Range hood

Abstract

The utility model discloses a range hood, and relates to the technical field of range hoods, the range hood comprises a casing, a fan assembly and at least two flow guide parts arranged in an inner cavity, the casing is provided with the inner cavity, and a smoke inlet and a smoke outlet which are communicated with the inner cavity; the fan assembly comprises a fan shell arranged in the inner cavity, the fan shell is provided with an air inlet and an air outlet which are communicated with each other, and the air outlet is communicated with the smoke outlet; the at least two flow guide parts are arranged on the two opposite sides of the air inlet respectively, the side, close to the air inlet, of each flow guide part is provided with a guide face, and a smoke guide channel communicating with the air inlet and the smoke inlet is defined between the guide faces of the two flow guide parts. The width of the smoke guide channel is gradually reduced in the direction close to the fan shell. According to the technical scheme, the probability that vortex is generated in the inner cavity of the exhaust fume collecting hood can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, and particularly relates to a range hood. Background Art

[0002] A range hood usually includes a smoke collecting hood and a fan assembly. Usually, two air inlets are arranged along the left - right direction in the front of the smoke collecting hood, and the fan assembly is usually centrally arranged in the inner cavity of the smoke collecting hood so that the negative pressure intensities generated at the two air inlets are basically the same. In the related art, the cross - sectional shape of the inner cavity of the smoke collecting hood in the cross - sectional plane perpendicular to the axis of the fan assembly is usually rectangular, which causes the oil fume flowing in the smoke collecting hood to easily generate vortex phenomena. In particular, vortex and the resulting aerodynamic noise are more likely to occur at the corners of the inner cavity of the smoke collecting hood. Summary of the Utility Model

[0003] The main purpose of the utility model is to propose a range hood, aiming to reduce the probability of generating vortex in the inner cavity of the smoke collecting hood.

[0004] To achieve the above object, the range hood proposed by the utility model includes:

[0005] A housing having an inner cavity, an air inlet and an air outlet communicating with the inner cavity;

[0006] A fan assembly including a fan housing disposed in the inner cavity, the fan housing having a communicating air inlet and air outlet, and the air outlet communicating with the air outlet; and

[0007] At least two flow - guiding members disposed in the inner cavity, the at least two flow - guiding members being respectively disposed on opposite sides of the air inlet. The flow - guiding member has a guiding surface on the side close to the air inlet, and a smoke - guiding channel communicating the air inlet and the air inlet is defined between the guiding surfaces of the two flow - guiding members. The width of the smoke - guiding channel is gradually reduced in the direction close to the fan housing.

[0008] In one embodiment, the flow - guiding member is configured as an arc - shaped plate protruding away from the air inlet.

[0009] In one embodiment, the flow - guiding member has at least two intersecting guiding surfaces.

[0010] In one embodiment, the flow - guiding member is sequentially provided with a first guiding surface and a second guiding surface from top to bottom. The inclination angle of the second guiding surface is greater than that of the first guiding surface, and the included angle between the first guiding surface and the second guiding surface is greater than 90°.

[0011] In one embodiment, the intersection line of the two guiding surfaces at the lowermost end is located on the side of the outer edge of the air inlet away from the air inlet.

[0012] In one embodiment, the lower edge of the lowermost guiding surface is located outside the outer edge of the smoke inlet and above the upper edge of the smoke inlet.

[0013] In one embodiment, the guiding member is successively distributed with a first guiding surface, a second guiding surface and a third guiding surface from top to bottom, and the first guiding surface and the second guiding surface extend obliquely upward in a direction close to the air inlet.

[0014] In one embodiment, the included angle γ between the third guiding surface and the second guiding surface is greater than 90°.

[0015] In one embodiment, the included angle β between the third guiding surface and the first guiding surface ranges from 120° to 160°.

[0016] In one embodiment, the included angle θ between the second guiding surface and the first guiding surface ranges from 10° ≤ θ - β ≤ 30°.

[0017] In one embodiment, the included angle γ between the third guiding surface and the second guiding surface ranges from 10° ≤ γ - β ≤ 30°.

[0018] In one embodiment, the inner cavity includes a connected collection cavity and an extension cavity, the cross-sectional area of the collection cavity is larger than that of the extension cavity, the smoke inlet, the collection cavity, the extension cavity and the smoke outlet are sequentially connected, and at least part of the fan housing is arranged in the extension cavity.

