Range hood with flow guide part

Abstract

The utility model relates to the technical field of kitchen equipment, and discloses a range hood with a flow guide part, which comprises a smoke collecting cavity, an air bellow and the flow guide part, the air bellow comprises an air bellow body arranged at the top of the smoke collecting cavity and a fan arranged in the air bellow body, a main air inlet is formed at the rear end of the fan, and an auxiliary air inlet is formed at the front end of the fan. The draught fan is provided with an air outlet with an opening facing one side of the top of the air bellow body, the flow guide piece is located in the air bellow body and arranged at the corner, away from the air outlet, of the rear end of the main air inlet, the flow guide piece is provided with an air guide plate which forms an angle with the plane where the main air inlet is located, and a plurality of first silencing holes are formed in the air guide plate at intervals. According to the air bellow, the flow guide part is arranged in the air bellow body, so that oil smoke airflow can be guided to mainly enter the fan from the main air inlet of the fan, the oil smoke airflow flowing to the auxiliary air inlet is reduced, vortex airflow is pressed, the smoothness of the oil smoke airflow is improved, the air inlet effect and the air inlet efficiency are improved, and noise is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen equipment, in particular to a range hood with a flow guide member. Background Art

[0002] A range hood can quickly suck away the harmful oil fumes to the human body during the combustion of a cooking stove and the cooking process of stir-frying, discharge them outdoors, and play a role in purifying the kitchen environment, and has been widely used.

[0003] Currently, affected by its own structural dimensions, the intake at the main air inlet of the fan of the range hood is narrow, and the uniformity of the incoming air flow is poor. The oil fumes with a relatively high flow rate are likely to flow to the top of the air box body, and then enter the fan from the secondary air inlet, and swirl between the main air inlet of the fan and the rear end of the air box body to form a vortex air flow, resulting in air flow blockage, poor air intake effect of the fan, and relatively large noise. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a range hood with a flow guide member, which effectively solves the problems that a vortex air flow is easily formed between the main air inlet of the fan of the range hood and the rear end of the air box body, the air intake is uneven, resulting in a poor air intake effect and excessive noise.

[0005] The above technical problem is solved by the following technical solutions:

[0006] A range hood with a flow guide member includes a smoke collecting cavity, an air box, and a flow guide member with a cavity formed inside. The air box includes an air box body provided at the top of the smoke collecting cavity and a fan provided inside the air box body. The rear end of the fan forms a main air inlet, the front end of the fan forms a secondary air inlet, the fan is provided with an air outlet with an opening facing the top side of the air box body. The flow guide member is located inside the air box body and is provided at the corner of the rear end of the main air inlet far from the air outlet. The flow guide member is provided with a wind guide plate arranged at an angle with the plane where the main air inlet is located. A plurality of first sound absorption holes are spaced apart on the wind guide plate. The top surface of the flow guide member is connected to the top wall of the air box body, one side surface of the flow guide member far from the air outlet is connected to the side wall of the air box body, the front side surface of the flow guide member abuts against the fan, and the rear side surface of the flow guide member abuts against the back plate of the air box body.

[0007] Compared with the background art, the range hood of the present utility model has the following beneficial effects: By arranging the flow guide member at the corner of the rear end of the main air inlet away from the air outlet, and the flow guide member is provided with a wind guide plate arranged at an angle to the plane where the main air inlet is located. After the range hood works, when the rising oil fume airflow flows to the top of the air box body, more airflow will be blocked by the wind guide plate and flow to the main air inlet, thereby reducing the oil fume airflow from flowing from the top of the air box body to the auxiliary air inlet, so as to destroy the formation of the vortex airflow at the upper end of the main air inlet, reduce the influence of the vortex airflow on the incoming air airflow, improve the smoothness of the incoming air airflow, and further improve the incoming air effect and incoming air efficiency. In addition, it can also reduce the noise generated by the vortex airflow, and the use experience is better. Since the oil fume airflow mainly flows from the side of the air box body away from the air outlet to the auxiliary air inlet after entering the top of the air box body and forms a vortex airflow here, arranging the flow guide member at the corner of the rear end of the main air inlet away from the air outlet can destroy the formation of the turbine airflow. Compared with the structure of arranging a whole flow guide plate on the top of the air box body, the use cost can also be reduced.

