CN220134694U - Check valve and range hood - Google Patents

Abstract

The utility model relates to a check valve and a range hood. The inner shell is arranged in the outer shell in a penetrating way and is arranged at intervals with the outer shell to form a cavity. The inner shell is provided with a plurality of through holes communicated with the cavity, the inner wall of the inner shell is enclosed to form an airflow channel, and the bottom of the inner shell is provided with at least one oil leakage port. The sound absorbing material is disposed in the cavity. On one hand, the inner shell and the outer shell are sleeved, a plurality of through holes are arranged on the inner shell, and sound absorbing materials are arranged in the space formed by the inner shell and the outer shell, so that noise can be effectively reduced; on the other hand, the oil drops generated in the process that the smoke discharged from the smoke outlet of the smoke machine body flows through the airflow channel enter the cavity through the through hole, are attached to the sound absorbing material, flow downwards under the self gravity and are converged at the bottom of the check valve, enter the fan through the oil leakage hole and are collected by the fan, the visible oil way is designed in the cavity formed by the inner shell and the outer shell, and no oil way exists outside, so that the leakage risk of oil stains is greatly reduced.

Description

Check valve and range hood

Technical Field

The utility model relates to the technical field of range hoods, in particular to a check valve and a range hood.

Background

Most of the range hoods use a centrifugal fan as a main power source, an impeller is driven to rotate by a motor to do work, negative pressure is generated in the center of the fan under the action of centrifugal force, smoke is sucked from an air inlet, and the smoke is accelerated by the fan and is discharged to an external smoke outlet through a check valve. The check valve is an important component of the range hood, and the smoke is mainly discharged to the smoke pipe through the check valve and finally discharged to an external airflow channel. On one hand, the outlet flue gas flow velocity is large, so that large noise is easily generated at the check valve; on the other hand, oil droplets generated by the smoke at the check valve penetrate to the outside of the check valve, resulting in the risk of oil leakage.

Disclosure of Invention

The first technical problem to be solved by the present utility model is to provide a check valve which can effectively reduce noise while reducing the risk of leakage of oil stains.

The second technical problem to be solved by the utility model is to provide a range hood which can effectively reduce noise and reduce the risk of leakage of oil stains.

The first technical problem is solved by the following technical scheme:

a check valve, the check valve comprising:

a housing;

the inner shell is arranged in the outer shell in a penetrating way, a cavity is formed between the inner shell and the outer shell at intervals, a plurality of through holes communicated with the cavity are formed in the inner shell, an air flow channel is formed by enclosing the inner wall of the inner shell, and at least one oil leakage port is formed in the bottom of the inner shell;

and the sound absorbing material is arranged in the cavity.

Compared with the background technology, the check valve has the beneficial effects that:

on one hand, the check valve adopts a mode of sleeving the inner shell and the outer shell, a plurality of through holes are arranged on the inner shell, and sound absorbing materials are arranged in a space formed by the inner shell and the outer shell, so that noise can be effectively reduced; on the other hand, the oil drops generated in the process that the smoke discharged from the smoke outlet of the smoke machine body flows through the airflow channel enter the cavity through the through hole, are attached to the sound absorbing material, flow downwards under the self gravity and are converged at the bottom of the check valve, enter the fan through the oil leakage hole and are collected by the fan, the visible oil way is designed in the cavity formed by the inner shell and the outer shell, and no oil way exists outside, so that the leakage risk of oil stains is greatly reduced.

In one embodiment, the bottom of the inner shell is provided with a supporting plate in a surrounding mode, and the bottom end of the outer shell is overlapped on the circumferential outer edge of the supporting plate.

In one embodiment, a first positioning step is arranged on the circumferential outer edge of the supporting plate, and a second positioning step which is mutually in butt fit with the first positioning step is arranged at the bottom end of the shell.

In one embodiment, a plane perpendicular to the central axis of the check valve is set as a reference plane, the top surface of the support plate and the reference plane form an included angle, and a side position of the top surface of the support plate, which is close to the housing, is higher than a side position of the top surface of the support plate, which is far away from the housing.

In one embodiment, a plurality of spaced limiting portions are circumferentially arranged on the top of the outer shell, and each limiting portion is in mutual abutting connection with the inner wall of the inner shell.

In one embodiment, all the limiting parts are arranged at the top of the shell at equal intervals.