[0019] In one embodiment, at least part of the air inlet extends into the collection cavity, the guiding surface includes a first guiding surface, the first guiding surface is arranged at one end of the guiding member close to the air inlet, and extends obliquely upward in a direction close to the air inlet, and the inclination angle of the first guiding surface is configured to be 10° to 45°.

[0020] In one embodiment, the inclination angle α of the first guiding surface ranges from 15° to 25°.

[0021] In one embodiment, the housing includes a top plate having a communication hole, the collection cavity and the extension cavity are connected through the communication hole, the guiding member is arranged between the smoke inlet and the top plate, and at least part of the orthographic projection area of the guiding member facing the plane where the top plate is located overlaps with the orthographic projection area of the smoke inlet facing the plane where the top plate is located.

[0022] In one embodiment, the range hood further includes an oil guide plate arranged at the edge of the communication hole, and the oil guide plate is used to guide the oil flowing out of the extension cavity to the bottom of the collection cavity.

[0023] In one embodiment, the flow guide is disposed on a side of the oil guide plate away from the air inlet, and an upper edge of the flow guide is connected to the oil guide plate, and a lower edge of the flow guide is located outside an outer edge of the smoke inlet.

[0024] In one embodiment, the flow guide is connected to an upper edge of the oil guide plate, and the oil guide plate is provided with an air passing through hole corresponding to the guiding surface.

[0025] In one embodiment, a first flanging is provided on an upper edge of the flow guide, and the first flanging is locked to the oil guide plate by screws.

[0026] In one embodiment, a second flanging is provided at a lower end of the flow guide, and the second flanging is locked to a rear cavity wall of the collection cavity by screws.

[0027] In one embodiment, the flow guide is provided with a wire harness buckle for clamping a wire harness.

[0028] The technical solution of the present utility model promotes some or all of the oil fume to directly flow to the air inlet through a smoke guide channel with a gradually decreasing width defined by two guiding surfaces, which can reduce the generation of eddy currents of the oil fume in the inner cavity of the smoke collecting hood, especially the probability of generating eddy currents at the corners of the inner cavity, thereby being able to improve the problem of oil fume eddy currents in the inner cavity of the smoke collecting hood and the resulting aerodynamic noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model, and for those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0030] Figure 1 is a schematic structural diagram of a first embodiment of a range hood provided by the present utility model;

[0031] Figure 2 is Figure 1 a front view of the shown embodiment;

[0032] Figure 3 is Figure 1 an internal structural diagram of the shown embodiment;

[0033] Figure 4 is Figure 3 a front view of the shown structure;

[0034] Figure 5 is Figure 3 a schematic structural diagram of the flow guide in;

[0035] Figure 6 The front view of the deflector shown Figure 5 in FIG. 4

[0036] Figure 7 The front view of the internal structure of the second embodiment of the range hood provided by the present utility model

[0037] Figure 8 is Figure 7 the schematic structural view of the middle deflector

[0038] Figure 9 is Figure 8 the front view of the deflector shown

[0039] Figure 10 is Figure 2 the cross-sectional view taken along line A-A in FIG. 9

[0040] Explanation of the reference numerals in the drawings

[0041] 10. Cabinet; 11. Inner cavity; 111. Collection cavity; 112. Extension cavity; 12. Smoke inlet; 13. Smoke outlet; 14. Top plate; 141. Communication hole; 15. Oil cup

[0042] 20. Fan assembly; 21. Fan housing; 211. Air inlet

[0043] 30. Deflector; 301. Guide surface; 302. Smoke guide channel; 31. First guide surface; 32. Second guide surface; 33. Third guide surface; 341. Wiring harness buckle; 342. Drawing hole; 35. First flanging; 36. Second flanging

[0044] 40. Oil guide plate; 41. Oil guide flanging; 42. Air passing through hole

[0045] The realization, functional features and advantages of the object of the present utility model will be further described with reference to the embodiments and the accompanying drawings Specific embodiments

[0046] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model

[0047] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, then such directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a certain specific posture. If this specific posture changes, then the directional indications will also change accordingly.

