Range hood

Abstract

The present application relates to the technical field of household appliances, and discloses an oil fume machine comprising a housing and a sound absorption core. A flue is provided inside the housing; the sound absorption core is detachably connected to the housing and penetrates into the housing to shunt the oil fume entering the flue. In the present application, by shunting the flue through the sound absorption core, a non-linear route is formed in the flue, and the noise will naturally attenuate when passing through the flue, improving the noise reduction effect. The noise reduction core is set to penetrate into the housing and is detachably connected, so that the sound absorption core can be directly disassembled and replaced on the outer side of the housing of the range hood. Different sound absorption cores can be selected according to different requirements of the noise reduction frequency, and the selection of the noise reduction frequency is more flexible. Moreover, by regularly replacing or disassembling and cleaning the sound absorption core, it is possible to prevent the accumulation of oil fume on the surface of the sound absorption core, affecting the noise reduction effect of the sound absorption core.

Description

Technical Field

[0001] This application relates to the field of household appliance technologies, for example, to a range hood. Background Art

[0002] At present, the range hood has become one of the essential kitchen appliances in ordinary families. Generally, the range hood generates noise during operation, and this noise includes various noises generated by multiple components of the range hood. Among them, the main noise components affecting the overall noise level of the range hood are the fan and flue noises. At present, the noise reduction technology of the range hood mostly uses a sound absorption board for noise reduction.

[0003] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related technologies:

[0004] At present, the noise reduction frequency of the sound absorption board is fixed and cannot be selected. Summary of the Invention

[0005] To have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. This summary is not a general review, nor is it intended to identify key / important constituent elements or delineate the protection scope of these embodiments. Instead, it serves as a preface to the subsequent detailed description.

[0006] The embodiments of the present disclosure provide a range hood to solve the problem that the noise reduction frequency of the sound absorption board at present is fixed and cannot be selected.

[0007] In some embodiments, the range hood includes: a housing and a noise reduction core. A flue is provided inside the housing; the noise reduction core is detachably connected to the housing and penetrates into the housing to divert the oil fume entering the flue.

[0008] The range hood provided by the embodiments of the present disclosure can achieve the following technical effects:

[0009] By diverting the flue through the noise reduction core, a non-linear route is formed in the flue, and the noise will naturally attenuate when passing through the flue, improving the noise reduction effect. The noise reduction core is set to penetrate into the housing and is detachably connected, so that the noise reduction core can be directly disassembled and replaced on the outside of the housing of the range hood. Different noise reduction cores can be selected according to different requirements of the noise reduction frequency, and the selection of the noise reduction frequency is more flexible. Moreover, by regularly replacing or disassembling and cleaning the noise reduction core, it is possible to prevent the oil fume from accumulating on the surface of the noise reduction core and affecting the noise reduction effect of the noise reduction core.

[0010] The above general description and the following description are only exemplary and explanatory, and are not used to limit this application. Brief Description of the Drawings

[0011] One or more embodiments are exemplarily illustrated by corresponding drawings. These exemplary illustrations and the drawings do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation, and wherein:

[0012] Figure 1 is a schematic structural view of an oil fume extractor provided by an embodiment of the present disclosure;

[0013] Figure 2 is a side sectional view of an oil fume extractor provided by an embodiment of the present disclosure;

[0014] Figure 3 is a schematic structural view of another oil fume extractor provided by an embodiment of the present disclosure;

[0015] Figure 4 is a side sectional view of another oil fume extractor provided by an embodiment of the present disclosure;

[0016] Figure 5 is a sectional view of a cover plate provided by an embodiment of the present disclosure;

[0017] Figure 6 is a schematic structural view of a silencing core provided by an embodiment of the present disclosure;

[0018] Figure 7 is an exploded view of a silencing core provided by an embodiment of the present disclosure;

[0019] Figure 8 is a schematic structural view of another oil fume extractor provided by an embodiment of the present disclosure;

[0020] Figure 9 is a side sectional view of another oil fume extractor provided by an embodiment of the present disclosure;

[0021] Figure 10 is a schematic structural view of another silencing core provided by an embodiment of the present disclosure;

[0022] Figure 11 is an exploded view of another silencing core provided by an embodiment of the present disclosure;

[0023] Figure 12 is a sectional view of another oil fume extractor provided by an embodiment of the present disclosure;

[0024] Figure 13 is a front view of a microplate provided by an embodiment of the present disclosure;

[0025] Figure 14 is a side view of a microplate provided by an embodiment of the present disclosure.

