CN212455629U

CN212455629U - Check valve of range hood

Info

Publication number: CN212455629U
Application number: CN202021185269.9U
Authority: CN
Inventors: 任富佳; 王丁一; 唐嘉; 于巍巍; 马晓阳
Original assignee: Hangzhou Robam Appliances Co Ltd
Current assignee: Hangzhou Robam Appliances Co Ltd
Priority date: 2020-06-23
Filing date: 2020-06-23
Publication date: 2021-02-02
Anticipated expiration: 2030-06-23

Abstract

The utility model provides a range hood check valve, frame including a plurality of valve blocks and being used for supporting the valve block, the one end of valve block with frame flexible connection, all the other each ends and the laminating of adjacent valve block of valve block. The valve block can be reduced to the greatest extent, the influence of the valve block on the air flow can be reduced when the valve body is in an open state, and meanwhile, the opening moment of the valve block is increased, so that the valve block is easy to push by the air flow and is convenient to exhaust.

Description

Check valve of range hood

Technical Field

The utility model belongs to the technical field of the range hood technique and specifically relates to a range hood check valve is related to.

Background

At present, along with the further improvement of the requirements of people on living standards, the requirements on kitchen environment are also improved, but for a household range hood, an important part is a range hood check valve, the check valve is a part which is arranged for preventing other oil smoke gas flows in a public flue from being poured into the range hood, and generally consists of a valve body, a left valve plate, a right valve plate, a valve seat and a barrier strip, the valve plates on the valve seat are blown away by high-pressure airflow of a fan in the working process of the range hood, the two valve plates begin to have V-shaped angles, and the V-shaped angles can change the airflow direction when the airflow passes through, so that a large amount of airflow loss and vortex noise can be generated when high-speed airflow at an air outlet passes through; moreover, the rotating point is positioned in the middle of the outer frame, so the maximum force arm is positioned at the edge of the frame body of the outer frame, and the wind speed is lower at the position, so that the valve is difficult to open due to too small moment.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a range hood check valve, can minimize when the valve body is in the open mode, the valve block increases the opening moment of valve block to the influence of air current simultaneously for the valve block receives the air current easily and promotes and be convenient for exhaust.

On the one hand, the check valve of the range hood comprises a plurality of valve plates and an outer frame used for supporting the valve plates, one end of each valve plate is flexibly connected with the outer frame, and the other ends of each valve plate are attached to the adjacent valve plates.

Furthermore, the valve plate comprises a damping rubber plate, and one end of the damping rubber plate is bonded with the outer frame.

Furthermore, the valve plate comprises a damping rubber plate, and one end of the damping rubber plate is flexibly connected with the outer frame.

Furthermore, the valve plate further comprises a reinforcing layer and a weighting layer, wherein the reinforcing layer and the weighting layer are respectively located on the end faces of the two sides of the valve plate.

Further, the weighting layer is a galvanized sheet, and/or the reinforcing layer is a polyformaldehyde fiber cloth layer.

Furthermore, the reinforcing layer and the weighting layer are respectively bonded with the damping rubber plate.

Furthermore, the range hood check valve further comprises a supporting pipe used for being connected with an exhaust pipeline of the range hood, the outer frame is arranged in the supporting pipe, and a step structure is arranged on the inner pipe wall of the supporting pipe close to the outer frame.

Furthermore, the non-return device comprises a step structure arranged on the inner pipe wall of the supporting pipe close to the outer frame, and one end face of the step structure close to the outer frame is attached to the corresponding end face of the outer frame.

Furthermore, the side end surfaces of the valve plates are isosceles triangles, the valve plates are the same in size, and the bottom edges of the valve plates are respectively and flexibly connected with the corresponding edges of the outer frame.

Furthermore, the step structure is annular, the outer annular surface of the step structure is fixedly connected with the inner pipe wall of the supporting pipe, and one end face of the outer frame, close to the step structure, is fully attached to the corresponding end face of the step structure.

Furthermore, the outer frame is of a regular polygon structure, each vertex of the outer frame is fixedly connected with the inner pipe wall of the supporting pipe, and each edge of the frame is connected with each valve plate in a one-to-one correspondence mode.