[0048] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, then such descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their 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 at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0049] A range hood generally includes a smoke collecting hood and a fan assembly. Two air inlets are usually arranged along the left - right direction in the front of the smoke collecting hood, and the fan assembly is usually centrally arranged in the inner cavity of the smoke collecting hood so that the negative pressure intensities generated at the two air inlets are basically the same. In the related art, the cross - sectional shape of the inner cavity of the smoke collecting hood in the cross - sectional plane perpendicular to the axis of the fan assembly is usually rectangular, which causes the oil fume flowing in the smoke collecting hood to easily generate vortex phenomena. In particular, vortexes and the resulting aerodynamic noise are more likely to occur at the corners of the inner cavity of the smoke collecting hood.

[0050] In view of this, the present utility model proposes a range hood, aiming to improve the problems of oil fume vortex in the inner cavity of the smoke collecting hood and the resulting aerodynamic noise.

[0051] Please refer to Figure 1 , in an embodiment of the present utility model, the range hood includes a housing 10 and a fan assembly 20. The housing 10 has an inner cavity 11, and an air inlet 12 and an air outlet 13 communicating with the inner cavity 11; the fan assembly 20 includes a fan housing 21 arranged in the inner cavity 11, an impeller (not shown in the drawings) rotatably arranged in the fan housing 21, and a driving member (not shown in the drawings) drivingly connected to the impeller. The fan housing 21 has a communicating air inlet 211 and an air outlet (not shown in the drawings), and the air outlet is communicated with the air outlet 13.

[0052] Specifically, when the fan assembly 20 is operating, air within the inner cavity 11 of the housing 10 can be exhausted through the smoke exhaust port, thereby creating a negative pressure region between the inner cavity 11 and the smoke inlet 12, and causing the cooking fumes outside the smoke inlet 12 to be inhaled into the inner cavity 11 and exhausted through the smoke exhaust port.

[0053] Among them, the housing 10 can be, but is not limited to, made of metal or plastic. Exemplarily, the housing 10 can be made of metal to enhance the structural strength of the housing 10, thereby extending the service life of the range hood. Exemplarily, two smoke inlets 12 are distributed in the left - right direction on the housing 10, and both of the two smoke inlets 12 communicate with the inner cavity 11, so as to be applicable to cooktops with multiple burners and improve the suction efficiency and effect of cooking fumes. Exemplarily, the fan assembly 20 is configured as a centrifugal fan, the fan housing 21 is correspondingly configured as a volute, and the impeller is correspondingly configured as a centrifugal impeller.

[0054] Furthermore, the inner cavity 11 includes a connected collection cavity 111 (also known as a smoke collection hood) and an extension cavity 112 (also known as a fan hood). The cross - sectional area of the collection cavity 111 is larger than that of the extension cavity 112. The smoke inlet 12, the collection cavity 111, the extension cavity 112, and the smoke outlet 13 are connected in sequence, and at least part of the fan housing 21 is disposed in the extension cavity 112. In this way, setting part or all of the fan housing 21 in the extension cavity 112 is beneficial to reducing the thickness dimension of the collection cavity 111 in the front - rear direction and realizing the thin - type design of the range hood. Of course, in other embodiments, the inner cavity 11 can also be set in other structural forms. For example, only the collection cavity 111 is provided without the extension cavity 112, and in this case, the fan housing 21 is disposed in the collection cavity 111.

[0055] Specifically and optionally, the housing 10 includes a top plate 14 having a communication hole 141. The collection cavity 111 and the extension cavity 112 are connected through the communication hole 141. The collection cavity 111 is located below the top plate 14, the extension cavity 112 is located above the top plate 14, the smoke inlet 12 is provided in front of the collection cavity 111, and the smoke outlet 13 is provided on the top surface of the extension cavity 112.

[0056] Furthermore, the range hood includes at least two flow - guiding members 30 disposed in the inner cavity 11. The two flow - guiding members 30 are separately disposed on opposite sides of the air inlet 211, and have a guiding surface 301 on the side close to the air inlet 211. A smoke - guiding channel 302 connecting the air inlet 211 and the smoke inlet 12 is defined between the two guiding surfaces 301. The width of the smoke - guiding channel 302 is tapered in the direction close to the air inlet 211. That is, in the direction from bottom to top, the width of the smoke - guiding channel 302 gradually narrows in the left - right direction.