[0026] Reference numerals:

[0027] 100, housing; 101, flue; 102, mounting hole; 103, partition board; 200, groove; 201, cover plate; 202, sound insulation layer; 203, thermal insulation layer; 204, bracket; 300, sound absorption core; 301, connecting part; 302, sound absorption part; 303, housing connecting piece; 304, sound absorption connecting rod; 305, connecting hole; 306, positioning protrusion; 307, positioning groove; 400, microporous plate; 401, orifice plate; 402, perforation; 403, back plate; 500, seal; 600, sound absorption layer. Detailed implementation manners

[0028] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for reference and illustration purposes only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of explanation, a plurality of details are provided to provide a full understanding of the disclosed embodiments. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and devices can be shown in a simplified manner to simplify the drawings.

[0029] In the embodiments of the present disclosure, terms such as "first" and "second" in the description and claims of the embodiments and the above accompanying drawings are used to distinguish similar objects and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so as to implement the embodiments of the present disclosure described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0030] In the embodiments of the present disclosure, the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "middle", "outer", "front", and "rear" is based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly used to better describe the embodiments of the present disclosure and their embodiments and are not used to limit that the indicated devices, elements, or components must have a specific orientation or be constructed and operated in a specific orientation. And, in addition to being able to represent an orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0031] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0032] Unless otherwise stated, the term "plurality" means two or more.

[0033] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0034] Combination Figures 1-7 As shown, the embodiment of the present disclosure provides a range hood including: a shell 100 and a groove 200 , wherein a flue 101 is provided inside the shell 100 ; the groove 200 is provided on the shell 100 , and the portion recessed in the shell 100 diverts the oil smoke entering the flue 101 .

[0035] The range hood provided by the embodiment of the present disclosure can divert the flue 101 of the range hood through the groove 200, so that the flue 101 forms a non-linear shape. The noise is naturally attenuated when passing through the non-linear flue 101, thereby reducing the noise. The opening of the groove 200 is on the shell 100, and objects can be placed in the groove 200. The temperature of the oil smoke passing through the flue 101 is often relatively high, so that the temperature in the groove 200 is relatively high, and some items that need to be kept warm can be stored. The range hood has a better noise reduction effect while being able to store objects, thereby improving the utilization of the internal space of the range hood.

[0036] Optionally, the groove 200 is a recessed portion on the housing 100 and is an integrally formed structure with the housing 100. In this way, the groove 200 is completely isolated from the inner space of the housing 100, preventing the oil smoke from flowing out of the housing 100 from the groove 200.

[0037] Optionally, the side of the groove 200 facing the air inlet end of the flue 101 is arc-shaped. In this way, the arc-shaped structure of the groove 200 can divert the oil smoke passing through the flue 101, so that the oil smoke can be evenly diverted to both sides of the groove 200, and the diversion is more uniform, which can effectively reduce wind resistance.

[0038] Optionally, the groove 200 is circular. In this way, the circular groove 200 is arc-shaped all around, which is convenient for diverting the oil smoke entering the flue 101, so that the airflow is uniform everywhere on the side wall of the groove 200, the formation of vortex is reduced, the oil smoke is better guided, and the circulation efficiency of the oil smoke is improved.

[0039] Optionally, the part of the flue 101 corresponding to the side wall of the groove 200 expands to both sides. In this way, the part of the flue 101 corresponding to the groove 200 expands, preventing the part of the flue 101 corresponding to the groove 200 from being too narrow and affecting the passage of lampblack.

[0040] Optionally, the part of the flue 101 corresponding to the side wall of the groove 200 is the inner walls of the parts of the flue 101 corresponding to the left and right sides of the groove 200.

[0041] Optionally, the shape of the flue 101 expanding to both sides is the same as the shape of the side wall of the groove 200. In this way, the width of the flue 101 corresponding to the side wall of the groove 200 can be made uniform, keeping the passage of lampblack smooth and improving the flow efficiency of lampblack in the flue 101.

[0042] Optionally, the part of the flue 101 corresponding to the side wall of the groove 200 expands to both sides in an arc shape. In this way, when the lampblack passes through the groove 200 in the flue 101, it can be shunted to both sides to form a semi-circular channel. When the noise is transmitted outward through the flue 101, it also needs to pass through the semi-circular channel, causing the noise to undergo natural attenuation in the semi-circular channel, reducing the noise and improving the noise reduction effect of the range hood.

