Air outlet cover of range hood

Abstract

An air outlet cover of a range hood comprises a cover body and a connecting ring installed at the top of the cover body, locking buckles are inwards arranged on the upper portion of the inner circumferential wall of the cover body in a protruding mode and distributed at intervals in the circumferential direction of the inner circumferential wall of the cover body, clamping buckles matched with the locking buckles are arranged on the outer circumferential wall of the connecting ring, and the connecting ring is matched with the cover body in a rotating and locking mode. The buckle is provided with an anti-loose convex rib and a limiting rib, the anti-loose convex rib is arranged on the front side of the limiting rib in the clamping-in direction of the buckle, the locking buckle is provided with an anti-loose blocking rib, and the anti-loose blocking rib is limited between the anti-loose convex rib and the limiting rib in the state that the connecting ring and the cover body are assembled. The connecting ring and the cover body of the air outlet cover adopt a rotary locking matching structure, screw fixation is not needed, after-sale installation and disassembly are convenient, when the connecting ring is rotated and fixed in place, the limiting rib of the connecting ring makes contact with the front end of the air outlet cover locking buckle, the connecting ring is prevented from further rotating, and the air outlet cover anti-loosening blocking rib is located between the connecting ring limiting rib and the connecting ring anti-loosening convex rib, so that the connecting ring is prevented from loosening. And the connecting ring is prevented from anticlockwise rotating and loosening under the action of small external force.

Description

Technical Field

[0001] The utility model relates to an air outlet hood, in particular to an air outlet hood of a range hood. Background Art

[0002] At present, the public flue is generally used in the buildings where families live. The oil smoke exhausted by the range hood of each household enters the public flue from the range hood and is discharged from the top of the house. If the air outlet of the range hood is not sealed tightly, the oil smoke of the lower-level users will enter the room of the upper-level residents during the exhaust process, or when there is a strong wind or low air pressure, the oil smoke exhausted by the upper-level residents will enter the house from the exhaust port of the range hood of the lower-level residents, thereby causing the phenomenon of air and smoke interflow between the airways. For this reason, the air outlet hood of the existing range hood is equipped with a check valve. The existing air outlet hood specifically includes a hood body, a connecting ring, a valve installation shaft and a check valve. The connecting ring includes a mounting portion and a smoke pipe connecting portion arranged above the mounting portion. The lower end of the mounting portion extends into the hood body and is fixed on the hood body. The smoke pipe connecting portion is used to install the smoke pipe, and the check valve is installed on the valve installation shaft. The valve plate just covers the air outlet of the range hood when it is closed. When the range hood is working, the valve plate opens the air outlet to discharge air. When the range hood is not working, the blades close by their own weight, and the valve plate is placed on the cover body to form a seal, thereby preventing the oil smoke in the public flue outside the air outlet from flowing back. When installing the smoke pipe on the current range hood, the smoke pipe is first fixed with two screws, and then wrapped with sealing tape to seal. When screwing in the screws, there is no operating space due to the obstruction of the user's cabinet. The installation master can only find two positions to drill holes and fix them, which is inconsistent with the designed screw fixing position, and there is a risk of falling off and oil leakage; the mating surface of the air outlet hood and the connecting ring adopts an interference fit. Due to the siphon effect, the oil will climb to the outside of the air outlet hood along the fitting gap, resulting in oil leakage. In summary, the existing air outlet hood structure of the range hood needs to be further improved. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an air outlet hood of a range hood in which a hood body and a connecting ring are fixed by rotation locking and provided with an anti-loosening structure in view of the above-mentioned existing technical status.

[0004] The technical solution adopted by the utility model to solve the above-mentioned technical problems is as follows: the air outlet hood of the range hood comprises a hood body and a connecting ring installed on the top of the hood body, and is characterized in that: a locking buckle is protruded inwardly from the upper part of the inner circumferential wall of the hood body, and the locking buckles are circumferentially spaced along the inner circumferential wall of the hood body; a buckle matched with the locking buckle is provided on the outer circumferential wall of the connecting ring; the connecting ring is rotationally locked with the hood body, the buckle has an anti-loosening rib and a limiting rib, and along the snap-in direction of the buckle, the anti-loosening rib is arranged on the front side of the limiting rib, and the locking buckle has an anti-loosening blocking rib, and when the connecting ring and the hood body are assembled, the anti-loosening blocking rib is limited between the anti-loosening rib and the limiting rib.

