Removable and washable dustproof exhaust valve for vacuum containers

Abstract

To provide a removable and washable dustproof exhaust valve for vacuum containers that improves the vacuum maintenance capacity and storage hygiene safety of the container, and allows the user to directly remove and clean or replace the elastic valve body, thereby extending the service life. [Solution] The dustproof exhaust valve includes an upper cover 1 with a ventilation opening 7 at the center of its top and an opening auxiliary structure 4 on its side wall; a valve body base 2 connected to the upper cover and with a ventilation hole at the center of its bottom; an elastic valve body provided inside the valve body base and covering the area above the ventilation hole; and a filtration member provided at the bottom of the valve body base and covering the ventilation hole. Gas enters the exhaust valve through the filtration member and the ventilation hole and is discharged through the elastic valve body and the ventilation opening. The opening auxiliary structure allows the upper cover to be opened and used to remove the elastic valve body.

Description

Technical Field

[0001] The present invention relates to the field of vacuum freshness preservation technology, and particularly to a detachable and washable dust-proof exhaust valve for a vacuum container.

Background Art

[0002] In the application scenario of a vacuum freshness preservation container, the exhaust valve is a core member for achieving evacuation and vacuum maintenance of the container. The exhaust valves used in conventional vacuum freshness preservation containers achieve their sealing functions mainly by relying on a single elastic structure. After long-term use, the elastic members are prone to deterioration and deformation, and dust particles in the external environment are likely to enter the valve, causing malfunction of the sealing structure, and ultimately resulting in a decrease in sealing performance and difficulty in maintaining the vacuum degree in the container for a long time, leading to the problem of gradual decrease in the vacuum degree. In addition, when the external air pressure fluctuates, contaminants such as dust and microorganisms are likely to enter the container, contaminating the contents stored in the container.

[0003] The valve body is an important member that affects the sealing performance of the exhaust valve. It is extremely easy to adsorb contaminants such as food juice, powder or condensed water during the evacuation process. If these contaminants accumulate for a long time, not only will the material of the valve body corrode and bacteria multiply, but it will also directly cause poor closing of the valve, further exacerbating the problem of poor vacuum.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The object of the present invention is to provide a detachable and washable dust-proof exhaust valve for a vacuum container in order to solve the problems in the prior art such as low maintainability of the vacuum degree, easy contamination, and difficulty in maintenance.

Means for Solving the Problems

[0005] I In order to solve the above technical problems, the present invention provides a detachable and washable dust-proof exhaust valve for a vacuum container. The upper lid has a ventilation opening in the center of the top and an opening support structure on the side wall, A valve body base connected to the upper cover and having a ventilation hole in the center of its bottom, An elastic valve body provided within the valve body base and covering the area above the vent hole, The valve body base includes a filtration member provided at the bottom and covering the vent hole, The gas enters the interior of the exhaust valve through the filter member and the vent hole, and is discharged through the elastic valve body and the vent. Here, the opening assist structure allows the upper lid to be opened and is used to remove the elastic valve body.

[0006] Furthermore, a first connecting structure is provided at the bottom of the upper lid, A second connecting structure is provided on the valve body base, which engages with the first connecting structure, and the valve body base and the upper cover are connected by the first connecting structure and the second connecting structure.

[0007] Furthermore, the filtration member is installed as a mesh structure, with mesh gaps of 0.1 to 0.5 mm.

[0008] Furthermore, a plurality of ventilation passages are provided on the inner top of the upper cover, and these ventilation passages are uniformly distributed along the circumferential direction of the upper cover, with some of these ventilation passages communicating with the ventilation opening.

[0009] Furthermore, the opening assist structure is a groove or projection.

[0010] Furthermore, the elastic valve body has an umbrella-shaped or duckbill-shaped structure, is 2.1 to 2.3 cm in size, and has multiple pores with a length of 0.6 to 0.8 cm.

[0011] Furthermore, the valve body base is provided with a valve chamber for housing the elastic valve element. The outer bottom of the valve chamber is used to attach the exhaust valve to a predetermined mounting position in the container.

