Range hood

Abstract

The invention provides a range hood, and relates to the technical field of kitchen appliances. The range hood comprises a fan, a pre-swirl flow guide module and a controller. The pre-whirling flow guide module is used for conducting flow guide on smoke flowing to the draught fan in advance. The controller is used for controlling start-stop cooperation of the draught fan and the pre-whirl flow guide module in a linkage mode so as to control the noise intensity in the working process of the range hood. Therefore, the noise of the range hood is relatively low, and the smoke exhaust efficiency is relatively high.

Description

Technical Field

[0001] The present application relates to the technical field of kitchen appliances, and in particular to a range hood. Background Art

[0002] A range hood, also known as a cooker hood or exhaust hood, is a commonly used kitchen appliance that is often installed above a stove to absorb the smoke generated by the user when cooking and discharge it into the exhaust duct.

[0003] In the related art, a range hood includes a main chassis and a fan disposed in the main chassis, and the range hood absorbs smoke through the operation of the fan.

[0004] However, in the related art, the range hood has a relatively high noise level and a low smoke exhaust efficiency. Summary of the Invention

[0005] The present application aims to provide a range hood to solve the problems of high noise and low smoke exhaust efficiency of range hoods in the prior art.

[0006] The present invention provides a range hood comprising:

[0007] Fan;

[0008] Pre-swirl guide module, used to pre-direct the flue gas flowing to the fan;

[0009] The controller is used to control the start and stop coordination of the fan and the pre-swirl guide module to control the noise intensity during the operation of the range hood.

[0010] The range hood provided in the embodiments of the present application can control the noise intensity of the range hood within a preset range by coordinating the start and stop of the fan and the pre-swirl guide module, thereby facilitating noise control of the range hood. This allows the range hood to achieve high exhaust efficiency while maintaining a low noise level.

[0011] In one possible implementation, the controller is configured to:

[0012] After the fan is turned on, the noise intensity of the range hood is obtained, and based on the noise intensity, an action instruction is issued to determine whether to adjust the noise;

[0013] When the action instruction for adjusting the noise is issued, the controller controls the pre-swirl guide module to be turned on.

[0014] In this way, after the fan is turned on, it can be controlled accordingly according to the noise intensity of the range hood. When the noise of the range hood is loud, the pre-swirl guide module can be controlled to turn on, so as to reduce the noise level of the range hood while making the range hood have a higher smoke exhaust efficiency.

[0015] In a possible implementation, after the noise adjustment action instruction is issued, the controller controls the fan to reduce its rotation speed until the noise intensity of the range hood is within a preset range.

[0016] In this way, when the noise of the range hood is loud, the noise intensity of the range hood can be controlled within a preset range by controlling and reducing the speed of the fan, so as to meet the user's low noise needs.

[0017] In a possible implementation, the controller is further configured to:

[0018] The noise intensity of the noise adjustment action instruction is determined according to the rotation speed of the fan.

[0019] In this way, it is convenient to flexibly control the noise at the range hood according to the demand for smoke exhaust, so that the range hood can meet the smoke exhaust demand while making lower noise.

[0020] In a possible implementation, the controller is further configured to:

[0021] Whether to open the pre-swirl guide module is determined according to the speed of the fan.

[0022] In this way, it is convenient to flexibly control the switch of the pre-rotation guide module according to the speed of the fan, so that while meeting the noise reduction and smoke exhaust requirements of different working modes, the energy consumption of the range hood is lower and the range hood has higher energy efficiency.

[0023] In one possible implementation, the fan has a first fan inlet and a second fan inlet;

[0024] The range hood includes two pre-swirl guide modules, one of which is a first pre-swirl guide module and the other is a second pre-swirl guide module. The first pre-swirl guide module is used to pre-direct the flue gas flowing toward the first fan inlet, and the second pre-swirl guide module is used to pre-direct the flue gas flowing toward the second fan inlet.

[0025] The controller is also used to:

[0026] When the rotation speed of the fan is within a first preset rotation speed range, the first pre-rotation flow guide module and the second pre-rotation flow guide module are controlled to be turned on.

[0027] In this way, when the speed of the main unit is high, it is easy to meet the noise reduction and smoke exhaust requirements of the range hood, and the energy efficiency of the range hood is higher.

[0028] In one possible implementation, the air intake of the first fan inlet is greater than the air intake of the second fan inlet;

[0029] The controller is also used to:

[0030] When the speed of the fan is in a second preset speed range, the first pre-swirl guide module is controlled to be turned on and the second pre-swirl guide module is controlled to be turned off, wherein the second preset speed range is lower than the first preset speed range.

[0031] In this way, when the main unit rotates at a low speed, the noise reduction and smoke exhaust requirements of the range hood can be met while the energy consumption of the range hood is reduced, making the range hood have higher energy efficiency.

[0032] In a possible implementation, the controller is further configured to:

[0033] Determine the preset speed of the pre-swirl guide module according to the speed of the fan;

[0034] The controller controls the pre-swirl guide module to open at a preset speed.

[0035] In this way, it is convenient to flexibly control the speed of the pre-swirl guide module according to the speed of the fan, so that while meeting the noise reduction and smoke exhaust requirements of different working modes, the energy consumption of the range hood is lower and the range hood has higher energy efficiency.

