CN217815172U

CN217815172U - Air return valve and air return container

Info

Publication number: CN217815172U
Application number: CN202221875116.6U
Authority: CN
Inventors: 曾宪兵
Original assignee: Beijing Shenchuang Century Information Technology Co Ltd
Current assignee: Beijing Shenchuang Century Information Technology Co Ltd
Priority date: 2022-07-12
Filing date: 2022-07-12
Publication date: 2022-11-15
Anticipated expiration: 2032-07-12

Abstract

The utility model belongs to the technical field of articles for daily use, concretely relates to return-air valve and return-air container. The air return valve comprises a valve body and an air path formed along the axis of the valve body; the valve body comprises a valve lip part and a valve body part; the valve lip is positioned above the valve body part, the valve lip is a boss formed by enclosing a membrane, and the wall thickness of the boss is smaller than that of the valve lip; the air passage is communicated with the valve body part, the valve lip part is provided with an air seam connected with the air passage, the air seam is closed when the container is under non-negative pressure, and is opened when the container is under negative pressure. The air return container comprises a container body and the air return valve; the container body is provided with a mounting hole, and the air return valve is in interference fit with the mounting hole. The utility model discloses an air return valve can play the one-way effect of switching on, reduces the possibility of gas gap department liquid seepage. The air return valve can return air into the air return container to compensate the negative pressure in the air return container, so that a user can conveniently take in liquid in the air return container.

Description

Air return valve and air return container

Technical Field

The utility model belongs to the technical field of articles for daily use, particularly, the utility model relates to an air return valve and air return container.

Background

Containers for holding liquids, whether at home or outdoors, are often found in people's daily lives, such as cups. In uncovered drinking cup, the bottle has good leakproofness, can prevent that liquid accident from spilling hourglass, more loved by people. However, the bottles may also be unsatisfactory for use. Firstly, negative pressure in the bottle can be caused by expansion with heat and contraction with cold, and the bottle is not opened well when being opened; secondly, when the bottle is used in combination with a straw, a nipple and the like, negative pressure can also occur in the bottle along with the reduction of liquid in the bottle, so that the bottle is inconvenient to drink. In particular, in the second case, the tamper-evident end is more evident when the bottle is used with a teat (as a feeding bottle).

When the nursing bottle is used as a nursing bottle, in order to balance negative pressure, an air return valve is often arranged at the nipple, air is fed into the nursing bottle during negative pressure, although the problem of negative pressure can be solved, a new problem is introduced, air bubbles are easy to suck and expand during the use of an infant, and the milk is oxidized when the air bubbles pass through the milk, so that nutrition loss is caused.

In the prior art, some technical schemes exist, and the problems of negative pressure, flatulence and milk oxidation can be solved. For example, in patent application No. 201420577388.7, application date 2014 9, 30 and the invention creation name of a novel anti-flatulence feeding bottle, an anti-flatulence feeding bottle is disclosed. Which comprises a bottle body, a silica gel air return bottom plug, a handle, a nipple sleeve, a nipple and a nipple cover. The bottle upper end is for being equipped with the bottleneck of external screw thread, bottom of the bottle portion be equipped with the external communicating end stopper mouth of bottle, silica gel return-air end stopper is located in bottom of the bottle portion's the end stopper mouth and the chucking is sealed the central authorities department of silica gel return-air end stopper prolongs the longitudinal direction and offers a return-air seam of lining up silica gel return-air end stopper head portion, the handle is located soon through the handle lantern ring in the middle of it bottle bottleneck department, the nipple cover is located on the handle lantern ring of handle, the nipple is located the nipple is sheathe in, the nipple cover in the nipple upper end.

