Range hood

Abstract

The present application discloses a range hood, the range hood comprising: a panel, a plurality of suction ports are arranged on the central area of ​​the panel; a flow guide device, the flow guide device is arranged in the panel, the flow guide device comprises a plurality of flow guide plates, each of the flow guide plates is arranged corresponding to one of the suction ports to separate the plurality of suction ports, and the surface of each flow guide plate facing the suction port is constructed as a curved surface. Thus, by arranging the flow guide plates corresponding to the suction ports, collision of airflows sucked in by the plurality of suction ports is avoided, so as to avoid vortexes during the operation of the range hood, thereby preliminarily reducing the working noise of the range hood, and then the surface of each flow guide plate facing the corresponding suction port is constructed as a curved surface, and the airflow flowing into the suction port is further guided by the curved surface, so as to improve the flow state of the airflow in the suction port area, and further achieve noise reduction, so that the working noise of the range hood of the present application is smaller, and the user experience is improved.

Description

Technical Field

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

[0002] In the related technology, a range hood is a kitchen appliance that extracts cooking fumes and water vapor generated during the cooking process and purifies the kitchen environment. It is installed above the stove and can quickly extract waste gas and cooking fumes and discharge them outdoors, reducing indoor pollution, purifying the air, and has anti-toxic and explosion-proof safety protection functions.

[0003] Range hoods have become an indispensable kitchen appliance in modern families. With the increase in user demand, range hoods need to reduce noise during operation, improve human comfort, and enhance user experience while meeting core indicators such as air volume and static pressure. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a range hood having lower working noise and higher user experience.

[0005] According to the embodiment of the present application, the range hood includes: a panel, a plurality of suction ports are arranged on the central area of ​​the panel; a guide device, the guide device is arranged in the panel, the guide device includes a plurality of guide plates, each of the guide plates is arranged corresponding to one of the suction ports to separate the plurality of suction ports, and the surface of each guide plate facing the suction port is constructed as a curved surface.

[0006] According to the range hood of the embodiment of the present application, a guide plate corresponding to the suction port is provided to separate the multiple suction ports, thereby avoiding collision of the airflows sucked in by the multiple suction ports and avoiding generation of vortices during the operation of the range hood, thereby preliminarily reducing the working noise of the range hood. Furthermore, the surface of each guide plate facing the corresponding suction port is constructed as an arc surface, and the airflow flowing into the suction port is further guided by the arc surface, thereby improving the airflow flow state in the suction port area, which can further achieve noise reduction, make the working noise of the range hood of the present application smaller, and improve the user experience.

[0007] According to some embodiments of the present application, the guide plate includes: a first guide plate and a second guide plate, the suction port includes: a first suction port and a second suction port, the first guide plate and the second guide plate are connected at one end on the same side, the first guide plate and the second guide plate are fixed on the panel at the other end on the same side, and the first guide plate is opposite to the first suction port, and the second guide plate is opposite to the second suction port.

[0008] In some embodiments, the first guide plate and the second guide plate are recessed toward each other to respectively define a first curved surface opposite to the first suction port and a second curved surface opposite to the second suction port.

[0009] In some embodiments, the first guide plate, the second guide plate and the panel define a noise reduction chamber, and the first guide plate and the second guide plate are further provided with connecting holes, and the noise reduction chamber is connected with the outside through the connecting holes.

[0010] Furthermore, the communicating holes on the first guide plate and the second guide plate are arranged in multiple rows and columns, and the porosity of the first guide plate and the porosity of the second guide plate are both between 6% and 7%.

[0011] Furthermore, the diameter of the connecting hole is 0.6 mm-0.8 mm.

[0012] Furthermore, the flow guide device further includes: a flow guide member, and the flow guide member is arranged in the noise reduction chamber.

[0013] In some embodiments, the guide member has a first labyrinth flow channel connected to the first guide plate and a second labyrinth flow channel connected to the second guide plate, the first labyrinth flow channel is used to reduce the noise of the airflow flowing in through the first suction port, and the second labyrinth flow channel is used to reduce the noise of the airflow flowing in through the second suction port.

