CN212338292U

CN212338292U - Check valve and lampblack absorber

Info

Publication number: CN212338292U
Application number: CN202021140323.8U
Authority: CN
Inventors: 任富佳; 韦磊; 陈卫星; 刘毅; 黄禄英; 余国成; 周海昕
Original assignee: Hangzhou Robam Appliances Co Ltd
Current assignee: Hangzhou Robam Appliances Co Ltd
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2021-01-12
Anticipated expiration: 2030-06-18

Abstract

The utility model discloses a check valve and lampblack absorber relates to kitchen appliance technical field. The check valve comprises a first connecting structure used for connecting a smoke exhaust pipe and a second connecting structure used for connecting a purifying device, wherein the first connecting structure and the second connecting structure form an air outlet channel together; when the smoke exhaust pipe is connected with the first connecting structure, the smoke exhaust pipe is communicated with the air outlet channel, and when the purifying device is connected with the second connecting structure, the purifying device can purify the air in the air outlet channel. This lampblack absorber includes above-mentioned check valve. The utility model provides a check valve and lampblack absorber to alleviate the relatively poor technical problem of commonality of the check valve that exists among the prior art.

Description

Check valve and lampblack absorber

Technical Field

The utility model belongs to the technical field of the kitchen appliance technique and specifically relates to a check valve and lampblack absorber are related to.

Background

The range hood is also called as a range hood, and is a household appliance widely used in a kitchen, and generally comprises a machine body and a check valve connected to an air outlet of the machine body, wherein the check valve is used for preventing oil smoke from being refilled into the kitchen to cause secondary pollution to the interior of the kitchen.

The range hood is generally divided into an external discharge mode and an internal circulation mode. Under the outer mode of arranging, the lampblack absorber can arrange the oil smoke that cooks in the kitchen and produce to public flue or kitchen outside, and at this moment, the check valve connection smoke pipe to through the pipe connection public flue of discharging fume. Under the inner loop mode, the lampblack absorber can carry out the oil fat, smog, harmful gas and bacterium etc. that produce among the culinary art process and discharge to the kitchen again after the purification treatment in, need not to discharge external pipe, and at this moment, purifier is connected to the check valve, purifies the kitchen air through purifier.

However, the existing check valve can only match one of an external discharge mode and an internal circulation mode of the range hood, so that the universality of the check valve is poor.

Therefore, the present application provides a new check valve and range hood to the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a check valve to alleviate the relatively poor technical problem of commonality of the check valve that exists among the prior art.

An object of the utility model is also to provide a lampblack absorber to further alleviate the relatively poor technical problem of commonality of the check valve that exists among the prior art.

Based on the first purpose, the utility model provides a check valve, which comprises a first connecting structure for connecting a smoke exhaust pipe and a second connecting structure for connecting a purifying device, wherein the first connecting structure and the second connecting structure together form an air outlet channel;

when the smoke exhaust pipe is connected with the first connecting structure, the smoke exhaust pipe is communicated with the air outlet channel, and when the purifying device is connected with the second connecting structure, the purifying device can purify the gas in the air outlet channel.

Further, a bayonet is arranged on the second connecting structure, and a clamping pin capable of being clamped in the bayonet is arranged on the purifying device.

Furthermore, the clamping pin comprises a plug-in part and a clamping part which are connected, the plug-in part is connected with the purifying device, and the clamping part is perpendicular to the plug-in part;

when the clamping foot is clamped at the bayonet, the inserting part is inserted into the bayonet, and the clamping part penetrates through the bayonet and is clamped at one side of the bayonet, which is far away from the purifying device.

Furthermore, a limiting groove is formed in the first connecting structure, and a first limiting protrusion capable of being clamped in the limiting groove is arranged on the smoke exhaust pipe.

Furthermore, the limiting groove comprises a transverse groove extending along the circumferential direction of the first connecting structure and a vertical groove arranged at an angle with the transverse groove, one end of the vertical groove penetrates through the edge of the first connecting structure, and the other end of the vertical groove is communicated with the transverse groove;

the first limiting protrusion can enter the vertical groove from the edge of the first connecting structure and is clamped in the transverse groove along the circumferential direction of the first connecting structure.

