Connecting structure for air outlet cover and adapter ring on range hood

Abstract

A connecting structure of an air outlet cover and an adapter ring on a range hood comprises the air outlet cover, the air outlet cover is provided with an inner peripheral wall extending upwards, an annular bottom wall and an outer peripheral wall, and an annular groove with an upward notch is formed among the outer peripheral wall, the annular bottom wall and the corresponding inner peripheral wall; the adapter ring is provided with a side peripheral wall extending upwards, and the periphery of the lower end of the side peripheral wall is inserted into the annular groove through the notch; a blocking rib is arranged on the annular bottom wall in the circumferential direction in a protruding mode, the blocking rib is located between the inner circumferential wall and the outer circumferential wall and is opposite to the inner circumferential wall and the outer circumferential wall in a spaced mode, a sealing ring is arranged between the blocking rib and the outer circumferential wall, and the lower end face of the sealing ring is opposite to and attached to the annular bottom wall. The periphery of the lower end of the side peripheral wall is supported on the upper end surface of the sealing ring; and the fastening piece is connected with the adapter ring and the air outlet cover so as to downwards press the periphery of the lower end of the side peripheral wall of the adapter ring on the upper end face of the sealing ring. Compared with the prior art, oil leakage at the joint of the air outlet cover and the adapter ring can be avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of kitchen appliances, and in particular relates to a connection structure between an air outlet cover and an adapter ring on a range hood. Background Art

[0002] The air outlet of the range hood is generally connected to the exhaust pipe through an air outlet hood and an adapter ring to discharge the smoke, and the oil separated from the oil smoke flows back into the range hood through the air outlet hood and is collected in the oil cup. Specifically, the scheme disclosed in the Chinese utility model patent No. 202221537701.5 "An air outlet assembly and a range hood using the air outlet assembly" (authorization announcement No. CN218096119U) includes an air outlet hood and a smoke pipe arranged on the air outlet hood, and a transition pipe (i.e., an adapter ring) is also arranged between the air outlet hood and the smoke pipe. The transition pipe is hollow and has a first end and a second end opposite to each other. The first end is connected to the output end of the air outlet hood, and the second end is connected to the input end of the smoke pipe, so that the air outlet hood and the smoke pipe are fluidically connected, and the air outlet assembly also includes a buckle assembly that detachably connects the transition pipe to the air outlet hood.

[0003] There is oil leakage at the connection between the existing air outlet cover and the adapter ring, which affects the use. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a connection structure between an air outlet cover and an adapter ring on a range hood in view of the current status of the prior art, so as to avoid oil leakage at the connection between the two.

[0005] The technical solution adopted by the utility model to solve the above technical problems is: a connection structure between an air outlet cover and an adapter ring on a range hood, comprising:

[0006] The air outlet cover has an inner peripheral wall extending upward, the inner peripheral wall defines an air outlet passage that passes through from top to bottom, the lower end opening of the air outlet passage is an inlet for oil smoke to enter, and the upper end opening of the air outlet passage is an outlet for oil smoke to flow out; the upper part of the air outlet cover also has an annular bottom wall extending outward relative to the inner peripheral wall, and an outer peripheral wall extending upward from the outer peripheral edge of the annular bottom wall, an annular groove with the notch facing upward is formed between the outer peripheral wall, the annular bottom wall and the corresponding inner peripheral wall, and a through hole penetrating through the wall thickness is provided on the part of the inner peripheral wall corresponding to the annular groove to connect the annular groove with the air outlet passage;

[0007] The adapter ring has a side peripheral wall extending upward, the side peripheral wall defines a vertically penetrating adapter channel, and the lower end peripheral edge of the side peripheral wall is inserted into the annular groove through a notch;

[0008] Features:

[0009] The annular bottom wall is provided with a retaining rib protruding along the circumferential direction, the retaining rib is located between the inner peripheral wall and the outer peripheral wall, and is spaced and opposite to the inner peripheral wall and the outer peripheral wall, and a sealing ring is provided between the retaining rib and the outer peripheral wall, the lower end surface of the sealing ring is opposite to and fits with the annular bottom wall, and the upper end surface of the sealing ring is supported by the lower end periphery of the side peripheral wall;

[0010] It also includes a fastener connecting the adapter ring and the air outlet cover to press the lower end periphery of the side peripheral wall of the adapter ring downward onto the upper end surface of the sealing ring.