[0036] In a possible implementation, the controller is further configured to:

[0037] When the speed of the fan is within a first preset speed range, determining the preset speed as a first speed;

[0038] When the speed of the fan is within a third preset speed range, determining the preset speed to be the second speed;

[0039] The third preset speed range is higher than the first preset speed range, and the second speed is higher than the first speed.

[0040] In this way, it is convenient to meet the noise reduction and smoke exhaust requirements of the range hood when the rotation speed of the main unit is different, and the range hood has lower energy consumption and higher energy efficiency.

[0041] In a possible implementation, the controller is further configured to:

[0042] When the rotation speed of the fan is within a second preset rotation speed range, the preset rotation speed is determined to be the first rotation speed, wherein the second preset rotation speed range is lower than the first preset rotation speed range.

[0043] In this way, the control logic of the controller is made simpler while meeting the noise reduction and smoke exhaust requirements of the range hood, which helps to reduce the difficulty of controlling the range hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0045] Figure 1 A schematic diagram of a range hood provided in an embodiment of the present application;

[0046] Figure 2 A schematic diagram of another range hood provided in an embodiment of the present application;

[0047] Figure 3 A perspective view of a flow guide member of a range hood provided in an embodiment of the present application;

[0048] Figure 4 A perspective view of a flow guide member of another range hood provided in an embodiment of the present application;

[0049] Figure 5 A schematic diagram of another range hood provided in an embodiment of the present application;

[0050] Figure 6 A perspective view of a range hood provided in an embodiment of the present application;

[0051] Figure 7 A perspective view of another range hood provided in an embodiment of the present application;

[0052] Figure 8 A schematic diagram of device connections of a range hood provided in an embodiment of the present application;

[0053] Figure 9 A flow chart of a noise reduction method for a range hood provided in an embodiment of the present application.

[0054] Description of reference numerals:

[0055] 100, main chassis; 110, oil fume inlet;

[0056] 200. Fume hood;

[0057] 300, fan; 310, fan inlet; 310a, first fan inlet; 310b, second fan inlet; 320, fan outlet; 330, fan impeller; 340, volute;

[0058] 400, flow guide; 400a, first flow guide; 400b, second flow guide; 410, smoke hood; 410a, first smoke hood; 410b, second smoke hood; 411, smoke inlet; 412, smoke outlet; 420, flow guide pipe; 420a, first flow guide pipe; 420b, second flow guide pipe; 421, straight pipe section; 422, elbow section;

[0059] 500, pre-rotation fan; 500a, first pre-rotation fan; 500b, second pre-rotation fan; 510, pre-rotation impeller; 520, driving device; 530, fixing bracket; 540, transmission rod;

[0060] 600, smoke exhaust seat;

[0061] 700, top plate;

[0062] 810. Controller; 820. Noise detection device. DETAILED DESCRIPTION

[0063] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0064] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0065] In this application, unless otherwise specified or limited, the terms "mounted," "connected," and "fixed" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integration; direct connections, indirect connections through an intermediate medium, or internal connections between two components or interactions between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0066] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0067] In the above description, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0068] In the range hoods of the related art, after the smoke enters the main case through the oil smoke inlet of the main case, it will be blocked by the volute of the fan, the top plate above the main case and other structures, causing backflow, which will cause the smoke flow in the main case to be more turbulent, easily causing the smoke to separate, and thus easily generating separation noise. In addition, the turbulent smoke flow in the main case will affect the air intake efficiency of the fan, making the air intake efficiency of the fan lower, and making the smoke exhaust efficiency of the range hood lower. In addition, after the turbulent smoke flows into the fan, it is easy to increase the noise generated by the rotation of the fan impeller of the fan, resulting in a higher noise level of the fan. In addition, when the smoke in the main case enters the fan, the angle will suddenly change, causing a sudden impact on the fan impeller of the fan, resulting in an increase in turbulent loss, making the boundary layer separation phenomenon significant, and easily generating high-frequency aerodynamic noise. Furthermore, the flue gas flow at the fan inlet is poor, which can lead to insufficient expansion pressure in the fan's volute, preventing the kinetic energy of the airflow from being converted into potential energy. This results in poor fan performance and low smoke exhaust efficiency for the range hood. Furthermore, the turbulent flow of flue gas generates significant energy loss during its flow. Consequently, range hoods in the related art suffer from high noise levels and low smoke exhaust efficiency.

[0069] Figure 1 This is a schematic diagram of a range hood provided by an embodiment of the present application. In the figure, the x direction is the depth direction of the range hood, the y direction is the width direction of the range hood, and the z direction is the height direction of the range hood.

[0070] like Figure 1 As shown, based on this, an embodiment of the present application provides a range hood, which includes a main case 100, a fan 300 and a smoke hood 200. The main case 100 is fixedly connected to the smoke hood 200. The main case 100 has a fume inlet 110. The inner cavity of the main case 100 is connected with the inner cavity of the smoke hood 200 through the fume inlet 110. The smoke hood 200 has a smoke outlet, which is connected with the fume inlet 110 through the inner cavity of the smoke hood 200. The fan 300 is arranged in the main case 100. Through the operation of the fan 300, the smoke can be sucked into the range hood from the smoke outlet and discharged to the smoke exhaust duct through the range hood.

