Air outlet cover for range hood and range hood

Abstract

The utility model relates to an air outlet cover for a range hood, which comprises a cover body, an air inlet, an air outlet, an air inlet, an air outlet, an air outlet, a fan and an air outlet cover, and is characterized in that the cover body is provided with an air inlet and an air outlet; 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 is arranged at the position, in butt joint with the air outlet of the cover body, of the connecting ring. The air outlet cover further comprises a sealing piece which can be installed on the second connecting part and can be taken down from the second connecting part, and under the state that the sealing piece is installed on the second connecting part in place, the second connecting part and the sealing piece installed on the second connecting part can be installed in the annular installation groove together. And the sealing piece is in sealing contact with 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 harmful oil 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 first 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 first 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, and the pressure at the air outlet position is relatively large. During operation, the accumulated oil is easily 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 present utility model to solve the first technical problem is as follows: An air outlet hood for a range hood, comprising:

[0009] A hood body having an air inlet and an air outlet, and the air inlet is used to connect with the fan of the range hood;

[0010] A connecting ring is docked at the air outlet of the hood body and is used to connect with an external air outlet smoke pipe;

[0011] The hood body has a first connecting portion extending outward near its air outlet. An annular installation groove is formed at the top of the first connecting portion. The connecting ring has a second connecting portion at a position opposite to the air outlet of the hood body. The air outlet hood further includes a sealing member that can be installed on and removed from the second connecting portion. In a state where the sealing member is installed in place on the second connecting portion, the second connecting portion and the sealing member installed thereon can be inserted into the annular installation groove together, and the sealing member is in sealing contact with the inner wall of the second connecting portion and the annular installation groove.

[0012] Generally speaking, the sealing member can be installed on the side wall or the bottom wall of the second connecting portion, or the side wall or the bottom wall of the second connecting portion can be wrapped together. However, for the sake of the reliability of the assembly between the connecting ring and the hood body and to ensure the sealing performance, the second connecting portion has an inner first side wall and an outer second side wall, and the sealing member is installed on the first side wall or the second side wall.

[0013] To improve the reliability of the installation of the sealing member on the second connecting portion, a positioning groove is formed on the first side wall or the second side wall of the second connecting portion, and a positioning rib corresponding to the positioning groove is provided on the sealing member.

[0014] To further improve the reliability of the installation of the sealing member on the second connecting portion and further ensure the sealing performance between the two, at least two positioning grooves are arranged in sequence along the axial direction of the connecting ring, and there are also at least two corresponding ones on the sealing member.

[0015] As an improvement, the first side wall of the second connecting portion faces the inner side wall of the annular installation groove, and the second side wall faces the outer side wall of the annular installation groove. The first side wall extends vertically, and the second side wall gradually inclines outward from bottom to top relative to the vertical direction, so that the thickness of the second connecting portion gradually increases from bottom to top. Each of the positioning grooves is arranged on the second side wall. The above structural design enables the sealing member to be deformed under the lateral pressure during the process of being inserted into the annular installation groove together with the second connecting portion to ensure the sealing performance, and it is not easy to fall off.

[0016] In order to improve the sealing effect, the depths of the positioning grooves increase successively from bottom to top. Correspondingly, the heights of the positioning ridges on the seal increase successively from bottom to top. The above structural design forms a more tightly sealed labyrinth groove, improving the sealing effect between the first connecting portion and the second connecting portion.

[0017] In order to facilitate the smooth installation of the seal and the second connecting portion into the annular installation groove together, the outer side wall of the seal away from the second connecting portion also extends vertically.

[0018] In order to reduce the oil in the annular installation groove from entering the gap between the seal and the second connecting portion, the bottom of the seal has a sealing protrusion that can be in sealing contact with the bottom of the second connecting portion.

[0019] In order to ensure the reliability of the connection between the cover body and the connecting ring, the first connecting portion of the cover body has a first flange extending outward, the second connecting portion of the connecting ring has a second flange extending outward, and the first flange and the second flange are connected by fasteners. It can be imagined that in addition to the above-mentioned flange mating connection, the connecting ring and the cover body can also be locked by an external locking sleeve.

[0020] The technical solution adopted by the present utility model to solve the second technical problem is: an oil fume extractor, including a casing and a fan system disposed inside the casing. A flue gas outlet connected to the outlet of the fan system is opened at the top of the casing, and an air outlet cover is provided at the flue gas outlet. The air outlet cover adopts the above-mentioned air outlet cover for the oil fume extractor.