Furthermore, a plurality of limiting grooves are arranged at intervals along the circumferential direction of the first connecting structure;

and/or, the bayonet socket is provided with a plurality of, and is a plurality of the bayonet socket is followed second connection structure's circumference interval sets up.

Further, the first connecting structure is detachably connected with the second connecting structure.

Furthermore, the second connecting structure is provided with a second limiting bulge which can be clamped in the limiting groove.

Furthermore, the first connecting structure and the second connecting structure are fixedly connected or integrally arranged, and the bayonet is arranged on one side of the limiting groove far away from the air outlet channel.

Adopt above-mentioned technical scheme, the utility model discloses a check valve has following beneficial effect:

when the range hood is assembled, the check valve is installed on the body of the range hood and located at the air outlet of the body, so that the air outlet is communicated with the air outlet channel, and therefore air at the air outlet can be discharged through the air outlet channel.

Under the outer mode of arranging of lampblack absorber, will discharge fume the union coupling in first connection structure, make and discharge fume the union coupling with the check valve, and discharge fume the union and air-out passageway intercommunication this moment to the exhaust air of air-out passageway of check valve can be discharged to public flue or kitchen outside through discharging fume the union.

Under the inner loop mode of lampblack absorber, connect purifier in second connection structure, make purifier and check valve be connected, and purifier can purify the air of air-out passageway this moment to the exhaust air of air-out passageway of check valve can discharge again to the kitchen in through purifier purification back.

By the arrangement, the check valve can be connected with the smoke exhaust pipe to be suitable for the outward discharge mode of the range hood and can also be connected with the purification device to be suitable for the internal circulation mode of the range hood, so that the universality of the check valve is improved, and the cost of the range hood is reduced.

Based on above-mentioned second purpose, the utility model provides a range hood, including the organism, set up in the collection petticoat pipe of organism below reaches the check valve, the check valve connect in the air outlet department of organism, just the air-out passageway of check valve with the air outlet intercommunication.

Adopt above-mentioned technical scheme, the utility model discloses a lampblack absorber has following beneficial effect:

through set up above-mentioned check valve in the lampblack absorber, corresponding, this lampblack absorber has all advantages of above-mentioned check valve, no longer gives details here.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to these drawings without inventive efforts.

Fig. 1 is an exploded view of a check valve according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a check valve provided in the second embodiment of the present invention (a valve plate is not shown);

fig. 3 is a schematic structural diagram of a range hood provided by the third embodiment of the present invention;

fig. 4 is an enlarged view of a portion of the structure of fig. 3.

Reference numerals:

100-check valve;

110-a first connecting structure; 111-a limiting groove; 112-transverse groove; 113-vertical slots;

120-a second connecting structure; 121-a second limit projection; 122-bayonet; 123-a connecting part; 124-a support part; 125-connecting hole;

130-valve plate;

200-a purification device; 210-a support frame; 220-filtering material; 230-clamping pin;

300-body; 400-smoke collecting hood; 500-blower.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example one

Referring to fig. 1, the present embodiment provides a check valve 100, where the check valve 100 includes a first connecting structure 110 for connecting a smoke exhaust pipe and a second connecting structure 120 for connecting a purifying device 200, and the first connecting structure 110 and the second connecting structure 120 form an air outlet channel together; when the smoke exhaust pipe is connected with the first connecting structure 110, the smoke exhaust pipe is communicated with the air outlet channel, and when the purifying device 200 is connected with the second connecting structure 120, the purifying device 200 can purify the air in the air outlet channel.

It should be noted that, when assembling the range hood, the check valve 100 is installed at the body 300 of the range hood and located at the air outlet of the body 300, so that the air outlet is communicated with the air outlet channel, and therefore, the air at the air outlet can be discharged through the air outlet channel.

Under the outer mode of arranging of lampblack absorber, will discharge fume the union coupling in first connection structure, make and discharge fume the union coupling with check valve 100, and discharge fume the union and air-out passageway intercommunication this moment to the exhaust air of check valve 100 can be discharged to public flue or kitchen outside through discharging fume the union.