In one embodiment, the oil leakage holes are arranged in a plurality of the oil leakage holes; all oil leakage ports are arranged at the bottom of the inner shell at equal intervals.

In one embodiment, the through holes are circular holes, and the kind of aperture of the through holes is one or more.

In one embodiment, the top end of the housing is adapted to be connected to a smoke evacuation tube and the bottom end of the housing is adapted to be connected to the top of the body of the machine.

The second technical problem is solved by the following technical scheme:

the range hood comprises a check valve and a range hood body, wherein the range hood body is provided with a smoke outlet, and the check valve is arranged at the smoke outlet.

Compared with the background technology, the range hood provided by the utility model has the beneficial effects that:

on one hand, the range hood adopts the mode of sleeving the inner shell and the outer shell, a plurality of through holes are arranged on the inner shell, and sound absorbing materials are arranged in the space formed by the inner shell and the outer shell, so that noise can be effectively reduced; on the other hand, the oil drops generated in the process that the smoke discharged from the smoke outlet of the smoke machine body flows through the airflow channel enter the cavity through the through hole, are attached to the sound absorbing material, flow downwards under the self gravity and are converged at the bottom of the check valve, enter the fan through the oil leakage hole and are collected by the fan, the visible oil way is designed in the cavity formed by the inner shell and the outer shell, and no oil way exists outside, so that the leakage risk of oil stains is greatly reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a block diagram of a range hood according to an embodiment of the present utility model.

Fig. 2 is a sectional view of a check valve according to an embodiment of the present utility model.

Fig. 3 is an enlarged schematic view of the structure of fig. 2 at a.

Fig. 4 is another sectional view of a check valve according to an embodiment of the present utility model.

Fig. 5 is an enlarged schematic view of the structure of fig. 4 at B.

Fig. 6 is a bottom view of a check valve according to an embodiment of the present utility model.

Reference numerals:

10. a check valve; 11. a housing; 111. a second positioning step; 112. a limit part; 12. an inner case; 121. a through hole; 122. an air flow channel; 123. an oil leakage port; 124. a support plate; 1241. a first positioning step; 1242. a top surface; 13. a sound absorbing material; 14. a valve plate; 15. a cavity; 20. a smoke machine body; 21. and a smoke outlet.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

Referring to fig. 1 to 3 and 6, fig. 1 shows a structure diagram of a range hood according to an embodiment of the present utility model. Fig. 2 shows a cross-sectional structural view of the check valve 10 according to an embodiment of the present utility model. Fig. 3 shows an enlarged schematic view of the structure of fig. 2 at a. Fig. 6 shows a bottom view of the check valve 10 according to an embodiment of the present utility model. A check valve 10 according to an embodiment of the present utility model, the check valve 10 includes: an outer shell 11, an inner shell 12, a sound absorbing material 13 and a valve sheet 14. The inner shell 12 is arranged in the outer shell 11 in a penetrating way, a cavity 15 is formed between the inner shell 12 and the outer shell 11, a plurality of through holes 121 communicated with the cavity 15 are formed in the inner shell 12, an air flow channel 122 is formed by surrounding the inner wall of the inner shell 12, and at least one oil leakage hole 123 is formed in the bottom of the inner shell 12. The sound absorbing material 13 is provided in the cavity 15. The valve plate 14 is connected to the outer casing 11 or the inner casing 12 and is openably provided at an outlet of the air flow passage 122, and an inlet of the air flow passage 122 is used to communicate with the smoke outlet 21 of the smoke machine body 20.

On the one hand, the check valve 10 adopts the form of sleeving the inner shell 12 and the outer shell 11, a plurality of through holes 121 are arranged on the inner shell 12, and a sound absorbing material 13 is arranged in the space formed by the inner shell 12 and the outer shell 11, so that noise can be effectively reduced; on the other hand, the oil droplets generated in the process that the smoke discharged from the smoke outlet 21 of the smoke machine body 20 flows through the airflow channel 122 enter the cavity 15 through the through hole 121, adhere to the sound absorbing material 13, flow downwards under the gravity of the oil droplets and are converged at the bottom of the check valve 10, enter the fan through the oil leakage port 123 and are collected by the fan, the visible oil path is designed in the cavity 15 formed by the inner shell 12 and the outer shell 11, and no oil path exists outside, so that the oil stain leakage risk is greatly reduced.