[0008] Moreover, a cavity is formed inside the flow guide member, and a plurality of first sound absorption holes are spaced apart on the wind guide plate. When the noise passes through the first sound absorption holes, it is absorbed by the first sound absorption holes and attenuated. After the noise enters the cavity, it is disturbed with the air in the cavity, thereby reducing the intensity of the noise sound wave to reduce the noise, and the use experience is better.

[0009] In one embodiment, the flow guide member includes a first panel and a second panel that enclose the cavity and are oppositely arranged in the front-rear direction of the range hood, the wind guide plate arranged on the side of the first panel and the second panel facing the main air inlet, the side mounting plates arranged on the side of the first panel and the second panel away from the wind guide plate, and the top mounting plates arranged on the top of the first panel and the second panel. The wind guide plate is arranged at the outer edge of the main air inlet.

[0010] In one embodiment, the wind guide plate includes a sub-wind guide plate or a plurality of sub-wind guide plates connected at an angle in sequence. At least part of the sub-wind guide plates are inclined inward from top to bottom towards the direction where the cavity is located, so that the plurality of sub-wind guide plates are adapted to the surface of the fan.

[0011] In one embodiment, a plurality of second sound absorption holes are spaced on the first panel;

[0012] The aperture range of the first sound absorption hole and / or the second sound absorption hole is 1 mm to 5 mm;

[0013] The perforation rate range of the first panel and / or the wind guide plate is 6% to 24%.

[0014] In one embodiment, the aperture diameter of the first sound-absorbing hole is less than or equal to the aperture diameter of the second sound-absorbing hole, and the perforation rate of the air deflector is greater than or equal to the perforation rate of the first panel.

[0015] In one embodiment, a sound-absorbing layer is respectively attached to the inner sides of the air deflector and / or the first panel, and the sound-absorbing layer respectively covers a plurality of the first sound-absorbing holes and / or a plurality of the second sound-absorbing holes.

[0016] In one embodiment, the thickness range of the first panel and / or the air deflector is 0.4 mm to 1 mm.

[0017] In one embodiment, the thickness of the air deflector is less than or equal to the thickness of the first panel.

[0018] In one embodiment, the air deflector extends from front to back towards the rear side of the air box body and is inclined towards the direction where the main air inlet is located.

[0019] In one embodiment, the top surface of the top surface mounting plate is connected to the inner top of the air box body, the side surface mounting plate is connected to the inner side surface of the air box body, the first panel is in contact with the outer surface of the fan, and the second panel is flush with the rear end surface of the air box body. Description of the Drawings

[0020] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a partial structural schematic diagram of a range hood with a flow guiding member according to an embodiment of the present invention;

[0022] Figure 2 It is a partial enlarged view of a range hood with a flow guiding member according to an embodiment of the present invention;

[0023] Figure 3 It is a partial enlarged view of another angle of a range hood with a flow guiding member according to an embodiment of the present invention;

[0024] Figure 4 It is an internal structural schematic diagram of a range hood with a flow guiding member according to an embodiment of the present invention;

[0025] Figure 5 It is a structural schematic diagram of the flow guiding member according to an embodiment of the present invention;

[0026] Figure 6 Another structural schematic diagram of Figure 5 from another angle;

[0027] Figure 7 Structural schematic diagram of the flow guiding member of another embodiment of the present utility model;

[0028] Figure 8 Another Figure 7 left view of

[0029] Figure 9 Another Figure 7 rear view of

[0030] Explanation of reference numerals in the drawings:

[0031] 1, smoke collecting cavity; 2, air box; 201, air box body; 202, fan; 2021, main air inlet; 2022, auxiliary air inlet; 2023, air outlet; 3, flow guiding member; 301, first panel; 302, second panel; 303, air guiding plate; 3031, first sub-air guiding plate; 3032, second sub-air guiding plate; 3033, third sub-air guiding plate; 304, side mounting plate; 305, top mounting plate; 306, first sound absorption hole; 307, second sound absorption hole. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0033] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying 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 construed as a limitation to the present application.

