Range hood

Abstract

The utility model discloses a range hood, and relates to the technical field of range hoods, the range hood comprises a housing and an oil screen, the housing is provided with at least two smoke inlets, the at least two smoke inlets are distributed at intervals along the left-right direction, and the at least two smoke inlets comprise a first smoke inlet located at the head end and a second smoke inlet located at the tail end; the oil screen is provided with a plurality of mesh holes, the mesh holes comprise long-strip-shaped holes, the oil screen comprises a first screen part arranged at the first smoke inlet and a second screen part arranged at the second smoke inlet, the long-strip-shaped holes of the first screen part obliquely extend upwards from left to right, and the long-strip-shaped holes of the second screen part obliquely extend upwards from right to left. According to the technical scheme, resistance borne by airflow when the airflow flows through the oil screen can be reduced, and the intensity of negative pressure formed outside the oil screen is improved.

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] In the related art, a range hood generally includes a housing, an oil net and a centrifugal fan. The housing is usually provided with a smoke inlet, a smoke outlet and a smoke passage cavity communicating between the two. The oil net is arranged at the smoke inlet. Driven by the operation of the centrifugal fan, external oil fume can flow into the smoke passage cavity from the mesh holes of the oil net and finally be discharged through the smoke outlet. Since the mesh holes of the oil net are usually circular holes with small diameters, a large flow loss occurs when the energy of the oil fume flows through the oil net, and the negative pressure intensity formed outside the oil net will be weakened. Summary of the Utility Model

[0003] The main object of the utility model is to propose a range hood, aiming to reduce the resistance suffered by the air flow when flowing through the oil net and improve the negative pressure intensity formed outside the oil net.

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

[0005] A housing, provided with at least two smoke inlets, the at least two smoke inlets are spaced apart in the left-right direction, and include a first smoke inlet at the head end and a second smoke inlet at the tail end; and

[0006] An oil net, provided with a plurality of mesh holes, the mesh holes include long strip-shaped holes, the oil net includes a first net part arranged at the first smoke inlet and a second net part arranged at the second smoke inlet, the long strip-shaped holes of the first net part extend obliquely upward from left to right, and the long strip-shaped holes of the second net part extend obliquely upward from right to left.

[0007] In an embodiment, the included angle between the extending direction of the long strip-shaped hole and the left-right direction ranges from 35° to 55°.

[0008] In an embodiment, the housing includes a diversion plate, a receiving groove is recessed on the outer surface of the diversion plate, and the smoke inlet is arranged on the bottom wall of the receiving groove.

[0009] In an embodiment, the depth of the receiving groove gradually increases in the direction from top to bottom.

[0010] In an embodiment, at least part of the long strip-shaped holes are distributed on the opposite sides of the oil net in the left-right direction, and the side edges of the oil net are adjacent to the side walls of the receiving groove.

[0011] In one embodiment, a plurality of oil guiding channels are provided on the outer surface of the oil net. The oil guiding channels of the first net part extend obliquely upward from left to right, and the oil guiding channels of the second net part extend obliquely upward from right to left.

[0012] In one embodiment, in the extending direction of the long strip-shaped holes, a plurality of long strip-shaped holes are spaced apart and form a hole group. A plurality of the hole groups are spaced apart in the left-right direction, and the intervals between adjacent two of the hole groups form the oil guiding channels.

[0013] In one embodiment, adjacent two long strip-shaped holes belonging to different hole groups are arranged in a staggered manner in the left-right direction.

[0014] In one embodiment, the oil guiding channels are configured as oil guiding grooves recessed inward from the outer surface of the oil net or oil guiding ribs protruding outward. The oil guiding grooves or the oil guiding ribs are provided at the intervals between adjacent two of the hole groups.

[0015] In one embodiment, the oil net is further provided with a handle hole and is detachably connected to the smoke inlet.

[0016] In one embodiment, the first net part and the second net part are separately arranged.

[0017] In one embodiment, at least the regions of the outer surface and the inner surface of the oil net having the mesh holes are arranged in a plane.