In the technical scheme, the silica gel air return bottom plug is arranged on the bottle body, so that negative pressure can be balanced, the problems of air expansion and milk liquid oxidation are solved, a new problem is introduced, liquid in the bottle body is easy to leak at the silica gel air return bottom plug, and the sealing performance of the bottle body at the silica gel air return bottom plug is poor. Meanwhile, the silica gel air return bottom plug has the problem of poor plugging when being plugged, and is not easy to install in place during installation.

SUMMERY OF THE UTILITY MODEL

In order to solve the above-mentioned problem at least partially, the utility model provides an air return valve and return-air container, its technical scheme as follows:

an air return valve is used for being installed on a container and comprises a valve body and an air path formed along the axial direction of the valve body; the valve body comprises a valve lip part and a valve body part; the valve lip part is positioned above the valve body part, the valve lip part is a boss formed by enclosing a membrane, and the wall thickness of the boss is smaller than that of the valve body part; the air passage is communicated with the valve body part, the valve lip part is provided with an air seam connected with the air passage, the air seam is closed when the container is under non-negative pressure, and is opened when the container is under negative pressure.

The air return valve as described above is further preferably: the valve body portion top surface is equipped with down the concave surface, the valve lip is located down on the concave surface.

The air return valve as described above is further preferably: the lower concave surface smoothly rises at the periphery until the lower concave surface is connected with the top surface of the valve body part.

The air return valve as described above is further preferably: the air gap is linear and is arranged at the top of the valve lip part and is positioned on the symmetrical surface of the valve lip part.

The air return valve as described above is further preferably: the wall thickness of the top surface of the body portion decreases at the lower concave surface.

The air return valve as described above is further preferably: the junction of the valve lip and the lower concave surface is a first ridge, and the first ridge is in a closed ring shape.

The air return valve as described above is further preferably: the valve body part comprises a valve head part and a valve neck part, and the valve neck part is positioned below the valve head part; the valve head is used for bearing the valve lip, and the valve neck is used for fitting a mounting hole in a container wall; and the outer contour area of the valve head part is larger than that of the valve neck part in projection along the axial direction of the valve body.

The air return valve as described above is further preferably: a first fillet is arranged at the outer periphery of the top of the valve head.

The air return valve as described above is further preferably: the device also comprises a support body; the support body is cylindrical and is used for supporting the valve neck, and the axis of the support body coincides with the axis of the valve neck.

The air return valve as described above is further preferably: the supporting body and the valve body are integrally formed; the support body is made of plastic or rubber, and the valve body is made of rubber.

The air return valve as described above is further preferably: the support body is wrapped in the valve neck, the outer diameter of the support body is smaller than that of the valve neck, and the inner diameter of the support body is larger than that of the gas circuit.

The air return valve as described above is further preferably: the support body is located in the gas circuit, and in the peripheral face with the laminating of valve neck portion, the external diameter of support body is greater than the air inlet diameter of gas circuit, the internal diameter of support body is not more than the air inlet diameter of gas circuit.

The air return valve as described above is further preferably: the supporter is located in the gas circuit, the supporter is thickening ring for increasing the wall thickness of valve neck, the internal diameter of supporter is not more than the air inlet diameter of gas circuit.

The air return valve as described above is further preferably: the valve body further comprises a valve disc portion located below the valve neck portion; and the outer contour area of the valve disc part is larger than that of the valve neck part along the axial projection of the valve body.

The air return valve as described above is further preferably: the bottom surface of the valve disk part is an arc-shaped surface, and the edge height is higher than the center height.

The air return valve as described above is further preferably: the top surface of the valve disk part is an arc-shaped surface, and the edge height is higher than the center height.

The air return valve as described above is further preferably: and a second fillet is arranged on the valve neck at the junction of the valve neck and the valve head and is used for being matched with the inner edge of the mounting hole on the wall of the container.

The air return valve as described above is further preferably: and a third fillet is arranged on the valve neck part at the junction of the valve neck part and the valve disc part, and the third fillet is used for being matched with the outer edge of the mounting hole on the wall of the container.