[0014] Furthermore, the guide member includes: a first surround plate, a second surround plate and a support plate, the first surround plate and the second surround plate are both arranged around the support plate, and the surround portion of the first surround plate is spaced apart from the surround portion of the second surround plate to define a first labyrinth flow channel and a second labyrinth flow channel.

[0015] In some embodiments, one end of the first surround plate is disposed on one end of the panel adjacent to the first suction port, the other end of the first surround plate is connected to the support plate, one end of the second surround plate is connected to the same side end of the first guide plate and the second guide plate, and the other end of the second surround plate is connected to the support plate.

[0016] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1is a schematic diagram of a range hood according to an embodiment of the present application;

[0019] Figure 2 is a schematic diagram of the cooperation between the panel and the air guide device of the range hood according to an embodiment of the present application;

[0020] Figure 3 yes Figure 2 A magnified schematic diagram of the middle A area;

[0021] Figure 4 Schematic diagram of a flow guide device for a range hood according to an embodiment of the present application.

[0022] Reference numerals:

[0023] Range hood 100,

[0024] Panel 10, first suction port 11, second suction port 12,

[0025] The guide device 20, the first guide plate 21, the second guide plate 22, the guide member 23, the first surrounding plate 231, the second surrounding plate 232, the support plate 233,

[0026] Noise reduction chamber a, first labyrinth flow channel b, second labyrinth flow channel c. DETAILED DESCRIPTION

[0027] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0028] First of all, it should be noted that the range hood 100 is a kitchen and bathroom appliance widely used in daily life. It can absorb cooking fumes and combustion exhaust gas generated in the indoor space during the user's cooking process, and can accelerate indoor air circulation.

[0029] However, during the operation of the range hood 100, during the suction process of the fan (used to generate suction airflow) of the range hood 100, the airflows entering from the multiple suction ports on the panel 10 of the range hood 100 may collide. After the airflows collide, vortices will be generated, thereby aggravating the operating noise of the range hood 100. Based on this, the present application proposes a range hood 100, which improves the flow state of the airflow and avoids the generation of vortices by setting a guide device 20, so as to effectively reduce the operating noise of the range hood 100.

[0030] Reference below Figure 1-Figure 4 A range hood 100 according to an embodiment of the present application is described.

[0031] like Figures 1 to 4 As shown, the range hood 100 according to the embodiment of the present application includes: a panel 10 and a guide device 20.

[0032] Among them, a plurality of suction ports are arranged on the central area of ​​the panel 10, each of which is suitable for sucking cooking fumes, water vapor and combustion exhaust gas into the interior of the range hood 100 during operation; the guide device 20 is arranged in the panel 10, and the guide device 20 includes a plurality of guide plates, each of which is arranged corresponding to a suction port to separate the plurality of suction ports, and the surface of each guide plate facing the suction port is constructed as a curved surface.

[0033] Specifically, in Figure 1 In the specific embodiment shown, a suction space is defined between the shell of the range hood 100 and the panel 10, a fan is arranged in the shell and generates a suction airflow, two suction ports are arranged in the middle area of ​​the panel 10, and the two suction ports can suck the airflow into the suction space, and two guide plates of the guide device 20 are correspondingly arranged, and the guide plates and the suction ports are arranged one by one, so that the two suction ports are separated by the two guide plates to avoid direct collision of the airflows sucked in by the two suction ports, so as to avoid the generation of vortices in the suction space, thereby preliminarily reducing the noise during the operation of the range hood 100.

[0034] Furthermore, the surface of the guide plate opposite to the suction port is constructed as a curved surface, so that the guide plate has a better guiding effect, which can improve the airflow state in the suction port area and further achieve noise reduction.

[0035] According to the range hood 100 of the embodiment of the present application, guide plates corresponding to the suction ports are provided to separate the multiple suction ports, thereby avoiding collision of airflows sucked in by the multiple suction ports, avoiding generation of vortices during the operation of the range hood 100, and preliminarily reducing the operating noise of the range hood 100. Furthermore, the surface of each guide plate facing the corresponding suction port is constructed as an arc surface, and the airflow flowing into the suction port is further guided by the arc surface, thereby improving the airflow flow state in the suction port area, which can further achieve noise reduction, make the operating noise of the range hood 100 of the present application smaller, and improve the user experience.