The utility model provides a range hood check valve, its valve block respectively with frame flexible connection, flexible connection utilizes the toughness of material itself promptly, thereby takes place to buckle and produce the pivoted effect receiving the plate of this material when the exogenic action. The valve plate is bent under the action of the airflow, so that the valve plate rotates, the check valve in the closed state is opened, and the airflow is discharged. Because the air current is when passing through range hood exhaust duct, the wind speed that is in pipeline axis department is the biggest, the air current that is close to pipeline inner wall department is limited in the friction of inner wall, air current energy loss is great, therefore the wind speed is lower, opening of range hood check valve relies on the effort promotion of air current, when the air current passes through the frame, the wind speed that is close to the frame middle part is the biggest, compare in traditional two page check valves, its pivot point department is located the middle part of frame, consequently its maximum arm of force is located the frame edge of frame, here is the wind speed less on the contrary, consequently the difficult valve that makes of moment undersize is opened, this scheme is because the pivot of the valve block is located the frame of frame, therefore the valve block is close to wind speed maximum. When the check valve is in an open state, other structures influencing airflow flow do not exist in the space formed by the frame body in a surrounding mode, and vortex noise caused by the change of the airflow direction can be reduced to the maximum extent.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a check valve of a range hood provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an outer frame according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a support tube according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of the valve plate provided by the embodiment of the present invention.

Icon: 1-valve plate; 2-outer frame; 3-supporting a tube; 4-step structure.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that 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.

Examples

The check valve of the range hood shown in fig. 1 to 4 comprises a plurality of valve plates 1 and an outer frame 2 used for supporting the valve plates 1, wherein one end of each valve plate 1 is rotatably connected with the outer frame 2, and other ends of each valve plate 1 are attached to the adjacent valve plates 1. The valve plate 1 is respectively flexibly connected with the outer frame 2, and the flexible connection part is bent due to the acting force of the air flow on the valve plate 1, so that the valve plate 1 rotates, the outer frame 2 which is originally in a closed state is opened, and the air flow can be discharged. Because the air current is when passing through range hood exhaust duct, the wind speed that is in pipeline axis department is the biggest, the air current that is close to pipeline inner wall department is limited by the friction of inner wall, air current energy loss is great, therefore the wind speed is lower, the single term of range hood check valve is opened and is relied on the effort promotion of air current, and frame 2 cup joints with range hood gas pipeline, therefore when the air current passes through frame 2, the wind speed that is close to frame 2 middle part is the biggest, this scheme is because the rotation department of valve block 1 is located the framework of frame 2, consequently valve block 1 is close to the biggest wind speed department, be in great arm of force department, therefore obtain great opening torque, compare in traditional two page check valve, its rotation point department is located the middle part of frame 2, consequently its biggest arm of force is located the framework edge of frame 2, on the contrary.

In an alternative embodiment, the valve plate 1 comprises a damping rubber plate, and one end of the damping rubber plate is bonded with the outer frame 2. This scheme adopts flexible connection's mode, compares in the pivot structure of traditional check valve, and this scheme has avoided causing the pivot structure to glue because the greasy dirt blocks up, leads to causing valve block 1 can not normally open and close or the action is slow.

In an optional embodiment, the valve sheet 1 further includes a reinforcing layer and a weighting layer, and the reinforcing layer and the weighting layer are respectively located on two side end surfaces of the valve sheet 1. The enhancement layer utilizes the difficult deformation's of self characteristics, retrains the damping offset plate, makes it keep the shape, difficult deformation to keep every valve block 1 at initial position. The weight that aggravates the board itself has can make check valve block 1 itself have certain quality to after the lampblack absorber stop operation, can descend the playback with the help of self quality, thereby prevent external backward flow oil smoke entering.

In an alternative embodiment, the weighting layer is a galvanized sheet and the reinforcing layer is a polyoxymethylene fiber cloth layer. The polyformaldehyde fiber cloth can also be replaced by other fiber cloth with certain tensile strength and oil resistance. The galvanized plate is a common material for forming the check valve plate 1.