Under the inner loop mode of lampblack absorber, connect purifier 200 in second connection structure 120, make purifier 200 be connected with check valve 100, and purifier 200 can purify the air of air-out passageway this moment to the exhaust air of air-out passageway of check valve 100 can be discharged again to the kitchen after purifying through purifier 200.

Due to the arrangement, the check valve 100 can be connected with the smoke exhaust pipe to be suitable for the outward discharge mode of the range hood and can also be connected with the purification device 200 to be suitable for the internal circulation mode of the range hood, so that the universality of the check valve 100 is improved, and the cost of the range hood is reduced.

Optionally, the first connecting structure 110 or the second connecting structure 120 of the check valve 100 is connected to the body 300, for example, by snapping, fastening, or screwing, and is not limited herein.

Optionally, the smoke exhaust pipe is connected with the first connecting structure in a clamping, buckling or threaded connection mode; the purification device 200 is connected to the second connection structure by means of clamping, fastening, or screwing.

Preferably, referring to fig. 3, in the present embodiment, the purification device 200 is a filter element with activated carbon inside, and preferably, referring to fig. 3, the filter element includes a support frame 210 and a filter material 220 disposed in the support frame 210, wherein the filter material 220 is activated carbon, and the activated carbon can have a good adsorption effect on organic pollutants in the air, so that after the air passes through the filter element, the pollutants in the air can be adsorbed on the filter element, thereby achieving the purpose of cleaning and purifying the air.

Preferably, referring to fig. 1 and fig. 4, in the present embodiment, the second connecting structure 120 is provided with a bayonet 122, and the purifying device 200 is provided with a locking pin 230 capable of being locked to the bayonet 122.

With this arrangement, the purification apparatus 200 is connected to the second connection structure 120 in a snap-fit manner.

Preferably, referring to fig. 1, the second connecting structure 120 is provided with a connecting portion 123, and the bayonet 122 is provided on the connecting portion 123.

Preferably, the fastening pin 230 is disposed on the supporting frame 210, so as to improve the firmness of the fastening pin 230 connected to the purifying apparatus 200.

Preferably, in this embodiment, the locking pin 230 includes a plug portion and a locking portion connected to each other, the plug portion is connected to the purifying device 200, and the locking portion is perpendicular to the plug portion; when the locking pin 230 is locked to the locking opening 122, the insertion portion is inserted into the locking opening 122, and the locking portion passes through the locking opening 122 and is locked to a side of the locking opening 122 away from the purifying apparatus 200.

In such an arrangement, when the purification apparatus 200 needs to be mounted on the check valve 100, the clamping portion is first inserted into the bayonet 122 by passing the clamping portion through the bayonet 122, and the clamping portion is located on a side of the bayonet 122 away from the purification apparatus 200, and the purification apparatus 200 is rotated relative to the check valve 100 so that the clamping portion moves along the bayonet 122, so that the clamping portion is clamped to the bayonet 122.

When the purification apparatus 200 needs to be detached from the check valve 100, it is only necessary to rotate the purification apparatus 200 relative to the check valve 100 to move the insertion portion along the bayonet 122 until the engagement portion is aligned with the bayonet 122, and then pull out the engagement portion and the insertion portion from the bayonet 122.

In conclusion, the check valve 100 facilitates the assembling and disassembling operation of the purifying device 200, saves time and labor, and reduces the operation intensity of the assembling worker of the range hood.

Preferably, referring to fig. 1 and fig. 2, in this embodiment, a limiting groove 111 is disposed on the first connecting structure 110, and a first limiting protrusion capable of being clamped in the limiting groove 111 is disposed on the smoke exhaust pipe.

Due to the arrangement, the smoke exhaust pipe is connected with the first connecting structure 110 in a clamping mode.

Preferably, referring to fig. 1 and fig. 2, in the present embodiment, the limiting groove 111 includes a transverse groove 112 extending along the circumferential direction of the first connecting structure 110 and a vertical groove 113 disposed at an angle to the transverse groove 112, one end of the vertical groove 113 penetrates through the edge of the first connecting structure 110, and the other end is communicated with the transverse groove 112; the first limiting protrusion can enter the vertical groove 113 from the edge of the first connecting structure 110, and is clamped in the transverse groove 112 along the circumferential direction of the first connecting structure 110.