[0071] For example, the fan 300 may be a centrifugal fan.

[0072] Exemplarily, the fan 300 has a fan inlet 310 and a fan outlet 320 (e.g., Figure 6 As shown in FIG), when the fan 300 is running, the fan inlet 310 is used to suck the smoke in the main box 100 into the fan 300, and the smoke is discharged to the smoke exhaust duct through the fan outlet 320 under the drive of the fan 300.

[0073] Exemplarily, the fan 300 includes a volute 340 and a fan impeller 330 (e.g., Figure 6 As shown in the figure, the volute 340 has a fan inlet 310 and a fan outlet 320, and the fan impeller 330 is arranged in the volute 340. The rotating fan impeller 330 is used to suck the smoke at the fan inlet 310 into the volute 340 and drive the smoke in the volute 340 to be discharged from the fan outlet 320.

[0074] like Figure 1 As shown, in some examples, the fume hood 200 is located below the main case 100, the lower end of the main case 100 is fixedly connected to the fume hood 200, the fume inlet 110 is located at the lower end of the main case 100, and the fan 300 is vertically arranged in the main case 100, the fan outlet 320 faces upward, and the fan inlet 310 faces horizontally. For example, the fan inlet 310 can face the width direction of the range hood.

[0075] Of course, in other examples, the relative position of the fume hood 200 and the main chassis 100 can also be adjusted. In this case, the position of the fume inlet 110 can be adjusted accordingly.

[0076] The following description will be made by taking as an example the case where the fume hood 200 is located below the main box 100 , the fume inlet 110 is located at the lower end of the main box 100 , and the fan 300 is arranged vertically.

[0077] like Figure 1As shown, in some examples, a smoke exhaust seat 600 is further provided in the main chassis 100 , and the smoke exhaust seat 600 is provided above the fan 300 , and the fan outlet 320 is connected to the smoke exhaust seat 600 , and the fan outlet 320 is connected to the smoke exhaust pipe through the smoke exhaust seat 600 .

[0078] In some examples, a top plate 700 is further provided in the main case 100, and the top plate 700 is provided above the fan 300. The top plate 700 is fixedly connected to the main case 100, and the smoke exhaust seat 600 is fixedly connected to the top plate 700 above the top plate 700. The fan outlet 320 is fixedly connected to the top plate 700 below the top plate 700. The top plate 700 has a connecting port that connects the fan outlet 320 with the smoke exhaust seat 600. The fan outlet 320 is connected to the smoke exhaust seat 600 through the top plate 700 and is connected to the smoke exhaust seat 600 through the connecting port. The top plate 700 can be used to support the smoke exhaust seat 600, and the top plate 700 can also be used to prevent the smoke in the main case 100 from continuing to flow upward.

[0079] In some examples, the fan 300 has two fan inlets 310, which are located on opposite side walls of the fan 300. For example, the two fan inlets 310 can be located on two side walls of the fan 300 in the width direction of the range hood. In this case, the fan 300 can have a larger air intake volume, thereby improving the smoke exhaust efficiency of the range hood.

[0080] Figure 2 A schematic diagram of another range hood provided in an embodiment of the present application.

[0081] like Figure 2 As shown, in the embodiment of the present application, the range hood further includes a pre-swirl guide module, which is disposed in the main housing 100 and is used to pre-direct the smoke flowing toward the fan 300. Specifically, the pre-swirl guide module is used to pre-direct the smoke flowing toward the fan inlet 310.

[0082] The pre-swirl guide module includes a guide member 400, which is disposed within the main housing 100. One end of the guide member 400 is connected to the fan 300, specifically, one end of the guide member 400 is connected to the fan inlet 310. The guide member 400 is used to guide the smoke flowing into the main housing 100 to the fan inlet 310.

[0083] In this way, after the flue gas enters the main chassis 100, it is directed toward the fan inlet 310 via the flow guide 400. At this point, the flue gas flowing from the oil fume inlet 110 to the fan inlet 310 is relatively stable, less susceptible to flow disturbances or separation caused by obstructions by the volute 340 and top plate 700 of the fan 300, and less prone to separation noise. Furthermore, the stable flow of flue gas also helps improve the air intake efficiency of the fan 300. Furthermore, the relatively stable flow of flue gas entering the fan 300 helps reduce the noise generated by the rotation of the fan impeller 330 of the fan 300. Furthermore, the flow guide 400 gradually changes the direction of the flue gas flow, thereby reducing the angular change of the flue gas upon entering the fan 300 and the sudden impact on the fan impeller 330 of the fan 300. This helps reduce turbulent losses and weakens boundary layer separation, thus reducing the generation of high-frequency aerodynamic noise. Furthermore, the flue gas flows more stably from the oil fume inlet 110 to the fan inlet 310, reducing energy loss caused by airflow turbulence and vortex shedding during the flow process. This results in less energy loss for the flue gas entering the fan 300. This reduces noise and improves the energy efficiency of the range hood.

[0084] Figure 3 A perspective view of a flow guide member of a range hood provided in an embodiment of the present application.