[0057] Thus, through the smoke guiding channel 302 with a gradually decreasing width defined by the two guiding surfaces 301, it is possible to prompt some or all of the oil fume to directly flow towards the air inlet 211, which can reduce the generation of eddy currents of the oil fume in the inner cavity 11 of the casing 10, especially the probability of generating eddy currents at the corners of the inner cavity 11, thereby improving the problem of oil fume eddy currents and the resulting aerodynamic noise in the inner cavity 11 of the casing 10.

[0058] In an embodiment of the present utility model, optionally, there are two guiding members 30, and the two guiding members 30 are arranged in the collection cavity 111 and are respectively arranged on opposite sides of the communication hole 141, so as to at least be able to block to a certain extent the upper two corner regions of the collection cavity 111, thereby weakening the eddy currents that can be formed in these two corner regions and weakening the aerodynamic noise generated by the eddy currents. Of course, in other embodiments, three or more guiding members 30 can also be provided. For example, four are provided, where two guiding members 30 are arranged at the aforementioned positions, that is, corresponding to the upper two corners of the collection cavity 111, and the other two guiding members 30 are correspondingly arranged at the lower two corners of the collection cavity 111. It can also be that the other two guiding members 30 are arranged at the upper two corners of the extension cavity 112.

[0059] Optionally, the lower edge of the lowermost guiding surface 301, that is, the lower edge of the guiding member 30, is located outside the outer edge of the corresponding smoke inlet 12 and above the upper edge of the smoke inlet 12. It should be noted that the outer edge of the smoke inlet 12 refers to its side edge that is far from the center of the collection cavity 111 in the left-right direction. For example, please refer to Figure 2 , the left side edge of the left smoke inlet 12 and the right side edge of the right smoke inlet 12 are the outer edges of the smoke inlet 12. That is, the lower edge of the left guiding member 30 is located on the left side of the left side edge of the left smoke inlet 12 and lower than the height of the upper edge of this smoke inlet 12 at the left end; the lower edge of the right guiding member 30 is located on the right side of the right side edge of the right smoke inlet 12 and lower than the height of the upper edge of this smoke inlet 12 at the right end. Thus, a better connection effect between the guiding member 30 and the smoke inlet 12 can be achieved, so that more oil fume can flow into the air inlet 211 along the smoke guiding channel 302. Of course, in some other embodiments, it can also be that the lower edge of the guiding member 30 is located on the side close to the air inlet 211 of the outer edge of the corresponding smoke inlet 12, or is on the same vertical plane as the outer edge of this smoke inlet 12. In other embodiments, it can also be that the lower edge of the guiding member 30 is located on the side close to the air inlet 211 of the upper edge of the smoke inlet 12, or is on the same horizontal plane as the upper edge of this smoke inlet 12.

[0060] Without loss of generality, the smoke inlet 12 is arranged below the top plate 14. After the top plate 14 of the collection chamber 111 is in contact with oil smoke for a long time, it will condense on its inner wall surface to form oil liquid. When the oil liquid gathers to a large enough size, it is easy to drip out of the smoke inlet 12 under the action of gravity, and drip onto the stove or cooking utensils, causing user complaints.

[0061] In view of this, in the embodiment of the utility model, the guide member 30 is optionally provided between the smoke inlet 12 and the top plate 14, and the orthographic projection area of ​​the guide member 30 toward the plane where the top plate 14 is located at least partially overlaps with the orthographic projection area of ​​the smoke inlet 12 toward the plane where the top plate 14 is located. In this way, the surface of the guide member 30 facing away from the smoke inlet 12 plays the role of receiving the oil condensed and dripped from the top plate 14, that is, the guide member 30 also has the function of the oil guide structure, thereby reducing the risk of the oil on the top plate 14 falling out of the smoke inlet 12 and falling on the stove, and improving the user experience of the product. Of course, in other embodiments, an oil guide structure can also be provided on the top plate 14.