[0021] Compared with the prior art, the advantages of the present utility model are: when the cover body and the connecting member are assembled, the seal can be installed on the second connecting portion and can be loaded into the annular installation groove of the cover body together with the second connecting portion. After being installed in place, the seal is in sealing contact with both the second connecting portion and the inner wall of the annular installation groove, ensuring the sealing performance at the connection position between the second connecting portion of the connecting ring and the annular installation groove of the cover body. Thus, it can prevent the oil from leaking from the gap under the action of the static pressure of the air flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a three-dimensional structural schematic diagram of the air outlet cover according to an embodiment of the present utility model;

[0023] Figure 2 is an axial sectional view of the air outlet cover according to an embodiment of the present utility model;

[0024] Figure 3 is Figure 2 an enlarged view of part A in

[0025] Figure 4 is a three-dimensional structural schematic diagram of an embodiment of the present utility model. Detailed implementation mode

[0026] The following further describes the present utility model in detail with reference to the embodiments in the accompanying drawings.

[0027] 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 purpose of convenient description and are determined based on the exemplary orientations shown in the accompanying 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.

[0028] Figures 1-4 Fig. shows a preferred embodiment of the air outlet hood for a range hood and the range hood of the present utility model. An air outlet hood for a range hood includes a hood body 10, a connecting ring 20, and a sealing member 30.

[0029] The hood body 10 is generally cylindrical, having an air inlet 101 and an air outlet 102 that are opposite to each other. The air inlet 101 of the hood 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, wherein the connecting ring 20 is connected to the external air outlet smoke pipe. A valve plate assembly 40 that can be opened or closed is further provided at the air outlet 102 of the hood body 10. The structure and working process of the valve plate assembly 40 are both prior arts and will not be elaborated here.

[0030] See Figure 3 , the hood body 10 has a first connecting portion 11 extending outward adjacent to its air outlet 102, and an annular installation 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 installation groove 110. Specifically, the first connecting portion 11 of the hood body 10 includes a first annular wall and a second annular wall that are spaced apart inside and outside. The second annular wall is located outside the first annular wall, and the gap between the two constitutes the above-mentioned annular installation groove 110. The vertical height of the second annular wall is slightly higher than the vertical height of the first annular wall, and the top edge of the second annular wall further has a first flange 12 that extends outward and is turned over. The first flange 12 can be connected to the corresponding second flange 22 on the connecting ring 20 through fasteners. The fasteners can be connecting members that cooperate with bolts and nuts or a claw structure that can generate a pre-tightening force between the two in the axial direction.

[0031] The connecting ring 20 as a whole is also tubular and is butted at the air outlet 102 of the cover body 10. One end of the connecting ring 20 away from the cover body 10 can be connected to an external air outlet smoke pipe. The connecting ring 20 has a second connecting portion 21 at a position opposite to the air outlet 102 of the cover body 10. The sealing member 30 can be installed on the second connecting portion 21 and can be removed from the second connecting portion 21. In a state where the sealing member 30 is installed in place on the second connecting portion 21, the second connecting portion 21 and the sealing member 30 installed thereon can be loaded into the annular installation groove 110 of the cover body 10 together. After being installed in place, the sealing member 30 is in sealing contact with both the second connecting portion 21 and the inner wall of the annular installation groove 110, ensuring the sealing performance of the second connecting portion 21 of the connecting ring 20 and the annular installation groove 110 of the cover body 10 at the connecting position. Thus, it can prevent the oil liquid from leaking from the gap under the action of the static pressure of the air flow.

[0032] The second connecting portion 21 of the connecting ring 20 has an inner and outer opposite first side wall 211 and a second side wall 212. The first side wall 211 of the second connecting portion 21 faces the inner side wall of the annular installation groove 110, and the second side wall 212 faces the outer side wall of the annular installation groove 110. The first side wall 211 extends vertically, and the second side wall 212 gradually inclines outward from bottom to top relative to the vertical direction, so that the thickness of the second connecting portion 21 gradually increases from bottom to top. In a preferred embodiment, the sealing member 30 is installed on the second side wall 212 of the second connecting portion 21 of the connecting ring 20, that is, between the second side wall 212 of the second connecting portion 21 and the outer side wall of the annular installation groove 110 of the cover body 10. The width dimension of the annular installation groove 110 of the cover body 10 is the same up and down. In order to facilitate the smooth installation of the sealing member 30 and the second connecting portion into the annular installation groove 110 together, the outer side wall of the sealing member 30 away from the second connecting portion also extends vertically.

[0033] See Figure 4 , at least two positioning grooves 213 are provided on the second side wall 212 of the second connecting portion 21 of the connecting ring 20 in sequence along the axial direction of the connecting ring 20. Among them, the depths of the positioning grooves 213 increase in sequence from bottom to top. Correspondingly, at least two positioning protrusions 31 that can be embedded into the positioning grooves 213 are provided on the sealing member 30, and the heights of the positioning protrusions 31 on the sealing member 30 increase in sequence from bottom to top. The sizes and shapes of the positioning protrusions 31 on the sealing member 30 are adapted to the sizes and shapes of the positioning grooves 213 on the second connecting portion 21 of the connecting ring 20. Thus, it can effectively ensure the sealing performance after the positioning protrusions 31 on the sealing member 30 are embedded into the corresponding positioning grooves 213. The positioning grooves 213 with different depth dimensions and the positioning protrusions 31 with different heights cooperate to form a more tightly sealed labyrinth groove, improving the sealing effect between the first connecting portion 11 and the second connecting portion 21.

