Range hood device

Abstract

The utility model belongs to the technical field of kitchen appliances, and discloses a range hood device which comprises a sound absorber arranged in a fan shell, the sound absorber can absorb noise and is provided with an extending flow guide face, a first flow guide face and a second flow guide face, and the first flow guide face and the second flow guide face are connected with each other and form an included angle. The first flow guide surface obliquely extends from the lower part of the fan to one side of the first air inlet, the second flow guide surface obliquely extends from the lower part of the fan to one side of the second air inlet, and the extending flow guide surface obliquely extends from the air outlet of the smoke collecting cavity to the outer side of a volute of the fan; the first flow guide face, the partial extending flow guide face and the fan shell define a first flow guide channel, the first flow guide channel communicates with the smoke collecting cavity and the first air inlet, the second flow guide face, the partial extending flow guide face and the fan shell define a second flow guide channel, and the second flow guide channel communicates with the smoke collecting cavity and the second air inlet. The range hood device disclosed by the utility model can effectively absorb the working noise of middle and low frequency bands and avoid the air volume loss caused by occupying an air duct at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, in particular to a smoke machine device. Background Art

[0002] As an important ventilation device for improving the air quality in the kitchen, the range hood is widely used. The noise problem generated by the range hood during ventilation has a great impact on the kitchen environment and user experience. The range hood uses a smoke collecting cavity to gather oil fumes, and generates a negative pressure suction through a fan in a non-closed flow channel. The oil fumes enter the flow channel and are discharged after being accelerated by the fan.

[0003] During the whole working process, the noise decibel radiated through the smoke collecting cavity is the highest. Some range hoods adopt sound-absorbing structures arranged before and after the fan to reduce the working noise of this part. In order to avoid occupying too much air flow channel, the sound-absorbing structure is usually thin-walled, otherwise it will cause the loss of the air volume of the range hood. The sound absorption and noise reduction performance of this thin-walled sound-absorbing structure is relatively limited, and it can only absorb the noise of some frequencies. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a smoke machine device, which can solve the problem that the existing range hood adopts a thin-walled sound-absorbing structure, resulting in relatively limited sound absorption and noise reduction performance and only being able to absorb the noise of some frequencies.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The smoke machine device includes a smoke machine main body, a fan housing and a fan. The smoke machine main body has a smoke collecting cavity, the fan housing has an air duct, the fan has a first air inlet and a second air inlet arranged on both sides, the fan is located in the air duct, the smoke collecting cavity is communicated with the air duct, and the smoke machine device further includes a sound absorber arranged in the fan housing. The sound absorber can absorb noise. The sound absorber has an extended guiding surface and a first guiding surface and a second guiding surface which are connected to each other and arranged at an angle. The first guiding surface extends obliquely from below the fan towards the first air inlet side, the second guiding surface extends obliquely from below the fan towards the second air inlet side, and the extended guiding surface extends obliquely from the air outlet of the smoke collecting cavity towards the outside of the fan volute;

[0007] Wherein, the first guiding surface, a part of the extended guiding surface and the fan housing enclose to form a first guiding channel, the first guiding channel communicates the smoke collecting cavity and the first air inlet, the second guiding surface, a part of the extended guiding surface and the fan housing enclose to form a second guiding channel, and the second guiding channel communicates the smoke collecting cavity and the second air inlet.

[0008] As an optional structure of the present utility model, the sound absorber includes a first sound absorption block and a second sound absorption block connected to each other. The first sound absorption block has a V-shaped guiding portion, and two side surfaces of the V-shaped guiding portion respectively form a first diversion surface and a second diversion surface. An extended diversion surface is arranged on the second sound absorption block. The first sound absorption block and the second sound absorption block are cross-connected so that the first diversion surface and the extended diversion surface are arranged at an angle, and the second diversion surface and the extended diversion surface are arranged at an angle.

[0009] As an optional structure of the present utility model, the first sound absorption block further includes a connecting portion, the connecting portion is connected above the V-shaped guiding portion, and the connecting portion has an arc-shaped connecting surface to cover at least a part of the outer side surface of the volute; and / or,

[0010] The first diversion surface and the second diversion surface are symmetrically arranged on both axial sides of the fan. A width of the V-shaped guiding portion is formed between the other end of the first diversion surface away from the intersection end and the other end of the second diversion surface away from the intersection end, and the width is equal to the axial thickness of the fan; and / or,

[0011] The tip of the V-shaped guiding portion faces the air outlet, and there is a distance between the tip and the air outlet.

