CN210047813U

CN210047813U - Multi-effect exhaust valve for vacuum compression bag pumping and exhausting

Info

Publication number: CN210047813U
Application number: CN201920644572.1U
Authority: CN
Inventors: 钱建锋
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-05-07
Filing date: 2019-05-07
Publication date: 2020-02-11
Anticipated expiration: 2029-05-07

Abstract

The utility model solves the defect of unsmooth exhaust of the exhaust valve in the prior art, and provides a multi-effect exhaust valve for vacuum compression bag pumping, which comprises a valve seat, an exhaust sealing cover and a valve cover; the valve seat comprises a base, a fixed seat and a vent hole, wherein the fixed seat is positioned on the base, and the vent hole is positioned at the top end of the fixed seat; the exhaust sealing cover is positioned between the valve seat and the valve cover and covers the valve seat, and the valve seat is connected with the valve cover in a buckling mode. The utility model discloses simple structure, design scientific and reasonable, it is smooth and easy to exhaust, does benefit to popularization and application.

Description

Multi-effect exhaust valve for vacuum compression bag pumping and exhausting

Technical Field

The utility model belongs to vacuum compression equipment for packing field, concretely relates to vacuum compression bag pump drainage multiple-effect discharge valve.

Background

Vacuum compression packaging refers to a packaging method in which a product is added into an airtight packaging container, and air inside the container is evacuated to achieve a predetermined degree of vacuum in the sealed container. Because the vacuum container is in a highly reduced pressure state, the air is rare and is equivalent to the effect of low oxygen, so that the microorganisms have no living condition, the shelf life of the food can be effectively prolonged, and the food is prevented from mildewing, decaying and deteriorating. In addition, the cotton quilt is also used for containing cotton quilts, various clothes and the like, the air in the cotton quilts and clothes is pumped away, and the originally expanded cotton quilts and other articles are flattened by utilizing the atmospheric pressure, so that the volume is reduced, the space is saved, and the effects of dust prevention, mildew prevention, moisture prevention and insect prevention are achieved. The multiple-effect exhaust valve of prior art vacuum compression bag pump drainage passes through the lock structure with the opening involution for form airtight structure in the compression bag, then through one-way exhaust valve extraction air, the extraction air goes on through the aspiration pump, and the vacuum pump damages or under outdoor environment, and people can't enjoy the facility that vacuum packaging bag brought. In order to solve the technical defects in the prior art, the structure of the exhaust valve is improved in the prior art, for example, in chinese patent CN 206456728U, "an exhaust and evacuation dual-purpose vacuum bag air faucet", a guide post is arranged on the back of an air plug, and a guide structure matched with the guide post is arranged on an air faucet body. But this kind of technique also has certain defect, guide post and the air cock at the air cock back are a body structure, adopt same material to make, if the material is too soft, the deformation of air cock is discharged and can be guaranteed, but the guide post is out of shape easily, influence the smooth and easy motion of air in the air cock intracavity, if the material is too hard, the air cock is discharged and sealed effect just is relatively poor, moreover, because air cock and guide post combine together, the combination structure of the two of be is heavier, need great pressure just can rise the air cock and make the air follow the air cock discharge, such structure is unfavorable for gaseous smooth and easy discharge.

SUMMERY OF THE UTILITY MODEL

In order to solve the defect that the exhaust of the exhaust valve is not smooth and easy in the prior art, the utility model provides a vacuum compression bag pump drainage multiple-effect exhaust valve which exhausts smoothly.

The vacuum compression bag pumping and exhausting multi-effect exhaust valve is adhered to the wall of the vacuum compression bag, an adhesion hole is formed in the wall of the vacuum compression bag, and the vacuum compression bag pumping and exhausting multi-effect exhaust valve is partially adhered to the inner wall of the vacuum compression bag and partially protrudes out of the wall of the vacuum compression bag.

The utility model provides a technical scheme that its technical problem adopted as follows: a multi-effect exhaust valve for vacuum compression bag pumping comprises a valve seat, an exhaust sealing cover and a valve cover; the valve seat comprises a base, a fixed seat and a vent hole, wherein the fixed seat is positioned on the base, and the vent hole is positioned at the top end of the fixed seat; the exhaust sealing cover is positioned between the valve seat and the valve cover and covers the valve seat, and the valve seat is connected with the valve cover in a buckling mode. The valve seat further comprises an air guide column, the air guide column penetrates through the fixing seat, the upper end of the air guide column protrudes out of the upper end of the fixing seat, the lower end of the air guide column protrudes out of the bottom end of the base, and a through hole is formed in the connecting part of the air guide column and the fixing seat and is an air vent.