[0062] Furthermore, the range hood also includes an oil guide plate 40 disposed at the edge of the connecting hole 141, and the oil guide plate 40 is used to guide the oil flowing out of the extension cavity 112 to the bottom of the collecting cavity 111. In this way, the oil condensed on the surface of the inner cavity 11 of the extension cavity 112 is blocked and guided by the oil guide plate 40 (i.e., guided to the oil cup 15 at the bottom of the collecting cavity 111), which can reduce the risk of the oil condensed in the extension cavity 112 dripping on the stove. It can be understood that the oil guide plate 40 combined with the guide member 30 can basically block the oil condensed in the inner cavity 11 that is easy to drip out of the smoke inlet 12, thereby jointly reducing the risk of oil falling on the stove and improving the user experience of the product. Of course, in other embodiments, the oil guide plate 40 may not be provided.

[0063] In order to further reduce the risk of oil falling on the stove, optionally, the guide member 30 is arranged on the side of the oil guide plate 40 away from the air inlet 211, the upper edge of the guide member 30 is connected to the oil guide plate 40, and the lower edge of the guide member 30 is located outside the outer edge of the smoke inlet 12. In this way, the projection length of the guide member 30 in the left and right directions basically covers the projection length of the smoke inlet 12 falling on the top plate 14 area, so that the oil condensed in the part of the top plate 14 located directly above the smoke inlet 12 is less likely to drip out of the smoke inlet 12. Of course, in other embodiments, the upper edge of the guide member 30 can also be connected to the top plate 14, and adjacent to or abutting the oil guide plate 40.

[0064] Optionally, the lower edge of the oil guide plate 40 is bent with an oil guide flange 41 in a direction away from the flow guide member 30, and the oil guide flange 41 extends downwardly and obliquely from the front to the rear. Specifically, the oil liquid condensed in the extension cavity 112 flows through the surface of the oil guide plate 40 away from the flow guide member 30, then converges into the oil guide flange 41, and then flows from the front to the rear along the extension direction of the oil guide flange 41 to the rear side of the collection cavity 111, and then flows to the oil cup 15 at the bottom along the lower end opening of the oil guide flange 41. In this way, the structure is simple and the oil guiding effect is good, and the problem that the oil liquid is interfered by the air flow on the guiding surface 301 when flowing on the oil guide plate 40 can be avoided. Of course, in other embodiments, the oil guide flange 41 may also extend downwardly and obliquely from the rear to the front to guide the oil liquid to the front side of the collection cavity 111; or a oil guide groove may be fixedly provided at the lower edge of the oil guide plate 40 by welding, riveting or the like.

[0065] The flow guide member 30 is connected to the upper edge of the oil guide plate 40, and the oil guide plate 40 is provided with an air passing through hole 42 corresponding to the first guiding surface 31. In this way, the oil fume flowing in along the guiding surface 301 can continue to flow to the air inlet 211 through the air passing through hole 42, so as to reduce the air inlet interference generated by the oil guide plate 40. Of course, in other embodiments, the flow guide member 30 may also be connected to the lower edge of the oil guide plate 40.

[0066] The upper edge of the flow guide member 30 is provided with a first flange 35, and the first flange 35 is locked to the oil guide plate 40 by screws. In this way, the installation and disassembly of the flow guide member 30 are convenient. Of course, in other embodiments, the connection and fixation of the flow guide member 30 and the oil guide plate 40 may also be realized by welding, riveting or the like.

[0067] And / or, the lower end of the flow guide member 30 is provided with a second flange 36, and the second flange 36 is locked to the rear cavity wall of the collection cavity 111 by screws. In this way, the installation and disassembly of the flow guide member 30 are convenient, and the first flange 35 and the second flange 36 cooperate with each other to make the installation of the flow guide member 30 more stable and reliable. Of course, in other embodiments, the second flange 36 may not be provided and only the first flange 35 may be provided, or the first flange 35 may not be provided and only the second flange 36 may be provided.

[0068] Optionally, the air inlet 211 at least partially extends into the collection cavity 111, that is, a part of the fan housing 21 is arranged in the collection cavity 111, and the other part is arranged in the extension cavity 112. At this time, this range hood is usually called a small side suction range hood product. In this way, the layout space of the collection cavity 111 can be fully utilized, the height dimension of the extension cavity 112 in the up and down direction can be reduced, and the thickness dimension of the collection cavity 111 in the front and rear directions will not be significantly increased, which is beneficial to the miniaturization design of the range hood. Of course, in other embodiments, the fan housing 21 may also be entirely arranged in the extension cavity 112, or entirely arranged in the collection cavity 111.