[0012] As an optional structure of the present utility model, the axial direction of the fan extends along the left-right direction of the range hood main body, the length direction of the first sound absorption block extends along the front-back direction of the range hood main body, the length of the second sound absorption block extends along the left-right direction of the range hood main body, and the projection of the V-shaped guiding portion in the front-back direction is located on the extended diversion surface.

[0013] As an optional structure of the present utility model, the dimension of the fan housing in the front-back direction is larger than the dimension of the range hood main body in the front-back direction. The second sound absorption block is a trapezoidal block, one side waist surface of the trapezoidal block forms the extended diversion surface, the lower bottom surface of the trapezoidal block fits on the bottom of the fan housing, one end of the extended diversion surface extends to the air outlet, and the plane where the extended diversion surface is located does not intersect with the contour line of the first air inlet.

[0014] As an optional structure of the present utility model, the fan housing has a first inner cavity wall and a second inner cavity wall arranged oppositely in the front-back direction. The first sound absorption block has a first side end surface, and the other side waist surface of the trapezoidal block opposite to the extended diversion surface forms a second side end surface. The first side end surface can fit on the first inner cavity wall, and the second side end surface can fit on the second inner cavity wall.

[0015] As an optional structure of the present utility model, the sound absorber is provided with a through oil guiding channel. One end of the oil guiding channel communicates with the oil outlet of the fan housing, and the other end communicates with the smoke collecting cavity. The oil guiding channel is used to guide the grease in the fan housing into the smoke collecting cavity.

[0016] As an alternative structure of the present utility model, the oil guiding opening of the oil guiding channel is provided at the connection of the first guiding surface and the second guiding surface, and the oil guiding opening faces the extending guiding surface, and the extending guiding surface can guide the grease into the smoke collecting cavity.

[0017] As an alternative structure of the present utility model, the range hood device further includes a guiding cover plate, which is detachably connected to the fan housing, and the guiding cover plate is used to support the sound absorbing body.

[0018] As an alternative structure of the present utility model, the guiding cover plate at least covers the first guiding surface, the second guiding surface and the extending guiding surface; and / or,

[0019] At least some areas of the guiding cover plate are provided with noise reduction holes.

[0020] Advantages of the present utility model:

[0021] The range hood device provided by the present utility model has a sound absorbing body with an extending guiding surface and a first guiding surface and a second guiding surface that are connected to each other and arranged at an angle. The first guiding surface extends obliquely from below the fan towards the first air inlet side, the second guiding surface extends obliquely from below the fan towards the second air inlet side, and the extending guiding surface extends obliquely from the air outlet of the smoke collecting cavity towards the outside of the volute of the fan. Among them, the first guiding surface, a part of the extending guiding surface and the fan housing enclose a first guiding channel, the first guiding channel communicates with the smoke collecting cavity and the first air inlet, the second guiding surface, a part of the extending guiding surface and the fan housing enclose a second guiding channel, and the second guiding channel communicates with the smoke collecting cavity and the second air inlet. As a three-dimensional structure with an extending guiding surface and a first guiding surface and a second guiding surface arranged at an angle, the sound absorbing body has a certain thickness and can better absorb the working noise in the medium and low frequency bands, greatly reducing the noise decibels diffused through the smoke collecting cavity. Moreover, the first guiding surface and the second guiding surface arranged at an angle form a V-shaped structure, reducing the resistance of the oil fume flowing from the air outlet to the air duct. At the same time, under the action of the obliquely arranged extending guiding surface, the first guiding channel and the second guiding channel form a gradually expanding channel. The first guiding channel and the second guiding channel guide the oil fume flowing out of the air outlet, enabling the oil fume airflow to transition smoothly, avoiding the eddy current caused by the sudden change of the cross section when the oil fume enters the air duct from the smoke collecting cavity, reducing the eddy current noise, and the gradually expanding flow channel will not occupy too much effective space in the air duct, avoiding the loss of air volume. Description of the Drawings

[0022] Figure 1 It is a side view of the internal structure of the range hood device provided by the embodiment of the present utility model;

[0023] Figure 2 It is a partial structural schematic diagram of the range hood device provided by the embodiment of the present utility model;

[0024] Figure 3It is a partial structural disassembly schematic diagram of the smoke machine device provided by an embodiment of the present utility model;

[0025] Figure 4 It is a flow guiding schematic diagram of the sound absorber provided by an embodiment of the present utility model;

[0026] Figure 5 It is a structural schematic diagram of the sound absorber provided by an embodiment of the present utility model.