The air return valve as described above is further preferably: and a fourth fillet is arranged on the periphery of the bottom surface of the valve disc part.

The air return valve as described above is further preferably: and a second ridge is arranged on the periphery of the top surface of the valve disc part.

The air return valve as described above is further preferably: the valve body part and the valve lip part are both cylinders; along the axial direction projection of the valve body, the outer contour of the valve body part is circular, and the outer contour of the valve lip part is oval.

The air return valve as described above is further preferably: the valve lip portion is located at a symmetry plane of the valve body portion; the air slit is located on a symmetrical plane of the valve lip portion along the length direction.

The air return valve as described above is further preferably: the outer contour of the valve lip portion is gradually reduced along the direction from the valve body portion to the valve lip portion.

The air return valve as described above is further preferably: the wall thickness of the valve lip portion is gradually reduced in a direction from the valve body portion to the valve lip portion.

The air return container comprises a container body and the air return valve; the container body is provided with a mounting hole, and the air return valve is in interference fit with the mounting hole.

The air return container as described above is more preferably: the mounting hole is positioned at the bottom of the container body, and the bottom of the container body is provided with an inwards concave curved surface; the area of the outer contour of the valve disc part of the air return valve is smaller than the area of the inwards concave curved surface of the container body.

The analysis can know, compare with prior art, the utility model discloses an advantage and beneficial effect lie in:

the utility model discloses an among the return air valve, during the return air, in the external gas entered into the container behind the gas circuit back-open gas seam, when not returning air, the gas seam was in the closure state, played the one-way effect of switching on. The valve lip is a boss formed by enclosing the membrane, the boss protrudes above the valve body part, the borne pressure is concentrated, the sealing reliability can be ensured, and liquid is prevented from flowing out from the air gap. The wall thickness of the valve lip is smaller than that of the valve body, and the valve is sensitive and reliable in air return and sealing.

The utility model discloses an among the return-air container, return-air valve and mounting hole interference fit can be to return-air in the return-air container, compensate the negative pressure in the return-air container, and convenient to use person intakes the liquid in the return-air container. The air return valve is arranged at the mounting hole, can play a role in one-way conduction, can compensate negative pressure in the air return container, and can prevent liquid in the air return container from leaking outside.

Drawings

FIG. 1 is a schematic structural view of an air return valve;

FIG. 2 is a cross-sectional view of the air return valve along the length of the valve lip;

FIG. 3 is a cross-sectional view of the air return valve taken perpendicular to the length of the valve lip;

fig. 4 is a schematic connection diagram of the return air container.

In the figure: 1-air return valve; 2-air gap; 3-a valve lip; 4-third rounded corner; 5-a valve neck; 6-first rounded corner; 7-a valve disc portion; 8-a lower concave surface; 9-a second rounded corner; 10-a support; 11-an air inlet; 12-fourth fillet; 13-a gas return container; 14-mounting holes; 15-a first edge; 16-second edge.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. 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, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", 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 of the present invention and do not require that the present invention must be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense, and may be, for example, either fixed or detachable; they may be directly connected or indirectly connected through intermediate members, and specific meanings of the above terms will be understood by those skilled in the art as appropriate.

Referring to fig. 1 to 4, fig. 1 is a schematic structural view of an air return valve; FIG. 2 is a cross-sectional view of the air return valve along the length of the valve lip; FIG. 3 is a cross-sectional view of the air return valve taken perpendicular to the length of the valve lip; fig. 4 is a schematic connection diagram of the return air container. In fig. 2, a schematic diagram in design shows a part of interference, and in actual use, the air return valve can be elastically deformed and deformed at the interference, so that the interference does not exist in actual use.