[0069] In an embodiment where the range hood is configured as a small side-suction product, optionally, the guiding surface 301 includes a first guiding surface 31. The first guiding surface 31 is provided at one end of the guiding member 30 close to the air inlet 211. The first guiding surface 31 extends obliquely upward in the direction close to the air inlet 211. The inclination angle α of the first guiding surface 31 ranges from 10° to 45°, for example, the value can be 15°, 20°, 25° or 30°, etc. Optionally, the inclination angle of the first guiding surface 31 is configured to be from 15° to 25°.

[0070] It should be noted that the inclination angle in the embodiments of the present utility model refers to the angle with the horizontal plane, and the value range is from 0 to 90°. For example, the inclination angle α of the first guiding surface 31 ranges from 10° to 45°, which means the angle between the first guiding surface 31 and the horizontal plane is from 10° to 45°. It can be understood that in an embodiment where the guiding member 30 has a first flanging 35, optionally, the first flanging 35 extends along the vertical plane, then the value range of the angle between the first guiding surface 31 and the first flanging 35 corresponds to 100° to 135°.

[0071] Since the air inlet 211 of the small side-suction product partially extends into the collection cavity 111, under the condition that the projection length dimensions of the first guiding surface 31 in the left-right direction are the same, if the inclination angle α of the first guiding surface 31 is too large, it will cause a significant reduction in the cross-sectional area at the upper end of the smoke guiding channel 302 and an increase in the intake resistance at the air inlet 211, thereby resulting in a decrease in the intake air volume that the fan assembly 20 with the same power can generate. If the inclination angle α of the first guiding surface 31 is too small, it is not conducive to the guiding member 30 to play the role of guiding oil. Therefore, in the embodiments of the present utility model, by limiting the inclination angle α of the first guiding surface 31 to range from 10° to 45°, a better balance point can be achieved between a larger intake air volume and a better smoke guiding effect. In particular, it is applicable to small side-suction products.

[0072] Of course, in other embodiments, for example, in an embodiment where the entire fan housing 21 is provided in the extension cavity 112, the value of α of the first guiding surface 31 can also be other value ranges, such as 45° to 60°.

[0073] The guiding member 30 has at least two intersecting guiding surfaces 301. In this way, when the oil fume flows along the multiple guiding surfaces 301 of the guiding member 30 towards the air inlet 211, the radiation direction of the noise can be changed multiple times, and the radiation area of the noise can be increased, intensifying the consumption of the noise energy, thereby weakening the directional radiation of the noise and reducing the overall noise of the range hood. Of course, in other embodiments, the guiding surface 301 of the guiding member 30 can also be one. For example, the guiding member 30 is configured as an arc-shaped plate protruding away from the air inlet 211, and at this time, the guiding surface 301 is arranged as a concave arc surface.

[0074] In the first embodiment, optionally, the deflector 30 is successively provided with at least three guiding surfaces 301 with gradually increasing inclination angles from top to bottom, and at least one guiding surface 301 at the upper end extends obliquely upward in the direction close to the air inlet 211. In this way, a larger number of guiding surfaces 301 can change the radiation direction of the noise more times, thereby further weakening the directional radiation of the noise.

[0075] In the first embodiment, optionally, the deflector 30 is successively provided with a first guiding surface 31, a second guiding surface 32 and a third guiding surface 33 from top to bottom, and the first guiding surface 31 and the second guiding surface 32 extend obliquely upward in the direction close to the air inlet 211. In this way, both the first guiding surface 31 and the second guiding surface 32 extend obliquely, which can make the width dimension change of the smoke guiding channel 302 more gentle in the left-right direction, facilitating the reduction of the intake resistance and aerodynamic noise at the air inlet 211. Of course, in other embodiments, the second guiding surface 32 may also extend along the vertical plane, and the third guiding surface 33 may extend obliquely upward toward the center.

[0076] And / or, the included angle γ between the third guiding surface 33 and the second guiding surface 32 is greater than 90°. In this way, the situation where the width of the smoke guiding channel 302 gradually shrinks, then gradually expands, and then gradually shrinks in the bottom-up direction is avoided, that is, its width change is more gentle, which is beneficial to the intake movement of the oil fume. Of course, in other embodiments, the included angle γ between the third guiding surface 33 and the second guiding surface 32 may also be less than or equal to 90°.