[0027] In the figure:

[0028] 1. Smoke machine main body; 11. Smoke collecting cavity; 111. Air outlet;

[0029] 2. Fan housing; 21. Air duct; 22. First inner cavity wall; 23. Second inner cavity wall;

[0030] 3. Fan; 31. First air inlet; 32. Second air inlet; 33. Volute;

[0031] 4. Sound absorber; 401. First flow guiding channel; 402. Second flow guiding channel; 41. Extended flow guiding surface; 42. First flow guiding surface; 43. Second flow guiding surface; 44. First sound absorption block; 441. V-shaped guiding part; 442. Connecting part; 4421. Arc-shaped connecting surface; 443. First side end face; 45. Second sound absorption block; 451. Second side end face; 46. Oil guiding channel; 461. Oil guiding port;

[0032] 5. Flow guiding cover plate; 51. Noise reduction hole; 52. V-shaped cover plate; 521. Oil leakage hole; 53. Inclined cover plate. Detailed implementation manners

[0033] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the sake of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0034] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0035] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0036] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "left" and "right" are based on the orientation or positional relationships shown in the drawings. They are only for the convenience of description and simplifying the operation, 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. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0037] As an important ventilation device for improving the air quality in the kitchen, the range hood is widely used. The noise problem generated by the range hood during the ventilation process has a greater impact on the kitchen environment and the user experience. The range hood uses a smoke collecting cavity to gather oil fumes, and generates a negative pressure suction through a fan in a non-closed flow channel. The oil fumes enter the flow channel and are discharged after being accelerated by the fan. During the whole working process, the noise decibel radiated through the smoke collecting cavity is the highest. Some range hoods adopt sound-absorbing structures arranged before and after the fan to reduce the working noise in this part. The sound-absorbing structure is usually thin-walled and cannot occupy too much air flow channel, otherwise it will cause the loss of the air volume of the range hood. The sound absorption and noise reduction performance of this thin-walled sound-absorbing structure is relatively limited, and it can only absorb the noise of some frequencies. To solve the above problems, the embodiments of the present utility model provide a range hood device.

[0038] The inventor found through long-term research that by performing a spectrum analysis on the working noise generated during the use of the range hood, the proportion of the medium and low frequency noise within 1000 Hz is the largest, and the sound waves of the medium and low frequency noise are longer, which are more likely to pass through the sound absorption and isolation structure and the housing of the range hood and affect the surrounding environment. The main sound absorption frequency band of the thin-walled sound-absorbing structure is in the medium and high frequency part, and its sound absorption effect in the low frequency range is not ideal, because the thickness of the sound-absorbing structure is the key influencing factor for the sound absorption performance. For example, for porous sound-absorbing materials, its first resonance frequency is inversely proportional to the thickness. Appropriately increasing the thickness of the sound-absorbing structure can greatly improve the sound absorption performance of the sound-absorbing structure in the medium and low frequency bands. Therefore, this porous sound-absorbing material with a certain thickness can be applied to the range hood device of this embodiment to effectively absorb the working noise in the medium and low frequency bands.

[0039] As Figures 1 to 3 shown, the range hood device includes a range hood main body 1, a blower housing 2 and a blower 3. A smoke collecting cavity 11 is provided in the range hood main body 1, and the smoke collecting cavity 11 is used for collecting the oil fume generated during cooking. A wind channel 21 is provided in the blower housing 2. The blower 3 is an axial flow blower, and has a first air inlet 31 and a second air inlet 32 provided on both sides. The blower 3 is located in the wind channel 21, and the smoke collecting cavity 11 is communicated with the wind channel 21. Under the action of the blower 3, the oil fume enters the wind channel 21 from the smoke collecting cavity 11.