[0043] Optionally, a sound-absorbing core 300 is provided on the inner wall of the groove 200. In this way, by providing the sound-absorbing core 300 on the groove 200, the noise in the flue 101 can be absorbed by the sound-absorbing core 300, improving the noise reduction effect of the range hood.

[0044] Optionally, the connection between the sound-absorbing core 300 and the groove 200 is detachable. In this way, the sound-absorbing core 300 can be replaced, and different sound-absorbing cores 300 can be selected according to different requirements of the noise reduction frequency, making the selection of the noise reduction frequency more flexible.

[0045] Optionally, the sound-absorbing core 300 includes: a connecting part 301, which is snap-connected or screwed to the groove 200; a sound-absorbing part 302, which is connected to the connecting part 301. In this way, the sound-absorbing core 300 is installed in the groove 200 by snap connection, facilitating the disassembly and installation of the sound-absorbing core 300.

[0046] Optionally, a storage board is provided in the groove 200. In this way, items can be placed on the storage board provided in the groove 200, facilitating the storage of items in the groove 200 and improving the utilization rate of the internal space of the range hood.

[0047] Optionally, the connection between the storage board and the inner wall of the groove 200 is detachable. In this way, the storage space in the groove 200 can be changed by disassembling the storage board, making the storage space in the groove 200 more variable.

[0048] Optionally, slots are provided on both sides of the inner wall of the groove 200, and the storage plate is inserted into the slots. In this way, the storage plate is fixed through the plug-in structure, which is convenient for installation, and inserting the storage plate into the slots does not affect the load-bearing capacity of the storage plate.

[0049] Optionally, the groove 200 opens towards the front side of the housing 100, and a cover plate 201 is provided on the opening. In this way, it is convenient for the user to store items in the groove 200 through the front opening, and the opening is closed by the cover plate 201, so that an independent space is formed in the groove 200, which is more convenient for storage.

[0050] Optionally, the cover plate 201 includes: a sound insulation layer 202 and a heat insulation layer 203. In this way, the cover plate 201 has good sound insulation and heat insulation effects, improves the noise reduction effect of the range hood, and enables the cover plate 201 to maintain the temperature in the groove 200 of the range hood, which is convenient for storing some items that need to be kept warm or heated.

[0051] Optionally, the cover plate 201 further includes: a bracket 204, with a heat insulation layer 203 provided on the inner side and a sound insulation layer 202 provided on the outer side. In this way, setting the heat insulation layer 203 on the inner side makes the heat insulation effect better.

[0052] Optionally, the cover plate 201 is connected to the housing 100 through a hinge. In this way, it is convenient to open the cover plate 201.

[0053] Optionally, the cover plate 201 is fixed to the housing 100 through magnetic attraction or a buckle. In this way, it remains fixed when the cover plate 201 is closed to prevent automatic opening.

[0054] Optionally, a partition plate 103 is further provided in the flue 101, which is configured to divide the flue 101 into independent flue paths. In this way, a partition plate 103 is provided in the flue 101 of the range hood to divide the flue 101 into independent flue gas flow paths, which can relatively reduce the ventilation cross-sectional area, increase the noise absorption area, increase the high-frequency failure cut-off frequency of the noise, broaden the sound absorption frequency band, enhance the sound absorption effect, and can increase the fluid flow velocity and accelerate the smoking speed.

[0055] Optionally, the partition plate 103 is of a hollow structure, and a sound absorption material is filled inside. In this way, by filling the sound absorption material in the partition plate 103, the medium and high-frequency noise in the flue can be absorbed, and the noise reduction effect can be improved.

[0056] Optionally, the sound absorption material is fiber type, foam type, etc.

[0057] Combined Figures 8-11 As shown, another range hood provided by an embodiment of the present disclosure includes: a housing 100 and a sound absorption core 300. A flue 101 is provided inside the housing 100; the sound absorption core 300 is detachably connected to the housing 100 and penetrates into the housing 100 to divide the oil fume entering the flue 101.