With the arrangement, when the smoke exhaust pipe is required to be installed on the check valve 100, the first limiting protrusion enters the vertical groove 113 from the edge of the first connecting structure 110, and moves to the horizontal groove 112 along the vertical groove 113, and then the smoke exhaust pipe rotates along the circumferential direction of the first connecting structure 110, so that the first limiting protrusion moves along the horizontal groove 112, the first limiting protrusion is clamped in the horizontal groove 112, and the smoke exhaust pipe is clamped and connected with the first connecting structure.

When the smoke exhaust pipe is required to be detached from the check valve 100, the smoke exhaust pipe only needs to be made to rotate along the circumferential direction of the first connecting structure 110, so that the first limiting protrusion moves along the transverse groove 112 until the first limiting protrusion moves to the communication position of the transverse groove 112 and the vertical groove 113, the first limiting protrusion moves along the vertical groove 113 to the direction far away from the transverse groove 112, until the first limiting protrusion breaks away from the vertical groove 113 from the edge of the first connecting structure 110, the first limiting protrusion breaks away from the limiting groove 111 is realized, and the smoke exhaust pipe is detached from the check valve 100.

In conclusion, the check valve 100 enables the loading and unloading operation of the smoke exhaust pipe to be more convenient, saves time and labor, and reduces the operation intensity of the assembly workers of the range hood.

Optionally, the limiting groove 111 is provided in plurality, and the plurality of limiting grooves 111 are arranged at intervals along the circumferential direction of the first connecting structure 110; alternatively, the plurality of bayonets 122 are provided, and the plurality of bayonets 122 are provided at intervals along the circumferential direction of the second connection structure 120. Preferably, the plurality of limiting grooves 111 are provided, and the plurality of limiting grooves 111 are arranged at intervals along the circumferential direction of the first connecting structure 110; meanwhile, the plurality of bayonets 122 are provided, and the plurality of bayonets 122 are arranged at intervals in the circumferential direction of the second connection structure 120.

This arrangement makes it more secure and reliable for the smoke evacuation pipe to be connected to the check valve 100 by the first connecting structure 110, and for the purification apparatus 200 to be connected to the check valve 100 by the second connecting structure 120.

Alternatively, the limiting grooves 111 are provided with two, three, four, five, or the like, and preferably, a plurality of limiting grooves 111 are uniformly provided along the circumferential direction of the first connecting structure 110. The bayonets 122 are provided with two, three, four, five, etc., and preferably, a plurality of the bayonets 122 are uniformly arranged along the circumference of the second connecting structure 120.

With continued reference to fig. 1, in the present embodiment, the first connecting structure 110 is detachably connected to the second connecting structure 120.

With the arrangement, when the range hood needs to be used in an outward discharge mode, the second connecting structure 120 is detached from the first connecting structure 110, only the first connecting structure 110 is used alone, and the smoke exhaust pipe is clamped in the limiting groove 111 on the first connecting structure 110, namely, the smoke exhaust pipe and the body 300 of the range hood are connected through the first connecting structure 110.

When the internal circulation mode of the range hood needs to be used, the second connecting structure 120 is connected to the first connecting structure 110, so that the first connecting structure 110 and the second connecting structure 120 jointly connect the purifying device 200 to the machine body 300; alternatively, the second connecting structure 120 may be detached from the first connecting structure 110, and only the second connecting structure 120 may be used alone. In this case, the stopper groove 111 of the first connection structure 110 does not need to be used, and only the bayonet 122 of the second connection structure 120, specifically, the locking leg 230 of the purification apparatus 200 may be locked to the bayonet 122 of the second connection structure 120.

Alternatively, the second connecting structure 120 and the first connecting structure 110 are connected by snapping, fastening, or screwing.

Preferably, please refer to fig. 1, in this embodiment, the second connecting structure 120 is provided with a second limiting protrusion 121 capable of being clamped in the limiting groove 111.

With such an arrangement, when the second connecting structure 120 needs to be connected to the first connecting structure 110, only the second limiting protrusion 121 needs to be clamped in the limiting groove 111.