[0011] When in use, a step difference is formed between the baffle and the annular bottom wall, so that most of the oil flows into the air outlet channel of the air outlet hood through the through hole, and will not flow outward over the baffle, that is, the baffle blocks the oil from flowing outward, thus playing the role of the first line of defense against oil leakage; even if a part of the oil flows outward over the baffle, the sealing ring between the baffle and the outer peripheral wall can block the flow of the oil and play a better sealing role, thereby preventing the oil from leaking from the joint between the air outlet hood and the adapter ring.

[0012] Preferably, the upper end surface of the sealing ring is flush with the upper end surface of the retaining rib.

[0013] Preferably, the lower part of the side peripheral wall of the adapter ring is opposite to and in contact with the outer peripheral wall of the air outlet cover, thereby further preventing oil leakage.

[0014] In the above schemes, preferably, the lower part of the adapter ring has an annular flange extending outward from the side circumferential wall thereof, and the annular flange is provided with at least two vertically penetrating connection holes spaced apart in the circumferential direction;

[0015] The air outlet cover also has a flange extending outward from the upper edge of the outer peripheral wall;

[0016] The number of the fasteners is consistent with the number of the connecting holes, and each fastener is connected to the flange after passing through the corresponding connecting hole.

[0017] Preferably, under the action of the fastener, the upper surface of the flange is opposite to and fits with the lower surface of the annular flange. The fitted flange and annular flange can further improve the effect of preventing oil leakage.

[0018] Furthermore, the upper surface of the flange and the lower surface of the annular flange are respectively provided with circumferentially extending convex strips and grooves for the convex strips to be inserted into. The convex strips can play the role of blocking oil and improve the effect of preventing oil leakage.

[0019] Furthermore, the fastener is a screw, and the position of each connection hole on the flange is provided with a threaded hole adapted to the screw. In addition, the fastener can also be a screw and a nut, and the screw passes through the connection hole on the annular flange and the connection hole on the flange and is connected to the nut.

[0020] In the above-mentioned schemes, preferably, there are at least two through holes on the inner peripheral wall, and they are spaced apart along the circumferential direction.

[0021] Preferably, the lower edge of the through hole is located below the upper end surface of the retaining rib, so that most of the oil passes through the through hole under the blocking effect of the retaining rib and flows into the air outlet channel.

[0022] Preferably, the upper end of the side wall of the adapter ring is provided for the inlet end of the smoke exhaust pipe to butt thereon.

[0023] Compared with the prior art, the advantages of the utility model are: a step difference is formed between the baffle rib and the annular bottom wall in the utility model, so that most of the oil flows into the air outlet channel of the air outlet hood through the through hole, and will not flow outward over the baffle rib, that is, the baffle rib blocks the oil from flowing outward, and plays the role of the first line of defense against oil leakage; even if a part of the oil flows outward over the baffle rib, the sealing ring between the baffle rib and the outer peripheral wall can block the flow of the oil, and play a better sealing role, thereby preventing the oil from leaking from the joint between the air outlet hood and the adapter ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the range hood in the embodiment of the utility model;

[0025] Figure 2 This is a schematic diagram of the connection structure between the air outlet cover and the adapter ring in the embodiment of the utility model;

[0026] Figure 3 This is a cross-sectional view of the connection structure between the air outlet cover and the adapter ring in the embodiment of the utility model;

[0027] Figure 4 for Figure 3 Enlarged view of part A in the middle;

[0028] Figure 5 Another cross-sectional view of the connection structure between the air outlet cover and the adapter ring in the embodiment of the utility model;

[0029] Figure 6 for Figure 5 Enlarged view of middle part B;

[0030] Figure 7 It is a three-dimensional exploded view of the connection structure between the air outlet cover and the adapter ring in the embodiment of the utility model;

[0031] Figure 8 for Figure 7 Enlarged view of part C in the middle. DETAILED DESCRIPTION

[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0033] like Figures 1 to 8 As shown in FIG. 1 , a preferred embodiment of the connection structure between an air outlet cover and an adapter ring on a range hood of the utility model is shown. The connection structure includes an air outlet cover 1, an adapter ring 2, a sealing ring 3, and a fastener.

