Air outlet cover for range hood and range hood

Abstract

The utility model relates to a range hood and an air outlet cover for the range hood, the air outlet cover comprises: a cover body, which is provided with an air inlet and an air outlet, and the air inlet is used for being connected with a fan of the range hood; the connecting ring is in butt joint with the air outlet of the cover body and is used for being connected with an external air outlet smoke pipe; a first connecting part extending outwards is arranged at the position, close to the air outlet of the cover body, of the cover body, an annular mounting groove is formed in the top of the first connecting part, and a second connecting part capable of being detachably inserted into the annular mounting groove is arranged at the position, in butt joint with the air outlet of the cover body, of the connecting ring. And a sealing piece in sealing contact with the second connecting part and the annular mounting groove is arranged between the second connecting part and the inner wall of the annular mounting groove. The air outlet cover has the advantages that the sealing effect can be effectively improved, and the oil leakage problem is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, in particular to an air outlet hood for a range hood and a range hood. Background Art

[0002] A range hood is a kitchen appliance for purifying the kitchen environment, which is used to quickly extract and discharge the waste generated by stove combustion and the harmful fumes generated during cooking outdoors, so as to purify the kitchen air. The air outlet hood of the range hood is a component for connecting the fan outlet of the range hood with the air outlet pipe (smoke outlet pipe). The main function of the air outlet hood is to rectify the air flow in the volute, moderately decelerate and pressurize it, and then transport it to the common flue or outdoors through the air outlet pipe.

[0003] For example, the Chinese utility model patent application with the application number CN202121230268.6 (publication number CN215832004U) discloses "An air outlet hood for a range hood". The air outlet hood includes: a hood body having an air inlet and an air outlet, and the air inlet is used to connect with the fan; a connecting ring provided at the air outlet of the hood body for connecting with the smoke outlet pipe; the air outlet of the hood body has an outer ring wall, and the connecting ring is detachably connected to the outer ring wall of the hood body. A locking sleeve that can rotate circumferentially along the outer ring wall and move axially along the outer ring wall is sleeved on the outer peripheral surface of the outer ring wall. A limiting stop edge protruding radially inward is provided on the inner peripheral surface of the locking sleeve, and a second limiting stop edge protruding radially outward is provided on the outer peripheral surface of the connecting ring. The end of the connecting ring is arranged inside the outer ring wall, and the locking sleeve presses the second limiting stop edge of the connecting ring against the end of the outer ring wall through the limiting stop edge.

[0004] However, there are still certain deficiencies in the air outlet hood in the above patent application. After the connecting ring of the air outlet hood is connected to the hood body, it is generally sealed with tape. The sealing performance of this structure is poor, and oil is likely to accumulate at the gap between the two connection positions. Because the kinematic viscosity of the oil is relatively large, it is not easy for all the accumulated oil to flow out through the oil leakage holes. Moreover, the pressure at the air outlet position is relatively high, and during operation, the accumulated oil is likely to be pressed out from the gap under the static pressure, resulting in an oil leakage phenomenon.

[0005] Therefore, the existing range hoods still need to be further improved. Summary of the Utility Model

[0006] The first technical problem to be solved by the utility model is to provide an air outlet hood for a range hood that can effectively improve the sealing effect and reduce the oil leakage problem in view of the current situation of the prior art.

[0007] The second technical problem to be solved by the utility model is to provide a range hood applying the above air outlet hood in view of the current situation of the prior art.

[0008] The technical solution adopted by the utility model to solve the first technical problem is: an air outlet cover for a range hood, comprising:

[0009] The cover body has an air inlet and an air outlet, wherein the air inlet is used to be connected to the fan of the range hood;

[0010] A connecting ring, connected to the air outlet of the cover body, for connecting to an external air outlet pipe;

[0011] The cover body has a first connecting portion extending outwardly near its air outlet, and an annular mounting groove is provided on the top of the first connecting portion. The connecting ring has a second connecting portion that can be detachably inserted into the annular mounting groove at a position corresponding to the air outlet of the above-mentioned cover body, and a sealing member is provided between the second connecting portion and the inner wall of the annular mounting groove to seal the two.