[0012] Furthermore, a positioning structure is provided on the edge or bottom of the elastic valve body, and a position limiting groove that conforms to the positioning structure is provided on the inner wall of the valve chamber, and the elastic valve body is fixed inside the valve chamber by the positioning structure and the position limiting groove.

[0013] Furthermore, the outer bottom of the valve chamber includes a first portion located at the center and a second portion that is concentric with the first portion and surrounds the outside of the first portion in an annular shape, and the ventilation hole is provided in the central part of the first portion.

[0014] Furthermore, both the first and second portions are provided with several intake passages, and the intake passages provided in the first portion extend radially outward from the vent holes to the outer edge of the first portion. The intake passage provided in the second portion is uniformly distributed along the circumferential direction of the second portion and extends from the inner circumferential edge of the second portion to the outer circumferential edge of the second portion. A portion of the intake passage of the first part and a portion of the intake passage of the second part lie on the same straight line. [Effects of the Invention]

[0015] This invention has at least the following beneficial effects compared to the prior art. This invention effectively prevents contaminants such as dust and microorganisms from entering the container by providing a filtration member to cover the vent hole, thereby forming a physical protective barrier in the path through which gas enters the exhaust valve. Combined with an elastic valve body covering the upper part of the vent hole, this provides double protection, improving the vacuum maintenance capacity and storage hygiene safety of the container. Furthermore, the upper lid can be easily opened with an opening assist structure, allowing the user to directly remove and clean or replace the elastic valve body, thereby extending the service life of the exhaust valve. [Brief explanation of the drawing]

[0016] [Figure 1]It is a schematic diagram of the overall structure of the exhaust valve in the embodiment of the present invention. [Figure 2] It is a specific diagram of the upper cover in one embodiment of the present invention. [Figure 3] It is a schematic diagram of the structure of the upper cover in one embodiment of the present invention from another viewing angle. [Figure 4] It is a schematic diagram of the structure in which the upper cover of the exhaust valve in one embodiment of the present invention is omitted. [Figure 5] It is a schematic diagram of the structure of the elastic valve body in one embodiment of the present invention. [Figure 6] It is a schematic diagram of the structure of the valve body base in one embodiment of the present invention. [Figure 7] It is a schematic diagram of the structure of the valve body base in one embodiment of the present invention from another viewing angle.

Mode for Carrying Out the Invention

[0017] Based on the suggestions in this specification, those skilled in the art can form new technical solutions by cross-combining different embodiments on the premise that no technical contradictions occur, and all such modifications should be regarded as belonging to the protection scope of this application.

[0018] Hereinafter, with reference to the schematic diagrams, the detachable and washable dust-proof exhaust valve for a vacuum container of the present invention will be described in more detail. Here, preferred embodiments of the present invention are shown, but those skilled in the art should understand that they can still modify the present invention described here while realizing the advantageous effects of the present invention. Therefore, the following description should be widely understood by those skilled in the art and does not limit the present invention.

[0019] In the following paragraphs, the present invention will be specifically described by way of examples while referring to the drawings. Through the following description, the advantages and features of the present invention will become clearer. Note that the drawings all adopt very simplified forms and are shown at inaccurate ratios, and are only used as an aid for easily and clearly explaining the purpose of the embodiments of the present invention.

[0020] As shown in Figures 1 to 7, an embodiment of the present invention provides a removable and washable dustproof exhaust valve for a vacuum container, comprising an upper lid 1, a valve body base 2, an elastic valve body 3, and a filtration member 15, each of which works together to complete the functions of gas guidance, sealing, and protection.

[0021] Here, a ventilation opening 7 is provided at the center of the top of the upper lid 1, and an opening assist structure 4 is provided on the side wall of the upper lid 1. The size of the hole diameter of the ventilation opening 7 can be specifically designed according to the requirements of the volume of the vacuum vessel and the vacuuming speed, thereby allowing the gas to be discharged quickly and smoothly. The opening assist structure 4 provides a fulcrum for the user when opening the upper lid 1, making it easier for the user to grip and apply force, thereby allowing the user to open the upper lid 1 via the opening assist structure in order to remove the elastic valve body 3 and clean the inside of the exhaust valve. Such a removable design greatly improves the convenience of maintenance of the exhaust valve, extends the overall service life, and reduces operating costs.

