Smoke guiding device and range hood

Abstract

The smoke guiding device comprises a smoke guiding cover, a smoke guiding cavity is formed in the smoke guiding cover, a flow inlet which is vertically downward is formed in the lower portion of the smoke guiding cover, a smoke sucking opening of the range hood is communicated with the smoke guiding cavity through the flow inlet, a flow outlet is formed in the side portion of the smoke guiding cover, and the flow outlet is communicated with the smoke guiding cavity through the flow outlet. The input side of the centrifugal fan communicates with the smoke guide cavity through the flow outlet, a plurality of protruding strips distributed at intervals from bottom to top are arranged on the inner circumferential wall of the smoke guide cover in a protruding mode, and the extending direction of the protruding strips intersects with smoke entering from the flow inlet so that oil drops can be liquefied on the protruding strips. According to the range hood, oil smoke entering from the smoke suction port of the range hood is guided to the input side of the centrifugal fan through the smoke guide cover, the oil smoke is prevented from being accumulated in the range hood shell, the oil smoke makes contact with the protruding strips when passing through the smoke guide cavity, the oil smoke is liquefied on the protruding strips to form oil drops, and the oil drops can downwards flow back to an oil cup of the range hood along the inner wall of the smoke guide cover; the thickness of an oil film attached to an impeller of the centrifugal fan is reduced, and the range hood can keep large suction force.

Description

Technical Field

[0001] The utility model relates to a smoke guiding device and a range hood. Background Art

[0002] At present, in order to achieve the requirement of strong suction, some range hoods use volute-shaped centrifugal fans, which suck in oil smoke from the side and exhaust it from the top, while the suction port of the range hood is located below the side inlet of the centrifugal fan. During the process of exhausting oil smoke, the oil smoke entering the side inlet of the centrifugal fan from the suction port of the range hood will spread to all corners of the inner wall of the range hood housing, causing oil stains to accumulate and be difficult to clean. Moreover, most of the oil stains will liquefy at the position of the centrifugal fan impeller near the side inlet, solidify and adhere. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one of the purposes of the utility model is to provide a smoke guide device that can guide oil smoke from the suction port of the range hood to the side inlet of the centrifugal fan to avoid the accumulation of oil smoke inside the range hood housing and help the smoke to liquefy and then flow downward to the oil cup; the second purpose is to provide a range hood with the above smoke guide device.

[0004] A smoke guide device according to an embodiment of the first aspect of the utility model includes: a smoke guide hood, a smoke guide cavity is provided inside the smoke guide hood, a vertical downward flow inlet is provided at the lower portion of the smoke guide hood, the flow inlet connects the smoke outlet of the range hood with the smoke guide cavity, a flow outlet is provided at the side of the smoke guide hood, the flow outlet connects the input side of the centrifugal fan with the smoke guide cavity, the inner peripheral wall of the smoke guide hood is protruded with a plurality of convex strips spaced from bottom to top, the extension direction of the convex strips intersects with the smoke entering from the flow inlet so that oil droplets are liquefied on the convex strips.

[0005] The smoke guide device according to the embodiment of the utility model has at least the following beneficial effects:

[0006] The smoke diversion device of the above structure utilizes the smoke guide hood to guide the oil smoke entering from the suction port of the range hood through the smoke guide cavity to the input side of the centrifugal fan, thereby preventing the oil smoke from accumulating inside the range hood housing. When the oil smoke passes through the smoke guide cavity, it contacts the convex strips intersecting with the travel path of the oil smoke, so that the oil smoke is liquefied on the convex strips to form oil droplets. The oil droplets can flow back downward along the inner wall of the smoke guide hood to the oil cup of the range hood, thereby reducing the thickness of the oil film attached to the impeller of the centrifugal fan, which is beneficial for the range hood to maintain a larger suction force.

[0007] In some embodiments of the utility model, the smoke guide hood includes an enclosure and a side end plate formed of sheet metal parts, the enclosure includes a front side plate, a left side plate, a right side plate and a top plate connected together, the three edges of the side end plate are respectively connected to the left side plate, the right side plate and the top plate, the outlet is arranged on the side end plate, the lower end of the enclosure and the lower end of the side end plate jointly define the inlet, and the convex strip is formed by the outer peripheral wall of the enclosure being recessed inward.