[0005] Preferably, the bottom of the locking buckle is provided with the anti-loosening retaining rib protruding downwards, and during the assembly of the connecting ring, the anti-loosening retaining rib crosses the anti-loosening convex rib and is limited between the anti-loosening convex rib and the limiting rib. Therefore, after the assembly is completed, the anti-loosening retaining rib is limited between the anti-loosening convex rib and the limiting rib to form an anti-loosening structure, which can prevent the connecting ring from loosening under the action of a small external force.

[0006] In order to enable the locking buckle to be inserted into the connecting ring, the connecting ring has a lower connecting part and an upper connecting part, the diameter of the upper connecting part is larger than the diameter of the lower connecting part, the buckles are spaced apart on the outer peripheral wall of the lower connecting part, and a slot is formed between the buckle and the bottom of the upper connecting part. When the connecting ring and the cover body are assembled, the locking buckle is inserted into the slot.

[0007] In order to facilitate the air outlet cover locking buckle to rotate smoothly into the buckle of the connecting ring, a guide structure is provided at the front end of the buckle to facilitate the locking buckle to be inserted.

[0008] In order to gradually lock the connection ring during the rotation process, the top of the buckle is a sloped surface that slopes downward from the inside to the outside, and the width of the locking buckle gradually widens along the rotation direction of the connection ring. During the assembly of the connection ring, the gap between the locking buckle and the sloped surface gradually becomes smaller. Therefore, when the connection ring is rotated and locked in place, an interference fit is achieved between the buckle and the locking buckle, making the locking structure more secure.

[0009] Further preferably, the cover body and the connecting ring have sealing surfaces that cooperate with each other.

[0010] In order to prevent oil leakage, the sealing surface includes an upper sealing surface and a lower sealing surface, and an oil creeping gap is formed between the upper sealing surface and the lower sealing surface. Such an arrangement can prevent oil from seeping from the lower sealing surface to the upper sealing surface and overflowing.

[0011] Further preferably, an oil drain port is opened inside the cover body, and the oil creeping gap is connected to the oil drain port.

[0012] In order to make the position distribution of the locking buckle and the oil drain port more reasonable, the oil drain port corresponds to the locking buckle one by one, and the oil drain port is arranged below the corresponding locking buckle.

[0013] In order to facilitate the fast insertion of the locking buckles into the slots when the connecting ring is in different installation positions, the number of the buckles is greater than the number of the locking buckles, and the buckles are evenly distributed along the outer peripheral wall of the connecting ring, and the locking buckles are evenly distributed along the circumference of the cover body.

[0014] In order to realize the non-return function, preferably, the air outlet cover further includes a non-return valve, and the non-return valve is installed inside the connecting ring.

[0015] In order to facilitate the connection with different sized small smoke pipes, a limit ring is installed on the top of the connecting ring, and a switching ring for installing the smoke pipe is installed between the limit ring and the connecting ring. For larger smoke pipes, the switching ring can be omitted and the smoke pipe can be directly fixed on the limit ring.

[0016] Compared with the prior art, the advantages of the utility model are: a locking buckle is protruding inwardly on the upper inner peripheral wall of the air outlet hood of the range hood, and a buckle matching the locking buckle is provided on the outer peripheral wall of the connecting ring. The connecting ring and the hood adopt a rotating locking matching structure, which does not require screws to fix, and is convenient for after-sales installation and disassembly. When the connecting ring is rotated and fixed in place, the limiting rib of the connecting ring contacts the front end of the locking buckle of the air outlet hood to prevent the connecting ring from further rotation. The anti-loosening rib of the air outlet hood is located between the limiting rib of the connecting ring and the anti-loosening convex rib of the connecting ring, preventing the connecting ring from loosening when it rotates counterclockwise under the action of a small external force, that is, a large force is required for counterclockwise disassembly so that the connecting ring can fall off the hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the air outlet cover of an embodiment of the utility model;

[0018] Figure 2 for Figure 1 An exploded schematic diagram of the wind shield is shown;

[0019] Figure 3 This is a front view of the connection ring of the air outlet cover of the embodiment of the utility model;

[0020] Figure 4 for Figure 3 A magnified schematic diagram of part A;

[0021] Figure 5 A top view of the cover body of the air outlet cover according to an embodiment of the utility model;

[0022] Figure 6 A cross-sectional view of the air outlet cover assembly structure of an embodiment of the utility model;

[0023] Figure 7 for Figure 6 A magnified schematic diagram of part B;