It should be noted that, when the internal circulation mode of the range hood is used, the limiting groove 111 on the first connecting structure 110 is placed and is not used, and the second limiting protrusion 121 is clamped in the limiting groove 111 to connect the second connecting structure 120 to the first connecting structure 110, so that the first limiting protrusion and the second limiting protrusion 121 share the limiting groove 111, the structure of the first connecting structure 110 is simplified, and the cost of the first connecting structure 110 is reduced.

Optionally, the first limiting protrusion and the second limiting protrusion 121 have the same or different structures, and are not limited herein as long as they can be engaged with the limiting groove 111.

It should be noted that the check valve 100 further includes a valve plate 130, and optionally, referring to fig. 1, the valve plate 130 is mounted on the first connecting structure 110.

Wherein, valve block 130 has and opens and the closed condition, and when valve block 130 was in the open condition, the air-out passageway was opened, and the oil smoke in the organism 300 of lampblack absorber can be discharged through check valve 100, and when valve block 130 was in the closed condition, the air-out passageway was closed, can prevent that outside oil smoke from scurrying inside the organism 300 of lampblack absorber.

Referring to fig. 2, in the embodiment, the second connecting structure 120 is provided with a supporting portion 124 for supporting the valve plate 130, and the supporting portion 124 is provided with a connecting hole 125 for connecting the valve plate 130.

Example two

Referring to fig. 2, the present embodiment provides a check valve 100, where the check valve 100 includes a first connecting structure 110 for connecting a smoke exhaust pipe and a second connecting structure 120 for connecting a purifying device 200, and the first connecting structure 110 and the second connecting structure 120 form an air outlet channel together; when the smoke exhaust pipe is connected with the first connecting structure 110, the smoke exhaust pipe is communicated with the air outlet channel, and when the purifying device 200 is connected with the second connecting structure 120, the purifying device 200 can purify the air in the air outlet channel.

It should be noted that, when the range hood is assembled, the check valve 100 is mounted on the body 300 of the range hood, and optionally, the first connection structure 110 or the second connection structure 120 of the check valve 100 is connected to the body 300, for example, by being snapped, fastened, or screwed, which is not limited herein. And the check valve 100 is located at the air outlet of the body 300 to communicate the air outlet with the air outlet channel, so that the air at the air outlet can be discharged through the air outlet channel.

Under the inner loop mode of lampblack absorber, connect purifier 200 in second connection structure, make purifier 200 be connected with check valve 100, and purifier 200 can purify the air of air-out passageway this moment to discharge again to the kitchen in through purifier 200 purification back of the air-out passageway exhaust air of check valve 100.

Preferably, referring to fig. 2, the second connecting structure 120 is provided with a connecting portion 123, and the bayonet 122 is provided on the connecting portion 123.

Referring to fig. 2, in the present embodiment, the first connecting structure 110 and the second connecting structure 120 are fixedly connected or integrally disposed.

With the arrangement, when the range hood needs to be used in an outward discharge mode, the bayonet 122 is not needed, and only the limiting groove 111 is used, so that the smoke exhaust pipe is clamped in the limiting groove 111 on the second connecting structure 120. When the internal circulation mode of the range hood needs to be used, the limiting groove 111 does not need to be used, only the bayonet 122 is used, and the clamping pin 230 of the purifying device 200 is clamped on the bayonet 122.

When the first connecting structure 110 is fixedly connected to the second connecting structure 120, optionally, the first connecting structure 110 is connected to the second connecting structure 120 by welding or bonding.

Preferably, referring to fig. 2, in the embodiment, the bayonet 122 is disposed on a side of the limiting groove 111 away from the air outlet channel.

When the purification apparatus 200 is a filter element, the diameter of the smoke discharge pipe is smaller than that of the filter element, and thus the bayonet 122 connected to the filter element is provided outside the stopper groove 111 connected to the smoke discharge pipe, so that both the filter element and the smoke discharge pipe can be mounted to the check valve 100.

It should be noted that the check valve 100 further includes a valve plate 130, and optionally, referring to fig. 2, the valve plate 130 is mounted on the second connecting structure 120.