[0040] The range hood device further includes a sound absorber 4 provided in the blower housing 2. The sound absorber 4 is made of porous sound absorbing material, and the sound absorber 4 can absorb noise. The specific material of the sound absorber 4 is not limited in this embodiment. The sound absorber 4 has an extended guiding surface 41, and a first guiding surface 42 and a second guiding surface 43 which are connected to each other and arranged at an angle. The first guiding surface 42 extends obliquely from below the blower 3 towards the first air inlet 31, the second guiding surface 43 extends obliquely from below the blower 3 towards the second air inlet 32, and the extended guiding surface 41 extends obliquely from the air outlet 111 of the smoke collecting cavity 11 towards the outside of the volute 33 of the blower 3. Among them, the first guiding surface 42, a part of the extended guiding surface 41 and the blower housing 2 enclose to form a first guiding channel 401, and the first guiding channel 401 communicates the smoke collecting cavity 11 and the first air inlet 31. The second guiding surface 43, a part of the extended guiding surface 41 and the blower housing 2 enclose to form a second guiding channel 402, and the second guiding channel 402 communicates the smoke collecting cavity 11 and the second air inlet 32, as Figure 3 and Figure 4 shown, Figure 4 The arrows in the figure indicate the flow direction of the oil fume in the first guiding channel 401 and the second guiding channel 402.

[0041] As a three-dimensional space structure with an extended guiding surface 41 and a first guiding surface 42 and a second guiding surface 43 arranged at an angle, the sound absorber 4 has a certain thickness and can preferably absorb the working noise in the medium and low frequency bands, greatly reducing the noise decibels diffused through the smoke collecting cavity 11. Moreover, the first guiding surface 42 and the second guiding surface 43 arranged at an angle form a V-shaped structure, reducing the resistance of the oil fume flowing from the air outlet 111 into the wind channel 21. At the same time, under the action of the obliquely arranged extended guiding surface 41, the first guiding channel 401 and the second guiding channel 402 form a gradually expanding channel. The first guiding channel 401 and the second guiding channel 402 guide the oil fume flowing out of the air outlet 111, enabling the oil fume airflow to have a smooth transition, avoiding the eddy current caused by the sudden change of the cross section when the oil fume enters the wind channel 21 from the smoke collecting cavity 11, reducing the eddy current noise, and the gradually expanding flow channel does not waste the effective space in the wind channel 21, avoiding the loss of air volume.

[0042] As Figure 1As shown in the figure, D1 in the figure is the size of the air outlet 111, D2 is the size of the first diversion channel 401, D2 > D1, and moreover, as the first diversion channel 401 extends towards the first air inlet 31, the value of D2 gradually increases.

[0043] Specifically, the sound-absorbing body 4 includes a first sound-absorbing block 44 and a second sound-absorbing block 45 connected to each other. The first sound-absorbing block 44 has a V-shaped guiding portion 441, and two side surfaces of the V-shaped guiding portion 441 respectively form a first diversion surface 42 and a second diversion surface 43. The extended diversion surface 41 is arranged on the second sound-absorbing block 45. The first sound-absorbing block 44 and the second sound-absorbing block 45 are cross-connected to form an irregular three-dimensional space structure, as Figure 5 shown. The first diversion surface 42 and the extended diversion surface 41 are arranged at an angle, so that they can jointly enclose the first diversion channel 401 with the fan housing 2, and the second diversion surface 43 and the extended diversion surface 41 are arranged at an angle, so that they can jointly enclose the second diversion channel 402 with the fan housing 2.

[0044] In order to increase the diversion and noise reduction performance of the sound-absorbing body 4, the first sound-absorbing block 44 further includes a connecting portion 442. The connecting portion 442 is connected above the V-shaped guiding portion 441. The connecting portion 442 has an arc-shaped connecting surface 4421 to cover at least a part of the outer side surface of the volute 33. The connecting portion 442 eliminates the gap between the lower part of the fan 3 and the V-shaped guiding portion 441. On the one hand, it increases the volume of the sound-absorbing body 4 to improve the sound absorption and noise reduction performance. On the other hand, the side surfaces on both sides of the connecting portion 442 can also extend the lengths of the first diversion channel 401 and the second diversion channel 402 respectively, further improving the diversion performance to reduce the air volume loss.

[0045] The first diversion surface 42 and the second diversion surface 43 are symmetrically arranged on both axial sides of the fan 3. The width of the V-shaped guiding portion 441 is formed between the other end of the first diversion surface 42 away from the intersection end and the other end of the second diversion surface 43 away from the intersection end. The maximum width of the V-shaped guiding portion 441 is equal to the axial thickness of the fan 3. As Figure 3 shown in the figure, D5 in the figure is the axial thickness of the fan 3; Figure 5 in the figure, the maximum width of the V-shaped guiding portion 441 is L5, and L5 is equal to D5. The width of the connecting portion 442 is equal to the maximum width of the V-shaped guiding portion 441, so that the overall smoothness of the first diversion channel 401 and the second diversion channel 402 is better. There is no protrusion in the channel, and the flow resistance to the oil fume is the smallest.