[0034] The air outlet cover 1 has an inner peripheral wall 11 extending upward, and the inner peripheral wall 11 defines an air outlet channel 10 that passes through from top to bottom. The lower end opening of the air outlet channel 10 is an inlet for oil smoke to enter, and the upper end opening of the air outlet channel 10 is an outlet for oil smoke to flow out; the upper part of the air outlet cover 1 also has an annular bottom wall 12 extending outward relative to the inner peripheral wall 11, an outer peripheral wall 13 extending upward from the outer peripheral edge of the annular bottom wall 12, and a flange 14 extending outward from the upper edge of the outer peripheral wall 13. An annular groove 120 with a notch facing upward is formed between the outer peripheral wall 13, the annular bottom wall 12 and the corresponding inner peripheral wall 11, and the inner peripheral wall 11 is provided with a flange 14 extending outward from the upper edge of the outer peripheral wall 13. The portion corresponding to the annular groove 120 is provided with a through hole 110 penetrating the wall thickness. There are multiple through holes 110, which are spaced apart along the circumferential direction to connect the annular groove 120 with the air outlet channel 10. The annular bottom wall 12 is provided with a convex retaining rib 121 along the circumferential direction. The retaining rib 121 is located between the inner circumferential wall 11 and the outer circumferential wall 13, and is spaced apart from the inner circumferential wall 11 and the outer circumferential wall 13. A sealing ring 3 is provided between the retaining rib 121 and the outer circumferential wall 13. The lower end face of the sealing ring 3 is opposite to and fits the annular bottom wall 12. The upper end face of the sealing ring 3 is flush with the upper side end face of the retaining rib 121 and is located above the lower edge of each through hole 110. Multiple threaded holes 142 are spaced apart along the circumferential direction on the flange 14, which are through from top to bottom.

[0035] The above-mentioned adapter ring 2 has a side wall 21 extending upward and an annular flange 22 extending horizontally outward from the lower part of the side wall 21. The side wall 21 defines a transfer channel 20 that passes through from top to bottom. The upper end of the side wall 21 is for the inlet end of the smoke exhaust pipe to dock thereon, and the lower end periphery of the side wall 21 is inserted into the annular groove 120 through a notch and supported on the upper end surface of the sealing ring 3. The lower part of the side wall 21 is opposite to and fits with the outer wall 13 of the air outlet hood 1, and the annular flange 22 is located above the flange 14, and the annular flange 22 is provided with connecting holes 220 that pass through from top to bottom at the positions corresponding to each threaded hole 142.

[0036] The above-mentioned fasteners are screws, and the number of them is consistent with the number of threaded holes 142. The rod of each screw passes through the corresponding connection hole 220 and is screwed into the threaded hole 142, so as to connect the adapter ring 2 and the air outlet cover 1 together, and press the lower end periphery of the side peripheral wall 21 of the adapter ring 2 downward on the upper end surface of the sealing ring 3. At this time, the upper surface of the flange 14 is opposite to and fits with the lower surface of the annular flange 22. At the same time, in this embodiment, the upper surface of the flange 14 is provided with a circumferentially extending convex strip 141, and the lower surface of the annular flange 22 is provided with a groove 221 for the convex strip 141 to be inserted therein. When the screw is tightened, the convex strip 141 is inserted into the groove 221.

[0037] In this embodiment, the installation positions of the air outlet cover and the adapter ring on the range hood are as follows: Figure 1 As shown, the connection structure of this embodiment forms three layers of oil leakage prevention:

[0038] The first barrier rib 121 forms a step difference with the annular bottom wall 12, so that most of the oil flows into the air outlet channel 10 of the air outlet cover 1 through the through hole 110, and does not flow outward over the barrier rib 121, that is, the barrier rib 121 blocks the oil from flowing outward, playing the role of the first barrier to prevent oil leakage;

[0039] The second is the sealing ring 3. Even if a part of the oil flows outward over the retaining rib 121, the sealing ring 3 between the retaining rib 121 and the outer peripheral wall 13 can block the flow of the oil and play a better sealing role.

[0040] The third layer is the convex strip 141. Even if a small amount of oil passes through the first two anti-leakage structures, the cooperation between the convex strip 141 and the groove 221 as the third anti-leakage structure can effectively prevent oil leakage.