[0036] It can be understood that the existing range hood 100 achieves a noise reduction effect by arranging a noise reduction device under the volute of the fan to improve the flow state near the air inlet end of the volute. However, it is easy to accumulate oil and difficult to clean after long-term use. The present application directly arranges a guide device 20 on the suction port area to effectively reduce noise, and the guide device 20 is easy to disassemble and easier to clean. At the same time, preferably, the noise reduction device on the volute can be used together with the guide device 20 of the present application, which has a better noise reduction effect and can more effectively reduce the noise of the range hood 100.

[0037] In other embodiments, in order to improve the suction effect of the range hood 100, an edge suction port may be provided between the panel 10 and the peripheral edge of the shell of the range hood 100, and a guide plate may be provided on the inner side of the edge suction port accordingly, so as to improve the flow state of the airflow sucked in by the edge suction port, thereby further reducing the working noise of the range hood 100.

[0038] like Figure 2 and Figure 3 As shown, according to some embodiments of the present application, the guide plate includes: a first guide plate 21 and a second guide plate 22, the suction port includes: a first suction port 11 and a second suction port 12, the first guide plate 21 and the second guide plate 22 are connected at one end on the same side, the other end on the same side of the first guide plate 21 and the second guide plate 22 are fixed on the panel 10, and the first guide plate 21 is opposite to the first suction port 11, and the second guide plate 22 is opposite to the second suction port 12.

[0039] Specifically, the panel 10 is generally M-shaped, and the panel 10 includes: a first side panel and a second side panel located at both ends of the panel 10 in the length direction, and a middle panel located in the middle area, the first side panel and the middle panel are connected by a first connecting plate located therebetween, the second side panel and the middle panel are connected by a second connecting plate located therebetween, the first suction port 11 is formed on the first connecting plate, and the second suction port 12 is formed on the second connecting plate.

[0040] Among them, the first connecting plate, the second connecting plate and the middle plate define an accommodating space, that is, the middle area of ​​the panel 10 is recessed downward to form an accommodating space, and the guide device 20 is arranged in the accommodating space, one side of the guide device 20 is opposite to the middle plate, and the other two sides of the guide device 20 are provided with a first guide plate 21 and a second guide plate 22, and the other two sides of the guide device 20 correspond to the first suction port 11 and the second suction port 12 respectively.

[0041] Furthermore, the first guide plate 21 is opposite to the first suction port 11, and the second guide plate 22 is opposite to the second suction port 12, so as to separate the first suction port 11 from the second suction port 12, avoid direct collision between the airflow inhaled by the first suction port 11 and the airflow inhaled by the second suction port 12, and effectively reduce working noise.

[0042] It can be understood that the first suction port 11 is constructed as a plurality of strip holes arranged in sequence along the width direction of the panel 10 on the first connecting plate, and the second suction port 12 is constructed as a plurality of strip holes arranged in sequence along the width direction of the panel 10 on the second connecting plate. The first guide plate 21 and the second guide plate 22 have connecting holes with an aperture much smaller than the strip holes, and noise reduction can be further achieved by changing the aperture of the strip holes and the connecting holes.

[0043] It should be noted that the structure of the range hood 100 of the present application is not limited to this. In other embodiments, there are multiple suction ports or the suction port is constructed in a ring shape. Correspondingly, a guide device 20 is provided between the multiple suction ports or in the middle area of ​​the ring-shaped suction port to isolate the airflow through guide plates corresponding to the multiple suction ports or through annular truncated cone-shaped guide plates to avoid collision of the airflow sucked in by the suction port and reduce the working noise of the range hood 100.

[0044] In some embodiments, the cross-section of the accommodating space is generally triangular, and the guide device 20 has three side surfaces, which are respectively opposite to the first suction port 11, the second suction port 12 and the middle plate, and the accommodating space is defined by the panel 10. The specific shape is not specifically limited in this application. The shape of the guide device 20 can be similar to the volume shape of the accommodating space, which can improve space utilization and ensure that a guide plate can be correspondingly arranged on each suction port to ensure the noise reduction effect of the guide device 20 on the range hood 100.