[0018] In the technical solution of the present utility model, by setting the extending direction of the long strip-shaped holes to match the air inlet direction of the air flow, that is, the extending direction of the long strip-shaped holes is substantially parallel to the air inlet direction of the inlet air flow, and the effective air inlet cross-section of a single mesh hole becomes larger, the resistance suffered by the air flow when flowing through the oil net can be reduced, and the flow loss of the air flow when flowing through the oil net can be reduced, thereby being beneficial to forming a larger negative pressure region and a higher negative pressure intensity outside the oil net. Secondly, it can also reduce the eddy current and pneumatic noise generated when the air flow enters. Description of the Drawings

[0019] 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. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0020] Figure 1 It is a partial cross-sectional view of an embodiment of an oil fume extractor provided by the present utility model;

[0021] Figure 2 ForFigure 1 Partial enlarged view at position A

[0022] Figure 3 is Figure 1 Schematic structural view of the illustrated embodiment after removing the oil screen

[0023] Figure 4 is Figure 1 Front view of the first net part in

[0024] Explanation of the reference numerals in the drawings:

[0025] 10. Machine housing; 11. Smoke inlet; 11a. First smoke inlet; 11b. Second smoke inlet; 12. Smoke outlet; 13. Smoke passage; 14. Deflector; 141. Receiving groove

[0026] 20. Oil screen; 21. First net part; 22. Second net part; 23. Mesh holes; 231. Long strip holes; 232. Hole group; 24. Oil guiding channel; 25. Handle hole

[0027] 30. Centrifugal fan; 31. Air inlet

[0028] 40. Cooker

[0029] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings Specific embodiments

[0030] 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 making creative efforts shall fall within the protection scope of the present utility model

[0031] 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, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly

[0032] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0033] In the related art, a range hood usually includes a housing, an oil screen and a centrifugal fan. The housing is usually provided with a smoke inlet, a smoke outlet and a smoke passage cavity connecting the two. The oil screen is provided at the smoke inlet. Driven by the operation of the centrifugal fan, the external oil smoke can flow into the smoke passage cavity from the mesh of the oil screen and finally be discharged through the smoke outlet. Since the mesh of the oil screen is usually provided with small-diameter circular holes, the energy of the oil smoke will have a large flow loss when flowing through the oil screen, and the negative pressure strength formed outside the oil screen will be weakened.

[0034] In view of this, the utility model provides a range hood.

[0035] See also Figures 1 to 4 In one embodiment of the utility model, the range hood includes a casing 10 and an oil net 20. The casing 10 is provided with at least two smoke inlets 11, and the at least two smoke inlets 11 are spaced apart along the left-right direction and include a first smoke inlet 11a located at the head end and a second smoke inlet 11b located at the tail end; the oil net 20 is provided with a plurality of mesh holes 23 and includes a first net portion 21 provided at the first smoke inlet 11a and a second net portion 22 provided at the second smoke inlet 11b.

[0036] It should be noted that the left-right direction and the up-down direction in the embodiment of the utility model refer to the orientation of the range hood after correct installation, and the side of the range hood facing the stove is defined as the front, and the side away from the stove is defined as the rear.

[0037] Without loss of generality, whether it is a double-burner stove or a multi-burner stove, it is usually preferred to arrange two or more burner eyes in the left and right direction; correspondingly, whether it is an independent range hood or the range hood part covered by the integrated stove, it usually has a larger length dimension in the left and right direction, so as to cover the multiple burner eyes distributed in the left and right direction as much as possible and improve the smoke exhaust effect of the range hood.

[0038] For the convenience of writing, the following will be explained by taking the embodiment in which the housing 10 has two smoke inlets 11 as an example. Of course, it can be understood that in other embodiments, the housing 10 may have three or more smoke inlets 11, and the oil net 20 may be provided with a third net part and a fourth net part, etc.

[0039] It can be understood that the first net portion 21 and the second net portion 22 can be either an integrated structure or a split structure. For example, see Figure 1 and Figure 4 In the embodiment where the oil net 20 is detachably installed at the smoke inlet 11, optionally, the first net portion 21 and the second net portion 22 are separately arranged to facilitate the user to separately operate the disassembly and installation of the first net portion 21 or the second net portion 22, that is, to facilitate the disassembly and assembly operation of the oil net 20 and improve the user experience.