[0085] like Figure 3 As shown, a pre-swirl fan 500 is provided in the guide member 400. That is, the pre-swirl guide module further includes the pre-swirl fan 500 provided in the guide member 400. The pre-swirl fan 500 is used to pre-rectify the flue gas flowing into the guide member 400 and to drive the flue gas in the guide member 400 to flow toward the fan inlet 310.

[0086] In this way, the driving of the pre-swirl fan 500 can increase the pressure of the flue gas entering the fan 300, compensating for the inability of the airflow within the volute 340 to convert kinetic energy into potential energy due to insufficient expansion pressure in the volute 340 of the fan 300. This can improve the performance of the fan 300 and enhance smoke exhaust efficiency. Furthermore, the driving of the pre-swirl fan 500 can cause the flue gas flowing toward the fan inlet 310 to rotate, thereby obtaining a certain airflow angle. At this time, the flue gas flowing into the fan inlet 310 has a certain rotation angle, which can improve the flow pattern of the flue gas at the fan inlet 310, reduce the noise generated by the rotation of the fan impeller 330, and improve smoke exhaust efficiency. Furthermore, the driving of the pre-swirl fan 500 can also reduce the vortex area within the guide member 400, resulting in a more stable flow of the flue gas within the guide member 400 and less energy loss during the flow of the flue gas.

[0087] like Figure 2 、 Figure 3As shown, in some possible embodiments, the flow guide 400 includes a smoke collecting hood 410 and a flow guide duct 420, both of which are disposed within the main chassis 100. The smoke collecting hood 410 has a smoke inlet 411 and a smoke outlet 412. The smoke inlet 411 is connected to the oil fume inlet 110, and the smoke outlet 412 is connected to one end of the flow guide duct 420. The other end of the flow guide duct 420 is connected to the fan inlet 310, and the smoke outlet 412 is connected to the fan inlet 310 via the flow guide duct 420. The smoke collecting hood 410 is used to gather smoke from the smoke inlet 411 and guide it to the smoke outlet 412. The flow guide duct 420 is used to guide smoke from the smoke outlet 412 to the fan inlet 310.

[0088] In this way, the smoke collection hood 410 can help improve the air intake efficiency of the fan 300, thereby improving the smoke exhaust efficiency of the range hood. In addition, the smoke collection hood 410 is connected to the fan inlet 310 via the guide tube 420, which can stably guide the smoke to the fan inlet 310. The guide tube 420 can also gradually change the flow direction of the smoke, which can help reduce the angle change of the smoke when entering the fan 300.

[0089] In some examples, the pre-rotation fan 500 is disposed in the guide duct 420, and the pre-rotation fan 500 is used to drive the smoke to flow from the smoke outlet 412 to the fan inlet 310, so that the pre-rotation fan 500 is easier to arrange and the pre-rotation fan 500 is less likely to affect the smoke collection of the smoke hood 410.

[0090] In some possible embodiments, the smoke hood 410 is located at the oil fume inlet 110, the smoke inlet 411 is located at the end of the smoke hood 410 close to the oil fume inlet 110, the smoke outlet 412 is located at the end of the smoke hood 410 away from the oil fume inlet 110, and the fan 300 and the guide pipe 420 are both located on the side of the smoke hood 410 away from the oil fume inlet 110.

[0091] In this way, the smoke can be efficiently gathered and directed to the fan inlet 310, and the smoke exhaust efficiency of the range hood is higher.

[0092] Illustratively, the air guide duct 420 and the fan 300 are located above the smoke hood 410 , the smoke inlet 411 is located at the lower end of the smoke hood 410 , and the smoke outlet 412 is located at the upper end of the smoke hood 410 .

[0093] Illustratively, the air guide duct 420 is located on the side of the fan 300 in the width direction of the range hood.

[0094] In some possible implementations, the size of the smoke inlet 411 is larger than the size of the smoke outlet 412 , and the inner wall of the smoke collecting hood 410 gradually converges from the smoke inlet 411 to the smoke outlet 412 .

[0095] In this way, the smoke in the smoke hood 410 is better gathered and guided, and the smoke is less likely to have backflow, flow disorder, flow separation and the like in the smoke hood 410, which is conducive to making the smoke flowing into the smoke hood 410 flow more stably toward the smoke outlet 412.

[0096] For example, the inner wall of the smoke collecting hood 410 is a sloped structure, that is, the inner walls on each side of the smoke collecting hood 410 are all sloped structures, so as to facilitate guiding the smoke in the smoke collecting hood 410 to the smoke outlet 412. For example, the smoke collecting hood 410 can be a trumpet-shaped structure.

[0097] Illustratively, the vertical projection of the smoke outlet 412 is located within the vertical projection of the smoke inlet 411 , and the edge of the vertical projection of the smoke outlet 412 is spaced apart from the edge of the vertical projection of the smoke inlet 411 .

[0098] In some possible embodiments, the guide pipe 420 includes a straight pipe section 421 and an elbow section 422 , one end of the straight pipe section 421 is connected to the smoke outlet 412 , the other end of the straight pipe section 421 is connected to one end of the elbow section 422 , and the other end of the elbow section 422 is connected to the fan inlet 310 .