The air guide column also comprises more than one column air guide sheet; the air guide column preferably comprises more than two air guide sheets, and also comprises a column core, wherein the column air guide sheets are uniformly distributed along the column core; the number of the column air guide sheets is preferably 4; one side of the column air guide sheet is fixed on the column core and is uniformly distributed along the same circle; as the most preferable structure of 4 column air guide plates, the included angle between each column air guide plate and the adjacent column air guide plate is 90 degrees. The column air guide sheet is L-shaped, semicircular, a shape formed by vertically overlapping two arcs, a shape formed by combining a trapezoid, a right trapezoid and a rectangle, and the like.

Furthermore, the valve seat further comprises a positioning cap, the positioning cap is positioned at the top end of the air guide column, the positioning cap is in a circular sheet shape, preferably, a valve seat positioning point is arranged at the circle center of the top end of the positioning cap, and the valve seat positioning point is in a concave arc shape.

The fixing seat comprises a fixing seat top and a fixing seat wall, the fixing seat wall is cylindrical, the fixing seat top is in a circular sheet shape, the diameter of the fixing seat top is larger than that of the fixing seat wall, and a concave fixing groove is formed among the fixing seat top, the fixing seat wall and the base.

The exhaust sealing cover is arc-shaped, and the diameter of the arc-shaped outer edge is smaller than or equal to that of the fixed seat and larger than that of the vent hole; the exhaust sealing cover is reversely buckled on the valve seat and covers the vent hole; or the exhaust sealing cover is in a reversed bowl shape and comprises a bowl edge, a bowl wall and a bowl bottom, and the diameter of the bowl edge is smaller than or equal to that of the fixed seat and larger than that of the vent hole; the exhaust sealing cover is buckled on the valve seat and covers the vent hole.

The exhaust sealing cover also comprises an inner positioning point and an outer positioning point, wherein the inner positioning point is positioned on the inner wall of the circle center of the top end of the exhaust sealing cover and is in a convex arc shape; the outer wall of the circle center of the top end of the exhaust sealing cover is provided with a sunken arc-shaped outer positioning point, the outer positioning point is opposite to the upper positioning point on the valve cover, and the inner positioning point is opposite to the valve seat positioning point; an upper positioning point is arranged at the circle center of the inner wall of the top end of the valve cover and is in a convex arc shape. Under the static state, the inner positioning point is nested and connected with the positioning point of the valve seat, under the state of air exhaust or air exhaust, the exhaust sealing cover is flushed by air flow, the outer positioning point is nested and connected with the upper positioning point on the valve cover under a certain condition, the positioning point is better ensured, incomplete sealing of the vent hole caused by dislocation of the exhaust sealing cover is avoided, and air leakage is also avoided.

The exhaust sealing cover also comprises a fixing protrusion, the fixing protrusion is positioned on the inner wall of the exhaust sealing cover, the fixing protrusion forms a convex ring along the inner wall of the exhaust sealing cover, and the diameter of the inner wall of the exhaust sealing cover at the bottom of the convex ring is slightly larger than that of the positioning cap; the diameter of the convex ring is close to that of the positioning cap. The diameter of the convex ring is close to that of the positioning cap, namely the diameter of the top end of the convex ring is slightly larger than, slightly smaller than or equal to that of the positioning cap; the exhaust sealing cover is made of a silica gel material, has certain elasticity, and can be smoothly inserted into the groove formed by the fixing protrusion when the diameter of the exhaust sealing cover is equal to or slightly smaller than the diameter of the positioning cap; when the diameter of the convex ring is slightly larger than that of the positioning cap, the top end of the exhaust sealing cover is nested outside the positioning cap and cannot be separated from the positioning cap, all parts are used during exhaust, the exhaust sealing cover is limited not to be blown and displaced by airflow, and the exhaust effect can be well played. The utility model discloses a slightly be greater than or slightly be less than 2mm than finger difference in height or radius difference.