[0034] The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "plurality" is two or more.

[0035] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0036] When the existing range hood is working, the oil fume airflow mainly enters from the air inlet at the bottom of the smoke collecting cavity, and most of the flue gas will flow into the main air inlet of the fan. There will be a small part of the oil fume airflow flowing to the auxiliary air inlet at the bottom and the top air inlets of the air box. Limited by the size and structure of the fan, the distance between the main air inlet of the fan and the rear end of the air box body is relatively narrow. The area between the main air inlet of the fan and the rear end of the air box body serves as the rear end of the main air inlet. When the flue gas enters the rear end of the main air inlet of the fan where the cross-sectional area suddenly decreases, it is easy to cause uneven air intake, making the oil fume airflow with a relatively high velocity flow towards the top of the air box body. Since there is a gap between the top of the air box body and the fan, this gap forms a channel connecting the main air inlet and the auxiliary air inlet of the fan. Part of the oil fume airflow enters the fan from the auxiliary air inlet after passing through this channel, and it is easy to form a vortex airflow at the rear end of the main air inlet of the fan. The vortex airflow will affect the air intake effect of the fan, resulting in a relatively low air intake efficiency of the fan and generating vortex airflow noise.

[0037] The following will be combined with Figures 1 to 9 to describe the embodiments of the present invention.

[0038] According to the embodiments of the present invention, as Figure 1 shown, a range hood with a deflector is provided, which mainly includes a smoke collecting cavity 1, an air box 2, and a deflector 3 with a cavity formed inside.

[0039] Furthermore, as Figure 1 shown, the air box 2 includes an air box body 201 provided at the top of the smoke collecting cavity 1 and a fan 202 provided inside the air box body 201. The fan 202 is used to generate negative pressure and take away the oil fume. The air box body 201 is used to support and install the fan 202 and form a flow space for the airflow. The rear end of the fan 202 forms a main air inlet 2021, and the front end of the fan 202 forms an auxiliary air inlet 2022.

[0040] The air outlet 2023 of the fan 202 is provided on one side of the top of the air box body 201 with an opening facing the top. The flow guide member 3 is located inside the air box body 201 and is provided at the corner of the rear end of the main air inlet 2021 away from the air outlet 2023. The flow guide member 3 is provided with a wind guide plate 303 arranged at an angle with the plane where the main air inlet 2021 is located. That is, the wind guide plate 303 and the plane where the main air inlet 2021 is located can be an acute angle, a right angle, or an obtuse angle. The wind guide plate 303 is used to guide more air flow into the main air inlet 2021 and block part of the air flow from entering the secondary air inlet 2022 to reduce the vortex air flow.

[0041] A plurality of first sound absorption holes 306 are spaced apart on the wind guide plate 303, which can form perforated sound absorption and noise reduction, absorb the noise inside the entire air box body 201, and achieve a good noise reduction effect. The top surface of the flow guide member 3 is connected to the top wall of the air box body 201, one side surface of the flow guide member 3 away from the air outlet 2023 is connected to the side wall of the air box body 201, the front side surface of the flow guide member 3 is in contact with the fan 202, and the rear side surface of the flow guide member 3 is in contact with the back plate of the air box body 201 to realize the firm connection between the flow guide member 3 and the air box body 201.

[0042] It can be seen that for the range hood provided by the embodiment of the present application, by arranging the flow guide member 3 at the corner of the rear end of the main air inlet 2021 away from the air outlet 2023, and the flow guide member 3 is provided with a wind guide plate 303 arranged at an angle with the plane where the main air inlet 2021 is located. After the range hood works, when the rising oil fume air flow flows to the top of the air box body 201, more air flow will be blocked by the wind guide plate 303 and then flow to the main air inlet 2021, thereby reducing the oil fume air flow from flowing from the top of the air box body 201 to the secondary air inlet 2022, so as to destroy the formation of the vortex air flow at the upper end of the main air inlet 2021, reduce the influence of the vortex air flow on the incoming air flow, improve the smoothness of the incoming air flow, and further improve the incoming air effect and incoming air efficiency. In addition, it can also reduce the noise generated by the vortex air flow, and the use experience is better. Since after the oil fume air flow enters the top of the air box body 201, it mainly flows from the side of the air box body 201 away from the air outlet 2023 to the secondary air inlet 2022 and forms a vortex air flow here, so arranging the flow guide member 3 at the corner of the rear end of the main air inlet 2021 away from the air outlet 2023 can destroy the formation of the turbine air flow. Compared with the structure of setting a whole flow guide plate on the top of the air box body 201, it can also reduce the use cost.