In an alternative embodiment, the reinforcing layer and the weighting layer are respectively bonded to the damping rubber plate. The upper layer is polyformaldehyde fiber cloth layer, is woven by polyformaldehyde fiber and forms, and the middle level is damping offset plate, and the lower floor is galvanized sheet, and the damping offset plate can adhere well between galvanized sheet and polyformaldehyde fiber cloth layer, bonds the two well fixedly.

In an optional embodiment, the range hood check valve further comprises a support pipe 3 for connecting with an exhaust duct of the range hood, the outer frame 2 is arranged in the support pipe 3, and a step structure 4 is arranged on an inner wall of the support pipe 3 near the outer frame 2.

In an alternative embodiment, a step structure 4 is arranged on the inner pipe wall of the support pipe 3 near the outer frame 2, and an end face of the step structure 4 near the outer frame 2 is fitted with a corresponding end face of the outer frame 2. The step structure 4 has the function that when the household range hood is in standby, if the condition that oil smoke does not flow backwards in the public flue is met, the valve plate 1 cannot be flushed away by air flow in the public flue due to the blocking of the step structure 4, so that external oil smoke is effectively blocked.

In an alternative embodiment, the side end surfaces of the valve plates 1 are isosceles triangles, the sizes of the valve plates 1 are the same, and the bottom edges of the valve plates 1 are respectively flexibly connected with the corresponding edges of the outer frame 2. The valve plates 1 with the same size are respectively flexibly connected with the corresponding edges of the outer frame 2, so that the top points of the valve plates 1 are converged at the center of the outer frame 2, the wind speed is the largest, the valve plates 1 can be guaranteed to be under the same wind pressure effect, and the effect of synchronous opening and closing of the valve plates 1 is finally achieved.

In an alternative embodiment, the step structure 4 is annular, the outer annular surface of the step structure 4 is fixedly connected with the inner pipe wall of the support pipe 3, and one end surface of the outer frame 2 close to the step structure 4 is fully attached to the corresponding end surface of the step structure 4. There may be the clearance between the limit of frame 2 and the interior pipe wall, and annular stair structure 4 can carry out the shutoff with the clearance when laminating frame 2, and this scheme is because the frame 2 is close to the one end terminal surface of stair structure 4 and laminates on stair structure 4's the corresponding terminal surface completely, therefore the clearance between frame 2 and the interior pipe wall receives the shutoff of stair structure 4 completely.

In an alternative embodiment, the outer frame 2 has a regular polygon structure, each vertex of the outer frame 2 is fixedly connected to the inner pipe wall of the support pipe 3, and each side of the outer frame 2 is connected to each valve plate 1 in a one-to-one correspondence. Regular polygon guarantees that each valve block 1 receives the same wind pressure effect, finally reaches the effect that each valve block 1 opened and shut in step, and regular polygon's limit is connected with valve block 1 simultaneously, has guaranteed the flat state of valve block 1.

The check valve of the range hood in the scheme is communicated with an exhaust pipeline of the range hood through a supporting pipe 3, the supporting pipe 3 is vertically placed, a circle of annular step structures 4 are arranged in the supporting pipe 3, the outer ring surface of each step structure 4 is fixedly connected with the inner pipe wall of the supporting pipe 3, a regular decagon outer frame 2 is arranged above the step structures 4 in the supporting pipe 3, the inner pipe wall of the supporting pipe 3 is inscribed in a frame body of the outer frame 2, ten vertexes of the outer frame 2 are respectively fixedly connected with the inner pipe wall of the supporting pipe 3, one end face, close to the step structures 4, of the outer frame 2 is completely attached to the corresponding end face of the step structures 4, gaps between the outer frame 2 and the inner pipe wall of the supporting pipe 3 are completely blocked by the step structures 4, and when airflow passes through the positions in the supporting pipe 3, the. Be equipped with ten valve blocks 1 in the frame 2, valve block 1 is big isosceles triangle completely, every valve block 1 all is by polyformaldehyde fiber cloth layer, damping offset plate and galvanized sheet range upon range of and forms, wherein the upper strata is polyformaldehyde fiber cloth layer, weave by polyformaldehyde fiber and form, the middle level is the damping offset plate, the lower floor is the galvanized sheet, bond polyformaldehyde fiber cloth layer and galvanized sheet together through the damping offset plate, and the damping offset plate of the base department of valve block 1 bonds with the corresponding limit of frame 2, every valve block 1 corresponds the limit of each frame 2, be close to frame 2 department at the damping offset plate, there is not the galvanized sheet. When ten valve blocks 1 are completely connected with the outer frame 2, the valve blocks 1 can seal the outer frame 2 through the attachment between the valve blocks 1 and the adjacent valve blocks 1, the damping rubber plate can be bent under the action of external force, and the joint of the valve blocks 1 and the outer frame 2 is not rigidly supported by a galvanized plate, so that the valve blocks 1 and the outer frame 2 are in a flexible connection state, and the valve blocks 1 can rotate around the bent parts of the valve blocks, so that the outer frame 2 is opened or closed. Due to the existence of the step structure 4, the rotation of the other side of the valve plate 1 is blocked by the step structure 4, so that the valve plate 1 can only be opened and closed in a one-way mode.