[0099] In this way, the flue gas entering the draft tube 420 first enters the straight pipe section 421. The flow resistance of the flue gas within the straight pipe section 421 is low, making eddy currents less likely to form. This reduces energy loss during the flue gas flow and ensures more stable flue gas flow. Furthermore, the straight pipe section 421 is connected to the fan inlet 310 via the elbow section 422. This elbow section 422 can be used to gradually redirect the flue gas flow, allowing the flue gas to flow toward the fan inlet 310 at a preferred angle. This reduces the angular change of the flue gas upon entering the fan 300, facilitating noise reduction and improving the air intake efficiency of the fan 300.

[0100] Illustratively, the straight pipe section 421 is vertically arranged, the lower end of the straight pipe section 421 is connected to the smoke outlet 412 , and the upper end of the straight pipe section 421 is connected to one end of the elbow section 422 .

[0101] like Figure 3 As shown, in some possible implementations, the pre-rotation fan 500 is disposed in the straight pipe section 421 .

[0102] In this way, the arrangement of the pre-rotation fan 500 is relatively easy. In addition, the pre-rotation fan 500 blows air toward the elbow section 422, which is also beneficial to reducing the vortex area generated by the elbow section 422, and is beneficial to the stable flow of smoke in the guide pipe 420.

[0103] In some possible implementations, the flow guide tube 420 is a circular tube. That is, the cross section of the flow guide tube 420 is circular, and the cross section of the flow guide tube 420 refers to a cross section perpendicular to the extension direction of the flow guide tube 420 .

[0104] Thus, the smoke encounters less resistance in the flow of the flow guide 420, which facilitates stable smoke flow with low energy loss. Furthermore, the flow guide 420 has less influence on the rotation of the smoke driven by the pre-rotation fan 500, which helps improve the flow pattern of the smoke at the fan inlet 310.

[0105] Exemplarily, the pre-rotation fan 500 includes a pre-rotation impeller 510, a driving device 520 and a fixed bracket 530. The driving device 520 is fixedly connected to the straight pipe section 421 through the fixed bracket 530. The pre-rotation impeller 510 is transmission-connected to the output end of the driving device 520. The driving device 520 is used to drive the pre-rotation impeller 510 to rotate. The rotating pre-rotation impeller 510 is used to drive the flue gas to flow from the smoke outlet 412 to the fan inlet 310.

[0106] Exemplarily, the pre-rotation impeller 510 may have 4 to 8 blades. For example, the pre-rotation impeller 510 may have 4 blades, so that the pre-rotation impeller 510 can have a larger air suction volume.

[0107] Exemplarily, the driving device 520 may be a motor.

[0108] In some possible implementations, the pre-rotation fan 500 is fixedly connected to one end of the straight pipe section 421 connected to the smoke hood 410 via a fixing bracket 530 , so that the pre-rotation fan 500 is easier to assemble.

[0109] Illustratively, the driving device 520 is fixedly connected to one end of the straight pipe section 421 connected to the smoke hood 410 through the fixing space 530 .

[0110] In some examples, the pre-rotation fan 500 also includes a transmission rod 540, and the output end of the driving device 520 is connected to the pre-rotation impeller 510 through the transmission rod 540. The relative position of the driving device 520 and the pre-rotation impeller 510 is relatively flexible, which facilitates the flexible arrangement of the driving device 520 and the pre-rotation impeller 510.

[0111] Figure 4 A perspective view of a flow guide member of another range hood provided in an embodiment of the present application.

[0112] In some possible implementations, the pre-rotation impeller 510 is disposed at one end of the straight pipe section 421 connected to the elbow section 422 of the guide pipe 420 .

[0113] Thus, the pre-swirl impeller 510 is closer to the elbow section 422, which is conducive to improving the vortex at the elbow section 422 through the driving of the pre-swirl impeller 510. In addition, the pre-swirl impeller 510 is closer to the fan inlet 310, which is conducive to improving the flow state of the flue gas at the fan inlet 310.

[0114] Figure 5 This is a schematic diagram of another range hood provided in an embodiment of the present application. Figure 6 A perspective view of a range hood provided in an embodiment of the present application.

[0115] like Figure 5 、 Figure 6 As shown, in some examples where the fan 300 has two fan inlets 310 , the range hood includes two pre-swirl guide modules corresponding one to one with the fan inlets 310 , and the pre-swirl guide modules are used to pre-guide the smoke flowing toward the corresponding fan inlets 310 .

[0116] Specifically, one end of the guide member 400 of the pre-swirl guide module is connected to the corresponding fan inlet 310. The guide member 400 of the pre-swirl guide module is used to guide the smoke flowing into the main chassis 100 to the corresponding fan inlet 310. The guide members 400 of both pre-swirl guide modules are each equipped with a pre-swirl fan 500. The pre-swirl fan 500 is used to pre-rectify the smoke flowing into the guide member 400. The pre-swirl fan 500 drives the smoke in the guide member 400 to flow toward the corresponding fan inlet 310.

[0117] In this way, while the fan 300 has a large air intake volume, the range hood can have lower noise, higher smoke exhaust efficiency, and higher energy efficiency.