When the smoke outlet 21 of the smoke machine body 20 is provided with smoke to be discharged outwards, the driving valve plate 14 is opened under the thrust action of the smoke; when no smoke is present, the valve plate 14 is in a closed state, preventing smoke from flowing back into the smoke machine body 20 through the check valve 10.

Referring to fig. 2 and 3, in one embodiment, the bottom of the inner shell 12 is provided with a supporting plate 124, and the bottom end of the outer shell 11 is overlapped on the circumferential outer edge of the supporting plate 124. In this way, the inner shell 12 and the outer shell 11 are assembled and fixed to each other by the support plate 124. In addition, the support plate 124 is located at the bottom of the cavity 15, and serves as a seal to prevent oil drops inside the cavity 15 from falling down to the outside of the check valve 10.

Referring to fig. 2 and 3, in one embodiment, a first positioning step 1241 is disposed on a circumferential outer edge of the support plate 124, and a second positioning step 111 that is in abutting engagement with the first positioning step 1241 is disposed at a bottom end of the housing 11. In this way, the first positioning step 1241 and the second positioning step 111 abut against each other, so that the housing 11 can be positioned, and the mounting accuracy of the two can be improved.

Alternatively, the shape of the first positioning step 1241 and the shape of the second positioning step 111 are adapted to each other, so that the mounting accuracy is high after the outer housing 11 and the inner housing 12 are assembled.

Referring to fig. 2 and 3, in one embodiment, a plane perpendicular to the central axis O of the check valve 10 is set as a reference plane M, the top surface 1242 of the support plate 124 is disposed at an angle with respect to the reference plane M, and the range hood is installed in a normal posture in a working environment, such as a kitchen, that is, when the reference plane is disposed parallel to a horizontal plane, a side position of the top surface 1242 of the support plate 124 close to the housing 11 is higher than a side position of the top surface 1242 of the support plate 124 far from the housing 11. Thus, when the oil drops in the cavity 15 fall onto the top surface 1242 of the supporting plate 124 under the action of gravity, the top surface 1242 of the supporting plate 124 is obliquely arranged, and is high near one side of the outer shell 11, and low near one side of the inner shell 12, so that the oil drops flow towards the oil leakage opening 123 of the inner shell 12 and enter the fan, and thus, the oil drops can be prevented from flowing towards the outer shell 11, and the risk of outward leakage of oil stains is reduced.

It should be noted that, the included angle between the top surface 1242 of the support plate 124 and the reference surface M is set to be a, and the included angle a includes, but is not limited to, 0 ° to 60 °, specifically, for example, values of 1 °, 5 °, 10 °, 15 °, 20 °, 30 °, 45 °, 60 °, and the like, and of course, any value greater than 60 ° may be also used, and specifically, the included angle a may be flexibly adjusted and set according to actual requirements.

It should be noted that, the "support plate 124" may be "a part of the inner shell 12", that is, the "support plate 124" is integrally formed with "other parts of the inner shell 12"; or may be a separate component from the remainder of the inner housing 12, i.e., the support plate 124 may be manufactured separately and then integrated with the remainder of the inner housing 12.

Referring to fig. 3, in one embodiment, the top surface 1242 of the support plate 124 is located higher than the oil leakage hole 123 near one side of the housing 11, so that when oil drops flow to the oil leakage hole 123 along the top surface 1242 of the support plate 124, all the oil drops are discharged through the oil leakage hole 123, and the oil drops are prevented from leaking out of the housing 11 through one side of the top surface 1242 of the support plate 124 near the housing 11 after converging above the top surface 1242 of the support plate 124. Therein, as an alternative, the oil leakage opening 123 is specifically disposed on a side of the top surface 1242 of the support plate 124 away from the outer shell 11, that is, on a position where the support plate 124 and the inner shell 12 are butted against each other.

Referring to fig. 3, in one embodiment, at least one reinforcing rib is further disposed on the supporting plate 124, so as to increase the structural strength of the supporting plate 124.