[0043] Moreover, a cavity is formed inside the flow guide member 3, and a plurality of first sound absorption holes 306 are spaced apart on the wind guide plate 303. When the noise passes through the first sound absorption holes 306, it is absorbed by the first sound absorption holes 306 and attenuated. After the noise enters the cavity, it disturbs the air in the cavity, thereby reducing the intensity of the noise sound wave to reduce the noise, and the use experience is better.

[0044] Compared with traditional range hoods, the embodiments of the present application can allow more oil fume to flow into the fan 202 through the main air inlet 2021 and be discharged, significantly reducing the vortex airflow, improving the smoothness of the airflow, and reducing the airflow velocity at the air outlet 2023 to mitigate the airflow impact, thereby improving the outlet blockage and enhancing the air volume and air outlet efficiency of the fan 202.

[0045] Specifically, as Figure 1 shown, the front end of the range hood refers to the side close to the user, and the rear end refers to the side far from the user, and the rear end is generally set against the wall. The main air inlet 2021 of the fan 202 is generally set at the rear end of the range hood, and the auxiliary air inlet 2022 is generally set at the front end of the range hood. The air outlet 2023 is provided on the left side of the air box body 201, and the flow guide member 3 is provided at the upper right corner of the air box body 201. The vortex airflow is mainly formed at the upper right of the air box body 201. The front, rear, left, right, up, and down directions of the embodiments of the present application are as Figure 1 shown by the arrows in

[0046] In one embodiment, as Figure 5 and Figure 6 shown, the flow guide member 3 includes a first panel 301 and a second panel 302 that enclose a cavity and are oppositely arranged in the front-rear direction of the range hood, a wind guide plate 303 provided on the side of the first panel 301 and the second panel 302 facing the main air inlet 2021, a side mounting plate 304 provided on the side of the first panel 301 and the second panel 302 away from the wind guide plate 303, and a top mounting plate 305 provided on the top of the first panel 301 and the second panel 302.

[0047] Among them, the wind guide plate 303 is provided at the outer edge of the main air inlet 3021 to prevent the wind guide plate 303 from blocking the main air inlet 3021 and affecting normal air intake. The first panel 301 is provided inside the air box body 201, and the second panel 302 is provided outside the air box body 201. The side mounting plate 304 and the top mounting plate 305 are respectively connected to the air box body 201 to install the flow guide member 3 in the air box body 201. The first panel 301, the second panel 302, the wind guide plate 303, the side mounting plate 304, and the top mounting plate 305 are spliced with each other to form a closed cavity. The splicing can be carried out by conventional methods such as welding and snap connection.

[0048] Since the first panel 301, the second panel 302, the wind guide plate 303, the side mounting plate 304, and the top mounting plate 305 jointly enclose a closed cavity, when noise propagates to the flow guide member 3, it can be attenuated by the closed cavity, and the noise will not leak from the closed cavity, thereby achieving a noise reduction effect and enhancing the user experience. When the oil fume airflow blows against the wind guide plate 303, it is blocked by the wind guide plate 303 and guided towards the main air inlet 2021, reducing the airflow entering the auxiliary air inlet 2022 to reduce the vortex airflow.

[0049] Specifically, as Figure 1 and Figure 5 shown, the cross-sectional shape of the flow guide member 3 is like a right-angled triangular plate. The air guide plate 303 serves as the hypotenuse of the right-angled triangle, and the side mounting plate 304 and the top mounting plate 305 respectively serve as the two right-angled sides of the right-angled triangle. Since the air box body 201 is generally a cuboid cavity with a right-angled corner, the cross-sectional shape of the flow guide member 3 is designed as a right-angled triangle, and the side mounting plate 304 and the top mounting plate 305 respectively serve as the two right-angled sides of the right-angled triangle. On the one hand, it is convenient to fix the flow guide member 3 at the corner of the air box body 201. On the other hand, there is no gap at the connection between the flow guide member 3 and the air box body 201, avoiding the airflow from flowing through the gap to the secondary air inlet 2022. The air guide plate 303 serves as the hypotenuse of the right-angled triangle, which can effectively reduce the airflow flowing to the secondary air inlet 2022 and guide the airflow to the main air inlet 2021.