[0024] Figure 8 This is a structural cross-sectional view of the air outlet cover of the embodiment of the utility model in the initial assembly state;

[0025] Fig. 9 for Figure 8 A magnified schematic diagram of part C;

[0026] Fig.10 This is a structural cross-sectional view of the air outlet cover of the embodiment of the utility model in a fully assembled state;

[0027] Fig.11 for Fig.10 The enlarged schematic diagram of the D part;

[0028] Fig.12 Another structural cross-sectional view of the air outlet cover of the utility model embodiment in a fully assembled state;

[0029] Fig.13 for Fig.12 Enlarged schematic diagram of part E in the middle. DETAILED DESCRIPTION

[0030] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0031] like Figures 1 to 5 As shown, the air outlet hood of the range hood of this embodiment includes a hood body 1, a connecting ring 2, a check valve 3, a limiting ring 4 and an adapter ring 5, the lower part of the connecting ring 2 is installed on the hood body 1, the check valve 3 is installed inside the connecting ring 2, the limiting ring 4 is installed on the top of the connecting ring 2, and the adapter ring 5 is installed between the limiting ring 4 and the connecting ring 2. The adapter ring 5 is an optional part. For a larger smoke pipe, the adapter ring can be omitted, and the smoke pipe is directly fixed on the limiting ring 4. For a smaller smoke pipe, the smoke pipe is fixed on the adapter ring 5.

[0032] A locking buckle 11 is protruded inwardly from the upper portion of the inner peripheral wall of the cover body 1. The locking buckles 11 are circumferentially spaced along the inner peripheral wall of the cover body 1. In this embodiment, there are four locking buckles 11 and they are evenly spaced circumferentially. An oil drain port 12 is opened inside the cover body 1. There are also four oil drain ports 12 and they are correspondingly arranged below the locking port 11.

[0033] The connection ring 2 of this embodiment has a lower connection part 22 and an upper connection part 23, and the diameter of the upper connection part 23 is larger than the diameter of the lower connection part 22. A buckle 21 matching with the locking buckle 11 is provided on the outer peripheral wall of the lower connection part 22. The number of buckles 21 is greater than the number of locking buckles 11, and the buckles 21 are evenly distributed along the outer peripheral wall of the connection ring 2. There are 12 buckles 21 in this embodiment. After multiple buckles 21 are provided, the connection ring 2 can be quickly rotated and assembled on the cover body 1 when it is in multiple different positions, and the installation is more convenient.

[0034] like Figures 8 to 13 As shown, the connection ring 2 and the cover body 1 are rotated and locked to Figure 8 The direction indicated by the middle arrow F is clockwise. When installing, the connecting ring 2 rotates clockwise relative to the cover body 1. When disassembling, the connecting ring 2 rotates counterclockwise relative to the cover body 1. In the clockwise rotation direction of the connecting ring 2, the rear end of the buckle 21 has an anti-loosening rib 211 and a limiting rib 212, and the anti-loosening rib 211 is arranged on the front side of the limiting rib 212. The front end of the buckle 21 is provided with a guide structure 213 for facilitating the locking buckle 11 to be inserted. The guide structure 213 of this embodiment is a guide slope, and a card slot 24 is formed between the buckle 21 and the bottom of the upper connecting part 23. An anti-loosening rib 111 is provided at the bottom of the locking buckle 11. Figure 8 and Fig. 9 As shown, at the beginning of the assembly of the connection ring 2, the locking buckle 11 of the cover body 1 is located outside the buckle 21 of the connection ring 2. During the assembly process, the connection ring 2 rotates clockwise relative to the cover body 1, the locking buckle 11 enters the card slot 24, and the anti-loosening retaining rib 111 of the locking opening 11 crosses the anti-loosening convex rib 211. After the assembly is completed, the anti-loosening retaining rib 111 is limited between the anti-loosening convex rib 211 and the limiting rib 212 to prevent the connection ring 2 from rotating counterclockwise and loosening under a small external force. When disassembling counterclockwise, a large force is required for the connection ring 2 to come off the cover body 1. The limiting rib 212 contacts the front end of the locking buckle 11 to prevent the connection ring 2 from rotating further.

[0035] In this embodiment, the top of the buckle 21 is a slope surface 214 that slopes downward from the inside to the outside, and the width of the locking buckle 11 gradually widens along the rotation direction of the connecting ring 2. It can be seen that during the assembly process of the connecting ring 2, the gap between the locking buckle 11 and the slope surface 214 gradually becomes smaller. When the connecting ring 2 is rotated and locked into place, an interference fit is achieved between the buckle 21 and the locking buckle 11, making the locking structure more secure.

