Air return valve

Abstract

The utility model discloses an air return valve, which relates to the technical field of articles for daily use and comprises a valve body matched with a container for use and a valve nozzle arranged on the valve body, the valve body is arranged at the bottom of the container, the valve body is provided with an air channel which penetrates through the valve body and is communicated with the inside of the container, and the valve nozzle is provided with an air gap communicated with the air channel. The air gap is closed when the non-negative pressure exists in the container and is opened when the negative pressure exists in the container, and the number of the valve nozzles is not less than 2. When one valve nozzle in the air return valve is blocked, other valve nozzles can still be used, and use of the container is not affected.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of daily necessities, especially to a back gas valve. BACKGROUND

[0002] Whether at home or out, the container for holding liquid often appears in people's daily life, such as a cup. For an open cup, the bottle has good sealing performance, can prevent liquid from accidentally spilling, and is more popular. However, the bottle also has some unsatisfactory aspects when in use. First, thermal expansion and contraction can cause negative pressure in the bottle, which is not easy to open when the cover is opened; second, when used with a straw, a nipple, etc., as the liquid in the bottle decreases, negative pressure will also appear in the bottle, making it inconvenient to drink. Especially in the second case, when the bottle is used with a nipple (as a feeding bottle), the drawbacks are more obvious.

[0003] When used as a feeding bottle, in order to balance the negative pressure, a back gas valve is often provided at the nipple to allow air to enter the bottle when there is negative pressure. Although this can solve the problem of negative pressure, it also introduces a new problem. When air enters the bottle through the nipple, gas bubbles will form after entering the bottle, and the interval between sucking the milk by infants and young children is short, so infants and young children are prone to sucking in air bubbles and causing bloating, leading to infants and young children spitting up, which is not conducive to the feeding of infants and young children.

[0004] The existing Chinese patent document with publication number CN217815172U discloses a back gas valve for installation on a container, which includes a valve body and an air passage formed along the axial direction of the valve body; the valve body includes a valve lip portion and a valve body portion; the valve lip portion is located above the valve body portion, the valve lip portion is a boss enclosed by a diaphragm, and the wall thickness is less than that of the valve body portion; the air passage penetrates the valve body portion, and the valve lip portion is provided with an air gap connected with the air passage, which is closed when the container is not under negative pressure and opened when the container is under negative pressure. In the above patent, when the gas is back, the external gas enters the container through the air gap opened by the air passage, and when the gas is not back, the air gap is in a closed state, playing a one-way conduction role. It can compensate for the negative pressure in the back gas container.

[0005] However, the valve lip portion in the above patent is only one, and when the feeding bottle is forgotten to be cleaned, the residual milk in the feeding bottle may condense on the valve lip portion, causing the air gap to be blocked, thereby affecting the use of the feeding bottle. UTILITY MODEL CONTENTS

[0006] The utility model aims to provide a back gas valve which can reduce the possibility of valve mouth blockage.

[0007] To achieve the above object, the utility model discloses the following technical scheme: a back gas valve, including with the valve body of cooperation of container and set up on the valve body and the valve nozzle of valve body, the valve body sets up at the bottom of container, and the air passage of being opened with the container interior intercommunication is passed through the valve body on the valve body, and the air slit of being opened with the air passage intercommunication is on the valve nozzle, and the air slit is closed when being non-negative pressure in the container, and opens when being negative pressure in the container, and the number of valve nozzle is not less than 2.

[0008] The technical principle of the utility model is as follows:

[0009] When the infant sucks, the external gas is back to the container through the air slit and the air passage, and the pressure in the container is supplemented, and when one of the valve nozzles is blocked, the other valve nozzles can still be used.

[0010] Further, the valve body includes the valve disc, the valve neck and the valve head arranged coaxially from bottom to top, the valve disc is used with the container, the through hole communicating with the container interior is opened on the valve disc, the valve neck is cylindrical and is arranged at the through hole, the valve nozzle is arranged on the valve head, and the air slit is communicated with the through hole.

[0011] Further, the surface of the valve head is a concave surface, and the valve nozzle is arranged on the concave surface.

[0012] Further, the projection area of the valve head on the axial direction is greater than the projection area of the valve neck on the axial direction.

[0013] Further, the outer periphery of the valve head is rounded.

[0014] Further, the thickness of the valve nozzle is less than the thickness of the valve body.

[0015] The utility model has the advantages of:

[0016] 1. When one of the valve nozzles is blocked, the other valve nozzles can still be used, and the use of the feeding bottle is not affected.

[0017] 2. When back gas, the external gas enters the container through the air slit and the air passage to supplement the air pressure in the container, and the gas entering the container does not pass through the liquid in the bottle directly into the bottle; the liquid in the bottle is sucked by the infant, so that the air bubbles sucked by the infant can be reduced; when not back gas, the air slit is closed to play the role of one-way conduction, and the liquid in the container is prevented from leaking. DRAWINGS

[0018] Fig. 1 It is the structural schematic diagram of the utility model;

[0019] Fig. 2 It is the front view of the utility model;

[0020] Fig. 3 It is the bottom view of the utility model.