[0077] In order to make the width change of the smoke guiding channel 302 more gentle in the bottom-up direction, optionally, the included angle β between the third guiding surface 33 and the first guiding surface 31 ranges from 120° to 160°; the included angle θ between the second guiding surface 32 and the first guiding surface 31 ranges from 10° ≤ θ - β ≤ 30°; the included angle γ between the third guiding surface 33 and the second guiding surface 32 ranges from 10° ≤ γ - β ≤ 30°. Of course, in other embodiments, the above included angles β and θ may also adopt other value ranges.

[0078] In the second embodiment, the deflector 30 is successively provided with a first guiding surface 31 and a second guiding surface 32 from top to bottom. The first guiding surface 31 extends obliquely upward in the direction close to the air inlet 211. The inclination angle of the second guiding surface 32 is greater than that of the first guiding surface 31, and the included angle between the first guiding surface 31 and the second guiding surface 32 is greater than 90°. That is, in this embodiment, the number of the guiding surfaces 301 is set to two. In this way, the structure is simpler and easier to implement.

[0079] In the first and second embodiments, optionally, the intersection line of the two lowermost guiding surfaces 301 is located on the side of the outer edge of the smoke inlet 12 that is far from the air inlet 211 of the blower housing 21. That is to say, the intersection line of the two lowermost guiding surfaces 301 is as close as possible to both sides of the collection cavity 111 in the left-right direction, so that the intersection line can be as far away as possible from the air inlet 211 of the blower housing 21, so as to avoid the problem of obvious noise generated by the smoke guiding channel 302 forming a flared shape with a relatively narrow average width, which is beneficial to reducing the noise of the whole machine. Of course, in other embodiments, it may also be that the intersection line of the two lowermost guiding surfaces 301 is located on the side of the outer edge of the corresponding smoke inlet 12 that is close to the air inlet 211, or is on the same vertical plane as the outer edge of the smoke inlet 12.

[0080] Moreover, in the first and second embodiments, optionally, the lowermost guiding surface 301 extends along a vertical plane. The lowermost guiding surface 301 refers to the third guiding surface 33 in the first embodiment and the second guiding surface 32 in the second embodiment. In this way, the opening size of the lower end of the smoke guiding channel 302 can be reduced, which is beneficial to reducing the noise of the whole machine.

[0081] It can be understood that in the first embodiment, since there are three guiding surfaces 301, the intersection line of the two lowermost guiding surfaces 301 is the intersection line of the second guiding surface 32 and the third guiding surface 33; in the second embodiment, since there are only two guiding surfaces 301, the intersection line of the two lowermost guiding surfaces 301 is the intersection line of the first guiding surface 31 and the second guiding surface 32.

[0082] Furthermore, the flow guiding member 30 is provided with a wire harness buckle 341 for clamping the wire harness. In this way, the flow guiding member 30 also has the function of arranging and installing the wire harness, which is beneficial to simplifying the structure and manufacturing cost of the product. Optionally, the wire harness buckle 341 is arranged on the surface of the flow guiding member 30 that is far from the smoke inlet 12, so as to avoid the interference of the wire harness buckle 341 and the wire harness on the guiding effect of the guiding surface 301, and at the same time avoid the exposure of the wire harness buckle 341 and the wire harness. Of course, in other embodiments, it may also be that the wire harness buckle 341 is arranged on the surface of the flow guiding member 30 that is close to the smoke inlet 12.

[0083] The flow guiding member 30 has a drawing hole 342, and the wire harness buckle 341 is formed by bending from the edge of the drawing hole 342. In this way, the assembly process of the wire harness buckle 341 can be saved, and at the same time, the production and manufacturing of the flow guiding member 30 are facilitated. Of course, in other embodiments, it may also be that the wire harness buckle 341 and the flow guiding member 30 are separately provided and assembled into one body.

[0084] The above are only exemplary embodiments of the present utility model, and do not thereby limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields is included within the patent protection scope of the present utility model.