[0036] like Figure 6 and Figure 7As shown, the cover body 1 and the connecting ring 2 have mutually matching sealing surfaces, which specifically include an upper sealing surface 6 and a lower sealing surface 7. An oil creeping gap 8 is formed between the upper sealing surface 6 and the lower sealing surface 7. The oil creeping gap 8 is connected to the oil discharge port 12, and the oil creeping gap forms an oil flow channel. The oil creeping gap is designed to be greater than 5 mm, and the oil creeping height is designed to be greater than 25 mm, which can effectively prevent oil from seeping from the lower sealing surface 6 to the upper sealing surface 7 and overflowing.

[0037] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "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, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. An air outlet cover of a range hood, comprising a cover body (1) and a connecting ring (2) mounted on the top of the cover body (1), characterized in that: A locking buckle (11) is protruding inwardly from the upper portion of the inner peripheral wall of the cover body (1). The locking buckles (11) are circumferentially spaced and distributed along the inner peripheral wall of the cover body (1). A buckle (21) matching with the locking buckle (11) is provided on the outer peripheral wall of the connecting ring (2). The connecting ring (2) and the cover body (1) are rotationally locked and matched. The buckle (21) has an anti-loosening convex rib (211) and a limiting rib (212). Along the snap-in direction of the buckle (21), the anti-loosening convex rib (211) is arranged on the front side of the limiting rib (212). The locking buckle (11) has an anti-loosening blocking rib (111). When the connecting ring (2) and the cover body (1) are assembled, the anti-loosening blocking rib (111) is limited between the anti-loosening convex rib (211) and the limiting rib (212).

2. The air outlet cover according to claim 1, characterized in that: The bottom of the locking buckle (11) is provided with the anti-loosening retaining rib (111) protruding downwards. During the assembly of the connecting ring (2), the anti-loosening retaining rib (111) crosses over the anti-loosening convex rib (211) and is limited between the anti-loosening convex rib (211) and the limiting rib (212).

3. The air outlet cover according to claim 1, characterized in that: The connecting ring (2) comprises a lower connecting portion (22) and an upper connecting portion (23); the caliber of the upper connecting portion (23) is larger than the caliber of the lower connecting portion (22); the buckles (21) are distributed at intervals on the outer peripheral wall of the lower connecting portion (22); a clamping groove (24) is formed between the buckles (21) and the bottom of the upper connecting portion (23); when the connecting ring (2) and the cover body (1) are assembled, the locking buckle (11) is clamped into the clamping groove (24).

4. The air outlet cover according to claim 1, characterized in that: The front end of the buckle (21) is provided with a guide structure (213) for facilitating the locking buckle (11) to be locked in.

5. The air outlet cover according to claim 1, characterized in that: The top of the buckle (21) is a slope surface (214) that slopes downward from the inside to the outside, and the width of the locking buckle (11) gradually widens along the rotation direction of the connecting ring (2). During the assembly process of the connecting ring (2), the gap between the locking buckle (11) and the slope surface (214) gradually becomes smaller.

6. The air outlet cover according to claim 1, characterized in that: The cover body (1) and the connecting ring (2) have mutually matching sealing surfaces.

7. The air outlet cover according to claim 6, characterized in that: The sealing surface comprises an upper sealing surface (6) and a lower sealing surface (7), and an oil creeping gap (8) is formed between the upper sealing surface (6) and the lower sealing surface (7).

8. The air outlet cover according to claim 7, characterized in that: An oil drain port (12) is provided inside the cover body (1), and the oil creeping gap (8) is connected to the oil drain port (12).

9. The air outlet cover according to claim 8, characterized in that: The oil discharge port (12) corresponds to the locking buckle (11) one by one, and the oil discharge port (12) is arranged below the corresponding locking buckle (11).

10. The air outlet cover according to any one of claims 1 to 9, characterized in that: The number of the buckles (21) is greater than the number of the locking buckles (11), and the buckles (21) are evenly distributed along the outer peripheral wall of the connecting ring (2), and the locking buckles (11) are evenly distributed along the circumference of the cover body (1).

11. The air outlet cover according to claim 1, characterized in that: It also includes a check valve (3), which is installed inside the connecting ring (2).

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