As shown in fig. 1, in one embodiment of the present invention, an air return valve 1 is provided for mounting on a container for returning air to compensate for a negative pressure in the container. Specifically, the air return valve 1 includes a valve body and an air passage formed in an axial direction of the valve body (a direction in which an axis of the valve body is located). The valve body comprises a valve lip portion 3 and a valve body portion, the valve lip portion 3 is located above the valve body portion, the air path penetrates through the valve body portion, an air gap 2 connected with the air path is arranged on the valve lip portion 3, the air gap 2 is closed when the pressure in the container is non-negative pressure, when a user causes negative pressure in the container through sucking and the like, the air gap is opened, and the air path is communicated to admit air into the container. Wherein, the valve lip 3 is a boss enclosed by the membrane, and the wall thickness of the valve lip 3 is smaller than that of the valve body. "non-negative pressure" means that the pressure in the container is not less than atmospheric pressure, and may be that the pressure at gas return valve 1 is greater than atmospheric pressure, for example, gas return valve 1 is submerged by the liquid in the container and the total pressure of the liquid and gas in the container at gas return valve 1 is greater than atmospheric pressure; it may be that the pressure at gas return valve 1 is equal to atmospheric pressure, for example scenario one, gas return valve 1 is submerged by the liquid in the container and the total pressure of the liquid and the gas in the container at gas return valve 1 is equal to atmospheric pressure (when the pressure of the gas in the container is less than atmospheric pressure, but the part smaller than atmospheric pressure is exactly compensated by the pressure of the liquid), scenario two, gas return valve 1 does not contact the liquid in the container and the pressure of the gas in the container is equal to atmospheric pressure.

In this embodiment, when the air return valve 1 is mounted on a container, the body portion of the valve fits into the wall of the container and the valve lip 3 is located within the container. When air returns, external air enters the container after the air gap 2 is opened by the air path, and when the air returns, the air gap 2 is in a natural state (a closed state) to play a role of one-way conduction. The valve lip is a boss formed by enclosing the membrane, the boss is protruded above the valve body part, the borne pressure is concentrated, the sealing reliability can be ensured, and the liquid is prevented from flowing out from the air gap 2. The wall thickness of the valve lip 3 is smaller than that of the valve body, and the valve lip is sensitive and reliable in air return and sealing.

As shown in fig. 1, in an embodiment of the present invention, the outer contour area of the valve lip portion 3 is smaller than the outer contour area of the valve body portion, so as to effectively reduce the volume ratio of the valve lip portion 3 to the valve body portion, and further reduce the possibility of liquid leakage at the air gap 2.

Further, in the present embodiment, the outer contour area of the valve lip portion 3 is fifteen to one fifth, most preferably one tenth, of the outer contour area of the valve body portion, projected in the axial direction of the valve body, so that the valve lip portion 3 can be operated conveniently without liquid leakage.

As shown in fig. 1 and 2, in one embodiment of the present invention, the valve body top surface is provided with a lower concave surface 8, and the valve lip 3 is located on the lower concave surface 8. Wherein, the lower concave surface 8 smoothly rises at the periphery until being connected with the top surface of the valve body part. When the valve lip 3 is immersed by liquid, the lower concave surface 8 is stressed and tends to gather downwards from the periphery to the center, acting force can be applied to the valve lip 3, and then the air gap 2 on the valve lip 3 is closed more tightly, so that liquid leakage at the air gap 2 is avoided.

Further, in the present embodiment, the wall thickness of the top surface of the valve body portion is reduced at the lower concave surface 8. When the lower concave surface 8 is subjected to liquid pressure, the lower concave surface tends to sink, so that a force which is gathered towards the center can be applied to the valve lip 3, and the reliability of closing the air gap 2 is ensured.

Furthermore, in the present embodiment, the first rib 15 is disposed at the boundary between the valve lip portion 3 and the lower concave surface 8, and the first rib 15 is in a closed ring shape, so that the valve body portion can transmit the acting force to the valve lip portion 3. It should be noted that, in the present embodiment, the first rib 15 may also be rounded for facilitating the product manufacturing, and the radius of the rounded corner is very small, for example, 0.1mm, 0.2mm, etc., without departing from the solution of the present embodiment.