[0050] It should be noted that the specific shape of the air guide plate 303 needs to be adapted to the specific outer shape of the fan 202 to reduce the vortex airflow.

[0051] In one embodiment, the air guide plate 303 includes a sub-air guide plate or a plurality of sub-air guide plates connected at an angle in sequence. At least part of the sub-air guide plates are inclined inward from top to bottom towards the direction of the cavity, so that the plurality of sub-air guide plates are adapted to the surface of the fan 202. It can be understood that the air guide plate 303 can be composed of one sub-air guide plate or a plurality of sub-air guide plates connected at an angle. Since the outer surface of a general fan 202 is arc-shaped and the plurality of sub-air guide plates are bent towards the direction of the cavity, the overall structure of the air guide plate 303 fits better with the surface shape of the fan 202, which is beneficial to the airflow. In addition, bending and processing the plurality of sub-air guide plates to be adapted to the surface of the fan 202 has a relatively low manufacturing difficulty and is also beneficial to reducing the use cost.

[0052] In some other embodiments, the air guide plate 303 can also be set to other shapes adapted to the outer surface of the fan 202, such as an arc shape, to further improve the smoothness of the airflow.

[0053] Exemplarily, as Figure 6 shown, the air guide plate 303 includes a first sub-air guide plate 3031, a second sub-air guide plate 3032 and a third sub-air guide plate 3033 connected at an angle in sequence. The first sub-air guide plate 3031 is disposed opposite to the side mounting plate 304. The second sub-air guide plate 3032 and the third sub-air guide plate 3033 are concave towards the direction of the cavity, that is, they are inclinedly disposed at the outer edge of the main air inlet 2021 and are adapted to the surface of the fan 202.

[0054] Furthermore, in one embodiment, as Figure 6As shown, a plurality of second sound absorption holes 307 are provided at intervals on the first panel 301. By providing a plurality of second sound absorption holes 307 at intervals on the first panel 301 located inside, the medium and low frequency noise inside the bellows box body 201 can be absorbed, and the noise reduction effect can be further improved.

[0055] In practical applications, the aperture range of the first sound absorption holes 306 and the second sound absorption holes 307 is 1 mm to 5 mm. The perforation rate range of the first panel 301 and the air guide plate 303 is 6% to 24%.

[0056] Furthermore, since the air flow at the main air inlet 2021 is relatively rapid and mainly medium and high frequency noise, the smaller the aperture of the sound absorption holes and the higher the perforation rate, the better the medium and high frequency sound absorption effect. The first panel 301 mainly eliminates medium and low frequency noise. Therefore, the aperture of the first sound absorption holes 306 is generally less than or equal to the aperture of the second sound absorption holes 307, and the perforation rate of the air guide plate 303 is generally greater than or equal to the perforation rate of the first panel 301. For example, when the perforation rate of the air guide plate 303 is 20% and the aperture of the first sound absorption holes 306 is 1 mm, effective noise reduction can be achieved for the high frequency band noise of 1500 - 3000 Hz. When the perforation rate of the first panel 301 is 6% and the aperture of the second sound absorption holes 307 is 5 mm, effective noise reduction can be achieved for the medium and low frequency band noise of 300 - 1000 Hz.

[0057] In one embodiment, sound absorption layers (not shown in the figure) are respectively attached to the inner sides of the air guide plate 303 and / or the first panel 301. The sound absorption layers respectively cover a plurality of first sound absorption holes 306 and / or a plurality of second sound absorption holes 307. By providing sound absorption layers inside a plurality of first sound absorption holes 306 and / or a plurality of second sound absorption holes 307, the sound absorption layers can be used to absorb and attenuate noise, further improving the noise reduction effect and providing a better user experience.