[0058] By using the range hood provided in the embodiments of the present disclosure, the flue 101 can be shunted by the sound-absorbing core 300, so that the flue 101 forms a non-linear route. The noise will naturally attenuate when passing through the flue 101, improving the noise reduction effect. The noise reduction core is arranged to penetrate into the housing 100 and is detachably connected, and the sound-absorbing core 300 can be directly disassembled and replaced outside the housing 100 of the range hood. Different sound-absorbing cores 300 can be selected according to different requirements of the noise reduction frequency, and the selection of the noise reduction frequency is more flexible. And by regularly replacing or disassembling and cleaning the sound-absorbing core 300, it can prevent oil fume from accumulating on the surface of the sound-absorbing core 300 and affecting the noise reduction effect of the sound-absorbing core 300.

[0059] Optionally, the housing 100 is provided with an installation hole 102 communicating with the flue 101, and the sound-absorbing core 300 passes through the installation hole 102 and is inserted into the flue 101. In this way, the sound-absorbing core 300 can be disassembled or installed outside the housing 100, facilitating the disassembly and replacement of the sound-absorbing core 300.

[0060] Optionally, a sealing gasket is provided between the rear side of the sound-absorbing core 300 and the inner wall of the flue 101. In this way, a high tightness is maintained between the sound-absorbing core 300 and the side wall of the flue 101, preventing oil fume from passing through the narrow gap between the sound-absorbing core 300 and the side wall of the flue 101 to form sharp airflow noise.

[0061] Optionally, the sound-absorbing core 300 penetrates into the housing 100 perpendicular to the flue 101. In this way, the sound-absorbing core 300 is arranged perpendicular to the flue 101, making the flow of the oil fume in the flue 101 more stable and balanced after being shunted by the sound-absorbing core 300, preventing the generation of oil fume flow noise, and the sound-absorbing core 300 arranged perpendicular to the flue 101 is more convenient to install.

[0062] Optionally, the sound-absorbing core 300 passes through the center line of the flue 101 to evenly shunt the oil fume entering the flue 101. In this way, the sound-absorbing core 300 evenly shunts the oil fume entering the flue 101, making the flow of the oil fume on both sides of the sound-absorbing core 300 more balanced, and preventing the formation of turbulent flow due to uneven air flow and increasing additional noise.

[0063] Optionally, the center line of the flue 101 is a straight line passing through the center point inside the flue 101 along the air flow direction in the flue 101.

[0064] Optionally, the center line of the sound-absorbing core 300 passes through the center line of the flue 101. In this way, the sound-absorbing core 300 is exactly located in the middle of the flue 101, dividing the flue 101 into two channels evenly, and further shunting the oil fume in the flue 101, making the shunting of the oil fume more uniform.

[0065] Optionally, the center line of the sound-absorbing core 300 is a straight line passing through the midpoint of the sound-absorbing core 300 and perpendicular to the center line of the flue 101.

[0066] Optionally, the part of the side wall of the flue 101 corresponding to the muffler core 300 expands to both sides. In this way, the part of the flue 101 corresponding to the muffler core 300 is expanded to prevent the part of the flue 101 corresponding to the muffler core 300 from being too narrow to affect the passage of oil smoke.

[0067] Optionally, the outwardly expanded portion of the side wall of the flue 101 corresponding to the muffler core 300 has the same shape as the side wall of the muffler core 300. In this way, the width of the flue 101 corresponding to the side wall of the muffler core 300 can be made uniform, so that the oil smoke can pass smoothly and the efficiency of the oil smoke flowing in the flue 101 can be improved.

[0068] Optionally, the side of the muffler core 300 facing the air inlet end of the flue 101 is arc-shaped. In this way, the oil smoke in the flue 101 is diverted by the arc on one side of the muffler core 300, so that the oil smoke is evenly diverted to both sides of the muffler core 300, and the diversion is more uniform, which can effectively reduce wind resistance.

[0069] Optionally, the muffler core 300 is circular. In this way, the four sides of the circular muffler core 300 are all arc-shaped, which is convenient for diverting the oil smoke entering the flue 101, so that the airflow is uniform everywhere on the side wall of the muffler core 300, the formation of vortex is reduced, the oil smoke is better guided, and the circulation efficiency of the oil smoke is improved.

[0070] Optionally, the part of the side wall of the flue 101 corresponding to the muffler core 300 expands outward in an arc shape. In this way, the oil smoke can be diverted to both sides to form a semicircular channel when passing through the muffler core 300 in the flue 101, so that the noise also needs to pass through the semicircular channel when transmitting outward through the flue 101, so that the noise is naturally lost in the semicircular channel, reducing the noise and improving the noise reduction effect of the range hood.