As shown in fig. 3, in an embodiment of the present invention, the air gap 2 is a linear type, which is convenient for closing and opening. The air gap 2 is arranged at the top of the valve lip part 3 and is positioned on the symmetrical plane of the valve lip part 3, so that the two sides of the air gap 2 are stressed evenly.

As shown in fig. 2, in one embodiment of the present invention, the valve body portion includes a valve head portion and a valve neck portion 5, and the valve neck portion 5 is located below the valve head portion. In use, the valve head is intended to carry the valve lip 3 and the valve neck 5 is intended to fit into the mounting hole 14 in the container wall. The outer contour area of the valve head part is larger than that of the valve neck part 5 along the axial direction projection of the valve body, so that the valve neck part 5 can be extruded in the mounting hole 14, the valve head part can cover the mounting hole 14, and outward leakage of the mounting hole 14 is avoided.

Furthermore, in the present embodiment, a first fillet 6 is disposed at the top outer periphery of the valve head, so that the air return valve 1 can be conveniently plugged into the mounting hole 14, which is convenient for operation.

As shown in fig. 2 and fig. 3, in an embodiment of the present invention, the present invention further includes a supporting body 10, where the supporting body 10 is cylindrical and is used for supporting the valve neck 5, so as to both support and not obstruct the air flow of the air passage. The axis of the support body 10 coincides with the axis of the valve neck portion 5, and can provide a uniform supporting force to the valve neck portion 5 in the circumferential direction. The support body 10 may be made of a plastic material, such as PPSU (Polyphenylene sulfone resin, abbreviated as PPSU), and may have a supporting function on an inner wall of the valve body, and the support body 10 may also be made of a rubber material, which is the same as the valve body. The valve body can be selected to be rubber material, for example silica gel material, easily takes place elastic deformation, when installing in mounting hole 14 department, can be extrudeed between supporter 10 and mounting hole 14, avoids the weeping. The supporting body 10 and the valve body are integrally formed, and structurally, the supporting body is a component which cannot be disassembled, so that the number of parts can be reduced, and the supporting body is convenient to carry and store.

When the air return valve is used, the air return valve 1 can be connected with the mounting hole 14 in a clamping mode, in a threaded mode and the like, can be detached from a container, and is convenient to clean and assemble. When the air return valve 1 is installed on the installation hole 14, the support body 10 can play a role in supporting, so that the deformation resistance of the valve body is improved, and the air return valve 1 can be conveniently installed on the installation hole 14; when the air return valve 1 is installed on the installation hole 14, the support body 10 can extrude the valve body between the support body 10 and the installation hole 14, so that the reliability of the air return valve 1 on the installation hole 14 is ensured, and liquid leakage and accidental falling of the air return valve 1 are avoided.

As an implementation of this embodiment, the supporting body 10 is wrapped in the valve neck 5, the outer diameter of the supporting body 10 is smaller than the outer diameter of the valve neck 5, and the inner diameter of the supporting body 10 is larger than the diameter of the air passage. In this embodiment, the support body 10 acts as a support inside the valve neck 5 to support the valve neck 5 in an encapsulated design.

As another possible implementation of this embodiment, the supporting body 10 is located in the air path, and the supporting body 10 is attached to the valve neck portion 5 at the outer peripheral surface, the outer diameter of the supporting body 10 is larger than the diameter of the air inlet 11 of the air path, the attachment area of the supporting body 10 and the valve body is increased, and the supporting body 10 is limited by the valve body at both ends in the axial direction, so that axial displacement cannot occur. The support body 10 does not come off the valve body during the process of inserting the air return valve 1 into the mounting hole 14 or extracting the air return valve from the mounting hole 14. The inner diameter of the support body 10 is not larger than the diameter of the air inlet 11 of the air path, can be smaller than the diameter of the air inlet 11 of the air path, and can also be equal to the diameter of the air inlet 11 of the air path, so that the cleaning is convenient.