The valve cover comprises a valve cover wall and a valve cover top, the valve cover wall is cylindrical, the valve cover top is in a hollow arc shape, and the valve cover wall and the valve cover top are fixedly connected and are of an integrated structure. An upper positioning point is arranged at the circle center of the inner wall of the top end of the valve cover and is in a convex arc shape. The valve cap top is arc-shaped, so that gas can be conveniently discharged, the exhaust sealing cover can be limited, and displacement caused by excessive exhaust gas flow is avoided.

The bottom end of the inner wall of the valve cover wall is protruded, the protruded part and the valve cover wall form a fixing clamp, and the valve cover and the valve seat are connected with the fixing groove buckle through the fixing clamp.

The valve cover comprises a valve cover vent hole and a valve cover vent hole which is positioned on the top of the valve cover and around the upper positioning point.

The air guide plate is arranged on the bottom surface of the base and is uniformly distributed along the outer edge of the base. The supporting air guide sheet is sheet-shaped, and preferably a sheet with a groove in the middle. Vacuum compression bag is at the in-process of bleeding or exhausting, and the content can take place deformation, supports to lead the gas piece and props the content for form the cavity between content and the discharge valve, be favorable to gaseous smooth and easy discharge, if not be equipped with the recess, every two supports and lead and form inclosed ventiduct between gas piece and the content, and the inhomogeneous of content can cause the inhomogeneous of displacement, adds and establishes behind the recess, supports to lead that gas flow is smooth and easy between the gas piece, makes to bleed or exhaust more evenly.

The exhaust sealing cover is made of a silica gel material, when exhaust is performed, the vacuum compression bag is extruded, air between objects in the bag is extruded and flows out through the vent hole to impact the exhaust sealing cover, the soft cover body of the exhaust sealing cover is flushed by the air, so that the air is smoothly discharged, after the exhaust is completed, the external air pressure is greater than the air pressure in the bag due to the negative pressure in the bag, and the exhaust sealing cover is pressed on the valve seat to prevent the external air from entering the bag.

The beneficial effects of the utility model reside in that:

1. the utility model discloses simple structure adopts the sealed lid back-off of exhaust on the disk seat, covers the structure of air vent, and the sealed lid of exhaust is made for silica gel, and silica gel is soft elasticity relatively, warp easily under the effect of air current during the exhaust for it is smooth and easy to ventilate, and the sealed lid laminating of exhaust is on the disk seat because of inside and outside pressure differential's effect, and the leakproofness is good after the exhaust. The utility model discloses support the air guide piece further and played the effect of helping the exhaust for exhaust efficiency obtains good improvement and improvement.

2. The utility model discloses a disk seat with air guide post and air vent, exhaust structure is fixed and stable like this, can not take place deformation at the in-process of exhaust or sealed work, also can not cause the exhaust obstacle because of the jam of content, and exhaust effect is good exhaust efficiency is high.

3. The utility model discloses a setting element, the effect of parts such as valve gap that play locate function play good limiting displacement to the sealed lid of exhausting, are favorable to exhausting and sealed.

Drawings

Fig. 1 is an exploded view of embodiment 1 of the present invention;

fig. 2 is a schematic top view of a valve seat according to embodiment 1 of the present invention;

fig. 3 is a schematic view of the valve seat of embodiment 1 of the present invention in a bottom view;

FIG. 4 is a schematic view of the inner side structure of the exhaust sealing cover in embodiment 1 of the present invention;

FIG. 5 is a schematic view of the structure of the outside of the exhaust seal cover in embodiment 1 of the present invention;

FIG. 6 is a schematic view of the cross-sectional structure A-A of FIG. 4;

fig. 7 is a schematic top view structure of a valve cover according to embodiment 1 of the present invention;

fig. 8 is a schematic view of a bottom structure of a valve cover according to embodiment 1 of the present invention;

fig. 9 is a schematic top view of a valve cover according to embodiment 2 of the present invention;

fig. 10 is a schematic structural view of the supporting air guide plate in embodiment 3 of the present invention;

fig. 11 is a schematic bottom view of embodiment 3 of the present invention.

Detailed Description

Embodiments of the present invention are described in detail below with reference to the accompanying drawings.