[0041] Therefore, this embodiment can effectively prevent oil leakage through the three anti-oil leakage structures.

[0042] In the specification and claims of the present invention, terms indicating directions, such as "upper", "lower", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A connection structure between an air outlet cover and an adapter ring on a range hood, comprising: The air outlet cover (1) has an inner peripheral wall (11) extending upward, the inner peripheral wall (11) defines an air outlet channel (10) which passes through from top to bottom, the lower end opening of the air outlet channel (10) is an inlet for oil smoke to enter, and the upper end opening of the air outlet channel (10) is an outlet for oil smoke to flow out; the upper part of the air outlet cover (1) also has an annular bottom wall (12) extending outward relative to the inner peripheral wall (11), and an outer peripheral wall (13) extending upward from the outer peripheral edge of the annular bottom wall (12); an annular groove (120) with a notch facing upward is formed between the outer peripheral wall (13), the annular bottom wall (12) and the corresponding inner peripheral wall (11), and a through hole (110) penetrating the wall thickness is provided on the portion of the inner peripheral wall (11) corresponding to the annular groove (120) so as to connect the annular groove (120) with the air outlet channel (10); The adapter ring (2) has a side peripheral wall (21) extending upward, the side peripheral wall (21) defines an adapter channel (20) that passes through from top to bottom, and the lower end periphery of the side peripheral wall (21) is inserted into the annular groove (120) through a notch; Features: A retaining rib (121) is protruded along the circumferential direction on the annular bottom wall (12), the retaining rib (121) is located between the inner circumferential wall (11) and the outer circumferential wall (13), and is spaced and opposed to the inner circumferential wall (11) and the outer circumferential wall (13), and a sealing ring (3) is provided between the retaining rib (121) and the outer circumferential wall (13), the lower end surface of the sealing ring (3) is opposite to and in contact with the annular bottom wall (12), and the upper end surface of the sealing ring (3) is supported by the lower end periphery of the side circumferential wall (21); It also includes a fastener that connects the adapter ring (2) and the air outlet cover (1) to press the lower end periphery of the side peripheral wall (21) of the adapter ring (2) downward onto the upper end surface of the sealing ring (3).

2. The connection structure according to claim 1, characterized in that: The upper end surface of the sealing ring (3) is flush with the upper end surface of the retaining rib (121).

3. The connection structure according to claim 1, characterized in that: The lower portion of the side peripheral wall (21) of the adapter ring (2) is opposite to and in contact with the outer peripheral wall (13) of the air outlet cover (1).

4. The connection structure according to any one of claims 1 to 3, characterized in that: The lower part of the adapter ring (2) has an annular flange (22) extending outward from the side circumferential wall (21) thereof, and the annular flange (22) is provided with at least two vertically penetrating connection holes (220) spaced apart in the circumferential direction; The air outlet cover (1) further comprises a flange (14) extending outward from the upper edge of the outer peripheral wall (13); The number of the fasteners is consistent with the number of the connection holes (220), and each fastener passes through a corresponding connection hole (220) and is connected to the flange (14).

5. The connection structure according to claim 4, characterized in that: Under the action of the fastener, the upper surface of the flange (14) is opposite to and fits with the lower surface of the annular flange (22).

6. The connection structure according to claim 5, characterized in that: The upper surface of the flange (14) and the lower surface of the annular flange (22) are respectively provided with a circumferentially extending convex strip (141) and a groove (221) into which the convex strip (141) is inserted.

7. The connection structure according to claim 4, characterized in that: The fasteners are screws, and threaded holes (142) adapted to the screws are provided at positions on the flanges (14) corresponding to the connection holes (220).

8. The connection structure according to any one of claims 1 to 3, characterized in that: There are at least two through holes (110) on the inner peripheral wall (11), which are spaced apart and distributed along the circumferential direction.

9. The connection structure according to claim 8, characterized in that: The lower edge of the through hole (110) is located below the upper end surface of the retaining rib (121).

10. The connection structure according to any one of claims 1 to 3, characterized in that: The upper end of the side peripheral wall (21) of the adapter ring (2) is provided for the inlet end of the smoke exhaust pipe to butt thereon.

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