As a further possible implementation of this embodiment, the supporting body 10 is located in the air channel, the supporting body 10 is a thickened ring, and the inner diameter of the supporting body 10 is not greater than the diameter of the air inlet of the air channel. The support body 10 is made of the same material as the valve body, is structurally a component with the valve body, is used as a part for thickening the valve body, and can improve the radial deformation resistance of the valve body. As a variant, the support body 10 may be made of the same material as the valve body and may be structurally separated from the valve body into two parts.

As shown in fig. 1 and 3, in an embodiment of the present invention, the valve body further includes a valve disc portion 7, and the valve disc portion 7 is located below the valve neck portion 5. Wherein, the outer contour area of the valve disc part 7 is larger than that of the valve neck part 5 along the axial projection of the valve body. When in use, the valve disc part 7 can be clamped at the bottom of the mounting hole 14, liquid leakage is prevented, and the air return valve 1 is prevented from falling into a container from the mounting hole 14.

Further, in this embodiment, the top surface of valve disk portion 7 is the arcwall face, and the edge height is higher than the central height, and as an implementable scheme, valve disk portion 7 upwarps to the edge by the center gradually, can the actuation when using on the outer wall of container. The bottom surface of valve disk portion 7 is the arcwall face, and the edge height is higher than central height, but as an implementation scheme, valve disk portion 7 is upwarped by the center to the edge gradually, can avoid valve disk portion 7 actuation on the plane that the container was put to, and, when 7 top surfaces actuation of valve disk portion closed in the outer wall of container (outer wall shape is close to the plane), the synchronous deformation of 7 bottom surfaces of valve disk portion, and is close to the plane, and the container is difficult for toppling when placing.

Furthermore, in this embodiment, the periphery of the top surface of the valve disc portion 7 is provided with the second rib 16, and the periphery of the bottom surface of the valve disc portion 7 is provided with the fourth round corner 12, so that when the container is taken up, the valve disc portion 7 can be attracted to the wall of the container, thereby ensuring that the air return valve 1 does not fall off.

As shown in fig. 2, in an embodiment of the present invention, at the junction between the valve neck portion 5 and the valve head portion, the second fillet 9 is disposed on the valve neck portion 5, and during use, the second fillet 9 can be matched with the inner edge of the mounting hole 14 on the wall of the container, and pressed on the inner edge of the mounting hole 14, so as to ensure the reliability of sealing. And a third fillet 4 is arranged on the valve neck part 5 at the junction of the valve neck part 5 and the valve disc part 7, and when the valve is used, the third fillet 4 can be matched with the outer edge of the mounting hole 14 on the wall of the container and pressed on the outer edge of the mounting hole 14, so that the sealing reliability is further ensured.

As shown in fig. 1 and 3, in an embodiment of the present invention, the valve body portion and the valve lip portion 3 are both cylinders. The projection along the axial direction of the valve body, the outer contour of the valve body part is circular, and the cost can be reduced. The outer contour of the valve lip 3 is oval (the oval is a figure formed by replacing two semicircular wide sides of a rectangle), the air gap 2 can be better attached, and the air return and closing actions of the air gap 2 are more accurate.

Further, in the present embodiment, the outer profile of the valve lip 3 is gradually reduced in the direction from the valve body portion to the valve lip 3. When the valve lip 3 is positioned below the liquid level in use, the valve lip 3 is subjected to downward oblique pressure on the periphery, so that the air gap 2 can be pressed to be closed, and liquid leakage at the air gap 2 is avoided. Along valve body portion to 3 directions of valve lip, the wall thickness of valve lip 3 reduces gradually, reaches the minimum at gas seam 2 department, and the gas seam 2 of being convenient for is opened and is closed, and the action is more sensitive.