[0012] Since oil easily accumulates at the bottom of the annular mounting groove, in order to prevent oil from leaking out from there, the sealing member includes a first sealing ring which is pressed between the bottom of the second connecting portion and the bottom wall of the annular mounting groove.

[0013] In order to improve the sealing performance of the first sealing ring, the first sealing ring includes a sealing ring body and a first leg and a second leg located at the bottom of the sealing ring body and spaced apart in the radial direction, the second connecting portion abuts against the top of the sealing ring body, and the first leg and the second leg are both in contact with the bottom wall of the annular mounting groove. When the first sealing ring is compressed, it deforms, and its first leg and the second leg abut against the bottom wall of the annular mounting groove and maintain a certain pressing force, which effectively improves the sealing effect.

[0014] In order to make the force application angle of the second connection part on the first sealing ring more reasonable, the second connection part includes a first annular wall and a second annular wall spaced apart in the radial direction of the connection ring, and the first annular wall and the second annular wall respectively abut against the positions corresponding to the first leg and the second leg on the top surface of the sealing ring body. The first annular wall and the second annular wall spaced apart also allow the second connection part as a whole to have a certain elastic deformation space in the radial direction, which facilitates its installation into the annular installation groove of the cover body, and after being installed in place, it can be reset to maintain a certain pressing force (on the side wall of the annular installation groove), further improving the sealing effect.

[0015] In order to further improve the sealing between the cover body and the connecting ring, the sealing member further includes a second sealing ring, which is pressed between the side wall of the annular mounting groove and the outer wall of the second connecting portion.

[0016] In order to prevent the second sealing ring from falling off, a limiting groove for embedding and installing the second sealing ring is opened on the side wall of the annular installation groove.

[0017] Generally, the second sealing ring can be arranged on the side wall at the inner position of the annular mounting groove, or on the side wall at the outer position of the annular mounting groove, or second sealing rings are arranged on both the inner and outer side walls. Preferably, the second connecting portion includes a first annular wall and a second annular wall that are spaced apart in the radial direction of the connecting ring, and the second annular wall is located outside the first annular wall. The limiting groove is formed on the side wall of the annular mounting groove opposite to the outer wall of the second annular wall.

[0018] Considering that after the second sealing ring is installed in place, it will protrude a part relative to the inner wall surface of the annular mounting groove, and there is a certain resistance when the second connecting portion is installed. In order to conveniently insert the second connecting portion of the connecting ring into the annular mounting groove of the cover body, the outer side of the lower edge of the second annular wall has a guiding inclined surface that inclines inwards from top to bottom.

[0019] The connecting ring and the cover body can be locked in the circumferential direction through a buckle structure, or can be axially locked and connected through an external locking component. Preferably, a locking sleeve that can rotate circumferentially and move axially is sleeved on the outer peripheral wall of the first connecting portion. The inner peripheral wall of the locking sleeve has a limiting retaining edge that protrudes radially inwards. The outer peripheral wall of the connecting ring has an annular pressing portion that protrudes radially outwards at a position adjacent to its second connecting portion. The locking sleeve presses the annular pressing portion of the connecting ring against the first connecting portion of the cover body through the limiting retaining edge.

[0020] As an improvement, the outer peripheral wall of the first connecting portion has a first limiting rib arranged in a spiral pattern along its circumference, and the inner peripheral surface of the locking sleeve has a second limiting rib arranged in a spiral pattern along its circumference. The locking sleeve is constrained on the first connecting portion through the limiting cooperation between the first limiting rib and the second limiting rib.

[0021] In order to ensure reliable and stable locking between the connecting ring and the cover body, the first limiting rib has multiple segments arranged in sequence along the circumference of the first connecting portion, and the second limiting rib also has multiple segments arranged in sequence along the circumference of the locking sleeve.

[0022] The technical solution adopted by the present utility model to solve the second technical problem is: an oil fume extractor, including a machine shell and a fan system arranged inside the machine shell. A flue gas outlet connected to the outlet of the fan system is opened at the top of the machine shell, and an air outlet cover is arranged at the flue gas outlet. The air outlet cover adopts the air outlet cover for the oil fume extractor described above.