[0008] In some embodiments of the utility model, the side end plate is provided with an air guide ring at the outlet, the air guide ring is protruding toward the front side plate, and the diameter of the middle through hole of the air guide ring is smaller than the inner diameter of the impeller of the centrifugal fan.

[0009] In some embodiments of the utility model, the outer periphery of the air guide ring has a flat plate portion, the upper portion of the flat plate portion is penetrated by at least two hanging through holes, the upper portion of the side end plate is provided with a first elastic clamp plate which is detachably inserted into the hanging through holes, the lower portion of the side end plate is provided with a second elastic clamp plate which can be abutted against the lower end edge of the flat plate portion, the second elastic clamp plate and the first elastic clamp plate are both extended upward, and the side end plate is provided with two guide ribs corresponding to the two side edges of the flat plate portion respectively.

[0010] In some embodiments of the utility model, a protective net arranged opposite to the inlet port is detachably installed inside the smoke guide cover.

[0011] In some embodiments of the utility model, the protective net is provided with two side ears arranged back to back, the inner walls of the left plate and the right plate are respectively fixed with a horizontally arranged mounting plate, a nut member is fixed on the mounting plate, and the side ears are penetrated with a fastening bolt connected to the nut member.

[0012] In some embodiments of the utility model, the side ear portion can be elastically bent relative to the protective net, and a plastic sleeve arranged along the vertical direction is installed on the side ear portion. The fastening bolt is passed through the middle part of the plastic sleeve, and the inner circumferential wall of the plastic sleeve is provided with a circle of convex ring portion. The fastening bolt is tightly matched with the convex ring portion so that the fastening bolt can only rotate relative to the plastic sleeve.

[0013] In some embodiments of the utility model, the side ear portion includes a vertical plate connected to the protective net and a horizontal plate connected to the lower end of the vertical plate, the horizontal plate is penetrated with a through hole, the plastic sleeve has an anti-slip ring abutting against the lower end surface of the horizontal plate, the side wall of the plastic sleeve is provided with an elastic buckle that can be deformed along its radial direction, and the elastic buckle can abut against the upper end surface of the horizontal plate after passing through the through hole.

[0014] In some embodiments of the present invention, the side end plate is inclined from bottom to top toward the front side plate.

[0015] A range hood according to an embodiment of the second aspect of the utility model comprises a smoke guide device of any of the above-mentioned technical solutions; the range hood utilizes a smoke guide hood to prevent the accumulation of smoke inside the hood housing, and the smoke liquefies on the convex strips to form oil droplets and then flows back into the oil cup, thereby reducing the thickness of the oil film attached to the impeller of the centrifugal fan, which is beneficial for the range hood to maintain a greater suction force.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 This is a structural schematic diagram of an embodiment of the smoke guide device of the utility model;

[0019] Figure 2 for Figure 1 A schematic diagram of the structural decomposition of an embodiment;

[0020] Figure 3 It is a schematic diagram of the local structure in which the protective net and the mounting plate are assembled together;

[0021] Figure 4 for Figure 1 A schematic structural diagram of a smoke guide device and a centrifugal fan combined in an embodiment. DETAILED DESCRIPTION

[0022] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0023] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientations or positional relationships indicated by terms such as "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside", etc., are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] See also Figure 1 and Figure 4 The utility model provides a smoke guide device, comprising: a smoke guide hood 100, wherein a smoke guide cavity is provided inside the smoke guide hood 100, wherein an inlet 101 vertically facing downward is provided at the lower portion of the smoke guide hood 100, wherein the inlet 101 connects the smoke outlet of the range hood with the smoke guide cavity, wherein an outlet 102 is provided at the side of the smoke guide hood 100, wherein the outlet 102 connects the input side of the centrifugal fan 200 with the smoke guide cavity, wherein a plurality of convex strips 130 spaced apart from bottom to top are protruded from the inner peripheral wall of the smoke guide hood 100, wherein the extending direction of the convex strips 130 intersects with the smoke entering from the inlet 101 so that the oil droplets are liquefied on the convex strips 130.