[0045] exist Figure 2 and Figure 3 In the specific embodiment shown, the first guide plate 21 and the second guide plate 22 are recessed toward each other to define a first curved surface opposite to the first suction port 11 and a second curved surface opposite to the second suction port 12 , respectively.

[0046] That is to say, the direction toward the cavity defined by the first guide plate 21, the second guide plate 22 and the panel 10 (i.e., the middle plate) (i.e., the noise reduction chamber a mentioned later) is defined as inward, and the direction away from the cavity is defined as outward, and the corresponding first guide plate 21 and second guide plate 22 are both recessed inward (i.e., recessed toward each other) to respectively define a first arc surface opposite to at least part of the strip holes arranged in sequence on the first connecting plate; the second arc surface opposite to at least part of the strip holes arranged once on the second connecting plate, guides the airflow flowing into the first suction port 11 through the first arc surface, and guides the airflow flowing into the second suction port 12 through the second arc surface, and guides the targeted airflow to ensure that the flow state of the airflow flowing into each suction port can be improved to improve the noise reduction effect.

[0047] It can be understood that, preferably, the first curved surface of the first guide plate 21 and the second curved surface of the second guide plate 22 extend in a direction away from each other, and the end at which the first guide plate 21 and the second guide plate 22 are connected is arranged adjacent to the air inlet end of the fan, and the airflow entering from the first suction port 11 can flow directly into the air inlet end under the guidance of the first guide plate 21, and the airflow entering from the second suction port 12 can flow directly into the air inlet end under the guidance of the second guide plate 22, thereby improving the exhaust efficiency of the range hood 100 and the suction effect of the range hood 100, so that the cooking fumes, combustion exhaust gas, water vapor and harmful gases in the indoor space can be quickly extracted, thereby improving the user experience of the range hood 100.

[0048] exist Figure 2 In the specific embodiment shown, the first guide plate 21, the second guide plate 22 and the panel 10 define a noise reduction chamber a. The first guide plate 21 and the second guide plate 22 are also provided with connecting holes, and the noise reduction chamber a is connected to the outside through the connecting holes.

[0049] Specifically, the middle plate of the panel 10, the first guide plate 21 and the second guide plate 22 define a noise reduction chamber a, and connecting holes are set on the first guide plate 21 and the second guide plate 22 so that the first guide plate 21 and the second guide plate 22 are both constructed as perforated plates. The perforated plates can effectively reduce the direct noise transmitted from the suction port to further reduce the working noise of the range hood 100.

[0050] Of course, the structure of the guide device 20 of the present application is not limited to this. While the first guide plate 21 and the second guide plate 22 are both constructed as perforated plates, a sound-absorbing coating or a noise-reducing coating can also be coated on the first guide plate 21 and the second guide plate 22, and the sound insulation and noise reduction effects can be further improved. At the same time, the probability of the first guide plate 21 and the second guide plate 22 resonating with the noise environment can be reduced by increasing the thickness or mode of the first guide plate 21 and the second guide plate 22, which can further reduce the noise and improve the noise reduction effect of the guide device 20.

[0051] It should be noted that the perforated plate refers to a plate-like structural member formed by punching through holes on the plate through a stamping process. The connecting holes on the perforated plate can be round holes, square holes, prismatic holes, triangular holes, five-pointed star holes, oblong holes, etc., which can effectively reduce direct transmission noise.

[0052] exist Figure 4 In the specific embodiment shown, the communicating holes on the first guide plate 21 and the second guide plate 22 are arranged in multiple rows and columns, and the porosity of the first guide plate 21 and the porosity of the second guide plate 22 are both between 6% and 7%.

[0053] Among them, multiple strip holes on the first connecting plate are arranged in sequence along the width direction of the panel 10 to define the first suction port 11, and multiple strip holes on the second connecting plate are arranged in sequence along the width direction of the panel 10 to define the second suction port 12. The width direction of the panel 10 is consistent with the length direction of the first guide plate 21 and the second guide plate 22. The connecting holes on the first guide plate 21 are arranged in rows in the length direction of the first guide plate 21, and arranged in columns in the extension direction of the first curved surface of the first guide plate 21. The connecting holes on the second guide plate 22 are arranged in rows in the length direction of the second guide plate 22, and arranged in columns in the extension direction of the second curved surface of the second guide plate 22, so that the area where the first guide plate 21 overlaps with the first suction port 11 after being projected in the length direction of the panel 10 and the area where the second guide plate 22 overlaps with the second suction port 12 after being projected in the length direction of the panel 10 are densely covered with connecting holes.