[0071] Optionally, the interior of the muffler core 300 is a hollow structure. In this way, the interior of the muffler core 300 is a hollow structure, and items can be stored in the hollow structure, so that the range hood maintains a good noise reduction effect while allowing appropriate storage to improve the utilization rate of the interior space of the range hood.

[0072] Optionally, the shape of the hollow structure inside the silencer core 300 is the same as that of the silencer core 300 and is located at the center of the silencer core 300. In this way, the thickness of the side wall of the silencer core 300 can be made more uniform, the noise absorption effect can be better, and the noise reduction effect of the range hood can be improved.

[0073] Optionally, the silencer core 300 includes: a connection portion 301, including a shell connection piece 303 and a silencer connection rod 304 perpendicular to the shell connection piece 303; and a silencer portion 302, connected to the silencer connection rod 304. In this way, the silencer core 300 can be better connected to the shell 100, and the disassembly and installation of the silencer core 300 are convenient.

[0074] Optionally, the sound-absorbing core 300 is circular, and the housing connecting piece 303 is disc-shaped. There is a threaded connection between the disc-shaped housing connecting piece 303 and the housing 100. In this way, the sound-absorbing core 300 is installed on the housing 100 through the threaded connection, which is convenient for installation. Moreover, the threaded connection makes the connection between the disc-shaped housing connecting piece 303 and the housing 100 tighter, preventing oil fume from leaking through the gap between the housing connecting piece 303 and the housing 100.

[0075] Optionally, the connection between the housing connecting piece 303 and the housing 100 is a plug-in connection method. In this way, through the plug-in connection method, it is more convenient to disassemble the sound-absorbing core 300.

[0076] Optionally, the size of the housing connecting piece 303 is larger than the size of the mounting hole 102 on the housing 100. In this way, the housing connecting piece 303 can cover the mounting hole 102, preventing oil fume from leaking through the mounting hole 102.

[0077] Optionally, the sound-absorbing connecting rod 304 is vertically connected to the center point of the housing connecting piece 303. In this way, the sound-absorbing part 302 installed on the sound-absorbing connecting rod 304 is concentric with the housing connecting piece 303, keeping the thickness of each part of the sound-absorbing part 302 consistent and improving the noise reduction effect.

[0078] Optionally, there is a sealed connection between the connecting part 301 and the housing 100. In this way, the connection between the connecting part 301 and the housing 100 is tight, preventing oil fume from leaking through the gap between the connecting part 301 and the housing 100.

[0079] Optionally, a sealing gasket is provided in the gap between the connecting part 301 and the housing 100. In this way, the sealing performance between the sound-absorbing core 300 and the housing 100 can be maintained, preventing oil fume from leaking.

[0080] Optionally, an oil-proof sound-permeable layer is provided on the outside of the sound-absorbing part 302. In this way, it can prevent oil fume from solidifying and adsorbing on the sound-absorbing part 302, thereby affecting the sound-absorbing effect of the sound-absorbing part 302.

[0081] Optionally, the oil-proof sound-permeable layer is a film made of polytetrafluoroethylene material. In this way, polytetrafluoroethylene has good oil repellency, which can prevent oil from adhering to the sound-absorbing part 302 and affecting the noise reduction effect of the sound-absorbing part 302.

[0082] Optionally, the connection between the sound-absorbing part 302 and the sound-absorbing connecting rod 304 is a detachable connection. In this way, the sound-absorbing part 302 can be disassembled separately, which is convenient for separately replacing the sound-absorbing part 302 and reusing the connecting part 301, saving costs.

[0083] Optionally, a connection hole 305 is provided in the middle of the sound insulation part 302, and the connection hole 305 is connected to the sound insulation connecting rod 304. In this way, the sound insulation part 302 can be sleeved on the sound insulation connecting rod 304 to keep the thickness of each part of the sound insulation part 302 uniform and improve the noise reduction effect of the sound insulation part 302.

[0084] Optionally, the sound insulation connecting rod 304 and the connection hole 305 are connected by threads. In this way, the connection by threads is more stable, which can prevent the sound insulation part 302 from falling off and prevent it from rotating when the position of the sound insulation core 300 is restricted.