[0022] The valve body base 2 is detachably connected to the upper cover 1, facilitating subsequent maintenance. A vent hole 11 is provided in the center of the bottom of the valve body base 2, which is advantageous for uniform gas introduction and even pressure distribution.

[0023] The elastic valve body 3 is provided within the valve body base 2 and covers the vent hole 11 above. The elastic valve body 3 is made of an elastic material and can deform in response to changes in pressure difference. When the pressure inside the container is greater than the external pressure, the elastic valve body 3 deforms or opens under the action of the pressure to allow gas to pass through, and when the pressure inside the container is less than or equal to the external pressure, the elastic valve body 3 returns to its original state or closes under the action of its own elastic force to prevent external gas and impurities from entering the container.

[0024] The filtration member 15 is provided at the bottom of the valve body base 2 and covers the vent hole 11. The filtration member 15 performs a primary filtration function, thereby filtering the gas entering the exhaust valve and preventing external impurities such as dust and particulate matter from entering the inside of the exhaust valve, extending the service life of the elastic valve body 3 and preventing clogging of the vent hole 11 by impurities. Specifically, the filtration member 15 can be manufactured from a porous filter mesh, sponge, nonwoven fabric, or other material having a filtering function.

[0025] In the operation of this embodiment, gas enters the exhaust valve through the filter member and the vent hole 11. First, relatively large particle impurities are removed by filtration by the filter member, and then the gas passes through the vent hole 11 and enters the valve body base 2. When the pressure inside the container rises to a certain level, the elastic valve body 3 is pushed by the gas and deforms or opens, causing the gas to flow continuously upward and finally discharged to the outside environment through the vent 7, forming a completely vacuumed airflow passage. After the pressure inside the container decreases, the elastic valve body 3 returns to a closed state under the action of its own elastic force, preventing outside air from flowing back into the container.

[0026] In this embodiment, as shown in Figures 2 and 6, a first connection structure 5 is provided at the bottom of the upper cover 1, and a second connection structure 6 that engages with the first connection structure 5 is provided on the valve body base 2, and the valve body base 2 and the upper cover 1 are connected by the first connection structure 5 and the second connection structure 6. This connection method achieves a removable connection between the upper cover 1 and the valve body base 2, which not only ensures airtightness after the upper cover 1 and the valve body base 2 are connected, but also provides convenience for subsequent removal and maintenance, allowing the user to complete the disassembly operation without using specialized tools.

[0027] Furthermore, the first connection structure 5 and the second connection structure 6 are either screw connection structures or snap connection structures.

[0028] When using a screw connection structure, connection to or disconnection from the valve body base 2 can be achieved simply by rotating the upper cover 1, resulting in a robust connection, excellent sealing performance, and suitability for situations where frequent removal is required.

[0029] When using a snap connection structure, quick connection or disconnection can be achieved simply by pressing or twisting the snap, making operation easier and suitable for situations where operating speed is a high requirement, thus meeting the diverse needs of various users.

[0030] In this embodiment, the filtration member 15 is provided in a mesh structure, with mesh gaps of 0.1 to 0.5 mm. The mesh structure design allows for smooth passage of gas and effectively blocks solid particulate matter. When the mesh gaps are 0.1 mm, the filtration member 15 has high filtration accuracy and can block smaller impurities such as dust, hair, and fibers, providing a higher level of protection, making it particularly suitable for food storage or the preservation of precision items where cleanliness is a high requirement. When the mesh gaps are 0.5 mm, the filtration member 15 has better air permeability, lower gas flow resistance, and faster exhaust speed, making it suitable for large-capacity containers that need to be quickly evacuated or for situations where they are frequently opened.

[0031] In the specific installation process, the filter member 15 and the valve body base 2 are connected and fixed by a thermocompression process or an ultrasonic process. The thermocompression process eliminates the need for separate adhesives or fasteners, thus avoiding problems such as off-odors, deterioration, or leaching of chemicals that may occur with adhesives, making it particularly suitable for vacuum containers in food contact systems and meeting food safety and hygiene requirements. The ultrasonic process is characterized by its fast welding speed and high efficiency, making it suitable for mass automated production and significantly reducing production costs and time. Specifically, the appropriate connection method can be selected according to the needs of use.