[0027] The smoke diversion device of the above structure utilizes the smoke guide hood 100 to guide the oil smoke entering from the suction port of the range hood through the smoke guide cavity to the input side of the centrifugal fan 200, so as to prevent the oil smoke from accumulating inside the range hood housing. When the oil smoke passes through the smoke guide cavity, it contacts the convex strip 130 intersecting with the travel path of the oil smoke, so that the oil smoke is liquefied on the convex strip 130 to form oil droplets. The oil droplets can flow downward along the inner wall of the smoke guide hood 100 back to the oil cup of the range hood, or the oil droplets remain attached to the inner wall of the smoke guide hood 100, both of which can reduce the thickness of the oil film attached to the impeller of the centrifugal fan 200, which is beneficial for the range hood to maintain a larger suction force.

[0028] See also Figure 1 and Figure 2 In some embodiments of the utility model, the smoke guide hood 100 includes a surrounding panel 110 and a side end panel 120 formed of sheet metal parts, the surrounding panel 110 includes a front side panel 111, a left side panel 112, a right side panel 113 and a top panel 114 connected together, the three edges of the side end panel 120 are respectively connected to the left side panel 112, the right side panel 113 and the top panel 114, the outlet 102 is provided at the side end panel 120, the lower end of the surrounding panel 110 and the lower end of the side end panel 120 jointly define the inlet 101, and the convex strip 130 is formed by the outer peripheral wall of the surrounding panel 110 being recessed inwardly. It should be noted that the front side panel 111, the left side panel 112, the right side panel 113 and the top panel 114 are obtained by stamping a piece of sheet metal, and the convex strip 130 is formed simultaneously during the stamping process. Then the side end panel 120 is assembled with the enclosure 110 by welding or connecting with other components. The smoke hood 100 of this structure is easy to produce and process, and the cost is low.

[0029] See also Figure 1 and Figure 2 In some embodiments of the utility model, the side end plate 120 is provided with an air guide ring 140 at the outlet 102, the air guide ring 140 is protruding toward the direction of the front side plate 111, and the diameter of the middle through hole of the air guide ring 140 is smaller than the inner diameter of the impeller of the centrifugal fan 200. It should be noted that when the oil smoke passes through the outlet 102 to enter the impeller of the centrifugal fan 200, it is easy to liquefy at the contour edge of the outlet 102 and flow to the impeller of the centrifugal fan 200. The air guide ring 140 with the above structure can well solve the above problem. When the airflow carrying oil smoke passes through the air guide ring 140 protruding from the side end plate 120, oil droplets will be generated attached to the air guide ring 140. Since the diameter of the middle through hole of the air guide ring 140 is smaller than the inner diameter of the impeller of the centrifugal fan 200, when subjected to strong suction, the airflow carrying oil smoke will not directly contact the circumferential edge of the impeller, which is beneficial to reduce the oil droplets attached to the impeller.

[0030] See also Figure 2 In some embodiments of the utility model, in order to realize the convenient disassembly and installation of the air guide ring 140 so that the user can clean the range hood, the outer periphery of the air guide ring 140 has a flat plate portion 141, and the upper portion of the flat plate portion 141 is penetrated by at least two hanging through holes 142, and the upper portion of the side end plate 120 is provided with a first elastic clamping plate 121 that is detachably penetrated through the hanging through holes 142, and the lower portion of the side end plate 120 is provided with a second elastic clamping plate 122 that can abut against the lower end edge of the flat plate portion 141, and the second elastic clamping plate 122 and the first elastic clamping plate 121 are both extended upward, and the side end plate 120 is provided with two guide ribs 123 corresponding to the two side edges of the flat plate portion 141 respectively. The second elastic clamping plate 122 and the first elastic clamping plate 121 are both formed on the side end plate 120 by stamping. When assembling the air guide ring 140, the two mounting holes 142 are respectively inserted into the two first elastic clamping plates 121, and the two sides of the flat plate portion 141 are respectively pressed against the two guide ribs 123, and then the air guide ring 140 is slid downward to insert the lower edge of the flat plate portion 141 between the second elastic clamping plate 122 and the side end plate 120, so that the air guide ring 140 can remain stable under the action of gravity. When disassembling the air guide ring 140, the air guide ring 140 is lifted upward, and the lower edge of the flat plate portion 141 is separated from the second elastic clamping plate 122. At this time, the mounting hole 142 moves upward a certain distance relative to the first elastic clamping plate 121, and then the air guide ring 140 is driven to move away from the side end plate 120 so that the first elastic clamping plate 121 can be detached from the mounting hole 142.