[0058] Specifically, the sound absorption layers can be attached to the inner sides of the air guide plate 303 and / or the first panel 301 in advance with fixing glue, and then the first panel 301, the second panel 302, the air guide plate 303, the top mounting plate 305 and the side mounting plate 304 are spliced and installed as a whole.

[0059] It should be noted that the embodiments of the present application do not limit the material of the sound absorption layer, and any existing sound absorption material can be selected according to needs. For example, the sound absorption layer is sound absorption cotton, glass fiber sound absorption board, polyurethane foam board, etc., which have good moisture-proof and corrosion-resistant properties and are suitable for use in the kitchen environment.

[0060] In one embodiment, the thickness range of the first panel 301 and the air deflector 303 is from 0.4 mm to 1 mm. The acoustic resistance and reactance of the noise decrease as the thickness of the air deflector 303 decreases. The smaller the thickness of the air deflector 303, the better the sound absorption effect on medium and high frequency noise. Therefore, on the premise of ensuring the structural strength of the air deflector 303, the thickness of the air deflector 303 should be set smaller.

[0061] Furthermore, in one embodiment, since the air deflector 303 mainly eliminates high frequency noise and the first panel 301 mainly eliminates medium and low frequency noise. Therefore, the thickness of the air deflector 303 is generally less than or equal to the thickness of the first panel 301. For example, the thickness of the air deflector 303 is 0.4 mm and the thickness of the first panel 301 is 1 mm.

[0062] In one embodiment, the air deflector 303 extends from front to back towards the rear side of the air box body 201 and is inclined towards the direction where the main air inlet 2021 is located to change the radiation direction of the noise, which is beneficial to noise reduction. Specifically, as Figures 7 to 9 shown, the second sub-air deflector 3032 and the third sub-air deflector 3033 are inclined towards the inner side of the air box body 201 and the direction where the fan 202 is located.

[0063] In one embodiment, as Figures 2 to 4 shown, the top surface of the top surface mounting plate 305 is connected to the inner top of the air box body 201, the side mounting plate 304 is connected to the inner side surface of the air box body 201, the first panel 301 located on the inner side is in contact with the outer surface of the fan 202, and the second panel 302 located on the outer side is flush with the rear end surface of the air box body 201, so as to fix the flow guide member 3 at the corner of the air box body 201. At the same time, it can also prevent a gap from being generated between the flow guide member 3 and the inner side surface of the air box body 201, increasing the noise.

[0064] It should be noted that the embodiments of the present application do not limit the connection manner between the top surface mounting plate 305, the side mounting plate 304 and the air box body 201. It can adopt a fastening connection manner or a snap connection manner.

[0065] In one embodiment, as Figure 3As shown, mounting holes are respectively formed in the top and side portions of the bellows housing 201, and mounting holes are also respectively formed in the top mounting plate 305 and the side mounting plate 304. By passing fasteners through the mounting holes in the top of the top mounting plate 305 and the bellows housing 201 respectively, the top mounting plate 305 is fixed to the inner side of the top of the bellows housing 201. By passing fasteners through the mounting holes in the side of the side mounting plate 304 and the bellows housing 201 respectively, the side mounting plate 304 is fixed to the inner side surface of the bellows housing 201, and gaskets are provided at the fasteners and the mounting holes to prevent noise leakage. The fasteners can be conventional fasteners such as screws and bolts, and the mounting holes are correspondingly selected as threaded holes or round holes for easy disassembly and maintenance.

[0066] In addition, in order to facilitate the installation of the flow guide member 3, flanges are respectively formed by inward extension of the top and inner edges of the bellows housing 201, and the flanges are used to further fix and limit the flow guide member 3.

[0067] In some other embodiments, the top mounting plate 305 can also be adhesively bonded to the inner side of the top of the bellows housing 201 by fixing glue. Similarly, the side mounting plate 304 can also be adhesively bonded to the inner side surface of the bellows housing 201 by fixing glue, with firm connection and convenient installation.

[0068] In the specific content of the above specific embodiments, the technical features can be combined arbitrarily without contradiction. For the sake of concise description, not all possible combinations of the above technical features are described. However, as long as the combinations of these technical features do not exist in contradiction, they should all be considered as the scope described in this specification.