[0023] Compared with the prior art, the advantages of the present utility model are as follows: The second connecting portion of the connecting ring can be inserted into the annular installation groove on the first connecting portion of the cover body, and a sealing member in sealing contact with both is provided between the second connecting portion and the inner wall of the annular installation groove, ensuring the sealing performance at the connection position of the two. Thus, it can prevent the oil fluid from leaking from the gap under the action of the static pressure of the air flow. Brief Description of the Drawings

[0024] Figure 1 It is a schematic three-dimensional structure diagram of the air outlet cover of the embodiment of the present utility model;

[0025] Figure 2 It is a vertical sectional view of the air outlet cover of the embodiment of the present utility model;

[0026] Figure 3 It is Figure 2 the enlarged view at A in Detailed Description of the Embodiment

[0027] The present utility model will be further described in detail below in conjunction with the embodiments of the drawings.

[0028] In the description and claims of the present utility model, terms indicating directions such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", etc. are used to describe various exemplary structural parts and elements of the present utility model. However, these terms are used here only for the convenience of description and are determined based on the exemplary orientations shown in the drawings. Since the embodiments disclosed by the present utility model can be arranged in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to the directions opposite to or consistent with the direction of gravity.

[0029] Figures 1-3 A preferred embodiment of the air outlet cover for a range hood and the range hood of the present utility model is shown. An air outlet cover for a range hood includes a cover body 10, a connecting ring 20, and a sealing member.

[0030] The cover body 10 is integrally cylindrical, having an air inlet 101 and an air outlet 102 that are opposite to each other. The air inlet 101 of the cover body 10 is used to connect with the blower of the range hood, and the connecting ring 20 can be correspondingly connected at the air outlet 102, where the connecting ring 20 is connected to an external air outlet smoke pipe. A valve plate assembly 6 that can be opened or closed is also provided at the air outlet 102 of the cover body 10. The structure and working process of the valve plate assembly 6 are prior arts and will not be elaborated here.

[0031] The cover body 10 has a first connecting portion 11 extending outwardly adjacent to its air outlet 102, and an annular mounting groove 110 is formed at the top of the first connecting portion 11. The end portion (i.e., the second connecting portion 21) of the connecting ring 20 can be inserted into the annular mounting groove 110. Specifically, the first connecting portion 11 of the cover body 10 includes an inner ring wall and an outer ring wall which are spaced apart from each other inside and outside, and the gap between the inner ring wall and the outer ring wall constitutes the above-mentioned annular mounting groove 110.

[0032] See Figure 3 , the second connecting portion 21 of the connecting ring 20 includes a first ring wall 211 and a second ring wall 212 which are spaced apart in the radial direction of the connecting ring 20. The first ring wall 211 faces the inner side wall of the annular mounting groove 110, and the second ring wall 212 faces the outer side wall of the annular mounting groove 110. The spaced-apart first ring wall 211 and second ring wall 212 also enable the whole of the second connecting portion 21 to have a certain elastic deformation space in the radial direction, which facilitates its insertion into the annular mounting groove 110 of the cover body 10, and can maintain a certain pressing force (on the side wall of the annular mounting groove 110) after being installed in place and reset, further improving the sealing effect.

[0033] A locking sleeve 3 that can rotate circumferentially and move axially is sleeved on the outer peripheral wall of the first connecting portion 11 of this embodiment. Among them, a limiting stop edge 31 protruding radially inward is provided on the inner peripheral wall of the locking sleeve 3. For example, the upper port of the locking sleeve 3 is a reduced-opening structure with a diameter that decreases from bottom to top, and the stepped portion of this reduced-opening structure constitutes the above-mentioned limiting stop edge 31. An annular pressing portion 22 protruding radially outward is provided on the outer peripheral wall of the connecting ring 20 at a position adjacent to its second connecting portion 21. After the locking sleeve 3 is locked in place, it presses on the annular pressing portion 22 of the connecting ring 20 axially through its limiting stop edge 31, so as to press the annular pressing portion 22 of the connecting ring 20 against the first connecting portion 11 of the cover body 10.