[0031] See also Figure 1 and Figure 4 In some embodiments of the present invention, in order to prevent the user's hand from directly reaching into the smoke hood 100 and possibly causing personal injury, a protective net 300 disposed opposite to the inlet 101 is detachably installed inside the smoke hood 100. When cleaning is required, the range hood needs to be powered off, and then the protective net 300 is removed before the hand and cleaning tools can be inserted into the smoke hood 100.

[0032] See also Figure 3 In some embodiments of the present invention, the protective net 300 is provided with two side ears 310 arranged opposite to each other, and a horizontally arranged mounting plate 400 is fixedly provided on the inner wall of the left plate 112 and the right plate 113 respectively, and a nut member 410 is fixedly provided on the mounting plate 400, and a fastening bolt 600 connected to the nut member 410 is passed through the side ear 310. The fastening bolt 600 and the nut member 410 are connected or separated by the fastening bolt 600 to facilitate the convenient disassembly and assembly of the protective net 300.

[0033] See also Figure 3In some embodiments of the utility model, the side ear portion 310 can be elastically bent relative to the protective net 300, and a plastic sleeve 500 arranged in the vertical direction is installed on the side ear portion 310. The fastening bolt 600 is passed through the middle of the plastic sleeve 500. The inner peripheral wall of the plastic sleeve 500 is provided with a convex ring portion 510. The fastening bolt 600 and the convex ring portion 510 are tightly matched so that the fastening bolt 600 can only rotate relative to the plastic sleeve 500. It should be noted that if the fastening bolt 600 is directly screwed out of the nut member 410, the fastening bolt 600 will fall on the stove and be easily lost. By arranging the plastic sleeve 500 on the side ear portion 310, the fastening bolt 600 can only rotate relative to the plastic sleeve 500, and the fastening bolt 600 will not fall. Moreover, since it is difficult to loosen the two fastening bolts 600 synchronously, when a single fastening bolt 600 is screwed, a displacement along the length direction of the fastening bolt 600 is generated between the nut member 410 on the mounting plate 400 and the fastening bolt 600, and the side ear portion 310 can be elastically bent to satisfy the relative displacement between the nut member 410 and the fastening bolt 600.

[0034] See also Figure 3 In some embodiments of the utility model, the side ear portion 310 includes a vertical plate 311 connected to the protective net 300 and a horizontal plate 312 connected to the lower end of the vertical plate 311, the horizontal plate 312 is penetrated by a through hole 313, the plastic sleeve 500 has an anti-slip ring 520 abutting against the lower end surface of the horizontal plate 312, and the side wall of the plastic sleeve 500 is provided with an elastic buckle 530 that can be deformed along its radial direction, and the elastic buckle 530 can abut against the upper end surface of the horizontal plate 312 after passing through the through hole 313. When installing the plastic sleeve 500 on the side ear 310, the plastic sleeve 500 is passed through the perforation 313. During this process, the elastic buckle 530 undergoes radial elastic deformation in the perforation 313. After the elastic buckle 530 passes through the perforation 313, it recovers the deformation so that the elastic buckle 530 is located above the horizontal plate 312. At this time, the horizontal plate 312 is located between the anti-slip ring 520 and the elastic buckle 530, thereby preventing the plastic sleeve 500 from detaching from the side ear 310.

[0035] See also Figure 4 In some embodiments of the utility model, the side end plate 120 is tilted from bottom to top toward the front side plate 111. It should be noted that since the side inlet of the impeller of the centrifugal fan 200 is against the outer surface of the side end plate 120, that is, the impeller of the centrifugal fan 200 is consistent with the tilt angle of the side end plate 120, when the user can hold the cleaning tool from bottom to top through the outlet 102 and extend it into the impeller of the centrifugal fan 200, it is very convenient to directly clean part of the impeller.

[0036] The utility model also discloses a range hood, comprising a smoke guide device of any of the above-mentioned technical solutions; the range hood utilizes a smoke guide hood 100 to prevent smoke from accumulating inside the range hood housing, and the smoke liquefies on the convex strips 130 to form oil droplets and then flows back into the oil cup, reducing the thickness of the oil film attached to the impeller of the centrifugal fan 200, which is beneficial for the range hood to maintain a large suction force.