[0069] The specific content of the above specific embodiments only expresses several embodiments of the present invention, and its description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

1. A range hood with a flow guide, characterized in that: The invention comprises a smoke collecting chamber (1), a wind box (2) and a flow guide member (3) with a cavity formed therein, wherein the wind box (2) comprises a wind box body (201) arranged at the top of the smoke collecting chamber (1) and a fan (202) arranged in the wind box body (201), the rear end of the fan (202) forms a main air inlet (2021), the front end of the fan (202) forms a secondary air inlet (2022), the fan (202) is provided with an air outlet (2023) opening toward one side of the top of the wind box body (201), the flow guide member (3) is located in the wind box body (201) and is arranged at the rear of the main air inlet (2021). At a corner away from the air outlet (2023), the air guide member (3) is provided with an air guide plate (303) arranged at an angle to the plane where the main air inlet (2021) is located, and a plurality of first silencer holes (306) are spaced apart on the air guide plate (303); the top surface of the air guide member (3) is connected to the top wall of the bellows case (201); a side surface of the air guide member (3) away from the air outlet (2023) is connected to the side wall of the bellows case (201); the front side surface of the air guide member (3) is in contact with the fan (202); and the rear side surface of the air guide member (3) is in contact with the back plate of the bellows case (201).

2. A range hood with a flow guide according to claim 1, characterized in that: The air guide member (3) comprises a first panel (301) and a second panel (302) which surround the cavity and are arranged opposite to each other along the front-rear direction of the range hood, the air guide plate (303) arranged on the first panel (301) and the second panel (302) on the side facing the main air inlet (2021), a side mounting plate (304) arranged on the first panel (301) and the second panel (302) on the side away from the air guide plate (303), and a top mounting plate (305) arranged on the top of the first panel (301) and the second panel (302), and the air guide plate (303) is arranged on the outer edge of the main air inlet (2021).

3. A range hood with a flow guide according to claim 2, characterized in that: The air guide plate (303) comprises a sub-air guide plate or a plurality of sub-air guide plates connected in sequence at an angle, and at least part of the sub-air guide plates are inclined inward from top to bottom toward the direction of the cavity, so that the plurality of sub-air guide plates are compatible with the surface of the fan (202).

4. The range hood with a flow guide according to claim 2, characterized in that: A plurality of second sound-absorbing holes (307) are arranged at intervals on the first panel (301); The aperture of the first muffler hole (306) and / or the second muffler hole (307) ranges from 1 mm to 5 mm; The perforation rate of the first panel (301) and / or the air guide plate (303) ranges from 6% to 24%.

5. The range hood with a flow guide according to claim 4, characterized in that: The aperture of the first muffler hole (306) is smaller than or equal to the aperture of the second muffler hole (307), and the perforation rate of the air guide plate (303) is greater than or equal to the perforation rate of the first panel (301).

6. The range hood with a flow guide according to claim 4, characterized in that: A sound absorbing layer is attached to the inner side of the air guide plate (303) and / or the first panel (301), respectively, and the sound absorbing layer covers the plurality of first sound-absorbing holes (306) and / or the plurality of second sound-absorbing holes (307).

7. The range hood with a flow guide according to claim 6, characterized in that: The thickness of the first panel (301) and / or the wind guide plate (303) ranges from 0.4 mm to 1 mm.

8. The range hood with a flow guide according to claim 7, characterized in that: The thickness of the air guide plate (303) is less than or equal to the thickness of the first panel (301).

9. A range hood with a flow guide according to any one of claims 2 to 8, characterized in that: The air guide plate (303) extends from front to back toward the rear side of the bellows housing (201) and is inclined toward the direction of the main air inlet (2021).

10. A range hood with a flow guide according to any one of claims 2 to 8, characterized in that: The top surface of the top mounting plate (305) is connected to the inner side of the top of the bellows box body (201), the side mounting plate (304) is connected to the inner side of the bellows box body (201), the first panel (301) is in contact with the outer surface of the fan (202), and the second panel (302) is flush with the rear end surface of the bellows box body (201).

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