Referring to fig. 4 and 5, fig. 4 shows another cross-sectional view of the check valve 10 according to an embodiment of the present utility model. Fig. 5 shows an enlarged schematic view of the structure of fig. 4 at B. In one embodiment, a plurality of spaced apart retainers 112 are circumferentially disposed on the top of the housing 11. Each of the limiting portions 112 abuts against the inner wall of the inner case 12. In this way, the outer shell 11 is respectively abutted against the inner wall of the inner shell 12 through the limiting parts 112, so that the installation accuracy is improved when the outer shell 11 and the inner shell 12 are mutually assembled together, the concentricity is ensured, and the wind noise increase or the howling abnormal sound caused by the dislocation of the inner shell 12 and the outer shell 11 can be avoided.

In one embodiment, all the limiting parts 112 may be disposed at the top of the outer shell 11 at equal intervals, so that the stress at each position is uniform, and the outer shell 11 and the inner shell 12 are mutually assembled stably; or may be provided at the top of the housing 11 at unequal intervals.

It should be noted that, the "limiting portion 112" may be "a part of the housing 11", that is, the "limiting portion 112" and "other parts of the housing 11" are integrally formed; or a separate component which is separable from the other part of the housing 11, namely, the limit part 112 can be manufactured independently and then combined with the other part of the housing 11 into a whole.

Alternatively, the limiting portion 112 includes, but is not limited to, a buckle, a clamping member, etc. integrally provided on the outer shell 11, and the limiting portion 112 and the inner wall of the outer shell 11 are formed with a clamping hole, into which the top end of the inner shell 12 is clamped, so as to achieve rapid and stable assembly with the outer shell 11.

In some embodiments, the housing 11 is integrally formed, and has a simple structure, no need of splicing sealing elements, convenient assembly, high sealing performance and low cost.

Referring to fig. 3 and 6, in one embodiment, one or more oil leakage ports 123 are provided. Specifically, the oil leakage ports 123 in the present embodiment are provided in plurality, and the oil leakage ports 123 are disposed at the bottom of the inner casing 12 at equal intervals, for example, so that the oil discharge effect at the bottom of the cavity 15 is relatively uniform. Of course, the respective oil drain ports 123 may be disposed at unequal intervals on the bottom of the inner case 12.

In some embodiments, the shape of the oil drain port 123 includes, but is not limited to, a strip-shaped port or other shaped opening along the bottom edge of the inner shell 12, and the specific shape can be flexibly adjusted and set according to actual requirements.

Referring to fig. 3 and 6, in some embodiments, the shape of the through hole 121 includes, but is not limited to, a regular hole such as a circular hole, an elliptical hole, a polygonal hole, and an irregular hole, which can be flexibly adjusted and set according to practical requirements.

In one embodiment, the through holes 121 are, for example, circular holes, and the kind of aperture of the through holes 121 is set to one or more. The pore size is, for example, two, three or any other pore size. In this embodiment, the apertures of the through holes 121 shown in fig. 2 or fig. 4 are specifically two, so that the noise reduction effect is better, and meanwhile, the processing and manufacturing can be facilitated because the types of the through holes 121 are fewer, and the processing difficulty caused by the excessive types of the through holes 121 is avoided.

It should be noted that, in the related art, the smoke exhaust pipe is generally directly mounted on the inner shell 12, and an external force acts on the inner shell 12 during the mounting process of the smoke exhaust pipe, which will cause the inner shell 12 and the outer shell 11 to generate a relative displacement, thereby breaking the sealing mechanism and causing leakage of oil stains.

Referring to fig. 2 and 3, in one embodiment, the top end of the housing 11 is adapted to be connected to a smoke evacuation tube, and the bottom end of the housing 11 is adapted to be connected to the top of the smoke evacuation body 20. Thus, on the one hand, the inner housing 12 provides the air flow passage 122, and the outer housing 11 provides the seal, which can improve the sealing property, so that oil droplets and air flow in the check valve 10, and abnormal sounds caused by oil leakage and air flow leakage are avoided. On the other hand, compared with the mode of installing the smoke exhaust pipe on the inner shell 12, the method can avoid the defect that the sealing mechanism is damaged to cause leakage of oil stains due to relative displacement between the inner shell 12 and the outer shell 11 caused by the action of external force in the smoke exhaust pipe installation process, and the oil stains can not leak to the outside of the outer shell 11 due to the fact that the oil path is completely designed on the inner side of the outer shell 11 although the external force is acted in the installation process when the smoke exhaust pipe is installed on the outer shell 11.

In some embodiments, the sound absorbing material 13 includes, but is not limited to, absorbent cotton or other sound absorbing material 13.