[0032] In this embodiment, as shown in Figure 3, a plurality of ventilation passages 8 are provided on the inner top of the upper cover 1, and these ventilation passages 8 are uniformly distributed along the circumferential direction of the upper cover 1, with some of the ventilation passages 8 communicating with the ventilation opening 7. By providing the ventilation passages 8, gas can be guided through, preventing gas from accumulating inside the exhaust valve. The plurality of ventilation passages 8, uniformly distributed along the circumferential direction, allow gas to be collected and discharged from the ventilation opening 7 from different directions, thereby improving exhaust efficiency. Furthermore, a smooth transition design is used for the inner wall of the ventilation passages 8, reducing resistance in the gas flow process and further optimizing the vacuum effect.

[0033] Furthermore, a geometric structure is provided on the upper surface of the upper cover 1, and by appropriate pattern design and surface shaping, the occurrence of shrinkage marks (surface indentations and sink marks caused by shrinkage) is effectively avoided. The geometric structure may be an uneven texture, a grid pattern, a striped pattern, a dot pattern, a wave pattern, or other regular or irregular geometric shapes. That is, in this embodiment, as shown in Figure 1, a fan-shaped pattern is provided on the upper surface of the upper cover 1.

[0034] In this embodiment, the opening assistance structure is a groove or a projection. When the opening assistance structure 4 is a groove, it extends along the circumferential direction to form an annular groove, allowing the user to easily open the upper lid 1 by placing their finger in the groove and applying force. When the opening assistance structure 4 is a projection, the projection provides a position that is easy to grasp with the finger, and by increasing friction, the force required for the opening operation is reduced. The design of the groove or projection is simple and practical, and neither requires a separate opening tool, making them easy to use.

[0035] In this embodiment, the elastic valve body 3 may have an umbrella-shaped structure or a duckbill-shaped structure.

[0036] When an umbrella-shaped structure is used for the elastic valve body 3, its shape resembles an open umbrella, with the center of the umbrella-shaped structure covering the vent hole 11, and the edges of the umbrella-shaped structure being in close contact with or fixed to the inner wall of the valve chamber. Under the action of pressure, the center of the umbrella-shaped structure protrudes upward, and a curve occurs at the periphery, forming a gas flow path. When the pressure is released, the elastic material returns the umbrella-shaped structure to its original state, sealing the vent hole 11 again.

[0037] When a duckbill-shaped structure is used for the elastic valve body 3, its shape resembles a duckbill and is formed by bonding two elastic materials facing each other. The open end of the elastic valve body 3 faces the vent hole 11, and when vacuum is applied, the duckbill-shaped opening is opened by the pressure of the gas, and after the gas has passed, the opening closes under elastic action. The duckbill-shaped structure has excellent one-way sealing performance, effectively prevents gas backflow, and can guarantee the degree of vacuum inside the container.

[0038] In actual use, the elastic valve body 3 is manufactured from an elastic material such as silica gel or fluororubber. Such materials have good elastic recovery and degradation resistance, can maintain sealing performance for a long period of time, and have stable chemical properties, so that the items stored in the container are not contaminated.

[0039] Furthermore, the elastic valve body is 2.1 to 2.3 cm in size, and is provided with multiple pores 0.6 to 0.8 cm in length. These multiple pores are uniformly arranged around the circumference of the elastic valve body 3, surrounding its center. The size of the elastic valve body and the length of each pore can be specifically selected according to the specifications of the container and exhaust requirements.

[0040] In this embodiment, as shown in Figure 6, the valve body base 2 is provided with a valve chamber for housing the elastic valve body 3, and the outer bottom of the valve chamber is used to attach the exhaust valve to a predetermined mounting position on the container. The size and shape of the valve chamber are suited to the elastic valve body 3, and it serves to restrict and fix the position of the elastic valve body 3, preventing the elastic valve body 3 from shifting during use, thereby ensuring that the elastic valve body 3 always covers the vent hole 11. The outer bottom of the valve chamber is used to attach the exhaust valve to a predetermined mounting position on the container, and the predetermined mounting position is a mounting hole made in the container. The fitting of the outer bottom of the valve chamber and the mounting hole achieves a stable connection between the exhaust valve and the container, preventing the exhaust valve from falling off during use.