[0034] The outer peripheral wall of the first connecting portion 11 has a first limiting rib 112 arranged in a spiral shape along its circumference, and the first limiting rib 112 has multiple segments arranged in sequence along the circumference of the first connecting portion 11. The inner peripheral surface of the locking sleeve 3 has a second limiting rib 32 arranged in a spiral shape along its circumference, and the second limiting rib 32 also has multiple segments arranged in sequence along the circumference of the locking sleeve 3. When the locking sleeve 3 is installed, it can be restricted on the first connecting portion 11 by the limiting cooperation between the first limiting rib 112 and the second limiting rib 32 by rotating a certain angle.

[0035] The seal of this embodiment includes a first sealing ring 4 and a second sealing ring 5. Among them, the first sealing ring 4 is pressed between the bottom of the second connecting portion 21 and the bottom wall of the annular installation groove 110. Specifically, the width dimension of the main body of the first sealing ring 4 is adapted to the width dimension of the annular installation groove 110. The first sealing ring 4 includes a sealing ring main body 41, and a first support leg 42 and a second support leg 43 which are arranged at intervals in the radial direction at the bottom of the sealing ring main body 41. In a preferred embodiment, a flange 44 which can abut against the bottom wall of the annular installation groove 110 is further provided at the position between the first support leg 42 and the second support leg 43 at the bottom of the sealing ring main body 41. After the first sealing ring 4 is installed in place, the second connecting portion 21 abuts against the top of the sealing ring main body 41. Specifically, the first annular wall 211 and the second annular wall 212 respectively abut against the positions on the top surface of the sealing ring main body 41 corresponding to the above-mentioned first support leg 42 and second support leg 43. The first sealing ring 4 is

[0036] pressed by the second connecting portion 21, and both the first support leg 42 and the second support leg 43 are in contact with two corner regions of the bottom wall of the annular installation groove 110. After the first sealing ring 4 is compressed, it deforms, and both its first support leg 42 and second support leg 43 abut against the bottom wall of the annular installation groove 110 and maintain a certain pressing force, effectively improving the sealing effect.

[0037] The second sealing ring 5 is pressed between the side wall of the annular installation groove 110 and the outer wall of the second connecting portion 21, that is, between the outer peripheral wall of the second annular wall 212 and the outer side wall of the annular installation groove 110. In order to avoid the problem of the second sealing ring 5 falling off, a limiting groove 111 for the second sealing ring 5 to be embedded therein is provided on the outer side wall of the annular installation groove 110. Considering that after the second sealing ring 5 is installed in place, it will protrude a part relative to the inner wall surface of the annular installation groove, and there is a certain resistance when the second connecting portion 21 of the connecting ring 20 is installed. In order to facilitate the insertion of the second connecting portion 21 of the connecting ring 20 into the annular installation groove 110 of the cover body 10, the outer side of the lower edge of the second annular wall 212 has an inclined guide surface 2120 that inclines inwards from top to bottom.

[0038] The second connecting portion 21 of the connecting ring 20 of this embodiment can be inserted into the annular installation groove 110 on the first connecting portion 11 of the cover body 10, and a seal that is in sealing contact with both of them is provided between the second connecting portion 21 and the inner wall of the annular installation groove 110, ensuring the sealing performance at the connection position of the two, thereby avoiding the leakage of oil fluid from the gap under the action of the static pressure of the air flow.

[0039] This embodiment also relates to a range hood, which includes a housing and a fan system arranged in the housing. A flue gas outlet connected to the outlet of the fan system is provided at the top of the housing, and an air outlet hood is provided at the flue gas outlet. The air outlet hood is the air outlet hood for the range hood described above.

Claims

1. An air outlet hood for a range hood, comprising: The cover body (10) has an air inlet (101) and an air outlet (102), wherein the air inlet (101) is used to be connected to a fan of the range hood; A connecting ring (20) is butted against the air outlet (102) of the cover body (10) and is used to connect to an external air outlet pipe; The invention is characterized in that: the cover body (10) has a first connecting portion (11) extending outwardly adjacent to its air outlet (102), the top of the first connecting portion (11) is provided with an annular mounting groove (110), the connecting ring (20) has a second connecting portion (21) which can be detachably inserted into the annular mounting groove (110) at a position corresponding to the air outlet (102) of the cover body (10), and a sealing member is provided between the second connecting portion (21) and the inner wall of the annular mounting groove (110) so as to be in sealing contact with both.