Furthermore, in the embodiment, the valve lip 3 is located on the symmetric plane of the valve body, and the air gap 2 is located on the symmetric plane of the valve lip 3 along the length direction, so that the valve is stressed uniformly in use, the action is accurate, and the production cost can be reduced.

As shown in fig. 2 and fig. 4, based on the air return valve 1, the present invention further provides an air return container 13. In one embodiment of the present invention, the air return container 13 includes a container body and an air return valve 1. Wherein, be equipped with mounting hole 14 on the container body, return-air valve 1 and mounting hole 14 interference fit, in the use of return-air container 13, can return-air to return-air container 13 in, compensate the negative pressure in the return-air container 13, the person of facilitating the use intakes the liquid in the return-air container 13. In this embodiment, the mounting hole 14 may be located on a side wall of the container body, may also be located at a top of the container body, and may also be located at a bottom of the container body, and the air return valve 1 is installed at the mounting hole 14, and may play a role of one-way conduction, so as to compensate for a negative pressure in the air return container 13, and prevent liquid in the air return container 13 from leaking outward.

As shown in fig. 4, in an embodiment of the present invention, the mounting hole 14 is located at the bottom of the container body, the bottom of the container body is provided with an inwardly concave curved surface, and the air return valve can effectively return air when the bottom of the container body is upward or the bottom of the container body is inclined upward, for example, when the air return valve is applied to a feeding bottle, milk cannot be oxidized, and an infant cannot take air bubbles. The area of the outer contour of the valve disc part 7 of the air return valve 1 is smaller than the area of the inward concave curved surface of the container body, and the stability of the container body when the container body is placed cannot be influenced.

As shown in fig. 1 to fig. 4, the working process of the present invention will be described in detail by taking the application to a feeding bottle as an example:

when the feeding bottle is used as a feeding bottle, the container body is a bottle body, a nipple is arranged on the bottle body, a dustproof cover is arranged on the nipple, a mounting hole 14 is formed in the bottom of the bottle body, and an air return valve 1 is arranged on the mounting hole 14.

When the feeding bottle is placed on a plane, the supporting body 10 is supported in the valve body; the valve head portion is covered above the mounting hole 14; the valve neck 5 is in interference fit with the mounting hole 14, and the reliability of sealing can be ensured. Valve neck 5 is equipped with second fillet 9 and third fillet 4, additionally sets up twice on interference fit's basis and prevents the line, can further guarantee that the leakproofness satisfies the operation requirement. The valve lip 3 and the valve head of the air return valve 1 are located below the liquid level and are submerged by the liquid. The liquid gives the downward pressure to the top surface of the valve head, the bottom surface of the valve head has the downward trend, and can give the acting force of the valve lip 3 gathered towards the center, thereby ensuring that the air gap 2 is closed and no liquid leakage occurs. At the same time, the liquid also gives the valve lip 3 a force that is inclined downward on the periphery, which can further ensure the reliability of the closure of the air gap 2.

When the feeding bottle is used for feeding milk, the bottle bottom is upward or inclined upward, the air return valve 1 is separated from milk, and air can be returned in time when the air pressure in the bottle body is reduced, so that the feeding milk is ensured to be smooth.

It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes within the scope of the invention or within the scope equivalent to the invention are all embraced by the invention.

Claims

1. An air return valve for mounting on a container, comprising:

the valve comprises a valve body and an air passage formed along the axial direction of the valve body;

the valve body comprises a valve lip part and a valve body part;

the valve lip part is positioned above the valve body part, the valve lip part is a boss formed by enclosing a membrane, and the wall thickness of the boss is smaller than that of the valve body part;

the air passage is communicated with the valve body part, the valve lip part is provided with an air seam connected with the air passage, the air seam is closed when the container is under non-negative pressure, and is opened when the container is under negative pressure.

2. An air return valve as claimed in claim 1, characterized in that:

the valve body part top surface is equipped with down the concave surface, the valve lip is located on the concave surface down.