[0041] In this embodiment, a positioning structure 13 is provided on the edge or bottom of the elastic valve body 3, and a position limiting groove 14 that fits the positioning structure 13 is provided on the inner wall of the valve chamber, and the elastic valve body 3 is fixed inside the valve chamber by the positioning structure 13 and the position limiting groove 14. The positioning structure 13 may be a projection, a locking block, a flange, or other form of structural feature, and the position limiting groove 14 may be a recessed groove, a locking groove, a recessed area, or a structure that can effectively limit the circumferential rotation and axial displacement of the elastic valve body 3. The fitting of the positioning structure 13 and the position limiting groove 14 achieves accurate positioning and firm fixation of the elastic valve body 3, thereby preventing the elastic valve body 3 from being displaced or falling out during operation. Furthermore, this positioning method makes it easy to remove and replace the elastic valve body 3, improving maintenance efficiency.

[0042] In one embodiment, the outer bottom of the valve chamber includes a first portion 9 located at the center and a second portion 10 that is concentric with the first portion 9 and surrounds the outside of the first portion 9 in an annular shape, and the ventilation hole 11 is provided in the central part of the first portion 9.

[0043] In another embodiment, as shown in Figure 7, based on the above embodiment, the first portion 9 and the second portion 10 are each further provided with several intake passages 12, the intake passages 12 in the first portion 9 extending radially outward from the vents 11 to the outer peripheral edge of the first portion 9. The intake passages 12 in the second portion 10 are uniformly distributed along the circumferential direction of the second portion 10 and extend from the inner peripheral edge to the outer peripheral edge of the second portion 10. The intake passages 12 on the first portion 9 and the second portion 10 constitute a complex gas collection and guidance system, thereby allowing gas to be collected into the vents 11 from multiple directions, improving the velocity and uniformity of the intake air.

[0044] During actual use, the cross-section of the intake passage 12 may be arc-shaped or rectangular. An intake passage 12 with an arc-shaped cross-section has lower gas flow resistance, while an intake passage 12 with a rectangular cross-section is easier to manufacture, and can be selected according to actual production needs.

[0045] Furthermore, a portion of the intake passage 12 of the first section 9 and a portion of the intake passage 12 of the second section 10 are on the same straight line. This aligned passage design allows the gas to quickly enter the vent hole 11 along the straight passage, reducing the resistance to changing direction during gas flow and further improving intake efficiency. In addition, the fitting of the coaxially installed intake passages 12 with the other intake passages creates an orderly intake arrangement, which allows the gas to enter the exhaust valve completely and quickly, thus shortening the vacuuming time.

[0046] In actual installation and use, the first portion 9 and the second portion 10 of the outer bottom of the valve chamber may or may not have several intake passages 12.

[0047] If both the first part 9 and the second part 10 are provided with several intake passages 12, the gas inside the container is provided with multidirectional, multipath exhaust passages, significantly increasing the total cross-sectional area of ​​the intake and greatly improving exhaust efficiency.

[0048] If the intake passage 12 is not provided in the first part 9 and the second part 10, such an intake passage-less design has a simpler structure, a simpler manufacturing process, lower production costs, and is particularly suitable for cost-sensitive consumer products.

[0049] This flexible and selectable structural design allows for adaptive adjustment of the exhaust valve according to different application scenarios and container types, meeting diverse usage needs.

[0050] As described above, this invention effectively prevents contaminants such as dust and microorganisms from entering the container by forming a physical protective barrier in the path through which gas enters the exhaust valve by providing a filter member to cover the vent hole. Combined with an elastic valve body covering the upper part of the vent hole, it provides double protection, improving the vacuum maintenance capacity and storage hygiene safety of the container. Furthermore, the upper lid can be easily opened with an opening assist structure, allowing the user to directly remove and clean or replace the elastic valve body, thus extending the service life of the exhaust valve. The exhaust valve has a compact overall structure, is easy to install, and can be widely applied to all kinds of containers requiring vacuum storage, such as food storage containers, grain storage cans, and pharmaceutical containers, making it highly practical.