Example 1:

referring to fig. 1-8, the structure of the multi-effect exhaust valve for vacuum compression bag of this embodiment is schematically illustrated:

a multi-effect exhaust valve for vacuum compression bag pumping is adhered to the wall of a vacuum compression bag, an adhesion hole is arranged on the wall of the vacuum compression bag, and the multi-effect exhaust valve for vacuum compression bag pumping is partially adhered to the inner wall of the vacuum compression bag and partially protrudes out of the wall of the vacuum compression bag; comprises a valve seat 1, an exhaust sealing cover 2 and a valve cover 3; the valve seat 1 comprises a base 11, a fixed seat 12 and a vent hole 13, wherein the fixed seat 12 is positioned on the base 11, and the vent hole 13 is positioned at the top 121 end of the fixed seat; the exhaust sealing cover 2 is positioned between the valve seat 1 and the valve cover 3 and covers the valve seat 1, and the valve seat 1 is connected with the valve cover 3 in a buckling mode.

Furthermore, the valve seat 1 further comprises an air guide column 14, the air guide column 14 penetrates through the fixing seat 12, the upper end of the air guide column 14 protrudes out of the upper end of the fixing seat 12, the lower end of the air guide column 14 protrudes out of the bottom end of the base 11, and a through hole is formed at the connecting part of the air guide column 14 and the fixing seat 12 and is an air vent 13.

The air guide column 14 further comprises column air guide plates 141, and more than one column air guide plate 141; in this embodiment, as a structure of 4 most preferable column air guide plates 141, an angle between each column air guide plate 141 and the adjacent column air guide plate 141 is 90 degrees. The column air guide plate 141 is L-shaped, semicircular, a shape formed by vertically stacking two arcs, a shape formed by combining a trapezoid, a right trapezoid and a rectangle, and the like, and the column air guide plate 141 is L-shaped formed by combining two rectangular sheets in this embodiment.

Furthermore, the valve seat 1 further comprises a positioning cap 143, the positioning cap 143 is located at the top end of the gas guiding column 14, the positioning cap 143 is in a circular shape, a valve seat positioning point 144 is arranged at the center of the circle of the top end of the positioning cap 143, and the valve seat positioning point 144 is in a concave circular arc shape.

The fixing base 12 includes a fixing base top 121 and a fixing base wall 122, the fixing base wall 122 is cylindrical, the fixing base top 121 is in a circular sheet shape, the diameter of the fixing base top 121 is larger than that of the fixing base wall 122, and a recessed fixing groove 123 is formed between the fixing base top 121, the fixing base wall 122 and the base 11.

The exhaust sealing cover 2 is arc-shaped, and the diameter of the outer edge of the arc is smaller than or equal to that of the fixed seat 12 and larger than that of the vent hole 13; the exhaust sealing cover 2 is reversely buckled on the valve seat 1 and covers the vent hole 13; referring to fig. 1, the exhaust sealing cover 2 covers the vent hole 13, or the exhaust sealing cover 2 is in a reversed bowl shape and comprises a bowl edge 21, a bowl wall 22 and a bowl bottom 23, wherein the diameter of the bowl edge 21 is smaller than or equal to that of the fixed seat 12 and is larger than that of the vent hole 13; the exhaust sealing cover 2 is buckled on the valve seat 1 and covers the vent hole 13. The vent holes can be multiple, the diameter of the vent sealing cover 2 is larger than the diameter of all the vent holes after combination, and all the vent holes are considered as the whole combined vent holes in the embodiment.

The exhaust sealing cover 2 further comprises an inner positioning point 24, and the inner positioning point 24 is located on the inner wall of the circle center of the top end of the exhaust sealing cover 2 and is in a convex arc shape; the outer wall is provided with a concave arc shape which is an outer positioning point 25, and the inner positioning point is opposite to the valve seat positioning point 144. In a static state, the inner positioning point is nested and connected with the valve seat positioning point 144, in an air exhaust or exhaust state, the exhaust sealing cover 2 is flushed by air flow, the outer positioning point is nested and connected with the upper positioning point 331 on the valve cover 3 under a certain condition, the positioning point is better ensured, incomplete sealing of the vent hole 13 caused by dislocation of the exhaust sealing cover 2 is avoided, and air leakage is avoided.