[0034] The above-mentioned fitting of the positioning groove 213 and the positioning protrusion and the inclined design of the second side wall 212 of the second connecting portion 21 enable the sealing member 30 to be deformed under lateral pressure during the process of being inserted into the annular mounting groove 110 together with the second connecting portion 21, ensuring the sealing performance and not easily falling off.

[0035] The bottom of the sealing member 30 has a retaining edge extending to the bottom wall of the second connecting portion. The retaining edge is located below the positioning rib 31 at the lowest position of the sealing member 30, and a sealing protrusion 32 capable of making sealing contact with the bottom of the second connecting portion is provided on the top of the retaining edge. The positioning protrusion abuts against the bottom wall of the second connecting portion, which can reduce the oil in the annular mounting groove 110 from entering the gap between the sealing member 30 and the second connecting portion 21.

[0036] When the cover body 10 and the connecting member are assembled, the sealing member 30 can be installed on the second connecting portion 21 and can be inserted into the annular mounting groove 110 of the cover body 10 together with the second connecting portion 21. After being installed in place, the sealing member 30 makes sealing contact with the inner walls of the second connecting portion 21 and the annular mounting groove 110, ensuring the sealing performance at the connection position between the second connecting portion 21 of the connecting ring 20 and the annular mounting groove 110 of the cover body 10, thereby avoiding the leakage of oil from the gap under the action of the static pressure of the air flow.

[0037] This embodiment also relates to a range hood, which includes a housing and a fan system provided in the housing. A flue gas outlet connected to the outlet of the fan system is opened at the top of the housing, and an air outlet cover is provided at the flue gas outlet. The air outlet cover is the air outlet cover 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), and an annular mounting groove (110) is provided at the top of the first connecting portion (11); the connecting ring (20) has a second connecting portion (21) at a position corresponding to the air outlet (102) of the cover body (10); the air outlet cover also includes a sealing member (30) that can be installed on the second connecting portion (21) and can be removed from the second connecting portion (21); when the sealing member (30) is installed in place on the second connecting portion (21), the second connecting portion (21) and the sealing member (30) installed thereon can be installed together in the annular mounting groove (110), so that the sealing member (30) is in sealing contact with the second connecting portion (21) and the inner wall of the annular mounting groove (110).

2. The air outlet cover for a range hood according to claim 1, characterized in that: The second connecting portion (21) has a first side wall (211) and a second side wall (212) which are opposite to each other, and the sealing member (30) is mounted on the first side wall (211) or the second side wall (212).

3. The air outlet cover for a range hood according to claim 2, characterized in that: A positioning groove (213) is provided on the first side wall (211) or the second side wall (212) of the second connecting portion (21), and a positioning convex strip (31) capable of being embedded in the positioning groove (213) is correspondingly provided on the sealing member (30).

4. The air outlet cover for a range hood according to claim 3, characterized in that: The positioning grooves (213) have at least two arranged in sequence along the axial direction of the connecting ring (20), and the sealing member (30) also has at least two corresponding ones.

5. The air outlet cover for a range hood according to claim 4, characterized in that: The first side wall (211) of the second connecting portion (21) is opposite to the inner side wall of the annular mounting groove (110), and the second side wall (212) is opposite to the outer side wall of the annular mounting groove (110). The first side wall (211) extends vertically, and the second side wall (212) is gradually inclined outward from bottom to top relative to the vertical direction, so that the thickness of the second connecting portion (21) gradually decreases from bottom to top, and each of the positioning grooves (213) is arranged on the second side wall (212).

6. The air outlet cover for a range hood according to claim 5, characterized in that: The depth of each positioning groove (213) increases sequentially from bottom to top, and correspondingly, the height of the positioning convex strip (31) on the sealing member (30) increases sequentially from bottom to top.

7. The air outlet cover for a range hood according to claim 5, characterized in that: The outer side wall of the sealing member (30) away from the second connecting portion also extends vertically.

8. The air outlet cover for a range hood according to claim 3, characterized in that: The bottom of the sealing member (30) has a sealing protrusion (32) capable of sealingly contacting the bottom of the second connecting portion.

9. The air outlet cover for a range hood according to any one of claims 1 to 8, characterized in that: The first connecting portion (11) of the cover body (10) has a first flange (12) extending outward, and the second connecting portion (21) of the connecting ring (20) has a second flange (22) extending outward. The first flange (12) and the second flange (22) are connected via fasteners.

10. 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 9.

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