The outlet can be reserved on the other face (one face or multiple faces) of the mounting shell 13 as needed. If multiple other faces reserve outlets, a sealable interface can also be designed at the reserved outlet. For example, an interface with internal threads is used, and a corresponding sealing bolt or sealing cover is designed. Thus, in use, the required face is used as the outlet 132 of the air exhaust passage, and the unnecessary outlet is tightened with the sealing bolt or sealing cover to achieve sealing.

[0077] In this embodiment, the outlet of the air exhaust channel is arranged on any one of the other faces of the mounting shell except the face where the inlet is located. This means that the mounting shell has high flexibility in design, and the position of the outlet is not fixed, but can be selected according to the actual installation scene, such as the side face, top face or rear face of the mounting shell. For example, when the exhaust duct of the kitchen is located on the side of the range hood, the outlet of the air exhaust channel can be arranged on the side of the mounting shell, which greatly improves the adaptability of the range hood air volume regulating valve in different kitchen environments. In some kitchen space layouts, the position of the exhaust duct may be limited by various factors such as building structure, duct layout, etc., and cannot be directly installed on the position opposite to the inlet of the range hood air volume regulating valve. Through this flexible outlet arrangement, the exhaust duct can be conveniently connected with the mounting shell regardless of its position on the top, side or rear of the kitchen, without the need for large-scale modification of the original structure or duct layout of the kitchen, reducing the installation difficulty and cost.

[0078] In some embodiments, the mounting shell 13 includes a U-shaped surrounding plate 133, a first cover plate 134 and a second cover plate 135. The U-shaped surrounding plate 133 includes a first side plate A, a second side plate B and a bottom plate C, and has a U-shaped shape. The first side plate A and the second side plate B are parallel to each other and perpendicular to the bottom plate C. An installation frame 11 is arranged at the top opening of the U-shaped surrounding plate 133 (opposite to the bottom plate C), and the position of the installation frame 11 is the inlet 131 of the air exhaust channel of the mounting shell 13. At the same time, the U-shaped surrounding plate 133 is provided with two U-shaped keels 136, which are respectively located on the first side plate A and the second side plate B and are attached to the frame 112 and the frame 114. The U-shaped keels are provided with two clamping grooves 1361, and the first side plate A and the second side plate B are respectively provided with inwardly bent first edges 1331 on the two side edges.

[0079] The first cover plate 134 and the second cover plate 135 are respectively arranged at the two side openings of the U-shaped surrounding plate 133, and together with the U-shaped surrounding plate 133, the exhaust passage of the installation shell 13 is enclosed. The outlet 132 of the exhaust passage is arranged on the second cover plate 135, and the first cover plate 134 is arranged at the connection between the first side plate A and the second side plate B of the U-shaped surrounding plate 133, and both are provided with the inwardly bent second edge 1341. Similarly, the second cover plate 135 is arranged at the connection between the first side plate A and the second side plate B of the U-shaped surrounding plate, and also provided with the inwardly bent second edge 1341. The first edge 1331 and the second edge 1341 are clamped into the clamping groove 1361 of the U-shaped keel 136, and once clamped, due to the limiting effect of the clamping groove 1361 on the edge, the components are effectively constrained in the horizontal and vertical directions, and displacement is difficult to occur, thereby ensuring the stability of the structure of the installation shell 13. In addition, the second cover plate 135 is provided with a through hole 1352 corresponding to the position of the installation cabin 1133, and the through hole 1352 is sealed by the sealing plate 1132. The sealing plate 1132 is fixedly connected with the second cover plate 135 on one side, and is fixedly connected with the frame 113 of the installation frame 11 on the other side. In this way, the second cover plate 135 and the installation frame 11 are fixedly connected. Through such a structure, the installation shell 13 provides a stable installation basis for other components of the range hood air volume regulating valve.