[0037] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A smoke guide device, characterized in that: include: A smoke guide hood (100) is provided with a smoke guide cavity inside the smoke guide hood (100), a vertical downward inlet (101) is provided at the lower part of the smoke guide hood (100), the inlet (101) connects the smoke outlet of the range hood with the smoke guide cavity, a side of the smoke guide hood (100) is provided with an outlet (102), the outlet (102) connects the input side of the centrifugal fan (200) with the smoke guide cavity, and the inner peripheral wall of the smoke guide hood (100) is protruding with a plurality of convex strips (130) spaced from bottom to top, the extension direction of the convex strips (130) intersecting with the smoke entering from the inlet (101) so that oil droplets are liquefied on the convex strips (130).

2. A smoke guide device according to claim 1, characterized in that: The smoke guide hood (100) includes an enclosure (110) and a side end plate (120) formed of sheet metal parts, the enclosure (110) includes a front side plate (111), a left side plate (112), a right side plate (113) and a top plate (114) connected together, the three edges of the side end plate (120) are respectively connected to the left side plate (112), the right side plate (113) and the top plate (114), the outlet (102) is provided on the side end plate (120), the lower end of the enclosure (110) and the lower end of the side end plate (120) jointly define the inlet (101), and the convex strip (130) is formed by the outer peripheral wall of the enclosure (110) being recessed inwardly.

3. A smoke guide device according to claim 2, characterized in that: The side end plate (120) is provided with an air guide ring (140) at the outlet (102); the air guide ring (140) is protruding in the direction of the front side plate (111); and the diameter of the middle through hole of the air guide ring (140) is smaller than the inner diameter of the impeller of the centrifugal fan (200).

4. A smoke guide device according to claim 3, characterized in that: The outer periphery of the air guide ring (140) has a flat plate portion (141), the upper portion of the flat plate portion (141) is penetrated by at least two hanging through holes (142), the upper portion of the side end plate (120) is provided with a first elastic clamping plate (121) detachably inserted into the hanging through hole (142), the lower portion of the side end plate (120) is provided with a second elastic clamping plate (122) which can abut against the lower edge of the flat plate portion (141), the second elastic clamping plate (122) and the first elastic clamping plate (121) are both extended upwards, and the side end plate (120) is provided with two guide convex ribs (123) respectively corresponding to the two side edges of the flat plate portion (141).

5. A smoke guide device according to claim 2, characterized in that: A protective net (300) arranged opposite to the inlet (101) is detachably mounted inside the smoke guide cover (100).

6. A smoke guide device according to claim 5, characterized in that: The protective net (300) is provided with two side ears (310) arranged in opposite directions, and the inner walls of the left plate (112) and the right plate (113) are respectively fixed with a horizontally arranged mounting plate (400), and a nut member (410) is fixed on the mounting plate (400), and the side ears (310) are penetrated with a fastening bolt (600) connected to the nut member (410).

7. A smoke guiding device according to claim 6, characterized in that: The side ear portion (310) can be elastically bent relative to the protective net (300), and a plastic sleeve (500) arranged in a vertical direction is installed on the side ear portion (310). The fastening bolt (600) is passed through the middle of the plastic sleeve (500), and the inner wall of the plastic sleeve (500) is provided with a circle of convex ring portion (510). The fastening bolt (600) is tightly matched with the convex ring portion (510) so that the fastening bolt (600) can only rotate relative to the plastic sleeve (500).

8. A smoke guiding device according to claim 7, characterized in that: The side ear portion (310) includes a vertical plate (311) connected to the protective net (300) and a horizontal plate (312) connected to the lower end of the vertical plate (311), the horizontal plate (312) is penetrated by a through hole (313), the plastic sleeve (500) has an anti-slip ring (520) abutting against the lower end surface of the horizontal plate (312), and the side wall of the plastic sleeve (500) is provided with an elastic buckle (530) that can be deformed in its radial direction, and the elastic buckle (530) can abut against the upper end surface of the horizontal plate (312) after passing through the through hole (313).

9. A smoke guiding device according to claim 2, characterized in that: The side end plate (120) is arranged to be inclined from bottom to top in a direction toward the front side plate (111).

10. A range hood, characterized in that: It comprises a smoke guiding device according to any one of claims 1-9.

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