The valve cover 3 comprises a valve cover wall 32 and a valve cover top 33, the valve cover wall 32 is cylindrical, the valve cover top 33 is in a hollow arc shape, and the valve cover wall 32 is fixedly connected with the valve cover top 33. An upper positioning point 331 is arranged at the circle center position of the inner wall of the top 33 end of the valve cover, and the upper positioning point 331 is in a convex arc shape. The external positioning point 25 is opposite to the upper positioning point 331 on the bonnet 3,

the bottom end of the inner wall of the valve cover wall 32 is protruded, the protruded part and the valve cover wall 32 form a fixing clip 321, and the valve cover 3 and the valve seat 1 are connected with the fixing groove 123 in a buckling manner through the fixing clip 321. The exhaust sealing cover 2 further comprises a fixing protrusion 24, the fixing protrusion 24 is located on the inner wall of the exhaust sealing cover 2, the fixing protrusion 24 forms a convex ring along the inner wall of the exhaust sealing cover 2, and the diameter of the inner wall of the exhaust sealing cover 2 at the bottom of the convex ring is slightly larger than that of the positioning cap 143; the diameter of the convex ring is close to that of the positioning cap 143. The diameter of the convex ring is close to that of the positioning cap 143, that is, the diameter of the top end of the convex ring is slightly larger than, slightly smaller than or equal to that of the positioning cap 143; the exhaust sealing cover 2 is made of silica gel material, has certain elasticity, when the diameter of the exhaust sealing cover 2 is equal to or slightly smaller than that of the positioning cap 143, the positioning cap 143 can also be smoothly inserted into the groove formed by the fixing protrusion 24, the top end of the exhaust sealing cover 2 is fixed on the positioning cap 143, and under the action of airflow, the elastic exhaust sealing cover 2 can also deform to enable gas to be smoothly discharged; when the diameter of the convex ring is slightly larger than that of the positioning cap 143, the top end of the exhaust sealing cover 2 is nested outside the positioning cap 143 and cannot be separated from the positioning cap 143, and each part plays a role in exhausting, so that the exhaust sealing cover 2 is limited not to be blown and displaced by airflow, and the exhaust function can be well played. The utility model discloses a slightly be greater than or slightly be less than 2mm than finger difference in height or radius difference.

Example 2:

see fig. 9; the valve cover 3 further comprises a valve cover vent hole 35. the valve cover vent hole 35 is positioned on the valve cover top 33 and around the upper positioning point 331. The rest is the same as example 1.

Example 3:

see fig. 10-11; the air guide plate is characterized by further comprising supporting air guide plates 16, wherein the supporting air guide plates 16 are located on the bottom surface of the base 11 and are evenly distributed along the outer edge of the base 11. The supporting air guide sheet 16 is a sheet with a groove in the middle. Vacuum compression bag is at the in-process of bleeding or exhausting, and the content can take place deformation, supports air guide sheet 16 and props the content for form the cavity between content and the discharge valve, be favorable to gaseous smooth and easy discharge, if not be equipped with the recess, every two support and form inclosed ventiduct between air guide sheet 16 and the content, the inhomogeneous of content can cause the inhomogeneous of displacement, add after establishing the recess, support that air flow is smooth and easy between the air guide sheet 16, make bleed or exhaust more even. The rest is the same as example 1.

Example 4

See fig. 6; the exhaust sealing cover also comprises a fixing protrusion 26, the fixing protrusion is positioned on the inner wall of the exhaust sealing cover, the fixing protrusion forms a convex ring along the inner wall of the exhaust sealing cover, and the diameter of the inner wall of the exhaust sealing cover at the bottom of the convex ring is slightly larger than that of the positioning cap; the diameter of the convex ring is close to that of the positioning cap. The diameter of the convex ring is close to that of the positioning cap, namely the diameter of the top end of the convex ring is slightly larger than, slightly smaller than or equal to that of the positioning cap; the exhaust sealing cover is made of a silica gel material, has certain elasticity, and can be smoothly inserted into the groove formed by the fixing protrusion when the diameter of the exhaust sealing cover is equal to or slightly smaller than the diameter of the positioning cap; when the diameter of the convex ring is slightly larger than that of the positioning cap, the top end of the exhaust sealing cover is nested outside the positioning cap and cannot be separated from the positioning cap, all parts are used during exhaust, the exhaust sealing cover is limited not to be blown and displaced by airflow, and the exhaust effect can be well played. The utility model discloses a slightly be greater than or slightly be less than 2mm than finger difference in height or radius difference. The rest is the same as example 1.

