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, and further comprises a check valve, a buckle is arranged on the upper portion of the inner circumferential wall of the cover body in an inward protruding mode, clamping grooves distributed in the circumferential direction are formed in the outer circumferential wall of the connecting ring, a guide structure is arranged on the outer circumferential wall of the connecting ring, and the guide structure is connected to the lower portions of the clamping grooves. And the buckle is clamped into the clamping groove through the guide structure. The air outlet cover of the range hood has the advantages that the buckles are arranged on the upper portion of the inner circumferential wall of the cover body of the air outlet cover of the range hood in the inward protruding mode, the clamping grooves distributed in the circumferential direction are formed in the outer circumferential wall of the connecting ring, the guide structures on the outer circumferential wall of the connecting ring are connected below the clamping grooves, the buckles are clamped into the clamping grooves through the guide structures, assembly is convenient, and the service life of the air outlet cover is prolonged. The air outlet cover and the connecting ring are fixed through a buckle and clamping groove matching structure, screw fixation is not needed, no guide structure exists during disassembly, the connecting ring can be separated from the air outlet cover by applying certain external force to the connecting ring, and disassembly is very convenient.

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 cover of a range hood with a buckle and a slot matching structure between the cover body and the connecting ring, which does not need to be fixed with screws, 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: an air outlet hood of a range hood, comprising a hood body and a connecting ring installed on the top of the hood body, and also comprising a check valve, characterized in that: a buckle is protruding inwardly from the upper part of the inner circumferential wall of the hood body, and a circumferentially distributed clamping groove is provided on the outer circumferential wall of the connecting ring. The outer circumferential wall of the connecting ring has a guide structure, and the guide structure is connected to the bottom of the clamping groove, and the buckle is clamped into the clamping groove through the guide structure.

[0005] The guide structure can have various forms, and preferably, the guide structure is a guide slope that is arranged obliquely inward from top to bottom. In this way, when the adapter ring is placed on the cover from top to bottom, the buckle can be smoothly inserted into the card slot along the guide slope.

[0006] Preferably, the bottom surface of the card slot is inclined downward from the inside to the outside.

[0007] Preferably, the overlap size of the buckle and the slot in the radial direction is 1.5-2 mm. The size of the overlap size depends on the external force required to be applied to the connecting ring for the connecting ring to be detached from the air outlet cover. The larger the size, the greater the external force required for detachment.

[0008] More preferably, there is a gap between the bottom of the buckle and the bottom of the slot, and the size of the gap is 0.1-0.2 mm. The gap is used to control the gap between the connecting ring and the sealing surface on the air outlet cover.

[0009] Preferably, the connecting ring has an upper connecting part and a lower connecting part, the diameter of the upper connecting part is larger than the diameter of the lower connecting part, and the clamping groove is arranged at the bottom of the upper connecting part.

[0010] In order to make the assembly structure of the connecting ring and the cover body more secure, there are at least three buckles that are evenly distributed along the circumference.

[0011] In order to prevent oil leakage, the cover body and the connecting ring have sealing surfaces that cooperate with each other.

[0012] Further preferably, the sealing surface comprises 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.

[0013] Further preferably, an oil drain port is opened inside the cover body, and the oil creeping gap is connected to the oil drain port.

[0014] In order to make the position distribution of the buckle and the oil drain port more reasonable, the oil drain port corresponds to the buckle one by one, and the oil drain port is arranged below the corresponding buckle.

[0015] In order to make the air outlet cover have a check function, preferably, it also includes a check valve, which is installed inside the connecting ring.

[0016] As a preferred embodiment of any of the above solutions, a limiting ring is installed on the top of the connecting ring, and an adapter ring for installing the smoke pipe is installed between the limiting ring and the connecting ring. Whether to use the adapter ring can be selected according to the diameter of the smoke pipe.

[0017] Compared with the prior art, the advantages of the utility model are: a buckle is protruding inwardly on the upper inner wall of the air outlet hood of the range hood, a circumferentially distributed snap groove is provided on the outer wall of the connecting ring, the guide structure of the outer wall of the connecting ring is connected to the bottom of the snap groove, the buckle is inserted into the snap groove through the guide structure, and the air outlet hood and the connecting ring are fixed with the buckle and the snap groove matching structure, and no screws are required. There is no guide structure during disassembly, and the connecting ring can be detached from the air outlet hood by applying a certain external force on the connecting ring, and the disassembly is also very convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the air outlet cover of an embodiment of the utility model;

[0019] Figure 2 for Figure 1 An exploded schematic diagram of the wind shield is shown;

[0020] Figure 3 This is a front view of the connection ring of the air outlet cover of the embodiment of the utility model;

[0021] Figure 4 A top view of the cover body of the air outlet cover according to an embodiment of the utility model;

[0022] Figure 5 A cross-sectional view of the air outlet cover assembly structure of an embodiment of the utility model;

[0023] Figure 6 for Figure 5 A magnified schematic diagram of part A;

[0024] Figure 7 A cross-sectional view of another assembly structure of the air outlet cover according to an embodiment of the utility model;

[0025] Figure 8 for Figure 7 Schematic diagram of the enlarged portion B. DETAILED DESCRIPTION

[0026] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0027] like Figures 1 to 8 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 and a limiting ring 4, wherein 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, and the limiting ring 4 is installed on the top of the connecting ring 2. In addition, an adapter ring (not shown in the figure) can be installed between the limiting ring 4 and the connecting ring 2. The adapter ring 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.