[0040] See also Figure 1 and Figure 4 Optionally, the mesh 23 includes a long strip hole 231, the long strip hole 231 of the first mesh part 21 extends upwardly from left to right, and the long strip hole 231 of the second mesh part 22 extends upwardly from right to left. That is, the long strip hole 231 extends upwardly in a direction close to the center of the smoke chamber 13.

[0041] In this way, by setting the extension direction of the long strip hole 231 to match the intake direction of the airflow, that is, the extension direction of the long strip hole 231 is roughly parallel to the intake direction of the intake airflow, and the effective intake cross-section of a single mesh hole 23 becomes larger, the resistance of the airflow when flowing through the oil net 20 can be reduced, and the flow loss of the airflow when flowing through the oil net 20 can be reduced, which is conducive to forming a larger negative pressure area and a higher negative pressure intensity outside the oil net 20. Secondly, it can also reduce the vortex and aerodynamic noise generated by the airflow during intake.

[0042] See also Figure 1 , Figure 1 The arrow in represents the flow direction of the airflow. Without loss of generality, the air inlet 31 of the centrifugal fan 30 is usually arranged in the middle of the smoke chamber 13 and above the smoke inlet 11, so that the intake airflow flows through the oil net 20 along the direction of the inclination angle of approximately 35° to 55° with the horizontal plane. In view of this, optionally, the angle θ between the extension direction of the long strip hole 231 and the left and right direction ranges from 35° to 55°. In this way, the extension direction of the long strip hole 231 can better adapt to the intake direction of the intake airflow, so as to reduce the resistance of the airflow when flowing through the oil net 20, and enhance the negative pressure strength formed outside the oil net 20. Of course, those skilled in the art can appropriately adjust the inclination range of the long strip hole 231 and the horizontal plane according to the actual number, layout position and working parameters of the centrifugal fan 30, for example, when the angle θ of the centrifugal fan 30 is adjusted to 60° to 75°, etc.

[0043] Optionally, the elongated holes 231 can be configured as rectangular holes, waist-shaped holes, oval holes, etc., and the present application does not make specific limitations thereto. Secondly, the lengths of the plurality of elongated holes 231 can be set to be the same or some can be different.

[0044] Without loss of generality, when the cooking fume flows over the outer surface of the oil mesh 20, liquid droplets (including but not limited to liquids composed of grease, water, or a mixture of oil and water) will condense. These liquid droplets are simultaneously affected by the action of gravity and the intake air flow, and present a disorderly downward flowing situation. Since the flowing direction of the liquid droplets forms an angle of approximately 45° with the intake direction of the intake air flow, it is easy for the liquid droplets to be laterally interfered by the intake air flow and randomly drip on the cooker or cookware 40, and even the situation where the liquid droplets drip into the food in the cookware 40 may occur, which will cause complaints from users.

[0045] Please refer to Figure 2 , Figure 2 In the figure, the arrows indicate the flowing direction of the liquid droplets. In order to improve the problem of random dripping of the liquid droplets, further, a plurality of oil guiding channels 24 are provided on the outer surface of the oil mesh 20. The oil guiding channels 24 of the first mesh portion 21 extend obliquely upward from left to right, and the oil guiding channels 24 of the second mesh portion 22 extend obliquely upward from right to left. In this way, the liquid droplets condensed on the outer surface of the cooking fume can flow obliquely downward along the oil guiding channels 24 towards both sides of the housing 10 and flow to the bottom of the housing 10 and the oil cup.

[0046] Since the flowing direction of the liquid droplets matches the intake direction of the intake air flow (i.e., the flowing direction is substantially parallel to the intake direction of the intake air flow), it can not only use the intake air flow to restrain the flowing of the liquid droplets, but also improve the problem that the liquid droplets are easily dripped due to the lateral interference of the intake air flow, thereby enhancing the user experience of the product. Secondly, since the oil guiding channels 24 extend obliquely, their effective length is increased, and the contact time between the cooking fume and the oil mesh 20 can be increased, thereby improving the oil-liquid separation degree of the whole machine.