[0118] For example, the two fan inlets 310 are respectively a first fan inlet 310a and a second fan inlet 310b, and the two pre-swirl guide modules are respectively a first pre-swirl guide module and a second pre-swirl guide module. The first pre-swirl guide module is used to pre-direct the flue gas flowing toward the first fan inlet 310a, and the second pre-swirl guide module is used to pre-direct the flue gas flowing toward the second fan inlet 310b.

[0119] The guide member 400 of the first pre-swirl guide module is a first guide member 400a, and the guide member 400 of the second pre-swirl guide module is a second guide member 400b. One end of the first guide member 400a corresponds to the first fan inlet 310a, and one end of the second guide member 400b corresponds to the second fan inlet 310b. The pre-swirl fan 500 disposed within the first guide member 400a is a first pre-swirl fan 500a, and the pre-swirl fan 500 disposed within the second guide member 400b is a second pre-swirl fan 500b. The first air guide 400a is connected to the first fan inlet 310a and is used to guide the oil smoke flowing into the main chassis 100 to the first fan inlet 310a. The first pre-rotation fan 500a is used to pre-rectify the smoke flowing into the first air guide 400a and drive the smoke in the first air guide 400a to flow toward the first fan inlet 310a. The second air guide 400b is connected to the second fan inlet 310b and is used to guide the smoke flowing into the main chassis 100 to the second fan inlet 310b. The second pre-rotation fan 500b pre-rectifies the smoke flowing into the second air guide 400b and drives the smoke in the second air guide 400b to flow toward the second fan inlet 310b.

[0120] Exemplarily, the fan inlet 310 is connected to the smoke outlet 412 of the corresponding smoke collecting hood 410 of the corresponding air guide 400 through the air guide pipe 420 of the corresponding air guide 400. Specifically, the smoke collecting hood 410 of the first air guide 400a is the first smoke collecting hood 410a, and the air guide pipe 420 of the first air guide 400a is the first air guide pipe 420a. The smoke collecting hood 410 of the second air guide 400b is the second smoke collecting hood 410b, and the air guide pipe 420 of the second air guide 400b is the second air guide pipe 420b. One end of the first air guide pipe 420a is connected to the smoke outlet 412 of the first smoke collecting hood 410a, and the other end of the first air guide pipe 420a is connected to the first fan inlet 310a. The smoke outlet 412 of the first smoke collecting hood 410a is connected to the first fan inlet 310a through the first air guide pipe 420a. One end of the second guide pipe 420b is connected to the smoke outlet 412 of the second smoke hood 410b, and the other end of the second guide pipe 420b is connected to the second fan inlet 310b. The smoke outlet 412 of the second smoke hood 410b is connected to the second fan inlet 310b through the second guide pipe 420b.

[0121] For example, the smoke hoods 410 of the two air guide members 400 are arranged side by side at the oil fume inlet 110 along the arrangement direction of the two fan inlets 310, that is, the first smoke hood 410a and the second smoke hood 410b are arranged side by side at the oil fume inlet 110 along the arrangement direction of the first fan inlet 310a and the second fan inlet 310b, so as to facilitate the oil fume flowing into the main chassis 100 from the oil fume inlet 110 to flow into the smoke hoods 410 of the two air guide members 400, thereby helping to improve the smoke exhaust efficiency of the range hood.

[0122] Exemplarily, the smoke collecting hoods 410 of the two air guides 400 are arranged side by side along the width direction of the range hood. In other words, the first smoke collecting hood 410a and the second smoke collecting hood 410b are arranged side by side along the width direction of the range hood.

[0123] Exemplarily, the guide pipes 420 of the two guide members 400 are respectively located on the side facing the corresponding fan inlet 310, that is, the first guide pipe 420a is located on the side facing the first fan inlet 310a, and the second guide pipe 420b is located on the side facing the second fan inlet 310b.

[0124] Figure 7 A perspective view of another range hood provided in an embodiment of the present application.

[0125] like Figure 7 As shown, for example, the pre-rotation impeller 510 of the first pre-rotation fan 500a is disposed at one end of the straight section 421 of the first air guide 420a connected to the elbow section 422 of the first air guide 420a, and the driving device 520 of the first pre-rotation fan 500a is fixedly connected to one end of the straight section 421 of the first air guide 420a connected to the first smoke hood 410a via the fixing bracket 530 of the first pre-rotation fan 500a. The pre-rotation impeller 510 of the second pre-rotation fan 500b is disposed at one end of the straight section 421 of the second air guide 420b connected to the elbow section 422 of the second air guide 420b, and the driving device 520 of the second pre-rotation fan 500b is fixedly connected to one end of the straight section 421 of the second air guide 420b connected to the second smoke hood 410b via the fixing bracket 530 of the second pre-rotation fan 500b.

[0126] Due to reasons such as the motor arrangement of the fan 300, when the fan 300 is running, the air intake volume of the first fan inlet 310a is different from the air intake volume of the second fan inlet 310b. This application uses the example that the air intake volume of the first fan inlet 310a is greater than the air intake volume of the second fan inlet 310b to illustrate.

[0127] Figure 8 A schematic diagram of component connections of a range hood provided in an embodiment of the present application.