2. The air outlet cover for a range hood according to claim 1, characterized in that: The sealing member comprises a first sealing ring (4), which is pressed between the bottom of the second connecting portion (21) and the bottom wall of the annular mounting groove (110).

3. The air outlet cover for a range hood according to claim 2, characterized in that: The first sealing ring (4) comprises a sealing ring body (41) and a first support leg (42) and a second support leg (43) located at the bottom of the sealing ring body (41) and spaced apart in the radial direction, the second connecting portion (21) abuts against the top of the sealing ring body (41), and the first support leg (42) and the second support leg (43) are both in contact with the bottom wall of the annular mounting groove (110).

4. The air outlet cover for a range hood according to claim 3, characterized in that: The second connecting portion (21) comprises a first annular wall (211) and a second annular wall (212) which are spaced apart in the radial direction of the connecting ring (20); the first annular wall (211) and the second annular wall (212) respectively abut against positions on the top surface of the sealing ring body (41) corresponding to the first supporting leg (42) and the second supporting leg (43).

5. The air outlet cover for a range hood according to claim 2, characterized in that: The sealing member further comprises a second sealing ring (5), which is pressed between the side wall of the annular mounting groove (110) and the outer wall of the second connecting portion (21).

6. The air outlet cover for a range hood according to claim 5, characterized in that: A limiting groove (111) for embedding and installing the second sealing ring (5) is provided on the side wall of the annular installation groove (110).

7. The air outlet cover for a range hood according to claim 6, characterized in that: The second connecting portion (21) comprises a first annular wall (211) and a second annular wall (212) which are spaced apart in the radial direction of the connecting ring (20); the second annular wall (212) is located outside the first annular wall (211); and the limiting groove (111) is provided on the side wall of the annular mounting groove (110) which is opposite to the outer wall of the second annular wall (212).

8. The air outlet cover for a range hood according to claim 7, characterized in that: The outer side of the lower edge of the second annular wall (212) has a guide slope (2120) that slopes inward from top to bottom.

9. The air outlet cover for a range hood according to any one of claims 1 to 8, characterized in that: A locking sleeve (3) is sleeved on the outer peripheral wall of the first connecting portion (11) and is rotatable in the circumferential direction and movable in the axial direction. The inner peripheral wall of the locking sleeve (3) is provided with a limit stop edge (31) protruding radially inwards. The outer peripheral wall of the connecting ring (20) is provided with an annular pressing portion (22) protruding radially outwards at a position adjacent to the second connecting portion (21). The locking sleeve (3) presses the annular pressing portion (22) of the connecting ring (20) onto the first connecting portion (11) of the cover body (10) via the limit stop edge (31).

10. The air outlet cover for a range hood according to claim 9, characterized in that: The outer peripheral wall of the first connecting portion (11) is provided with a first limiting rib (112) which is arranged in a spiral manner along its circumference, and the inner peripheral surface of the locking sleeve (3) is provided with a second limiting rib (32) which is arranged in a spiral manner along its circumference. The locking sleeve (3) is constrained on the first connecting portion (11) by the limiting cooperation between the first limiting rib (112) and the second limiting rib (32).

11. The air outlet cover for a range hood according to claim 10, characterized in that: The first limiting rib (112) has a plurality of sections arranged in sequence along the circumference of the first connecting portion (11), and the second limiting rib (32) also has a plurality of sections arranged in sequence along the circumference of the locking sleeve (3).

12. A range hood, comprising a housing and a fan system arranged in the housing, wherein a smoke outlet connected to an outlet of the fan system is provided at the top of the housing, and an air outlet hood is provided at the smoke outlet, characterized in that: The air outlet hood is the air outlet hood for a range hood according to any one of claims 1 to 11.

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