[0047] Please refer to Figure 4 In the embodiment where the mesh holes 23 include the elongated holes 231, optionally, in the extending direction of the elongated holes 231, a plurality of elongated holes 231 are spaced apart and form a hole group 232. The plurality of hole groups 232 are spaced apart in the left-right direction, and the intervals between adjacent two hole groups 232 form the oil guiding channels 24. In this way, the structure is simple and easy to implement. Of course, in some other embodiments, the elongated holes 231 may not be provided. For example, a plurality of circular holes distributed in the obliquely upward direction form a hole group 232, and the intervals between adjacent two hole groups 232 form the oil guiding channels 24.

[0048] In other embodiments, the oil guiding channel 24 may also be an oil guiding groove configured to be recessed inward from the outer surface of the oil mesh 20, or an oil guiding rib configured to protrude outward from the outer surface of the oil mesh 20. The oil guiding groove or the oil guiding rib is provided at the interval between two adjacent hole groups 232 and extends obliquely upward in the direction approaching the center of the smoke passing cavity 13.

[0049] In order to promote the droplets to flow substantially along an inclined straight line, further, a blocking rib (not shown in the drawings) is provided at the interval between the upper and lower adjacent mesh holes 23 in the same hole group 232. In this way, when the droplets flow through this interval, it is not easy for them to flow into the next oil guiding channel 24 from the existing oil guiding channel 24, and the risk of accidental dripping when crossing different oil guiding channels 24 is reduced. Of course, in other embodiments, the blocking rib may not be provided.

[0050] Please refer to Figure 4 , two adjacent elongated holes 231 belonging to different hole groups 232 are arranged in a staggered manner in the left-right direction. That is, in this way, the structural strength and stiffness of the oil mesh 20 can be improved. Of course, in other embodiments, two adjacent elongated holes 231 belonging to different hole groups 232 may also be arranged opposite to each other in the left-right direction.

[0051] Please refer to Figure 2 and Figure 3 , further, the casing 10 includes a diversion plate 14. A receiving groove 141 is recessed on the outer surface of the diversion plate 14, and the smoke inlet 11 is provided on the bottom wall of the receiving groove 141. In this way, under the operation of the centrifugal fan 30, a negative pressure area is formed in the receiving groove 141, so that the oil fume can be more concentrated in this negative pressure area and more droplets can be condensed, so that small-volume droplets can be more quickly converged into large-volume droplets, which is beneficial for the droplets to flow downward to the bottom of the casing 10. Of course, in other embodiments, the receiving groove 141 may not be provided.

[0052] Without loss of generality, the plane where the oil mesh 20 is located, that is, the bottom surface of the receiving groove 141, is usually not in the vertical plane, but is set at a non-zero angle with the vertical plane, and this bottom surface usually extends obliquely forward in the direction from bottom to top, so that the oil mesh 20 can correspondingly cover a larger range of the cooking appliance. It can be understood that the elongated holes 231 in the embodiments of the present invention extend obliquely upward and toward the centrifugal fan, and also extend obliquely forward and toward the centrifugal fan.

[0053] Optionally, the depth of the receiving groove 141 gradually increases in the direction from top to bottom. That is, the bottom surface of the receiving groove 141 has a larger inclination angle relative to the horizontal plane. In this way, it is beneficial to increase the range of the cooking appliance area that the oil net 20 can cover, thereby improving the smoke exhaust effect of the range hood. Of course, in other embodiments, the depth of the receiving groove 141 may be basically unchanged in the up and down direction, or the depth of the receiving groove 141 may gradually decrease in the direction from top to bottom.

[0054] Please refer to Figure 1 and Figure 2 , optionally, at least part of the long strip holes 231 are distributed on the opposite sides of the oil net 20 in the left and right directions, and the side edges of the oil net 20 are adjacent to the groove side walls of the receiving groove 141. That is, the two outer side edges of the oil net 20 in the left and right directions are adjacent to the two side edges of the casing 10 in the left and right directions, and the long strip holes 231 are also adjacent to the side edges of the casing 10. In this way, the negative pressure distribution area of the range hood can be increased, so that the oil fumes located on the left and right sides of the casing 10 can be subjected to a more significant negative pressure adsorption effect and can be more inhaled into the smoke passage 13, thereby increasing the smoke gathering area of the range hood and improving its smoke exhaust effect.