[0028] The upper part of the inner peripheral wall of the cover body 1 is provided with buckles 11 protruding inwardly. In this embodiment, there are 4 buckles 11 and they are evenly distributed along the circumferential interval. The connecting ring 2 has an upper connecting part 23 and a lower connecting part 24. The diameter of the upper connecting part 23 is larger than that of the lower connecting part 24. The outer peripheral wall of the lower connecting part 24 is provided with circumferentially distributed card slots 21, and the card slots 21 are arranged at the bottom of the upper connecting part 23. The outer peripheral wall of the connecting ring 2 has a guide slope 22 that is inclined inwardly from top to bottom. The guide slope 22 constitutes a guide structure. The guide slope 22 is connected to the bottom of the card slot 21. The buckle 11 is inserted into the card slot 21 through the guide slope 22.

[0029] In this embodiment, the bottom surface of the card slot 21 is inclined downward from the inside to the outside. The overlapping dimension d between the buckle 11 and the card slot 21 in the radial direction is 1.5-2 mm. The size of the overlapping dimension depends on the external force required to be applied to the connecting ring so that the connecting ring can be removed from the air outlet cover. The larger the dimension, the greater the external force required for the connection ring to be removed. There is a gap between the bottom of the buckle 11 and the bottom surface of the card slot 21, and the gap size is 0.1-0.2 mm. The gap is used to control the gap between the connecting ring and the sealing surface on the air outlet cover.

[0030] In addition, in order to prevent oil leakage, the cover body 1 and the connecting ring 2 have mutually matched sealing surfaces, specifically, the sealing surfaces include an upper sealing surface 6 and a lower sealing surface 7, an oil creeping gap 7 is formed between the upper sealing surface 5 and the lower sealing surface 6, and the height difference between the upper sealing surface 5 and the lower sealing surface 6 constitutes the oil creeping height. After setting a reasonable oil creeping gap 7, it can effectively prevent oil from seeping from the lower sealing surface 6 to the upper sealing surface 7 and overflowing. Usually, the oil creeping gap is designed to be greater than 5mm, and the oil creeping height is designed to be greater than 25mm.

[0031] An oil drain port 12 is opened inside the cover body 1 . In this embodiment, there are four oil drain ports 12 which are arranged below the corresponding buckles 11 . The oil creeping gap 7 is connected to the oil drain port 12 .

[0032] 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 buckle (11) is protruding inwardly on the upper portion of the inner peripheral wall of the cover body (1); a circumferentially distributed clamping groove (21) is provided on the outer peripheral wall of the connecting ring (2); the outer peripheral wall of the connecting ring (2) has a guide structure, the guide structure is connected to the bottom of the clamping groove (21), and the buckle (11) is clamped into the clamping groove (21) through the guide structure.

2. The air outlet cover of the range hood according to claim 1, characterized in that: The guide structure is a guide slope (22) arranged obliquely from top to bottom and inwardly.

3. The air outlet cover of the range hood according to claim 1, characterized in that: The bottom surface of the slot (21) is inclined downward from the inside to the outside.

4. The air outlet cover of the range hood according to claim 1, characterized in that: The overlapping dimension between the buckle (11) and the slot (21) in the radial direction is 1.5 to 2 mm.

5. The air outlet cover of the range hood according to claim 1, characterized in that: There is a gap between the bottom of the buckle (11) and the bottom surface of the slot (21), and the size of the gap is 0.1-0.2 mm.

6. The air outlet cover of the range hood according to claim 1, characterized in that: The connecting ring (2) comprises an upper connecting portion (23) and a lower connecting portion (24); the diameter of the upper connecting portion (23) is larger than the diameter of the lower connecting portion (24); and the clamping groove (21) is arranged at the bottom of the upper connecting portion (23).

7. The air outlet cover of the range hood according to claim 1, characterized in that: There are at least three buckles (11) which are evenly distributed along the circumference.

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

9. The air outlet cover of the range hood according to claim 8, characterized in that: The sealing surface comprises an upper sealing surface (5) and a lower sealing surface (6), and an oil creeping gap (7) is formed between the upper sealing surface (5) and the lower sealing surface (6).

10. The air outlet cover of the range hood according to claim 9, characterized in that: An oil drain port (12) is provided inside the cover body (1), and the oil creeping gap (7) is connected to the oil drain port (12).

11. The air outlet cover of the range hood according to claim 10, characterized in that: The oil discharge port (12) corresponds to the buckle (11) one by one, and the oil discharge port (12) is arranged below the corresponding buckle (11).

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

13. The air outlet cover of a range hood according to any one of claims 1 to 12, characterized in that: A limiting ring (4) is installed on the top of the connecting ring (2), and an adapter ring for installing a smoke pipe is installed between the limiting ring (4) and the connecting ring (2).

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