[0051] Clearly, those skilled in the art can make various modifications and variations to the present invention without departing from its spirit and scope. Thus, if these modifications and variations of the present invention fall within the scope of the claims of this utility model and its equivalent technical scope, the present invention is intended to include these changes and variations. [Explanation of symbols]

[0052] 1...Upper cover, 2...Valve body base, 3...Elastic valve body, 4...Opening assist structure, 5...First connection structure, 6...Second connection structure, 7...Ventilation port, 8...Ventilation passage, 9...First part, 10...Second part, 11...Ventilation hole, 12...Intake passage, 13...Positioning structure, 14...Position limiting groove, 15...Filtration member.

Claims

1. The upper lid has a ventilation opening in the center of the top and an opening support structure on the side wall, A valve body base connected to the upper cover and having a ventilation hole in the center of its bottom, An elastic valve body provided within the valve body base and covering the area above the vent hole, The valve body base includes a filtration member provided at the bottom and covering the vent hole, The gas enters the interior of the exhaust valve through the filter member and the vent hole, and is discharged through the elastic valve body and the vent. Here, the opening assist structure allows the upper lid to be opened and is used to remove the elastic valve body. A removable and washable dustproof exhaust valve for vacuum vessels, characterized by the following features.

2. A first connecting structure is provided at the bottom of the upper cover. A removable and washable dustproof exhaust valve for a vacuum container according to claim 1, characterized in that a second connection structure that engages with the first connection structure is provided on the valve body base, and the valve body base and the upper cover are connected by the first connection structure and the second connection structure.

3. The removable and washable dustproof exhaust valve for a vacuum container according to claim 1, characterized in that the filtration member is installed as a mesh structure and the mesh gap is 0.1 to 0.5 mm.

4. A removable and washable dustproof exhaust valve for a vacuum container according to claim 1, characterized in that a plurality of ventilation passages are provided in the inner top of the upper lid, the plurality of ventilation passages are uniformly distributed along the circumferential direction of the upper lid, and some of the ventilation passages communicate with the ventilation opening.

5. The removable and washable dustproof exhaust valve for a vacuum container according to claim 1, characterized in that the opening assist structure is a groove or projection.

6. The elastic valve body has an umbrella-shaped or duckbill-shaped structure, and the size of the elastic valve body is 2.1 to 2.3 cm. The removable and washable dustproof exhaust valve for a vacuum container according to claim 1, characterized in that the elastic valve body is provided with a plurality of pores having a length of 0.6 to 0.8 cm.

7. The valve body base is provided with a valve chamber for housing the elastic valve body. The removable and washable dustproof exhaust valve for a vacuum container according to claim 1, characterized in that the outer bottom of the valve chamber is used to attach the exhaust valve to a predetermined mounting position of the container.

8. A removable and washable dustproof exhaust valve for a vacuum vessel according to claim 7, characterized in that a positioning structure is provided on the edge or bottom of the elastic valve body, a position limiting groove that conforms to the positioning structure is provided on the inner wall of the valve chamber, and the elastic valve body is fixed inside the valve chamber by the positioning structure and the position limiting groove.

9. The outer bottom of the valve chamber includes a first portion located at the center and a second portion that is concentric with the first portion and surrounds the outside of the first portion in an annular manner. The removable and washable dustproof exhaust valve for a vacuum container according to claim 8, characterized in that the central part of the first portion is provided with the ventilation hole.

10. The first and second portions are each provided with several intake passages, and the intake passages provided in the first portion extend radially outward from the vents to the outer edge of the first portion. The intake passage provided in the second portion is uniformly distributed along the circumferential direction of the second portion and extends from the inner circumferential edge of the second portion to the outer circumferential edge of the second portion. The removable and washable dustproof exhaust valve for a vacuum vessel according to claim 9, characterized in that a portion of the intake passage of the first part and a portion of the intake passage of the second part are on the same straight line.

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