[0054] Furthermore, the porosity of the first guide plate 21 and the porosity of the second guide plate 22 are both limited to be in the range of 6%-7%. The porosity in the present application refers to the percentage of the pore area of ​​the connecting holes in the first guide plate 21 to the total area of ​​the first curved surface of the first guide plate 21, and the percentage of the pore area of ​​the connecting holes in the second guide plate 22 to the total area of ​​the second curved surface of the second guide plate 22. If the connecting holes on the first guide plate 21 and the connecting holes on the second guide plate 22 meet the above limitations, the noise in the frequency range of 400HZ-1000HZ can be effectively reduced, thereby further improving the working noise of the range hood 100 of the present application.

[0055] In some embodiments, the porosity of the first guide plate 21 and the second guide plate 22 are consistent, for example, the porosity of the first guide plate 21 and the second guide plate 22 are both 6%; in other embodiments, the porosity of the first guide plate 21 and the second guide plate 22 may be different, but the porosity of both should also be within the range of 6%-7%.

[0056] It is understandable that the aperture of the connecting hole is 0.6 mm-0.8 mm. Specifically, the aperture of the connecting hole can be 0.6 mm or 0.8 mm, so that the aperture of the connecting hole is within the range of 0.6 mm-0.8 mm, making the aperture of the connecting hole more reasonable, so as to achieve the technical effect of targeted reduction of noise at a specific frequency, ensure that the flow guide device 20 of the present application has a stable and reliable noise reduction effect, and effectively improve the working noise of the range hood 100.

[0057] exist Figure 3 and Figure 4 In the specific embodiment shown, the flow guiding device 20 further includes: a flow guiding member 23, and the flow guiding member 23 is arranged in the noise reduction chamber a.

[0058] In other words, the first guide plate 21, the second guide plate 22 and at least a portion of the panel 10 (i.e., the middle plate of the panel 10) define a noise reduction chamber a, and a guide member 23 is arranged in the noise reduction chamber a. The guide member 23 further guides the airflow entering the noise reduction chamber a through the connecting hole, and the effective depth of the noise reduction chamber a is increased by the guide member 23, thereby further improving the noise reduction effect and noise reduction frequency band of the guide device 20.

[0059] like Figure 2 and Figure 3 As shown, in some embodiments, the guide member 23 has a first labyrinth flow channel b connected to the first guide plate 21 and a second labyrinth flow channel c connected to the second guide plate 22, the first labyrinth flow channel b is used to reduce the noise of the airflow flowing in through the first suction port 11, and the second labyrinth flow channel c is used to reduce the noise of the airflow flowing in through the second suction port 12.

[0060] Specifically, the first labyrinth flow channel b and the second labyrinth flow channel c of the guide member 23 can effectively utilize the space of the noise reduction chamber a, extend the effective depth of the noise reduction chamber a, and respectively enable the noise generated by the airflow entering the first suction port 11 to be further reduced with the effective depth of the first labyrinth flow channel b, and the noise generated by the airflow entering the second suction port 12 to be further reduced with the effective depth of the second labyrinth flow channel c, so as to further improve the noise reduction effect of the guide device 20.

[0061] It can be understood that the guide member 23 includes: a first surround plate 231, a second surround plate 232 and a support plate 233, the first surround plate 231 and the second surround plate 232 are both arranged around the support plate 233, and the surround portion of the first surround plate 231 is separated from the surround portion of the second surround plate 232 to define a first labyrinth flow channel b and a second labyrinth flow channel c.