EXAMPLE III

The third embodiment provides a range hood, the range hood comprises the check valve 100 of the first embodiment or the second embodiment, technical features of the check valve 100 disclosed in the first embodiment or the second embodiment are also applicable to the third embodiment, and technical features of the check valve 100 disclosed in the first embodiment or the second embodiment are not described repeatedly. The following describes embodiments of the range hood in further detail with reference to the accompanying drawings.

Referring to fig. 3, the range hood provided in the present embodiment includes a body 300, a smoke collecting hood 400 disposed below the body 300, and the check valve 100; the check valve 100 is connected to the air outlet of the body 300, and the air outlet channel is communicated with the air outlet.

Please refer to fig. 3, a blower 500 is disposed in the body 300, and an outlet of the blower 500 is communicated with the air outlet, so that the air discharged by the blower 500 can enter the air outlet channel through the air outlet and be discharged through the smoke exhaust pipe, or be purified by the purifying device 200.

The range hood of the present embodiment has the advantages of the check valve 100 of the first embodiment or the second embodiment, which have been described in detail in the first embodiment or the second embodiment, and will not be repeated here.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The check valve is characterized by comprising a first connecting structure (110) for connecting a smoke exhaust pipe and a second connecting structure (120) for connecting a purifying device (200), wherein the first connecting structure (110) and the second connecting structure (120) form an air outlet channel together;

when the smoke exhaust pipe is connected with the first connecting structure (110), the smoke exhaust pipe is communicated with the air outlet channel, and when the purifying device (200) is connected with the second connecting structure (120), the purifying device (200) can purify the gas of the air outlet channel.

2. The check valve according to claim 1, characterized in that a bayonet (122) is provided on the second connecting structure (120), and a locking pin (230) capable of being locked in the bayonet (122) is provided on the purifying device (200).

3. The check valve of claim 2, wherein the locking leg (230) comprises a plug portion and a locking portion connected with each other, the plug portion is connected with the purification device (200), and the locking portion is perpendicular to the plug portion;

when the clamping foot (230) is clamped on the bayonet (122), the inserting part is inserted into the bayonet (122), and the clamping part penetrates through the bayonet (122) and is clamped on one side, far away from the purifying device (200), of the bayonet (122).

4. The check valve according to claim 2 or 3, wherein the first connecting structure (110) is provided with a limiting groove (111), and the smoke exhaust pipe is provided with a first limiting protrusion which can be clamped in the limiting groove (111).

5. The check valve according to claim 4, wherein the limiting groove (111) comprises a transverse groove (112) extending along a circumferential direction of the first connecting structure (110) and a vertical groove (113) disposed at an angle to the transverse groove (112), one end of the vertical groove (113) penetrates through an edge of the first connecting structure (110), and the other end thereof is communicated with the transverse groove (112);

the first limiting protrusion can enter the vertical groove (113) from the edge of the first connecting structure (110) and is clamped in the transverse groove (112) along the circumferential direction of the first connecting structure (110).

6. The check valve according to claim 4, wherein the retainer groove (111) is provided in plurality, and the plurality of retainer grooves (111) are provided at intervals in a circumferential direction of the first connecting structure (110);

and/or the bayonet (122) is provided in a plurality, and the plurality of bayonets (122) are arranged at intervals along the circumferential direction of the second connecting structure (120).

7. The non-return valve in accordance with claim 4, characterized in that the first connecting structure (110) is detachably connected with the second connecting structure (120).

8. The check valve of claim 7, wherein the second connecting structure (120) is provided with a second limiting protrusion (121) which can be clamped in the limiting groove (111).

9. The check valve according to claim 4, characterized in that the first connecting structure (110) and the second connecting structure (120) are fixedly connected or integrally disposed, and the bayonet (122) is disposed on a side of the limiting groove (111) away from the air outlet channel.

10. A range hood, characterized by comprising a body (300), a smoke collecting hood (400) disposed below the body (300), and the check valve (100) of any one of claims 1 to 9, wherein the check valve (100) is connected to an air outlet of the body (300), and an air outlet channel of the check valve (100) is communicated with the air outlet.