When the air current flows from the blast pipe, strike valve block 1 of check valve, make valve block 1 rotate, frame 2 is in the open mode, thereby effectively air exhaust, when the air current disappears, valve block 1 falls back under self action of gravity, frame 2 seals, when domestic range hood standby, if meet the condition that does not the oil smoke flows backward in the public flue, because the blockking of stair structure 4, valve block 1 can not take place to rotate, consequently can not be washed away by the air current in the public flue, thereby the external oil smoke of effectual separation.

In the description of the embodiments of the present invention, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically 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 for those skilled in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "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 and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Finally, it should be noted that: the above embodiments are only specific embodiments of the present invention, and are not intended to limit the technical solution of the present invention, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: those skilled in the art can still modify or easily conceive of changes in the technical solutions described in the foregoing embodiments or make equivalent substitutions for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The check valve of the range hood is characterized by comprising a plurality of valve plates (1) and an outer frame (2) used for supporting the valve plates (1), wherein one end of each valve plate (1) is flexibly connected with the outer frame (2), and the other ends of each valve plate (1) are attached to the adjacent valve plates (1).

2. The check valve of the range hood according to claim 1, characterized in that the side end surfaces of the valve plates (1) are isosceles triangles, the valve plates (1) have the same size, and the bottom edges of the valve plates (1) are respectively flexibly connected with the outer frame (2).

3. The check valve of range hood according to claim 1, characterized in that the check valve of range hood further comprises a support pipe (3) for connecting with an exhaust duct of range hood, the outer frame (2) is disposed in the support pipe, and a step structure (4) is disposed on an inner wall of the support pipe (3) near the outer frame (2).

4. The check valve of the range hood according to claim 1, wherein the valve plate (1) comprises a damping rubber plate, and one end of the damping rubber plate is bonded with the outer frame (2).

5. The check valve of the range hood according to claim 4, wherein the valve plate (1) further comprises a reinforcing layer and a weighting layer, and the reinforcing layer and the weighting layer are respectively located on two side end surfaces of the valve plate (1).

6. The check valve of the range hood according to claim 5, wherein the weighting layer is a galvanized sheet, and/or the reinforcing layer is a polyformaldehyde fiber cloth layer.

7. The check valve of the range hood according to claim 5, wherein the reinforcing layer and the weighting layer are respectively bonded to the damping rubber plate.

8. The check valve of the range hood according to claim 3, characterized in that an end surface of the step structure (4) close to the outer frame (2) is attached to a corresponding end surface of the outer frame (2).

9. The check valve of the range hood according to claim 8, wherein the step structure (4) is annular, the outer annular surface of the step structure (4) is fixedly connected with the inner pipe wall of the support pipe (3), and the end surface of the outer frame (2) near the step structure (4) is substantially fit with the corresponding end surface of the step structure (4).

10. The check valve of the range hood according to claim 9, wherein the outer frame (2) has a regular polygon structure, each vertex of the outer frame (2) is fixedly connected to the inner wall of the support tube (3), and each side of the outer frame (2) is correspondingly connected to each valve plate (1).