[0046] The tip of the V-shaped guiding portion 441 faces the air outlet 111, and there is a distance between the tip and the air outlet 111, so as to avoid the V-shaped guiding portion 441 forming an obstruction at the air outlet 111. The oil fume flows a certain distance from the air outlet 111 and then is respectively diverted and guided by the V-shaped guiding portion 441 and enters the first air inlet 31 and the second air inlet 32.Figure 1 As shown in the figure, the distance H1 in the figure is the distance between the tip of the V-shaped guiding part 441 and the air outlet 111.

[0047] For the sake of convenience of description, the directions are indicated by arrows in the appended Figure 1 and Figure 2 figure. Among them, the X direction is the front-back direction of the range hood main body 1, and the Y direction is the left-right direction of the range hood main body 1. In an embodiment, the axial direction of the fan 3 extends along the left-right direction of the range hood main body 1, and the fan 3 is arranged at the middle position of the fan housing 2 along the left-right direction. The sound-absorbing body 4 is located between the fan 3 and the air outlet 111. The length direction of the first sound-absorbing block 44 extends along the front-back direction of the range hood main body 1, and the length of the second sound-absorbing block 45 extends along the left-right direction of the range hood main body 1. The V-shaped guiding part 441 is horizontally extended and arranged, and its projection along the front-back direction is located on the extended guiding surface 41. As Figure 5 shown in the figure, L5 in the figure is the maximum dimension of the V-shaped guiding part 441 along the left-right direction, L1 is the dimension of the second sound-absorbing block 45 along the left-right direction, and L5 is less than L1, ensuring that the projection of the V-shaped guiding part 441 along the front-back direction is located on the extended guiding surface 41. The extended guiding surface 41 can form a first guiding channel 401 with the first guiding surface 42 on one side of the V-shaped guiding part 441, and form a second guiding channel 402 with the second guiding surface 43 on the other side of the V-shaped guiding part 441.

[0048] In order to adapt to the arrangement mode of the fan 3, the dimension of the fan housing 2 in the front-back direction is larger than the dimension of the range hood main body 1 in the front-back direction. The second sound-absorbing block 45 is a trapezoidal block, and one side waist surface of the trapezoidal block forms the extended guiding surface 41. The lower bottom surface of the trapezoidal block is attached to the bottom of the fan housing 2. In this way, the second sound-absorbing block 45 fills part of the space of the fan housing 2, and one end of the extended guiding surface 41 extends to the air outlet 111, facilitating the guiding of the oil fume at the air outlet 111 and avoiding the influence of the sudden change in the dimensions of the fan housing 2 and the range hood main body 1 at the air outlet 111 on the oil fume. As Figure 5 shown in the figure, L3 in the figure is the dimension of the upper bottom surface of the trapezoidal block, L2 is the dimension of the lower bottom surface of the trapezoidal block, and L3 < L2.

[0049] The plane where the extended guiding surface 41 is located does not intersect with the contour line of the first air inlet 31. In this way, the oil fume in the first guiding channel 401 can all enter the first air inlet 31, and the oil fume in the second guiding channel 402 can all enter the second air inlet 32, avoiding the accumulation of oil fume in the fan housing 2. As Figure 1 shown in the figure, the dotted line S in the figure is the plane where the extended guiding surface 41 is located, D4 is the diameter dimension of the first air inlet 31, and the plane where the extended guiding surface 41 is located is outside the first air inlet 31.

[0050] The fan housing 2 has a first inner cavity wall 22 and a second inner cavity wall 23 arranged oppositely in the front-rear direction. In order to increase the thickness of the sound absorber 4 as much as possible in the front-rear direction, the first sound absorption block 44 has a first side end face 443, and the other waist face of the trapezoidal block extending oppositely to the diversion surface 41 forms a second side end face 451. The first side end face 443 can be attached to the first inner cavity wall 22, and the second side end face 451 can be attached to the second inner cavity wall 23. When the central angle of the arc connecting surface 4421 is relatively large, the first side end face 443 and the second side end face 451 can also extend to both sides of the connecting portion 442. As Figure 1 shown in the figure, D3 in the figure is the dimension of the fan housing 2 in the front-rear direction, Figure 5 in which L4 is the dimension of the sound absorber 4 in the front-rear direction. When L4 is equal to D3, the first side end face 443 is attached to the first inner cavity wall 22, and the second side end face 451 is attached to the second inner cavity wall 23; of course, in other embodiments, in order to facilitate the installation of the sound absorber 4, L4 can be made smaller than D3, and only the first side end face 443 needs to be attached to the first inner cavity wall 22.