Claims

1. A range hood, characterized in that: include: A housing having an inner cavity, and a smoke inlet and a smoke outlet communicating with the inner cavity; A fan assembly, comprising a fan housing disposed in the inner cavity, the fan housing having an air inlet and an air outlet connected to each other, the air outlet being connected to the smoke outlet; and At least two flow guides are arranged in the inner cavity, and at least two of the flow guides are arranged on opposite sides of the air inlet. The flow guide has a guide surface on the side close to the air inlet, and a smoke guide channel connecting the air inlet and the smoke inlet is defined between the guide surfaces of the two flow guides. The width of the smoke guide channel is gradually reduced in the direction close to the fan housing.

2. The range hood according to claim 1, characterized in that: The guide member is configured as an arc-shaped plate protruding in a direction away from the air inlet.

3. The range hood according to claim 1, characterized in that: The guide member has at least two intersecting guide surfaces.

4. The range hood according to claim 3, characterized in that: The guide member is provided with a first guide surface and a second guide surface in sequence from top to bottom, the inclination angle of the second guide surface is greater than the inclination angle of the first guide surface, and the angle between the first guide surface and the second guide surface is greater than 90°.

5. The range hood according to claim 3, characterized in that: The intersection line of the two guide surfaces at the lowest ends is located on the side of the outer edge of the smoke inlet away from the air inlet; And / or, the lower edge of the guide surface at the lowermost end is located outside the outer edge of the smoke inlet and is located above the upper edge of the smoke inlet.

6. The range hood according to claim 3, characterized in that: The guide member is provided with a first guide surface, a second guide surface and a third guide surface in sequence from top to bottom, and the first guide surface and the second guide surface extend upwardly and obliquely in a direction close to the air inlet.

7. The range hood according to claim 6, characterized in that: An included angle γ between the third guide surface and the second guide surface is greater than 90°.

8. The range hood according to claim 7, characterized in that: The included angle β between the third guide surface and the first guide surface ranges from 120° to 160°.

9. The range hood according to claim 8, characterized in that: The angle θ between the second guide surface and the first guide surface is in the range of 10°≤θ-β≤30°; And / or, the angle γ between the third guide surface and the second guide surface is in the range of 10°≤γ-β≤30°.

10. The range hood according to claim 1, characterized in that: The inner cavity includes a collection cavity and an extension cavity which are connected. The cross-sectional area of ​​the collection cavity is larger than the cross-sectional area of ​​the extension cavity. The smoke inlet, the collection cavity, the extension cavity and the smoke outlet are connected in sequence. The fan housing is at least partially arranged in the extension cavity.

11. The range hood according to claim 10, characterized in that: The air inlet at least partially extends into the collecting chamber, and the guide surface includes a first guide surface, which is arranged at one end of the guide member close to the air inlet and extends upwardly inclined in a direction close to the air inlet, and the inclination angle of the first guide surface is configured to be 10° to 45°.

12. The range hood according to claim 11, characterized in that: The inclination angle α of the first guide surface ranges from 15° to 25°.

13. The range hood according to claim 10, characterized in that: The casing includes a top plate with a connecting hole, the collecting chamber and the extension chamber are connected through the connecting hole, the flow guide is arranged between the smoke inlet and the top plate, and the orthographic projection area of ​​the flow guide toward the plane where the top plate is located at least partially overlaps with the orthographic projection area of ​​the smoke inlet toward the plane where the top plate is located.

14. The range hood according to claim 13, characterized in that: The range hood further comprises an oil guide plate arranged at the edge of the communicating hole, and the oil guide plate is used for guiding the oil flowing out of the extension cavity to the bottom of the collecting cavity.

15. The range hood according to claim 14, characterized in that: The guide member is arranged on a side of the oil guide plate away from the air inlet, and the lower edge of the guide member is located outside the outer edge of the smoke inlet; And / or, the flow guide is connected to the upper edge of the oil guide plate, and the oil guide plate is provided with an air through hole corresponding to the guide surface; And / or, the lower edge of the oil guide plate is bent to form an oil guide flange in a direction away from the flow guide member, and the oil guide flange extends downwardly and obliquely from front to rear.

16. The range hood according to any one of claims 1 to 15, characterized in that: The flow guide is provided with a wire harness buckle for clamping the wire harness.

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