[0080] The application also includes a range hood comprising the range hood air volume regulating valve according to any one of the preceding embodiments, which has the beneficial effects of the range hood air volume regulating valve according to any one of the preceding embodiments, and details thereof are not repeated herein. In the description of the present application, it should be understood that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0081] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0082] In the description of the specification, the description using the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the particular feature, structure, material or characteristic being described is included in at least one embodiment or example of the present application. The illustrative appearances of the above-mentioned terms in various places in the specification are not necessarily referred to the same embodiment or example. Moreover, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Furthermore, the terms "comprise", "comprising", "include", "including", "contain", "containing" or variations thereof are used inclusively and do not exclude the additional inclusion of unrecited features, structures, materials, or characteristics.

[0083] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be interpreted as limiting the present application, and ordinary skilled people in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A range hood air volume regulating valve, characterized by, The fixed assembly, the blade assembly, the linkage mechanism, the wind speed sensor, the driving mechanism and the controller are included. The fixed assembly includes a mounting frame, the mounting frame includes an air inlet, and a plurality of rotating shafts are arranged on the inner wall of the mounting frame. The blade assembly includes a plurality of parallel sub-blades, and both ends of each sub-blade are fixedly connected with a rotating shaft. The linkage mechanism is used to realize the synchronous rotation of the plurality of sub-blades. The wind speed sensor is arranged on the inner wall of the mounting frame and / or the sub-blade. The driving mechanism is used to drive the opening and closing of the blade assembly.

2. The range hood air volume regulating valve according to claim 1, wherein The wind speed sensor and the driving mechanism are electrically connected with the controller.

3. The range hood air volume regulating valve according to claim 2, wherein The linkage mechanism includes a linkage rod and a plurality of limiting blocks, one end of each limiting block is fixedly connected with a sub-blade, and the other end is rotatably connected with the linkage rod.

4. The range hood air volume regulating valve according to claim 1, wherein When the blade assembly is in a fully closed state or a fully open state, the limiting block reaches the maximum allowable angle relative to the linkage rod.

5. The range hood air volume regulating valve according to claim 4, wherein The limiting block is in a stepped shape, and includes a first kick surface, a first tread surface, a second kick surface and a second tread surface.

6. The range hood air volume regulating valve according to claim 5, wherein The first kick surface is rotatably connected with the linkage rod, and the second tread surface is fixedly connected with the sub-blade.

7. The range hood air volume regulating valve according to claim 1, wherein The inner wall of the mounting frame is further provided with a sealing plate, and the sealing plate and the rotating shaft are located on the perpendicular inner walls of the mounting frame.

8. The range hood air volume regulating valve according to claim 7, wherein When the blade assembly is in a fully closed state, the outer sub-blade of the sub-blades overlaps with the sealing plate.

9. The range hood air volume regulating valve according to claim 8, wherein The mounting frame is in a rectangular frame structure and is surrounded by four edge frames connected end to end.

10. A range hood characterized by The rotating shafts are arranged on the opposite two edge frames, and the sealing plates are arranged on the opposite two edge frames. The edge frame includes a mounting cabin, and the driving mechanism and the controller are located in the mounting cabin. The fixed assembly further includes an internally hollow mounting shell, the mounting shell includes an exhaust passage, and the mounting frame is arranged at the inlet of the exhaust passage. The mounting shell includes a U-shaped surrounding plate and two cover plates, the two cover plates are arranged at the two side openings of the U-shaped surrounding plate, the inlet of the exhaust passage is located at the top opening of the U-shaped surrounding plate, the outlet of the exhaust passage is arranged on the other face of the mounting shell, and the other face is any face except the face where the inlet of the exhaust passage is located. The U-shaped surrounding plate is provided with a U-shaped keel, the U-shaped keel is provided with two clamping grooves, the side plates of the U-shaped surrounding plate are provided with inwardly bent first edges, the connection between the cover plates and the side plates of the U-shaped surrounding plate is provided with inwardly bent second edges, the first edges and the second edges are located in the clamping grooves, and at least one of the two cover plates is fixed with the mounting frame. The range hood includes the range hood air volume regulating valve according to any one of claims 1-9.

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