[0062] Specifically, the projection of the noise reduction chamber a in the width direction of the panel 10 is triangular, and the corresponding cross section of the support plate 233 is triangular. The surrounding portion of the first surrounding plate 231 is a multi-layer structure, which surrounds the support plate 233 layer by layer, and each layer of the surrounding portion of the first surrounding plate 231 is arranged in parallel, and the interval between each layer of the surrounding portion of the first surrounding plate 231 is 2D;

[0063] The surrounding part of the second surrounding plate 232 is also a multi-layer structure, which is surrounded by the support plate 233 layer by layer, and the surrounding part of the second surrounding plate 232 is staggered with the surrounding part of the first surrounding plate 231, and each layer of the surrounding part of the second surrounding plate 232 is arranged in parallel, and the interval between each layer of the surrounding part of the second surrounding plate 232 is 2D, so that the interval between the surrounding part of the adjacent first surrounding plate 231 and the surrounding part of the second surrounding plate 232 is D, thereby fully utilizing the space in the noise reduction chamber a, and respectively defining a first labyrinth flow channel b with a width of D and a second labyrinth flow channel c with a width of D, the entrance of the first labyrinth flow channel b is open to the first suction port 11, and the entrance of the second labyrinth flow channel c is open to the second suction port 12, so as to effectively increase the effective depth of the noise reduction chamber a.

[0064] It can be understood that in some embodiments, one end of the first surround plate 231 is arranged on one end of the panel 10 adjacent to the first suction port 11, the other end of the first surround plate 231 is connected to the support plate 233, one end of the second surround plate 232 is connected to the end on the same side of the first guide plate 21 and the second guide plate 22, and the other end of the second surround plate 232 is connected to the support plate 233.

[0065] In this way, the entrance of the first labyrinth flow channel b is formed above the diagram, and the entrance of the second labyrinth flow channel c is formed at the lower left of the diagram, so as to ensure that during the noise reduction process, the noise generated by the airflow entering the first suction port 11 and the noise generated by the airflow entering the second suction port 12 have a phase difference, further improve the noise reduction effect, and effectively utilize the space of the noise reduction chamber a.

[0066] It should be noted that increasing the effective depth of the noise reduction chamber a by the guide member 23 means that, after the surrounding part of the first surround plate 231 and the surrounding part of the second surround plate 232 are staggered, the first labyrinth flow channel b and the second labyrinth flow channel c are respectively defined, and the effective depth corresponding to the first suction port 11 is the shortest distance from the first suction port 11 to the first labyrinth flow channel b plus the length of the surrounding part of the first labyrinth flow channel b, and the effective depth of the second suction port 12 is the shortest distance from the second suction port 12 to the second labyrinth flow channel c plus the length of the surrounding part of the second labyrinth flow channel c.

[0067] The working process of the range hood 100 according to the embodiment of the present application is described in detail below.

[0068] like Figure 1As shown, the range hood 100 includes a shell, a fan is arranged in the shell, the shell below the fan is rectangular, the rectangular area of ​​the shell is opposite to the stove and the projection can cover the stove, a panel 10 is arranged below the shell, the panel 10 separates the suction space inside the range hood 100 from the stove, and the first connecting plate and the second connecting plate on both sides of the middle plate of the panel 10 are respectively provided with a first suction port 11 and a second suction port 12, which can draw air into the range hood 100 when the fan is working.

[0069] It can be understood that after the fan is turned on, the range hood 100 designed based on aerodynamics and fluid mechanics can form a negative pressure area within the range of the stove to reduce the diffusion of cooking fumes generated in the stove area during cooking. The so-called negative pressure area can be understood as an air film formed around the stove to wrap the stove. When cooking fumes are generated, they can be immediately sucked into the range hood 100 through the first suction port 11 or the second suction port 12 under the action of negative pressure. The airflow entering the range hood 100 can flow into the flow channel of the fan under the guidance of the first guide plate 21 or the second guide plate 22 respectively. A separation plate can also be set in the flow channel of the range hood 100. After the cooking fumes flow to the area where the separation plate is located, the separation plate can separate the oil and liquid in the cooking fumes, and then the cooking fumes after the oil and liquid are separated are discharged to the outside through the fan.