[0128] like Figure 8As shown, in some possible embodiments, the range hood further includes a controller 810, which exchanges signals with the fan 300 and the pre-swirl guide module. Specifically, the controller 810 exchanges signals with the pre-swirl fan 500 of the pre-swirl guide module. The controller 810 is used to control the start and stop coordination of the fan 300 and the pre-swirl guide module to control the noise intensity during operation of the range hood.

[0129] In this way, by coordinating the start and stop of the fan 300 and the pre-swirl guide module, the noise intensity of the range hood can be controlled within a preset range, thereby facilitating noise control of the range hood. This allows the range hood to have a low noise level while achieving high exhaust efficiency.

[0130] Illustratively, the controller 810 is used to control the start and stop coordination of the fan 300 and the pre-rotation fan 500 in a coordinated manner to control the noise intensity during the operation of the range hood.

[0131] Figure 9 A flow chart of a noise reduction method for a range hood provided in an embodiment of the present application.

[0132] like Figure 9 As shown, in some possible implementations, the controller 810 is configured to: after controlling the fan 300 to turn on, obtain the noise intensity of the range hood, and issue an action instruction on whether to adjust the noise based on the noise intensity. When the action instruction on adjusting the noise is issued, the controller 810 controls the activation of the pre-swirl guide module.

[0133] In this way, after the fan 300 is turned on, it can be controlled accordingly according to the noise intensity of the range hood. When the range hood noise is high, the pre-swirl guide module can be controlled to turn on, so as to reduce the noise level of the range hood while achieving higher smoke exhaust efficiency.

[0134] like Figure 8 As shown, the range hood further includes a noise detection device 820, which exchanges signals with the controller 810. The noise detection device 820 is used to detect the noise intensity of the range hood, and the controller 810 is used to obtain the noise intensity of the range hood detected by the noise detection device 820. In this way, the noise intensity of the range hood is more convenient to obtain.

[0135] Illustratively, the noise detection device 820 may be disposed in the smoke hood 200 .

[0136] In some possible implementations, after the noise adjustment action instruction is issued, the controller 810 controls the speed of the fan 300 to be reduced until the noise intensity of the range hood is within a preset range.

[0137] In this way, when the noise of the range hood is relatively loud, the noise intensity of the range hood can be controlled within a preset range by reducing the rotation speed of the fan 300, so as to meet the user's low noise requirements.

[0138] In some possible implementations, the controller 810 is configured to issue an action instruction for adjusting the noise when the noise intensity of the range hood is higher than a preset range, so as to enable the range hood to achieve automatic noise reduction control.

[0139] In some possible implementations, the controller 810 is further configured to determine the noise intensity of the noise adjustment action instruction according to the rotation speed of the fan 300 .

[0140] In this way, it is convenient to flexibly control the noise at the range hood according to the demand for smoke exhaust, so that the range hood can meet the smoke exhaust demand while making lower noise.

[0141] Exemplarily, the controller is further configured to determine a preset range of noise intensity of the range hood according to the rotation speed of the fan 300 .

[0142] Exemplarily, the controller 810 is further configured to obtain the rotational speed of the fan 300 so as to perform corresponding control according to the rotational speed of the fan 300 .

[0143] Exemplarily, the range hood has a low-speed operating mode, a medium-speed operating mode, and a high-speed operating mode. When the range hood is in the low-speed operating mode, the speed of the fan 300 is within a second preset speed range. When the range hood is in the medium-speed operating mode, the speed of the fan 300 is within a first preset speed range. When the range hood is in the high-speed operating mode, the speed of the fan 300 is within a third preset speed range. The second preset speed range is lower than the first preset speed range, and the third preset speed range is higher than the first preset speed range.

[0144] When the speed of the fan 300 is within the second preset speed range, that is, when the range hood is in the low-speed operating mode, the corresponding preset range of the noise intensity of the range hood is the first noise range, which can be less than or equal to 45dB. When the speed of the fan 300 is within the first preset speed range, that is, when the range hood is in the medium-speed operating mode, the corresponding preset range of the noise intensity of the range hood is the second noise range, which can be greater than 45dB and less than or equal to 60dB. When the speed of the fan 300 is within the third preset speed range, the corresponding preset range of the noise intensity of the range hood is the third noise range, which can be greater than 60dB and less than or equal to 70dB.

[0145] In some possible implementations, the controller 810 is further configured to determine whether to start the pre-swirl guide module according to the rotation speed of the fan 300 .

[0146] In this way, it is convenient to flexibly control the switch of the pre-rotation guide module according to the rotation speed of the fan 300, so that while meeting the noise reduction and smoke exhaust requirements of different working modes, the energy consumption of the range hood is lower and the range hood has higher energy efficiency.

[0147] In some possible implementations, the controller 810 is further configured to control the first pre-swirl guide module to be turned on and the second pre-swirl guide module to be turned off when the rotation speed of the fan 300 is within a second preset rotation speed range.

[0148] In this way, the noise reduction and smoke exhaust requirements of the range hood in the weak working mode can be met while the energy consumption of the range hood is reduced and the range hood has higher energy efficiency.

[0149] In some possible implementations, the controller 810 is further configured to control the first pre-swirl guide module and the second pre-swirl guide module to be turned on when the rotation speed of the fan 300 is within a first preset rotation speed range.