[0021] In the above drawings:

[0022] 1. valve body; 101. valve disc; 102. valve neck; 103. valve head; 104. round corner; 105. through hole;

[0023] 2. valve nozzle; 201. air gap. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. The structures described in various embodiments can be freely combined without structural or principle conflicts.

[0025] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense. For example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] In the description of the present application, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship commonly used when the product of the present application is used, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0027] Some embodiments of the present application will be described below with reference to the drawings:

[0028] As Figs. 1-3 shown, the present application provides a return valve, which comprises a valve body 1 used in cooperation with a container and a valve nozzle 2 arranged on the valve body 1, the valve body 1 is arranged at the bottom of the container, the valve body 1 is provided with an air passage penetrating through the valve body 1 and communicating with the inside of the container, the valve nozzle 2 is provided with an air gap 201 communicating with the air passage, the air gap 201 is closed when the pressure in the container is non-negative and opened when the pressure in the container is negative, and the number of valve nozzles 2 is not less than 2.

[0029] When the container has liquid, the backflow valve is submerged by the liquid in the container, and the total pressure of the liquid and gas in the container at the backflow valve is greater than the atmospheric pressure. When the backflow valve does not contact the liquid in the container, the gas pressure in the container is equal to the atmospheric pressure outside. When the baby is fed by the feeding bottle, the baby is generally in a lying or inclined state, and the feeder needs to invert or tilt the feeding bottle to feed the baby, at which time the liquid in the bottle does not contact the valve body 1, and the liquid in the bottle can be prevented from leaking. When sucking, the outside gas flows back to the container through the air gap 201 and the air path to make up the pressure in the container; when not in use, the air gap 201 is in a closed state, which plays a role of one-way conduction and prevents the liquid in the container from leaking.

[0030] The number of valve nozzles 2 is greater than one, which can improve the efficiency of air supplementing, and when one of the valve nozzles 2 is blocked, air can be backflowed through the other valve nozzles 2. For the convenience of manufacturing, while reducing the possibility of valve nozzle blockage affecting the use of the feeding bottle, the number of valve nozzles 2 is three, and the three valve nozzles are evenly distributed on the valve body, and the included angle between the three valve nozzles is 120°.

[0031] Further, as shown in Figs. 1-3 The valve body 1 includes a valve disc 101, a valve neck 102 and a valve head 103 arranged coaxially from bottom to top, the valve disc 101 is used in cooperation with the container, a through hole 105 communicating with the inside of the container is opened on the valve disc 101, the valve neck 102 is cylindrical and is arranged at the through hole 105, the valve nozzle 2 is arranged on the valve head 103, and the air gap 201 communicates with the through hole 105. The surface of the valve head 103 is a concave surface, the valve nozzle 2 is arranged on the concave surface, the projection area of the valve head 103 in the axial direction is greater than the projection area of the valve neck 102 in the axial direction. A fillet 104 is formed at the outer circumferential circle of the valve head 103.

[0032] The valve nozzle 2 is arranged on the concave surface, and the pressure is concentrated, which can ensure the reliability of the sealing and reduce the possibility of liquid leakage from the air gap 201.

[0033] Further, as shown in Fig. 1 The thickness of the valve nozzle 2 is less than the thickness of the valve body 1. Through the above arrangement, the reliability of the action of the valve nozzle 2 during air backflow and sealing can be improved.

Claims

1. A return valve characterized by: The valve body (1) is arranged at the bottom of the container, and the gas passage is formed through the valve body (1) and communicates with the inside of the container, the valve nozzle (2) is provided on the valve body (1), and the gas slit (201) is formed on the valve nozzle (2) and communicates with the gas passage, the gas slit (201) is closed when the pressure in the container is non-negative and is opened when the pressure in the container is negative, and the number of valve nozzles is not less than 2.

2. A gas return valve according to claim 1, wherein The valve body (1) comprises a valve disc (101), a valve neck (102) and a valve head (103) arranged coaxially from bottom to top, the valve disc (101) is used in cooperation with the container, the through hole (105) is formed on the valve disc (101) and communicates with the inside of the container, the valve neck (102) is cylindrical and communicates with the through hole (105), and the valve nozzle (2) is arranged on the valve head (103), and the gas slit (201) communicates with the through hole (105) through the valve neck (102).

3. A gas return valve according to claim 2, wherein The surface of the valve head (103) is concave, and the valve nozzle (2) is arranged on the concave surface.

4. A gas return valve according to claim 2 or 3, wherein The projection area of the valve head (103) in the axial direction is greater than the projection area of the valve neck (102) in the axial direction.

5. A gas return valve according to claim 2 or 3, wherein A round corner (104) is formed at the outer periphery of the valve head (103).

6. A gas return valve according to claim 4, wherein A round corner (104) is formed at the outer periphery of the valve head (103).

7. A return valve according to claim 1, 2, 3 or 6, wherein The thickness of the valve nozzle (2) is less than the thickness of the valve body (1).

8. A gas return valve according to claim 4, wherein The thickness of the valve nozzle (2) is less than the thickness of the valve body (1).

9. A gas return valve according to claim 5, wherein The thickness of the valve nozzle (2) is less than the thickness of the valve body (1).

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