[0070] During the operation of the range hood 100, a local negative pressure environment is first formed in the area where the stove is located, and the cooking fumes generated during the cooking process enter the range hood 100 through the first suction port 11 or the second suction port 12. The first guide plate 21 opposite to the first suction port 11 and the second guide plate 22 opposite to the second suction port 12 guide the airflow. The first guide plate 21 and the second guide plate 22, which are perforated plates, can initially reduce the noise of the airflow, avoid collision of the airflow, and avoid vortex generation. The flow state of the airflow is improved by the first curved surface and the second curved surface. The effective depth of the noise reduction chamber a is effectively increased by the guide device 20 arranged in the noise reduction chamber a, and the airflow entering the first suction port 11 is further reduced in noise by the first labyrinth flow channel b, and the airflow entering the second suction port 12 is further reduced in noise by the second labyrinth flow channel c, so as to effectively improve the working noise of the range hood 100.

[0071] In other words, the present application can achieve the airflow isolation effect and avoid eddy noise by setting the first guide plate 21 and the second guide plate 22, and the structural setting of the perforated plate can reduce the direct transmission noise. The arc surface setting of the first guide plate 21 and the second guide plate 22 can improve the airflow flow state, and increasing the effective depth of the noise reduction chamber a can further reduce the noise at a specific frequency, so as to achieve effective noise reduction of the airflow through the technical improvements in the above multiple directions, so that the working noise of the range hood 100 is smaller and the user experience is better.

[0072] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0073] In the description of this application, "first feature" or "second feature" may include one or more of the features.

[0074] In the description of the present application, “plurality” means two or more.

[0075] In the description of the present application, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0076] In the description of the present application, “above”, “over” and “above” a first feature to a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0077] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means 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 representation of the above terms does 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.

[0078] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A range hood, characterized in that: include: A panel having a plurality of suction ports disposed in a central area of ​​the panel; A flow guide device, the flow guide device is arranged in the panel, the flow guide device includes a plurality of flow guide plates, each of the flow guide plates is arranged corresponding to one of the suction ports to separate the plurality of suction ports, and the surface of each flow guide plate facing the suction port is configured as a curved surface, the flow guide plate includes: a first flow guide plate and a second flow guide plate, the suction port includes: a first suction port and a second suction port, the first flow guide plate and the second flow guide plate are connected at one end on the same side, the first flow guide plate and the second flow guide plate are fixed at the other end on the same side of the panel, and the first flow guide plate is opposite to the first suction port, and the second flow guide plate is opposite to the second suction port; The flow guide device also includes: a flow guide member, which has a first labyrinth flow channel connected to the first guide plate and a second labyrinth flow channel connected to the second guide plate, the first labyrinth flow channel is used to reduce the noise of the airflow flowing in through the first suction port, and the second labyrinth flow channel is used to reduce the noise of the airflow flowing in through the second suction port.

2. The range hood according to claim 1, characterized in that: The first guide plate and the second guide plate are recessed toward each other to respectively define a first curved surface opposite to the first suction port and a second curved surface opposite to the second suction port.

3. The range hood according to claim 1, characterized in that: The first guide plate, the second guide plate and the panel define a noise reduction chamber. The first guide plate and the second guide plate are also provided with connecting holes, and the noise reduction chamber is connected with the outside through the connecting holes.

4. The range hood according to claim 3, characterized in that: The connecting holes on the first guide plate and the second guide plate are arranged in multiple rows and columns, and the porosity of the first guide plate and the porosity of the second guide plate are both between 6% and 7%.

5. The range hood according to claim 3, characterized in that: The aperture of the connecting hole is 0.6 mm-0.8 mm.

6. The range hood according to claim 3, characterized in that: The flow guide is arranged in the noise reduction chamber.

7. The range hood according to claim 1, characterized in that: The guide member includes: a first surround plate, a second surround plate and a support plate, the first surround plate and the second surround plate are both arranged around the support plate, and the surround portion of the first surround plate is spaced apart from the surround portion of the second surround plate to define a first labyrinth flow channel and a second labyrinth flow channel.

8. The range hood according to claim 7, characterized in that: One end of the first surround plate is arranged on one end of the panel adjacent to the first suction port, the other end of the first surround plate is connected to the support plate, one end of the second surround plate is connected to the same side end of the first guide plate and the second guide plate, and the other end of the second surround plate is connected to the support plate.

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