[0150] In this way, it is easy to meet the noise reduction and smoke exhaust requirements when the range hood is in the mid-range working mode, and the energy efficiency of the range hood is higher.

[0151] In some possible implementations, the controller 810 is further configured to control the first pre-swirl guide module and the second pre-swirl guide module to be turned on when the rotation speed of the fan 300 is within a third preset rotation speed range.

[0152] In this way, it is easy to meet the noise reduction and smoke exhaust requirements when the range hood is in the strong working mode, and the energy efficiency of the range hood is higher.

[0153] In some possible implementations, the controller 810 is further configured to determine a preset rotation speed of the pre-swirl guide module according to the rotation speed of the fan 300. The controller 810 controls the pre-swirl guide module to start at the preset rotation speed.

[0154] In this way, it is convenient to flexibly control the speed of the pre-rotation guide module according to the speed of the fan 300, so that while meeting the noise reduction and smoke exhaust requirements of different working modes, the energy consumption of the range hood is lower and the range hood has higher energy efficiency.

[0155] In some possible implementations, the controller 810 is further configured to determine the preset speed as a first speed when the speed of the fan 300 is within a first preset speed range, and to determine the preset speed as a second speed when the speed of the fan 300 is within a third preset speed range, wherein the second speed is higher than the first speed.

[0156] In this way, it is easy to meet the noise reduction and smoke exhaust requirements when the range hood is in the medium and strong working modes. The energy consumption of the range hood is low when it is in the medium working mode, and the range hood has higher energy efficiency.

[0157] In some possible implementations, the controller 810 is further configured to determine the preset speed as the first speed when the speed of the fan 300 is within a second preset speed range.

[0158] In this way, while meeting the noise reduction and smoke exhaust requirements when the range hood is in the low-speed working mode, the control logic of the controller 810 is relatively simple, which helps to reduce the difficulty of controlling the range hood.

[0159] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A range hood, characterized in that: include: fan (300); a pre-swirl guide module, used for pre-guiding the flue gas flowing toward the fan (300); The controller (810) is used to control the start and stop coordination of the fan (300) and the pre-rotation guide module in a coordinated manner, so as to control the noise intensity during the operation of the range hood.

2. The range hood according to claim 1, characterized in that: The controller (810) is used to: After the fan (300) is controlled to be turned on, the noise intensity of the range hood is obtained, and according to the noise intensity, an action instruction is issued as to whether to adjust the noise; When the action instruction for adjusting the noise is issued, the controller (810) controls the start-up of the pre-swirl guide module.

3. The range hood according to claim 2, characterized in that: When the action instruction for adjusting the noise is issued, the controller (810) controls the reduction of the rotation speed of the fan (300) until the noise intensity of the range hood is within a preset range.

4. The range hood according to claim 2, characterized in that: The controller (810) is further configured to: The noise intensity of the noise adjustment action instruction is determined according to the rotation speed of the fan (300).

5. The range hood according to any one of claims 1 to 4, characterized in that: The controller (810) is further configured to: Whether to start the pre-rotation guide module is determined according to the rotation speed of the fan (300).

6. The range hood according to claim 5, characterized in that: The fan (300) has a first fan inlet (310a) and a second fan inlet (310b); The range hood comprises two pre-swirl flow guide modules, one of which is a first pre-swirl flow guide module, and the other is a second pre-swirl flow guide module, the first pre-swirl flow guide module being used to pre-direct the smoke flowing toward the first fan inlet (310a), and the second pre-swirl flow guide module being used to pre-direct the smoke flowing toward the second fan inlet (310b); The controller (810) is further configured to: When the rotation speed of the fan (300) is within a first preset rotation speed range, the first pre-rotation flow guide module and the second pre-rotation flow guide module are controlled to be turned on.

7. The range hood according to claim 6, characterized in that: The air intake volume of the first fan inlet (310a) is greater than the air intake volume of the second fan inlet (310b); The controller (810) is further configured to: When the rotation speed of the fan (300) is within a second preset rotation speed range, the first pre-rotation guide module is controlled to be turned on, and the second pre-rotation guide module is controlled to be turned off, wherein the second preset rotation speed range is lower than the first preset rotation speed range.

8. The range hood according to any one of claims 1 to 4, characterized in that: The controller (810) is further configured to: Determining a preset rotation speed of the pre-rotation guide module according to the rotation speed of the fan (300); The controller (810) controls the pre-swirl guide module to start at the preset rotation speed.

9. The range hood according to claim 8, characterized in that: The controller (810) is further configured to: When the rotation speed of the fan (300) is within a first preset rotation speed range, determining the preset rotation speed as a first rotation speed; When the rotation speed of the fan (300) is within a third preset rotation speed range, determining the preset rotation speed as a second rotation speed; The third preset speed range is higher than the first preset speed range, and the second speed is higher than the first speed.

10. The range hood according to claim 9, characterized in that: The controller (810) is further configured to: When the rotation speed of the fan (300) is within a second preset rotation speed range, the preset rotation speed is determined to be a first rotation speed, wherein the second preset rotation speed range is lower than the first preset rotation speed range.

Images