[0051] In order to guide the accumulated grease in the fan housing 2, the sound absorber 4 is provided with a through oil guiding channel 46. One end of the oil guiding channel 46 communicates with the oil outlet of the fan housing 2, and the other end communicates with the smoke collecting cavity 11. The oil guiding channel 46 is used to guide the grease in the fan housing 2 into the smoke collecting cavity 11.

[0052] In an embodiment, the dimension of the air outlet 111 in the front-rear direction is less than half of the dimension of the fan housing 2 in the front-rear direction. Since the oil outlet is usually located directly below the fan housing 2, the oil guiding port 461 at the end of the oil guiding channel 46 is opened at the connection of the first diversion surface 42 and the second diversion surface 43. Moreover, the oil guiding port 461 faces the extending diversion surface 41, and the grease dripping from the oil guiding port 461 can flow along the extending diversion surface 41 and enter the smoke collecting cavity 11, and is received by an oil cup (not shown in the figure) in the smoke collecting cavity 11.

[0053] In order to facilitate the fixed installation of the sound absorber 4, the range hood device further includes a diversion cover plate 5. The diversion cover plate 5 is detachably connected to the fan housing 2, and the diversion cover plate 5 is used to support the sound absorber 4.

[0054] The diversion cover plate 5 covers at least the first diversion surface 42, the second diversion surface 43 and the extending diversion surface 41 to attach Figure 3For example, in one embodiment, the diversion cover plate 5 includes a V-shaped cover plate 52 and an inclined cover plate 53. The inclined cover plate 53 fits and extends along the diversion surface 41, and the V-shaped cover plate 52 fits the first diversion surface 42 and the second diversion surface 43. One end of the V-shaped cover plate 52 is closed, and the other end is open to connect to the inclined cover plate 53. Correspondingly, the inclined cover plate 53 has a notch such that the first sound absorption block 44 can pass through the notch to connect to the second sound absorption block 45. Moreover, the V-shaped cover plate 52 is provided with an oil leakage hole 521 to communicate with the oil guiding port 461. This upward support of the diversion cover plate 5 can prevent the sound absorber 4 from moving within the air duct 21.

[0055] In order to improve the sound absorption and noise reduction ability of the diversion cover plate 5, at least some areas of the diversion cover plate 5 are provided with noise reduction holes 51. For example, a plurality of spaced noise reduction holes 51 can be provided on the V-shaped cover plate 52, or a plurality of spaced noise reduction holes 51 can be provided on the inclined cover plate 53, or a plurality of spaced noise reduction holes 51 are provided on both the V-shaped cover plate 52 and the inclined cover plate 53. It should be noted that when the inclined cover plate 53 is provided with noise reduction holes 51, the position of the noise reduction holes 51 needs to avoid a corresponding partial area below the oil guiding port 461 to prevent the dripping grease from entering the absorption holes of the sound absorber 4 through the noise reduction holes 51.

[0056] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A range hood device, comprising a range hood body (1), a fan housing (2) and a fan (3), wherein the range hood body (1) has a smoke collecting chamber (11), the fan housing (2) has an air duct (21), the fan (3) has a first air inlet (31) and a second air inlet (32) arranged on both sides, the fan (3) is located in the air duct (21), the smoke collecting chamber (11) and the air duct (21) are connected, and characterized in that: The smoke exhaust device further comprises a sound absorbing body (4) arranged in the fan housing (2), the sound absorbing body (4) being capable of absorbing noise, the sound absorbing body (4) comprising an extended flow guide surface (41) and a first flow guide surface (42) and a second flow guide surface (43) which are connected to each other and arranged at an angle, the first flow guide surface (42) extending obliquely from the bottom of the fan (3) toward the first air inlet (31), the second flow guide surface (43) extending obliquely from the bottom of the fan (3) toward the second air inlet (32), and the extended flow guide surface (41) extending obliquely from the air outlet (111) of the smoke collecting chamber (11) toward the outer side of the volute (33) of the fan (3); The first guide surface (42), part of the extended guide surface (41) and the fan housing (2) are arranged to form a first guide channel (401), and the first guide channel (401) is connected to the smoke collecting chamber (11) and the first air inlet (31); the second guide surface (43), part of the extended guide surface (41) and the fan housing (2) are arranged to form a second guide channel (402), and the second guide channel (402) is connected to the smoke collecting chamber (11) and the second air inlet (32).