Of course, the foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations are also considered to be the protection scope of the present invention.

Claims

1. The utility model provides a vacuum compression bag pump drainage multiple-effect discharge valve which characterized in that: comprises a valve seat, an exhaust sealing cover and a valve cover; the valve seat comprises a base, a fixed seat and a vent hole, wherein the fixed seat is positioned on the base, and the vent hole is positioned at the top end of the fixed seat; the exhaust sealing cover is positioned between the valve seat and the valve cover and covers the valve seat, and the valve seat is connected with the valve cover in a buckling manner; the valve seat further comprises an air guide column, the air guide column penetrates through the fixing seat, the upper end of the air guide column protrudes out of the upper end of the fixing seat, the lower end of the air guide column protrudes out of the bottom end of the base, and a through hole is formed in the connecting part of the air guide column and the fixing seat and is an air vent.

2. The multi-effect exhaust valve for vacuum compression bags according to claim 1, wherein: the fixing seat comprises a fixing seat top and a fixing seat wall, the fixing seat wall is cylindrical, the fixing seat top is in a disc shape, the diameter of the fixing seat top is larger than that of the fixing seat wall, and a concave fixing groove is formed among the fixing seat top, the fixing seat wall and the base; the exhaust sealing cover is arc-shaped, and the diameter of the arc-shaped outer edge is smaller than or equal to that of the fixed seat and larger than that of the vent hole; the exhaust sealing cover is reversely buckled on the valve seat and covers the vent hole; or the exhaust sealing cover is in a reversed bowl shape and comprises a bowl edge, a bowl wall and a bowl bottom, and the diameter of the bowl edge is smaller than or equal to that of the fixed seat and larger than that of the vent hole; the valve cover comprises a valve cover wall and a valve cover top, the valve cover wall is cylindrical, the valve cover top is in a hollow arc shape, and the valve cover wall is fixedly connected with the valve cover top.

3. The multi-effect exhaust valve for vacuum compression bags according to claim 2, wherein: the air guide column also comprises more than one column air guide sheet; the valve seat further comprises a positioning cap, the positioning cap is located at the top end of the air guide column, and the positioning cap is in a circular sheet shape.

4. The multi-effect exhaust valve for vacuum compression bags according to claim 3, wherein: the column air guide sheets are more than two, the air guide column further comprises a column core, and the column air guide sheets are uniformly distributed along the column core; a valve seat positioning point is arranged at the circle center position of the top end of the positioning cap, and the valve seat positioning point is in a concave arc shape; the exhaust sealing cover also comprises an inner positioning point and an outer positioning point, wherein the inner positioning point is positioned on the inner wall of the circle center of the top end of the exhaust sealing cover and is in a convex arc shape; the outer wall of the circle center of the top end of the exhaust sealing cover is provided with a sunken circular arc which is an outer positioning point; an upper positioning point is arranged at the circle center of the inner wall of the top end of the valve cover and is in a convex arc shape; the outer positioning point is opposite to the upper positioning point on the valve cover, and the inner positioning point is opposite to the valve seat positioning point.

5. The multi-effect exhaust valve for vacuum compression bags according to claim 4, wherein: the number of the column air guide sheets is 4; one side of the column air guide sheet is fixed on the column core and is uniformly distributed along the same circle; the column air guide sheet is L-shaped, semicircular, a shape formed by vertically overlapping two arcs, and a shape formed by combining a trapezoid, a right trapezoid and a rectangle; the exhaust sealing cover also comprises a fixing protrusion, the fixing protrusion is positioned on the inner wall of the exhaust sealing cover, the fixing protrusion forms a convex ring along the inner wall of the exhaust sealing cover, and the diameter of the inner wall of the exhaust sealing cover at the bottom of the convex ring is slightly larger than that of the positioning cap; the diameter of the convex ring is close to that of the positioning cap.

6. The multi-effect exhaust valve for vacuum compression bags according to claim 2, wherein: the valve cover and the valve seat are connected with the fixing groove in a buckling mode through the fixing clip; the valve cover vent hole is positioned on the top of the valve cover and around the upper positioning point.

7. The multi-effect exhaust valve for vacuum compression bags according to claim 1, wherein: the support air guide sheet is a sheet with a groove in the middle, and is located on the bottom surface of the base and evenly distributed along the outer edge of the base.