[0085] Optionally, a positioning protrusion 306 is provided on the sound insulation connecting rod 304, and a positioning groove 307 extending along the depth direction of the connection hole 305 is provided in the connection hole 305. In this way, after the positioning protrusion 306 is inserted into the positioning groove 307, the sound insulation part 302 can be prevented from rotating along the sound insulation connecting rod 304 to maintain the stability of the sound insulation part 302.

[0086] Optionally, the diameter of the sound insulation part 302 is less than or equal to the diameter of the disk-shaped housing connecting piece 303. In this way, the sound insulation part 302 can be directly inserted into the interior of the housing 100 through the mounting hole 102, which is convenient for the disassembly and installation of the sound insulation core 300.

[0087] Optionally, the sound insulation part 302 is made of sound-absorbing materials such as fiber and foam. In this way, the noise at medium and high frequencies can be reduced.

[0088] Combined Figures 12-14 As shown in the figure, another range hood provided by an embodiment of the present disclosure includes: a flue 101 and a microporous plate 400. The microporous plate 400 covers the side wall of the flue 101, and a seal 500 is provided in the gap between the microporous plate 400 and the flue 101.

[0089] By using the range hood provided by the embodiment of the present disclosure, a microporous plate 400 is arranged in the flue 101 of the range hood, and the gap between the microporous plate 400 and the flue 101 is sealed to prevent the air flow from generating additional noise through the narrow gap. The microporous plate 400 is small in volume and good in noise reduction effect, which can ensure the noise reduction effect when the internal space of the range hood is limited. In addition, the microporous plate 400 is moisture-resistant and not easily damaged, and has a long service life.

[0090] Optionally, the microporous plate 400 includes: a hole plate 401 provided with through holes 402; and a back plate 403 covering one side of the hole plate 401 and having an air layer between the back plate 403 and the hole plate 401. In this way, the noise enters the air layer between the hole plate 401 and the back plate 403 through the through holes 402 and resonates in the air layer to attenuate the noise, achieving a better noise reduction effect in a limited space.

[0091] Optionally, there are multiple microplates 400, and at least one of the following parameters of different microplates 400 is different: perforation rate; plate thickness; perforation diameter; air layer thickness. In this way, the perforation rate, plate thickness, perforation diameter, and air layer thickness on the microplate 400 all directly affect the noise reduction frequency of the microplate 400. By setting multiple different microplates 400, the range hood can absorb various frequencies of noise, improving the noise reduction effect of the range hood.

[0092] Optionally, the relationship between the noise reduction frequency and the perforation rate, plate thickness, perforation diameter, and air layer thickness is as follows:

[0093] Among them,

[0094] f r is the noise reduction frequency; c is the speed of sound; P is the perforation rate; t is the plate thickness, that is, the thickness of the orifice plate 401; d is the perforation diameter; L is the air layer thickness. With this optional embodiment, the values of each parameter are adjusted according to the formula so that it can absorb different frequencies of noise.

[0095] Optionally, a seal 500 is also provided in the gap between multiple microplates 400. In this way, the gap between multiple microplates 400 is sealed by the seal 500, preventing the air flow from forming sharp noises through the narrow gap and reducing the generation of noise.

[0096] Optionally, multiple microplates 400 are connected by welding. In this way, multiple microplates 400 are connected into one body by welding, making the microplates 400 form a large whole, improving the connection stability between the microplates 400, and avoiding the formation of gaps between the microplates 400, thereby preventing the air flow from forming sharp noises through the narrow gap.

[0097] Optionally, the flue 101 is a rectangular flue 101, and a rectangle is formed by four different microplates 400, so that it just covers part or all of the four side walls of the flue 101. In this way, each position in the flue 101 can absorb different frequencies of noise, improving the noise reduction effect.

[0098] Optionally, the seal 500 is a rubber gasket or sealant. In this way, using a rubber gasket for sealing facilitates the installation and disassembly of the microplate 400, which is beneficial for the replacement of the microplate 400, and the sealing effect is better with sealant.

[0099] Optionally, the rubber gasket is attached to the other sides of the microplate 400 except the side with the perforations 402. In this way, the sides of the microplate 400 in contact with the flue 101 and the sides in contact with each other between the microplates 400 can all be in contact through the rubber gasket, improving the sealing effect on the gap, preventing the air flow from generating sharp noises through the gap, and improving the noise reduction effect of the range hood.