[0055] Specifically and optionally, the distance between the side edge of the oil net 20 and the groove side wall of the receiving groove 141 ranges from 8 mm to 20 mm. In this way, the long strip holes 231 can be made as close as possible to the two side edges of the casing 10 in the left and right directions to improve the adsorption effect of the oil fumes on the left and right sides of the range hood. Of course, in other embodiments, the distance between the side edge of the oil net 20 and the groove side wall of the receiving groove 141 in the left and right directions may also take other values.

[0056] Please refer to Figure 4 , further, the oil net 20 is also provided with a handle hole 25 and is detachably connected to the smoke inlet 11. In this way, it is convenient for the user to apply the operation force for disassembly and installation through the handle hole 25 to improve the disassembly and assembly convenience of the oil net 20. Optionally, the handle hole 25 is provided on the top edge of the oil net 20 and extends in the left and right directions. Of course, in other embodiments, the handle hole 25 may not be provided, or the handle hole 25 may be provided at other positions of the oil net 20.

[0057] Optionally, the outer surface and the inner surface of the oil net 20 are at least planar in the area having the mesh holes 23. That is, the surface of the area where the mesh holes 23 are located is flat and has no convex structure. In this way, it can not only avoid the problem that droplets are not easy to gather and flow due to the convex structure, but also avoid the problem that the user is accidentally cut by the convex structure when cleaning the oil net 20. Of course, in other embodiments, the outer surface may be planar, but the inner surface has a convex structure. For example, a reinforcing flanging is formed by inwardly extending the hole edge of the mesh hole 23.

[0058] The above are only exemplary embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. 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 in the patent protection scope of the present utility model.

Claims

1. A range hood, characterized in that: include: The housing is provided with at least two smoke inlets, the at least two smoke inlets are spaced apart in the left-right direction, and include a first smoke inlet located at the head end, and a second smoke inlet located at the tail end; and The oil net is provided with a plurality of mesh holes, wherein the mesh holes include long strip holes. The oil net includes a first net portion provided at the first smoke inlet and a second net portion provided at the second smoke inlet. The long strip holes of the first net portion extend upwardly and obliquely from left to right, and the long strip holes of the second net portion extend upwardly and obliquely from right to left.

2. The range hood according to claim 1, characterized in that: The angle between the extending direction of the long strip hole and the left-right direction ranges from 35° to 55°.

3. The range hood according to claim 1, characterized in that: The housing comprises a guide plate, an outer surface of the guide plate is recessed with a receiving groove, and the smoke inlet is arranged on the bottom wall of the receiving groove.

4. The range hood according to claim 3, characterized in that: The depth of the receiving groove is gradually increased in a direction from top to bottom.

5. The range hood according to claim 3, characterized in that: At least part of the long strip holes are distributed on two opposite sides of the oil net in the left-right direction, and the side edge of the oil net is adjacent to the groove side wall of the receiving groove.

6. The range hood according to claim 1, characterized in that: The outer surface of the oil net is provided with a plurality of oil guide channels. The oil guide channels of the first net portion extend upwardly and obliquely from left to right, and the oil guide channels of the second net portion extend upwardly and obliquely from right to left.

7. The range hood according to claim 6, characterized in that: In the extending direction of the long strip holes, a plurality of the long strip holes are distributed at intervals to form a hole group. The plurality of hole groups are distributed at intervals along the left-right direction, and the interval between two adjacent hole groups forms the oil guide channel.

8. The range hood according to claim 7, characterized in that: Two adjacent long strip holes belonging to different hole groups are arranged in a staggered distribution in the left-right direction.

9. The range hood according to claim 1, characterized in that: The oil net is also provided with a hand-grip hole and can be detachably connected to the smoke inlet.

10. The range hood according to any one of claims 1 to 9, characterized in that: The first net part and the second net part are separately arranged; And / or, the outer surface and the inner surface of the oil net are arranged in a plane at least in the area with the mesh holes.

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