2. The range hood device according to claim 1, characterized in that: The sound absorbing body (4) comprises a first sound absorbing block (44) and a second sound absorbing block (45) which are connected to each other. The first sound absorbing block (44) has a V-shaped guide portion (441). Two side surfaces of the V-shaped guide portion (441) respectively form the first flow guide surface (42) and the second flow guide surface (43). The extended flow guide surface (41) is arranged on the second sound absorbing block (45). The first sound absorbing block (44) and the second sound absorbing block (45) are cross-connected so that the first flow guide surface (42) and the extended flow guide surface (41) are arranged at an angle, and the second flow guide surface (43) and the extended flow guide surface (41) are arranged at an angle.

3. The range hood device according to claim 2, characterized in that: The first sound absorbing block (44) further comprises a connecting portion (442), wherein the connecting portion (442) is connected to the upper portion of the V-shaped guide portion (441), and the connecting portion (442) has an arc-shaped connecting surface (4421) for covering at least a portion of the outer side surface of the volute (33); and / or, The first guide surface (42) and the second guide surface (43) are symmetrically arranged on both sides of the axial direction of the fan (3), and the width of the V-shaped guide portion (441) formed between the other end of the first guide surface (42) away from the intersection end and the other end of the second guide surface (43) away from the intersection end is equal to the axial thickness of the fan (3); and / or, The tip of the V-shaped guide portion (441) faces the air outlet (111), and there is a distance between the tip and the air outlet (111).

4. The range hood device according to claim 2, characterized in that: The axial direction of the fan (3) extends along the left-right direction of the range hood body (1), the length direction of the first sound absorbing block (44) extends along the front-back direction of the range hood body (1), the length of the second sound absorbing block (45) extends along the left-right direction of the range hood body (1), and the projection of the V-shaped guide portion (441) along the front-back direction is located on the extended guide surface (41).

5. The range hood device according to claim 4, characterized in that: The dimension of the fan housing (2) in the front-to-back direction is greater than the dimension of the range hood body (1) in the front-to-back direction; the second sound absorbing block (45) is a trapezoidal block; a side waist surface of the trapezoidal block forms the extended guide surface (41); the lower bottom surface of the trapezoidal block is attached to the bottom of the fan housing (2); one end of the extended guide surface (41) extends to the air outlet (111); and the plane where the extended guide surface (41) is located does not intersect with the contour line of the first air inlet (31).

6. The range hood device according to claim 5, characterized in that: The fan housing (2) has a first inner cavity wall (22) and a second inner cavity wall (23) arranged opposite to each other along the front-to-back direction; the first sound absorbing block (44) has a first side end surface (443); a second side end surface (451) is formed on the other side waist surface of the trapezoidal block relative to the extended guide surface (41); the first side end surface (443) can fit the first inner cavity wall (22); and the second side end surface (451) can fit the second inner cavity wall (23).

7. The range hood device according to any one of claims 1 to 6, characterized in that: The sound absorbing body (4) is provided with a through oil guide channel (46), one end of the oil guide channel is connected to the oil outlet of the fan housing (2), and the other end is connected to the smoke collecting chamber (11), and the oil guide channel is used to guide the grease in the fan housing (2) to flow into the smoke collecting chamber (11).

8. The range hood device according to claim 7, characterized in that: The oil guide port (461) of the oil guide channel is provided at the connection between the first guide surface (42) and the second guide surface (43), and the oil guide port (461) faces the extended guide surface (41), and the extended guide surface (41) is capable of guiding the grease into the smoke collecting chamber (11).

9. The range hood device according to any one of claims 1 to 6, characterized in that: The range hood device further comprises a flow guide cover plate (5), wherein the flow guide cover plate (5) is detachably connected to the fan housing (2), and the flow guide cover plate (5) is used to support the sound absorber (4).

10. The range hood device according to claim 9, characterized in that: The guide cover plate (5) at least covers the first guide surface (42), the second guide surface (43) and the extended guide surface (41); and / or, At least a portion of the guide cover plate (5) is provided with noise reduction holes (51).

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