3. An air return valve as claimed in claim 2, characterized in that:

the lower concave surface smoothly rises at the periphery until the lower concave surface is connected with the top surface of the valve body part.

4. An air return valve as claimed in claim 2, characterized in that:

the air gap is linear and is arranged at the top of the valve lip and is positioned on the symmetrical surface of the valve lip.

5. An air return valve as claimed in claim 1, characterized in that:

the valve body part comprises a valve head part and a valve neck part, and the valve neck part is positioned below the valve head part;

the valve head is used for bearing the valve lip, and the valve neck is used for fitting a mounting hole in a container wall;

the outer contour area of the valve head part is larger than that of the valve neck part in projection along the axial direction of the valve body;

a first fillet is arranged at the outer periphery of the top of the valve head.

6. An air return valve as claimed in claim 1, wherein:

the device also comprises a support body;

the support body is cylindrical and is used for supporting the valve neck, and the axis of the support body coincides with the axis of the valve neck.

7. An air return valve as claimed in claim 6, characterized in that:

the supporting body and the valve body are integrally formed;

the supporting body is wrapped in the valve neck, the outer diameter of the supporting body is smaller than that of the valve neck, and the inner diameter of the supporting body is larger than that of the gas path; or

The support body is located in the gas circuit, and is attached to the valve neck portion on the outer peripheral surface, the outer diameter of the support body is larger than the diameter of the gas inlet of the gas circuit, and the inner diameter of the support body is not larger than the diameter of the gas inlet of the gas circuit.

8. An air return valve as claimed in claim 6, characterized in that:

the supporter is located in the gas circuit, the supporter is thickening ring for increasing the wall thickness of valve neck, the internal diameter of supporter is not more than the air inlet diameter of gas circuit.

9. An air return valve as claimed in claim 5, characterized in that:

the valve body further comprises a valve disc portion located below the valve neck portion;

and the outer contour area of the valve disc part is larger than that of the valve neck part along the axial projection of the valve body.

10. An air return valve as claimed in claim 9, wherein:

the bottom surface of the valve disk part is an arc-shaped surface, and the edge height is higher than the center height;

the top surface of the valve disk part is an arc-shaped surface, and the edge height is higher than the center height.

11. An air return valve as claimed in claim 9, wherein:

a second fillet is arranged on the valve neck at the junction of the valve neck and the valve head, and the second fillet is used for being matched with the inner edge of the mounting hole on the wall of the container;

a third fillet is arranged on the valve neck part at the junction of the valve neck part and the valve disc part, and the third fillet is used for being matched with the outer edge of the mounting hole on the wall of the container;

a fourth fillet is arranged on the periphery of the bottom surface of the valve disc part;

and a second edge is arranged on the periphery of the top surface of the valve disc part.

12. An air return valve as claimed in claim 5, wherein:

the valve body part and the valve lip part are both cylinders;

the outer contour of the valve body part is circular, and the outer contour of the valve lip part is oblong;

the valve lip is located at a plane of symmetry of the valve body portion;

the air gap is positioned on the symmetrical plane of the valve lip along the length direction.

13. An air return valve as claimed in claim 5, characterized in that:

the outer contour of the valve lip part is gradually reduced along the direction from the valve body part to the valve lip part;

the wall thickness of the valve lip portion is gradually reduced in a direction from the valve body portion to the valve lip portion.

14. A gas return vessel, comprising:

a container body and the air return valve of any one of claims 1 to 13;

the container body is provided with a mounting hole, and the air return valve is in interference fit with the mounting hole.

15. The air return vessel of claim 14, wherein:

the mounting hole is positioned at the bottom of the container body, and the bottom of the container body is provided with an inwards concave curved surface;

the area of the outer contour of the valve disc part of the air return valve is smaller than the area of the inwards-concave curved surface of the container body.