Referring to fig. 3, in some embodiments, the space between the inner shell 12 and the outer shell 11 is set to be S, and the space S includes, but is not limited to, 10mm-20mm, for example, 10mm, 12mm, 13mm, 14mm, 15mm, 17mm, 18mm, 19mm, 20mm, or any value smaller than 10mm and larger than 20mm, which can be flexibly adjusted and set according to practical requirements.

In one embodiment, a range hood comprises the check valve 10 of any one of the embodiments, and further comprises a hood body 20, wherein the hood body 20 is provided with a smoke outlet 21, and the check valve 10 is arranged at the smoke outlet 21.

In the above-mentioned range hood, on one hand, the inner casing 12 and the outer casing 11 are sleeved, and the plurality of through holes 121 are arranged on the inner casing 12, and the sound absorbing material 13 is arranged in the space formed by the inner casing 12 and the outer casing 11, so that noise can be effectively reduced; on the other hand, the oil droplets generated in the process that the smoke discharged from the smoke outlet 21 of the smoke machine body 20 flows through the airflow channel 122 enter the cavity 15 through the through hole 121, adhere to the sound absorbing material 13, flow downwards under the gravity of the oil droplets and are converged at the bottom of the check valve 10, enter the fan through the oil leakage port 123 and are collected by the fan, the visible oil path is designed in the cavity 15 formed by the inner shell 12 and the outer shell 11, and no oil path exists outside, so that the oil stain leakage risk is greatly reduced.

In the description of the present utility model, it should be understood that, if any, these terms "center," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," "circumferential," etc., are used in the direction or relationship of positions indicated by these terms based on the directions or relationships of positions shown in the drawings, merely to facilitate describing the present utility model and simplify the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. A check valve (10), characterized in that the check valve (10) comprises:

a housing (11);

the inner shell (12) is arranged in the outer shell (11) in a penetrating mode, a cavity (15) is formed between the inner shell (12) and the outer shell (11), a plurality of through holes (121) communicated with the cavity (15) are formed in the inner shell (12), an airflow channel (122) is formed by encircling the inner wall of the inner shell (12), and at least one oil leakage opening (123) is formed in the bottom of the inner shell (12);

and a sound absorbing material (13), wherein the sound absorbing material (13) is arranged in the cavity (15).

2. The check valve (10) of claim 1, wherein a support plate (124) is circumferentially provided around the bottom of the inner housing (12), and the bottom end of the outer housing (11) is overlapped on the circumferential outer edge of the support plate (124).

3. The check valve (10) according to claim 2, wherein a first positioning step (1241) is provided on a circumferential outer edge of the support plate (124), and a second positioning step (111) which is in abutting engagement with the first positioning step (1241) is provided at a bottom end of the housing (11).

4. The check valve (10) according to claim 2, wherein a plane perpendicular to a central axis of the check valve (10) is set as a reference plane, a top surface (1242) of the support plate (124) is disposed at an angle to the reference plane, and a side position of the top surface (1242) of the support plate (124) close to the housing (11) is higher than a side position of the top surface (1242) of the support plate (124) away from the housing (11).

5. The check valve (10) of claim 1, wherein a plurality of spaced-apart limit portions (112) are circumferentially provided on the top of the outer housing (11), each limit portion (112) abutting against the inner wall of the inner housing (12).

6. The check valve (10) of claim 5, wherein all of the limit portions (112) are disposed at equal intervals on top of the housing (11).

7. The check valve (10) of claim 1, wherein the oil leakage port (123) is provided in plurality; all the oil leakage openings (123) are arranged at equal intervals at the bottom of the inner shell (12).

8. The check valve (10) according to claim 1, wherein the through hole (121) is provided as a circular hole, and the kind of hole diameter of the through hole (121) is provided as one or more.

9. The non-return valve (10) in accordance with any one of claims 1 to 8 wherein the top end of the housing (11) is adapted to be connected to a smoke evacuation tube and the bottom end of the housing (11) is adapted to be connected to the top of the smoke machine body (20).

10. A range hood, characterized in that the range hood comprises a check valve (10) according to any one of claims 1 to 9, and further comprises a range hood body (20), wherein the range hood body (20) is provided with a smoke outlet (21), and the check valve (10) is arranged at the smoke outlet (21).