[0100] Optionally, one side of the microplate 400 is covered with an oil-proof sound-transmitting film. In this way, the oil fume condensate is prevented from sticking to the microplate 400 through the oil-proof sound-transmitting film, which may cause blockage of the perforations 402 on the microplate 400 and thus affect the noise reduction effect of the microplate 400.

[0101] Optionally, the oil-proof sound-transmitting layer is a film made of polytetrafluoroethylene material. In this way, polytetrafluoroethylene has good oil repellency, which can prevent oil from adhering to the sound-absorbing part 302 and affecting the noise reduction effect of the sound-absorbing part 302.

[0102] Optionally, the connection between the microplate 400 and the flue 101 is detachable. In this way, the microplate 400 can be disassembled and replaced, and by replacing different microplates 400, the frequency selectivity of the noise reduction of the range hood is higher, improving the noise reduction effect.

[0103] Optionally, the microplate 400 and the flue 101 are fixed by screws. In this way, the microplate 400 and the flue 101 are fixed more firmly, and it is also convenient to disassemble the microplate 400 and the flue 101.

[0104] Optionally, the microplate 400 and the flue 101 are connected by a buckle. In this way, the connection by the buckle is more convenient and fast during installation and disassembly.

[0105] Optionally, the side wall of the flue 101 is provided with a claw, and one side surface of the microplate 400 is provided with a slot. In this way, the microplate 400 is fixed on the side wall of the flue 101 by the claw being inserted into the slot. The claw is arranged on the side wall of the flue 101 without damaging the side wall of the flue 101, preventing the oil fume from escaping from the side wall of the flue 101.

[0106] Optionally, the side wall of the flue 101 is also covered with a sound-absorbing layer 600. In this way, by covering the sound-absorbing layer 600, the space inside the range hood is fully utilized, making the noise reduction effect of the range hood better.

[0107] Optionally, the sound-absorbing layer 600 is arranged in the space between the outer side wall of the flue 101 and the housing 100. In this way, the space between the side wall of the flue 101 and the housing 100 is fully utilized, reducing the amount of noise directly transmitted through the flue 101 and penetrating the housing 100, improving the noise reduction effect.

[0108] Optionally, the flue 101 includes a straight part, and the internal air flow direction is parallel to its inner wall. In this way, the oil fume in the flue 101 will not impact the inner wall of the flue 101 during flow, reducing the impact force on the microplate 400 and preventing the air flow from pouring into the perforations 402 of the microplate 400, thereby affecting the noise reduction effect of the microplate 400.

[0109] Optionally, the microplate 400 is disposed on the side wall of the straight portion of the flue 101. In this way, the airflow direction inside the straight portion is parallel to its inner wall, reducing the impact force on the microplate 400 and preventing the airflow from entering the perforations 402 of the microplate 400, thereby affecting the noise reduction effect of the microplate 400.

[0110] The above description and the drawings sufficiently illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural and other changes. Embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Parts and features of some embodiments may be included in or substituted for parts and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An oil fume extractor, characterized in that, Comprising: A housing with a flue inside. A groove is provided on the housing, and the part sunken inside the housing diverts the oil fume entering the flue. The opening of the groove is on the housing, and objects can be placed in the groove. A silencing core is detachably connected to the housing and penetrates the housing to divert the oil fume entering the flue. The silencing core penetrates the housing perpendicular to the flue. The silencing core passes through the center line of the flue to evenly divert the oil fume entering the flue. The silencing core is provided on the inner wall of the groove, and the silencing core and the groove are detachably connected, and the silencing core can be replaced.

2. The range hood according to claim 1, wherein, The part of the side wall of the flue corresponding to the silencing core expands to both sides.

3. The range hood according to claim 1, characterized in that, One side of the silencing core facing the air inlet end of the flue is arc-shaped.

4. The range hood according to claim 1, wherein The inside of the silencing core is a hollow structure.

5. The range hood according to any one of claims 1 to 4, characterized in that, The silencing core includes: A connecting part, a housing connecting piece, and a silencing connecting rod perpendicular to the housing connecting piece; a silencing part connected to the silencing connecting rod.

6. The range hood according to claim 5, wherein, The connecting part is sealingly connected to the housing.

7. The range hood according to claim 5, characterized in that, An oil-proof sound-permeable layer is provided on the outside of the silencing part.

8. The range hood according to claim 5, wherein, The silencing part and the silencing connecting rod are detachably connected.

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